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Sand mold riser seat and application thereof

A riser seat and sand mold technology, applied in the field of sand mold casting, can solve the problems of increasing cutting and grinding time, affecting product quality, shrinkage porosity and cracks, etc., to increase the utilization value, improve the utilization rate of molten steel, and reduce shrinkage porosity. Effect

Pending Publication Date: 2022-07-22
山东燕山精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current riser generally creates a hole communicating with the cavity during molding, such as figure 1 As shown, the contact surface between the material head in the riser and the casting is relatively large during feeding, which increases the cutting and grinding time in the later stage and reduces the yield; at the same time, shrinkage and shrinkage cracks are prone to occur at the contact part between the casting and the material head, which affects the product. quality

Method used

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  • Sand mold riser seat and application thereof
  • Sand mold riser seat and application thereof
  • Sand mold riser seat and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A method for casting a circular valve plate, comprising the following steps:

[0043] (1) Matching molding sand; the raw materials of molding sand are composed of the following components by weight: 70% of pearl sand, 15% of scrap steel shot, 10% of basic phenolic resin, 5% of aliphatic amine; particle size of pearl sand is 40-70 mesh, scrap steel Pill diameter ≦ 0.1mm;

[0044] (2) Lower box modeling; specifically, lower box modeling is to put the pattern into the lower box, and put molding sand in the lower box to complete the lower box modeling;

[0045] (3) Preparation of sand mold riser seat; the raw material of the sand mold riser seat is composed of the following components by weight: 70% of pearl sand, 15% of scrap steel shot, 10% of basic phenolic resin, 5% of fatty amine; particle size of pearl sand 40-70 mesh, the diameter of scrap steel shot is ≤ 0.1mm; the sand mold riser seat is formed by mixing the above raw materials and adding it into the mold to solid...

Embodiment 2

[0050] A method for casting a circular valve plate, comprising the following steps:

[0051] (1) Matching molding sand; the raw materials of molding sand are composed of the following components by weight: 80% of pearl sand, 10% of scrap steel shot, 7% of basic phenolic resin, 3% of fatty amine; the particle size of pearl sand is 40-70 mesh, scrap steel Pill diameter ≦ 0.1mm;

[0052] (2) Lower box modeling; specifically, lower box modeling is to put the pattern into the lower box, and put molding sand in the lower box to complete the lower box modeling;

[0053] (3) Preparation of sand mold riser seat; the raw material of the sand mold riser seat is composed of the following components by weight: 80% of pearl sand, 10% of scrap steel shot, 7% of basic phenolic resin, and 3% of aliphatic amine; The mouth seat is made by mixing the above raw materials and adding it into the mold to solidify for 5-10min;

[0054](4) Upper box modeling, place the sand mold riser seat on the pat...

Embodiment 3

[0058] A method for casting a circular valve plate, comprising the following steps:

[0059] (1) Matching molding sand; the raw materials of molding sand are composed of the following components by weight: 75% of pearl sand, 13% of scrap steel shot, 8% of basic phenolic resin, 4% of fatty amine; particle size of pearl sand is 40-70 mesh, scrap steel Pill diameter ≦ 0.1mm;

[0060] (2) Lower box modeling; specifically, lower box modeling is to put the pattern into the lower box, and put molding sand in the lower box to complete the lower box modeling;

[0061] (3) Preparation of sand mold riser seat; the raw material of the sand mold riser seat is composed of the following components by weight: 75% of pearl sand, 13% of scrap steel shot, 8% of basic phenolic resin, and 4% of fatty amine; The mouth seat is formed by mixing the above raw materials and adding them to the mold to solidify for 5-10 minutes; the particle size of the pearl sand is 40-70 mesh, and the diameter of the ...

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Abstract

The invention discloses a sand mold riser base. The sand mold riser base is prepared from, by weight, 70%-80% of ceramsite, 10%-15% of waste steel shots, 7%-10% of resin and 3%-5% of a curing agent. The sand mold riser base is formed by uniformly mixing the raw materials and then adding the raw materials into a mold for curing and molding. The middle hole of the sand mold riser base is the conical hole with the wide top and the narrow bottom, the bottom of the conical hole makes contact with a casting, the contact area is reduced, the cutting and polishing time is shortened, and the yield is increased by 20%; the sand mold riser seat prepared from the raw materials in a specific ratio is in contact with a casting at a feeding part, so that the phenomena of shrinkage porosity, shrinkage cavity and crack at the contact part of the casting and a material head are reduced, and the product quality is ensured.

Description

technical field [0001] The invention relates to the technical field of sand casting, in particular to a sand mold riser seat and its application. Background technique [0002] Sand casting is the most traditional casting method. Due to its own characteristics (not limited by the shape, size, complexity and alloy type of parts, short production cycle and low cost), sand casting is still the most widely used casting method in foundry production. The basic process of the traditional sand casting process has the following steps: sand preparation, mold making, core making, molding, pouring, sand falling, grinding processing, inspection and other steps. [0003] In sand casting, it is necessary to place risers at the hot nodes, wall thickness and high end of the castings for exhausting, feeding and slag collection of the castings according to the requirements of the castings. The current riser is generally a hole that communicates with the cavity during modeling, such as figure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/08B22C9/02
CPCB22C9/088B22C9/02
Inventor 张立军卜俊海史立克陈坤亓国瑞曹乃红宫文国
Owner 山东燕山精密机械有限公司