CN110626032A - In-mold labeling and production equipment with seven-color effect - Google Patents
In-mold labeling and production equipment with seven-color effect Download PDFInfo
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- CN110626032A CN110626032A CN201910849383.2A CN201910849383A CN110626032A CN 110626032 A CN110626032 A CN 110626032A CN 201910849383 A CN201910849383 A CN 201910849383A CN 110626032 A CN110626032 A CN 110626032A
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- 230000000694 effects Effects 0.000 title claims abstract description 34
- 238000002372 labelling Methods 0.000 title abstract description 13
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 238000001746 injection moulding Methods 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 80
- 239000003292 glue Substances 0.000 claims description 64
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 57
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 57
- 238000004804 winding Methods 0.000 claims description 50
- 239000000443 aerosol Substances 0.000 claims description 37
- 238000005507 spraying Methods 0.000 claims description 37
- 238000010438 heat treatment Methods 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 30
- 238000007639 printing Methods 0.000 claims description 30
- 238000004026 adhesive bonding Methods 0.000 claims description 21
- 239000000243 solution Substances 0.000 claims description 21
- 239000011241 protective layer Substances 0.000 claims description 19
- 238000004513 sizing Methods 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 17
- 238000010030 laminating Methods 0.000 claims description 14
- 238000009423 ventilation Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 6
- 230000006835 compression Effects 0.000 claims 4
- 238000007906 compression Methods 0.000 claims 4
- 230000000007 visual effect Effects 0.000 abstract description 5
- 239000003086 colorant Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000005026 oriented polypropylene Substances 0.000 description 38
- 239000000463 material Substances 0.000 description 9
- 230000001276 controlling effect Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000001795 light effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
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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 device 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 effect to the bottle body or the injection molding piece when the in-mold label is labeled.
Description
Technical Field
The invention relates to the field of plastic blow molding products, in particular to an in-mold label with a colorful effect and production equipment thereof.
Background
The label technology in injection mould is that special pattern is printed on OPP material and then a layer of PP film is compounded, that is, before blow moulding and injection moulding, the printed mould is stuck in the mould and then placed in the mould, and the mould is stuck with the surface of bottle body or injection moulding and fused together under the action of high temp. and high pressure in the mould, so that a finished packing container is formed. The biggest characteristic of the container using the in-mold labeling is that the label and the bottle body are on the same surface, and the color pictures and texts of the label are sensed as if the label is directly printed on the surface of the bottle body.
However, the color of the existing in-mold sticker is not rich, so that when the in-mold sticker is applied to a bottle body for packaging, a good visual effect cannot be brought to a customer, and thus the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an in-mold label with a colorful effect and production equipment thereof, wherein the in-mold label is rich in color, and can bring an excellent visual effect to a bottle body or an injection molding part when in-mold labeling is carried out.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides an in mould label and production facility with seven various effects, includes transparent protective layer, printing layer, seven various retes and the laminating layer of mutual bonding in proper order, one side that seven various retes were kept away from to the laminating layer cooperatees with the surface of bottle injection molding.
The invention is further configured to: the printing layer is made by printing patterns or characters on the transparent protective layer.
The invention is further configured to: the transparent protective layer is made of a material with good printing effect and high transparency.
The invention is further configured to: the transparent protective layer is made of BOPP.
The invention is further configured to: the printing layer can be a film with pattern display, and specifically, patterns or hollow patterns can be printed on the film.
The invention is further configured to: 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 configured to: the laminating layer is made of OPP.
The invention is further configured to: the first glue layer and the second glue layer are made of high-temperature-resistant glue.
A production device with a seven-color effect for in-mold labeling comprises an unwinding device, a contraction ratio adjusting device, a gluing and laminating device, a winding device, a PLC (programmable logic controller) control assembly, a touch display screen and a frequency converter, wherein the unwinding device comprises a BOPP (biaxially-oriented polypropylene) film unwinding mechanism, a seven-color film unwinding mechanism and an OPP (oriented polypropylene) film unwinding mechanism, and the seven-color film unwinding mechanism is positioned between the BOPP film unwinding mechanism and the OPP film unwinding mechanism;
the BOPP film unwinding mechanism, the colorful film unwinding mechanism and the OPP film unwinding mechanism respectively comprise an unwinding roller, a driven roller and an unwinding tension adjusting roller, one side of the unwinding roller is electrically connected with an unwinding variable frequency motor, one side of the unwinding tension adjusting roller is electrically connected with an unwinding tension detecting device, and the output end of the unwinding tension detecting device is connected with an unwinding frequency converter for controlling the rotating speed of the unwinding 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 frequency converter for controlling the rotating speed of the winding variable frequency motor.
The invention is further configured to: the shrinkage ratio adjusting device comprises a shell, and a BOPP film shrinkage ratio adjusting piece, a colorful film shrinkage ratio adjusting piece and an OPP film shrinkage ratio adjusting piece which are positioned in the shell, wherein the colorful 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 part, the colorful film shrinkage ratio adjusting part and the OPP film shrinkage ratio adjusting part respectively comprise five heating rollers, the rotating speeds of the five heating rollers are sequentially 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 driving the heating rollers to rotate, each variable frequency motor is connected with a frequency converter 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 configured to: 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 through which a colorful film can pass is formed between the sizing roller and the lower rubber roller, the gap is larger than the thickness of the colorful film so as to allow the colorful film to pass, 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 gluing piece also comprises a first aerosol glue spraying piece and a second aerosol glue spraying piece which are used for spraying glue on two sides of the colorful film respectively, the first aerosol glue spraying part and the second aerosol glue spraying part both comprise aerosol glue spraying nozzles, the aerosol glue spraying nozzles in the first aerosol glue spraying part spray glue-containing air flow which passes through the area between the gluing roller and the colorful film, the air current containing glue solution sprayed out by the aerosol glue-spraying nozzle in the second aerosol glue-spraying piece passes through the area between the lower glue roller and the colorful film, a temperature control device for controlling the temperature of the sprayed air current containing glue solution to be consistent with the temperature of the colorful film is arranged in each aerosol glue-spraying nozzle, the inner parts of the upper rubber roller and the lower rubber roller are both provided with a ventilation cavity, the surface of the upper rubber roller is provided with a ventilation hole communicated with the ventilation cavity, the number of the vent holes is three, the vent holes are arranged at equal intervals, and the vent cavities are communicated with an air extraction device;
the laminating piece comprises an upper pressing roller and a lower pressing roller which are matched with each other, a gap through which the BOPP film, the colorful film and the OPP film can pass 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.
In conclusion, the invention has the following beneficial effects: through with the printing layer clamp between transparent protective layer and seven various rete for this printing layer does not contact the real object, also does not contact people, and then avoids it to fade in long-term use under the guard action of transparent protective layer. Meanwhile, the colorful film layer is also called as a rainbow film and is a multilayer film, and by fully utilizing the principle of light interference, after light rays sequentially penetrate through the transparent protective layer and the printing layer to the colorful film layer under the irradiation of light rays, the multi-angle layered color change among the layers is replaced by refraction and interference among the layers, and the effect is like sky rainbow. The rainbow film has the effect that the rich light effects of the rainbow film base materials with different distances and different angles can present completely different colorful effects.
Based on the combination of the rainbow film and the printing layer, the magic color effect generated by the rainbow film under the irradiation of light is combined with the patterns on the printing layer, so that the patterns on the printing layer have rich colors, and further, the bottle body or the injection molding piece can have excellent visual effect.
More specifically, it is as follows: if the bottle body is made of transparent material, the color of the solution (such as beverage) filled in the bottle body is various, the color which is reflected to the colorful film layer under the action of light can be changed, so that the colorful effect is influenced by the color of the solution in the bottle body, and the color is changed variously. The name of the colorful film layer is various, and the colorful film layer can be a colorful film, a laser colorful iris film and the like.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural view of an in-mold label of the present invention;
FIG. 2 is a control schematic diagram of the production apparatus for in-mold labeling of the present invention;
FIG. 3 is a simplified control diagram of a PLC control assembly;
FIG. 4 is a schematic structural diagram of the upper rubber roller, the lower rubber roller, the colorful film layer and the aerosol spray piece.
Reference numerals: 1. a transparent protective layer; 2. printing layer; 3. a colorful film layer; 4. laminating layers; 5. a first glue layer; 6. a second glue layer; 7. an unwinding device; 8. a contraction ratio adjusting device; 9. a gluing and pressing device; 10. a winding device; 11. a PLC control component; 12. a touch display screen; 13. a BOPP film unwinding mechanism; 14. a seven-color film unwinding mechanism; 15. an OPP film unwinding mechanism; 16. unwinding rollers; 17. a driven roller; 18. unwinding tension adjusting rollers; 19. unwinding a variable frequency motor; 20. an unwinding tension detection device; 21. unwinding a frequency converter; 22. a wind-up roll; 23. a traction roller; 24. a driven roller; 25. a winding tension adjusting roller; 26. winding a variable frequency motor; 27. a winding tension detection device; 28. a winding frequency converter; 29. a housing; 30. a BOPP film shrinkage ratio adjusting piece; 31. a seven-color film shrinkage ratio adjusting piece; 32. an OPP film shrinkage ratio adjusting piece; 33-37, heated rolls; 38. a lower pressing roller; 39. gluing parts; 40. a pressing part; 41. gluing a rubber roller; 42. a rubber roller is arranged; 43. a first aerosol spray part; 44. a second aerosol spray part; 45. an aerosol glue-spraying nozzle; 46. a venting cavity; 47. a vent hole; 48. and (4) pressing the rolls.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The first embodiment is as follows:
as shown in fig. 1, the in-mold label with a colorful effect comprises a transparent protective layer 1, a printing layer 2, a colorful film layer 3 and an attaching layer 4 which are sequentially adhered to each other, wherein one side of the attaching layer 4 is attached to the outer surface of a bottle body or an injection molding part at a high temperature.
Specifically, the following are mentioned: the printing layer 2 is sandwiched between the transparent protective layer 1 and the colorful film layer 3, so that the printing layer 2 is not in contact with objects and people, 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 1. Meanwhile, since the colorful film layer 3 is also called as a rainbow film, which is a multilayer film, by fully utilizing the principle of light interference, after light rays sequentially penetrate through the transparent protective layer 1, the printing layer 2 and the colorful film layer 3 under the irradiation of light rays, the multi-angle layer type color change among the layers is replaced by refraction and interference among the layers, and the effect like sky rainbow is achieved. The rainbow film has the effect that the rich light effects of the rainbow film base materials with different distances and different angles can present completely different colorful effects.
Based on the combination of the rainbow film and the printing layer 2, the magic color effect generated by the rainbow 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 have rich colors, and further, the bottle body or the injection molding piece can have excellent visual effect.
More specifically, it is as follows: if the bottle body is made of transparent material, the color of the solution (such as beverage) filled in the bottle body is various, the color which is reflected to the colorful film layer 3 under the action of light can be changed, so that the colorful effect is influenced by the color of the solution in the bottle body, and the color is changed variously.
Further, the printed layer 2 is made by printing a specific pattern or letter on the transparent protective layer 1.
Furthermore, the transparent protection 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, specifically, a pattern or a hollow pattern may be printed on the film.
Further, a first glue layer 5 is arranged between one 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 binding layer 4.
Further, the material of the adhesive 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 high temperature resistant standard is preferably high temperature resistant more than 100 ℃.
Example two:
as shown in fig. 2-4, a production apparatus for in-mold labeling with seven-color effect includes an unwinding device 7, a shrinkage ratio adjusting device 8, a gluing and laminating device 9, a winding device 10, a PLC control component 11, a touch display screen 12 and a frequency converter. The unwinding device 7 comprises a BOPP film unwinding mechanism 13, a seven-color film unwinding mechanism 14 and an OPP film unwinding mechanism 15, wherein the seven-color film unwinding mechanism 14 is located between the BOPP film unwinding mechanism 13 and the OPP film unwinding mechanism 15.
The BOPP film unwinding mechanism 13, the seven-color film unwinding mechanism 14, and the OPP film unwinding mechanism 15 each include an unwinding roller 16, a driven roller 17, and an unwinding tension adjusting roller 18. One side of the unwinding roller 16 is electrically connected with an unwinding variable frequency motor 19, one side of the unwinding tension adjusting roller 18 is electrically connected with an unwinding tension detection device 20, and an output end of the unwinding tension detection device 20 is connected with an unwinding frequency converter 21 for controlling the rotating speed of the unwinding 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 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 colorful film shrinkage ratio adjusting piece 31 and an OPP film shrinkage ratio adjusting piece 32 which are positioned in the shell 29, wherein the colorful 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 member 30, the rainbow film shrinkage ratio adjusting member 31, and the OPP film shrinkage ratio adjusting member 32 each include heating rollers 33, 34, 35, 36, 37. Every warming mill all embeds has the electric heating pipe that can heat the warming mill, and one side of every warming mill all is connected with and drives its pivoted inverter motor, and every inverter motor is connected with the converter of its rotational speed of control.
The PLC control unit 11 is connected to the touch display 12 and the frequency converter (including the unwinding frequency converter 21, the winding frequency converter 28, and the frequency converter for controlling the rotation of the heating roller). The touch display screen 12 is used as an input end, transmits the control signal to the PLC control assembly 11, and sends the control signal to each frequency converter control motor to realize speed regulation after being analyzed and processed by the PLC control assembly 11. In the application, the unreeling device 7 realizes the active unreeling with constant tension and constant linear speed by forming a closed-loop control system by an unreeling frequency conversion motor 19, an unreeling frequency converter 21, an unreeling tension adjusting roller 18 and an unreeling tension detecting device 20; the winding device 10 adopts the same principle as the unwinding device 7 to realize active winding with constant tension and constant linear velocity.
Because the in-mold labeling is formed by compounding a plurality of layers, the shrinkage rate of each layer of material is different because the material used by each layer is different, and the prepared in-mold labeling has the problems of wrinkles, curls and the like. By matching the exterior surface of the bottle/injection molded part with a wrinkled, curled in-mold label, the external aesthetics of the product is affected. Therefore, when the label is formed in the mold with wrinkles and curls in actual production, the label is often regarded as a newspaper waste and is not distributed in the market. But at the same time, the production cost of the enterprise is increased, and the economic benefit of the enterprise is reduced.
Because the shrinkage rates of the BOPP film, the colorful film and the OPP film entering the shrinkage ratio adjusting device 8 are different at different temperatures, the shrinkage ratios of the BOPP film, the colorful film and the OPP film are respectively adjusted by the BOPP film shrinkage ratio adjusting part 30, the colorful film shrinkage ratio adjusting part 31 and the OPP film shrinkage ratio adjusting part 32 after entering the shrinkage ratio adjusting device 8, so that the shrinkage ratios of the BOPP film, the colorful film and the OPP film after coming 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 the in-mold labeling with the specific colorful effect by the gluing and pressing device 9, and finally the in-mold labeling is wound by the winding device 10.
The shrinkage ratio regulating principle of the BOPP film shrinkage ratio regulating part 30, the colorful film shrinkage ratio regulating part 31 and the OPP film shrinkage ratio regulating part 32 is as follows: in this embodiment, the shrinkage ratio of the BOPP film is adjusted by the BOPP film shrinkage ratio adjusting unit 30. The adjusting principle of the colorful film shrinkage ratio adjusting part 31 and the OPP film shrinkage ratio adjusting part 32 is the same as that of the BOPP film shrinkage ratio adjusting part 30, and detailed description is omitted here.
Five heating rollers 33, 34, 35, 36, 37 are included in the BOPP film shrinkage ratio adjusting member 30, and the rotation speeds of the five heating rollers are sequentially decreased. The BOPP film is continuously shrunk through five heating rollers in sequence, and finally is taken out from the shell 29 under the driving 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 pipe and the like so as to ensure 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 sequence, each heating roller is provided with a variable frequency motor and a frequency converter to control the rotating speed of the variable frequency motor and the frequency converter. The rotating speed of the heating roller can indicate the contact time of the heating roller and the BOPP film. When the rotation speed of the heating roller is reduced, the time of contact with the heating roller increases. The contact time of the BOPP film at a certain temperature is different, and the shrinkage is different. To achieve the adjustment of the predetermined shrinkage amount, it is necessary to determine the time t required for the BOPP film to pass through the five heated rollers, the temperature of the heated rollers, and the total length of the stroke through the five heated rollers as S meters, and set n% as the shrinkage rate.
The unwinding linear speed is V1= (1+ n%) S/t, and the winding linear speed is V2= V1 (1-n%), yielding V2/V1 = 1-n%. The surface linear velocity of the heating roller 33 is matched with the unwinding linear velocity, and the surface linear velocity of the heating roller 37 is matched with the winding linear velocity.
If a BOPP film with low shrinkage as disclosed in CN105829409B was used for the in-mold labeling described in this application. The patent document shows that the shrinkage of BOPP is 3.0-6.0% at 120 ℃ for 5 min. The median value of this value, i.e. n%, was taken to be 4.5% in the test. Thus, in the case where the time required to pass through the five heating rollers and the total length of the stroke passing through the five heating rollers are determined, the unwinding linear speed V1 and the winding linear speed V2 can be calculated.
It is assumed that the shrinkage rates of the OPP film and the heptachromatic film at the respective temperatures are both 10%. The shrinkage of the BOPP film needs to be adjusted to 10% to achieve the same shrinkage as the OPP film and the colorful film. Therefore, the three films compounded with each other have the same shrinkage rate, so that the prepared in-mold label with the colorful effect has no wrinkles and no curls.
Then, in the case where the BOPP film unwinding linear speed is known as V1, the winding linear speed V2 is obtained by substituting a value where n% is 10% into the winding linear speed V2= V1 (1-n%). The rotation speeds of the five heated rollers in the BOPP film shrinkage ratio adjusting member 30 are sequentially decreased. When the unwinding linear speed, that is, the linear speed of the heating roller 33 is not changed, the winding linear speed, that is, the linear speed of the heating roller 37 is reduced, so that the contact time between the BOPP film and the five heating rollers becomes longer, and the shrinkage thereof becomes larger. The principle of adjusting the shrinkage rate of the OPP film and the colorful film is the same as that of the OPP film and the colorful film. And will not be described in detail herein.
As shown in fig. 2 and 4, the gluing and pressing device 9 comprises a gluing member 39 and a pressing member 40.
The gluing part 39 comprises a gluing roller 41 and a gluing roller 42 which are matched with each other, a gap through which the colorful film can pass is arranged between the gluing roller 41 and the gluing roller 42, and the gap is larger than the thickness of the colorful film so as to allow the colorful film to pass. One side of the upper rubber roller 41, which is far away from the lower rubber roller 42, is matched with the BOPP film, and one side of the lower rubber roller 42, which is far away from the upper rubber roller 41, is matched with the OPP film. The gluing part 39 further comprises a first aerosol spraying part 43 and a second aerosol spraying part 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 both comprise aerosol glue-spraying nozzles 45, the air flow containing glue solution sprayed by the aerosol glue-spraying nozzles 45 in the first aerosol glue-spraying piece 43 passes through the area between the upper glue roller 41 and the colorful film, and the air flow containing glue solution 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.
And a temperature control device for controlling the temperature of the air flow which is sprayed out and contains the glue solution is arranged in each aerosol glue spraying nozzle 45, so that the temperature of the air flow which is sprayed out and contains the glue solution is consistent with that of the seven-color film, and the seven-color film is prevented from being influenced by expansion with heat and contraction with cold of the sprayed air flow which contains the glue solution.
The inner parts of the gluing roller 41 and the lower gluing roller 42 are both provided with ventilation cavities 46, the surface of the gluing 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 47 are arranged at equal intervals. The vent cavity 46 communicates with a suction device.
By arranging the first aerosol glue spraying piece 43 and the second aerosol glue spraying piece 44 on the upper surface and the lower surface of the colorful film respectively, the aerosol glue spraying nozzle 45 sprays glue-containing air flow to circulate between the rubber roller and the colorful film, so that the colorful film cannot be contacted with the rubber rollers on the two sides when passing through a gap formed between the upper rubber roller 41 and the lower rubber roller 42, and further cannot block the air vent 47. The air flow diffused around after the glue is sprayed on the surface of the seven-color film is sucked into the ventilation cavity 46 by the suction action of the suction device to eliminate part of the diffused air flow. Meanwhile, the upper glue roller 41 can adsorb the BOPP film on one side thereof only to the surface of the upper glue roller 41, and the lower glue roller 42 can adsorb the OPP film on one side thereof only to the surface of the lower glue roller 42. Once the air flow containing the glue solution is sucked into the ventilation cavity 46, the glue solution with a certain mass is centrifugally thrown out to the BOPP film (or OPP film) or the colorful film under the centrifugal action of the self rotating speed of the rubber roll.
Further, the pressing piece 40 comprises an upper pressing roller 48 and a lower pressing roller 38 which are matched with each other, a gap through which the BOPP film, the colorful film and the OPP film can pass is formed 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, so that the three films can be pressed together. Because the glue solution is sprayed on both sides of the colorful film, 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 a winding device 10.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. An in-mold label with colorful effect is characterized in that: including transparent protective layer (1), printing layer (2), seven various rete (3) and laminating layer (4) of mutual bonding in proper order, one side that seven various rete (3) were kept away from in laminating layer (4) cooperatees with the surface of bottle injection molding.
2. The in-mold label with seven-color effect as claimed in claim 1, wherein: the printing layer (2) is made by printing patterns or characters on the transparent protective layer (1) through thermochromic ink.
3. The in-mold label with seven-color effect as claimed in claim 1, wherein: the printing layer (2) can be a film with pattern display, and specifically, patterns or hollow patterns can be printed on the film through thermochromic ink.
4. The in-mold label with seven-color effect as claimed in claim 2, wherein: the transparent protective layer (1) is made of BOPP.
5. The in-mold label with seven-color effect as claimed in claim 4, wherein: a first glue layer (5) is arranged between one side of the transparent protective layer (1) with the printing layer (2) and the colorful film layer (3), and a second glue layer (6) is arranged between the colorful film layer (3) and the attaching layer (4).
6. The in-mold label with seven-color effect as claimed in claim 5, wherein: the laminating layer (4) is made of OPP.
7. The in-mold label with seven-color effect as claimed in claim 5, wherein: the first glue layer (5) and the second glue layer (6) are made of high-temperature-resistant glue.
8. The apparatus for producing in-mold labels with seven-color effect as claimed in claim 6, wherein: the device comprises an unwinding device (7), a shrinkage ratio adjusting device (8), a gluing pressing device (9), a winding device (10), a PLC (programmable logic controller) control assembly (11), a touch display screen (12) and a frequency converter, wherein the unwinding device (7) comprises a BOPP film unwinding mechanism (13), a seven-color film unwinding mechanism (14) and an OPP film unwinding mechanism (15), and the seven-color film unwinding mechanism (14) is positioned between the BOPP film unwinding mechanism (13) and the OPP film unwinding mechanism (15);
the BOPP film unwinding mechanism (13), the colorful film unwinding mechanism (14) and the OPP film unwinding mechanism (15) respectively comprise an unwinding roller (16), a driven roller (17) and an unwinding tension adjusting roller (18), one side of the unwinding roller (16) is electrically connected with an unwinding variable frequency motor (19), one side of the unwinding tension adjusting roller (18) is electrically connected with an unwinding tension detecting device (20), and the output end of the unwinding tension detecting device (20) is connected with an unwinding frequency converter (21) for controlling the rotating speed of the unwinding 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 detection device (27), and the output end of the winding tension detection device (27) is connected with a winding frequency converter (28) for controlling the rotating speed of the winding variable frequency motor (26).
9. The apparatus for producing in-mold labels with seven-color effect as claimed in claim 6, wherein: the shrinkage ratio adjusting device (8) comprises a shell (29), and a BOPP film shrinkage ratio adjusting piece (30), a colorful film shrinkage ratio adjusting piece (31) and an OPP film shrinkage ratio adjusting piece (32) which are positioned in the shell (29), wherein the colorful 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 part (30), the colorful film shrinkage ratio adjusting part (31) and the OPP film shrinkage ratio adjusting part (32) respectively comprise heating rollers (33), (34), (35), (36) and (37), the rotating speeds of the heating rollers (33), (34), (35), (36) and (37) are sequentially reduced, 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 driving the heating rollers to rotate, each variable frequency motor is connected with a frequency converter controlling the rotating speed of the variable frequency motor, and the PLC control component (11) is respectively connected with the touch display screen (12) and each frequency converter.
10. The apparatus for producing in-mold labels with seven-color effect as claimed in claim 6, wherein: the sizing and laminating device (9) comprises a sizing part (39) and a laminating part (40), the sizing part (39) comprises a sizing roller (41) and a lower sizing roller (42) which are matched with each other, a gap through which a seven-color film can pass is arranged between the sizing roller (41) and the lower sizing roller (42), the gap is larger than the thickness of the seven-color film so as to allow the seven-color film to pass, one side, away from the lower sizing roller (42), of the sizing roller (41) is matched with the BOPP film, and one side, away from the sizing roller (41), of the lower sizing roller (42) is matched with the OPP film;
the gluing part (39) further comprises a first aerosol glue spraying part (43) and a second aerosol glue spraying part (44) which are used for spraying glue on two sides of the colorful film respectively, the first aerosol glue spraying part (43) and the second aerosol glue spraying part (44) both comprise aerosol glue spraying nozzles (45), the airflow containing glue solution sprayed by the aerosol glue spraying nozzles (45) in the first aerosol glue spraying part (43) passes through the area between the upper rubber roll (41) and the colorful film, the airflow containing glue solution sprayed by the aerosol glue spraying nozzles (45) in the second aerosol glue spraying part (44) passes through the area between the lower rubber roll (42) and the colorful film, a temperature control device for controlling the temperature of the sprayed airflow containing glue solution to be consistent with the temperature of the colorful film is arranged in each aerosol glue spraying nozzle (45), ventilation cavities (46) are arranged in the upper rubber roll (41) and the lower rubber roll (42), and ventilation holes (47) communicated with the ventilation cavities (46) of the upper rubber roll (41) are arranged on the surface of the upper rubber roll (41), the number of the vent holes (47) is three, the vent holes are arranged at equal intervals, and the vent cavity (46) is communicated with an air extraction device;
the pressfitting spare (40) is including last compression roller (48) and lower compression roller (38) of mutually supporting, it can let BOPP membrane, seven various membranes and OPP membrane pass through the space simultaneously to be provided with between last compression roller (48) and lower compression roller (38), the size in space is less than the thickness that BOPP membrane, seven various membranes and OPP membrane three add.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910849383.2A CN110626032B (en) | 2019-09-09 | 2019-09-09 | In-mold labeling with colorful effect and production equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910849383.2A CN110626032B (en) | 2019-09-09 | 2019-09-09 | In-mold labeling with colorful effect and production equipment thereof |
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| CN110626032A true CN110626032A (en) | 2019-12-31 |
| CN110626032B CN110626032B (en) | 2024-05-28 |
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|---|---|
| CN110626032B (en) | 2024-05-28 |
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