JPH114981A - Manufacturing method of seat cushion pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify drilling process of a seat cushion pad that is inserted with an insert-wire. SOLUTION: This manufacturing method of seat cushion pad is to press and heat a fiber aggregation B that is mixed with binding fibers between an under-form 1 having an insert-wire-set protruding 5 that is set with an insert- wire 3, and a top-form 2 having a receiving hole 6 for the protruding. And to make a penetrating hole 7 made and penetrated by the insert-wire-set protruding 5 and an excess part 8 protruded and formed by fiber aggregate stuffed by the insert-wire-set protruding 5 into a receiving hole 6 for the protruding. The relieving part 8 is excised at the base end of the same after a molded commodity A, which is inserted with the insert-wire 3, is formed.

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 cushion pad for a vehicle or the like.

[0002]

2. Description of the Related Art In manufacturing a seat cushion pad of a fibrous structure having a through hole through which a terminal portion of a seat cover of a seat cushion is inserted, conventionally, a fiber assembly is pressed between a lower mold and an upper mold. Then, a molded product is formed by applying pressure, and then a through-hole is punched out of the molded product by, for example, a punching process using a Thomson blade press to produce a seat cushion pad.

[0003]

When a through-hole is punched by drilling in the thickness direction of a molded product, in a molded product with an insert wire in which an insert wire is insert-molded, the drilling is hindered by the insert wire. Therefore, there is a problem that it is difficult to punch through holes, and a water jet drilling method that solves this problem has a problem that the cost is high in equipment and the like, and mass production processing is unsuitable. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to simplify the drilling of a molded product for a seat cushion pad, thereby reducing the production cost of the seat cushion pad.

[0004]

According to a first aspect of the present invention, there is provided a fiber assembly in which binder fibers are mixed, wherein an insert wire set projection formed in a lower mold penetrates through the fiber assembly to form an upper mold projection receiving hole. And the insert wire is set in the insert wire set protrusion, and is pressed and heated between a lower mold and an upper mold, and a through hole penetrated by the insert wire set protrusion; Forming a molded product for a seat cushion pad, which has a meat steal portion formed by a fiber group packed in the projection receiving hole by a wire set projection and connected to the through hole, and having an insert wire inserted therein. Then, the meat stealing part is cut off at its base end and cut off.

[0005] According to the first aspect of the present invention, the fiber assembly mixed with the binder fiber is pressed and heated between the lower mold and the upper mold in which the insert wire is set, and the sheet in which the insert wire is inserted is inserted. When molding the cushion pad molded product, the insert wire is set on the lower die insert wire set protrusion, and the insert wire set protrusion penetrates the fiber assembly and protrudes into the upper die protrusion receiving hole to make the fiber When the assembly is pressed and heated, a through-hole penetrated by the insert wire set projection and a part of the fiber assembly are packed into the projection receiving hole by the insert wire set projection and formed to project, and the through-hole is formed. A molded product for a seat cushion pad having a steal portion connected to the seat cushion is formed. When the meat stealing part is cut off from the molded product for seat cushion pad by slicing to cut the base end of the stealing part,
A seat cushion pad having a through-hole through which an insert wire is inserted and into which an insert wire is inserted can be manufactured.

According to a second aspect of the present invention, in the first aspect of the present invention, the exposed portion of the wire body of the insert wire having the wire body and the fiber block fixed to the wire body is attached to the insert wire set projection. The fiber assembly is pressed and heated while being inserted.

According to the second aspect of the present invention, the fiber assembly is inserted into the lower mold and the upper mold with the exposed portion of the wire body of the insert wire having the structure in which the fiber block is fixed to the wire body inserted into the insert wire set projection. When pressed and heated by the above, a molded article for a seat cushion pad in which the insert wire is inserted into the fiber assembly with the fiber block of the insert wire fixed to the fiber assembly is formed.

[0008]

Next, embodiments of the present invention will be described with reference to the drawings. The molded product A for a seat cushion pad is made of a fiber assembly B containing a matrix fiber which is non-meltable at a molding temperature and mixed with a binder fiber which melts at the molding temperature and exhibits an adhesive property. B is formed by molding into a predetermined shape with the insert wire 3 inserted in B.

As shown in FIG. 3, the insert wire 3 is formed by arranging a plurality of fiber blocks 3a formed by solidifying a group of fibers into a rectangular parallelepiped and arranging them in a wire 3b penetrating the center of the fiber block 3. It has a structure inserted and fixed.

As shown in FIGS. 5 (a) and 5 (b), press forming in which a fiber assembly B is pressed and heated between a lower die 1 and an upper die 2 to form a molded product A for a seat cushion pad. In the apparatus, as shown in FIG. 3, the lower mold 1 has a shape curved to match the shape of the design surface P1 (see FIG. 2) of the seat cushion pad P, and is surrounded by a rectangular tubular wall plate 1d. The lower formed plate 1a is installed.

As shown in FIGS. 3 and 5 (a), the lower forming plate 1a of the lower die 1 receives the hot air flowing into the lower die 1 through the hot air inlet 1b opened at the lower end of the wall plate 1d. A large number of ventilation holes 1c for feeding onto the forming plate 1a are provided.

As shown in FIG. 3, the lower forming plate 1a of the lower die 1
A plurality of (in this example, one set of two) insert wire set protrusions 5 on which the insert wire 3 is set in a state where the wire body 3b of the insert wire 3 is inserted.
The insert wire set projections 5 of each set are arranged at intervals corresponding to the arrangement intervals of the fiber blocks 3a of the insert wires 3.

As shown in FIG. 5B, the height of each insert wire set projection 5 is such that the insert wire set projection 5 penetrates the fiber assembly B when the fiber assembly B is pressed, and Are set so as to project from the fiber assembly B.

As shown in FIG. 3, each of the insert wire set projections 5 is cut in a vertical direction so that the exposed portion of the wire body 3a of the insert wire 3 is inserted through the groove 5a so as to be able to escape upward. Are formed respectively,
Each of the insert wire set projections 5 has a plurality of ventilation holes 5b through which hot air flows.

On the other hand, as shown in FIGS. 4 and 5 (a) and (b), the upper die 2 has a rear surface P2 of the seat cushion pad P.
An upper molded plate 2a having an uneven shape conforming to the shape of FIG. 2 (see FIG. 2) and a rectangular cylindrical outer frame 2b fitted into the lower molded plate 1a of the lower mold 1 are formed.

As shown in FIG. 5 (b), the upper mold plate 2a of the upper mold 2 has a large number of hot air passing through the air holes 1c of the lower mold 1 and the fiber assembly B and flowing into the upper mold 2. The upper die 2 has a top plate 2d having an exhaust port 2e for discharging the hot air flowing into the upper die 2.

As shown in FIGS. 4 and 5 (a) and (b), when the fiber assembly B is pressed between the lower mold 1 and the upper mold 2 on the upper molding plate 2a of the upper mold 2. A plurality of square hole-shaped protrusion receiving holes 6 into which the vicinity of the tip of the insert wire set protrusion 5 of the lower die 1 is fitted are formed at intervals corresponding to the arrangement state of the insert wire set protrusions 5.

A large number of ventilation holes 6a are provided through the wall of each projection receiving hole 6, respectively.

In press-molding the molded product A for a seat cushion pad using the above-described molding apparatus, a fiber assembly B in which matrix fibers and binder fibers are mixed is put on a lower molding plate 1a of the lower mold 1. Then, the exposed portion of the wire body 3b of the insert wire 3 is inserted into the groove 5a of the insert wire set projection 5 of the lower die 1 to set the insert wire 3 on the lower die 1.

In this state, the upper mold 2 is lowered to blow hot air into the lower mold 1, and the fiber assembly B is compressed between the lower mold 1 and the upper mold 2 as shown in FIG. By tightening and heating, the matrix fiber is welded and joined by the binder fiber to form a molded product A in which the insert wire 3 is inserted.

When the fiber assembly B is pressed between the lower mold 1 and the upper mold 2 during molding of the molded article A, the insert wire set projections 5 of the lower mold 1 penetrate through the fiber assembly B and receive a projection receiving hole. 6 and the vicinity of the tip of each insert wire set projection 5 is fitted into each projection receiving hole 6 (see FIG. 5B).

As shown in FIG. 1, a plurality of molded articles A formed by the respective insert wire set projections 5 through which the wire bodies 3b of the insert wires 3 are inserted are inserted into the molded article A by pressing and heating the fiber assembly B. A through hole 7 is provided. Further, the molded article A has a hole 8a which is formed by inserting a part of the fiber assembly B into the projection receiving hole 6 by the insert wire set projection 5, and is formed to communicate with the through hole 7. Are formed in a protruding manner, and each fiber block 3 of the insert wire 3 is formed.
a is welded and joined to the constituent fibers of the molded product A.

Next, the molded article A shown in FIG. 1 is taken out from the molding apparatus, and the base end of each of the pits 8 of the molded article A is cut by slicing in a direction parallel to the surface of the molded article A. When each of the meat stealing portions 8 is cut off, one end of the through hole 7 is exposed, the through hole 7 has a through hole 7 through which the wire body 3b of the insert wire 3 is inserted, and the seat cushion pad P of FIG. Can be manufactured.

According to the above-described embodiment, the through-hole 7 into which the insert wire 3 is inserted by the slicing process for cutting off the meat stealing portion 8 from the molded product A for the seat cushion pad.
The punching process of punching the through-hole 7 in the thickness direction of the molded product A becomes unnecessary, and the disadvantage that the drilling process is hindered by the insert wire is eliminated, so that the seat cushion pad P having the through-hole 7 can be formed. Can be satisfactorily manufactured, the manufacturing process of the seat cushion pad P can be simplified, and the manufacturing cost of the seat cushion pad P can be reduced.

Also, the insert wire 3 can be accurately positioned and inserted into the molded product A, and the displacement of the insert wire 3 can be eliminated to stabilize the quality of the molded product A for the seat cushion pad. it can.

Further, since the insert wire 3 can be inserted into the molded product A in a state where the fiber block 3a of the insert wire 3 is firmly fixed to the fibers constituting the molded product A for the seat cushion pad, the insert wire 3 can be inserted. Can be strengthened and stabilized.

[0027]

According to the first aspect of the present invention, a through-hole through which an insert wire is inserted can be formed by slicing to cut out a stolen portion from a molded product for a seat cushion pad. Drilling in the thickness direction of the molded product is unnecessary, and it is possible to produce a seat cushion pad having a through hole satisfactorily without the disadvantage that the drilling is hindered by the insert wire,
The manufacturing process of the seat cushion pad can be simplified and the manufacturing cost of the seat cushion pad can be reduced.

Further, the insert wire can be accurately positioned and inserted into the molded product, and the position of the insert wire can be eliminated to stabilize the quality of the molded product for the seat cushion pad.

According to the second aspect of the present invention, the insert wire can be inserted into the molded product while the fiber block of the insert wire is firmly fixed to the fibers constituting the molded product for the seat cushion pad. The insert state of the wire can be strengthened and stabilized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a molded product for a seat cushion pad according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the seat cushion pad.

FIG. 3 is a perspective view of a lower mold and an insert wire.

FIG. 4 is a perspective view of an upper die.

FIG. 5 is a longitudinal sectional view of a molding apparatus showing a molding method of a molded article for a seat cushion pad, wherein (A) shows an initial molding step and (B) shows a molding end step.

FIG. 6 is an enlarged sectional view of a main part of the molding apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower mold 2 Upper mold 3 Insert wire 3a Fiber block 3b Wire body 5 Insert wire set projection 6 Projection receiving hole 7 Through hole 8 Stealth part A Molded product for seat cushion pad B Fiber assembly P Seat cushion pad

Claims (2)

[Claims] An insert wire set projection formed in a lower mold of a fiber assembly mixed with a binder fiber penetrates through the fiber assembly and projects into a projection receiving hole of an upper mold, and the insert wire is inserted into the insert wire set. While being set on the projection, the lower mold and the upper mold are pressed and heated, and packed into the projection receiving hole by the insert wire set projection and the through hole provided by the insert wire set projection. A molded part for a seat cushion pad in which an insert wire is inserted, the molded part having a meat steal portion protruded by a set of fibers and connected to the through hole, and then the meat steal part is moved to the base end thereof. A method for manufacturing a seat cushion pad, characterized in that cutting is performed by cutting with a pad. 2. A fiber assembly is pressed and heated while an exposed portion of a wire body of an insert wire having a wire body and a fiber block fixed to the wire body is inserted into the insert wire set projection. The method for manufacturing a seat cushion pad according to claim 1, wherein: