JPH11192628A - Manufacture of seat pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent a foamed resin from creeping round to an exposed surface side of a nonwoven fabric incident to the molding of a seat pad by a method wherein the nonwoven fabric is facially positioned in a cavity space to a shaping surface side to be assembled with a tool surface of a molding tool, and the seat pad is molded integrally with the nonwoven fabric of the foamed resin. SOLUTION: A press tool 2 press molds a nonwoven fabric for a cushion pad. By using the press tool 2, one face side is kept in a fiber state as it is with a cold press tool 2b, and the other face side is press molded to a specific shaped surface with a hot press tool 2. Thereby, a three dimensionally shaped nonwoven fabric is obtained from a cottony body 1'. Then, the nonwoven fabric is assembled in a foam molding tool equipped with top and bottom forces. In this case, the nonwoven fabric is assembled in the foam molding tool by positioning the specific shaping surface facially in the foam molding tool. After assembling the nonwoven fabric, the molding tool is clamped, and the cushion pad is foam molded integrally with the nonwoven fabric from the foamed resin of an urethane or the like.

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 seat pad having a nonwoven fabric on the back side of the seat pad in order to prevent generation of rubbing noise between the seat pad and the seat frame.

[0002]

2. Description of the Related Art In general, in a vehicle seat, a nonwoven fabric is provided on the back side of a seat pad as a measure for preventing rubbing noise caused by a seat pad and a seat frame.

Conventionally, in order to provide the nonwoven fabric on the back side of the seat pad, a nonwoven fabric sewn in a sheet shape or a certain three-dimensional shape is assembled in a mold, and the sheet pad is integrally foamed. Have been done. However, since the nonwoven fabric has surface rigidity, the followability of the nonwoven fabric due to the foam molding of the seat pad is poor, and the foamed resin is likely to wrap around to the exposed surface side of the nonwoven fabric due to poor setting in the mold or the like.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to prevent the foamed resin from going around the exposed surface of the nonwoven fabric with the foam molding of the seat pad, and to prevent the rubbing noise caused by the seat pad and the seat frame. An object of the present invention is to provide a method for manufacturing a seat pad in which a nonwoven fabric is appropriately provided on the back side of the seat pad.

[0005] In addition, another object of the present invention is to provide a method of manufacturing a seat pad which can easily obtain a nonwoven fabric suitable as a measure for preventing rubbing noise caused by a seat frame at low cost.

[0006]

According to a first aspect of the present invention, there is provided a method of manufacturing a seat pad, wherein one side of a cotton-like body is kept fibrous and the other side is pressed to a predetermined shaping surface. A molded three-dimensional non-woven fabric is obtained, the non-woven fabric is positioned in the cavity space on the shaping surface side, assembled to the mold surface of the molding die, and a sheet pad is foam-molded integrally with the non-woven fabric from a foamed resin. I have.

According to a second aspect of the present invention, in the method for manufacturing a seat pad, a cotton-like body is press-molded using a mold having a hot press mold on one side and a cold press mold on the other side. While keeping one side from the body as fibrous,
A three-dimensional nonwoven fabric is formed by press-molding the other surface into a predetermined shaping surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, a manufacturing process of a seat pad shown in the drawings is as follows. First, as shown in FIG. A non-woven fabric is press-formed from the floc 1 'as a raw material. To press-form this non-woven fabric, one side is a hot press mold 2a.
A press forming die 2 having a cold press die 2b on the other side is used.

The press mold 2 is for press-molding a nonwoven fabric for a cushion pad, and has a molding surface having a mold surface shape capable of forming a recess for assembling a cushion frame. In addition, since the nonwoven fabric is press-formed by feeding the continuous strip-shaped cotton-like material 1 ', the press-forming of the non-woven fabric at the same time as the press-forming of the nonwoven fabric can be performed from the raw cotton-like material 1'. The mold is used.

As shown in FIG. 2, one side 1a of the press forming die 2 is kept in a fibrous state by a cold press die 2b, and the other side 1b is formed on a predetermined shaping surface by a hot press die 2a. 3D non-woven fabric 1 by press molding
From the floc 1 '. Next, this nonwoven fabric 1 is shown in FIG.
Is assembled in a foaming mold 3 having upper and lower dies 3a and 3b as shown in FIG. At this time, the non-woven fabric 1 is
b is positioned in the cavity space 3c and assembled into the foam molding die 3. After assembling the nonwoven fabric 1, the molding die 3 is clamped to foam the cushion pad 4 integrally with the nonwoven fabric 1 from a foamed resin such as urethane.

When the cushion pad 4 is foam-formed integrally with the nonwoven fabric 1 in this manner, the nonwoven fabric 1 is preliminarily formed so as to conform to the shape of the back surface of the cushion pad 4. It is possible to accurately assemble along the surface, and it is possible to surely prevent a setting failure such as the occurrence of the inflow of the foamed resin. In addition, since the shaping surface 1b of the nonwoven fabric 1 with reduced air permeability is positioned in the cavity space 3c and assembled in the foam molding die 3, the followability of the nonwoven fabric 1 to the cushion pad 4 can be improved. The nonwoven fabric 1 can be appropriately integrally formed on the back surface of the cushion pad 4.

In the manufactured cushion pad 4, no infiltration of the foamed resin or the like is present on the back side, and the back side is formed of the fiber surface of the nonwoven fabric 1 which is kept in the fibrous state of the cotton-like body 1 ′. By doing so, it is possible to reliably prevent generation of abnormal noise due to friction with the cushion frame in an assembled state with the cushion frame. Although the above embodiment has been described with reference to the case where a cushion pad for a seat is manufactured, the present invention can be similarly applied to manufacture a back pad.

[0013]

As described above, according to the method for manufacturing a seat pad according to the first aspect of the present invention, one side of the cotton-like body is kept in a fibrous state, and the other side is formed into a predetermined shaping surface. A non-woven fabric of a three-dimensional shape obtained by press molding is obtained, the non-woven fabric is positioned in the cavity space on the shaping surface side, assembled to the mold surface of the mold, and the sheet pad is foam-formed integrally with the non-woven fabric from the foamed resin, Since the non-woven fabric is pre-formed so as to match the back surface shape of the seat pad, the non-woven fabric can be assembled accurately according to the mold surface of the molding die, and set failures such as intrusion of the foamed resin can be ensured. Can be prevented.

In addition, since the shaping surface of the non-woven fabric having reduced air permeability is located in the cavity space and is assembled in the mold, the followability of the non-woven fabric to the seat pad can be improved and the non-woven fabric can be formed. It can be appropriately integrally formed on the back surface of the seat pad. Further, since the back side of the seat pad is formed of the fiber surface of the non-woven fabric which is kept in a fibrous state of the cotton-like body, it is ensured that abnormal noise due to rubbing with the seat frame in an assembled state with the seat frame is ensured. Can be prevented.

According to the method for manufacturing a seat pad according to the second aspect of the present invention, the cotton-like body is press-formed using a forming die having one side as a hot press die and the other side as a cold press type. While keeping one side from the flocculent as fibrous,
By obtaining a three-dimensional nonwoven fabric in which the other surface is press-molded to a predetermined shaping surface, a suitable nonwoven fabric can be easily manufactured at low cost as a measure for preventing rubbing noise caused by the seat frame.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a press forming process of a nonwoven fabric in a manufacturing process of a seat pad according to the present invention.

FIG. 2 is an explanatory view schematically showing a nonwoven fabric obtained in the press molding step of FIG.

FIG. 3 is an explanatory view showing a sheet pad forming step of assembling the nonwoven fabric of FIG. 2 into a mold and performing foam molding.

[Explanation of symbols]

Reference Signs List 1 'flocculent body 1 nonwoven fabric 1a one side of nonwoven fabric to be kept in a fibrous state 1b other side of nonwoven fabric having predetermined shaping surface 2 nonwoven fabric press molding die 2a cold press die 2b hot press die 3 sheet pad foam molding Type 4 seat pad

Claims (2)

[Claims] 1. A three-dimensional nonwoven fabric obtained by press-molding one side of a cotton-like body on one side while maintaining the other side on a predetermined shaping surface, and placing the nonwoven fabric in a cavity space on the shaping surface side. A method for manufacturing a seat pad, characterized in that it is positioned on the surface and assembled to the mold surface of a molding die, and the seat pad is foam-formed integrally with the nonwoven fabric from a foamed resin. 2. A cotton-like body is press-molded using a mold having one side as a hot press mold and the other side as a cold press mold.
2. The seat pad according to claim 1, wherein a one-sided side is kept fibrous from the cotton-like body, and a three-dimensional nonwoven fabric is formed by press-molding the other side on a predetermined shaping surface. Manufacturing method.