Bitpass: The Control System Of Small Blister Packing Machine
 Dec 13, 2019|View:613

Product application:

A small blister packing machine is designed and manufactured for small pharmaceutical factory, health product factories, food factory, hospital preparation room, etc. It is mainly used for packing capsules, tablets, pills, suppositories, milk tablets, candy, hardware, and other solid drugs and food.


Product features:

The small blister packing machine does not lose blisters when it is shut down and started, so as to avoid the waste of packing materials. Filling blister thermal seal printing batch number plate blanking can be a continuous operation. In motor control, servo, frequency conversion, and electromechanical Opto pneumatic integrated automatic control technology are adopted, and visual inspection techniques are used. Innovative design is carried out in strict accordance with the requirements of GMP standards.


Main technical parameters of DPP-250c equipment:

Production capacity: 50-100 plates / min

Charging frequency: 15-35 strokes / minute

Maximum forming area: 110 x 240mm

Travel range: 60 ~ 120mm

Plate specification: 57 x 80mm

Main motor power: 1.5kw


Electrical system composition:


Name

Model

Brief technical description

Panasonic PLC

FPXH-C60T

Master control

AFPX-A21

Analog I / 0 plug-in

Panasonic servo driver

MCDKT3520

750W

Panasonic servo motor

MSMJ082G1U

750W

Panasonic vision system

PV200

Detection element

Frequency converter

ACS510-01-04A1

1.5KW

Panasonic fiber optic sensor

FD-31

Detection distance 0 ~ 125mm

Panasonic fiber amplifier

FX-501

Matched with optical fiber sensor

Touch screen

TP6070

7 inches



Main structure:

The following is an example of a DPP-250c flat type small blister packing machine. The main mechanism of this machine is the heating mechanism, forming mechanism, heat sealing mechanism, indentation mechanism, and punching structure. The working principle of this machine is as follows:

Main structure Of small blister packing  machine


Working principle of mechanical part:

Working principle of small blister packing  machine part


In this system, the variable-frequency motor is debugged by planetary friction type step-less speed change of the rotating arm and driven by the mechanical transmission chain to realize the movement of the whole machine, blister forming, heat sealing and printing batch number, pressing and tearing line, plate traction, punching, and forming, etc. in accordance with the requirements.


1.1 blister forming

Start-up the heating, the upper and lower heating plates are closed, PVC plastic sheets are preheated between the upper and lower heating plates, and then enter the blister forming die under the action of traction after preheating. The forming upper die is fixed, the forming lower die rises to the upper limit under the action of the mechanical cam and compresses the PVC plastic sheet. At this time, the air valve is opened, the compressed air forming upper die passing through the filter pressure reducing valve enters the forming lower die cavity, and the PVC plastic sheet is positively pressed.


1.2 charging

After the PVC plastic sheet is shaped into SD specific shape, the feeder will send the packed items into the blister.


1.3 heat seal

The filled PVC plastic sheet and aluminum foil enter into the heat sealing mold and flat sealing platform, and the production batch number or other marks are marked at the same time.


1.4 indentation

After hot sealing, PVC aluminum foil or aluminum foil composite enters into the indentation die to press the tearing line (no need to press the plate, no need to install the indentation die block)


1.5 blanking

The manipulator will send the compound after heat sealing and indentation into the blanking die. After blanking, the finished product is separated from the waste, and the finished product is output automatically.


The above processes are carried out synchronously by using a frequency conversion motor and an intermediate connecting rod.


Electrical control

1.1 traction part

Through the working stroke of the cam at the forming part and the heat sealing part of the blister, we can calculate the time of the thrust motion, the far rest motion, the return motion, and the near rest motion.


When forming, when the cam of the heat sealing part is in the pushing motion state, the fixed mechanical air clamp hand is released, the dynamic mechanical air clamp hand is clamped, and the PVC sheet metal is pulled forward.


When the cam is in the far rest position and the whole machine is in the working state, the fixed mechanical air clamp hand is clamped, the pneumatic clamp hand is loose, and all working parts start to work, including preheating, blister forming and completion of heat sealing.


When the cam is in return motion, the fixed mechanical air clamp hand is clamped, and the dynamic mechanical air clamp hand is reset under the action of the spring force.


When the cam is in the near resting position, the fixed mechanical air clamp hand is released, and the dynamic mechanical air clamp hand is clamped to pull the PVC sheet forward.


This part can also use servo motor as traction power.


1.2 waste blanking part

Since a waste detection device is installed between the forming part of the foam cover in the middle of the case and the heat sealing part, when the detection mechanism finds that there is a free pill, it will immediately send an electrical signal to the PLC controller, and then the PLC controller will send a command to control the movement of the cylinder in the blanking part, which is to open the blanking valve and drop the waste into the waste recycling device.


1.3 testing organization

In the process of charging, there may be the phenomenon that the particles are not filled into the blister, so we need to add the detection mechanism. The detection mechanism can be industrial vision system or optical fiber sensor.


The industrial vision system includes camera, lighting, image processing software, which can capture whether the grains on the whole drug plate are installed, and if there is any missing, send the signal to the PLC controller.


An optical fiber sensor is a kind of spot check detection method. One optical fiber sensor can only detect whether there are particles in one blister. Its detection method is to detect the height of the blister when the probe detects the height of the blister. When there are no particles in the blister, the detection height will be higher than the set height when there are particles. Use the above method to spot-check whether the particles are filled.


1.4 discharging mechanism

The discharge wheel is a passive mechanism, usually equipped with a friction brake device that can adjust the friction, so as to control the speed and tension of the discharge wheel and maintain a stable output. The discharging mechanism has a buffer wheel, which is connected by a spring and can swing back and forth. The purpose is to absorb the tension of discharging, keep the material in contact with each roller and prevent the material from breaking.


1.5 receiving mechanism

The material receiving mechanism is active and uses a servo motor. There is a buffer mechanism in front of the receiving mechanism. When the buffer mechanism reaches a certain capacity, let the receiving motor rotate, and use this step-by-step method to receive materials.

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