Ms. Wang

The molding process of rubber
The rubber roller is similar to other solid rubber products in the preparation of mixed rubber. That is, first of all, a high-power open mill is needed to mold some raw rubber to give the raw rubber plasticity for future use. molding processing. Then put the raw rubber or plasticized rubber and various compounding agents into the internal mixer for uniform mixing. Because the surface requirements of the rubber roller are very high, no impurities can be mixed into the rubber material, otherwise it will seriously affect its performance. Therefore, the rubber material is mixed It must be filtered after refining. Then there is sheeting and calendering, that is, pressing out a thin and uniform film to prepare for the next molding process. The forming process is an important step in the production of rubber rollers, and its methods are also various. The last process is to wrap the formed rubber roller with cloth and tie it tightly, and then send it to the vulcanization tank for vulcanization. After vulcanization, it also needs to be ground to ensure the surface finish and dimensional accuracy of the rubber roller.
The molding methods of rubber-coated rollers mainly include lamination method, continuous extrusion and winding molding method
Lamination molding method
Place the film roll pressed out by the calender on the rubber roller lamination molding machine , guide the film, wrap the entire film layer by layer and attach it to the metal roller core until the required thickness of glue is reached. The film used for lamination should not be too thick, generally left and right, and there should be a margin for the thickness of the rubber layer of the rubber roller to facilitate the subsequent turning and grinding process. It is recommended that more layers of film should be applied to the wider ends of the rubber roller to make the adhesive layer at both ends higher to avoid thinning the adhesive layer when wrapping the canvas. The key technology of the rolling lamination molding method is to avoid rolling and laminating. Clamp air between layers of glue. In addition, due to the limitation of the film width, this method cannot be used to form long rubber rollers.
Continuous extrusion winding molding method
This method uses an extruder to continuously extrude hot glue strips, and directly spirally wraps and rolls the hot glue strips on the metal roller core. This method has high production efficiency and eliminates the need for a series of auxiliary operations such as solvent cleaning and seam treatment for calendered film unfolding, padding and cutting. It also overcomes the problem that the lamination molding method cannot mold rubber materials with high Mooney viscosity and poor adhesion. shortcoming.