JP2005161339A - Automatic molten metal feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently absorb vibrations of a molding apparatus without using a large-scale apparatus to prevent a load on a hot water supply pipe and a hot water supply apparatus, and prevent damage to the hot water supply pipe and the hot water supply apparatus and leakage of molten metal to the outside. To do.
SOLUTION: In an automatic molten metal supply apparatus A that automatically supplies a fixed amount of molten metal M in a holding furnace 1 to a forming apparatus B through a hot water supply pipe 22 by a hot water supply apparatus 2, the hot water supply apparatus 2 is placed in the holding furnace 1. Suspended and supported so as to be movable in the dimension direction.
[Selection] Figure 1

Description

  The present invention relates to an automatic molten metal supply apparatus that automatically supplies a molten metal of non-ferrous metal such as an aluminum alloy from a holding furnace for melting metal to a forming apparatus by a hot water supply apparatus through a hot water supply pipe.

  2. Description of the Related Art Conventionally, as an automatic molten metal supply apparatus that automatically supplies molten metal from a holding furnace to a molding apparatus, an electromagnetic type or a float type is known. In these automatic molten metal supply apparatuses, in order to supply molten metal from a holding furnace to a molding apparatus, a hot water supply apparatus in the holding furnace and the molding apparatus are connected by a hot water supply pipe made of metal, ceramic, or the like (for example, Patent Document 1). reference).

  However, in this Patent Document 1, since the hot water supply pipe and the hot water supply device are fixed to the holding furnace, the vibration of the molding device generated during casting is directly transmitted to the hot water supply pipe and the hot water supply device, and loads are applied to these hot water supply pipes and the hot water supply device. Will cause cracks, or misalignment will occur at the connecting portion and the molten metal will leak out.

  As a countermeasure, an automatic molten metal supply apparatus in which a holding furnace and a molding apparatus are connected by a connecting member having a length adjusting mechanism has been developed (for example, see Patent Document 2). The connecting member is formed by inserting a connecting rod into a cylindrical connecting rod receiver so as to be movable. A roller that moves on the rail is disposed on the lower surface of the holding furnace. As a result, the entire holding furnace can be moved in the horizontal direction by the roller.

  In addition, an automatic molten metal supply device has been developed in which a hot water supply device is suspended from a rail provided above a holding furnace and is movable in a horizontal direction along the rail (for example, see Patent Document 3).

By the way, when the molten metal is supplied to the molding apparatus through the hot water supply pipe, the hot water supply pipe is thermally changed from room temperature to high temperature (molten metal temperature + 200 ° C.) and repeatedly expands and contracts. It receives vibration due to the impact of mold opening and injection. Hot water pipes are vulnerable to these thermal deformations and vibrations and can be damaged.
Japanese Patent Laid-Open No. 05-123848 JP 08-281411 A Japanese Patent Laid-Open No. 11-291016

  However, in the automatic molten metal supply apparatus of the above-mentioned Patent Document 2, since it is necessary to move the entire holding furnace, a large-scale moving apparatus is required, and the equipment cost is increased.

  Moreover, in this automatic molten metal supply apparatus, although there is a countermeasure against the thermal expansion load of the hot water supply pipe, no countermeasure against vibration is taken into consideration. That is, since the distance between the holding furnace and the molding apparatus is variable, even if the hot water pipe connecting the two expands due to the heat of the molten metal, the load is not applied by this. The moving direction of the molding apparatus is only in the horizontal direction, which is the connection direction with respect to the molding apparatus. Therefore, the vibration of the molding apparatus can only deal with the horizontal vibration and absorbs the vibration in the vertical direction. It is not possible to prevent breakage of the hot water supply pipe and the hot water supply device and leakage of the molten metal to the outside. Further, even horizontal vibrations are insufficient for small vibrations of the molding apparatus.

  Since the automatic molten metal supply apparatus of said patent document 3 can also move only to a horizontal direction, there exists a problem similar to the case of patent document 2. FIG.

  The present invention has been made in view of the above points, and an object of the present invention is to efficiently absorb the vibration of the molding apparatus without using a large-scale apparatus and prevent the hot water supply pipe and the hot water supply apparatus from being loaded. It is to prevent the hot water supply pipe and the hot water supply device from being damaged and the molten metal from leaking to the outside.

  In order to achieve the above object, the present invention is characterized in that the support structure of the hot water supply apparatus is devised.

  Specifically, the present invention is directed to an automatic molten metal supply device that automatically supplies a molten metal in a holding furnace through a hot water supply pipe to a forming device through a hot water supply pipe, and has taken the following solution. .

  That is, the invention described in claim 1 is characterized in that the hot water supply device is suspended and supported in the holding furnace so as to be movable in a three-dimensional direction.

  According to a second aspect of the present invention, in the first aspect of the present invention, the hot water supply apparatus includes a hot water supply portion having a hot water supply cylinder in which a hot water supply piston is inserted so as to be able to advance and retract and is always immersed in the molten metal in the holding furnace, In the hot water supply section, a molten metal passage having one end connected to the hot water supply pipe and the other end connected to the hot water supply cylinder, and a molten metal introduction passage connected to the molten metal passage in the middle of the molten metal passage to guide the molten metal in the holding furnace to the molten metal passage. And is provided.

  According to a third aspect of the present invention, in the second aspect of the present invention, the hot water supply piston is detachably connected to the hot water supply piston driving device attached to the support portion above the holding furnace. Features.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the molten metal passage is provided with a remaining hot water discharge portion that communicates with the holding furnace.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, the molten metal passage includes a first passage extending obliquely downward from a connecting end portion of the hot water supply pipe and a molten metal extending upward from a lower end of the first passage. A second passage connected to the introduction passage and a third passage extending obliquely upward from the upper end of the second passage and connected to the hot water supply cylinder are provided with a remaining hot water discharge portion at the lower end portion of the first passage. It is characterized by being.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, in the second passage, the molten metal introduction passage and the third passage are communicated with each other by a lowering operation and the first passage and the third passage are shut off. On the other hand, a tap valve that allows the first passage and the third passage to communicate with each other by an ascending operation and that shuts off the molten metal introduction passage and the third passage is provided to be movable up and down.

  The invention according to claim 7 is the invention according to claim 6, wherein the tap valve is detachably connected to the tap valve driving device attached to the support part above the holding furnace from the second passage. It is characterized by.

  The invention according to claim 8 is the invention according to claim 7, wherein the tap valve and the tap valve driving device are connected by a shaft, and the upper end of the molten metal introduction path projects upward from the molten metal surface in the holding furnace. Thus, the lower end of the cylindrical filter is connected, and the shaft is inserted and disposed in the filter with a gap therebetween.

  The invention according to claim 9 is the invention according to claim 8, wherein the upper end of the filter is supported on the support portion side.

  The invention described in claim 10 is the invention described in any one of claims 2 to 9, wherein the hot water supply portion is made of graphite.

  According to an eleventh aspect of the present invention, in the invention according to any one of the second to tenth aspects, the hot water supply portion is supported on the support portion by a plurality of ceramic columns.

  According to the first aspect of the present invention, even if the vibration of the molding apparatus is transmitted to the hot water supply pipe and the hot water supply apparatus, the hot water supply apparatus is suspended and supported so as to be movable in a three-dimensional direction with respect to the holding furnace. Can be efficiently absorbed to prevent the hot water supply pipe and the hot water supply device from being damaged, and the leakage of the molten metal to the outside can be reliably prevented. Moreover, the large horizontal movement apparatus like patent document 2 and 3 is unnecessary, and a relatively compact installation may be sufficient, and an installation cost can be reduced.

  According to the invention which concerns on Claim 2, since a molten metal channel | path and a hot water supply cylinder are always immersed in the molten metal, a molten metal can be supplied stably. In particular, if the upper end of the hot water supply cylinder protrudes from the hot water surface and is in contact with the atmosphere, oxide may accumulate on the boundary between the molten metal and the air, which may be an obstacle when the hot water supply piston is pulled out for maintenance or the like. Since the hot water supply cylinder is always immersed in the molten metal, there is no accumulation of oxide as described above, and the hot water supply piston can be smoothly extracted. Moreover, since the molten metal introduction path is always immersed in the molten metal, foreign matters such as oxides in the upper layer of the molten metal and deposits in the lower layer of the molten metal are not sucked.

  According to the third aspect of the present invention, the hot water supply piston can be removed from the hot water supply cylinder by largely moving the hot water supply piston upward, so that the hot water supply piston can be easily and smoothly removed from the hot water supply portion. Therefore, when removing the hot water supply part from the holding furnace for maintenance or the like, the hot water supply piston can be easily removed from the hot water supply part first, so the thermal contraction rate differs depending on the material etc. However, it is possible to prevent the hot water supply piston and the hot water supply section from being damaged by the difference in contraction.

  According to the invention which concerns on Claim 4, when taking out a hot-water supply part from a holding furnace by maintenance etc. of a hot-water supply apparatus, since the molten metal in a hot-water supply part can be discharged | emitted from a residual hot-water discharge part in a holding furnace, in a hot-water supply part It is possible to prevent the molten metal from remaining and solidifying.

  According to the invention which concerns on Claim 5, since the molten metal in the 1st-3rd channel | path is discharged | emitted in a holding furnace from the remaining hot metal discharge part of the 1st channel | path lower end part which is the lowest part, the remaining of the molten metal in a hot water supply part Solidification can be reliably prevented. In addition, since the second passage and the molten metal introduction passage communicate with each other in a vertical direction, a single passage can be used as both passages and have a simple structure.

  According to the invention which concerns on Claim 6, the communication state of the 1st-3rd channel | path can be switched by simple operation of the up-and-down movement of a tap valve.

  According to the seventh aspect of the present invention, the tap valve can be removed from the second passage by largely moving the tap valve upward, so that the tap valve can be easily and smoothly removed from the hot water supply section. Therefore, when removing the hot water supply part from the holding furnace for maintenance or the like, the tap valve can be easily removed from the hot water supply part first, so the thermal contraction rate differs depending on the material of the tap valve and the hot water supply part. However, it is possible to prevent the tap valve and the hot water supply portion from being damaged by the difference in contraction.

  According to the eighth aspect of the present invention, foreign matters such as impurities adhering to the filter can be removed by the molten metal backflow generated with the upward movement of the tap valve and the advance operation of the hot water supply piston. The running cost can be reduced by reducing the number of replacements.

  According to the ninth aspect of the present invention, since the lower end of the filter is held by the hot water supply unit and the upper end is held by the support unit, the mounting posture of the filter can be stabilized. Moreover, since the filter can be removed from the hot water supply part by removing the upper end of the filter from the support part side, the filter can be easily replaced while leaving the hot water supply part in the holding furnace. Further, since the filter protrudes upward from the surface of the hot water in the holding furnace, the molten metal in the holding furnace always passes through the filter and is sucked into the hot water supply cylinder, and foreign matters such as oxides and impurities in the molten metal enter the hot water supply cylinder. The situation of being sucked can be surely prevented.

  According to the invention which concerns on Claim 10, since a hot water supply part consists of graphite, processing of a molten metal channel | path, a molten metal introduction path, a remaining hot metal discharge | emission part, etc. can be performed easily.

  According to the invention which concerns on Claim 11, since the support | pillar which supports a hot-water supply part is a product made from a ceramic, durability with respect to a molten metal can be improved.

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

  1 to 3 show an automatic melt feeder A according to an embodiment of the present invention. 1-3, 1 is a holding furnace for holding a molten metal M of a non-ferrous metal such as an aluminum alloy, and 2 is a hot water supply apparatus. The holding furnace 1 is provided with an upper lid 3 having an opening 3 a, and the hot water supply device 2 is connected to a first support frame 4 erected on the upper lid 3 via a shaft 5, a universal joint 6 and a spring member 7. The lower hot water supply unit 8 that is the main body of the hot water supply device 2 is always dipped in the molten metal M in the holding furnace 1.

  Therefore, even if the vibration of the forming apparatus B is transmitted to the hot water supply device 2 through the hot water supply pipe 22 described later, the vibration is efficiently absorbed by the movement of the hot water supply device 2 in the three-dimensional direction, so that the hot water supply pipe 22 and the hot water supply device 2 are It can be prevented from being damaged, and the molten metal M can be reliably prevented from leaking to the outside. Moreover, since only the hot water supply device 2 is suspended, the installation of a large horizontal movement device is eliminated, and a relatively compact facility is sufficient, and the facility cost can be reduced.

  The hot water supply device 2 includes the hot water supply unit 8 and an upper drive unit 9, and the drive unit 9 is disposed on the plate 10 disposed corresponding to the opening 3 a of the upper lid 3, and the upper surface of the plate 10. The second support frame 11 is connected, and the shaft 5 is fitted into the second support frame 11 so that the second support frame 11 is suspended and supported by the first support frame 4. The second support frame 11 is provided with a hot water supply piston drive device 12 and a tap valve drive device 13. The hot water supply piston drive device 12 includes an electric cylinder 14 having a rod 14a extending downward, and an upper end of a shaft 15 is connected to the lower end of the rod 14a. The shaft 15 passes through the first through hole 10a of the plate 10. Then, it is immersed in the molten metal M in the holding furnace 1, and a ceramic hot water supply piston 16 is integrally attached to the lower end. Thereby, the hot water supply piston 16 is connected to the electric cylinder 14 of the hot water supply piston drive device 12 via the shaft 15. On the other hand, the tap valve driving device 13 also includes a fluid pressure cylinder 17 having a rod 17a extending downward, shafts 18 and 19 are connected to the lower end of the rod 17a, and the lower shaft 19 is the second of the plate 10. The ceramic tap valve 20 is integrally attached to the lower end through the through hole 10b and immersed in the molten metal M in the holding furnace 1.

  On the other hand, as shown in FIG. 3, the hot water supply section 8 has a substantially pentagonal shape in plan view and is made of graphite. Ceramic pillars 21 made of pipe material are erected at three corners, respectively. The upper end of the column 21 passes through the third through hole 10 c of the plate 10 and is fixed to the upper surface of the plate 10, and the hot water supply unit 8 is supported by the plate 10 as a support unit by the three columns 21. One end of a hot water supply pipe 22 is connected to the hot water supply section 8. The connecting point is a position that forms a rectangular apex with the three columns 21, and the hot water supply pipe 22 penetrates the fourth through hole 10 d of the plate 10 and is fixed to the upper surface of the plate 10, and also functions as a column. The three water columns 21 and the hot water supply pipe 22 support the hot water supply unit 8.

  Thereby, since one support | pillar can be abbreviate | omitted, it can be set as a compact layout. In addition, since the hot water supply section 8 is made of graphite, a molten metal passage 24, a molten metal introduction path 26, a remaining molten metal discharge section 30, and the like described later can be easily formed. Furthermore, since the support column 21 that supports the hot water supply unit 8 is made of ceramic, durability against the molten metal M can be improved.

  A hot water supply cylinder 23 that is constantly immersed in the molten metal M in the holding furnace 1 is provided at the approximate center surrounded by the three support columns 21 and the hot water supply pipe 22 of the hot water supply unit 8. The hot water supply piston 16 is inserted so as to be able to advance and retract in the vertical direction by the operation of the hot water supply piston drive device 12 (electric cylinder 14).

  As described above, by arranging the hot water supply cylinder 23 and the hot water supply piston 16 at substantially the center of the hot water supply portion 8, the hot water supply portion 8 can be stably supported against pressurization by the advance operation of the hot water supply piston 16.

  The hot water supply piston 16 can be removed from the hot water supply cylinder 23 by increasing the amount of operation of the hot water supply piston drive device 12 (electric cylinder 14) during maintenance or the like.

  Therefore, when removing the hot water supply unit 8 from the holding furnace 1 for maintenance or the like, the hot water supply piston 16 can be easily and smoothly removed from the hot water supply unit 8 first, so that the hot water supply piston 16 and the hot water supply unit 8 are different in material and the like. Even if the thermal contraction rate differs, it is possible to prevent the hot water supply piston 16 and the hot water supply section 8 from being damaged by the difference in contraction.

  The hot water supply section 8 is formed with a molten metal passage 24 having one end connected to the hot water supply pipe 22 and the other end connected to the hot water supply cylinder 23. In the middle of the molten metal passage 24, the valve cylinder 25 is inserted extending in the vertical direction at a position corresponding to the apex of the pentagonal shape of the hot water supply section 8, and a communication hole 25 a is formed in the middle of the valve cylinder 25. And a valve seat 25b on which the tap valve 20 is seated are formed at the lower end. Thus, the upper half of the inside of the valve cylinder 25 is used as a molten metal introduction path 26 that guides the molten metal M in the holding furnace 1 to the molten metal path 24, and the molten metal introduction path 26 is connected to the molten metal path 24. The molten metal passage 24 includes a first passage 27 extending obliquely downward from the connecting end of the hot water supply pipe 22, and a second passage 28 extending upward from the lower end of the first passage 27 and connected to the lower end of the molten metal introduction passage 26. And a third passage 29 extending obliquely upward from the upper end of the second passage 28 and connected to the hot water supply cylinder 23. Therefore, the second passage 28 is constituted by the lower half portion of the cylindrical member 25. In addition, a remaining hot water discharge unit 30 communicating with the inside of the holding furnace 1 is opened at a lower end portion of the first passage 27 corresponding to the lower side of the second passage 28, and the remaining hot water discharge unit 30 is normally closed by a plug 31. ing. The remaining hot water discharge unit 30 does not have to be opened from the beginning, and may be closed with a plug after being drilled to discharge the molten metal during maintenance or the like.

  Thus, since the molten metal channel | path 24 and the hot water supply cylinder 23 are always immersed in the molten metal M, the molten metal M can be supplied stably. In particular, if the upper end portion of the hot water supply cylinder 23 protrudes from the hot water surface and comes into contact with the atmosphere, oxides accumulate on the boundary portion between the molten metal M and the air, which may be an obstacle when the hot water supply piston 16 is pulled out for maintenance or the like. However, since the hot water supply cylinder 23 is always immersed in the molten metal M, the hot water supply piston 16 can be smoothly pulled out without the accumulation of oxide as described above. Moreover, since the molten metal introduction path 26 is always immersed in the molten metal M, it is possible to prevent a situation in which foreign matters such as oxides in the upper layer portion of the molten metal and deposits in the lower layer portion of the molten metal are sucked. Further, when the hot water supply unit 8 is taken out of the holding furnace 1 for maintenance of the hot water supply device 2 or the like, the molten metal M in the hot water supply unit 8 (first to third passages 27 to 29) is transferred to the remaining hot water discharge portion at the lower end of the first passage 27. Since it can discharge | emit into the holding furnace 1 from 30, the situation where the molten metal M remains in the hot water supply part 8 and solidifies can be prevented. Further, the structure can be simplified by using the second passage 28 and the molten metal introduction passage 26 as one passage.

  A shaft 19 that connects the tap valve driving device 13 (fluid pressure cylinder 17) and the tap valve 20 passes through the molten metal introduction passage 26, and the tap valve 20 enters the second passage 28 in the tap valve driving device 13 (fluid pressure). The cylinder 17) is arranged so that it can be moved up and down. Then, the tap valve 20 is lowered to connect the molten metal introduction passage 26 and the third passage 29 and to shut off the first passage 27 and the third passage 29, while the tap valve driving device 13 is raised to raise the first passage. The first passage 27 and the third passage 29 are communicated with each other, and the molten metal introduction passage 26 and the third passage 29 are blocked. The tap valve 20 can also be removed from the second passage 28 by increasing the operation amount of the tap valve driving device 13 (fluid pressure cylinder 17) during maintenance or the like.

  Therefore, the communication state of the first to third passages 27 to 29 can be switched by a simple operation of moving the tap valve 20 up and down. Furthermore, since the tap valve 20 can be removed from the second passage 28 by largely moving the tap valve 20 upward, the tap valve 20 can be easily and smoothly removed from the hot water supply unit 8. Therefore, when removing the hot water supply unit 8 from the holding furnace 1 for maintenance or the like, the tap valve 20 can be easily removed from the hot water supply unit 8 first, so that the tap valve 20 and the hot water supply unit 8 are heated due to a difference in material or the like. Even if the shrinkage rates are different, it is possible to prevent the tap valve 20 and the hot water supply unit 8 from being damaged by the shrinkage difference.

  The lower end of a ceramic cylindrical filter 32 is connected to the molten metal introduction path 26 so that the upper end protrudes upward from the molten metal surface in the holding furnace 1, and the shaft 19 is surrounded by the filter 32. It is inserted and arranged with a gap. The upper end of the filter 32 is supported by the plate 10 on the support portion side.

  Therefore, foreign matters such as impurities adhering to the filter 32 can be removed by the molten metal backflow generated with the upward movement of the tap valve 20 and the advance operation of the hot water supply piston 16, so the number of replacements of the filter 32 due to clogging can be reduced. This can reduce the running cost. Furthermore, since the lower end of the filter 32 is held by the hot water supply unit 8 and the upper end is held by the plate 10, the mounting posture of the filter 32 can be stabilized. Moreover, since the filter 32 can be removed from the hot water supply unit 8 by removing the upper end of the filter 32 from the plate 10, the filter 32 can be easily replaced while the hot water supply unit 8 remains in the holding furnace 1. Further, since the filter 32 protrudes upward from the molten metal surface in the holding furnace 1, the molten metal M in the holding furnace 1 always passes through the filter 32 and is sucked into the hot water supply cylinder 23, and oxides and impurities in the molten metal M are present. It is possible to reliably prevent a foreign matter such as the like from being sucked into the hot water supply cylinder 23.

  The other end of the hot water supply pipe 22 protrudes upward from the plate 10 and is connected to the injection sleeve b1 of the molding apparatus B. Thereby, the hot water supply unit 8 of the hot water supply apparatus 2 is connected to the molding apparatus B through the hot water supply pipe 22, and the molten metal M in the holding furnace 1 is fixed to the injection sleeve b 1 of the molding apparatus B through the hot water supply pipe 22 by the hot water supply apparatus 2. The injection plunger b2 is advanced by an operating device (not shown) and injected into a cavity b6 of a mold b5 composed of a fixed mold b3 and a movable mold b4.

  The molten metal M in the holding furnace 1 decreases as the number of shots increases, and the molten metal level decreases. To monitor this, the upper surface of the upper lid 3 of the holding furnace 1 detects the molten metal level in the furnace. A hot water surface height measuring device 33 as a hot water surface detecting device is inserted and installed in the through hole 3b of the upper lid 3, and the hot water surface height measuring device 33 has a lower end detection rod 33a in the through hole 3b. The tip is inserted into the furnace.

  Next, the operation of the automatic molten metal supply apparatus A configured as described above will be described with reference to the operation process diagram of FIG.

  (1) As shown in FIG. 4A, the tap valve 20 is in the lower end position, the molten metal introduction path 26 and the third path 29 are communicated, and the first path 27 and the third path 29 are blocked. . In this state, the electric cylinder 14 of the hot water supply piston driving device 12 is contracted to raise the hot water supply piston 16. By this operation, the molten metal M in the holding furnace 1 is sucked into the hot water supply cylinder 23 through the filter 32, the molten metal introduction path 26, the second passage 28 and the third passage 29. At this time, the stroke amount of the hot water supply piston 16 is set so as to be retracted to an upper position where the molten metal M is supplied to the molding apparatus B so as to be sucked into the hot water supply cylinder 23.

  (2) As shown in FIG. 4B, the electric cylinder 14 is extended, and the hot water supply piston 16 is lowered to a predetermined position so as to supply a set amount of hot water 5 to the molding apparatus B. Is returned to the holding furnace 1. By this operation, the molten metal M corresponding to the capacity of the cavity b5 is stably secured without variation.

  (3) As shown in FIG. 4C, the second fluid pressure cylinder 17 is contracted to move the tap valve 20 upward. Thereby, the molten metal introduction path 26 and the 3rd channel | path 29 are interrupted | blocked, the 1st-3rd channel | paths 27-29 are connected, and the hot water supply system is prepared.

  (4) As shown in FIG. 4 (d), the first fluid pressure cylinder 14 is extended to lower the hot water supply piston 16. Thereby, the molten metal M is supplied to the injection sleeve b1 of the molding apparatus B through the hot water supply pipe 22.

  (5) As shown in FIGS. 4E and 4F, the injection plunger b2 is advanced to inject the molten metal M in the injection sleeve b1 into the cavity b6 of the mold b5. Further, when the injection plunger b2 passes through the hot water supply pipe connection portion (melt supply port) of the injection sleeve b1, the electric cylinder 14 is contracted to raise the hot water supply piston 16 slightly, and the molten metal M in the hot water pipe 22 is A part is returned to the hot water supply unit 8. This operation is for ensuring the volume of the volume when the tap valve 20 moves downward and the molten metal M in the second passage 28 is pushed out to the hot water supply pipe 22 in the next stroke.

  (6) As shown in FIG. 4 (f), the fluid pressure cylinder 17 is extended to move the tap valve 20 downward. As a result, the first passage 27 and the third passage 29 are shut off, the molten metal introduction passage 26 and the third passage 29 communicate with each other, and the molten metal suction state prepared for the next molding is restored. In the cavity b6 of the mold b5, the filled molten metal M is solidified to become a casting C, and one shot is completed.

  The present invention is useful when casting a casting using a non-ferrous metal such as an aluminum alloy, a magnesium alloy, a zinc alloy, and a copper alloy.

It is a block diagram of the automatic molten metal supply apparatus which concerns on embodiment, and a hot-water supply part is a cross section corresponded to the XX line of FIG. It is an enlarged view of the hot water supply part in FIG. It is sectional drawing in the YY line of FIG. The operation process of the automatic molten metal supply apparatus which concerns on embodiment is shown, (a) is a molten metal suction process, (b) is a molten metal amount adjustment process, (c) is a hot water supply preparation process, (d) is a hot water supply start process, ( e) is a molten metal injection step, and (f) is a molten metal suction state returning step.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding furnace 2 Hot-water supply apparatus 8 Hot-water supply part 10 Plate (support part)
12 Hot water supply piston drive device 13 Tap valve drive device 16 Hot water supply piston 19 Shaft 20 Tap valve 21 Strut 22 Hot water supply pipe 23 Hot water supply cylinder 24 Molten metal passage 26 Molten metal introduction passage 27 First passage 28 Second passage 29 Third passage 30 Remaining hot water discharge section 32 Filter A Automatic molten metal supply device B Molding device M Molten metal

Claims (11)

An automatic molten metal supply device that automatically supplies a fixed amount of molten metal in a holding furnace to a molding device through a hot water supply pipe by a hot water supply device,
The automatic hot-water supply device, wherein the hot-water supply device is suspended and supported in the holding furnace so as to be movable in a three-dimensional direction. In the automatic molten metal supply device according to claim 1,
The hot water supply apparatus includes a hot water supply portion having a hot water supply cylinder in which a hot water supply piston is inserted so as to be able to advance and retract and is always immersed in the molten metal in the holding furnace,
In the hot water supply section, a molten metal passage having one end connected to the hot water supply pipe and the other end connected to the hot water supply cylinder, and a molten metal introduction that guides the molten metal in the holding furnace connected to the molten metal passage in the middle of the molten metal passage. An automatic molten metal supply device characterized in that a passage is provided. In the automatic molten metal supply apparatus of Claim 2,
An automatic molten metal supply device, wherein the hot water supply piston is detachably connected to a hot water supply piston driving device attached to a support portion above the holding furnace. In the automatic molten metal supply apparatus of Claim 2,
The automatic molten metal supply apparatus characterized by the above-mentioned. In the automatic molten metal supply device according to claim 4,
The molten metal passage includes a first passage extending obliquely downward from a connection end of the hot water supply pipe,
A second passage extending upward from the lower end of the first passage and connected to the molten metal introduction passage;
A third passage extending obliquely upward from the upper end of the second passage and connected to the hot water supply cylinder;
An automatic molten metal supply device, wherein a remaining hot water discharge portion is provided at a lower end portion of the first passage. In the automatic molten metal supply device according to claim 5,
In the second passage, the molten metal introduction passage and the third passage are communicated by the lowering operation and the first passage and the third passage are blocked, while the first passage and the third passage are communicated by the raising operation. An automatic molten metal supply apparatus, wherein a tap valve for blocking the molten metal introduction path and the third path is provided so as to be movable up and down. In the automatic molten metal supply device according to claim 6,
An automatic molten metal supply device, wherein the tap valve is detachably connected to a tap valve driving device attached to a support portion above the holding furnace from the second passage. In the automatic molten metal supply device according to claim 7,
The tap valve and the tap valve driving device are connected by a shaft,
The molten metal introduction path is connected to the lower end of the cylindrical filter so that the upper end protrudes upward from the molten metal surface in the holding furnace, and the shaft is inserted and arranged in the filter with a gap around the periphery. An automatic molten metal supply device. In the automatic molten metal supply device according to claim 8,
An automatic molten metal supply device, wherein the upper end of the filter is supported on the support side. In the automatic molten metal supply apparatus of any one of Claim 2 thru | or 9,
An automatic molten metal supply device characterized in that the hot water supply portion is made of graphite. In the automatic molten metal supply apparatus of any one of Claim 2 thru | or 10,
An automatic molten metal supply apparatus, wherein a hot water supply part is supported by a support part by a plurality of ceramic support columns.

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