JP5730130B2 - Die casting machine release agent supply device - Google Patents

Description

  The present invention relates to a mold release agent supply device for supplying a granular mold release agent and a lubricant (hereinafter referred to as “release agent” to include a lubricant) to a die casting machine.

  Conventionally, in a die casting machine, in order to facilitate removal of a cast product from a mold and to protect a sleeve of an injection device, a release agent is applied to the inner surface of the cavity of the mold and the inner peripheral surface of the sleeve. Application is performed.

  For example, Patent Document 1 proposes a method of transporting and applying a powder release agent toward a mold using air heated by a heater. However, this method requires a heating device such as a heater. In addition, an air discharge amount that can be applied uniformly to the mold insert and a transfer pipe of a corresponding size are required, and the apparatus tends to be large. Also, from the viewpoint of preventing release agent scattering, it is more environmentally advantageous to apply the release agent with the cavity closed, but in this method, each of the fixed mold and movable mold with the cavity open. It is necessary to perform the coating operation.

  Patent Document 2 proposes a method in which the powder release agent is conveyed by air with the cavity closed. However, this method requires a plurality of pinch valves and an air supply port, has a large number of parts, and tends to be complicated to control.

Japanese Patent Laid-Open No. 10-28922 JP 2004-223562 A

  This invention is made | formed in view of said point, and provides the mold release agent supply apparatus which can supply a granular mold release agent with a simple apparatus.

  According to the first aspect of the present invention, in order to quantitatively supply the granular mold release agent every time in accordance with the operation cycle of the die casting machine, the granular mold release agent falling from the hopper is loaded into the loading section of the transport body, and then the transport body drive The release agent supply device is intended to slide the carrier in the casing and convey the granular release agent to the injection device, and then convey the granular release agent together with the gas to the die casting machine.

That is, the invention of claim 1 is a hopper for storing a release agent;
A casing receiving port that is attached to the lower side of the hopper dropping port of the hopper, a casing dropping port provided at a position away from the casing receiving port, and a casing having a gas supply port, and can be moved forward and backward in the casing. A carrier having a loading portion for loading the release agent, a hopper dropping port provided adjacent to the loading portion, and a closing portion for closing the casing receiving port, and the carrier. , A metering and conveying device including a carrier driving unit that slides in the casing, a suction unit that is attached to the lower side of the casing dropping port, and sucks the release agent downward, and an intersection of the suction unit An injection device comprising a gas ejection part for ejecting a gas in a direction, an ejection port for injecting the gas ejected from the gas ejection part, and the granular release agent;
It concerns on the mold release agent supply apparatus comprised by these.

  According to a second aspect of the present invention, there is provided a mold release agent supply apparatus according to the first aspect, wherein a mold release agent supply apparatus is added to the mold release agent supply apparatus with little modification of the die casting machine. It is intended to provide an input device having an input port that enables an approaching / leaving operation.

  That is, the invention of claim 2 is characterized in that, in claim 1, the connection port connected to the injection port, the input port for supplying the particulate mold release agent to the gate of the die casting machine, the connection port and the input port. The present invention relates to a mold release agent supply device having a charging device that includes a pipe that communicates with the charging port and a charging port drive unit that enables the charging port to move toward and away from the gate.

  According to a third aspect of the present invention, there is provided a release agent supplying apparatus according to the second aspect, wherein a bending portion that separates the gas conveyed from the injection port and the granular release agent is provided in order to prevent excess gas from flowing into the cavity of the die casting machine. Intended to provide.

That is, the invention of claim 3, in claim 2, wherein the pipe inlet of the feeding device is provided in a bent portion which is bent at right angles in together and constituted by a rigid pipe, the outside of the bend portion pipe wall corresponding to the arc has become a net material, said than the bending portion to the inlet according to the direct constituted releasing agent supply device lead.

According to the mold release agent supply apparatus of claim 1, the invention of claim 1 includes a hopper for storing the mold release agent,
A casing receiving port, a casing dropping port provided at a position away from the casing receiving port, and a casing having a gas supply port, which are attached to the lower side of the hopper dropping port of the hopper, are inserted into the casing so as to be capable of moving forward and backward. A carrier having a loading part for loading a release agent, a hopper dropping port provided adjacent to the loading part and a closing part for closing the casing receiving port, and a carrier for sliding the carrier in the casing. A metering and conveying device including a body drive unit, a suction unit that is attached to the lower side of the casing dropping port, and sucks the release agent downward, a gas ejection unit that ejects gas in the crossing direction of the suction unit, and a gas An injection device comprising an injection port for injecting the gas ejected from the ejection part and the particulate release agent;
The release agent supply device configured as described above can supply the granular release agent with a simple device.

  Specifically, it is possible to load the granular release agent into the loading part by gravity from the hopper drop port without using a special device, and the granular release agent is loaded with a fixed amount every time for the volume of the loading part, adjacent to the loading part. Since the hopper drop opening or the casing receiving port can be closed by sliding the carrier, the granular release agent can be conveyed to the injection device at the same time as the closing by sliding the carrier, In order to inject and convey the mold material, the movable part is not in the injection device and is not easily damaged.

  According to the mold release agent supply apparatus of Claim 2, in Claim 1, the connection port connected to the said injection port, the injection port which throws a granular mold release agent into the gate of a die-cast machine, The said connection port In the cold chamber die-casting machine, mainly having a charging device provided with a pipe that communicates with the charging port, and a charging port drive unit that allows the charging port to move close to and away from the gate. The granular mold release agent can be introduced while the ladle is not injecting the molten metal into the sleeve gate, and a new mold release agent supply device can be added with little modification of the equipment. Moreover, since the release agent can be applied not only to the mold but also to the sleeve, the life of the sleeve can be extended and the labor for maintenance and inspection can be reduced.

According to the release agent supply device according to claim 3, in claim 2, piping inlet of said dosing device is provided with a bent portion which is bent at right angles in together and composed of rigid pipe, pipe wall corresponding to the outer arc of the bend portion is a mesh material, because said than the bending portion to the inlet is directly configured lead, from the network material gas ejected from the gas blowout part It can be discharged and only granular release agent can be supplied. Therefore, an excessive load is not applied to the vacuum exhaust device of the die casting machine.

It is the figure which abbreviate | omitted a part of the housing | casing of the mold release agent supply apparatus which concerns on this invention. It is a right view showing the principal part of the internal structure of the mold release agent supply apparatus of FIG. FIG. 3 is an AA cross-sectional view illustrating an aspect of the operation of FIG. 2. It is AA sectional drawing showing the other aspect of the operation | movement of FIG. It is a top view of a conveyance body. It is a figure showing the Example of the mold release agent supply apparatus which provided the injection | throwing-in apparatus. It is a figure showing the other Example of a charging device. It is a figure showing the example of actual use of a mold release agent injection device. It is a figure showing the example of actual use of a mold release agent injection device. It is a figure showing the example of actual use of a mold release agent injection device.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[Configuration of Example 1]
First, the configuration of the first embodiment will be described. As shown in FIGS. 1 to 5 and FIG. 8, the release agent supply device 1 is provided below a hopper 10 housed in an upper portion of a housing 2 attached to a frame of a casting machine (not shown). The weighing and conveying device 20 and the injection device 60 are included.

  A pressure reducing valve 3 for taking in compressed air is provided outside the housing 2, and compressed air for operation is supplied from the outside. In addition, operation and operation power and signals are supplied by wiring not shown. The casing 2 is made of metal, synthetic resin, or the like. However, the internal state may be confirmed by using a transparent member as appropriate when necessary.

  The hopper 10 includes a hopper inlet (not shown) for charging the granular release agent 90, a hopper main body 10a for storing the granular release agent 90, and a granular release agent provided below the hopper main body 10a. It has a hopper drop opening 13 to be dropped, a remaining amount confirmation window 11 and a remaining amount detection sensor 12. The shape of the hopper 10 is narrowed as it goes toward the hopper dropping port 13, and the granular release agent 90 naturally falls from the hopper dropping port 13 due to gravity. The remaining amount confirmation window 11 is provided on the side surface of the hopper 10 in the vertical direction, and has a transparent member for confirming the remaining amount of the particulate release agent 90. In addition, a remaining amount detection sensor 12 is provided in the vicinity of the hopper dropping port 13 for issuing an alarm indicating that the granular release agent 90 is low.

  The weighing and conveying apparatus 20 includes a casing fitted in the hopper dropping port 13 and provided in the horizontal direction of the hopper dropping port 13, the casing 21, the conveying body 30, and the conveying body driving unit 50. The casing 21 is a horizontal cylindrical member and is fitted to the hopper dropping port 13 by a casing receiving port 25. The carrier 30 is inserted inside the casing 21 and below the hopper dropping port 13 and the casing receiving port 25. The carrier 30 is provided with a loading unit 31 (loading chamber), and the loading unit 31 communicates with the hopper body 24 a via the hopper dropping port 13 and the casing receiving port 25. The transport body driving unit 50 is attached to the transport body 30 and slides the transport body 30 inserted through the casing 21 within the casing 21. In FIG. 1, the right side of the drawing is the backward side of the transport body 30 and the left side of the drawing is the forward side.

  The casing 21 has a casing receiving port 25 having substantially the same diameter as the hopper dropping port 13 on the upper surface, and a position separated from the casing receiving port 25 in the horizontal direction (a position on the front side in the conveying direction of the granular release agent 90). And the casing drop port 23 provided in the lower surface and the gas supply port 22 above the casing drop port 23 are provided. The position of the gas supply port 22 is not particularly limited as long as it is a structure that communicates with the loading portion 31 and the casing dropping port 23 of the transport body 30 when the transport body 30 moves forward (on the left side in FIG. 3). In the embodiment, the gas supply port 22 is provided with a known filter or silencer so that air in the atmosphere can be supplied. In another embodiment, a separate supply device may be provided at the gas supply port 22 to supply an active gas such as oxygen. In addition, when the conveyance body 30 is retracted (right side in FIG. 3), the loading unit 31 is closed by the peripheral surface of the casing 21 (the casing receiving port 25 is an opening). As in this embodiment, the casing receiving port 25 is provided on the lower side of the hopper dropping port 13, the casing dropping port 23 provided on the lower surface away from the casing receiving port 25 is provided, and the suction port 66 of the suction unit 61 is provided. In this structure, the particulate release agent 90 is sucked downward, and then is sent by air toward the horizontal position in the crossing direction. Therefore, it is effective to ensure the conveyance of the granular release agent 90 and the conveyance to a distant place, or to prevent crosslinking of the granular release agent 90. Therefore, as will be described later, the gas jetting part 62 is connected to the suction part 61 in the same horizontal positional relationship, and a commercially available Wonder Gun (registered trademark) is used for the gas jetting part 62. And

  The carrier 30 includes a loading unit 31 for loading the granular release agent 90 and a closing unit 32 provided adjacent to the loading unit 31 for closing the hopper dropping port 13 or the casing receiving port 25. The loading portion 31 is a cylindrical space in the vertical direction, and is surrounded by a closing portion 32, a loading end portion 33, and a side frame 34. Further, the closing portion 32 is provided so as to be sandwiched between the side frames 34 and in contact with the inner wall of the upper surface of the casing 21.

  Further, the transport body 30 includes an adjustment device 40 that varies the volume of the loading unit 31 by adjusting the position of the closing unit 32. The adjusting device 40 is fixed to the female screw 44 provided on the surface of the closing portion 32 in the forward direction of the transport body 30, the adjustment screw fixing frame 41 provided at the forward end of the transport body 30, and the adjustment screw fixing frame 41. And an adjustment screw 42 inserted into the female screw 44 of the closing portion 32.

  For example, a nut 43 can be used to fix the adjustment screw 42. Further, if necessary, the closing portion 32 and the side frame 34 are provided with grooves 35 and projections 36 that are fitted to each other and along the moving direction of the transport body 30 to prevent the closing portion 32 from coming off the side frame 34. can do.

  The transport body drive unit 50 is provided on an extension line in the backward direction of the transport body 30 and has a drive rod 51. The drive rod 51 is connected to the transport body 30 and can reciprocate the transport body 30 in the front-rear direction at an arbitrary timing. A ball spline, a pinion rack gear, a crank mechanism, various cylinders, and the like can be used for driving the drive rod 51. In the embodiment, an air cylinder is used. Compressed air is appropriately supplied to the air cylinder from the switching valve 4 through an air pipe.

  The injection device 60 is attached below the casing dropping port 23, and a gas jet that jets gas in a direction opposite to the suction portion 61 that sucks the particulate release agent 90 and the suction portion 61 in the piping of the injection device 60. Part 62, and an injection port 63 for injecting the gas ejected from gas ejection part 62 and granular release agent 90.

  The suction part 61 has a suction port 66 having a funnel-like shape, and the upper surface is fitted to the casing dropping port 23 with the same diameter as the casing dropping port 23. And it leads from the bottom of the suction port 66 to the horizontal direction, and continues to the gas ejection part 62 described later.

  A plurality of gas ejection parts 62 continuing from the suction part 61 are provided in the pipe of the injection device 60 in a circumferential shape and have ejection holes 64 for ejecting gas in the direction opposite to the suction part 61. Gas is ejected from the plurality of ejection holes 64, air is sucked from the gas supply port 22 by the gas flow, and ejected toward the ejection port 63. Then, the particulate release agent 90 is sucked and conveyed together with air. In the embodiment, a commercially available Wonder Gun (registered trademark) is used for the gas ejection portion 62. In the embodiment, the ejection hole 64 may be provided in the central portion inside the pipe in the direction opposite to the suction portion 61. That is, the form of the ejection hole 64 is not particularly limited as long as it is configured to eject gas in the direction opposite to the suction portion 61, that is, in the direction of the ejection port 63.

  Furthermore, the injection port 63 continuing from the gas ejection part 62 injects the granular mold release agent 90 toward the die casting machine 80 together with the gas ejected from the gas ejection part 62. The length of the injection port 63 is not particularly limited, and the pipe 72 can be appropriately connected as necessary.

  In the embodiment, compressed air is used as the gas ejected from the gas ejection section 62, but an active gas such as oxygen can also be used by providing a separate supply device. Accordingly, it is possible to easily realize the non-porous die casting method together with the above-mentioned supply device for active gas such as oxygen which can be provided in the gas supply port 22.

[Configuration of Example 2]
Next, Example 2 will be described. As shown in FIGS. 6, 9, and 10, the release agent supply device 1 has a charging device 70 connected to the injection port 63.

  The charging device 70 includes a connecting port 71 connected to the injection port 63, a charging port 75 for charging the granular mold release agent 90 into the pouring gate 83 of the die casting machine 80, and a pipe 72 for connecting the connecting port 71 and the charging port 75. Then, the charging port 75 has a charging port driving part 78 that enables the charging port 83 to move toward and away from the gate 83.

  The connection port 71 has a size corresponding to the injection port 63 and can be connected using a known socket joint, union joint, hose nipple, or the like. Further, the charging port 75 is configured to be smaller than the pouring gate 83 in order to feed the granular release agent 90 into the pouring gate 83 of the die casting machine 80.

  The pipe 72 communicates the connection port 71 and the input port 75, and has a connection port pipe 73 connected to the connection port 71 and an input port pipe 74 connected to the input port 75. The material, shape, size, and the like of the connection port pipe 73 are not particularly limited, but from the viewpoint of moving the input port 75 by the input port driving unit 78 described later in order to confirm the conveyance state of the granular release agent 90. A transparent pressure-resistant hose having flexibility is preferable. Further, the material, shape, size, and the like of the inlet pipe 74 are not particularly limited. However, the inlet pipe 74 is attached to the inlet driver 78 described later, and has heat resistance in order to accurately move the inlet 75 over the gate 83. From the viewpoint that it is preferable, a hard pipe made of metal or heat-resistant resin is preferable. But in order to confirm the conveyance state of the granular mold release agent 90, it is good also as a structure supported using a support material etc. using a transparent hose etc. similarly to the connection port piping 73. FIG. Note that the connection port 71 and the connection port pipe 73, and the input port 75 and the input port pipe 74 can be configured integrally.

  Further, as shown in FIG. 7, the pipe 72 in the vicinity of the inlet 75, that is, the inlet pipe 74 is formed of a hard pipe and has a bent portion 76, and the bent portion 76 to the inlet 75 are configured substantially vertically. You can also The bent portion 76 is bent at a substantially right angle, and the pipe wall corresponding to the arc outside the bent portion 76 is formed of a net material 77. The size of the mesh of the net material 77 is such that the gas injected from the injection port 63 escapes and the particulate release agent 90 does not pass. Further, by appropriately changing the size of the mesh of the mesh material 77 or by providing a shutter mechanism that can adjust the position of the mesh material 77 (not shown), from the gas mesh material 77 ejected from the ejection port 63. It is also possible to adjust the degree of omission.

  The input port drive unit 78 is attached to a stand or the like (not shown) and holds the input port pipe 74. In addition, the charging port drive unit 78 moves the charging port 75 over the gate 83 and retreats it. A ball spline, a pinion rack gear, a crank mechanism, various cylinders, or the like can be used as the driving means of the insertion port driving unit 78. In the embodiment, an air cylinder is used.

Since the configuration other than the input device 70 is the same as that of the first embodiment, the description thereof is omitted.

[Operation of Embodiment 1]
The operation of the first embodiment will be described. A granular release agent 90 is stored in the hopper 10 of the release agent supply apparatus 1. As shown in FIG. 3, normally, compressed air is supplied to A of an air cylinder, and the drive rod 51 and the conveyance body 30 are moving forward. As the carrier 30 moves forward, the loading unit 31 is below the hopper dropping port 13 and the casing receiving port, and the granular release agent 90 falls and is loaded into the loading unit 31 by its own weight.

  Next, as shown in FIG. 4, when compressed air is supplied to B of the air cylinder, the drive rod 51 and the conveying body 30 move backward. Then, the hopper dropping port 13 and the casing receiving port 25 are closed by the closing portion 32, and the loading unit 31 moves above the casing dropping port. Further, the compressed air is simultaneously supplied to the injection device 60 through a pipe (not shown) and ejected from the ejection hole 64 of the gas ejection section 62. As a result, the suction unit 61 and the loading unit 31 have a negative pressure, and air is sucked from the gas supply port 22 and conveyed from the injection port 63 together with the particulate release agent.

  After supplying the compressed air to the air cylinder B and the injection device 60 for a predetermined time, the compressed air is supplied again to the air cylinder A and the supply of the compressed air to the injection device 60 is stopped. Then, the ejection from the ejection hole 64 of the gas ejection part 62 stops, and the drive rod 51 and the conveyance body 30 return to the forward position as shown in FIG. This is repeated.

  As shown in FIG. 5, the adjusting method of the adjusting device 40 is to loosen the nut 43 and rotate the adjusting screw 42. Then, the insertion depth of the female screw and the adjusting screw 42 provided in the closing part 32 changes, and the position of the closing part 32 changes. After moving the closing portion 32 to a predetermined position, the adjustment screw 42 is fixed with the nut 43. By these operations, the volume of the loading unit 31 is varied, and the supply amount of the granular release agent 90 can be adjusted.

  Next, a usage example connected to the die casting machine 80 will be described. As shown in FIG. 8, the release agent supply device 1 is provided with an appropriate connection pipe 72 at the injection port 63 and connected to the die casting machine 80. After mold clamping, the granular mold release agent 90 is supplied to the cavity 85 together with the gas from the mold release agent input port 81 communicating with the cavity 85 through the injection port 63 and the connection pipe 72. At this time, the gas flowing into the cavity 85 is exhausted from the exhaust port 82 to the atmosphere or through a vacuum exhaust device (not shown). The release agent charging port 81 and the exhaust port 82 are appropriately opened and closed by valves not shown. In this embodiment, the present invention can be applied to both a cold chamber die casting machine and a hot chamber die casting machine.

  Further, as described in [Configuration of Embodiment 1], an active gas such as oxygen is provided by providing a separate supply device instead of the compressed air ejected from the gas ejection portion 62 and the air sucked from the gas supply port 22. Etc. can also be used.

[Operation of Embodiment 2]
Next, the operation of the second embodiment will be described. In addition, since operation | movement of the hopper 10, the measurement conveyance apparatus 20, and the injection apparatus 60 is the same as that of Example 1, description is abbreviate | omitted. As shown in FIG. 9, a cold chamber type die casting machine 80 supplies molten metal from a ladle 84 to a gate 83. In the die casting machine 80, when the molten metal is supplied from the ladle 84 to the gate 83, the charging port 75 is in the retracted position by the operation of the charging port driving unit 78. At that time, the granular release agent 90 is not supplied.

  Next, the molding in the die casting machine 80 is completed, the mold is opened, the die cast is taken out, and the mold is clamped. At that time, before the molten metal is supplied from the ladle 84 to the gate 83, as shown in FIG. 10, the inlet 75 is moved onto the gate 83 by the operation of the inlet driver 78. When the charging port 75 reaches the top of the gate 83, the granular release agent 90 is injected from the injection port 63 together with the gas, and is supplied to the gate 83 through the pipe 72 of the charging device 70. The granular mold release agent 90 supplied to the gate 83 is sucked through the sleeve 86 into a cavity 85 maintained at a negative pressure by a vacuum exhaust device of a die casting machine 80 (not shown).

  Here, when the release agent supply device 1 having the bending portion 76 and the net material 77 shown in FIG. 7 is used for the input pipe 74, the gas and the granular release agent 90 ejected from the injection port 63 are caused by the net material 77. To be separated. That is, the gas is discharged from the net material 77, and only the granular release agent 90 colliding with the net material 77 is supplied to the gate 83 by its own weight. However, the amount of gas discharged from the mesh material 77 can be adjusted by changing the mesh size of the mesh material 77 as described above or by providing an adjustable shutter mechanism for the mesh material.

  The above is the description of the release agent supply apparatus according to the present invention, but the present invention is not limited to the above-described embodiments, and a part of the configuration is appropriately changed without departing from the spirit of the invention. Can be implemented.

DESCRIPTION OF SYMBOLS 1 Release agent supply apparatus 10 Hopper 10a Hopper main body 13 Hopper drop opening 20 Metering conveyance apparatus 21 Casing 22 Gas supply opening 23 Casing drop opening 25 Casing receiving inlet 30 Conveyance body 31 Loading part 32 Closure part 40 Adjustment apparatus 50 Conveyance body drive part DESCRIPTION OF SYMBOLS 60 Injection apparatus 61 Suction part 62 Gas ejection part 63 Injection port 70 Injection apparatus 71 Connection port 72 Piping 75 Injection port 76 Bending part 77 Net material 78 Injection port drive part 90 Granular release agent

Claims (3)

A hopper for storing a release agent;
A casing receiving port that is attached to the lower side of the hopper dropping port of the hopper, a casing dropping port provided at a position apart from the casing receiving port, and a casing having a gas supply port, and can be moved forward and backward in the casing. A carrier having a loading portion for loading the release agent, a hopper dropping port provided adjacent to the loading portion, and a closing portion for closing the casing receiving port, and the carrier. , A metering and conveying device including a carrier driving unit that slides in the casing, a suction unit that is attached to the lower side of the casing dropping port, and sucks the release agent downward, and an intersection of the suction unit a gas blowout part for ejecting the gas toward the gas ejected from the gas ejection portion, and an injection device and a injection port for injecting a及Beryu JoHanare agent,
Release agent supply device composed of A connection port connected to the injection port, and inlet for introducing the particulate release agent sprue of the die casting machine, a pipe that communicates with the connecting port and the inlet, close the inlet to the sprue The mold release agent supply apparatus of Claim 1 which has an injection | throwing-in apparatus provided with the insertion opening drive part which can perform detachment | leave operation. The pipe of inlet of the feeding device is provided in a bent portion which is bent at right angles in together and composed of rigid pipe, the pipe wall corresponding to the outer arc of the bend portion is a network material, the bending mold release agent supply device according until inlet lead directly configured claim 2 than section.