Automatic laminating apparatus for adhesive labels

Abstract

The utility model relates to not dry adhesive label processing technical field, and disclose an automatic laminating equipment of not dry adhesive label, including the rack, the rack inside is provided with laminating groove, and the rack side wall is provided with laminating mechanism, and the rack side wall is provided with roll material mechanism, and the compression roller is provided with protection structure inside, when hot air wind power is small, the guide vane slowly rotates under the airflow thrust, presents the gentle open state, reduces the airflow resistance, ensures that hot air can pass smoothly and gather to the ventilation cavity, when hot air wind power increases, the impact of airflow on the guide vane enhances, and the guide vane is further rotated, and the opening angle becomes big, and partial airflow can be shunted, and the local flow rate is slowed down, avoid the airflow disorder or turbulence due to excessive wind power, when hot air wind power weakens or stops, the elastic gasket will reset force of deformation by its elasticity, and the sleeve rotates around the clamp rod, and the guide vane is automatically returned to the initial state, and the next airflow adjustment is prepared.

Description

Technical Field

[0001] This utility model relates to the field of self-adhesive label processing technology, specifically to an automatic laminating device for self-adhesive labels. Background Technology

[0002] Self-adhesive labels are mainly paper-based composite materials with adhesive coated on the back and then covered with silicone-coated protective paper. Self-adhesive labels have diverse functions and are widely used in food, cosmetics, and barcodes. They can also be used as signs for electronic products, machinery, and other special environments. During the production process, self-adhesive labels need to be coated with a film to enhance their surface decoration.

[0003] For example, CN222473365U discloses an automatic self-adhesive laminating device. This device places the material in a placement trough, and then the material rollers roll up the film so that the film is above the material. At this time, the drive component controls the laminating frame to move up and down, so that the laminating frame can cover the placement frame. Then, the laminating component automatically completes the laminating work.

[0004] However, when the device is used directly, if there is a trace amount of moisture on the surface of the self-adhesive paper or the adhesive has not reached the optimal activation temperature, air bubbles are easily left between the film and the paper, and the adhesion is insufficient, which makes the film easy to lift and fall off after lamination. In view of this, we propose an automatic lamination device for self-adhesive labels. Utility Model Content

[0005] The purpose of this invention is to provide an automatic laminating device for self-adhesive labels to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic laminating device for self-adhesive labels, comprising a placement rack, a laminating groove inside the placement rack, a laminating mechanism on the side wall of the placement rack, a roll-up mechanism on the side wall of the placement rack, two sets of fixing plates fixedly installed on the side wall of the placement rack, one set of fixing plates having a rotating rod rotatably connected through the side wall of the fixing plate via a bearing, and the other set of fixing plates having a hollow tube rotatably connected through the side wall of the fixing plate via a bearing, a pressure roller being fixedly installed at the adjacent ends of the rotating rod and the hollow tube, a motor being fixedly installed on the side wall of the fixing plate, the output shaft of the motor being fixedly connected to the end of the rotating rod, and a protective structure being provided inside the pressure roller;

[0007] The protective structure includes a one-way valve rotatably connected to the end of the hollow tube via a rotary joint. A vent pipe is fixedly installed at the end of the one-way valve away from the hollow tube. A venting cavity is opened inside the pressure roller. A conical cavity is opened on the side wall of the venting cavity. Four sets of air guide ribs are fixedly installed in a circumferential array on the inner wall of the venting cavity. Several sets of air outlet holes are opened between two adjacent sets of air guide ribs.

[0008] Preferably, the protective structure further includes a guide groove formed on the side wall of the conical cavity. The inner wall of the guide groove is fixedly installed with several sets of protrusions in an array. The protrusions can create turbulence on the flowing hot air, break the laminar flow state of the airflow, and make the hot air energy distribution more uniform.

[0009] Preferably, the guide channel has four sets, which are distributed in a circumferential array on the inner wall of the conical cavity, and can fully cover the inner area of ​​the conical cavity to ensure that hot air from different directions can be effectively guided.

[0010] Preferably, the end of the conical cavity away from the ventilation cavity is in communication with the interior of the hollow tube, a hot air box is fixedly installed on the side wall of the placement rack, and the end of the ventilation pipe away from the one-way valve is fixedly connected to the side wall of the hot air box. The ventilation pipe and the interior of the hot air box are interconnected to ensure stable hot air delivery without leakage.

[0011] Preferably, the guide channel is spiral-shaped and connected to the ventilation cavity. The spiral structure can guide the hot air to form a stable spiral airflow, prolong the residence time of the hot air in the cavity, and improve the heat transfer efficiency.

[0012] Preferably, the conical cavity is provided with a guide structure, the guide structure including two sets of clamping plates fixedly installed on the inner wall of the conical cavity, the ends of the two sets of clamping plates are fixedly connected to a clamping rod, the inner wall of the clamping rod is provided with an annular groove, the inner wall of the annular groove is fixedly installed with an elastic gasket, the surface of the clamping rod is sleeved with a sleeve, and the side wall of the sleeve is fixedly installed with a guide vane.

[0013] Preferably, the guide structure is provided in four sets, and the four sets of guide structures are distributed in a circumferential array on the inner wall of the conical cavity.

[0014] Compared with the prior art, this utility model provides an automatic laminating device for self-adhesive labels, which has the following beneficial effects:

[0015] 1. This automatic laminating equipment for self-adhesive labels effectively solves the problems of air bubbles and peeling when bonding film and paper by setting up a protective structure, thereby improving the bonding stability. Hot air is continuously delivered into the pressure roller through a hot air box, and the hot air can fully act on the self-adhesive paper and film in the laminating area. At this time, the four sets of air guide ribs on the inner wall of the air chamber are distributed in a circumferential array, which can divert and guide the hot air. With the help of several sets of air outlets between adjacent air guide ribs, the hot air is evenly discharged from the surface of the pressure roller, ensuring that the laminating area covered by the pressure roller is heated evenly, and further improving the uniformity of the bonding effect.

[0016] 2. The automatic laminating equipment for self-adhesive labels further optimizes the airflow direction by setting a guide structure. The guide vanes can flexibly adjust their angle under the action of airflow to guide the hot air in a secondary manner, ensuring that the hot air can flow into the ventilation chamber smoothly and evenly, thus ensuring uniform airflow in the future. At the same time, the guide structure can adaptively adjust the angle of the guide vanes according to the strength of the hot air. When the airflow weakens, it can automatically return to the correct position through elastic pads, further ensuring the uniformity of airflow. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the pressure roller of this utility model;

[0019] Figure 3 This is a cross-sectional view of the pressure roller section of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the conical cavity of this utility model;

[0021] Figure 5 This is a partial cross-sectional view of the sleeve section of this utility model.

[0022] In the diagram: 1. Placement rack; 2. Coating tank; 3. Protective structure; 4. Guide structure; 5. Coating mechanism; 6. Rolling mechanism; 7. Fixing plate; 8. Hollow tube; 9. Pressure roller; 10. Hot air box; 31. One-way valve; 32. Vent pipe; 33. Vent chamber; 34. Conical cavity; 35. Air guide rib; 36. Air outlet; 37. Flow guide groove; 38. Protrusion; 41. Clamping plate; 42. Clamping rod; 43. Elastic gasket; 44. Sleeve; 45. Guide vane; 15. Motor. Detailed Implementation

[0023] like Figures 1-5 As shown, this utility model provides a technical solution: an automatic laminating device for self-adhesive labels, including a placement rack 1, a laminating groove 2 inside the placement rack 1, a laminating mechanism 5 on the side wall of the placement rack 1, a rolling mechanism 6 on the side wall of the placement rack 1, two sets of fixing plates 7 fixedly installed on the side wall of the placement rack 1, a rotating rod rotatably connected to one set of fixing plates 7 through the side wall and through the bearing, and a hollow tube 8 rotatably connected to the other set of fixing plates 7 through the side wall and through the bearing, a pressure roller 9 fixedly installed at the end of the rotating rod and the hollow tube 8 close to each other, a motor 15 fixedly installed on the side wall of the fixing plate 7, the output shaft of the motor 15 fixedly connected to the end of the rotating rod, and a protective structure 3 provided inside the pressure roller 9;

[0024] The protective structure 3 includes a one-way valve 31 rotatably connected to the end of the hollow tube 8 via a rotary joint. A vent pipe 32 is fixedly installed at the end of the one-way valve 31 away from the hollow tube 8. A venting cavity 33 is opened inside the pressure roller 9. A conical cavity 34 is opened on the side wall of the venting cavity 33. Four sets of air guide ribs 35 are fixedly installed in a circumferential array on the inner wall of the venting cavity 33. Several sets of air outlet holes 36 are opened between two adjacent sets of air guide ribs 35. The protective structure 3 also includes a guide groove 37 opened on the side wall of the conical cavity 34. The inner wall of the guide channel 37 is fixedly installed with several sets of protrusions 38 in an array. The guide channel 37 has four sets. The four sets of guide channels 37 are distributed in a circumferential array on the inner wall of the conical cavity 34. The end of the conical cavity 34 away from the ventilation cavity 33 is in communication with the interior of the hollow tube 8. The hot air box 10 is fixedly installed on the side wall of the placement frame 1. The end of the ventilation pipe 32 away from the one-way valve 31 is fixedly connected to the side wall of the hot air box 10. The guide channel 37 is set in a spiral shape and is connected to the ventilation cavity 33.

[0025] In the embodiments of this utility model, the placement rack 1 serves as the supporting foundation for the entire equipment. It is made of high-strength metal material, has a stable structure, and has good load-bearing capacity. Inside, there is a laminating groove 2 that is adapted to the size of the self-adhesive label substrate. The inner wall of the laminating groove 2 is smooth and flat, which can avoid scratching damage to the surface of the label substrate and provide a stable working space for the laminating process. The laminating mechanism 5 is the prior art disclosed in the original application and will not be described in detail here. The roll mechanism 6 is an existing mature mechanism, including an unwinding roller, a rewinding roller, and a drive assembly. It is used to realize the continuous conveying of the self-adhesive label substrate and the rewinding of the finished product after lamination. The conveying speed can be adjusted according to the processing requirements to ensure the continuity of the laminating process.

[0026] Two sets of opposing fixing plates 7 are bolted to the side wall of the placement frame 1. The two sets of fixing plates 7 are parallel and symmetrically distributed, providing stable support for the installation of the pressure roller 9. A rotating rod is rotatably connected to one set of fixing plates 7 through the side wall and through a bearing. The bearing reduces the frictional resistance when the rotating rod rotates, ensuring smooth rotation. A hollow tube 8 is rotatably connected to the other set of fixing plates 7 through the side wall and through a bearing. The hollow tube 8 is made of high-temperature and corrosion-resistant tubing and has a hollow internal structure, serving as a channel for hot air delivery. The pressure roller 9 is fixedly installed at the end of the rotating rod and the hollow tube 8 that are close to each other by welding or bolting. The pressure roller 9 has a cylindrical structure, a smooth surface, and a certain degree of hardness and wear resistance, which can apply uniform pressure to the film material and substrate when rotating.

[0027] The motor 15 is a servo motor, which has the characteristic of stable speed. The output shaft of the motor 15 is fixedly connected to the end of the rotating rod through a coupling, which can drive the rotating rod to drive the pressure roller 9 to rotate synchronously. The protective structure 3 includes a one-way valve 31 rotatably connected to the end of the hollow tube 8 through a rotary joint. The rotary joint adopts an industrial-grade rotary joint with good sealing performance, which can realize the relative movement between the rotation of the hollow tube 8 and the stationary one-way valve 31, while ensuring that the air circuit is sealed and leak-proof. The one-way valve 31 can prevent hot air backflow and ensure that hot air is delivered to the inside of the pressure roller 9 in one direction. The end of the one-way valve 31 away from the hollow tube 8 is fixedly installed with a vent pipe 32 through a flange or clamp. The vent pipe 32 is a flexible or rigid pipe with good heat resistance, which is used to connect the hot air box 10 and the one-way valve 31 to achieve stable delivery of hot air.

[0028] The pressure roller 9 has an annular ventilation cavity 33 inside, which is distributed around the axis of the pressure roller 9 to provide space for the temporary storage and diversion of hot air. The side wall of the ventilation cavity 33 has a conical cavity 34. The large diameter end of the conical cavity 34 is connected to the hollow tube 8, and the small diameter end is connected to the ventilation cavity 33, which can converge and guide the hot air. The inner wall of the ventilation cavity 33 has four sets of air guide ribs 35 welded and fixed in a circumferential array. The air guide ribs 35 are long strip metal plates that extend radially along the ventilation cavity 33. Several sets of air outlet holes 36 are opened between two adjacent sets of air guide ribs 35. The air outlet holes 36 are evenly distributed on the side wall of the pressure roller 9 and have the same hole size, which can make the hot air evenly discharged to the surface of the pressure roller 9. The inner wall of the guide groove 37 has several sets of protrusions 38 integrally formed or welded in an array. The protrusions 38 are hemispherical or rectangular structures, which can turbulentize the airflow.

[0029] Four sets of guide channels 37 are provided, and the four sets of guide channels 37 are distributed in a circumferential array on the inner wall of the conical cavity 34. Each set of guide channels 37 extends along the generatrix of the conical cavity 34 and is distributed in a spiral shape. The end of the conical cavity 34 away from the ventilation cavity 33 is in communication with the interior of the hollow tube 8, ensuring that hot air can smoothly enter the conical cavity 34 from the hollow tube 8. A hot air box 10 is fixedly installed on the side wall of the placement frame 1 by a bracket. The hot air box 10 is equipped with a heating element and a blower, which can generate hot air with a stable temperature and flow rate. The end of the ventilation pipe 32 away from the one-way valve 31 is fixedly connected to the side wall of the hot air box 10 and is internally interconnected, ensuring that the hot air can be delivered without leakage. The guide channels 37 are set in a spiral shape and are connected to the ventilation cavity 33, which can guide the hot air to form a spiral airflow and prolong the residence time of the hot air in the conical cavity 34.

[0030] Please continue reading. Figures 1-5The conical cavity 34 is provided with a guide structure 4. The guide structure 4 includes two sets of clamping plates 41 fixedly installed on the inner wall of the conical cavity 34. The ends of the two sets of clamping plates 41 are fixedly connected to a clamping rod 42. The inner wall of the clamping rod 42 is provided with an annular groove. An elastic gasket 43 is fixedly installed on the inner wall of the annular groove. A sleeve 44 is sleeved on the surface of the clamping rod 42. A guide vane 45 is fixedly installed on the side wall of the sleeve 44. The guide structure 4 is provided with four sets. The four sets of guide structures 4 are distributed in a circumferential array on the inner wall of the conical cavity 34.

[0031] In this embodiment of the invention, two sets of clamping plates 41 are symmetrically distributed to provide fixed support for the clamping rod 42. The ends of the two sets of clamping plates 41 are welded together to the clamping rod 42. The clamping rod 42 is a cylindrical rod body, arranged along the axial direction of the conical cavity 34. An annular groove is opened on the inner wall of the clamping rod 42, and an elastic gasket 43 is bonded to the inner wall of the annular groove. The elastic gasket 43 is made of high-temperature resistant rubber material and has good elasticity and buffering performance. A sleeve 44 is movably sleeved on the surface of the clamping rod 42. The sleeve 44 can rotate flexibly around the clamping rod 42. A guide vane 45 is welded and fixedly installed on the side wall of the sleeve 44. The guide vane 45 is an arc-shaped blade with a certain degree of elasticity and rigidity. It can adjust its angle under the action of airflow. The core function of the guide structure 4 is to adaptively adjust the airflow guidance state according to the size of the hot air force, so as to realize the dynamic adaptation and uniformity of hot air delivery. The movable sleeve of the sleeve 44 and the clamping rod 42 allows the guide vane 45 to have the freedom of flexible rotation.

[0032] When the hot air force is low, the guide vane 45 rotates slowly under the thrust of the airflow, opening gently to reduce airflow resistance and ensure that the hot air can pass smoothly and converge into the ventilation chamber 33. When the hot air force increases, the impact of the airflow on the guide vane 45 increases, pushing the guide vane 45 to rotate further and opening at a larger angle. This can divert some airflow and slow down the local flow velocity, avoiding airflow turbulence or disturbance caused by excessive wind force. When the hot air force weakens or stops, the elastic pad 43 will generate a reset force by its own elastic deformation, pushing the sleeve 44 to rotate around the locking rod 42, causing the guide vane 45 to automatically return to the initial state, preparing for the next airflow adjustment.

[0033] During operation, the self-adhesive label substrate to be laminated is first conveyed to the laminating groove 2 of the placement rack 1 via the roll mechanism 6. Simultaneously, the laminating mechanism 5 conveys the film material above the substrate, completing the initial alignment of the film material and the substrate. At this time, the motor 15 is started, and the output shaft of the motor 15 drives the rotating rod to rotate. The rotating rod synchronously drives the pressure roller 9 and the hollow tube 8 to rotate, and the hot air box 10 is started simultaneously. The hot air generated by the hot air box 10 is delivered to the one-way valve 31 through the ventilation pipe 32. After passing through the one-way valve 31, the hot air is unidirectionally introduced into the hollow tube 8. After entering the conical cavity 34 from the hollow tube 8, the hot air flows through the four sets of spiral guide grooves 37. Under the guidance of the airflow, a stable spiral airflow is formed. The protrusions 38 on the inner wall of the guide groove 37 turbulent the airflow. At the same time, the four sets of guide vanes 45 in the conical cavity 34 flexibly adjust their angles under the impact of the airflow to guide the hot air in a secondary manner, ensuring that the hot air flows smoothly into the ventilation cavity 33. The hot air entering the ventilation cavity 33 is evenly dispersed to the area between adjacent guide vanes 35 under the diversion effect of the four sets of air guide ribs 35. Finally, it is evenly discharged to the surface of the pressure roller 9 through several sets of air outlets 36 for uniform heating. After the heated substrate is moved into the coating tank 2, the coating mechanism 5 is started to perform the coating work.

[0034] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An automatic laminating device for self-adhesive labels, comprising a placement rack (1), wherein a laminating groove (2) is provided inside the placement rack (1), a laminating mechanism (5) is provided on the side wall of the placement rack (1), and a roll-up mechanism (6) is provided on the side wall of the placement rack (1), characterized in that: The placement rack (1) has two sets of fixing plates (7) fixedly installed on its side wall. One set of fixing plates (7) has a rotating rod rotatably connected through the side wall and bearings. The other set of fixing plates (7) has a hollow tube (8) rotatably connected through the side wall and bearings. The rotating rod and the hollow tube (8) are fixedly installed with a pressure roller (9) at their close ends. A motor (15) is fixedly installed on the side wall of the fixing plate (7). The output shaft of the motor (15) is fixedly connected to the end of the rotating rod. The pressure roller (9) has a protective structure (3) inside. The protective structure (3) includes a one-way valve (31) rotatably connected to the end of the hollow tube (8) via a rotary joint. A vent pipe (32) is fixedly installed at the end of the one-way valve (31) away from the hollow tube (8). A venting chamber (33) is provided inside the pressure roller (9). A conical cavity (34) is provided on the side wall of the venting chamber (33). Four sets of air guide ribs (35) are fixedly installed on the inner wall of the venting chamber (33) in a circumferential array. Several sets of air outlet holes (36) are provided between two adjacent sets of air guide ribs (35).

2. The automatic laminating equipment for self-adhesive labels according to claim 1, characterized in that: The protective structure (3) also includes a flow guide groove (37) opened on the side wall of the conical cavity (34), and the inner wall of the flow guide groove (37) is fixedly installed with a number of protrusions (38) in an array.

3. The automatic laminating equipment for self-adhesive labels according to claim 2, characterized in that: The guide groove (37) has four sets, and the four sets of guide grooves (37) are distributed in a circumferential array on the inner wall of the conical cavity (34).

4. The automatic laminating equipment for self-adhesive labels according to claim 1, characterized in that: The end of the conical cavity (34) away from the ventilation cavity (33) is in communication with the interior of the hollow tube (8). A hot air box (10) is fixedly installed on the side wall of the placement rack (1). The end of the ventilation pipe (32) away from the one-way valve (31) is fixedly connected to the side wall of the hot air box (10).

5. The automatic laminating equipment for self-adhesive labels according to claim 3, characterized in that: The guide channel (37) is spiral-shaped and is connected to the ventilation cavity (33).

6. The automatic laminating equipment for self-adhesive labels according to claim 1, characterized in that: The conical cavity (34) is provided with a guide structure (4). The guide structure (4) includes two sets of clamping plates (41) fixedly installed on the inner wall of the conical cavity (34). The ends of the two sets of clamping plates (41) are fixedly connected to a clamping rod (42). The inner wall of the clamping rod (42) is provided with an annular groove. An elastic gasket (43) is fixedly installed on the inner wall of the annular groove. A sleeve (44) is sleeved on the surface of the clamping rod (42). A guide vane (45) is fixedly installed on the side wall of the sleeve (44).

7. The automatic laminating equipment for self-adhesive labels according to claim 6, characterized in that: The guide structure (4) is provided in four sets, and the four sets of guide structures (4) are distributed in a circular array on the inner wall of the conical cavity (34).

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