CN111599264B - Efficient die-cutting waste discharge process for adhesive labels - Google Patents
Efficient die-cutting waste discharge process for adhesive labels Download PDFInfo
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- CN111599264B CN111599264B CN202010524539.2A CN202010524539A CN111599264B CN 111599264 B CN111599264 B CN 111599264B CN 202010524539 A CN202010524539 A CN 202010524539A CN 111599264 B CN111599264 B CN 111599264B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0222—Features for removal or adhesion, e.g. tabs
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0264—Shapes or borders
- G09F2003/0267—Shapes or borders die cut
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Abstract
The invention discloses a high-efficiency die-cutting waste discharge process for self-adhesive labels, which comprises the steps of calculating the optimal effective stripping angle of a separating roller and self-adhesive base paper in the horizontal direction according to the specification of the self-adhesive label product to be printed, so that a waste discharge edge has the shortest effective stripping width under the optimal stripping angle; adjusting die-cutting waste discharge equipment, enabling an included angle between the separation roller and the adhesive sticker base paper in the horizontal direction to be an optimal included angle, and arranging, producing and printing according to the specification of the adhesive sticker label product; using a cutter die with the layout specification according to the production arrangement of the self-adhesive label products, and continuously pressing and cutting the self-adhesive surface layer paper according to the production specification of the label products in a rolling cutting mode at a die cutting station; and the like. The advantages are that: under the prerequisite that does not change row's slitter edge width, effective width when changing and peeling off to reduce the biggest pulling force that row's waste material bore, make the pulling force fluctuation that row's waste material bore more even, improve the production speed and the efficiency of cross cutting waste discharge technology by a wide margin, practice thrift product cost.
Description
Technical Field
The invention relates to the technical field of adhesive sticker label production, in particular to a high-efficiency adhesive sticker label die-cutting waste discharge process.
Background
Along with the rapid development of e-commerce business, the express logistics business volume is increased greatly, so the use amount of express logistics documents is increased.
At present, express delivery commodity circulation document uses non-setting adhesive heat-sensitive label in a large number, and the label is two-layer paper structure, and the surface course is for printing the information carrier, and the bottom is the glassine base paper of keeping apart the non-setting adhesive to future adaptation printer prints, and surface course paper can all have 3 mm's interval between two piece continuous upper and lower labels. Meanwhile, in order to facilitate the bottom layer to be easily uncovered and stuck on an object by a person in use, the paper of the label surface layer is respectively reduced by 1-2mm in the left and right width compared with the paper of the label bottom layer, so that the person can conveniently separate and uncover the surface layer and the bottom layer, as shown in figure 1.
In order to meet the requirements of the equipment and personnel on use, unnecessary parts of the label surface paper are cut and separated and removed in the production process through a die cutting and waste discharge process.
However, in the existing die-cutting waste discharge process for producing self-adhesive labels, as the express logistics labels are all rectangular, in order to improve efficiency, the self-adhesive labels are usually produced after being orderly arranged in a matrix manner in the width of base paper.
In this form, the tension of the waste discharge material is not constant, and the tension of the waste discharge material is equal to the curling tension of the terminal curling mechanism of the waste discharge mechanism and the separating force generated by the adhesive force of the adhesive sticker directly adhering the surface layer and the bottom layer when the terminal waste discharge material is separated from the bottom paper.
All active or passive rollers with various functions on all continuous paper printing equipment are parallel to the paper surface, so that the synchronous and uniform stress of the paper during printing and processing is ensured, the uniform printing and coloring of the paper surface are ensured, and the paper feeding is stable. The same is true of the printing process, and the same is true of the die-cutting waste discharge process. Thus, when the waste is discharged at a constant speed in synchronism with the printing press: F-la-F-tack, and F-tack-k-peel strength x width; assuming that the row slitter width is a and the label width is b, as shown in fig. 2, when at positions 1 and 3, F is equal to k peel strength x (a + a + a + a); when in position 2, F is drawn to k peel strength x (a + a + a + b + b + b). In actual production, the length of the waste material discharged at the position 2 is very short, generally only 3mm, so that in actual high-speed production, the time at the position 2 is very short, so that the tension variation is in a pulse-like fluctuation in the pulsation, and the faster the production speed, the faster the frequency of the tension pulsation.
Secondly, manufacturers generally set the width of the waste edge to be about 2-3mm for cost control, and the width of the label product to be 75-100mm, which results in a very large variation of the F-draw at positions 1 and 2, and generally 10 times more F-draw at position 2 than at position 1.
In conclusion, under the existing die-cutting waste discharge process for producing self-adhesive labels, due to the fact that F-drawing values greatly jump due to the fact that the positions of waste discharge edges are different, the jumping frequency is faster and faster along with the increase of the speed of a production machine, and finally the waste discharge edges in rows cannot bear the tensile force and stretch off, so that machine halt is caused.
Because the waste material after the die cutting is wasted can not be recycled, and the waste material belongs to the waste cost, a manufacturer can compress the die cutting waste material to the required minimum specification as much as possible in the production process, and a common manufacturer can compress the longitudinal waste edge discharge to about 3mm, but the width of the waste edge discharge is reduced, and simultaneously, a problem is brought, along with the reduction of the width of the waste edge discharge, the bearable pulling force is also reduced, so that the breaking probability is greatly increased. In particular, the faster the production speed, the greater the tensile forces to which the waste is subjected, the more pronounced this problem is. In the printing and die cutting process, the production machine speed of more than 200 m/min can be realized for a long time, but the waste discharge efficiency is not always improved, so that the production capacity of the existing label printing die cutting machine can only reach about 100 m/min generally, and in the actual production, the production machine speed can reach 80-90 m/min due to paper materials and the like, so that the production machine speed is very high.
Meanwhile, due to the high-speed development of the express logistics industry, the express quantity reaches 600 hundred million in 2019 years, and the scale of the express logistics label is increased by more than 100 hundred million every year, so that the demand of express logistics labels is huge, how to improve the production capacity of express logistics label production equipment is the priority of various manufacturers, the width of processed paper is continuously improved, the pulling force of waste discharge is increased, and the speed of a waste discharge process becomes a bottleneck which restricts the large-scale production efficiency.
Disclosure of Invention
The invention aims to provide a high-efficiency die-cutting waste discharge process for self-adhesive labels, so as to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a high-efficiency die-cutting waste discharge process for self-adhesive labels comprises the following steps,
s1, calculating the optimal effective stripping angle of the separating roller and the adhesive sticker base paper in the horizontal direction according to the specification of the adhesive sticker label product to be printed, so that the waste discharge edge has the shortest effective stripping width under the optimal stripping angle;
s2, adjusting die cutting waste discharge equipment, enabling an included angle between the separating roller and the adhesive sticker base paper in the horizontal direction to be an optimal included angle, and arranging, producing and printing according to the specification of the adhesive sticker label product;
s3, using a cutter die according to the production arrangement layout specification of the self-adhesive label products, and using a rolling cutting mode at a die cutting station to continuously press and cut the self-adhesive surface layer paper according to the production specification of the label products;
s4, separating the waste part of the self-adhesive surface layer paper after die cutting when the self-adhesive surface layer paper passes through the separation roller, and only leaving the required part of the self-adhesive label product on the self-adhesive base paper;
and S5, continuously pulling and collecting the separated die cutting waste materials through a driving roller of the waste discharging mechanism.
Preferably, when the tangent value of an included angle between the separating roller and the adhesive base paper in the horizontal direction is equal to the ratio of the waste discharge space between the upper label and the lower label to the waste discharge space between the edge of the adhesive base paper and the nearest label, the included angle is the optimal effective stripping angle,
wherein A is an included angle between the separation roller and the adhesive sticker base paper in the horizontal direction; d is the lateral spacing between adjacent labels; a is the width of the waste edge;
and the condition to be satisfied by the included angle a is,
wherein, L is the width of the adhesive sticker base paper.
Preferably, the value range of the optimal effective stripping angle is 5-15 degrees.
Preferably, the production specification of the self-adhesive label product is 133mm long along the paper feeding direction and 78mm wide left and right, the final size of the self-adhesive label product is 130mm along the paper feeding direction, and the left and right width of the self-adhesive label product is 76 mm; the size of the waste discharge edge between the labels in production is 3mm along the paper feeding direction, and the middle of the waste discharge edge is 3mm in transverse width.
Preferably, the speed of the waste edge discharge and the speed of the separation from the self-adhesive base paper by the separation roller are kept synchronous and consistent with the production running speed of the self-adhesive base paper.
Preferably, all the rollers in the waste discharge mechanism are kept parallel to the separation roller in the horizontal direction.
The invention has the beneficial effects that: according to the invention, by changing the angle of the waste discharge separating roller, the effective width during stripping is changed on the premise of not changing the width of the waste discharge edge, so that the maximum tension borne by the waste discharge is reduced, the tension borne by the waste discharge is more uniform, all rollers of the waste discharge mechanism are kept horizontally parallel to the separating roller, the left and right stresses of the waste discharge are ensured to be uniform, the borne tension is uniformly distributed on the whole waste discharge edge, the reduction of the maximum tension and the more uniform fluctuation can ensure that the possibility of the waste discharge being broken is lower, and the production speed and the efficiency of the die cutting waste discharge process are greatly improved. And can further reduce the width of the waste discharge on the original basis, and save the product cost.
Drawings
FIG. 1 is a schematic diagram of a conventional express logistics receipt;
FIG. 2 is a schematic diagram of the slitter edge tension at different positions of a prior art label product during the production process;
FIG. 3 is a schematic flow diagram of a die-cutting waste disposal process in an embodiment of the present invention;
FIG. 4 is a schematic diagram of different included angles between the separation roller and the sticker base paper in the embodiment of the invention;
FIG. 5 is a graph showing the comparison of the drawing force of the waste edge at different angles in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 3, the embodiment provides a high-efficiency waste discharge process for die cutting of self-adhesive labels, which comprises the following steps,
s1, determining the optimal included angle between the separation roller and the self-adhesive base paper in the horizontal direction according to the specification of the self-adhesive label product to be printed and the shortest effective stripping width between the self-adhesive label product and the self-adhesive base paper during stripping;
s2, adjusting die cutting waste discharge equipment, enabling an included angle between the separating roller and the adhesive sticker base paper in the horizontal direction to be an optimal included angle, and arranging, producing and printing according to the specification of the adhesive sticker label product;
s3, using a cutter die according to the production arrangement layout specification of the self-adhesive label products, and using a rolling cutting mode at a die cutting station to continuously press and cut the self-adhesive surface layer paper according to the production specification of the label products;
s4, separating the waste part of the self-adhesive surface layer paper after die cutting when the self-adhesive surface layer paper passes through the separation roller, and only leaving the required part of the self-adhesive label product on the self-adhesive base paper;
and S5, continuously pulling and collecting the separated die cutting waste materials through a driving roller of the waste discharging mechanism.
In this embodiment, the speed of the waste edge discharge and the speed of the separation from the self-adhesive base paper by the separation roller are kept synchronous and consistent with the production running speed of the self-adhesive base paper.
In this embodiment, all the rollers in the waste discharge mechanism are kept parallel to the separation roller in the horizontal direction.
In this embodiment, the specification of the self-adhesive label product is rectangle to align the self-adhesive label product according to the top and bottom margin, and the self-adhesive label product is left and right gapless matrix mode, and the printing die cutting is carried out in order.
In this embodiment, the final parameters of the pulling force F due to the waste discharge are the peel strength k and the peel width L. Where the peel strength k is related to the tackiness of the glue and the adhesion of the paper raw material, all assumed to be constant. Then changing the tension F only changes the peel width L. Therefore, in the process, the separating roller is not perpendicular to the paper surface of the self-adhesive base paper any more, but deviates by an angle from left to right. The stripping width L can be changed under the condition of not changing the specification of the self-adhesive label product, the stripping width L is reduced as much as possible, the tensile force F is reduced, and the waste discharge edge is prevented from being broken by tension.
In this embodiment, referring to FIG. 4, at position 1, the effective peeling width L of position 11Equal to the width L of the paper surface of the adhesive sticker base paper; that is, when the included angle between the adhesive sticker base paper and the separating roller in the horizontal direction is 0,
MaxL1=4a+3b;
at position 2, it can be obtained according to the cosine theorem of the triangle (when the angle α at position 2 needs to make L tan α larger than the interval d between two upper and lower rows of labels, L2Is less than L1The minimum angle is determined according to the width of the non-setting adhesive base paper and the interval d) when the included angle between the non-setting adhesive base paper and the separating roller in the horizontal direction is alpha, the effective stripping width L of the position 2 is2Is composed of
MaxL2=(4a+3b)/cosα-b/cosα=(4a+2b)/cosα;
At the position 3, namely when the included angle between the non-setting adhesive base paper and the separating roller in the horizontal direction is beta, the effective stripping width L of the position 3 can be obtained according to the cosine law of triangles3Is composed of
MaxL3=(4a+3b)/cosβ-b/cosβ-b/cosβ-b/cosβ=4a/cosβ;
Wherein a is the width of the waste edge; b is the label width; alpha is more than 0 and less than beta;
according to the above analysis, since 1 > cos β > cos α, MaxF3<MaxF2<MaxF1Wherein F is1、F2And F3The tension experienced by the reject at position 1, position 2 and position 3 respectively.
According to the trigonometric function, when the width of the whole paper is constant, the total length of the hypotenuse of the right triangle is increased as the angle is increased, so the optimal effective peeling angle calculation method is as follows: the tangent of the optimum effective peel angle is exactly equal to the ratio of the reject spacing between the upper and lower labels to the reject spacing between the edge of the paper and the nearest label, i.e. the ratio
Wherein A is an included angle between the separation roller and the adhesive sticker base paper in the horizontal direction; d is the lateral spacing between adjacent labels; and a is the width of the waste edge.
At this optimum effective peel angle, the effective peel width is at a minimum. That is, at the best effective peeling angle, the tension borne by the waste discharge material is the minimum under the condition of not changing the specification of the self-adhesive label product, the waste discharge edge cannot be broken by tension, the waste discharge edge can be effectively separated from the self-adhesive base paper, and the separation efficiency is the highest.
That is to say, after the angular position of the waste discharge separating roller is deviated by an angle, the effective stripping width is changed, and the tensile force borne by the waste discharge material is changed, so that the waste discharge edge can be effectively separated from the non-setting adhesive base paper and cannot be broken, and the separation efficiency between the waste discharge edge and the non-setting adhesive base paper is improved. The optimum effective peeling angle A satisfies the condition
Example two
In this embodiment, the effectiveness of the present invention is illustrated by the most common existing production of express logistics labels.
1. The width b of the label is 75mm, when 1 label is arranged in the transverse direction, the distance a between the paper edge and the label is 2mm, the distance d between the upper label and the lower label is 3mm, and the width L of the self-adhesive base paper is 79 mm. Then d/L3/79-0.038 and d/a 3/2-1.5, so 0.038 < tan a < 1.5, 2.2 < a < 56, i.e. the optimum effective peel angle is between 2.2 and 56 degrees.
2. When 4 labels are arranged in the transverse direction, the distance a between the paper edge and the label is 3mm, the distance d between the upper label and the lower label is 3mm, and the width L of the base paper is 415 mm. Then d/L3/415 and d/a 3/3 are equal to 1, so 0.0072 < tanA < 1, then 0.4 < a < 45, i.e. the optimum effective peel angle is between 0.4 and 45 degrees.
The tensile force detection data was discarded on the tensile tester at 3 positions (position 1 is horizontal, position 2 is at 5 degrees, and position 3 is at 10 degrees) of the test sample using the same product specification (130mm 76 mm/2 mm left-right spacing/3 mm lateral spacing/360 mm total width). As shown in fig. 5, the color of the curve sequentially represents the measured data of the waste pulling force at the position 1, the position 2 and the position 3 from dark to light. It can be seen that the actual detection result coincides with the previous inference.
By changing the separation angle between the waste discharge material and the non-setting adhesive base paper, the effective width during stripping is changed under the condition that the width of the waste discharge edge is not changed, so that the maximum tensile force borne by the waste discharge material is reduced, and the variation fluctuation of the tensile force borne by the waste discharge material is more uniform, as shown in fig. 5.
Therefore, in actual production, the selection of the optimal effective peeling angle is adjusted according to the specific conditions of actually produced products, the optimal effective peeling angles are different due to different base paper widths, different sizes and specifications of the products and different typesetting, the angle is difficult to adjust randomly from the specific equipment, and all the selected ranges are generally set to be 5-15 degrees to adjust and reform the equipment and fix the equipment so as to adapt to most of specification labels.
In this embodiment, taking the production specification of the adhesive sticker product commonly used in express logistics at present as an example, the size along the paper feeding direction is 133mm, the left width and the right width are 78mm, the final size of the product is 130mm along the paper feeding direction, and the left width and the right width are 76 mm. Therefore, the waste edge in the middle of the product and the product in the production is 3mm in the paper feeding direction, and the middle of the waste edge is 3mm in the transverse direction. Generally, 5-6 adhesive sticker products are produced in the transverse direction of base paper side by side; by adopting the process flow, the produced express logistics label has no difference with the adhesive sticker label produced by the production process in the prior art, and no specification parameter is changed. Because the pulling force required by waste discharge is reduced and the fluctuation change of the pulling force is more uniform, the production speed of the waste discharge process of the self-adhesive label can be greatly improved, and the waste discharge process is the bottleneck of the production speed of the whole printing equipment for the self-adhesive label. According to the experimental result, in the production of the adhesive label with the specification of 130 x 76mm for the existing express logistics label, after the waste discharge separating roller deviates by 10 degrees, the maximum tensile force of 50% of waste discharge materials can be effectively reduced, and the machine speed of the whole label printing machine is increased to 120 m/min from the maximum 90 m/min. The production efficiency is improved by 30 percent, and the space for continuously improving is provided.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention provides a high-efficiency non-setting adhesive label die-cutting waste discharge process, which changes the effective width during stripping by utilizing the change of the angle of a waste discharge separating roller on the premise of not changing the width of a waste discharge edge, thereby reducing the maximum tensile force borne by waste discharge, enabling the tensile force borne by the waste discharge to be more uniform, keeping all rollers of a waste discharge mechanism horizontally parallel to the separating roller, ensuring that the left and right forces borne by the waste discharge mechanism are uniform, distributing the borne tensile force to the whole waste discharge edge uniformly, ensuring that the possibility of the waste discharge being broken is lower due to the reduction of the maximum tensile force and the more uniform fluctuation, and greatly improving the production speed and the efficiency of the die-cutting waste discharge process. And can further reduce the width of the waste discharge on the original basis, and save the product cost.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (5)
1. The utility model provides a high-efficient non-setting adhesive label cross cutting waste discharge technology which characterized in that: the process comprises the following steps of,
s1, calculating the optimal effective stripping angle of the separating roller and the adhesive sticker base paper in the horizontal direction according to the specification of the adhesive sticker label product to be printed, so that the waste discharge edge has the shortest effective stripping width under the optimal effective stripping angle;
s2, adjusting die cutting waste discharge equipment, enabling an included angle between the separating roller and the adhesive sticker base paper in the horizontal direction to be an optimal included angle, and arranging, producing and printing according to the specification of the adhesive sticker label product;
s3, using a cutter die according to the production arrangement layout specification of the self-adhesive label products, and using a rolling cutting mode at a die cutting station to continuously press and cut the self-adhesive surface layer paper according to the production specification of the label products;
s4, separating the waste part of the self-adhesive surface layer paper after die cutting when the self-adhesive surface layer paper passes through the separation roller, and only leaving the required part of the self-adhesive label product on the self-adhesive base paper;
s5, continuously pulling and collecting the separated die-cutting waste discharge materials through a driving roller of a waste discharge mechanism;
when the tangent value of the included angle between the separating roller and the self-adhesive base paper in the horizontal direction is equal to the ratio of the waste discharge space between the upper label and the lower label to the waste discharge space between the edge of the self-adhesive base paper and the nearest label, the included angle is the optimal effective stripping angle,
wherein A is an included angle between the separation roller and the adhesive sticker base paper in the horizontal direction; d is the lateral spacing between adjacent labels; a is the width of the waste edge;
and the condition to be satisfied by the included angle a is,
wherein, L is the width of the adhesive sticker base paper.
2. The efficient self-adhesive label die-cutting waste discharge process of claim 1, which is characterized in that: the value range of the optimal effective stripping angle is 5-15 degrees.
3. The efficient self-adhesive label die-cutting waste discharge process of claim 1, which is characterized in that: the production specification of the self-adhesive label product is 133mm long along the paper feeding direction and 78mm wide left and right, the final size of the self-adhesive label product is 130mm along the paper feeding direction, and the left and right width of the self-adhesive label product is 76 mm; the size of the waste discharge edge between the labels in production is 3mm along the paper feeding direction, and the middle of the waste discharge edge is 3mm in transverse width.
4. The efficient self-adhesive label die-cutting waste discharge process of claim 2, which is characterized in that: the speed of the waste edge discharge and the speed of the separation of the waste edge discharge from the self-adhesive base paper by the separation roller are kept synchronous and consistent with the production running speed of the self-adhesive base paper.
5. The efficient self-adhesive label die-cutting waste discharge process of claim 3, which is characterized in that: all the rollers in the waste discharge mechanism are kept parallel to the separation roller in the horizontal direction.
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