JP6511565B1 - Release agent supply monitoring device and release agent spray device for glass bottle molding die - Google Patents

Abstract

The present invention provides a release agent supply monitoring device capable of more accurately detecting a spray abnormality of a high viscosity release agent, and a release agent spray device for a glass bottle molding die.
A mold release agent supply monitor 50 includes a detection unit 51. The detection unit 51 detects the release agent L 1 in order to confirm the presence or absence of the spray abnormality of the release agent L 1 in the release agent spraying device 3. The detection unit 51 includes light sensors 52 and 53 having different detection results when the release agent L1 is detected and when it is not detected.
[Selected figure] Figure 3

Description

  The present invention relates to a release agent supply monitoring device and a release agent spraying device for a glass bottle molding die.

  In a factory etc., a fluid supply device may be used (for example, refer to patent documents 1). The fluid supply device described in Patent Document 1 includes a syringe pump, and the syringe pump pumps the liquid under pressure.

  By the way, in the glass bottle manufacturing process, usually, a gob (a high-temperature molten glass mass) is roughly molded into a parison. The parison is then transferred to a finishing mold and blown up with compressed air in the finishing mold for final shaping. This completes the forming of the glass bottle. In molds such as rough molds and finishing molds, lubricity and releasability are required to be large, and it is important to apply a mold release agent (wherein the mold release agent has a lubricating action). . Therefore, the release agent needs to be applied to the inner surface of the mold periodically, for example, every several tens of minutes in order to prevent the decrease in the lubricity and the releasability.

Patent No. 4957957 Specification

  The release agent is usually highly viscous. When this mold release agent is sprayed onto the inner surface of the mold by a spray nozzle, the highly viscous mold release agent may clog the nozzle. If the mold release agent is clogged by the nozzle, it is impossible to spray an appropriate amount of the mold release agent onto the mold. For this reason, it is important in the manufacture of glass bottles of equal quality to be able to detect the spray abnormality of the release agent.

  The present invention has been made in view of the above-mentioned circumstances, and a release agent supply monitoring device capable of more accurately detecting a spray abnormality of a high viscosity release agent, and release to a glass bottle molding die It aims at providing an agent spray device.

  (1) In order to solve the above problems, a release agent supply monitoring device according to an aspect of the present invention is the release agent in the release agent spray device for spraying a release agent to a glass bottle molding die. And a detection unit for detecting the release agent in order to confirm the presence or absence of the spray abnormality.

  According to this configuration, when the detection unit detects the release agent, it is possible to more accurately detect the spray abnormality related to the release agent with high viscosity.

  (2) The detection unit is installed on a pump that supplies the release agent to the spray nozzle of the release agent spraying device, and the pump sucks the release agent with a working fluid, and the release agent The detection unit may detect a volume change of the release agent in the syringe.

  According to this configuration, the detection unit can detect the spray abnormality of the release agent more accurately by detecting the change in volume of the release agent as a large element of change in the syringe at the time of spraying the release agent.

  (3) The syringe may have a port through which the working fluid passes, and a release agent storage unit in which the release agent is stored.

  According to this configuration, the detection unit can detect, for example, the spray abnormality of the release agent by detecting a change in volume of the release agent in the release agent storage unit.

  (4) The detection unit may detect the presence or absence of a spraying abnormality of the release agent by detecting a change in the liquid surface position of the release agent in the release agent storage unit.

  According to this configuration, the detection unit can detect a spray abnormality of the release agent with a simple configuration that detects a change in the liquid surface position of the release agent.

  (5) The detection unit may include an optical sensor that detects light.

  According to this configuration, the light sensor of the detection unit can detect the release agent in a noncontact manner. As a result, the high viscosity release agent does not stick to the light sensor.

  (6) The syringe may include a light transmitting portion, and the light sensor may detect the release agent through the light transmitting portion.

  According to this configuration, the optical sensor can be more reliably prevented from coming into contact with the release agent. Moreover, it is not necessary to embed the light sensor in the syringe, and the degree of freedom of the installation position of the light sensor on the syringe can be further increased.

  (7) The inner diameter of the syringe may be 3.0 mm to 6.0 mm.

  According to this configuration, when the inner diameter of the syringe is less than 3.0 mm, the release agent remaining on the inner peripheral surface (wall surface) of the syringe after ejection of the release agent is stuck by surface tension to form a bridge (air Will be rolled up). If suction is performed in this state, the detection unit misidentifies the bridge portion as the liquid level instead of the original liquid level, and the syringe can not suck a predetermined amount, and can not perform quantitative discharge at the next discharge. In addition, a highly viscous release agent adheres to the inner circumferential surface of the syringe, which makes it difficult to move smoothly in the syringe, and it becomes easier to form a bridge. On the other hand, by setting the inner diameter of the syringe to 3.0 mm or more, the flowability of the release agent in the syringe can be increased, and smooth movement of the release agent in the syringe can be realized with driving of the pump. Can also be suppressed. As a result, detection of the release agent by the detection unit can be performed more accurately. In addition, when the inner diameter of the syringe exceeds 6.0 mm, the change in the flow rate of the release agent with respect to the liquid level change of the release agent in the syringe becomes large. For this reason, a change between the liquid surface position of the mold release agent when the mold release agent is sucked into the syringe and the liquid level position of the mold release agent when the mold release agent is discharged from the syringe is reduced. For this reason, it becomes difficult for a detection part to detect the state change of a mold release agent correctly. That is, by setting the inner diameter of the syringe to 6.0 mm or less, it is possible to further increase the liquid level change of the release agent in the syringe accompanying driving of the pump. Thereby, a detection part can detect a mold release agent more correctly.

  (8) The syringe has a port through which the working fluid passes, and a release agent storage unit in which the release agent is stored, and the critical surface on the inner circumferential surface of the release agent storage unit of the syringe The tension may be 30 mN / m or less.

  According to this configuration, the wettability of the release agent to the inner circumferential surface of the syringe can be further lowered. As a result, the mold release agent in the syringe is transferred more smoothly as the pump is driven. Therefore, the state change detection of the mold release agent by a detection part can be performed more appropriately.

  (9) The pump has a piston disposed in the syringe, and the piston moves in an advancing / retracting direction along the axial direction of the syringe by the working fluid, and the advancing / retracting movement aspirates the release agent And may discharge.

  According to this configuration, by providing the piston, it is possible to smoothly transfer the entire release agent in the syringe, including the release agent in the vicinity of the inner peripheral surface (wall surface) of the syringe as the piston moves.

  (10) The detection unit may detect the position of the piston in the advancing and retracting direction.

  According to this configuration, by detecting the movement of the piston, the detection unit can more accurately detect whether the release agent is discharged from the syringe as set.

  (11) The detection unit may include a probe that is displaced in the advancing and retracting direction in conjunction with the advancing and retracting movement of the piston.

  According to this configuration, the detection unit can detect the movement of the piston, that is, the spraying state of the release agent through the displacement of the probe.

  (12) The probe may be released from connection with the piston and maintained at a predetermined position when the displacement amount of the piston at the time of discharging the release agent is equal to or more than a predetermined value.

  According to this configuration, the tolerance of the movement amount of the probe may be less than the maximum movement amount of the piston. Therefore, the sensitivity of the probe (the gain of the probe output with respect to the movement of the piston) can be increased. Thereby, the detection unit can more accurately detect the state change of the release agent in the syringe.

  (13) At least a part of the probe may be accommodated in the syringe.

  According to this configuration, the probe is protected by the syringe. Therefore, it can suppress more reliably that the detection value in a detection part turns into an abnormal value by a probe contacting a foreign material.

  (14) The release agent supply monitoring device may further include a stopper for restricting the displacement of the piston in the advancing and retracting direction to a predetermined range.

  According to this configuration, the amount of movement of the piston does not become too large. For this reason, the tolerance of the movement amount of the probe may be small. Therefore, the sensitivity of the probe can be increased. Thereby, the detection unit can more accurately detect the state change of the release agent in the syringe. Moreover, when suction more than a setting is performed due to pressure abnormality or the like, damage to the detection unit can be prevented.

  (15) In order to solve the above problems, according to one aspect of the present invention, a release agent spray device comprises: the release agent supply monitoring device; a pump for supplying the release agent; And a spray nozzle for spraying the release agent.

  According to this configuration, the mold release agent supply monitoring device can more accurately detect the spray abnormality of the mold release agent. Thereby, it is possible to more surely and early detect the spray abnormality of the release agent from the spray nozzle to the glass bottle molding die. As a result, it is possible to reduce the number of discards when a product failure occurs in a glass bottle manufactured by the glass bottle molding die. Therefore, the yield of glass bottles can be further increased.

  According to the present invention, it is possible to more accurately detect a spraying abnormality of a high viscosity release agent.

It is a schematic plan view of the glass bottle manufacturing apparatus concerning one Embodiment of this invention, and one part is shown in abbreviation / simplification. It is a typical side view of a glass bottle manufacturing apparatus, and showing a part in cross section and omitting a part. It is a typical side view of the mold release agent spraying device of a glass bottle manufacturing apparatus. It is a typical side view of a mold release agent circumference of a mold release agent spraying device, and a part is shown in the section. FIG. 5A is a view showing a suction operation of the release agent pump, and FIG. 5B is a view showing a discharge operation of the release agent pump. It is a figure which shows the principal part of one modification of this invention. It is a schematic side view of the mold release agent spraying apparatus which concerns on another modification. FIG. 8A is a view showing the main part of the modified example shown in FIG. 7, and shows a state in which the piston is located at the upper limit position. FIG. 8 (B) is a view showing the main part of the modified example shown in FIG. 7 and shows a state in which the piston is located at the lower limit position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic plan view of a glass bottle manufacturing apparatus 1 according to an embodiment of the present invention, and a portion thereof is shown in a simplified manner. FIG. 2 is a schematic side view of the glass bottle manufacturing apparatus 1, showing a part in cross section and a part omitted. FIG. 3 is a schematic side view of the mold release agent spraying device 3 of the glass bottle manufacturing apparatus 1. FIG. 4 is a schematic side view of the periphery of the release agent pump 30 of the release agent spraying device 3 and a part of the side view is shown in cross section.

  1 to 4, glass bottle manufacturing apparatus 1 (hereinafter, also simply referred to as manufacturing apparatus 1) forms gob 101 (a molten glass block) into parison 102, and further parison 102 is a glass bottle. It is molded to 103. The gob 101 is supplied to the manufacturing apparatus 1 from a gob supply mechanism (not shown). Further, in the present embodiment, the manufacturing apparatus 1 can simultaneously form two gobs 101 into the glass bottle 103 for each section 2. In addition, some manufacturing apparatuses 1 can simultaneously form one, three, and four gobs 101 into the glass bottle 103 for each section 2, and the number that can be simultaneously formed in one section is not limited to two.

  The manufacturing apparatus 1 has a plurality of sections 2 and a release agent spraying device 3.

  The sections 2 are provided, for example, 8 to 12, and are arranged at substantially equal intervals along a predetermined arrangement direction A1. The total length of these sections 2 in the arrangement direction A1 is about 6 to 8 m.

  Each section 2 has a rough mold portion 5, a mouth mold portion 6 and a finishing mold portion 7.

  The rough mold part 5 is used to form the gob 101 into the parison 102 in cooperation with the mouth mold part 6. The rough mold part 5 is supplied (filled) with the gob 101 from the above-described gob supply mechanism.

  The rough mold portion 5 has two rough molds 8 and a rough mold opening / closing mechanism (not shown).

  Each rough mold 8 has a pair of split molds 8a and 8b facing each other. A cavity 8 c for filling the gob 101 is formed by combining the molds 8 a and 8 b with each other. The pair of split molds 8a and 8b of each rough mold 8 are opened and closed by a rough mold opening and closing mechanism (not shown).

  When the gob 101 is formed into the parison 102, the mouth mold 9 of the mouth mold 6 is disposed on the lower surface of the rough mold 8. The mouth mold portion 6 is provided to mold the mouth portion 103 a from the gob 101. In addition, the mouth mold portion 6 is configured to transfer the parison 102 formed by the rough mold 8 to the finishing mold portion 7.

  The mouth mold portion 6 has two mouth molds 9, a mouth mold holder 10 for supporting these mouth molds 9, a rotary shaft 11 to which the mouth mold holder 10 is attached, and a mouth mold opening / closing mechanism not shown. doing.

  Each mouth mold 9 has a pair of semi-cylindrical split molds 9a and 9b facing each other, and these split molds 9a and 9b are combined with each other to form a cylindrical mouth mold 9 There is. The split molds 9a and 9b are appropriately switched between an open state separated from each other and a closed state closed to each other by the operation of an open / close mechanism (not shown). When forming the gob 101 into the parison 102, a part of the mouth mold 9 is fitted to the rough mold 8.

  The mouth type holder 10 is an arm member formed in an L shape in the present embodiment. The base end of the mouth holder 10 is attached to a horizontally extending rotary shaft 11, and the rotary holder (not shown) allows the mouth holder 10 and the mouth mold 9 to pivot about the central axis of the rotary shaft 11 is there. By this pivoting motion, the mouth mold 9 reciprocates between the position below the rough mold 8 (the position shown in FIG. 1) and the position above the finishing mold 7.

  The finishing mold portion 7 has two finishing molds 12, two bottom molds 13, and a finishing mold opening / closing mechanism (not shown).

  Each finishing die 12 shapes the glass bottle 103 by forming a portion of the parison 102 excluding the opening 103 a in cooperation with the corresponding bottom die 13. Each finishing die 12 has a pair of split dies 12a, 12b facing each other. The split molds 12a and 12b of the finishing mold 12 are opened and closed by the finishing mold opening and closing mechanism. A finishing mold 12 is formed by combining these split molds 12a and 12b with each other.

  The inner surface of the finishing mold 12 and the upper surface of the bottom mold 13 form a cavity 12 c into which a portion of the parison 102 other than the opening 103 a is inserted. A coating layer is formed on the inner surface of the finishing mold 12 and the top surface of the bottom mold 13 by a carbon coating or the like. Then, the release agent L1 is periodically applied to the inner surface by the spray device 3. The release agent L1 is for making the glass bottle 103 easy to release from the finishing mold 12 and the bottom mold 13.

  In the above-described finishing mold portion 7, the parison 102 is formed in the glass bottle 103 by supplying compressed air for forming from a blow head (not shown) toward the parison 102 disposed mostly in the cavity 12c. . Thereafter, the glass bottle 103 is taken out of the finishing mold 12 by a take-out arm (not shown).

  A release agent L 1 for ensuring releasability (easiness of separation) between the finishing mold 12 and the glass bottle 103 is applied between the molding processes of the glass bottle 103. A release agent spraying device 3 is used to apply the release agent L1. In the following, the release agent spraying device 3 is also referred to simply as the spraying device 3.

  The spray device 3 is provided in one of the plurality of sections 2 with respect to the finishing mold 7. That is, the release agent L1 is sprayed from one spray device 3 to all the finishing molds 7.

  In the present embodiment, although the configuration of the release agent spray to the rough mold portion 5 and the mouth mold portion 6 is not described, the release agent spray to the rough mold portion 5 and the mouth mold portion 6 You may carry out by the spraying apparatus of the same structure.

  As release agent L1 which spray device 3 applies, mineral oil which contains a graphite particle as a solid lubricant can be illustrated. As a characteristic of the release agent L1, the color is black. The viscosity is preferably 1000 cps or less when the # 4 LV spindle is rotated for 30 seconds at a temperature measured by a B-type viscometer according to the ASTM-D2196 standard at 25 ° C.

  In the present embodiment, the spray device 3 is configured to apply the release agent L1 to at least a part of the portion forming the cavity 12c among the inner surfaces of the finishing die 12 and the bottom die 13.

  The spray device 3 includes a transport mechanism 15, a nozzle 16 for spraying the release agent L1, a displacement mechanism 17 for displacing the nozzle 16, and a release agent supply unit 18 for supplying the release agent L1 to the nozzle 16. A control unit 19 that controls the transport mechanism 15, the displacement mechanism 17, and the release agent supply unit 18, and a release agent supply monitoring device 50.

  The transport mechanism 15 is provided to displace the nozzle 16, the displacement mechanism 17, the release agent supply unit 18, and the control unit 19 along the arrangement direction A1. The transport mechanism 15 arranges the nozzle 16 to the side of the finishing mold 7 to which the release agent L1 is sprayed. The transport mechanism 15 includes a drive mechanism (not shown) including a rail 20 extending along the arrangement direction A1, a base member 21 moving on the rail 20, and an electric motor for applying a driving force to the base member 21 in the arrangement direction A1. And). A displacement mechanism 17, a release agent supply unit 18, and a control unit 19 are installed on the base member 21.

  The nozzle 16 is used to spray the release agent L1. The nozzle 16 is formed in an elongated rod shape. The nozzles 16 are provided in the same number as the number of finish dies 12 in one section 2, and in the present embodiment, two are provided. Each nozzle 16 is at least formed to a length that allows the tip of the nozzle 16 to be inserted into the cavity 12c. Each nozzle 16 may spray the release agent L1 while rising, may spray the release agent L1 while falling, or may be released in a stopped state after being inserted into the cavity 12c. You may spray the template L1. A spray port 16 a is formed at the tip and the middle of the nozzle 16. The diameter of the spray port 16a is set to, for example, about 1 mm or less. The mold release agent L1 sprays the mold release agent L1 so as to form, for example, full cone spray patterns B1 and B2 from the spray port 16a.

  The proximal end of each nozzle 16 is fixed to a hollow axial manifold 22. A passage for the release agent L1 is formed in the manifold 22, and the release agent L1 passes through the manifold 22 and the passage in each nozzle 16 and is sprayed from the corresponding spray port 16a.

  When the release agent is sprayed by the nozzle 16, the nozzle 16 may be displaced up and down with respect to the finishing mold 12 by the displacement mechanism 17 or may be stationary.

  The displacement mechanism 17 is used to displace the nozzle 16 with respect to the finishing mold 12 and maintain the position of the nozzle 16. The displacement mechanism 17 is formed, for example, using a multi-joint robot such as a six-axis robot. The displacement mechanism 17 may be at least capable of inserting and removing the nozzle 16 into and from the cavity 12 c of the finishing die 12, and the specific mechanism is not limited. A manifold 22 is fixed to the tip of the displacement mechanism 17. As a result, the manifold 22 and the nozzle 16 are displaced integrally with the tip of the displacement mechanism 17.

  The release agent supply unit 18 is provided to supply the release agent L1 to the nozzle 16 through the manifold 22.

  The release agent supply unit 18 includes a release agent tank 28, a release agent pump 30, and a release agent supply monitor 50.

  The compressed air is supplied from a compressed air supply source 26 including a compressor (not shown) installed at a position away from the release agent supply unit 18 to a release agent tank 28 and a regulator 35 described later of the release agent pump 30. Supplied.

  The release agent tank 28 is a tank in which the release agent L1 is stored. The release agent tank 28 is connected to the compressed air supply source 26 via a regulator 27. The air pressure adjusted by the regulator 27 acts on the release agent L1 in the release agent tank 28.

  The release agent pump 30 is provided to supply the release agent L1 toward the nozzle 16 at a predetermined pressure. In the present embodiment, the release agent pump 30 is a positive displacement pump and is a kind of reciprocating pump. The release agent pump 30 sucks and discharges the release agent L1 using the compressed air supplied from the compressed air supply source 26 as a working fluid.

  The release agent pump 30 has a check valve 31, a relay pipe 32, an on-off valve 33, a syringe 34, and a regulator 35.

  The check valve 31 is connected to the release agent tank 28 and the relay pipe 32. Although the check valve 31 permits movement of the release agent L1 from the release agent tank 28 to the relay pipe 32, a check valve that regulates the backflow of the release agent L1 from the relay pipe 32 to the release agent tank 28 It is.

  The relay pipe 32 is a pipe that connects the check valve 31 (mold release agent tank 28), the syringe 34, and the nozzle 16 (hose 36). The relay pipe 32 is, for example, a T pipe and has three ports, and the check valve 31, the syringe 34, and the on-off valve 33 are connected to these three ports, respectively.

  The on-off valve 33 is, for example, a needle valve, and can be switched between the fully open state and the fully closed state by being given predetermined pilot air. The on-off valve 33 is connected to the manifold 22 via, for example, a flexible hose 36. The release agent L1 having passed through the on-off valve 33 reaches the nozzle 16 through the hose 36 and the manifold 22, and is sprayed from the spray port 16a of the nozzle 16.

  The syringe 34 selectively performs the operation of suctioning the release agent L1 by compressed air and the operation of discharging the release agent L1. The syringe 34 is an elongated cylindrical member, into which the releasing agent L1 and the compressed air are introduced. The syringe 34 is supplied with both high pressure compressed air and high pressure release agent L1. In addition, it is possible that the syringe 34 can uniformly discharge the release agent L1 in the syringe 34 by the action of compressed air, so that a more even amount of release agent can be applied to the portion of the finish mold 7 to be sprayed with the release agent. It is important to apply L1. In addition, the syringes 34 are disposed in the vicinity of the high temperature finishing molds 7. Therefore, the material constituting the syringe 34 is required to have heat resistance. Further, the state of the release agent L1 is optically monitored by the release agent supply monitor 50 for the syringe 34. For this reason, the syringe 34 is formed of a translucent material. That is, in the present embodiment, the entire syringe 34 is a light transmitting portion having light transmitting property. Moreover, it is preferable that the wettability of the mold release agent L1 is low for the inner peripheral surface 34a of the syringe 34. Furthermore, the volume change of the release agent L1 in the syringe 34, that is, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30, is as small as about 0.3 g. The critical surface tension γc of the inner peripheral surface 34a of the syringe 34 (the inner peripheral surface of the release agent container 38 described later) is preferably 30 mN / m or less, and more preferably 25 mN / m or less.

  As a material of the syringe 34 preferable for use in the above-mentioned environment, a transparent tube which is excellent in chemical resistance and pressure resistance is preferable. As such a material, a fluorine resin such as PTFE (polytetrafluoroethylene) or PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer resin) is particularly preferable, and in addition, a silicone resin can be exemplified.

  In the present embodiment, the syringe 34 is formed in a straight cylindrical shape, and in the present embodiment, extends vertically. The inner diameter D1 of the syringe 34 is preferably 3.0 mm to 6.0 mm. More specifically, the lower limit of the inner diameter D1 of the syringe 34 is preferably 4.0 mm or less, and more preferably 3.0 mm. The upper limit of the inner diameter D1 of the syringe 34 is preferably 6.0 mm or less, and more preferably 5.0 mm.

  The syringe 34 has a release agent port 37, a release agent storage unit 38, a compressed air storage unit 39, and a compressed air port 40.

  The release agent port 37 is a port for the inflow and the outflow of the release agent L1, and is connected to the relay pipe 32. The release agent port 37 is disposed at the lower end of the syringe 34 in the present embodiment. The release agent port 37 is continuous with the release agent container 38. The release agent container 38 is a portion in which the release agent L1 is stored. The upper limit position P1 of the release agent container 38 is set closer to the compressed air port 40. The upper limit position P1 is the highest position of the liquid surface L1a (upper surface) when the release agent L1 is sucked into the syringe 34.

  The lower limit position P4 of the release agent container 38 is set closer to the release agent port 37. The lower limit position P4 is the position of the liquid surface L1a at the completion of the discharge of the release agent L1 from the syringe 34 to the nozzle 16, and is the lowest position of the release agent L1 in the syringe 34. The lower limit position P4 is a position where the release agent L1 is always present at least at this position when no abnormality occurs in the release agent pump 30. As described above, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30 is as small as about 0.3 g. For this reason, the distance between the upper limit position P1 and the lower limit position P4 is as minute as about 10 several mm in practice. When the inner diameter D1 of the syringe 34 is 6.0 mm, the distance between the upper limit position P1 and the lower limit position P4 (liquid level fluctuation amount) is about 10 mm.

  The compressed air port 40 is a port through which compressed air as a working fluid passes, and is connected to the compressed air source 26 via, for example, a 90 degree elbow 41 and a regulator 35. The compressed air port 40 is disposed at the upper end of the syringe 34 in the present embodiment. The compressed air port 40 is continuous with the compressed air storage unit 39. The compressed air storage portion 39 is a portion in which the compressed air is stored. A portion of the compressed air storage portion 39 is also a release agent storage portion 38. The lower limit position of the compressed air storage portion 39 when the maximum amount of the release agent L1 is stored in the release agent storage portion 38 is the same as the upper limit position P1. The lower limit position of the compressed air storage unit 39 when the discharge operation of the release agent L1 from the release agent storage unit 38 to the nozzle 16 is completed is the same as the lower limit position P4.

  The regulator 35 is provided to adjust the pressure of the compressed air supplied from the compressed air source 26 into the syringe 34. The regulator 35 includes, for example, a pressure intensifying valve, an open valve for opening the compressed air to a predetermined amount, and an electromagnetic solenoid for opening and closing the open valve, and the compressed air is supplied by supplying a predetermined electrical signal. It is an electropneumatic regulator which alternatively performs an operation of adjusting the pressure of the compressed air from the source 26 and an operation of opening at least a part of the compressed air to the atmosphere. The regulator 35 is controlled by the control unit 19.

  The control unit 19 has a configuration for outputting a predetermined output signal based on a predetermined input signal, and can be formed using, for example, a programmable controller (PLC). The control unit 19 may be formed using a computer including a central processing unit (CPU), a random access memory (RAM), and a read only memory (ROM).

  The control unit 19 is configured to control the displacement operation of the nozzle 16 and the supply operation of the release agent L1 from the release agent pump 30 to the nozzle 16 (spray operation of the nozzle 16). The spray control of the release agent L1 from the nozzle 16 to the finishing mold portion 7 includes control of the spray amount itself from the nozzle 16, control of the rising and lowering speed of the nozzle 16 with the spray amount fixed, and the nozzle 16 It can carry out by control of the spray timing of the mold release agent L1. Of course, the desired application is possible even by on-off control of the spray of the release agent L1 from the nozzle 16.

  The control unit 19 is connected to the transport mechanism 15, the displacement mechanism 17, the on / off valve 33 of the release agent pump 30, and the regulator 35 for discharging the release agent. The transport mechanism 15 and the displacement mechanism 17 And control the release agent pump 30. The control unit 19 drives the electric motor of the conveyance mechanism 15 by giving a predetermined command signal to the conveyance mechanism 15, and arranges the conveyance mechanism 15, the nozzle 16 and the like at predetermined positions in the arrangement direction A1. Further, the control unit 19 drives the electric motor of the displacement mechanism 17 by giving a predetermined command signal to the displacement mechanism 17, and the nozzle 16 together with the tip of the displacement mechanism 17 is directed to the finish mold 7 to be sprayed. Displace.

  Further, the control unit 19 controls the regulator 35 to control the supply of the compressed air to the syringe 34 and the discharge of the compressed air from the syringe 34. Further, the control unit 19 controls the opening and closing operation of the on-off valve 33. Thus, the control unit 19 controls the supply of the release agent L1 from the release agent pump 30 to the nozzle 16.

  With the above-described configuration, when the release agent L1 is sucked into the syringe 34 of the release agent pump 30, the control unit 19 closes the on-off valve 33 and controls the regulator 35 to control the compressed air storage unit of the syringe 34. The air pressure in 39 is made lower than the pressure of the regulator 27 which is adjusting the internal pressure of the release agent tank 28 (the compressed air is released from the regulator 35). As a result, as shown in FIG. 5A, the compressed air in the compressed air storage 39 of the syringe 34 is released to the atmosphere through the regulator 35, and the volume of the compressed air in the syringe 34 is reduced. At this time, the release agent L 1 from the release agent tank 28 pushes up the valve body 31 a of the check valve 31 and enters the release agent accommodating portion 38 of the syringe 34 through the relay pipe 32. When the release agent L1 reaches the upper limit position P1, the control unit 19 controls the regulator 35 to adjust the air pressure in the compressed air storage unit 39 of the syringe 34 to the internal pressure of the release agent tank 28. Make the pressure higher than 27 (stop the release of compressed air from the regulator 35 to the atmosphere). Thereby, the valve body 31a of the check valve 31 is closed, and the inflow of the release agent L1 to the syringe 34 is stopped.

  Next, the control unit 19 opens the on-off valve 33, as shown in FIGS. 3 and 5B. As a result, the compressed air whose pressure is adjusted by the regulator 35 pushes the release agent L1 in the syringe 34. As a result, the release agent L1 reaches the nozzle 16 through the relay pipe 32, the on-off valve 33, the hose 36 and the manifold 22, and is sprayed from the spray port 16a. When the upper end position of the release agent L1 in the syringe 34 reaches the lower limit position P4, the control unit 19 closes the on-off valve 33. Thus, the spraying of the release agent L1 from the release agent pump 30 is completed.

  Referring to FIGS. 3 and 4, in order to detect the presence or absence of an abnormality in such a release agent spraying device 3, a release agent supply monitoring device 50 (hereinafter also referred to simply as monitoring device 50) is provided. ing.

  The release agent supply monitoring device 50 has a detection unit 51 and a control unit 19. That is, the control unit 19 is a control unit of the spray device 3 and also an element of the release agent supply monitoring device 50.

  The detection unit 51 is configured to detect the release agent L 1 in order to confirm the presence or absence of the spray abnormality of the release agent L 1 in the release agent spraying device 3. The detection unit 51 is installed in a release agent pump 30 that supplies a release agent to the nozzle 16.

  In the present embodiment, the detection unit 51 detects a change in volume of the release agent L1 in the syringe 34. More specifically, the detection unit 51 detects the presence or absence of the spray abnormality of the release agent L1 by detecting the change in the position of the liquid surface L1a of the release agent L1 in the release agent storage unit 38 of the syringe 34. Do.

  The detection unit 51 includes light sensors 52 and 53 that detect light. Each light sensor 52, 53 is fixed to the outer peripheral portion of the syringe 34. Each of the light sensors 52 and 53 has a light receiving unit. Each of the light sensors 52 and 53 outputs a signal corresponding to the intensity of light detected by the light receiving unit to the control unit 19 as a detection signal. The respective light sensors 52 and 53 only need to output a signal corresponding to the intensity of light detected by the light receiving unit as a detection signal, and the specific principle is not limited.

  The light sensor 52 is disposed at the upper detection position P2 near the upper limit position P1 and below the upper limit position P1, and when the release agent L1 is present at the upper detection position P2, the release agent L1 Different from when the upper detection position P2 is not present. The light sensor 53 is disposed near the lower limit position P4 and at the lower detection position P3 above the lower limit position P4, and when the release agent L1 is present at the lower detection position P3, Different detection signals are output when the agent L1 is not present at the lower detection position P3.

  Thus, the upper detection position P2 and the lower detection position P3 are disposed between the upper limit position P1 and the lower limit position P4 in the longitudinal direction of the syringe 34. This is a measure against the formation of a concave meniscus due to the interaction between the release agent L1 and the syringe 34 at the position of the liquid surface L1a which is the upper end of the release agent L1 in the syringe 34. By arranging the upper detection position P2 and the lower detection position P3 between the upper limit position P1 and the lower limit position P4, the influence of the meniscus due to the interaction between the release agent L1 and the syringe 34 can be avoided. As described above, at least a part (all in the present embodiment) of the syringe 34 has translucency. Therefore, the light sensors 52 and 53 detect the release agent L1 in a noncontact manner through the syringe 34 formed of the light transmitting portion.

  In addition, although this embodiment demonstrates the structure which detects the mold release agent L1 using the optical sensors 52 and 53, it may not be this. For example, a sensor such as a magnetic sensor, a thermal sensor, or the like having a detection signal that differs depending on the presence or absence of the release agent L1 may be used instead of the light sensors 52, 53.

  As an abnormality which arises with spraying device 3, the abnormalities which the spraying amount of mold release agent L1 from spray mouth 16a of nozzle 16 deviates from the value on design can be illustrated. As this abnormality, (1) Spraying caused by failure of the compressed air supply source 26, the on / off valve 33, the regulators 35, 27 and the check valve 31, or breakage of the mold release agent L1 or piping for compressed air, etc. (2) Change in spraying time due to malfunction of the on-off valve 33, (3) Change in release agent temperature (viscosity) due to change in air temperature, (4) Demolding due to clogging of the spray port 16a of the nozzle 16 The change of the spray area of the agent L1 can be illustrated.

  Then, the abnormality that occurs in the spray device 3 is detected by the monitoring device 50. More specifically, when an abnormality in the discharge of the release agent by the syringe 34 of the release agent pump 30 occurs, after the discharge operation of the release agent L1 by the release agent pump 30 is started, the liquid of the release agent L1 is It is conceivable that the surface L1a does not reach the lower detection position P3 within a predetermined time. In addition, when a mold release agent suction abnormality occurs by the syringe 34 of the mold release agent pump 30, after the suction operation of the mold release agent L1 by the mold release agent pump 30 starts, the liquid surface L1a of the mold release agent L1 is predetermined. It is conceivable that the upper detection position P2 is not reached in time. Further, after the suction operation, it is conceivable that the liquid surface L1a of the release agent L1 falls below the upper detection position P2 before the open / close valve 33 is opened (before the start of discharge). Therefore, in the present embodiment, the control unit 19 detects such an abnormality through the presence or absence of detection of the release agent L1 by the light sensors 52, 53.

  As described above, according to the present embodiment, when the detection unit 51 detects the release agent L1, it is possible to more accurately detect the spray abnormality related to the release agent L1 with high viscosity.

  Further, according to the present embodiment, the detection unit 51 detects a volume change of the release agent L1 in the syringe 34. According to this configuration, the detection unit 51 more accurately detects the spray abnormality of the release agent L1 by detecting the volume change of the release agent L1 as an element having a large change in the syringe 34 at the time of spraying the release agent. it can. More specifically, the detection unit 51 can detect a spray abnormality of the release agent L1 by detecting a change in volume of the release agent L1 in the release agent storage unit 38.

  Further, according to the present embodiment, the detection unit 51 detects the positional change of the liquid surface L1a of the release agent L1 in the release agent storage unit 38, thereby detecting the presence or absence of the spray abnormality of the release agent L1. According to this configuration, the detection unit 51 can detect a spraying abnormality of the release agent L1 with a simple configuration that detects a change in position of the liquid surface L1a of the release agent L1.

  Further, according to the present embodiment, the light sensors 52 and 53 of the detection unit 51 can detect the release agent L1 without contact. As a result, the release agent L1 with high viscosity does not stick to the light sensors 52, 53.

  Further, according to the present embodiment, the light sensors 52 and 53 detect the release agent L1 through the light transmitting portion of the syringe 34. According to this configuration, it is possible to more reliably prevent the light sensors 52 and 53 from coming into contact with the release agent L1. Moreover, it is not necessary to embed the light sensors 52 and 53 in the syringe 34, and the degree of freedom of the installation positions of the light sensors 52 and 53 on the syringe 34 can be further increased.

  Further, according to the present embodiment, the inner diameter D1 of the syringe 34 is set to 3.0 mm to 6.0 mm. When the inner diameter D1 of the syringe 34 is less than 3.0 mm, the release agent L1 remaining on the inner peripheral surface (wall surface) of the syringe 34 after ejection of the release agent L1 is stuck by surface tension to form a bridge (air Will be rolled up). If suction is performed in this state, the bridge portion is misidentified as the liquid surface L1a before the original liquid surface L1a comes to the upper limit detection position P2, and the syringe 34 can not absorb a predetermined amount, and quantitative determination at the next discharge It becomes impossible to discharge. In addition, when the inner diameter of the syringe 34 is less than 3.0 mm, the highly viscous release agent L1 adheres to the inner peripheral surface 34a of the syringe 34, and it is difficult to move smoothly in the syringe 34 It becomes easy to do. On the other hand, by setting the inner diameter of the syringe 34 to 3.0 mm or more, the flowability of the release agent L1 in the syringe 34 can be increased, and the smoothness of the release agent L1 in the syringe 34 accompanying the drive of the release agent pump 30. It is possible to realize smooth movement and to suppress the formation of a bridge after discharge. As a result, detection of the release agent L1 by the detection unit 51 can be performed more accurately. When the inner diameter D1 of the syringe 34 exceeds 6.0 mm, the change in the flow rate of the release agent L1 with respect to the change in the liquid surface of the release agent L1 in the syringe 34 becomes large. Therefore, the position of the liquid surface L1a of the mold release agent L1 when the mold release agent L1 is sucked into the syringe 34, and the liquid level L1a of the mold release agent L1 when the mold release agent L1 is discharged from the syringe 34. Change in the position of, becomes smaller. For this reason, it becomes difficult for detection part 51 to detect change of the state of mold release agent L1 correctly. That is, by setting the inner diameter D1 of the syringe 34 to 6.0 mm or less, the liquid level change of the release agent L1 in the syringe 34 accompanying the drive of the release agent pump 30 can be further increased. Thus, the detection unit 51 can detect the release agent L1 more accurately.

  In particular, the syringe 34 is made of PTFE, the inner diameter D1 of the syringe 34 is 3.0 mm to 6.0 mm, and the temperature measured by the B-type viscometer according to the ASTM-D2196 standard of the release agent L1 is 25 degrees. A combination having a viscosity of 1000 cps or less when the # 4 LV spindle is rotated for 30 seconds is preferable in terms of smooth flow of the release agent L1 and accurate detection of the release agent by the detection unit 51. Furthermore, when the spraying amount of the release agent L1 per one time is a very small amount of about 0.3 g, a suitable release agent supply monitoring device 50 can be realized.

  Further, according to the present embodiment, the critical surface tension of the inner circumferential surface 34 a of the release agent accommodating portion 38 of the syringe 34 is 30 mN / m or less. According to this configuration, the wettability of the release agent L1 to the inner circumferential surface 34a of the syringe 34 can be further lowered. Thus, the release agent L1 in the syringe 34 is transferred more smoothly as the release agent pump 30 is driven. Therefore, the state change detection of the mold release agent L1 by the detection part 51 can be performed more appropriately.

  Further, according to the present embodiment, in the path of the releasing agent L1 from the releasing agent tank 28 to the nozzle 16, the releasing agent L1 is temporarily stored in the syringe 34 branched from the path by the relay pipe 32, The detection unit 51 detects a change in flow rate in the syringe 34. According to this configuration, it is possible to reduce the amount of the release agent L1 in the syringe 34 with respect to the flow rate of the release agent L1 in the above path. As a result, the detection unit 51 can more accurately measure the spray amount of the release agent L1. For example, when the flow rate of the release agent L1 in the path of the release agent L1 from the release agent tank 28 to the nozzle 16 is directly measured without providing the branch path, the release agent relative to the measurement flow rate of the release agent L1. The volume of the release agent L1 in the tank 28 is large, and as a result, it is difficult to accurately measure the flow rate of the release agent.

  As described above, the release agent supply monitoring device 50 can more accurately detect the spray abnormality of the release agent L1. As a result, it is possible to detect the spray abnormality of the release agent L1 from the spray nozzle 16 to the finishing mold 7 more surely and earlier. As a result, it is possible to reduce the number of discards when a product failure occurs in the glass bottle 103 manufactured in each section 2. Thus, the yield of the glass bottle 103 can be further increased.

  The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the claims. In the following, differences from the above-described embodiment will be mainly described, and in the configuration similar to the above-described embodiment, the same reference numerals may be attached to the drawings and the detailed description may be omitted.

  (1) In the above-mentioned embodiment, the form which mold release agent L1 and compressed air touch directly in syringe 34 was explained to an example. However, this does not have to be the case. For example, as shown in FIG. 6, a block 55 may be provided in the syringe 34 to separate the release agent L1 from the compressed air. The block 55 is a cylindrical member having a cylindrical outer peripheral surface similar to the shape of the inner peripheral surface 34 a of the syringe 34. When the block 55 is made of metal (magnetic material), a magnetic sensor is installed at a place where the optical sensors 52, 53 are disposed instead of the optical sensors 52, 53, and a detection signal of this magnetic sensor is sent to the control unit 19. You may output it.

  (2) In the above-mentioned embodiment and modification, the detection part 51 explained the form which detects mold release agent L1 using a non-contact sensor as an example. However, this does not have to be the case. For example, referring to FIG. 7 which is a schematic side view of the mold release agent spraying device 3 according to still another modification, the mold release agent pump 30A is used instead of the mold release agent pump 30, and Instead of 50, the monitoring device 50A may be used. FIG. 8A is a view showing the main part of the modified example shown in FIG. 7, and shows a state where the piston 56 is located at the upper limit position P1A. FIG. 8B is a view showing the main part of the modified example shown in FIG. 7, and shows a state where the piston 56 is located at the lower limit position P4A.

  Referring to FIGS. 7, 8A and 8B, the mold release agent pump 30A includes a check valve 31, a relay pipe 32A, an open / close valve 33, a syringe 34A, and a piston 56. And a regulator 35.

  The relay pipe 32A is a pipe that connects the check valve 31, the syringe 34A, and the on-off valve 33, and is integrally molded with the syringe 34A in this modification. The check valve 31, the syringe 34A, and the on-off valve 33 are connected to the three ports of the relay pipe 32A, respectively.

  The syringe 34A selectively performs the operation of suctioning the release agent L1 by compressed air and the operation of discharging the release agent L1. The syringe 34A is a member formed in the shape of a hollow shaft, into which the releasing agent L1 and the compressed air are introduced. The syringe 34A is supplied with both high pressure compressed air and high pressure release agent L1. The state of the release agent L1 is monitored by the release agent supply monitor 50A for the syringe 34A. In the present embodiment, since the piston 56 is used to suck and discharge the release agent L1, the wettability of the inner circumferential surface 34aA of the syringe 34A does not pose a major problem. In the present embodiment, an L-shaped space is formed inside the syringe 34A.

  The syringe 34A includes a release agent port 37A, a release agent storage unit 38A, a compressed air storage unit 39A, and a compressed air port 40A.

  The release agent port 37A is a port through which the release agent L1 passes, and is connected to the relay pipe 32A. The release agent port 37A is disposed at the lower end of the syringe 34A in this embodiment. The release agent port 37A is continuous with the release agent container 38A. The release agent storage portion 38A is a portion in which the release agent L1 is stored. The upper limit position P1A of the release agent accommodating portion 38A is set closer to the compressed air port 40A. The upper limit position P1A is the highest position of the liquid surface position when the release agent L1 is sucked into the syringe 34A. The lower limit position P4A of the release agent accommodating portion 38A is set closer to the release agent port 37A. The lower limit position P4A is a liquid level position when discharge of the release agent L1 from the syringe 34A to the nozzle 16 is completed, and is the lowest position of the release agent L1 in the syringe 34A. As described above, the discharge amount of the release agent L1 in one release agent spraying operation of the release agent pump 30A is as small as about 0.3 g. For this reason, the distance between the upper limit position P1A and the lower limit position P4A is as minute as about several tens of millimeters.

  The compressed air port 40A is a port through which the compressed air passes, and is connected to the compressed air supply source 26 via the regulator 35. The compressed air port 40A is disposed on the side of the syringe 34A in the present embodiment. The compressed air port 40A is continuous with the compressed air storage portion 39A. The compressed air storage portion 39A is a portion in which the compressed air is stored.

  The piston 56 is a cylindrical member disposed in the syringe 34A. The piston 56 is moved in the advancing / retracting direction A2 along the axial direction of the syringe 34A by the compressed air as the working fluid, and the advancing / retracting movement sucks and discharges the release agent L1. The piston 56 receives compressed air from the regulator 35 and receives pressure from the release agent L1, and moves from the lower limit position P4A to the upper limit position P1A. The piston 56 is supplied with the compressed air from the regulator 35 to discharge the release agent L1 in the syringe 34A. Thus, the piston 56 is moved by the compressed air in the advancing / retracting direction A2 along the axial direction of the syringe 34A, and the advancing / retracting movement sucks and discharges the release agent L1.

  An annular seal member 57 such as an O-ring is attached to the outer peripheral portion of the piston 56, and the space between the outer peripheral portion of the piston 56 and the inner peripheral surface 34aA of the syringe 34A is sealed in a fluid tight and airtight manner. .

  In the syringe 34A, the piston 56 has its displaceable region regulated between the upper limit position P1A and the lower limit position P4A. Specifically, the upper limit stopper 58 and the lower limit stopper 59 are provided in the syringe 34A. The stoppers 58 and 59 restrict the displacement of the piston 56 in the advancing and retracting direction A2 to a predetermined range.

  The upper limit stopper 58 is installed at a position corresponding to the position of the piston 56 when the liquid surface of the release agent L1 reaches the upper limit position P1A. The upper limit stopper 58 is a small piece projecting from the inner peripheral surface 34aA of the syringe 34A, and is formed, for example, in an annular shape. The upper limit stopper 58 contacts the upper end surface 56 a of the piston 56 to restrict the piston 56 from being displaced upward.

  The lower limit stopper 59 is installed at a position corresponding to the position of the piston 56 when the liquid surface of the release agent L1 reaches the lower limit position P4A. The lower limit stopper 59 is a stepped portion that protrudes from the inner peripheral surface 34aA of the syringe 34A, and is formed, for example, in an annular shape. The lower limit stopper 59 contacts the lower end face 56 b of the piston 56 to restrict the piston 56 from being displaced downward.

  The drive control of the release agent pump 30A by the control unit 19 is the same as the drive control of the release agent pump 30 by the control unit 19.

  The release agent supply monitoring device 50A includes a detection unit 51A and a control unit 19.

  The detection unit 51A is configured to detect the release agent L1 in order to confirm the presence or absence of the spray abnormality of the release agent L1 in the spray device 3. The detection unit 51 </ b> A is installed in a release agent pump 30 </ b> A that supplies a release agent to the nozzle 16.

  In the present embodiment, the detection unit 51A detects a change in volume of the release agent L1 in the syringe 34A. More specifically, the detection unit 51A detects the position of the piston 56 in the advancing and retracting direction A2.

  The detection unit 51A has a displacement sensor 60. The displacement sensor 60 is installed on the syringe 34A. The displacement sensor 60 is a contact type displacement gauge. The displacement sensor 60 has a housing 61 and a movable probe 62 supported by the housing 61.

  The housing 61 is formed in an elongated shaft shape and is fixed to the upper end of the syringe 34A. The housing 61 accommodates a part of the needle-shaped probe 62. The movement range of the advancing / retreating direction A2 is regulated within a predetermined range by, for example, a stopper (not shown) provided in the housing 61, of the probe 62. A portion of the probe 62 protrudes from the housing 61 along the advancing and retracting direction A2. A through hole 34 b is formed at the upper end of the syringe 34 A, and the housing 61 and the probe 62 extend into the syringe 34 through the through hole 34 b. That is, at least a portion of the probe 62 is disposed in the syringe 34. The probe 62 is biased toward the piston 56 by a spring (not shown), and the tip of the probe 62 is configured to contact the upper end surface 56 a of the piston 56.

  In conjunction with the displacement of the piston 56 in the advancing and retracting direction A2, the probe 62 is also displaced integrally in the advancing and retracting direction A2. A detection signal corresponding to the position of the probe 62 with respect to the housing 61 is output from the displacement sensor 60 to the control unit 19. The resolution of the displacement sensor 60 is as high as about 1 μm, and as a result, minute nozzle clogging can also be detected. Then, when the piston 56 is displaced from the upper limit position P1A by a predetermined value Δx1 or more in the discharge direction A21 (downward direction) when the piston 56 discharges the release agent L1 in the advancing / retreating direction A2, the probe 62 It can be received by the provided stopper. Thus, the displacement of the probe 62 in the ejection direction A21 is restricted. That is, when the advancing displacement amount of the piston 56 at the time of discharge of the release agent L1 is equal to or more than the predetermined value Δx1, the probe 62 is released from the connection with the piston 56 and is maintained at a constant position.

  With the above-described configuration, the release agent pump 30A and the detection unit 51A differ from the release agent pump 30 and the detection unit 51 in that the detection power of the release agent L1 (the detection value is not affected by the viscosity of the release agent L1 Accuracy etc.) can be made higher. Further, since the diameter of the piston 56 can be made larger than the inner diameter D1 of the syringe 34 of the release agent pump 30, even if the amount of liquid level change in the release agent pump 30A and the amount of liquid level change in the release agent pump 30 are the same, The discharge amount of the release agent L1 in the release agent pump 30A can be further increased. As a result, the discharge amount of the release agent L1 that can be detected by the detection unit 51A can be made wider.

  In the present embodiment, the upper limit position P1A and the upper detection position P2A are set to be the same in the advancing and retracting direction A2. This is because the lower end face 56b of the piston 56 is always kept flat unlike the liquid surface of the mold release agent L1, so that the meniscus is formed by the interaction between the mold release agent L1 and the syringe 34A. It is because there is no need to consider. On the other hand, the lower detection position P3A is disposed at a position advanced from the lower limit position P4A by the upper limit position P1A side Δx2. This is because if the displacement of the probe 62 is large, the amount of change of the output from the displacement sensor 60 with respect to the displacement of the probe 62 becomes large and the position detection accuracy is lowered. By limiting the amount of displacement. When the piston 56 is at the lower limit position P4A, a predetermined gap Δx2 is made between the probe 62 and the piston 56.

  In the present embodiment, although the configuration for detecting the displacement of the piston 56 using the displacement sensor 60 will be described, this may not be the case. For example, a sensor such as a magnetic sensor or an optical sensor, which has a structure in which a detection signal differs depending on the displacement of the piston 56 may be used instead of the displacement sensor 60.

  An abnormality occurring in the spray device 3 is detected by the monitoring device 50A. More specifically, in the case where ejection failure of the mold release agent by the syringe 34A of the mold release agent pump 30A occurs, the lower end surface of the piston 56 is started after the discharge operation of the mold release agent L1 by the mold release agent pump 30A. It is conceivable that 56b does not reach the lower detection position P3A within a predetermined time. In addition, when a mold release agent suction abnormality is caused by the syringe 34A of the mold release agent pump 30A, the lower end surface 56b of the piston 56 is within a predetermined time after the start of the suction operation of the mold release agent L1 by the mold release agent pump 30A. It is conceivable that the upper detection position P2A is not reached. Therefore, in the present modification, the control unit 19 detects such an abnormality.

  As described above, according to this modification, since the piston 56 is provided, the syringe 34A including the releasing agent L1 near the inner peripheral surface 34aA (wall surface) of the syringe 34A along with the movement of the piston 56. The entire mold release agent can be transferred smoothly.

  Further, according to this modification, by detecting the movement of the piston 56, the detection unit 51A can more accurately detect whether or not the release agent L1 is discharged from the syringe 34A as set.

  Further, according to this modification, the detection unit 51A can detect the movement of the piston 56, that is, the spray state of the release agent L1 through the displacement of the probe 62.

  Further, according to this modification, the probe 62 is released from the connection with the piston 56 and maintained at the constant position P3A when the amount of advance displacement of the piston 56 at the time of discharge of the release agent L1 is equal to or larger than the predetermined value Δx1. . According to this configuration, the tolerance of the movement amount of the probe 62 may be less than the maximum movement amount of the piston 56. Therefore, the sensitivity of the probe 62 (the gain of the output of the probe 62 with respect to the movement of the piston 56) can be increased. Thereby, the detection unit 51A can more accurately detect the change in the state of the release agent L1 in the syringe 34.

  Further, according to this modification, at least a part of the probe 62 is accommodated in the syringe 34A. According to this configuration, the probe 62 is protected by the syringe 34A. Therefore, when the probe 62 contacts the foreign matter, it can be more reliably suppressed that the detection value at the detection unit 51A becomes an abnormal value.

  Further, according to this modification, stoppers 58 and 59 are provided for restricting the displacement of the piston 56 in the advancing and retracting direction A2 to a predetermined range. According to this configuration, the amount of movement of the piston 56 does not become too large. For this reason, the allowable value of the movement amount of the probe 62 may be small. Therefore, the sensitivity of the probe 62 can be increased. Thus, the detection unit 51A can more accurately detect the change in the state of the release agent L1 in the syringe 34A. In addition, when the piston 56 sucks more than the set value due to pressure abnormality in the syringe 34A or the like, damage to the detection unit 51A can be prevented.

  Further, according to this modification, since the probe 62 is disposed at a place where the release agent L1 is not present, the detection operation by the displacement sensor 60 can be performed in a state in which the probe 62 is not easily affected by the viscosity of the release agent L1. it can.

  (3) Moreover, in the above-mentioned embodiment and modification, the heater for heat retention may be provided in the passage etc. which mold release agent L1 passes among spray devices 3. The heater may be an electric heater or may include a heat insulating material. By providing the heater, for example, the temperature of the release agent L1 in the winter can be maintained at a certain level or more. Thereby, it can suppress that the viscosity of mold release agent L1 becomes high too much. Therefore, clogging of the release agent L1 with the nozzle 16 or the like, that is, occurrence of a spraying abnormality of the release agent L1 can be more reliably suppressed.

  INDUSTRIAL APPLICABILITY The present invention can be widely applied as a release agent supply monitoring device and a release agent spraying device to a glass bottle molding die.

3 mold release agent spraying device 5 rough mold part (mold)
Six-part mold part (mold)
7 Finishing mold part (mold)
16 Spray nozzle 30, 30A Release agent pump (pump)
34, 34A Syringe 34a Inner peripheral surface 38, 38A Release agent storage 40, 40A Compressed air port (port through which working fluid passes)
50, 50A mold release agent supply monitoring device 51, 51A detection unit 52, 53 light sensor 56 piston 58, 59 stopper 62 probe 103 glass bottle (glass molded article)
A2 Direction of movement D1 Inner diameter of syringe L1 Release agent

Claims (15)

A detection unit for detecting the mold release agent in order to confirm the presence or absence of a spray abnormality of the mold release agent in a mold release agent spraying device for spraying a mold release agent onto a glass bottle molding die,
A release agent supply monitoring device comprising: The mold release agent supply monitor according to claim 1, wherein
The detection unit is installed in a pump that supplies the release agent to a spray nozzle of the release agent spraying device.
The pump includes a syringe performing an operation of suctioning the release agent by a working fluid and an operation of discharging the release agent.
The release agent supply monitoring device, wherein the detection unit detects a change in volume of the release agent in the syringe. The mold release agent supply monitor according to claim 2, wherein
The release agent supply monitor according to claim 1, wherein the syringe has a port through which the working fluid passes, and a release agent storage unit in which the release agent is stored. The mold release agent supply monitor according to claim 3, wherein
The detection unit is characterized by detecting the presence or absence of a spray abnormality of the release agent by detecting a change in the liquid surface position of the release agent in the release agent storage unit. Monitoring device. The mold release agent supply monitor according to any one of claims 2 to 4, wherein
The release agent supply monitoring device, wherein the detection unit includes an optical sensor that detects light. The mold release agent supply monitor according to claim 5, wherein
The syringe includes a light transmitting portion,
The release agent supply monitoring device, wherein the light sensor detects the release agent through the light transmitting portion. The mold release agent supply monitor according to any one of claims 2 to 6, wherein
The release agent supply monitoring device, wherein an inner diameter of the syringe is 3.0 mm to 6.0 mm. The mold release agent supply monitor according to any one of claims 2 to 7, wherein
The syringe has a port through which the working fluid passes, and a release agent storage unit in which the release agent is stored.
The release agent supply monitoring device, wherein a critical surface tension of the inner peripheral surface of the release agent storage portion of the syringe is 30 mN / m or less. The mold release agent supply monitor according to any one of claims 2 to 4, wherein
The pump has a piston disposed in the syringe,
The release agent supply monitoring device, wherein the piston moves in an advancing and retreating direction along the axial direction of the syringe by the working fluid, and sucks and discharges the releasing agent by the advancing and retreating movement. 10. The mold release agent supply monitor according to claim 9, wherein
The release agent supply monitoring device, wherein the detection unit detects the position of the piston in the advancing and retracting direction. 11. The mold release agent supply monitor according to claim 10, wherein
The release agent supply monitoring device, wherein the detection unit includes a probe that is displaced in the advancing and retracting direction in conjunction with the advancing and retracting movement of the piston. 12. The mold release agent supply monitor according to claim 11, wherein
The release agent supply is characterized in that the probe is released from the connection with the piston and maintained at a predetermined position when the displacement amount of the piston at the time of discharging the release agent is equal to or more than a predetermined value. Monitoring device. The mold release agent supply monitor according to claim 11 or 12, wherein
A release agent supply monitoring device, wherein at least a part of the probe is accommodated in the syringe. The release agent supply monitoring device according to any one of claims 9 to 13, wherein
A release agent supply monitoring device, further comprising a stopper for restricting displacement of the piston in a forward and backward direction to a predetermined range. The release agent supply monitoring device according to any one of claims 1 to 14,
A pump for supplying the release agent;
A spray nozzle for spraying a release agent discharged from the pump;
A release agent spraying device for a glass bottle molding die, comprising:

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