Precision casting mold for overlap-connecting ball and preparation method
A technology of precision casting and splicing, which is applied in the field of metal precision casting, can solve the problems such as the inability of the inner model to be demolded, and achieve the effects of solving cumbersome processing procedures, eliminating potential safety hazards, and increasing strength
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Embodiment 1
[0037] Example 1 : Precision casting mold for connecting ball
[0038] like Figure 1-6 As shown, the precision casting mold for connecting balls includes an upper outer mold 1, a lower outer mold 2, a six-sided inner mold core 3, and a concentric limit block 4; the upper outer mold is fixed on the lower outer mold , the upper external mold and the lower external mold are enclosed to form a six-sided external cavity that matches the shape of the connection ball A; the lower external mold is provided with a bottom through hole 21 that matches the shape of the concentric limit block, The concentric limiting block is inserted into the bottom through hole, and extends into the six-sided outer cavity, and the bottom of the six-sided inner mold core abuts on the concentric limiting block, so that the six-sided inner model The core is concentrically installed in the six-sided outer mold cavity; the six-sided inner model core includes a central core-pulling 31, four corner core-pul...
Embodiment 2
[0046] A method for preparing a precision casting splicing ball, which is processed by using the precision casting mold of the splicing ball of embodiment 1; specifically comprises the following steps:
[0047] Steps for injecting wax molds: Install the splicing ball precision casting mold of Example 1 on the wax injection machine, see Example 1 for the specific structure, then spray the wax into the mold cavity, and remove the mold after the wax is solidified and formed. Get the splicing ball wax model;
[0048] The demoulding process is as follows: first disassemble the upper external mold and the lower external mold to obtain the six-sided inner mold core and the wax mold covered on the surface of the six-sided inner mold core, and then extract it from the through hole on the top or bottom of the wax mold. Pull the center core, then extract the four side cores one by one, and finally extract the four corner cores one by one, and then get the spliced ball wax model B.
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