JPH09182937A - Wax pattern production device for precision casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity by rotating an index table loaded with plural dies and sequentially positioning the dies to a wax pattern forming machine and die opening/closing device. SOLUTION: When a position sensor of a rotating position detecting mechanism detects arrival of a part to be detected, driving of an index table 10 is stopped, at the same time, a cylinder of the positing mechanism is driven and a positioning pin is fitted into a positioning hole of a bracket 64, a position of the index table 10 is precisely indexed. At the same time, a cylinder of a connector connecting device is driven and a connector 71 is connected. By this method, when the wax pattern forming machine 20 is in forming, other dies 12 are opened/closed by a die opening/closing device 30, taking out of formed product and set up for next forming are made possible.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wax mold manufacturing apparatus for molding a wax mold for precision casting by injecting wax into a mold.

[0002]

2. Description of the Related Art Conventionally, when manufacturing a wax mold used for precision casting such as the lost wax method, a mold and a mold opening / closing device are attached to an injection molding machine, and the procedure is as follows. (1) Close the mold and inject wax into the mold with an injection molding machine. (2) Wait for cooling, open the mold, and take out the wax mold. (3) A mold release agent is applied to the inner surface of the mold to close the mold. (4) Repeat (1) to (3). Further, when manufacturing different wax molds, it was necessary to replace the mold attached to the injection molding machine before performing the above work.

[0003]

When a wax mold is manufactured by attaching a mold and its opening / closing device to one molding machine as in the conventional case, a loss for cooling time and a loss for setup are large. Especially, in the case of small-lot production of different kinds, there is a problem that the efficiency is very poor because it takes time to replace the mold.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a precision casting wax mold manufacturing apparatus for improving productivity.

[0005]

According to a first aspect of the present invention, in a wax mold manufacturing apparatus for molding a wax mold by injecting wax into the mold, a wax mold molding machine and a metal mold which are separately arranged apart from each other. A mold opening / closing device and a plurality of molds were mounted at intervals along the rotation direction, and were rotationally driven to sequentially position the molds on the wax mold forming machine and the mold opening / closing device. It is characterized by

According to a second aspect of the present invention, a fixed frame is provided around the index table, and one of the fixed frame and the index table is provided with a positioning pin that is projected by a drive mechanism, and the other is provided with a projected positioning pin. It is characterized in that a positioning hole for fixing the index table by fitting is provided.

The invention of claim 3 is characterized in that the index table and the fixed frame are respectively provided with connectors which relatively move toward each other and are fitted into each other when they are positioned.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view showing the overall configuration of the wax-type manufacturing apparatus 1, FIG. 2 is a front view thereof, and FIG. 3 is a side view thereof. This wax-type manufacturing apparatus 1 has an index table 10 that rotates in a horizontal plane. The index table 10 is housed in the circular hole 2 a on the upper surface of the fixed frame 2, and the drive mechanism 3 housed inside the fixed frame 2.
(See FIG. 3), it is rotationally driven intermittently in a fixed direction at a low speed. Reference numeral 4 in FIG. 3 denotes a support roller that supports the index table 10 so as to rotate stably.

On the upper surface of the index table 10, four molds 12 are fixed by a clamp mechanism 14 at equal intervals in the circumferential direction. Mold 12 and index table 1
Between 0, the positioning part 16 which fixedly sets the direction of the die 12 is provided.

On the circular path of the index table 10, the wax type molding machine 20 is spaced apart by 180 degrees in the circumferential direction.
And a mold opening / closing device 30 are installed, and by rotating the index table 10, one of the molds 12 can be positioned at the wax molding machine 20 and the other at the mold opening / closing device 30 at the same time. It has become. As shown in FIG. 3, the wax molding machine 20 and the mold opening / closing device 30 are
It is mounted on the arm 6 of the book.

As shown in FIG. 3, the wax molding machine 20 includes a wax injection head 22 for injecting the wax into the mold 12 by abutting against the mold 12 by descending, and a cylinder 24 for elevating and lowering it. Is equipped with. Further, the mold opening / closing device 30 is provided with a vertically movable frame 34 that is lifted and lowered by a cylinder 32 and provided with a gripping hook 36 that can be opened and closed. When the grip hook 36 is closed,
The upper die 1 of the die 12 including the upper die 12A and the lower die 12B
It has a function of gripping the flange of 2A, and the grip is released when the grip hook 36 is opened.

Further, the wax mold manufacturing apparatus 1 is provided with a mold release agent coating device 40 for applying a mold release agent to the inner surface of the mold 12 opened by the mold opening / closing device 30. The mold release agent applying device 40 includes a spray nozzle 42 that can freely enter from the horizontal direction between the upper mold 12A and the lower mold 12B opened by the mold opening / closing device 30, and a cylinder 42 that advances and retracts the spray nozzle 42. It has and.

Further, between the fixed frame 2 and the index table 10, a positioning mechanism 60 shown in FIG.
The connector connecting mechanism 70 shown in FIG. 6 and the rotational position detecting mechanism 80 shown in FIG. 6 are provided. Among the components of these mechanisms, the element on the fixed frame 2 side is the fixed frame 2
Index table 10 provided in one place somewhere
The elements on the side are respectively arranged for all the molds 12,
All of the molds 12 have the same positional relationship.

The positioning mechanism 60 includes a cylinder 62, which is an element on the fixed frame 2 side, a positioning pin 61 attached to the tip of the rod, a guide 63 for the positioning pin 61, and a positioning element, which is an element on the index table 10. And a bracket 64 with a hole 65. The positioning pin 61 is moved forwards and backwards in the radial direction of the index table 10 by the cylinder 62 and protrudes toward the index table 10 side to be fitted into the positioning hole 65 of the bracket 64, whereby the index table 1
Lock 0.

The connector connecting mechanism 70 includes the fixed frame 2
Side cylinder 73, connector 72 attached to the tip of the rod, index table 1
It is composed of a connector 71 which is an element on the 0 side. The connector 72 on the fixed frame 2 side is moved forwards and backwards in the radial direction of the index table 10 by the cylinder 73, and protrudes toward the index table 10 side.
Close to and connect. Thereby, for example, the signal system of the temperature sensor in the mold 12 or the electrical path of another electrical system is connected, or the hydraulic pressure or the cooling water path is connected.

The rotary position detecting mechanism 80 is provided in the fixed frame 2
The position detection sensor 81, which is an element on the side of the index table 10, and the detected body 82, which is an element on the side of the index table 10, are included. The detected object 82 is provided at four positions of the index table 10, and the position detection sensor 31 detects the detected object 82 when it comes to the facing position and emits a signal.

Next, the operation will be described. In this device, by rotating the index table 10, the mold 1 is sequentially rotated.
2 can be positioned on the wax molding machine 20 and the mold opening / closing device 30. That is, when the position detection sensor 81 of the rotational position detection mechanism 80 detects the arrival of the detected portion 82, the driving of the index table 10 is stopped, the cylinder 62 of the positioning mechanism 60 is driven, and the positioning pin 61 is attached to the bracket. 64 positioning holes 6
5, the position of the index table 10 is accurately determined. At the same time, the connector coupling device 7
The 0 cylinder 73 is driven and the connectors 71 and 72 are connected.

Therefore, while molding by the wax mold molding machine 20, the other mold 12 is opened and closed by the mold opening / closing device 30 to take out a molded product and set up for the next molding (application of a release agent, etc.). )It can be performed. Alternatively, while waiting for cooling after molding (between the wax mold molding machine 20 and the mold opening / closing device 30), molding is performed by the next mold 12, or another mold 1 is used.
The mold 2 can be opened and closed by the mold opening / closing device 30 to take out a molded product or to carry out the next molding setup, thereby improving the productivity. In this case, if different types of dies 12 are mounted on the index table 10, different wax dies are used for the dies 1.
2 can be efficiently produced without the need for the replacement.

Further, since the connectors 71 and 72 are fitted while the index table 10 is positioned, signals, power and cooling water are exchanged between the mold 12 and the outside via the connectors 71 and 72. It can be carried out.

[0020]

As described above, according to the invention of claim 1, by rotating the index table having a plurality of molds mounted thereon, the molds are sequentially positioned on the wax molding machine and the mold opening / closing device. can do. Therefore, while molding with a wax mold molding machine, you can open and close other molds to take out the molded product and set up for the next molding, or while waiting for cooling after molding, It is possible to perform molding with the mold described above, or to open and close another mold to take out a molded product and perform setup for the next molding, thus improving productivity. Also, when different types of dies are mounted on the index table, different wax dies can be efficiently produced without the need for die exchange.

According to the second aspect of the present invention, since the position of the index table is fixed by fitting the positioning pin and the positioning hole, the positioning can be performed accurately, and manual position adjustment becomes unnecessary.

According to the invention of claim 3, since the connector is fitted with the index table positioned,
Electrical signals, power such as hydraulic pressure, and cooling water can be exchanged between the mold and the outside via the connector. Therefore, no functional obstacle is caused by mounting a plurality of molds.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment.

FIG. 3 is a side view of the embodiment.

FIG. 4 is a configuration diagram of a positioning mechanism in the embodiment.

FIG. 5 is a configuration diagram of a connector connecting mechanism in the embodiment.

FIG. 6 is a configuration diagram of a rotational position detection sensor in the embodiment.

[Explanation of symbols]

 1 Wax mold manufacturing device 2 Fixed frame 10 Index table 12 Mold 20 Wax mold molding machine 30 Mold opening / closing device 61 Positioning pin 62 Positioning pin drive cylinder 65 Positioning hole 71, 72 Connector

Claims (3)

[Claims] 1. A wax mold manufacturing apparatus for molding a wax mold by injecting wax into the mold, wherein a wax mold molding machine and a mold opening / closing device which are separately arranged apart from each other, and a plurality of molds are rotated. Wax mold manufacturing for precision casting, characterized in that it is equipped with a wax mold molding machine and an index table for positioning the mold sequentially on the mold opening / closing device by being mounted at intervals along the direction and driven to rotate. apparatus. 2. A fixed frame is provided around the index table, and one of the fixed frame and the index table is provided with a positioning pin projected by a drive mechanism, and the other is fitted with the projected positioning pin. The wax mold manufacturing apparatus for precision casting according to claim 1, further comprising a positioning hole for fixing the index table. 3. An apparatus for producing a wax mold for precision casting, characterized in that the index table and the fixed frame are provided with respective connectors which move relatively toward each other and are fitted into each other when they are positioned. .