JP2692358B2 - Multiple mold equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a multi-molding die apparatus having a plurality of product mating surfaces, and having a configuration in which these product mating surfaces are opened to take out products.

[Conventional technology]

Conventionally, in this type of multiple molding die apparatus, an intermediate mold is interposed between a fixed mold and a movable mold, and a sprue bush is provided from a fixed mounting plate of the fixed mold to a manifold in the intermediate mold. The molten resin that has passed through the sprue bush and the manifold is supplied into cavities formed on the product mating surfaces (parting lines) between the intermediate mold and the fixed mold and between the intermediate mold and the movable mold. It is supposed to be.

[Problems to be Solved by the Invention] By the way, in the conventional multi-molding die apparatus,
When the mold is opened, if the product between the fixed mold and the intermediate mold is opened and the product in the cavity is taken out, the sprue bush with a large diameter will be exposed between the fixed mold and the intermediate mold. As a result, there is a problem that the removal of the released product is not smooth.

The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent a large-diameter sprue bush from being exposed when the mold is opened, which is an obstacle to product removal. It is an object of the present invention to provide a multi-molding die device which can remove and take out a product extremely smoothly and surely in addition to the above-mentioned ones.

[Means for solving the problem]

In order to achieve the above object, the present invention provides a resin passage between a fixed die and an intermediate die, the resin passage in the intermediate die has a communication passage, and the fixed die and the intermediate die. A communication pin that communicates and blocks the resin passage is provided movably in the mold opening and closing direction, and an opening and closing pin that opens and closes the resin passage in the fixed mold faces the communication pin. It is movably installed in the opening and closing direction,
A drive pin for moving the communication pin is provided in the mold opening / closing direction in parallel with the communication pin, and a communication pin for moving the opening / closing pin in parallel with the opening / closing pin faces the drive pin to open / close the mold. It is provided so as to be movable in any direction.

[Action]

In the multi-molding die device of the present invention, the drive pin moves the communication pin and the opening / closing pin to the fixed mold side so that the resin passages of the fixed mold and the intermediate mold are communicated with each other through the communication passage of the communication pin. In addition, the drive pin returns the communication pin to the intermediate mold to shut off the intermediate mold resin passage, and the interlocking pin moves the open / close pin to close the fixed mold resin passage and perform mold opening.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

Reference numeral 10 in the drawing is a fixed die, and an intermediate die 20 is provided on the fixed die 10 so as to be openable and closable, and a movable die 30 is provided on the intermediate die 20 so as to be openable and closable.

The fixed mold 10 includes a fixed mounting plate 100 having a locate ring 100a, and first and second fixed mounting plates 100 mounted on the fixed mounting plate 100.
Fixed receiving plates 101 and 102, a fixed mold plate 103 attached to the second fixed receiving plate 102, and a fixed hollow body 104 mounted inside the first and second fixed receiving plates 101 and 102 and the fixed mold plate 103. A sprue bush 105 which is internally mounted on the fixed mounting plate 100 and which is mounted on the fixed hollow body 104 by a bolt 105a,
A filter 106 mounted on the fixed hollow body 104 side in the sprue bush 105 and a pair of mounting plates 108, 109 movably provided in the mold opening / closing direction in a cavity 107 formed inside the fixed hollow body 104. And these mounting plates 108 and 109
The spring 110 for urging to the 20 side, the opening / closing pin 111 and the interlocking pin 112 which can attach and detach the bases to the mounting plates 108 and 109, and can approach and separate from the intermediate die 20 side, and the fixed hollow body 10
The coil heater 113 provided on the outer periphery of the main body 4 is mainly configured. A fixed resin passage 114 is formed so as to penetrate through the sprue bush 105 and the fixed hollow body 104, and the intermediate die 20 side of the fixed resin passage 114 is opened and closed by the opening / closing pin 111. It is like this. The tip of the interlocking pin 112 has a fixed hollow body 1.
It appears to appear and disappear with respect to 04.

The intermediate die 20 includes an intermediate member 200 having a manifold 200a installed therein, a first intermediate receiving plate 201 and a first intermediate die plate 202 attached to the fixed die 10 side of the intermediate member 200, and the intermediate member 200. Second intermediate receiving plate 203 attached to the movable mold 30 side of the
And the second intermediate mold plate 204, and the first intermediate mold plate 202 and the first intermediate mold plate 204.
The intermediate hollow body 205 mounted inside the intermediate receiving plate 201 and having one end in contact with the manifold 200a, and the intermediate hollow body 205.
A coil heater 206 provided on the outer periphery of the intermediate hollow body 205, an intermediate resin passage 207 formed in the intermediate hollow body 205 and the manifold 200a, a communication pin 208 inserted in the intermediate resin passage 207 and the intermediate member 200, The drive pin 211 attached to the base of the communication pin 208 via the connecting plates 209 and 210 and inserted into the intermediate member 200 and the intermediate hollow body 205, and the connecting plate.
The piston rod 212 is connected to 210, and the second intermediate receiving plate 20
3 and a hydraulic cylinder 213 installed in the second intermediate mold plate 204. And the communication pin 20
A reduced diameter portion is formed from the front end side to the proximal end side of 8 and this reduced diameter portion serves as a communication passage 214. Also, the above communication pin 2
08 is arranged so as to face the opening / closing pin 111 while maintaining a slight clearance when the mold is closed, and the intermediate side resin passage 207 is communicated and blocked by the tip end of the communication pin 208. Further, the drive pin 211 is brought into contact with the tip end surface of the interlocking pin 112 when the mold is closed.

The movable die 30 is mainly composed of a movable die plate 300 and a movable receiving plate and a movable mounting plate (not shown).
Cavities for products are formed between the fixed mold plate 103 and the first intermediate mold plate 202 and between the second intermediate mold plate 204 and the movable mold plate 300, and the product matching surfaces ( Parting line) PL, and the cavity has a resin passage on the intermediate side of the manifold 200a.
The molten resin is supplied via 207.

Using the multi-molding die apparatus configured as described above,
When molding a product in each cavity, first, in a mold clamping state in which the fixed mold 10, the intermediate mold 20, and the movable mold 30 are closed to each other, the piston rod 212 of the hydraulic cylinder 213 is advanced to connect the connecting plates 210, 209. By moving the communication pin 208 and the drive pin 211 in the mold opening / closing direction (to the right in FIGS. 1 and 2), the interlocking pin 112 abutting the drive pin 211 is fixed to the fixed mounting plate 100 side. Pressed by the mounting plate 10
The opening / closing pin 111 also moves toward the fixed mounting plate 100 side against the biasing force of the spring 110 via 8,109. As a result, the fixed-side resin passage 114, which has been closed at the tip of the opening / closing pin 111, is opened, and the intermediate-side resin passage 207, which has been blocked at the tip of the communication pin 208, is communicated with the sprue. The molten resin supplied from the nozzle of the injection molding machine mounted on the bush 105 is fixed to the fixed resin passage 114 and the communication pin 20.
After passing through the eight communication passages 214 and the intermediate-side resin passage 207, each cavity is filled through the inside of each intermediate receiving plate 201, 203 and each intermediate template 202, 204.

Next, when the filling of the molten resin into each of the cavities is completed, the piston rod 212 of the hydraulic cylinder 213 is retracted, and the communication pin 208 and the drive pin 211 are moved to the movable die 30 side via the connecting plates 210 and 209. As a result, the interlocking pin 112, which has been pressed against the fixed mounting plate 100 side by the drive pin 211 until now, via the mounting plates 108 and 109, the spring 110
By being urged by, it moves to the movable die 30 side together with the drive pin 211. Therefore, the opening / closing pin 111 attached to the interlocking pin 112 via the attachment plates 108 and 109 also moves following the movement of the communication pin 208. As a result, the tip of the open / close pin 111 closes the outlet of the fixed resin passage 114 on the intermediate die 20 side, and the tip of the communication pin 208 blocks the inlet of the intermediate resin passage 207 on the fixed die 10 side. In this state, when the product in each cavity is cooled and solidified, the fixed mold 10, the intermediate mold 20, and the movable mold 30 are opened to each other, and the product is released and taken out. In this case, when the mold is opened, each resin passage 1 is opened by the open / close pin 111 and the communication pin 208.
Since 14,207 are closed to prevent leakage of the resin and the pins 111, 112, 208, 211 do not project between the fixed mold 10 and the intermediate mold 20, there is no obstacle to product release or removal.

A fluid pressure cylinder may be provided instead of the spring 110, but it is preferable to use the spring 110 because the temperature inside the fixed hollow body 104 becomes high.

〔The invention's effect〕

As described above, according to the present invention, the resin passage is formed between the fixed die and the intermediate die, the resin passage in the intermediate die has the communication passage, and the fixed and intermediate resin passages are provided. A communication pin that connects and disconnects the mold is provided movably in the mold opening and closing direction, and an opening and closing pin that opens and closes a resin passage in the fixed mold is provided in the mold in the mold opening and closing direction facing the communication pin. And a drive pin for moving the communication pin is provided in the mold opening / closing direction in parallel with the communication pin, and in parallel with the opening / closing pin.
Since the interlocking pin for moving the opening / closing pin is provided so as to be movable in the mold opening / closing direction facing the driving pin, the communication pin and the opening / closing pin are moved to the fixed mold side by the driving pin, and the fixed mold And the intermediate type resin passage is communicated through the communication passage of the communication pin to supply the resin,
By returning the communication pin to the intermediate mold by the drive pin, blocking the intermediate mold resin passage, and moving the open / close pin by the interlocking pin to close the fixed mold resin passage and perform mold opening, Unlike conventional sprue bushing, the sprue bush is not exposed, there is nothing that hinders product removal, and the product can be released and taken out very smoothly and reliably, and Resin can be easily supplied to the cavity during mold clamping, and problems such as resin leakage do not occur.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention.
The figure is a sectional view, and FIG. 2 is a sectional view of a main part. 10 ... Fixed type, 20 ... Intermediate type, PL ... Product mating surface (parting line), 111 ... Opening pin, 112 ... Interlocking pin, 114
... Fixed-side resin passage, 207 ... Intermediate-side resin passage, 208 ... Communication pin, 211 ... Drive pin, 214 ... Communication passage.

Claims (1)

(57) [Claims] 1. A plurality of product mating surfaces, each of which is opened to take out a product,
In a multi-molding die device in which a resin passage is formed between a fixed die and an intermediate die, a resin passage in the intermediate die has a communicating passage, and the resin passages of the fixed die and the intermediate die are communicated with each other. And a communication pin for shutting off is provided movably in the mold opening and closing direction, and an opening and closing pin for opening and closing the resin passage in the fixed mold moves in the mold opening and closing direction facing the communication pin. A drive pin that is freely provided and that moves the communication pin is provided parallel to the communication pin in the mold opening / closing direction, and an interlocking pin that moves the open / close pin parallel to the opening pin is the drive pin. A multi-molding die device, which is provided so as to be opposed to and movable in a mold opening / closing direction.