Founded in 2014, JUNLONG Machinery Co., Ltd. has established itself as an industry-leading OEM partner for high-precision investment castings and post-cast finished component machining.
Headquartered in Weifang, Shandong, our facility covers an expansive 60,000 square meters, utilizing cutting-edge automated wax-injection and shell-building systems. We specialize in producing complex, high-tolerance components utilizing premium carbon steel, alloy steel, and stainless steel. Operating at an annual production capacity of 20,000 tons, our processes integrate complete chemical, mechanical, and non-destructive testing directly within the factory gates.
By housing over 200 dedicated production professionals alongside our specialized team of 30+ metallurgical and engineering technicians, we ensure every detail from fluid simulation to high-precision CNC multi-axis milling is controlled under a single responsibility node.
Modern infrastructure, smart mining, and global cargo handling operations run on the structural integrity of heavy equipment. Excavators, crawler tractors, backhoes, and mobile cranes must endure relentless cycling loads, structural vibrations, and abrasive soil contact. Traditionally, heavy-weld assemblies and drop-forged components were the default answers. However, modern engineering requirements call for complex geometric configurations with interior cavities, undercuts, and customized weight reduction—goals that are unattainable through standard fabrication.
This shift has positioned precision investment casting (lost wax casting) as the premier manufacturing route. Today, the global commercial status of precision castings is expanding rapidly as OEMs seek parts that combine high tensile strength with near-net-shape dimensional accuracy right out of the mold. The transition toward high-alloy and stainless steel formulations is accelerating, driven by demands from the energy, infrastructure, and heavy transport sectors.
Minimizing raw material wastage and secondary machining cycles. Modern lost wax castings provide tolerance bands conforming to ISO 8062-3 DCTG6-DCTG8 standards, reducing post-cast material removal requirements.
Widespread implementation of vacuum-refined and gas-purged melting, together with micro-alloying elements like vanadium, titanium, and nickel to push the envelope of fatigue resistance.
Using finite element analysis (FEA) and mold flow simulators to model thermal solidification profiles before pouring. This pre-analysis systematically eliminates micro-porosity and hot tearing.
JUNLONG Machinery is not merely a casting house. We are a comprehensive engineering partner. We take pride in overseeing a completely integrated value stream that controls quality at every critical milestone.
By consolidating these segments, we eliminate typical multi-factory delay patterns, guarantee continuous material traceability, and provide a single point of quality contact.
Tight tolerances, smooth surface profiles, and customizable steel compositions.
High dimensional accuracy using lost wax technology for complex equipment structures.
High pressure containment and wear-resistant alloy compositions.
Specifically optimized for maximum toughness and long cycle operations.
Cost-effective structural components with high load capabilities.
Engineered to endure extreme outdoor weathering and soil abrasiveness.
Different working environments impose distinct metallurgical requirements on castings. At JUNLONG Machinery, our engineering technicians formulate materials optimized for specific operational stresses:
Components: Excavator bucket teeth, structural swing arms, linkages, and heavy wear plates.
Material Strategy: Low-alloy manganese steel or chromium-molybdenum steel. We apply specialized quenching and tempering treatments to achieve a hard exterior layer that resists wear, combined with a tough core that absorbs impacts without fracturing.
Components: Downhole ESP cable protector clamps, fluid valve bodies, and marine vessel anchor brackets.
Material Strategy: High-grade duplex stainless steel (e.g., CF8M / 316) and structural carbon steel with protective coatings. These compositions are engineered to resist chloride stress corrosion cracking in corrosive offshore environments.
Components: Photovoltaic bracket connectors, railway switch system linkages, and forklift steering knuckles.
Material Strategy: High-precision carbon and alloy steels conforming to TS16949 standards. These parts are optimized for high-volume fatigue resistance under cyclic wind and mechanical loading profiles.
Construction machinery like loaders, bulldozers, and crawler drills requires components that maintain dimensional accuracy under high physical stress. The core competitive advantage of our casting process lies in our grain structure refinement during solidification.
Through precise gate control and thermal insulation, we prevent directional cooling defects. The resulting cast components are highly resilient and structurally consistent, enabling them to operate reliably in sub-zero arctic mining operations or high-temperature desert construction sites.
As the manufacturing sector moves toward digitalization and lower carbon footprints, precision casting is undergoing significant technological transitions. At JUNLONG Machinery, our engineering roadmap focuses on three main technological goals:
To guarantee zero-defect parts for critical machinery components, JUNLONG operates an internal laboratory that performs a wide range of physical, chemical, and non-destructive tests:
Spectrochemical analysis ensures each steel, alloy, or stainless batch matches exact specified values before pouring.
Tensile testers, impact test rigs, and hardness instruments verify strength, yield points, and wear properties.
Ultrasonic, Magnetic Particle, and Liquid Penetrant testing identify subsurface porosities and internal defects.
We maintain strict process control at every stage. Our facility is certified to the following international standards:
Advanced production equipment ensures consistent, high-precision manufacturing. Our key facilities include:
Partner with an experienced Chinese manufacturer to reduce production costs and improve lead times. Send your drawings to our team for a detailed engineering analysis and quote within 24 hours.
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