Does the inside of the rubber screw barrel need to be heated or cooled?

Necessity of Heating
1. Achieve Rubber Plasticization
By heating the barrel wall, the rubber rapidly softens and melts under the screw's action, forming a uniform plasticized rubber compound.
2. Ensure Temperature Uniformity
Precisely calculate the gap between the screw and the barrel to ensure even heat distribution within the barrel, avoiding localized overheating or cold spots and improving plasticization efficiency.
3. Improve Production Efficiency
Appropriate heating temperature can reduce material viscosity and screw resistance, thereby reducing energy consumption and increasing production capacity.
Necessity of Cooling
1. Prevent Material Degradation Due to Overheating
Efficient cooling water channel design can quickly remove excess heat generated during processing, preventing thermal aging or degradation of the rubber due to excessive temperatures.
2. Maintain Barrel Life
Using high-hardness alloy steel or wear-resistant alloy materials, and rigorously heat-treating them after precision forging/casting, combined with a cooling system, can significantly improve surface hardness and wear resistance, thereby extending service life.

3. Improved Product Quality and Economic Efficiency
Stable internal temperature helps reduce material residue and scrap, further improving product consistency and production cost-effectiveness.
Technical Implementation Key Points
1. Efficient Cooling Water Channels
Zhoushan Microwave Screw Machinery Co., LTD utilizes multiple water channels within the screw barrel to achieve rapid and uniform heat exchange.
2. High-Quality Materials and Heat Treatment
High-strength alloy steel or wear-resistant alloys are selected, precision forged or cast, and then rigorously heat-treated to enhance surface hardness and wear resistance.
3. Precise Gap Design
Precisely calculated clearance between the screw and barrel ensures uniform heating of the rubber within the barrel, promoting efficient plasticization.
4. Overall System Integration
Combining microwave heating technology with traditional hot oil/electric heating methods, this achieves rapid heating and precise temperature control to meet the processing requirements of diverse rubber formulations.