Pneumatic tires, automobile, truck, airplane, motorcycle, bicycle; an encyclopedia of tire manufacture, history, processes, machinery, modern repair and rebuilding, patents, etc., etc. .. by Pearson Henry C. (Henry Clemens) 1858-1936

Author:Pearson, Henry C. (Henry Clemens), 1858-1936
Language: eng
Format: epub
Tags: Tires
Publisher: New York, The India Rubber Publishing Co
Published: 1922-03-25T05:00:00+00:00

Doughty Tube Vulcanizing Press

the tube mold. The hydraulic press A supports and operates the mold, which is made in two sections B and C, both of these mold sections being cored for steam. The lower section (J ia raised and lowered by three hydraulic cylinders D, operated by water pressure admitted throu^ the pipe E to the hollow pistons F. Unlike most hydraulic presses, the pistons are stationary, while the cylinders mo\e. Pipes G convey steam to the upper and lower mold sections, that for the lower section having flexible joints to permit movement when it is raised or lowered. The molds have longitudinal semi-circular channels which raster when the sections are brought together, and form tubular vulcanizing chambers. Their ends are contracted to form bearings for supporting the mandrels A'. In use the mandrels are placed parallel to each other between two sheets of rubber and the whole is carried to the press on two socket bars which hold the mandrels and the rubber sheet securely in place during the transfer.

For attaching the valve tubes, the lower mold section C has a transverse recess M, which receives the auxiliary mold .Y. This is provided with semi-circular recesses R corresponding to the shape of

I be valve tubes when the two parts of the mold are brought together. N haa handles by which it may be lifted in and out of the recess M. Its upper face has semi-circular channels S, which twister with the tube channels of the mold proper. Before placing the mandrels and tubes in the press the valve tubes T are slipped upon short mandrels U and inserted in the openings E. The mold A' is then placed in the le-cess M and the mandrels and sheets of rubber placed upon the mold section C aa described above. 7n this way the flanges of the valve tubes are vulcanized to the main tubes during the cure of the latter. When the mandrels and valve tube^ arc in place the socket bars are removed and the lower mold section /' is raised in contact with the upper section and held until the tubes have been cured. The mandrels with the cured tubes connected by thin films from the overflow are removed from the press, the film severed and the tubes stripped from the mandrels ready for inserting the valve.

I Mauy Press Vulcanizeb

Adamsox Mold Press Vulcaxizek

This mold press, operated hydraulically, has a swinging lower mold to facilitate the insertion or removal of the tire.

It may have a number of platens arranged one above the other, to any desired height. The lower platen can be swung out clear of the machine by the handle, as shown, and the tire mold inserted. The platen, and mold are then swimg back into alinement with the upper platen, when the ram action is started. The upper platens have an opening to afford inflation of the tires when the press is closed. First, the lower platen will be forced up against the upper platen which, in turn, will force the lower platen of the next tier against its upper platen.

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