Vacuum forming glass sheets
Vacuum forming glass sheets
Keyword: Glass
Applicant: Glasstech, Inc., Perrysburg, USAPatent number: US5,951,733Publication date: 14 September 1999Title: Mold apparatus and method for vacuum forming glass sheets
This invention relates to mold apparatus and a method to provide improved glass sheet vacuum mold forming apparatus. The glass sheet vacuum mold forming apparatus of the invention includes a mold having a curved forming face and a vacuum chamber in which a vacuum is drawn. The vacuum chamber is connected to the forming face by interconnecting holes, to vacuum form a heated flat glass sheet on the forming face. A vacuum impulse distributor of the apparatus includes a vacuum impulse chamber in which a vacuum impulse of at least 0.1 atmospheres of vacuum is generated from a valved vacuum reservoir. A plurality of tubes extend from the vacuum impulse chamber of the vacuum impulse distributor to a limited number of holes in the forming face to provide a vacuum impulse that assists in the forming of the glass sheet.
