Coffee cup lids are most challenge for all
thermoforming technology without
cutting offset,especially for PP material,
At the state of the art, various types of thermoforming presses have already been proposed, which are equipped with mutually engage and disengage male and female moulds with mutual frontal opening-closing movement for the extraction of the thermoformed objects.
The sheet Transport is effected by the Double-Link feed chains, furnished with ground pointed teeth, designed to “Prick” the sheet. In order to prevent the sheet becoming overheated, whilst in the “Pricking” area, this zone is provided with water cooled cover strips. The “drive” is obtained from a Geared Servomotor directly mounted on input shaft. The setting of the length of the sheet feed is affected by PLC.
The pick and place robot unit is mounted directly behind the forming station to punch the holes in the lids. The articles are ejected by the mould directly on the mandrel of the robot. Vacuum keeps the articles on the mandrels of the index plate. Every cycle the index plate turns 90° counter clockwise.