General sends the application of transducer of science and technology on extruder

Emphasize requirement of craft of introductory balata extruder and implementation of transducer parameter set to reach its to control a process, common breakdown reachs transducer eliminate step.

Keyword: Vector of extruder of balata of PI7000 transducer frequency control is controlled 1, foreword pushs an one of primary treatment technology that shaping is rubber industry. Sizing material fuses through extruder even fuse-element, below the pressure action that builds in fuse, make screw decides lukewarm, mensurable, constant pressure extruder head continuously, it is to point to use screw extruder (abbreviation extruder) reach its subsidiary engine, make sizing material is in of screw drive below, move continuously ahead, refinance is aided at the mouth semi-manufactured goods that packs an all sorts of place to want form, cooperate by specific subsidiary engine next, will finish crowded piece shape or the process of other operation. Balata squeezes the common procedure that gives goods birth finally to be as follows: Extruder has productivity tall, product quality of a material is even, size is exact, what can realize process is successive change, the structure is simple, the operation is convenient wait for a characteristic, receive wide application in model rubber industry consequently. Extruder has firm demand to the function of drive system, for example, requirement drive system has the starting torsion with high school, flowing motion is characteristic, broad speed / torsion set limits. Because plastic products produces medium wide application in industry and agriculture, because this is plastic,machinery makes one of mechanical industry important trade. Plastic machinery is OK after using frequency control technology managing electric energy (but section report makes an appointment with 20-60% ) , the impact that lessens pair of electrified wire netting, it is report, OK still that implementation green is used raise product quality and yield. Use general to pass 7000 series to communicate the extruder leader drive of transducer, the craft that can satisfy extruder completely asks, achieve necessary craft to dominate index, will look through moving actually, stabler, the adaptability of the product is strong, economic benefits is obvious. 2, the component of balata extruder system squeezes an equipment to reach its to control systematic composition by lead plane, subsidiary engine normally. Normally these component a general designation go out to squeeze group. 2.

The lead plane of 1 balata extruder an extruder lead plane by extruding, drive, heat cooling composition of 3 parts system. Extruding system basically is comprised by screw and machine bucket, acting well in the system of transmission of 　 of crucial part; that is extruder is drive screw, the torque that should assure screw to have a need in working process and 　 of rotate speed; heat cooling system basically assures stock and extruding system the temperature control in processing. 2.

The composition that the subsidiary engine of 2 balata extruder squeezes the subsidiary engine that gives device is decided according to the sort of goods. Say commonly, the reel-up that subsidiary engine shows device of sizing system, cooling device, draw gear, cut and product by the agent or pile up the part such as device is comprised. 2.

The controls systematic extruder control system of 3 balata extruder is main comprise by electromotor of asynchronous of transducer, three-phase, electric equipment, appearance and actuator, its main effect is: (1) control advocate, of subsidiary engine procrastinate use electric machinery, satisfy the rotate speed that craft asks to need and power, assure advocate, subsidiary engine moves can harmoniously. (2) control advocate, the quality of the temperature of subsidiary engine, pressure, discharge and goods. (3) the automation that implements whole set. 3, the control 　 of screw extruder 3.

In the 1 screw extruder system in the tradition, screw by dc machine drive. It is by; of gear case drive directly in the screw below straight drive circumstance below indirect drive circumstance, screw is mixed by leather belt drawing dish drive. Traditional dc machine itself is existing certain defect: For example the brush of dc machine every month is about to change, in much dust or caustic environment dc machine needs to often be cleaned, still need even sometimes from clean cooling air is connected for dc machine outside the workshop. Nextpage 　 　 3.

The defect of extruder of screw of 2 indirect drive depends on: Slippery difference of consist in leather belt, leather belt can cause certain energy loss, more machine increased to wear away with malfunctioning possibility. And the malpractice noise with dc the greatest opportunity is too big, brush strike a light, rotor pollution, electric machinery temperature is exorbitant, exhaust shakes with electric machinery inadequately. Because this uses the screw extruder of dc machine,uphold charge taller, the first price of dc motive is a few higher also. 3.

3 general pass 7000 series transducer to be used at pressing a facility, have the moving character of high quality, the good product performance that can provide because of itself of vector control transducer decides this. : of as relative as traditional transducer characteristic? . ? ) starting torsion is big, client of big; of low speed torsion can reduce electric machinery to use a capacity.

(2) locomotive efficiency is taller, than traditional transducer tower above 3 ～ 6% .

(3) rotate speed precision is tall, power source and laden and fluctuant place bring an influence very low.

(4) piece expect evener; user can save raw material 5% the left and right sides.

(5) rotate speed precision is tall, manufactured goods quality is higher 　 (6) the processor that fast processor offers more high frequency rate to answer general to pass the buy inside transducer, offer tall control to answer frequency and good dynamic performance precision, quickly. The craft of extruder asks the pressure that basically is control exit is constant, when equipment just was beginning the work, undertake rotate speed is controlled, when achieving demand pressure, want switch to be pressure control. Switch process should not have concussion, need the control precision with tall transducer, come reinforce pressure signal. (7) when vector control offers low frequency, tall torque outputs extruder advocate screw roll is driven after drive electric machinery basically passes decelerate of reducer of parallel axis helical gear, constant torsion timing is when traversal speed is changed under fundamental frequency. Use V/f control transducer before, because want to consider the laden torsion that start, the torsion promotion that should set phasing to answer is accurate, if torsion promotion setting is exorbitant, meet when low frequency carries gently excitation is too big, cause electric machinery easily to give out heat badly, the stability that affects facility moves. Use vector control general to pass transducer, function of use self-study be used to is considerable measure electric machinery parameter, not only the output that can make sure electric machinery is good when low frequency is characteristic, general conducts the electricity that the automatic and energy-saving moving function of transducer can follow the change of torsion and reduces output, not only can economic electric energy, can eliminate the possibility that afore-mentioned working hidden trouble produce more. (8) torsion demarcate and turn poor compensation, rotate speed controls precision to be as high as thousand. 4, setting of parameter of transducer part function is expressed as follows: 5, the breakdown phenomenon with common transducer and eliminate step: CNC Milling CNC Machining