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AssigneeKhs Corpoplast GmbH
InventorsMichael Linke, Michael Litzenberg, Rolf Baumgarte, Frank Lewin
Estimating the term…
The process and the apparatus serve for the blow moulding of containers (2). A parison (1) composed of a thermoplastic material is first subjected to heat conditioning along a transport path in the region of a heating section (30). The parison is then subjected to a forming process within a blow mould with exposure to blowing pressure to give heat container. The heat conditioning of the parisons is carried out by a plurality of mutually superposed radiant heaters (41). The blow moulding of the container is followed by wall-thickness measurement at at least one level within the height of the container. The heating power of a radiant heater associated with this height level is controlled. The control system receives a prescribed wall-thickness value as required value and the measured wall thickness as actual value.
A process for blow molding containers, in which a preform made of a thermoplastic material is subjected to thermal conditioning along a conveyance path in a heating line and then molded into a container in a blow mold by the action of blowing pressure, and in which the thermal conditioning is carried out by several radiant heaters arranged one above the other, wherein, after the container (2) has been blow-molded, a wall thickness is measured at at least one height level of the container (2), where the heating capacity of a radiant heater (41) only associated with this height level is automatically controlled, and where the automatic control system is supplied with a preassigned value for the wall thickness as the set point and the measured wall thickness as the actual value.
An apparatus for blow molding containers made of a thermoplastic material, which comprises at least a heating line arranged along a conveyance path of a preform and a blowing station equipped with a blow mold, and in which the heating line has at least one heating element with at least two radiant heaters arranged one above the other, wherein the radiant heaters (41) are connected to an automatic control system, which is connected with at least one sensor (45) for detecting a wall thickness of the container (2), and that the sensor (42) is arranged at a height level that corresponds to a height level of the radiant heater (41), with the incorporation of a stretch factor, which is formed by the ratio of the length of the stretched region of the container (2) to the length of the corresponding region of the preform (1).
Dependencies are inferred from the claim text.