Process for casting ball iron flywheel by iron model sand covering

A technology for sand-covered casting and sand-covered molding of iron molds, which is applied to manufacturing tools, casting molding equipment, casting molds, etc. The effect of mass production and improving process yield

Inactive Publication Date: 2013-06-12
LUOYANG NEW FIRE ENERGY SAVING TECH PROMOTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Clay sand molding is a commonly used casting method in the field of casting, but there are many problems, such as castings are prone to pores, pouring, cold shut; poor surface finish, sticky sand and other shortcomings

Method used

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  • Process for casting ball iron flywheel by iron model sand covering

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Embodiment Construction

[0011] Below in conjunction with accompanying drawing, the present invention will be further described: figure 1 As shown, the process flow of the present invention is iron mold, mold clamping → sand-covered molding → solidification → mold lifting → box closing, stack gate → molten iron smelting, treatment → pouring → cooling → mold opening → casting, casting mold clean up.

[0012] The sand-covered molding process is characterized in that the temperature of the iron mold is controlled at 210°C to 230°C; the sand shooting uses 0.4MPa compressed air to blow the fluid coated sand into the mold cavity, and the sand shooting time is 1 to 2s.

[0013] The smelting and processing of the molten iron is characterized in that the molten iron is smelted using an intermediate frequency induction furnace, and the furnace temperature is 1520-1550°C; the molten iron needs to be inoculated twice: 0.2% ~0.3% FeSi75; add 0.1% FeSi75 during pouring for the second time for inoculation with flo...

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Abstract

The invention discloses a process for casting a ball iron flywheel by iron model sand covering. The process is characterized by comprising the steps of die assembly for an iron model and a die, sand covering modeling, solidifying, drawing, die assembling, accumulating sprues, molten iron smelting and processing, casting, cooling, die opening, and cast and die cleaning. According to the process for casting the ball iron flywheel by the iron model sand covering, the process for clay sand is simplified, the inherent defects of the clay sand are overcome, free-dead-head production of the ball iron flywheel is achieved, process product yield is improved, and continuous volume production is achieved.

Description

technical field [0001] The invention relates to the field of equipment casting, in particular to a process for casting a nodular iron flywheel covered with sand in an iron mold. Background technique [0002] Clay sand molding is a commonly used casting method in the field of casting, but there are many problems, such as castings are prone to pores, lack of pouring, cold shut; poor surface finish, sticky sand and other shortcomings. [0003] The cavity of iron mold sand-covered casting is an iron shell dry mold formed by sticking resin sand with a thickness of 5~8mm after heat curing on the iron mold. Due to the high hardness and good rigidity of the iron mold sand-coated mold, the sand-coated layer is relatively thin, the sand particle size is fine, and the cooling speed of the casting is fast, so the dimensional accuracy, density, surface quality, and grain refinement of the casting can be significantly improved. Spheroidization rate, and at the same time can realize casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C15/24B22C9/28
Inventor 薛铁山
Owner LUOYANG NEW FIRE ENERGY SAVING TECH PROMOTION
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