Vacuum-pumping device

Abstract

The invention provides a vacuum-pumping device and belongs to the technical field of casting. By means of the vacuum-pumping device, the technical problems of an existing casting process being inconvenient in sand compaction, troublesome in casting process and low in casting efficiency are solved. The technical scheme of the vacuum-pumping device is that the vacuum-pumping device comprises an operating platform, an operation box capable of moving on the operating platform and an air pumping pump fixed to the operating platform and connected with the operation box, wherein the operation box isprovided with a containing cavity used for containing molds and sand, provided with a net hood capable of preventing the sand from leaking and provided with an air pumping pipe communicating with thecontaining cavity through the net hood, and when the operation box moves to be opposite to the air pumping pump, the air pumping pump communicates with the air pumping pipe. The vacuum-pumping deviceis easy and convenient to operate, the labor intensity is greatly reduced, the sand sealing process is fast, the preparing time before the casting and the whole casting time are shortened, and the casting efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of casting, and relates to a vacuumizing device, in particular to a vacuumizing device. Background technique [0002] Casting is a processing method for molded products such as plastics and metals. In the early stage of casting, liquid monomers or prepolymers (see polymers) were injected into the mold under normal pressure, and then polymerized and solidified to become the same as the mold. Products with the same cavity shape. [0003] In the traditional casting process, in order to prevent the mold from expanding under high pressure after casting, or to make the liquid raw material in the mold form under a relatively stable condition and ensure the quality of the molded product, the mold is generally buried in sand and compact the sand to increase the compactness and stability of the mold and prevent the mold from expanding during the casting process. Although this existing casting process can meet the bas...

AI Technical Summary

Problems solved by technology

[0003] In the traditional casting process, in order to prevent the mold from expanding under high pressure after casting, or to make the liquid raw material in the mold form under a relatively stable condition and ensure the quality of the molded product, the mold is generally buried in sand and compact the sand to increase the compactness and stability of the mold and prevent the mold from expanding during the casting process. Although this existing casting process can meet the basic needs of casting, it is obviously backward and There are the following technical problems. Before casting, the mold needs to be buried in the sand, and the sand is compacted during casting. After the raw materials in the mold are formed, the tight sand is smashed, and then the mold is taken out of the sand and placed in the sand. Demoulding, this process is cumbersome, especially in the cyclic casting process, the sand needs to be continuously compacted and smashed, which consumes a lot of manpower and material resources, increases the labor intensity, and at the same time elongates the entire casting process, resulting in Casting efficiency is low

Images