| CPC H01R 13/5213 (2013.01) [B29C 45/14819 (2013.01); B29C 45/2628 (2013.01); B29C 45/44 (2013.01); B29C 45/4421 (2013.01); F04B 39/121 (2013.01); H01R 9/16 (2013.01); H01R 9/223 (2013.01); H01R 9/2416 (2013.01); H01R 13/005 (2013.01); H01R 13/405 (2013.01); B29C 45/36 (2013.01); B29C 2045/363 (2013.01); B29C 2045/445 (2013.01); B29C 2791/002 (2013.01)] | 5 Claims |
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1. A molding method of a sealing cover, the sealing cover comprising: a top cover, a side wall, a bottom plate, and side plates; the side wall surrounds one side of the top cover and forms a half-surrounded space; the bottom plate is arranged in the half-surrounded space and fixed on the side wall; a side of the bottom plate facing the top cover, the top cover and the side wall together form a wire fixing part, and the side of the bottom plate facing away from the top cover and the side wall together form a fitting space; the side plates are arranged in the wire fixing part and fixed between the top cover and the bottom plate; a guide hole is provided on the bottom plate to communicate the wire fixing part and the fitting space; a blind hole is provided at an inner side of the top cover in the wire fixing part with a same axis of the guide hole; the molding method comprising:
when molding, setting up a sealing cover mold, the mold comprises a cavity and a core group arranged in the cavity:
setting up a first core; the first core comprises a molding base, a molding column and cover molding block; the molding column and the cover molding block are arranged on a same end surface of the molding base, a height of the cover molding block is smaller than that of the molding column, and the cover molding block surrounds three sides of the molding column; a mold opening direction of the first core is parallel to an axial direction of the molding column;
setting up a second core; the second core comprises a wire insertion space molding block and a through hole penetrating the wire insertion space molding block, and a sectional shape of the through holes projected along an axis of the through hole is the same as the sectional shape of the molding column along an axis of the molding column; the mold opening direction of the second core is not parallel to the axis of the through hole;
inserting the molding column of the first core into the through hole of the second core to form a core group; the wire insertion space molding block fits the cover molding block and one end surface extends outside the molding base;
setting a cavity and putting the core group into the cavity; a gap is formed between the inside surfaces of the cavity and the outside surfaces of the core to form the top cover and the side wall; a gap is formed between the molding base and the wire insertion space molding block to form the bottom plate and the side plates, and the molding column is exposed upward from the molding base and outside the wire insertion space molding block to form the guide hole and the blind hole, and projected along the axis, the sectional shapes of the blind hole and the guide hole are the same;
injecting molten plastic into the cavity, and filling the gaps between the core, the first core and the second core to perform injection molding of the sealing cover;
after the injecting molding is completed, removing the first core from the sealing cover in a direction parallel to the axis of the molding column; and
removing the second core from the sealing cover in the mold opening direction thereof after the first core is removed from the sealing cover.
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