DE656894C - Device for vulcanizing V-belts - Google Patents

Description

Device for vulcanizing V-belts It is generally known that during the V ulcanislerens of drive belts made of vulcanizable or vulcanizable In the middle of the treated fabrics, a very high pressure is exerted on the vulcanized material must be in order to avoid a change in shape or a spongy same thing.

Finite flat and V-belts are stretched in the Vulcanized jaw press. These presses are very large, heavy and expensive in the purchase as in the company and also have the disadvantage that V-belts, whose length exceeds the press length, must be vulcanized in sections, whereby the evenness of the product suffers.

Endless V-belts are generally based on circular, multi-part Vulcanized molds, the components of which are pulled together by screws; this creates the high pressure required for vulcanizing on the vulcanized material exercised. This way of working is also said to have the disadvantage that it only applies leaves belts of relatively short length.

According to one suggestion, V-belts can be handy in everyone in the establishment occurring length i11 can be vulcanized in a single vulcanizing process by the V-belt is vulcanized in the trapezoidal screw thread of a roller and the screw thread through a protruding into it on the inserted V-belt pressing metal band is closed to the outside.

The invention relates to a device for generating that high pressure, which must necessarily be applied to V-belts during vulcanization, the vulcanized around a molded body under an external tension band. The invention consists in the fact that the pressure due to the difference in thermal expansion of the Vulcanizing mold and the outer clamping land is created by the vulcanizing mold from a building material of high thermal expansion capacity, e.g. B. made of aluminum. the The belt spanning the V-belt made of a building material with low expansion capacity, z. B. made of steel.

The drawing shows the vulcanizing roller in Fig. Z to 3. Fig.4 is a section of the screw thread with inserted V-belt, metal band and pressure roller on a larger scale.

p is the vulcanizing roller, in its screw thread a2 the one to be vulcanized V-belt is in place. c is a metal band whose beginning coincides with the The beginning of the V-belt is fastened by screw d at the beginning of the screw thread is. e are pressure rollers, which the V-belt and the overlying metal band Roll firmly and deeply into the screw thread a = until the flanges e1 of the pressure rollers e the straight guide wreaths al of the scliraub.enganges a ° touch, whereby the V-belt is then precisely determined in its height and width. V-belt and steel tape are at their beginnings and their ends by screwing to the Roller attached.

The high pressure required for vulcanizing on the V-belt during Des. Vulcanization is now achieved according to the invention in that the difference the coefficient of thermal expansion for the vulcanizing roller and for the metal strip used building materials. is exploited. For this purpose is for the vulcanizing roller a building material with a high coefficient of thermal expansion, e.g. B. aluminum, and for that. The metal band spanning the belt is a building material with a low coefficient of expansion has been chosen.

Vulcanizing molds made of aluminum are already known; also metal straps are used in vulcanizing machines with a rotating drum.

Aluminum and rubber have undergone the heat of vulcanization about 1q.0 ° a very high one, in terms of its elongation at this temperature In contrast, the almost completely inelastic steel strip has a very negligible coefficient of thermal expansion. This is how this enclosed rubber and striving for expansion are created due to the expansion in length and diameter of the aluminum roller during vulcanization under the steel band attached to the roller at both ends, an extraordinary one high pressure that extends over the entire length of the screw thread or the V-belt evenly distributed, making a product of the highest uniformity and density is achieved.

Claims (1)

PATEN TANSYRUCH Device for vulcanizing V-belts, which are vulcanized around a molded body under an outer tensioning band, characterized in that the pressure necessary for vulcanization is generated by the difference in thermal expansion of the vulcanizing mold and the outer tensioning band, in that the vulcanizing mold is made from a building material of high thermal expansion capacity, e.g. B. made of aluminum, the belt spanning the belt made of a building material of low expansion, z. B. made of steel.