Method of molding a hollow molded article, hollow molded article, and apparatus for manufacturing the same
AssigneeThe Japan Steel Works, Ltd.
InventorShoso Nishida
Life of this patent
Estimating the term…
Abstract
First and second semi-finished molded articles and a third semi-finished molded article are molded simultaneously so as to have joint end faces by using a slide die, a fixed die, and first and second slide cores fitted to the fixed die. The slide die with the third semi-finished molded article remaining thereon is moved toward the first and second slide cores, and their respective joint end faces are registered. Heating surfaces are inserted between the joint end faces. After melting the joint end faces, the heating surfaces are retracted, and the molding device is closed to weld the joint end faces.
Claims3
1-4. (canceled)
A hollow molded article comprising:
- a plurality of semi-finished molded articles which are molded to have joint faces in primary molding;
- and
- a heating module having a heating surface,
- wherein the joint faces are melted and contact bonded at the joint faces by the closing of a same molding device as that used in the primary molding or by pressing the semi-finished molded articles inside the molding device;
- and
- wherein the joint faces are melted and contact bonded after the heating module heats and melts the joint faces and is retracted.
(canceled)
Dependencies are inferred from the claim text.