JPS634933A - Apparatus for stamping molding fender liner - Google Patents

Abstract

PURPOSE:To mold a thin fender liner generating no wrinkles, by mounting a preceding clamp consisting of three movable clamps. CONSTITUTION:In a stamping molding apparatus, the inside of the parts grasped by sheet clampers 2 of a resin sheet 1 are further grasped by a movable preceding clamp consisting of a central clamp 3b and end clamps 3a, 3c in order to prevent that the resin sheet 1 is pulled in at the time of molding. The central clamp 3b is moved to the sheet clamper side while the resin sheet 1 is grasped to hold the position thereof and the end clamps 3a, 3c are respectively rotated to the sheet clamper side around the fulcrums 8a, 8c at central side end parts while grasp the resin sheet to hold the angles thereof and width narrowing quantity is partially altered. Next, an upper mold 4 and a lower mold 5 are matched to press the resin sheet 1. By this constitution, a thin fender liner can be molded without generating wrinkles.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fender liner stamping forming apparatus.

[Conventional technology]

Conventionally, vacuum pressure forming has been used to form fender liners, but stamping molding has been used due to demands for product precision and cost reduction. The fender liner is formed by stamping, as shown in FIG. The resin sheet 11 is clamped, the width of the resin sheet 11 is adjusted, and the resin sheet 11 is conveyed into a molding machine. In order to prevent the resin sheet 11 from being pulled into the mold and coming off the sheet clamper during mold clamping, the resin sheet 11 is further clamped by the preceding ramp 13. In addition, the lamp 13 to be performed first
Although the clamp mechanism is omitted in FIG. 4, as shown in FIGS. 5 a) and 5 b), a hydraulic cylinder 17 is provided, and the resin sheath 11 is held between the hydraulic cylinders 17. Next, the resin sheet 11 is pressed by an upper mold 14 and a lower mold 15 while being clamped by the preceding lamp 13, and after being kept cooled, the mold is opened. The molded resin sheet is clamped by a sheet clamper 12 after opening the lamp 13 and conveyed to the next trimming process. The molded resin sheet has a shape in which left and right fender liners 18 are connected, as shown in FIG.
By trimming along the trimming line 19, left and right fender liners 18 are obtained.

[Problem that the invention seeks to solve]

However, when stamping is performed as described above, the length of the resin sheet 11 is constant at any position where it is clamped, whereas the length of the molded resin sheet 11 is as shown in FIG. points A, B,
Each one is different in C. Therefore, the sheet is stretched in the long parts of the molded product, resulting in thin walled parts. In addition, since the sheet tends to be left over in the shorter parts of the molded product, many wrinkles occur on the surface of the product.

Therefore, the appearance and physical properties of the product cannot be satisfied.Therefore, in order to mold a molded product having such a curved surface, sheets such as those described in JP-A-81-2527 and JP-A-80-991332 are used. It is possible to apply a molding device in which the clamp frame that clamps the material can be bent along the shape of the molding surface of the mold, but the device described in the above reference is sufficient to handle cases where the sheet length and product length are not the same. I can't say it's possible.

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a fender liner stamping molding apparatus that does not cause thin walls and wrinkles in molded products.

[Means for solving problems]

The fender liner stamping molding device of the present invention includes:
In a stamping molding machine that clamps and molds a resin sheet that has been clamped and conveyed by a sheet clamper, it is clamped and molded by a preceding ramp, and has a central clamp that can move to and hold the sheet clamper while holding the sheet, and a clamp that clamps the sheet. The sheet clamper is characterized in that it is equipped with a leading ramp consisting of three movable clamps, clamps at both ends, which can be rotated and held toward the sheet clamper using the central end as a fulcrum.

It is preferable that the leading lamp in the center can be moved to any position up to 50 mm toward the sheet clamper and held at that position.

The leading lamps at both ends can be rotated by any angle up to 20@ towards the seat clamper using the central end as a fulcrum.
It is preferable that the position can be maintained.

[For production]

As described above, the present invention consists of three movable clamps for the first ramp, and the central clamp can move to the sheet clamper side and hold the sheet while holding it, and the clamps at both ends can hold the sheet while holding it. The center end can be used as a fulcrum to rotate and hold the fender liner toward the seat clamper, so the longest part of the fender liner should correspond to the fulcrum of the clamps at both ends, and the center clamp can be moved toward the seat clamper and held. When the clamps on both sides are rotated and held toward the sheet clamper using the center end as a fulcrum, the width adjustment amount of the sheet is adjusted.
The degree of elongation of each part of the sheet during molding is approximately the same, and the fender liner can be molded without producing thin parts or wrinkles.

〔Example〕

The present invention will be explained by way of one embodiment with reference to the drawings.

As shown in FIG. 1, which shows the stamping molding apparatus of the present invention, a continuous resin sheet extruded from a T-die of an extruder is cut into a certain length, and both ends of a resin sheet 1 are clamped by a sheet clamper 2. , then resin sea)
1 is brought closer to the width and transported into the molding machine. In order to prevent the resin sheet 1 from being pulled during molding, the inside of the portion of the resin sheet 1 clamped by the sheet clamper 2 is further clamped by a movable lamp, that is, a clamp 3b in the center and clamps 3a and 3c at the ends. do. The movable and clamping mechanisms of the first lamp are omitted in FIG. 1, but as shown in FIG. 2, the central clamp 3b is attached to the resin sheet 1.
a clamping hydraulic cylinder 7b for clamping the
Hydraulic cylinder 6b for movement to move the entire body up to 50 mm to the seat clamper side and hold it in any position.
The end clamps 3a and 3c are provided with clamping hydraulic cylinders 7a and 7C for clamping the resin sheet 1, respectively, and a maximum of 20'' toward the sheet clamper 2 side about the fulcrums 8a and 8C at the center end. Rotate until
Hydraulic cylinders 8a and 8C for holding at any angle
It is equipped with Next, as shown in FIG. 3, the center clamp 3b is moved toward the sheet clamper while holding the resin sheet and held in that position, and the end clamps 3a
and 3c are rotated toward the sheet clamper around the fulcrums 8a and 8C at the central end while holding the resin sheet, respectively, to maintain the angle, and partially change the amount of width shifting. Combine mold 4 and lower mold 5 and seal with resin) 1
After pressing and cooling, the mold is opened by opening the first ramp, that is, the central clamp 3b and the end clamps 3a and 3c, and returning to the original position. The molded resin sheet is conveyed to the next trimming process while being clamped by the sheet clamper 2, and is trimmed to obtain a fender liner.

〔Effect of the invention〕

The fender liner stamping molding device of the present invention includes:
Since it is equipped with a ramp consisting of three movable clamps, it is possible to make the stretch of each part of the resin sheet the same by partially changing the width of the resin sheet. - The liner can be molded.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a stamping forming apparatus according to an embodiment of the present invention, Fig. 2 is a top view of a lamp that is performed before an embodiment of the present invention, and Fig. 3 is after width adjustment of an embodiment of the present invention. FIG. 4 is a perspective view of a conventional stamping forming apparatus; FIG. Ja) and b) are side views of a conventional lamp, and FIG. 6 is a perspective view of a resin sheet molded according to the prior art. In the figure, l... Resin sheet 2... Sheet clamper 3
a, 3c...End clamp 3b...Central clamp 4...Upper mold 5...Lower mold ea, 13
b, 8c... Hydraulic cylinders 8a, 8c... Fulcrum Patent applicant Toyota Motor Corporation agent Patent attorney Yumi Kaede (and 2 others) Figure 1 Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] In a stamping molding machine that clamps and molds a resin sheet that has been clamped and conveyed by a sheet clamper, it is clamped and molded by a preceding ramp, and has a central clamp that can move to and hold the sheet clamper while holding the sheet, and a clamp that clamps the sheet. This fender liner stamping molding device is characterized in that it is equipped with a leading ramp consisting of three movable clamps, clamps at both ends, which can be rotated and held toward the seat clamper using the central end as a fulcrum while the fender liner is still in place.