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Qingdao Hailong Machinery Technology Co., Ltd. is one of the leading manufacturers and suppliers of sand casting molds in China, featured by quality products and good service. Welcome to buy durable sand casting molds made in China here and get pricelist from our factory. Also, customized service is available.

Core Product Features

Diversified Materials & On-demand Adaptation: Available materials include wooden mold, aluminum alloy mold, cast iron mold, resin mold, etc. Wooden mold is cost-effective and easy to process, suitable for single-piece/small-batch production; aluminum alloy mold has excellent thermal conductivity and light weight (density 2.7g/cm³), service life ≥5000 cycles, suitable for medium-batch production; cast iron mold has high strength (tensile strength ≥250MPa) and wear resistance, service life ≥10000 cycles, applicable to mass production; resin mold has high precision and fast forming, suitable for complex structure castings.
Complex Structure Adaptation & Precise Forming: Optimized for special-shaped parts, hollow structures and multi-cavity castings, cavity dimensional tolerance ≤±0.1mm/m, surface roughness Ra≤3.2μm. It can realize integrated forming of complex flow channels, reinforcing ribs and reserved holes, reducing subsequent processing procedures, with casting qualification rate ≥98%.
Process Optimization & Cost Control: Adopt CAD/CAE simulation to simulate filling and solidification process, optimize gating system, riser and exhaust system layout, reducing casting shrinkage and porosity defect rate. Mold manufacturing cycle is shortened by 20% compared with traditional processes, and single mold cost is reduced by 15%-30%, showing significant cost-performance advantage for small and medium-batch production.
Wear & High-temperature Resistance & Long-term Stability: Metal mold surface is treated with nitriding and quenching, hardness ≥HRC45, temperature resistance range 200℃-800℃ (adjusted according to materials); wooden/resin mold is treated with moisture-proof and anti-corrosion processes, adapting to humid environment of sand casting workshop, service life increased by 30% compared with ordinary molds.
Full-scenario Customization & Flexible Adaptation: Suitable for producing castings of various materials such as gray iron, ductile iron, aluminum alloy and carbon steel. It can accurately customize cavity structure, parting surface and positioning pin holes according to customer casting drawings, meeting forming needs of automotive parts, mechanical accessories, construction machinery components and other scenarios.

Core Process Advantages

Integrated Design & Simulation: In-house professional design team uses 3D software such as UG and Pro/E for modeling, combined with MAGMA casting simulation analysis to avoid casting defects in advance. Mold test pass rate ≥95%, and sampling cycle is shortened by 25%.
Full-process Quality Control: Raw materials undergo mechanical property testing and material spectral analysis; mold processing process real-time monitors cutting parameters and heat treatment process; finished products pass dimensional accuracy testing and cavity surface quality inspection. Complete test reports are provided for each batch with traceable quality.
Flexible Production Capacity: Equipped with advanced equipment such as CNC milling machines, machining centers and EDM machines, it can undertake various order types including single-piece customization, small-batch trial production and mass production. Mold manufacturing precision reaches ±0.05mm, adapting to production of castings with different complexities.

Application Scenarios

Automotive Industry: Engine brackets, gearbox housings, rear axle housings, chassis connectors and other cast iron/aluminum alloy castings.
Construction Machinery: Excavator bucket teeth, loader connecting rods, crane bases, hydraulic valve blocks and other high-strength castings.
General Machinery: Pump bodies, valve bodies, gearbox housings, motor end covers and other general mechanical parts.
Agricultural Machinery: Tractor hubs, harvester blade seats, agricultural machinery brackets and other wear-resistant castings.
Other Fields: Medical device accessories, marine parts, construction machinery accessories and other complex structure castings.

Typical Application Cases

Automotive Parts - Engine Bracket Mold: Customized HT200 cast iron sand mold for an automotive enterprise, cavity adapted to complex hollow structure, casting dimensional tolerance ±0.08mm. 50,000 castings have been mass-produced, with no obvious mold wear and defect rate ≤1%.
Construction Machinery - Hydraulic Valve Block Mold: Supplied aluminum alloy sand mold, optimized internal flow channel design, casting porosity defect rate reduced to below 0.5%, adapted to ductile iron valve block production. Applied to 3,000 excavators, mold life exceeds 8,000 cycles.
General Machinery - Pump Body Mold: Customized resin sand mold, simulation optimization for complex flow channels of pump body. Mold manufacturing cycle is only 12 days, casting machining allowance reduced by 2mm, customer production efficiency improved by 40%, with annual supply of over 200 sets of molds.

Quality Assurance

Test Reports: Provide raw material quality reports, mold dimensional accuracy test reports, heat treatment process reports, cavity surface quality test reports, etc.
After-sales Commitment: For non-human damage, mold warranty is 1 year or agreed cycles (whichever comes first); provide free mold maintenance guidance, test mold technical support and lifelong mold repair services.
Quality Standards: Strictly comply with industry standards such as GB/T 6414 Casting Dimensional Tolerance Standard, GB/T 9439 Gray Iron Castings Standard and JB/T 5105 Technical Conditions for Casting Molds.

Main Technical Specifications (Standard Models)

Parameter Type	Specification Range
Mold Material	Wooden Mold, Aluminum Alloy (A356/ADC12), Cast Iron (HT200/HT250), Resin Mold, etc.
Adaptable Casting Material	Gray Iron, Ductile Iron, Aluminum Alloy, Carbon Steel, Copper Alloy, etc.
Key Accuracy	Cavity Dimensional Tolerance ≤±0.1mm/m;Surface Roughness Ra≤3.2μm;Mold Manufacturing Precision ±0.05mm
Service Life	Wooden Mold ≥500 Cycles;Aluminum Alloy Mold ≥5000 Cycles;Cast Iron Mold ≥10000 Cycles
Temperature Resistance Range	200℃-800℃ (Adjusted according to mold material)
Adaptable Casting Weight	0.5kg-500kg (Customizable)
Customization Range	Cavity Structure, Parting Surface, Gating System, Exhaust System can be customized