JPH02225009A - Method for molding headrest and mold - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a headrest molding method and a molding die. More specifically, the present invention relates to a headrest molding method and a molding die. More specifically, the present invention relates to a headrest molding method and a molding die. Insert the headrest frame into the lower mold with the lower end protruding above the stay insertion hole of the upper mold, align the upper mold with the lower mold, and inject the stock solution of foamed synthetic resin into the inside of the skin material. death,
The present invention relates to a headrest molding method and a molding die in which a pad material is integrally foam-molded between the skin material and the headrest frame.

[Conventional technology]

BACKGROUND ART Conventionally, a headrest molding method has been known in which a skin material, a headrest frame, and a pad material are integrally molded. In this case, as shown in FIG. 3, the skin material 5 is placed in advance on the lower mold 2 of the foam mold 1, and the headrest stayer fixed to the headrest frame 6 is inserted into the stay insertion hole 4 of the upper mold 3. , insert the headrest frame 6 inside the skin material 5 of the lower mold 2 with the lower end 7a of the headrest stayer protruding above the upper mold 3, align the upper mold 3 with the lower mold 2, and then A stock solution of foamed synthetic resin is injected through the injection port 9 of the mold 3, and a padding material 8 is integrally foam-molded between the skin material 5 and the headrest frame 6 to form the headrest 1.
0 is formed.

[Problem to be solved by the invention]

However, when using conventional headrest molding methods and molds, unless the dimensions of the stay insertion hole 4 of the upper mold 3 and the headrest stayer match reliably, the stay insertion hole 4 and the headrest stayer will not match. There is a risk that foaming gas, etc. generated during foam molding of the pad material 8 may leak from the gaps that occur between the pad materials 8 and the desired foaming pressure may not be obtained. There was a risk that the stock solution would impregnate the wadding on the back side of the skin material 5 and harden the skin material 5.

The purpose of the present invention is to prevent foaming gas, etc. from leaking from the stay insertion hole, to prevent the progress of impregnation with the stock solution of foamed synthetic resin, to prevent the skin material from hardening, and to obtain a headrest with an excellent feel. The present invention provides a method for molding a headrest and a mold that can produce a headrest.

[Means to solve the problem]

The present invention has been made in view of the above-mentioned problems, and the headrest molding method of the present invention includes disposing a skin material on the lower mold,
The headrest frame is inserted into the lower mold with the lower end of the headrest stay fixed to the headrest frame protruding above the stay insertion hole of the upper mold, the upper mold is molded to the lower mold, and the inner side of the skin material is In the headrest molding method, the headrest stay is covered with a stay cover, and the stay cover is covered with a stay cover, and the headrest stay is covered with a stay cover, and the headrest stay is covered with a stay cover. It is characterized by being brought into close contact with the upper mold side by foaming pressure during foam molding of the material.

Further, in the headrest molding die of the present invention, a skin material is provided on the lower mold, and the headrest frame is lowered with the lower end of the headrest stay fixed to the headrest frame protruding above the stay insertion hole of the upper mold. The headrest is inserted into a mold, the upper mold is molded with the lower mold, a stock solution of foamed synthetic resin is injected into the inside of the skin material, and a pad material is integrally foam-molded between the skin material and the headrest frame. In the mold, the headrest stay is covered with a stay cover, and the stay cover is inserted into the stay insertion hole of the upper mold, and the stay cover is covered with the headrest stay and inserted into the stay insertion hole. a cylindrical part, and a pressing part that is bent and extended from the lower end of the cylindrical part so as to come into contact with the lower surface of the upper mold, and the pressing part is bent and extended from the lower end of the cylindrical part so as to press the end of the skin material during foam molding of the pad material. It is characterized in that the stay cover is brought into close contact with the upper die by the pressing part of the stay cover, and the stay cover can hold the stay insertion hole in a sealed state by the stay cover.

[Effect]

According to the headrest molding method of the present invention, the stay cover is fitted onto the headrest stay inserted into the stay insertion hole, and the stay cover is brought into close contact with the upper mold side by foaming pressure during foam molding of the pad material. As a result, there is no risk of foaming gas, etc. generated during foaming of the foamed synthetic resin stock solution to the outside from the stay insertion hole, and the progress of impregnation of the foamed synthetic resin stock solution into the skin material can be prevented. can.

Further, according to the headrest mold of the present invention, the stay cover that is fitted onto the headrest stay is formed of a cylindrical part that is inserted into the stay insertion hole and a pressing part that comes into contact with the lower surface of the upper mold, and Foaming gas, etc. generated when the synthetic resin stock solution is foamed presses the pressing part of the stay cover, and the pressing part brings the end of the skin material into close contact with the upper mold, and also seals the stay insertion hole, so that foaming gas, etc. It is possible to prevent leakage and to prevent the progress of impregnation of the foamed synthetic resin stock solution into the skin material.

〔Example〕

The headrest molding method and molding die according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an outline of an embodiment in which a headrest is molded using a mold according to the present invention. The mold 12 is provided with an upper mold 13 that is matched with the mold 12, and the lower mold 12 and the upper mold 13 are clamped by an appropriate clamping mechanism 14. A pair of stay insertion holes 13a for inserting a pair of headrest stays 22 are formed in the upper mold 13, and an injection port 15 for an undiluted solution of foamed synthetic resin is also formed. A headrest stay 22 is inserted into the stay insertion hole 13a together with a stay cover 31, which will be described later.

The headrest 20 is connected to the pair of headrest stays 22.
A headrest frame 21 to which is fixed, a band material 23 formed to fit around the outer periphery of this headrest frame 2I, and a band material 23 that fits around the outer periphery of this pad material 23 and are integrally formed during foam molding of the pad material 23. transformed skin material 24
It is formed into a spiky shape. The skin material 24 is formed of a front skin 24a and a wadding 24b made of a foam sheet of urethane or the like bonded to the back side of the top skin 24a. Further, the headrest stay 22 has a plurality of lock sides 22a formed in the vertical direction for vertical position adjustment.

The stay cover 31 is configured so that it can be fitted from the lower end side (upper end side in FIG. 1) of the headrest stay 22, and includes a cylindrical cylindrical portion 32 whose lower end is open, and this cylindrical portion 3.
A pressing part 33 is bent and extended outward from the lower end of 2 so as to come into contact with the lower surface of the upper mold 13, and further bent and extended downward so as to come into contact with the side part of the lower mold 12. We are prepared. Note that the pressing portion 33 may be formed only in the portion that comes into contact with the upper die 13.

A plurality of ring-shaped protrusions 35 and protrusions 36 are formed corresponding to the inner peripheral surface of the lower end of the cylindrical portion 32 of the stay cover 31 and the lock groove 22a for adjusting the vertical position of the headrest stay 22. The protrusion 35 formed at the lower end of the cylindrical portion 32 prevents the foamed synthetic resin stock solution from entering the inside of the cylindrical portion 32, and the protrusion 36 formed corresponding to the lock groove 22a prevents the headrest stay 22 from entering the undiluted solution of the foamed synthetic resin. By supporting this stay cover 31 at a predetermined position of the upper mold 13 or by aligning the pressing part 33 with the upper mold 1
3, the headrest stay 22 and the headrest frame 21 are positioned. It will be clear that the above mentioned examples are not limited to structural acids.

Next, the molding method of the present invention will be explained.

First, as shown in FIG. 2, the stay insertion hole 13a of the upper mold 13 is
Then, insert the cylindrical portion 32 of the stay cover 31 into which the headrest stay 22 is inserted. stay cover 3
The end 2 of the skin material 24 between the pressing part 33 of 1 and the upper mold 13
Hold 5. By fitting the protrusion 36 of the cylindrical portion 32 of the stay cover 31 into the lock groove 22a of the headrest stay 22, the headrest stay 22 and the stay cover 31 are positioned.

Next, the upper mold 13 is molded to the lower mold 12, and a stock solution of foamed synthetic resin is injected through the injection port 15 to form a pad material 23 integral with the skin material 24 and the headrest frame 21 by foam molding.

The pressing part 33 of the stay cover 31 is pressed against the lower surface of the upper mold 13 and the side of the lower mold 12 by the foaming pressure generated when foaming the pad material 23 by injecting the stock solution of foamed synthetic resin, and the stay is inserted. The hole 13a is the pressing part 33 and the cylindrical part 32.
sealed by. Therefore, the foam material 23 can be molded at a desired foaming pressure. Note that the undiluted solution of the foamed synthetic resin is impregnated between the back surface of the end 25 of the skin material 24 and the pressing portion 33, so that leakage of foaming gas, etc. from this portion can be prevented. Further, the end 25 of the skin material 24 is brought into close contact with the upper mold 13, so that shaping can be easily performed. Further, the skin material 24 can be positioned and attached to the upper mold 13.

In the above embodiment, the upper mold 13 includes a stay cover 31° and a headrest stay 22. The case has been described in which the upper mold 13 is molded to the lower mold 12 after attaching the skin material 24 in a predetermined relationship. 31 and headrest stay 22
When attaching the upper mold 13 to the lower mold 12,
The end 25 of the skin material 24 may be held between the upper mold 13 and the pressing part 33, and in this case, the cylindrical part 32 of the stay cover 31 is moved downward with respect to the upper mold 13. It is also possible to position the terminal 25 of the skin material 24 by moving it upward when clamping it.

After foam molding the pad material 23, open the upper mold 13, remove the stay cover 31 from the upper mold 13, and remove the stay cover 31 from the upper mold 13.
is removed from the headrest stay 22, and at this time, the joint portion between the pressing part 33 of the stay cover 31 and the end 25 of the skin material 24 is peeled off and removed, and then the end of the skin material 24 is treated to obtain the headrest 20. can.

〔Effect of the invention〕

The above is the method and configuration of one embodiment of the headrest molding method and molding die according to the present invention. According to such method and configuration, leakage of foaming gas etc. from the stay insertion hole can be effectively prevented. The pad material can be foam-molded at the desired foaming pressure, and the wadding on the back side of the skin material can be prevented from being impregnated with the foamed synthetic resin stock solution, which may harden the skin material and worsen the feel. It is possible to obtain a headrest molding method and a mold that are excellent in feel and appearance, and easy to position the skin material, headrest frame, and stay cover, improving work efficiency, and having excellent economic efficiency.

[Brief explanation of the drawing]

FIGS. 1 and 2 each schematically show an embodiment of a mold according to the present invention for carrying out the method for molding a headrest according to the present invention, and FIG. 1 shows a state in which the pad material of the headrest is molded. 2 is a sectional view showing a stay cover and a skin material attached to an upper mold, and FIG. 3 is a sectional view showing a conventional headrest molded state. In the figure, 11... foaming mold, 12... lower mold, 13...
... Upper mold, 13a... Stay insertion hole, 15... Inlet, 20... Headrest, 21... Headrest frame, 22... Headrest stay, 23...
Pad material, 24...Skin material, 24a...Skin, 24
b... Wadding, 25... Terminal, 31... Stay cover, 32... Cylindrical part, 33... Pressing part, 35
... protrusion, 36... protrusion. Figure 1 Figure 2

Claims (2)

[Claims] (1) Arrange the skin material on the lower mold, insert the headrest frame into the lower mold with the lower end of the headrest stay fixed to the headrest frame protruding above the stay insertion hole of the upper mold, and insert the headrest frame into the lower mold, and In the headrest molding method, the headrest stay is molded into a lower mold, a stock solution of foamed synthetic resin is injected into the inside of the skin material, and a pad material is integrally foam-molded between the skin material and the headrest frame. 1. A method for molding a headrest, comprising: fitting a stay bar over the pad material, and bringing the stay cover into close contact with an upper mold side by foaming pressure during foam molding of the pad material. (2) Arrange the skin material on the lower mold, insert the headrest frame into the lower mold with the lower end of the headrest stay fixed to the headrest frame protruding above the stay insertion hole of the upper mold, and insert the headrest frame into the lower mold, and In the headrest mold, the headrest stem is molded into a lower mold, a stock solution of foamed synthetic resin is injected into the inside of the skin material, and a pad material is integrally foam-molded between the skin material and the headrest frame. A stay cover is fitted onto the headrest stay, and the stay cover can be inserted into a stay insertion hole of the upper mold, and the stay cover is fitted with a headrest stay and has a cylindrical portion inserted into the stay insertion hole. , a pressing part bent and extending from the lower end of the cylindrical part so as to come into contact with the lower surface of the upper mold, and when foam-molding the pad material, the end of the skin material is pressed by the pressing part of the sticker bar. 1. A mold for a headrest, characterized in that the stay insertion hole can be held in a sealed state by a stay cover, and the stay insertion hole can be held in a sealed state by a stay cover.