The basic principle of the meltable core injection molding is to first cast a fusible core by using a low melting point alloy, and then insert the fusible core as an insert into the mold for injection molding, and after cooling, the part containing the core is removed from cable tie mould manufacturer the cavity. The core is taken out and heated to melt the core to form a hollow product. When a plastic part that is difficult to demold on an injection molded structure, such as an automobile oil pipe and an intake and exhaust manifold, a hollow product having a complicated shape, a fusible core injection molding can be employed. Then let us introduce the soluble core injection molding.
The process of the fusible core injection molding technology is as follows: casting the core with a low melting point metal → placing the mold into the mold → taking out the part with the core → heating the melting core → cleaning the part → the product. At present, fusible core injection molding technology has only accumulated some experience in PA66. Preliminary experimental research shows that PA6, PBT, PET, PPO, etc. are also suitable for fusible core injection molding. The fusible core material is often a Sn-Bi and Sn-Pb low melting point alloy. The melting core generally uses an oil heating and induction coil heating method. Precautions for the injection molding process of the fusible core: The core cannot melt when the plastic part is injection molded. At the temperature of the molten core, the part does not deform.
The metal melt that makes the core and the medium used to melt the core do not corrode the plastic. What are the advantages of the fusible core injection molding? It is especially suitable for the production of composite products with complex shapes, hollow shapes and unsuitable machining. The internal dimensions of the hollow plastic parts are accurate and the surface is smooth, which cannot be achieved by the usual method. Compared with blow molding and gas-assisted injection molding, although it is necessary to increase the equipment for casting the fusible core and the equipment for melting the core, the existing injection molding machine can be fully utilized, and the degree of freedom of molding is large. I hope my summary is useful to everyone.
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