Lost foam casting method for heavy casting
A technology of lost foam casting and large-scale castings, which is applied to casting molding equipment, molds, cores, etc., can solve problems such as the solidification speed of molten iron cannot keep up, large castings have large space, and castings are deformed. The effect of avoiding casting deformation and low cost
Active Publication Date: 2012-12-19
东莞市巨高机床有限公司
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Method used
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Abstract
The invention discloses a lost foam casting method for a heavy casting. The method comprises the following steps of: a. manufacturing a foam model; b. mounting a counter-deformation bracket: manufacturing the steel-structured counter-deformation bracket according to the size and the length of a workpiece and placing the counter-deformation bracket on the bottom of the foam model; c. painting: the thickness of the paint is not less than 4mm; d. drying: placing the painted foam model in a drying room for drying at the constant temperature of 50 DEG C; e. fixing core: placing the steel-structured bracket in an inner cavity of the foam model so as to fix the model, and putting the whole foam model into a sandbox together; f. boxing: enabling the sandbox containing the foam model to drop sand evenly, vibrating the sandbox during sand dropping, gradually enhancing the vibration amplitude with the increasing of added sand quantity, mounting a main runner and a branch runner of a ceramic tube, and placing a pouring cup; g. pouring: opening a vacuum pump for vacuum pumping before pouring; h. releasing negative pressure: after pouring, keeping the negative pressure for 8 to 15 minutes until solidification of an iron liquid, and then releasing the negative pressure; and i. cleaning.
Application Domain
Foundry mouldsFoundry cores +2
Technology Topic
Stationary modelLost-foam casting +6
Examples
- Experimental program(1)
Example Embodiment
PUM
Property | Measurement | Unit |
Thickness | <= 4.0 | mm |
Description & Claims & Application Information
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