Mould for the rotational moulding of plastic materials
US9352497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2015 |
| Grant date | May 31, 2016 |
| Priority date | — |
| Expiry date | Jun 26, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C41/52
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A mold for the rotational molding of manufactured articles of plastic material includes two half-molds, one of which is provided, on its surface, with an insert-holding device comprising a rod with a first end passing through the wall of the half-mold at a respective passage channel and axially movable for projecting inside the mold. The mold also comprises a first pneumatic circuit able to apply a predetermined pressure, positive or negative, inside the mold. At least one insert-holding device is operatively connected to a second pneumatic circuit able to apply a predetermined pressure, positive or negative, and is internally provided with a plurality of means to apply the predetermined pressure at the passage channel, so that at the insert-holding device the same predetermined pressure value which generates inside the mold by the first pneumatic circuit is applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.