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Riser used for casting cast piece as well as manufacturing method thereof and application thereof

A casting and riser technology, applied in the field of shrinkage, can solve the problems of increasing manufacturing costs and uneven levels of the foundry industry, and achieve the effects of increasing the yield, reducing the shrinkage of the refiring line, and improving economic benefits

Inactive Publication Date: 2017-03-15
丹东釜鼎工程机械有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] Market status: The overall environment is sluggish, especially the level of the foundry industry is uneven. In the case of ensuring the quality of castings, it is mainly a cost dispute. The price of heating risers is 30-40 yuan / piece. Domestic insulation risers Also between 15-25 yuan, relative comparison increases the manufacturing cost

Method used

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  • Riser used for casting cast piece as well as manufacturing method thereof and application thereof

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Experimental program
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Effect test

Embodiment Construction

[0012] 75% of casting coated sand (70 / 140 mesh) produced by Dalin is used as heat insulation refractory material, 5% of 100 mesh magnesium powder is used as induced heat material, and 20% of high-efficiency coal powder (≥100 mesh) in Inner Mongolia is used , the high volatile content is used as insulation material to replace the insulation riser currently used in foundries.

[0013] Production process: first make a hot core box

[0014] Mix the coated sand, magnesium powder and coal powder according to the above ratio for 2-3 minutes, then add them to the sand bucket of the hot core machine, and when the hot core box is heated to 180-230°C, close the mold and shoot the sand, and the curing time is 60s , coring.

[0015] The test results show that the feeding efficiency of the new insulation riser is the same as that of the expanded perlite type insulation riser currently used in the factory, and the casting cost is only 20% of the cost of the original purchase of the insulati...

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Abstract

The invention relates to a riser used for casting a cast piece as well as a manufacturing method thereof and an application thereof, and the riser is used for feeding a cast piece of a cast nodular iron tractor machine base. The riser consists of the following components in percentage by weight: 74-76% of pre-coated sand, 4.5-5.5% of magnesium powder and the balance pulverized coal. The thermal-insulation riser is good in thermal insulation, is high in refractoriness, is strong in feeding ability, is small in linear change on reheating, is convenient to use, and is free of environmental pollution.

Description

technical field [0001] The invention relates to a feeding for casting ductile iron traction machine frame castings, in particular to a feeding riser for casting traction machine frame castings. Background technique [0002] In the field of casting, the volume and size of the liquid alloy will decrease during the cooling and solidification process. When the volume of the liquid alloy shrinks greatly, shrinkage cavities (looseness) will occur at the hot joints of the casting. Therefore, in order to obtain For dense and defect-free castings, properly designed riser feeding is a must. [0003] The above-mentioned machine base castings are security parts on the gearless permanent magnet traction machine of the elevator, and are the load-carrying device for the elevator to transmit the power of the traction machine, connecting all the braking devices, reducer devices and motor transmission devices. [0004] Base material and process requirements: the base bears all the loads of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08
CPCB22C9/088
Inventor 于庆勇
Owner 丹东釜鼎工程机械有限公司
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