CN205972138U - High accuracy straight line labeller - Google Patents

Abstract

The utility model discloses a high-precision linear labeling machine, which includes a labeling head, a conveying device, a label inspection electric eye, and an object inspection electric eye. The driving power of the labeling head adopts a stepping motor, and the driving power of the conveying device adopts a servo motor. It also includes the PLC main controller, the PLC main controller starts the servo motor, and the conveying device drives the labeled object to move through the servo motor. When the object detection sensor detects that the labeled object passes by, the PLC main controller enters the external interrupt subroutine, Trigger the high-speed counter, and the high-speed counter reads the pulse number output by the pulse output port of the servo motor. After the high-speed counter counts to the target value, the PLC main controller starts the stepper motor to move continuously until the electric eye detects the gap between the labels. Control the stepper motor to stop after moving to the specified distance, thereby realizing the labeling function; the utility model increases the labeling accuracy, realizes stepless speed regulation, and can quickly switch speeds to match the production speed of the entire production line, making the production line efficient , smooth.

Description

A high-precision linear labeling machine

technical field

The utility model relates to the technical field of product packaging, in particular to a high-precision linear labeling machine.

Background technique

For production enterprises that need product packaging, labeling machines are indispensable machines. The labeling machine is a device that sticks rolls of self-adhesive paper labels (paper or metal foil) on PCBs, products or prescribed packaging. Labeling machines are an integral part of modern packaging.

The labeling machine is divided into a linear labeling machine and a rotary labeling machine. At present, most of the domestic labeling machines are linear labeling machines. The linear labeling machine is mainly composed of a labeling head and a conveying device. The linear labeling machine The driving power of the labeling head is a servo motor, the driving power of the conveying device is an AC motor, and the labeling error of the linear labeling machine at the same speed is ±1mm. The labeling position at different speeds is inconsistent, and the error of the labeling position at the low speed of 3m/min and the high speed of 30m/min reaches about 5mm.

The labeling error of the linear labeling machine at the same speed is ±1mm, and the labeling position is inconsistent at different speeds. The labeling position error at the low speed of 3m/min and the high speed of 30m/min is about 5mm. The overall labeling The standard accuracy is not high. This shows that there are certain deficiencies in the prior art.

Utility model content

In view of this, in order to solve the technical problem of low labeling accuracy of linear labeling machines in the prior art, the utility model proposes a high-precision linear labeling machine.

The utility model solves the above problems by the following technical means:

A high-precision linear labeling machine, including a labeling head, a conveying device, a label inspection electric eye, and an object inspection electric eye. The driving power of the labeling head is a stepping motor, and the driving power of the conveying device is a servo motor;

It also includes a PLC main controller, the two high-speed pulse output ports of the PLC main controller are respectively connected to the stepping motor and the servo motor, and the object detection electric eye and the label detection electric eye are respectively connected to the interrupt signal input port of the PLC main controller. The high-speed counting pulse port of the PLC master controller is connected to the high-speed pulse output port of the servo motor;

The labeling head is used to drive the bottom paper of the label to move through the stepping motor;

The conveying device is used to drive the labeled object to move through the servo motor;

The electric eye for detecting marks is used to detect the gap between labels;

The object detection electric eye is used to detect the passing of the labeled object;

The PLC main controller starts the servo motor, and the conveying device drives the labeled object to move through the servo motor. When the object detection sensor detects that the labeled object passes by, the PLC main controller enters the external interrupt subroutine, triggers the high-speed counter, and the high-speed counter reads Take the number of pulses output by the pulse output port of the servo motor. After the high-speed counter counts to the target value, the PLC main controller starts the stepper motor to move continuously until the electric eye detects the gap between the labels, and then controls the stepper motor to move to the specified position. Stop after the distance, thus realizing the function of labeling.

Further, the stepper motor is an 86-type stepper motor.

Further, the servo motor is a 750W servo motor.

Further, the belt conveyor belt of the conveying device adopts a chain plate conveyor belt.

Further, the PLC main controller adopts Siemens PLC S7-200SMART.

Compared with the prior art, the beneficial effects of the utility model are as follows:

The linear labeling machine of the utility model increases the labeling accuracy. In the prior art, the driving power of the labeling head of the linear labeling machine uses a 750W servo motor. Because the servo motor accelerates from static to relatively high under the condition of load. At high speed, there will be a momentary stall during the acceleration process. In the process of commanding the driving power motor to move to a specified distance and then stop, because the servo motor has a self-feedback correction function, there will be no out-of-step situation. , the stopping distance of the motor will be larger than the actual distance, that is, the stopping distance of the high-speed label is larger than the small-speed one, resulting in inconsistent labeling positions when the labeling speed changes. The linear sticker of the utility model The driving power of the labeling head of the labeling machine adopts a stepping motor without self-feedback correction function, so this problem does not exist; compared with the AC motor as the driving power of the conveying device, the utility model uses a 750W servo motor as the driving power for the conveying device. The chain-plate conveyor belt in the belt conveyor has the advantages of stable speed, and in the case of changing the speed of the conveyor belt, it is not necessary to use the encoder to feed back the real-time speed, which reduces the mechanical error caused by the installation of the encoder, thereby increasing the speed. Increased labeling accuracy.

The linear labeling machine of the utility model realizes the function of stepless speed regulation. The labeling position error of the linear labeling machine at different speeds is ±0.5mm. In the actual production process, the labeling machine can work at a low speed first. After machine debugging, increase the speed of the labeling machine to reach the actual working speed, which reduces the difficulty of debugging, saves materials, and improves work efficiency. Since the linear labeling machine realizes the function of stepless speed regulation, the speed can be quickly switched To match the production speed of the entire production line, making the production line efficient and smooth.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the control schematic diagram of the utility model high-precision linear labeling machine;

Fig. 2 is the labeling flowchart of the utility model high-precision linear labeling machine;

Fig. 3 is a structural schematic diagram of a high-precision linear labeling machine of the present invention.

detailed description

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the technical solution of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, those of ordinary skill in the art can obtain without making creative work. All other embodiments, all belong to the protection scope of the utility model.

Example

As shown in Figure 1-3, a high-precision linear labeling machine includes a labeling head, a conveying device, a label inspection electric eye, and an object inspection electric eye. The driving power of the labeling head adopts a stepping motor, and the conveying device The drive power adopts servo motor;

It also includes a PLC main controller, the two high-speed pulse output ports of the PLC main controller are respectively connected to the stepping motor and the servo motor, and the object detection electric eye and the label detection electric eye are respectively connected to the interrupt signal input port of the PLC main controller. The high-speed counting pulse port of the PLC master controller is connected to the high-speed pulse output port of the servo motor;

The labeling head is used to drive the bottom paper of the label to move through the stepping motor;

The conveying device is used to drive the labeled object to move through the servo motor;

The electric eye for detecting marks is used to detect the gap between labels;

The object detection electric eye is used to detect the passing of the labeled object;

The PLC main controller starts the servo motor, and the conveying device drives the labeled object to move through the servo motor. When the object detection sensor detects that the labeled object passes by, the PLC main controller enters the external interrupt subroutine, triggers the high-speed counter, and the high-speed counter reads Take the number of pulses output by the pulse output port of the servo motor. After the high-speed counter counts to the target value, the PLC main controller starts the stepper motor to move continuously until the electric eye detects the gap between the labels, and then controls the stepper motor to move to the specified position. Stop after the distance, thus realizing the function of labeling.

In the present embodiment, the stepper motor is an 86-type stepper motor, the servo motor is a 750W servo motor, the belt conveyor belt of the conveying device adopts a chain plate conveyor belt, and the PLC main controller adopts Siemens PLC S7-200SMART.

The linear labeling machine of the utility model is mainly composed of a labeling head, a conveying device, a label inspection electric eye and an object inspection electric eye. The driving power of the labeling head of the linear labeling machine is a 86-type stepping motor, and the driving power of the conveying device is 750W. The labeling of the linear labeling machine is divided into two processes, the stop process of the labeling head and the labeling process.

The labeling head drives the bottom paper of the label to move through the stepping motor until the label inspection electric eye detects the gap between the labels, and then commands the stepping motor to move to a specified distance and stop, thus realizing the function of stopping the label.

If the driving power of the labeling head of the linear labeling machine uses a 750W servo motor, when the servo motor accelerates from a static state to a higher speed with a load, there will be a momentary stall during the acceleration process. In the process of commanding the driving power motor to move to the specified distance and stop, because the servo motor has a self-feedback correction function, there will be no out-of-step situation, resulting in the stopping distance of the motor will increase than the actual distance, that is, the speed is high The label stop distance is larger than the label stop distance with a small speed, resulting in inconsistent position of the label stop when the label output speed changes. The driving power of the labeling head of the linear labeling machine of the utility model adopts a stepping motor without self-feedback correction function , There is no such problem, so the 86-type stepping motor is selected.

Compared with the AC motor as the driving power of the conveying device, the utility model uses a 750W servo motor as the driving power. The belt conveyor in the conveying device adopts the chain-plate conveyor belt, which has the advantages of stable speed and the like, and can change the speed of the conveyor belt. Under certain circumstances, it is not necessary to use the encoder to feed back the real-time speed, which reduces the mechanical error caused when the encoder is installed, thereby increasing the labeling accuracy.

The linear labeling machine of the utility model uses Siemens PLC S7-200SMART as the main controller, and the two high-speed pulse output ports of the PLC main controller are respectively connected to the stepper motor and the servo motor, and the object inspection electric eye and the label inspection electric eye are respectively connected to the The interrupt signal input port of the PLC main controller, the high-speed counting pulse port of the PLC main controller is connected to the high-speed pulse output port of the servo motor, which is used for tracking the position pulse (adjusting the labeling position).

In the actual production process, because the labeling position of the labeling machine is inconsistent at different speeds, the machine is debugged at a higher actual working speed when debugging the machine, which increases the difficulty of debugging and wastes materials.

The high-precision linear labeling machine of the utility model adjusts and compensates the labeling position by adjusting the target value counted by the high-speed counter, so that when the speed of the conveying device is switched, the labeling position remains consistent and achieves stepless speed regulation.

The object to be labeled moves at a uniform speed on the conveyor belt, and the label will be attached to the object when the label accelerates from rest to the same speed as the conveyor belt. It takes a certain acceleration time to reach the target speed, so the labeling position at different speeds is inconsistent. In order to achieve the same labeling position when switching speeds and realize the stepless speed regulation function, we need to compensate the labeling position. Adjustment and compensation for labeling position can be realized by adjusting the target value of high-speed counter counting.

The specific method of adjusting and compensating the labeling position of the high-precision linear labeling machine is as follows:

Determine a speed as the reference speed, assuming the reference speed is v ₀ ,

s=t×(vv ₀ )

s is the labeling position error when changing the speed, t is the acceleration time, v is the speed of the conveying device,

The formula for calculating the number of pulses for labeling position adjustment compensation is:

p=s÷d÷π×n

p is the number of pulses for labeling position adjustment compensation, d is the diameter of the pulley, n is the electronic gear ratio of the servo motor,

The reference speed can be set to 3m/min.

When changing the speed, the linear labeling machine compensates the labeling position after the recognition operation. When actually debugging the machine, it is necessary to compare the actual effect and fine-tune the compensation of the linear labeling machine to achieve the best labeling accuracy. .

The linear labeling machine of the utility model realizes the function of stepless speed regulation. The labeling position error of the linear labeling machine at different speeds is ±0.5mm. In the actual production process, the labeling machine can work at a low speed first. After machine debugging, increase the speed of the labeling machine to reach the actual working speed, which reduces the difficulty of debugging, saves materials, and improves work efficiency. Since the linear labeling machine realizes the function of stepless speed regulation, the speed can be quickly switched To match the production speed of the entire production line, making the production line efficient and smooth.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (5)

1. a kind of high accuracy straight line labelling machine it is characterised in that include labeling head, conveyer device, inspection mark electric eye, inspection thing electric eye, The driving power of described labeling head adopts motor, and the driving power of described conveyer device adopts servomotor；

Also include PLC master controller, two high-speed pulse output mouths of described PLC master controller connect motor respectively and watch Take motor, inspection thing electric eye is connected the interrupt signal input port of described PLC master controller, described PLC master control respectively with inspection mark electric eye The high-speed counting pulse mouth of device processed connects servomotor high-speed pulse output mouth；

Described labeling head is used for driving the base stock motion of label by motor；

Described conveyer device is used for driving by labeling object of which movement by servomotor；

Described inspection mark electric eye is used for the gap between label is detected；

Described inspection thing electric eye is used for detecting and is passed through by labeling object；

PLC master controller starts servomotor, and conveyer device drives by labeling object of which movement by servomotor, when inspection thing electric eye Detect by labeling object through out-of-date, PLC master controller entrance external interrupt subprogram, trigger high-speed counter, high-speed counting Device reads the umber of pulse of the pulse delivery outlet output of servomotor, and high-speed counter counts after reaching desired value, PLC master controller Start motor continuously to move, after inspection mark electric eye detects the gap between label, control motor to move to specified Apart from rear stopping, it is achieved thereby that the function of labeling.

2. high accuracy straight line labelling machine according to claim 1 is it is characterised in that described motor is 86 formula stepping electricity Machine.

3. high accuracy straight line labelling machine according to claim 1 is it is characterised in that described servomotor is the servo of 750W Motor.

4. high accuracy straight line labelling machine according to claim 1 is it is characterised in that the belt conveyor of described conveyer device Using chain-plate type conveyer belt.

5. high accuracy straight line labelling machine according to claim 1 is it is characterised in that described PLC master controller adopts west gate Sub- PLC S7-200SMART.