PROCESS AND EQUIPMENT FOR MANUFACTURING A PLASTIC HOLLOW BODY FROM TWO SHEETS

摘要

Process for manufacturing a plastic hollow body by moulding two sheets of molten plastic in a mould comprising two cavities, said process comprising the following steps: a) two molten plastic sheets are manufactured by extrusion of at least one stream of molten plastic and transverse cutting thereof; b) these sheets are introduced between the mould cavities; c) the mould is closed and the hollow body is manufactured by conforming the two sheets to the mould cavities; d) the hollow body thus obtained is removed from the mould; e) all of operations a) to d) are repeated in order to manufacture another hollow body from two new sheets, characterized in that: before, during or after the transverse cutting operation, the lower portion of the two new sheets is cooled using a specific device that makes possible a local cooling of the sheets in said lower portion.