Automatic labeling device for food packaging bottles

Abstract

The invention discloses an automatic food packaging bottle labeling device, and belongs to the technical field of automatic food packaging equipment.The automatic food packaging bottle labeling device comprises a first base, a second base and a linear conveying belt connecting the first base and the second base, a label stripping mechanism and a temperature control mechanism are arranged on the first base, and label stripping and bottom paper recycling are achieved through the label stripping mechanism; the label backing paper is heated through a heating roller, the tensioning force and the stripping angle are adjusted, a label backing paper height limiting mechanism is arranged on the edge of the first base, and the backing paper conveying height is controlled through an upper limiting pressing plate and a lower limiting pressing plate. A driving unit and a driven abutting unit which are symmetrical are arranged on the linear conveying belt and used for driving packaging bottles to rotate and clamping and positioning correspondingly, and an infrared thermal imaging monitor is installed on the edge of the second base, monitors the temperature gradient of bottle bodies in real time and is in linkage with a temperature control mechanism to control heating parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of food packaging automation equipment, and in particular to an automatic labeling device for food packaging bottles, which is suitable for precise labeling and temperature-adaptive labeling operations on food packaging bottles. Background Art

[0002] In the food packaging industry, labeling is one of the key processes in product packaging, and its quality directly affects the product's appearance and information transmission effect. Traditional labeling devices have the following problems: 1. Labeling defects in low temperature environments: At night or in low temperature environments, the adhesive activity is insufficient when the label is attached to the bottle due to the low temperature, resulting in label warping, falling off, etc., affecting the packaging quality.

[0003] 2. Poor label conveying stability: Traditional devices lack a dynamic adjustment mechanism for the tensioning force and peeling angle of the label backing paper, which can easily cause the label to deflect and wrinkle during conveying, affecting the labeling accuracy.

[0004] 3. Insufficient bottle positioning and rotation control: If the bottle is not firmly positioned or rotated smoothly during the labeling process, it will cause deviation in the label fitting position, especially the circumferential labeling of cylindrical bottles, which requires extremely high rotation synchronization.

[0005] 4. Low degree of automation and compatibility: Existing equipment is difficult to automate the entire process of label peeling, heating, conveying, bottle positioning and post-labeling inspection, and has poor adaptability to bottles of different specifications, requiring frequent manual adjustments.

[0006] In response to the above problems, the present invention provides an automatic labeling device for food packaging bottles that integrates temperature control, dynamic tensioning, precise positioning and automatic control to improve labeling quality and production efficiency. Summary of the Invention

[0007] 1. Technical problems to be solved: In response to the problems existing in the prior art, the purpose of the present invention is to provide an automatic labeling device for food packaging bottles, which can heat the label base paper and dynamically adjust the tension and peeling angle through a temperature control mechanism, use the label base paper height limiting mechanism to ensure the conveying accuracy, and use symmetrically arranged driving and tightening units to achieve precise clamping and rotation of the packaging bottle. At the same time, the entire process is controlled by an infrared thermal imaging monitor, thereby improving the labeling reliability in low-temperature environments, ensuring the labeling position accuracy, improving production efficiency and enhancing the equipment's compatibility with bottles of different specifications.

[0008] 2. Technical solution: To solve the above problems, the present invention adopts the following technical solutions.

[0009] An automatic labeling device for food packaging bottles includes a first base and a second base, which are connected by a horizontally arranged linear conveyor belt. The top surface of the first base is provided with a label peeling mechanism and a temperature control mechanism: The label peeling mechanism includes a label input path and a bottom paper recovery path arranged in parallel; The temperature control mechanism includes a heating roller assembly in contact with the label base paper, and a linear drive structure for driving the heating roller assembly to move along the conveying direction of the label base paper; The first base is provided with a label bottom paper height limiting mechanism near the edge of the linear conveyor belt, including a limiting pressure plate assembly arranged symmetrically up and down; A bottle clamping and rotating mechanism is provided above the linear conveyor belt, comprising an active driving unit located on the first base side and a driven pressing unit located on the second base side, with their axes aligned; An infrared thermal imaging monitor is installed on the edge of the second base, opposite to the label base paper height limiting mechanism.

[0010] A further improvement is that the label input path of the label peeling mechanism includes: The first winding roller is used to install the label roll and is fixed to the left side of the top surface of the first base through the bearing seat; Two staggered first guide roller groups and a second guide roller are sequentially arranged on the right side of the first winding roller, and the guide roller group is rotatably connected to the first base through a bracket; Liner paper recycling paths include: A second winding roller is arranged parallel to the first winding roller and is fixed to the lower left side of the top surface of the first base through a bracket; Two staggered third winding roller groups are arranged in sequence on the right side of the second winding roller. The outlet end of the third winding roller group is fixed with a trapezoidal guide block through a bracket. The trapezoidal guide block is located directly below the second guide roller, and a label backing paper peeling channel is formed between the two.

[0011] A further improvement is that the temperature control mechanism includes: A linear slide is provided in the middle of the top surface of the first base, and the linear slide extends along the conveying direction of the label base paper; A concave connecting frame is slidably connected to the linear slide, the side of the connecting frame is fixed with an electric push rod by bolts, and the other end of the electric push rod is fixedly connected to the top surface of the first base through a fixing plate to form the linear drive structure; The bottom inner side of the connecting frame is rotatably connected to the heating roller via a rotary joint. The heating roller is embedded with an electric heating wire and is covered with an elastic roller cover made of silicone material on the outside. The controller is fixed to the inner wall of the connecting frame by bolts, and a temperature sensor is installed on the top through a bracket. The signal line of the controller is led out through a wire groove opened at the bottom of the connecting frame, and is electrically connected to the electric heating wire through the internal channel of the rotary joint. The temperature sensor is connected to the infrared thermal imaging monitor through a wireless module.

[0012] A further improvement is that the label base paper height limiting mechanism includes: An I-shaped bracket fixed to the edge of the top surface of the first base, wherein the center plate of the I-shaped bracket is perpendicular to the feeding direction of the label backing paper and has two symmetrical rectangular limiting holes; The limiting slide is slidably connected in the rectangular limiting hole, and a threaded hole is provided on the top surface of the limiting slide. The threaded hole cooperates with a threaded transmission rod that passes through the top and bottom of the I-shaped bracket, and the top end of the threaded transmission rod is fixedly connected to the output shaft of the servo motor at the top of the I-shaped bracket through a coupling; The other end of the limiting slide is fixed to the limiting pressing plate by a bolt, and the opposite surfaces of the two limiting pressing plates are parallel to form an upper and lower clamping channel for the label base paper.

[0013] A further improvement is that the active drive unit includes: An L-shaped support frame is fixed to the right side of the top surface of the first base, and the inner side wall of the support frame is rotatably connected to the driving rubber roller through a bearing, and the axis of the driving rubber roller is perpendicular to the conveying direction of the linear conveyor belt; The first motor is fixed on the top of the support frame through a motor seat, and the output shaft of the first motor is connected to the driving rubber roller through a synchronous belt.

[0014] A further improvement is that the driven pressing unit includes: An electric telescopic rod fixed to the right side of the top surface of the second base, wherein the telescopic end of the electric telescopic rod is fixed to the U-shaped support through a flange; The front end of the U-shaped support is rotatably connected to two symmetrical driven rubber rollers through a rotating shaft. The axes of the driven rubber rollers are coplanar and parallel to the axes of the driving rubber rollers, and the distance between the two is adjusted by an electric telescopic rod.

[0015] A further improvement is that the heating roller adjusts the pressing force on the label base paper by the extension and contraction of the electric push rod, the temperature sensor collects the surface temperature of the label base paper in real time and transmits it to the controller, and the controller adjusts the power output of the electric heating wire through a PWM signal.

[0016] A further improvement is that the driving motor of the linear conveyor belt and the driving motor of the first winding roller of the label peeling mechanism are connected through a synchronous controller to achieve dynamic matching of the conveying speed and the label peeling speed.

[0017] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: (1) Temperature-controlled labeling to prevent edge warping: The temperature control mechanism heats the label backing paper through an electric heating wire, and cooperates with the infrared thermal imaging monitor to provide real-time feedback on the bottle body temperature, ensuring that the adhesive is fully activated when the label is attached to the bottle body in a low-temperature environment, effectively solving the edge warping problem and improving labeling reliability.

[0018] (2) High dynamic adjustment precision: The electric push rod drives the heating roller to move along the linear slide, which can dynamically adjust the tension and peeling angle of the label base paper. At the same time, the limit mechanism drives the threaded transmission rod through the servo motor to adjust the spacing of the limit pressure plate to adapt to the stable transportation of label base paper of different widths.

[0019] (3) Fully automated operation: From the peeling of label rolls and the recycling of the base paper to the clamping, rotation and labeling of packaging bottles, all processes are automatically controlled through driving elements such as motors and electric push rods, reducing manual intervention.

[0020] (4) Strong compatibility and stability: The active drive unit and the driven pressing unit cooperate to adapt to cylindrical packaging bottles of different diameters. The distance between the driven rubber rollers can be adjusted by the electric telescopic rod to achieve rapid changeover.

[0021] It should be noted that the structures not introduced in the present invention are the same as those in the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 This is a structural diagram of the label peeling mechanism of the present invention; Figure 3 Schematic diagram of the structure of the temperature control mechanism of the present invention; Figure 4 This is a structural diagram of the label base paper height limiting mechanism of the present invention; Figure 5 It is a structural schematic diagram of the active driving unit and the driven pressing unit of the present invention.

[0023] Description of the numbers in the figure: 1. First base; 2. Linear conveyor belt; 3. Second base; 4. Label peeling mechanism; 41. First winding roller; 42. First guide roller group; 43. Second guide roller; 44. Trapezoidal guide block; 45. Third winding roller group; 46. Second winding roller; 5. Temperature control mechanism; 51. Linear slide; 52. Concave connecting frame; 53. Electric push rod; 54. Rotary joint; 55. Heating roller; 56. Electric heating wire; 57. Controller; 58. Temperature sensor; 59. Wire trough; 510. Elastic roller cover; 6. Label base paper height limit mechanism; 61. I-shaped bracket; 62. Rectangular limit hole; 63. Limit slide; 64. Threaded hole; 65. Threaded transmission rod; 66. Servo motor; 67. Limit pressure plate; 71. Active drive unit; 711. L-shaped support frame; 712. Driving rubber roller; 713. First motor; 72. Driven tightening unit; 721. Electric telescopic rod; 722. U-shaped support; 723. Driven rubber roller; 8. Infrared thermal imaging monitor. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0025] 1. Component installation relationship 1. Assembly of base and conveyor belt The first base 1 and the second base 3 are fixed to the horizontal ground through anchor bolts or supports. The distance between the two is adjusted according to the layout of the production line. The linear conveyor belt 2 is installed between the two bases through a bracket to ensure smooth transportation of the packaging bottles.

[0026] 2. Installation of label peeling mechanism 4 The first winding roller 41 is fixed to the left side of the top surface of the first base 1 through a bearing seat and is used to load the label roll (label with liner); Two staggered first guide roller groups 42 and second guide rollers 43 are sequentially installed on the right side of the first winding roller 41 through brackets, and the axes of the guide rollers are perpendicular to the label conveying direction to form a label input path; The second winding roller 46 is installed parallel to and below the first winding roller 41 and is connected to the drive motor via gears; The third winding roller group 45 (active winding roller + driven pressure roller) is installed on the right side of the second winding roller 46. The outlet end is fixed with a trapezoidal guide block 44 through a bracket. The guide block is located directly below the second guide roller 43. The distance between the two is 1.2 times the thickness of the label backing paper, forming a label peeling channel.

[0027] 3. Installation of temperature control mechanism 5 The linear slide 51 is provided in the middle of the top surface of the first base 1 and extends along the conveying direction of the label base paper; The concave connecting frame 52 is slidably connected to the linear slide 51 through a slider, and the electric push rod 53 is fixed to the side by bolts. The other end of the electric push rod is fixed to the left side of the first base 1 through a fixing plate to form a horizontal drive structure; The heating roller 55 is mounted on the inner bottom of the connecting frame 52 through a rotary joint 54 and can rotate freely. The internal electric heating wire 56 is connected to the controller 57 through a wire groove 59 and the rotary joint 54; The temperature sensor 58 is installed on the top of the connecting frame 52, facing the surface of the label base paper, and communicates with the infrared thermal imaging monitor 8 through a wireless module.

[0028] 4. Installation of label bottom paper height limit mechanism 6 The I-shaped bracket 61 is fixed to the first base 1 near the edge of the conveyor belt. The center plate is perpendicular to the conveying direction of the label backing paper and has two symmetrical rectangular limiting holes 62. The limiting slide 63 is embedded in the rectangular limiting hole 62, and the threaded hole 64 on the top surface cooperates with the threaded transmission rod 65. The top end of the threaded transmission rod is connected to the servo motor 66 through a coupling, and the bottom end is fixed to the bottom of the bracket through a bearing; The limiting pressure plate 67 is fixed to the other end of the limiting slide plate 63 by bolts, and the distance between the two pressure plates is initially set to twice the thickness of the label base paper.

[0029] 5. Installation of bottle clamping and rotating mechanism The L-shaped support frame 711 of the active drive unit 71 is fixed to the right side of the first base 1. The driving rubber roller 712 is installed on the inner side of the support frame through a bearing. The axis is perpendicular to the conveying direction of the conveyor belt and is driven by the top first motor 713 through a synchronous belt. The electric telescopic rod 721 of the driven pressing unit 72 is fixed to the right side of the second base 3, and the telescopic end is connected to the U-shaped support 722 through a flange. The two driven rubber rollers 723 are symmetrically installed at the front end of the support, and the axis is coplanar and parallel to the driving rubber roller 712.

[0030] Infrared thermal imaging monitor 8 installation Fixed on the edge of the second base 3, the lens faces above the conveyor belt and is opposite to the label bottom paper height limiting mechanism 6. The monitoring range covers the labeling area of the packaging bottle.

[0031] 2. Operation steps and process 1. Preparation Label loading: The label roll is mounted on the first winding roller 41. The label backing paper passes through the first guide roller group 42 and the second guide roller 43 in sequence. After the label is peeled off by the trapezoidal guide block 44, the backing paper enters the recovery path of the third winding roller group 45 and the second winding roller 46. Bottle shape adjustment: According to the diameter of the packaging bottle, the electric telescopic rod 721 is used to adjust the distance between the driven rubber roller 723 and the driving rubber roller 712 so that the two can lightly touch the bottle body; Limit adjustment: The servo motor 66 drives the threaded transmission rod 65 to rotate, and adjusts the spacing of the limit pressure plate 67 to be slightly larger than the thickness of the label bottom paper to ensure that the bottom paper passes smoothly.

[0032] 2. Automated labeling process Label peeling and heating: The first winding roller 41 releases the label roll under the drive motor, and the base paper is transported to the trapezoidal guide block 44 through the guide roller group. The label is separated from the base paper due to the inclined surface of the guide block and attached to the bottle body at the position to be labeled; The electric push rod 53 pushes the heating roller 55 against the bottom paper, and the electric heating wire 56 heats the bottom paper to a preset temperature of 40-60°C. The temperature sensor 58 collects the bottom paper temperature in real time, and the controller 57 dynamically adjusts the heating power according to the bottle body temperature feedback from the infrared thermal imaging monitor 8.

[0033] Bottle gripping and rotation: The packaging bottle is transported to the clamping area by the linear conveyor belt 2. The driven rubber roller 723 is pressed against the bottle body under the action of the electric telescopic rod 721. The driving rubber roller 712 is rotated by the first motor 713, and the friction force drives the bottle body to rotate circumferentially to achieve circumferential label bonding.

[0034] Bottom paper recycling and testing: The peeled backing paper is tensioned and recovered by the third winding roller group 45 and the second winding roller 46, and the gear transmission ensures smooth winding; The infrared thermal imaging monitor 8 scans the temperature distribution of the bottle body in real time to determine whether the temperature of the label bonding area meets the bonding requirements, and triggers an alarm when an abnormality occurs.

[0035] 3. Model change and maintenance When changing labels of different specifications, the spacing between the limit pressing plates 67 is adjusted by the servo motor 66, or the position of the heating roller 55 is adjusted by the electric push rod 53 to adapt to different peeling angles; Clean the surface stains of the guide roller regularly and check the connection stability of the electric heating wire 56 and the sensor 58.

[0036] The above-mentioned embodiments only express a certain implementation method of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be based on the attached claims.

Claims

1. An automatic labeling device for food packaging bottles, comprising a first base (1) and a second base (3), the two being connected by a horizontally arranged linear conveyor belt (2), characterized in that: The top surface of the first base (1) is provided with a label peeling mechanism (4) and a temperature control mechanism (5): The label peeling mechanism (4) comprises a label input path and a bottom paper recovery path arranged in parallel; The temperature control mechanism (5) comprises a heating roller assembly in contact with the label base paper, and a linear drive structure for driving the heating roller assembly to move along the conveying direction of the label base paper; The first base (1) is provided with a label base paper height limiting mechanism (6) near the edge of the linear conveyor belt (2), comprising a limiting pressure plate assembly symmetrically arranged in the upper and lower parts; A bottle clamping and rotating mechanism is provided above the linear conveyor belt (2), comprising an active driving unit (71) located on the first base (1) side and a driven pressing unit (72) located on the second base (3) side, with their axes aligned; An infrared thermal imaging monitor (8) is mounted on the edge of the second base (3) and is opposite to the label base paper height limiting mechanism (6).

2. The automatic labeling device for food packaging bottles according to claim 1, characterized in that: The label input path of the label peeling mechanism (4) includes: A first winding roller (41) is used for mounting a label roll and is fixed to the left side of the top surface of the first base (1) via a bearing seat; Two staggered first guide roller groups (42) and a second guide roller (43) are sequentially arranged on the right side of the first winding roller (41), and the guide roller groups are rotatably connected to the first base (1) via a bracket; Liner paper recycling paths include: A second winding roller (46) arranged parallel to the first winding roller (41) is fixed to the lower left side of the top surface of the first base (1) via a bracket; Two staggered third winding roller groups (45) are sequentially arranged on the right side of the second winding roller (46), the third winding roller group (45) comprising an active winding roller and a driven pressing roller, a trapezoidal guide block (44) is fixed to the outlet end of the third winding roller group (45) through a bracket, the trapezoidal guide block (44) is located directly below the second guide roller (43), and a label backing paper peeling channel is formed between the two.

3. The automatic labeling device for food packaging bottles according to claim 1, characterized in that: The temperature control mechanism (5) comprises: A linear slide groove (51) is provided in the middle of the top surface of the first base (1), wherein the linear slide groove (51) extends along the conveying direction of the label base paper; A concave connecting frame (52) is slidably connected to the linear slide groove (51), and an electric push rod (53) is fixed to the side of the connecting frame (52) by bolts, and the other end of the electric push rod (53) is fixedly connected to the top surface of the first base (1) through a fixing plate to form the linear drive structure; The bottom of the inner side of the connecting frame (52) is rotatably connected to the heating roller (55) via a rotary joint (54); the heating roller (55) has an electric heating wire (56) embedded inside and an elastic roller cover (510) made of silicone material on the outside; The controller (57) is fixed to the inner wall of the connecting frame (52) by bolts, and a temperature sensor (58) is installed on the top through a bracket. The signal line of the controller (57) is led out through a wire groove (59) opened at the bottom of the connecting frame (52) and is electrically connected to the electric heating wire (56) through the internal channel of the rotary joint (54). The temperature sensor (58) is connected to the infrared thermal imaging monitor (8) through a wireless module communication.

4. The automatic labeling device for food packaging bottles according to claim 1, characterized in that: The label base paper height limiting mechanism (6) comprises: An I-shaped bracket (61) fixed to the edge of the top surface of the first base (1), wherein the center plate of the I-shaped bracket (61) is perpendicular to the conveying direction of the label base paper and is provided with two symmetrical rectangular limiting holes (62); The rectangular limiting hole (62) is slidably connected to the limiting slide (63), and the top surface of the limiting slide (63) is provided with a threaded hole (64). The threaded hole (64) cooperates with a threaded transmission rod (65) that passes through the top and bottom of the I-shaped bracket (61). The top end of the threaded transmission rod (65) is fixedly connected to the output shaft of the servo motor (66) at the top of the I-shaped bracket (61) through a coupling. The other end of the limiting slide plate (63) is fixed to the limiting pressing plate (67) by a bolt, and the opposite surfaces of the two limiting pressing plates (67) are parallel to each other, forming an upper and lower clamping channel for the label base paper.

5. The automatic labeling device for food packaging bottles according to claim 1, characterized in that: The active drive unit (71) comprises: An L-shaped support frame (711) is fixed to the right side of the top surface of the first base (1), wherein the inner side wall of the support frame (711) is rotatably connected to a driving rubber roller (712) via a bearing, and the axis of the driving rubber roller (712) is perpendicular to the conveying direction of the linear conveyor belt (2); The top of the support frame (711) is fixed with a first motor (713) via a motor seat, and an output shaft of the first motor (713) is connected to a driving rubber roller (712) via a synchronous belt.

6. The automatic labeling device for food packaging bottles according to claim 1, characterized in that: The driven pressing unit (72) comprises: An electric telescopic rod (721) is fixed to the right side of the top surface of the second base (3), and the telescopic end of the electric telescopic rod (721) is fixed to a U-shaped support (722) via a flange; The front end of the U-shaped support (722) is rotatably connected to two symmetrical driven rubber rollers (723) via a rotating shaft. The axes of the driven rubber rollers (723) are coplanar and parallel to the axes of the driving rubber rollers (712). The distance between the two is adjusted by an electric telescopic rod (721).

7. The automatic labeling device for food packaging bottles according to claim 3, characterized in that: The heating roller (55) adjusts the pressing force on the label base paper by the extension and contraction of the electric push rod (53), and the temperature sensor (58) collects the surface temperature of the label base paper in real time and transmits it to the controller (57). The controller (57) adjusts the power output of the electric heating wire (56) through the PWM signal.

8. The automatic labeling device for food packaging bottles according to any one of claims 1 to 7, characterized in that: The driving motor of the linear conveyor belt (2) and the driving motor of the first winding roller (41) of the label peeling mechanism (4) are connected via a synchronous controller to achieve dynamic matching of the conveying speed and the label peeling speed.

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