The Basic Properties Of The Rubber Roller Depend On The Physical And Mechanical Properties Of The External Rubber

The basic properties of Dongguan rubber rollers depend on the physical and mechanical properties of the external rubber, which can be introduced as follows:
(1) Tear strength: Strength refers to the material's ability to resist damage under external force. Strength refers to the ratio of the relay force that occurs when a rubber test piece is stretched to breakage and the cross-sectional area of the initial test piece. The unit is MPa ( kg / Cm2). For Dongguan printing rollers, this is an important mechanical property. Rubber rollers must follow a variety of external forces during the rice milling process and perform high-speed and violent mechanical movements. Therefore, the rubber must have high strength, otherwise Will reduce the use value of the rubber roller.

(2) Elasticity: It is one of the most important properties of rubber materials. It refers to the performance of rubber that deforms under the action of external force and returns to its original state after the external force is removed. There are many indicators for measuring elasticity, such as: constant stress elongation, elongation, breaking permanent deformation and heat generation, etc. For Kariya rubber rollers, moderate elasticity is required. Although high elasticity can improve the peeling ability, reduce the risk of bursting, and less broken rice, etc., but the elasticity is too high, it is easy to produce large elastic deformation, increase the heat generation, increase the working temperature of Changshu rubber rollers, and reduce other mechanical and physical properties of rubber. performance. Such as: hardness will be reduced, can not be used. The elasticity is too low, the hardness is too high, the wear resistance is poor, and it is easy to cause injuries.

(3) Hardness: Hardness refers to the ability of rubber to resist deformation when compressed by external forces. Generally, a Shore A hardness tester is used to measure its value. Generally speaking, the requirements for the hardness of rubber rollers are relatively strict. Too high will increase the rubber consumption of the rubber roller and too much broken rice will reduce the shelling rate. Generally, the hardness of the solid silicone roller has three tolerance ranges of 85o, 90o, and 95o, all within ± 3 degrees. It should also be noted that the above hardness is not a fixed value. Depending on the production season, its value is at the standard temperature (23 ℃ ± 2o). It is measured under the standard sample, and the hardness value of the rubber roller in actual work is different from the rated value of the rubber roller, and it will generally decrease.

(4) Anti-aging performance: The so-called aging means that during the long-term storage and use of rubber, due to the physical and chemical effects of fatigue such as oxygen, odor, heat, and light rays in the air, the quality of rubber is deteriorated. It is important The physical and mechanical properties of the rubber are degraded and scrapped. After aging, the rubber rollers in Dongguan show signs of hardening, brittleness, cracking, and mold growth. The elastic strength and other properties of the rubber material are greatly reduced, which seriously affects the use effect, even when the rubber roller is in production. Many anti-aging measures have been taken, but it is still very important to do a good job in anti-aging work.

(5) Balance: Balance refers to the ability of the rubber roller to maintain a fixed axis of rotation during rotation. Strictly speaking, it is a kind of dynamic balance. However, since Dongguan Zhuoshi rubber roller is not a precision mechanical part, and dynamic balance is not easy to measure, Therefore, the concept of static balance is actually adopted, that is, the symmetry of the mass of each part in the warp direction with respect to the working axis, commonly known as "heavy weight". The balance of Dongguan rubber rollers is good or bad for the shelling rate, brown rice rate, rubber consumption, and grain hulling machine. Have a significant impact on the normal operation of the machine.