V-method casting process

Abstract

The invention relates to the technical field of casting, in particular to a V-method casting process. The V-method casting process comprises the following steps: step 1, performing film lamination on a model, that is to say, covering a template with a plastic film under the action of vacuumization; step 2, brushing the film-laminated template with a coating; step 3, putting a sand box on the template, wherein added sand is higher than the sand box; step 4, putting the sand box filled with the sand on a vibration compaction table together with the template, and performing vibration compaction; step 5, after vibration compaction, covering the sand box with a layer of plastic film; step 6, performing core setting, box closing, vacuumization and casting. According to the V-method casting process, a process route is reasonable in design, a produced casting is high in surface smoothness and size precision, a production process is simple, the metal utilization rate is high, all old sand is basically recycled, and the modeling cost is reduced.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a V-method casting process. Background technique [0002] V method casting and lost foam casting are also called negative pressure casting, which is named after the prefix "V" of the English word Vacuum (vacuum). The biggest advantage it differs from traditional sand casting is that it does not use adhesives. V-method casting uses plastic film to seal the sand box, and the air in the mold is drawn out by a vacuum pumping system. There is a pressure difference between the inside and outside of the mold, making the dry sand dense and forming The required mold cavity is solidified by setting the core, closing the box, pouring and evacuating the casting, and the negative pressure is released, and the molding sand is then collapsed to obtain the casting. However, in the prior art, the design of the process flow is rough, resulting in unsatisfactory sealing and strength of the V-metho...

AI Technical Summary

Problems solved by technology

However, in the prior art, the design of the process flow is rough, resulting in unsatisfactory airtightness and strength of the V-method casting mold.