JPH01308620A - Molding manufacture of external leather bag for headrest for automobile - Google Patents

Abstract

PURPOSE:To manufacture the skin having a pattern of a headrest body by placing a synthetic resin sheet heated onto both molds, pushing the synthetic resin sheet against a recessed section having a pattern by negative pressure from the mold side and compressed air from the upper side of the synthetic resin sheet and transferring the pattern of the recessed section to the synthetic resin sheet. CONSTITUTION:An arbitrary number of pinholes 5a, 5b formed to the recessed sections 4a, 4b of molds 3a, 3b are introduced to a negative pressure source, synthetic resin sheets 1a, 1b are sucked to the recessed sections 4a, 4b with patterns while compressed air is injected into covers 11 for compressed air, the synthetic resin sheets 1a, 1b are contact-bonded with the recessed sections 4a, 4b with the patterns, and the patterns of the recessed sections 4a, 4b are transferred to the synthetic resin sheets 1a, 1b. The covers 11 for compressed air and holding frames 2a, 2b are removed, intermediate heaters 16 are inserted, and the molten positions of the synthetic resin sheets 1a, 1b are heated. A frame 15 is fitted to a main mold (under the state in which negative pressure is kept) 1a, and the main and sub molds 3a, 3b are pressure-welded. The upper and lower synthetic resin sheets 1a, 1b are heat-fused to a collar form along the external shape of a headrest body 12 and the external shape of a window hole 17, and the outsides are cut.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an outer leather bag for a headrest that is attached to the upper end of the seatback of the front seat of an automobile in order to prevent the occurrence of whiplash when the automobile is rear-ended. This relates to a molding manufacturing method.

[Prior Art] In order to adjust the height of the headrest relative to the seat back, the legs of the inverted U-shaped frame are inserted into the vertical holes of the seat back, a height positioning device is attached, and the upper piece of the inverted U-shaped frame is attached. The headrest body is attached to the upper part including the headrest. The headrest main body is pillow-shaped, and its surface is made of a synthetic resin skin material, and a sponge material is inserted between the skin material and the inverted U-shaped frame.

There are also some headrests with a textured pattern added to the surface material of the headrest body to improve its appearance.

Conventionally, the textured skin has been produced using a mold with a textured pattern carved into it.
A molding method in which synthetic resin powder raw materials are heated to around 80℃ and sprinkled and melted (powder fludge uni method), or a cylindrical flexible synthetic resin material is surrounded by a three-dimensional mold and then placed inside the flexible synthetic resin material. An air nozzle was inserted and air was forced into the mold to press the flexible synthetic resin material against the mold, transferring the grain pattern (blow molding method).

Then, a raw material such as foamed urethane was injected into the flexible synthetic resin outer skin made by the above method and heated to fill the flexible synthetic resin bag with foamed urethane.

[Problems to be Solved by the Invention] The above-described conventional grained skin of the headrest body was expensive to manufacture.

This invention aims to manufacture the skin material of the headrest body by a method that is cheaper and simpler than conventional methods.

This will be explained with reference to the drawings.

The method for manufacturing an outer skin bag for an automobile headrest according to the first invention includes a main mold 3a that divides the headrest body 12 into two parts.
and a secondary mold 3b are prepared, and the heated synthetic resin sheet 1
Place a and 1b on both molds 3a and 3b and mold 3a and 3b.
The synthetic resin sheets 1a, 1b are pressed onto the patterned recesses 4a, 4b by negative pressure from the side and air pressure from above the synthetic resin sheet 13.1b, and the patterns of the recesses 4a, 4b are applied to the synthetic resin sheets 1a, 1b. Transfer process and main mold 3 under negative pressure
a step of placing the headrest frame 15 on top a;
placing the sub mold 3b in a negative pressure state on the main mold 3a, fusing the peripheral flange 18 and cutting the outside thereof;
This process consists of removing the negative pressure from the molds 3a and 3b, separating the molds 3a and 3b, and removing one bag of synthetic resin sheets.

Further, a second invention is a recess 4 in the first invention.
Protrusions 6a and 6b are provided at the center of the parts a and 4b, a net 14 is stretched on the headrest frame 15, and the sub-mold 3
1a) is placed on the main mold 3a, the peripheral flange 18 is fused and the outside thereof is cut.

This is characterized in that the synthetic resin sheaths 1a and 1b around the net 14 from which the extra thickness of 1b has been cut off are also fused together.

[Function] Inside this headrest outer bag, as shown in Fig. 13,
When the nozzle 20 is inserted at the Kanagata 22.22, raw materials such as foamed urethane 21 are injected, and heated and foamed.
The product shown in FIG. 14 is completed and can be used as a bed rest.

[Example] (a) As shown in FIG. 2, the peripheral edges of synthetic resin sheets 1a, 1b such as PVC, P, P, 8BS, etc. are held between holding frames 2a, 2b.

(b) Next, as shown in FIG. 3, the holding frames 2a and 2b are placed in the heating furnace 10
12 by moving the synthetic resin sheets 1a and 1b relative to each other.
Heat for 1 to 1.5 minutes to 0 to 200°C.

(c) As shown in FIG.
The mold 4b is brought into airtight contact with the main and sub molds 3a and 3b which are at room temperature or in a heated state, and covered with a lid 11 for compressed air.

(d) An arbitrary number of small holes 5a, 5b provided in the recesses 4a, 4b of the molds 3a, 3b are guided to a negative pressure source, and the synthetic resin sheets 1a, 1b are
The synthetic resin sheets 1a and 1b are attracted to the patterned recesses 4a and 4b by applying negative pressure to the mold side, and compressed air of 2 to 8 kg/cd is injected into the compressed air lid 1, and the synthetic resin sheets 1a , 1b are crimped to the patterned recesses 4a and 4b, and the recesses 4
By transferring the patterns a and 4b onto the synthetic resin sheets 1a and 1b, the synthetic resin sheets 1a and 1 have the patterns transferred to each of the shapes obtained by dividing the headrest body 12 into two.
Mold each b.

(E) As shown in FIG. 5, while maintaining the negative pressure in the molds 3a and 3b, the compressed air is removed, and the compressed air lid 11 and the holding frames 'la and 2 are removed.
Remove b.

(F) As shown in Fig. 6, the main mold 3a and the sub mold 3b (with negative pressure maintained) are arranged with a distance between them, and the mold 3a
, 3b, inserting an intermediate heater 16 between the crimping points,
Upper and lower synthetic resin sheets la.

Heat the fused portion 1b.

(g) As shown in Fig. 7, the frame 1 with the mounting bracket 13 and the mesh 14 is embedded in the main mold la (while maintaining negative pressure).
Insert 5. However, if a net 14 is provided, the excess portions of the synthetic resin sheets 1a and 1b at the portions to be welded to the net are removed in advance.

(blood) As shown in FIG. 9, the main and sub molds 3a and 3b are pressed together.

Then, the upper and lower synthetic resin sheets 13.1b are heat-sealed in a brim shape along the outer shape of the headrest main body 12 and the outer shape of the window hole 17, and the outer sides thereof are cut. If a mesh 14 is provided, a gap corresponding to the thickness of the mesh is provided in the mold.

The shapes of the fused and cut portions of both molds 3a and 3b have the shapes shown in FIGS. 9 to 12 (A), and the dimensions D=1, 0 to 3. O
m, E=1.0~4.0 Tsuru, F=1.5~2゜0m, G
= 2 to 5 days, H-2 to H-4, respectively, the fused and cut state with the cross-sectional shape of (B) is obtained.

In addition, in FIG. 12 where the tsuba 18 is large, the figure (C)
Attach the molding 19 as shown.

Through the above steps, an outer skin bag for a headrest as shown in FIG. 1 is completed.

Inside this headrest outer bag, as shown in Figure 13,
When the nozzle 20 is inserted at the Kanagata 22.22, raw materials such as foamed urethane 21 are injected, and heated and foamed.
The product shown in FIG. 14 is completed.

In the embodiment, as shown in FIG. 15, the recess 4a,
By removing the protrusions 5a and 5b of 4b and omitting the net 14, a headrest body without window holes 17 can be obtained.

In addition, the Kanagata 22 can be used in common by providing the main and sub-die molds 3a and 3b with that function.

[Effects of the Invention] According to the present invention, it is possible to easily make a patterned outer skin bag for a headrest.

[Brief explanation of the drawing]

FIG. 1 is a side view of the headrest outer bag combined with the frame, and FIGS. 2 to 8 are manufacturing process diagrams. Figures 9 to 12 show the fused state of the main and sub-molds, (A)
is a cross-sectional view of the mold, and (B) is a cross-sectional view of the product. 13th
Figure (C) is a side view with the molding attached, the 14th
The figure is a side view of the completed headrest. FIG. 15 is a diagram corresponding to FIG. 7 of another embodiment. la, Ib synthetic resin sheets 2a, 2b
Holding frames 3a, 3b Main and sub molds 4a, 4b Recesses 5a, 5b Small holes 6a, 6b Projection 10 Heating furnace 11 lid 12 Headrest body 13 Embedded mounting bracket 14 Net 15 Frame 16 Movable intermediate heater 17
Window hole 18 Flange 19 Molding 20 Nozzle 21 Urethane foam 22 Kanagata Patent Applicant Nanjo Gizo Kogyo Co., Ltd. Agent
Person Patent Attorney Furu 1) Tsuyoshi Kei Figure 1 Figure 2 Figure 7 Figure 1θ Figure (A) (A) Figure 72 (A) <AJ Is the number a drawing procedure? +li formal writing (method) 1. Display of the case Japanese Patent Application No. 63-141991 No. 2, Name of the invention Method for molding and manufacturing outer skin bags for automobile headrests 3, Person making the amendment Relationship to the case Patent applicant Nanbu Gisou Kogyo Co., Ltd. 4, Agent ■730 ( Telephone 082-227-2289) 58 Date of amendment order August 30, 1985 6. Number of claims increased by amendment None 7. Subject of amendment Brief explanation of drawings section of specification Page 9 of specification Lines 19-20 [is. Figure 13 (C) is a cross-sectional view of the side with the molding attached, and Figure 13 (C) is a sectional view of the side with the molding attached. "Disclaimer"
and correct it.

Claims (1)

[Claims] 1. A main mold (3a) that divides the headrest body (12) into two parts.
) and a sub-mold (3b) are prepared, heated synthetic resin sheets (1a, 1b) are placed on both molds (3a, 3b), and negative pressure from the mold (3a, 3b) side is applied. Resin sheet (1
The synthetic resin sheets (1a, 1b) are pressed onto the patterned recesses (4a, 4b) by compressed air from above the recesses (4a, 4b), and the patterns of the recesses (4a, 4b) are shaped into the synthetic resin sheets (1a, 1b).
), a step of placing the headrest frame (15) on the main mold (3a) under negative pressure, and a step of placing the sub mold (3b) under negative pressure on the main mold (3a). The molds (3a, 3b) are placed on the molds (3a, 3b), the negative pressure of the molds (3a, 3b) is released, and both molds (3a, 3b) are placed on the mold (3a, 3b).
) A method for molding and manufacturing an outer skin bag for an automobile headrest, which comprises the step of separating the synthetic resin sheet bag and removing it. 2.Protrusions (6a, 6b) are provided in the center of the recesses (4a, 4b), and the headrest frame (15) has a net (1).
4) is stretched, and when placing the secondary mold (3b) on the main mold (3a), fusing the peripheral flange (18) and cutting the outside thereof,
2. The outer skin bag for a head restraint for an automobile according to claim 1, wherein the synthetic resin sheet surrounding the net (14) is also fused by cutting off the surplus portion of the synthetic resin sheet around the net in advance. molding manufacturing method.