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Patent Searching and Data


Title:
DOOR PILLAR FOR CAR, AND METHOD FOR MANUFACTURING DOOR PILLAR
Document Type and Number:
WIPO Patent Application WO/2016/143990
Kind Code:
A1
Abstract:
The present invention relates to a door pillar for a car, and more specifically to a door pillar for a car that is manufactured using a synthetic resin so as to be able to reduce the weight as well as improve workability. A door pillar for a car according to the present invention comprises a body member and a wing member. The wing member provides: a bracket part on which a through-hole for being fixed to the car body using a screw is formed, and a protrusion that can be inserted into the car body so as to fix the position of the through-hole; and a guide rail that is coupled to one side of the body member such that a car window can slide is formed. The body member and the wing member are injected using a synthetic resin and integrally formed. Moreover with respect to the door pillar for a car, the wing member preferably has a plurality of injection holes formed along the length direction so as to prevent distortions in the size when injecting the synthetic resin. According to the present invention, the body member and the wing member are integrally formed of synthetic resin, and thus the manufacturing process for the door pillar for a car is simplified and furthermore the weight of the door pillar can be reduced. More specifically, the objective of the described method for manufacturing a door pillar for a car according to the present invention is a method for manufacturing a door pillar for a car by manufacturing by injection using poly(methylmethacrylate) so as not to require a coating process. The method for manufacturing a door pillar for a car according to one aspect of the present invention comprises a drying step, an insertion step, a heating step, a measurement step, an injection step and a cooling step. The drying step dries poly(methylmethacrylate). The insertion step inserts the poly(methylmethacrylate) dried in the drying step into an injection cylinder. The heating step heats the cylinder into which the poly(methylmethacrylate) is inserted at various different temperatures along the length direction. The measurement step measures the amount of poly(methylmethacrylate) to inject. The injection step injects the measured poly(methylmethacrylate) into a mould at a constant pressure. The cooling step cools at various different temperatures along the length direction relative to the injection holes of the mould into which the poly(methylmethacrylate) is injected. According to the present invention, a door pillar is manufactured by injecting poly(methylmethacrylate) into a mould, wherein the mould is divided into several levels and then the respective levels are cooled differently, and as a result a coating process is not required. Therefore, not only can a manufacturing process for a door pillar be simplified, but also a door pillar can be manufactured in an environmentally-friendly manner since the manufacturing process does not emit any environmental pollutants.

Inventors:
KIM KI IL (KR)
Application Number:
PCT/KR2015/013728
Publication Date:
September 15, 2016
Filing Date:
December 15, 2015
Export Citation:
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Assignee:
KIM KI IL (KR)
International Classes:
B60J5/04; B29C45/72; B29C45/73; B29C45/78
Foreign References:
JP2007302171A2007-11-22
JP2003320904A2003-11-11
JP2007223143A2007-09-06
JP2004216579A2004-08-05
JP2004034856A2004-02-05
Attorney, Agent or Firm:
HAN, Seoung Geun (KR)
한성근 (KR)
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