| 摘要 |
<p>The method for the production of an endless reinforced toothed belt of synthetic plastics material, the circumferential length in the untensioned condition is to have a predetermined minus tolerance in relation to an operationally tensioned intended circumference having the exact tooth pitch, firstly produces on a moulding wheel and a tensioner wheel a helically wound wire coil with fixed wire ends, the moulding wheel and tensioner wheel having an interaxial distance at which the wire coil has the minus tolerance from the intended circumference. Then the wound wire coil is tensioned with elastic stretching of the wire turns and enlarged to the intended circumference by enlargement of the interaxial distance to the intended distance. Then with the moulding wheel and a moulding belt a closed mould cavity is formed and by injection of synthetic plastics material into the mould cavity beginning a synthetic plastics strand of toothed-belt form is produced into which the wire coil is embedded in the mould cavity. With one revolution of the wire coil the synthetic plastics strand issuing from the mould cavity end is conducted back around the tensioner wheel into the mould cavity beginning and in the mould cavity the beginning of the synthetic plastics strand is cast with its end. Next the intended distance is shortened again and the finished reinforced toothed belt is removed from the moulding wheel and tensioner wheel, the elastically stretched wire coil relaxing and contracting the finished toothed belt to the belt circumferential length with the minus tolerance from the intended circumference.</p> |
