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Valve sand casting mold

A technology of sand casting and sand casting, which is applied in the field of sand casting molds for valves. It can solve the problems of poor casting precision, falling sand, and sand inclusions in castings, and achieve the effects of reducing sand inclusions in castings, increasing the yield of castings, and improving the precision of castings.

Inactive Publication Date: 2014-12-24
CHENGDU FANXINJIA TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The invention provides a sand casting mold for valves, which solves the problems of poor casting precision, sand washing, sand inclusions, sand holes and casting sand falling.

Method used

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  • Valve sand casting mold

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, the valve sand casting mold includes a sand box 1, a sand mold 2, a core and an anti-stick coating 4. It is characterized in that: the core adopts a structure of one main core 3 and four auxiliary cores 5, and there are multiple air holes 8 on the core. . In the valve sand casting mold of the present invention, the sand box 1 is provided with a trumpet-shaped sprue 6 to avoid hidden dangers caused by molten iron splashing. The core adopts a structure of one main core and four auxiliary cores. The main core is used to cast the main body of the valve, and the auxiliary core is used to cast the bolt holes on the valve. The valves thus produced are formed once, without the need for secondary processing to drill bolt holes, which ensures the accuracy and aesthetics of the valves. The main core 3 and the auxil...

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Abstract

The invention discloses a valve sand casting mold, belongs to the field of casting molding, and in particular relates to a sand casting mold. The mold comprises a sand box, a sand mold, a mold core and an anti-adhering coating, wherein the mold core is of a structure with one main core and four auxiliary cores; the auxiliary cores are arranged around the main core; the four auxiliary cores are connected together through an annular pouring gate; an opening is formed in the annular pouring gate and is connected with a main pouring gate; a plurality of exhaust holes are formed in the upper side of the body of the main core; the anti-adhering coating is arranged on one surface, on which a cavity is formed by the sand mold and the mold core, of the sand mold, and coats the outer side of the sand mold. By adopting the valve sand casting mold, the defects that a cast piece is relatively poor in size precision after being processed for multiple times, and the probability of sand washing, sand inclusion and pores is high, are effectively overcome.

Description

technical field [0001] The invention belongs to the field of casting modeling, and in particular relates to a valve sand casting mold. technical background [0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. [0003] At present, valve castings are mainly cast with wet sand molds and dry sand cores. After multiple processings, the dimensional accuracy of the produced castings is poor, and defects such as sand washing, sand inclusions, and pores are prone to occur. At the same time, the cleaning of castings is laborious and laborious. Contents of the invention [0004] The inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/24B22C9/02
Inventor 高静袁代华邓金智
Owner CHENGDU FANXINJIA TECH
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