Process and apparatus for bending plastic pipe

Details Process and apparatus for bending plastic pipe Process and apparatus for bending plastic pipe

1993-11-09

1995-04-18

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264322, 264339, 264345, 264348, B29C 5308

Patent

active

054076137

ABSTRACT:
A bending process including both preliminary and following steps takes place in one apparatus. A plastic pipe (6) is heated to a temperature in which it can be plastically deformed. The heated pipe is thereafter shoved into a pipe-shaped bending channel (27) of a bending tool, with the bending tool comprising two dies (9,10), each respectively defining a groove (14,13) which together form the bending channel. Finally, a cooling agent is allowed to flow through the bent pipe which is still in the bending tool. The thusly cooled pipe is removed from the bending tool after the dies are separated from one another. The apparatus to bend the plastic pipe comprises heating, bending, and cooling stations (1,2,3). The heating station comprises two heating fixtures, and the cooling station comprises a supply line (21,22) with a coupling joint (20) which can be coupled to an end of the pipe.

REFERENCES:
patent: 3753635 (1973-08-01), Barnett
patent: 4747768 (1988-05-01), Crupi

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