Working principle of automatic pillow packaging machine

Working principle of pillow packaging machine

Pillow packaging machine is a kind of packaging machine with very strong packaging ability, which can be applied to

Various specifications of food and non-food packaging continuous packaging machine.

It can not only be used for packaging non-trademark packaging materials, but also make

High-speed packaging is carried out with roll materials printed with trademark patterns in advance.

In packaging production, due to the positioning color printed on packaging materials,

There are errors between the stretching of labels and packaging materials and mechanical transmission.

Due to various factors, the predetermined sealing and cutting position on the packaging material may deviate from the center.

From the right position, resulting in errors. In order to eliminate errors.

In order to seal and cut correctly, automatic positioning must be considered in packaging design.

To solve this problem, most of them are connected according to the positioning marks of packaging materials.

Design of continuous photoelectric automatic positioning system. And continuous photoelectric positioning system.

The working mode of error compensation is divided into forward and backward, braking and two kinds of transmission.

Synchronous dynamic system. This paper mainly introduces the front and rear braking of photoelectric automation.

Design of positioning system.

1 basic principle of braking photoelectric automatic positioning system

Packaging paper is continuously transported, formed, bagged and filled on automatic packaging machine.

In the process of filling and sealing, due to the printing error of the positioning color standard, the machine

Accidental fluctuation of operation and comprehensive factors such as operation make wrapping paper

The conveying speed is not synchronized with the horizontal paper sealing speed, resulting in the paper sealing position.

Deviation, so it needs to be corrected at any time and error compensation is carried out continuously.

Compensation. Comprehensive error is a variable, but because of its high quality and printing.

The accuracy of packaging materials at a certain packaging speed, this error.

In each detection period, the difference should be kept within a small range. this

The samples can be measured regularly (once every two packs) through the photoelectric positioning system.

Measure and compare the paper feeding speed and sealing and cutting speed. If the wrapping paper is too fast,

The positive error system gives a negative compensation, namely the paper feeding mechanism.

Deceleration to realize compensation; If the wrapping paper is too slow, it is a negative error.

The system provides positive compensation to improve the speed of the paper feeding mechanism. but

The given compensation value can not completely eliminate the error, and may overcompensate.

It may not be enough. Even if the mistake is eliminated, it will appear next time.

Therefore, given a

The compensation amount slightly larger than the absolute error value artificially makes it out of tolerance. while

If the measurement error is negative, the excessive positive value will be compensated. then

There must be a positive error after the second measurement and comparison. The positioning system comes from

After a given negative value is dynamically compensated, the negative error reappears.

In this way, the error is controlled within a certain range by alternating positive and negative. this

The cut part of the sample wrapping paper jumps around the correct position. this

The way to realize continuous positioning of wrapping paper once in and once out is called "in"

Retreat "automatic positioning mode. Because its compensation is beyond the clutch.

When the machine is working, the mechanical paper feeding mechanism is designed to have a package when entering the work.

Given the lag effect of paper loading, this principle is adopted for positioning.

This system is called "braking forward and backward" automatic photoelectric positioning system. decision

The transverse sealing and cutting speed of wrapping paper is adjusted based on this speed.

The paper feeding speed is synchronized with it to control the sealing and cutting position error of the wrapping paper,

This is the most basic principle of continuous positioning system.

Analysis of braking forward and backward positioning system

Let's analyze the photoelectric positioning system of front and rear brakes and the transmission of packaging machine.

Dynamic system diagram 1.

The packaging process is as follows: the sheet wrapping paper is led out from the drum 1 and polished.

The electrical detector 2 is formed by a former 5, and a pulling roller 6 and a longitudinal sealing roller 7 are formed.

Make it into a bag. The packaging bag filled with packaging materials is shaped up and down and output,

Convey by that conveyor belt to the transverse sealing head 8, and transversely seal and cutting off the discharged finished product. transmit

Part of it is the main motor M 1 which transmits the motion into the transverse sealing transmission shaft and then does not pass through it.

The constant speed mechanism 9 drives the transverse machine head, and the unequal speed mechanism is used for adjustment.

Adjust the instantaneous sealing and cutting speed of the transverse sealing head 8 to make it move at the same speed as the packaging bag.

Degree synchronization. The other route is adjusted by continuously variable differential 13.

Section can be controlled manually or by single-phase servo motor. regulate

Continuously variable differential mechanism 13 can get the required bag length. finally

It reaches the hook and claw conveyor chain through the differential mechanism 18. The differential mechanism 18 is adaptive.

The power adjusting mechanism is mainly used to adjust the hook and claw conveying chain to be the same as the cross head.

One step.

In the process of packaging, photoelectric sensor is used to detect the movement of packaging paper.

Compare the speed with the transverse sealing speed to judge whether it is slow or fast. By surpassing

The clutch electrical system controls the operation of the overrunning motor M3 or

Braking stops to achieve the purpose of error compensation.

Forty two.

Figure 1 transmission system diagram

1 .2 paper roll. Reflective photoelectric head 3. Packaging 4. Feed roller 5. Line six. Pulling roller 7. Longitudinal sealing roller 8. Cross head.

9. Unequal speed mechanism 10, overrunning clutch 1 1, main motor 12, continuously variable transmission 13, servo motor 14, conveying mechanism 15, and speed regulation.

Mechanism 16 paper feeding photoelectric sensor 17 transverse sealing photoelectric sensor 18 finished product 19 hook and claw differential mechanism

3 Speed detection and wrapping paper length measurement

In order to ensure the accurate positioning, paper feeding speed and level in the packaging process

It is necessary to accurately measure two parameters and produce at the same time.

In the process, the wrapping paper (each piece) is long or short. How to locate it?

Automatically measure the length of wrapping paper in the production process to make it conform to our production settings.

Combination is also important.

The paper speed is measured by photoelectric proximity switch 17. I

Scientists record the pulse period output by photoelectric proximity switch to measure the paper speed.

T paper /T paper whose derivative is 1 is the transmission speed of the paper feed roller. Transverse seal

Cutting speed is measured by photoelectric proximity switch. We cut the knife.

The pulse period output by the speed photoelectric proximity switch is recorded as T-knife, which

The reciprocal 1/T cutter is indirectly calculated by the transverse sealing speed. In packaging

In the design, the wrapping paper is tightly pressed on the paper feeding roller, and the linear speed of the pressing roller is

Is the paper feeding speed of wrapping paper, v paper =πD/T paper, where d is paper feeding.

Diameter of paper roll. Cut length L paper after transverse sealing incision =

V paper t knife =πDT knife /T paper

4 color standard benchmarking method and adjustment

In order to ensure automatic packaging positioning, it is necessary to control the servo motor.

M2 synchronizes the paper feeding speed with the cutting speed of the transverse cutting head. However, on the contrary

As a synchronous system, due to the accidental fluctuation and disturbance of operation.

Dynamic factors will make the original synchronization system out of step. Therefore, we need

In the basic synchronization system, the color code detection and control circuit is added, and with the

Time correction, continuous error compensation. Ensure that the cutting and sealing positions remain the same.

You need to use the color code on the wrapping paper to locate it. Color code positioning

Standard packaging materials, photoelectric detection methods, color label printing, etc.

Make certain demands. As far as packaging materials are concerned, higher density is needed.

Uniformity, smoothness and thickness, and certain tensile strength. light

According to different packaging materials, there are two kinds of electrical detection methods: transmission and reflection.

Kindness Transmission is mainly used for the detection of transparent packaging materials, while reflection

Used for the detection of packaging materials that are difficult to transmit light or cannot transmit light. usually

The design of high-speed packaging machine mostly adopts reflective photoelectric detector.

Method, because it has high detection sensitivity. Color-coded printing is very important

Requirements, positioning color code must have shading or lighting function, and at the same time with the packaging.

The product size and detection method are different, and the positioning color code should be enough.

Sufficient shading area to ensure the reliability of signal during photoelectric detection.

Good packaging materials, correct color code positioning and correct photoelectricity.

Shading reflective sensor can be used to measure color scale, so that color scale can be carried out.

Benchmarks and adjustments.

The pillow multifunctional packaging machine designed according to the above principles and methods,

Equipped with microcomputer-controlled paper length setting adjustment and color code positioning system.

System, completely solve the problem of automatic photoelectric positioning. System high-speed transportation

Stable and reliable, accurate sealing and cutting, it is the most advanced and ideal machine at present.

Type one.

Take the exam and contribute.

1 Xu Lincheng, Principles and Design of Packaging Machinery, Shanghai Science and Technology Publishing House,

1998 19~2 1

2 design principle of Peng Guoxun automatic packaging machine Xi An: Northwest light industry

Hospital, 1983.85 ~ 88

3 Liu Yunxia automatic packaging machine positioning system analysis packaging and food machinery,

2000(2) 8~ 1 1

Analysis of photoelectric automatic positioning system of ginger pillow candy packaging machine

Engineering, 200 1 (5) (208 ~ 2 10)