The invention and evolution of the determinant I.S bottle making machine
In the early 1920s, the predecessor of the Buch Emhart company in Hartford was born the first determinant bottle making machine (Individual Section), which was divided into several independent groups, each group It can stop and change the mold independently, and the operation and management is very convenient. It is a four-part IS row-type bottle making machine. The patent application was filed on August 30, 1924, and it was not granted until February 2, 1932. . After the model went on commercial sale in 1927, it gained widespread popularity.
Since the invention of the self-propelled train, it has gone through three stages of technological leaps: (3 Technology Periods up to now)
1 The development of mechanical I.S rank machine
In the long history from 1925 to 1985, the mechanical row-type bottle-making machine was the main machine in the bottle-making industry. It is a mechanical drum/pneumatic cylinder drive (Timing Drum/Pneumatic Motion).
When the mechanical drum is matched, as the drum rotates the valve button on the drum drives the opening and closing of the valve in the Mechanical Valve Block, and the compressed air drives the cylinder (Cylinder) to reciprocate. Make the action complete according to the forming process.
2 1980-2016 Present (today), electronic timing train A.I.S (Advantage Individual Section), electronic timing control/pneumatic cylinder drive (Electric Control/Pneumatic Motion) was invented and quickly put into production.
It uses microelectronic technology to control the forming actions such as bottle making and timing. First, the electric signal controls the solenoid valve (Solenoid) to get electric action, and a small amount of compressed air passes through the opening and closing of the solenoid valve, and uses this gas to control the sleeve valve (Cartridge). And then control the telescopic movement of the driving cylinder. That is, the so-called electricity controls the stingy air, and the stingy air controls the atmosphere. As an electrical information, the electrical signal can be copied, stored, interlocked and exchanged. Therefore, the appearance of the electronic timing machine A.I.S has brought a series of innovations to the bottle making machine.
At present, most glass bottle and can factories at home and abroad use this type of bottle making machine.
3 2010-2016, full-servo row machine NIS, (New Standard, Electric Control/Servo Motion). Servo motors have been used in bottle making machines since around 2000. They were first used in the opening and clamping of bottles on the bottle making machine. The principle is that the microelectronic signal is amplified by the circuit to directly control and drive the action of the servo motor.
Since the servo motor has no pneumatic drive, it has the advantages of low energy consumption, no noise and convenient control. Now it has developed into a full servo bottle making machine. However, in view of the fact that there are not many factories using full-servo bottle making machines in China, I will introduce the following according to my shallow knowledge:
History and Development of Servo Motors
By the mid-to-late 1980s, major companies in the world had a complete range of products. Therefore, the servo motor has been vigorously promoted, and there are too many application fields of the servo motor. As long as there is a power source, and there is a requirement for accuracy, it may generally involve a servo motor. Such as various processing machine tools, printing equipment, packaging equipment, textile equipment, laser processing equipment, robots, various automated production lines and so on. Equipment that requires relatively high process accuracy, processing efficiency and work reliability can be used. In the past two decades, foreign bottle making machine production companies have also adopted servo motors on bottle making machines, and have been successfully used in the actual production line of glass bottles. example.
The composition of the servo motor
Driver
The working purpose of the servo drive is mainly based on the instructions (P, V, T) issued by the upper controller.
A servo motor must have a driver to rotate. Generally, we call a servo motor including its driver. It consists of a servo motor matched with the driver. The general AC servo motor driver control method is generally divided into three control modes: position servo (P command), speed servo (V command), and torque servo (T command). The more common control methods are position servo and speed servo.Servo Motor
The stator and rotor of the servo motor are composed of permanent magnets or iron core coils. The permanent magnets generate a magnetic field and the iron core coils will also generate a magnetic field after being energized. The interaction between the stator magnetic field and the rotor magnetic field generates torque and rotates to drive the load, so as to transfer the electrical energy in the form of a magnetic field. Converted into mechanical energy, the servo motor rotates when there is a control signal input, and stops when there is no signal input. By changing the control signal and phase (or polarity), the speed and direction of the servo motor can be changed. The rotor inside the servo motor is a permanent magnet. The U/V/W three-phase electricity controlled by the driver forms an electromagnetic field, and the rotor rotates under the action of this magnetic field.At the same time, the feedback signal of the encoder that comes with the motor is sent to the driver, and the driver compares the feedback value with the target value to adjust the rotation angle of the rotor. The accuracy of the servo motor is determined by the accuracy of the encoder (number of lines)
Encoder
For the purpose of servo, an encoder is installed coaxially at the motor output. The motor and the encoder rotate synchronously, and the encoder also rotates once the motor rotates. At the same time of rotation, the encoder signal is sent back to the driver, and the driver judges whether the direction, speed, position, etc. of the servo motor are correct according to the encoder signal, and adjusts the output of the driver accordingly.The encoder is integrated with the servo motor, it is installed inside the servo motor
The servo system is an automatic control system that enables the output controlled quantities such as the position, orientation, and state of the object to follow the arbitrary changes of the input target (or given value). Its servo tracking mainly relies on pulses for positioning, which can be basically understood as follows: the servo motor will rotate an angle corresponding to a pulse when it receives a pulse, thereby realizing displacement, because the encoder in the servo motor also rotates, and it has the ability to send The function of the pulse, so every time the servo motor rotates an angle, it will send out a corresponding number of pulses, which echoes the pulses received by the servo motor, and exchanges information and data, or a closed loop. How many pulses are sent to the servo motor, and how many pulses are received at the same time, so that the rotation of the motor can be precisely controlled, so as to achieve precise positioning. Afterwards, it will rotate for a while due to its own inertia, and then stop. The servo motor is to stop when it stops, and to go when it is said to go, and the response is extremely fast, and there is no loss of step. Its accuracy can reach 0.001 mm. At the same time, the dynamic response time of acceleration and deceleration of the servo motor is also very short, generally within tens of milliseconds (1 second equals 1000 milliseconds)There is a closed loop of information between the servo controller and the servo driver between the control signal and the data feedback, and there is also a control signal and data feedback (sent from the encoder) between the servo driver and the servo motor, and the information between them forms a closed loop. Therefore, its control synchronization accuracy is extremely high
Post time: Mar-14-2022