Method and apparatus for closing tool of plastics processing machine
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United States of America Patent
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Feb 24, 1998
Grant Date -
N/A
app pub date -
Apr 24, 1996
filing date -
May 3, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for closing the tool of a plastics-processing machine, especially a blow-molding machine, concerns a two-part tool (1, 2) which is supported by two tool mounting plates (3, 4), at least one run drive (5), at least two closure drives (8), and such that the closure drives (8) each have a hydraulic piston-cylinder system with a cylinder (9), a piston (10), and a cylinder rod (11), and such that an inflow (14) and an outflow (15) for hydraulic oil is situated at the cylinder (9). Also, the end of the piston rod (11) has an interlock element (12) which interacts with a counter-piece (13), such that the piston rod (11) does not interlock with the closure piece (13), in order to apply the closure force, until the tool (1, 2) is situated near its closed position. According to the invention, all the closure drives (8) for closing the tool (1, 2) with a high force are actuated by a common control or regulation mechanism; no synchronization devices between the individual closure drives 8 are present. The entire closure motion of the tool (1, 2) takes place continuously and without interruption of the closure process. In this way, a more economical mode of operation is achieved by a simpler and more economical design.
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