| 摘要 |
<p>PURPOSE:To obtain a process for producing a tape guide roller which improves a method of molding the resin roller in such a manner that the flow of the resin is made constant, that the uniformity (consistency) of the reference bore size and the out-of-roundness of the bore surface of the central hole of the roller in particular is easily attained and that the cost of products is reduced. CONSTITUTION:The cylindrical resin roller 5' having the central mole 6 of the reference bore size corresponding to product specifications and an outer peripheral surface 7' of an outside diameter size E slightly larger than the reference outside diameter size (e) corresponding to the product specifications is integrally molded by injection molding. The outer peripheral surface 7' slightly larger than the reference outside diameter (e) of this resin roller 5' is thereafter machined with high accuracy and is finished as a tape guide traveling surface 7 of the reference outside diameter size (e) meeting the product specifications. The injection molding of the resin roller 5' in this process for producing the tape guide roller is executed by side gate system which injects a molten resin 5a into a mold cavity 10 from a central gate part 10a of the outer peripheral surface of the cavity.</p> |
