Screw adhesive anaerobic adhesive is one of our more common adhesive. Anaerobic adhesive is the use of oxygen on the free radical polymerization principle made of one-component sealant adhesive, can be used for both bonding and sealing, when the adhesive surface is isolated from the air and in the case of catalytic will be able to rapid polymerization at room temperature and curing. And screw adhesive is mainly used in electrical appliances, electronics, aviation machinery, automotive industry. Wherever there are screws will see it. Generally lock the screws will it point in the screw mother. Let it slowly curing, on the one hand, so that the screws in the operation will not fall off, on the other hand, there is a rust effect.
1, screw adhesive, anaerobic adhesive application range
Anaerobic adhesive because of its unique anaerobic adhesive curing characteristics, can be applied to locking, sealing, holding, bonding, plugging and so on. Anaerobic adhesive has become an indispensable liquid tool in the machinery industry. In the aerospace, military, automotive, machinery, electronics, electrical and other industries have a very wide range of applications.
Screw adhesive is used on screws in airplanes, ships, cars, vehicle electronics and other various industries. Others, such as televisions, washing machines, video recorders, motorcycles, cameras, cameras, a variety of home appliances and audio machines can be used on the screws.
2、Difference between full-fixing and half-fixing screw adhesive?
Full-fixed is also known as the articulation of gas screw fixing agent, generally applied to the screw teeth, fixed after the lack of oxygen can not be dismantled, half-fixed are generally applied to the screws after locking point in the screws at the appearance of the fixed, in order to facilitate the dismantling of the future.
3、The role of screw adhesive and anaerobic adhesive
Locking anti-loosening
Metal screws by the impact of vibration is easy to produce loose or offline, the traditional mechanical locking methods are not ideal, and chemical locking methods cheap and effective. If the screw will be coated with screw glue for assembly, after curing in the thread gap to form a strong plastic film, so that the screw locking will not be loose. Now there have been pre-coated (B-204) anaerobic adhesive, pre-coated in the screw, placed on the use (valid for four years), as long as the screws screwed into the tightening, you can achieve the desired anti-loosening effect.
Sealing and Leakage Prevention
Any plane can not be completely close contact, the need for leak-proof sealing, the traditional method is to use rubber, asbestos, metal and other gaskets, but due to aging or corrosion will soon leak. Instead of solid gaskets, screw adhesive can realize close contact after curing, making the sealing more durable. Screw adhesive is used for sealing of threaded pipe joints and threaded plugs, sealing of flange mating surfaces, sealing of mechanical case bonding surfaces, etc., all of which have good anti-leakage effects.
Positioning
Cylindrical components, such as bearings and shafts, pulleys and shafts, gears and shafts, bearings and seat holes, bushings and holes, such as holes and shafts combination of fittings, previously without exception, the use of hot sets, cold pressing and other dimensions of the overfilling method and then assembly, supplemented by keys and pins and so on. This fixing method requires strict processing accuracy, and due to different coefficients of thermal expansion, wear and corrosion, it is easy to produce loose. The use of screw adhesive can fill the fit gap, solid and durable after curing, stable and reliable. Anaerobic adhesive holding method to reduce the processing accuracy requirements, assembly operation is simple, improve productivity, saving performance consumption and processing costs.
4、How long does it take for anaerobic adhesives to fully cure?
Anaerobic adhesives do not contain solvents, so they must be cured. Curing of anaerobic adhesives must be in contact with reactive metal ions and an oxygen-free environment. Outside the bonding area, anaerobic adhesives will not fully cure. Within the bonding area, the cure rate can be controlled by changing the product and primer. Heat can be used to improve the curing speed.
5、How much adhesive is appropriate? How long is the storage life of anaerobic adhesive products?
It is enough to meet the requirement of filling the adhesive layer. Excessive use will not only cause waste, but also lead to migration of the adhesive, causing cleaning problems. Automatic applicators can control the amount of product used on the assembly line. Most anaerobic adhesive products are guaranteed to perform for two years after shipment.
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