| 摘要 |
<p>PURPOSE:To realize a high accuracy of processing of a groove, and to obtain a good fusion connection, by forming a spiral groove provided in an inner cylinder member in a mechanical processing, in a tube joint in which a heating wire is wound along the groove formed in the inner cylinder member, and an outer cylinder member is injection molded. CONSTITUTION:A heating wire is wound along a spiral groove 3 formed on the outer periphery of an inner cylinder member 1, both ends of the heating wire is connected to connector pins projecting at the both end parts of the inner cylinder member 1, and an outer cylinder member is formed integral in an injection molding at the outer side of the inner cylinder member 1, so as to manufacture a plastic tube joint. In this case, the spiral groove 3 provided to the inner cylinder member 1 is formed by a mechanical processing by placing a specific distance from the inner surface of the cylinder in the diameter direction, and thereby, the position of the heating wire when it is wound is made constant, and a good fusion connection can be accomplished.</p> |
