JPH08183073A - Mold equipment - Google Patents

Abstract

(57) [Summary] [Object] The present invention forms a molded product on a mating surface of a pair of sliding members that expand in a direction perpendicular to the expanding direction in conjunction with the expanding operation of a mold device. In a split mold apparatus in which a cavity is formed, and a core pin is inserted into and taken out of the cavity, a pair of sliding members delays the core pin from returning to the inside of the cavity. The purpose is to prevent damage to the mold equipment. [Structure] A cavity in which a molded product is molded is formed on a mating surface of a sliding member that expands in a direction orthogonal to the expanding direction in conjunction with the expanding operation of a mold device, and a core pin is formed in the cavity. In a mold device adapted to move in and out, a means for temporarily locking the sliding member when the sliding member is expanded,
A mold device, comprising means for interlocking with the movement of the core pin when the mold is closed, and for releasing the locking when the movement is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold device having a pair of sliding members which move in a direction perpendicular to the opening / closing direction of the mold.

[0002]

2. Description of the Related Art An example will be described with reference to FIGS. It is a split mold device that molds a molded product with a clip inside the side surface of the cap. A pair of sliding members 1 that move in a perpendicular direction in conjunction with the opening and closing operation of the mold
On the mating surfaces of 01 and 102, there are formed cavities 103 and 104 in which the molded product is molded, and core grooves 106 and 107 into which core pins 105 for molding a hollow portion in the molded product are fitted. A diameter-reduced portion 105a is formed in the middle portion of the core pin 105 so that the clip is a molded product (see FIG. 15) that is inserted inside the side surface of the cap. Angular pins 109 and 110 fixed to a fixed plate 114 attached to a molding machine (not shown) are fitted into the sliding members 101 and 102. With the angular pins 109 and 110, the sliding member 101,
The opening and closing of 102 is performed.

Below the sliding members 101 and 102 (in the figure), when the mold device is expanded after the completion of molding, the core pin 1
Stripper plate 1 for pulling out the molded product fixed to 05 from the core pin 105 by bringing the end of the molded product into contact with the molded product.
11 are arranged. Reference numeral 112 is a bush with which the core pin 105 slides, and 113 is an ejector plate that operates the core pin 105. By operating the core pin 105, the end of the molded product is brought into contact with the stripper plate 111 and the molded product is the core pin. Extract from 105.

Next, the operation will be described. 14 and 1
As shown in 5, the cavity 1 with the mold device closed.
Molding is carried out by injecting resin into 03 and 104. After completion of molding, the mold device is expanded. By this expanding operation, the sliding member 10 interlocked with the angular pins 109 and 110.
1, 102 expand in a direction perpendicular to the expanding direction of the mold device. Further, when the mold device is expanded, the ejector plate 113 retracts the core pin 105, the end of the molded product contacts the stripper plate 111, and the molded product finally comes out of the core pin 105 (see FIG. 16). This completes one cycle. Then, the mold apparatus is closed again to perform molding (return to the state of FIG. 14).

[0005]

In a general mold device, the moving speed of the stripper plate 111, the moving speed of the sliding members 101, 102, etc. are determined by the sliding resistance between the bush 112 and the core pin 105 and the angular contact. Pins 109,1
10 is determined by the sliding resistance between the sliding members 101 and 102. In the mold device as described above, the sliding members 101 and 102 are closed after the core pin 105 (ejector plate 113) is returned.
When the sliding members 101 and 102 are closed first, the top portion 105b of the core pin 105 is reduced in diameter.
This is because it will collide with 108 or be caught by the closing force of the sliding member consisting of several tons (see FIG. 17). In such a state, not only the core pin 105 but also the sliding members 101 and 102 were damaged, and it was necessary to remake them. However, if the mold device is relatively new, the above-mentioned problem does not occur (it is unlikely to occur), but the mold device becomes old, or
If a foreign substance enters between the bush 112 and the core pin 105, a foreign substance enters between the ejector plate 113 and the stripper plate 111, or each member expands or contracts due to temperature control of the mold, The setting of each sliding resistance collapses, causing a problem.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to align sliding members that expand in a direction perpendicular to the expanding direction in conjunction with the expanding operation of a mold device. In a mold device in which a cavity for forming a molded product is formed on the surface, and a core pin is inserted into and removed from the cavity, the sliding member is temporarily engaged when the sliding member is expanded. It is characterized in that it is provided with a means for stopping and a means for interlocking with the movement of the core pin at the time of mold closing and releasing the locking at the time when the movement is completed.

[0007]

With the temporary locking means of the sliding member, the sliding member is closed after the core pin is restored.

[0008]

(Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. Similar to the above-mentioned prior art, it is a split-type mold device that molds a molded product in which the clip is inserted inside the side surface of the cap. The mating surfaces of the pair of sliding members 1 and 2 which move in the right-angled direction in conjunction with the opening / closing operation of the mold have cavities 3 and 4 in which the above-mentioned molded product is molded, and a core pin for molding a hollow portion in the molded product Core grooves 6, 7 into which 5 is inserted
Are formed. A molded product in which a clip is inserted inside the side surface of the cap in the middle portion of the core pin 5 (see FIG. 1).
5), the reduced diameter portion 5a is formed. An angular pin (not shown, see FIG. 14) fixed to a stationary platen 8 attached to a molding machine (not shown) is fitted into the sliding members 1, 2. The sliding members 1 and 2 are opened and closed by this angular pin. A lock pin 9, which is a locking means for temporarily locking the movement of the sliding member 1, is attached to the sliding member 1 so as to be vertically movable (in the figure). In the illustrated example, the lock pin 9 is biased downward by an elastic member 10 such as a coil spring. However, in a vertical molding machine, the elastic member 10 is not used and the lock pin 9 is moved downward by its own weight. You may urge to. Reference numeral 11 is a cap member such as a screw that supports one end of the elastic member 10.

At the lower part of the sliding members 1 and 2 (in the figure), after the molding is completed, when the mold device is expanded, the molded product fixed to the core pin 5 is brought into contact with the end of the molded product. Let core pin 5
A stripper plate 12 to be extracted further is arranged. Reference numeral 13 is a bush on which the core pin 5 slides, and 14 is an ejector plate for actuating the core pin 5. The ejector plate 14 pushes up the lock pin 9 to release the sliding members 1, 2. The return pin 15 is also fixed. The return pin 15 has an engagement hole 12a formed in the stripper plate 12.
The lock pin 9 is pushed up via.

Next, the operation will be described. FIG. 1 shows the mold apparatus at the most expanded position after the completion of molding. Of course, the molded product comes out of the core pin 5. Also, the sliding member 1
The lock pin 8 attached to is fitted in the engaging hole 11a. Here, when the mold device is closed, the sliding member 1 is locked by the lock pin 9 and cannot move,
The ejector plate 14, the core pin 5, and the return pin 15 move (see FIG. 2). When the movement is completed, the return pin 15 pushes up the lock pin 9. By this operation, the movement restriction of the sliding members 1, 2 is released and the sliding members 1,
2 is also closed (see Figure 3). In this state, the resin is poured into the cavities 3 and 4 for molding. After the molding is completed, when the mold device is expanded, as shown in FIG.
Fits into the engagement hole 12a.

FIG. 4 shows a modification of the lock pin 8 according to a second embodiment of the present invention, in which a lock claw 16 is rotatably arranged on a sliding member 1 about a shaft 17 as a fulcrum.
The engagement groove 12b with which the lock claw 16 is engaged is formed in the stripper plate 11. The lock pin 15 is released by the return pin 15 as in the previous example.

5 to 7 show a third embodiment of the present invention. The structure different from that of the first embodiment is the mounting position of the return pin. In the second embodiment, the return pin 18 is fitted into the engagement elongated hole 12c of the stripper plate 12 and the lower portion 18a of the return pin 18 is arranged to project, while the return pin 18 has a collar portion 18b at the top thereof. Is formed. Next, the operation will be described. When the mold apparatus is expanded, the lock pin 9 is engaged with the engaging elongated hole 12
c is engaged. When the mold device is closed, the ejector plate 14 and the core pin 5 move first, and when the movement to the core pin 5 is completed, the ejector plate 14 moves.
The upper surface pushes up the return pin 18 and the lock pin 9 (see FIG. 6). This lock pin 9
The movement of the sliding members 1 and 2 is released by the push-up operation of (1) to close the sliding members (see FIG. 7). In addition, the collar portion 18b
Further, the shape of the engagement elongated hole 12c may be rectangular as shown in FIGS. 8 and 9, or may be circular, and the shape can be appropriately selected.

10 to 13 show a fourth embodiment of the present invention. It is a mold device for molding a molded product as shown in FIG. A hole or the like is formed in the middle part of the molded product. As shown in FIG. 11, in the mold device, a rod-shaped member 21 for forming a hole in the middle portion of the molded product is fixed to one side surface of the sliding member 19 (20). The stick 2
1 slides in a hole 22a formed in the stripper plate 22. Further, the core pin 23 is formed with a fitting hole 23a into which the rod 21 is fitted.

Next, the operation will be described. When the mold device is expanded, the sliding members 19 and 20 are also expanded, and the rod-like object 21 is located away from the core pin 23. The lock pin 9 is engaged with the engagement hole 22b (see FIG. 11). When the mold device is closed, the ejector plate 14, the core pin 23 and the return pin 15 are first
Moves, and when the movement of the core pin 23 is completed, the return pin 15 pushes up the lock pin 9 against the elastic force of the elastic member 10 (see FIG. 12). This lock pin 9
The movement restriction of the sliding members 19 and 20 is released by the pushing up operation of the rods, the sliding members 19 and 20 are also closed, and the rod-shaped object 21
Also fits into the fitting hole 23a (see FIG. 13).

[0016]

According to the present invention, a cavity for molding a molded product is formed on a mating surface of a sliding member that expands in a direction perpendicular to the expanding direction in conjunction with the expanding operation of a mold device. In a mold device in which a core pin is moved in and out of this cavity, means for temporarily locking the sliding member when the sliding member is opened and interlocking with the movement of the core pin when the mold is closed However, since the means for releasing the locking at the time of completion of the movement is provided, the movement of the sliding member is delayed compared with the return of the core pin, and the mold device is not damaged.

[Brief description of drawings]

FIG. 1 is a front sectional view of a first embodiment of the present invention when the mold is opened.

FIG. 2 is a front cross-sectional view immediately before mold clamping in FIG.

FIG. 3 is a front cross-sectional view when the mold clamping in FIG. 2 is completed.

FIG. 4 is a front sectional view of a locking portion according to a second embodiment of the present invention.

FIG. 5 is a front sectional view of the third embodiment of the present invention when the mold is opened.

FIG. 6 is a front cross-sectional view immediately before the mold clamping in FIG.

FIG. 7 is a front cross-sectional view when the mold clamping in FIG. 5 is completed.

FIG. 8 is a plan view of a collar portion.

FIG. 9 is a plan view of another example of the collar portion.

FIG. 10 is an external perspective view of a molded product molded according to the fourth embodiment of the present invention.

FIG. 11 is a front cross-sectional view of a fourth embodiment of the present invention when the die is opened.

FIG. 12 is a front cross-sectional view immediately before the mold clamping in FIG. 11.

FIG. 13 is a front cross-sectional view when the mold clamping in FIG. 12 is completed.

FIG. 14 is a front cross-sectional view of a conventional split mold apparatus when the mold is closed.

FIG. 15 is a sectional view taken along line AA of FIG.

16 is a front sectional view of the mold shown in FIG. 15 when opened.

17 is a front cross-sectional view showing a state where the split mold of FIG. 16 is tightened first and the core pin cannot be inserted.

[Explanation of reference numerals] 1, sliding member 3, 4 cavity 6, 7 core groove 8 fixing plate 9 lock pin 10 coil spring 11 cap member 11a, 12a engaging hole 12,22 stripper plate 14 ejector plate 15 return pin 19, 20 Sliding member 23 Core pin

Claims (1)

[Claims] 1. A cavity in which a molded product is formed is formed in a mating surface of a sliding member which expands in a direction perpendicular to the expanding direction in association with the expanding operation of a mold device. In the mold device in which the core pin is moved in and out, the means for temporarily locking the sliding member when the sliding member is expanded and the movement of the core pin when the mold is closed are completed. A mold apparatus comprising means for releasing the locking at the time of performing.