| 摘要 |
1,052,473. Bending glass sheets. LIBBEYOWENS-FORD GLASS CO. Nov. 27, 1963 [Dec. 3, 1962], No. 46839/63. Heading C1M. Glass sheets moved along a predetermined path from a heating area, through a bending area, where the glass is pressed to desired shape, to a chilling area, are subjected, after bending but before moving on to the chilling area, to streams of cooling fluid directed against opposite surfaces to set the sheet and prevent deformation on moving. The sheet 11 is received from the heating section on to the horizontal run of a conveyer 27 which may be in the form of a wide flexible belt or a series of narrow bands, the belt or bands being held taut by a spring-pressed idler roller 77<SP>1</SP> and being driven by a roller 74<SP>1</SP>. The sheet is conveyed between the upper and lower mould parts 24, 25 and positioned against stops 112. The lower mould part 25 which is of open - ring type, is raised by the cam 53 to press the sheet against the part 24. If a wide belt 27 is used, it is stopped during the pressing operation; alternatively, if narrow bands are used, the surface of the part 25 is slotted. During the lowering of the part 25, cooling air is discharged against the sheet, to set it sufficiently to prevent sagging, from pipes 104 beneath the sheet and from a pipe 107 carried by an arm 108 and traversed across the upper face of the sheet. When the belt returns to normal position or the sheet is deposited on the bands, the conveyer and the first rolls 20 of the tempering section are speeded up, the stops 112 having been withdrawn, to deliver the sheet rapidly, after which they are decelerated and the parts returned to their positions to receive another sheet. |
