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How to determine the hardness standard of silicone products

Release time:

2020-11-07 11:55

Source:

Dongguan Mingzhen

Silicone tube is the circulation and coating carrier of liquid, gas and other materials. It is widely used in modern industry, national defense industry and daily necessities. When producing silicone tube, a small mistake may make its hardness high. What should I do? If silicone products reduce the hardness of silicone tube and reach the product index, the finished silicone tube cannot change its hardness. This is for vulcanized silicone tube, there are mainly the following methods:.

1. If the cost is not considered, the silica gel key component of the oil can also be increased, and the carbon black parts can be appropriately reduced. If the basic silica gel material has not been produced, the amount of oil must be increased in the formula. The hardness of the finished silica gel tube cannot be changed.

2, or look at what material is the sealing ring silicone tube products, so that it continues to vulcanize, to over vulcanization, can also reduce the hardness, but the performance of the product is not guaranteed.

3. You can use an oven to vulcanize the surface products to return to the original, so as to achieve the purpose of reducing the hardness. The liquid silica gel cannot guarantee the degree index to be achieved.

Rubber tube refers to the tube used for gas transportation, which is commonly used in gas welding, gas cutting, various gas shielded welding, plasma arc welding and cutting, etc. What are the inspection standards for rubber tubes used in silicone rubber products, as follows:.

1. Like hose size measurement: inner diameter, outer diameter, outer diameter of reinforcement layer, wall thickness, concentricity, inner and outer layer glue thickness, inner diameter of assembly, the new national standard and ISO have added length and measurement point marks, and stipulated the measurement method of hose length without pipe joints and joints of various pipe silicone key manufacturers.

2. Hydraulic test verification pressure test: check whether the hose and assembly leak, deform and destroy for 30s-60s under the verification pressure. Pressure deformation test: keep it for 1 minute under the specified pressure (seal working pressure verification pressure or other pressure lower than the verification pressure), and measure the length and outer diameter change, torsion angle and bending of the hose.

Burst pressure test: measure the pressure of rubber products when rubber hoses burst at the specified boosting speed. Leakage test: store for 5min at a static pressure of 70% of the minimum burst pressure and repeat it once to check for leakage or damage. As the test often uses water, which is different from the viscosity of the actual liquid, the burst pressure and leakage pressure measured at normal temperature of rubber keys may be slightly lower.

3. Low temperature bending test Low temperature rigidity: The rubber hose is clamped on a torsion wheel with a diameter of 12 times the inner diameter of the rubber hose. After being parked at low temperature for 6 hours, the ratio of the torque measured when twisting 180 degrees within 12s to the torque measured at standard temperature.

 

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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

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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