초록 ▼

Apparatus and a process for manufacturing multiple color thin walled hollow shells for parts such as automobile door panels, controls and instrument panels from dry thermoplastic powders includes a powder box divider to form two or more compartments in a powder charge box and means for joining the c

Apparatus and a process for manufacturing multiple color thin walled hollow shells for parts such as automobile door panels, controls and instrument panels from dry thermoplastic powders includes a powder box divider to form two or more compartments in a powder charge box and means for joining the chrage box divider end-to-end with a mold separation edge on an open-ended heated mold for separating the mold into two or more sections; each compartment of the charge box has a different color powder. The charge box and mold are joined and then are rotated so that the powder is distributed into each mold section by gravity flow with the powder from each section flowing to the divider which separates the colors so as to form two or more tones on a resulting shell of cured material.

대표청구항 ▼

A one-piece integrally cast plastic shell comprising a first thin-walled shell segment formed from cured plastic powder of a first color; a second thin-walled shell segment formed from cured plastic powder of a second color; a heat-fused joint of cured plastic powder integrally connecting said first

A one-piece integrally cast plastic shell comprising a first thin-walled shell segment formed from cured plastic powder of a first color; a second thin-walled shell segment formed from cured plastic powder of a second color; a heat-fused joint of cured plastic powder integrally connecting said first and second shell segments including joint walls that are joined when the shell is fused to form a resultant projection on one side of the shell adapted to be buried in a substrate and to form a sharp radius groove on the other side of the shell for defining a styling transition line between first and second colored panels defined by the first and second shell segments.