JPH0616028U - Structure of mold for frame molding made of blow molded products for automobile seats - Google Patents

Abstract

(57) [Summary] [Purpose] A molding die for frame molding of an automobile seat, which is formed by blow molding, is capable of forming a recessed groove portion capable of reliably engaging the end of the skin. [Structure] A guide elongated hole (5) is provided in a molding die (3) in an inclined shape toward the cavity, and a movable plate (6) is attached to and retractable from the elongated guide hole (5) in the cavity. Characterize.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to the structure of a frame-molding die made of a blow-molded product used for automobile seats.

Some conventional seats for automobiles, particularly seat backs of Lya seats, use a frame made of a blow molded product in order to reduce the weight. An example of this seat back (SB) is shown in FIG. In the figure, (1 ') is a hollow, substantially box-shaped frame made of blow-molded product, (2') is a skin groove engaging groove provided on the back side of the frame (1 '). By inserting the retainer (81 ') made of a synthetic resin plate fixed to the end of the skin (8) into the outer shell (8), the skin (8) covering the foam cushion body (9) is fixed. It The recessed groove portion (2 ') is formed in a shallow groove at a right angle to the back surface of the frame (1') having mold release and moldability.

[0003]

[Problems to be solved by the device]

 Therefore, since the groove (2 ') has a shallow depth and is formed in a right angle shape, the skin (8) locked in the groove (2') of the frame (1 ') of the conventional product described above. The retainer (81 ') was detached from the groove (2'), and the skin (8) was easily peeled off. Therefore, an object of the present invention is to provide a blow mold capable of molding a frame made of a blow molded product in which the retainer is hard to come off.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a guide elongated hole in which a guide elongated hole is provided in a portion forming a back surface side of a frame in a molding die for molding a hollow box-shaped frame in an inclined shape toward a cavity. The movable plate is slidably inserted into the hole, and the movable plate is mounted in the cavity so as to be retractable.

[0005]

[Action]

 After the frame is blow molded into a hollow box shape with the movable plate protruding inside the cavity, the movable plate is stored in the mold from the cavity and then removed from the mold. The attached frame can be molded.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a state at the time of blow molding. In the figure, (11) is a parison for frame molding, (21) is a part of the parison (11), and is blow molded at the time of molding the parison (11). The movable plate (6) inserted into the guide long hole (5) provided in the upper mold (3) at the time of frame molding shows the concave groove forming portion. ) Is formed so as to project into the cavity.

This movable plate (6) is slidably inserted into a guide slot (5) provided in the upper mold (3), and the guide slot (5) is sewn to the end of the skin (8). The retainer (1) made of a synthetic resin plate has substantially the same length as that of the retainer (1), and is formed so as to be inclined toward the inside of the cavity. The movable plate (6) is attached to and retracted from the cavity by movable means such as a cylinder (7).

FIG. 2 shows a state in which the frame (1) is blow-molded and then released from the mold. The movable plate (6) protruding into the cavity by the cylinder (7) is guided to the upper mold (3). After being stored in the long hole (5), the upper and lower molds (3) and (4) are released from each other, whereby the hollow substantially box-shaped frame (1) having the concave groove portion (2) is formed.

3 and 4 show a frame (1) formed by using the above-mentioned molding die, and a large number of groove portions (2) are formed along the edge of the frame (1) on the back surface side. Each of the recessed grooves (2) is formed in a slanted shape so that the lower end thereof faces the side wall (1a) of the frame (1) as shown in FIG.

FIG. 5 shows a seat back (SB) of an automobile seat using the above frame (1), and the foam cushion body (9) provided on the surface side of the frame (1) is a skin. A plate-shaped retainer (1) is sewn to the end of the skin (8) with a certain interval, and each retainer (81) is inserted into the groove (2). It has been stopped. Since the retainer (81) is locked in the concave groove portion (2) formed in an inclined shape with respect to the bottom surface of the frame (1), the retainer (81) does not escape from the concave portion (2).

[0011]

[Effect of device]

 According to the present invention, a guide elongated hole is provided in the mold in an inclined shape toward the cavity, a movable plate is slidably inserted into the guide elongated hole, and the movable plate is mounted in the cavity so as to be retractable. Therefore, after the blow molding, by storing the movable plate in the mold from the inside of the cavity, it is possible to form the concave groove portion having an opening that is not in the same direction as the mold releasing direction.

[0012] Therefore, since a concave groove portion for locking the skin end whose tip is inclined outward can be formed on the back surface of the hollow box-shaped frame, the concave groove portion is formed at the end of the skin. When the provided retainer is inserted and locked, it becomes difficult for the retainer to come off, and peeling of the epidermis can be prevented.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a frame is blow-molded using a mold according to the present invention.

FIG. 2 is a cross-sectional view of a state in which the mold is removed after blow molding in the drawing.

FIG. 3 is a perspective view of a frame molded by the molding die according to the present invention.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a cross-sectional view of a seat back using a frame molded by the molding die according to the present invention.

FIG. 6 is a sectional view of a seat back using a conventional frame.

[Explanation of symbols]

 1 Frame 3, 4 Mold 5 Guide long hole 6 Movable plate

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Claims (1)

[Scope of utility model registration request] 1. A guide elongated hole is formed in an inclined shape toward a cavity in a portion forming a back surface side of a frame in a mold for molding a hollow substantially box-shaped frame, and a movable plate is slidable in the guide elongated hole. A structure for a frame-molding die made of a blow-molded article for an automobile seat, characterized in that the movable plate is inserted into and retracted from the inside of the cavity.