公开(公告)号：US3904338A

公开(公告)日：1975-09-09

申请号：US42967673

申请日：1973-12-28

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： STRAUMANIS MARIS

IPC: B29C47/00 ,  B29C47/92 ,  B29C69/02 ,  G05D5/03 ,  B29D7/22

CPC classification number: B29C47/92 ,  B29C47/00 ,  B29C47/0021 ,  B29C47/0038 ,  B29C47/004 ,  B29C47/0054 ,  B29C2947/92085 ,  B29C2947/92152 ,  B29C2947/92438 ,  B29C2947/9258 ,  B29C2947/9279 ,  B29C2947/92933 ,  G05D5/03 ,  B29C51/00

Abstract: An extruder continuously forms a sheet that is intermittently supplied to an intermittently activated, in-line processing station, e.g., a thermoformer. The sheet is supplied to the processing station via a variable accumulator that is adapted to have a rest state immediately prior to the sheet being supplied to the processing station. The extruder includes a screw for feeding material to sheet forming dies at a mouth of the extruder, as well as rolls for taking the sheet material away from the extruder mouth. The rest state time is measured to derive an indication of the take-away speed of the sheet from the mouth relative to the speed with which the sheet moves through the intermittently activated processing station. The activation rate of the processing station is measured, as is the thickness of the sheet after it has reached a set state, prior to passing through the accumulator. In response to the three measurements, the screw and line speeds are controlled so that the sheet thickness is maintained approximately at a setpoint value, and sufficient material is always available to the processing station, and excess material is prevented from piling up at the accumulator.

Abstract translation: 挤出机连续地形成间歇地供应到间歇激活的在线加工站，例如热成型机的片材。 纸张通过可变累加器提供给处理站，该变量累加器适于在将纸张提供给处理站之前立即具有休息状态。 挤出机包括用于将材料供给到挤出机口部的成型模具的螺杆，以及用于将片材从挤出机口取出的辊。 测量休息状态时间以导出片材从口部相对于片材通过间歇激活的处理站移动的速度的取出速度的指示。 在通过蓄电池之前，测量处理站的激活速率以及片材在达到设定状态之后的厚度。 响应于三次测量，控制螺杆和线速度，使得板厚度保持在大约设定点值，并且足够的材料总是对加工台可用，并且防止多余的材料堆积在蓄压器上。