Apparatus and methods for immersed-head cutting of thermoplastic

Details Apparatus and methods for immersed-head cutting of thermoplastic Apparatus and methods for immersed-head cutting of thermoplastic

1984-07-03

1986-02-11

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

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

To form particulate product

833563, 83675, 83913, 425311, B29C 4712

Patent

active

045698104

ABSTRACT:
Apparatus for cutting thermoplastic filaments or rods with multiple blades in a granulation head of the type which is completely immersed in a cooling liquid, the blades acting with an extrusion die having extrusion orifices arranged in one or more rings centered on the axis of the die and coaxial with a rotary cutting means carrying cutting blades, wherein the cutting blades have an extrados surface inscribed within a regular convex polygon having an apex angle of 7.degree. or less and an intrados surface having a point of inflection situated at a distance between one quarter and one half of the width of the blade, the remainder of the intrados beyond the inflection point having a profile pattern similar to that of the extrados, and methods for chopping thermoplastics with such apparatus.

REFERENCES:
patent: 3196487 (1965-07-01), Snelling
patent: 3292212 (1966-12-01), Pomper
patent: 3308507 (1967-03-01), Black
patent: 3792950 (1974-02-01), Cuff
patent: 4123207 (1978-10-01), Dudley
patent: 4179255 (1979-12-01), Hale
patent: 4251198 (1981-02-01), Altenburg

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