JPH04800Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to trim corners used in chairs, car seats, etc. made of polyvinyl chloride (PVC) leather.

(Prior art) Recently, a grain pattern has been engraved on the outer circumferential surface of a round shaft head (hollow or solid) with a foot band piece made by extrusion molding of plastic such as polyvinyl chloride (PVC). Trim corners with a grain pattern formed by coining (embossing) with a coining roll are generally known.

(Problem that the invention aims to solve) However, in the conventional trim corner, the coining roll for grain pattern coining processing was a heater roll type with a built-in heater and was an indirect heating method, so the round shaft head The grain pattern attached to the outer circumferential surface of the material was shallow and indistinct, making it impossible to obtain a delicate and precise pattern, and the grain pattern easily disappeared when it came into contact with other objects.

(Means for Solving the Problems) This invention was made to solve the above problems, and is constructed as follows.

This devised trim corner will be explained in detail below with reference to the drawings. First, 2 is a round shaft head with an integral foot band piece 1 made of extrusion molded plastic material such as synthetic resin, and the outer circumferential surface of the round shaft head 2 is It is made by adding a clear and severe grain pattern 3 by coining with a flame roll.

In addition, FIGS. 1 and 3 illustrate the case where the round shaft head 2 is a hollow shaft, and FIG. 2 illustrates the case where the same (real) shaft is used.

Next, to briefly explain this devised trim corner with reference to the processing process explanatory diagram in Fig. 4, the extruded and cooled foot band piece 1 is integrated into the round shaft head 2.
Immediately before entering between a pair of left and right rolls 4, 4 each having a grain pattern 5 engraved on its initial outer peripheral surface, the material is softened by being exposed to combustion flames 10, 10 from burners 9, 9 from the left and right sides, respectively. Then, by passing between the left and right rolls 4, 4, the first roll coining process is performed, and a deep grain pattern 3 is provided on both left and right sides of the round shaft head 2, respectively. Then, immediately before entering between the upper and lower rolls 6 and 7 that form a pair, the lower roll 7 has a circumferential groove 8 through which the foot band piece 1 is inserted, and the upper roll 6 has a grain pattern 5 engraved on the outer peripheral surface. , the combustion flame 10 of the burner 9 is applied from above to soften the material. Then, the next roll coining process is performed by passing between the above-mentioned upper and lower rolls 6 and 7.
A deeply textured pattern 3 is engraved on the remaining upper outer surface of the round shaft head 2, and the deeply textured pattern 3 is clearly attached to the entire outer circumferential surface of the round shaft head 2 and is sequentially rolled out.

(Effects of the invention) The trim corner of this invention has a clear and deep grain pattern 3 created by a flame patch roll coining process on the outer circumferential surface of the round shaft head 2 with which the foot band piece 1 is integrated. It is possible to express a deep and clear grain pattern 3, which is delicate and precise, and has excellent effects such as significantly improving decorativeness and commercial value, and preventing the grain pattern from disappearing when it comes into contact with other objects. .

[Brief explanation of drawings]

The drawings show examples of this devised trim corner. Figure 1 is an enlarged front view of a hollow round shaft head, Figure 2 is an enlarged front view of a hollow round shaft head, and Figure 3 is an enlarged front view of a hollow round shaft head. The perspective view of the figure and FIG. 4 are explanatory diagrams of main parts of the manufacturing process. 1... Foot band piece, 2... Round shaft head, 3... Severe grain pattern, 4... Roll, 5... Grain pattern, 6...
Upper roll, 7...lower roll, 8...peripheral groove, 9...
Burner, 10...flame.

Claims (1)

[Scope of utility model registration request] This trim corner is formed by laying a clear and severe grain pattern 3 by stamping with a flame patch roll on the outer circumferential surface of a round shaft head 2 integral with a leg band piece 1 made of extrusion molding of plastic such as synthetic resin.