JPH0691662A - Surface fastener integral foamed molded form and its manufacture - Google Patents

Abstract

PURPOSE:To improve an adhesive strength of a surface fastener to a foamed molded form. CONSTITUTION:A flexible maternal 12 integrated with surface fasteners 10 is set in a recess 22 of a mold 20, and an inner protrusion end 24A of an undercut part 24 is intruded into a side face 12A of the material 12. Then, liquid foamed plastic material 28 is transferred to the mold 20 and foamed in the mold 20. Thus, it can prevent the material 28 from being adhered to an engaging surface 10B of the fastener 10, and the face 12A and a rear surface 12C except a surface 12B of the material 12 coupled with the fastener 10 can be impregnated with the material 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a foam fastener-integral foam-molded article having a hook-and-loop fastener integrally fixed thereto, and a surface fastener-integral foam-molded article.

[0002]

2. Description of the Related Art Conventionally, automobile seats and the like have a structure in which a cushioning body is covered with a skin material, but the seating surface is often formed in a recessed shape in order to maintain the seated posture of an occupant or for decoration. In such a seat, in order to prevent the skin material from being lifted up from the cushion body in the depressed shape portion, for example, as shown in FIG. 9, the surface fastener 72 is fixed to the depressed shape portion 70A of the seat back 70. The foam molded product 73 is used as a cushion body, and the surface fastener 75 is attached to the surface fastener 72.
The outer surface of the skin material 75 is prevented from rising by engaging the back surface of the skin material.

An example of a method of manufacturing the foam-molded article 73 to which the hook-and-loop fastener 72 is fixed is disclosed in JP-A-1-159213.

As shown in FIG. 10, in this method of manufacturing a foam fastener-integral foamed product, a surface fastener 72 having an engagement surface 72A having an engagement element 75 on at least one side is provided in a mold 70 having a cavity. Then, the engaging surface 72A is placed so as to be in contact with a predetermined mold cavity surface 70A, and then a liquid foamed plastic raw material 76 is injected into the mold to manufacture a foamed molded product, and the foam molding thereof. The surface fastener is integrally fixed to the surface of the product.

On the cavity surface 70A on which the hook-and-loop fastener 72 is mounted, there is formed a jetty 78 that surrounds the outer peripheral edge 72B of the hook-and-loop fastener 72. By mounting the fastener 72 so that the outer peripheral edge 72B thereof is in close contact with the inner wall 78A of the jetty 78, the liquid foamed plastic raw material 76 is prevented from adhering to the engaging surface 72A of the surface fastener 72.

[0006]

However, in the method of manufacturing the surface fastener-integral foam-molded article, as shown in FIG.
As shown in FIG. 7, the adhesive surface between the surface fastener 72 and the foam-molded product 73 is only the back surface 72C of the surface fastener 72, and thus the adhesive force tends to be insufficient.

In consideration of the above facts, the present invention has an object to obtain a method for manufacturing a foam fastener-integral foam molded article and a surface fastener-integral foam molded article capable of improving the adhesive force between the surface fastener and the foam molded article. is there.

[0008]

According to a first aspect of the present invention, there is provided a method of manufacturing a foam fastener-integral foam-molded article, wherein a soft material capable of being impregnated with a liquid foaming raw material is adhered to a back surface of the surface fastener to form a concave portion of a mold. Is surrounded by a sidewall having an undercut portion, the depth of the recess is deeper than the thickness of the surface fastener and shallower than the combined thickness of the surface fastener and the soft material, and at the inner protruding end of the undercut portion. The soft material is made larger than the determined size, the soft material is fitted into the recess so that the surface fastener is inside the recess, and a liquid foaming raw material is injected into the mold, and foamed in the mold to form a surface. It is characterized by manufacturing fastener-integral foam moldings.

According to the second aspect of the present invention, the surface fastener-integrated foam-molded article is formed by adhering a soft material capable of being impregnated with a liquid foaming raw material to the back surface of the surface fastener, and forming a concave portion of the mold with a side wall having an undercut portion. The depth of the recess is deeper than the thickness of the surface fastener and shallower than the combined thickness of the surface fastener and the soft material, and the soft material is larger than the size determined by the inner protruding end of the undercut portion. And the soft material is fitted into the recess so that the surface fastener is inside the recess, and a liquid foaming raw material is injected into the mold, and foamed in the mold.

[0010]

According to the method of manufacturing a foam fastener-integral foam-molded article of the present invention, the liquid foaming raw material is impregnated into the outer peripheral portion of the soft material bonded to the back surface of the hook and loop other than the bonding surface of the hook and loop fastener. As a result, the hook-and-loop fastener and the foam molded article are bonded together. Therefore, the soft material is firmly bonded to the foamed molded product because it bonds not only to the back surface but also to the side surface. Therefore, if the surface fastener is firmly integrated with the soft material, the adhesive force between the surface fastener and the foam molded article can be improved.

Further, in the surface fastener integrated foam-molded product according to the second aspect of the invention, the liquid foaming raw material is impregnated into the outer peripheral portion other than the bonding surface of the surface fastener of the soft material bonded to the back surface of the surface fastener. The hook-and-loop fastener and the foamed molded product are bonded together by this. Therefore, the soft material is firmly bonded to the foamed molded product because it bonds not only to the back surface but also to the side surface. Therefore, if the surface fastener is firmly integrated with the soft material, the adhesive force between the surface fastener and the foam molded article can be improved.

[0012]

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

As shown in FIG. 2, a soft material 12 is firmly integrated on the back surface 10A of the surface fastener 10 by welding, engagement or the like, and the soft material 12 has good shape followability. , A non-woven fabric that can be impregnated with a liquid foamed plastic raw material, a soft urethane foam, or the like.

As shown in FIG. 1, the mold 20 is provided with a recess 2 for fixing a soft material 12 in which the surface fastener 10 is integrated.
2 is formed. The dimensional relationship between the recess 22 and the soft material 12 is such that the depth D of the recess 22 is the thickness L of the surface fastener 10.
It is deeper than the thickness K and is shallower than the total thickness K of the surface fastener 10 and the soft material 12.

As shown in FIG. 3, the concave portion 22 has a rectangular shape, and each of the four side walls of the concave portion 22 has an undercut portion 2 forming a negative angle with the horizontal plane 20A of the mold 20.
4 is formed by cutting, and as shown in FIG. 1, the size determined by the inner protruding end 24A of the undercut portion 24 of each side wall of the recess 22, that is, the opening 2 of the recess 22.
2A is narrower than the soft material 12, and the inside 22 of the recess 22
B is wider than the soft material 12.

Next, the method for manufacturing the surface fastener-integral foam-molded article of this embodiment will be described in detail. As shown in FIG.
The soft material 12 integrated with the surface fastener 10 is set in the recess 22 of the mold 20. As a result, the inner protruding end 24A of the undercut portion 24 bites into the side surface 12A of the soft material 12.

Next, the liquid foamed plastic raw material 28 is injected into the mold 20 and foamed in the mold 20. In this case, the inner protruding end 24A of the undercut portion 24 bites into the side surface 12A of the soft material 12 and seals the outer peripheral portion of the soft material 12, so that the liquid foamed plastic raw material 28 is applied to the engaging surface 10B of the surface fastener 10. It is possible to prevent the adhesion. Further, the liquid foamed plastic raw material 28 is impregnated into the side surface 12A and the back surface 12C of the soft material 12 excluding the front surface 12B to which the surface fastener 10 is bonded. After that, when the liquid foamed plastic raw material 28 is foamed and becomes a foam molded product, the surface fastener integrated foam molded product is taken out from the mold 20.

Therefore, as shown in FIG. 4, in the surface fastener-integrated foam-molded article 30 taken out from the mold, the liquid foamed plastic raw material is the side surface except the surface 12B of the soft material 12 to which the surface fastener 10 is bonded. 12A and the back surface 12C are impregnated to form an impregnated layer 32. Therefore, the soft material 12 is firmly bonded not only to the foamed molded product 30 and the back surface 12C but also to the side surface 12A, so that the surface fastener 10 is firmly integrated with the soft material 12.
The adhesive strength between the surface fastener 10 and the foamed molded product 30 can be improved.

Further, in this embodiment, the surface fastener 10 of the soft material 12 has the inner protruding end 24A of the undercut portion 24.
24A over the undercut portion 24
By digging into the side surface 12A of the soft material 12, the softness 12 in which the surface fastener 10 is integrated is set in the concave portion 22 of the mold 20, the moderation feeling is improved, and the setting failure can be prevented.

Further, in this embodiment, since the soft material 12 is used, the concave portion 22 of the die 20 is removed from the surface fastener 10.
22B can be widened, and twisting and bending of the surface fastener 10 that occurs during setting can be prevented.

In this embodiment, since the soft material 12 is used, it is not necessary to thicken the base portion of the hook-and-loop fastener 10. Therefore, the portion to which the hook-and-loop fastener 10 of the hook-and-loop fastener integral foam molded article 30 is fixed is different. It does not harden.

Further, in this embodiment, the undercut portion 2
In order to prevent the liquid foamed plastic raw material 28 from invading by causing the inner protruding end 24A of No. 4 to bite into the side surface 12A of the soft material 12, the dimensional accuracy of both the surface fastener 10 side and the mold 20 side should be lowered as compared with the conventional method. And productivity is improved.

Further, in this embodiment, since the thickness of the impregnated layer 32 can be controlled by changing the thickness and the density of the soft material 12, the foam fastener-integral foam-molded product so as not to impair the feel of the product surface. 30 surface fasteners 1
It is possible to adjust the hardness of the part where 0 is fixed.
The size of the undercut portion 24 may be adjusted according to the soft material 12.

As shown in FIG. 5, the surface fastener 1
For the purpose of making the engagement surface 10B of 0 and the general surface 30A of the foam molded article 30 flush with each other, the undercut portion 24 may be provided above the horizontal surface 20A of the mold 20, as shown in FIG.

Further, in order to further improve the moderation feeling when the soft material 12 having the surface fasteners 10 integrated therein is set in the concave portion 22 of the die 20, as shown in FIG. 7 (A).
At least one of the undercut portions 24 facing each other may be provided with a plurality of convex portions 36 at several places, and as shown in FIG. 7B, the surface fastener 10 may pass over the convex portions 36 to improve the moderation.

Further, as shown in FIG. 8 (A), the mold 2
Set the positioning pin 3 on the bottom surface 22C of the recess 22 of 0.
8 may be provided upright, and as shown in FIG. 8B, the head 38A of the set positioning pin 38 may be inserted into the hole 40 formed in the hook-and-loop fastener 10 to improve the moderation. .

[0027]

According to the first aspect of the present invention, there is provided a method of manufacturing a foam fastener-integrated foam molded article, wherein a soft material capable of being impregnated with a liquid foaming raw material is adhered to the back surface of the surface fastener to undercut the concave portion of the mold. Surrounded by a side wall that has a portion, the depth of the recess is deeper than the thickness of the surface fastener and shallower than the combined thickness of the surface fastener and the soft material, and the soft material is made larger than the size determined by the inner protruding end of the undercut portion. Then, insert the soft foam material into the recess so that the surface fastener is inside the recess, inject the liquid foaming raw material into the mold, and foam in the mold to produce the surface fastener integrated foam molded product. It has an excellent effect that the adhesive strength with a molded product can be improved.

The surface fastener integrated foam-molded article of the present invention according to claim 2 has a soft material capable of being impregnated with a liquid foaming raw material adhered to the back surface of the surface fastener, and has an undercut portion in the concave portion of the mold. Surrounded by a side wall, the depth of the recess is deeper than the thickness of the surface fastener and shallower than the combined thickness of the surface fastener and the soft material, and the soft material is made larger than the size determined by the inner protruding end of the undercut portion to make it soft. It is manufactured by inserting the material into the recess so that the surface fastener is inside the recess, injecting the liquid foaming raw material into the mold, and foaming in the mold, thus improving the adhesive strength between the surface fastener and the foam molded product. It has an excellent effect that

[Brief description of drawings]

FIG. 1 is a side sectional view showing a method for manufacturing a foam fastener-integral foam-molded article according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a hook-and-loop fastener and a soft material used in a method for manufacturing a foam-and- fastener integrated foam-molded product according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a mold used in a method for manufacturing a surface fastener-integral foam-molded article according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a surface fastener-integrated foam molded product manufactured by the method for manufacturing a surface fastener-integrated foam molded product according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of another surface fastener-integrated foam molded product manufactured by the method for manufacturing a surface fastener-integrated foam molded product according to an embodiment of the present invention.

FIG. 6 is a side sectional view showing a method for manufacturing the surface fastener-integral foam-molded article of FIG.

FIG. 7 (A) is a perspective view showing another mold used in the method for manufacturing the surface fastener-integral foam-molded article of the embodiment of the present invention, and FIG. 7 (B) uses the mold of (A). FIG. 6 is a side cross-sectional view showing a method for manufacturing the foam fastener-integrated foam molded product.

FIG. 8 (A) is a perspective view showing another mold used in the method for manufacturing the surface fastener-integral foam-molded article of the embodiment of the present invention, and FIG. 8 (B) uses the mold of (A). FIG. 6 is a side cross-sectional view showing a method for manufacturing the foam fastener-integrated foam molded product.

FIG. 9 is a perspective view showing a seat back made of a foam fastener-integral foam-molded product.

FIG. 10 is a side sectional view showing a method of manufacturing a surface fastener-integral foam-molded article of a conventional example.

FIG. 11 is a cross-sectional view of a surface fastener-integrated foam molded product manufactured by a conventional method for manufacturing a surface fastener-integral foam molded product.

[Explanation of symbols]

 10 surface fastener 10A back surface 10B engagement surface 12 soft material 12A side surface 12B surface 12C back surface 20 mold 22 recessed portion 24 undercut portion 24A inner protruding end 28 liquid foamed plastic raw material 30 surface fastener integrated foam molded product 32 impregnated layer

Claims (2)

[Claims] 1. A soft material capable of being impregnated with a liquid foaming raw material is adhered to the back surface of the hook-and-loop fastener, and the concave portion of the mold is surrounded by a side wall having an undercut portion, and the depth of the concave portion is greater than the thickness of the hook-and-loop fastener. Deep and shallower than the combined thickness of the surface fastener and the soft material, the soft material is larger than the size determined by the inner protruding end of the undercut portion, the soft material in the recessed portion is the surface fastener A method for producing a surface fastener-integrated foam molded article, which comprises fitting a liquid foaming raw material into the inside of a recess and injecting the liquid foaming raw material into the mold to foam the surface fastener-integrated foam molded article. 2. A soft material capable of being impregnated with a liquid foaming raw material is adhered to the back surface of the hook-and-loop fastener, the recess of the mold is surrounded by a side wall having an undercut portion, and the depth of the recess is set to be larger than the thickness of the hook-and-loop fastener. Deep and shallower than the combined thickness of the surface fastener and the soft material, the soft material is larger than the size determined by the inner protruding end of the undercut portion, the soft material in the recessed portion is the surface fastener A surface fastener-integrated foam-molded article, which is manufactured by injecting a liquid foaming raw material into the mold so as to fit inside the recess and foaming in the mold.