Loss-in-weight metering feeding is a commonly used feeding method in double-stage granulators, which has the following advantages compared with the traditional quantitative feeding method:   1. Accurate metering: Loss-in-weight metering feed can achieve accurate metering of raw materials through the principle of gravity and weighing. It uses load cells or weighing instruments to measure the weight of the raw material to accurately determine the amount of material to be fed at a time. Compared to dosing, loss-in-weight dosing allows for more precise control of the amount of raw material input, ensuring that each batch of pellets has the same recipe and composition.   2. Real-time adjustment: Loss-in-weight metering systems are usually equipped with controllers and feedback mechanisms that allow real-time adjustments to be made based on actual feeding conditions. By constantly monitoring and comparing the difference between the actual feed quantity and the set target value, the system can automatically adjust the feed speed and time to achieve accurate metering and control. This real-time adjustment feature ensures consistent quality and composition of pellets from batch to batch.   3. Easy to operate: Loss-in-weight metering and feeding systems typically feature user-friendly interfaces and operator control panels for easy setup and monitoring by the operator. Operators can adjust feeding parameters such as target weight, feeding time and speed as needed to meet different production requirements. In addition, the loss-in-weight metering and feeding system can also record and store feeding data for subsequent quality management and traceability.   4. Efficient and Reliable: Loss-in-Weight Metering Feeding System can realise high-speed and continuous feeding process to improve production efficiency and capacity. At the same time, it has high reliability and stability, and can maintain consistent metering accuracy and performance over a long period of operation. This high efficiency and reliability makes loss-in-weight weighing metering and feeding widely used in high-volume and continuous production scenarios.   In summary, the loss-in-weight metering feeding system has the advantages of accurate metering, real-time adjustment, easy operation and high efficiency and reliability in a two-stage granulator. It can provide accurate metering of raw materials, ensure consistent quality and composition of granules in each batch, and improve production efficiency and quality control.

CaCO3 powder, also known as calcium carbonate powder, is commonly added to plastic pellets for several reasons: 1. Cost reduction: CaCO3 powder is an inexpensive filler material compared to pure plastic resin. By incorporating CaCO3 powder into plastic pellets, manufacturers can reduce the amount of expensive plastic resin required while maintaining the bulk volume of the plastic. This helps to lower the production cost of plastic products. 2. Improved mechanical properties: CaCO3 powder can enhance the mechanical properties of plastic materials. When added in appropriate amounts, it can increase the stiffness, strength, and impact resistance of the resulting plastic products. The presence of CaCO3 powder can improve the dimensional stability and reduce shrinkage of plastic parts during processing and use. 3. Density adjustment: The addition of CaCO3 powder allows manufacturers to adjust the density of plastic products. CaCO3 is a high-density material compared to most plastic resins. By adding it to plastic pellets, the overall density of the resulting plastic can be increased or decreased, depending on the desired application. This can be beneficial for achieving specific weight requirements or balancing the weight distribution of plastic products. 4. Processing improvement: CaCO3 powder can act as a processing aid during the plastic manufacturing process. It helps to improve the flow properties of the molten plastic, facilitating better mold filling and reducing the chances of defects such as voids or sink marks. The presence of CaCO3 powder can also help to control the cooling rate of the plastic, preventing warping or deformation after molding. 5. Environmental benefits: The addition of CaCO3 powder to plastic pellets can contribute to the reduction of carbon footprint. Due to its lower cost and availability, CaCO3 powder is often used as a filler material instead of relying solely on plastic resins. This approach reduces the consumption of fossil fuel-based plastics and promotes a more sustainable use of resources. 6. Improvement of heat resistance of plastic products: Adding CaCo3 powder to common plastic products can improve the heat resistance of plastic products. If about 40% of CaCo3 powder is added to PP, its heat resistance can be increased by about 200℃. When the filling rate is less than or equal to 20%, the heat resistance can be increased by 8~130℃.  7. Improve the light diffusion of plastics: Calcium carbonate powder with whiteness above 90 has obvious whitening effect in plastic products. In calcium plastic paper, in low-density polyethylene and high-density polyethylene film, the addition of calcium carbonate powder can achieve the effect of light diffusion and extinction, making it suitable for writing and printing. Calcium carbonate powder with better whiteness can also replace expensive white pigments. 8. It can make the products have some special properties: adding calcium carbonate powder can improve the plating and printing performance of some products. Adding trace amount of calcium carbonate powder in PVC has certain flame retardant effect.   It's important to note that the specific amount of CaCO3 powder added to plastic pellets and the desired effects may vary depending on the application, required properties, and the type of plastic being used. Manufacturers conduct thorough testing and formulation adjustments to achieve the desired performance and cost-efficiency in their plastic products.   GSmach's extruder greatly meets the production of calcium carbonate masterbatch, whether it is a two stage pelletiser or twin screw pelletiser, the capacity and quality of masterbatch is also very high, buy plastic extruder must be recognised GSmach!