Honda Motor Co., Ltd.

Solize Corporation

Sankei Giken Kogyo Co., Ltd.

Ryota Masuda

Hiroyuki Ikeno

Kazuo Igarashi

Kohei Mutai

Daisuke Sato

Hajime Kawamura

Satoru Nishimoto

Takashi Inomata

A method of manufacturing a resin formed product having a leather grain includes: a 3D printing step of inputting printing data to a 3D printer, and printing an intermediate product having an intermediate grain that is a base of the leather grain; and a post processing step of obtaining the resin formed product, which is a finished product, by carrying out post processing on the intermediate product printed in the 3D printing step. A grain height in input data, which is the printing data inputted in the 3D printing step, is greater than or equal to 120% of a stacking pitch in the 3D printing step.

Method of manufacturing resin formed product having a leather grain

A method for producing a resin sintered bodyby applying an inkto thermoplastic resin powderand sintering the powder, the method including the step of immersing an intermediate resin sintered body, which has an unevenly colored region on the surface thereof and the whole of which has been already sintered, in a surface treatment liquid containing sulfuric acid and chromic anhydride, in which the concentration of chromic anhydride is 300 g/L or more, for 5 minutes or longer. When producing a resin sintered body by sintering thermoplastic resin powder, the surface of the resin sintered body can be evenly and sufficiently colored to an extent required without an unevenly colored region on the surface thereof, and also the surface of the resin sintered body can have a good appearance and smoothness.

Method for producing resin sintered body

Growing community of inventors

Tokyo, Japan

Ryota Masuda