JP2754852B2 - 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 above-mentioned conventional multiple 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.

Then, the present inventors have developed a new multiple molding die apparatus in order to solve the above-mentioned conventional problems. In this multiple molding die apparatus, a resin passage is formed between the fixed mold and the intermediate mold, and a communication passage is provided between the resin passage in the fixed mold and the resin passage in the intermediate mold, and A communication pin for communicating and blocking the two resin passages is provided movably in the mold opening and closing direction. Therefore, when the mold is opened, only the small diameter communication pin is exposed instead of the large diameter sprue bush, which has been exposed between the conventional fixed mold and the intermediate mold, and the structure of the mold is simplified. Now you can afford to incorporate various mechanisms inside.

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform two-color molding smoothly and reliably, which has been conventionally not performed at all due to space limitations in a mold. It is an object of the present invention to provide a multi-molding die apparatus capable of performing the same.

[Means for solving the problem]

In order to achieve the above object, a multi-molding die apparatus of the present invention comprises a fixed mold having a sprue bush for a primary resin material and a sprue bush for a secondary resin material, and a movable mold, which is provided between a fixed mold and a movable mold. An intermediate mold having a manifold in which a passage and a passage for a secondary resin material are formed is interposed, and a primary resin material and a secondary resin material are separated from the passage for the primary resin material and the passage for the secondary resin material in the manifold. Are respectively formed in the primary resin material filling space and the secondary resin material filling space of the respective cavities formed on the plurality of product mating surfaces between the intermediate mold and the fixed mold and between the intermediate mold and the movable mold. A multi-molding die apparatus that is supplied and configured to take out a product by opening each of these product mating surfaces, wherein the fixed mold and the movable mold are movable in the mold opening and closing direction, A movable mold body that closes the secondary resin material filling space when advanced toward the cavity is provided corresponding to each cavity, and the fixed mold extends in a mold opening and closing direction, and one end of each extends in the middle. One end of each of the first and second fixed-side pin fitting holes opened on the mold side, and the sprue bush for the primary and secondary resin materials, respectively, and the other end thereof is the first and second fixed portions. First and second fixed-side resin passages are formed in the middle of the side-pin insertion hole and communicate with each other from the side. The first and second fixed-side resin passages extend in the opening and closing direction of the intermediate mold, and one end of each of the fixed-side pin insertions. First and second intermediate pin insertion holes are formed, each communicating with one end of the hole, and each other end communicating with the primary resin material passage and the secondary resin material passage of the manifold, respectively. First and second communication pins having communication passages formed along the axial direction at portions other than the end portions are provided so that each tip portion is inserted into the first and second fixed-side pin insertion holes in the mold opening and closing direction. First and second passage opening / closing mechanisms respectively inserted into the first and second intermediate pin insertion holes while being movably fitted therein, and further allowing the respective communication pins to individually advance and retreat in the axial direction. The first passage opening / closing mechanism advances the first communication pin to move the first fixed side resin passage during the primary molding in which each movable mold body moves forward to close the secondary material filling space of each cavity. While the second passage opening / closing mechanism retracts the second communication pin and closes the other end of the second fixed-side resin passage at the front end thereof. The passage opening and closing mechanism is the first
The other communication pin is retracted to close the other end of the first fixed-side resin passage, while the second passage opening / closing mechanism advances the second communication pin to open the other end of the second fixed-side resin passage. It is characterized by doing.

[Action]

In the multiple mold apparatus of the present invention, many cavities can be formed in one mold apparatus.

When the communication pin is in the forward position by the passage opening / closing mechanism, the fixed resin passage and the resin material passage of the manifold communicate with each other via the communication pin communication passage, and the fixed resin passage is melted into the manifold from the fixed resin passage. The resin can be supplied, and when the communication pin is at the retracted position, the distal end thereof cuts off the communication path between the communication pin and the fixed resin passage. And, after the mold is opened, only the small diameter communication pin is exposed between the fixed mold and the intermediate mold,
This communication pin does not cause injury during product removal.

〔Example〕

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

FIG. 1 shows a cassette half multi-molding die apparatus according to an embodiment of the present invention. As shown in FIG. 2, a cassette half C has a band-shaped transparent portion 1 formed at a central portion.
And colored portions 2, 3 formed on both sides of the transparent portion 1,
And a pair of connecting portions 4 for connecting the colored portions 2 and 3 to each other. Submarine gate marks 6 at the time of primary molding are formed on a pair of upright edges 5 on the front surface of the colored portion 3, and a triangular valve gate mark 7 is formed at the center of the outer surface of the transparent portion 1. Are formed.

As shown in FIG. 1, a multi-molding mold apparatus for two-color molding of the cassette half C configured as described above has a fixed mold half.
An intermediate mold 20 is provided for opening and closing with respect to 10, and a movable mold 30 is provided for opening and closing with respect to this intermediate mold 20.

The fixed die 10 includes a fixed mounting plate 102 having a locate ring 100, 100 'and sprue bushes 101, 101' (a sprue bush for a primary resin material and a sprue bush for a secondary resin material, respectively), and a spacer 103 on the fixed mounting plate 102.
Fixed receiving plate 104 attached through the
A fixed mold plate 105 attached to the base plate; first, second, and third protruding plates 106, 107, and 108 provided movably in the mold opening and closing direction between the fixed mounting plate 102 and the fixed receiving plate 104; Plank106
, And a projecting pin 109 having a base attached to
2. It mainly includes fixed cylindrical bodies 110 and 110 'which are loosely fitted to the third protruding plates 106 to 108 and which are inserted through the fixed receiving plate 104 and the fixed mold plate 105. Then, from the intermediate mold 20 side of the fixed cylindrical bodies 110, 110 ', mounting holes 111, 111' (first and second fixed side pins, respectively) for fitting communication pins 40, 40 '(first and second communication pins, respectively). (Fixing side resin passages 112, 1) formed with fitting holes 111, 111 '.
12 '(the first and second stationary resin passages respectively)
The fixed cylinder 110, 110 'and the sprue bush 101, 101'
It is formed penetrating inside. Each of the sprue bushes 101, 101 'is provided with a pair of injection molding machine nozzles for supplying a primary injection material (colored resin) and a secondary injection material (transparent resin).

The intermediate mold 20 includes an intermediate member 201 having a manifold 200 mounted therein, and first and second intermediate receiving plates 202 and 203 and third and fourth intermediate receiving plates 204 and 205 attached to both sides of the intermediate member 201.
And the intermediate template 2 attached to these intermediate receiving plates 203 and 205.
06, 207 and the first and second intermediate receiving plates 202, 203 and the intermediate template 206, and the through holes 208, 208 'for inserting the communication pins 40, 40' (the first and second intermediate pins are respectively inserted). Holes 209, 209 'provided with the through holes 210, 21 which are attached to the intermediate member 201 and for fitting the communication pins 40, 40'.
0 ', an annular body 211, 211', and the intermediate member 201, third,
The communication pins 4 are mounted in the fourth intermediate receiving plates 204 and 205 and
Passage opening / closing mechanism to move 0,40 'movably in the mold opening / closing direction
212, 212 '(first and second passage opening and closing mechanisms, respectively)
And the fourth and third intermediate receiving plates 205 and 204, the intermediate member 201, the manifold 200, the first and second intermediate receiving plates 202 and 203, and the intermediate template 20.
It is mainly configured with a valve gate mechanism 213 that movably operates the movable pin 50 inserted in 6 in the mold opening / closing direction. Communication grooves 41, 41 'as communication passages are formed in portions other than the distal ends of the communication pins 40, 40' so as to extend in the axial direction, and operate the hydraulic pressure of the passage opening / closing mechanisms 212, 212 '. Accordingly, when the communication pins 40, 40 'are in the retracted position, the communication grooves 41, 41' of the communication pins 40, 40 '
When the communication pins 40 and 40 'are in the forward position, the fixed resin passages 1 and 110' of the fixed cylindrical bodies 110 and 110 'are closed.
12,112 ', the communication grooves 41, 41' of the communication pins 40, 40 ', and the intermediate resin passages 214, 214' (the primary resin material passage and the secondary resin material passage) formed in the manifold 200, respectively. It has become. In addition, the fourth and third intermediate receiving plates 20
5, 204, the intermediate member 201, and the lower surfaces of the first and second intermediate receiving plates 202 and 203 are provided with a sliding mechanism 215 for slidingly supporting the intermediate mold 20.

The movable mold 30 includes a movable mold plate 300, a movable receiving plate 301 attached to the movable mold plate 300, a movable mounting plate 303 attached to the movable receiving plate 301 via a spacer 302, First, second, and third protruding plates 304, 305, and 306 movably provided in the mold opening and closing direction between the plate 303 and the movable receiving plate 301, and a protruding pin 307 having a base mounted on the protruding plates 304 to 306.
And the subject. And the fixed mold plate
105 and the intermediate template 206 and between the intermediate template 207 and the movable template 300
Cavities for cassette half C
60, 60 'are formed, each of which is a product mating surface (parting line) PL.

Further, the fixed mold plate 105 and the fixed receiving plate 104 and the movable mold plate 300 and the movable receiving plate 301 have the cavities 60 and 6 respectively.
The movable type bodies 70, 70 'provided to be able to protrude and retract in 0' and the movable receiving plates 71, 71 'connected to the movable type bodies 70, 70' are provided therein. The movable mold bodies 70, 70 'are moved to the cavities 60, 6 within a range in which the hydraulic cylinders 71, 71' are locked by stoppers 72, 72 'by hydraulic cylinders (not shown).
It protrudes into 0 '. And, at the time of the primary molding, each of the moving receiving plates 71, 7
1 ′ and the movable molds 70, 70 ′ are advanced, and each movable mold 70, 7
0 ′ is in close contact with the intermediate mold plates 206, 207 to close the space for filling the secondary injection material, and at the time of the secondary molding, the respective moving receiving plates 71, 7
The 1 'and movable molds 70, 70' are configured to be separated from the respective intermediate mold plates 206, 207 to form a secondary filling material filling space.

The primary injection material in the intermediate resin passage 214 of the manifold 200 includes an intermediate member 201, first and second intermediate receiving plates 202 and 203, third and fourth intermediate receiving plates 204 and 205, and an intermediate mold plate 20 respectively.
6,207 passes through the bush 216
The fluid is supplied into the cavities 60, 60 'via a passage formed between the fixed mold plate 105 and the fixed mold plate 105 and the intermediate mold plate 207 and the movable mold plate 300 and a submarine gate. The valve gate mechanism 213 opens and closes the inlet (gate) into the cavity 60 by the tip of the movable pin 50 by operating the hydraulic pressure. When the gate is opened, the intermediate side in the manifold 200 is opened. From the resin passage 214 ', the intermediate member 20
1, the first and second intermediate receiving plates 202 and 203, through the bush 217 attached to the intermediate template 206, the secondary injection material in a molten state,
It is designed to be injected into the cavity 60 through a gate. Although not shown, the valve gate mechanism 213 has the same configuration, that is, the second and first intermediate receiving plates 203 and 202, the intermediate member 201, the manifold 200, the third and
By moving the movable pins 50 inserted in the fourth intermediate receiving plates 204 and 205 and the intermediate template 207 in the mold opening and closing direction, the cavity 60 ′ formed between the intermediate template 207 and the movable template 300 is What injects injection material is installed.

When two-color molding of the cassette half C is performed by using the multi-molding die apparatus configured as described above, first, in the mold clamping state as shown in FIG. After being in close contact with the intermediate mold plates 206 and 207, the communication pin 40 of the passage opening / closing mechanism 212 is advanced, and the fixed resin passage 112 and the communication pin 4
0 communication groove 41 and the intermediate resin passage 21 in the manifold 200.
Connect with 4. Thus, the molten primary injection material (colored resin) injected from the injection molding machine mounted on the sprue bush 101 passes through the resin passage 112 and the communication groove 41, reaches the resin passage 214 in the manifold 200, further,
It is supplied into each bush 216, and is filled with the secondary injection material by each of the movable molds 70, 70 'through the passage between the intermediate molds 206, 207 and the fixed mold 105, the movable mold 300 and the submarine gate. The space is injected into the closed cavities 60, 60 '. As a result, the primary injection material is filled in the order of the colored portion 3, the communicating portions 4, 4 and the colored portion 2, and the primary molding is completed.

Next, the process proceeds to the secondary molding.First, the movable mold bodies 70, 70 'are separated from the intermediate mold plates 206, 207, and the communication pins 40' of the passage opening / closing mechanism 212 'are formed in a state where the secondary injection material filling space is formed. By moving forward, the fixed resin passage 112 ′ communicates with the communication groove 41 ′ of the communication pin 40 ′ and the intermediate resin passage 214 ′ in the manifold 200. As a result, the molten secondary injection material (transparent resin) injected from the injection molding machine mounted on the sprue bush 101 ′ flows into the resin passage 11.
2 ', through the communication groove 41', to the resin passage 214 'in the manifold 200, and further supplied into the bush 217. In this state, when the movable pin 50 is retracted by the valve gate mechanism 213, the gate closed up to now by the movable pin 50 is opened and the cavity 60, 60 'is filled with the secondary injection material.

Subsequently, when the secondary molding is completed, the valve gate mechanism 21
3, the movable pins 50 are moved forward to close the gate, and the passage pins 40, 40 'are retracted by the passage opening / closing mechanisms 212, 212', so that the fixed resin passages 112, 112 'and the communication pins 40, 4
The communication state between the 0 'communication grooves 41 and 41' is cut off. further,
When the products in the cavities 60, 60 'are cooled and solidified, the fixed mold 10, the intermediate mold 20, and the movable mold 30 are opened to each other, and the products in the cavities 60, 60' are fixed to the fixed mold plate 105 and the movable mold plate 105.
Since they adhere to the 300 side, each protruding plate 106-108, 304-306
Are moved toward the intermediate mold 20, respectively, so that the products adhering to the mold plates 105, 300 are reliably protruded by the projecting pins 109, 307, and are released smoothly and released.

In this case, the fixed mold plate 105 of the fixed mold 10 and the intermediate mold plate 206 of the intermediate mold 20 are separated by a predetermined distance, but the communication pins 40, 40 'are exposed between these mold plates 105, 206. Therefore, the two-color molded cassette half C can be easily taken out, and the communication pins 40 and 40 'do not hinder the product taking out.

〔The invention's effect〕

Since the present invention is configured as described above, a two-color molded product can be efficiently molded with a large number of cavities, and after the mold is opened, a small-diameter communication pin is provided between the fixed mold and the intermediate mold. Is only exposed, so this communication pin does not hinder the removal of the product.Take out the released two-color molded product from the mold smoothly and perform the two-color molding smoothly and reliably. As a result, there is an effect that productivity can be significantly improved.

[Brief description of the drawings]

1 and 2 show an embodiment of the present invention.
FIG. 2 is a sectional view, and FIG. 2 is a perspective view showing an example of a cassette half. PL …… product mating surface (parting line), 10 ……
Fixed type, 20 ... Intermediate type, 30 ... Movable type, 60,60 '... Cavity, 70,70' ... Movable type.

Claims (1)

(57) [Claims] 1. A manifold having a primary resin material passage and a secondary resin material passage formed between a movable mold and a fixed mold having a primary resin material sprue bush and a secondary resin material sprue bush. And the primary resin material and the secondary resin material from the passage for the primary resin material and the passage for the secondary resin material of the manifold, the primary resin material and the secondary resin material are interposed between the intermediate mold and the fixed mold. The cavities formed in the plurality of product mating surfaces between the intermediate mold and the movable mold are respectively supplied to the primary resin material filling space and the secondary resin material filling space of the cavities, and these product mating surfaces are opened. A multi-molding mold apparatus configured to take out a product, wherein the fixed mold and the movable mold are movable in the mold opening and closing direction,
A movable mold body that closes the secondary resin material filling space when advanced toward the cavity is provided corresponding to each cavity, and the fixed mold extends in a mold opening and closing direction, and one end of each extends in the middle. One end of each of the first and second fixed-side pin fitting holes opened on the mold side, and the sprue bush for the primary and secondary resin materials, respectively, and the other end thereof is the first and second fixed portions. First and second fixed-side resin passages are formed in the middle of the side-pin insertion hole and communicate with each other from the side. The first and second fixed-side resin passages extend in the opening and closing direction of the intermediate mold, and one end of each of the fixed-side pin insertions. First and second intermediate pin insertion holes are formed, each communicating with one end of the hole, and each other end communicating with the primary resin material passage and the secondary resin material passage of the manifold, respectively. First and second communication pins having communication passages formed along the axial direction at portions other than the end portions are provided so that each tip portion is inserted into the first and second fixed-side pin insertion holes in the mold opening and closing direction. First and second passage opening / closing mechanisms respectively inserted into the first and second intermediate pin insertion holes while being movably fitted therein, and further allowing the respective communication pins to individually advance and retreat in the axial direction. The first passage opening / closing mechanism is provided with the first passage opening / closing mechanism during the primary molding in which each movable mold body moves forward to close the secondary material filling space of each cavity.
The communication pin is moved forward to open the other end of the first fixed-side resin passage, while the second passage opening / closing mechanism retracts the second communication pin so that the end of the second fixed-side resin passage is closed at the tip. At the time of secondary molding, the other end is closed, and the first passage opening / closing mechanism retracts the first communication pin to close the other end of the first fixed-side resin passage, while the second passage opening / closing mechanism closes the second passage opening / closing mechanism. A multiple molding die apparatus, wherein the second communication pin is advanced to open the other end of the second fixed-side resin passage.