Injection molding method
US10464246B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Apr 20, 2015 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection molding method includes: a plasticizing process of feeding a resin pellet and additive components to a heating cylinder including a screw that can rotate around a rotation axis and can advance and retreat along the rotation axis, and generating molten resin by rotating the screw in a normal direction; and an injection process of injecting to a cavity the molten resin containing the additive components. In the plasticizing process, retreat operation of forcibly retreating the screw is performed at a predetermined velocity by a predetermined stroke or a predetermined time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.