Integral valve casting and technology thereof

An integral, valve body technology, applied in the direction of casting molds, casting mold components, manufacturing tools, etc., can solve the problems of easy sintering, poor exhaust, easy formation of pores, etc., and achieves good bending resistance, compact structure, and is not easy to leaked effect

Inactive Publication Date: 2018-10-26
如皋岩达机械工业有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the internal structure of the integral valve body casting is complicated, and it is composed of multiple sand cores spliced ​​together, which is easy to sinter, and the sand co

Method used

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  • Integral valve casting and technology thereof
  • Integral valve casting and technology thereof
  • Integral valve casting and technology thereof

Examples

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[0068] Examples:

[0069] The invention provides a processing technique for integral valve body castings, including mold inspection and cleaning, sand shell and sand core production, sand core coating and drying, sand core drilling, sand core and sand shell matching shell assembly, and modeling And pouring, the key technical steps are as follows:

[0070] 1) Adopting the coated sand shell process, the main valve hole is placed with a Φ4.5mm core during core making, and the main sand core is assembled from multiple sand cores, and there is no gap in the assembly interface;

[0071] 2) Use a new type of high temperature resistant coating as the sand core coating, drill the vent after the core is dried, and check the main channel hole;

[0072] 3) When matching shells, use special "E" sub-shaped core support to fix the suspended sand core;

[0073] 4) When modeling, adopt resin sand burying process, and control the size within ±0.4mm,

[0074] 5) When pouring, use special cold iron combine...

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Abstract

The invention discloses an integral valve casting machining technology. A high-temperature coating is adopted for finishing, an E-shaped core support is used for conducting supporting, and a chillingblock is combined with an exothermic riser. The invention further discloses an integral valve casting prepared through the above technology. A valve comprises a plurality of main runners, a transverserunner, a plurality of vertical runners, a plurality of auxiliary runners and a plurality of runner ports. The transverse runner is located in the vertical direction of the main runners. The auxiliary runners are used for connection between the main runners. The runner ports are formed in the surface of the valve. The runner ports communicate with the main runners through vertical runners. By adoption of the integral valve casting machining technology and the integral valve casting, the beneficial effects that the sand core anti-bending performance is good, the casting is free of air holes, shrinkage cavities and shrinkage porosity, and inner runners are free of sand core sintering trimmings are achieved. Meanwhile, the prepared valve is compact in structure, convenient to use and not prone to leakage.

Description

technical field [0001] The invention relates to the field of mechanical equipment manufacturing, in particular to an integral valve body casting and its technology. Background technique [0002] As a key component of the hydraulic system of agricultural machinery, the valve body was originally assembled with a multi-piece valve body. Because the assembled valve body has defects such as large space structure and easy leakage. Therefore, an integral structure valve body is designed to replace the slice valve. However, the internal structure of the integral valve body casting is complicated, and it is composed of multiple sand cores spliced ​​together, which is easy to sinter, and the sand core has a large amount of gas generation, poor exhaust, and easy to form defects such as pores. Sand core holes are small, easily deformed at high temperature, and difficult to control internal dimensions. Contents of the invention [0003] The purpose of the present invention is to add...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/02B22C9/10
CPCB22C9/22B22C9/02B22C9/10
Inventor 石慧亮
Owner 如皋岩达机械工业有限公司
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