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What is the silicone high temperature resistant sealing ring and application characteristics?

Release time:

2019-07-05 12:30

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What is the silicone high temperature resistant sealing ring and application characteristics?
 
What isSilicone high temperature resistant sealing ring(Silicone gas) refers to a variety of high temperature resistant rubber molecular structure formed based on silicon element, as the sealing effect of the seal.
Silicone sealing ring is very popular with people. The daily necessities such as fresh-keeping boxes, electric rice cookers, water dispensers, lunch boxes, heat preservation boxes, heat preservation boxes, water cups, ovens, kettles, etc. seen in life are all made of silicone rubber sealing ring as waterproof sealing and insurance effect.
 
The structure of different side chain elements will also lead to changes in the characteristics of silicone sealing rings (different characteristics), and Dongsheng tells you that methyl vinyl silicone rubber (VMQ) is a kind of silicone rubber material that is widely used.
 
Silicone high temperature resistant sealing ring, listen to the name to know is a very good heat resistance and environmental protection of the seal.
Its sealing ring specification structure does have very excellent heat resistance, oxidation resistance, ozone, low temperature elasticity and good electrical insulation performance characteristics, is a kind of gas has a high permeability performance of the seal.
 
Silicone sealing ring surface energy is low, with moisture absorption, can play a role in isolation. Water resistance, but water vapor resistance is not good, pressure above 50psi is not recommended. Compatible with most oils, chemicals and solvents.
 
Generally, silicone rubber has good acid and alkali resistance, can resist polar solvents, and is not resistant to alkane hydrogen and aromatic oils. Not recommended for use in most concentrated solvents, oils, concentrated acids and diluted caustic solutions.
 
Special silicone sealing ring also has radiation resistance, flame resistance, oil resistance and other properties. It has low tensile strength and weak wear resistance, and is generally not used for dynamic sealing.
The working temperature range of the sealing ring is generally -60 ℃ ~ 225 ℃, the high temperature of the special silicone rubber can reach 300 ℃, and the low temperature can reach -100 ℃. (TR10 can be at -100°C), while the hardness range Shore is generally between A25 ° and 90 °.
What is the difference between silicone seals and rubber seals?
 
In the sealing equipment, there are two corresponding spearheads. They are "seal" and "leakage". From a long time ago, "seal" and "leakage" have often dried up. Dongsheng seal company, like many sealing industries, has continuously conducted research, development and improvement on them. How can we make "seal" complete victory and reduce or disappear "leakage.
 
Silicone seals, the manufacturing cost is relatively high, but the oil-proof effect is very good, the service life is relatively long, and it is in line with the national food products. · Rubber seals, the manufacturing cost is relatively low, but the oil-proof effect is not very good, and the service life is relatively short. The relationship between the hardness of the rubber seal material and the working pressure?
 
In the assembly of rubber seals, silicone seals and polyurethane rubber are mainly used for materials with special characteristics, such as high temperature, oily, corrosive and other materials. In the standard material of rubber seal, hardness and compression set are the main performance. The rubber material with small compression deformation is beneficial to the sealing performance of the seal, and the hardness is very important for the pressure resistance and anti-extrusion of the O-shaped rubber seal. According to domestic standards and practical experience, the compression permanent deformation of rubber at the specified temperature is not more than 50%. The hardness of the rubber is closely related to the working pressure of the seal, and the higher the pressure, the higher the hardness.

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More information

What is the difference between silicone plug and rubber plug

Silicone plug and rubber plug which one effect is good? Then today we will popularize their difference to where the end point is. First of all, rubber plug products, as a common type of industrial products and accessories, or have strong advantages, such as dust and water resistance, wear resistance, tear resistance, aging resistance, oil seal resistance and ozone radiation resistance, etc., while rubber materials are divided into various types, and the side materials over there can be made of dozens of compound materials, so different attribute functions can be deployed for different needs, as for some industries such as mechanical tight closure, electronic tight closure, vehicle construction and even aerospace and military industry, rubber blocking is the most suitable. Silicone rubber plug and rubber plug have one thing in common. They can be molded in the molding vulcanizer of silicone product manufacturers. The difference is that they are more environmentally friendly, have good high and low temperature resistance, feel better when touching by color hands, and can be in contact with human body skin for a long time. Therefore, silicone plugs for earphones and medical grade silicone plugs are widely used even in food silicone appliances, mainly or because of the material in particular the nature of the achievements of its scope of application. Silicone plug is different. Its material is mainly based on environmental protection advantages, material texture and comfortable application. Therefore, it is used in some electronic products, survival products and small-scale waterproof and dustproof household appliances. Its raw materials are mixed by precipitation method silica gel, high-fine molecular silicone gum and white carbon black. The molecular chain of the product is called heart, soft and comfortable to use! Compared with the materials of silica gel and rubber, they can be compared as follows: new technologies are used in traditional industries. Rubber materials have been heard for a long time in early years, so the comparison of rubber materials accounts for the majority. Up to now, more and more silicone rubber products have been reused because they can replace larger usage compared with rubber, namely environmental protection performance and various technologies, such as shape, pattern and color, etc. www.mingzhen2006.com

What are the fields of application of silicone keys for equipment

Characteristics and uses of silica gel Silicone is a kind of rubber. The vulcanized silicone rubber has heat resistance, cold resistance, ozone resistance, atmospheric aging resistance and good electrical insulation properties. The disadvantage of silicone rubber is that the tensile strength and elongation at break are small, and the compression deformation is large. Suitable for making parts used in high temperature, low temperature, sunlight, atmosphere, ozone environment and electrical insulation parts. Dimensional accuracy and recommend marking tolerance Trajectory material is an elastomer, compared to the plastic material, the direct impact of the shrinkage rate of many and complex factors, precision than plastic parts more difficult to do accurate, in the specific design should be fully considered, there should be no high precision. If the basic size is too large to meet the dimensional accuracy required by the design, it can be solved by the method of deformation of the positioning column with the substrate. Where dimensional accuracy is required, there must be room for convenient mold repair in the design. Etched text and patterns Silicone substrate can be designed out of the trademark pattern and text, in the molding products at the same time molding out. The group and text on the products are convex and concave two types, considering the convenience of mold processing, are generally designed as convex. In order to facilitate the replacement of marks or models, the marked parts can be designed as inserts during mold design. When the product model changes, only the marked parts in the mold cavity can be replaced to meet the needs of mark replacement. As part of this type of article, it should be designed to allow the presence of flash debris at the contour of the insert tile at the marked location. For conductive rubber, the stroke is generally 0.8~1.5mm; the exhaust groove (I. e. gas pit) is designed to prevent adsorption between the PCB and the key action. For tact switches, the stroke depends on the stroke of the switch itself (and the stroke for preventing misoperation), as described later. If the substrate is not bonded to the PCB board, the structural element of the air slot can be omitted. The key design has a hand feeling problem. Different graphs correspond to different hand feelings. According to experience, when (FP-FC)/FP is 40%-60%, the hand feeling is better. Key Typical Structure and Application According to the specific occasions where the keys are used, as well as the specific requirements of the product for the service life, pressing force, and hand feeling of the keys, the structure and application of the keys are shown in the following figure. The life of the silicone key is directly related to the material and the inclined wall structure, and is determined according to the design requirements. Part of the product silicone key life reference: Remote controller: 500000 times; Telephone type: 1 million times; Laptop computers: 4 million to 5 million times; Computer keyboard: 500~10 million; The life of silicone keys for monitoring products is defined as more than 500000 times; The ordinary life of B super silicone keys is defined as more than 1 million times,

The convenience of the use of industrial silicone buttons

In order to solve the above problems and technical defects, after continuous updating and design, a multi-station silicone button trimming machine was invented, and a utility model patent was applied. The utility model relates to a multi-position silicone button trimming machine, which comprises a base, a gantry frame and four cutting cylinders, and the four cutting cylinders are arranged vertically on the top of the gantry frame in a horizontal straight line. The beneficial effect achieved by the utility model is that the structure design is reasonable. By adopting the combination design of four reinforcement tables and four cutting blades on the gantry, the device can simultaneously trim four silicone button products. Thereby greatly improving the efficiency of trimming processing of silicone products. With the continuous expansion of the silicone button market, how to improve the processing efficiency of the silicone button has made producers pay more and more attention. The trimming of the silicone button is an important step in the production process of the silicone button, and the trimming of the traditional silicone button The processing efficiency cannot be improved, which affects the overall production efficiency of the silicone button. Various types of silica gel have different microporous structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace other similar materials: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel according to its pore size is divided into: macroporous silica gel, coarse pore silica gel, type B silica gel, fine pore silica gel. www.mingzhen2006.com

What are the molding techniques of rubber products?

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How to print the pattern on the transparent key

Some laser marking machines have played opaque keys. While using laser typing to knock out the paint, they will also burn the plastic parts that can transmit light, but cannot transmit light! Changzhou laser marking machine has a special device, which can adjust the machine to the function of laser processing light-transmitting key. The laser can clean the paint sprayed on the surface very clean without burning light-transmitting plastic, thus realizing light-transmitting key laser processing! YAG laser marking machine, the general laser marking machine can not do through the key! Light transmission keys, also called light transmission buttons, are widely used in electronic products. In dark environments, they can accurately and accurately find each button. The light transmission keys include a light transmission key body, an electronic switch located below the key body, and a luminous body. The luminous body is arranged on the lower side of the key body. A light guide body is arranged below the key body, and the light guide body has a body, the upper side of the body extends an extension to the position where the electronic switch is located, the outer surface of the extension is a first reflective slope, the lower surface of the body is a second reflective slope and doubles as a light touch surface that can be contacted with the electronic switch, and a light input part connected with the extension part and arranged corresponding to the light emitting body, the light emitting body emits light, the light is emitted to the first reflective slope through the introduction portion, and is reflected by the first reflective slope into the body, and the light entering the body is reflected by the second reflective slope out of the key body. The structure makes the light emitted from the light emitting surface of the key body more uniform, the key is more beautiful, and the user can accurately find the corresponding function key. The pattern and text on the keys are processed by laser typing! In our life, there are many keys and buttons that use laser typing and can transmit light, such as mobile phone keys, car audio keys, computer keys, and various electronic and electrical keys! www.mingzhen2006.com