Injection molding method for a semifinished product
US11389995B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2020 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Feb 6, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/14131
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molding method for a semifinished product includes a semifinished product emplacement step, a semifinished product pre-compression step and a forming step. First, a pair of mold with a forming space is provided. A semifinished product is put into the mold, and a first joint is performed to the mold by a press-fit jig, fixing the semifinished product in the forming space. The semifinished product is also tightly fitted with the mold. Next, a first open-die is performed and the press-fit jig is removed. After that, a second joint is performed, and a forming material is injected into the forming space. Finally, a second open-die is performed, and then a finished product is formed. By the semifinished product pre-compression step, the forming material can be prevented from resulting in spill or burr on the semifinished product, thereby improving the yield of injection molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.