Process for producing high precision apertures in plastic compon

Details Process for producing high precision apertures in plastic compon Process for producing high precision apertures in plastic compon

1983-09-06

1985-01-22

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264154, 264296, 264346, B29C 2500

Patent

active

044951299

ABSTRACT:
A process for producing high precision apertures in plastic components comprises the steps of: injection molding the component from a crystalline or semicrystalline thermoplastic material wherein at least one aperture is formed in the component during the molding step; inserting an annealing rod having an oversized diameter with respect to the aperture into the aperture; placing the component, with the annealing rod inserted into the aperture, into an oven at an elevated temperature for a period of time; allowing the component to cool; and withdrawing the annealing rod from the aperture of the component.

REFERENCES:
patent: 3508760 (1970-04-01), Woodling
patent: 3544673 (1970-12-01), Inskeep, et al.
patent: 3562199 (1971-02-01), Hill et al.
patent: 3582521 (1971-06-01), Villa
patent: 3656233 (1972-04-01), Overholser
patent: 3725337 (1973-04-01), Villa
patent: 3878113 (1975-04-01), Campbell et al.
patent: 4001889 (1977-01-01), Schneider
patent: 4161004 (1979-07-01), Dolziel

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