We specialize in high-quality castings produced using the three mainstream molding processes: Resin Sand, Clay Sand (Green Sand), and Shell Molding Sand—widely used in energy, transportation, heavy industry, pumps & valves, and construction machinery. By selecting the optimal process based on product requirements, we ensure the best balance between dimensional accuracy, surface finish, mechanical properties, and production efficiency.

Resin Sand Castings: Ideal for medium-to-large complex components—dimensionally stable, smooth surface, dense internal structure, suitable for automated production.

Clay Sand Castings: Low cost, high throughput—ideal for high-volume, medium-precision general-purpose castings.

Shell Molding Castings: High precision, excellent surface finish—perfect for small precision or thin-walled complex castings.

Resin Sand Castings
High Dimensional Stability: High mold rigidity minimizes casting distortion—ideal for precision blanks prior to CNC machining.
Superior Internal Quality: With riser simulation and directional solidification, shrinkage defects are minimized—X-ray inspection meets GB/T 5677 Class II.
Excellent for Complex Structures: Capable of deep cavities, internal ribs, and multi-hole designs—supports integrated casting, reducing weldments.
Automated Production: Integrates with robots, conveyors, and in-line inspection for smart foundry operation.
 
Clay Sand Castings
Significant Cost Advantage: Low raw material cost, high sand reuse rate (≥95%)—ideal for high-volume, cost-sensitive production.
High Production Efficiency: Fast molding (1–3 sec/mold), stable rhythm—perfect for continuous production lines.
Mature & Reliable Process: Widely adopted, easy to maintain—suitable for mass production of standard castings.
High Adaptability: Handles castings from 1 kg to 15 t—widely used in automotive, agricultural, and general machinery.
 
Shell Molding Castings
Ultra-Fine Surface Finish: Low roughness, minimal flash—reduces or eliminates shot blasting and grinding.
High Dimensional Accuracy: Tight tolerances, small machining allowance (1.5–2.5 mm)—saves material and machining cost.
Ideal for Thin-Wall & Fine Features: Capable of producing 3–5 mm wall thickness components like gears, nozzles, and sensor housings.
Low Gas Generation, Clean Castings: Minimal gas evolution reduces porosity—high internal cleanliness.

Available in a wide range of materials:

Gray Iron: HT200, HT250, HT300 (EN-GJL-200, 250, 300)
Ductile Iron: QT400-15, QT500-7, QT600-3, QT700-2 (EN-GJS-400, 500, 600, 700)
Carbon & Alloy Steel: ZG230-450, ZG310-570, ZG20CrMo, ZG15Cr1Mo1V (GS-25, 38, 20Mn5, 13CrMo4-5)
Stainless Steel: ZG06Cr13, ZG06Cr19Ni9, ZG12Cr18Ni9 (G-X6Cr13, G-X6CrNi18-9)
Special Alloy Irons: Abrasion-resistant, heat-resistant, corrosion-resistant cast irons

Energy & Power: Wind turbine hubs, hydro turbine casings, steam turbine supports, nuclear pumps & valves

Transportation: Engine blocks, transmission housings, rail bogies, marine parts

Pumps & Valves: Centrifugal pump casings, gate valves, ball valves, butterfly valves, control valves

Construction Machinery: Excavator undercarriage, bulldozer brackets, loader linkages

General Machinery: Gearbox housings, couplings, flywheels, gearboxes

Qingdao Dingli Machinery Co., Ltd. is a company specializing in the production of casting machinery equipment. It mainly manufactures equipment for casting clay sand, resin sand, coated sand, wet sand drying, lost foam casting, sodium silicate sand, etc. It can undertake various turnkey projects, including the design, manufacturing, installation and commissioning of mechanical sand processing. Our factory has strong technical strength and advanced processing equipment. We have long-term and close technical cooperation with many senior experts and scholars from domestic universities and research institutions. We can provide users with high-performance, reliable products and satisfactory services.
Our company adheres to the principles of promoting enterprise development through technology, prioritizing quality, continuous improvement and customer satisfaction. We are willing to sincerely cooperate with friends from all walks of life to achieve common prosperity.
Our company mainly undertakes the following projects:
20-180t/h mechanized clay sand processing production line and single machine equipment turnkey project.
Annual production of 1000 to 20,000 tons of consolidated resin sand casting mechanized production line and single machine equipment turnkey project.
Annual production of 3,000 to 10,000 tons of hot processing coated sand complete equipment and single machine equipment turnkey project.
Annual production of 3,000 to 7,000 tons of hot coating sand regeneration complete equipment and single machine equipment turnkey project.
5-15t/h sodium silicate mechanical production line and single machine equipment turnkey project.
5-30t/h three-stage sand drying equipment and single machine equipment turnkey project.
5-40t/h lost foam casting complete equipment and single machine equipment turnkey project and other types of shot blasting cleaning equipment, lifting equipment, conveying equipment, cooling equipment, magnetic separation equipment, environmental protection dust removal equipment.
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