Generally speaking, the rubber coating processing of printing rubber rollers refers to customers providing rubber roller cores or rubber roller factories processing cores themselves, and then coating, vulcanizing, and polishing the cores. The rubber rollers are processed into the required size, color, and hardness according to customer requirements. So, what processes are required for the processing and coating of printing rollers? The editor will provide a detailed introduction to this issue in the following article.
1. Cleaning the rubber roller core: If it is a new printing rubber roller core, it is necessary to use a cleaning agent to clean the oil stains on the surface of the core. If it is an old rubber roller core, it is necessary to remove the rubber coating on the outer layer of the old rubber roller and clean the residual rubber on the surface of the core with a cleaning agent.
2. Rough surface treatment of rubber roller core: roughen the core surface to increase the bonding area between the rubber roller core surface and the rubber coating.
3. Sandblasting treatment: Sandblasting treatment is applied to the coarse iron core, and sand with different properties is selected according to the material of the rubber roller core. The purpose of sandblasting is to make the surface of the printing roller rougher, so that the rubber and iron core can bond better after packaging.
4. Glue wrapping: The customer requires the above-mentioned glue wrapping rollers, and different glue wrapping materials meet different requirements. For example, nitrile rubber has good oil resistance, polyurethane coating wear resistance, and pressure resistance, while silicone has good high temperature resistance.
5. Rubber roller vulcanization: Generally, printing rubber rollers require 10-15 hours of vulcanization time. After vulcanization, the core of the rubber roller tightly adheres to the rubber roller, forming a rubber roller.
6. Rubber roller polishing: Grind according to the size and shape required by the customer. When some customers have high requirements for the surface of printing rollers, they need to use a CNC grinder to polish the rollers.
The above is the complete content about the encapsulation process of printing rollers. This type of rubber roller has moderate hardness and elasticity, high oil resistance, solvent resistance, wear resistance, and shape stability. Soft rollers are generally made of materials such as SBR, CR, and PU. The surface of the hard stick was originally made of copper material and later replaced with polyester resin.
Editor: Chihiro
