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Automatic labeling machine-essential knowledge
点击次数:1895 发布时间:2011-09-02
 

Automatic labeling machine - essential knowledge

       Labeling in recent years, the most common form of labeling, the technology is rapidly improving. For pharmaceutical manufacturers, in terms of labeling equipment, or from the sticker to be affixed with the bottle itself, have higher requirements will increase. Now the face of the domestic good and bad markets of varying self-adhesive labeling machines, pharmaceutical manufacturers can choose how to cost-effective self-adhesive labeling machines will be the people's concerns. This will be the main function and control, send standard speed, printing speed and production, special purpose, labeling of the four aspects of quality self-adhesive labeling machines selected points.

    Overview of domestic and international self-adhesive labeling machines, it works are similar, are to peel off the stickers from the transfer plus rolling, but its control and manufacturing are not the same. General Labeling machine body by the label, Roll on body blanching printing agencies, transportation agencies, transmission, chassis and control system components. Among them, the agency also roll paste into roller bottles for flat rolled paste way for round bottles Block Roll on Roll on way. Meanwhile, the state of self-adhesive labeling machines by the bottle discrete, horizontal; by sending sub-standard rate of low, medium and high speed; are posted by the container properties of the cyclotomic bottle, flat bottle, square bottle, long bottles (shaped bottle less in the pharmaceutical industry); veneer required by sub-sided stickers, double-sided stickers; according to label the general characteristics of sub-labels, transparent labels.  

1, from the main menu to talk about choice and control

    Over the past Labeling machine detected the leading edge of the bottle label for the position is sensitive point, because the diameter of the bottle to be different for the corresponding electric eye movement or change the labeling time, if this change in the labeling can not be sure Each bottle of the required position. Now the products with the "automatic calculation of label length" feature, which effectively compensate for these weaknesses. "Automatically calculate label length" in the PLC and servo motor technology combined with the formation of automatic control technology, by detecting when the conveyor belt bottle electric eye, they measured the radius of the bottle, and take the bottle in vitro circular edge of the most prominent point on the paste as standard signal sensing point, that no matter how small the bottle diameter, cylindrical bottles are based on the most prominent point on the edge labeling signal for the induction point, so that electric eye to the distance between the plates do not have to peel to make mechanical adjustments, the Standard time do not have to make other adjustments, which is "automatically calculate label length" in automatic control theory. Such is the proper function of self-adhesive labeling machines the first choice point.

    Synchronization of the speed control on, with self-adhesive labeling machines in addition to the "Automatic calculation of tag length" function, it should also automatically conveyor speed, the standard speed, the standard length of sync adjustment, which is the traditional Labeling Machine The difference is even more stability to ensure quality labeling. Traditional Labeling machine speed control is to rely on human experience and make adjustments, and adjustment difficulties in man-made movement difficult for all synchronization. Without synchronization, labeling process will change frequently, resulting in poor quality labeling.

    In the control system, the preferred (PLC + HMI) control system based, as opposed to the early single-chip (SBC), the use of universal PLC for the master device, PLC control system can achieve the following objectives: ( 1) more stable and reliable; (2) future maintenance more convenient and easier to upgrade; (3) and can be easily carried up and down the line control station.

    Also, take into account the increase in the visual system, which can print the integrity of a character status, and whether with or without a label after label, is complete and other real-time detection, control and alarm.  

2, from the standard delivery rate, speed and yield to talk about printing options

    In the choice of self-adhesive labeling machines, people often only concerned with labeling yields (ie, the number of pieces per minute can be posted), but could not get from standard integrated speed, printing speed, roll speed to be posted simultaneously considered. Of course, labeling the other indicators covering production, but other indicators on the use of quality and speed of development of production plays a key role, it can be observed from the analysis of the merits of the various agencies and potential of the initiative, which is the choice self-adhesive Labeling machine should be a comprehensive study of the reason.

    (1) self-adhesive labeling machines to send standard rate, now often in supporting the production of self-adhesive labeling machines when not able to print the label width and speed to be integrated to confirm, just by the manufacturer of the highest yield index sample for choice is also justified because the manufacturer usually gives the highest yield of the sample target is a label length of a printing method is based on the set. Thus, in the production of self-adhesive labeling machines should first examine the choice of standard speed of its delivery, sent from the standard speed and labeling theory yield relationship: Q = 1000V / (L + a)

    Of which: Q is the maximum speed of sending standard output to calculate the maximum labeling, pieces / min; V standard maximum delivery speed, m / min; L is the length of a single label, mm; a spacing between the label, mm.

    For example, labeling bottles with a diameter of φ36 time, L = 52mm, a = 3mm, V = 25m/min, then Q = 454 pieces / min. That is when you choose V = 25m/min, taking into account other factors, the length L = 52mm labeling, the maximum labeling yield only 400 pieces / min range, not taking into account the speed or change after a longer label.

    The domestic market, generally the largest self-adhesive labeling machines products to send standard speed of 38m/min, and the technical strength of the company sent the product of the maximum speed marked as 70m/min, these indicators can be described: to ensure that the original paste Standard production circumstances, it can adapt to changing label length (variable length); high-speed delivery standard is based on the quality of mechanical hardware, components, configurations and servo control of high technology, manufacturers can not generally made, its value is exactly reflects the manufacturer's technical standards.

    (2) self-adhesive label printing machine speed, the pharmaceutical industry used labeling machine, the batch number printed on the label to reign is particularly important. So, send in the attached self-adhesive labeling machines and Roll on the speed of choice, but also to consider the printing machine with printing speed, whichever is the smallest production capacity in order to be counted as the actual label value.

    Batch number printed on the sticker in the pharmaceutical industry generally based printing blanching, blanching printing ribbon is heated by the first word printed text technology. Why is the pharmaceutical industry blanching Label printing batch number printed on the preferred way? Iron-on inkjet printing and recently compared to a production cost of printing is blanching and equipment maintenance costs low; two are not similar blanching printing ink-jet printing device to print some of the odor will affect the solvent cycle air-conditioning systems; three are ribbon can be recycled, with green side.

    Although blanching printing has its features, but it also has weaknesses, there is a certain limitation is its printing speed, the fastest rate of domestic hot foil printing machines generally at 400 beats / min, over this value is not clearly printed text. It was felt that: self-adhesive label printing with a blanching machine set up to yield only 400 pieces / min, more than 500 pieces / min production of self-adhesive labeling machines will be equipped with ink-jet print.  

3, selected from a special-purpose point of view about

    In bottle labeling, often encounter problems for special purposes, the pharmaceutical production is concerned, may encounter: (1) double-sided stickers; (2) similar to the plastic bottle label surface as release agent caused by decreased adhesion or produce labeling surface "bubble" phenomenon. This is the choice of self-adhesive labeling machines made more specific requirements.

3.1, attached to the choice of two-sided aspect should be considered

    For on the flat bottle, square bottle, round bottle affixed on both sides, at least should consider the following points: (1) label the first to achieve multi-dimensional space can be adjusted to ensure the accuracy of labeling, such as 6-dimensional space of the adjustment; (2) label the first double-roller design, to improve the labeling of tension, in order to facilitate labeling of the standard and long.

3.2, labeling surface is easy to produce "bubbles" in consideration of the issue

    (1) should eliminate static electricity, static electricity can be used to make electrostatic ion fan of the bottle, and taking the label with a static brush to remove static electricity; (2) increasing the pressure on the label label, add label and bottle as much as possible between adhesion; (3) labeling process, where possible, label the bottle into the line of contact, to compley get rid of "bubble."  

4, from the choice about the quality of labeling

    Generally accepted quality requirements for labeling: (1) labeling error ≤ ± 1mm, even if re-labeling of the coincident position repeatedly can achieve this value; (2) after the label affixed surface should fit with the bottle, should be flat, No wrinkles, no "bubble" phenomenon; (3) batch printing legible handwriting, no overlap and blur, and batch-bit error <± 1mm.

    To achieve the above labeling requirement, then, in addition to label quality and reasonable action, but also with the device, so the choice should consider the following points: (1) labeling of flatness, mainly to see the Roll on the rational design of institutions and high-precision processing, the pressure in the Roll on bottle labels and to ensure line contact surface; (2) drive a high component configuration requirements, as the core of the action to send a standard high-precision low inertia servo motors, to ensure that posted standard quality, the system closed loop control, and the motor itself will always be in the correct location of their own compensation; (3) detection method and detection components, but also to ensure the quality and labeling labeling production base, technical strength of the manufacturer changed in the past detection devices detect only label printing imperfections arising, now testing ways to measure the thickness, the use of tags and the gap between the thickness of the resulting changes to control the servo-electric operation, this is the current the best detection method, such as greater reliability; (4) to be able to achieve the perfect label, then the machine control is also very crucial, especially in speed and send the bottle marked speed. It should be noted in the choice of control, production speed signal can be sent by the synchronization system, and then sent to the servo motor calculated by the analysis, requiring both speed matching; (5) component configuration, as today's high-speed labeling machine is built on continuous operation , and its rapid response to the various components required, all actions are to be completed in an instant, the configuration of the detection devices are also requested. For example, servo motors labeling, labeling motor drives, conveyor motors, reel motors, separation of the motor, inverter, electric eye label, label detection electric eye, the collection of paper to stop the proximity switch, programmable controller, man-machine interface elements are configured requirements.  

5, label and print settings selected

5.1, the choice of label

    Labeling machines are used to label roll, label quality will directly affect the quality of labeling, the label printing process, cutting, slitting, static and dust processing is also more important. The basic requirements of self-adhesive label shown in Table 1.

    Table 1, the basic requirements of Label

62g white glassine paper, paper end, paper compact, has good internal strength and light transmission, easy to tear, cutting is good

Basis Weight 62g/m2 ± 5%

Thickness of 55μm ± 5%

Tensile strength machine direction: 16kg/25mm; horizontal: 7kg/25mm

Machine direction tear degree: 25 g / Zhang; horizontal: 31 g / sheet

Transparency 52%

Label label spacing 3-4mm ± 0.2mm

Paper label on the bottom and the bottom end of 2mm pitch

5.2, blanching printing settings

    (1) warm-up set: to be warm-up before printing, waiting for the temperature reaches the set value of printing work behind the executable, if the temperature is not enough, then the printing will not clear. General printing temperature can be set to about 210-230 ℃, labeling faster, the higher the required temperature.

    (2) pressure setting: the pressure is the pressure-driven form, the general standard used to adjust pressure 4kg/cm2, if high-speed driving can increase the pressure of continuous use.

    (3) marking the depth of the set: first, adjust the air pressure, if the pressure increased, the depth will deepen printing, printing will be black, thick, adjust the pressure if the value was also unable to clear a certain type, please check whether the print head temperature too low; if the temperature is normal, then adjust the cylinder stroke, stroke increased the printing to deepen, if printing so that printing result is not too clear, please shorten the trip.

    (4) ribbon setting: the ribbon adjustment block screws to relax, before and after adjustment to adjust the ribbon jump distance, jump forward from the increase.

    (5) temperature settings: printing machines for the constant temperature control PID control, directly on the digital thermostat on the heating temperature can be set. In general, slow print speeds, lower temperature, high printing speed, the temperature is relatively higher.

 

 

 

 

 
 
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