CN1080174C - Method for making pillow - Google Patents

Abstract

The object of the present invention is to prevent the foaming liquid for molding the filler from leaking to the outside in a headrest cushion formed by integrally foaming the filler and the skin sewn into a bag shape. The feature of the present invention is: on the end edge of the opening A of the skin C sewn into a bag shape, a cover piece 1 with an injection port 10A extending inward is provided; after inserting the injection nozzle 30, the filler is molded Inject with foaming liquid.

Description

Manufacturing method of head cushion

The present invention relates to a method for manufacturing a headrest of a seat for an automobile, and more specifically, to a method for manufacturing a headrest in which a filler is integrally foamed in a bag-shaped skin.

Among the existing head cushions, there is a head cushion constructed in such a way that the U-shaped strut is installed inside the opening of the bag-shaped skin, and hair is injected into the skin. Foam, so that the filler is formed integrally with the epidermis.

At this time, in order to prevent the foaming liquid from leaking out from the opening of the skin, a pair of tongues extending along the edge of the skin are provided from the opening to the inside of the bag, and the sleeve is sandwiched between the tongues. Shaped sheet; by inserting the injection nozzle for injecting the foaming liquid used for filler foaming into the cylindrical sheet, the filler and the skin are foamed into one body (for example, see Japanese Patent Publication No. 6-45149 Publication No. 7-31759 and JP-A-7-31759).

Therefore, according to this conventional method, after the filler is foamed and molded, the cylindrical sheet must be detached from the skin, resulting in poor workability and a problem that the skin may be damaged during detachment.

Therefore, it is an object of the present invention to eliminate the above-mentioned problems in the conventional methods.

In order to achieve the above object, the present invention provides a method of manufacturing a headrest made of a foamed product integrated with the skin. In the headrest, a part of the pole is sewn into the opening of the bag-shaped skin. Install it inside, and inject foaming liquid into the skin, so that the filler and the skin are foamed into one; at the end edge of the opening of the skin, a cover piece with an injection port extending inward is provided; On the injection port of the cover piece, the injection nozzle for injecting the above-mentioned foaming liquid inserted through the opening is inserted, and then the filler is foamed and formed. It is characterized in that the above-mentioned cover piece extends along the left and right ends of the opening. ; The cover sheet A extending along one end edge is longer than the cover sheet B extending along the other end edge, and has a longer overall length towards the inside of the bag-shaped skin, and the above-mentioned cover sheet A is inserted through the cover sheet A. Fill nozzle.

The foaming liquid injected into the epidermis from the injecting nozzle is blocked by the cover sheet inside the epidermis so that it does not leak out of the epidermis.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a partially cutaway perspective view illustrating the method of the present invention.

Fig. 2 is a cross-sectional view of a portion of a sewn bag-like skin used in the present invention.

Fig. 3 is a perspective view of a skin used in the present invention.

Fig. 4 is a sectional view of a headrest produced by the method of the present invention.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Fig. 1 shows the state when the foaming liquid for filler foam molding is injected into the skin C sewn into a bag shape by the injection nozzle 30 by the method of the present invention; there is an opening between the base fabrics 2A and 1A that constitute the skin C A, a U-shaped strut S is installed near the opening A, and the legs of the strut S protrude outward from the through-holes in the base fabric 1A.

The injection nozzle 30 is provided on the L-shaped plate 4 that expands the opening A toward the closing direction, and the opening is configured by making both ends of the L-shaped plate 4 contact the two ends of the opening A. The left and right end edges of the skin of A are formed into a shape that closes the opening A in a straight line that is pulled outward and joined together.

Above epidermis C, as shown in Fig. 2, Fig. 3, is sewn into bag shape.

Fig. 2 is the state when it is fixed in the molding die, and Fig. 3 is the state after the skin C is sewn.

The skin C is a multilayer body comprising: a skin portion composed of a fabric texture, raised cloth, etc.; a padding composed of a slab of urethane foam fixed integrally with the inside of the skin portion; and A packing case integrally formed on the outside of the packing.

The left and right end portions B, B of the above-mentioned base fabrics 2A, 1A constituting the bottom of the headrest are integrally sewn by a sewing thread B1 as shown in FIGS. 2 and 3 .

Furthermore, openings A are formed between the edge edges of the base fabrics 2A and 1A that are sewn.

The base fabrics 2A, 1A constituting the left and right end portions of the opening A are integrally sewn together by sewing threads B2, B2.

Let the base fabric between the seams B2 and B2 be the cover sheets 2 and 1 . Therefore, the cover sheets 1, 2 are formed by extending a part of the base fabrics 2A, 1A, and one cover sheet A1 has a longer protrusion than the other cover sheet B2; A protruding piece 10 is extended, and an injection port 10A is opened in the protruding piece 10 . 3 in the figure shows the injector connected to the injection nozzle 30 via a funnel.

The above protruding piece 10 is also made of the same material as the base fabric 1A like the cover sheet A1, that is, it is also formed as a multilayer body composed of the above-mentioned skin portion, packing, and packing cover. The inner diameter of the injection port 10A, which is opened on the protruding piece 10, forms a smaller diameter with respect to the outer diameter of the injection nozzle 30 inserted in the injection port 10A, so that the mouth edge of the injection port 10A is formed by the elasticity of the filler. Elastic contact is made with the injection nozzle 30 to prevent leakage of the foaming liquid from the injection port 10A.

In addition, when the cover sheet A1 is longer than the cover sheet B2, as shown in the figure, it is not necessary to provide the protruding piece 10 on the cover sheet A1, but the injection port 10A can be provided at a part protruding from the cover sheet B2. on the cover sheet A1.

The skin C is sewn into the state shown by the solid line in Figure 3; when the cover pieces A1 and B2 are inserted inside, as shown in the dotted line in Figure 3 and Figure 2, the cover pieces A1 and B2 are facing the skin C's internal orientation. In addition, through-holes (not shown) for inserting both legs of the stay S are opened in the base fabric 1A.

As shown in the figure, by sewing the cover sheet A1 and the cover sheet B2 together with the sutures B1 and B2, and at the same time making the cover sheet A1, B2 and the base fabric 1, 2 integrally composed of fillers, the cover sheet can be When the cover sheet A1 and the cover sheet B2 are inserted into the skin C, the opening A is blocked by making the cover sheet A1 and the cover sheet B2 elastic in the direction of mutual engagement.

Next, insert the pole S close to the opening A, so that the two legs of the pole S protrude outward from the through holes provided on the base fabric 1A; then, as shown in Figure 1, install the upper The jig constituted by the L-shaped plate 4 bulges the opening A formed by the cover piece A1 and the cover piece B2 outward to close it; at the same time, insert the injection nozzle 30 integrated with the plate 4 into the protruding piece 10 of the injection port 10A.

Then, it is fixed in the head cushion foam molding mold, and the foaming liquid is injected through the nozzle 30, so that the filler P and the skin C are foamed into one; after the foaming is completed, demoulding is performed, and the injection nozzle 30 is taken out, The head cushion as shown in Fig. 4 can be obtained.

That is, in the state where the opening A is closed, from the foaming pressure of the foaming liquid, the cover sheet A1 and the protruding piece 10 of the part longer than the cover sheet B2 are developed according to the formula that covers the cover sheet B2. Foam molding: The filler P can be foamed without leaking the foam liquid from the opening A or the injection port 10A to the outside of the headrest.

According to the present invention, since the filler is integrally foamed with the skin by inserting the injection nozzle into the injection port located on the cover sheet inside the skin sewn into a bag shape, it is used for foam molding of the filler. The foaming liquid can be blocked by the cover sheet. Therefore, the foaming liquid does not leak to the outside, and it is possible to provide a headrest which is a skin-integrated foam product with excellent appearance quality.

Also, since it is not necessary to use a cylindrical sheet as in the above-mentioned conventional method, the work of attaching and detaching the sheet is not required, thereby improving workability.

Claims (5)

1. A method of manufacturing a head cushion. The head cushion is installed inside the opening of a bag-shaped skin with a part of the pole sewn into it, and injects a foaming liquid into the skin, so that the filler and The skin is integrally formed by foaming; on the edge of the opening of the skin, a cover sheet with an injection port extending inward is provided; on the injection port of the cover sheet, the injection port for injection is inserted through the opening. The foaming liquid is injected into the nozzle, and then the filler is foamed and formed. It is characterized in that: the above-mentioned cover piece extends along the left and right end edges of the opening; The edge-extended cover piece B has a longer overall length toward the inside of the bag-shaped skin, and the above-mentioned injection nozzle is inserted into the cover piece A. 2 . A method of manufacturing a headrest according to claim 1 , wherein a protruding piece is extended from the front end of the cover piece, and the injection port is provided on the protruding piece. 3 . 3. A method of manufacturing a headrest cushion as claimed in claim 1, wherein the above-mentioned cover piece and the protruding piece are made of the same material as the skin; the opening is bulged toward its closing direction by the jig , and then foam the filler into shape. 4. A method of manufacturing a headrest cushion according to claim 1, wherein the cover pieces A and B are elastic in the direction of mutual engagement and block the opening. 5. A method of manufacturing a headrest cushion as claimed in claim 1, characterized in that: the cover sheet having the above-mentioned injection port is formed by fillers made of foam; the inner diameter of the injection port is larger than the outer diameter of the injection nozzle formed smaller.

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