What lost-core injection molding methods create hollow PVC outdoor tree box components?

Lost-core injection molding is a specialized technique used to produce hollow PVC components, such as outdoor tree boxes, with intricate geometries and high structural integrity. This method involves inserting a soluble or meltable core into the mold cavity, which is later removed to leave a hollow interior. For PVC outdoor tree boxes, the most effective lost-core methods include:

1. Soluble Core Injection Molding: A water-soluble core (often made of salt or ceramic) is placed in the mold, and after molding, the core is dissolved away, leaving a hollow PVC structure.

2. Fusible Core Injection Molding: A low-melting-point alloy core is used, which melts and drains out after the PVC part cools, creating the hollow space.

3. Sand Core Injection Molding: Sand cores are used for larger components, which are removed by shaking or blasting after molding.

These methods ensure precise, lightweight, and durable hollow PVC tree boxes, ideal for outdoor use due to their resistance to weathering and mechanical stress.