Process for producing a tube sheet

Details Process for producing a tube sheet Process for producing a tube sheet

1990-10-31

1992-10-27

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

264154, B29C 3700

Patent

active

051587297

ABSTRACT:
In a process for fabricating an injection-molded tube sheet of thermoplastic material, for use in an apparatus for transferring heat and/or mass, with at least 25 through-holes for taking up tube ends, a melt is first distributed in the injection mold over the entire cross-sectional area before being pressed into the region of the mold where the tube sheet proper is formed. The injection mold has a needle disposed therein for each hole of the tube sheet being fabricated. After cooling, the portion of the thermoplastic melt without through holes, that is that overlaying the needles, is removed to produce the tube sheet.

REFERENCES:
patent: 2883704 (1959-04-01), Jurgeleit
patent: 3228876 (1966-01-01), Mahon
patent: 3459622 (1969-08-01), Fisher
patent: 3751545 (1973-08-01), Peeso, Jr. et al.
patent: 4588543 (1986-05-01), Huebner
patent: 4740344 (1988-04-01), Wollbeck et al.
patent: 4790372 (1988-12-01), Gemeinhardt et al.
J. D. Robinson, "Gating and Cooling Techniques for Polypropylene" Plastics, Aug., 1965, pp. 47-51.

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