Plastic and nonmetallic article shaping or treating: processes – With step of making mold or mold shaping – per se – Utilizing surface to be reproduced as an impression pattern
Patent
1982-05-10
1984-10-16
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With step of making mold or mold shaping, per se
Utilizing surface to be reproduced as an impression pattern
251208, 26432816, B29C 102
Patent
active
044774044
ABSTRACT:
The process is used for producing grooved plates for adjustable chokes, such plates having a choke groove in one side whose change in cross-section along the length of the groove has to be very true, that is to say, keep to very tight size limits. For producing such grooved choke plates of synthetic resin to accurate size in a mold, the first step is cutting an undersize groove in a plate workpiece to make a positive pattern. The plate workpiece is then placed in a choke housing and the flow properties of the choke are measured. Thereafter, further machining of the plate workpiece is undertaken on the basis of the difference between the desired and the actual choke properties of the plate, and at the same time taking into account shrinkage of the synthetic resin on cooling down and becoming solid in an injection mold which is to be later produced as a negative pattern from the positive pattern. To take into account shrinkage of the synthetic resin material in the injection mold for more complex choke groove forms, the positive pattern is heated after measuring it and before producing the negative pattern sufficiently so that a change in the geometry or form of the choke groove is produced which is truly equal and opposite to the shrinkage of the synthetic resin material.
REFERENCES:
patent: Re28826 (1976-05-01), Ladney, Jr.
patent: 1986637 (1935-01-01), L'Hollier
patent: 2106623 (1938-01-01), Proctor et al.
patent: 2543184 (1951-02-01), Marvosh
patent: 2834052 (1958-05-01), Hunn
patent: 2911008 (1959-11-01), DuBois
patent: 2968474 (1961-01-01), Eichelman et al.
patent: 3599131 (1971-08-01), Flanagan et al.
patent: 3723584 (1973-03-01), Nussbaum
patent: 4161307 (1979-07-01), Clinch et al.
patent: 4371492 (1983-02-01), Murata
patent: 4380250 (1983-04-01), Stoll
Glattli Hans-Heinrich
Stoll Kurt
Housel James C.
Woo Jay H.
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