JP2517099Y2 - Foam molding die for different hardness bare headrest - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam molding die for a bare headrest of different hardness in which a pillow portion is formed from two or more foams having different hardness.

[0002]

2. Description of the Related Art A bare headrest of different hardness is used as a headrest of an automobile by covering the pillow portion with a skin, and as shown in FIG. 4, the contact portion 10 with the head is usually softer than other portions. Composed of different hardness members made of foam,
It feels soft when it comes into contact with the head. By the way, the applicant of the present invention has proposed a foam molding die which can easily mold the above-mentioned bare headrest with different hardness and does not cause a trouble such as tearing in the pillow portion of the headrest when the bare headrest with different hardness is released. -324146. As shown in the sectional view of FIG. 5, the foaming mold has partition plates 14 and 15 that face a part of the cavity surface 12 with a predetermined distance therebetween.
The partition plates 14 and 15 facing each other
At least one of them, in the figure, both are positioned in the mold dividing portion, and the partition plate base is hinged to the mold dividing surfaces 20, 22 by a hinge or the like so as to be sandwiched between the mold dividing surfaces, and the partition plate
The split dies 17, 19 and 21 sandwiching the bases 14 and 15 are rotatably connected to each other by a hinge or the like so that the partition plates 14 and 15 can be rotated when the dies are opened. The partition plates 14 and 15 facing each other are sandwiched between the mold dividing surfaces with their tips inclined so that the different hardness members 16 described later fall off from the cavity surface. Further, in the foam mold shown in this figure, the split mold 21 is a fixed mold,
The other split molds 17, 19, 23 are movable.

Molding of a bare headrest of different hardness using the foaming mold is carried out as follows. First split type 1
Rotate 7, 19, 23 in the direction of the arrow to open the foam mold,
A different hardness member 16 made of foam having a predetermined hardness is arranged on the cavity surface 12a defined by the partition plates 14 and 15, and the different hardness member 16 is sandwiched between the partition plates 14 and 15 and partitioned by the partition plates. The cavity surface 12a is held. Thereafter, the foaming mold is closed and the liquid foaming raw material 24 is injected into the cavity 18 to foam-mold the pillow portion integrally with the different hardness member 16. After the foaming is completed, the foaming mold is opened and the partition plates 14 and 15 are rotated in the direction of the arrow to take out the bare headrest with different hardness. In the figure, 26 is an insert.

At the time of molding the bare headrest with different hardness, an undercut shape is formed by the partition plate in the cavity of the molding die defined by the partition plate, and the undercut shape is formed by the rotation of the partition plates 14 and 15 when the mold is opened. Undercut shape is eliminated. Therefore, it is possible to efficiently form the bare headrest with different hardness without making it difficult to take out the bare headrest with different hardness or causing a trouble such as a part of the bare headrest with different hardness being caught by the partition plate and being broken. Further, since the different hardness member 16 is sandwiched between the partition plates 14 and 15, the different hardness member is injected and foamed when the liquid foaming raw material is injected.
It is unlikely that 16 will be displaced.

In the foaming mold, the cavity surface 12a defined by the partition plates 14 and 15 is usually a movable lower mold split mold from the viewpoint of ease of setting different hardness members and taking out different hardness bare headrests. It is provided at 19. Therefore, when the different hardness member 16 is set in the mold open state, the partition plates 14 and 15 do not separate from the mold dividing surfaces 20 and 22 of the lower mold by their own weight, and the tips of the partition plates 14 and 15 remain inclined so as to approach each other. It becomes the state of. Therefore, when trying to place the different hardness member 16 on the cavity surface 12a partitioned by the partition plate in that state, it is difficult to place the different hardness member 16 on the cavity surface 12a because the tips of the partition plates 14 and 15 interfere. Rotate the partition plates 14 and 15 with one hand in the direction of the arrow to partition plate 1.
It was necessary to place the different hardness member 16 on the partitioned cavity surface 12a with the other hand while holding the ends of 4 and 15 in an expanded state. However, it is hard to say that it is excellent in workability to set the different hardness member on the cavity surface partitioned by the other hand while lifting the partition plate with one hand.
Moreover, since the different hardness member is usually made of a soft foam slab or the like and easily deformed such as twisting, it was not easy to set the different hardness member on the cavity surface correctly with one hand in a short time.

[0006]

SUMMARY OF THE INVENTION In view of the above points, the present invention intends to provide a foam molding die for a bare headrest of different hardness in which a different hardness member can be easily set on the cavity surface defined by the partition plate. To do.

[0007]

In order to achieve the above-mentioned object, the present invention defines a part of a cavity surface by partition plates facing each other at a predetermined distance, and foams having a predetermined hardness on the partitioned cavity surface. A different hardness member composed of a body can be sandwiched and held by partition plates, and at least one of the facing partition plates is located in the mold dividing portion, and the base of the partition plate is hinged to the mold dividing surface. In the foam molding die for a bare headrest of different hardness, wherein the partition plates are sandwiched between the mold split surfaces and the partition plate bases are rotatably connected to each other so that the partition plates can rotate when the mold is opened. In another split mold which sandwiches the base of the rotatable partition plate (hereinafter referred to as a rotary partition plate) in combination with a split mold having a cavity surface partitioned by, the rotary partition plate is pulled by a pulling body such as a wire. Connect Rotation of the split mold opening of the mold is to that to the rotary partition plate is rotated by being pulled by the towing member.

[0008]

The foaming mold is combined with a split mold having a cavity surface divided by a partition plate, and the rotary partition plate is connected to another split mold sandwiching the base of the rotary partition plate by a pulling body such as a wire. Has been done. Therefore, when the split mold rotates and the foaming mold opens, the rotary partition plate is automatically rotated by being pulled by the traction body in the direction away from the cavity surface partitioned by the partition plate, and the other partition that faces the partition wall is rotated. Spread the gap between the plate and the tip. Further, while the mold is open, the rotary partition plate is held in a state in which a space between the tips of the other partition plates facing each other is widened. Therefore, when setting the different hardness member on the cavity surface partitioned by the partition plate, it is not necessary to lift the rotary partition plate by hand, and the different hardness member can be set by both hands.

[0009]

Embodiments of the present invention will be described below. FIG.
2 is a cross-sectional view of a foaming mold according to an embodiment of the present invention, FIG.
FIG. 3 is a perspective view of a part of the foaming mold, and FIG. 3 is a sectional view showing the foaming mold in an open state. The foam molding die 27 of this embodiment is composed of two upper dies 28, 30 and two lower dies 32, 34, a total of four divided dies, and a product-shaped cavity 36 is formed therein. 38a, 38b, 40a, 40
Reference numerals b, 42a, 42b, 44a and 44b are mold dividing surfaces. Upper mold 2
The lower molds 32 and 34 are connected to the lower molds 8 and 30 by hinges 46, 48 and 50 so as to be opened and closed. Mold dividing surfaces 38a, 38b of two upper molds
A hole 52 for inserting the stay of the insert and a hole 54 for injecting the foaming raw material are formed in this. In addition, one upper mold 28,
A traction body insertion hole 39 extending from the outer surface of the upper portion to a die dividing surface 44b of the lower die 34 is formed so as to penetrate a traction body 41 such as a wire. One end of the traction body 41 projects to the outer surface of the upper mold 28, and a stopper 43 made of a rod or the like having a size larger than the diameter of the traction body insertion hole 39 is attached to one end of the traction body 41, while the other end rotates as described later. It is locked to the partition plate 58.

On the other hand, one of the lower molds 32 has the lower mold
Another traction body insertion hole 45 extending from the side outer surface of 32 to the mold dividing surface 42b of the other lower die 34 is formed through the traction body insertion hole.
A traction body 47 similar to the above is inserted in 45. The puller 47 has a stopper 49 similar to the one described above attached to one end, and the other end locked to a rotary partition plate 56 described later. On the other hand, the other lower mold 34 is provided with a pair of opposing rotary partition plates 56, 58.
Is provided on the mold dividing surfaces 42a and 44a, and the rotary partition plate 5 thereof is provided.
A pair of opposed fixed partition plates 60 and 62, which are located at both ends of 6 and 58 and are substantially orthogonal to the rotary partition plates 56 and 58, form a cavity surface 64.
It is installed upright. A part of the cavity surface 64 of the lower die is partitioned by these partition plates, and a different hardness member 66 described later is sandwiched and held by the partitioned cavity surface 64a. The cavity surface 64a defined by the partition plate is usually a portion that forms the head contact surface of the different hardness bare headrest.

The rotary partition plates 56, 58 are made of metal or hard resin, and the tips of their bases 56a, 58a are rotatably attached to the mold dividing surfaces 42a, 44a by hinges 68, 70. In the middle of the bases 56a and 58a of the rotary partition plate, the ends of the traction bodies 41 and 47 inserted into the traction body insertion hole 39 of the upper die 28 or the traction body insertion hole 45 of the one lower die 32. The part is locked. Then, the mold dividing surfaces 42a, 42b, 44
The bases 56a, 58 of the rotary divider when a, 44b are closed
a is sandwiched between the mold dividing surfaces, and the rotating partition plate is held so as to be closer to each other in the cavity as the tip end thereof is approached,
On the other hand, when the mold is opened, the rotating partition plates 58 and 56 are pulled by the tow bodies 41 and 47 by the rotation of the upper mold 28 and the lower mold 34, and are rotated in the direction away from the cavity surface 64a partitioned by the partition plates. ing. The rotating partition plate may be only one of the partition plates facing each other depending on the mold structure and the like, and the other partition may be the fixed partition plate. Meanwhile, fixed partition plates 60, 62
Is preferably provided so that an undercut is not formed in the cavity in order to make it easier to take out the different hardness bare headrest which is a molded product from the foaming mold.

Molding of the bare headrest with different hardness, which is carried out by using the foam molding die of the above-mentioned embodiment, is carried out as follows. First, the upper molds 28, 30 and the lower mold 34 are rotated to open the foam molding die 27. Thereby, the towing bodies 41, 47
However, the rotary partition plate 5 is further connected via the tow bodies 41 and 47.
8 and 56 are respectively pulled in the rotating direction of the upper mold 28 and the lower mold 34, and the rotating partition plates 56 and 58 automatically rotate away from the cavity surface 64a partitioned by the partition plates, and the opposing rotations occur. The space between the tips of the partition plates 56, 58 expands. Next, a different hardness member 66 (shown by a chain double-dashed line in FIG. 1) made of a slab of soft polyurethane foam is placed on the cavity surface 64a defined by the partition plate. Then close the foam mold,
The different hardness member 66 is sandwiched between the rotary partition plates 56 and 58 and the fixed partition plates 60 and 62 to be retained on the cavity surface 64a defined by these partition plates, and mainly for the embedding portion for reinforcement and for mounting. An insert 72 consisting of a stay (shown by a chain double-dashed line in FIG. 1) is held in the cavity 36 in a space by using the hole 52 for inserting the stay when the mold is closed. After that, a liquid foaming raw material that forms a foam having a hardness higher than that of the different hardness member 66, for example, a polyurethane foam raw material is injected through the hole 54 for injecting the foaming raw material into the cavity, and the different hardness member 66 and the insert 72 are integrated with the pillow. The part is foam-molded, and then the foam mold is opened and the bare headrest with different hardness is taken out.

[0013]

As described above, in the foam molding die for a bare headrest with different hardness of the present invention, the rotating partition plate is automatically rotated by the rotation of the split mold when the mold is opened as described above. Widen the tips and maintain that state during mold opening. Therefore, when setting the different hardness member on the cavity surface partitioned by the partition plate, it is not necessary to perform the work while lifting the rotary partition plate with one hand, and the different hardness member can be set on the cavity surface with both hands. The work is extremely easy.

[Brief description of drawings]

FIG. 1 is a sectional view of a foaming mold according to an embodiment of the present invention.

FIG. 2 is a perspective view of a part of the foaming mold shown in FIG.

FIG. 3 is a sectional view showing the foaming mold shown in FIG. 1 when the mold is opened.

FIG. 4 is a sectional view of a bare headrest with different hardness.

FIG. 5 is a cross-sectional view showing a conventional foaming mold.

[Explanation of symbols]

28: Upper mold (split type in which the rotary partition plate is connected by the towing body) 32: Lower mold (split type in which the rotary partition plate is connected by the tow body) 34: Lower mold (the base of the rotary partition plate is hinged 36: Cavity 41: Traction body 42a: Mold division surface 44a: Mold division surface 47: Traction body 56: Rotating partition plate 58: Rotating partition plate 56a: Rotating partition plate base 58a: Rotating partition plate base 60 : Fixed partition plate 62: Fixed partition plate 64: Cavity surface 64a: Cavity surface partitioned by partition plate 66: Different hardness member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location // B29K 105: 04 B29L 31:58

Claims (1)

(57) [Scope of utility model registration request] 1. A partition plate facing each other at a predetermined interval may partition a part of a cavity surface, and a different hardness member made of foam having a predetermined hardness may be sandwiched and held by the partition plate on the partitioned cavity surface. At the same time, at least one of the facing partition plates is located in the mold dividing portion, the base of the partition plate is hinged to the mold dividing surface and sandwiched between the mold dividing surfaces, and the partition plate base is sandwiched. A foam molding mold for a bare headrest with different hardness, wherein the partition plates are rotatably connected to each other so that the partition plates can rotate when the mold is opened, in combination with a split mold having a cavity surface partitioned by the partition plates. The rotatable partition plate is connected to another split mold that sandwiches the base of the rotatable partition plate by a towing body such as a wire, and the rotatable partition plate is a tow body when the split mold rotates when the mold is opened. Pulled A foaming mold for bare headrests of different hardness, which is adapted to rotate.