Double Screw Volumetric Feeder

Volumetric feeder is mainly composed of feeding device, weighing device, discharging device, weight display controller and other components. It is a feeding equipment that conveys materials of fixed volume into the target tank, and is widely used in powder batching processes such as plastic granules, powder, calcium carbonate, talc powder, resin film powder and granules, flour, starch, etc. As a professional volumetric feeding solution, it is suitable for various powder material handling scenarios in industrial production.According to the difference in material fluidity, it is recommended to choose single-screw volumetric feeder for materials with good fluidity, and double-screw volumetric feeder for materials with poor fluidity. This material-specific selection principle helps to improve the feeding efficiency and stability of the volumetric feeder, meeting the production needs of different enterprises.When the bulk density of materials is uniform and the quality of the final product has no strict requirements on feeding accuracy, volumetric feeder provides a low-cost and simple feeding solution for continuous and intermittent feeding applications. For manufacturers, production line engineers and procurement personnel in related industries, this cost-effective volumetric feeding equipment can effectively reduce production costs while ensuring basic feeding needs.

Double-screw volumetric feeder is widely applicable to various materials, including providing volumetric feeding solutions for powdery, fibrous and flaky materials with poor fluidity. As a high-performance volumetric feeder, it solves the feeding problem of materials with poor fluidity, which is highly favored by manufacturers and procurement personnel in industries that deal with difficult-to-feed materials.All parts in contact with materials of the double-screw volumetric feeder are made of stainless steel. This double-screw volumetric feeder is easy to clean and replace parts, which not only ensures the hygiene of materials in the feeding process but also reduces the maintenance difficulty for production line engineers, conforming to the practical needs of industrial production.Similar to the single-screw type, the double-screw volumetric feeder also has a unique spherical hopper design, which allows materials to flow into the screws uniformly from all directions in the spherical hopper, effectively preventing material accumulation. The horizontal stirring further improves the flow of materials to the screw propulsion part, making the feeding more accurate. This design ensures that the double-screw volumetric feeder can maintain stable feeding performance even when handling materials with poor fluidity.When feeding materials with poor fluidity and easy bridging, vertical stirring can also be considered for the double-screw volumetric feeder. The optional vertical stirring device further enhances the anti-bridging performance of the double-screw volumetric feeder, making it more adaptable to complex material feeding requirements and providing a more comprehensive volumetric feeding solution for enterprises.

Working Principle:

Volumetric feeder is composed of a hopper, a feeder (single or double-shaft screw feeder), a weighing system and a regulator. During operation, the hopper, materials and feeder are continuously weighed together. This integrated design of the volumetric feeder ensures the accuracy of the feeding process and lays a foundation for stable feeding.As materials are delivered, the actual weight loss rate of the volumetric feeder is measured and compared with the required weight loss rate (set value). This real-time monitoring and comparison mechanism helps to timely find deviations in the feeding process and ensure the stability of the feeding rate.The volumetric feeder automatically corrects the deviation from the set point by adjusting the feeder speed, so that it can continuously feed materials uniformly and accurately. This automatic adjustment function reduces the manual operation intensity of production line engineers and improves the automation level of the production line, which is an important advantage of the volumetric feeder in industrial applications.

Application Scope:

• Food Industry: The volumetric feeder is used in the batching and feeding processes of cereals, oatmeal nut energy bars, sugar mixtures, milk powder, dietary breakfast drinks, iodized salt, fluorinated products and aromatized products. In the food industry with strict requirements on material hygiene, the stainless steel parts in contact with materials of the volumetric feeder can ensure food safety, which is trusted by food manufacturers.
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• Chemical Industry: In the chemical industry, the volumetric feeder is widely used in the feeding of extrusion premixes, detergents, pesticides, fertilizers and building materials. Its stable feeding performance and corrosion-resistant materials (such as stainless steel) make it suitable for the harsh working environment of the chemical industry, meeting the production needs of chemical enterprises.
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• Pharmaceutical Industry: The volumetric feeder plays an important role in the production of vitamins and active ingredients in the pharmaceutical industry. The easy-to-clean and hygienic design of the volumetric feeder conforms to the GMP requirements of the pharmaceutical industry, ensuring the purity and quality of pharmaceutical products.
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• Plastic Industry: In the plastic industry, the volumetric feeder is applied to the processing of plastics, films and coatings. It can accurately feed plastic granules, resin powder and other materials, ensuring the stability of product quality in the plastic processing process and being an essential equipment for plastic manufacturers.
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• Environmental Field: The volumetric feeder is also used in the environmental field, such as in the feeding of materials for waste gas purification, water treatment and diesel particulate filters. Its reliable performance helps to improve the efficiency of environmental treatment equipment, contributing to environmental protection.

Advantages:

• The feeding part of the volumetric feeder is easy to disassemble, clean, replace and maintain. This advantage reduces the maintenance cost of enterprises and improves the service life of the volumetric feeder, which is highly recognized by procurement personnel.
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• The combination of horizontal stirring and optional vertical stirring device of the volumetric feeder solves the problem of material bridging. This anti-bridging advantage ensures the continuous and stable operation of the production line, reducing the production losses caused by material blockage.
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• The volumetric feeder adopts a universal screw interface, which makes screw replacement convenient and prevents material accumulation at the root of the screw. This design not only improves the flexibility of the volumetric feeder but also avoids material waste and ensures the accuracy of feeding.
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• The volumetric feeder is equipped with an aluminum transmission box, which has a good heat dissipation effect. Good heat dissipation ensures the stable operation of the transmission system of the volumetric feeder, reducing the failure rate caused by overheating and improving the reliability of the equipment.
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• The parts of the volumetric feeder in contact with materials are made of 304/316 stainless steel. 304/316 stainless steel has good corrosion resistance and hygiene, which is suitable for various industries with different material characteristics and ensures the safety and purity of materials.
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• The seals of the volumetric feeder are made of silicone rubber/nitrile rubber/PTFE. These high-quality seal materials ensure the sealing performance of the volumetric feeder, preventing material leakage and external pollution, and adapting to different material and environmental requirements.
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• The discharge port of the volumetric feeder can be equipped with an optional quick-release structure, which is convenient for material replacement. This design is especially suitable for production lines that need to switch between multiple materials, improving the production efficiency of the enterprise and enhancing the adaptability of the volumetric feeder.

Maintenance:

• The bearing bears the entire load of the volumetric feeder. Therefore, good lubrication is crucial to the service life of the bearing, which directly affects the service life and operation rate of the volumetric feeder. Thus, the lubricating oil injected must be clean and the seal must be good. The main oil injection points of the volumetric feeder include: rotating bearings, roller bearings, all gears, movable bearings and sliding planes. Production line engineers should regularly check and maintain these parts to ensure the normal operation of the volumetric feeder.
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• The newly installed hoops of the volumetric feeder are prone to loosening and must be checked frequently. Regular inspection of the hoops can prevent safety accidents caused by loosening and ensure the stable operation of the volumetric feeder.
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• Pay attention to whether all parts of the volumetric feeder work normally. Timely discovery and solution of abnormal problems in each part can avoid the expansion of faults and reduce the maintenance cost of the enterprise.
• Pay attention to checking the wear degree of the easily worn parts of the volumetric feeder and replace the worn parts in a timely manner. Replacing worn parts in time can ensure the feeding accuracy and efficiency of the volumetric feeder and prevent the impact of damaged parts on the entire production line.
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• Dust and other substances under the base of the movable device of the volumetric feeder should be removed to prevent the movable bearing from being unable to move on the base when the machine encounters unbreakable materials, which may lead to serious accidents. This maintenance measure is of great significance to ensure the safety of the production line and the volumetric feeder.
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• If the oil temperature of the bearing of the volumetric feeder rises, the machine should be stopped immediately to check the cause and eliminate it. High bearing oil temperature may indicate problems such as poor lubrication or bearing damage, and timely handling can avoid further damage to the volumetric feeder.
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• If there is an impact sound when the rotating gear of the volumetric feeder is running, the machine should be stopped immediately for inspection and elimination. Abnormal sounds of gears may be caused by gear wear or improper meshing, and timely inspection and maintenance can ensure the normal operation of the transmission system of the volumetric feeder.