Key Steps in Substrate Pretreatment: The rubber roller coating process begins with meticulous preparation of the substrate. The metal roller core needs to be sandblasted to create a rough surface, enhancing adhesive adhesion. The cleanliness of the treated surface directly affects the subsequent bonding effect of the rubber compound; typically, solvent wiping and drying are used for dual protection. The temperature is controlled within the range of 60-80℃ to ensure the substrate is dry without causing heat deformation.
Rubber Compound Formulation and Molding Process: Selecting the appropriate rubber compound based on the usage environment is crucial. Common materials include natural rubber and neoprene rubber, with hardness ranging from 40-90 Shore A. The rubber compound needs to undergo mixing and filtration processes to ensure it is free of impurities. Hot pressing is used during molding, with the temperature controlled at 140-160℃ and the pressure maintained at 8-12 MPa. The time is adjusted according to the thickness of the rubber compound.
Vulcanization Treatment and Finished Product Inspection: Vulcanization is a critical stage that determines the performance of the rubber roller. A staged heating method is used; the initial low temperature allows the rubber compound to flow fully, while the later high temperature ensures cross-linking density. The finished product needs to undergo multiple inspections, including appearance inspection, hardness test, and dynamic balance test, to ensure that there are no bubbles or delamination, and that the radial runout is controlled within 0.05mm.
