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Application on blister packaging machine
A blister packaging machine is a machine in which a transparent plastic or sheet is made into a blister, and the product is sealed between the blister and the bottom plate by heat sealing, bonding or the like. The products of blister packaging have good sealing performance and good intuitiveness, and are widely used in light industry, medicine and chemical industry. This article focuses on the application of integrated products in blister systems. Platform products, with EtherCAT bus technology, electronic cam, temperature control and other functions to achieve capsule packaging.
The working principle of the blister packaging machine: the forming film is heated and softened by the heating device, and the blister is sucked out by vacuum vacuum on the forming template, and the filling device fills the package into the blister, and then passes through the roller type heat sealing device. The cover film is sealed to the surface of the blister material at a suitable temperature and pressure, and the packaged article is sealed in the blister. After printing, the printing unit prints the batch number and presses the broken line, and finally the punching device is punched into a product section of a certain size.
At present, the plate blister machine and the roller plate type blister machine are widely used on the market, and the punching frequency is generally 50-60 times/min. Although the design of the blister machine is numerous, the process flow is mostly composed of the following basic processes: film transport, heating, forming, filling, heat sealing, typing and punching.
The biggest control difficulty of the roller plate type blister machine is the full servo control of forming and die cutting, and the temperature control accuracy should be within ±2 °C. The blister machine with integrated solution is shown in the figure below. The main structure consists of three parts: forming, heat sealing and die cutting.
The blister packaging machine system is controlled by six motor drives, which are respectively composed of a spindle motor, a clamping feed motor, a heating roller motor, a heat sealing roller motor, a typing die cutting motor, and a die cutting feeding motor.
The spindle motor serves as the reference for the operation of the equipment, and its speed determines the speed of the entire equipment of the blister machine;
The clamping feed motor and the spindle motor have an electronic cam relationship, and the PVC blister that has been formed is pulled forward at a specific position (touch screen setting).
The heat sealing roller motor and the sealing roller motor are operated at the same line speed according to the speed of the device, and the formed PVC blister is pressed together with the aluminum foil;
The type-cut die-cutting motor runs at a constant speed according to the speed of the device, and the eccentric structure causes the typing and die-cutting links to be extended and retracted, thereby typing and die-cutting on the blister;
There is an electronic cam relationship between the die-cut feeding motor and the spindle motor. At a specific position within the cycle, the motor makes a flying shear action to feed the material forward;
There is a tappet relationship between the mechanism of the heating plate and the position of the spindle motor.
The electrical system adopts the Mikawa AM402 medium-sized PLC and IS620N servo, and controls the operation of each axis through the EtherCAT bus. The PID temperature control algorithm is used to complete the temperature control to ensure the accuracy.
From HMI, PLC to servo, the complete FA product system covers almost all the industrial control products required for the blister packaging machinery, and each product has its own independent advantages and can achieve high compatibility with EtherCAT bus technology. .
After the implementation of the integrated solution of the blister packaging machine, the structure of the blister packaging machine is greatly simplified compared to the single servo system, and the various mechanisms are independent of each other, facilitating mechanical maintenance. In addition, the accuracy of the equipment and the temperature control accuracy are also greatly improved, and the punching frequency can reach 180 times/min, which improves the production efficiency of the customer.
The working principle of the blister packaging machine: the forming film is heated and softened by the heating device, and the blister is sucked out by vacuum vacuum on the forming template, and the filling device fills the package into the blister, and then passes through the roller type heat sealing device. The cover film is sealed to the surface of the blister material at a suitable temperature and pressure, and the packaged article is sealed in the blister. After printing, the printing unit prints the batch number and presses the broken line, and finally the punching device is punched into a product section of a certain size.
At present, the plate blister machine and the roller plate type blister machine are widely used on the market, and the punching frequency is generally 50-60 times/min. Although the design of the blister machine is numerous, the process flow is mostly composed of the following basic processes: film transport, heating, forming, filling, heat sealing, typing and punching.
The biggest control difficulty of the roller plate type blister machine is the full servo control of forming and die cutting, and the temperature control accuracy should be within ±2 °C. The blister machine with integrated solution is shown in the figure below. The main structure consists of three parts: forming, heat sealing and die cutting.
The blister packaging machine system is controlled by six motor drives, which are respectively composed of a spindle motor, a clamping feed motor, a heating roller motor, a heat sealing roller motor, a typing die cutting motor, and a die cutting feeding motor.
The spindle motor serves as the reference for the operation of the equipment, and its speed determines the speed of the entire equipment of the blister machine;
The clamping feed motor and the spindle motor have an electronic cam relationship, and the PVC blister that has been formed is pulled forward at a specific position (touch screen setting).
The heat sealing roller motor and the sealing roller motor are operated at the same line speed according to the speed of the device, and the formed PVC blister is pressed together with the aluminum foil;
The type-cut die-cutting motor runs at a constant speed according to the speed of the device, and the eccentric structure causes the typing and die-cutting links to be extended and retracted, thereby typing and die-cutting on the blister;
There is an electronic cam relationship between the die-cut feeding motor and the spindle motor. At a specific position within the cycle, the motor makes a flying shear action to feed the material forward;
There is a tappet relationship between the mechanism of the heating plate and the position of the spindle motor.
The electrical system adopts the Mikawa AM402 medium-sized PLC and IS620N servo, and controls the operation of each axis through the EtherCAT bus. The PID temperature control algorithm is used to complete the temperature control to ensure the accuracy.
From HMI, PLC to servo, the complete FA product system covers almost all the industrial control products required for the blister packaging machinery, and each product has its own independent advantages and can achieve high compatibility with EtherCAT bus technology. .
After the implementation of the integrated solution of the blister packaging machine, the structure of the blister packaging machine is greatly simplified compared to the single servo system, and the various mechanisms are independent of each other, facilitating mechanical maintenance. In addition, the accuracy of the equipment and the temperature control accuracy are also greatly improved, and the punching frequency can reach 180 times/min, which improves the production efficiency of the customer.