Process and apparatus for the production of thin wall tubes from

Details Process and apparatus for the production of thin wall tubes from Process and apparatus for the production of thin wall tubes from

1990-01-26

1991-10-08

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling fluid pressure in direct contact with molding...

264 404, 264 407, 425140, 425141, 425145, B29C 4792

Patent

active

050552449

ABSTRACT:
Apparatus for producing, from rubber and/or plastic mixtures, thin wall tubes for bicycle and motorcycle tires includes an extruder followed by a belt conveyor for transporting the extruded tube blank from the extruder, a scale for weighing the tube blank, another belt conveyor, rolls for forming the blank to a predetermined cross sectional shape and a light source on one side of the tube blank and a light receiver on the opposite side of the tube blank for measuring a transverse dimension of the shaped tube blank and thereby its circumferences. A blower supplies to the interior of the tube blank a mixture of air and powder which is removed by an exhaust blower which is regulated to control the air pressure in the tube blank. The rate of withdrawal of the tube blank from the extruder by the conveyor and the air pressure inside the tube blank are controlled by outputs of the scale and the transverse dimension measuring light receiver.

REFERENCES:
patent: 1544255 (1925-06-01), Maynard
patent: 3787552 (1974-01-01), Spencer et al.
patent: 4095156 (1978-06-01), Borisov et al.
patent: 4156913 (1979-05-01), Apicella, Jr.
patent: 4355966 (1982-10-01), Sweeney et al.
patent: 4470937 (1984-09-01), Sugimoto et al.
patent: 4551289 (1985-11-01), Schwab et al.

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