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2021-03

How to deal with bubbles after vulcanization of rubber

How to deal with bubbles after vulcanization of rubber There are always some bubbles on the surface of rubber samples after vulcanization with different sizes.After cutting, there were also a few bubbles in the middle of the sample. Analysis of the causes of bubbles on the surface of rubber products 1.Rubber mixing is not uniform,workers do not operate properly 2.Rubber film parking is not standard, the environment is not sanitary, management is not standard 3.The material is too moist (add calcium oxide when mixing) 4.Insufficient vulcanization, underripe looks bubbly 5.Insufficient vulcanization pressure 6.Vulcanizing agent more impurities, small molecules of impurities decomposed in advance, bubble residual products 7.The exhaust design of the mold itself is unreasonable 8.The product is too thick, the rubber heat transfer is slow, after the appearance of vulcanization, the rubber liquidity decreases, resulting in the lack of material, so it may produce bubbles Solution:To be improved in curing pressure and time 1.Prolong curing time or increase curing speed 2.Increase the number of exhaust during vulcanization

2021-03-30

How to deal with bubbles after vulcanization of rubber

30

2021-03

How to choose different types of oil seals?

How to choose different types of oil seals? The choice of oil seal should be based on the use of medium and working environment， the sealing medium determines the material of the oil seal,the working environment mainly considers the operating pressure and the working line speed and the working temperature range.Therefore,

2021-03-30

How to choose different types of oil seals?

30

2021-03

Common burr treatment method

Common burr treatment method for silicone rubber products 1.Deburring by hand Manual trimming is a traditional trimming method，It debur by punch die cutting and scissors and a scraper.Manual operation may lead to differences in product quality and speed, so it is necessary to make clear the product parts and technical requirements before deburring, they should master the correct deburring methods and konw how to use the tools correctly.

2021-03-30

Common burr treatment method

30

2021-03

Advantages of silicone rubber

Advantages of silicone rubber： Silicone rubber is a mixture of special silicone rubber and high purity silicon powder, so it has the properties of inorganic and organic materials. Compared with other organic rubber, solid silicone rubber has many advantages:

2021-03-30

Advantages of silicone rubber

30

2021-03

General material of O-rings

General material of O-rings Nitrile butadiene rubber, carboxylic nitrile, fluorine rubber, ethylene-propylene rubber, hydrogenated nitrile butadiene rubber, silicone rubber, neoprene rubber, fluorosilicone rubber, polyurethane, chlorol rubber, styrene butadiene rubber, butyl rubber, natural rubber, ethylene/ethylpropionate rubber, polyacrylate rubber, perfluorine rubber and so on ?

2021-03-30

General material of O-rings

30

2021-03

O-ring's hardness measurement method

O-ring's hardness measurement method is as follows: Measuring instrument Measurement by micro hardness tester to complete, hardness tester should conform to GB/T6032-1985 "vulcanized rubber hardness determination (30-85IRHI) micro test method" test specimen 1.The inner diameter of the standard sample is 14mm±0.17mm.The cross section diameter is 2.65mm±0.09mm, need 3 pieces? 2.For O-rings with a cross section diameter of more than 6mm or an inner diameter of more than 30mm, their segments can be cut and measured, and the results cannot be compared with the standard test results 3.Test procedures Follow the test procedure of GB/T 6032 4.Test result representation:The measured results are 3. Take the middle digit and the whole digit ?

2021-03-30

O-ring's hardness measurement method
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