Method for reducing shrinkage of extruded rubber

Details Method for reducing shrinkage of extruded rubber Method for reducing shrinkage of extruded rubber

1996-01-26

1998-12-08

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Using sonic, supersonic, or ultrasonic energy

264 69, 264 70, 264442, B29C 4788, B28B 108

Patent

active

058464751

ABSTRACT:
Method and apparatus for reducing a shrinkage amount of a rubber member (51) which is comprised of a rubber (3) extruded from an extruder (1). At least one vibrator unit (10a, 10b) applies vibration to the extruded rubber (3) so as to increase the shrinkage speed of the extruded rubber (3) and cause a sufficient advance shrinkage of the extruded rubber within the extrusion train (1), thereby reducing a posterior shrinkage amount of the rubber member (51). An adjustable thermoregulator (30) maintains the extruded rubber (3) at a controlled temperature during application of vibration.

REFERENCES:
patent: 3285442 (1966-11-01), Tigner
patent: 4288398 (1981-09-01), Lemelson
patent: 5068068 (1991-11-01), Furusawa et al.
Rao, H. M., "Vibratory Moulding and Testing: A New Technique and Approach for Quality Product", Popular Plastics, 31, 6, pp. 19-28, 1986.
Ibar, J. P., "Improving Molding Through Melt Flow Oscillation", Modern Plastics International, 25, 1, pp. 72-79, 1995.
English language Abstract of Soviet Union Patent 910 459 A Mar. 7, 1982.
English language Abstract of Japanese Patent Publication No. 01087223, Mar. 31, 1989.
English language Abstract of Japanese Patent Publication 02235719, Sep. 18, 1990.

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