Patent · US Expired

Method of producing an injection moulding tool

US4801068A · kind A · utility

6Cited by

5References

3Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Peter Graczoll · Munich, DE
Franz Gumplinger · Rottenburg am Neckar, DE
Helmut Peuke · Hohentann, DE
Gerd Riedel · Munich, DE

Key dates

Filing date	Sep 14, 1987
Grant date	Jan 31, 1989
Priority date	—
Expiry date	Sep 14, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C45/7312
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

An injection moulding tool with optimum temperature distribution as the result of an improved tempering duct system is obtained if the tool inserts (10, 11) are each made up of two or more plates, tempering ducts (12, 12', 12") are worked in from the external faces (F1, F2, F3), on which the parts are subsequently joined by the diffusion welding method. An injection moulding tool for VHS reel hubs produced by this method produces moulds for injection moulding with substantially reduced wobble and a reduced cycle time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.