Plastic article or earthenware shaping or treating: apparatus – Reshaping – resizing or vulcanizing means for tire – tire... – Toroidal or annular female shaping means and coacting means...
Patent
1977-12-07
1978-12-12
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Reshaping, resizing or vulcanizing means for tire, tire...
Toroidal or annular female shaping means and coacting means...
425 39, 425 47, B29H 502, B29H 508
Patent
active
041294068
ABSTRACT:
A mold base has an annular support plate secured thereto and formed with a plurality of equiangularly spaced radial slots and with an external peripheral guide groove. A support structure on the support plate carries an annular base plate mounting the lower half of a cylindrical radially inner chill whose upper half is carried by an annular closure plate. An arm on the base pivotally supports a radial arm pivotally connected to the closure plate, and a toggle linkage is connected between the base and the radial arm. An operating ring is guided in the guide groove for angular displacement by a hydraulic actuator. Radially outer chill sectors are positioned on the base plate and carried by respective die sectors guided in the radial slots of the support plate, and bent crank links connect the die sectors to the operating ring. The die sectors have beveled clamping surfaces engageable with beveled peripheries of the base and closure plates upon displacement of the operating ring in a mold closing direction. A projecting wing on the operating ring engages the toggle linkage near the end of displacement of the operating ring in the mold opening direction, to open the closure plate. The axial and radial stresses, during molding, are absorbed, respectively, by the clamping surfaces of the die sectors engaging the beveled peripheries of the base and closure plates, and by abutments on the operating ring radially aligned with respective spurs on the die sectors which engage the spurs and force the same radially inwardly upon closing of the mold, so that the mold operating components are free of stress during molding.
REFERENCES:
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patent: 3464090 (1969-09-01), Cantarutti
patent: 3479693 (1969-11-01), Cantarutti
patent: 3850555 (1974-01-01), Pasch
patent: 3852006 (1974-12-01), Irie
CIMA Costruzioni Industriali Metalmeccaniche e Affini S.A.S. di
Flint, Jr. J. Howard
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