Professional Plastic Injection Molding Equipment For Helmet Making

Servo motor can optimize acceleration and deceleration. Its rotor uses a small diameter to reduce inertia, and a long rotor to recover the lost torque. Of course, the inertia increases with the length of the rotor, but only linearly. From the appearance of the servo motor, it is obvious that its diameter is small but its length is large. Servo motors only need 0.05 seconds from 0 to 2000 rpm, so using variable speed servo motors to drive oil pumps can only slow down productivity in less than 5 seconds cycle. The permanent magnet is used to generate the magnetic field of the rotor, and the copper loss and iron loss of the rotor are also avoided.

Variable speed of servo motor is realized by frequency conversion principle of controller. The AC current of 50Hz or 60Hz is converted to the required frequency after rectification and drives the servo motor. Therefore, in different frequency areas, as long as the voltage is suitable, it has no effect. This is different from asynchronous motors. The rotating speed of asynchronous motor at 60Hz is 20% faster than that at 50Hz. The controller also has feedback control of pressure and speed, and PID control of pressure and flow rising and falling.

Servo motors are virtually identical to generators. What kind of function to play depends on how to drive it, supply three-phase electricity, it is a motor; supply power to rotate its spindle, it is a generator. Servo motors change into generators when braking (e.g. open-mode shutdown). Mould-locking cylinders are driven by inertia (kinetic energy) of the moving template and the moving model, and then oil pumps are driven (when the oil pump changes into an oil motor). Then the spindle of the "generator" is driven to generate voltage. After braking resistance, it turns into electric current, then into thermal energy, and emits into the atmosphere. Although this energy has not been recovered, it also serves the purpose of fast and precise braking.

NINGBO HAIJIANG MACHINERY MANUFACTURING CO.,LTD., situated in Ningbo Yinzhou Investment & Innovation Center, coversa land of more than 50,000M2.It was established in 1992 and now employs a staff of more than 500 people. with CE and ISO9001

Haijiang Company is a hihg-tech enterprise specialized in manufacturing injection molding machine that mainly covers dozens of speci?cations with injection shot of 45-2,0000g and mold clamping force of 400-15,000KN. Based on the marrow of the trade gained and through years' accumulation, the company has made constant innovation to ensure the machine quality.Parts built into the machines of defferent mold locking forces are all processed under specialized management. HJF series injection molding machines are developed by Haijiang Company on the basis of a collection of the advantages assimilated from all world famous brand machines with optimized design realized by CAD/CAM/CAPP where technical problems such as noise of the entire machine and low energy dissipation are removed and thus the design quality of products is secured. The company adopts advanced equipment and technology and applies scientific management. Besides, it has introduced high-precision full automatic CNC machines fitted with imported electric and hydraulic parts, which have tremendously improved the accuracy and steadiness of the whole machine. Its present products such as HJK and KJF series and widely applied in the electronic, automobile and civil industries.
In order to participate in competition in the world market,the company has clustered a group of high quality technical and managerial personnel with innovative spirit by means of optimized combination fo personnel. The company faces the society and users by acting on the principle of pursuit for ?rst class and sincere service. We will appreciate friends from all circles who have given their concern and support to Haijiang machines with first class products and first class after service.