KR101987900B1 - Fully Automatic Wax Injection Machine - Google Patents

Abstract

The present invention relates to a fully automatic wax injection machine (1), comprising a frame portion (2) forming a support body; A wax mixing unit 3 for receiving, melting and mixing wax to be used for injection; A wax injection part 5 for injecting the molten wax of the wax mixing part 3 into a mold M for model molding; A mold loading part 6 for placing the mold M in a state capable of being injected into a position adjacent to the nozzle tip 47 of the wax injection part 5; And a model ejection part 7 which pulls out a wax model of which molding is completed from the mold M opened by the mold loading part 6; and the wax injection part 4 is operated once. In the case, it is characterized in that the wax is injected only into the mold (M) by the amount already set, and thus can automate the entire process of injecting the wax model, it is possible to quantitatively control the amount of wax injected, The quality of the wax figure can be further improved.

Description

Fully Automatic Wax Injection Machine

The present invention relates to a fully automatic wax injection machine, and more particularly, in order to form a wax figure used for precision casting, etc., the entire process from melting the wax used as a material to the step of exporting the finished wax figure is performed. The present invention relates to an automated fully automatic wax injection machine.

In general, the precision casting that requires high dimensional accuracy includes the lost wax method, the carbon dioxide method, the show casting method, the cell mold method, etc. Among these, the lost wax method first makes a model using wax, and a ceramic material on the wax model Coating and hardening, and then casting the product in a precise form using the ceramic shell left as a mold by melting the wax model by heating at a high temperature, the wax injection machine as shown in Figure 1 (Patent No. 10-1479420). H).

As shown by reference numeral 101 in FIG. 1, the wax injection machine includes a stirring part 103, an injection part 105, a nozzle part 107, and the like, and is used in the stirring part 103. The wax of the mold is melted and injected into the mold M through the injection part 105 and the nozzle part 107 to form a wax model.

To this end, the wax of the solid body introduced into the stirring unit 103 is heated and melted by a plurality of heaters 113 installed in the stirring unit case 111. At this time, the wax is stirred by the stirring blades 115 to remove foreign substances such as moisture contained in the bubble form. Thereafter, the molten wax of the stirring unit 103 is injected into the mold M from the injection unit 105 via the injection line 165 and the nozzle unit 107, and is cooled for a predetermined time to complete molding into a wax model.

However, in the conventional wax injection machine 101 as described above, the worker opens and closes the mold (M) every time the molding of the model is completed, and prepares the next molding such as reinstalling the mold (M). Bars have to go through several tasks, there was a problem that the work efficiency is greatly reduced.

In addition, when the injection operation of the injection unit 105 or the nozzle unit 107 is controlled by the pressure applied to the nozzle tip 117, that is, the pressure transmitted inside the mold M after the injection is started reaches a set pressure. When the injection operation is to be stopped at the time, since the operation of the injection unit 105 or the nozzle unit 107 may be stopped by an increase in pressure due to the blockage of another part, for example, the injection line 165, the control of the injection operation is performed. There was a problem that can not be made stably.

Accordingly, the injection unit 105 or the nozzle unit 107 attempted to control the injection operation through time, but in this case, the injection operation when the set time has elapsed by measuring the elapsed time after the injection operation is started at the set reference time point. Therefore, when the wax flow rate varies depending on the degree of melting, i.e., faster than the expected value, an excessive amount of wax is injected into the mold M, and conversely, when the wax flow is slowed, A large amount of wax is injected to deteriorate the quality of the final model.

In particular, in the case of controlling the injection operation through time as described above, even when the injection amount of the mold (M) wax is more than the appropriate amount, the mold (M) must be maintained in the injection posture, so that the pressure to press the mold (M) during injection There was also a problem that the size and output of the auxiliary equipment must be unnecessarily increased for this purpose.

KR 10-1479420

The present invention has been proposed to solve the problems with the conventional wax injection machine as described above, except for the operation of loading the mold into the device and the operation of putting the solid wax of the raw material into the wax mixing unit as a preparation process before the start of the injection operation. By automating the whole process, the objective is to significantly improve the work efficiency of wax injection and the quality of the wax figures produced by injection.

In addition, by streamlining the control of the injection operation, there is another purpose to similarly improve the work efficiency of the wax injection and the quality of the wax model, and to reduce the size and weight of the equipment involved in the injection operation.

In order to achieve the above object, the present invention comprises a frame portion constituting the support body; A wax mixing part installed at one side of the frame part to receive, melt and mix wax to be used for injection; A wax injection unit connected to the discharge side of the wax mixing unit and injecting the molten wax into a mold to shape the molten wax into a model; A mold loading part for placing the mold in a state capable of being injected at a position adjacent to the nozzle tip of the wax injection part; And a model extractor for extracting a wax model from which the molding is completed from the mold opened by the mold loading part, wherein the wax injection part ejects the wax into the mold only by a predetermined amount in one operation. It provides a fully automatic wax injection machine.

In addition, the wax injection unit is connected to the discharge side of the wax mixing unit, the injection bundle for squeezing the molten wax injected from the wax mixing unit out of the wax mixing unit; And a nozzle bundle connected to the discharge side of the injection bundle and injecting the wax squeezed from the wax mixing portion by the injection bundle into the mold.

In addition, the injection bundle is connected to the discharge side of the wax mixing portion, the injection cylinder for temporarily receiving the molten wax injected from the wax mixing portion; An injection cylinder connected to the injection cylinder and installed to squeeze the wax temporarily contained in the injection cylinder into the nozzle bundle; And a position sensor installed inside the injection cylinder so as to be adjacent to the push rod of the injection cylinder, and measuring a moving distance of the push rod.

In addition, it is preferable that the injection bundle further comprises a graduation means formed in a line along the push rod so that the movement distance of the push rod by the position sensor.

The mold loading unit may include: a table installed at the frame part so as to be positioned in front of the nozzle tip to support the mold in a state capable of being injected; A pressing plate which is installed to face the table upward and downwardly presses the mold loaded on the table; And a loading cylinder installed on the frame part such that a push rod is connected to an upper surface of the pressure plate, and pressing or releasing the mold by lifting the pressure plate.

In addition, the table is provided with a table groove concavely processed on the upper surface in a direction orthogonal to the direction of movement of the nozzle bundle of the wax injection portion, so that the fixing projection protruding from the bottom of the mold, the pressing plate is the upper surface of the mold It is preferable to have a pressing plate groove concavely processed on the bottom side in parallel with the table groove so as to fit the lifting projection protruding in the.

The model extracting unit may include a rectangular gripper configured to grip the model of the mold in which molding is completed by a pair of hands arranged to face each other and horizontally moving in perspective; And a rectangular robot arm that moves the gripper in accordance with a rectangular coordinate system so that the model can be extracted from the mold.

According to the fully automatic wax injection machine of the present invention, since the entire process is automatically performed except for loading the mold into the mold loading unit and injecting the wax to be used for injection into the wax mixing unit, the efficiency of the injection operation can be greatly improved. .

In addition, since the amount of wax injection by the injection cylinder can be quantitatively controlled through a position sensor and a graduation means, the amount of wax injection into the mold can be kept constant, thus improving the quality of the final product, that is, the wax model. It can be improved.

In addition, since the amount of wax injection can be quantitatively controlled by the injection cylinder, there is no need to worry about a malfunction in which an excessive amount of wax is injected into the mold, so that the size of the loading cylinder can be prevented to prevent opening of the mold in preparation for such a malfunction. Since the output does not have to be excessively increased, the overall size and weight of the apparatus can be reduced.

1 is a view schematically showing a conventional wax injection machine.
Figure 2 is a side view of the fully automatic wax injection machine according to an embodiment of the present invention.
3 is a plan view of FIG.
4 is a front view of FIG. 2;
5 is an enlarged view of the injection bundle shown in FIG.
6 is a partially enlarged view showing a position sensor of the injection bundle.
7 is an enlarged view of the nozzle bunch shown in FIG. 2.
8 is a front view of FIG. 7;

Hereinafter, the fully automatic wax injection machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The wax injection machine according to the present invention, as shown by the reference numeral 1 in Figures 2 to 4, the frame portion 2, the wax mixing portion 3, the wax injection portion 5, the mold loading portion 6, The model release part 7 is comprised.

Here, first, the frame part 2 is a part constituting the support body of the wax injection machine 1, as shown in Figures 2 to 4, made of a plate body of various sizes and shapes, in particular the largest left and right It is preferable that the side plate 11 has a C shape in order to install the mold loading part 6 so as not to interfere with the operation of the model extraction part 7 which extracts the model F after shaping | molding from the metal mold | die M. . That is, by allowing the pressing plate 62 of the mold loading portion 6 to be disposed at the upper end of the open end of the side plate 11 and the table 61 of the mold loading portion 6 facing each other at the lower end of the opening end, The side plate 11 can load the mold M between the table 61 and the pressure plate 62, while the table 61, the pressure plate 62 or a related part extracts the model from the mold M. It is possible to prevent the interference of the operation of the outlet portion 7 at all.

The wax mixing part 3 is a part for melting and stirring the wax to be injected, as shown in FIGS. 3 and 4, which is installed at one side of the frame part 2, that is, at the left side of the drawing, a molten state. It is in the form of a container so as to contain the wax, and a heater of a direct or indirect heating method is installed on the outer wall or inside so as to be heated, and as shown in FIG. Is rotatably installed. Meanwhile, as shown in FIG. 5, the wax mixing unit 3 is provided with an injection tube 15 between the wax injection unit 5 at a lower end side thereof, and the wax is melted through the injection tube 15. It supplies to the wax injection part 5. However, a check valve is installed in the injection pipe 15 to prevent the molten wax injected into the injection bundle 8 of the wax injection unit 4 from flowing back into the wax mixing unit 3.

The wax injection unit 5 is a portion squeezing the molten wax injected from the wax mixing unit 3 into the mold M, as shown in FIGS. 2, 3 and 5, the injection bundle 8 And nozzle bundle 9. The injection bundle 8 is connected to the discharge side of the wax mixing unit 3 through the injection pipe 15, and is connected to the injection side of the nozzle bundle 9 through the discharge pipe 17. To this end, the injection bundle 8 is made to include the injection cylinder 21, the injection cylinder 23, and the position sensor 25 again, as shown in detail in Figures 5 and 6, the graduation means 27 It includes more.

Here, the injection cylinder 21 is a container means for receiving the molten wax injected from the injection bundle 8, as shown in FIG. 5, as shown in FIG. It is coupled to the front side, through the injection tube 15 injects the molten wax of the wax mixing section 3, temporarily received until the injected molten wax is squeezed, and the injection tube 15 at the tip to squeeze the received wax ) Is connected. In addition, the injection cylinder 23 is an extrusion means for pushing the wax temporarily accommodated in the injection cylinder 21 to the nozzle bundle 9, as shown in FIG. 5, which is installed side by side behind the injection cylinder 21. The molten wax filled in the injection cylinder 21 is squeezed out by the nozzle bundle 9 by reciprocating the plunger 33 at the tip of the push rod 31 along the inner circumferential surface of the injection cylinder 21.

In particular, the position sensor 25 is a measuring means for measuring the distance that the push rod 31 of the injection cylinder 23 is moved, as shown in enlarged in FIG. 6, for example, the injection cylinder to be adjacent to the push rod 31. Bar 23 is installed in the head cap 35 of the bar, by measuring the moving distance of the push rod 31 to check the moving distance of the plunger 33 so that the amount of wax discharged by the movement of the plunger 33 can be calculated do. Accordingly, the injection bundle 8 controls the moving distance of the push rod 31 according to one injection operation, thereby maintaining the amount of wax injected into the mold M according to one injection operation at a set value. . In addition, as shown in FIG. 6, the push rod 31 has a measuring means in a line, ie, in the axial direction, on the outer circumferential surface so that the movement distance of the push rod 31 by the position sensor 25 can be more accurately measured. 27) can be formed.

The nozzle bundle (9) is a conduit means for injecting the wax discharged from the above injection bundle (4) to the mold (M), as shown by the arrow (A) in Figure 3, the injection bundle (8) The discharge pipe 17 of is connected to one side, and the wax supplied from the injection bundle 8 is injected into the mold (M) through the nozzle 41 of the tip.

To this end, the nozzle bundle 9 includes the nozzle 41, the nozzle cylinder 43, and the lifting assembly 45, as shown in detail in Figs. 7 and 8, the position of the nozzle 41 It is possible to change up and down as well as before and after. Here, the nozzle 41, as shown in Figure 7, the tip of the nozzle tip 47 is opened toward the mold (M), the wax injected from the discharge pipe 17 is in the hollow inner space Filled temporarily. In addition, the nozzle cylinder 43 is pushed into the lifting plate 51 and supported by the nozzle frame 53 so as to be installed side by side behind the nozzle 41, as partially shown in Figs. By coupling the nozzle 41 to the tip of the rod 48, the nozzle 41 is advanced back and forth in accordance with the forward and backward movement of the push rod 48 so that the nozzle tip 47 is in contact with or separated from the locate ring of the mold. At this time, the nozzle 41 has a guide rod 49 is connected to the rear end to enable a more stable movement, the guide rod 49 extends in parallel with the push rod 48, as shown in FIG. 51, the nozzle 41 is guided stably. Finally, the elevating assembly 45 is to lift the nozzle cylinder 43 and the guide rod 41 up and down through the elevating plate 51, the elevating rod (57) to move up and down by the elevating motor (55) By connecting the elevating plate 51 to each other, the nozzle cylinder 43 and the guide rod 41 are raised and lowered, as well as the nozzle 41 connected to the tip thereof.

The mold loading part 6 is a means for placing the mold M to be used for wax injection on the wax injection machine 1 in a state capable of injection, and as shown in FIGS. 2 and 4, the nozzle bundle 9 The mold M is positioned at a position adjacent to the nozzle tip 47 to prepare an injection of wax into the mold M. FIG. To this end, the mold loading part 6 includes a table 61, a pressure plate 62, and a loading cylinder 63, as shown in Figs.

Here, the table 61 is a portion supporting the mold (M) used for injection, as shown in Figures 2 and 4, the frame portion 2, in particular, the side plate to be located in front of the nozzle bundle (9) Bar 11 is installed at the lower end of the open end, as shown in Figure 4, the table groove 66 is recessed in the upper surface so as to fit the fixing projections 65 protruding from the bottom of the mold (M). The table groove 66 is arranged in a direction orthogonal to the moving direction of the nozzle bundle 9. Therefore, as long as the fixing projection 65 is fitted into the table groove 66, the mold M can be stably held, even if pressed by the nozzle bundle 9, without being moved. On the other hand, the table 61 has a plurality of locking means 69 is arranged along the rim, the locking means 69 is equipped with a rotation ring 68 on the top. The pivot ring 68 is pivotally rotated while elastically moving up and down, so that the mold M and the mold lid are pressed by pressing the pressing piece 71 protruding from the side of the mold M, in particular, the mold lid MC. Hold MC) still.

In addition, the pressing plate 62 is a portion for pressing and positioning the mold M placed on the table 61 from the top during the injection and molding of wax, as shown in FIGS. 2 and 4, and the table 61. It is installed on the upper end of the open end of the side plate 11 to face the bar, during the wax injection strongly pressing down the mold (M) to maintain the original position despite the pressure by the nozzle bundle (9). At this time, the pressing plate 62 is made in the form of a square plate body, as shown in Figures 2 and 4, abuts on the upper surface of the cover (MC) of the mold (M), similar to the table 61, the mold cover (MC) Press plate groove 74 is recessed to the bottom in the direction parallel to the table groove 66 so as to fit the lifting projection 73 protruding on the upper surface of the). Therefore, the pressing plate 62 presses the mold M downward during the injection, but after the injection is completed, the pressing plate 62 lifts the mold cover MC upward through the lifting projection 73 caught by the pressing plate groove 74 to lift the mold M. Open.

Finally, the loading cylinder 63 is a means for elevating the pressure plate 62, as shown in FIGS. 2 and 4, facing the table 61 at the top of the frame part 2, in particular the side plate 11. Bar is mounted so that the front end of the push rod 75 is connected to the upper surface of the pressure plate 62, thereby elevating the pressure plate 62 to press or release the mold (M) through the pressure plate 62.

The model extracting part 7 is a part which pulls out the wax figure in which the molding is completed from the mold M, and as shown in FIGS. 2 to 4, the mold extracting part 7 is installed adjacent to the mold loading part 6, Various types of automated equipment may be applied regardless of the shape, method or size, as long as the molded wax figure can be extracted from the mold M opened by the whole 6. A rectangular robot is employed as is.

Thus, the model extractor 7 includes a right angle gripper 81 and a right angle robot arm 83, as shown in FIGS. 2 and 3. Here, the rectangular gripper 81 is a means for gripping the model in the mold M opened after the molding is completed, and as shown in FIG. 2, a substrate 84 mounted at the end of the rectangular robot arm 83. And a pair of hands 85 which are disposed to face each other on the substrate 84 and directly grip the model by perspectively moving in the horizontal direction. At this time, the hand 85 can also be changed in various ways, in this embodiment, take the form of a hook having a hook-shaped cross section.

In addition, the rectangular robot arm 83 is a transfer means for moving the gripper 81 according to the rectangular coordinate system, as shown in FIGS. 2 and 3, each of the first arms 87 disposed along the xyz axis; The gripper 81 is moved from the initial position to the target position and back to the initial position by the second arm 88 and the third arm 89 to discharge the model held by the gripper 81 from the mold M. To the side. At this time, as is well known, the first arm 87 is horizontally fixed to the external support end, the second arm 88 is orthogonally connected to the first arm 87 and slidably connected in the horizontal direction, The third arm 89 is slidably connected in the axial direction of the second arm 88 while being orthogonal to the second arm 88, which is arranged up and down relative to the second arm 88 according to the position of the mold M. You can also move relative to

Now, the operation of the fully automatic wax injection machine 1 according to the preferred embodiment of the present invention is as follows.

In order to produce a wax model by the wax injection machine 1 of the present invention, a solid wax is first introduced into the wax mixing unit 3. After the addition, the stirring blade 13 is driven while the wax mixing section 3 is heated to stir the solid wax simultaneously with melting. In this process, impurities such as moisture contained in the wax are removed in the form of bubbles.

After the stirring operation continues for a certain time, after the remaining bubbles are sufficiently removed, the mold M is loaded into the mold loading section 6 as a preparation work for wax injection. To this end, the lifting projection 73 protruding from the upper surface of the mold cover MC is inserted into the pressure plate groove 74, and the fixing projection 65 protruding from the bottom surface of the mold M is inserted into the table groove 66. Finish installing (M).

When the loading of the mold M is completed in this way, the loading cylinder 63 is operated to lower the pressure plate 62. To reduce the operation time, the loading cylinder 63 changes the operating speed in two sections of high speed and low speed. Doing. That is, the loading cylinder 63 descends at a high speed in the high speed section until the pressure plate 62 is somewhat closer to the mold M, and then descends at a low speed in the low speed section so that the mold cover MC and the mold M are lowered. Ensure stable integration. When the lowering of the pressure plate 62 is completed until the end of the low speed section, the loading cylinder 63 increases the pressing force on the pressure plate 62 to press the mold M downward.

Subsequently, when the pressing force of the loading cylinder 63 reaches the set value, the nozzle cylinder 43 of the nozzle bundle 9 starts to operate so that the nozzle 41 is advanced in the direction of the arrow B in FIG. 3 to the nozzle tip 47. ) Is inserted into the locating ring of the mold M as shown in FIG. At this time, since the nozzle cylinder 43 is not provided with the limit switch separately, it continues to move forward after the operation is started. As a result, after the nozzle 41 contacts the mold M, the nozzle cylinder 43 strongly presses the mold M, but the mold M is pressed downward by the loading cylinder 63 to be fixed. not moving. Accordingly, the fully automatic wax injection machine 1 of the present invention can control the starting point of the injection of the wax through time. That is, the nozzle cylinder 43 is continuously moved once it is operated, and since the nozzle tip 47 continues to press the nozzle 41 toward the mold M even after contacting the mold M, the nozzle cylinder 43 is operated. After a certain time has passed since the start, the injection of the nozzle tip 47 is determined to be in close contact with the mold M. Accordingly, the injection of wax is started in a state in which the nozzle tip 47 is in close contact with the mold M more strongly than when the nozzle tip 47 is sensed by the limit switch to stop the nozzle cylinder 43. You can do it.

When the preparation for injection is completed in this way, the injection cylinder 23 starts operation to squeeze the molten wax of the wax mixing section 3 into the nozzle bundle 9. At this time, the injection cylinder 23 measures only the amount of wax discharged by the plunger 33 in the injection cylinder 21 by measuring the distance that the push rod 31 is advanced by the position sensor 25. Allow injection. The wax discharged from the injection cylinder 21 is supplied to the nozzle 41 through the discharge tube 17, and injected into the mold M through the nozzle tip 47.

When the injection is completed, the molten wax injected into the mold M is cooled for a certain time to solidify, thereby completing molding of the wax model. At this time, the cooling time is controlled by a timer. In other words, after the cooling is started, the timer is operated to allow cooling for a predetermined time.

When the molding is completed, the injection cylinder 23 is first reversed so that the molten wax is no longer discharged from the injection cylinder 21. Then, the nozzle cylinder 43 is reversed to separate the nozzle tip 47 from the mold M. As shown in FIG. Then, the loading cylinder 63 is raised to separate the mold lid MC from the mold M to expose the molded wax figure to the outside.

Finally, the model extracting unit 7 operates to extract the model from the mold M. In FIG. 2, the mold M is positioned outside the mold loading unit 6 by the rotation of the table 61. As a result, the gripper 81 makes it easy to grasp and extract the model in the mold M. FIG. Thereafter, the gripper 81 finishes a series of molding operations by transferring the gripped model to the belt conveyor 91 shown in FIG. 2 along the Cartesian coordinates by the operation of the robot arm 83.

1: wax injection machine 2: frame part
3: wax mixing unit 5: wax injection unit
6: mold loading part 7: model extraction part
8: injection bundle 9: nozzle bundle
13: stirring blade 15: injection tube
17 discharge tube 21 injection cylinder
23: injection cylinder 25: position sensor
27: graduation means 31: push rod
33: Plunger 41: Nozzle
43: nozzle cylinder 45: lifting assembly
47: nozzle tip 51: lifting plate
61: table 62: pressure plate
63: loading cylinder 65: fixed protrusion
71: push 73: lifting projection
81: gripper 83: robot arm
85: Hand 91: Belt Conveyor
M: Mold MC: Cover

Claims (7)

delete delete A frame portion 2 constituting a support body;
A wax mixing part (3) installed at one side of the frame part (2) to receive and melt and mix wax to be used for injection;
A wax injection part 5 connected to the discharge side of the wax mixing part 3 and injecting the molten wax of the wax mixing part 3 into a mold M to form a model;
A mold loading part 6 for placing the mold M in a state capable of being injected into a position adjacent to the nozzle tip 47 of the wax injection part 5; And
And a model extracting unit 7 which extracts and transfers the wax model in which the molding is completed from the mold M opened by the mold loading unit 6;
The wax injection part 4 is configured to inject the wax into the mold M only by a predetermined amount in one operation.
The wax injection portion 5,
An injection bundle 8 connected to the discharge side of the wax mixing unit 3 to squeeze the molten wax injected from the wax mixing unit 3 out of the wax mixing unit 3; And
It is connected to the discharge side of the injection bundle 8, the nozzle bundle (9) for injecting the wax squeezed from the wax mixing unit 3 by the injection bundle 8 into the mold (M); including Done,
The injection bundle 8 is,
An injection barrel 21 connected to the discharge side of the wax mixing portion 3 to temporarily receive the molten wax injected from the wax mixing portion 3;
An injection cylinder 23 connected to the injection cylinder 21 and installed to squeeze the wax temporarily contained in the injection cylinder 21 into the nozzle bundle 9; And
And a position sensor (25) installed inside the injection cylinder (23) to be adjacent to the push rod (31) of the injection cylinder (23) to measure a moving distance of the push rod (31). Fully automatic wax injection machine. The method according to claim 3,
The injection bundle 8 further comprises a graduation means 27 formed in a line along the push rod 31 so that the movement distance of the push rod 31 can be confirmed by the position sensor 25. Fully automatic wax injection machine. The method according to claim 3,
The mold loading portion 6,
A table 61 installed in the frame part 2 so as to be positioned in front of the nozzle tip 47 to support the mold M in an injection-molded state;
A pressing plate (62) installed to face the table (61) above and pressing down the mold (M) loaded on the table (61); And
The loading cylinder 63 is installed on the frame portion 2 so that the push rod 75 is connected to the upper surface of the pressing plate 62, and presses or releases the mold M by lifting the pressing plate 62. Fully automatic wax injection machine comprising a. The method according to claim 5,
The table 61 is recessed on the upper surface in a direction orthogonal to the moving direction of the nozzle bundle 9 of the wax injection part 5 so as to fit the fixing protrusion 65 protruding from the bottom of the mold M. Table groove 66 is provided,
The pressing plate 62 is provided with a pressing plate groove 74 which is concavely processed on the bottom in parallel with the table groove 66 so as to fit the lifting projection 73 protruding from the upper surface of the mold (M). Fully automatic wax injection machine. The method according to claim 3,
The model output unit 7,
A right angle gripper (81) which grips the model of the mold (M) that is completed by forming a pair of hands (85) arranged to face each other and moving horizontally in perspective; And
And a rectangular robot arm (83) for moving the gripper (81) according to a rectangular coordinate system so that the model can be extracted from the mold (M).

Images