The Screw Feeder is a continuous volumetric conveying device widely used in industrial applications such as resin sand mixing systems, coated sand lines, cement batching, powder modification, biomass fuel, flue gas desulfurization, chemical reactor feeding, etc., for stable, uniform, and controllable feeding of bulk materials like base sand, powders, granules, and additives. Utilizing a rotating screw shaft to propel material, combined with frequency control, weight feedback, and intelligent control, it enables applications ranging from coarse feeding to high-precision dosing—making it an essential conveying and metering unit in automated production lines.

Available in horizontal, inclined (≤20°), or vertical (short-distance) configurations, this screw feeder series can be customized based on material properties, capacity, and space requirements, with a conveying capacity of 0.1–100 m³/h. It is suitable for various operating conditions including ambient, high-temperature, corrosive, and abrasive environments. Its compact structure and excellent sealing prevent dust leakage, meeting environmental and safety standards.

1. Continuous & Stable Feeding
Driven by a motor, the rotating screw shaft continuously conveys material in a U-trough or tubular housing, ensuring pulse-free, uniform, and stable discharge—eliminating "material interruption" or "surge feeding".

Precise base sand feeding for resin sand mixers

Metering addition of resin and hardener in coated sand lines

Powder batching systems for cement, fly ash, lime

Continuous fuel feeding for biomass boilers and coal-fired power plants

Reactor feeding systems in chemical and pharmaceutical industries

Limestone/urea powder conveying in FGD/SCR systems

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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