JP2517100Y2 - 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 Prior 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. 6, the head receiving surface 10 is usually softer than other parts. The different hardness member 16 is formed so that the feel when touching the head is soft. 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 cross-sectional view of FIG. 7, the foam mold has a cavity surface.
Part of 12 is divided by partition plates 14 and 15 facing each other at a predetermined interval, and at least one of the partition plates 14 and 15 facing each other, in the figure, is positioned in the mold dividing portion, and the partition plate The bases are hinged to the mold dividing surfaces 20 and 22 with the partition plate hinges 11 so that they are sandwiched between the mold dividing surfaces, and the partition plates 14 and 15 are divided into separate molds 17, 19 and 21 for sandwiching the bases. The partition plates 14 and 15 are rotatably connected to each other by using 13 so that the partition plates 14 and 15 can be moved when the mold is 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. In the foaming mold shown in this figure, the split mold 21 is a fixed mold, and the other split molds 17, 19, 23 are movable molds.

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.

However, since the foaming mold has a partition plate hinge 11 different from the mold hinge 13 for connecting the split molds on the narrow mold partitioning surface, it can be used as a partition plate hinge.
There was a concern about the long-term durability of the partition plate hinge 11 and the foam molding die due to the size of 11.

The foaming mold is usually a partition plate.
A cavity surface 12a defined by 14 and 15 is provided in the movable lower mold split mold 19 from the viewpoint of easy setting of the different hardness members and taking out the different hardness bare headrest. Therefore, when opening the mold when setting 16 different hardness members, the partition plate 1
4 and 15 rotate together with the lower mold split mold 19 while being in contact with the mold split surfaces 20 and 22 of the lower mold by their own weight, and the tips of the partition plates 14 and 15 are inclined so that they approach each other. Therefore,
If it is attempted to arrange the different hardness member 16 on the cavity surface 12a partitioned by the partition plate as it is, the partition plate
14 and 15 tips interfere with the different hardness member 16 so that the cavity surface 12a
It was difficult to place it in, so I did the following. That is, the partition plates 14 and 15 are rotated with one hand in the direction of the arrow to keep the partition plates 14 and 15 apart from the mold split surfaces 20 and 22 of the lower mold split mold 19 and held in a state where the tip ends of the partition plates 14 and 15 are widened. The different hardness member 16 was placed on the partitioned cavity surface 12a by hand. But,
Setting the different hardness member on the cavity surface divided by the other hand while lifting the partition plate with one hand is not said to be excellent in workability, and the different hardness member is usually made of a soft foam slab or the like. It is difficult to correctly set the different hardness member on the cavity surface with one hand in a short time because it is configured and easily deformed such as twisting.

[0007]

SUMMARY OF THE INVENTION In view of the above points, therefore, the present invention allows a member of different hardness to be easily set on the cavity surface partitioned by the partition plate, and the durability of the mold itself is excellent. It is intended to provide a foaming mold for a headrest.

[0008]

In order to achieve the above-mentioned object, the present invention provides a movable partition plate for partitioning a part of a cavity surface on a mold split surface of a split mold, and the split partition plates are opposed to each other. In a foam molding die for a bare headrest of different hardness in which molds are rotatably connected by a hinge for a mold, the hinge pin for the partition plate is shared as the shaft pin for the hinge for the partition plate to divide the hinge for the partition plate into a mold dividing portion. And a stopper projection that restricts the rotation of the partition plate hinge when at least a part of one split mold is opened when the split mold is opened, protruding from the outer surface of the shaft pin insertion part of the partition plate hinge. Then, when the rotary mold of the split mold is opened, the movable partition plate is held apart from the mold split surface by the contact between the stopper projection and the split mold outer surface.

[0009]

In the foaming mold of the present invention, the partition pin hinge is attached to the mold dividing portion by sharing the shaft pin of the mold hinge connecting the split molds as the shaft pin of the partition plate hinge. Unlike a conventional die hinge, in which a partition plate hinge having a different axial pin is attached to a narrow die dividing surface, the size of the partition hinge is not severely restricted. Moreover, the shaft pin of the die hinge is strong enough to withstand the weight of the split die. Therefore, there is no fear that the shaft pin will be damaged by the movable partition plate that is extremely lighter than the split mold, and the durability of the foam molding mold will be high. In addition, the stopper protrusion that is provided on the outer surface of the shaft pin insertion portion of the partition plate hinge,
When the rotary mold of the split mold is opened, the rotation of the partition plate hinge is restricted by hitting one outer surface of the split mold, and the movable partition plate is held at a position apart from the mold split surface. Therefore, it is not necessary to lift the movable partition plate by hand when setting the different hardness member, and the different hardness member can be set on the cavity surface with both hands.

[0010]

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.
Is a perspective view of a part of the foaming mold, FIG. 3 is a perspective view showing a mold hinge and a partition plate hinge, and FIGS. 4 and 5 are sectional views showing the foaming mold when the mold is opened. The foam molding die 27 of this embodiment includes two upper dies 28, 30 and two lower dies 32,
It is composed of a total of four split molds of 34, and upper molds 28, 30 and lower molds 32, 34 are openably and closably connected by mold hinges 36, 38, 40. Have. The mold hinges 36, 38, 40 are two hinge bases 36a, 36b, 38a, 38b, 40a, which are fixed to the split molds, respectively.
40b and a shaft pin 37 that rotatably supports the hinge base,
It consists of 39 and 41. Note that 44a, 44b, 46a, 46
Reference numerals b, 48a, 48b, 50a and 50b are mold dividing surfaces. Further, a hole 52 for inserting an insert stay and a hole 54 for injecting a foaming raw material are formed in the mold dividing surfaces 44a, 44b of the upper mold.

On one of the lower molds 32, a pair of opposing movable partition plates 56, 58 are provided on the mold dividing surfaces 46a, 48a, and the movable partition plates 56, 58 are located at both ends of the movable partition plates 56, 58. A pair of opposed fixed partition plates 60 and 62, which are substantially orthogonal to 58, are erected on the cavity surface 64. Then, a part of the lower mold cavity surface 64 is partitioned by these partition plates, and a different hardness member 74 described later is sandwiched and held in the partitioned cavity surface 64a. The cavity surface 64a defined by the partition plate is usually a portion that forms the head receiving surface of the bare headrest with different hardness.

The movable partition plates 56, 58 are made of metal or hard resin, and are rotatably attached to the mold divisions by partition plate hinges 66, 68. Axial attachment by the partition plate hinges 66, 68 is an axial pin 37 of the mold hinges 36, 38 for connecting the upper mold 28, the lower mold 32, and the lower mold 34 that face each other with the movable partition plates 56, 58 interposed therebetween. 39 to 66
The shaft pin insertion portions 66b and 68b of the shafts a and 68a are inserted. That is, the axis pins 37 and 39 of the die hinge
The movable partition plates 56 and 58 are pivotally attached to the mold dividing portions by commonly using as a shaft pin of the partition plate hinges 66 and 68. In this embodiment, as shown in FIGS. 2 and 3, two mold hinges 36, 36, 38, 38 are arranged with a partition plate hinge base 66a, 68a interposed therebetween. The partition plate hinge bases 66 and 68 are axially attached by using one long shaft pin 37 and 39 which is inserted into the hinge, but of course the partition plate hinge is not limited to this embodiment. .

Further, stopper projections 70, 72 are provided on the outer surfaces of the shaft pin insertion portions 66b, 68b of the partition plate hinges 66, 68 so as to project upward. Protrusion 7 for that stopper
0 and 72 are the upper mold 28 and the lower mold 32 as shown in FIG. 4 and FIG.
When a predetermined amount has rotated, at least a part of the stopper protrusions 70, 72 hits the outer surfaces of the upper mold 28 and the lower mold 34 to restrict the rotation of the partition plate hinges 66, 68, and thereby the movable partition plate 56. , 58 are held apart from the mold dividing surfaces 46a, 48a. At the time when the stopper projections 70 and 72 restrict the rotation of the partition plate hinges 66 and 68, the mold dividing surface 46a
From the standpoint of workability, it is preferable that the angles between and 46b and 48a and 48b become 30 degrees. The stopper projection may be formed of a bolt or the like in addition to the plate-like body as in this example.

In the movable partition plate, depending on the mold structure, only one of the facing partition plates is pivotally attached by the partition plate hinge sharing the shaft of the mold hinge, and the other movable partition plate is The hinge may be attached by using another hinge having a different axial pin from that of the die hinge.
Also, only one of the facing partition plates is a movable partition plate,
Others may be fixed partition plates. Meanwhile, fixed partition plate 60,
62 is preferably provided so as not to form an undercut in the cavity in order to make it easier to remove 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 and 30 and the lower mold 32 are rotated to open the foam molding die 27. In the initial stage of the mold opening (state shown in FIG. 4), the movable partition plates 56 and 58 rotate together with the lower mold 32 while being in contact with the mold dividing surfaces 46a and 48a of the lower mold 32 by their own weight. And upper mold 28 and lower mold
When 32 further rotates with respect to the other split molds, the tips of the stopper projections 70, 72 hit the outer surfaces of the upper mold 28 and the lower mold 34 to restrict the rotation of the movable partition plates 56, 58, and then the upper mold 28. By the rotation of the lower mold 32 and the lower mold 32, the movable partition plate 5
6 and 58 are separated from the mold dividing surfaces 46a and 48a of the lower mold 32 and are held in that state. Next, a different hardness member 74 (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, the foaming mold is closed, and the different hardness member 74 is sandwiched by the movable partition plates 56, 58 and the fixed partition plates 60, 62 to be held in the cavity surface 64a partitioned by these partition plates, and mainly for reinforcement. The insert 76 (shown by the chain double-dashed line in FIG. 1) including the embedded portion and the attachment stay is held in the cavity 42 in the space by using the stay insertion hole 52 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 74, 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 74 and the insert 76 are integrated with the pillow. The part is foam-molded, then the foam-molding die 27 is opened and the bare headrest with different hardness is taken out.

In the above-mentioned embodiment, the foam molding die in which the insert is held in the cavity and the insert is embedded in the pillow at the same time as the foam molding of the pillow is described, but the present invention is not limited thereto. Alternatively, a foam molding die in which the insert is inserted into the pillow portion after foam molding may be used. In this case, in the foaming mold, instead of the insert, a protruding mold having substantially the same shape as the insert is provided toward the inside of the cavity. Then, the protrusion inserts the insert into the insert-insertion hollow portion formed in the pillow head portion of the different hardness bare headrest.

[0017]

EFFECTS OF THE INVENTION In the foam molding die for a bare headrest with different hardness according to the present invention, the shaft pin having high strength, which constitutes the mold hinge for connecting the split molds as described above, is also used as the shaft pin of the partition plate hinge. Therefore, the durability of the foaming mold is high. Also, since the movable partition plate is automatically held away from the mold split surface by the rotation of the split mold when the mold is opened, work can be done while lifting the movable partition plate with one hand when setting the different hardness member on the cavity surface. Since it is not necessary to perform it, the different hardness member can be set on the cavity surface with both hands, which makes the work extremely simple.

[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 perspective view showing a mold hinge and a partition plate hinge of the foaming mold shown in FIG.

FIG. 4 is a cross-sectional view showing the initial stage of the foam molding die shown in FIG. 1 during mold opening.

5 is a cross-sectional view showing the foaming mold shown in FIG. 1 after opening the mold.

FIG. 6 is a sectional view of a bare headrest with different hardness.

FIG. 7 is a cross-sectional view showing a conventional foaming mold.

[Explanation of symbols]

28: Upper mold (split type) 30: Upper mold (split type) 32: Lower mold (split type) 34: Lower mold (split type) 36: Mold hinge 38: Mold hinge 37: Mold hinge shaft pin 39: Mold hinge shaft pin 46a: Mold dividing surface 46b: Mold dividing surface 48a: Mold dividing surface 48b: Mold dividing surface 56: Movable partition plate 58: Movable partition plate 66: Partition plate hinge 68: Partition plate hinge 66a: Hinge stand for partition plate 68a: Hinge stand for partition plate 66b: Shaft pin insertion part of hinge plate for partition plate 68b: Shaft pin insertion part of hinge plate for partition plate 70: Protrusion for stopper 72: Protrusion for stopper

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Claims (1)

(57) [Scope of utility model registration request] 1. A different hardness in which a movable partition plate for partitioning a part of a cavity surface is provided on a mold split surface of a split mold, and the split molds opposed to each other with the partition plate sandwiched therebetween are rotatably connected by a mold hinge. In a foam molding die for a bare headrest, the hinge pin for a mold is shared by the shaft pin of the hinge for the mold as the shaft pin of the hinge for the partition plate, and at the same time when the rotary mold of the split mold is opened, At least a part of the split die outer surface hits a stopper projection that restricts the rotation of the partition plate hinge.The stopper projection is provided on the outer surface of the partition pin hinge shaft pin insertion portion, and the stopper projection when the split die is opened. A foam molding die for a bare headrest of different hardness, characterized in that the movable partition plate is held apart from the die split surface by hitting the outer surface of the split die.