JP3703605B2 - Manufacturing method of seat cushion pad - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a seat cushion pad for a seat such as an automobile.
[0002]
[Prior art]
When manufacturing a seat cushion pad of a fiber structure having a through-hole through which the end portion of the seat cover of the seat cushion is inserted, conventionally, the fiber assembly is formed by pressing and pressing between a lower mold and an upper mold. After the product was molded, a seat cushion pad was produced by punching through holes in the molded product, for example, by drilling with a Thomson blade press.
[0003]
[Problems to be solved by the invention]
When punching through-holes by punching in the thickness direction of the molded product, it is difficult to punch through-holes in insert-wire-molded products in which the insert wire is insert-molded because the insert wire is obstructed by the insert wire. In the water jet drilling method that solves this problem, there is a problem that the cost is high in terms of equipment and the like and the mass production processing is not suitable.
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, simplify the drilling process of a molded product for a seat cushion pad, and reduce the manufacturing cost of the seat cushion pad.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, the insert wire set projection formed in the lower mold of the fiber assembly mixed with the binder fiber penetrates the fiber assembly and enters the upper mold receiving hole, and the insert wire is inserted into the insert. In a state of being set on the wire set protrusion, pressing and heating are performed between the lower mold and the upper mold, and a through hole penetrated by the insert wire set protrusion and inside the protrusion receiving hole by the insert wire set protrusion And a meat stealing part that is formed to protrude by a group of fibers packed into the through hole and connected to the through hole, and after molding a molded product for a seat cushion pad in which an insert wire is inserted, the meat stealing part is It is characterized by cutting and cutting at the proximal end.
[0005]
In the invention of claim 1, 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 seat cushion pad in which the insert wire is inserted. When forming the molded product, the insert wire is set on the lower mold insert wire set projection, and the insert assembly is projected into the upper mold projection receiving hole. When 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 to form a projection, and are connected to the through-hole. A molded product for a seat cushion pad having a meat stealing portion is formed. When the meat stealer is cut by slicing to cut the proximal end of the meat stealer from this molded product for seat cushion pad, a seat cushion pad with a through hole through which the insert wire is inserted and an insert wire inserted is produced. can do.
[0006]
Invention of Claim 2 is the state which inserted the exposed part of the wire body in the insert wire set protrusion in invention of Claim 1 among the insert wires which have a wire body and the fiber block fixed to this wire body. The fiber assembly is pressed and heated.
[0007]
In the invention of claim 2, the fiber assembly is pressed by the lower die and the upper die while the exposed portion of the wire body of the insert wire having a structure in which the fiber block is fixed to the wire body is inserted into the insert wire set protrusion. When tightened and heated, a molded article for a seat cushion pad in which the insert wire is inserted into the fiber assembly is formed in a state where the fiber block of the insert wire is fixed to the fiber assembly.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
A molded product A for a seat cushion pad includes a fiber assembly B in which a binder fiber that melts at a molding temperature and exhibits a bonding performance is mixed with a fiber assembly B that is a non-melting matrix fiber at a molding temperature. It is manufactured by molding into a predetermined shape with the insert wire 3 inserted in B.
[0009]
As shown in FIG. 3, the insert wire 3 includes a plurality of fiber blocks 3a formed by solidifying a fiber group and formed into a rectangular parallelepiped shape, and are inserted into a wire body 3b penetrating through the center of the fiber block 3 and fixed in a line. Has a structured.
[0010]
As shown in FIGS. 5 (a) and 5 (b), in the press molding apparatus for molding the seat cushion pad molded product A by pressing and heating the fiber assembly B between the lower mold 1 and the upper mold 2; As shown in FIG. 3, the lower mold 1 has a shape that is curved in accordance with the shape of the design surface P1 (see FIG. 2) of the seat cushion pad P, and is surrounded by a square cylindrical wall plate 1d. A molded plate 1a is installed.
[0011]
As shown in FIGS. 3 and 5 (a), the lower molding plate 1a receives 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 vent holes 1c for feeding upward are provided.
[0012]
As shown in FIG. 3, a plurality of insert wires 3 are set on the lower molding plate 1a of the lower mold 1 in a state where the wire body 3b of the insert wires 3 is inserted (in this example, one set of two pieces). The insert wire set projections 5) are formed so as to protrude, and 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.
[0013]
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 the tip of the insert wire set projection 5 is It is set so as to protrude from the fiber assembly B.
[0014]
As shown in FIG. 3, each insert wire set protrusion 5 is formed with a groove portion 5 a that is cut along the vertical direction and through which the exposed portion of the wire body 3 a of the insert wire 3 is inserted so as to be able to escape upward. In addition, each insert wire set protrusion 5 is provided with a plurality of vent holes 5b through which hot air flows.
[0015]
On the other hand, as shown in FIGS. 4 and 5 (a) (b), the upper mold 2 has an upper molding plate 2a having an uneven shape that matches the shape of the back surface P2 (see FIG. 2) of the seat cushion pad P; An outer frame 2b having a rectangular tube shape that is fitted into the lower molding plate 1a of the lower mold 1 is formed.
[0016]
As shown in FIG. 5 (b), the upper molding plate 2a of the upper mold 2 has a large number of ventilation holes through which hot air having passed through the ventilation holes 1c of the lower mold 1 and the fiber assembly B flows into the upper mold 2. An exhaust port 2e for discharging hot air flowing into the upper mold 2 is opened in the top plate 2d of the upper mold 2.
[0017]
As shown in FIGS. 4, 5 (b) and 5 (b), when the fiber assembly B is pressed between the lower mold 1 and the upper mold 2, the lower mold is placed on the upper molding plate 2 a of the upper mold 2. A plurality of square hole-shaped projection receiving holes 6 into which the vicinity of the tip of one insert wire set projection 5 is fitted are recessed at intervals corresponding to the arrangement state of the insert wire set projection 5.
[0018]
A large number of ventilation holes 6 a are provided through the wall portions of the projection receiving holes 6.
[0019]
When the molded product A for seat cushion pad is press-molded using the molding apparatus described above, the fiber assembly B in which the matrix fibers and the binder fibers are mixed is put on the lower molding plate 1a of the lower mold 1 and the lower mold The exposed portion of the wire body 3 b of the insert wire 3 is inserted into the groove portion 5 a of the one insert wire set protrusion 5, and the insert wire 3 is set on the lower mold 1.
[0020]
In this state, the upper die 2 is lowered and hot air is sent into the lower die 1, and the fiber assembly B is pressed and heated between the lower die 1 and the upper die 2 as shown in FIG. Then, the molded product A in which the insert wire 3 is inserted is formed by welding and bonding the matrix fiber with the binder fiber.
[0021]
When the molded product A is molded, when the fiber assembly B is pressed between the lower mold 1 and the upper mold 2, the insert wire set projection 5 of the lower mold 1 penetrates the fiber assembly B and enters the projection receiving hole 6. It enters, and the vicinity of the tip of each insert wire set projection 5 is fitted into each projection receiving hole 6 (see FIG. 5B).
[0022]
As shown in FIG. 1, a plurality of through-holes 7 formed by the insert wire set protrusions 5 and inserted through the wire bodies 3 b of the insert wires 3 are formed in the molded product A by pressing and heating the fiber assembly B. Is penetrated. Further, the molded product A has a hole portion 8 a in which a part of the fiber assembly B is packed into the protrusion receiving hole 6 by the insert wire set protrusion 5 and is formed and communicated with the through hole 7. A plurality of meat stealing portions 8 connected to each other are protruded and each fiber block 3a of the insert wire 3 is welded and joined to the constituent fibers of the molded product A.
[0023]
Next, the molded product A shown in FIG. 1 is taken out from the molding apparatus, and the base end of each meat stealing portion 8 of the molded product A is cut by slicing in a direction parallel to the surface of the molded product A to steal each meat. When the portion 8 is cut off, one end of the through hole 7 is exposed, the through hole 7 into which the wire body 3b of the insert wire 3 is inserted, and the seat cushion pad P of FIG. be able to.
[0024]
According to the above embodiment, the through hole 7 through which the insert wire 3 is inserted can be formed by slicing the meat stealing portion 8 from the molded product A for the seat cushion pad. Punching in the thickness direction of the sheet becomes unnecessary, and the seat cushion pad P having the through hole 7 can be satisfactorily produced without the trouble that the drilling process is hindered by the insert wire. The manufacturing process can be simplified and the manufacturing cost of the seat cushion pad P can be reduced.
[0025]
Further, the insert wire 3 can be accurately positioned and inserted into the molded product A, and the quality of the seat cushion pad molded product A can be stabilized by eliminating the displacement of the insert wire 3.
[0026]
Furthermore, since the insert wire 3 can be inserted into the molded product A in a state in which the fiber block 3a of the insert wire 3 is firmly fixed to the fiber constituting the molded product A for the seat cushion pad, the insert wire 3 is inserted. Can be strengthened and stabilized.
[0027]
【The invention's effect】
According to the first aspect of the present invention, the through hole through which the insert wire is inserted can be formed by slicing the meat stealing portion from the molded product for the seat cushion pad, and the through hole is formed into the thickness of the molded product. This eliminates the need for punching in the direction and eliminates the problem that the drilling process is hindered by the insert wire, thus making it possible to satisfactorily produce a seat cushion pad having a through hole and simplifying the manufacturing process of the seat cushion pad. The manufacturing cost of the seat cushion pad can be reduced.
[0028]
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.
[0029]
According to the invention of claim 2, since the insert wire can be inserted into the molded product in a state where the fiber block of the insert wire is firmly fixed to the fiber constituting the molded product for the seat cushion pad, the insert of the insert wire The state 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 showing an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a seat cushion pad in the same manner.
FIG. 3 is a perspective view of a lower mold and an insert wire.
FIG. 4 is a perspective view of an upper mold.
FIGS. 5A and 5B are longitudinal sectional views of a molding apparatus showing a molding method of a molded product for a seat cushion pad, where FIG. 5A shows an initial molding process and FIG. 5B shows a molding end process.
FIG. 6 is an enlarged cross-sectional view of a main part of the molding apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower mold | type 2 Upper mold | type 3 Insert wire 3a Fiber block 3b Wire body 5 Insert wire set protrusion 6 Projection receiving hole 7 Through-hole 8 Meat stealing part A Seat cushion pad molding B Fiber assembly P Seat cushion pad

Claims (2)

The insert wire set protrusion formed in the lower mold of the fiber aggregate mixed with the binder fiber penetrates the fiber aggregate and enters the upper mold protrusion receiving hole, and the insert wire is set in the insert wire set protrusion. In a state, by pressing and heating between the lower mold and the upper mold, by a through hole penetrated by the insert wire set projection, and a group of fibers packed in the projection receiving hole by the insert wire set projection And forming a molded part for a seat cushion pad having an insert wire inserted therein, and then cutting the meat stealing part at its proximal end and excising it. A method of manufacturing a seat cushion pad, comprising: Of the insert wire having a wire body and a fiber block fixed to the wire body, the fiber assembly is pressed and heated in a state where an exposed portion of the wire body is inserted into the insert wire set protrusion. The manufacturing method of the seat cushion pad of Claim 1 to do.

Images