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Valve body lost mould and using method thereof

A technology of lost foam and valve body, which is applied to casting molding equipment, casting molds, cores, etc. It can solve the problems of labor consumption, unfavorable filling, and waste of materials, so as to save materials and labor, reduce post-processing costs, and delay solidification the effect of time

Active Publication Date: 2016-01-06
埃维柯精密铸造(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a valve body lost foam and its use method to solve the above-mentioned method of adding a large riser to the top of the upper flange flange to avoid shrinkage caused by the prior art. Low process yield , and the workload in the later stage is also large and the cost is high. The conventional lost foam casting process adds a large riser at the bolt table, which greatly reduces the process yield of the casting, wastes a lot of materials and consumes more Artificial, when placed horizontally, it is not conducive to filling, and the filling effect is poor

Method used

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  • Valve body lost mould and using method thereof
  • Valve body lost mould and using method thereof
  • Valve body lost mould and using method thereof

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Effect test

Embodiment 1

[0034] A method for using the lost foam of a valve body, the specific steps comprising:

[0035] (1) According to the drawings of the valve body, use three-dimensional software to design the manufacturing model, and use CAE analysis software to analyze, determine the appropriate model, and manufacture the corresponding mold;

[0036] (2) Pre-haired or expandable polymethyl methacrylate resin beads;

[0037] (3) Use expandable polymethyl methacrylate resin beads to make a white mold for the valve body and dry it.

[0038] (4) In the white mold square cavity after molding, make sprue 2, runner 3, vertical sprue 4 and ingate 5 with expandable polymethyl methacrylate resin beads, place the first The runner 31, the second runner 32 and the third runner 33 are respectively bonded in parallel between the first vertical runner 41 and the second vertical runner 42, and the distance between each runner 3 is equal , the connection between each runner 3 and the vertical runner 4 is bonded...

Embodiment 2

[0049] A method for using the lost foam of a valve body, the specific steps comprising:

[0050] (1) According to the drawings of the valve body, use three-dimensional software to design the manufacturing model, and use CAE analysis software to analyze, determine the appropriate model, and manufacture the corresponding mold;

[0051] (2) Pre-haired or expandable polymethyl methacrylate resin beads;

[0052] (3) Use expandable polymethyl methacrylate resin beads to make a white mold for the valve body, put the white mold in a drying room, and adjust the temperature to 50-55°C for drying.

[0053] (4) In the white mold square cavity after molding, make sprue 2, runner 3, vertical sprue 4 and ingate 5 with expandable polymethyl methacrylate resin beads, place the first The runner 31, the second runner 32 and the third runner 33 are respectively bonded in parallel between the first vertical runner 41 and the second vertical runner 42, and the distance between each runner 3 is equ...

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Abstract

The invention discloses a valve body lost mould and a using method thereof. The valve body lost mould comprises a lost mould, a sprue cup and an ingate, wherein the lost mould comprises a sealing surface and a valve seat; the ingate is divided into a straight pouring gate, a transverse pouring gate, a vertical pouring gate and a flow gate; the flow gate is arranged on a joint of the transverse pouring gate and the vertical pouring gate; the sprue cup is connected with the straight pouring gate; the straight pouring gate is connected with a second transverse pouring gate; a sealing surface is arranged on the upper part of the flow gate; and the valve body is parallel to the transverse pouring gate. The using method of the valve body lost mould comprises eleven operation steps. A method for inversely casting a valve body is adopted, and the sealing surface in the valve body is connected with the ingate, so that pouring liquor coagulation time of a sealing surface part can be delayed, the precision of the sealing surface is improved, the principle that the important surface faces downwards in foundry practice is satisfied, the yield can be increased by 7-10%, and the after-treatment cost can be reduced by 10-30%; and meanwhile, the bottom is free of a quality problem, and materials and labor power can be saved.

Description

technical field [0001] The invention relates to the field of valve body lost foam casting, in particular to a valve body lost foam and its use method. Background technique [0002] There are several bolt packs on the waist flange of the valve body casting, so the traditional sand core casting and the conventional lost foam casting have some shrinkage defects, and this defect can only be found after processing, which not only causes waste of processing costs, It will cause delivery delays when there are batches of waste products, and even if risers are added, it cannot be completely guaranteed that there are no defects. [0003] Traditional sand core casting adopts horizontal parting casting, adding a large riser to the top of the flange of the upper mold to avoid shrinkage. However, this method has a low yield rate, and the workload in the later stage is also large, and the cost is high. Conventional lost foam In the casting process, the traditional large mouth is facing up...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/04B22C9/08
Inventor 刘祥李玉明
Owner 埃维柯精密铸造(安徽)有限公司
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