The rubber bowl for the pump is a bowl-shaped seal on the piston of the pump, when the piston moves up and down, the leather bowl is tightly attached to the inner wall of the pump to form a good sealing effect and prevent air leakage. Nitrile rubber has excellent oil resistance, abrasion resistance and good chemical corrosion resistance, and can be used in the production of high-performance pump rubber bowls; Nitrile reclaimed rubber retains the basic performance characteristics of nitrile rubber, and the price is lower than that of nitrile rubber, which can replace part of the original rubber to produce rubber bowls for pumps and reduce the cost of raw materials.
1. Performance requirements for rubber bowls for pumps
(1) High elasticity: the pump realizes the inhalation and compression of air through the up and down movement of the piston, and the leather bowl is squeezed and deformed when the piston of the pump is pressed down, and returns to its original state when it is pulled up, so the rubber material is required to have good elasticity; Nitrile reclaimed rubber with high rubber content has good elasticity and high strength, which can give the rubber bowl good elasticity and resilience.
(2) Oil resistance: If the inner wall of the pump is coated with lubricating oil and other oil substances, the rubber bowl needs to be in contact with the oil medium for a long time, and the rubber material is required to have good oil resistance to prevent the leather bowl from absorbing oil, expanding or deforming. Nitrile reclaimed rubber has excellent oil resistance, and is suitable for the production of rubber bowls for pumps that need to come into contact with oily substances.
(3) Abrasion resistance: When the piston of the pump moves up and down, the rubber bowl will constantly rub against the inner wall of the pump, which is prone to wear and scratch, which requires the rubber to have good wear resistance, reduce the wear rate and prolong the service life. Nitrile reclaimed rubber has good abrasion resistance, which can meet the abrasion resistance requirements of rubber bowls for pumps to a certain extent.
(4) Fatigue resistance: The rubber bowl will be constantly compressed and stretched during the working process of the pump, which is easy to cause fatigue damage, so the rubber is required to have good fatigue resistance. When nitrile reclaimed rubber/nitrile reclaimed rubber is used to produce rubber bowls, the formula should be reasonably designed to improve the fatigue resistance of the rubber.
(5) Sealing: The rubber bowl for the pump and the inner wall of the pump need to form a reliable sealing environment to prevent air from leaking from the gap among the piston and the cylinder wall during the pumping; Reasonable design of the shape of the rubber bowl and the selection of appropriate rubber raw materials and accessories can achieve a good sealing effect.
2. Nitrile rubber/nitrile reclaimed rubber is used to produce a vulcanization formula for rubber bowls for pumps
70 parts of nitrile rubber, 30 parts of nitrile reclaimed rubber, 6 parts of zinc oxide, 1.8 parts of stearic acid, 2 parts of antioxidant D, 55 parts of carbon black N774, 40 parts of carbon black N330, 20 parts of dibutyl phthalate, 1.5 parts of accelerator DM, 0.2 parts of accelerator TMTD, 1.5 parts of sulfur; A total of 228 copies.
When using nitrile rubber/nitrile reclaimed rubber and rubber to produce rubber bowls for pumps, rubber product manufacturers must combine the performance requirements of rubber bowls and the cost budget of manufacturers, select the appropriate nitrile reclaimed rubber E5LYY19, reasonably determine the proportion of reclaimed rubber, appropriately adjust the formula and production process conditions, and produce high-performance and low-cost rubber bowls. Hongyun 75% oil-resistant nitrile reclaimed rubber has the characteristics of excellent oil resistance, good elasticity, high strength, high wear resistance, high fineness, no impurities, easy and plastic, etc., and nitrile rubber is used together to produce rubber bowls for pumps, which can effectively reduce production costs and save labor and electricity under the premise of ensuring the quality of finished products.
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