| 摘要 |
A method of producing in a continuous process an endless driving belt of any desired circumferential length of an extrudable synthetic material with a pull-resistant reinforcing insert extending in the longitudinal direction of the belt to be produced, according to which a mold chamber is formed between a rotatable molding wheel and an endless molding belt moving along a portion of the circumference of the molding wheel together with the latter. Liquid synthetic material is in a continuous manner and under pressure introduced into the sealed start of the mold chamber. The reinforcing insert is in a sealed manner likewise continuously introduced into the mold chamber while the reinforcing insert during the embedding thereof in the liquid synthetic material is up to the solidification of the synthetic material and prior to leaving the mold chamber supported at a radial distance from the surface of the molding wheel. When leaving the end of the mold chamber, the strand of synthetic material with the reinforcing insert therein is passed around a tensioning wheel spaced from the molding wheel by a distance adjusted in conformity with the desired circumferential length of the belt. The strand of synthetic material is during a simultaneous displacement in axial direction of the molding wheel by the width of the aforementioned strand returned to the molding wheel. The strand is then directly laterally adjacent the mold chamber with at least one portion of its width again introduced between the molding wheel and the molding belt while the mold chamber formed thereby is on that side thereof which faces the returned strand directly sealingly closed by the strand while the other side of the mold chamber is closed by the molding wheel and the molding belt. In a continuous manner at the start of the mold chamber, a new strand formed from introduced liquid synthetic material is injection molded onto that lateral surface of the returned strand which faces the mold chamber, the strand laterally closing the mold chamber.
|
