JP3169260B2 - Method for manufacturing bag-shaped skin integral foam molded product - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a bag-like skin integral foam molded article.

[0002]

2. Description of the Related Art FIG. 5 shows an example of manufacturing a general skin-integrated foam molded product used for a headrest or an armrest of a vehicle. As shown, the foaming mold 51
Core member 7 made of an iron plate, a resin plate, or the like on the pressing die (upper die) 52
0 is attached by a magnet or bolts B, B, etc., while a skin material 60 is arranged in a cavity mold (lower mold) 53.

In order to arrange the skin material 60, the core material 70 to be installed is mounted on the mold surface of the stamping die 52, and the skin material 60 on the back side is expanded to open the skirt portion 61 as shown in the figure. , 61 are set on the mold surface.

A foamed resin material U such as urethane resin is introduced into the inside of the skin material 60 from an injection port (not shown), and is integrally foamed with the skin material 60 (including the skirt portion 61) and the core material 70. Is done. Symbol 5 in the figure
4 is a split mold, 55 is a hinge for opening and closing the press mold 52 and the split mold 54, 56 is a hinge for opening and closing the split mold 54 and the cavity mold 53, and 57 is a molded product cavity.

[0005] The molded product cavity 57 is provided with a projection 59 provided on the pressing die 52 when the die is closed.
The seal is made by abutting on the skirt portion 61 of the "0".
After the molded product is released from the mold, the end of the skirt portion 61 is cut off and bent toward the core material 70 to obtain a product.

However, in such a manufacturing method, the injected foamed resin material U leaks between the core material 70 and the pressing die 52, and the foaming pressure causes the core material 70 to move into the pressing die 5.
2 may be displaced by being separated from
There was a possibility that the precision of the molded product was poor.

Therefore, it is necessary to newly attach a cover for hiding the cover to the product, which not only requires troublesome work but also significantly deteriorates the appearance of the product.
Further, the leaked resin material U may adhere to the escape hole 58 of the screw for fixing the wall surface of the mold or the core material and may be hardened, and it is difficult to remove the resin material and the workability is significantly reduced.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above problems, and does not cause resin leakage or misalignment of the core material during molding, thereby improving work efficiency and productivity. An object of the present invention is to provide a method for producing a bag-shaped skin-integrated foam molded article, which can be greatly improved.

[0009]

That is, the present invention provides:
A core material having a mounting member protruded in a bag-shaped skin material is previously sealed so that a part of the mounting member protrudes outside the skin material, and a mold holding hanger is attached to the mounting member protruding outside the skin material. After suspending the bag-shaped skin material at a predetermined position of a molding die via the mold holding hanger and holding the same, a foam molding material is introduced into the bag-shaped skin material and integrated with the skin material and the core material. The present invention relates to a method for producing a bag-like skin-integral foam molded article, wherein the mold-holding hanger is removed after molding to obtain a bag-like skin foam-integrated molded article.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a headrest manufactured by one embodiment of the method of the present invention as viewed from a mounting surface side, and FIG. 2 is a cross-sectional view of a foaming mold showing an example of a method of manufacturing a bag-like skin-integrated foamed product of the present invention. FIG. 3 and FIG. 3 are cross-sectional views in which main parts are enlarged, and FIG. 4 is a perspective view showing an example of a mold holding hanger.

As shown in FIG. 1, a headrest H manufactured by the method of the present invention has a core member 20 having a mounting member 25 for mounting a product in a skin material 10 formed in a bag shape. 25 is inserted with a part thereof protruded. In the skin material 10, the core material 20 is provided on the back side (mounting surface) of the headrest H.
Only the slit 15 for insertion into the inside of the cylinder 0 and the injection port 19 for the foamed resin material are formed, and it has an extremely beautiful appearance without a cover or a seam.

FIG. 2 and FIG. 3 show an example of a method for producing a bag-like skin-integrated foam molded product of the present invention. In the figure, reference numeral 40 denotes a foaming mold, 41 denotes a cavity mold, and 42 denotes a pressing mold, which is formed by a hinge 43 so as to be freely opened and closed. Mold 4
The skin material 10 is arranged in the 0 cavity mold 41. The skin material 10 is formed of vinyl chloride or the like into a bag shape that defines a headrest shape by slash molding or the like, and a core material 20 is sealed in advance inside the bag material.

The core member 20 is provided with a plurality of mounting members 25 such as weld bolts for mounting a headrest molded product to a seat or the like.
A portion of the mounting member 25 (in this embodiment, a screw portion) is sealed in a state in which the outer surface of the skin material 10 is projected. A mold holding hanger 30 described below is attached to the attachment member 25 of the core member 20.

The mold holding hanger 30 is for holding the skin material 10 and the core material 20 in a predetermined position in the cavity of the mold 40 in a suspended state, as can be better understood from FIG. And a hanger main body 31 formed in a mold surface shape of a mold for holding a metal plate, a resin plate, or the like. The mounting member 25 of the core material 20 protruding from the skin material 10 is inserted into the mounting hole 33 of the hanger body 31,
It is fixed by a mounting nut 35.

The mold holding hanger 30 to which the skin material 10 and the core material 20 are attached is set in a hanger accommodating recess 45 formed in the cavity mold 41, and
And the core material 20 is suspended and held in the cavity. Further, it is preferable that the pressing die 42 is formed with a concave portion 44 for accommodating the mounting member 25 of the core member 20.

In this embodiment, the mounting member 25 of the core member 20 is connected to the mold holding hanger 3 via a collar 50.
It is attached to 0. Thereby, an appropriate space is provided between the skin material 10 and the core material 20, and the foamed resin material P to be injected is surely spread to the back surface side of the core material 20.

The foamed resin material U is supplied to the injection port 4 of the mold 40.
From 9, it is introduced into the bag-shaped skin material 10 via the mold holding hanger 30, and is integrally foamed with the skin material 10 and the core material 20. At this time, since the core member 20 is securely positioned and held at a predetermined position of the cavity mold 41 via the mold holding hanger 30, no displacement occurs due to the foaming pressure of the foamed resin material U. In order to prevent the foamed resin material from leaking out of the slit portion 15 at the time of molding, it is preferable to fix the slit portion 15 with a tape or the like. After removing the mold, the mold holding hanger 30 is removed from the product and collected.

[0018]

As shown and described above, according to the method for producing a bag-shaped skin-integrated foam molded product of the present invention, the core material can be reliably positioned at a predetermined position without causing resin leakage. it can. Therefore, the appearance of the resulting product is beautiful and has high dimensional accuracy and sufficient strength,
Has high commercial value. In addition, since the skin material is held in a bag shape, there is no need to attach a cover material or the like and to provide a skirt portion for sealing a molding die, thereby greatly simplifying a product manufacturing process and improving workability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a headrest manufactured according to an embodiment of the present invention as viewed from a mounting surface side.

FIG. 2 is a cross-sectional view of a foaming mold showing an example of a method for producing the bag-shaped skin-integrated foam molded article of the present invention.

FIG. 3 is an enlarged sectional view of a main part thereof.

FIG. 4 is a perspective view showing an example of a mold holding hanger.

FIG. 5 is a cross-sectional view of a foam mold showing a method for producing a general skin-integrated foam molded article.

[Explanation of symbols]

 Reference Signs List 10 skin material 20 core material 30 hanger for holding mold 25 mounting member 40 foaming mold U foaming resin material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 39/10 B29C 39/22-39/36 B29C 43/18 B29C 43/32-43/42 B29C 45 / 14 B29C 33/12-33/14

Claims (1)

(57) [Claims] 1. A core material having a mounting member protruding from a bag-shaped skin material is sealed in advance so that a part of the mounting member protrudes outside the skin material, and a mold is formed on the mounting member protruding outside the skin material. After attaching the holding hanger and suspending and holding the bag-shaped skin material at a predetermined position of the molding die via the mold holding hanger, introducing the foamed molding material into the bag-shaped skin material, And a foam molding integrally with the core material, and after the molding, the mold holding hanger is removed to obtain a bag-like skin foam-integrated molded product.