Heat recycling type drying device of film laminating machine

Abstract

The application discloses a heat recycling type drying device of a film laminating machine, which comprises a wallboard, a lower frame, a drying oven, a heating pipe and a drying roller. The lower frame is provided with a heating upper roller and a rubber lower roller which are in rolling contact. The top of the drying oven is connected with an air extractor through an air extraction interface. The air extractor is connected with a heat exchange box. The heat exchange box is composed of an upper heat exchange box and a lower heat exchange box which are in communication. The upper heat exchange box is connected with an air inlet machine through an air outlet interface. The air inlet interface of the air inlet machine is connected with an air inlet of the drying oven. The application has the advantages of convenient operation, high working efficiency, heat energy recycling and reuse, electricity saving, stable heat energy in the drying oven, good film and glue drying effect and favorable paper film laminating.

Description

Technical Field

[0001] This invention relates to printing equipment, and more specifically to a drying device for use in a laminating machine. Background Technology

[0002] Currently, fully automatic laminating machines, belonging to post-press equipment, are specialized printing equipment used for laminating paper and board materials, achieving paper-plastic composite (pressing) to improve paper quality and grade. Previously, the heat from the main unit in its drying device was exhausted through ventilation ducts above the workshop, resulting in wasted heat energy and increased electricity consumption. This heat energy was not recovered or reused, causing unnecessary waste. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a heat recycling drying device for a laminating machine that can recover, recycle, and reuse drying heat, thereby saving energy.

[0004] The objective of this invention is achieved through the following technical solution: a heat recycling drying device for a laminating machine, comprising a wall panel and a lower archway, an oven mounted on the wall panel, heating tubes and drying rollers installed inside the oven, an exhaust port connected to the top of the oven via an exhaust fan, and the exhaust fan connected to a heat exchange box; the heat exchange box consists of an upper exchange box and a lower exchange box that communicate with each other, an exhaust port connected to an intake fan on the upper exchange box via an exhaust port, and the intake port of the intake fan connected to the air inlet on the oven; a heated upper roller and a rubber lower roller connected in a rolling manner are mounted on the lower archway, the heated upper roller is connected to the main rotational power source via an upper roller transmission assembly, and the drying roller is connected to the main rotational power source via a drying transmission assembly.

[0005] The top of the oven is equipped with an exhaust hood via wall panel support rods, and the exhaust port is mounted on the exhaust hood. The upper heat exchange chamber contains lamps; when the ambient temperature is too low, the heating function can be activated to reheat the oven by allowing the heat returned to the upper heat exchange chamber. The lower heat exchange chamber has a water vapor filter unit to separate water vapor from the heat. The lower heat exchange chamber is equipped with an exhaust port, which controls the amount of heat returned to the oven. The oven's air outlet is arc-shaped, corresponding to the surface of the drying rollers.

[0006] With the structure of this invention, excess heat generated by the heating tubes inside the oven is extracted by an exhaust fan through the exhaust port and then sent to the lower heat exchange box. The water vapor separation unit in the lower heat exchange box separates the water vapor and transfers the heat to the upper heat exchange box. The upper heat exchange box is equipped with multiple lamps for heating. The returned hot air is then reinjected into the oven through the air inlet of the fan and the oven's air inlet. This invention is convenient to operate, highly efficient, and achieves heat energy circulation and reuse. It not only saves electricity costs but also keeps the heat energy inside the oven stable, ensuring the drying effect of the film and adhesive and facilitating paper lamination. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the heat recycling drying device of the laminating machine of the present invention.

[0008] Figure 2 for Figure 1 A schematic diagram showing the connection between the wall panels, oven, and drying rollers.

[0009] Figure 3 for Figure 1 A schematic diagram of the structure of the oven, its air outlet, and heating tubes.

[0010] Figure 4 This is a schematic diagram of the installation structure of the present invention (coating machine). Detailed Implementation

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0012] Reference Figures 1 to 4As can be seen, the heat recycling drying device of the paper laminating machine of the present invention includes a wall panel 1 and a lower archway 31. An oven 13 is mounted on the wall panel 1. Several heating tubes 17 and drying rollers 18 (the drying rollers are mounted between the two wall panels) are installed inside the oven 13. The top of the oven 13 is connected to an exhaust fan 5 via an exhaust port 16. The exhaust fan 5 is connected to a heat exchange box. The heat exchange box consists of an upper exchange box 7 and a lower exchange box 3 that are interconnected. An exhaust fan 9 is connected to the upper exchange box 7 via an exhaust port 8. The exhaust fan 9's exhaust port 10 is connected to the air inlet 14 on the oven 13. The bottom of the lower exchange box 3 is mounted on the side of the wall panel 1 via a bracket 2. The exhaust fan 5 is mounted on the side of the lower exchange box 3 and connected via an air outlet 4. The exhaust fan 9 is mounted on the wall panel 1 via an exhaust fan bracket 11. The wall panel 1 (located at the top) and the lower archway 31 (located at the bottom) are connected vertically (for easy splicing, processing, and assembly), with one piece on each side. The lower archway 31 is equipped with a heated upper roller 34 (located at the top) and a rubber lower roller 39 (located at the bottom) connected in a rolling manner. The heated upper roller 34 is connected to the main rotational power source 32 (the main rotational motor, mounted on the lower archway) via an upper roller transmission assembly 38 (a combination of an upper roller transmission chain and sprocket). The drying roller 18 is connected to the main rotational power source 32 via a drying transmission assembly 37 (a combination of a drying transmission chain and sprocket). This achieves a linkage between drying the film and the adhesive on it, and between paper and plastic pressing. This is a conventional setup; the innovation lies in the recycling of drying heat.

[0013] like Figure 1 , Figure 2 As shown, the top of the oven 13 is equipped with an exhaust hood 15 via a wall panel support rod 20, and the exhaust port 16 is mounted on the exhaust hood 15. The upper heat exchange chamber 7 contains lamps; when the ambient temperature is too low, the heating function can be activated to reheat the heat returned to the upper heat exchange chamber. The lower heat exchange chamber 3 has a water vapor filtration unit to separate water vapor from the heat. The lower heat exchange chamber 3 is equipped with an exhaust port 6, which controls the amount of heat returned to the oven. Figure 3 As shown, the air outlet 21 (a number of them, as a whole) of the oven 13 is arc-shaped and corresponds to the roller surface of the drying roller 18.

[0014] As shown in the attached diagram, a film 19 coated with adhesive is mounted on the drying roller 18. Excess heat generated by the heating tube 17 inside the oven 13 is extracted by the exhaust fan 5 through the exhaust port 16, and then sent to the lower exchange box 3 through the air outlet 4 of the exhaust fan 5. The water vapor is separated by the water vapor filtration unit inside the lower exchange box 3, and the heat is then transferred to the upper exchange box 7. The upper exchange box 7 contains multiple lamps. The returned hot air is sent to the air inlet fan 9 through the air outlet 8 of the upper exchange box, and then reinjected into the oven 13 through the air inlet 10 of the air inlet fan and the air inlet 14 of the oven. When the film 19 coated with adhesive passes through the drying roller 18, the heat inside the oven dries the adhesive on the film to a state ready for bonding through the arc-shaped air outlet 21 of the oven, before proceeding to the next paper-plastic bonding process. This achieves the recycling of heat energy and energy saving and stability.

[0015] like Figure 4 As shown, a paper conveying roller 36 is also installed on the lower archway 31, and a film leveling roller 33 (for smooth film conveying) is also installed on the wall panel 1. The paper conveying roller 36 (lower position) and the film leveling roller 33 (upper position) are respectively located on the (left) side of the upper heating roller 34, which is a known technology. After the film 19 is dried in the oven, it is output by the drying roller 18 and then transferred to the film leveling roller 33 to enter between the upper heating roller 34 and the lower rubber roller 39. At the same time, the paper is also conveyed between the upper heating roller 34 and the lower rubber roller 39 by the paper conveying roller 36 (the film is on top and the paper is on the bottom and they are conveyed together). After being heated by the upper heating roller and rolled and conveyed by the lower rubber roller, the paper lamination process (paper-plastic pressing and bonding) is completed.

Claims

1. A heat-recycling drying device for a laminating machine, comprising a wall panel and a lower archway, wherein a drying oven is mounted on the wall panel, and heating tubes and drying rollers are installed inside the drying oven, characterized in that: The top of the oven is connected to an exhaust fan via an exhaust port, and the exhaust fan is connected to a heat exchange box. The heat exchange box consists of an upper exchange box and a lower exchange box that are interconnected. The upper exchange box is connected to an air inlet fan via an air outlet, and the air inlet fan is connected to the air inlet on the oven. The lower frame is equipped with a heating upper roller and a rubber lower roller that are rolled together. The heating upper roller is connected to the main rotational power source via an upper roller transmission assembly, and the drying roller is connected to the main rotational power source via a drying transmission assembly.

2. The heat recycling drying device for the laminating machine as described in claim 1, characterized in that: The top of the oven is equipped with an exhaust hood via wall panel support rods, and the exhaust port is mounted on the exhaust hood.

3. The heat recycling drying device for the laminating machine as described in claim 1, characterized in that: The upper exchange box is equipped with lamp tubes.

4. The heat recycling drying device for the laminating machine as described in claim 1 or 3, characterized in that: The lower exchange box contains a water vapor filtration unit, and the lower exchange box is equipped with an exhaust gas interface.

5. The heat recycling drying device for the laminating machine as described in claim 1 or 2, characterized in that: The air outlet of the oven is arc-shaped and corresponds to the roller surface of the drying roller.

Images