WO2022003885A1

WO2022003885A1 - Wax model injection molding method and wax model injection molding apparatus

Info

Publication number: WO2022003885A1
Application number: PCT/JP2020/025927
Authority: WO
Inventors: 深作安井
Original assignee: ＣＳＧＩｎｖｅｓｔｍｅｎｔｓ株式会社
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2022-01-06
Also published as: JPWO2022003885A1

Abstract

With a view to achieving a wax model injection molding method and a wax model injection molding apparatus, both of which enable efficient injection molding of a wax model and a shortening of working hours, a wax model injection molding method that comprises a step for clamping a rubber mold and then fitting a fill port of the rubber mold onto an injection nozzle 4, a step for discharging the rubber mold filled with wax resin out of a clamp part 5, and a step for feeding a next rubber mold into the clamp part 5 from which the filled-up rubber mold has been discharged, and a wax model mold injection apparatus for implementing said method, are both configured to be able to perform the two steps, which are the step for discharging the filled-up rubber mold out of the clamp part 5 and the step for feeding a next rubber mold into the clamp part from which the filled-up rubber mold has been discharged, as a single step for, as sequence of operations, moving, after a rubber mold is filled up with wax resin, a next rubber mold into the clamp part 5, pushing out and discharging the filled-up rubber mold out of the clamp part, and feeding a next rubber mold into the clamp part.

Description

Wax model injection molding method and wax model injection molding equipment

The present invention relates to a wax model injection molding method for molding a wax model used for lost wax casting and a wax model injection molding apparatus.

The lost wax casting method is known as one of the casting methods for complicated shapes such as metal accessories. Generally, in the lost wax casting method, a prototype to be manufactured is covered with silicon rubber or the like, a rubber mold is formed by vulcanizing the silicon rubber or the like, the rubber mold is divided and the prototype is taken out, and then the prototype is taken out. There is a process of filling the inside of the rubber mold with a wax resin and molding a wax model. The step of filling the inside of the rubber mold with a wax resin and molding the wax model is the step of the present invention.

Conventionally, as a means for molding a wax model, an injection nozzle for injecting wax resin is provided, and the device body for filling the rubber mold with wax resin and the device body for clamping the rubber mold and moving back and forth in the direction of the injection nozzle of the device body. , A wax model injection molding device provided with a clamping device for fitting and separating an injection port opening in a rubber mold and an injection nozzle is known (see, for example, Patent Document 1).

In such a wax model injection molding device, the following are generally used for supplying a rubber mold to a clamp device attached to the main body of the device and discharging a filled rubber mold filled with wax resin from the clamp device. It is done like this.

To supply the rubber mold to the clamp device, the rubber mold is pushed into the clamp portion of the clamp device from the rear to the front along the moving direction of the clamp device, and after the rubber mold is filled with the wax resin, the wax resin is supplied. The filled rubber mold is pulled out rearward from the inside of the clamp portion and discharged from the clamp device. Then, after the filled rubber mold is discharged from the clamp device, the next rubber mold is pushed into the clamp portion and supplied to the clamp device (see, for example, Patent Document 2).
Wax model injection molding is continuously performed while repeating this operation.

Japanese Patent No. 6059248 Japanese Unexamined Patent Publication No. 2007-237186

For example, in the case of lost wax casting that mass-produces products of the same shape such as metal accessories, it is necessary to prepare a large amount of wax models, and therefore, efficiency of wax model injection molding is required.

As a result of studying to improve the efficiency of wax model injection molding, the inventor supplies a rubber mold to the clamp device attached to the main body of the conventional wax model injection molding device and uses wax resin from the clamp device. Focusing on the fact that the filled rubber mold is discharged in two processes, supply and discharge, we came up with the idea of improving the efficiency of wax model molding by performing these two processes in one process. As a result of repeated test studies, the present invention has been completed.

An object of the present invention is to provide a wax model injection molding method and a wax model injection molding apparatus capable of efficiently performing wax model injection molding and shortening the time.

In order to achieve the above object, the invention according to claim 1 is to clamp a rubber mold having a hollow pattern internally by a clamping portion provided in the clamping device, and to use the rubber mold as a wax model injection molding apparatus. A step of fitting into an injection nozzle for injecting wax resin provided in the main body of the apparatus, a step of discharging a filled rubber mold filled with wax resin from the inside of the clamp portion, and a step of discharging the filled rubber mold in the clamp portion. This is a wax model injection molding method including a step of supplying the next rubber mold to a step of discharging the filled rubber mold from the inside of the clamp portion and a step of ejecting the next rubber mold into the clamp portion from which the filled rubber mold is discharged. In the two steps of supplying, after filling the rubber mold with the wax resin, the next rubber mold is moved into the clamp portion, the filled rubber mold is pushed out from the inside of the clamp portion and discharged, and the next rubber mold is discharged. Is one step performed by a series of operations so as to supply the rubber into the clamp portion.

According to the wax model injection molding method according to claim 1, there are two steps: a step of discharging the filled rubber mold from the inside of the clamp portion and a step of supplying the next rubber mold into the clamp portion from which the filled rubber mold is discharged. In one step, after filling the rubber mold with the wax resin, the next rubber mold is moved to the clamp portion, the filled rubber mold is pushed out from the inside of the clamp portion and discharged, and the next rubber mold is moved into the clamp portion. Since it is one step performed by a series of operations for supplying, it is possible to efficiently supply the filled rubber mold from the inside of the clamp portion to the next rubber mold in the clamp portion, and the filled rubber mold has been filled. It is possible to shorten the time from the discharge of the rubber mold to the supply of the next rubber mold.

According to the second aspect of the present invention, the rubber mold is clamped to the device main body for filling the rubber mold having a hollow pattern from the injection nozzle for injecting the wax resin to the rubber mold having a hollow pattern inside, and the rubber mold is clamped back and forth in the direction of the injection nozzle of the device main body. In a wax model injection molding device provided with an injection port that opens into a rubber mold and a clamp device that fits and separates the injection nozzle, the clamp device is a mold on which the rubber mold is placed and this. A clamp portion consisting of a clamp head that can move in the vertical direction with respect to the mold base is provided, and the clamp portion has a rubber mold in the clamp portion on one side in the left-right direction perpendicular to the front-back movement direction of the clamping device. A supply port for supplying is provided, a discharge port for discharging the filled rubber mold filled with wax resin from the inside of the clamp portion is provided on the other side, and the outside of the supply port of the clamp portion is inside the clamp portion. A waiting table that makes the rubber mold to be supplied stand by, a transport unit that conveys the rubber mold to the front of the waiting table, and rubber that moves in the left-right direction perpendicular to the moving direction of the clamping device and stands by in the waiting table. A rubber mold supply means for supplying a mold from the supply port to the inside of the clamp portion and a rubber mold transfer means for transferring the rubber mold conveyed by the transport portion to the standby table are provided, and the discharge port is provided with the inside of the clamp portion. The rubber mold transfer means is provided with a filled rubber mold cradle for receiving the filled rubber mold discharged from the rubber mold, and the rubber mold transfer means is provided with the injection port in which the clamping device moves forward in the direction of the injection nozzle and opens in the rubber mold. In the process in which the injection nozzle is fitted and the wax resin is injected and filled into the rubber mold from the injection nozzle, the next rubber mold conveyed by the transfer unit is transferred to the standby table. The rubber mold supply means is provided with the next rubber mold, which is transferred by the rubber mold transfer means and stands by on the standby table, during or after filling the rubber mold with the wax resin. After moving from the rubber mold supply port into the clamp portion and filling the rubber mold with the wax resin, the next rubber mold is pushed between the mold base of the clamp portion and the clamp head to clamp the filled rubber mold. It is characterized in that it is extruded from the inside of the portion and discharged from the discharge port to the filled rubber mold cradle, and the next rubber mold is placed at a predetermined position on the mold base of the clamp portion.

According to the wax model injection molding apparatus according to claim 2, the next rubber mold transferred by the rubber mold transfer means and waiting on the waiting table during or after filling the rubber mold with the wax resin is provided. After the rubber mold is moved into the clamp portion from the supply port provided in the clamp portion by the rubber mold supply means and the rubber mold is filled with the wax resin, the next rubber mold is transferred to the mold base of the clamp portion and the clamp head. The filled rubber mold is pushed out from the inside of the clamp portion to be discharged from the discharge port to the filled rubber mold cradle, and the next rubber mold is placed in a predetermined position on the mold base of the clamp portion. Can be done.
As a result, it is possible to efficiently supply the filled rubber mold from the inside of the clamp portion to the next rubber mold into the clamp portion by a series of operations, and from the discharge of the filled rubber mold to the next rubber mold. The time to supply can be shortened.

The invention according to claim 3 is the wax model injection molding apparatus according to claim 2, wherein the rubber mold transfer means provided on the supply port side of the clamp device is in the same direction as the moving direction of the clamp device. It is composed of a cylinder equipped with a cylinder rod that moves forward and backward, and by advancing the cylinder rod, the next rubber mold transported by the transport unit is extruded and transferred to the standby table at the tip of the cylinder rod. Further, the rubber mold supply means is composed of a cylinder provided with a cylinder rod that advances and retreats in a left-right direction perpendicular to the moving direction of the clamping device, and the cylinder rod is moved forward by the advancement of the cylinder rod. The next rubber mold waiting on the standby table at the tip of the cylinder is supplied from the supply port into the clamp portion.

According to the wax model injection molding apparatus according to claim 3, the rubber mold transfer means provided on the supply port side of the clamp device includes a cylinder rod that advances and retreats in the same direction as the movement direction of the clamp device. It is easy because it is composed of a cylinder, and by advancing the cylinder rod, the next rubber mold transported by the transport unit is extruded and transferred to the standby table at the tip of the cylinder rod. With such a configuration, the next rubber mold conveyed by the transfer unit can be reliably transferred to the standby table.
Further, the rubber mold supply means is composed of a cylinder provided with a cylinder rod that advances and retreats in a left-right direction perpendicular to the moving direction of the clamp device, and the advance of the cylinder rod causes the standby at the tip of the cylinder rod. Since the next rubber mold waiting on the table is supplied from the supply port into the clamp portion, the next rubber mold waiting on the standby table can be supplied into the clamp portion with a simple configuration. It can be reliably supplied.

According to the fourth aspect of the present invention, in the wax model injection molding apparatus according to the second or third aspect, the rubber mold is pushed between the mold base of the clamp portion and the clamp head by the rubber mold supply means. The next detection unit that detects that there is no rubber mold on the standby table and receives the detection signal from the first detection unit and operates the rubber mold transfer means to be transported by the transfer unit. Detection signals from the first control unit that transfers the rubber mold to the standby table, the second detection unit that detects that the rubber mold has been released after filling the rubber mold with wax resin, and the second detection unit. Then, the rubber mold supply means is operated to push the next rubber mold between the mold base of the clamp portion and the clamp head, and the filled rubber mold is pushed out from the inside of the clamp portion and filled from the rubber mold discharge port. It is characterized by having a second control unit for discharging the rubber mold to the finished rubber mold cradle and mounting the next rubber mold at a predetermined position on the mold base of the clamp portion.

According to the wax model injection molding apparatus according to claim 4, a series of operations is automatically and continuously performed from the discharge of the filled rubber mold from the inside of the clamp portion to the supply of the next rubber mold into the clamp portion. be able to.

As described above, according to the wax model injection molding method and the wax model injection molding apparatus according to the present invention, the filled rubber mold is efficiently supplied from the discharge from the inside of the clamp portion to the next rubber mold into the clamp portion. This can be done, and the time from the discharge of the filled rubber mold to the supply of the next rubber mold can be shortened, which can reduce the cost of the wax model injection molding.

It is the front view which showed the wax model injection molding apparatus which concerns on this invention, a part is omitted, and a part is a cross section. It is a left side view of the clamp device which omitted the apparatus main body in the wax model injection molding apparatus shown in FIG. 1. It is a perspective view which separated the apparatus main body and the clamp apparatus in the wax model injection molding apparatus shown in FIG. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold. It is explanatory drawing which shows the process of supplying the rubber mold to the clamp part of the clamp device, and discharging the filled rubber mold.

Hereinafter, embodiments of the wax model injection molding method and the wax model injection molding apparatus according to the present invention will be described.

First, an example of an embodiment of the wax model injection molding method will be described.
In the wax model injection molding method according to the present invention, the rubber mold having a hollow pattern inside is clamped by the clamp portion provided in the clamping device, and the rubber mold is clamped by the wax provided in the device main body of the wax model injection molding device. A step of fitting into an injection nozzle for injecting resin, a step of discharging a filled rubber mold filled with wax resin from the inside of the clamp portion, and a step of supplying the next rubber mold into the clamp portion from which the filled rubber mold is discharged. Includes the process of doing.

In this example, two steps, a step of discharging the filled rubber mold from the inside of the clamp portion and a step of supplying the next rubber mold into the clamp portion from which the filled rubber mold is discharged, are performed by waxing the rubber mold. After filling the resin, the next rubber mold is moved into the clamp part, the filled rubber mold is pushed out from the inside of the clamp part and discharged, and the next rubber mold is supplied into the clamp part. It is a process.

As described above, according to the wax model injection molding method of the present invention, there are two steps: a step of discharging the filled rubber mold from the inside of the clamp portion and a step of supplying the next rubber mold into the clamp portion from which the filled rubber mold is discharged. In one step, after filling the rubber mold with the wax resin, the next rubber mold is moved into the clamp part, the filled rubber mold is pushed out from the inside of the clamp part and discharged, and the next rubber mold is supplied into the clamp part. Since it is one step performed by a series of operations, it is possible to efficiently supply the filled rubber mold from the inside of the clamp part to the next rubber mold clamp part, and from the discharge of the filled rubber mold. It is possible to shorten the time until the next rubber mold is supplied.

Next, an example of the embodiment of the wax model injection molding apparatus that implements the wax model injection molding method will be described with reference to FIGS. 1 to 9.
FIG. 1 is a front view showing a part of the wax model injection molding apparatus of this example and a cross section thereof, and FIG. 2 is the left side surface of the clamp device in the wax model injection molding apparatus shown in FIG. 1 in which the apparatus main body is omitted. FIGS. 3 and 3 are perspective views in which the main body of the wax model injection molding apparatus shown in FIG. 1 and the clamp device are separated, and FIGS. 4 to 9 supply a rubber mold to the clamp portion of the clamp device to provide a filled rubber mold. It is explanatory drawing which shows the process of discharging.

The wax model injection molding device 1 of this example is composed of a device main body 2 and a clamp device 3 attached to the device main body 2.

The apparatus main body 2 is provided with a pressure tank for storing wax resin and a vacuum tank (not shown), and the injection nozzle 4 is provided so as to protrude to the outside. The apparatus main body 2 configured as described above is known (Patent No. 6059248), and in this example, the known apparatus main body is used.

The clamp device 3 includes a clamp portion 5 and a support base 6. The clamp portion 5 includes a mold 8 having a flat surface portion 8a on which the rubber mold 7 is placed, and a clamp head 9 that can move vertically with respect to the flat surface portion 8a of the mold base 8. In the clamp head 9, a support frame 10 is installed on a support base 6, and the clamp head 9 is supported by the support frame 10 so as to be movable in the vertical direction. For example, an air-driven cylinder 12 is installed on the upper plate portion 11 of the support frame 10. The cylinder rod 13 of the cylinder 12 can be raised and lowered so as to approach and separate from the flat surface portion 8a of the template 8 by driving the cylinder 12. A clamp head 9 is attached to the tip of the cylinder rod 13, and by lowering the cylinder rod 13, the rubber mold 7 mounted on the flat surface portion 8a of the mold 8 is pressed and fixed from above by the clamp head 9. It is designed to do.

In the rubber mold 7 which is placed on the flat surface portion 8a of the mold base 8 and fixed by the clamp head 9, the injection port 14 which opens into the rubber mold 7 faces the injection nozzle 4 protruding outward from the apparatus main body 2 and It is positioned and fixed so that it is located on the same axis.

Further, in this example, the clamp portion 5 is supported on the support base 6 so as to be movable back and forth in the direction of the injection nozzle 4 of the apparatus main body 2, and the clamp portion 5 clamping the rubber mold 7 is supported by the ejection nozzle of the apparatus main body 2. By moving it back and forth in four directions, the injection port 14 opening in the rubber mold 7 and the injection nozzle 4 are fitted and separated from each other.

As a means for movably supporting the clamp portion 5 on the support base 6, in this example, a groove-shaped portion 15 is formed on the lower surface of the clamp portion 5, and the upper surface of the support base 6 is slidably slidable on the groove-shaped portion 15. A protruding portion 16 to be fitted is formed, and the clamp portion 5 moves along the protruding portion 16, but is not particularly limited.

Further, as a means for moving the clamp portion 5, in this example, for example, an air-driven cylinder is installed in the apparatus main body 2 (not shown), and the tip of the cylinder rod 17 of the cylinder is attached to the clamp portion 5. The clamp portion 5 is connected and is moved back and forth in the two directions of the device main body by the cylinder rod 17 that moves forward and backward by the drive of the cylinder, but is not particularly limited.

Further, the clamp portion 5 is provided with a supply port 18 for supplying the rubber mold 7 into the clamp portion 5 on one side (left side in the drawing in this example) in the left-right direction perpendicular to the front-back movement direction of the support frame 10. A discharge port 19 for discharging the filled rubber mold 7a from the inside of the clamp portion 5 is provided on the other side (on the right side in the drawing in this example). The sizes of the supply port 18 and the discharge port 19 are not particularly limited as long as they do not interfere with the supply and discharge of the rubber mold 7.

On the supply port 18 side of the clamp portion 5, there is a flat surface portion 20a having the same surface position as the flat surface portion 8a of the mold base 8, and a standby base 20 for holding the rubber mold 7 to be supplied to the clamp portion 5 and rubber. The transport unit 21 that transports the mold 7 to the front of the standby table 20 and the rubber mold 7 that moves in the left-right direction perpendicular to the movement direction of the clamp unit 5 and stands by on the standby table 20 are transferred from the supply port 18 to the clamp unit 5. It is provided with a rubber mold supply means 22 for supplying to the inside and a rubber mold transfer means 23 for transferring the rubber mold 7 conveyed by the transfer unit 21 to the standby table 20.

The standby table 20 is connected to the mold table 8 and moves together with the clamp portion 5 as the clamp portion 5 moves. In this example, the transport unit 21 is composed of a belt conveyor 24, and the transport belt 26 mounted on the gantry 25 is provided so as to be adjacent to the standby stand 20, and the transport surface 26a of the transport belt 26 and the standby stand 20 are provided. The positions of the surfaces of the flat surface portion 20a of the above are the same height. The transport belt 26 is intermittently rotated by a drive means (not shown) to sequentially transport the rubber mold 7 to the front of the standby table 20.

In this example, the rubber mold supply means 22 is composed of an air-driven cylinder 27 provided with a cylinder rod 28 that advances and retreats in the left-right direction perpendicular to the moving direction of the clamp portion 5. Then, by advancing the cylinder rod 28, the rubber mold 7 waiting on the waiting table 20 by the push plate 29 provided at the tip of the cylinder rod 28 is pushed into the clamp portion 5 from the supply port 18 to be supplied, and the mold table 8 is supplied. It is designed to be positioned at a fixed position on the flat surface portion 8a. The cylinder 27 is fixed to the waiting table 20 by the fixing portion 30.

In this example, the rubber type transfer means 23 is composed of an air-driven cylinder 31 provided with a cylinder rod 32 that moves forward and backward in the same direction as the movement direction of the clamp portion 5. Then, by advancing the cylinder rod 32, the rubber mold 7 which has been conveyed to the front of the standby table 20 by the conveyor belt 26 of the belt conveyor 24 constituting the conveyor 21 by the push plate 33 provided at the tip of the cylinder rod 32. It is extruded and transferred to the waiting table 20. The cylinder 31 is fixed to the pedestal 25 of the belt conveyor 24 by the fixing portion 34.

Further, the discharge port 19 of the clamp portion 5 is provided with a filled rubber mold cradle 35 that is filled with the wax resin in the rubber mold 7 and receives the filled rubber mold 7a discharged from the clamp portion 5. In this example, the filled rubber mold cradle 35 is composed of a roller conveyor 36, and the roller conveyor 36 is installed so as to incline downward from the discharge port 19, and is discharged from the discharge port 19 to be discharged from the roller conveyor 36. The filled rubber mold 7a received above moves on the roller conveyor 36 and is sent to a predetermined place.

In the rubber mold transfer means 23 configured as described above, the clamp portion 5 moves forward in the direction of the injection nozzle 4 protruding from the apparatus main body 2 and opens in the rubber mold 7 clamped by the clamp portion 5. In the process where the injection port 14 and the injection nozzle 4 are fitted and the wax resin is injected and filled into the rubber mold 7 from the injection nozzle 4, or after filling, the next rubber mold 7b conveyed by the conveying unit 21 is waited for. It is designed to be transferred to the table 20.

Further, in the rubber mold supply means 22, the next rubber mold 7b transferred by the rubber mold supply means 22 and waiting on the waiting table 20 is clamped during or after filling the rubber mold 7 with the wax resin. After moving from the supply port 18 provided in the portion 5 into the clamp portion 5 and filling the rubber mold 7 with the wax resin, the next rubber mold 7b is pushed between the mold 8 and the clamp head 9 of the clamp portion 5. , The filled rubber mold 7a is pushed out from the inside of the clamp portion 5 and discharged from the discharge port 19 to the filled rubber mold cradle 35, and the next rubber mold 7b is placed at a predetermined position on the mold base 8 of the clamp portion 5. It has become like.

Further, in this example, in the clamp device 3, the rubber mold 7 is pushed between the mold base 8 of the clamp portion 5 and the clamp head 9 by the rubber mold supply means 22, and the standby base 20 does not have the rubber mold 7. Upon receiving the detection signals from the first detection unit 37 to detect and the first detection unit 37, the cylinder 31 is driven to advance the cylinder rod 32, and the rubber is conveyed to the supply port 18 side by the transfer belt 26 of the belt conveyor 24. The first control unit 38 that pushes out the rubber mold 7 and transfers it to the standby table 20, and the second detection unit that detects that the clamp of the filled rubber mold 7a is released after the rubber mold 7 is filled with the wax resin. In response to the detection signals from 39 and the second detection unit 39, the cylinder 27 is driven to advance the cylinder rod 28, and the next rubber mold 7b waiting on the standby table 20 is transferred from the supply port 18 into the clamp unit 5. The filled rubber mold 7a is pushed out from the inside of the clamp portion 5 and discharged from the discharge port 19, and the next rubber mold 7b is discharged from the mold portion 8 of the clamp portion 5. The second control unit 40 is provided at a fixed position on the flat surface portion 8a of the above.
The installation location of the first detection unit 37 and the second detection unit 39 is not limited to this example, and may be installed at any position as long as the detection can be performed.
Further, the second detection unit 39 of this example detects that the clamp of the filled rubber mold 7a is released by detecting that the cylinder 12 is driven and the cylinder rod 13 is raised. The release detection method is not limited to this example, and may be detected by another method.

Next, the process from the supply of the rubber mold 7 to the clamp portion 5 of the clamp device 2 to the discharge of the filled rubber mold 7a will be described with reference to FIGS. 4 to 9.

First, the cylinder 27 constituting the rubber mold supply means 22 is driven to retract the cylinder rod 28, and the cylinder 31 constituting the rubber mold transfer means 23 is driven to advance the cylinder rod 32 to advance the transport unit 21. The rubber mold 7 transported to the front of the standby table 20 is extruded by the transfer belt 26 constituting the standby table 20 and transferred to the standby table 20 (FIG. 4).

Next, the cylinder rod 32 of the rubber mold transfer means 23 is retracted, the cylinder rod 28 of the rubber mold supply means 22 is advanced, and the rubber mold 7 waiting on the standby table 20 is moved from the supply port 18 into the clamp portion 5. It is pushed into and supplied to a fixed position on the flat surface portion 8a of the mold 8.
In this process, the transport belt 26 of the transport unit 21 is driven to transport the next rubber mold 7b to the front of the standby table 20 (FIG. 5).

Next, the rubber mold 7 is clamped by the clamp portion 5, the cylinder rod 28 of the rubber mold supply means 22 is retracted, the clamp portion 5 is advanced toward the two apparatus main bodies in this state, and the rubber mold 7 is attached to the injection nozzle 4. The injection port 14 is fitted, and filling of the rubber mold 7 with the wax resin is started (FIG. 6).

Next, when the first detection unit 37 detects that the standby table 20 does not have the rubber mold 7, the clamp device 3 moves forward in the direction of the injection nozzle 4, and the injection port 14 and the injection nozzle 4 that open in the rubber mold 7 move forward. In the process of fitting and injecting and filling the rubber mold 7 with the wax resin, the cylinder 31 constituting the rubber mold transfer means 23 is driven to advance the cylinder rod 32, and the transfer belt 26 constituting the transfer portion 21 is used. The next rubber mold 7b that has been conveyed to the front of the standby table 20 is extruded and transferred to the standby table 20 (FIG. 7).

Next, the cylinder rod 28 of the rubber mold supply means 22 is advanced, and the next rubber mold 7b waiting on the standby table 20 is pushed into the clamp portion 5 (FIG. 8). The rubber mold 7b is pushed in by the force that the clamped rubber mold 7 does not move. In this example, the filling of the wax resin into the rubber mold 7 is completed, the clamp portion 5 is retracted to separate the injection nozzle 4 and the rubber mold 7, and then the next rubber mold 7b is moved into the clamp portion 5. Although pushing is performed, the next rubber mold 7b may be pushed during filling.

Next, the clamp of the filled rubber mold 7a is released, the cylinder rod 28 of the rubber mold supply means 22 is further advanced, and the filled rubber mold 7a is clamped by the next rubber mold b pushed into the clamp portion 5. It is extruded from the inside of 5 and discharged from the discharge port 19 to the filled rubber mold cradle 35, and the next rubber mold 7b is placed at a predetermined position of the mold base 8 of the clamp portion 5 (FIG. 9).
In this example, the cylinder rod 28 is advanced after the second detection unit 39 detects that the clamp of the filled rubber mold 7a has been released, but the next rubber mold 7b is pushed by the cylinder rod 28. Is continued from before the clamp of the filled rubber mold 7a is released, and when the clamp of the filled rubber mold 7a is released, the next rubber mold b is pushed into the clamp portion without being detected by the second detection unit 39. The filled rubber mold 7a may be discharged.
Next, the process returns to the process shown in FIG. 6, and the processes shown in FIGS. 6 to 9 are repeated.

As described above, according to the wax model injection molding apparatus of the present invention, the next rubber which is transferred by the rubber mold transfer means 23 and stands by on the waiting table 20 during or after filling the rubber mold 7 with the wax resin. The mold 7b is moved into the clamp portion 5 from the supply port 18 provided in the clamp portion 5 by the rubber mold supply means 22, and after the rubber mold 7 is filled with the wax resin, the next rubber mold 7b is transferred to the clamp portion 5. It is pushed between the mold 8 and the clamp head 9, and the filled rubber mold 7a is pushed out from the inside of the clamp portion 5 to be discharged from the discharge port 19 to the filled rubber mold cradle 35, and the next rubber mold 7b is discharged to the clamp portion 5. Can be placed in a predetermined position on the mold 8 of the above.

As a result, it is possible to efficiently supply the filled rubber mold 7a from the inside of the clamp portion 5 to the next rubber mold 7b into the clamp portion 5 by a series of operations, and from the discharge of the filled rubber mold 7a. It is possible to shorten the time until the next rubber mold 7b is supplied.

Further, in this example, the rubber type transfer means 23 provided on the supply port 18 side of the clamp portion 5 is composed of a cylinder 31 provided with a cylinder rod 32 that advances and retreats in the same direction as the movement direction of the clamp portion 5. By advancing the cylinder rod 32, the next rubber mold 7b transported by the transport unit 21 is transferred to the extrusion standby table 20 at the tip of the cylinder rod 32, so that the transport unit has a simple configuration. The next rubber mold 7b conveyed by 21 can be reliably transferred to the standby table 20.

Further, the rubber mold supply means 22 is composed of a cylinder 27 provided with a cylinder rod 28 that advances and retreats in a left-right direction perpendicular to the moving direction of the clamp portion 5, and is formed at the tip of the cylinder rod 28 by advancing the cylinder rod 28. Since the next rubber mold 7b waiting on the waiting table 20 is supplied from the supply port 18 into the clamp portion 5, the next rubber mold 7b waiting on the waiting table 20 has a simple configuration. Can be reliably supplied into the clamp portion 5.

Further, in this example, the first detection unit 37 that detects that the standby table 20 does not have the rubber mold 7 and the rubber mold transfer means 23 that receives the detection signal from the first detection unit 37 are operated by the transfer unit 21. The first control unit 38 that transfers the next rubber mold 7b that has been conveyed to the standby table 20, and the second that detects that the clamp of the filled rubber mold 7A is released after the rubber mold 7 is filled with the wax resin. Upon receiving the detection signal from the detection unit 39 and the second detection unit 39, the rubber mold supply means 22 is operated to push the next rubber mold 7b between the mold 8 and the clamp head 9 of the clamp unit 5, and the filled rubber is filled. A second control unit that pushes the mold 7a out of the clamp portion 5 and discharges it from the discharge port 19 to the filled rubber mold cradle 35, and mounts the next rubber mold 7b at a predetermined position on the mold base 8 of the clamp portion 5. Since the 40 is provided, a series of operations can be automatically and continuously performed from the discharge of the filled rubber mold 7a from the inside of the clamp portion 5 to the supply of the next rubber mold 7b into the clamp portion 5.

1 Wax model Injection molding device 2 Device body 3 Clamp device 4 Injection nozzle 5 Clamp part 6 Support 7 Rubber mold 7a Filled rubber mold 7b Next rubber mold 8 Mold base 8a Flat part 9 Clamp head 10 Support frame 11 Top plate part 12 Cylinder 13 Cylinder rod 14 Injection port 15 Groove type 16 Protruding part 17 Cylinder rod 18 Supply port 19 Discharge port 20 Standby 20a Flat part 21 Transport part 22 Rubber type supply means 23 Rubber type transfer means 24 Belt conveyor 25 Stand 26 Conveying belt 26a Conveying surface 27 Cylinder 28 Cylinder rod 29 Push plate 30 Fixed part 31 Cylinder 32 Cylinder rod 33 Push plate 34 Fixed part 35 Filled rubber mold cradle 36 Roller conveyor 37 1st detector 38 1st control unit 39 2nd Detection unit 40 2nd control unit

Claims

The process of clamping the rubber mold having a hollow pattern inside with the clamp part provided in the clamping device and fitting the rubber mold to the injection nozzle for injecting the wax resin provided in the injection molding device, and the wax resin In a wax model injection molding method including a step of discharging a filled filled rubber mold from the inside of the clamp portion and a step of supplying the next rubber mold into the clamp portion from which the filled rubber mold is discharged.
Two steps, a step of discharging the filled rubber mold from the inside of the clamp portion and a step of supplying the next rubber mold to the inside of the clamp portion from which the filled rubber mold is discharged, are performed after the rubber mold is filled with the wax resin. The rubber mold is moved into the clamp portion, the filled rubber mold is pushed out from the inside of the clamp portion and discharged, and the next rubber mold is supplied into the clamp portion. A wax model injection molding method characterized by that.
The rubber mold is clamped to the device body that fills the wax resin from the injection nozzle that ejects the wax resin to the rubber mold that has a hollow pattern inside, and moves back and forth in the direction of the injection nozzle of the device body to open the rubber mold. In a wax model injection molding device equipped with a clamping device that fits and separates the injection port and the injection nozzle.
The clamp device includes a clamp portion including a mold on which a rubber mold is placed and a clamp head that can move in the vertical direction with respect to the mold, and the clamp portion has a front-back movement direction of the clamp device. A supply port for supplying the rubber mold into the clamp portion is provided on one side in the orthogonal left-right direction, and a discharge port for discharging the filled rubber mold filled with wax resin from the inside of the clamp portion is provided on the other side. On the outside of the supply port of the clamp portion, there is a standby table for waiting for the rubber mold to be supplied into the clamp portion, a transport portion for transporting the rubber mold to the front of the standby table, and a moving direction of the clamp device. The rubber mold supply means that moves in the left-right direction and supplies the rubber mold that is waiting on the standby table from the supply port into the clamp portion and the rubber mold that has been conveyed by the transfer unit are transferred to the standby table. A rubber mold transfer means is provided, and the discharge port is provided with a filled rubber mold cradle for receiving the filled rubber mold discharged from the inside of the clamp portion.
In the rubber mold transfer means, the clamping device moves forward in the direction of the injection nozzle, the injection port opening in the rubber mold and the injection nozzle are fitted, and the wax resin is injected and filled into the rubber mold from the injection nozzle. In the process of being carried, the next rubber mold conveyed by the conveying unit is transferred to the waiting table.
The rubber mold supply means is provided with the next rubber mold, which is transferred by the rubber mold transfer means and is waiting on the standby table, in the clamp device during or after filling the rubber mold with the wax resin. After moving the rubber mold from the rubber mold supply port into the clamp portion and filling the rubber mold with the wax resin, the next rubber mold is pushed between the mold base of the clamp portion and the clamp head, and the filled rubber mold is pushed into the clamp portion. A wax model injection characterized in that it is extruded from the discharge port and discharged from the discharge port to the filled rubber mold cradle, and the next rubber mold is placed at a predetermined position on the mold base of the clamp portion. Molding equipment.
The rubber mold transfer means provided on the supply port side of the clamp device is composed of a cylinder provided with a cylinder rod that moves forward and backward in the same direction as the movement direction of the clamp device, and is formed by advancing the cylinder rod. At the tip of the cylinder rod, the next rubber mold transported by the transport unit is extruded and transferred to the standby table, and the rubber mold supply means is orthogonal to the moving direction of the clamp device. It is composed of a cylinder equipped with a cylinder rod that advances and retreats in the left-right direction, and by advancing the cylinder rod, the next rubber mold that is waiting on the standby table at the tip of the cylinder rod is clamped from the supply port. The wax model injection molding apparatus according to claim 2, wherein the device is supplied into a cylinder.
A first detection unit for detecting that the rubber mold is pushed between the mold base and the clamp head of the clamp portion by the rubber mold supply means and the standby table has no rubber mold, and the first detection unit. After receiving the detection signal from the first control unit that operates the rubber mold transfer means to transfer the next rubber mold conveyed by the transfer unit to the standby table, and after filling the rubber mold with the wax resin. , A second detection unit that detects that the rubber mold has been released, and a detection signal from the second detection unit are received, and the rubber mold supply means is operated to use the next rubber mold as the base of the clamp unit. The filled rubber mold is pushed out from the inside of the clamp portion and discharged from the rubber mold discharge port to the filled rubber mold cradle, and the next rubber mold is ejected from the predetermined rubber mold of the clamp portion. The wax model injection molding apparatus according to claim 2 or 3, further comprising a second control unit to be placed in a position.