초록 ▼

A process is disclosed for manufacturing thin-walled moldings with a ground layer (4) made of thermoplastic materials and a covering layer (5) made of prefabricated flat covering materials pressed together with the ground layer by a back pressing technique in a form tool (8) having a top die (6) and

A process is disclosed for manufacturing thin-walled moldings with a ground layer (4) made of thermoplastic materials and a covering layer (5) made of prefabricated flat covering materials pressed together with the ground layer by a back pressing technique in a form tool (8) having a top die (6) and a bottom die (7). The object of the process is to produce thin-walled moldings having laminated and non-laminated areas in a simple manner, with no danger of damaging sensitive covering layer materials and with non-laminated areas having a high quality surface. For that purpose, during or after back pressure lamination, while or after the two dies are closed, besides at least one molding area (2) laminated with a covering layer by a back pressing technique, at least another area (3) of the molding is produced by injection molding thermoplastic material in the part of the molding cavity (17) in which the area of the molding which is not laminated with a covering layer (5) is produced.

대표청구항 ▼

[ We claim:] [1.] A method of making a thin-wall molding comprising the steps of:(a) depositing a base layer of a thermoplastic material on a lower mold half;(b) applying a prefabricated flat covering material as a cover layer to an upper mold half;(c) closing said upper mold half onto said lower mo

[ We claim:] [1.] A method of making a thin-wall molding comprising the steps of:(a) depositing a base layer of a thermoplastic material on a lower mold half;(b) applying a prefabricated flat covering material as a cover layer to an upper mold half;(c) closing said upper mold half onto said lower mold half to press said base layer onto said cover layer and bond said layers together into a laminate while defining between said upper and lower mold halves a mold cavity having a portion extending beyond said laminate;(d) separating said portion of said mold cavity from said laminate with a tongue on one of said mold halves extending into a groove in the other of said mold halves;(e) withdrawing said tongue from said mold cavity and said groove; and(f) thereafter injecting thermoplastic material into said portion of said mold cavity for bonding with said laminate.