CN110626032B - In-mold labeling with colorful effect and production equipment thereof - Google Patents
In-mold labeling with colorful effect and production equipment thereof Download PDFInfo
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- CN110626032B CN110626032B CN201910849383.2A CN201910849383A CN110626032B CN 110626032 B CN110626032 B CN 110626032B CN 201910849383 A CN201910849383 A CN 201910849383A CN 110626032 B CN110626032 B CN 110626032B
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- 230000000694 effects Effects 0.000 title claims abstract description 25
- 238000002372 labelling Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000003292 glue Substances 0.000 claims description 88
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 57
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 57
- 238000005507 spraying Methods 0.000 claims description 45
- 238000004804 winding Methods 0.000 claims description 45
- 238000010438 heat treatment Methods 0.000 claims description 42
- 230000007246 mechanism Effects 0.000 claims description 30
- 239000000443 aerosol Substances 0.000 claims description 27
- 238000004513 sizing Methods 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 20
- 238000009423 ventilation Methods 0.000 claims description 16
- 238000010030 laminating Methods 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 10
- 230000000007 visual effect Effects 0.000 abstract description 5
- 239000003086 colorant Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 67
- 238000007639 printing Methods 0.000 description 27
- 239000011241 protective layer Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 16
- 239000007921 spray Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000001795 light effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1284—Application of adhesive
-
- 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
-
- 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
- G09F2003/023—Adhesive
- G09F2003/0232—Resistance to heat
-
- 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
- G09F2003/0257—Multilayer
-
- 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
- G09F2003/0272—Labels for containers
- G09F2003/0273—Labels for bottles, flasks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses an in-mold labeling with a colorful effect and production equipment thereof. The invention has the following beneficial effects: the in-mold label has rich colors, and can bring excellent visual effects to the bottle body or the injection molding piece when in-mold labeling.
Description
Technical Field
The invention relates to the field of plastic blow molding products, in particular to an in-mold labeling with a colorful effect and production equipment thereof.
Background
The injection molding in-mold labeling technology is to print specific patterns on OPP material and then compound a layer of PP film, namely, before blow molding and injection molding, the printed in-mold label is put into a blow molding or injection molding mold, and the in-mold label and the surface of a bottle body or an injection molding part are melted into a whole through the actions of high temperature and high pressure in the mold to form a finished packaging container. The container with in-mold labeling is characterized in that the label and the bottle body are on the same surface, and the color image and text of the label are perceived as being directly printed on the surface of the bottle body.
However, the color of the existing in-mold label is not so rich that it cannot give excellent visual effects to customers when applied to bottles for packaging, and thus needs to be improved.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the in-mold labeling with the seven-color effect and the production equipment thereof, and the in-mold labeling has rich colors and can bring excellent visual effects to the bottle body or the injection molding piece when in-mold labeling.
The technical aim of the invention is realized by the following technical scheme: the utility model provides an in-mold labeling with seven various effects and production facility thereof, includes transparent protective layer, printing layer, seven various rete and the laminating layer of mutual bonding in proper order, the one side that seven various rete were kept away from to the laminating layer cooperatees with the surface of bottle/injection molding.
The invention is further provided with: the printing layer is made by printing a pattern or text on the transparent protective layer.
The invention is further provided with: the transparent protective layer is made of a material with good printing effect and high transparency.
The invention is further provided with: the transparent protective layer is made of BOPP.
The invention is further provided with: the printing layer can be a film with pattern display, and particularly can be printed with patterns or hollowed-out patterns.
The invention is further provided with: a first glue layer is arranged between one side of the transparent protective layer with the printing layer and the colorful film layer, and a second glue layer is arranged between the colorful film layer and the attaching layer.
The invention is further provided with: the material of the laminating layer is OPP.
The invention is further provided with: the first glue layer and the second glue layer are made of high-temperature-resistant glue.
The production equipment with the seven-color effect for in-mold labeling comprises an unreeling device, a shrinkage ratio adjusting device, a sizing and laminating device, a reeling device, a PLC (programmable logic controller) control assembly, a touch display screen and a frequency converter, wherein the unreeling device comprises a BOPP film unreeling mechanism, a seven-color film unreeling mechanism and an OPP film unreeling mechanism, and the seven-color film unreeling mechanism is positioned between the BOPP film unreeling mechanism and the OPP film unreeling mechanism;
the BOPP film unreeling mechanism, the seven-color film unreeling mechanism and the OPP film unreeling mechanism comprise an unreeling roller, a driven roller and an unreeling tension adjusting roller, one side of the unreeling roller is electrically connected with an unreeling variable frequency motor, one side of the unreeling tension adjusting roller is electrically connected with an unreeling tension detection device, and the output end of the unreeling tension detection device is connected with an unreeling variable frequency device for controlling the rotating speed of the unreeling variable frequency motor;
The winding device comprises a winding roller, a traction roller, a driven roller and a winding tension adjusting roller, wherein one side of the winding roller is electrically connected with a winding variable frequency motor, one side of the winding tension adjusting roller is electrically connected with a winding tension detection device, and the output end of the winding tension detection device is connected with a winding variable frequency device for controlling the rotating speed of the winding variable frequency motor.
The invention is further provided with: the shrinkage ratio adjusting device comprises a shell, and a BOPP film shrinkage ratio adjusting piece, a seven-color film shrinkage ratio adjusting piece and an OPP film shrinkage ratio adjusting piece which are positioned in the shell, wherein the seven-color film shrinkage ratio adjusting piece is positioned between the BOPP film shrinkage ratio adjusting piece and the OPP film shrinkage ratio adjusting piece;
the BOPP film shrinkage ratio adjusting piece, the seven-color film shrinkage ratio adjusting piece and the OPP film shrinkage ratio adjusting piece comprise five heating rollers, the rotating speeds of the five heating rollers are gradually decreased, each heating roller is internally provided with an electric heating pipe capable of heating the heating roller, one side of each heating roller is connected with a variable frequency motor for driving the heating roller to rotate, each variable frequency motor is connected with a frequency converter for controlling the rotating speed of the variable frequency motor, and the PLC control assembly is respectively connected with the touch display screen and each frequency converter.
The invention is further provided with: the sizing and laminating device comprises a sizing piece and a laminating piece, wherein the sizing piece comprises a sizing roller and a lower rubber roller which are matched with each other, a gap for a colorful film to pass through is formed between the sizing roller and the lower rubber roller, the gap is larger than the thickness of the colorful film to pass through, one side of the sizing roller, which is far away from the lower rubber roller, is matched with the BOPP film, and one side of the lower rubber roller, which is far away from the sizing roller, is matched with the OPP film;
The glue spraying device comprises a glue spraying piece, a glue spraying piece and a glue spraying piece, wherein the glue spraying piece is used for spraying glue on two sides of a colorful film, the glue spraying piece and the glue spraying piece are respectively provided with a glue spraying nozzle, the glue spraying air flow sprayed by the glue spraying nozzle in the first glue spraying piece passes through a region between a glue spraying roller and the colorful film, the glue spraying air flow sprayed by the glue spraying nozzle in the second glue spraying piece passes through a region between a lower glue spraying roller and the colorful film, each glue spraying nozzle is internally provided with a temperature control device for controlling the temperature of the glue spraying air flow and the temperature of the colorful film to be consistent, the inside of the glue spraying roller and the inside of the lower glue spraying roller are respectively provided with a ventilation cavity, the surface of the glue spraying roller is provided with ventilation holes communicated with the ventilation cavities, the ventilation holes are three and are distributed at equal intervals, and the ventilation cavities are communicated with an air exhaust device;
The pressing piece comprises an upper pressing roller and a lower pressing roller which are matched with each other, a gap which can enable the BOPP film, the colorful film and the OPP film to pass through simultaneously is arranged between the upper pressing roller and the lower pressing roller, and the size of the gap is smaller than the thickness of the BOPP film, the colorful film and the OPP film which are added together.
In summary, the invention has the following beneficial effects: the printing layer is clamped between the transparent protective layer and the colorful film layer, so that the printing layer is not contacted with a real object or a person, and further the color fading of the printing layer in the long-term use process is avoided under the protection effect of the transparent protective layer. Meanwhile, the colorful film layer is also called as an 'iris', is a multi-layer film, and has the effects of multi-angle layer type color change among layers like sky rainbow after light sequentially passes through the transparent protective layer and the printing layer to the colorful film layer under the irradiation of light by fully utilizing the light interference principle. The color iris has the effect that the color iris base materials with different distances and different angles can show completely different fantasy color effects due to the rich light effects.
Based on the combination of the color film and the printing layer, the fantasy color effect generated by the color film under the irradiation of light is combined with the patterns on the printing layer, so that the patterns on the printing layer also have rich colors, and further, the bottle body or the injection molding piece can be provided with excellent visual effect.
Also specifically described is: if the bottle body is made of transparent materials, the color of the solution (such as beverage) filled in the bottle body is various, the color of the solution reacted to the colorful film layer under the action of light can also change, so that the colorful effect is influenced by the color of the solution in the bottle body, and the color change is various. The colorful film layer of the application has various names, and can be a colorful film, a fantasy film, a laser color film and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of an in-mold labeling structure according to the present invention;
FIG. 2 is a control schematic diagram of the production apparatus for producing in-mold labeling according to the present invention;
FIG. 3 is a simplified control schematic of a PLC control assembly;
Fig. 4 is a schematic structural view of the upper rubber roll, the lower rubber roll, the colorful film layer and the aerosol glue spraying piece.
Reference numerals: 1. a transparent protective layer; 2. printing a layer; 3. a colorful film layer; 4. a bonding layer; 5. a first glue layer; 6. a second glue layer; 7. an unreeling device; 8. a shrinkage ratio adjusting device; 9. a sizing and pressing device; 10. a winding device; 11. a PLC control assembly; 12. touching the display screen; 13. BOPP film unreeling mechanism; 14. seven color film unreeling mechanism; 15. OPP film unreeling mechanism; 16. an unreeling roller; 17. driven roller; 18. unreeling tension adjusting rollers; 19. unreeling a variable frequency motor; 20. unreeling tension detection device; 21. unreeling the frequency converter; 22. a wind-up roll; 23. a traction roller; 24. a passive roller; 25. a winding tension adjusting roller; 26. winding a variable frequency motor; 27. a winding tension detection device; 28. winding a frequency converter; 29. a housing; 30. BOPP film shrink ratio adjustment; 31. a seven-color film shrinkage ratio adjusting piece; 32. an OPP film shrink ratio adjuster; 33-37, heating roller; 38. a lower press roll; 39. a glue applying piece; 40. pressing the piece; 41. a glue applying roller; 42. a lower rubber roll; 43. a first aerosol spray member; 44. the second aerosol glue spraying piece; 45. an aerosol glue spray nozzle; 46. a ventilation cavity; 47. a vent hole; 48. and (5) an upper press roller.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
Embodiment one:
As shown in FIG. 1, the in-mold labeling with the colorful effect comprises a transparent protective layer 1, a printing layer 2, a colorful film layer 3 and a bonding layer 4 which are sequentially bonded with each other, wherein one side of the bonding layer 4 is bonded with the outer surface of a bottle body or an injection molding piece at a high temperature.
The specific description is as follows: the printing layer 2 is clamped between the transparent protective layer 1 and the colorful film layer 3, so that the printing layer 2 is not contacted with a real object or a person, and further the color fading of the printing layer 2 in the long-term use process is avoided under the protection effect of the transparent protective layer 1. Meanwhile, the colorful film layer 3 is also called as a 'color iris', is a multi-layer film, and has the effect of sky rainbow like multi-angle layer color change among layers after light sequentially passes through the transparent protective layer 1, the printing layer 2 and the colorful film layer 3 under the irradiation of light by fully utilizing the light interference principle. The color iris has the effect that the color iris base materials with different distances and different angles can show completely different fantasy color effects due to the rich light effects.
Based on the combination of the color film and the printing layer 2, the fantasy color effect generated by the color film under the irradiation of light is combined with the patterns on the printing layer 2, so that the patterns on the printing layer 2 also have rich colors, and further, the bottle body or the injection molding piece can be provided with excellent visual effect.
Also specifically described is: if the bottle body is made of transparent materials, the color of the solution (such as beverage) filled in the bottle body is various, the color of the solution reacted to the colorful film layer 3 under the action of light can also change, so that the colorful effect is influenced by the color of the solution in the bottle body, and the color change is various.
Further, the printing layer 2 is formed by printing a specific pattern or character on the transparent protective layer 1.
Further, the transparent protective layer 1 is made of a material with good printing effect and high transparency. The material is preferably BOPP.
Further, the printing layer 2 may be a film with a pattern display, and specifically, a pattern or a hollowed-out pattern may be printed on the film.
Further, a first glue layer 5 is arranged between the side of the transparent protective layer 1 with the printing layer 2 and the colorful film layer 3. A second glue layer 6 is arranged between the colorful film layer 3 and the attaching layer 4.
Further, the material of the bonding layer 4 is preferably OPP.
Further, the first glue layer 5 and the second glue layer 6 are preferably made of high temperature resistant glue, and the standard of high temperature resistance is preferably that the high temperature resistance can resist the high temperature of more than 100 ℃.
Embodiment two:
As shown in fig. 2-4, the production equipment for in-mold labeling with seven-color effect comprises an unreeling device 7, a shrinkage ratio adjusting device 8, a sizing and pressing device 9, a reeling device 10, a PLC control component 11, a touch display screen 12 and a frequency converter. The unreeling device 7 comprises a BOPP film unreeling mechanism 13, a seven-color film unreeling mechanism 14 and an OPP film unreeling mechanism 15, wherein the seven-color film unreeling mechanism 14 is positioned between the BOPP film unreeling mechanism 13 and the OPP film unreeling mechanism 15.
The BOPP film unreeling mechanism 13, the seven-color film unreeling mechanism 14 and the OPP film unreeling mechanism 15 comprise unreeling rollers 16, driven rollers 17 and unreeling tension adjusting rollers 18. One side of the unreeling roller 16 is electrically connected with an unreeling variable frequency motor 19, one side of the unreeling tension adjusting roller 18 is electrically connected with an unreeling tension detecting device 20, and an output end of the unreeling tension detecting device 20 is connected with an unreeling variable frequency motor 21 for controlling the rotating speed of the unreeling variable frequency motor 19.
The winding device 10 comprises a winding roller 22, a traction roller 23, a driven roller 24 and a winding tension adjusting roller 25. One side of the winding roller 22 is electrically connected with a winding variable frequency motor 26, one side of the winding tension adjusting roller 25 is electrically connected with a winding tension detecting device 27, and the output end of the winding tension detecting device 27 is connected with a winding variable frequency device 28 for controlling the rotating speed of the winding variable frequency motor 26.
The shrink ratio adjusting device 8 comprises a housing 29, a BOPP film shrink ratio adjusting member 30, a seven-color film shrink ratio adjusting member 31, and an OPP film shrink ratio adjusting member 32, wherein the seven-color film shrink ratio adjusting member 31 is located between the BOPP film shrink ratio adjusting member 30 and the OPP film shrink ratio adjusting member 32.
The BOPP film shrink ratio adjuster 30, the seven-color film shrink ratio adjuster 31, and the OPP film shrink ratio adjuster 32 each include heating rollers 33, 34, 35, 36, and 37. Each heating roller is internally provided with an electric heating pipe which can heat the heating roller, one side of each heating roller is connected with a variable frequency motor which drives the heating roller to rotate, and each variable frequency motor is connected with a frequency converter which controls the rotating speed of the variable frequency motor.
The PLC control assembly 11 is respectively connected with the touch display screen 12, a frequency converter (comprising an unreeling frequency converter 21, a reeling frequency converter 28 and a frequency converter for controlling the rotation of the heating roller). The touch display screen 12 is used as an input end, a control signal is transmitted to the PLC control component 11, and the control signal is analyzed and processed by the PLC control component 11 and then transmitted to each frequency converter to control the motor so as to realize speed regulation. In the application, the unreeling device 7 forms a closed-loop control system through an unreeling variable frequency motor 19, an unreeling variable frequency device 21, an unreeling tension adjusting roller 18 and an unreeling tension detecting device 20 to realize active unreeling with constant tension and constant linear speed; and the winding device 10 adopts the same principle as the unwinding device 7 to realize the active winding with constant tension and constant linear speed.
Because the in-mold labeling is formed by compounding multiple layers, the shrinkage rate of each layer of material is different because the materials adopted by each layer are different, so that the prepared in-mold labeling has the problems of wrinkling, curling and the like. The external aesthetics of the product can be affected by the in-mold labeling of the crimped, curled exterior surface of the bottle/injection molded article. Thus, when in-mold labeling of wrinkles and curls produced in actual production, they are often used as waste products and are not distributed in the market. But at the same time, the production cost of enterprises is increased, and the economic benefit of the enterprises is reduced.
Because the shrinkage rates of the BOPP film, the colorful film and the OPP film which enter the shrinkage ratio adjusting device 8 are inconsistent at different temperatures, the shrinkage ratios of the BOPP film, the colorful film and the OPP film which enter the shrinkage ratio adjusting device 8 are respectively adjusted through the BOPP film shrinkage ratio adjusting piece 30, the colorful film shrinkage ratio adjusting piece 31 and the OPP film shrinkage ratio adjusting piece 32, so that the shrinkage ratios of the BOPP film, the colorful film and the OPP film which come out of the shrinkage ratio adjusting device 8 are consistent, and then the BOPP film, the colorful film and the OPP film are compounded into a specific colorful-effect in-mold label by the gluing and laminating device 9, and finally the film is rolled by the rolling device 10.
The shrink ratio adjustment principle of the BOPP film shrink ratio adjustment member 30, the seven-color film shrink ratio adjustment member 31, and the OPP film shrink ratio adjustment member 32 is as follows: this embodiment will be described by taking the BOPP film shrinkage ratio adjustment by the BOPP film shrinkage ratio adjuster 30 as an example. The adjustment principles of the seven-color film shrinkage ratio adjuster 31 and the OPP film shrinkage ratio adjuster 32 are the same as those of the BOPP film shrinkage ratio adjuster 30, and detailed description thereof is omitted.
The BOPP film shrink ratio adjuster 30 includes five heating rolls 33, 34, 35, 36, 37 having successively decreasing rotational speeds. The BOPP film continuously contracts after passing through the five heating rollers in sequence, and finally is taken out of the shell 29 under the drive of the winding device 10, and is wound. The temperature of each heating roller is independently controlled, and a temperature control system is formed by a temperature sensor, a temperature control meter, an electric heater tube and the like, so that the temperature of each heating roller is adjustable. This is prior art and will not be described in detail herein.
When the BOPP film passes through five heating rollers in turn, each heating roller is provided with a variable frequency motor and a frequency converter to control the rotating speed of the BOPP film. The rotational speed of the heated roll may be indicative of the amount of time the heated roll is in contact with the BOPP film. When the rotational speed of the heating roller becomes small, the time of contact with the heating roller becomes longer. The BOPP film is contacted at a certain temperature for different time, and the shrinkage is different. To achieve the adjustment of the predetermined shrinkage, it is necessary to determine the time t required for the BOPP film to pass through the five heating rolls, the temperature of the heating rolls, and the total length of the strokes through the five heating rolls to be S meters, and to set n% as the shrinkage.
The payout winding speed was v1= (1+n%) S/t, and the winding linear speed v2=v1 (1-n%) gave v2/v1=1-n%. The surface linear velocity of the heating roller 33 matches the unwinding line velocity, and the surface linear velocity of the heating roller 37 matches the winding line velocity.
If a BOPP film with low shrinkage is used, as disclosed in CN105829409B, the in-mold label of the present application is prepared. It is shown in this patent document that the shrinkage of BOPP is 3.0 to 6.0% at 120℃for 5 minutes. The median value of this value was taken in the test, i.e. n% was 4.5%. Thus, in the case where the time required for passing through the five heating rollers and the total length of travel of the five heating rollers are determined, the payout line speed V1 and the take-up line speed V2 can be calculated.
It is assumed that the shrinkage of the OPP film and the seven-color film are 10% each at their respective temperatures. The shrinkage of BOPP film needs to be adjusted to 10% to achieve the same shrinkage as OPP film, seven color film. Thus, the three mutually compounded films have the same shrinkage rate, so that the prepared in-mold label with the colorful effect has no folds and no curls.
Then, in the case where the BOPP film unwinding speed is known as V1, a value of n% of 10% is substituted into the winding linear speed v2=v1 (1-n%) equation, thereby obtaining the winding linear speed V2. The rotation speed of the five heating rolls in the BOPP film shrink ratio adjustor 30 is sequentially decreased. When the unwinding speed, i.e., the linear speed of the heating roller 33 is constant, the BOPP film is brought into contact with the five heating rollers for a longer time and the shrinkage thereof is increased by decreasing the winding linear speed, i.e., the linear speed of the heating roller 37. The shrinkage rate adjustment principle of the application for the OPP film and the colorful film is similar to the above. And will not be described in detail herein.
As shown in fig. 2 and 4, the gluing and pressing device 9 includes a gluing member 39 and a pressing member 40.
The glue applying piece 39 comprises a glue applying roller 41 and a glue applying roller 42 which are matched with each other, and a gap for the seven-color film to pass through is arranged between the glue applying roller 41 and the glue applying roller 42 and is larger than the thickness of the seven-color film so as to allow the seven-color film to pass through. The side of the upper rubber roll 41 away from the lower rubber roll 42 is matched with the BOPP film, and the side of the lower rubber roll 42 away from the upper rubber roll 41 is matched with the OPP film. The glue applying part 39 further includes a first aerosol glue spraying part 43 and a second aerosol glue spraying part 44 for spraying glue to two sides of the colorful film. The first aerosol spray piece 43 and the second aerosol spray piece 44 both comprise aerosol spray nozzles 45, the airflow containing the glue solution sprayed by the aerosol spray nozzles 45 in the first aerosol spray piece 43 passes through the area between the upper glue roller 41 and the colorful film, and the airflow containing the glue solution sprayed by the aerosol spray nozzles 45 in the second aerosol spray piece 44 passes through the area between the lower glue roller 42 and the colorful film.
A temperature control device for controlling the temperature of the air flow containing glue solution is arranged in each aerosol glue spraying nozzle 45, so that the temperature of the air flow containing glue solution sprayed out is consistent with the temperature of the colorful film, and the influence of expansion caused by heat and contraction caused by cold of the air flow containing glue solution sprayed out on the colorful film is avoided.
The inside of the upper rubber roller 41 and the lower rubber roller 42 are respectively provided with a ventilation cavity 46, the surface of the upper rubber roller 41 is provided with ventilation holes 47 communicated with the ventilation cavities 46, and the number of the ventilation holes 47 is three and the ventilation holes are distributed at equal intervals. The vent cavity 46 communicates with an air extraction device.
By arranging the first aerosol spray piece 43 and the second aerosol spray piece 44 on the upper and lower surfaces of the seven-color film respectively, the airflow containing the glue solution sprayed by the aerosol spray nozzle 45 circulates between the glue roller and the seven-color film, so that the seven-color film is not contacted with the glue rollers on two sides of the glue roller when passing through the gap formed between the upper glue roller 41 and the lower glue roller 42, and the vent hole 47 is not blocked. By the suction action of the suction device, the air flow spreading around after the glue solution is sprayed onto the surface of the colorful film will be sucked into the ventilation cavity 46, so as to eliminate part of the air flow spreading. Meanwhile, the upper rubber roll 41 may adsorb BOPP film on one side thereof only to the surface of the upper rubber roll 41, and the lower rubber roll 42 may adsorb OPP film on one side thereof only to the surface of the lower rubber roll 42. Once the glue-containing air flow is sucked into the ventilation cavity 46, the glue containing a certain mass is centrifugally thrown onto the BOPP film (or OPP film) or the seven-color film under the centrifugal action of the rotation speed of the glue roller.
Further, the pressing member 40 includes an upper pressing roller 48 and a lower pressing roller 38, which are matched with each other, a gap is provided between the upper pressing roller 48 and the lower pressing roller 38, which can allow the BOPP film, the seven-color film and the OPP film to pass through simultaneously, and the size of the gap is smaller than the sum thickness of the BOPP film, the seven-color film and the OPP film, so as to press the BOPP film, the seven-color film and the OPP film. Because the glue solution is sprayed on both sides of the colorful film, the both sides of the colorful film can be respectively compounded with the BOPP film and the OPP film under the action of external force. The compounded in-mold label is wound by the winding device 10.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (1)
1. Production equipment of in-mold labeling with seven color effects, characterized by: the device comprises an unreeling device (7), a shrinkage ratio adjusting device (8), a sizing and laminating device (9), a reeling device (10), a PLC (programmable logic controller) control assembly (11), a touch display screen (12) and a frequency converter, wherein the unreeling device (7) comprises a BOPP film unreeling mechanism (13), a seven-color film unreeling mechanism (14) and an OPP film unreeling mechanism (15), and the seven-color film unreeling mechanism (14) is positioned between the BOPP film unreeling mechanism (13) and the OPP film unreeling mechanism (15);
The BOPP film unreeling mechanism (13), the colorful film unreeling mechanism (14) and the OPP film unreeling mechanism (15) comprise an unreeling roller (16), a driven roller (17) and an unreeling tension adjusting roller (18), one side of the unreeling roller (16) is electrically connected with an unreeling variable frequency motor (19), one side of the unreeling tension adjusting roller (18) is electrically connected with an unreeling tension detecting device (20), and the output end of the unreeling tension detecting device (20) is connected with an unreeling frequency converter (21) for controlling the rotating speed of the unreeling variable frequency motor (19);
The winding device (10) comprises a winding roller (22), a traction roller (23), a driven roller (24) and a winding tension adjusting roller (25), wherein one side of the winding roller (22) is electrically connected with a winding variable frequency motor (26), one side of the winding tension adjusting roller (25) is electrically connected with a winding tension detecting device (27), and the output end of the winding tension detecting device (27) is connected with a winding frequency converter (28) for controlling the rotating speed of the winding variable frequency motor (26);
the shrinkage ratio adjusting device (8) comprises a shell (29), and a BOPP film shrinkage ratio adjusting piece (30), a seven-color film shrinkage ratio adjusting piece (31) and an OPP film shrinkage ratio adjusting piece (32) which are positioned in the shell (29), wherein the seven-color film shrinkage ratio adjusting piece (31) is positioned between the BOPP film shrinkage ratio adjusting piece (30) and the OPP film shrinkage ratio adjusting piece (32);
The BOPP film shrinkage ratio adjusting piece (30), the seven-color film shrinkage ratio adjusting piece (31) and the OPP film shrinkage ratio adjusting piece (32) comprise heating rollers (33), (34), (35), (36) and (37), the rotating speeds of the heating rollers (33), (34), (35), (36) and (37) are gradually decreased, an electric heating pipe capable of heating the heating rollers is arranged in each heating roller, one side of each heating roller is connected with a variable frequency motor for driving the heating roller to rotate, each variable frequency motor is connected with a frequency converter for controlling the rotating speed of the variable frequency motor, and the PLC control assembly (11) is connected with the touch display screen (12) and each frequency converter respectively; the temperature of each heating roller is independently controlled, and a temperature control system is formed by a temperature sensor, a temperature control meter and an electric heater tube, so that the temperature of each heating roller is ensured to be adjustable;
the sizing and laminating device (9) comprises a sizing piece (39) and a laminating piece (40), wherein the sizing piece (39) comprises a sizing roller (41) and a lower sizing roller (42) which are matched with each other, a gap for a seven-color film to pass through is formed between the sizing roller (41) and the lower sizing roller (42), the gap is larger than the thickness of the seven-color film and is used for the seven-color film to pass through, one side, far away from the lower sizing roller (42), of the sizing roller (41) is matched with the BOPP film, and one side, far away from the sizing roller (41), of the lower sizing roller (42) is matched with the OPP film;
The glue spraying device is characterized in that the glue spraying piece (39) further comprises a first aerosol glue spraying piece (43) and a second aerosol glue spraying piece (44) which are used for spraying glue on two sides of the colorful film respectively, the first aerosol glue spraying piece (43) and the second aerosol glue spraying piece (44) comprise aerosol glue spraying nozzles (45), the air flow containing glue sprayed by the aerosol glue spraying nozzles (45) in the first aerosol glue spraying piece (43) passes through the area between the glue spraying roller (41) and the colorful film, the air flow containing glue sprayed by the aerosol glue spraying nozzles (45) in the second aerosol glue spraying piece (44) passes through the area between the lower glue roller (42) and the colorful film, each aerosol glue spraying nozzle (45) is internally provided with a temperature control device which is used for controlling the air flow temperature containing glue to be consistent with the temperature of the colorful film, the inside of the glue spraying roller (41) and the lower glue spraying roller (42) is provided with cavities (46), the surface of the glue spraying roller (41) is provided with ventilation holes (47) which are communicated with the ventilation holes (47), and the ventilation holes (47) are distributed at equal intervals;
the pressing piece (40) comprises an upper pressing roller (48) and a lower pressing roller (38) which are matched with each other, a gap which can enable a BOPP film, a colorful film and an OPP film to pass through simultaneously is arranged between the upper pressing roller (48) and the lower pressing roller (38), and the size of the gap is smaller than the thickness of the BOPP film, the colorful film and the OPP film which are added together.
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