JPH04292920A - Mold for molding of insert - Google Patents

Abstract

PURPOSE:To make setting work of an insert member easy and reduce setting errors. CONSTITUTION:A slide core 6 is provided on one side mold 5 side so that a forward and backward movements can be performed along the direction different from a breaking or clamping direction of the mold, a core side cavity forming surface 6a is formed in front of the slide core 6 and an insert member holding part 17 is formed on the core side cavity forming surface 6a. In a mold for molding an insert where the one side mold 5 possesses a mold side cavity 5a and the mold side cavity forming surface 5a possesses a confronting surface part 5b which is confronted with the core side cavity forming surface 6a, the one side mold 5 side is provided with a mounting plate 15, the slide core 6 whose forward and backward movements are allowed is fitted integrally to the mounting plate 15 and the mounting plate 15 is turned by a fixed angle in the direction facing on a position where the core side cavity forming surface 6a is confronted with the other side mold 4 when the slide core 6 is on a position moving backward.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to an insert molding die for molding a molded product equipped with an insert member.
Specifically, the present invention relates to an insert molding die in which the insert member is on a surface in a direction different from the mold opening/closing direction during molding.

0002

2. Description of the Related Art Conventionally, when molding a molded product 3 having insert members 1 and 2 as shown in FIG. An insert molding die equipped with a slide core 6 as conceptually shown in FIGS. 8 and 9 was used.

This insert molding mold includes a slide core 6 and a pair of molds 4 and 5 of an open/close type, and the slide core 6 can advance and retreat in a direction different from the mold opening/closing direction. A core side cavity forming surface 6a is formed on the front surface of the slide core 5, and an insert member holding part 17 on which the insert member 2 is set is formed on the core side cavity forming surface 6a. It is formed. One of the molds 5 has a mold-side cavity forming surface 5a, and the mold-side cavity forming surface 5a has an opposing surface portion 5b facing the core-side cavity forming surface 6a.

0004

However, in the above conventional insert molding mold, when the mold is opened and the slide core 6 is in the retracted position (the state shown in FIG. 9), the core side cavity forming surface 6a and the metal Since the distance between the mold side cavity forming surface 5a and the opposing surface portion 5b is usually narrow, it is difficult to set the insert member 2 in the insert member holding portion 17 of the slide core 6, and setting errors are likely to occur. There was a problem.

[0005] The present invention solves the above-mentioned problems, and an object of the present invention is to provide an insert molding die which can facilitate the setting work of insert members and can reduce setting errors.

[0006]

[Means for solving the problem] In order to solve the above problem,
The insert molding mold according to the present invention includes a slide core and a pair of opening/closing type molds, and the slide core is configured to move forward and backward along a direction different from the mold opening/closing direction. Provided on one side of the mold,
A core-side cavity forming surface is formed on the front surface of the slide core, an insert member holding portion into which an insert member is set is formed on the core-side cavity forming surface, and the one mold is formed on the mold side. having a cavity forming surface;
The mold-side cavity forming surface has an opposing surface portion facing the core-side cavity forming surface, and in the insert molding mold, a mounting plate is provided on the one mold side, and the mounting plate includes a mounting plate. , the slide core is integrally attached with the slide core allowed to move forward and backward, and the mounting plate is configured such that when the slide core is in the retreat position, the core-side cavity forming surface of the slide core is aligned with the pair of The mold is characterized by being rotated by a predetermined angle in a direction toward a position facing the other mold.

[0007]

[Operations and Effects of the Invention] According to the insert molding mold according to the present invention, when the core side cavity forming surface of the slide core is located on a surface coaxial with the opening/closing direction of the mold, the position facing the other mold is Since the insert member can be set in the insert member holding portion when the insert member is in the insert member holder, the setting work becomes easier and setting errors are reduced. In addition, since the operator position is located at the rear of the slide core, and conventionally, the insert member holding part is provided on the core-side cavity forming surface of the slide core, when setting the insert member in the insert member holding part, Although the distance between the fixed mold and the movable mold in the mold opening/closing direction must be set relatively long, according to the present invention, the distance between the fixed mold and the movable mold in the mold opening/closing direction must be set relatively short. Because the insert member can be easily set in the insert member holder,
It is possible to downsize the insert molding die. Further, according to the present invention, even if the distance between the core-side cavity forming surface and the opposing surface portion of the mold-side cavity forming surface of one mold is set narrow when the slide core is in the retracted position, the insert member setting work can be performed easily. Since no problem occurs, the stroke of the slide core can be shortened, and the insert mold can be made smaller.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

■First embodiment (FIGS. 1 to 6) The insert molding mold according to this embodiment is a mold for molding a molded product 3 equipped with insert members 1 and 2 as shown in FIG. be. As shown in FIGS. 1 to 5, this mold consists of a female mold (corresponding to the other mold referred to in the present invention) 4 and a male mold (also corresponding to one mold) 5. Consisting of a pair of molds, a slide core 6, etc., the cavity forming surface 4 of the female mold 4
a, the mold side cavity forming surface 5a of the male mold 5, and the core side cavity forming surface 6a of the slide core 6 form a cavity.

The female mold 4 is a fixed type. The female mold 4 is provided with an angular pin 7 projecting toward the male mold 5. As will be described later, this angular pin 7 moves in and out of the inclined hole 8 of the slide core 6 as the male mold 5 rises and falls, moves the slide core 6 in the left-right direction in the drawing on the mounting plate 15, and moves the slide core 6 forward. , to retreat. Further, the female die 4 is provided with a rod 9 projecting downward.

The male mold 5 is a movable mold. An insert set pin 10 (hereinafter referred to as a first insert member) is set on the mold side cavity forming surface 5a of the male mold 5, and a hollow cylindrical insert member 1 (hereinafter referred to as a first insert member) whose axial direction coincides with the mold opening/closing direction is set. , referred to as the first insert set pin) are formed. The mold-side cavity forming surface 5a has an opposing surface portion 5b that faces the core-side cavity forming surface 6a of the slide core 6. The male mold 5 has a through hole 11 in the vertical direction.
A push-out pin 12 that moves up and down is inserted into the through-hole 11. The male die 5 is provided with a cylinder 14 into which the rod 9 and the cylindrical body 13 move in and out.

A mounting plate 15 is pin-coupled to the male mold 5, and the mounting plate 15 has a core-side cavity forming surface 6a facing the female mold 4 when the slide core 6 is in the retracted position. direction (counterclockwise in the drawing), pin 3
It is configured to rotate 1/4 around 0 as an axis. When mold closing is started, the mounting plate 15 moves 1/4 in the direction (clockwise in the drawing) toward a position where the core-side cavity forming surface 6a faces the opposing surface portion 5b of the mold-side cavity forming surface 5a. It is configured to rotate. A guide 16 is provided on the mounting plate 15, and the guide 16 guides the slide core 6 forward and backward.

A core-side cavity forming surface 6a is formed on the front surface of the slide core 6. Another insert set pin (hereinafter referred to as a second insert set pin) in which another insert member (hereinafter referred to as a second insert member) 2 whose axial direction does not coincide with the mold opening/closing direction is set on the core side cavity forming surface 6a. ) 17 corresponding to the insert member holding portion referred to in the present invention is formed. The slide core 6 is provided with an inclined hole 8 through which the angular pin 7 enters and exits, and moves the slide core 6 forward and backward as described above.

Below the male die 5 are an upper plate 18 and a first middle plate 1.
9. A second middle plate 20 and a lower plate 21 are arranged in this order.

One end of a link 22 is connected to the mounting plate 15 with a pin, and the other end of the link 22 is connected to the upper plate 18 with a pin. A cylindrical body 13 is attached to the upper plate 18 so as to protrude upward. The cylindrical body 13 has a diameter that can be reduced, and allows the rod 9 to move in and out when it is in a large diameter state (normal state) where its tip is located at the large diameter portion 14a at the lower end of the cylinder 14. 14, the tip receives a pressing force from the tip of the rod 9, the upper plate 18 descends, and the slide core 6 moves clockwise from the state shown in FIG. 3 via the link 22 and the mounting plate 15. It is configured so that it can rotate 1/4 turn to the state shown in FIG. others,
The upper plate 18 has a through hole 23 through which the extrusion pin 12 passes,
and a through hole 25 through which the return spring 24 passes.
is provided.

A push-up rod 26 as a driving source passes through the lower plate 21 to push up the second middle plate 20 by rotating the slide core 6 counterclockwise by 1/4 turn to the state shown in FIG. , a through hole 27 is provided.

Between the upper surface of the first intermediate plate 19 and the lower surface of the male mold 5, when the push-up rod 26 returns to the lower position, the first and second
A return spring 24 is provided that pushes down the middle plates 19, 20. The first intermediate plate 19 is attached to the second intermediate plate by tightening bolts.
An extrusion pin 12 is integrated with the intermediate plate 20 and is provided on the first and second intermediate plates 19 and 20 for releasing the molded product 3 on the male die 5.
is provided to protrude upward.

The other reference numeral 28 in the figure represents a compression spring for buffering, and 29 represents a molten resin material.

Next, the steps for manufacturing the molded product 3 shown in FIG. 6 using the insert molding die configured as described above will be explained in order. In order to facilitate understanding, the explanation will be given in order starting from the time of molding.

■ During molding (see FIG. 1) During this molding, the cavity forming surface 4a of the female mold 4
A cavity is formed by the mold side cavity forming surface 5a of the male mold 5 and the core side cavity forming surface 6a of the slide core 6, and molten resin material 29 is injected into this cavity from a gate (not shown).

At the time of this molding, the cylindrical body 13 is located at the large diameter portion 14a of the cylinder 14, and the rod 9 is in a state that it has entered into the cylindrical body 13. The mounting plate 15 is in a horizontal state, and the upper end surface of the extrusion pin 12 is flush with the cavity surface of the male mold 5, forming a part of the mold side cavity forming surface 5a.

(2) When opening the mold (see FIGS. 1 and 2) When the molten resin material 29 injected into the cavity is hardened, the male mold 5 is lowered and the mold is opened. Note that this mold opening is performed by a known mold drive mechanism (not shown).

During this mold opening, as the male mold 5 descends, the rod 9 relatively rises and the cylindrical body 1
3 (state shown in Figure 2).

[0024] The slide core 6 also has an angular pin 7.
It is moved leftward on the mounting plate 15 and located at the retreated position (the state shown in FIG. 2).

■When releasing the mold (see FIGS. 2 and 3) After further lowering the male mold 5 from the state shown in FIG.
Push up the middle plate 20. Then, the first and second middle plates 19,
20, the upper plate 18 rises as one, and the cylindrical body 13 is reduced in diameter and penetrates deeply into the small diameter portion 14b of the cylinder 14. At the same time, the extrusion pin 12 protrudes upward from the cavity surface of the male mold 5 to release the molded product 3, and the mounting plate 15 is moved counterclockwise around the pin 30 via the link 22.
/4 rotation and becomes vertical (the state shown in Fig. 3).

■ When setting the insert member (see FIGS. 3 and 4) When the push-up bar 26 is lowered from the state shown in FIG. 3, the first and second intermediate plates 20 are lowered by the return spring 24,
The extrusion pin 12 is lowered and its upper end surface becomes flush with the mold side cavity surface 5a of the male mold 5. Note that the upper plate 18 remains in the state shown in FIG. 3, the slide core 6 remains in the vertical state, and the cylindrical body 13 remains in the cylinder 14 (the state shown in FIG. 4). .

Therefore, the setting of the first insert member 1 to the first insert set pin 10 is performed in the same manner as the conventional setting described above, but the setting of the second insert member 2 to the second insert set pin 17 is performed in the same way as the first insert set. As with the setting of the pins 10, this can be done from above where the widely spaced daylight spaces are formed. Therefore, setting of the second insert setting member 2 becomes easy, and setting errors are reduced.

(2) When closing the mold (see FIGS. 4, 5, and 1) After setting the first and second insert members 1 and 2 from the state shown in FIG. 4, the male mold 5 is raised. Then, the rod 9 descends relatively and comes into contact with the tip of the cylindrical body 13. When the rod 9 further descends from this state, the cylindrical body 13
is pushed down by the rod 9, the upper plate 18 is lowered, and the mounting plate 15 is rotated 1/4 turn clockwise via the link 22 to be in a horizontal state. Then, when the cylindrical body 13 comes out from the small diameter part 14b of the cylinder 14 to the large diameter part 14a, the cylindrical body 13 expands in diameter and returns to the normal state (the state shown in FIG. 5), and from then on the rod 9 becomes cylindrical. It invades the body 13. Then, when the angular pin 7 enters the inclined hole 8, the slide core 6 moves forward to the right due to the lowering of the angular pin 7, and when the mold closing is completed, the cavity forming surface of the female mold 4
a, a cavity is formed by the mold side cavity forming surface 5a of the male mold 5 and the core side cavity forming surface 6a of the slide core 6 (see FIG. 1). Then, molding is performed.

As explained above, according to the insert molding die according to this embodiment, the second insert member 2 can be set when the second insert set pin 17 is located at a position facing the female mold 4. This allows the setting work to be carried out in the setting direction that coincides with the setting direction of the first insert member 1, which facilitates the setting work and reduces setting errors.

Furthermore, when the operator is located behind the slide core 6 and conventionally sets the second insert member 2 on the second insert set pin 17, the female mold 4 and the male mold 5 are separated when the mold is opened and closed. However, according to this embodiment, even if the interval is set relatively short, the second
Since the insert member 2 can be set on the second insert set pin 17, it is possible to downsize the insert molding die. Further, according to this embodiment, when the slide core 6 is in the retracted position, the core side cavity forming surface 6a
and the opposing surface portion 5b of the mold side cavity forming surface 5a of the male mold 5.
Even if the distance between the second insert member and the second insert member is set narrowly, there is no problem in setting the second insert member, so the stroke of the slide core 6 can be shortened, and the mold for insert molding can be made smaller.

■Second Embodiment (FIG. 7) In this embodiment, part of the mechanism for rotating the mounting plate 15 is composed of a rack 32 and a pinion 31, and the second insert member 2 is a bolt, and a slide The insert member holding portion 17 of the core 6 is configured with a fitting hole, and the other configurations are the same as in the first embodiment.

That is, the pin 30 is fixed to the mounting plate 15, the pinion 31 is fixed to the pin 30, and the pinion 31 is fixed to the pin 30.
The rack 32 is engaged with the male die 5, and the rack 32 is supported by the male die 5 so as to be movable up and down with respect to the male die 5, and the lower end of the rack 32 is fixed to the upper plate 18.

Then, when the upper plate 18 is pushed up by the push-up bar 26 during mold release, the rack 32 moves upward,
The pinion 31 rotates counterclockwise in the drawing, and the mounting plate 15 rotates counterclockwise. On the other hand, insert member 1,
After setting 2, the push-up bar 26 is lowered and the rod 9 is lowered, the upper plate 18 is pushed down, the rack 32 is moved downward, the pinion 31 is rotated clockwise in the drawing, and the mounting plate 15 is lowered. rotates clockwise.

[0034] Therefore, in this embodiment as well, similar to the first embodiment, it is possible to achieve effects such as facilitating the work of setting the insert member. Note that the bolt 2 is set in the fitting hole 17 via a disposable guide 33 in order to prevent material from going around to the trough of the bolt 2.

Although not shown in the drawings, the rotational drive mechanism for the mounting plate 15 may be constructed simply by an electric motor or the like. Further, in the above embodiment, the rotation angle of the mounting plate 15 is 90 degrees, but it goes without saying that the rotation angle is not limited to this.

[Brief explanation of drawings]

[Fig. 1] Cross-sectional view of the insert molding die according to the first embodiment during molding

[Figure 2] Cross-sectional view of the same mold halfway through when the mold is opened

[Figure 3] Cross-sectional view of essential parts of the same mold during demolding

[Figure 4] Cross-sectional view of the main parts of the same mold when insert members are set

[Figure 5] Cross-sectional view of the same mold during closing

[Figure 6] Cross-sectional view of a molded product manufactured using the same mold

[Figure 7
】Cross-sectional view of the insert molding die according to the second embodiment during mold closing

[Figure 8] Cross-sectional view of a conventional insert mold when the mold is closed

[Figure 9] Cross-sectional view of the same mold when insert members are set

[Explanation of symbols]

2 Insert member 3 Molded products 4 Female mold (other mold) 5 Male mold (one mold) 5a　Mold side cavity forming surface 5b Opposing surface part 6 Slide core 6a Core side cavity forming surface 15 Mounting plate 17 Insert member holding part

Claims (1)

[Claims] 1. A slide core and a pair of opening/closing molds, the slide core being able to move forward and backward in a direction different from the opening/closing direction of the molds. Provided on the mold side, a core-side cavity forming surface is formed on the front surface of the slide core, and an insert member holding portion into which the insert member is set is formed on the core-side cavity forming surface. The mold has a mold-side cavity forming surface, and the mold-side cavity forming surface has an opposing surface portion facing the core-side cavity forming surface. A mounting plate is provided on the mold side, and the slide core is integrally attached to the mounting plate while being allowed to move forward and backward, and when the slide core is in the retreat position, A mold for insert molding, characterized in that the core-side cavity forming surface of the slide core rotates by a predetermined angle in a direction toward a position facing the other mold of the pair of molds.