Injection moulding control
US3976415A · kind A · utility
17Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1973 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Nov 5, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/80
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection moulding machine used in conjunction with a closed split mould, has its shot volume controlled by a device which responds to widening of the mould parting line occurring when the mould is completely filled with moulding material as a result of the pressure build up which occurs inside the mould. Contactless sensing of widening of the parting line is described, by means of electromagnetic sensing devices. The shot volume can thus be held at the optimum value at which minimum flash occurs and complete filling of the mould is assured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.