JPH0467921A - Injection molding and apparatus thereof - Google Patents

Abstract

PURPOSE:To manufacture a composite molded product having stabilized quality with a minimum of deformation during the processing if made of a sheet material having low rigidity by holding the long sheet material as inserted between the molds, cutting the same in a predetermined shape within the molds, causing the outer edge part thereof to be situated within a cavity, injecting a molten resin, and integrally molding the so injected resin and the outer edge of the sheet material into a frame structure. CONSTITUTION:By feeding a pressure oil to an oil chamber, a core 20 is caused to move to the molding position. On the way of the movement, the outer diameter part of the core 20 cuts a sheet material 30 in circle. Furthermore, the circumference of the sheet material 30 is bent by the tapered aperture 20a of the core 20. Molten resin is injected from an injection device to go through a sprue bush 28, a resin passage of mold 14 at the fixed side, a resin passage of a mold 16 at the movable side and a resin passage of an intermediate mold 18 and into a cavity. In this way, a composite molded product is formed wherein the resin and the circumference of the sheet material are integrally molded.

Description

[Detailed description of the invention] (b) Industrial application fields The present invention relates to an injection molding method and apparatus.

(B) Conventional technology A parabolic antenna for receiving satellite broadcasting is constructed by fitting and bonding a reinforcing frame into the contour of a sheet member that serves as a parabolic surface. Conventionally, the sheet member was formed into a parabolic shape by punching with a press machine, while the reinforcing frame was formed by injection molding or the like, and these were glued together manually. In addition, there is also a sheet member molded as described above, which is manually positioned and attached to the mold of an injection molding machine, and the mold is clamped to injection mold the frame. By doing so, it is possible to manufacture a parabolic antenna in which the sheet member and the frame are integrated.

(c) Problems to be Solved by the Invention However, in the conventional parabolic antenna for satellite broadcast reception as described above, the rigidity of the sheet member alone is low, so it is easily deformed and difficult to handle. can be,
There was a problem in that the production efficiency of parabolic antennas was low. Furthermore, since the sheet member is easily deformed, it has been difficult to mechanize the manufacture of parabolic antennas.

The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention involves sandwiching a sheet member between molds, cutting the sheet member into a predetermined external shape in this state, and cutting the sheet member into a predetermined shape in the molded sheet member as it is or within the mold. The above-mentioned problem is solved by positioning the molded sheet member in a molding position and integrally injection molding the sheet member. That is, in the injection molding method of the present invention, a long sheet member is held between molds, cut into a predetermined shape within the mold, and the outer edge of the cut molded sheet member is inserted into a cavity. The frame body is integrally formed on the outer edge of the molded sheet member by injecting molten resin into the cavity, and the mold is opened to take out the molded product.

Furthermore, an injection molding apparatus according to claim 2 of the present invention for carrying out the above method includes a fixed mold (14) disposed on the fixed mold mounting plate (10) and a movable mold mounting plate. (12
) is fixed to the movable side mold (16), and both molds (14,
16) An intermediate mold (18) placed between the two molds (1
A core (20) provided movably in the mold opening/closing direction in either or both (14) of 4 and 16), and a core (20) disposed between the movable mold (16) and the intermediate mold (18). , a die lock mechanism (2
2) and a mold opening interval limiter which is arranged between the stationary mold (14) and the intermediate mold (18) and restricts the interval in the mold opening direction when these molds are opened from exceeding a predetermined size. mechanism(
24), and between either one (14) of both molds (14, 16) and the intermediate mold (18), there is a sheet member (
A gap (14e) is formed to sandwich the sheet member (30), and the core (20) can cut the sheet member (30) by moving in a direction perpendicular to the mold parting surface. Fixed side mold (14) or movable side mold (
16), a cavity (C) is formed by the intermediate mold (18), the core (20) and the cut molded sheet member (30a).
is formed, and the intermediate mold (18) has a die lock mechanism (22) when the mold is closed.
) is connected to the movable side mold (16) through the mold, and when the mold is opened, it separates from the movable side mold (16) and is located a predetermined distance away from the fixed side mold (14) in the mold opening direction. It is now located in

The injection molding apparatus according to claim 3 of the present invention also includes a fixed mold (54) disposed on the fixed mold mounting plate (50).
), a movable mold (56) fixed to the movable mold mounting plate (52), an intermediate mold (58) disposed between both molds (54, 56), and both molds (54).・A core (60, 62) arranged movably in the mold opening/closing direction on both or one of the molds (54, 56), one mold (54) and one core (60) An intermediate core (64) disposed in between so as to be movable relative to these in the mold opening/closing direction, and a movable mold (56) and an intermediate mold (58) to be connected or separated. Between the die lock mechanism (66) capable of this, the stationary mold (54), and the intermediate mold (58), the distance in the mold opening direction when these molds are opened is limited so that it does not exceed a predetermined size. It has a mold opening interval limiting mechanism (68), and a sheet that becomes a part of the molded product is provided between one of the two molds (54, 56) and the intermediate mold (58). Element(
A gap (54f) is formed in which the sheet member (70) is inserted, and the intermediate core (64) can cut the sheet member (70) by moving in a direction perpendicular to the mold parting surface. Yes, fixed side mold (54) or movable side mold (56), intermediate mold (58), core (60 and 62)
, intermediate core (64) and cut molded sheet member (7
A cavity (C) is formed by 0a), and the intermediate mold (58) has a die lock mechanism (66) when the mold is closed.
) is connected to the movable side mold (56) through the mold, and when the mold is opened, it separates from the movable side mold (56) and is located a predetermined distance away from the fixed side mold (54) in the mold opening direction. It is now located in Note that the symbols in parentheses indicate corresponding members in the embodiment.

(E) Operation The long sheet member is cut into a predetermined external shape while being sandwiched between the mold and the intermediate mold.

After the sheet member is molded into a predetermined shape as necessary, the sheet member is positioned at a molding position facing the cavity, and molten resin is injected into the cavity. Open the mold and take out the molded product. Thereby, a molded product in which the sheet member and the frame are integrally molded can be manufactured. All processes from cutting the sheet material to injecting the molten resin are performed within the mold, so even sheet materials with low rigidity are less likely to deform during processing, making it possible to produce composite molded products of stable quality. can be manufactured.

(F) Embodiment Figures 1 to 3 show a first embodiment of the present invention. A movable mold mounting plate 12 is provided facing the fixed mold mounting plate 10. The movable mold mounting plate 12 is movable between a mold closed position shown in FIG. 1 and a mold open position shown in FIG. 3 by a mold clamping cylinder (not shown). A fixed mold 14 is fixed to the fixed mold mounting plate 10, and a movable mold mounting plate 12 is fixed to the fixed mold mounting plate 10.
A movable mold 16 is fixed to the movable mold 16. Movable side mold 16
has a 63-shaped cross section, and a ring-shaped intermediate mold 18 is disposed between the step part of the stationary mold 14 and the movable mold 16. It is guided so as to be movable in the mold opening/closing direction while remaining parallel to both molds 14 and 16 by a guide mechanism (not shown).On the side of the stationary mold 14 facing the intermediate mold 18, there is a sheet member to be described later. A gap 14e is provided for inserting 30. Gap 1
4e is between the end surface 14a of the fixed side mold 14 on the left side in the figure and the end of the intermediate mold 18 on the right side in the figure, and the fixed side mold 14.
and the end surface 16c of the movable mold 16 on the right side in the figure.
It is formed between the A ring-shaped hole is formed on the parting surface side of the stationary mold 14, and a ring-shaped core 20 is fitted into the hole.

The outer diameter portion of the core 200 on the left side in the figure can be fitted with the inner diameter portion 18a of the intermediate mold 18.

A tapered hole 20a is formed in the inner diameter of the left end of the core 20 in the figure, and a tapered convex portion], 6e is formed at a location corresponding to the taper hole 20a of the movable mold 16. . A groove 16f having an rUJ-shaped cross section is formed on the left side of the large diameter portion of the tapered convex portion 16e of the movable mold 16, and forms a part of the wall of a cavity C, which will be described later.

The core 20 is movable between a standby position in the mold shown in FIG. 1 and a molding position shown in FIG. 2 in which it is fitted into the intermediate mold 18. A supply roll 26 around which a sheet member 3o is wound is arranged above both molds 14 and 16 in the figure.
Similarly, a winding roll 27 for winding up a sheet remaining material 31, which will be described later, is arranged at the lower part of the figure. A sprue bushing 28 is fixed to the fixed mold mounting plate 10. The sprue bushing 28 is fitted into the stationary mold 14, and its resin passage is connected to the resin passage 14b of the stationary mold 14 and the resin passage 18b of the intermediate mold 18, as shown in FIG.
, communicates with the resin passage 16b of the movable mold 16 and the cavity C. These resin passages 14b, 18b and 1
6b is formed at two locations, upper and lower in FIG. Die lock mechanisms 22 are fixed to the movable mold 16 and the intermediate mold 18 at upper and lower positions in FIG. Die lock mechanism 22
Although the details are omitted, the movable mold 1 shown in FIG.
It is possible to take two states: a connected state in which the movable mold 16 and the intermediate mold 18 are connected, and a released state in which the movable mold 16 and the intermediate mold 18 shown in FIG. 3 are released. Mold opening interval limiting mechanisms 24 are attached to the upper and lower positions of the intermediate mold 18 and the stationary mold 14 in FIG. Mold opening interval limiting mechanism 24
It is possible to restrict the intermediate mold 18 from being separated from the stationary mold 14 by more than a predetermined distance when the mold is opened. As a result, when the mold is opened, the intermediate mold 18 is first separated from the fixed mold 14 by a predetermined distance, then the die lock mechanism 22 is released, and the intermediate mold 18 is separated from the movable mold 16. .

Next, the operation of this first embodiment will be explained. First, in the mold open state, the sheet member 30 wound around the supply roll 26 is passed between the stationary mold 14 and the intermediate mold 18 and wound around the take-up roll 27. In addition, the core 20 is
Pressure oil is supplied to the oil chamber 14C of the stationary side mold 14, and the mold is placed in the standby position shown in FIG. Gap 14e
caught in between. The movable mold 14 and the intermediate mold 18 are connected to each other by a die lock mechanism 22. Next, the pressure oil in the oil chamber 14C is released, and the oil chamber 1 is opened as shown in the second figure.
Pressure oil is supplied to 4d to move the core 20 to the molding position. During this movement, the outer diameter part of the core 20 is attached to the sheet member 30.
Cut into a circle. Further, the peripheral portion of the sheet member 30 is bent by the tapered hole portion 20a of the core 20.

As a result, a deep dish-shaped molded sheet member 30a is formed. In this state, a cavity C is formed by the movable mold 16, the core 20, and the molded sheet member 30a. After the mold is clamped, the sprue bushing 28, the resin passage 14b of the stationary mold 14, and the movable mold 1 are released from an injection device (not shown).
6 resin passage 16b and intermediate mold 18 resin passage 818b
Molten resin is injected into cavity C through. As a result, a composite molded product 30b whose frame body is integrally molded with the peripheral portion of the molded sheet member 30a is molded (see FIG. 3).
. After cooling the core 20, pressure oil is supplied to the oil chamber 14c.
to the standby position. Next, the mold is opened. Second
When the movable mold mounting plate 12 is moved leftward from the state shown in the figure, the movable mold 16 and the intermediate mold 18 are also moved leftward together. As a result, the string member of the mold opening interval limiting mechanism 24 is tensed as shown in FIG. 3, and the die lock mechanism 22 is finally released. As a result, the intermediate core 18 remains in the restricted position, and the movable mold mounting plate 12 and the movable mold 16 move to the mold open position. The composite molded product 30b remains in the movable mold 16, and the remaining sheet material 31 remaining after cutting the molded sheet member 30a from the sheet member 30 remains in the fixed mold. The composite molded product 30b is placed in the movable mold 16.
Then, the winding roll 27 is rotated to wind up the remaining sheet material 31, and a new sheet member 30 is supplied and positioned on the stationary mold 14. Fixed side mold 14 and intermediate mold 1
Since a predetermined distance M is maintained between the sheet member 8 and the sheet member 8, the sheet remaining material 31 and the sheet member 30 can be smoothly moved. By closing the mold again and repeating the same operation thereafter, a deep dish-shaped composite molded product 30b can be continuously molded.

Next, a second embodiment of the present invention is shown in FIGS. 4 to 7.

In this embodiment, in addition to the configuration of the first embodiment, a core is also provided in the movable side mold, which makes it possible to form a right-angled bent portion in the molded sheet member as described later. . A ring-shaped intermediate mold 38 is arranged between the fixed mold 34 and the movable mold 36. Fixed side mold 34
A ring-shaped hole is formed in the hole, and a ring-shaped fixed-side core 40 is fitted into the hole. Fixed side core 40
A large-diameter hole 34a that becomes a part of the wall of a cavity C, which will be described later, is formed in the inner diameter portion on the left end side in the figure.

The movable mold 36 has a convex portion 36e formed in the center thereof, and a groove portion 36f which becomes a part of the wall of a cavity C to be described later. A ring-shaped hole having a diameter smaller than that of the fixed-side core 40 is formed, and a ring-shaped movable-side core 42 is fitted into this hole. Fixed side core 40
are the standby position in the stationary mold 34 shown in FIG. 4, and the sixth
It is movable between a molding position where a portion is fitted into the inner diameter part 38a of the intermediate mold 38 shown in . Furthermore, the movable side core 42 is formed by inserting the sheet member 30 shown in FIG. 4 into the fixed side mold 34.
It is movable between a pressing position where it is pressed towards the mold 36 and a molding position shown in FIG. 6 where it has entered the movable mold 36. The movable mold 36 and the intermediate mold 38 are provided with a die lock mechanism 44 that can connect or disconnect them. In addition, the intermediate mold 38 and the fixed side mold 34
is provided with a mold opening interval limiting mechanism 46 that limits the interval when these molds are opened. The die lock mechanism 44 has a first
The same die lock mechanism 22 of the embodiment is used, and the mold opening interval limiting mechanism 46 is the same as the mold opening interval limiting mechanism 24 of the first embodiment.

The operation of this second embodiment will be explained. Pressure oil is supplied to the oil chamber 34d of the stationary mold 34, and the stationary core 40 is placed at the standby position. Further, pressure oil is supplied to the oil chamber 36c of the movable mold 36 to position the movable core 42 at the pressing position. The mold is closed in this state. At this time, the intermediate core 38 is guided by a guide mechanism (not shown) so as to move in the mold closing direction while remaining parallel to both the molds 34 and 36, as in the first embodiment. The sheet member 30 has an end surface 34e on the left end side in the figure of the stationary side mold 34 and a movable side mold 36.
The amount in the figure is also inserted into the gap formed by the right end surface 36a and the like. The end portion 42a of the movable core 42 presses and fixes the sheet member 30 toward the stationary mold 34. As shown in FIG. 5, pressurized oil is supplied to the oil chamber 34c to move the stationary core 40 from the standby position to the operating position to cut the sheet member 30 into a predetermined shape. The sheet member 30 is bent at right angles by the inner diameter portion 40c to form a cylindrical molded sheet member 30c with a bottom (see FIG. 5). Pressure oil is supplied to the oil chamber 36d of the movable mold 36 to move the movable core 42 to the molding position shown in FIG. 6 to form the cavity C. The mold is clamped, and molten resin is injected into the cavity C from an injection device (not shown) through the sprue bush 28 and the resin passages 34b, 36b, and 38b. As a result, a tea caddy-shaped composite molded product 30d whose frame is integrally molded with the peripheral portion of the molded sheet member 30c is molded. After cooling, the stationary core 40 is moved to the standby position, and the movable core 42 is positioned to the pressing position. The mold is opened and the composite molded product 30d is taken out. Die lock mechanism 44 when opening the mold
The mold opening interval limiting mechanism 46 operates in the same manner as in the first embodiment. - Supply the next sheet member 30 between the molds 34 and 38, and repeat the same operation. Thereby, the tea caddy-shaped composite molded product 30d can be continuously manufactured.

Next, a third embodiment of the present invention is shown in FIGS. 8 to 12. In this embodiment, in addition to the structure of the second embodiment, one of the cores is further provided with a nesting core, which allows reinforcing members to be attached to the outer edge of the flat molded sheet member as described later. It is possible to mold it. A fixed mold 54 is fixed to the fixed mold mounting plate 50, and a movable mold 56 having a concave cross section is fixed to the movable mold mounting plate 52.

The movable mold mounting plate 52 has a mold closing position shown in FIG.
It is movable between the mold opening position shown in FIG. A ring-shaped intermediate mold 58 is provided between the fixed mold 54 and the movable mold 56.
is located. A stepped cylindrical hole is formed in the stationary mold 54, and a bottomed cylindrical intermediate core 64 is fitted into the stepped cylindrical hole. The intermediate core 64 is movable between a standby position shown in FIG. 8 and a molding position shown in FIG. 11 in which a portion thereof is fitted into the hole 58a of the intermediate mold 58.

In the cylindrical hole of the intermediate core 64, there is a stepped shaft-shaped stationary core 60.
are fitted together. The stationary core 60 is movable between a standby position shown in FIG. 8 and a molding position shown in FIG. 11 in which a portion thereof is inserted into the intermediate mold 58. Although the fixed side mold 54 and the intermediate core 64 are shown as being integral, they are actually each made up of a plurality of members for ease of assembly. A cylindrical movable core 62 is fitted into the hole of the movable mold 56. The movable core 62 is prevented from moving to the right in the figure from the pressed position shown in FIG. 8 by a restriction member (not shown). The movable core 62 is movable between a pressing position shown in FIG. 8 and a molding position shown in FIG. 11. A ring-shaped space is formed between the inner diameter part 58a of the intermediate mold 58 and the outer diameter part 62a of the movable core 62, and as will be described later, the intermediate core 64 obtained by cutting the seed member 70 is inserted into the mold. It is possible to fit into the space of The movable mold 56 and the intermediate mold 58 are provided with a die lock mechanism 66 that can connect or disconnect them.

Further, the intermediate mold 58 and the stationary mold 54 are provided with a mold opening interval limiting mechanism 68 that limits the interval when these molds are opened. The die lock mechanism 66 is the same as the die lock mechanism 22 of the first embodiment, and the mold opening interval limiting mechanism 68 is the same as the mold opening interval limiting mechanism 24 of the first embodiment. .

Next, the operation of this third embodiment will be explained. Fixed side mold 54
Pressure oil is supplied to the oil chambers 54c and 54e of the intermediate mold 5.
8 and fixed-side core 60 are respectively positioned at standby positions. Pressure oil is also supplied to the oil chamber 56a of the movable mold 56 to position it at the pressing position (. In this state, the mold is closed. As a result, the sheet member 70 is inserted into the gap 54a.

Pressurized oil is supplied to the oil chamber 54a of the stationary mold to remove the intermediate core 64.
is moved to the left in the figure, and the sheet member 70 is cut.
A circular shaped sheet member 70a is formed. Intermediate core 6
The stepped portion on the outer side of the intermediate core 64 comes into contact with the stepped portion of the hole of the stationary mold 54, and the intermediate core 64 is stopped at the position shown in FIG. The cut sheet member 70 is thereby moved to the position shown in FIG. 10. Next, the oil chamber 54 of the fixed side mold 54
Pressure oil is supplied to d to move the stationary core 6o to the molding position shown in FIG. At this time, the oil chamber 5 of the movable mold 56
The pressure oil 6a is released so that the movable core 62 is pressed to the molding position shown in FIG. By doing this, the movable side core 62, the movable side mold 56, and the intermediate mold 5
8. Intermediate core 64, stationary core 60, and sheet member 70
A cavity C is formed by a. Perform mold clamping,
Molten resin is injected into the cavity C from an injection device (not shown) through the sprue bush 28, the resin passage 54b of the stationary mold 54, the resin passage 58b of the intermediate mold 58, and the resin passage 56b of the movable mold 56. eject. As a result, a composite molded product 70b in which a ring-shaped resin frame is integrally molded around the periphery of a disc-shaped sheet member is manufactured (see Fig. 12). After this is cooled, the mold is opened. Composite molded product 7
0b is taken out, the winding roll 27 is driven to wind up the sheet remaining material 71, and a new sheet member 70 is placed in the mold 54.
and 58. By repeating the above operations, the disk-shaped composite molded product 70b can be continuously manufactured.

In the above description, it is assumed that a reinforcing frame is molded on the molded sheet member, but the invention is not limited to this. For example, the outer edge of a mesh member with low rigidity may be held with a resin frame. Can be used to form sieves, etc.

Furthermore, in the above description, the cut shapes of the sheet members 30 and 70 are circular, but the cut shapes may be rectangular or other shapes.

(g) As described in detail, according to the present invention, a composite molded product is produced in which a reinforcing resin material is integrally formed around a low-rigidity sheet member cut into a predetermined shape. I can do it. Since all processes from cutting the sheet member to composite molding can be performed within the mold, deformation of the sheet member can be prevented and production efficiency of parabolic antennas and the like can be improved.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an injection molding apparatus according to a first embodiment of the present invention;
FIG. 2 is a sectional view taken along line II-IX in FIG. 1, FIG. 3 is a sectional view explaining the mold opening situation, and FIG.
5 is a cross-sectional view of the injection molding apparatus of the example, FIG.
7 is a partial sectional view illustrating the mold opening situation, FIG. 8 is a sectional view of an injection molding apparatus according to a third embodiment of the present invention, and FIG. 9 is a sectional view taken along line VI-VI in the figure. 8 is a sectional view taken along line IX-IX in FIG. 10, FIG. 10 is a sectional view showing the sheet member cut, FIG. 11 is a sectional view showing the sheet member positioned at the molding position, and FIG. It is a partial sectional view explaining the mold opening situation. 10... Fixed mold mounting plate, 12... Movable mold mounting plate, 14... Fixed side mold, 16... Movable side mold, 18
... Intermediate mold, 20 ... Core, 22 ... Die lock mechanism, 24 ... Mold opening interval limiting mechanism, 30 ... Sheet member, 34 ... Fixed side mold, 36 ...・Movable side mold, 38... Intermediate mold, 40... Fixed side core, 42.
...Movable side core, 44...Die lock mechanism, 46...
Mold opening interval limiting mechanism, 50...Fixed mold mounting plate, 52.
...Movable mold mounting plate, 54...Fixed side mold, 56...
- Movable side mold, 58... Intermediate die, 60... Fixed side core, 62... Movable side core, 64... Intermediate core, 6
6... Die lock mechanism, 68... Mold opening interval limiting mechanism, 70... Sheet member. Patent applicant: Japan Steel Works Co., Ltd.
People Patent Attorney Toshiyuki Miyauchi

Claims (1)

[Claims] 1. A long sheet member is held between molds, cut into a predetermined shape within the mold, and the outer edge of the cut sheet member is placed in the cavity. An injection molding method in which a frame is integrally formed on the outer edge of a molded sheet member by injecting molten resin into a cavity, and the mold is opened to take out the molded product. 2. A fixed mold (14) placed on the fixed mold mounting plate (10), a movable mold (16) fixed to the movable mold mounting plate (12), and both molds (14).・16) An intermediate mold (18) disposed between the two molds (14, 16), or a core (14) provided movably in the mold opening/closing direction in both or one of the molds (14, 16).
20), a die lock mechanism (22) disposed between the movable mold (16) and the intermediate mold (18) and capable of connecting or separating them, and the fixed mold (14) and the intermediate mold. It has a mold opening interval limiting mechanism (24) disposed between the molds (18) and restricting the interval in the mold opening direction when opening these molds from exceeding a predetermined size. Between either one of the molds (14, 16) (14) and the intermediate mold (18), a sheet member (
A gap (14e) is formed to sandwich the sheet member (30), and the core (20) can cut the sheet member (30) by moving in a direction perpendicular to the mold parting surface. A cavity (C) is formed by the fixed side mold (14) or the movable side mold (16), the intermediate mold (18), the core (20), and the cut molded sheet member (30a). The mold (18) has a die lock mechanism (22) when the mold is closed.
) is connected to the movable side mold (16) through the mold, and when the mold is opened, it separates from the movable side mold (16) and is located a predetermined distance away from the fixed side mold (14) in the mold opening direction. An injection molding device characterized by being located in. 3. A fixed mold (54) placed on the fixed mold mounting plate (50), a movable mold (56) fixed to the movable mold mounting plate (52), and both molds (54).・A core (56) disposed between the intermediate mold (58) and both molds (54, 56) or either one (54, 56) so as to be movable in the mold opening/closing direction. 60, 62) and one mold (5
4) and an intermediate core (64) disposed between one of the cores (60) so as to be movable relative to these in the mold opening/closing direction;
A die lock mechanism (6) is provided between the movable side mold (56) and the intermediate mold (58) to connect or disconnect them.
6), and a mold opening interval limiting mechanism (54) between the stationary mold (54) and the intermediate mold (58) to limit the interval in the mold opening direction when opening these molds from exceeding a predetermined size. 68), and between either one (54) of both molds (54, 56) and the intermediate mold (58), there is a sheet member (58) that will become a part of the molded product.
A gap (54f) is formed in which the intermediate core (64) is inserted, and the intermediate core (64) can cut the sheet member (70) by moving in a direction perpendicular to the mold parting surface. Yes, by the fixed side mold (54) or the movable side mold (56), the intermediate mold (58), the cores (60 and 62), the intermediate core (64) and the cut molded sheet member (70a). A cavity (C) is formed, and the intermediate mold (58) has a die lock mechanism (66) when the mold is closed.
) is connected to the movable side mold (56) through the mold, and when the mold is opened, it is separated from the movable side mold (56) and is located a predetermined distance away from the fixed side mold (54) in the mold opening direction. An injection molding device characterized by being located in.