Bottom gating system with ingate in circular cross section
A technology of gating system and inner sprue, which is applied to casting molding equipment, casting molds, cores, etc., can solve the problems of high rejection rate of castings, achieve the effect of improving casting quality, ensuring casting quality, and reducing the volume of sand box
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[0019] Hereinafter, the present invention will be further described through a preferred embodiment in conjunction with the drawings of the specification.
[0020] The bottom pouring system of the ring-shaped cross-section inner runner of the present invention, such as figure 1 As shown, it includes a cavity 1 and a total sprue 2, a runner 3, a sub-sprue 4, and a sub-runner 5 that are connected in sequence. The sub-runner 5 is connected to the runner via a ring-shaped cross-section inner runner 6 The bottom of cavity 1.
[0021] In order to facilitate the manufacture of the mold, the cavity 1 is formed between the molding sand 7 and the upper core 8 and the lower core 9 placed in the molding sand 7. Specifically, an annular cross-section inner runner 6 is formed around the lower core 9 and Surrounded by molding sand 7, especially the lower mud core 9 is in the shape of a truncated cone with a large top and a small bottom. The diameter of the upper end of the runner 6 in the ring sec...
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