JPH01159213A - Manufacture of foamed molded product to which surface slide zipper is stuck unitarily - Google Patents

Abstract

PURPOSE:To fix reliably a surface slide zipper to a cavity surface by making removal of a plastic film easy, by a method wherein a predetermined recessed part and jetty are formed on the cavity surface, the surface slide zipper is mounted so that an external fringe of the surface slide zipper is stuck to an inner wall of the jetty and liquid foamed stocks are cast. CONSTITUTION:A molded 30 possesses a cavity 36 of a desired form, forms a jetty 38 surrounding an external fringe of a surface slide zipper 34 on a predetermined part of a cavity surface 32 on which a surface slide zipper 34 is mounted and recesses 42 holding hooks 40 of the surface slide zipper on the cavity surface surrounded by the jetty 38. The surface slide zipper 34 is fixed reliably and strongly within the jetty 38 of the cavity surface 32 through adhesion between an external fringe of the surface slide zipper and an inner wall of the jetty and surrounding of the external fringe of the surface slide zipper with the jetty 38. Liquid foamed plastic stocks 22 cast within a mold cavity 36 filled into the cavity 36 through foaming and the surface slide zipper is stuck close to a regular position in the surface of a foamed molded product.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method of manufacturing a foamed molded product in which a hook-and-loop fastener is fixed together.

(Prior Art) For example, an automobile seat or the like has a structure in which a cushion body is covered with a skin material, and the seat surface is often made into a concave shape in order to maintain a sitting posture or to decorate the seat.

In such a seat, hook-and-loop fasteners 2, 4, 6, and 8 are fixed to the recessed portion 1, as shown in FIG. The foamed molded product 9 is used as a cushion body, and the back surface of the skin material is engaged with the hook-and-loop fastener to prevent the skin material from lifting up.

Conventionally, as a simple method for producing a foamed molded product to which a hook-and-loop fastener is fixed as described above, as shown in FIG. The hook-and-loop fastener 18 is connected to the engaging element 16ff! J is placed so as to be in contact with a predetermined mold cavity surface, and the liquid foamed plastic raw material 22 is injected into the cavity 10 to form a foam, and a hook and loop fastener is fixed integrally on the surface of the foam. There is a method for manufacturing foam molded products.

However, in the above method, the liquid foamed plastic raw material 22 injected into the cavity 10 enters between the cavity surface 20 and the base material 14 of the hook-and-loop fastener due to its injection pressure or foaming pressure, and adheres to the engager 16 of the hook-and-loop fastener. In this case, the hardened foamed plastic has the disadvantage that the engagement function of the hook-and-loop fastener 18 is impaired.

Furthermore, the hook-and-loop fastener placed on the cavity surface tends to be misaligned during injection or foaming of the liquid foamed plastic raw material 22, and as a result, the hook-and-loop fastener 18 cannot be properly fixed at a predetermined position on the surface of the foam molded product. is often the case. As a result, when the skin material is placed over the foamed molded product, the hook-and-loop fastener on the back side of the skin material cannot be properly engaged with the hook-and-loop fastener on the surface of the foamed molded product, which may cause the skin material to be twisted or wrinkled.

Therefore, in order to eliminate the above-mentioned problems, the conventional method shown in FIG. 5 has been taken. First, for the former, the engaging element 16 of the hook-and-loop fastener 18 is covered in advance with a plastic film 24, and the plastic film 24 is removed from the hook-and-loop fastener 18 after foam molding, thereby allowing injection of the liquid foamed plastic raw material and This is intended to prevent the raw material from adhering to the engaging element 16 during foaming. For the latter, a magnetic material 26 such as an iron plate is buried in the base material 14 of the hook-and-loop fastener 18, while the cavity surface 20
A magnet 28 is embedded in the hook-and-loop fastener mounting portion, and the hook-and-loop fastener is
18 is suctioned and fixed to the cavity surface 20 to prevent the hook-and-loop fastener 18 from shifting from a predetermined position.

(Problems to be Solved by the Invention) However, the above method has the following problems. The first problem is that it takes time to remove the plastic film 24, and the second problem is that the distance between the magnetic body 26 and the magnet 28 is large, so the magnetic attraction force acting between them is weak, and the hook-and-loop fastener The third problem is that the plastic film 24 cannot be securely fixed to the cavity surface.The third problem is that the material cost of the plastic film and the cost of removing the plastic film are added to the product price due to the use of the plastic film 24, which increases the product price.

Therefore, the present invention attempts to solve the above problems.

(Means for Solving the Problems) The gist of the present invention is to place a hook-and-loop fastener having an engager on at least one side in a mold having a desired cavity so that the engager side faces a predetermined mold cavity surface. In this method of manufacturing a foam molded product, a foam is molded by injecting a liquid foamed plastic raw material into the cavity, and a hook and loop fastener is integrally fixed to the surface of the foam. A jetty that surrounds the four parts that accommodate the hook-and-loop fastener's engager and the outer periphery of the hook-and-loop fastener is formed on the cavity surface where the hook-and-loop fastener is placed, and the hook-and-loop fastener is placed on the cavity surface surrounded by the jetties. A method of manufacturing a foamed molded product in which a hook-and-loop fastener is integrally fixed, characterized by placing the foamed plastic material in close contact with an inner wall and injecting a liquid foamed plastic material into a mold cavity.

(Function) Prior to injecting the liquid foamed plastic raw material, the hook-and-loop fastener is placed within the jetty of the cavity surface with the engager side facing the cavity surface.

The outer peripheral edge of the hook-and-loop fastener placed within the jetty is surrounded by the jetty, and is in close contact with the inner wall of the jetty. Therefore, the hook-and-loop fastener is
The jetty that surrounds its outer periphery prevents free movement and is securely fixed within the jetty, so it does not move on the cavity surface even with the injection pressure and foaming pressure of the liquid foam plastic raw material, and the jetty on the cavity surface is always fixed. It will be fixed inside. As a result, by subsequent injection of the liquid foaming raw material and foaming, it becomes possible to obtain a foamed molded product with the hook-and-loop fastener fixed at a predetermined position on the surface.

In addition, since the outer periphery of the hook-and-loop fastener is tightly sealed against the jetty on the cavity surface, the liquid foamed plastic raw material that is subsequently injected into the cavity cannot enter between the cavity surface inside the jetty and the hook-and-loop fastener. It foams without adhering to the fastener engagement element, resulting in a foamed molded product with a hook-and-loop fastener integrally fixed to its surface. As a result, the engaging element of the hook-and-loop fastener fixed to the surface of the foamed molded product is free of foamed plastic and the engagement function of the hook-and-loop fastener is not impaired.

(Examples) The present invention will be described below based on examples shown in the figures.

FIG. 1 is a sectional view of a main part of a mold 30 during the production of a foam molded product to which a hook-and-loop fastener is integrally fixed according to the present invention, and FIG.
The figure is a perspective view showing the main part of the mold 30 with a portion cut away.

First, the mold 30 and the surface fastener 34 placed on the mold cavity surface 32 will be explained.

The mold 30 has a cavity 36 of a desired shape,
A jetty 38 surrounding the outer periphery of the hook-and-loop fastener 34 is formed at a predetermined portion of the cavity surface 32 on which the hook-and-loop fastener 34 is placed, and the cavity surface surrounded by the jetty 38 has four parts that accommodate the hook-and-loop fastener's engager 40. 42 is formed. The height of the jetty 38 is preferably such that the upper end thereof is substantially parallel to the back surface of the hook-and-loop fastener 38, and the appropriate thickness of the jetty is 2 to 5!1111.

The one-sided fastener 34 has a rod-shaped or loop-shaped retainer 40 with an enlarged tip on at least one side of a base material 44 that is the same size as or slightly larger than the mold cavity surface surrounded by the inner wall 39 of the jetty 38. It is.

Moreover, the loop-shaped fibers 46 on the surface opposite to the engager surface are
This is for firmly fixing the base material 44 of the hook-and-loop fastener to the surface of the foam molded product.

Note that there is a magnetic material (such as an iron plate) inside the base material 44 of the hook-and-loop fastener.
) is buried in the recess 42 on the mold cavity surface.
A magnet (not shown) may be embedded in the structure so that a magnetic attraction force acts between the magnetic body and the magnet.

Next, an example of manufacturing a foam molded article of the present invention using the mold 30 and surface fastener 34 will be described.

The square fastener 34 is placed in the cavity surface of the portion surrounded by the jetty 38 with the engager 40 facing the mold cavity surface 32 so that the engager 40 is accommodated in the recess 42 of the mold cavity surface 36. Place it on. At this time, since the size of the base material 44 of the hook and loop fastener is the same as or slightly larger than the cavity surface of the portion surrounded by the jetty inner wall 39,
The outer peripheral edge 35 of the hook-and-loop fastener comes into close contact with the inner wall 39 of the jetty and is sealed by the chain portion. The hook-and-loop fastener 34 is reliably and firmly fixed within the jetty 38 of the cavity surface 32 by the close contact between the outer peripheral edge of the hook-and-loop fastener and the inner wall of the jetty, and by the surrounding of the outer circumferential edge of the hook-and-loop fastener 34 by the jetty 38.

Note that when a magnetic material is embedded in the base material 44 of the hook-and-loop fastener and magnets are embedded in the four parts 42 of the mold cavity surface as described above, the hook-and-loop fastener 34 is It will be more firmly fixed within the jetty 38 of the mold cavity surface 32.

Thereafter, a liquid foamed plastic raw material 22 such as a polyurethane foam raw material is injected into the cavity 36, and the mold 30 is closed. Depending on the mold structure, the liquid foamed plastic raw material may be injected into the cavity through an injection port provided in a part of the mold after the mold is closed.

The liquid foamed plastic raw material 22 injected into the mold cavity 36 foams and fills the cavity 36 to become a cavity-shaped foam, and also forms the base material 4 of the hook-and-loop fastener.
4 to form a foamed molded product with the hook-and-loop fastener 34 integrally fixed to the surface. At that time, the surface fastener 34 is
8, the hook-and-loop fastener 34 does not move on the cavity surface even with the injection pressure and foaming pressure of the liquid foamed plastic raw material. The hook-and-loop fastener is fixed in place. Moreover, since the outer peripheral edge of the hook-and-loop fastener that is not placed on the cavity surface is sealed by the jetty 38, the liquid foamed plastic raw material does not enter between the cavity surface and the hook-and-loop fastener and adhere to the engaging element 4o. The engagement function of the fastener 34 is not impaired.

(Effects of the Invention) According to the present invention, it is possible to produce a foamed molded product having the above-described structure and having a hook-and-loop fastener fixed at a proper position on the surface without impairing the engagement function of the hook-and-loop fastener.

Moreover, there is no need to cover the hook-and-loop fastener's engager with a plastic film as in the past, and furthermore, there is no need to embed magnetic materials or magnets in the base material and cavity surface of the hook-and-loop fastener, making the work easier. Simplification and lower product prices can be achieved.

Additionally, when a magnetic material such as a steel plate is buried in the base material of a hook-and-loop fastener, the magnetic material will be located on the surface of the foam molded product, so the surface of the foam molded product will become locally hard due to the rigidity of the magnetic material. However, according to the present invention, since a magnetic material is not necessarily required, the problem of sagging can also be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a mold when the present invention is practiced, and FIG. 2 is a partially cutaway view of the main part of the mold shown in FIG. FIG. 3 is a perspective view of a foam molded product having a recessed shape, and FIGS. 4 and 5 are sectional views of essential parts of a mold and the like during production of a foam molded product according to the prior art. 32: Cavity surface, 34: Surface fastener, 36: Cavity, 38: Jetty, 42: Recess Patent applicant Inoue MCV Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A hook-and-loop fastener having an engager on at least one side is placed in a mold having a desired cavity so that the engager side faces a predetermined mold cavity surface, and a liquid foamed plastic raw material is injected into the cavity. In a method of manufacturing a foam molded product in which a foam is molded and a hook and loop fastener is integrally fixed to the surface of the foam, a recess for storing an engager of the hook and loop fastener is provided in a cavity surface on which the hook and loop fastener is placed in advance; A jetty surrounding the outer peripheral edge of the hook-and-loop fastener is formed, and the hook-and-loop fastener is placed on the cavity surface surrounded by the jetty so that its outer peripheral edge is in close contact with the inner wall of the jetty, and the liquid foam plastic raw material is poured into the cavity. A method for manufacturing a foam molded product that integrally fixes a hook-and-loop fastener, characterized by injecting it into a mold cavity.