Metal casting mold applied to composite liquid lift-up hard mold and based on low-pressure gravity casting

Abstract

The invention discloses a metal casting mold applied to a composite liquid lift-up hard mold and based on low-pressure gravity casting. The metal casting mold structurally comprises filtrate scrappingtroughs, hydraulic connecting rod frames, sliding backing plates, an upper parting cover block, casting liquid lift-up trough drums, a lower parting seat block and a demolding linear plate trough. The metal casting mold has the beneficial effects that a low-pressure gravity suction effect is formed through the cooperation between the casting liquid lift-up trough drums and the lower parting seatblock, so that the floating liquid level at the top can be subjected to wall-attached settlement and recoil, and the internal thinness can be facilitated through pneumatic air cooling during the assembly of upper and lower parting surfaces; furthermore, a piston pressure and internal heat effect is formed through low-pressure liquid lift-up and recoil, so that the liquid-state stability of a metalliquid in internal runners can be guaranteed, runner vertical-rod frames can be prevented from being clogged by blocks, and the communicating and pressure increasing effect of the entire low-pressuregravity settlement process can be improved; an index stabilizing operation for balancing air pressure is formed when the bottoms of runners communicate through the demolding linear plate trough, so that the completion degree of formed object demolding during the metal casting process can be guaranteed, and the properties of thimble rods and ejector sleeve push seats can be maintained; and a flexible-coating demolding effect is formed through the cooperation with recoil airflow.

Description

technical field [0001] The invention relates to a metal casting mold based on a low-pressure gravity pouring compound rising liquid hard mold, which belongs to the field of molds. Background technique [0002] Metal casting molds are processing equipment for metal pouring and molding, which are convenient for molding and precise pressing in the mold grooves, ensuring the output and continuous supply effect of opening and closing molds during mass production, and also improving the convenient operation of molds for high-hardness metal processing. The current technology Common disadvantages to be optimized are: [0003] The strength of metal casting is extremely high, and it is necessary to carry out molding and pressing operations before the molten metal is rapidly cooled. However, in the process of upper and lower mold clamping, the air-cooling pressure caused by the air in the extrusion gap will pre-cool the top layer of the molten metal, resulting in The depth of the low-...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a metal casting mold based on a composite rising liquid hard mold based on low-pressure gravity pouring, so as to solve the problem that the strength of metal casting is extremely high, and it is necessary to carry out molding and pressing of the molten metal before rapid cooling. Mold operation, but often in the process of upper and lower mold clamping, air-cooling pressure is caused by the air in the extrusion gap, and the top layer of the molten metal is pre-cooled, resulting in the depth of the low-temperature liquid flow combined with high-level air cooling to thicken the casting size, thereby affecting the finished product. The liquid storage in the inner tank causes the deviation of the volume value, which makes the inner tank of the formed metal part swell and thick, reduces the use efficiency of the formed metal object, and also causes the thickness of the thimble cylinder to be released from the mold in the later stage. This will cause thick and high hardness The bending deformation of the metal surface of the needle body, the problem of loss of quality of the inner frame parts of the mold

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