Rft S.p.a.

Mauro Carrara

Giangaetano Ciolfi

An injection-compression process for forming curable items of elastomeric material, the process including: an injection stage wherein a bottom half mold is injected by a nozzle with a quantity of fluid elastomeric material of a volume, at injection pressure, greater than that of the impression, the material in excess of the volume of the impression being collected outside the impression, in a recess at the injection nozzle and communicating with the impression; and a molding stage wherein the injection nozzle is replaced in fluidtight manner by an element of the same shape, but without the recess, for compressing the excess material into the impression until it sets.

Injection-compression process for forming complex shaped items of

A device for testing and withdrawing seals from manufacturing molds, which device consists of a pneumatic pickup member having a front impression connected to a pneumatic line in turn connected to a vacuum source, and defined by opposite edges designed to cooperate with respective peripheral sealing portions of each seal; the pneumatic line presenting a transducer for emitting a signal when the difference in the pressures detected on the line over a predetermined time interval exceeds a predetermined threshold value.

Seal withdrawal and testing device

Apparatus and method for forming seals, such as composite seals in rubber/metal or other materials, includes supplying a raw elastomeric mixture in the form of a suitably shaped extrusion, and optionally a metal or other material insert, to respective loading and a possibly metal or other material insert are supplied to respective loading stations of a transfer machine; the machine is provided with a plurality of carriers each composed of at least two pivoted leaves joined in book-like fashion and each carrying a respective mould half, respective spring presses movable on the machine together with the said carriers, and cam means for holding the said carriers open at the loading stations; after cleaning of the mould halves and spraying of the upper mould half with a release agent a said insert is deposited between the mould halves by means of manipulators able to self-center themselves with respect to each carrier and then a blank of raw mixture obtained by slicing the extrusion is deposited between the mould halves; finally each carrier is closed in such a way as to bring the mould halves together, disposed clamped under the corresponding spring press and fed into a polymerization tunnel.

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Viggiu′, Italy

Mauro Carrara