CONTINUOUS SHEET FORMING DEVICE

摘要

PURPOSE:To improve eht efficiency of the title device by a method wherein the transfer and application of continuously delivered heat softening state stock sheet to sheet forming devices are done with a vacuum suction pad. CONSTITUTION:Thermoformable material sheet S with the predetermined thickness and width is continuously extruded from a die 2, past through the rollers of a sheet thickness control roller pair 3 and on sheet intermediary conveying rollers 4 and between the fixed blade and movable blade of a sheet cutting device 5 and transferred onto the top surface of the belt 7 of a conveying device 6 so as to be conveyed forward at the speed same as the delivery speed in flat state without being stretched and un-uniformly thicknessed. Every detection of the attainment of the length of the portion of the sheet on the device 6 side to the predetermined linear dimension by a sensor or every elapse of the predetermined period of time set at a timer circuit causes the device 5 to intermittently actuate so as to cut off said portion of the sheet from the following portion of the sheet as a cut-to-specified length sheet. A vacuum suction pad 11 is shifted between the conveying device 6 and vacuum forming devices 8, 9 and 10 in order to transfer the cut stock sheet on the conveying device 6 to each vacuum forming device by holding the sheet under vacuum suction.