Top film covering equipment for material packaging

Abstract

The utility model discloses top film covering equipment for material packaging, which belongs to the field of automatic packaging and film covering and comprises a lifting frame, a lifting mechanism is arranged in the lifting frame and connected with a horizontal film-drawing and film-covering mechanism, and the horizontal film-drawing and film-covering mechanism comprises a film frame arranged in the middle of the lifting frame. A film roll for rotationally unwinding a film raw material, a film tensioning assembly for tensioning a film, and a film pressing assembly and a film cutting assembly for realizing film breaking are arranged on the film frame, and one end, far away from the film roll, of the film frame is connected with a film pulling assembly for pulling out the film at a fixed length. The film laying device is suitable for materials of different heights, the film length can be pulled out according to the material length, the film pressing assembly is matched with the film cutting assembly to complete film and film roll separation and film laying, and operation is convenient. When the film roll is used up, an alarm is given to prompt manual film replacement, the lifting mechanism drives the lifting frame to descend to the operation height of personnel, the personnel penetrate out the end of the film to the in-place position of a pneumatic film clamping jaw of the film pulling assembly after the film roll is replaced, and operation is easy and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic packaging film covering, in particular to a top film covering device for material packaging. Background Art

[0002] Packaging is an important step after the completion of automated production. During product circulation, packaging can play a role in protecting, beautifying and promoting products, improving product competitiveness and promoting product sales. With the development of technology, more and more packaging equipment is used.

[0003] With the continuous subdivision of production processes, existing material packaging is classified into multiple specifications on the same production line to meet the usage needs of products in different fields. For example, in the photovoltaic industry, components are often classified according to standards such as efficiency, color, grade or material number, which correspondingly produces a variety of product length packaging specifications. In the existing automated packaging line, the packaging of materials of various lengths requires packaging consumables of different lengths, and the top lamination is completed manually. Because the product height exceeds 1.5 meters, personnel need to stand on the platforms on both sides of the automated production line to complete the laying, which poses certain safety risks and occupies two staff members, which does not meet the needs of cost reduction and efficiency improvement.

[0004] To improve packaging efficiency, automatic laminating machines are used for material packaging. Automatic laminating machines occupy a small footprint and automatically release or stretch film rolls to a specific length based on demand, accommodating a wide range of cargo lengths. Existing automatic laminating equipment on the market mostly uses a motor to drive the film roll for automatic film release. When the film roll is first replaced, the roll's weight and friction are leveraged to customize the film length by rotating the roll a certain number of times. However, as the film roll ages, it becomes lighter, and the friction from its weight becomes insufficient, leading to a certain degree of slippage. Accurate film length customization can no longer be achieved with just a few rotations.

[0005] One type of existing automatic laminating machine uses an air-expanding shaft to fix the film roll, and a motor drives the air-expanding shaft to rotate, and is combined with a rotary encoder and a film length detection photoelectric device. This can solve the above problems to a certain extent, but for the mixed production of materials of different lengths, the film length parameters need to be constantly adjusted, which significantly increases the cost and does not meet the requirements of automated applications.

[0006] There is another type of existing automatic laminating machine that uses a customized film roll with a paper core. The long axis passes through the paper core, and the film roll is driven by a motor to unwind. A film-taking mechanism, an active roller, a driven roller, a swing roller and other mechanisms are set on the side where the film roll is delivered. These mechanisms keep the film-unwinding speed and the film-taking speed relatively balanced, allowing customization of films of different lengths. However, the operation is complicated, and it is difficult for customers to thread the film after replacing it, so it cannot be widely promoted and applied. Utility Model Content

[0007] The purpose of the utility model is to provide a top film covering device for material packaging. The device drives the horizontal film-pulling and laminating mechanism to adjust to the material laminating height through a lifting mechanism. The device is suitable for materials of different heights. The pneumatic film clamping claws of the film-pulling assembly can clamp the film and pull the film out to the length of the material. The film pressing assembly presses the film. The film cutting assembly separates the film from the film roll and completes the film laying. The device is easy to operate. When the film roll is exhausted, an alarm prompts manual film replacement. The lifting mechanism drives the lifting frame down to the operating height of the personnel. After replacing the film roll, the personnel pass the film end through the pneumatic clamping claws of the film-pulling assembly into place. The operation is simple and quick.

[0008] To achieve the above-mentioned purpose, the utility model provides a top film covering device for material packaging, including a lifting frame, a lifting mechanism is arranged in the lifting frame, the lifting mechanism is connected to a horizontal film pulling and covering mechanism, the horizontal film pulling and covering mechanism includes a film frame arranged in the middle of the lifting frame, the film frame is provided with a film roll for rotatably unwinding film raw material, a film tensioning assembly for tensioning the film, a film pressing assembly for fixing the film, and a film cutting assembly for cutting the film, and the end of the film frame away from the film roll is connected to a film pulling assembly for pulling the film to a fixed length.

[0009] Preferably, the lifting mechanism includes a lifting assembly and a guide assembly symmetrically arranged on both sides of the lifting frame, and the film frame is connected to the lifting frame through the lifting assembly and the guide assembly;

[0010] The lifting assembly includes sprocket 1 and sprocket 2 symmetrically arranged on both sides of the lifting frame. Sprocket 1 is arranged above sprocket 2. A chain is arranged on sprocket 1. One end of the chain passes around sprocket 1 and is connected to the top of the film frame. The other end of the chain passes around sprocket 2 and is connected to the bottom end of the film frame. A lifting motor is arranged on the lifting frame, and the output shaft of the lifting motor is connected to the center of sprocket 1.

[0011] Preferably, the guide assembly includes vertical guide grooves symmetrically arranged on the inner surfaces of both sides of the lifting frame, and the film frame is rotatably provided with guide wheels, which are arranged in the vertical guide grooves and rotate in the vertical guide grooves.

[0012] Preferably, the film tensioning assembly includes a tensioning roller 1 and a tensioning roller 2 arranged along the width direction of the film roll. The tensioning roller 1 is rotatably set on the film frame. One end of the film on the film roll passes around the tensioning roller 1 and passes through the upper end of the tensioning roller 2 and is connected to the film stretching mechanism. The tensioning roller 2 is rotatably set at one end of the tensioning frame. The other end of the tensioning frame is rotatably connected to the film frame. A tension spring is provided on the tensioning frame. One end of the tension spring is connected to the tension frame through a tension sensor, and the other end of the tension spring is connected to one end of the pull rod, and the other end of the pull rod is connected to the film frame.

[0013] Preferably, the film pressing assembly includes two groups of symmetrically arranged film pressing structures, the film pressing structures are arranged along the width direction of the film roll, the film pressing structure includes a film pressing cylinder hinged to the film frame, the cylinder rod of the film pressing cylinder is hinged to one end of the rotating frame, the other end of the rotating frame is rotatably connected to the lower end of the pressure plate, the middle of the rotating frame is rotatably connected to the film frame, the upper end of the pressure plate is rotatably connected to one end of the rotating frame, the other end of the rotating frame is rotatably connected to the film frame, a pressure block is provided at the bottom end of the pressure plate, and a fixed plate for supporting the film is provided below the pressure block of the film pressing structure.

[0014] Preferably, the film cutting assembly includes a rodless cylinder arranged between the two sets of film pressing structures, the rodless cylinder is arranged on the film frame, and the rodless cylinder is provided with a cutting knife running along the width direction of the film roll.

[0015] Preferably, a film-pulling fixing frame is connected to the end of the film frame away from the film roll, and the film-pulling assembly is arranged on the film-pulling fixing frame. The film-pulling assembly includes a frame arranged on the film-pulling fixing frame, and a mounting plate is arranged at the bottom end of the frame. The mounting plate is connected to the film-pulling fixing frame through a power structure and a sliding structure, and several groups of pneumatic film clamping claws for clamping the film are arranged on the end of the frame close to the film roll.

[0016] Preferably, the power structure includes a horizontal film-stretching servo motor, which is arranged on a mounting seat, which is arranged on a film frame, and the output shaft of the horizontal film-stretching servo motor is connected to a rotating rod through a synchronous belt transmission structure, and the rotating rod is rotatably arranged on a film-stretching fixed frame, and a rotating wheel 1 is arranged on the rotating rod, and a rotating wheel 2 is rotatably arranged on an end of the film-stretching fixed frame away from the rotating rod, and a pulling belt is arranged on the rotating wheel 1 and the rotating wheel 2, and one end of the pulling belt passes around the rotating wheel 1 and is connected to one end of the mounting plate, and the other end of the pulling belt passes around the rotating wheel 2 and is connected to the other end of the mounting plate;

[0017] The sliding structure comprises a sliding block arranged on the side of the mounting plate, a slide rail matched with the sliding block is arranged on the film-pulling fixing frame, and the sliding block is slidably connected to the slide rail.

[0018] Preferably, a film roll detection sensor for detecting whether there is a film obstruction is provided on the film frame, a film pulling detection sensor for judging the length of the film is provided on the mounting seat of the horizontal film pulling servo motor, and a material top sensing sensor for judging the lifting distance is provided on the end of the film pulling fixing frame away from the film roll.

[0019] Preferably, the pressing plate is provided with a plurality of through openings for the pneumatic film clamping jaws to pass through.

[0020] The utility model adopts a top film covering device for material packaging with the above structure, which drives the horizontal film pulling and covering mechanism to be adjusted to the material covering height through the lifting mechanism, which is suitable for materials of different heights. The pneumatic film clamping claws of the film pulling component penetrate into the opening of the pressure plate to clamp the end of the film, and the film length is pulled out according to the material length. The film pressing component presses the film, and the film cutting component completes the separation of the film and the film laying. The lifting mechanism drives the horizontal film pulling and covering mechanism to restore the initial position, which is easy to operate and is suitable for multi-specification material packaging and covering operations. After the film roll is exhausted, an alarm prompts manual film replacement, and the lifting mechanism drives the lifting frame to descend to the personnel operating height. After replacing the film roll, the personnel pass the film end out to the position where the pneumatic film clamping claws of the film pulling component are in place. The operation is simple and quick.

[0021] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 It is a front view of an embodiment of the utility model;

[0024] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0025] Figure 4 This is a schematic structural diagram of a film pulling assembly according to an embodiment of the present utility model;

[0026] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0027] Figure 6 for Figure 4 Enlarged schematic diagram at point C in the middle;

[0028] Figure 7 for Figure 4 Enlarged schematic diagram at point D in the middle.

[0029] Reference numerals

[0030] 100, horizontal film-pulling and laminating mechanism; 101, film rack; 102, lifting frame; 103, film roll;

[0031] 110. Film tensioning assembly; 111. Tensioning roller 1; 112. Tensioning roller 2; 113. Tensioning frame; 114. Tension spring; 115. Pull rod;

[0032] 120, film pressing assembly; 121, film pressing cylinder; 122, rotating frame; 123, pressing block; 124, fixed plate; 125, pressing plate; 126, rotating frame; 127, through opening;

[0033] 130. Film cutting assembly; 131. Rodless cylinder; 132. Cutting knife;

[0034] 140. Film-pulling assembly; 141. Film-pulling fixing frame; 142. Frame; 143. Mounting plate; 144. Pneumatic film-clamping jaws; 145. Horizontal film-pulling servo motor; 146. Mounting base; 147. Rotating rod; 148. Rotating wheel 1; 149. Rotating wheel 2; 1410. Pull belt; 1411. Sliding block; 1412. Slide rail; 1413. Film roll detection sensor; 1414. Film-pulling detection sensor; 1415. Material top sensing sensor;

[0035] 200. Lifting mechanism; 201. Sprocket 1; 202. Sprocket 2; 203. Chain; 204. Lifting motor; 205. Vertical guide groove; 206. Guide wheel. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages disclosed in the embodiments of the present invention clearer, the embodiments of the present invention are further described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. Examples of the embodiments are shown in the accompanying drawings, where the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0037] It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products or devices.

[0038] Like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0040] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0041] Example

[0042] like Figure 1 、 Figure 2 As shown, the utility model describes a top film covering device for material packaging, comprising a lifting frame 102, a lifting mechanism 200 is arranged in the lifting frame 102, the lifting mechanism 200 is connected to the horizontal film pulling and laminating mechanism 100, the horizontal film pulling and laminating mechanism 100 comprises a film frame 101 arranged in the middle of the lifting frame 102, the film frame 101 is provided with a film roll 103 for rotating and unwinding film raw material, a film tensioning assembly 110 for tensioning the film, a film pressing assembly 120 for fixing the film, and a film cutting assembly 130 for cutting the film, and the end of the film frame 101 away from the film roll 103 is connected to a film pulling assembly 140 for pulling the film to a fixed length.

[0043] The lifting mechanism 200 includes lifting assemblies and guide assemblies symmetrically arranged on either side of the lifting frame 102. The film frame 101 is connected to the lifting frame 102 via the lifting and guide assemblies. The lifting assembly includes sprocket 1 201 and sprocket 2 202 symmetrically arranged on either side of the lifting frame 102. Sprocket 1 201 is positioned above sprocket 202. A chain 203 is mounted on sprocket 1 201. One end of the chain 203 passes around sprocket 1 201 and connects to the top of the film frame 101. The other end of the chain 203 passes around sprocket 202 and connects to the bottom of the film frame 101. A lifting motor 204 is mounted on the lifting frame 102. The output shaft of the lifting motor 204 is connected to the center of sprocket 1 201. The guide assembly includes vertical guide slots 205 symmetrically arranged on the inner surfaces of both sides of the lifting frame 102. The film frame 101 is rotatably mounted with eight guide wheels 206, four on each side of the lifting frame 102. Each guide wheel 206 is positioned within and rotatably connected to the vertical guide slots 205. The output shaft of the lifting motor 204 rotates sprocket 1 201, which in turn drives the chain 203 along sprockets 1 201 and 202. Because the ends of the chain 203 are fixed to the film frame 101, they move the film frame 101 upward or downward, thereby raising and lowering the entire horizontal film-pulling and laminating mechanism 100. During the lifting and lowering process of the film frame 101, the guide wheels 206 rotate within the vertical guide slots 205. The horizontal film-pulling and laminating mechanism 100 vertically ascends to achieve a film-covered position for the material and a safe, avoidance position for material passage.

[0044] like Figure 3As shown, the film tensioning assembly 110 includes a tensioning roller 111 and a tensioning roller 112 arranged along the width of the film roll 103. The tensioning roller 111 is rotatably mounted on the film frame 101. One end of the film on the film roll 103 passes over the tensioning roller 111, passes through the upper end of the tensioning roller 112, and is then connected to the film tensioning mechanism. The tensioning roller 112 is rotatably mounted on one end of a tensioning frame 113, the other end of which is rotatably connected to the film frame 101. A tension spring 114 is mounted on the tensioning frame 113. One end of the tension spring 114 is connected to the tensioning frame 113 via a tension sensor. The other end of the tension spring 114 is connected to one end of a pull rod 115, the other end of which is connected to the film frame 101. Film roll 103 is loaded with consumables (film) for laminating the materials to be packaged. The entire roll 103 is manually placed within film holder 101, with the two ends of the roll 103 secured (the ends of the rotating shaft at the center of the roll 103 are rotatably connected to the film holder 101). One end of the film is threaded through the film press assembly 120 as required, allowing the film pull assembly 140 to remove the film and pull it horizontally to the required length. Tension springs 114 are installed at both ends of the film holder 101. These restraints keep the extended portion of the film roll 103 taut. When the film slackens, a tension sensor determines that the film is nearing exhaustion and that the weight of the roll 103 is insufficient to overcome the tension of the springs 114. A control platform connected to the tension sensor prompts the operator to replace the film roll 103.

[0045] like Figure 3 As shown, the film pressing assembly 120 includes two symmetrically arranged film pressing structures, arranged along the width of the film roll 103. The film pressing structure includes a film pressing cylinder 121 hinged to the film frame 101. The cylinder rod of the film pressing cylinder 121 is hinged to one end of a rotating frame 122. The other end of the rotating frame 122 is rotatably connected to the lower end of a pressure plate 125. The middle of the rotating frame 122 is rotatably connected to the film frame 101. The upper end of the pressure plate 125 is rotatably connected to one end of a rotating frame 126, and the other end of the rotating frame 126 is rotatably connected to the film frame 101. A pressure block 123 is provided at the bottom end of the pressure plate 125. Below the pressure block 123 of the film pressing structure is a fixed plate 124 for supporting the film. The film cutting assembly 130 includes a rodless cylinder 131 disposed between two sets of film pressing structures. The rodless cylinder 131 is disposed on the film frame 101 . A cutting knife 132 running along the width direction of the film roll 103 is disposed on the rodless cylinder 131 .

[0046] As the film pulling assembly 140 pulls the film, the two upper pressure blocks 123 are in the high position, meaning the film pressing cylinder 121 is retracted, allowing the film to pass freely. When the film reaches the required lamination length and is ready for cutting, the upper pressure blocks 123 on both sides of the film cutting assembly 130 are in the low position, meaning the film pressing cylinder 121 is extended, compressing the film and keeping it taut, facilitating cutting with the cutter 132. The film frame 101 is equipped with a protective cover. After cutting is complete, the cutter 132 retracts into the safe position within the cover to prevent accidental injury from penetrating the film or handling an abnormality.

[0047] like Figure 4 As shown, the end of the film frame 101 away from the film roll 103 is connected to a film-drawing fixed frame 141, and the film-drawing assembly 140 is arranged on the film-drawing fixed frame 141. The film-drawing assembly 140 includes a frame 142 arranged on the film-drawing fixed frame 141, and a mounting plate 143 is arranged at the bottom end of the frame 142. The mounting plate 143 is connected to the film-drawing fixed frame 141 through a power structure and a sliding structure. The end of the frame 142 close to the film roll 103 is provided with a plurality of groups of pneumatic film clamping claws 144 for clamping the film. Figure 5 、 Figure 6 、 Figure 7 As shown, the power structure includes a horizontal film-pulling servo motor 145, which is mounted on a mounting base 146, which is mounted on the film frame 101. The output shaft of the horizontal film-pulling servo motor 145 is connected to a rotating rod 147 via a synchronous belt drive structure. The rotating rod 147 is rotatably mounted on the film-pulling fixed frame 141. The rotating rod 147 is provided with a rotating wheel 148. The end of the film-pulling fixed frame 141 away from the rotating rod 147 is rotatably provided with a rotating wheel 2 149. The rotating wheels 148 and 149 are provided with a pull belt 1410. One end of the pull belt 1410 passes around the rotating wheel 148 and is connected to one end of the mounting plate 143. The other end of the pull belt 1410 passes around the rotating wheel 2 149 and is connected to the other end of the mounting plate 143. The sliding structure includes a sliding block 1411 arranged on the side of the mounting plate 143 , and a sliding rail 1412 adapted to the sliding block 1411 is provided on the film-pulling fixing frame 141 , and the sliding block 1411 is slidably connected to the sliding rail 1412 .

[0048] The synchronous belt structure utilizes an existing transmission structure, comprising a driving pulley mounted on the output shaft of a horizontal film-pulling servo motor 145. This driving pulley is connected to a driven pulley mounted on a rotating rod 147 via a synchronous belt, thereby driving the rotating rod 147 to rotate. The horizontal film-pulling servo motor 145 drives the rotating rod 147 via the synchronous belt structure. The rotation of the rotating rod 147 drives the pull belt 1410 to rotate on rotating wheels 148 and 149. Since both ends of the pull belt 1410 are fixed to the mounting plate 143, the pull belt 1410 drives the mounting plate 143 via sliding seat rails 1412 on the film-pulling mounting frame 141, thereby driving the entire frame 142 back and forth. The movement of the frame 142 drives the pneumatic film clamping jaws 144. The pressure plate 125 is provided with a plurality of openings 127 for the pneumatic film clamping jaws 144 to pass through. The pneumatic film clamping jaws 144 operate, passing through the openings 127 to clamp the cut or replaced film.

[0049] In the initial state, the horizontal film-drawing and laminating mechanism 100 descends to the material laminating height, the film-drawing assembly 140 stops at one end of the film being pulled out, the pneumatic film clamping jaws 144 close and clamp the film, horizontally pulling the film to the required length, and the film roll 103 passively rotates to release the film during this process. After it is in place, the film pressing assembly 120 presses the film, and the film cutting assembly 130 runs along the width direction of the film to cut the film. The film pressing assembly 120 near one end of the film-drawing assembly 140 rises and opens, and the film automatically falls to the top of the material to be packaged. The film-drawing assembly 140 continues to pull a short distance so that the film is laid flat on the top of the material to be packaged. Then the pneumatic film clamping jaws 144 open, and the film completely covers the top of the material. The horizontal film-drawing and laminating mechanism 100 is lifted to a safe distance driven by the lifting mechanism 200 to facilitate the passage of materials.

[0050] In an embodiment of the present invention, a film feeding motor can also be configured at the end of the tensioning roller 111. The film feeding motor actively rotates to drive the tensioning roller 111 to rotate, thereby rotating the film roll 103. The rotation speed matches the pulling speed of the film pulling assembly 140, effectively solving the free film feeding process of heavier films.

[0051] The film rack 101 is provided with a film roll detection sensor 1413 for detecting whether there is any film blocking it. Under normal circumstances, the film roll detection sensor 1413 is blocked by the film roll 103. When the film roll 103 is about to run out, the film roll detection sensor 1413 is not blocked by the film roll 103, and the signal transmission control platform sends an alarm to remind the staff to change the film. It is used in conjunction with the tension sensor connected to the film roll tensioning spring 114. Timely film replacement can ensure the continuous and stable operation of the automated production line. The mounting seat 146 of the horizontal film-stretching servo motor 145 is provided with a film-stretching detection sensor 1414, which adopts a background suppression diffuse reflection photoelectric sensor to judge the length of the film stretching and whether the film is completely pulled out. The end of the film-stretching fixing frame 141 away from the film roll 103 is provided with a material top sensing sensor 1415 for judging the lifting distance. The distance sensor is used to judge the safe distance for lifting and lowering the horizontal film-stretching and laminating mechanism 100 to prevent damage to the equipment.

[0052] The control platform adopts the existing structure. The specific connection methods of each part in the utility model adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0053] The embodiment of the present invention provides a top film laminating device for material packaging. The material length specification is given by the automated production line information (such as a barcode scanning gun). The film pulling component 140 pulls the film length according to the material length. The lifting mechanism 200 drives the film pulling and laminating mechanism to descend to the material height. The film pressing component 120 presses the film. The film cutting component 130 completes the separation of the film and the film roll 103, and automatically completes the film laying. The lifting mechanism 200 drives the automatic laminating equipment to restore the initial position. It is suitable for laminating operations of material packaging with multiple specifications.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A top film covering device for material packaging, characterized in that: It includes a lifting frame, a lifting mechanism is arranged inside the lifting frame, the lifting mechanism is connected to a horizontal film pulling and laminating mechanism, the horizontal film pulling and laminating mechanism includes a film frame arranged in the middle of the lifting frame, the film frame is provided with a film roll for rotatably unwinding the film raw material, a film tensioning assembly for tensioning the film, a film pressing assembly for fixing the film, and a film cutting assembly for cutting the film, and the end of the film frame away from the film roll is connected to a film pulling assembly for pulling the film to a fixed length.

2. The top film covering device for material packaging according to claim 1, characterized in that: The lifting mechanism includes a lifting assembly and a guide assembly symmetrically arranged on both sides of the lifting frame, and the film frame is connected to the lifting frame through the lifting assembly and the guide assembly; The lifting assembly includes sprocket 1 and sprocket 2 symmetrically arranged on both sides of the lifting frame. Sprocket 1 is arranged above sprocket 2. A chain is arranged on sprocket 1. One end of the chain passes around sprocket 1 and is connected to the top of the film frame. The other end of the chain passes around sprocket 2 and is connected to the bottom end of the film frame. A lifting motor is arranged on the lifting frame, and the output shaft of the lifting motor is connected to the center of sprocket 1.

3. The top film covering device for material packaging according to claim 2, characterized in that: The guide assembly includes vertical guide grooves symmetrically arranged on the inner surfaces of both sides of the lifting frame. A guide wheel is rotatably arranged on the film frame. The guide wheel is arranged in the vertical guide groove and rotates in the vertical guide groove.

4. The top film covering device for material packaging according to claim 1, characterized in that: The film tensioning assembly includes a tensioning roller 1 and a tensioning roller 2 arranged along the width direction of the film roll. The tensioning roller 1 is rotatably set on the film frame. One end of the film on the film roll passes around the tensioning roller 1 and passes through the upper end of the tensioning roller 2 and is connected to the film stretching mechanism. The tensioning roller 2 is rotatably set at one end of the tensioning frame. The other end of the tensioning frame is rotatably connected to the film frame. A tension spring is provided on the tension frame. One end of the tension spring is connected to the tension frame through a tension sensor, and the other end of the tension spring is connected to one end of the pull rod, and the other end of the pull rod is connected to the film frame.

5. The top film covering device for material packaging according to claim 1, characterized in that: The film pressing assembly includes two groups of symmetrically arranged film pressing structures, which are arranged along the width direction of the film roll. The film pressing structure includes a film pressing cylinder hinged to the film frame, the cylinder rod of the film pressing cylinder is hinged to one end of the rotating frame, the other end of the rotating frame is rotatably connected to the lower end of the pressure plate, the middle of the rotating frame is rotatably connected to the film frame, the upper end of the pressure plate is rotatably connected to one end of the rotating frame, and the other end of the rotating frame is rotatably connected to the film frame. A pressure block is provided at the bottom end of the pressure plate, and a fixed plate for supporting the film is provided under the pressure block of the film pressing structure.

6. The top film covering device for material packaging according to claim 5, characterized in that: The film cutting assembly includes a rodless cylinder arranged between two sets of film pressing structures. The rodless cylinder is arranged on the film frame. The rodless cylinder is provided with a cutting knife running along the width direction of the film roll.

7. The top film covering device for material packaging according to claim 6, characterized in that: A film-pulling fixing frame is connected to the end of the film frame away from the film roll, and the film-pulling assembly is arranged on the film-pulling fixing frame. The film-pulling assembly includes a frame arranged on the film-pulling fixing frame, and a mounting plate is arranged at the bottom end of the frame. The mounting plate is connected to the film-pulling fixing frame through a power structure and a sliding structure. Several groups of pneumatic film clamping claws for clamping the film are arranged on the end of the frame close to the film roll.

8. The top film covering device for material packaging according to claim 7, characterized in that: The power structure includes a horizontal film-stretching servo motor, which is arranged on a mounting seat, which is arranged on a film frame, and the output shaft of the horizontal film-stretching servo motor is connected to a rotating rod through a synchronous belt transmission structure, and the rotating rod is rotatably arranged on a film-stretching fixed frame, and a rotating wheel 1 is arranged on the rotating rod, and a rotating wheel 2 is rotatably arranged on an end of the film-stretching fixed frame away from the rotating rod, and a pulling belt is arranged on the rotating wheel 1 and the rotating wheel 2, and one end of the pulling belt passes around the rotating wheel 1 and is connected to one end of the mounting plate, and the other end of the pulling belt passes around the rotating wheel 2 and is connected to the other end of the mounting plate; The sliding structure comprises a sliding block arranged on the side of the mounting plate, a slide rail matched with the sliding block is arranged on the film-pulling fixing frame, and the sliding block is slidably connected to the slide rail.

9. The top film covering device for material packaging according to claim 8, characterized in that: The film rack is equipped with a film roll detection sensor for detecting whether there is any film blocking the film. The mounting seat of the horizontal film pulling servo motor is equipped with a film pulling detection sensor for judging the length of the film pulling. The end of the film pulling fixing frame away from the film roll is equipped with a material top induction sensor for judging the lifting distance.

10. The top film covering device for material packaging according to claim 9, characterized in that: The pressing plate is provided with a plurality of through openings for the pneumatic film clamping jaws to pass through.

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