JPH045288Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pad molding device, and more particularly to a device for integrally molding a skin and a core material into a foamed pad.

[Conventional technology]

FIG. 4 is a longitudinal sectional view of a portion of an automobile instrument panel.

In FIG. 4, 1 is a core material, 2 is urethane as a foam pad, and 3 is an outer skin. The instrument panel 4 is made by integrally molding these components.

FIG. 5 is a longitudinal sectional view of a conventional pad molding apparatus for molding the instrument panel 4 (hereinafter referred to as pad 4) shown in FIG.

In order to mold the pad 4 as shown in FIG. 4 using the apparatus shown in FIG. 5, first of all, as shown in FIG. The core material 1 is attached, and then a mixed liquid 13 of two types of liquids is injected onto the outer skin 3 of the lower mold 11. This liquid mixture foams to form urethane about 1 minute after mixing. Therefore, after the mixed liquid 13 is injected, the lower mold 11 and the upper mold 12 are quickly closed. Then, after a certain amount of time has elapsed, the mold is opened and removed, and a pad 4 as shown in FIG. 4 is completed.

In the conventional pad forming apparatus shown in FIG. 5, cavities 14 were sometimes formed in the urethane 2, as shown in FIG. This is due to the following reason.

That is, FIG. 7 is a longitudinal sectional view of a portion of the upper mold 12 and lower mold 11 shown in FIG. 5 when the molds are clamped.

In Fig. 7, 1 is a core material, 2 is urethane, and 3 is a core material.
is the epidermis. Regarding the upper mold 12 and the lower mold 11 as shown in FIG. When this is done, there is a gap 16 between the lower die 11 and the upper die 12.
Therefore, the mixed liquid 13 escapes from this interval 16 as shown by arrow A, and the amount of urethane 2 that escapes is
As a result, a cavity 14 (see FIG. 6) is formed.

Note that the urethane 2 that escapes into the space 16 between the lower die 11 and the upper die 12 becomes a burr 19, and this burr 19 will be scraped off later.

[Problem that the invention attempts to solve]

If the cavity 14 remains as shown in Figure 6, it cannot be used as a product, so in the case of Figure 6, a worker manually injects silicone or the like into the cavity 14 after removing the mold to repair it. Ta. For this reason, the repair work was time-consuming. In addition, it is necessary to check by touch whether the cavity 14 has been formed in the first place, which is time-consuming. Furthermore, burr 1 in Figure 7
9 had to be removed, which required extra effort. Further, since the burr 19 in FIG. 7 was discarded, the urethane was wasted accordingly. These are the problems of the conventional technology.

The present invention solves these problems of the conventional technology.

The technical problem of this invention is to reduce the manufacturing cost of the product by eliminating silicon injection work and deburring work by preventing the formation of cavities.
Another purpose is to reduce the cost of urethane raw materials by the amount of burrs.

In addition, as described in FIG. 7, the cavity 14
The reason why is possible is because there is an interval of 16, so
As shown in FIG. 8, if the upper mold 12 and the lower mold 11 are brought into contact with each other to eliminate the gap 16, no cavity 14 will be formed. However, in this case, when the mold is clamped, the upper mold 12 is used to remove the skin 3 on the surface of the lower mold 11.
9, wrinkles 18 are formed in the epidermis 3, as shown in FIG. Therefore, such a method is not suitable for practical use.

[Means for solving problems]

According to the present invention, the above-mentioned technical problem is achieved by the following means.

That is, the pad molding device according to the present invention consists of a lower mold with a skin laid on its surface and an upper mold with a core material attached, and the mixture is injected onto the skin and the mold is clamped. It is designed to mold pads. The lower mold and the upper mold have substantially vertical walls that face each other with a gap between them, and the lower mold has a substantially vertical wall that protrudes in a substantially horizontal direction from the substantially vertical wall toward the substantially vertical wall of the upper mold. A sealing member that lifts the skin and reduces the gap between the skin and the core material to zero when the mold is clamped is housed.

[Effect]

To mold a pad using the pad molding apparatus of the present invention, first of all, a skin is laid on the surface of the lower mold, and a core material is attached to the surface of the upper mold. Next, the mixture is injected onto the epidermis of the lower mold. After injecting the liquid mixture, quickly close the lower and upper molds.

After the lower mold and upper mold are closed, the sealing member is made to protrude to eliminate the gap between the skin and the core material. This will prevent the mixed liquid from escaping, so the sixth step
A cavity 14 as shown in the figure will no longer be formed.

After a certain amount of time has elapsed, the mold is opened and removed, resulting in a pad without any cavities.

〔Example〕

FIG. 1 is an enlarged vertical sectional view of a portion of a pad forming apparatus according to an embodiment of the present invention.

In FIG. 1, 11 is a lower mold, and 12 is an upper mold. A skin 3 is laid on the surface of the lower mold 11,
The core material 1 is attached to the upper mold 12.

As can be seen from FIG. 1, the lower die 11 has a projection 2.
1 is provided, and the epidermis 3 is prevented from slipping by the projections 21.

The lower mold 11 and upper mold 12 of this embodiment also have vertical wall surfaces 22 and 23. Further, a gap 16 is provided between the vertical wall surfaces 22 and 23.

Inside the lower mold 11, from the wall surface 22 to the upper mold 12.
A sealing member 29 is housed which discharges water in the horizontal direction, that is, in the direction of arrow P, or moves in the direction of arrow Q and returns to its original position.

FIG. 2 is a top view of the lower die shown in FIG.

In FIG. 2, 11 is the lower mold. As can be seen from FIG. 2, the sealing member 29 has an elongated plate shape. The seal member 29 is connected to an air cylinder 25 via a rod 24, and is movable by the air cylinder 25 in the directions of arrows P and Q.

31 and 32 are air pipes for supplying air to the air cylinder 25 and removing air from the air cylinder 25. Compressed air is supplied from the air pipe 31 to the air cylinder 25 and the air pipe 32
When the air is released from the air cylinder 25, the seal member 29 moves in the direction of arrow P. air pipe 32
When compressed air is supplied to the air cylinder 25 from the air pipe 31 and the air from the air cylinder 25 is released from the air pipe 31, the seal member 29 moves in the direction of the arrow Q.

When the seal member 29 moves in the direction of arrow P, the seal member 29 is discharged from the wall surface 22 of the lower die 11.

The operation of this embodiment will be explained.

To mold the pad 4 as shown in FIG. 4, first of all, as shown in FIG. I'll keep it. Next, a mixture 13 of two types of liquids is injected onto the skin 3 of the lower mold 11. After the mixed liquid 13 is injected, the lower mold 11 and the upper mold 12 are quickly closed.

After the lower mold 11 and the upper mold 12 are closed, compressed air is supplied from the air pipe 31 to the air cylinder 25, and air from the air cylinder 25 is removed from the air pipe 32. Then, as shown in FIG. 3 (FIG. 3 is an explanatory diagram of the operation of the pad forming apparatus shown in FIG. 1), the sealing member 29 moves in the direction of arrow P to lift the skin 3. In addition, the gap 16 between the skin 3 and the core material 1 is eliminated. Therefore, the mixed liquid 13 will not escape, and the formation of a cavity 14 as shown in FIG. 6 will no longer occur.

After a certain amount of time has passed, the air in the air cylinder 25 is removed from the air pipe 31 and the air pipe 3 is removed.
2 supplies compressed air to the air cylinder 25 to move the sealing member 29 in the direction of arrow Q, and when the mold is opened and removed, a pad 4 as shown in FIG. 4 is formed.
is completed.

[Effects of the invention] According to the invention, since no cavities are created, silicon injection work and deburring work are eliminated.Therefore, the manufacturing cost of the product is reduced, and the cost of urethane raw materials is reduced by the amount of burrs. This has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 1 is an enlarged longitudinal sectional view of a part of a pad forming apparatus according to an embodiment of the present invention, and FIG.
FIG. 3 is an explanatory diagram of the operation of the pad forming apparatus shown in FIG. 1, FIG. 4 is a longitudinal sectional view of an automobile instrument panel (pad), and FIG.
The figure shows an overall view of a conventional pad forming device, FIG. 6 is a vertical cross-sectional view of an automobile instrument panel (pad) with a cavity, and FIG. 7 shows a part of a conventional pad forming device. Enlarged longitudinal section, No. 8
This figure is an enlarged vertical cross-sectional view of a portion of another conventional pad forming apparatus, and FIG. 9 is an explanatory view of the operation of the pad forming apparatus shown in FIG. 8. 1... Core material, 3... Outer skin, 11... Lower mold, 12
... Upper mold, 13 ... Mixed liquid, 16 ... Spacing, 22
...Substantially vertical wall, 23...Substantially vertical wall, 29...
Seal member.

Claims (1)

[Scope of utility model registration request] This is a pad molding device that consists of a lower mold with a skin laid on the surface and an upper mold with a core material attached, and a mixed liquid is injected onto the skin and the mold is clamped to form the pad. The lower mold and the upper mold have substantially vertical walls that face each other with an interval, and the lower mold has a substantially vertical wall that extends from the substantially vertical wall to the substantially vertical wall of the upper mold. What is claimed is: 1. A pad molding device, comprising a sealing member that protrudes in a substantially horizontal direction and lifts the skin and can reduce the gap between the skin and the core material to zero when the mold is clamped.