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Commercial vehicle cylinder body water jacket cold core and preparation method thereof

A technology for cylinder water jackets and commercial vehicles, applied in cores, manufacturing tools, casting and molding equipment, etc., can solve the problems of high core-making cost, low core-making efficiency, poor quality of cylinder inner cavity, etc., and achieve core-making High efficiency, stable sand core quality and good formability

Pending Publication Date: 2022-07-22
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the problems of poor cylinder cavity quality, high core-making cost and low core-making efficiency existing in the prior art, and provide a commercial vehicle cylinder water jacket cooling core and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: a water jacket cold core for a commercial vehicle cylinder, the components are: 66kg of pearl sand, 34kg of quartz sand, 1.5kg of phenol urethane resin (0.825kg of phenolic resin, 0.675kg of polyisocyanate);

[0056] The above-mentioned raw material composition and physical and chemical indicators are: pearl sand: Al 2 O 3 %=79at.%, SiO 2 %=16at.%, Fe 2 O 3 %=3at.%, angle coefficient=1.0, acid consumption value=3.5mL / 50g, particle size 140 mesh and below=3wt.%, particle size 40+50+70+100 mesh=80wt.%, 40 / 50 / 70 / 100 mesh single sieve≤35wt.%; Quartz sand: SiO 2 %=93at.%, Fe 2 O 3 %=0.5at.%, conductivity=80uS / cm, mud content=0.1wt.%, acid consumption=3mL / 50g, ignition loss=0.2wt.%, particle size 50+70+100 mesh=90wt .%, 50 / 70 / 100 mesh single sieve≤48wt.%, 140 mesh and below=2wt.%, 40 mesh and above=9wt.%; Phenolic resin: density=1.10g / cm3, viscosity (25℃)= 25s; polyisocyanate: density=1.07g / cm 3 , viscosity = 15s.

[0057] A preparation method of a wa...

Embodiment 2

[0060] Embodiment 2: a water jacket cold core for a commercial vehicle cylinder, the components are: 66kg of pearl sand, 34kg of quartz sand, 1.5kg of phenol urethane resin (0.825kg of phenolic resin, 0.675kg of polyisocyanate);

[0061] The above-mentioned raw material composition and physical and chemical indicators are: pearl sand: Al 2 O 3 %=78at.%, SiO 2 %=12at.%, Fe 2 O 3 %=2at.%, angle coefficient=1.1, acid consumption value=4mL / 50g, particle size 140 mesh and below=2wt.%, particle size 40+50+70+100 mesh=85wt.%, 40 / 50 / 70 / 100 Mesh sieve≤35wt.%; Quartz sand: SiO2%=95at.%, Fe 2 O 3%=0.5at.%, conductivity=50uS / cm, mud content=0.2wt.%, acid consumption value=3mL / 50g, ignition loss=0.3wt.%, particle size 50+70+100 mesh=90wt .%, 50 / 70 / 100 mesh single sieve≤48wt.%, 140 mesh and below=2wt.%, 40 mesh and above=9wt.%; Phenolic resin: density=1.10g / cm3, viscosity (25℃)= 25s; polyisocyanate: density=1.07g / cm 3 , viscosity = 15s.

[0062] A preparation method of a water jack...

Embodiment 3

[0065] Embodiment 3: a water jacket cold core for a commercial vehicle cylinder, the components are: 66kg of pearl sand, 34kg of quartz sand, 1.5kg of phenol urethane resin (0.825kg of phenolic resin, 0.675kg of polyisocyanate);

[0066] The above-mentioned raw material composition and physical and chemical indicators are: pearl sand: Al 2 O 3 %=80at.%, SiO 2 %=15at.%, Fe 2 O 3 %=1at.%, angle coefficient=1.1, acid consumption value=4mL / 50g, particle size 140 mesh and below=2wt.%, particle size 40+50+70+100 mesh=85wt.%, 40 / 50 / 70 / 100 Mesh sieve≤35wt.%; quartz sand: SiO 2 %=95at.%, Fe 2 O 3 %=0.5at.%, conductivity=50uS / cm, mud content=0.2wt.%, acid consumption value=3mL / 50g, ignition loss=0.3wt.%, particle size 50+70+100 mesh=90wt .%, 50 / 70 / 100 mesh single sieve≤48wt.%, 140 mesh and below=1.5wt.%, 40 mesh and above=9wt.%; Phenolic resin: density=1.10g / cm3, viscosity (25℃) = 25s; polyisocyanate: density = 1.08 g / cm 3 , viscosity = 15s.

[0067] A preparation method of a ...

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PUM

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Abstract

The invention belongs to the technical field of engine body process materials, and relates to a commercial vehicle cylinder body water jacket cold core and a preparation method. The method comprises the following steps: selecting materials in percentage by weight: 66% of ceramsite, 34% of quartz sand, 1.5% of phenol urea resin, 0.825% of phenolic resin and 0.675% of polyisocyanate; adding ceramsite and quartz sand into a sand mixer at the same time, starting the sand mixer, starting to add phenolic resin when 3 / 4 of the sand is added, starting to add polyisocyanate 2-4 seconds after the phenolic resin is added, and starting to time for 40 seconds after the two-component resin is added; the sand core is excellent in high-temperature resistance and good in thermal stability, the inner cavity of the cylinder body water jacket is clean, the defects of sand burning, veins, sintering and the like are avoided, and the size precision of a casting is high; the core making formability is good, the percent of pass is higher than 97%, the core making efficiency is high, and the core making comprehensive cost is low; and the sand core has the advantages of few types of core making materials, stable sand core quality, low sand core gas generation, proper air permeability and few casting air holes or pound pressure leakage and other waste products.

Description

technical field [0001] The invention belongs to the technical field of engine block process materials, and relates to a commercial vehicle cylinder block water jacket cold core and a preparation method. Background technique [0002] With the gradual tightening of environmental protection requirements and the development of lightweight vehicles, the requirements for the wall thickness of commercial vehicle engine cylinders are getting smaller and smaller, and the quality requirements of the inner cavity are getting higher and higher; among them, the inner cavity of the cylinder body water jacket is used as the engine cooling water circulation position , the quality of its inner cavity plays a crucial role in the heat dissipation effect of the engine; the commercial vehicle cylinder block is poured with heavy molten iron, high molten iron temperature, complex structure, large volume and thin wall of the water jacket. Defects such as sticking sand and sintering, which increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00B22C1/22B22C5/04B22C9/12B22C15/24
CPCB22C1/00B22C1/2253B22C1/2273B22C5/0409B22C15/24B22C9/123
Inventor 李帅平马俊杰骆洋杜利峰孙继华刘世俊张佳强
Owner CHINA FIRST AUTOMOBILE