JPH0620034U - Skin forming device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the quality of the skin and the yield of the material in the skin forming device. [Structure] A sheet material 4 having the same outer shape as the outer shape of the molded skin 1 is set on a molding surface 2c of a lower mold 2, and at the time of setting, a side end portion of the sheet material 4 is positioned by a positioning member 6 of the lower mold 2. Hit on. When the upper die 3 moves downward, before the molding surface 3c of the upper die 3 contacts the sheet material 4, the clamp 10 of the upper die 3 presses the peripheral edge portion 4a of the sheet material 4 against the peripheral edge portion of the lower die 2, With the sheet material 4 stretched, the sheet material 4 is pressed between the molding surface 3c of the upper mold 3 and the molding surface 2c of the lower mold 2 to mold the skin 1 having an uneven shape.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a skin forming device suitable for forming a skin (trim) of a vehicle seat.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 6, there is an outer skin 1 of a sheet as described above in which a concave portion 1a and a convex portion 1b are formed in order to emphasize a three-dimensional effect. As a device for molding the skin 1, as shown in FIG. 7, a lower mold (fixed mold) 2 having a recess 2a for molding the recess 1a of the skin 1 and a projection 2b for molding the projection 1b is used. The skin sheet material 4 is formed between the molding surface 2c, the molding surface 3c of the upper mold (movable mold) 3 having the convex portion 3a for molding the concave portion 1a of the skin 1, and the concave portion 3b for molding the convex portion 1b. There is one that is pressed to form a skin 1 having uneven shapes 1a and 1b (see Japanese Utility Model Publication No. 64-4493).

In the above-described conventional skin forming apparatus, the upper die 3 is moved downward and pressed while the sheet material 4 is simply set on the forming surface 2c of the lower die 2, so that the forming surface 3 of the upper die 3 is pressed. When c comes into contact with the sheet material 4, the sheet material 4 having an outer shape larger than the outer shape of the outer skin 1 after molding is required in consideration of the fact that the sheet material 4 is pulled toward the inside.

[0004]

[Problems to be solved by the device]

 However, since the sheet material 4 is pulled toward the inside, the surplus portion of the sheet material 4 is concentrated on the convex portion 1b of the skin 1 at the time of molding, causing wrinkles and sink marks on the skin 1 to deteriorate the quality. There's a problem. Further, since a large sheet material 4 is required, there is a problem that the material yield is low.

Therefore, an object of the present invention is to provide a skin forming apparatus that improves the quality of the skin and the yield of materials.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a skin forming apparatus that presses a sheet material between a forming surface of a lower mold and a forming surface of an upper mold to form an uneven skin. The upper die is provided with a clamp for pressing the peripheral edge of the sheet material to the peripheral edge of the molding surface of the lower die before the molding surface of the lower die contacts the sheet material set on the molding surface of the lower die. One or both of the upper die and the lower die are provided with an elastic mechanism for elastically contacting the clamp with the peripheral edge of the sheet material, while the side surface of the lower die is provided with a molding surface of the lower die. It is characterized in that a positioning member for holding the side end portion of the sheet material to be set is provided.

[0007]

[Action]

 According to the present invention, a sheet material having the same outer shape as that of the outer skin after molding is set on the molding surface of the lower mold. At the time of this setting, the side edge of the sheet material is pressed against the positioning member of the lower die, so that the sheet material can be set accurately at the predetermined position of the lower die with one touch, and the peripheral edge of the sheet material is clamped by the upper die described below. The part is pressed against the peripheral edge of the molding surface of the lower mold, so that it is not necessary to make the sheet material excessively large.

When the upper die moves downward, the peripheral edge of the sheet material is pressed against the peripheral edge of the lower die by the clamp of the upper die before the molding surface of the upper die comes into contact with the sheet material. In this state, the molding surface of the upper mold comes into contact with the sheet material, and the sheet material is pressed between the molding surface of the lower mold and the molding surface of the lower mold to mold the uneven skin.

Since the above-mentioned sheet material is stretched by the clamp, it is not drawn close to the inside during molding, and wrinkles and sink marks do not occur on the epidermis. The clamp elastically contacts the peripheral edge portion of the sheet material by the elastic mechanism, so that even if there is an error in the lower stroke of the upper die, the sheet material is not insufficiently or excessively pressed.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. It should be noted that the parts having the same configurations and operations as those of the conventional art shown in FIGS. As shown in FIGS. 1 and 2, a concave surface 2a and a convex portion 2b are formed on the molding surface 2c of the lower mold (fixed mold) 2, and the molding surface 3c of the upper mold (movable mold) 3 is A convex portion 3a (not specifically shown) that fits into the concave portion 2a of the lower die 2 and a concave portion 3b that fits into the convex portion 2b are formed.

A pressing margin supplemental plate 5 of a peripheral edge portion 4 a of the sheet material 4 is fixed to a side end portion of the lower mold 2. With the supplementary plate 5, the outer shape of the lower mold 2 itself can be reduced, and the mold cost can be reduced.

A positioning member 6 projecting upward from the molding surface 2c of the lower mold 2 is provided on the side end portion of the lower mold 2 (correctly, the supplementary plate 5) with a screw 7 (see FIG. 3A). Or it is fixed with a pin. The positioning member 6 has a structure in which a spacer 8 is interposed as shown in FIG. 3A or a screw hole 9a at a different position as shown in FIG. 3B in order to adjust the positioning position. , 9b, 9c, the structure which fixes to the bracket 9 etc. can be adopted.

The peripheral edge 4 a of the sheet material 4 set on the molding surface 2 c of the lower mold 2 is pressed against the peripheral edge of the molding surface 2 c of the lower mold 2 around the four sides of the molding surface 3 c of the upper mold 3. Clamp plates 10 are provided respectively. The lower end portion 10a of the clamp plate 10 is formed in a shape along the molding surface 2c of the lower mold 2, for example, a curved surface as shown in FIG. 5 (B).

The clamp plates 10 are supported by elastic mechanisms 11 fixed around the lower surface of the upper die 3, respectively. As shown in detail in FIG. 5, the elastic mechanism 11 includes an inverted L-shaped bracket 13 and a bifurcated guide plate 14 fixed to a base 12 fixed to the lower surface of the upper mold 3 with bolts or the like. The guide plate 14 has two forked portions 14a, 14a formed with upward and downward elongated holes 14b, 14b, respectively.

A J-shaped bracket 15 facing the bracket 13 is provided, the bracket 15 is applied to the outer surface of the guide plate 14, and the clamp plate 10 is applied to the inner surface of the guide plate 14. In this state, the upper and lower bolts 16 and 16 are inserted into the elongated holes 14b and 14b from the bracket 15 side, respectively, and are fixed to the clamp plate 10 with screws. As a result, the clamp plate 10 is supported by the guide plate 14 so as to be vertically movable.

When a cylindrical collar 17 is fitted to each bolt 16 that is inserted through the elongated hole 14 b of the guide plate 14 and a washer 18 is provided between the guide plate 14 and the clamp plate 10, the clamp plate 10 The vertical movement of is smooth.

Three coil springs 19, ..., 19 are mounted at a constant interval between the bracket 13 and the bracket 15, and the coil springs 19 serve to clamp the clamp plate via the bracket 15. The collar 17 of the bolt 16 is held at a position in contact with the lower end of the elongated hole 14 b of the guide plate 14 in a state in which 10 is biased in the downward direction. In order to prevent the coil springs 19 from falling, spring holding pins 20, ..., 20 are planted in the brackets 13 and 15, respectively.

In the clamp plate 10, before the upper die 3 moves downward and the molding surface 3 c of the upper die 3 comes into contact with the sheet material 4, the peripheral edge portion 4 a of the sheet material 4 is shaped into the molding surface 2 c of the lower die 2. Set the vertical position so that it is pressed down to the peripheral edge of the.

Of the clamp plates 10, the two clamp plates 10, 10 corresponding to both sides of the molded skin 1 are supported by elastic mechanisms 11 fixed to the upper mold 3, while The two clamp plates 10 and 10 corresponding to the front and rear portions of 1 can be supported by elastic mechanisms 23 fixed to the side edges of the lower mold 2, respectively.

That is, as shown in FIG. 4, the clamp plate 10 is fixed to the lower surface of the upper mold 3 with bolts or the like, while the elastic mechanism 23 moves the pressing plate 24 vertically on the side edge of the lower mold 2. The pressing plate 24 is supported freely and is held at a predetermined projecting position in a state in which the pressing plate 24 is biased in the upward movement direction by the coil spring 25.

Then, the lower end portion 10 a of the clamp plate 10 which moves downward together with the upper die 3 comes into contact with the peripheral edge portion 4 a of the sheet material 4 set on the forming surface 2 c of the lower die 2, and the lower end portion 10 a holds the pressing plate 24. Is moved downward against the urging force of the coil spring 25 until it is aligned with the molding surface 2c of the lower mold 2, so that the peripheral edge 4a of the sheet material 4 is pressed against the pressing plate 24 by the clamp plate 10 and clamped. Become so.

The elastic mechanisms 11 and 23 are not limited to the positions described above. For example, all the elastic mechanisms 11 are fixed to the upper mold 3 or all elastic mechanisms are fixed to the lower mold 2. The structure 23 can also be fixed.

With the above configuration, when the upper die 3 is now in the upper moving position, the clamp plate 10 of the elastic mechanism 11 is biased to the lower moving position by the coil spring 19, and the pressing plate 24 of the elastic mechanism 23 is pressed. Is urged to the upper position by the coil spring 25.

Then, the sheet material 4 having the same outer shape as the outer skin 1 after molding is set on the molding surface 2c of the lower mold 2. At the time of this setting, by pressing the side edge of the sheet material 4 against the positioning member 6 of the lower mold 2, the sheet material 4 can be accurately set at a predetermined position of the lower mold 2 with one touch, and the upper mold described below can be set. In addition to the fact that the peripheral edge portion 4a of the sheet material 4 is pressed against the peripheral edge portion of the lower mold 2 by the clamp plate 10 of No. 3, the sheet material 4 does not need to be extra large as in the conventional case. Loss is reduced and yield is improved. If the press plate 23 of the elastic mechanism 23 is formed with a rising portion 24a (see FIG. 4), the sheet material 4 can be positioned also by this rising portion 24a.

After that, when the upper die 3 is moved downward, before the molding surface 3 c of the upper die 3 contacts the sheet material 4, the peripheral edge portion 4 a of the sheet material 4 is clamped by the clamp plate 10 of the upper die 3 to the lower die 2. Then, the sheet material 4 is clamped by being pressed against the peripheral edge portion and the pressing plate 24 (the state of FIG. 1).

In this state, the molding surface 3 c of the upper die 3 contacts the sheet material 4, and the sheet material 4 is pressed between the molding surface 2 c of the lower die 2 to form the uneven skin 1. To be done.

Since the sheet material 4 is stretched by the clamp plate 10 at the time of molding, it cannot be pulled inward at the time of molding as in the conventional case, and wrinkles and sink marks do not occur on the surface skin 1 after molding, and the quality is improved. Is improved. Further, since each of the clamp plates 10 elastically contacts the peripheral edge portion 4a of the sheet material 4 by the elastic mechanisms 11 and 23, even if there is an error in the lower stroke of the upper die 3, the sheet material 4 is pressed. There is no shortage or excessive pressing, and the sheet material 4 can always be pressed properly. That is, if the sheet material 4 is insufficiently pressed, the sheet material 4 is pulled toward the inside during molding, and conversely, if the sheet material 4 is excessively pressed, it is possible to prevent the clamp plate 10 and the like from being damaged. Further, the clamp plate 10 presses the peripheral edge portion of the sheet material 4 in conjunction with the lower movement of the upper mold 3, so that a separate interlocking mechanism is unnecessary.

[0028]

[Effect of device]

 As is clear from the above description, in the skin forming device of the present invention, a sheet material having the same outer shape as the outer shape of the molded skin is set on the molding surface of the lower mold, and at the time of setting, the sheet material side is set. Since the end is pressed against the positioning member of the lower mold, the sheet material can be accurately set in the predetermined position of the lower mold by one-touch, and the peripheral edge of the sheet material is clamped by the upper mold to the molding surface of the lower mold. Combined with the fact that the sheet material is pressed against the peripheral edge of the sheet, it is not necessary to make the sheet material excessively large, and the material loss is reduced and the yield is improved.

Further, before the molding surface of the upper die contacts the sheet material, the peripheral edge portion of the sheet material is pressed against the peripheral edge portion of the lower die by the clamp of the upper die to stretch the sheet material. When the material is molded, it will not be pulled inward, and wrinkles and sink marks will not occur on the skin, improving quality. Furthermore, since the clamp presses the peripheral edge of the sheet material in conjunction with the downward movement of the upper die, a separate interlocking mechanism is not required and the equipment cost is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a skin forming apparatus of the present invention when clamped.

FIG. 2 is a cross-sectional view of the apparatus of FIG. 1 when the upper die moves up.

FIG. 3 is a sectional view of a modification of the positioning member.

FIG. 4 is a cross-sectional view of an elastic mechanism provided on the lower mold.

FIG. 5 is a side sectional view and a rear sectional view of the elastic mechanism provided on the upper mold.

FIG. 6 is a perspective view of the epidermis.

FIG. 7 is a sectional view of a conventional skin forming device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Epidermis, 1a ... Recessed part, 1b ... Convex part, 2 ... Lower mold, 2c ...
Molding surface, 3 ... Upper mold, 3c ... Molding surface, 4 ... Sheet material, 4a
... peripheral part, 6 ... positioning plate, 10 ... clamp plate, 11,
23 ... Elastic mechanism, 19, 25 ... Coil spring.

Claims (1)

[Scope of utility model registration request] 1. A skin forming apparatus for pressing a sheet material between a molding surface of a lower mold and a molding surface of an upper mold to mold a skin having an uneven shape, wherein the molding surface of the upper mold is a lower mold. A clamp for pressing the peripheral edge of the sheet material to the peripheral edge of the molding surface of the lower mold before contacting the sheet material set on the molding surface is provided on the upper mold, and either the upper mold or the lower mold is provided. One or both of them is provided with an elastic mechanism for elastically contacting the clamp with the peripheral edge of the sheet material, while at the side end of the lower mold, the side end of the sheet material set on the molding surface of the lower mold. A skin forming device, characterized in that a positioning member for holding against is provided.