Application of Brushless Variable Resistance Starter in Rubber Mixer

2021-08-08

Application of Brushless Retarder Starter on Rubber mixer Guizhou Tyre Co., Ltd. is a leading enterprise in the rubber industry in Guizhou Province. It was restructured and listed in 1996 and is now ranked in the top ten tire industry in the country. Rubber mixing is an initial process for tire manufacturing. The quality and production value of tires are directly affected by the quality and output of plastics produced by the rubber compounding plant. It is crucial to ensure that the rubber compounding equipment operates properly. My branch currently has 16 large-scale plastic mixing production lines. Each production line is equipped with an internal mixer, a tablet press, and a film cooling device. The motor power of the mixer and tablet press of our factory is from 55KW to 240KW, and all the winding AC asynchronous motors are used. The starting method is the traditional rotor current limiting start (rotor loop series frequency sensitive rheostat control). In the actual production and operation process, the electrical control part has more failures. If a single tablet press fails, it will directly lead to the shutdown of the entire production line, which will seriously affect the unit's operating rate, restrict the completion of the production plan, and reduce the company's output. In May 1994, after the research and phased trial of the brushless variable resistance starter by our branch, it was confirmed that the technical requirements for reducing the motor starting current can be achieved and the consumption of spare parts can be reduced. Since 1996, our branch has gradually reconstructed nearly 30 winding AC induction motors, all of which have changed to brushless variable resistance starters. Comparison of implementation results before the transformation of the transformation table 1, the spare parts are expensive, maintenance and preparation 1, small investment, maintenance and spare parts storage costs are high. Reduced preparation costs. 2, high failure rate. 2, greatly reduce the failure rate. 3, heavy quality, maintenance and replacement difficulties. 3, maintenance and replacement is convenient. 4, the supporting control circuit is cumbersome, fault 4, the circuit is simplified, the control is convenient and hidden. Use to reduce hidden dangers. 5, start the shock, current is large. 5. Eliminate start-up vibration and reduce start-up current. Through the transformation of the electrical control of the equipment, we have mastered the application of new technologies and New Products; this not only saves the cost of maintenance and spare parts; it reduces the maintenance difficulty of maintenance personnel and reduces the maintenance time; it also reduces the safety caused by safety The accident has made the safety production of branch plants reach a higher level; at the same time, it has also ensured that the equipment can be operated in a long period and with high efficiency in order to meet the needs of production. This successful technological transformation has greatly encouraged the enthusiasm of technicians, provided us with experience in retrofitting, effectively solved the problems in practical work, and laid a solid foundation for improving the operating rate of equipment and the reliability of equipment operation.

Internal rubber mixer mainly used for rubber molding and mixing of rubber, is a machine equipped with a pair of specific shapes and relative to the rotation of the rotor, adjustable temperature and pressure in the sealed state of the polymer material on the plastic and mixing of the mechanical, mainly composed of the mixing chamber, rotor, rotor seal device, feeding pressure material device, discharge device, transmission and chassis and other components.

This machine is suitable for EVA, rubber,synthetic rubber,hot melt and all kinds of chemistry raw material

to mix ,mediate and disperse, and then put into the mass production.

75L kneader mixer

Hard tooth gear reducer with well-design structure, low noise, high efficiency and long service life. The mixing shaft is made of nickel & chrome alloy steel. The high abrasion part is additional welded with imported anti abrasion welding rod, then electroplating with hard chrome which is more durable.The main mixing chamber is whole set casting by high anti abrasion alloy steel, after special dealing then electroplating with hard chrome.The anti leakage unit of side wall is made of high-tech material which is wear-resisting and easy to maintain. [M" shape of the pressure gland which make the mixing more thorough and even.  The main motor ampere meter is installed in the electrical control panel, under normal running, when the pressure of the mixing chamber is too big, the current exceeds the set value, the connector will automatically adjust the gland`s up and down via the magnetic valve to remit the pressure of the mixing chamber. The mixing chamber is bigger, the diameter of the air cylinder is bigger and gear reducer is also bigger, which enhance the mixing effect,save mixing time and also save the cost.

Main parameter

Mixing capacity(L)	75L
Motor power	110KW 6P AC
Material feeding	Front/back
Temperature adjustment	Steam heating or water cooling
Mixing capacity per batching	About 70-80kgs/time
Mixing time	4-8mins/batching
Rotor RPM	RPM
Temperature difference	±5º
gear reducer	ZLY375
Gear width	Input 110mm, output 140mm
Tilting angle	140°
Main air cylinder size (mm)	360×900
Piston rod diameter (mm)	120
Mixing chamber size (mm)	610×600×725
Two rotors center to center space (mm)	355
Rotor bearing diameter (mm)	140
Machine size(mm)	3900x2900x3400
Machine weight(kg)	9500

Internal Mixer, Turnover Internal Mixer, Internal Rubber Mixer, Pressure-Type Internal Mixer
Lanhang Machinery Co., Ltd. http://www.longxuanmachines.com