Molding apparatus having an improved fastening means of the peripheral dies to the core
US6280174A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Nov 5, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/778
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molding apparatus includes a core (3) and a female mold member (4) as well as wraparound peripheral dies (7), which are attached to the core for movement in a closing direction and completely surround the core (3). In the region of the impact areas of the peripheral dies (7) upon the female mold member (4), the impacting surfaces are configured complementary, for example planar. Each peripheral die (7) is attached laterally to the core by at least one spacer and retaining element (8, 10), with the spacer element (8) having a width which is slightly greater than a cross section of the peripheral die, so that a small gap (9) is formed between confronting surfaces of the peripheral dies and the core. The fixed tolerance gap offers the advantage that constant, minimum frictional conditions exist. The lateral attachment facilitates the replacement of individual peripheral dies (7) and temperature-based dimensional changes of the core (3) are followed by the peripheral dies, without risk of jamming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.