Injection mouldings with improved surface characteristics - by inserting a laminated foil into the mould prior to moulding

In the parent patent, a heated flat thermoplastics foil is placed between 2 half-moulds defining a cavity and deformed by injecting an expansible thermoplastics, contng. a foaming agent, into the non-gas tight mould. The present patent provides a foil which is a laminate, in which the layer nearest...

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Bibliographic Details
Main Authors NICKOLAUS,WILHELM, STANGE,KARL,.DR, HOFMANN,ALFRED, NEHRIG,JUERGEN, KOENIG,ULRICH,.DR
Format Patent
LanguageEnglish
German
Published 27.02.1975
Edition2
Subjects
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
DECORATIVE ARTS
MOSAICS
PAPERHANGING
PERFORMING OPERATIONS
PRODUCING DECORATIVE EFFECTS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TARSIA WORK
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Summary:In the parent patent, a heated flat thermoplastics foil is placed between 2 half-moulds defining a cavity and deformed by injecting an expansible thermoplastics, contng. a foaming agent, into the non-gas tight mould. The present patent provides a foil which is a laminate, in which the layer nearest the gate side of the tool comprises a thermoplastics which is compatible with the expansible material. Mouldings with superior surface characteristics are obtd. more economically than by prior-art spraying, painting or glueing.
Bibliography:Application Number: DE19732341060