JPS6021535B2 - Manufacturing method of synthetic resin sheet frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a synthetic resin sheet frame that does not waste materials and can reduce costs.

2. Description of the Related Art Conventionally, seats for vehicles or interior equipment have been made of synthetic resin reinforced with glass fiber or the like.

Here's an example of how the seat frame is made! As shown in FIG. First, as shown in Figure 1, the seat frame, which is the base of the seat, is usually made by planing a synthetic resin board, heating it, pressurizing it, and molding it in a press, and then trimming the top green part to form a predetermined shape. Form into.

Thereafter, as shown in FIG. 2, the hollowed out portion 3 is pierced to reduce weight, vent air, and improve cushioning properties. In the figure, the hollowed out part 3 is shown as a rectangle, but it may be punched out in many round or square shapes. In such the above manufacturing method,
It requires a relatively large amount of man-hours, and there is a lot of loss of synthetic resin material, which has the disadvantage that it is surprisingly difficult to reduce costs. The present invention was created with the aim of eliminating the drawbacks of the conventional manufacturing methods described above, and aims to provide a method for manufacturing synthetic resin sheet frames that requires less man-hours and equipment, and can be made at low cost without causing any material loss. It is something.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3 is a plan view showing an example of cutting off a plate-shaped synthetic resin material into a comb tooth shape, Figure 4 is a plan view of the shape before being press-molded into a seat frame, and Figure 5 is an upper mold. ,
A sectional view of the lower mold, Fig. 6 is a plan view in case of material replenishment, and Fig. 7 is a sectional view of the lower mold.
This figure is a plan view before the frame is formed, showing a shape of division and cutting different from that shown in FIG. 4, and FIG. 8 is also a plan view of another similar example.

In Figures 3 to 8, 2 is a flange raised upward around the seat frame, 3 is a hollowed out part, 4 is a reinforced synthetic resin seat frame material, 5a and 5b are frame intermediate materials, 6 is an upper mold for molding the seat frame, 7 is a pusher fixed (or integrated) with the upper mold 6, 8 is a lower mold, and 9 is a lower mold 8
a retainer that engages with the hollowed out portion 3 that is fixed to (or integrated with);
Reference numeral 10 indicates a presser plate attached to the upper surface of the holder 9, 11 indicates a comb-shaped protrusion, and 12 indicates an auxiliary material as a special case.

In Figure 3, seat frame material 4 made of reinforced synthetic resin
is a standard plate material with a predetermined thickness and width, which is cut into equal parts in the horizontal direction of the material 4 in the horizontal direction of the material 4 by a press to form frame intermediate materials 5a and 5b, and then cut into frame intermediate materials 5a and 5b. Cut at the position indicated by the broken line.

As shown in FIG. 4, the cut frame intermediate materials 5a and 5b are cut into a lower die 8 in FIG.
Place it on top.

Here, the frame molding die will be explained with reference to FIG. 5. The upper die 6 has a presser metal 7 at a position that matches the protrusion 11 (see FIG. 4), and the lower die 8 has a lightening die shown in FIG. 4. Holders 9 are fixedly installed at intervals matching the portions 3, and a push spring 10 is provided on the upper surface of the retainers 9 to receive the upper mold 6 when the upper mold 6 is lowered.

In the figure, 5a and 5b are frame intermediate materials, and c is the lowering distance of the upper mold 6. After heating the intermediate materials 5a and 5b, the lower mold 8
The hollowed out part 3 is iron-coupled to the upper retaining metal 9 and arranged with a certain interval.

Thereafter, when the upper die 6 is lowered, the protrusions 11 shown in FIG. 4 are pressed and expanded in the direction of the arrow in FIG.
The above-mentioned expansion is limited to the direction of the arrow of the protrusion 11 because of the holding metal 9, and does not extend to the machine. The frame intermediate materials 5a and 5b may be heated by a heating device in front of the press die line shown in FIG. 5, or may be heated at a separate location and transported to the press molding machine.

FIG. 6 shows the procedure when it is necessary to form the flange part 2 particularly thickly. After placing another auxiliary material 12 on one of the intermediate materials 5a and 5b, it is heated and the frame is formed as described above. This is an example of molding.

In the example shown in FIG. 4, the mutually bonded portions of the protrusions 11 are approximately on the same line, and there may be some elutriation points due to the strength, so the manufacturing method shown in FIG. 7 may also be considered. That is, the lengths of the protrusions 11 are not equal, and the above-mentioned press forming is performed by cutting the protrusions 11 into comb-tooth shapes such that the long and short protrusions intersect with each other.
If this is done, the bonding lines will form a zigzag shape and the strength will be improved. Although FIG. 8 shows an example of a variation of the tooth-shaped protrusion 11 of the intermediate materials 5a, 5b, there may be many variations of this shape.

By adopting the manufacturing method of the synthetic resin seat frame of the present invention as explained above, the number of man-hours is relatively low, there is no material loss,
Therefore, since no material waste is generated, there is no pollution problem caused by the processing, and there is no need for processing costs, which has the effect of reducing costs.

[Brief explanation of the drawing]

Figures 1 and 2 show seat frames manufactured using conventional methods. Figure 1 is a perspective view after press forming, Figure 2 is a perspective view of the product, and Figure 3 is a plan view of an example of the material cut into sections. , Fig. 4 is a plan view of the intermediate material arrangement before frame molding, Fig. 5 is a sectional view of the upper mold and lower mold, Fig. 6 is a plan view of a special case in which auxiliary material is used in part, Fig. 7, FIG. 8 is a plan view of an example different from FIG. 4. 1... Seat frame, 2... Flange section, 3...
... Thickening part, 4 ... Frame material, 5a,
5b...Frame intermediate material, 6...Upper mold, 7...
...Press metal, 8...Lower die, 9...Retainer metal, 10...Press plate, 11...Protrusion part. Figure 1 Lacquer 2 Figure 3 Figure 4 Figure 5 Figure 6 Beads Figure 8

Claims (1)

[Claims] 1 One end of a synthetic resin material having a predetermined thickness and width is cut into equal parts in a comb-tooth shape in the longitudinal direction, and this is sheared into a predetermined length, and the two forming materials are spaced apart to form a comb-tooth protrusion. are placed between the upper mold and the lower mold, facing each other with the molds on the inside, and after heating, the upper mold is lowered to spread the comb-shaped protrusions under pressure, butt and weld them, and at the same time A method for manufacturing a synthetic resin seat frame characterized by molding a flange portion.