Speed-up vacuum upper-suction casting mould

Abstract

The invention discloses a speed-up vacuum upper-suction casting mould. The speed-up vacuum upper-suction casting mould comprises a mould tree, transition slots and a sealing shell, wherein the mould tree comprises a vertical through tube, the vertical tube is connected with a plurality of mould cavities in an inclined mode, the mould cavities communicate with the vertical tube through liquid flowing paths, and height of the liquid flowing paths is gradually increased in a radical outward direction of the vertical tube; the transition slots are formed in the inner wall of the vertical tube in asinking mode, one transition slot is crossed above each liquid flowing path, the sinking depth of each transition slot is gradually increased from top to bottom, and a plane on which boundaries of the transition slots and the liquid flowing paths are located is perpendicular to axes of the liquid flowing paths; and the sealing shell covers the mould tree, the mould tree is provided with an insertion tube which is assembled with the sealing shell and communicates with the outside, and the sealing shell is connected with a vacuum generator. The transition slots with the special designs can be adopted to take away metal liquid locally left on the liquid flowing paths, and meet dimension requirements are being solidified, so that follow-up trimming amount is reduced, and speed-up processing effect is achieved.

Description

technical field [0001] The invention relates to the field of casting equipment, in particular to a quick vacuum suction casting mold. Background technique [0002] Vacuum suction casting is a casting method that creates a vacuum in the cavity, sucks the molten metal into the cavity from bottom to top, and solidifies and forms it. The process principle of vacuum suction casting is that the investment shell is placed in the sealed chamber, the sealed chamber is lowered, the sprue is immersed in the liquid metal, and then the vacuum pump is started to evacuate the sealed chamber, and the liquid is sucked and casted at the same time. After the casting in the shell is solidified, the vacuum state is released, and the residual metal liquid in the sprue flows back into the furnace, and the vacuum suction casting is obtained by sand cleaning. There must be a vertical main pipe for the molten metal to flow in the mold shell. When the vacuum is finally released, the molten metal in t...

AI Technical Summary

Problems solved by technology

There must be a vertical main pipe for the molten metal to flow in the mold shell. When the vacuum is finally released, the molten metal in the main pipe will almost flow back due to its own weight, but it is inevitable that some molten metal will remain at the junction of the main pipe and the mold cavity, affecting Dimensional accuracy of workpiece after solidification

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