JP2745259B2 - Molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method in which a plurality of molded products can be taken out by a set of dies in an assembled state.

[0002]

2. Description of the Related Art In the case of molding and assembling a plurality of molded articles, conventionally, each molded article is molded by a separate mold and then assembled by a robot or the like. That is, FIG. 14 and FIG.
A cover 3 having a hole 3a as shown in FIG.
And a plunger 4 provided with a locking projection 4a for preventing slippage is formed by a separate mold, and the ejecting pins 5, 5 'are ejected and taken out. Further, as shown in FIG. Was assembled by the person.

[0003]

However, according to the conventional molding method, there are two steps, a molding step and an assembling step, and the operation is complicated, and there is a possibility that an assembly error may occur. The present invention has been made to solve such a problem, and an object of the present invention is to provide a molding method capable of taking out a plurality of molded products in a set of molds in an assembled state.

[0004]

In order to achieve the above object, the present invention comprises a first molded product having a hole, and a locking projection fitted into the hole to prevent the product from falling off. Wherein the second molded product can be removed in an assembled state by using a set of molds including a fixed mold portion, a movable mold portion, a gate shut pin, and a falling pin. The molding cavity of the first molded product is disposed at a position corresponding to the hole of the molding cavity of the first molded product, a gate shut pin is provided so that each cavity can be communicated and separated, and the gate provided in the molding cavity of the first molded product is provided. Filling the resin into the molding cavity of the second molded product by moving the gate shut pin, and forming the first and second molded products by the gate shut pin after the filling is completed. cavity Separating step, tilting the falling pin when opening the mold, removing the falling pin from the locking projection of the second molded article, and assembling the first and second molded articles by projecting the ejection pin And a removing step. The present invention also provides a first molded product having a hole, and a second molded product fitted with the hole and provided with a locking projection for preventing the upper and lower portions from falling off, the fixed mold portion. And a movable mold part and a side core, and a mold including a gate shut pin and a falling pin, wherein the molding cavity of the second molded product is formed by molding the first molded product. A gate shut pin is provided at a position corresponding to the hole of the cavity for communication, and a gate shut pin is provided so as to be able to communicate and separate each cavity. Moving and filling the molding cavity of the second molded product with the resin, separating the molding cavity of the first and second molded products by the gate shut pin after the filling is completed, and opening the mold. Open the Idokoa,
A step of pulling out the side core from the upper locking projection of the second molded product, opening the fixed mold portion and the movable molding portion, tilting the falling pin, and It is characterized by comprising a step of pulling out the falling pin and a step of taking out the first and second molded products in an assembled state by protruding the protruding pin.

[0005]

According to the present invention, in the present invention, the first molded product having the hole and the second molded product provided with the locking projection for preventing the detachment can be removed from the mold in an assembled state. For this purpose, the molding cavity of the second molded product is arranged at a position corresponding to the hole of the molding cavity of the first molded product, and by operating a gate shut pin capable of communicating and separating each cavity, The resin is filled into the molding cavity of the first molded product and the molding cavity of the second molded product, and at the time of opening the mold, first, the falling pin is tilted to remove the mold from the locking projection of the second molded product. The first and second molded products are taken out in an assembled state by pulling out and then protruding the protruding pins. Further, the present invention provides a molding cavity for the second molded product at a position corresponding to a hole of the molding cavity for the first molded product, and operates a gate shut pin capable of communicating and separating each cavity. Resin is filled into the molding cavity of one molded product and the molding cavity of the second molded product. When opening the mold, first open the side core and then tilt the falling pin to lock the second molded product. The first and second molded products are taken out in an assembled state by removing the mold from the part and then projecting the ejection pin.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The same or corresponding members are denoted by the same reference numerals and described.

(Embodiment 1) FIGS. 1 (a) to 1 (c) show the configuration of a mold used in the method of the present embodiment. This mold includes a fixed mold section 10, a movable mold section 20, and a movable gate. It has a shut pin 35 and a falling pin 25. In addition, FIG.
2 shows a state in which the cover 3 having the above structure and the plunger 4 fitted in the hole 3a and provided with the locking projection 4a for preventing falling off are assembled.

In FIG. 1B, the plunger cavity 40 is positioned at a position corresponding to the hole of the cover cavity 30 (3).
a), a gate 1 is provided in the cover cavity 30. Further, as shown in FIG. 1A, the gate shut pins 3 are provided so that the cavities 30 and 40 can be communicated and separated.
5 are provided. Further, a protruding pin 5 is provided at a lower portion of the plunger 4, and a locking protruding portion 4 for preventing falling off is provided.
A falling pin 25 is provided at a position corresponding to a. In addition, as shown in FIG.
Is provided with a gap around.

Next, the steps of this embodiment will be described. First,
As shown in FIG. 1B, a resin is filled from the gate 1 into the cover cavity 30. At this time, FIGS.
Since the gate shut pin 35 is lowered, the cavities 30 and 40 are communicated with each other, so that the plunger cavity 40 is also filled with resin.

Next, as shown in FIGS. 4A and 4B, the gate shut pin 35 is pushed up and the cover cavity 30 is pushed.
And the plunger cavity 40 are separated. Thus,
The filling is completed as shown in FIG. After the molding is completed, as shown in FIG. 6, the falling pin 25 is tilted so as to open left and right, pulled out of the locking projection 4 a for preventing retaining, the push-out pin 5 is pushed up, and the
Take out.

(Embodiment 2) FIGS. 7 (a) to 7 (d) show the configuration of a mold used in the method of the present embodiment. This mold comprises a fixed mold section 10, a movable mold section 20, a side core 15, and It has a movable gate shut pin 35 and a fall pin 25.
FIG. 8 shows a cover 3 having a hole 3a,
locking projections 4a, 4 which are fitted in
5 shows a state in which the plunger 4 provided with b is assembled.

In FIG. 7B, the plunger cavity 40 is positioned at a position corresponding to the hole of the cover cavity 30 (3).
a), a gate 1 is provided in the cover cavity 30. Also, as shown in FIG. 7A, the gate shut pins 3 are provided so that the cavities 30 and 40 can be communicated and separated.
5 are provided. Further, a protruding pin 5 is provided at a lower portion of the plunger 4, and a locking protruding portion 4 for preventing falling off is provided.
A falling pin 25 is provided at a position corresponding to a. In addition, as shown in FIG.
A gap is provided around the, and as shown in FIG.
The side core 15 is provided with a locking projection cavity (4b).

Next, the steps of this embodiment will be described. First,
As shown in FIG. 7B, a resin is filled from the gate 1 into the cover cavity 30. At this time, FIGS. 9 (a) to 9 (c)
As described above, since the gate shut pin 35 is lowered, the cavities 30 and 40 are communicated with each other, so that the resin is also filled in the plunger cavity 40. Next, as shown in FIGS. 10A and 10B, the gate shut pin 35 is pushed up to separate the cover cavity 30 and the plunger cavity 40. After the molding is completed, the side core 15 is opened as shown in FIG. 11 and the undercut portion for the locking projection (4b) on the upper part of the plunger 4 is pulled out.

Next, as shown in FIG. 12, the protruding of the protruding pin 5 is started, and as shown in FIGS.
First, the falling pin 25 is tilted left and right to remove the undercut portion for the lower locking projection (4b). Subsequently, the cover 3 is pushed up by the protruding pin 5 and the cover 3 and the plunger 4 are simultaneously assembled.

[0015]

As described above, according to the present invention, the molding cavities of the second molded article are arranged at positions corresponding to the holes of the molding cavities of the first molded article, and the respective cavities can be communicated and separated. Providing a gate shut pin, filling the resin from the gate provided in the molding cavity of the first molded product, and moving the gate shut pin to fill the resin into the molding cavity of the second molded product; Separating the molding cavities of the first and second molded products by the gate shut pin after filling is completed, and tilting the falling pins when the mold is opened, and pulling out the falling pins from the locking projections of the second molded product. And a step of ejecting the first and second molded articles in an assembled state by ejecting the ejecting pins, and further, the molding cavity of the second molded article is formed by the molding key of the first molded article. A gate shut pin is provided at a position corresponding to the hole of the bitty so that each cavity can be communicated and separated, and the resin is filled from the gate provided in the molding cavity of the first molded product, and the gate shut pin is moved. And filling the resin into the molding cavity of the second molded product, and separating the molding cavity of the first and second molded products by the gate shut pin after completion of the filling,
Opening the side core when opening the mold, removing the side core from the locking projection at the top of the second molded product, opening the fixed mold portion and the movable mold portion and tilting the falling pin to form the second molded product A step of pulling out the falling pin from the lower locking projection and a step of ejecting the first and second molded products in an assembled state by projecting the ejection pin, thereby forming a plurality of molds in one set of molds. The product can be taken out in an assembled state, so that the assembling process can be simplified.

[Brief description of the drawings]

1A is a plan view showing a configuration of a mold according to a first embodiment, FIG. 1B is a cross-sectional view taken along line AA, and FIG. 1C is an enlarged view of a portion C.

FIG. 2 is a diagram showing an assembled state of a molded product.

FIG. 3A is a view showing a flow of resin when a cover cavity and a plunger cavity are communicated with each other, and FIG.
Is a cross-sectional view taken along the line BB, and FIG.

FIG. 4A is a diagram showing a state in which a cover cavity and a plunger cavity are separated, and FIG. 4B is an enlarged view of a portion E thereof.

FIG. 5 is a view showing a state in which a resin is completely filled in a mold.

FIG. 6 is a diagram showing a state when a molded product is taken out.

7A is a plan view showing a configuration of a mold according to a second embodiment, FIG. 7B is a cross-sectional front view thereof, FIG.
(D) is an AA sectional view.

FIG. 8 is a view showing an assembled state of a molded product.

FIG. 9A is a view showing a flow of resin when the cover cavity and the plunger cavity are communicated with each other, and FIG.
Is a sectional view taken along the line BB, and (c) is an enlarged view of a portion D.

10A is a view showing a state in which a cover cavity and a plunger cavity are separated, and FIG. 10B is an enlarged view of a portion E of FIG.

FIG. 11 is a diagram showing a state where a side core is opened.

FIG. 12 is a diagram showing a state before the ejection of the molded product by the ejection pin is started.

FIG. 13A is a cross-sectional front view when removing a molded product,
(B) is the sectional side view.

FIG. 14 is a diagram showing a method of forming a cover according to a conventional example.

FIG. 15 is a view showing a conventional method of forming a plunger.

FIG. 16 is a view showing a method of assembling a molded product according to a conventional example.

[Explanation of symbols]

 1, 2 Gate 3 Cover 3a Hole 4 Plunger 4a, 4b Locking protrusion 5 Protruding pin 10 Fixed side mold 15 Side core 20 Movable mold 25 Falling pin 30, 40 Cavity 35 Gate shut pin

Claims (2)

(57) [Claims] 1. A first molded product having a hole and a second molded product fitted into the hole and provided with a locking projection for preventing slippage are formed on a fixed mold portion and a movable mold. In a molding method capable of being taken out in an assembled state by a pair of molds including a mold portion, a gate shut pin, and a falling pin, the molding cavity of the second molded product is replaced with a hole of the molding cavity of the first molded product. A gate shut pin is provided so as to be able to communicate and separate the respective cavities, a resin is filled from a gate provided in a molding cavity of the first molded product, and the gate shut pin is moved by moving the gate shut pin. A step of filling the molding cavity of the second molded article with the resin, a step of separating the molding cavities of the first and second molded articles by the gate shut pin after the filling is completed, and tilting the falling pin when the mold is opened, No. Molding method of a the step of removing the fallen pins from the molded article of the locking projection, characterized by comprising a first by projecting the ejector pin and the step of removing the second molded product in the assembled state. 2. A fixed mold part comprising: a first molded product having a hole; and a second molded product fitted with the hole and having a locking projection for preventing the upper and lower portions from falling out. In a molding method capable of being taken out in an assembled state by a pair of molds including a movable side mold part, a side core, and a gate shut pin and a falling pin, the molding cavity for the second molded product is used for molding the first molded product. Arranged at positions corresponding to the holes of the cavities, gate shut pins are provided so that the cavities can be communicated and separated, resin is filled from the gate provided in the molding cavity of the first molded product, and the gate shut pins are moved. And filling the molding cavity of the second molded product with the resin, separating the molding cavity of the first and second molded products by the gate shut pin after the filling is completed, Opening the side core from the locking projection on the upper part of the second molded article, and opening the fixed mold part and the movable mold part and tilting the falling pin to engage the lower part of the second molded article. A molding method, comprising: a step of pulling out a falling pin from a stop projection; and a step of taking out a first and a second molded product in an assembled state by projecting a projection pin.