Method and arrangement for cooling an extruded hollow product
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United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Nov 3, 1998
filing date -
Apr 17, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a method and an arrangement for cooling an extruded hollow product. According to the invention, the extruder (1) is provided with means for sucking air through the pipe (2). The air to be sucked is thus in contact with the inner surface of the pipe (2), cooling the pipe from the inside. Therefore the cooling of the pipe (2) can be realized in an efficient and simple manner. By arranging the sucking to occur from the middle of the conical extruder (1), no weld line will be formed in the extruded product, and the extruder (1) can be cooled effectively from the inside. According to the invention, the heat contained by the air that has been sucked through the pipe (2) can also be utilized.
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