Multi-layer multiplex hydraulic valve mold and casting technique thereof

A casting process and hydraulic valve technology, applied in the field of multi-layer multi-channel hydraulic valve mold and its production process, can solve the problems that the casting process cannot meet the process requirements, the casting cannot expand, the thermal section modulus is small, etc., and can avoid the measurement of sand molds. The effect of hardness, low cost and simple process

Inactive Publication Date: 2009-07-01
南通华东液压铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feature makes the general casting process unable to meet its demanding process requirements; especially when there are many undercut grooves in the main channel, the general domestic processing is achieved by machining, but when the products are sold abroad, their requirements are Guarantee quality by casting process
And only based on the current domestic existing technology, a casting is cast with a length of 333.5. Because the thermal joint at the riser of the casting is large, the shell mold softens when the casting shr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] First, use special copper wire and wire brush to clean the dirt on the outer surface of the mold, and then compare the mold model and the model of the product to be produced, and replace the pouring date on the mold. The model of the mold and the model of the product to be produced must be the same, and the pouring date must be the same day. date.

[0028] Install the mold on the connecting plate of the core shooting machine, adjust the core shooting machine to make the core box open smoothly; adjust the cylinder stroke to facilitate the core and shell demoulding; adjust the mold to make the sand shooting holes on the mold and the sand shooting holes on the shooting plate. Alignment; adjust the mold spacer so that the mold can be positioned accurately and open and close freely; adjust the mold heating device, check whether the temperature indicated by the instrument is consistent with the actual, whether the pressure is normal, and set the sand shooting time and curing t...

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PUM

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Abstract

The invention discloses a mould for a multilayer multi-way hydraulic valve and a casting process thereof. The casting process comprises: cleaning a mould, adjusting the mould, selecting a shell mold and a sand core material, then entering a manufacturing and molding working procedure, and finally casting and mold stripping. The process matched with the mould for the multilayer multi-way hydraulic valve adopts a method with the shrinkage characteristic of the process to control shrinkage amount of a casting, namely controlling the shrinkage amount of the casting by placing a plurality of layers of asbestos cloth at a sand core head of a main flow passage of the casting, finely adjusts the tolerance of the dimension of the casting by adjusting the layer number of the asbestos cloth, smoothly solves the problem of requirement on the dimensional precision of a CAT casting, and is a casting process which can manufacture the multilayer multi-way hydraulic valve with higher precision requirement and stable quality.

Description

technical field [0001] The invention designs a hydraulic valve mold and its casting process, and in particular relates to a multilayer and multi-channel hydraulic valve mold and its production process. Background technique [0002] The multi-layer multi-way hydraulic valve is characterized by three-layer multi-way, which is composed of 8 mud cores. The inner cavity of the valve has a complex shape, and the space of the mud core accounts for about 25% of the volume of the casting. Structural characteristics of castings: uneven wall thickness, multiple isolated thermal joints in the casting, poor feeding channels, easy to produce loosening; multiple mud cores with large air volume; many mud core joints, easy to produce cracks; large thermal joint modulus , the nearby flow channel is easy to stick to sand; the buoyancy in the casting process is large, the diameter of the main flow channel is small and long, and it is easy to deform and twist. This feature makes the general cas...

Claims

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Application Information

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IPC IPC(8): B22C9/24
Inventor 胥春建顾友根
Owner 南通华东液压铸业有限公司
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