Method and apparatus of injection molding front grill panels of room air conditioner units and the like
US4818462A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Apr 4, 1989 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The front panel of an air conditioner unit or the like, including a louver-like intake grill comprising several transverse slats with outward-upward inclination is formed by injecting molten resin into cavities formed between a stationary mold and a movable mold along a parting line thereof, the molten resin being thus injected through pin-point gates formed on the stationary mold side and tab gates constituting parts of respective cavities and provided on the stationary mold side at part corresponding to the upper edge faces of the slats, the pin-point gates being connected to the upstream parts of the tab gates. By this method and apparatus a high feed rate of the resin is obtainable, and the molding time is shortened without impairment of the aesthetic appearance of the front panel due to unsightly cut marks left by the trimming of the residual sprue resin remaining in the pin-point gates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.