Will there be any adverse effects on the injection molding machine after the servo modification?

Comparison of revenue before and after the transformation of injection molding machines.

1 The status quo before the renovation.

The fixed pump runs through the power frequency of the asynchronous motor, and the pressure oil above the system is returned to the oil through the relief valve, which has high oil temperature, high noise, large hydraulic oil leakage, high user electricity cost and troublesome maintenance; It can provide high pressure, and the variable displacement pump can save some power compared to the fixed displacement pump, but it still cannot avoid all the disadvantages of the fixed displacement pump, and the life of the pump is reduced.

2 Earnings after the transformation.

Energy saving: Compared with the traditional fixed pump and variable system, the servo oil pump control system combines the fast stepless speed regulation characteristics of the servo motor and the self-adjusting oil pressure characteristics of the hydraulic oil pump. Huge potential for energy savings.

Measured by the magnitude of the motor current at different oil pressures, our drives basically maintain linear changes in output current and oil pressure.

2) Fast response speed: the shortest response time can be up to 20ms, which improves the response speed of the hydraulic system.

Precise: (1) Position repeatability: the fast response speed ensures the accuracy of opening and closing, and the position accuracy of the end point of the injection can be achieved; With precision molds, the injection molding accuracy can be achieved.

2) Pressure control accuracy: The high-precision, high-response PID algorithm module makes the system pressure very stable, and the pressure fluctuation is positive and negative, which improves the molding quality of plastic products.

Silent: The servo energy-saving injection molding machine equipped with a low-noise screw pump is much lower than that of the ordinary injection molding machine under the control of the excellent PID algorithm module, achieving silent operation and improving the working environment.

Oil pressure: We achieve 100ms stability without overshooting, which is higher than the industry level, but we need a suitable regulator gain.

Cost: After applying this system, the oil consumption is less, the maintenance cost of the injection molding machine is saved, and the operating cost is very objective.

Servo is a kind of closed-loop control system, which is theoretically the best, but in fact depends on the accuracy of the hardware and the rationality of the transformation. Therefore, reasonable modification will not have an impact.

Whether there is any adverse effect on the servo transformation of the injection molding machine for the injection molding machine has a lot to do with whether the company you choose is professional or not. Laipule professional injection molding machine transformation for many years, it is worth believing!

After the servo transformation is completed, it is necessary to prevent problems such as whether the pressure and flow are stable, and whether the process is stable when adjusting.

The reasons and solutions for the servo motor not to be enabled are as follows: 1) In the first case, the fuse is blown out. In this case, the motor is OK after replacing the fuse.

2) In the second case, the power switch is broken, replace the power switch. Judging method: turn on the power switch, use the multimeter ohmic file to measure the resistance between the input end and the output end of the power switch, if the resistance value is zero, it is normal, if the resistance value is infinite, the power switch is bad, and the power switch should be replaced.

3) In the third case, the Hall position sensor is broken. The specific diagnosis method is to use the multimeter DC voltage to measure the output voltage of the green line at the output end of the handlebar, if there is a voltage output, the handle is normal, if there is no voltage output, the handle burns out, and the handle needs to be replaced. 4) Bad controller.

Use the multimeter DC voltage level to measure the red wiring at the output end of the controller (the plug of the adapter wire), if there is a voltage output of about 5 volts, the controller is normal, if there is no voltage output, the controller is burned out, and the controller needs to be replaced. 5) If the connectors of the motor are loose, check each connector again. It may also be that the battery box is not in place when it is placed in the frame, and the contacts are not in good contact.

6) In the last case, the motor burns out. Disconnect the connection between the motor and the controller, connect the rest of the wires, slowly rotate the motor, measure the Hall line with a multimeter to see if the signal has a voltage change, if there is no change in one phase, it is the first orange Hall component of the motor to burn off, resulting in a lack of phase, and the motor needs to be replaced. Expand the information to judge whether the servo motor is normal, first, twist the key starvation axis of the servo motor with your hand to see if it is locked, if it is not locked, see if the servo on is turned on, and whether the servo drive has an alarm.

In addition, the servo motor cannot be turned on to rotate, and you need to send a pulse signal or start signal to drive it.

The servo injection molding machine is to add a servo drive machine to the foundation of the injection molding machine. The disadvantages are as follows:

1. Vulnerability. After the servo drive system is installed, the servo drive system will have the possibility of failure and damage, which is one more failure point than the injection molding machine without the servo drive system.

2. The power loss of the oil pump motor in the whole working process of the servo injection molding machine is serious, and the power utilization rate is only 30%-70%, so the power saving space is relatively large.

The working principle of the injection molding machine is similar to that of the syringe for injection, which is the process of obtaining the product after curing and shaping with the thrust of the screw (or plunger) to inject the plasticized plastic injection into the closed mold cavity with the help of the thrust of the screw (or plunger).

The injection molding machine is usually composed of an injection system, a mold clamping system, a hydraulic transmission system, an electrical control system, a lubrication system, a heating and cooling system, and a safety monitoring system.

The difference between the two is the motor.

Ordinary injection molding machine: non-stop operation, even if the machine action stops, the motor does not stop spinning.

Servo injection molding machine: each different action will be powered by the corresponding power, it is better to not move the machine, and the servo motor will stop completely.

The high-speed injection molding machine is an all-electric motor, and the ordinary injection molding machine is a hydraulic injection molding machine, while the hydraulic injection molding machine is relatively slow. At present, the servo motor used in the all-electric injection molding machine realizes the opening and closing of the mold, the ejection and demolding, and the injection and storage of raw materials. And so on, the operation speed is fast and precise, which greatly improves or improves the production environment and production efficiency.

However, servo-electric injection molding machines are currently only available with clamping forces of up to 850 tons.

In contrast, the servo energy-saving system divides the power system of the injection molding machine into 6 major elements, namely servo motor, encoder, gear pump, servo drive, pressure sensor and drive control module. Among them, the drive control module is the key and core that distinguishes it from traditional injection molding machines. Its specific working process and key technologies can be summarized as follows:

1.The servo drive accepts the pressure (p) and flow rate (q) commands from the injection molding machine controller and converts them into rotational speed commands and transmits them to the servo motor. The servo motor drives the gear pump to rotate, and the gear pump outputs the pressure flow according to the command, and the pressure sensor collects the system pressure information and feeds it back to the servo drive, and the servo motor feeds back the speed information to the servo drive.

Subsequently, the servo drive feeds back the actual pressure and flow information to the injection molding machine controller via conversion. By comparing the actual flow rate and pressure with the command flow and pressure, the injection molding machine controller adjusts the command flow and pressure in a timely manner, so as to achieve closed-loop control.

2.The response speed of the servo system can be achieved, much larger than that of the variable pump, thus significantly improving the control accuracy.

3.Another key design point of the system was the selection of the right servo system for the injection molding machine. Here, this injection molding machine changes the design method of the power configuration of the injection molding machine:

The power configuration of the injection molding machine is selected directly from the product requirements, and the pressure, flow and time requirements of each step of injection molding need to be listed, so as to calculate the actual power required for each step, and then calculate the power of the whole cycle, so as to determine the selected servo power configuration. The advantage of this is that the power requirements are strengthened and clarified from the details of each step, so that it not only meets the production requirements of the product, but also can fully meet the production requirements, so as to control energy waste from the source and achieve energy-saving effects.

First of all, it should be **. **Compared with the one without servo, it is at least about 10,000 behind.

Secondly, the degree of vulnerability. After the servo drive system is installed, the servo drive system will have the possibility of failure and damage, which is one more fault point than the injection molding machine without the servo drive system.

The main disadvantage of servo-electric injection molding machine is the ball screw, the linear slider part needs lubricating oil and the lubricating oil is frequently replaced. The bearings will wear out, and the servo motor controller must be repaired after a problem.

Injection molding machines are also known as injection molding machines or injection machines. It is the main molding equipment for making thermoplastics or thermosets into plastic products of various shapes using plastic molding molds. It is divided into vertical, horizontal, and all-electric type.

The injection molding machine heats the plastic and applies high pressure to the molten plastic, causing it to be injected and fill the mold cavity.

Servo motor selection:

1. Confirm the speed and encoder resolution.

2. The calculation and selection of regenerative resistance, for servo, generally more than 2kw, should be configured.

3. Conversion of load torque on motor shaft and calculation of acceleration and deceleration torque.

4. Calculate the load inertia, the matching of inertia, Yaskawa servo motor as an example, the inertia matching of some products can reach 50 times, but the smaller the actual better, so that the accuracy and response speed are good.

5. Cable selection, encoder cable twisted pair shielding, for Yaskawa servo and other Japanese products, the absolute encoder is 6 cores, and the incremental type is 4 cores.

According to the maximum flow rate required by your machine and the displacement of the oil pump to determine the maximum speed required by your motor, calculate the power of the motor according to the pressure and maximum flow of the system, the theoretical calculation is troublesome, the most direct way is to find the servo system of the first business to ask for information, he will provide you with selection according to the pressure and flow of your machine, in general, this selection is available!

This match is exquisite, the power is constant, the maximum flow, the highest pressure, the specific situation depends on your machine.

According to the flow rate and pressure of the machine.