Screw in-line type injection molding method and apparatus for low-pressure injection molding
US4435142A · kind A · utility
7Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Jun 9, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A low-pressure screw in-line type injection molding method and apparatus for use with materials such as urea mixed resin powder are disclosed. The initial injection is performed at a converted injection pressure in the range of 250-700 Kg/cm.sup.2 and at an injection velocity in the range of 30-50 mm/sec. When the mold cavity has become nearly completely filled, the converted injection pressure is lowered to 50-200 Kg/cm.sup.2 for the completion of the injection cycle under low pressure conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.