| 摘要 |
PURPOSE: A mold for producing aluminum-coated pipes is provided to improve the adhesion, wear resistance, and durability of an aluminum pipe by forming a double coating layer on the aluminum pipe. CONSTITUTION: A mold for producing aluminum-coated pipes comprises a female mold(21) and a male mold(22) having contact surfaces inclined to form a cone shape. Molten resin is injected through a molten resin injection port at the top of the female mold. The distance of inserting the male mold into the female mold is changed to control the thickness of a coating layer(30). [Reference numerals] (AA) Injecting a coating material |
