Magnetic steel insert injection molding device and injection molding method

Abstract

The invention relates to the technical field of injection molding processes, and discloses a magnetic steel insert injection molding device and injection molding method. The magnetic steel insert injection molding device comprises a first injection mold, a second injection mold and a prefabricated protection structure. The second injection mold and the first injection mold are buckled to form an injection molding cavity, and a part to be subjected to integrated injection molding and a magnetic steel insert are both arranged in the injection molding cavity. The prefabricated protection structure is arranged in the injection molding cavity. One side of the prefabricated protection structure is attached to the outer surface of the magnetic steel insert, and the other side of the prefabricatedprotection structure is attached to the inner wall of the first injection mold. According to the magnetic steel insert injection molding method, injection molding is conducted through the magnetic steel insert injection molding device mentioned above. By means of highly attachment of the prefabricated protection structure and the outer surface of the magnetic steel insert, external injection molding pressure can be exerted in the prefabricated protection structure, the situation that the magnetic steel insert bears force cannot be caused, and hidden crack defects caused by the fact that because of external diameter tolerance of the magnetic steel insert or the mold internal diameter tolerance, the magnetic steel insert and the molds are not matched are avoided.

Description

technical field [0001] The invention relates to the technical field of injection molding technology, in particular to a magnetic steel insert injection molding device and an injection molding method. Background technique [0002] With the development of automobile technology, the demand for magnetic steel is increasing. The shape of magnetic steel is no longer limited to some regular shapes, and more and more magnetic steel will be required to be integrally injected as an insert of parts. NdFeB magnets are a kind of magnets commonly used in various industries, and are widely used due to their excellent magnetic properties. [0003] However, the NdFeB magnet itself is a brittle material. During the injection molding process, when the magnet is used as an insert for injection molding, the injection pressure will be fully applied to the magnet insert. Due to the tolerance of the outer diameter of the magnet insert or The magnetic steel insert does not match the injection mold...

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Problems solved by technology

[0003] However, the NdFeB magnet itself is a brittle material. During the injection molding process, when the magnet is used as an insert for injection molding, the injection pressure will be fully applied to the magnet insert. Due to the tolerance of the outer diameter of the magnet insert or The magnetic steel insert does not match the injection mold caused by the inner diameter tolerance of the injection mold, which is prone to crack defects

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