Method for the production of heat and/or fluid exchangers that c

Details Method for the production of heat and/or fluid exchangers that c Method for the production of heat and/or fluid exchangers that c

1985-07-02

1988-04-26

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

165148, 249 63, 249122, 249145, 249177, 264254, 264263, 264277, 264279, 2642791, 26432816, 264DIG65, 425117, 425123, 425468, 425577, B29C 4514, B29C 4573, B29C 6502

Patent

active

047403446

ABSTRACT:
The invention comprises a method and apparatus wherein an insert, preferably made of plastic and preferably allowing a melt-on bonding with the tubes and whose floor has a traversing opening for each tube, is inserted into the first part of the injection mold (top mold or bottom mold) as a positioning element for the tubes in such a manner that the insert is at least partially locked or secured into the first part of the injection mold. A tube is then placed in each opening of the insert. A mandrel is then placed in each tube, whereupon the injection mold is locked in such a manner that, if necessary, the mandrels are locked into the second part of the injection mold (bottom mold or top mold). A molten thermoplastic material is then injected, via a sprue provided in the injection mold, into a cavity formed by the injection mold, the insert and the tube ends. The parts of the injection mold are separated after cooling of the thermoplastic material, which is maintained under pressure during the cooling at least initially. The mandrels are then removed and the tubes bonded to the insert by the thermoplastic material are removed from the first part of the injection mold and, if appropriate, the free ends of the tubes are also bonded to a second insert by means of the injection mold.

REFERENCES:
patent: 3471178 (1969-10-01), Roe
patent: 4352772 (1982-10-01), Bezner

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