Method and apparatus for controlling the temperature of molds, dies, and injection barrels using fluid media
US8501060B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2007 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Feb 9, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76782
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
For controlling temperature in the molding of plastics, metal, ceramic, or die-casting, a circulator supporting a molding machine includes a fixed displacement pump driven by an electronic servo motor for volumetric metering of thermal fluid to or from the molding machine. A pre-set or dynamically controlled volume and flow rate profile matches the heating and cooling requirement of a molding machine and process. Volumetric metering may be based on parameters such as time, machine cycle status, temperature, pressure, and/or flow rate. Fluid may be circulated through the mold at positive or negative pressure at fixed, variable, or pulsed flow. The supply side in a fluid loop may be restricted so as to cause a pressure drop in or upstream of the mold, die or barrel, and seed bubbles may be injected into the fluid flow to excite vaporization and lowering of the fluid temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.