Blow mold - contact with an oven for warm of tube sections made of plastic and a transfer device for the transfer of the pipe sections from the furnace, on the blow molding machine

摘要

A transfer arm for a blow molding apparatus of the type in which a cold parison is heated in an oven, and then picked up out of the oven by a transfer arm and carried to a blow molding station at which its bottom is held while the parison is stretched upwardly, and after which the mold closes onto the parison to form a container out of the stretched parison, and after which the transfer arm returns to the oven to pick up another heated parison. In moving through its cycle, the transfer arm is moved vertically to lift and lower the parisons and pivoted about an axis to move between the oven and the molding station. A main double acting piston and cylinder effects vertical movement of the transfer arm. A limit switch associated with the transfer arm limits upward movement thereof at an intermediate height for stretching the parison.