Method of manufacturing core, method of manufacturing trim, and core manufactured by the same

Abstract

The present invention may make it possible to efficiently form reinforcing deformed portions in a core buried in the trim, and may make it possible to sufficiently secure the rigidity of the core, the rigidity based on reinforcing deformed portions. The method of manufacturing an elongated core which is buried in an elongated trim. A longitudinal direction of the elongated core is a first direction and a width direction of the elongated core is a second direction, the method comprises: the slit forming being performed by supplying an elongated strip-shaped metal plate to between a pair of slitter rollers engaged with each other, forming slits, which extend in the second direction in a state in which the slits are not formed to a portion of the strip-shaped metal plate in the second direction, at predetermined intervals in the first direction so as to form the core pieces between the adjacent slits; and the rolling being performed by supplying the strip-shaped metal plate having the slits formed therein to between a pair of rolling rollers, rolling the portion of the strip-shaped metal plate in which the slits are not formed in the second direction to form a rolled portion extending in the first direction, and expanding the slits in the first direction to form the spaces, and supplying the primary core to between a pair of deformed portion forming rollers engaged with each other such that reinforcing deformed portions extending in the second direction are repetitively formed in the first direction, wherein the convex and concave deformed portions are alternately formed in the first direction, and wherein the convex and concave deformed portions are formed so as to be continuously S-shaped in a cross section along the first direction.

Description

technical field [0001] The present invention relates to a method for manufacturing a long core material embedded in a long decorative strip made of a polymer material, a method for producing a decorative strip, and a core material. Background technique [0002] Generally, on the flanges of the door opening edges of vehicles such as automobiles and the opening edges of trunks and hatchbacks, a long decorative strip along the flanges is attached. The decorative strip is extruded into a shape having a substantially U-shaped mounting portion in cross section using polymer materials such as rubber, thermoplastic synthetic resin (including thermoplastic elastomer), and by using the substantially U-shaped mounting portion Fix to the flange by clamping the flange of the opening edge from both sides. Such a decorative strip is installed as follows: a long reinforcing core material (for example, a core material formed of a strip-shaped metal plate such as a cold-rolled steel plate) h...

AI Technical Summary

Problems solved by technology

[0006] However, in the case of punching and forming gaps (or slits) on a strip-shaped metal plate by press working, the punched out par

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