Tire reclaimed rubber is made from waste tires as raw material, is inexpensive, has good wear resistance, and is compatible with natural rubber and general-purpose synthetic rubber; The corn husking machine rubber roller is an important component of the corn husker machine, generally made mainly from natural rubber. Can tire reclaimed rubber be added? How much should be added? What issues should be noted when using tire recycled rubber in stripping machine rubber rollers to reduce costs?
1. Can the corn husking machine rubber roller be mixed with tire reclaimed rubber to reduce costs?
(1) Performance matching analysis of tire reclaimed rubber and corn husking machine rubber rollers
During operation, the corn husker rubber roller requires low-speed, continuous friction to press corn stalks and husks. The compound must have good wear resistance, elasticity, tear resistance, and aging resistance, and is generally processed from natural rubber, styrene-butadiene rubber, cis-butadiene rubber, and other raw materials. Tire reclaimed rubber retains the wear-resistant, abrasion-resistant, and anti-aging characteristics of original tire rubber, meeting the basic performance requirements of stripping machine rubber rollers.
Natural rubber has limited resistance to mechanical fatigue, and stripping rollers produced from pure natural rubber are prone to surface wear and elastic degradation during long-term continuous operation; After appropriately adding tire reclaimed rubber, the compound's aging resistance, wear resistance, and resistance to repeated friction fatigue are significantly improved.
(2) Cost analysis of tire reclaimed rubber mixed into corn husking machine rubber rollers
The market price of tire reclaimed rubber made from waste tires is only 30%-50% of that of natural rubber, and its use in corn husking machine roller production can effectively reduce raw material costs. Compared with natural rubber and synthetic rubber, reclaimed rubber has better plasticity and flowability. Unvulcanized rubber mixed with reclaimed rubber exhibits less expansion and shrinkage during processing, and less vulcanization and reversion. Therefore, adding tire reclaimed rubber can also improve the processing performance of corn husker rubber rollers and reduce production energy consumption.
(3) Compatibility analysis of tire reclaimed rubber with natural rubber and styrene-butadiene rubber
Tire reclaimed rubber has excellent compatibility with general rubbers such as natural rubber and styrene-butadiene rubber. After mixing, the compound system is uniform and stable, with no delamination, delamination, or performance gaps. The finished rubber roller molding quality is stable.
2. The proportion of tire reclaimed rubber mixed into the corn husker roller
When adding tire reclaimed rubber to corn husking machine rubber rollers to reduce costs, the proportion of recycled rubber directly determines the mechanical properties, service life, and production cost of the finished rubber roller. The dosing ratio should be determined based on the roller's usage scenario and performance requirements.
Ordinary civilian small corn huskers have low operating loads, short daily working hours, and limited usage frequency. They have moderate requirements for core performance such as tensile strength and elasticity, E5LYY129 tire reclaimed rubber content is 30%-70%. Large agricultural mechanized corn huskers are equipped with rubber rollers. The equipment operates continuously for long periods and bears heavy workloads. The rubber rollers are in a state of high-intensity friction and compression for extended periods, requiring high tensile strength, fatigue resistance, and resilience. The proportion of tire reclaimed rubber should be controlled among 15%-30%.
3. Key points for formula design of the rubber roller for tire reclaimed rubber production corn huskers
When producing corn husker rubber rollers using natural rubber and tire reclaimed rubber together, since the tire reclaimed rubber already contains vulcanizing agents, accelerators, carbon black, and antioxidants from the original tire formula, the formulation needs to be appropriately adjusted.
(1) Corn husking machine roller vulcanization system with tire reclaimed rubber: It is recommended to use the traditional sulfur-accelerator system, combined with accelerators CZ, DM, etc.; Since corn husking machine rubber rollers are thick-walled rubber products with slow internal heat conduction during vulcanization, promoters with good vulcanization flatness should be selected to prevent excessive sulfur on the surface while lacking internal sulfur in tire reclaimed rubber corn husking machines.
(2) Corn husking machine roller reinforcement filling system mixed with tire reclaimed rubber: The reinforcement filling system determines the wear resistance and strength of the husker rubber roller. Generally, a combination of high-wear and semi-reinforced carbon black is used, giving natural rubber/tire reclaimed rubber good tensile strength and wear resistance, improving the process performance and elasticity of the compound; Fill with an appropriate amount of light calcium carbonate.
When adding tire reclaimed rubber to the corn husking machine roller to reduce costs, it is also necessary to appropriately adjust the mixing and vulcanization processes. For example, during mixing, first uniformly plasticize natural rubber and styrene-butadiene rubber, then add tire reclaimed rubber for mixing, ensuring uniform dispersion of the compound; The vulcanization temperature and time should be determined according to the formula's measured Mooney charring time and vulcanization curve; The hardness of rubber rollers is controlled within the range of Shore A60-75 degrees; if hardness is too low, the stripping rate decreases; if too high, the breakage rate increases. Later, we will share with you the formula for producing tire reclaimed rubber and producing low-cost, high-performance corn husking machines.
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