JPS6220264Y2 - - Google Patents

Description

[Detailed Description of the Invention] In order to adapt the carpet for the automobile floor to the shape of the automobile floor, a protrusion 2 is formed in the center of the carpet 1 as shown in FIG. Therefore, as shown in Fig. 2, this type of carpet has a base fabric 1A covered with a raised layer 1B, and a main body made of polyethylene, polypropylene, etc.
Formability is imparted by forming a thermoplastic synthetic resin layer 1C such as polyvinyl chloride, and a lower mold 3 is provided with a convex portion 3A as shown in FIG. 3 and a shape corresponding to the convex portion 3A. Press molding is performed using a press mold consisting of an upper mold 4 having a concave portion 4A arranged thereon. At this time, in order to support the carpet 1, the periphery of the carpet 1 is supported by support mechanisms such as handles 5, 5 as shown in FIG.
Or support it with the hands of the worker. When supporting the periphery of the carpet 1 in this way, in order to prevent the handle or the operator's hand from getting caught in the press mold, the periphery of the carpet 1 is made to protrude a large width from the press mold, and a support width 1D, 1D must be provided. The support allowances 1D and 1D are cut and discarded after molding.

The purpose of the present invention is to eliminate the large support allowance required in the above-mentioned conventional technology, to save materials, and to reduce the cost by simplifying the structure of the press molding die. The main idea is to attach a clamping piece to the peripheral wall of the press mold.

The present invention will be explained with reference to an embodiment shown in FIG.
A plurality of clamping pieces 4B are attached to the peripheral wall 41 of the upper die 4 by bolts in a press molding die consisting of a lower die 3 into which B is inserted and an upper die 4 having a concave portion 4A having a shape corresponding to the convex portion. Install it vertically. A predetermined gap 6 is formed between the inner surface of the holding piece 4B and the circumferential wall 31 of the lower die 3 for inserting the circumferential edge of the carpet 1 therein. In order to mold the carpet 1 using the press mold described above, the carpet 1 is heated and the thermoplastic synthetic resin layer 1 is formed in advance.
After C is softened, it is placed on the lower mold 3 with the surface facing up as shown in FIG. When the upper mold 4 is lowered in this state, the peripheral edge of the carpet 1 is automatically inserted into the gap 6 between the peripheral wall 31 of the lower mold 3 and the inner surface of the clamping piece 4B of the upper mold 4, as shown in FIG. Go,
Furthermore, the carpet 1 is press-formed as shown in FIG. 7 by the downward pressure of the upper mold 4. At this time, since the convex part 3A of the lower die 3 fits into the concave part 4A of the upper die 4 via the carpet 1, the carpet 1 is pressed and pulled inward by the convex part 3A. However, since the circumferential edge of the carpet 1 is only inserted into the gap between the inner surface of the clamping piece 4B of the upper die 4 and the circumferential wall of the lower die 3, the circumferential edge of the carpet 1 is forced into the gap 6 in response to the tensile force.
The carpet 1 can be moved slightly while being held in place, and the carpet 1 can be prevented from being torn. The carpet 1 is thus formed as shown in FIG.

In the present invention, the peripheral edge of the carpet is automatically inserted into the gap between the lower mold peripheral wall and the clamping piece as the upper mold descends, and is therefore clamped. There is no need for any effort, and all you have to do is leave a small amount of scissors around the edge of the carpet.
The carpet material can be saved because it requires only a small width compared to the support width required when supporting the carpet from the outside of a conventional press mold, and there is no need to provide a mechanism to support the carpet from outside the mold, which reduces the mold structure. This makes it more compact and simple. Furthermore, since the peripheral edge of the carpet can shift slightly while being held in the gap between the lower die peripheral wall and the inner surface of the clamping piece, the carpet can adapt to the tensile force that occurs when the convex part fits into the concave part through the carpet. , can prevent tearing during carpet molding.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a molded carpet;
FIG. 4 is a side sectional view, FIG. 3 is a side sectional view of a conventional carpet forming process, and FIG. 4 and subsequent figures show an embodiment of the present invention, in which FIG. 4 is a perspective view, FIG. 5 is a side sectional view showing the state before forming, FIG. 6 is a side sectional view showing the state during forming, and FIG. 7 is a side sectional view showing the state after forming. In the figures, 1... carpet, 2... convex portion, 3...
Lower mold, 31 ... lower mold peripheral wall, 3A ... convex portion, 4
......Upper mold, 41....Upper mold peripheral wall, 4A....concave portion, 4B....clamping piece, 6....gap.

Claims (1)

[Scope of utility model registration request] In a press molding die in which a convex part is arranged on the upper mold or the lower mold and a concave part of a shape corresponding to the convex part is arranged on the lower mold or the upper mold, a clamping piece is hung from the peripheral wall of the upper mold. A press molding mold used for manufacturing a carpet for an automobile floor, characterized in that a predetermined gap is formed between the inner surface of the clamping piece and the peripheral wall of the lower mold for inserting the peripheral edge of the carpet.