CN211106103U

CN211106103U - In-mold labeling and production equipment with seven-color effect

Info

Publication number: CN211106103U
Application number: CN201921494894.9U
Authority: CN
Inventors: 洪明邓; 王双方
Original assignee: Zhejiang Zhongyu Science And Technology Co ltd
Current assignee: Zhejiang Zhongyu Science And Technology Co ltd
Priority date: 2019-09-09
Filing date: 2019-09-09
Publication date: 2020-07-28
Anticipated expiration: 2029-09-09

Abstract

The utility model discloses a label in mould and production facility with seven various effects, including mutual adhesive transparent protection layer, printing layer, seven various rete and laminating layer 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 utility model discloses following beneficial effect has: 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

In-mold labeling and production equipment with seven-color effect

Technical Field

The utility model relates to a plastics blowing goods field, in particular to label in mould and production facility with seven various effects.

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.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a label and production facility in mould with seven various effects, the rich color of this kind of label in the mould all can bring splendid visual effect for bottle or injection molding when carrying out the label in the mould.

The above technical purpose of the present invention can be achieved by the following technical solutions: 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 utility model discloses further set up to: the printing layer is made by printing patterns or characters on the transparent protective layer.

The utility model discloses further set up to: the transparent protective layer is made of a material with good printing effect and high transparency.

The utility model discloses further set up to: the transparent protective layer is made of BOPP.

The utility model discloses further set up to: the printing layer can be a film with pattern display, and specifically, patterns or hollow patterns can be printed on the film.

The utility model discloses further set up 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 utility model discloses further set up to: the laminating layer is made of OPP.

The utility model discloses further set up 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 P L C control assembly, a touch display screen and a frequency converter, wherein the unwinding device comprises a BOPP film unwinding mechanism, a seven-color film unwinding mechanism and an OPP 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 utility model discloses further set up 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 roller to rotate, each variable frequency motor is connected with a frequency converter controlling the rotating speed of the variable frequency motor, and the P L C control component is respectively connected with the touch display screen and each frequency converter.

The utility model discloses further set up 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.

To sum up, the utility model discloses following beneficial effect has: 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 embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in 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 equipment for preparing labels in the mold of the present invention;

FIG. 3 is a simplified control diagram of the P L C control module;

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.

The production process comprises the following steps of reference numerals of 1, a transparent protective layer, 2, a printing layer, 3, a seven-color film layer, 4, a laminating layer, 5, a first glue layer, 6, a second glue layer, 7, an unreeling device, 8, a shrinkage ratio adjusting device, 9, a gluing pressing device, 10, a reeling device, 11, a P L C control component, 12, a touch display screen, 13, a BOPP film unreeling mechanism, 14, a seven-color film unreeling mechanism, 15, an OPP film unreeling mechanism, 16, an unreeling roller, 17, a driven roller, 18, an unreeling tension adjusting roller, 19, an unreeling variable frequency motor, 20, an unreeling tension detecting device, 21, an unreeling frequency converter, 22, a reeling roller, 23, a traction roller, 24, a driven roller, 25, a reeling tension adjusting roller, 26, a reeling variable frequency motor, 27, a reeling tension detecting device, 28, a reeling frequency converter, 29, a shell, 30, a BOPP film shrinkage ratio adjusting piece, 31, a seven-color film shrinkage ratio adjusting piece, 32, a mist film shrinkage ratio adjusting piece, 33-37, a heating roller, a lower roller, a pressure roller, a lower adhesive spraying nozzle, a lower adhesive pressing roller, a lower nozzle.

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 present invention belongs.

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, an apparatus for producing an in-mold label with a 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 P L C control component 11, a touch display screen 12 and a frequency converter, wherein the unwinding device 7 includes 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 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 P L C control component 11 is respectively connected with the touch display screen 12 and the frequency converter (including 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, transmits a control signal to the P L C control component 11, and sends the control signal to each frequency converter control motor to realize speed regulation after being analyzed and processed by the P L C control component 11. in the application, the unreeling device 7 realizes the active unreeling of constant tension and constant linear speed by forming a closed-loop control system through the unreeling frequency converter motor 19, the unreeling frequency converter 21, the unreeling tension adjusting roller 18 and the unreeling tension detecting device 20, and the reeling device 10 realizes the active reeling of constant tension and constant linear speed by adopting the same principle as the unreeling device 7.

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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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 substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

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 production equipment for the in-mold labeling with the seven-color effect is used for producing the in-mold labeling with the seven-color effect as claimed in claim 6, and is characterized by comprising an unwinding device (7), a shrinkage ratio adjusting device (8), a gluing and laminating device (9), a winding device (10), a P L C 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 8, 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 piece (30), the colorful film shrinkage ratio adjusting piece (31) and the OPP film shrinkage ratio adjusting piece (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 P L C 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 9, 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.