A hot air circulating drying oven for glassine paper

Abstract

The utility model discloses a kind of glazing paper hot air circulation drying oven, including support frame, the upper surface both ends of support frame are evenly with damping type rotation installation has loose release column, the outer surface of loose release column is coiled with glazing paper, and let it from the center part of bellow and be connected at the outer surface of another group of loose release column, bellow is fixedly installed between two groups of loose release column, and one end communication installation has air supply mechanism in bellow.The utility model passes through air supply mechanism, makes its to hot air recycling, let it be heated after mixing with new air again and use, substantially reduce heat waste, compared with the mode of direct discharge after single heating, significantly reduce the energy consumption of electric heating net, meet the energy-saving production demand, and with the help of M-shaped cylinder relatively rotating cross-flow fan drive hot air precision blow in the upper and lower surface of paper sheet, ensure that paper sheet contact temperature uniform hot air.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically a glassine paper hot air circulating drying oven. Background Technology

[0002] Glassine paper, a specialty paper with high smoothness, temperature resistance, and good release properties, plays an indispensable role in many fields such as label printing, food packaging, and pharmaceutical packaging. In its production process, the drying stage is one of the key steps determining product quality.

[0003] Patent CN220169868U discloses a corrugated base paper drying device, including a housing and a conveying assembly installed inside the housing. The housing has upper and lower crossbeams on both the left and right sides. The conveying assembly includes multiple conveying rollers and multiple driven rollers located on and parallel to the conveying rollers. The left and right ends of the multiple conveying rollers are fixed to the lower crossbeams by bearings, and the left and right ends of the multiple driven rollers are fixed to the upper crossbeams by bearings. One end of each conveying roller and driven roller is closed, and the other end is open. A sealed hot air inlet chamber is located on one side of the housing, and the open ends of the conveying rollers and driven rollers are connected to the hot air inlet chamber. This solution heats both the top and bottom surfaces of the corrugated base paper while it is being conveyed by the conveying rollers and driven rollers, achieving rapid drying and energy saving.

[0004] However, the above-mentioned device relies on the heat generated by the conveyor roller and the driven roller, and requires hot air to be introduced from the hot air inlet chamber to heat the roller body. Heat is transferred through direct contact between the roller body and the paper. This contact heating method has obvious limitations: the temperature is concentrated in the contact area between the roller body and the paper. For thinner or more sensitive papers (such as glassine paper), local overheating can easily lead to surface scorching and embrittlement. If the temperature distribution on the roller body surface is uneven and the hot air does not flow smoothly inside the roller, it will directly cause differences in the paper drying effect and result in local drying problems. Utility Model Content

[0005] The purpose of this invention is to provide a glassine paper hot air circulating drying oven to solve the technical problems mentioned in the background art, such as local overheating and embrittlement of thin or sensitive paper caused by contact heating, and differences in paper drying effect and low drying efficiency caused by uneven temperature distribution of the rollers.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A glassine paper hot air circulating drying box includes a support frame. Both ends of the upper surface of the support frame are damped and rotatably mounted with release columns. The outer surface of the release columns is wound with glassine paper, which passes through the center of the air box and is fixedly connected to the outer surface of another set of release columns. The air box is fixedly installed between the two sets of release columns, and an air supply mechanism is connected to one end of the air box.

[0008] As a preferred embodiment of this utility model, the upper and lower surfaces of the air box are connected and installed with a first filter cartridge box, so that the air supply mechanism can draw in external air through the first filter cartridge box and send it into the center of the air box to blow the upper and lower surfaces of the glassine paper.

[0009] As a preferred embodiment of this utility model, the air supply mechanism includes an M-shaped cylinder, which is connected to one end of the air box. Two sets of cross-flow fans are rotatably mounted in the M-shaped cylinder in a vertically opposite manner. The rotating shafts at one end of the two sets of cross-flow fans are fixedly connected to the output shafts of motors, and the two sets of motors are fixedly mounted at one end of the M-shaped cylinder. The two sets of motors control the two sets of cross-flow fans to rotate relative to each other in the M-shaped cylinder.

[0010] As a further embodiment of this utility model, two sets of partition plates are fixedly installed inside the air box, and a circulating air duct is formed between the two sets of partition plates and the inner ring wall of the air box. An electric heating mesh is fixedly installed inside this circulating air duct. The electric heating mesh is opposite to and connected to the first filter cartridge box, and the position between the two sets of partition plates allows glassine paper to pass through it.

[0011] As a further embodiment of this utility model, a second filter cartridge box is connected and installed at the other end of the bellows. This second filter cartridge box is located between two sets of partition plates, so that after the hot air blows over the surface of the glassine paper, some of the airflow will carry water vapor and be discharged from the bellows through the second filter cartridge box.

[0012] As a further preferred embodiment of this utility model, one end of the two sets of circulating air ducts is opposite to the air intake end of the two sets of cross-flow fans, while the exhaust end of the two sets of cross-flow fans is opposite to the position between the two sets of partition plates and is distributed vertically.

[0013] Compared with the prior art, the beneficial effects of this utility model of a glassine paper hot air circulating drying oven are as follows:

[0014] 1. Ensure stable paper feeding to lay the foundation for uniform drying:

[0015] With the cooperation of two sets of unwinding columns, the glassine paper is wound onto the starting unwinding column and passes through the bellows to connect to the other set of unwinding columns. Under the rotational traction of the first set of unwinding columns, the paper passes through the center of the bellows at a stable speed. The damping force provided by the unwinding columns during the unwinding process effectively ensures that the paper remains flat and smooth during drying, avoiding wrinkles or loosening. This creates favorable conditions for the subsequent uniform application of hot air to the paper surface, ensuring the uniformity of drying from the source of the conveying process.

[0016] 2. Achieve precise hot air blowing to improve drying efficiency:

[0017] The hot air supply system achieves precise heating of the paper through a multi-layer design: the first filter cartridge box is installed on the upper and lower surfaces of the air box, filtering impurities in the air and guiding the air directionally into the air box; the air heated by the air supply mechanism is delivered to the central area of ​​the air box and then divided into two layers to precisely blow across the upper and lower surfaces of the glassine paper, ensuring full contact between the hot air and the paper surface. This layered blowing design increases the heat transfer area, accelerates the heat absorption and evaporation of moisture inside the paper, significantly improves drying efficiency, and can quickly remove moisture from the glassine paper.

[0018] 3. Construct an efficient thermal cycle system to improve energy utilization:

[0019] During the drying process, a portion of the airflow carrying moisture is discharged from the second filter cartridge box, while the remaining airflow returns to the air supply mechanism. There, it mixes with newly drawn-in air, is reheated, and then delivered to the paper surface. Simultaneously, the combination of the M-shaped cylinder, the cross-flow fan, and the circulating air duct further enhances heat circulation: the circulating air duct, formed by partitions and the inner wall of the air chamber, allows undischarged hot air to return to the circulating air duct under the impetus of subsequent airflow. There, it mixes with the fresh air entering from the first filter cartridge box, is reheated by the electric heating grid, and then delivered to the paper surface by the cross-flow fan. This heat recovery design significantly reduces heat waste, lowers the energy consumption of the heating equipment, meets the requirements of energy-saving production, and maintains a relatively stable temperature within the air chamber, providing a continuous and suitable environment for drying.

[0020] 4. Optimize hot air distribution to improve drying quality:

[0021] Two sets of cross-flow fans rotate relative to each other under the drive of a motor, enhancing the turbulence and mixing effect of the airflow, allowing the airflow to enter the circulating air duct more evenly. After the hot air is discharged from the exhaust end of the cross-flow fans, because the exhaust end and the partition plates are positioned opposite each other and distributed vertically, it can be precisely blown onto the upper and lower surfaces of the glassine paper passing between the two sets of partition plates, ensuring that every part of the paper comes into contact with uniformly heated air. This design fundamentally solves the problem of localized overheating or under-drying in traditional drying, reducing quality defects such as embrittlement and deformation caused by uneven heating of the paper, and ensuring the drying quality of the glassine paper. V. Enhanced air purification to ensure paper cleanliness.

[0022] 5. The first filter cartridge box filters the external air entering the system to remove impurities and prevent them from adhering to the surface of the glassine paper and affecting its quality. The second filter cartridge box can also further filter residual impurities when it discharges the airflow carrying moisture, ensuring that the discharged gas is clean and preventing external pollutants from entering the air box in reverse, thus providing a clean environment for paper drying.

[0023] In summary, this invention improves the drying efficiency and quality of glassine paper while significantly reducing energy consumption through stable paper feeding, precise hot air blowing, efficient heat circulation, and uniform hot air distribution, thus balancing production efficiency with energy conservation and environmental protection requirements. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the airflow path of the air supply mechanism in the air box in an embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the air supply mechanism in an embodiment of the present invention.

[0028] Reference numerals: 1. Support frame; 101. Loosening column; 102. Air box; 103. First filter cartridge box; 104. Second filter cartridge box; 2. Air supply mechanism; 201. M-shaped cylinder; 202. Cross-flow fan; 203. Circulating air duct; 204. Partition plate; 205. Electric heating mesh; 206. Motor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present invention should be understood according to the specific circumstances.

[0032] Referring to Figure 1, an embodiment of the present invention provides a glassine paper hot air circulating drying box, which includes a support frame 1. Both ends of the upper surface of the support frame 1 are damped and rotatably mounted with release columns 101. The outer surface of the release column 101 is wound with glassine paper, which passes through the center of the air box 102 and is fixedly connected to the outer surface of another set of release columns 101. The air box 102 is fixedly installed between the two sets of release columns 101, and an air supply mechanism 2 is connected to one end of the air box 102.

[0033] The upper and lower surfaces of the air box 102 are connected to the first filter cartridge box 103, so that the air supply mechanism 2 can draw in external air through the first filter cartridge box 103 and send it into the center of the air box 102 to blow the upper and lower surfaces of the glassine paper.

[0034] When drying glassine paper, the above-mentioned technical solution can wind the glassine paper to be dried around the outer surface of the starting end release column 101 and let it pass through the center of the bellows 102 and connect to the outer surface of another set of release columns 101. This allows the glassine paper to be pulled out from the center of the bellows 102 at a stable speed under the traction of the rotation of one set of release columns 101. The damping force of the release column 101 during the unwinding process ensures that the paper remains flat and stretched during the drying process, providing a basis for uniform drying.

[0035] When the glassine paper enters the air box 102, the air supply mechanism 2 can be activated to draw in and heat external air through the first filter cartridge box 103. The first filter cartridge box 103 is installed on the upper and lower surfaces of the air box 102, which can both filter impurities in the air and guide the air directionally into the air box 102. The air heated by the air supply mechanism 2 is delivered to the central area of ​​the air box 102 and divided into two layers to precisely blow on the upper and lower surfaces of the glassine paper. When the hot air comes into contact with the paper surface, the moisture inside the paper absorbs heat and evaporates into water vapor through heat transfer, which is then carried away by the continuously flowing airflow. A portion of the airflow carrying moisture is discharged from the second filter cartridge box 104 into the air box 102, while the remaining airflow flows back into the air supply mechanism 2 and mixes with the newly drawn-in air. It is then reheated and transported to the upper and lower surfaces of the glassine paper for purging and drying. This process not only reduces heat waste and improves energy efficiency, but also keeps the temperature inside the air box 102 relatively stable, providing a continuous and suitable environment for drying. This efficiently removes moisture from the glassine paper and achieves the drying purpose. The dried glassine paper can then be wound around the outer surface of another set of loosening columns 101.

[0036] See Figures 2-3 As shown, the air supply mechanism 2 includes an M-shaped cylinder 201, which is connected to one end of the air box 102. Two sets of cross-flow fans 202 are rotatably mounted in the M-shaped cylinder 201 in a vertically opposite manner. The rotating shafts at one end of the two sets of cross-flow fans 202 are fixedly connected to the output shaft of the motor 206. The two sets of motors 206 are fixedly mounted at one end of the M-shaped cylinder 201. The two sets of motors 206 control the two sets of cross-flow fans 202 to rotate relative to each other in the M-shaped cylinder 201.

[0037] Two sets of partition plates 204 are fixedly installed inside the air box 102. A circulating air duct 203 is formed between the two sets of partition plates 204 and the inner ring wall of the air box 102. An electric heating mesh 205 is fixedly installed inside this circulating air duct 203. The electric heating mesh 205 is opposite to and connected to the first filter cartridge box 103. The space between the two sets of partition plates 204 is for glassine paper to pass through.

[0038] The other end of the air box 102 is connected to a second filter cartridge box 104, which is located between two sets of partition plates 204. This allows the hot air to blow over the surface of the glassine paper, and some of the airflow carrying water vapor will be discharged from the air box 102 through the second filter cartridge box 104.

[0039] One end of each of the two sets of circulating air ducts 203 is opposite to the intake end of each of the two sets of cross-flow fans 202, while the exhaust end of each of the two sets of cross-flow fans 202 is opposite to the position between the two sets of partition plates 204 and is distributed vertically.

[0040] The motor 206 starts and drives the two sets of cross-flow fans 202, which are vertically opposite each other inside the M-shaped cylinder 201, to rotate relative to each other. This relative rotation enhances the turbulence and mixing of the airflow, allowing it to enter subsequent stages more evenly. When the cross-flow fans 202 are running, their intake ends draw air in from one end of the opposing circulation duct 203. The circulation duct 203 is formed by the two sets of partition plates 204 inside the air box 102 and the inner ring wall of the air box 102. The electric heating mesh 205 inside the circulation duct 203 is opposite to and connected to the first filter cartridge box 103, thus enabling… Outside air is filtered through the first filter cartridge box 103 and then enters the circulating air duct 203. It is heated by the electric heating mesh 205 to form hot air, which is then expelled from the exhaust end by the cross-flow fan 202. Because the exhaust ends of the two sets of cross-flow fans 202 are positioned opposite to and vertically distributed between the two sets of partition plates 204, the hot air is precisely blown onto the upper and lower surfaces of the glassine paper passing between the two sets of partition plates 204. This ensures that the hot air contacts the surface of the glassine paper, guaranteeing that every part of the paper receives uniformly heated air, fundamentally solving the problem of localized overheating or... To address the issue of insufficient drying, this method reduces quality defects such as embrittlement and deformation caused by uneven heating of the paper. Through heat transfer, the internal moisture of the paper absorbs heat and evaporates into water vapor. After the hot air blows through the glassine paper, some of the water vapor-laden airflow exits from the second filter cartridge box 104, located between the two sets of partition plates 204, thus preventing water vapor from accumulating in the air box 102 and affecting the drying effect. The remaining hot air is then pushed back into the circulating air duct 203 by the subsequent incoming airflow, where it is reheated by the electric heating mesh 205 and mixed with the newly entered air. The air is drawn in by the cross-flow fan 202 and transported to the surface of the glassine paper, circulating repeatedly to continuously dry the glassine paper until the ideal dryness is achieved. The cooperation between the circulating air duct 203 and the electric heating net 205 forms a highly efficient heat recovery system, allowing the unexhausted hot air to flow back to the circulating air duct 203 under the push of the subsequent airflow. After mixing with the fresh air entering through the first filter cartridge box 103, it is heated again. This design greatly reduces heat waste. Compared with the mode of direct discharge after single heating, it can significantly reduce the energy consumption of the electric heating net 205, which meets the requirements of energy-saving production.

[0041] Based on the above technical solution, the working steps of this solution are summarized as follows: When drying glassine paper, the glassine paper to be dried can be wound around the outer surface of the starting end release column 101 and passed through the center of the bellows 102 and connected to the outer surface of another set of release columns 101. This allows the glassine paper to be pulled out from the center of the bellows 102 at a stable speed under the traction of the rotation of one set of release columns 101. The damping force of the release columns 101 during the unwinding process ensures that the paper remains flat and spread out during drying, providing a foundation for uniform drying. When the glassine paper... After the paper enters the air box 102, the motor 206 can be started to drive the two sets of cross-flow fans 202, which are vertically opposite to each other inside the M-shaped cylinder 201, to rotate relative to each other. This relative rotation enhances the turbulence and mixing effect of the airflow, allowing the airflow to enter the subsequent stages more evenly. When the cross-flow fan 202 is running, its suction end draws in airflow from one end of the opposite circulation duct 203. The circulation duct 203 is formed by the two sets of partition plates 204 inside the air box 102 and the inner ring wall of the air box 102. The electric heating mesh 205 inside the circulation duct 203 is connected to the first filter cartridge. The boxes 103 are opposite and connected, allowing outside air to enter the circulating air duct 203 after being filtered by the first filter cartridge box 103. The air is then heated by the electric heating mesh 205 to form hot air, which is then expelled from the exhaust end by the cross-flow fan 202. Because the exhaust ends of the two sets of cross-flow fans 202 are positioned opposite to and vertically distributed between the two sets of partition plates 204, the hot air is precisely blown onto the upper and lower surfaces of the glassine paper passing between the two sets of partition plates 204. Through heat transfer, the moisture inside the paper absorbs heat and evaporates into water vapor. After the hot air sweeps across the glassine paper, some of the water vapor is evaporated. The airflow carrying moisture will be discharged from the second filter cartridge box 104 located between the two sets of partition plates 204 to the air box 102, so as to avoid the accumulation of moisture in the air box 102 and affect the drying effect. The remaining hot air will be driven back to the circulating air duct 203 by the subsequent incoming airflow, and will be reheated by the electric heating grid 205. At the same time, it will be mixed with the newly entered air and then drawn in by the cross-flow fan 202 and delivered to the surface of the glassine paper. This cycle is repeated to achieve continuous drying of the glassine paper. The dried glassine paper can then be wound around the outer surface of another set of loosening columns 101.

[0042] In summary, this utility model embodiment utilizes the recycling of hot air, allowing it to mix with fresh air before being reheated and reused. This design significantly reduces heat waste. Compared to the mode of direct discharge after a single heating, it can significantly reduce the energy consumption of the electric heating grid 205, meeting the requirements of energy-saving production. Furthermore, the cross-flow fan 202, which rotates relatively inside the M-shaped cylinder, drives the hot air to be precisely blown onto the upper and lower surfaces of the paper, ensuring that every part of the paper can come into contact with uniformly heated air, fundamentally solving the problem of localized overheating or insufficient drying in traditional drying methods.

[0043] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. A glassine paper hot air circulating drying oven, characterized in that: Includes a support frame (1), on both ends of the upper surface of the support frame (1) are damped and rotatably mounted with release columns (101), and a bellows (102) is fixedly installed between two sets of release columns (101). One end of the bellows (102) is connected to a blower mechanism (2). The outer surface of the release column (101) is wrapped with glassine paper, which passes through the center of the bellows (102) and is fixedly connected to the outer surface of another set of release columns (101).

2. The glassine paper hot air circulating drying oven according to claim 1, characterized in that: The upper and lower surfaces of the air box (102) are connected to the first filter cartridge box (103), so that the air supply mechanism (2) can draw in external air through the first filter cartridge box (103) and send it into the center of the air box (102) to blow the upper and lower surfaces of the glassine paper.

3. The glassine paper hot air circulating drying oven according to claim 1, characterized in that: The air supply mechanism (2) includes an M-shaped cylinder (201), which is connected to one end of the air box (102). Two sets of cross-flow fans (202) are rotatably installed in the M-shaped cylinder (201) in a vertically opposite manner. The rotating shafts at one end of the two sets of cross-flow fans (202) are fixedly connected to the output shaft of the motor (206). The two sets of motors (206) are fixedly installed at one end of the M-shaped cylinder (201). The two sets of motors (206) control the two sets of cross-flow fans (202) to rotate relative to each other in the M-shaped cylinder (201).

4. A glassine paper hot air circulating drying oven according to claim 3, characterized in that: Two sets of partition plates (204) are fixedly installed inside the air box (102). A circulating air duct (203) is formed between the two sets of partition plates (204) and the inner ring wall of the air box (102). An electric heating mesh (205) is fixedly installed inside the circulating air duct (203). The electric heating mesh (205) is opposite to and connected to the first filter cartridge box (103). The position between the two sets of partition plates (204) allows glassine paper to pass through it.

5. A glassine paper hot air circulating drying oven according to claim 4, characterized in that: The other end of the air box (102) is connected to a second filter cartridge box (104), which is located between two sets of partition plates (204). This allows hot air to be blown over the surface of the glassine paper, and some of the airflow carrying water vapor will be discharged from the air box (102) through the second filter cartridge box (104).

6. A glassine paper hot air circulating drying oven according to claim 4, characterized in that: One end of each of the two sets of circulating air ducts (203) is opposite to the intake end of each of the two sets of cross-flow fans (202), and the exhaust end of each of the two sets of cross-flow fans (202) is opposite to the position of each of the two sets of partition plates (204) and is distributed vertically.

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