Delta Materials Research Limited

William D Robinson

A mechanical press has a self-adjusting device for automatically setting the position of the mould in the correct position with respect to the stroke of the pressram. The device is located between a fixed platen and a mould carrier and comprises a cylinder having at one end a stiffly resilient plug which normally covers a valve port in the cylinder; a volume of liquid is located between a piston in the cylinder and the plug. If the mould is incorrectly set for the ram stroke, the pressure generated in the liquid so compresses the plug to expose the port for release of sufficient liquid to reposition the mould.

Presses

The noise emanating from a noise-generating source, such as a machine tool or a stock tube, is reduced by covering the surface from or through which the noise emanates with a cladding comprising a first layer, an intermediate layer, and an outer layer. The first layer, 1 to 5 mm thick, of a resilient vibration-isolating material, being plastic foam, rubber foam, rubber, or fibrous material, has the function of decoupling the intermediate layer from the surface. The intermediate layer, 0.25 to 2.5 mm thick, of lead or metal-loaded plastic material in contact with and supported by the first layer, has the function of a sound-insulating barrier. The outer layer, resistant to impact, wear, and abrasion, has the function of surface protection. The total thickness of the three layers need be no more than 6 mm.

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Ipswich, United Kingdom

William D Robinson