Preheating and flattening structure for a solventless laminator

Abstract

The utility model discloses a kind of preheating flattening structure for solventless laminator, belong to solventless laminator technical field.It solves the problem that plastic film as base material is wrinkled before entering laminating mechanism and two base materials are poor in glue flowability and poor in infiltration when laminating.It mainly includes two side frames of relative arrangement, flattening roller is rotatably installed between two side frames, upper preheating roller and lower preheating roller are rotatably installed respectively on the upper and lower sides of flattening roller.

Description

Technical Field

[0001] This utility model belongs to the technical field of solventless laminating machines, and more specifically, it relates to a preheating and flattening structure for solventless laminating machines. Background Technology

[0002] Solvent-free laminators are devices that bond two or more substrates (such as films, paper, aluminum foil, etc.) together. Currently, when using plastic films as a substrate in solvent-free laminators, the plastic film sometimes wrinkles before entering the laminating mechanism. Furthermore, when using plastic films as a substrate to laminate with adhesive-coated substrates, problems such as poor adhesive flow and inadequate wetting sometimes occur. Summary of the Invention

[0003] The purpose of this invention is to provide a preheating and flattening structure for a solventless laminating machine, so as to overcome the problems in the prior art where plastic film as a substrate wrinkles before entering the laminating mechanism and the glue has poor flowability and poor wetting when the two substrates are laminated.

[0004] This utility model is achieved by the following technical solution: a preheating and flattening structure for a solventless laminating machine, comprising two opposing frames, a flattening roller rotatably mounted between the two frames, and an upper preheating roller and a lower preheating roller rotatably mounted on the upper and lower sides of the flattening roller, respectively.

[0005] Furthermore, the flattening roller is a threaded flattening roller.

[0006] Furthermore, both the upper and lower preheating rollers are electromagnetic heating rollers.

[0007] Furthermore, it also includes a wrap angle adjustment mechanism installed between the two side frames. The wrap angle adjustment mechanism includes two side sliders. The two ends of the flattening roller are rotatably mounted on the two side sliders through bearing seats. The two side frames are respectively provided with slide grooves. The top and bottom surfaces of the slide grooves are respectively installed with guide rails. The two side sliders are respectively inserted into the two side slide grooves. The top and bottom surfaces of the sliders are respectively provided with guide rail grooves for the guide rails to be inserted. A drive plate is installed between the two side sliders. The two side frames are equipped with support frames on the rear side of the drive plate. A cylinder is fixedly installed on the support frame. The piston rod of the cylinder is fixedly connected to the drive plate.

[0008] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting a flattening roller, this utility model can flatten the plastic film that is about to enter the laminating mechanism, thereby effectively avoiding wrinkles in the plastic film.

[0009] 2. This utility model improves the flattening effect of the flattening roller by installing a preheating roller on the upper side of the flattening roller. The upper preheating roller can preheat the plastic film that is about to enter the flattening roller.

[0010] 3. By setting an upper preheating roller and a lower preheating roller before the laminating mechanism, the plastic film about to enter the laminating mechanism can be preheated. When the heated plastic film is laminated with the substrate coated with adhesive, the fluidity of the adhesive can be improved, the viscosity of the adhesive can be appropriately reduced, and the wetting ability of the adhesive can be enhanced.

[0011] 4. By setting up an upper preheating roller and a lower preheating roller, and with the preheating temperature of the upper preheating roller being lower than that of the lower preheating roller, a stepped heating preheating can be formed, so that the plastic film first undergoes low-temperature preheating and then high-temperature preheating. This allows the temperature of the plastic film to rise steadily and reduces the thermal stress caused by excessive temperature difference and rapid heating.

[0012] 5. By setting up a wrap angle adjustment mechanism, this utility model can easily adjust the wrap angle of the flattening roller. In this utility model, when the cylinder drives the flattening roller to move horizontally away from the upper preheating roller, the wrap angle of the flattening roller can be increased, thereby improving the flattening ability of the flattening roller. When the cylinder drives the flattening roller to move horizontally closer to the upper preheating roller, the wrap angle of the flattening roller can be decreased, thereby reducing the flattening ability of the flattening roller. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the wrap angle adjustment mechanism described in this utility model.

[0014] In the diagram: 1. Frame; 2. Flattening roller; 3. Upper preheating roller; 4. Lower preheating roller; 5. Slider; 6. Slide groove; 7. Guide rail; 8. Guide rail groove; 9. Drive plate; 10. Support frame; 11. Cylinder; 12. Composite mechanism. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.

[0016] A preheating and flattening structure for a solvent-free laminating machine includes two side frames 1, which are arranged opposite to each other. Figure 1 For ease of illustration of the structure of this utility model, Figure 1Only one side of the frame 1 is described. A flattening roller 2 is rotatably mounted between the two frames 1. The flattening roller 2 is used to flatten the plastic film to eliminate wrinkles on the plastic film. The flattening roller 2 is a threaded flattening roller, which is existing technology. It mainly includes a roller core and a rubber layer disposed on the outside of the roller core. The surface of the rubber layer has threaded grooves with opposite directions of rotation along the center to both sides.

[0017] The frame 1 on both sides has an upper preheating roller 3 and a lower preheating roller 4 rotatably mounted on the upper and lower sides of the flattening roller 2, respectively. Both the upper preheating roller 3 and the lower preheating roller 4 are electromagnetically heated rollers. The plastic film of this invention enters the upper preheating roller 3 through the unwinding mechanism and multiple guide rollers. After passing through the lower preheating roller 4, the plastic film directly enters the laminating mechanism 12 between the laminating roller and the pressure roller. When the plastic film passes through the laminating mechanism 12, it is laminated with the substrate coated with adhesive.

[0018] This invention preheats the plastic film before it enters the laminating mechanism 12 by setting an upper preheating roller 3 and a lower preheating roller 4. The preheated plastic film improves the fluidity of the adhesive when laminating it with a substrate coated with glue, while also appropriately reducing the viscosity and enhancing the wetting ability of the adhesive. By setting the upper preheating roller 3 and the lower preheating roller 4, with the preheating temperature of the upper preheating roller 3 being lower than that of the lower preheating roller 4, a stepped preheating process is achieved. This allows the plastic film to undergo preheating at a low temperature first, followed by preheating at a high temperature, resulting in a more stable temperature rise and reducing thermal stress caused by excessive temperature differences or rapid heating.

[0019] This invention improves the flattening effect of the flattening roller 2 by installing a preheating roller 3 on the upper side of the flattening roller 2 and preheating the plastic film entering the flattening roller 2 with the upper preheating roller 3.

[0020] This utility model also includes a wrap angle adjustment mechanism installed between the two side frames 1. The wrap angle adjustment mechanism includes two side sliders 5. The two ends of the flattening roller 2 are respectively rotatably installed on the two side sliders 5 through bearing seats. The bearing seats are fixedly connected to the sliders 5 by bolts.

[0021] The two sides of the frame 1 are respectively provided with slide grooves 6, and guide rails 7 are respectively installed on the top and bottom surfaces of the slide grooves 6. The two sliders 5 are respectively inserted into the two slide grooves 6, and the top and bottom surfaces of the sliders 5 are respectively provided with guide rail grooves 8 for the guide rails 7 to be inserted. By setting the guide rails 7 and guide rail grooves 8, this utility model allows the two sliders 5 to move back and forth only along the length direction of the slide grooves 6.

[0022] A drive plate 9 is installed between the two sliders 5 on both sides. A support frame 10 is installed on the rear side of the drive plate 9 on both sides of the frame 1. Both ends of the support frame 10 can be fixedly connected to the two sides of the frame 1 by bolts. A cylinder 11 is fixedly installed on the support frame 10, and the piston rod of the cylinder 11 is fixedly connected to the drive plate 9.

[0023] This invention uses a cylinder 11 to drive a plate 9 to move back and forth. Since both ends of the drive plate 9 are fixedly connected to two side sliders 5, the cylinder 11 simultaneously drives the two side sliders 5 to move back and forth, which in turn drives the flattening roller 2 to move back and forth. This invention adjusts the wrap angle of the flattening roller 2 by driving it to move back and forth. In this invention, when the cylinder 11 drives the flattening roller 2 to move horizontally away from the upper preheating roller 3, the wrap angle of the flattening roller 2 can be increased, thereby improving its flattening ability. When the cylinder 11 drives the flattening roller 2 to move horizontally closer to the upper preheating roller 3, the wrap angle of the flattening roller 2 can be decreased, thereby reducing its flattening ability.

Claims

1. A preheat flattening structure for a solventless laminator, characterized by, It includes two opposing frames (1), with a flattening roller (2) rotatably mounted between the two frames (1), and an upper preheating roller (3) and a lower preheating roller (4) rotatably mounted on the upper and lower sides of the flattening roller (2) respectively on the two frames (1).

2. The preheat flattening structure for a solventless laminator of claim 1, wherein, The flattening roller (2) is a threaded flattening roller.

3. The preheating and flattening structure for a solventless laminating machine according to claim 1, characterized in that, Both the upper preheating roller (3) and the lower preheating roller (4) are electromagnetic heating rollers.

4. The preheat flattening structure for a solventless laminator of claim 1, wherein, It also includes a wrap angle adjustment mechanism installed between the two side frames (1). The wrap angle adjustment mechanism includes two side sliders (5). The two ends of the flattening roller (2) are rotatably installed on the two side sliders (5) through bearing seats. The two side frames (1) are respectively provided with slide grooves (6). The top and bottom surfaces of the slide grooves (6) are respectively installed with guide rails (7). The two side sliders (5) are respectively inserted into the two side slide grooves (6). The top and bottom surfaces of the sliders (5) are respectively provided with guide rail grooves (8) for the guide rails (7) to be inserted. A drive plate (9) is installed between the two side sliders (5). A support frame (10) is installed on the back side of the drive plate (9) of the two side frames (1). A cylinder (11) is fixedly installed on the support frame (10). The piston rod of the cylinder (11) is fixedly connected to the drive plate (9).

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