Methods and apparatuses for injection molding walled structures
US10899053B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2016 |
| Grant date | Jan 26, 2021 |
| Priority date | — |
| Expiry date | Mar 10, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/7544
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process is provided for making a walled structure using an injection molding apparatus. The apparatus has a molding space formed between a mold cavity and an inner core disposed within the mold cavity. The molding space defines a shape of the structure. The process includes injecting molding material into the molding space, moving or retaining a portion of a movable impression member protruding from the inner core within a portion of the molding space so as to create a recess within an inner wall of the structure, and retracting the impression member into the inner core such that the impression member is cleared from the molding space. Precision control in forming the impression member is provided by a closed-loop configuration using a sensor that measures a molding space parameter (e.g., temperature), optionally in combination with a servo drive for activating the impression member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.