Technical information

• 

• Polyurethane cots for automobile plate - enterprise standard of Hebei Yahua rubber roller group Co., Ltd 报错 笔记双语对照

  2020-02-19

  1. ScopeThis standard specifies the requirements, test methods, manufacturing methods, sequence transformation methods, inspection rules and characteristics, packaging, transportation and storage of rubber rollers for tenon automobile plate (hereinafter referred to as special rubber roller for automobile plate).This standard is applicable to the manufacture of automobile plate.2. Normative referencesGB / T528 determination of tensile stress-strain properties of vulcanized or thermoplastic rubberGB / t529 rubber pocket hardness tester indentation hardness test methodGB / T531 determination of tear strength of vulcanized or thermoplastic rubberGB / t1689 determination of abrasion resistance of vulcanized rubberGB / t1690 test method for liquid resistance to vulcanizationGB / t3512 vulcanized or thermoplastic rubber accelerated aging and heat resistance testGB / t7759 rubber, vulcanized or thermoplastic - Determination of compression set at room, high and low temperaturesGB / t2198 General requirements for physical test methods of vulcanized rubberGB / t3077 hardness requirements for rubber and plastic rollers

  More >>

• 

• Knowledge on rubber roller bearing lubrication

  2020-02-19

  For many years, Yahua Group has insisted on strong quality, building an image, developing enterprises with science and technology, paying close attention to product quality, integrity first, winning the market and achieving leapfrog development. The group company has developed and launched high-quality "Yahua" brand rubber rollers (three series, more than three hundred varieties) to the market. The group company leaders have been insisting on "science and technology for enterprise development, technological innovation, standard process, casting "Quality" quality policy has steadily improved the quality of "Yahua" brand rubber rollers and won the market. The high-tech composite paper-making rubber rollers developed and developed in China are the first in China to replace imports, filling the technical gap in the domestic rubber roller industry Market prospects.​Lubrication of rubber roller bearing​In order to ensure the flexible operation of the rubber roller, reduce the wear of the bearing steel ball and the track groove, and prolong the service life, the grease used in the bearing must be used for a long time, bear the strength of the oil film, and have a wide application range. No. 3 extreme pressure lithium base grease. During the operation, the amount of oil injection should not be too large. Make sure there is grease at the second gear ball. Too much oil will cause loss, resulting in contaminated oil yarn defects. If it penetrates into the rubber, it will cause the rubber surface to swell, swell, blister Especially if the surface is not treated with rubber hoses, excessive oiling will cause bearing wear. Use special tools to ration oil. Scientifically manage this knowledge and lubricate the bearings to protect the rubber rollers.

  More >>

• 

• Observe the aging phenomenon of rubber roller

  2020-02-19

  ​Hebei Yahua Rubber Roller Group Co., Ltd., for many years, has insisted on strong quality, establishes an image, promotes enterprise with science and technology, pays close attention to product quality, integrity first, wins the market, and has achieved leapfrog development. We use high-quality technology and imported raw materials, and through cooperation with domestic materials research institutes, we continuously optimize the process to ensure product quality. Adhering to the quality policy of "technological development, technological innovation, standardization of technology, casting quality products", the quality of "Yahua" brand rubber rollers has been steadily improved and won the market. "Yahua" products have a high reputation in the market, with a market share of more than 26%, and the main economic and technical indicators rank in the forefront of the industry. Under the action of alternating stress or strain, the rubber rubber roller gradually deteriorates its physical and mechanical properties, and finally loses its use value is called the fatigue aging of the rubber roller. Eventually lead to ozone aging. Let's take a look at what are the signs of aging.The aging phenomenon of rubber roller has the following performance:（1）Ozone cracking occurs on the surface of the stretched rubber roller during ozone aging. There is a critical stress in the rubber roller's ozone cracking. When the rubber elongation or stress is below the critical value, it occurs. Ozone will not crack when aging.（2）The ozone aging of the rubber roller is a surface reaction, and the unstressed rubber surface reaction depth is 10-40 molecules thick.（3）When the rubber rubber roller generates ozone cracks, the direction of the crack is perpendicular to the direction of the force. This is the difference between ozone cracking and photo-oxygen aging cracking.

  More >>