JP2013049018A - Mixer for mixing powder and liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixer for efficiently mixing powder and liquid.SOLUTION: The mixer (1) for mixing powder and liquid by spraying the liquid into a container (50) while rotating the container (50) which stores the powder. The mixer (1) includes: a frame body (20) for removably fixing the container (50); rotary shafts (41, 43) respectively mounted to both side surfaces of the frame body (20) so as to rotate/drive the frame body (20); a liquid tank (61) storing the liquid and removably fixed to the frame body (20); an air supply passage (66) for supplying compressed air to the liquid tank (61); and a nozzle (65) for spraying the liquid pushed out by the compressed air from the liquid tank (61) inside the container (50). The air supply passage (66) is formed in the axial direction inside at least one rotary shaft (43).

Description

  The present invention relates to a mixing apparatus that mixes powder and liquid by spraying liquid into the container while rotating the container containing powder.

  Conventionally, in food production or the like, in order to uniformly mix a granular or powdery substance (hereinafter referred to as “powder”) and a liquid, the liquid is sprayed into the container while rotating the container containing the powder. Mixing devices are known.

  Patent Document 1 discloses an apparatus for stirring and mixing powder stored in a container, which is one of the basic forms of the above mixing apparatus. The container that can be attached to and detached from the apparatus includes a lid, and a stirring blade is attached to the lower surface side of the lid, and the shaft of the stirring blade projects to the upper surface side of the lid. When the container is fixed to the device, the shaft of the stirring blade is connected to the drive shaft of the drive motor installed in the device. The stirring blades are rotated by the drive motor to stir the powder.

  Patent Document 2 discloses a powder and liquid mixing apparatus. The apparatus supports and rotates a detachable container that contains the powder. A liquid can be injected into the container by a liquid injection nozzle from a liquid supply source installed outside the apparatus via a connecting pipe and a rotary joint. During the rotation of the container, the rotation position detection sensor detects that the liquid injection point has reached the upper rotation position, and the injection control device injects the liquid into the container in a spraying manner accordingly.

  Patent Document 3 also discloses a powder and liquid mixing apparatus. The apparatus includes a container that stores powder and a rotation mechanism that rotates the container. The liquid tank rotates with the container fixing frame. When compressed air is supplied to the liquid tank via the air flow path via the rotary joint, the liquid is injected from the liquid tank into the container.

JP 2003-144893 A Japanese Patent Laid-Open No. 5-168887 JP 2006-122761 A

  When the liquid is sprayed with the nozzle onto the powder in the rotating container as in Patent Document 2, it is desirable to spray when the nozzle comes to the upper position. When the nozzle is in the lower position, the nozzle is buried in the powder, and if sprayed at this time, the nozzle is blocked, so this is avoided. However, since the rotational position detection in Patent Document 2 is performed by a sensor using light or magnetic force (0030, FIG. 2), it is necessary to link the electronic circuit of the sensor and the air fluid circuit. Becomes complicated.

  When the liquid tank is attached to the rotating container fixing frame as in Patent Document 3, the operation of exchanging with a different type of liquid is easier than in the case of installing the liquid tank outside the apparatus, and the liquid flow path Since no cleaning is required, the work load is reduced. However, in Patent Document 3, since the compressed air flow path connecting the liquid tank attached to the container fixing frame and the external pump is guided across the space around the container (0029, FIG. 2), the rotary joint Even if there is a gap, the mechanical burden on the air flow path with rotation is considerably large, and there is a risk of being caught by the rotating container fixing frame, which is not durable.

  In view of the above-described problems of the prior art, the present invention provides a simple structure capable of spraying liquid at an optimal timing to a rotating container in a mixing device for mixing powder and liquid, and a rotating frame. An object of the present invention is to provide a durable structure capable of reliably and safely supplying compressed air to a liquid tank attached to a body.

  In order to achieve the above object, the present invention provides the following configuration. The numbers in parentheses are reference numerals in the drawings described later, and are attached for reference.

  The mixing device for mixing powder and liquid according to the present invention is a mixing device (1 for mixing powder and liquid by spraying liquid into the container (50) while rotating the container (50) containing powder. ) In which the container (50) is detachably fixed, and rotating shafts (41) respectively attached to both side surfaces of the frame (20) for rotationally driving the frame (20). 43), a liquid tank (61) that contains liquid and is detachably fixed to the frame (20), and an air supply path (66) for supplying compressed air to the liquid tank (61) A nozzle (65) for spraying the liquid pushed out from the liquid tank (61) by compressed air in the container (50), and the air supply path (66) is at least one of the The rotary shaft (43) is formed in the axial direction inside.

  In the mixing device, the liquid tank (61) includes a cylindrical main body having both ends (61a, 61b) closed, a single piston (67) disposed in the internal space of the main body, and compressed air. An inflow port (61a1) formed at one end (61a) for injecting liquid and an outflow port (61b1) formed at the other end (61b) for extruding liquid, It is preferable that a liquid can be accommodated in the internal space between the piston (67) and the other end (61b).

In the mixing device, the cam (71) rotating with the rotating shaft (41, 43), the follower (72) moved by the cam (71), and the air supply according to the movement of the follower (72) An air valve (73) for switching supply or stop of compressed air to the passage (66),
When the container (50) is rotated by the rotary shaft (41, 43), the cam (50) is supplied with compressed air only when the container (50) is within a predetermined rotation angle range (θ). It is preferable that the shape of 71) is set.
The cam (71) is composed of two divided cam pieces (71a, 71b), and the two cam pieces (71a, 71b) are arranged around the rotation axis so that they can overlap each other when viewed from the axial direction. The predetermined rotation angle range (θ) to which the compressed air is supplied can be changed by changing the overlapping angle of the two cam pieces (71a, 71b). Is preferable.

  In the mixing apparatus, the stirring blade (14, 59) disposed inside the container (50) in a state where the container (50) is fixed to the frame (20), and the stirring blade (14, It is preferable to further include a stirring motor (11) fixed to the frame (20) to rotate 59).

  In the mixing apparatus for mixing powder and liquid according to the present invention, a liquid tank is attached to a frame that detachably fixes a container, and an air supply of compressed air supplied to the liquid tank in order to push the liquid out of the liquid tank A path is formed in the axial direction in at least one of the rotating shafts that rotationally drive the frame. That is, an air supply path that guides compressed air from the outside of the mixing device to the frame is formed inside the rotary shaft. Thereby, a mechanical burden is not applied to the constituent members of the air supply path along with the rotation, and the constituent members of the air supply path are not caught on the frame body during the rotation. Therefore, the durability of the air supply path can be ensured, and the compressed air can be constantly supplied stably.

  In the present invention, the amount of liquid supplied into the container in one step is defined by the capacity of the liquid tank. Thereby, since an excess liquid is not supplied to a container, the danger that the pressure in a container will increase with an excess liquid will not arise. When the liquid in the liquid tank runs out, the piston reaches the other end and does not move any further, so that the pressure of the compressed air does not reach the portion beyond the liquid outlet. That is, the pressure of compressed air is not loaded into the container. Also in this respect, it is possible to avoid the danger of high pressure inside the container (there is a risk of explosion).

  Further, in the present invention, in order to control the supply and stop of the compressed air to the air supply path, a cam that rotates with the rotating shaft, a follower that moves by the cam, and a compression to the air supply path according to the movement of the follower And an air valve for switching supply or stop of air. As described above, in the present invention, the movement of the rotating shaft that rotates the container is directly used for switching the air valve via the cam mechanism, so that an electronic circuit in the case of using an optical sensor or a magnetic sensor is unnecessary, Moreover, the cooperation of an electronic circuit and a fluid circuit is also unnecessary. Therefore, liquid spraying and stopping can be reliably controlled with a simple configuration.

  Furthermore, by dividing the cam into two parts and making the cam shape changeable, it is possible to change the rotation angle range for supplying compressed air. Thereby, it is not necessary to remove the cam and replace it with a cam of another shape in order to change the rotation angle range, and the workability is improved.

  By placing a stirring blade in the container and rotating it with a stirring motor, it is possible to efficiently crush the powder that is agglomerated (so-called lumps) by the sprayed liquid, and to mix the liquid and powder well. realizable.

FIG. 1 is a front view schematically showing a main part in an embodiment of a powder and liquid mixing apparatus according to the present invention. FIG. 2 is a plan view similar to FIG. 1 (showing wider areas on the left and right sides than FIG. 1). FIG. 3 is a right side view similar to FIG. 4A and 4B are diagrams showing in detail an embodiment of the liquid tank, wherein FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a bottom view. It is a figure explaining the state under operation which sends out compressed air to a liquid tank and pushes out liquid. (A) is the state at the start, (b) is in the operating state, and (c) is the state at the end. 6 is an enlarged view showing a detailed configuration of the liquid control means shown in FIG. 2, and (a) is a partial cross-sectional side view showing the vicinity of the liquid control means including the rotating shaft. ) Is a schematic A arrow view of (a). FIG. 7 is another embodiment of the cam shown in FIG. FIG. 8 is a diagram showing another embodiment of the mixing apparatus of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
FIG. 1 is a front view schematically showing a main part in an embodiment of a powder and liquid mixing apparatus according to the present invention, and FIG. 2 is a plan view (showing a wider area on both the left and right sides than FIG. 1). FIG. 3 is a right side view.

  As shown in FIGS. 1-3, the mixing apparatus 1 is provided with the frame 20 which fixes the container 50 so that attachment or detachment is possible. The frame 20 has a substantially rectangular parallelepiped box shape, and is formed by appropriately combining members corresponding to beams, columns, and wall plates. The frame member 20 has a ceiling member 21 disposed on the upper surface, column members 22 disposed at at least four corners, and wall plate members 24 disposed on the left and right side surfaces. A rotation shaft 41 is attached to the wall plate member 24 on the right side surface, and a rotation shaft 43 is attached to the wall plate member 24 on the left side surface. The frame 20 rotates around the rotation shafts 41 and 43. A telescopic column member 23 extends from the lower end of the column member 22. The telescopic column member 23 expands and contracts according to the vertical movement of the container leg receiving member 25 connected to the lower end thereof.

  The stirring motor 11 is fixed to the center of the upper surface of the ceiling member 21 of the frame body 20. The stirring shaft 12 that is a drive shaft of the stirring motor 11 penetrates the ceiling member 21 downward. A lid 13 of the container 50 is attached to the periphery of the stirring shaft 12 that has penetrated through a bearing. Further, the stirring shaft 12 extends below the lid 13 and has a stirring blade 14 at the tip. The stirring blade 14 is rotationally driven by the stirring motor 11.

  Further, an appropriate connector 13 a that penetrates the lid 13 is provided. On the upper surface side of the lid 13, a liquid supply hose 64 that supplies liquid to the connector 13 a is connected, and on the lower surface side of the lid 13, a nozzle 65 is connected to the connector 13 a. Thereby, the liquid supply hose 64 and the nozzle 65 are communicated.

  A container fixing part 30 for fixing the container 50 in a detachable manner is provided inside the frame body 20. Air cylinders 31 are fixed inside the left side surface and the right side surface of the frame 20, respectively. The plunger 32 protruding from the lower end of the air cylinder 31 is connected to the container leg receiving member 25 at the lower end. The plunger 32 expands and contracts by compressed air supplied to the air cylinder 31 (the air supply path for this compressed air is not shown), whereby the container leg receiving member 25 moves up and down. A container pressing member 34 hangs down from the ceiling member 21 of the frame 20.

  In FIG. 1, for the container 50, only the left half in the fixed state is indicated by a solid line, and only the right half in the open state is indicated by a dotted line. The container 50 includes a container main body 51 including a rectangular tube portion and a pyramid portion, and has a circular opening through a cylindrical opening neck portion 53 at the center of the upper surface. Press pads 52 are provided at the four corners of the upper surface of the container body 51. Furthermore, it has four legs 55, and a roller 57 is attached to the lower end of the legs 55. A discharge port 54 is provided at the lower end of the pyramid portion. When the container 50 is released from the mixing device 1, it can be moved by a roller 57. A horizontal support plate 56 is provided outward at an intermediate position of the leg 55. The support plate 56 is placed on the container leg receiving member 25 of the frame body 20.

  When the container 50 is fixed, the plunger of the air cylinder 31 contracts so that the container leg receiving member 25 rises on the support plate 56 of the container 50. When the pressing pad 52 on the upper surface of the container 50 hits the container pressing member 34 of the frame body 20, the container 50 is pressed upward and fixed by the air pressure of the air cylinder 31. In the fixed state, the upper surface opening of the container 50 is sealed by the lid 13. In this fixed state, the stirring blade 14 and the nozzle 65 are disposed in the container main body 51 of the container 50. Conversely, when opening the container 50, the plunger of the air cylinder 31 is extended.

  In addition, the specific structure of the frame 20, the container fixing | fixed part 30, and the container 50 is not limited to the Example of illustration, You may utilize a well-known various structure.

  A main part of the liquid spraying means 60 for spraying the liquid in the container 50 is attached to the frame body 20 and rotates together with the frame body 20. The liquid spraying means 60 has a liquid tank 61 that stores liquid. The liquid tank 61 has a cylindrical shape and is detachably fixed to the frame body 20 using an appropriate fixing tool 62. The fixture 62 is, for example, a band whose length is adjustable with a fastener. An air supply hose 63 that sends compressed air to the liquid tank 61 is connected to one end of the liquid tank 61 in order to push the liquid from the liquid tank 61. The liquid pushed out from the liquid tank 61 is guided to the nozzle 65 by the liquid hose 64 connected to the other end of the liquid tank 61 and sprayed in the container 50 by the nozzle 65.

  As shown in the plan view of FIG. 2, the frame body 20 is attached to both side surfaces thereof and is attached to be inclined with respect to the axes of the rotary shafts 41 and 43. Thereby, since complicated stirring operation is performed inside the container 50, the efficiency of mixing improves. This is a preferred embodiment, but the frame 20 does not necessarily have to be inclined with respect to the rotation axis.

  One rotary shaft 41 is supported by a bearing 44, and a rotary motor 42, which is an orthogonal shaft gear motor, is attached to the tip of the rotary shaft 41. In the orthogonal shaft gear motor, the motor shaft and the rotation shaft are orthogonal to each other, thereby making the entire apparatus compact. However, the rotation motor 42 is not limited to an orthogonal shaft gear motor. The other rotating shaft 43 is also supported by a bearing 44. With this configuration, the frame body 20 is supported and rotated by the rotation shafts 41 and 43.

  An air supply hose 63 connected to one end of the liquid tank 61 of the liquid spraying means 60 communicates with an air supply path 66 formed in the axial direction inside the rotary shaft 43. The air supply path 66 and the air supply hose 63 are connected by, for example, an appropriate joint (not shown).

  Although not shown here, it is preferable that an air supply path for supplying compressed air to the air cylinder 31 of the container fixing portion 30 is also formed in the axial direction inside the rotary shaft 43. These air supply paths are shown in detail in FIG. A rotary joint 46 for connecting these air supply paths to an external compressed air source (not shown) is provided at the tip of the rotating shaft 43.

  Furthermore, a liquid control means 70 is provided at an intermediate position of at least one of the rotating shafts 43. The liquid control unit 70 controls the spraying or stopping of the liquid by the liquid spraying unit 60. Specifically, control is performed so that the liquid is sprayed from the nozzle 65 only when the rotating container 50 is in the upright posture, and the liquid is not ejected when the container 50 is in the inverted posture. This is because the nozzle 65 is buried in the powder in the inverted posture, and the nozzle 65 is blocked when sprayed in that state.

  The liquid control means 70 includes a cam 71 that rotates together with the rotary shaft 43, a follower 72 that moves by the cam 71, and an air valve 73 that switches supply or stop of compressed air to the air supply path 63 according to the movement of the follower 72. Have. The liquid control means 70 is shown in detail in FIG. In the illustrated example, the liquid control means 70 is provided on the rotary shaft 43, but may be provided on the rotary shaft 41.

  4A and 4B are diagrams showing in detail an embodiment of the liquid tank 61, where FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a bottom view. One piston 67 is disposed in the internal space of the cylindrical main body of the liquid tank 61. The piston 67 is a disk or a cylinder having substantially the same diameter as the internal space. The piston 67 is movable in the axial direction. When the piston 67 is at an intermediate position of the internal space, the internal space is partitioned into two chambers in the axial direction. Both ends of the cylindrical main body are closed by detachable lids 61a and 61b and can be sealed. A compressed air inlet 61a1 is formed in the lid 61a at one end, and an air supply hose can be connected thereto. A liquid outlet 61b1 is formed in the lid 61b at the other end, and a liquid supply hose can be connected thereto.

  FIG. 5 is a diagram for explaining a state in which the compressed air is sent into the liquid tank 61 to push out the liquid. (A) is the state at the start, (b) is in the operating state, and (c) is the state at the end.

  At the start of FIG. 5A, the piston 67 is positioned at one end on the air supply hose 63 side, and the entire internal space of the liquid tank 61 is filled with the liquid 80. During the operation shown in (b), the compressed air 90 is sent from the air supply hose 63, whereby the piston 67 moves toward the other end, and the liquid 80 is pushed out to the liquid supply hose 64. When the inflow of the compressed air 90 stops during operation, the piston 67 also stops and the extrusion of the liquid 80 also stops. At the end of (c), the piston 67 is completely moved to the other end, and all the liquid 80 is pushed out.

  When the type of the liquid 80 is changed when continuously performing a mixing operation using a plurality of containers, the liquid tank 61, the liquid supply hose 64, and the nozzle 65 may be replaced together. Since it is not necessary to clean these parts and replace the liquid, workability is good.

  Further, when the liquid 80 in the liquid tank 61 is exhausted, the piston 67 reaches the other end and does not move any further, so that the pressure of the compressed air 90 does not reach the portion beyond the liquid supply hose 64. Thereby, only the predetermined amount of liquid can be sprayed reliably, and at the same time, the risk that the pressure of the compressed air is applied to the container and the inside of the container becomes high pressure can be avoided.

  FIG. 6 is an enlarged view showing a detailed configuration of the liquid control means 70 shown in FIG. (A) is the partial cross section side view which showed the vicinity of the liquid control means 70 containing the rotating shaft 43, (b) is a schematic A arrow view of (a). In FIG. 6, the flow of compressed air is schematically shown by a two-dot dashed line.

  The liquid control means 70 includes a cam 71 that rotates together with the rotary shaft 43, a follower 72 that moves by the cam 71, and an air valve 73 that switches supply or stop of compressed air to the air supply path 66 according to the movement of the follower 72. Have. The air valve 73 is connected to a compressed air source 91 such as a compressor. In the illustrated example, the cam 71 is a plate having an outer shape that is a large-diameter circle in a predetermined rotation angle range θ and a small-diameter circle in other rotation angle ranges. The cam 71 is disposed coaxially with the rotary shaft 43 and is fixed so as to rotate integrally. The follower 72 is a terminal that pivots along the outer shape of the cam 71. Due to the change in the orientation of the follower 72, the air valve 73 passes or blocks the flow of compressed air from the compressed air source 91 to the rotary joint 46. The compressed air is allowed to pass while the follower 72 is in contact with the portion of the rotation angle range θ of the cam 71, and the compressed air is blocked while it is in contact with the other portions.

  The rotation angle range θ of the cam 71 is set so as to correspond to a rotation angle range in which the container 50 is in an almost upright posture. θ is set to 120 °, for example, but is not limited thereto. When setting a different θ, the cam 71 may have a different outer shape with a different θ. According to this configuration, the rotation of the cam 71 causes the liquid to be sprayed only when the container 50 is within the predetermined rotation angle range.

  As shown in FIG. 6, the air supply path 66 that communicates with the rotary joint 46 passes through the inside of the rotary shaft 43 in the axial direction, and further communicates with the liquid tank 61 via the air supply hose 63 shown in FIG. .

  The compressed air source 91 also supplies compressed air to the air cylinder 31 of the container fixing unit 30 shown in FIG. Similarly, an air supply path 33 communicating with the air cylinder 31 is also formed in the axial direction inside the rotary shaft 43. The air supply path 33 and the air cylinder 31 are connected by an appropriate air supply hose.

  The air supply paths 66 and 33 are formed inside the rotary shaft 43 and are not affected by mechanical influences (vibration, twisting, contact, etc.) due to the rotation of the frame body 20.

  FIG. 7 shows another embodiment of the cam 71 shown in FIG. FIGS. 7A, 7B, and 7C show three different shapes that can be taken by one cam in this other embodiment, and the upper diagram is a view taken along the arrow A similar to FIG. 6B. The lower diagram is a schematic side view. This cam is composed of two cam pieces 71a and 71b. The two cam pieces 71a and 71b have, for example, a shape obtained by dividing the cam 71 of FIG. 6 into two along the diameter. As shown in the schematic side view, these two cam pieces 71a and 71b are disposed on the rotating shaft 43 while being shifted by a predetermined distance in the axial direction. The follower 72 is provided with a width capable of contacting both the cam pieces 71a and 71b.

  For example, the cam piece 71a is completely fixed to the rotation shaft 43, and the cam piece 71b is rotatable around the rotation axis. That is, the two cam pieces can be moved relatively in an angular relationship around the rotation axis. Thus, the two cam pieces 71a and 71b can overlap each other when viewed from the axial direction, and the overlapping angle can be changed. As a result, as shown in FIGS. 7A, 7B, and 7C, the overall shape of the cam composed of the two cam pieces 71a and 71b can be changed. After setting to a predetermined cam shape, for example, an appropriate fastener 75 is passed through a hole provided in the cam piece to fix the two cam pieces together. This fixing means is optional.

  By using the cam shown in FIG. 7, the cam shape can be changed without replacing one cam with another cam, that is, a predetermined rotation angle range to which compressed air is supplied can be changed. .

  FIG. 8 is a diagram showing another embodiment of the mixing apparatus of the present invention. As in FIG. 1, the left half of the container 50 'in the fixed state is indicated by a solid line, and the right half of the container 50' in the open state is indicated by a dotted line. The mixing apparatus 2 is different from the mixing apparatus 1 shown in FIG. 1 in the configuration of the stirring blade and the lid.

  In the mixing device 2, the stirring shaft 12 that is a drive shaft of the stirring motor 11 penetrates the ceiling member 21 of the frame body 20 and protrudes downward. However, only the connection mechanism is provided at the lower end portion of the stirring shaft 12. The lid and the stirring blade are not attached. On the other hand, the container 50 ′ is provided with a detachable lid 58, a stirring blade 59 is disposed below the lid 58, and the rotating shaft 59 a of the stirring blade 59 projects through the center of the lid 58 and protrudes upward. A connection mechanism is provided at the upper end portion.

  As described above, in the mixing apparatus 2, the lid 58 and the stirring blade 59 are attached to the container 50 ′ instead of the frame body 20. A liquid supply hose 64 can be connected to the upper surface of the lid 58, and a nozzle 65 can be connected to the lower surface of the lid 58. The nozzle 65 is previously attached to the lower surface of the lid 58. When the container 50 ′ is fixed, the container 50 ′ is raised and pressed in the same manner as in the embodiment of FIG. 1, and the rotating shaft 59 a of the stirring blade 59 and the stirring shaft 12 of the stirring motor 11 are connected. As the connection mechanism, any known configuration may be used as long as rotation is transmitted from the stirring shaft 12 to the rotating shaft 59a.

  In the mixing apparatus 1 of FIG. 1, since the lid and the stirring blade are attached to the frame body 20, it is necessary to wash the lid and the stirring blade when the contents of the mixture are different when performing continuous work with a plurality of containers. However, in the mixing apparatus 2 of FIG. 8, since the lid 58 and the stirring blade 59 are attached to the container 50 ′, it is not necessary to clean the lid and the stirring blade when replacing with another container, and workability is improved. Good.

  The configuration of the other parts of the mixing apparatus 2 in FIG. 8 is the same as that of the mixing apparatus 1 in FIG.

DESCRIPTION OF SYMBOLS 1, 2 Mixing apparatus 11 Stirring motor 12 Stirring shaft 13 Container lid 14 Stirring blade 20 Frame 21 Ceiling member 22 Column member 23 Telescopic column member 24 Wall plate member 25 Container leg receiving member 30 Container fixing portion 31 Air cylinder 32 Plunger 33 Air supply path 34 Container pressing member 41, 43 Rotating shaft 42 Rotating motor 44 Bearing 46 Rotary joint 50 Container 51 Container body 52 Press pad 53 Open neck portion 54 Discharge port 55 Leg 56 Support plate 57 Roller 58 Lid 59 Stirring blade 60 Liquid spray Means 61 Liquid tank 62 Fixing device 63 Air supply hose 64 Liquid supply hose 65 Nozzle 66 Air supply path 67 Piston 70 Liquid control means 71 Cam 71a, 71b Cam piece 72 Follower 73 Air valve 75 Cam fixing pin 80 Liquid 90 Compressed air 91 Compressed air source

Claims (5)

In the mixing apparatus (1) for mixing the powder and the liquid by spraying the liquid in the container (50) while rotating the container (50) containing the powder,
A frame (20) for removably fixing the container (50);
Rotating shafts (41, 43) respectively attached to both side surfaces of the frame (20) to rotationally drive the frame (20);
A liquid tank (61) that contains liquid and is detachably fixed to the frame (20);
An air supply path (66) for supplying compressed air to the liquid tank (61);
A nozzle (65) for spraying the liquid pushed out of the liquid tank (61) by the compressed air in the container (50),
The mixing device for mixing powder and liquid, wherein the air supply path (66) is formed in the axial direction inside at least one of the rotating shafts (43).   The liquid tank (61) includes a cylindrical main body whose both end portions (61a, 61b) are closed, a single piston (67) disposed in the internal space of the main body, and one for injecting compressed air. An inlet (61a1) formed at the end (61a) of the other end, and an outlet (61b1) formed at the other end (61b) for extruding the liquid, the piston (67) The mixing apparatus for mixing powder and liquid according to claim 1, wherein the liquid can be stored in an internal space between the other end (61b). A cam (71) that rotates with the rotating shaft (41, 43), a follower (72) that moves by the cam (71), and the air supply path (66) according to the movement of the follower (72). An air valve (73) for switching supply or stop of compressed air, and
When the container (50) is rotated by the rotary shaft (41, 43), the cam (50) is supplied with compressed air only when the container (50) is within a predetermined rotation angle range (θ). 71. The mixing apparatus for mixing powder and liquid according to claim 1 or 2, wherein the shape of 71) is set.   The cam (71) is composed of two divided cam pieces (71a, 71b), and the two cam pieces (71a, 71b) are relative to each other around the rotation axis so that they can overlap each other when viewed in the axial direction. The predetermined rotational angle range (θ) to which compressed air is supplied can be changed by changing the overlapping angle of the two cam pieces (71a, 71b). The mixing apparatus for mixing powder and liquid according to claim 3.   In order to rotate the stirring blade (14, 59) disposed inside the container (50) and the stirring blade (14, 59) while the container (50) is fixed to the frame (20). The mixing apparatus for mixing powder and liquid according to any one of claims 1 to 4, further comprising a stirring motor (11) fixed to the frame (20).

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