Plastic article or earthenware shaping or treating: apparatus – Reshaping – resizing or vulcanizing means for tire – tire... – Control means responsive to condition sensing means
Patent
1986-10-01
1987-09-22
Hoag, Willard E.
Plastic article or earthenware shaping or treating: apparatus
Reshaping, resizing or vulcanizing means for tire, tire...
Control means responsive to condition sensing means
425 35, 425 52, 425135, 425150, B29C 3320, B29C 3502
Patent
active
046952357
ABSTRACT:
A coil section for being excited by a primary ac signal and producing a secondary output signal is provided on the open end side of a bag-cylinder main body. A material consisting of such substance and having such configuration that bring about reluctance change of a magnetic circuit passing through the coil section in accordance with displacement of a piston rod of the bag-cylinder is provided in a predetermined pattern about the piston rod. In a detection circuit, position detection data representing the position of the piston rod is obtained in response to the secondary output signal from the coil section. In a position establishing circuit, stop position data representing a desired position at which the piston rod should be stopped is established depending upon the diameter of a tire to be vulcanized. In a comparison and control circuit, stopping of the piston rod is controlled, in a specified step in a sequence for vulcanizing the tire, in accordance with comparison between the established stop position data and the position detection data. This control device can readily cope with tires of different diameters simply by changing the stop position data.
REFERENCES:
patent: 3380115 (1968-04-01), Soderquist
patent: 3585686 (1971-06-01), Balle
patent: 4022554 (1977-05-01), MacMillan
Hirata Yoshiaki
Ichikawa Wataru
Ito Mikiya
Matsuki Yuji
Bridgestone Corporation
Hoag Willard E.
Kabushiki Kaisha SG
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