Ningbo Yinzhou Hisea Machinery Co.,Ltd.
7、Shell Casting Details Page
Principles and processes of craftsmanship
1. Preparation of coated sand:
Quartz sand+thermosetting phenolic resin (binder)+Urotropin (curing agent)+Calcium stearate (lubricant) → Mix evenly to make coated sand.
2. Shell making:
Template preheating: Heat the metal template to 230-300 ℃.
Sand covered crust: Template buckle film sand box, flip to make the sand particles adhere to the hot template, and the resin melts.
Curing and shaping: Keep heating, the resin crosslinks and solidifies to form a hard thin shell.
Demoulding and shell removal: The ejector mechanism separates the sand shell from the template.
3. Shell type combination:
Assemble the two halves of the shell into a complete cavity using fixtures or resin adhesives.
4. Pouring and Cooling:
Place the shell into a sand box filled with sand support, pour molten metal, and cool to solidify.
5. Shedding and cleaning:
Crush the sand shell, remove the casting, and clean the burrs.
Advantages:
1. Dimensional accuracy:
The metal template ensures the stability of the cavity size, and the casting tolerance is significantly smaller than that of ordinary sand casting.
2. Surface smoothness:
The combination of fine coated sand and smooth template results in a delicate casting surface, reducing cleaning and machining costs.
3. High production efficiency and automation potential:
Short shell making cycle, suitable for assembly line operation;
Easy to achieve automation in shell making and molding, with an efficiency 5-10 times higher than manual sand molds.
4. Stable and consistent quality of castings:
The shell has high strength, is not easily deformed, and reduces sand flushing and box expansion defects;
Moderate breathability reduces the risk of porosity.
5. Good adaptability between materials and design:
Suitable for materials such as cast iron, cast steel, copper alloy, aluminum alloy, etc;
Can produce complex structures with small sand cores.
6. Cost savings:
The sand consumption is only 1/10 of that of green sand, and the old sand can be recycled and reused;
Reduce machining allowance and lower metal and labor costs.
Application areas:
1. Automotive components: crankshaft, camshaft, connecting rod, gear, rocker arm, small housing, brake drum.
2. Hydraulic and fluid systems: valve body, pump casing, fittings, hydraulic motor casing.
3. Construction machinery: sprockets, bushings, wear-resistant plates, small transmission components.
4. General machinery: gear blanks, flanges, pipe fittings, hardware tools (wrenches, pliers).
5. Agricultural machinery: seeder parts, harvesting blades, transmission box.
Here are some of our company's product displays:
Production & Processing
Zamac Alloy Casting Lighting Accessories Shell Mold Casting
Keyword:
Casting
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FAQ
Q
Can we have a tour of the factory?
A
We are more than happy to welcome visitors to our company to see our machining shop.
Q
How long do the products take?
A
The time from order confirmation to shipment will vary according to the inventory of the required products, processing and production, etc. The exact time can be confirmed by communication.
Q
In which port is the transportation?
A
Zhoushan Port, Ningbo.
Q
What methods of payment do we support?
A
T/T,
Contact Us
Tel: 86-574-87280269
Mobile: 86-13586680003
Fax: 86-574-87280276
E-Mail: info@nbhisea.com
Address: No.146 of Huaishu Road,Jiangbei Zone,Ningbo City,China.
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