| 摘要 |
An injection method for hollow products, a fusible core and the method for making the fusible core comprises putting a fusible Sn—Bi alloy core into a mold core, then both the product and the fusible core are taken out from the die. The fusible core is turned from solid to liquid state and is apart from the product. The inner wall of the core can be made using this method, and the plastic product can be with more shape in one-step molding to replace the metal in many fields. Complex core-pulling mechanism is not needed, thus the core structure is simplified, and the shape of die can be simplified. The fusible core is not needed to be maintenance for it will not be worn, because after each injection, the fusible core is recycled to make a new fusible core.
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