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2024-09-06 Does the rotational speed of the melt pump have any effect on the melt flow rate?
The rotational speed of the extruder melt pump has a direct and significant impact on the melt flow rate. The following is a detailed analysis of this impact: Direct Proportionality The flow rate of the melt pump exhibits a strict direct proportionality with its rotational speed. This means that as the rotational speed of the melt pump increases, the conveyed melt flow rate correspondingly increases; conversely, when the rotational speed decreases, the melt flow rate also decreases. This characteristic makes adjusting the rotational speed of the melt pump an effective means of controlling the
2024-09-03 Does the sheet extrusion production line need to use a melt pump?
The question of whether a extrusion gear pump is absolutely necessary for a sheet extrusion line does not have a definitive answer. It primarily depends on specific production needs, process conditions, and economic benefits, among other factors. Below is a detailed analysis of this issue: I. Role of Melt Pump in Sheet Extrusion Lines Stable Extrusion: The melt pump eliminates feeding errors from the feeding system and mitigates fluctuations transmitted from upstream processes, resulting in a more stable extrusion process. This enhances the dimensional accuracy of the sheets and reduces waste
2024-09-02 What are the advantages of the control system for melt pumps?
The control system of the melt pump plays a crucial role in the melt pump extrusion system, and its advantages are mainly reflected in the following aspects: I. Improving Output Stability and Product Quality Reducing Pressure Fluctuations: During the extrusion process, the control system can reduce pressure fluctuations caused by factors such as uneven material feeding, temperature fluctuations in the barrel and die head, and screw speed pulsations. This helps ensure dimensional accuracy of the extruded products, thereby reducing waste rates and improving product quality. Optimizing Operating
2024-08-31 Analysis of the causes of material leakage in the melt pump
The reasons for material leakage in a melt pump can be attributed to multiple factors, primarily related to the pumps structure, operating conditions, and maintenance status. Below is a detailed analysis of the causes of material leakage in a melt pump: I. Sealing Failures Aging or Damage of Sealing Components: Sealing components in a melt pump, such as shaft seals, packing, and O-rings, may lose their sealing effectiveness due to aging, wear, or corrosion after prolonged operation, leading to material leakage. Improper Installation: If sealing components are not installed according to specifi
2024-08-29 Is the application range of melt gear pump very wide?
Yes, the application range of melt gear pumps is extremely broad. As mentioned earlier, melt gear pumps, as specialized equipment for conveying high-temperature molten materials, have significant applications across multiple industries. They not only play a pivotal role in the plastic processing industry (such as extrusion molding and injection molding) but are also widely used in fields like chemical fibers, rubber, chemicals, pharmaceuticals, and more. In scenarios where high-temperature, high-pressure, and high-viscosity molten media need to be processed, the importance of melt gear pumps b
2024-08-27 Precautions for selecting cross axis universal joint for melt gear pump
When selecting and configuring the cross-shaft universal coupling for a melt gear pump, which transmits torque between the pump and the motor, it is important to pay attention to the following points given its high angle compensation capability, compact structure, smooth and noiseless operation, strong load-bearing capacity (with torque reaching over 6000KNM), suitability for high-power transmission, and notable energy-saving effect. This type of coupling is widely used in various applications. For polymer melt conveying gear pumps, the key considerations are: 1.Understanding the Load Characte
2024-08-26 How to determine the size of the melt pump? How to calculate the pump's output per minute?
The melt metering pump uses displacement to indicate its size. The models of melt metering pumps range from 0.2cc to 12000cc. This includes: 0.2cc, 0.5cc, 1cc, 2cc, 5cc, 10cc, 20cc, 31.5cc, 50cc, 100cc, 150cc, 200cc, 315cc, 500cc, 800cc, 1200cc, 3200cc, etc. For example, a 100CC displacement melt pump metering pump refers to a displacement of 100cc per revolution of the melt metering pump, which can also be understood as 100ml. The speed of the melt metering pump varies depending on the viscosity of the conveyed material. When the viscosity of the material is between 1000-5000PA S (viscosity u
2024-08-23 Explanation of the Working Principle of Spiral Seals in Melt Pumps
The working principle of the spiral seal of the melt pump mainly involves the dynamic sealing mechanism, and its core is to use the reverse thrust formed by the multi head spiral groove in the inner hole of the sealing sleeve during the operation of the gear shaft to prevent the leakage of the conveying medium to the outside of the shaft, thereby achieving the sealing effect. The following is a detailed explanation of the working principle: Detailed explanation of working principle 1. Dynamic sea
2024-08-21 Structure and Self-Lubrication Principle of Bushings for Melt Metering Gear Pumps
The structural design of bushings for melt metering gear pumps allows the melt to easily penetrate the clearance between the hole and the shaft, achieving effective self-lubrication. These bushings are characterized by the following features: within the inner bore wall of the bushing, there are melt infiltration grooves designed to direct the flow. Additionally, reflux grooves are incorporated on one side wall and the outer side wall of the bushing. The melt infiltration grooves feature a larger
2024-07-13 Precautions for using pipeline melt pump
Pipeline melt pump is a widely used conveying equipment in chemical, pharmaceutical, food and other industries, mainly used for conveying special media such as high temperature, high viscosity, flammability and explosiveness. This article will provide a detailed introduction to the precautions for using pipeline melt pumps. Precautions for using pipeline melt pump: 1.When installing a pipeline melt pump, it should be ensured that the pump body is tightly connected to the pipeline to prevent medium leakage. 2.Before starting the pipeline melt pump, check whether the motor, bearings and other co
