Metal cover film pasting device

Abstract

The utility model belongs to metal piece production equipment technical field especially relates to a kind of metal cover film pasting device, it includes: main body, and film winding and conveying unit and workpiece conveying unit are provided on main body;Film pressurizing unit, film pressurizing unit is set on main body for attaching film on the surface of metal cover;Film pressurizing unit further includes: pressurizing part, pressurizing part includes two pressurizing rollers that are symmetrically distributed up and down, and pressurizing roller is driven to rotate by driving part;Wherein, two pressurizing rollers are rotated and contacted each other, relative to prior art, the utility model can promptly transfer heat to the pressurizing roller above, to effectively and timely heat supplement, guarantee the film pasting effect of film pasting device.

Description

Technical Field

[0001] This utility model belongs to the technical field of metal parts production equipment, and in particular relates to a metal cover film application device. Background Technology

[0002] Metal laminating equipment is mainly used to apply thin films to metal surfaces. Common applications include protective films, decorative films, functional films, and packaging films. Laminating equipment typically involves automated processes, improving production efficiency and film application quality, and is widely used in industries such as automotive, home appliances, and electronics. For example, the automatic laminating production line disclosed in patent application number CN201720294349.X includes a roller feeding device with an automatic laminating machine. A PE film holder is positioned above the automatic laminating machine, and a roller finished product output device is located behind it. In the operation of this existing film-applying device, heat loss occurs when the pressure roller contacts the film and applies pressure, resulting in a large temperature difference on the roller surface between the initial and final stages of pressure application. Conventional heating wires cannot effectively and timely replenish the heat, thus reducing the film-applying effect of the device. Therefore, it is necessary to make improvements. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a metal cap film application device to effectively improve the film application effect.

[0004] In view of this, the present invention provides a metal cap film applicator, comprising: The main body is provided with a film winding and conveying unit and a workpiece conveying unit. A membrane pressurizing unit, which is disposed on the main body and is used to attach a membrane to the surface of a metal cover; The thin-film pressurization unit further includes: The pressure section includes two pressure rollers symmetrically distributed vertically, and the pressure rollers are driven to rotate by a driving component. The two pressure rollers rotate and come into contact with each other.

[0005] In this technical solution, during the operation of the metal cover film application device, the pressure section applies pressure through the pressure roller to attach the film to the surface of the metal cover. Furthermore, through the design of two pressure rollers symmetrically distributed above and below the pressure section, when heat loss occurs due to the pressure rollers contacting the film, the lower pressure roller can promptly transfer heat to the upper pressure roller through contact with the upper pressure roller, thereby effectively and timely replenishing the heat and ensuring the film application effect of the film application device.

[0006] In the above technical solution, the pressure roller further includes: A roller body, with roller drive shafts provided at both ends of the roller body; A heating element is provided on the roller body for heating the roller body.

[0007] In the above technical solution, the heating element further includes: The mounting holes penetrate the roller body along the direction parallel to the axial direction of the roller body, and there are a plurality of mounting holes that are evenly spaced along the circumference of the roller body. A first heating element support is provided on the first heating element support, and a plurality of first heating elements are provided on the first heating element support; The second heating element support is provided with a plurality of second heating elements; A slip ring conductive element is disposed on the outer side of the first and second heating element supports for energizing a plurality of first and second heating elements. The first and second heating element supports are provided with a central hole through which the roller drive shaft passes. Several first and second heating elements are evenly distributed around the central hole. The first and second heating element supports are installed at both ends of the roller body by fasteners. Several first and second heating elements are embedded in the roller body through several mounting holes.

[0008] In the above technical solution, the slip ring conductive element further includes: Conductive slip rings are respectively disposed on the outer sides of the first and second heating element supports; A conductive support is disposed on the outside of the conductive slip ring and electrically connected to the conductive slip ring via conductive contacts.

[0009] In the above technical solution, the conductive contact further includes: A contact base, wherein an inner cavity is provided in the contact base; The contact body has its bottom end slidably disposed in the inner cavity and electrically connected to the contact seat, and its top end protrudes from the top of the inner cavity and makes electrical contact with the surface of the conductive slip ring. An elastic element is disposed in the inner cavity to support the contact body so as to keep the contact body in constant electrical contact with the surface of the conductive slip ring.

[0010] In the above technical solution, the elastic element further includes: Several springs are evenly distributed in the inner cavity, with one end of each spring connected to the contact seat and the other end connected to the contact body. A conical cavity is provided inside the contact body, and the diameter of the bottom end of the conical cavity is larger than the diameter of the top end. The bottom end of the conical cavity forms an opening on the bottom surface of the contact body. Two sliding grooves are radially symmetrically distributed inside the conical cavity. A reed, wherein the reed is disposed in a conical cavity and both ends of the reed are slidably connected to two sliding grooves via sliders; Two elastic support rods are arranged in the inner cavity to support the slider. The axial projection of the slide groove coincides with the central axis of the conductive contact, and the spring, slider and elastic support rod are electrically connected to each other in a conductive path.

[0011] The beneficial effects of this utility model are: 1. By opening multiple sets of circumferentially evenly distributed mounting holes in the main body of the pressure roller and adopting a heating structure in which the first and second heating elements are embedded, heat is evenly transferred along the circumferential and axial directions of the roller body. The circumferential and axial temperature differences on the roller surface are effectively reduced, thus improving the film application effect of the film application device.

[0012] 2. With two pressure rollers symmetrically distributed vertically, the lower pressure roller can transfer heat to the upper pressure roller in a timely manner to compensate for heat loss. The temperature fluctuation range of the roller surface is small, which effectively avoids changes in film adhesion caused by temperature fluctuations and further improves the film application effect of the film application device.

[0013] 3. The power supply structure adopts a combination of conductive slip rings and multiple sets of conductive contacts. The conductive slip rings rotate synchronously with the pressure rollers, while the conductive contacts remain stationary, completely solving the problem of tangling in traditional wire power supply. At the same time, the elastic elements (spring + leaf spring + elastic support rod) of the conductive contacts provide double elastic force to ensure reliable contact between the contact body and the conductive slip ring, effectively reducing the power supply failure rate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the pressure roller structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the main structure of the roller of this utility model.

[0018] Figure 4 This is a schematic diagram of the heating element structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the conductive contact structure of this utility model.

[0020] The markings in the diagram are as follows: 1. Pressure roller; 2. Drive component; 3. Roller body; 4. Roller drive shaft; 5. Heating element; 50. Mounting hole; 51. First heating element support; 52. First heating element; 53. Second heating element support; 54. Second heating element; 55. Center hole; 6. Slip ring conductive component; 60. Conductive slip ring; 61. Conductive support; 7. Conductive contact; 70. Contact seat; 71. Inner cavity; 72. Contact body; 74. Spring; 75. Conical cavity; 76. Slide groove; 77. Spring sheet; 78. Elastic support rod; 8. Conductive block; 9. Axial groove; 10. V-shaped metal spring sheet; Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] Main body The main body serves as the foundation and control core of the device, including the frame, control center, and worktable: The frame is made of welded steel and has adjustable feet at the bottom to ensure the levelness of the work surface. The side of the frame has a maintenance door and the interior has reserved space for wiring channels and equipment installation.

[0024] Control Center: Integrated on the upper part of the frame, it uses a PLC controller as the core control unit, which can realize functions such as equipment start and stop, parameter setting (such as conveyor belt speed, pressure roller 1 temperature, pressure), and fault alarm (such as abnormal temperature, missing film, missing material). The control center also has a built-in temperature acquisition module and motor drive module, which are used to monitor the temperature of pressure roller 1 and control the operation of each drive component 2, respectively.

[0025] Worktable: It is laid on the top of the frame and is made of 10mm thick aluminum alloy plate with an anodized surface. A rectangular opening is opened in the middle of the worktable corresponding to the position of the film pressing unit to avoid the contact area between the pressure roller 1 and the metal cover. The edge of the opening is chamfered to avoid scratching the film or the metal cover.

[0026] Film winding and conveying unit The film winding and conveying unit is located on one side of the worktable of the main body and is used to realize the unwinding, guiding and winding of the film. It includes an unwinding roller, a winding roller, an intermediate guide roller and a tension adjustment assembly. Unwinding roller: Used to mount the film roll. Keyways are opened on the surface of the roller body, and the unwinding drive motor is connected by key. Baffles are set on both sides of the unwinding roller to prevent the film roll from deviating. A tension sensor is set under the unwinding roller to monitor the film tension in real time.

[0027] Take-up roller: Used to take up the release paper produced after film application. Its structure is the same as the unwind roller. It is driven by a take-up drive motor. The take-up speed and unwind speed are adjusted in conjunction with the control center to ensure stable film tension.

[0028] Intermediate guide rollers: There are 3 sets in total, all made of polyurethane. They are arranged between the unwinding roller and the pressure unit, and between the pressure unit and the take-up roller, respectively. They are used to change the film conveying direction and assist in tensioning. The installation height of the intermediate guide rollers can be finely adjusted up and down by adjusting the bracket to adapt to films of different thicknesses.

[0029] Tension adjustment component: includes a tension swing arm and a counterweight. One end of the tension swing arm is hinged to the frame, and the other end is connected to the counterweight. The middle of the swing arm is in contact with the film. When the film tension changes, the swing arm swings around the hinge point. The tension sensor collects the swing angle signal and feeds it back to the control center. The control center adjusts the speed of the unwinding / rewinding motor to realize closed-loop tension control.

[0030] Workpiece conveying unit The workpiece conveying unit is located above the worktable and is used for the positioning and conveying of the metal cover. It includes a conveyor belt and a vacuum adsorption structure. Conveyor belt: Made of PU belt with evenly distributed adsorption holes on the surface, suitable for metal covers; the conveyor belt is supported by a drive roller and a driven roller, the drive roller is driven by a conveyor drive motor, the conveying speed is adjustable, and intermittent conveying is supported.

[0031] Vacuum adsorption structure: includes a vacuum chamber, a vacuum generator, and vacuum pipelines; the vacuum chamber is located below the conveyor belt and is fixedly connected to the worktable, with suction grooves opened on the top of the vacuum chamber corresponding to the adsorption holes of the conveyor belt; the vacuum generator is connected to the vacuum chamber through the vacuum pipelines, generating a vacuum range of -0.06 to -0.08 MPa to adsorb the metal cover onto the conveyor belt, preventing it from shifting or tipping over during transport; a vacuum filter and a vacuum pressure switch are installed in the vacuum pipelines, used to filter impurities and monitor the vacuum level, respectively. When the vacuum level is lower than the set value (-0.05 MPa), the control center will alarm and stop the machine.

[0032] Thin-film pressurization unit The membrane pressurization unit is located in the middle of the worktable of the main body and is used to attach the membrane to the surface of the metal cover. It includes a pressurization part, a driving component 2, and a slip ring conductive component 6, wherein the pressurization part is the core component. The pressurizing section includes two pressurizing rollers 1 symmetrically distributed vertically, roller supports, and roller moving cylinders: Pressure roller 1: It has a double roller symmetrical structure, including roller body 3, roller drive shaft 4 and heating element 5. Roller body 3 is made of aluminum alloy and has a conductive coating on its surface. There are 8 through mounting holes 50 in the roller body 3 along the direction parallel to the axial direction. They are evenly distributed around the circumference of the roller body 3 for mounting the heating element.

[0033] Roller drive shaft 4: Located at both ends of the roller body 3, integrally formed with the roller body 3, with keyways at the ends of the drive shaft, and connected to the driven pulley of the pulley drive structure via a flat key; the surface of the drive shaft is chrome-plated to improve wear resistance and rust prevention.

[0034] Heating unit 5: Used to heat the main body 3, including a first heating element support 51, a second heating element support 53, a first heating element 52, a second heating element 54, and conductive wires. The first and second heating element supports are both ring-shaped structures made of polytetrafluoroethylene and concentrically distributed with the roller body 3. Eight heating element mounting holes 50 are evenly opened around the circumference of the supports, corresponding one-to-one with the mounting holes 50 of the roller body 3. The supports are installed at both ends of the roller body 3 by fasteners, with bolt holes and heating element mounting holes 50 spaced apart to ensure that the supports are installed firmly and do not interfere with the heating elements.

[0035] The first and second heating elements both use nickel-chromium alloy heating tubes with a rated power of 100W / tube and a rated voltage of 220V. One end of the first heating element 52 is fixed to the first heating element bracket 51, and the other end has an interlocking protrusion. One end of the second heating element 54 is fixed to the second heating element bracket 53, and the other end has an interlocking groove. The first and second heating elements are inserted into the mounting holes 50 of the roller body 3 through the interlocking protrusion and groove, forming a heating structure that penetrates the roller body 3, ensuring that heat is evenly transferred to the roller surface. The surface of the heating tube is covered with a magnesium oxide insulation layer with an insulation resistance ≥10 ohms. 6 Ω, to prevent leakage.

[0036] Conductive wire: Copper core polytetrafluoroethylene insulated wire is used and arranged in the internal wire groove of the first and second heating element brackets; one end of the conductive wire is connected to the electrode of the heating element (fixed by crimping terminal), and the other end is electrically connected to the slip ring conductive component 6 to realize the power supply of the heating element.

[0037] Roller support: It is welded from 45# steel and has a "U" shaped structure. The upper and lower pressure rollers 1 are installed in the support. The support is equipped with bearing seats, and the roller drive shaft 4 is rotatably connected to the support through the bearing seats. The bearing seats are filled with high-temperature grease to reduce rotational friction.

[0038] Roller moving cylinders: Each is set at the bottom of the support and is made of air cylinders; the piston rod of the air cylinder is fixedly connected to the support, and the support is raised and lowered by controlling the extension and retraction of the air cylinder, thereby adjusting the distance and pressure between the upper pressure roller 1 and the metal cover; the air cylinder is equipped with a pressure sensor to monitor the pressure in real time and feed it back to the control center to realize pressure closed-loop control.

[0039] Drive component 2 Drive component 2 is used to drive the pressure roller 1 to rotate, and includes a drive motor and a pulley transmission structure: Drive motor: A three-phase asynchronous motor is used, which is installed on the side of the frame. The motor output shaft is connected to the drive pulley through a coupling.

[0040] The pulley drive structure includes a driving pulley, a driven pulley, and a synchronous belt. The driven pulley is connected to the roller drive shaft 4 of the pressure roller 1 via a flat key. The driving pulley and the driven pulley are driven by the synchronous belt with a transmission ratio of 2:1, which enables the pressure roller 1 to reach a speed of 700 r / min to meet the film application speed requirements. A toothed protective cover is provided on the surface of the synchronous belt to prevent foreign objects from being rolled in.

[0041] Slip ring conductive element 6 The slip ring conductive component 6 is disposed at the end of the roller drive shaft 4 of the pressure roller 1, and is used to achieve stable power supply when the pressure roller 1 rotates. It includes a conductive slip ring 60, a conductive bracket 61, a housing, an electrical connection terminal, and a conductive contact 7. The conductive slip ring 60 is a cap-type slip ring, which is fixed to the heating element bracket by a set screw and rotates synchronously with the pressure roller 1. A polytetrafluoroethylene insulating gasket is set between the slip ring and the first and second heating element brackets to ensure electrical insulation and prevent short circuit.

[0042] The conductive bracket 61 has a U-shaped structure and is fixed to the inside of the housing by bolts. The inner side wall of the bracket has a contact mounting groove for installing conductive contacts 7. The contacts contact the outer conductive ring of the conductive slip ring 60 to realize current transmission.

[0043] Outer shell: Made of ABS engineering plastic injection molding, in the shape of a hollow ring shell. A hole is opened in the center of the outer shell for the roller drive shaft 4 to pass through. The hole wall is equipped with a wear-resistant sealing ring to prevent dust and moisture from entering. The outer shell is fixed to the frame by a bracket and does not rotate with the pressure roller 1. An electrical connection terminal is provided on the side of the outer shell for connecting to an external power supply.

[0044] Electrical connection terminal: connected to the conductive bracket 61 via a conductive wire. The conductive wire is arranged in a wire groove inside the housing. The wire groove is filled with epoxy resin sealant to fix the wire and enhance insulation.

[0045] The conductive contact 7 includes a contact base 70, a contact body 72, an elastic element, a conductive block 8, and a V-shaped metal spring 10. The contact base 70 is made of brass (silver plated), is cylindrical, and has an inner cavity 71. The top of the contact base 70 has an opening that communicates with the inner cavity 71, and the edge of the opening forms a limiting step. The contact base 70 is fixed in the mounting groove of the conductive bracket 61 by a threaded connection, and the bottom is welded to the conductive wire.

[0046] Contact body 72: Made of copper, cylindrical in shape; the bottom of the contact body 72 has a radial protrusion that cooperates with the limiting step of the contact seat 70 to prevent the contact body 72 from coming out of the inner cavity 71; the top of the contact body 72 is hemispherical and contacts the surface of the conductive slip ring 60 to reduce contact wear.

[0047] Elastic element: Used to maintain reliable contact between the contact body 72 and the conductive slip ring 60, including spring 74, tapered cavity 75, spring sheet 77 and elastic support rod 78: Two compression springs 74 are symmetrically arranged in the inner cavity 71. One end of the spring 74 contacts the bottom of the inner cavity 71 of the contact seat 70, and the other end contacts the bottom of the contact body 72, providing axial elastic force to ensure that the contact body 72 is always in contact with the conductive slip ring 60.

[0048] A conical cavity 75 is formed inside the contact body 72. The top diameter of the conical cavity 75 is 5mm and the bottom diameter is 10mm. The bottom end forms an opening on the bottom surface of the contact body 72. Two sliding grooves 76 are symmetrically formed on the inner wall of the conical cavity 75. The axial projection of the sliding grooves 76 coincides with the central axis of the contact body 72.

[0049] The reed 77 is made of phosphor bronze and has an arc-shaped structure. Sliders are set at both ends of the reed 77, and the sliders slide in contact with the groove 76. The reed 77 has outward elastic tension in its natural state. The radial displacement of the reed 77 is limited by the cooperation between the slider and the groove 76.

[0050] The elastic support rod 78 is made of stainless steel and consists of two rods. One end is fixed to the bottom of the inner cavity 71 of the contact seat 70, and the other end passes through the opening at the bottom of the contact body 72 and extends into the conical cavity 75, contacting the middle of the spring 77. The elastic support rod 78 provides radial elastic force to help the spring 77 maintain the stability of the contact body 72.

[0051] Conductive block 8: Made of brass, it is fixed to the radially protruding outer side of the bottom of the contact body 72; the conductive block 8 is electrically connected to the contact body 72 and is used to transmit current.

[0052] V-shaped metal spring 10: Made of beryllium copper, it is fixed in the axial groove 9 of the inner wall of the inner cavity 71 of the contact seat 70; the opening of the V-shaped spring faces the conductive block 8. When the conductive block 8 moves up and down with the contact body 72, it is always held by the V-shaped spring, ensuring reliable contact between the conductive block 8 and the V-shaped spring, forming an auxiliary conductive path, and avoiding single-point contact failure.

[0053] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A metal cap film applicator, comprising: The main body is provided with a film winding and conveying unit and a workpiece conveying unit. A membrane pressurizing unit, which is disposed on the main body and is used to attach a membrane to the surface of a metal cover; The thin-film pressurization unit is characterized in that it further includes: The pressure section includes two pressure rollers (1) symmetrically distributed vertically, and the pressure rollers (1) are driven to rotate by a driving member (2); Among them, the two pressure rollers (1) rotate and come into contact with each other.

2. The metal cover film pasting device according to claim 1, characterized in that, The pressure roller (1) also includes: Roller body (3), with roller drive shafts (4) provided at both ends of the roller body (3); A heating element (5) is provided on the roller body (3) for heating the roller body (3).

3. The metal cover film pasting device according to claim 2, characterized in that, The heating element (5) also includes: Mounting holes (50) are provided, which penetrate the roller body (3) along the direction parallel to the axial direction of the roller body (3). There are a plurality of mounting holes (50) and they are evenly spaced along the circumference of the roller body. A first heating element support (51) is provided with a plurality of first heating elements (52); The second heating element support (53) is provided with a plurality of second heating elements (54); Slip ring conductive element (6), the slip ring conductive element (6) is respectively disposed on the outer side of the first and second heating element support for energizing a plurality of first and second heating elements; The first and second heating element supports are provided with a central hole (55) through which the roller drive shaft (4) passes. Several first and second heating elements are evenly distributed around the central hole (55). The first and second heating element supports are installed at both ends of the roller body (3) by fixing parts. Several first and second heating elements are embedded in the roller body (3) through several mounting holes (50).

4. The metal cap film applicator according to claim 3, characterized in that, The slip ring conductive element (6) further includes: Conductive slip rings (60) are respectively disposed on the outer sides of the first and second heating element supports (53); A conductive support (61) is disposed on the outside of the conductive slip ring (60) and electrically connected to the conductive slip ring (60) through a conductive contact (7).

5. A metal cap film applicator according to claim 4, characterized in that, The conductive contact (7) also includes: A contact seat (70) having an inner cavity (71) therein; The contact body (72) has its bottom end slidably disposed in the inner cavity (71) and electrically connected to the contact seat (70), and its top end protrudes from the top of the inner cavity (71) and makes electrical contact with the surface of the conductive slip ring (60). An elastic element is disposed in the inner cavity (71) to support the contact body (72) so that the contact body (72) is always in electrical contact with the surface of the conductive slip ring (60).

6. A metal cap film applicator according to claim 5, characterized in that, The elastic element also includes: Several springs (74) are evenly distributed in the inner cavity (71). One end of each spring (74) is connected to the contact seat (70), and the other end is connected to the contact body (72). A conical cavity (75) is provided inside the contact body (72) and the bottom diameter of the conical cavity (75) is larger than the top diameter. The bottom end of the conical cavity (75) forms an opening on the bottom surface of the contact body (72). Two grooves (76) are radially symmetrically distributed inside the conical cavity (75). A reed (77) is disposed in a conical cavity (75) and both ends of the reed (77) are slidably connected to two sliding grooves (76) by a slider; Two elastic support rods (78) are provided in the inner cavity (71) to support the slider. The axial projection of the slide groove (76) coincides with the central axis of the conductive contact (7), and the spring (77), the slider and the elastic support rod (78) are electrically connected to each other in a conductive path.

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