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2021-03

Common Standard Of O-ring

Common Standard Of O-ring ISO 3601-5-2002  Fluid power systems—O-rings Part1:Inside diameters,cross-sections, tolerances and size idenitification code ISO 3601-5-2002  Fluid power systems—O-rings Part5:Suitability of elastomeric materials for industrial applications GB3452.1-92  Fluid systems—Sealing devices—O-rings—Inside diamaters, cross-sections,tolerances and size identification code GB3452.2-87  Appearance quality acceptance criteria for rubber O-rings GB3452.3-2005  Housing dimensions for O-ring elastomer seals in  hydraulic and pneumatic applications HG/T2579-2008  Rubber Compounds of O-Ring used for Hydraulic fluid power System GB/T 5720-2008  Test methods for rubber O-rings JB/T 6658-2007  Housing dimensions and tolerances of O-ring rubber  seal applicable to pneumatic JB/ZQ 4224-97 Size for O-rings HG/T 2021-2014  O-rings resistant to high temperature and oil HG/T 2333-1992  Rubber Compounds of O-Ring used for vacuum HG/T 3089-2001  Rubber Compounds of O-Ring used for fuel JISB2401-2005  O-rings for Japanese standard

2021-03-30

Common Standard Of O-ring

30

2021-03

Advantages of Nitrogen Freezing to Remove Burrs

Advantages of nitrogen freezing to remove burrs 1. The operation is simple, ordinary workers can operate the machine skillfully after a period of training, and the advanced automatic control system can prevent workers from misoperation 2.High production efficiency, a frozen deburring machine average daily processing amount equivalent to 50-80 skilled workers trim the work load 3.High trimming precision, it can remove very small and hidden flash, without limited by product shape, high pass rate and stable trimming quality 4.Do not damage the surface of products, improve the appearance of products quality, increase the service life of products 5.Small area, a frozen trimming machine and auxiliary equipment only 10 square meters 6.Reduce the use cost of the mold and the cost of the glue material. The equipment does not need the edge tearing, only the flying edge is required to be as thin as 0.2mm, the overflow groove is as small as possible, and the flying edge allowance is only 1/5-1/10 of the ripping mold.

2021-03-30

Advantages of Nitrogen Freezing to Remove Burrs

30

2021-03

Why the rubber sealing strip products will appear bubbles？

Why the rubber sealing strip products  will appear bubbles？ Automobile sealing strip is one of the important parts of the car, widely used in the door, window, body, seat.Car sealing strip, chair, skylight, engine case and trunk and other parts, with waterproof, sealing, sound insulation,dustproof, frost proof, shock absorption, heat preservation and energy saving important role, car sealing strip can improve air tightness, prevent wind and rain into the compartment； Once the aging of the car seal strip is damaged, it will cause the car leakage, and the wind noise of the car will increase, and the rain leakage will easily make the body rust.Then the car door seal and other rubber seal products in the production process of some problems may lead to the door seal and other rubber seal surface bubble phenomenon, what is the specific reason? Analysis of causes: 1.The auxiliaries in the compound are not evenly dispersed during mixing 2.Vulcanizing agent impurities more, small molecule impurities into early decomposition, bubble residual products 3.Mixing temperature is low, there is moisture, moisture volatilization is not net, when the temperature is high, the rubber is easy to melt when the sulfur is added to the opening mixer, or the sulfur is burnt 4.The glue material is not placed enough time or not placed on the production and use 5.Rubber heating is not uniform so the surface is rough 6.When the rubber material is hot smelted on the opening mill, the surface is wrapped with air, and the type of rubber material has the phenomenon of hiding air 7.Temperature control is not strict and there are air bubbles on the surface of semi-finished parts How to resolve ? 1.Optimize the production formula, choose easy dispersing type of additives to replace the existing additives, increase the application of dispersant, homogenizing agent and other processing additives, improve the dispersion performance of various additives 2.Mixing rubber using internal mixer two-stage process production, a period of mixing temperature increase, so that the moisture in the raw material is fully volatilize, glue after placing and then two-stage mixing, temperature control in the temperature range of sulfur and accelerator, avoid burning time short or burning 3.Strictly control the placement time of semi-finished products, so that all kinds of additives fully diffuse, improve the uniformity of the rubber material, and is conducive to the recovery of stress and strain under mechanical action 4.The glue hot smelting should be uniform, and the operation mode of separating the glue supply from the type in the hot smelting is adopted to improve the smoothness of the surface of the glue 5.Adopt the extrusion process to extrude the rubber materialand the surface of the type of adhesive material is no longer trapped air phenomenon.

2021-03-30

Why the rubber sealing strip products will appear bubbles？

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

Storage Note for O-rings

Storage Note for O-rings O-rings are highly susceptible to various external environmental conditions, We need to know the storage conditions of O-rings in detail, so as to extend the storage time of O-rings. The storage life of seals is determined by the type of rubber material and storage conditions O-rings are susceptible to a variety of external environmental factors，such as, effects of distortion, oxygen, ozone, light, heat, moisture, oil, or chemical solvents,about how to reserve the O-ring, we need  follow the following rules: 1.Humidity: The relative humidity of the warehouse should be less than 70%, avoid too wet or too dry, avoid condensation phenomenon 2.Temperature: 5-25℃ is the ideal storage temperature.Avoid contact with heat and sunlight 3.Illumination: Avoid direct sunlight or strong artificial light sources with ultraviolet rays. Ultraviolet rays in sunlight and moisture in humid environment can easily lead to aging of rubber sealing materials and changes in material size.UV-proof packaging provides the best protection.Warehouse Windows can be coated with red or orange paint or film 4. Radiation: Avoid ionizing radiation damage to seals 5.Oxygen and ozone: Rubber materials should be protected from exposure to circulating air.Ozone is harmful to most elastomers. The following equipment should be avoided in the warehouse: high-voltage electrical equipment, electric motors and other equipment. 6.Be out of shape: Rubber parts should be placed in a free state as far as possible to avoid stretching, compression or other deformation 7.Contact with liquid or semisolid materials: Do not contact solvents, oils, fats or other semi-solid materials 8.Contact with metallic or nonmetallic materials: Do not touch magnetic materials, cast iron, copper and its alloys, or materials containing materials that can damage rubber.Do not use PVC material to pack seals. Different seal materials should not be mixed. 9.Clean: Clean the seals with soap and water as needed.But water should not contact fiber reinforced seals, rubber metal bonding seals, AU material seals.Disinfectants, organic solvents and tools with sharp edges should not be used.After cleaning the seal should be dry at room temperature, not close to the heat source 10.Packaging: Open the package only when necessary, otherwise it may attach foreign matter or dust, or cause damage. When keeping the unsealed product, please take care not to allow dust to adhere to or mix with it, or cause damage. Repacking the product as original as possible  

2021-03-30

Storage Note for O-rings
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