Preparation method of impact-resistant UPVC cold-bending electrical bushing

Abstract

The invention discloses a preparation method of an impact-resistant UPVC cold-bending electrical bushing. The impact-resistant UPVC cold-bending electrical bushing comprises the raw materials of UPVCresin, light calcium carbonate, composite stabilizer, titanium dioxide, impact-resistant modifier, paraffin, stearic acid, chlorinated polyethylene, weather-proof auxiliary and processing modifier. Byuse of the raw materials, the electrical bushing has good impact resistance; a vacuum cooling setting device for cooling setting of the electrical bushing is used for performing cooling setting twiceon a high-temperature UPVC cold-bending electrical bushing blank by use of cold air and clear water, so that the temperature reduction rate of the high-temperature UPVC cold-bending electrical bushing blank is high, the cooling effect is good, and the device is high in cooling setting efficiency and good in setting effect; and cyclic use of the cold air is realized through the device, temperatureand pressure dynamic balance in the device is maintained, energy consumed by the device is low, cyclic use of water resources is completed, and waste of the water resources is avoided.

Description

technical field [0001] The invention relates to the technical field of electrical bushing production, in particular to a preparation method of an impact-resistant UPVC cold-formed electrical bushing. Background technique [0002] Electrical bushings are used in normal indoor environments and places with high temperature, dust, vibration and fire hazards, and can also be used in humid places. The ambient temperature is -15°C to +40°C, and the working pressure exceeds 2.5Mpa, but The existing electrical bushings still have the following deficiencies: (1) The existing electrical bushings have low compressive strength, poor impact resistance, are easily damaged during use, and have a short service life. [0003] Therefore, the vacuum cooling and setting device for electrical casing cooling and setting is particularly important. The patent application number of 201320004989.4 discloses a vacuum setting device. The cooling setting of the vacuum setting device is reliable, and the ...

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of preparation method of impact-resistant UPVC cold-formed electrical bushing: (1) by using UPVC resin as main material, by adding light calcium carbonate, improve the UPVC resin Stability, effectively improve the hardness and heat resistance of the product, composite stabilizer, titanium dioxide can effectively enhance the light stability of the product, avoid the aging of the electrical bushing, effectively prolong the service life of the product, impact modifier, The thermodynamic compatibility between the processing modifier and UPVC resin is good, so that the electrical bushing has high impact strength at room temperature or low temperature, which solves the problem of low compressive strength and poor impact resistance of the existing electrical bushing , is easy to be damaged during use, and has a short service life; (2) the air cooler cools the air, and releases cold air through the first cooling pipe from the cold air intake pipe into the low-temperature layer in the plastic tube, making the plastic tube When the temperature drops, the high-temperature UPVC cold-formed electrical casing blank is cooled for the first time, and the high-temperature UPVC cold-formed electrical casing blank continues to be transported forward, and the circulating water pump pumps out the clear water in the water tank from the inlet pipe to the diversion water pipe, and the diversion water pipe The clear water is sprayed out through the nozzle, and the water sprayed out of the nozzle cools the high-temperature UPVC cold-formed electrical casing blank for the second time, which solves the problem of cooling and shaping the tube blank through water cooling in the existing vacuum shaping device, and the efficiency of cooling and shaping (3) The cooling fan cools the air and releases cold air through the first cooling pipe from the cold air inlet pipe into the low-temperature layer in the plastic pipe, and the high-temperature UPVC cold-formed electrical casing blank After cooling down, the cold air after heat exchange is pumped out by the blower through the ventilation pipe and sent back to the cooling fan. The water cools the high-temperature UPVC cold-formed electrical casing blank, the spray water leaks from the leak hole on the deflector plate, passes through the diversion groove, and is discharged from the drain pipe from the forming chamber and returned to the water tank. The air passes through the second cooling pipe and enters the water tank to cool down the water in the water tank, completing the circulation of cold air and water, and solving the problem that the existing vacuum setting device consumes a lot of energy and causes a lot of water resources when cooling with water the problem of waste

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