A plastic plate drying device

Abstract

The present disclosure relates to the technical field of plastic plate processing, and an embodiment of the present disclosure provides a plastic plate drying device, which comprises a shell and a supporting base, the supporting base is arranged at the bottom of the shell, a top cover is arranged at the top of the shell, a conveying and drying assembly is arranged in the shell and the top cover, a surface cleaning assembly is arranged on the shell and the top cover, and an exhaust assembly is arranged in the shell. The surface cleaning assembly comprises a pair of horizontal plates, the horizontal plates are horizontally and transversely fixed in the shell, a plurality of rotating shafts are vertically and rotatably connected in the pair of horizontal plates through rotating shafts, and brush discs are arranged at one end of the rotating shafts. Through the above technical scheme, the technical problem that the conventional plastic plate drying device only has a single drying function and does not have cleaning and surface flattening effects is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of plastic sheet processing, and more specifically, to a plastic sheet drying apparatus. Background Technology

[0002] In the plastic product processing industry, plastic sheets (such as PVC sheets and acrylic sheets) need to undergo drying after molding to remove moisture and residual solvents absorbed during production. This prevents defects such as cracking and bubbles from occurring during subsequent cutting and welding, ensuring the flatness and structural stability of the plastic sheets. As the application scenarios for plastic sheets expand to areas such as precision instrument housings and decorative panels, the requirements for surface cleanliness and flatness have significantly increased. However, traditional plastic sheet drying equipment generally suffers from the significant drawback of only having a single drying function and lacking cleaning and surface leveling effects, severely restricting the quality of finished plastic sheets and the efficiency of subsequent processing. Traditional drying equipment mostly uses hot air circulating ovens or conveyor belt drying structures, which can only remove moisture from the surface of plastic sheets through high-temperature airflow. During the production and transportation process, plastic sheets easily absorb dust, debris and other impurities. These impurities will adhere to the surface of the sheet when heated during the drying process, forming stubborn stains that need to be manually wiped clean with alcohol afterward. This not only increases the process cost, but may also scratch the surface of the plastic sheet due to uneven wiping force. Some small impurities may even become embedded in the plastic sheet that has not been completely cooled. Therefore, the development of a plastic sheet drying device that combines drying, cleaning, and surface leveling functions has become an urgent need for the industry to improve product quality and simplify production processes. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a plastic sheet drying device, which solves the technical problem that traditional plastic sheet drying devices in the prior art generally only have a single drying function and do not have cleaning and surface leveling effects.

[0004] According to one aspect, at least one embodiment of the present disclosure provides a plastic sheet drying apparatus, comprising: The housing and the supporting base, wherein the supporting base is disposed at the bottom of the housing; A top cover and a conveying and drying assembly, wherein the top cover is disposed at the top of the housing, and the conveying and drying assembly is disposed within the housing and the top cover; A surface cleaning assembly, wherein the surface cleaning assembly is disposed on the housing and the top cover; An exhaust assembly, wherein the exhaust assembly is disposed within the housing; The surface cleaning assembly includes a pair of horizontal plates, both of which are horizontally fixed inside the housing. Each pair of horizontal plates is vertically connected to several rotating shafts via rotating shafts, and each rotating shaft has a brush disc at one end.

[0005] As a further technical solution, one of the rotating shafts on the pair of horizontal plates is driven to rotate by electricity, and each rotating shaft is provided with a transmission gear, which meshes with each other. A flattening roller is horizontally rotatably connected inside the outer shell.

[0006] According to another aspect, in at least one embodiment of the present invention, the conveying and drying assembly includes a pair of conveyor belts, both of which are disposed inside the housing, the pair of conveyor belts being located on both sides of the cross plate, and a pair of air hoods being fixedly connected inside the housing.

[0007] As a further technical solution, the air hoods are located at the top and inside of the conveyor belt, and a number of air holes are opened on both opposite surfaces of the pair of air hoods. A number of heating tubes are installed inside the air hoods, and an air inlet pipe is provided on one side of each air hood.

[0008] According to another aspect, in at least one embodiment of the present invention, the exhaust assembly includes two pairs of exhaust pipes, which are respectively disposed at the upper and lower ends of the housing. The two pairs of exhaust pipes are respectively higher than and lower than the conveyor belt. Each exhaust pipe has a plurality of suction holes on its surface. A suction pipe is disposed on the outer side of the housing, and the suction pipe is connected to all the suction pipes.

[0009] As a further technical solution, curtains are installed on both sides of the top cover.

[0010] As a further technical solution, the surface of the conveyor belt corresponding to the position of the air hood has a mesh-like hollow structure.

[0011] As a further technical solution, the flattening roller is located at the upper end of the drive shaft portion of the conveyor belt, and the distance between the flattening roller and the surface of the conveyor belt matches the thickness of the plastic sheet.

[0012] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the surface cleaning assembly, through a combined design of double-sided brushing and leveling, solves the problems of traditional drying devices being unable to remove impurities from the surface of plastic sheets and difficult to correct warping. The brush discs rotate synchronously to clean both sides of the plastic sheet, thoroughly removing dust and debris and preventing impurities from adhering to the surface due to heat. The flattening roller applies pressure adapted to the thickness of the plastic sheet, correcting surface warping and ensuring a flat surface. This structure eliminates the need for additional manual cleaning or leveling processes, reducing production steps and labor costs, while ensuring the cleanliness and flatness of the plastic sheet surface. This provides a high-quality substrate for subsequent processing, avoids finished product defects caused by impurities or warping, and improves the processing quality of the plastic sheet. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle; In the diagram: 1. Outer shell; 2. Support base; 3. Top cover; 4. Surface cleaning assembly; 4-1. Horizontal plate; 4-2. Rotating shaft; 4-3. Brush disc; 4-4. Transmission gear; 4-5. Flattening roller; 5. Conveying and drying assembly; 5-1. Conveyor belt; 5-2. Air hood; 5-3. Air hole; 5-4. Air inlet pipe; 5-5. Heating tube; 6. Exhaust assembly; 6-1. Exhaust pipe; 6-2. Suction hole; 6-3. Suction pipe; 7. Baffle curtain. Detailed Implementation

[0015] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0016] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0017] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0018] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 this disclosure.

[0020] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] like Figures 1-4 As shown, a plastic sheet drying apparatus according to an embodiment of the present disclosure is illustrated, comprising: The housing 1 and the supporting base 2 are disposed at the bottom of the housing 1; The top cover 3 and the conveying and drying assembly 5 are provided. The top cover 3 is disposed at the top inside the outer shell 1, and the conveying and drying assembly 5 is disposed inside the outer shell 1 and the top cover 3. Surface cleaning component 4, which is disposed on the outer shell 1 and the top cover 3; Exhaust assembly 6, which is disposed in the housing 1; The surface cleaning assembly 4 includes a pair of horizontal plates 4-1, both of which are horizontally fixed inside the housing 1. Each pair of horizontal plates 4-1 is vertically connected to several rotating shafts 4-2 via rotating shafts 4-2. Each rotating shaft 4-2 has a brush disc 4-3 at one end. One of the rotating shafts 4-2 on the pair of horizontal plates 4-1 is electrically driven to rotate. Each rotating shaft 4-2 is provided with a transmission gear 4-4, which mesh with each other. A flattening roller 4-5 is horizontally rotatably connected inside the housing 1.

[0022] In some examples, to achieve the cleaning of dust and debris from both the upper and lower surfaces of the plastic sheet, and to correct the warping of the plastic sheet surface using the flattening roller 4-5, thus providing a clean and flat plastic sheet substrate for the subsequent drying process, a surface cleaning component 4 is designed. This component includes a pair of horizontally fixed horizontal plates 4-1 inside the outer shell 1, symmetrically distributed vertically, corresponding to the upper and lower surfaces of the plastic sheet respectively, providing mounting support for the rotating shaft 4-2 and the brush disc 4-3. Several rotating shafts 4-2 are vertically connected inside the horizontal plates 4-1 via the rotating shafts 4-2, and are evenly arranged along the length of the horizontal plates 4-1. The brush disc 4-3 at one end of the rotating shaft 4-2 uses soft and wear-resistant bristles to avoid scratching the surface of the plastic sheet, and the positions of the brush discs 4-3 on the upper and lower horizontal plates 4-1 correspond one-to-one to ensure that both sides of the plastic sheet can be cleaned simultaneously.

[0023] One of the rotating shafts 4-2 on a pair of horizontal plates 4-1 is connected to an external electric drive unit (such as a geared motor) to provide power for the cleaning brush. The transmission gears 4-4 on all rotating shafts 4-2 mesh with each other. When the rotating shaft 4-2 is driven to rotate, it drives the other rotating shafts 4-2 to rotate synchronously in the same direction through gear transmission, thereby causing all the brush discs 4-3 to rotate synchronously and form a continuous cleaning area. When the plastic sheet passes through, the double-sided brush discs 4-3 can completely sweep away the dust and debris attached to the surface, preventing impurities from being heated and adhering to the surface of the plastic sheet during the subsequent drying process, which would affect the product quality.

[0024] The flattening roller 4-5, which is horizontally rotatably connected inside the outer casing 1, is located downstream of the brush disc 4-3. Its axis is perpendicular to the conveying direction of the plastic sheet. The roller surface is smooth and has a certain degree of elasticity. It can apply uniform pressure to the plastic sheet during the conveying process, correct the slight warping and wrinkles of the plastic sheet caused by storage or previous processing, keep the surface of the plastic sheet flat, and ensure that the plastic sheet is in uniform contact with the hot air in the subsequent drying process, thereby improving the drying efficiency and uniformity.

[0025] During operation, the plastic sheet is first cleaned on both sides by upper and lower brush discs 4-3, and then flattened by pressing rollers 4-5. Transmission gears 4-4 ensure synchronous rotation of the brush discs 4-3, and the pressing rollers 4-5 automatically adjust pressure according to the thickness of the plastic sheet. Double-sided cleaning ensures cleanliness, and flattening improves flatness. All components work together to provide a high-quality substrate for the drying process, meeting the requirements for a clean and flat plastic sheet.

[0026] like Figures 1-4As shown in the figure, the conveying and drying assembly 5 in this embodiment includes a pair of conveyor belts 5-1, both of which are disposed inside the outer shell 1. The pair of conveyor belts 5-1 are respectively located on both sides of the horizontal plate 4-1. A pair of air hoods 5-2 are fixedly connected inside the outer shell 1. The air hoods 5-2 are respectively located on the top and inside of the conveyor belts 5-1. A plurality of air holes 5-3 are opened on both opposite surfaces of the pair of air hoods 5-2. A plurality of heating tubes 5-5 are installed inside the air hoods 5-2. An air inlet pipe 5-4 is provided on one side of each air hood 5-2.

[0027] In some examples, in order to achieve continuous and stable conveying and efficient drying of plastic sheets, avoid deviation or uneven drying during conveying, adapt to the requirements of drying efficiency and quality in batch processing of plastic sheets, and ensure that the moisture content of the plastic sheets meets the standard and the performance is stable after drying, a conveying and drying component 5 is designed. This component includes a pair of conveyor belts 5-1 inside the outer shell 1, located on both sides of the horizontal plate 4-1 to form a conveying path. The surface of the conveyor belts 5-1 is made of anti-slip material and is driven by a synchronous drive device (such as a motor or chain) to ensure that the two conveyor belts 5-1 rotate at the same speed. When the plastic sheets are placed on the conveyor belts 5-1, they can move smoothly and avoid deviation or wrinkling of the plastic sheets due to the speed difference of the conveyor belts 5-1.

[0028] The conveyor belts 5-1 correspond to the upstream and downstream of the surface cleaning component 4, respectively. The upstream conveyor belt 5-1 transports the plastic sheet to be processed to the cleaning component, and the downstream conveyor belt 5-1 transports the cleaned plastic sheet to the drying area and then to the outside of the device, thus realizing continuous production.

[0029] A pair of air hoods 5-2 are fixedly connected inside the outer shell 1, located at the top and inside of the conveyor belt 5-1 respectively, forming a wrap-around drying area for the upper and lower surfaces of the plastic sheet; several air holes 5-3 are evenly distributed on the two surfaces of the air hoods 5-2 to ensure that hot air can be blown evenly to both sides of the plastic sheet, avoiding local over-drying or under-drying.

[0030] Several heating tubes 5-5 inside the air hood 5-2 are connected to an external power source via wires. When powered on, they can heat up quickly, heating the air inside the air hood 5-2 to form hot air. The air inlet pipe 5-4 on one side of the air hood 5-2 is connected to an external blower, which can continuously supply cold air into the air hood 5-2. The cold air is heated by the heating tubes 5-5 and becomes hot air, which is blown from the air hole 5-3 onto the surface of the plastic sheet, removing the moisture from the plastic sheet and achieving drying.

[0031] The combined effect of the upper and lower air hoods 5-2 allows the plastic sheet to be exposed to hot air on both sides simultaneously, significantly shortening the drying time and improving drying efficiency; at the same time, the air hoods 5-2 can concentrate the hot air, reduce heat loss, and lower energy consumption.

[0032] During operation, the conveyor belt 5-1 carries the plastic sheet between the upper and lower air hoods 5-2. The heating tube 5-5 heats the air, and the air inlet pipe 5-4 introduces the airflow. Hot air is blown onto both sides of the plastic sheet through the air holes 5-3. The conveyor belt 5-1 continuously conveys the plastic sheet, ensuring that it remains in the air hood 5-2 for a sufficient time to complete drying. Stable conveying ensures continuous production, and double-sided hot air achieves efficient and uniform drying. All components work together to meet the requirements of stable conveying and efficient drying of the plastic sheet.

[0033] like Figures 1-4 As shown in the figure, the exhaust assembly 6 in this embodiment includes two pairs of exhaust pipes 6-1. The two pairs of exhaust pipes 6-1 are respectively disposed at the upper and lower ends of the outer shell 1. The two pairs of exhaust pipes 6-1 are higher and lower than the conveyor belt 5-1, respectively. Each exhaust pipe 6-1 has a plurality of suction holes 6-2 on its surface. A suction pipe 6-3 is disposed on the outer side of the outer shell 1. The suction pipe 6-3 is connected to all the suction pipes 6-3.

[0034] In some examples, in order to quickly remove dust and debris generated during the cleaning process of the plastic sheet and moisture generated during the drying process, and to prevent dust from accumulating inside the housing 1 and affecting equipment operation or contaminating the plastic sheet, and to prevent moisture retention from causing secondary damage to the plastic sheet, an exhaust assembly 6 is designed. This assembly includes two pairs of exhaust pipes 6-1 at the upper and lower ends inside the housing 1, which are higher and lower than the conveyor belt 5-1, respectively, forming a complete coverage of the upper and lower areas of the plastic sheet. The upper exhaust pipe 6-1 can suck up the dust generated by the surface cleaning assembly 4 and the moisture that diffuses upward during the drying process, while the lower exhaust pipe 6-1 can suck up the debris that falls below the conveyor belt 5-1 and the moisture that diffuses downward, preventing dust and moisture from accumulating in dead corners inside the housing 1.

[0035] Several suction holes 6-2 are evenly distributed on the surface of the exhaust pipe 6-1 to increase the suction area and ensure that dust and moisture in different locations inside the outer shell 1 can be effectively sucked in. The suction pipe 6-3 on the outside of the outer shell 1 is connected to all the exhaust pipes 6-1. The other end of the suction pipe 6-3 is connected to an external negative pressure device (such as a vacuum pump or exhaust fan). Under the action of negative pressure, dust, debris and moisture inside the outer shell 1 enter the exhaust pipe 6-1 through the suction holes 6-2, and are then discharged to external treatment equipment (such as a dust collector or dehumidifier) ​​through the suction pipe 6-3, so as to achieve centralized treatment of dust and moisture and avoid direct discharge that pollutes the environment.

[0036] Multi-channel coordinated suction can quickly reduce the dust concentration and humidity inside the outer casing 1, ensuring that the dried plastic sheet will not absorb moisture again due to ambient humidity, while reducing dust adhesion to equipment components (such as conveyor belt 5-1 and air hood 5-2), thus reducing the frequency of equipment maintenance.

[0037] During operation, the negative pressure equipment starts, and the exhaust pipe 6-1 sucks in dust and moisture from inside the outer casing 1 through the suction hole 6-2, and discharges it through the suction pipe 6-3. Continuous exhaust during cleaning and drying ensures a clean and dry environment inside the outer casing 1. Multi-position coverage ensures comprehensive suction, and centralized discharge achieves environmentally friendly treatment. All components work together to complete the suction and discharge of dust and moisture, ensuring both effective drying and a clean working environment.

[0038] For example, such as Figure 1 As shown, curtains 7 are installed on both sides of the top cover 3.

[0039] In some examples, the baffles 7 installed on both sides of the top cover 3 are made of high-temperature resistant and flexible materials (such as silicone cloth or canvas), which can naturally fall to cover the gap between the top cover 3 and the outer shell 1. When the plastic sheet enters the top cover 3 through the baffles 7, the baffles 7 can reduce the loss of hot air from the top cover 3 without obstructing the conveying process, maintain a stable internal drying temperature environment, reduce energy consumption, and avoid affecting the uniformity of plastic sheet drying due to temperature fluctuations.

[0040] For example, such as Figure 3 As shown, the surface of the conveyor belt 5-1, which corresponds to the position of the air hood 5-2, has a mesh-like perforated structure.

[0041] In some examples, the surface of the conveyor belt 5-1 corresponding to the position of the air hood 5-2 has a mesh-like perforated structure. This design allows the hot air inside the air hood 5-2 to penetrate the mesh of the conveyor belt 5-1 and act directly on the bottom surface of the plastic sheet. This breaks the traditional solid conveyor belt 5-1's obstruction of hot air, allowing both sides of the plastic sheet to fully contact the hot air, greatly improving heat exchange efficiency and shortening drying time.

[0042] For example, such as Figure 3 As shown, the flattening roller 4-5 is located at the upper end of the drive shaft portion of the conveyor belt 5-1, and the distance between the flattening roller 4-5 and the surface of the conveyor belt 5-1 matches the thickness of the plastic sheet.

[0043] In some examples, the flattening roller 4-5 is located at the upper end of the drive shaft portion of the conveyor belt 5-1. This position is designed to allow the pressure applied by the flattening roller 4-5 to be transmitted more evenly to the plastic sheet by means of the support of the drive shaft on the conveyor belt 5-1, avoiding uneven flattening force due to deformation of the conveyor belt 5-1 and ensuring a flat surface of the plastic sheet.

[0044] In actual use: The plastic sheet to be dried is placed on the upstream conveyor belt 5-1 of the conveying and drying component 5. The conveyor belt 5-1 carries the plastic sheet into the outer shell 1. First, it passes through the surface cleaning component 4. One of the rotating shafts 4-2 is electrically driven, and through the transmission gear 4-4, all rotating shafts 4-2 rotate synchronously. The brush discs 4-3 of the upper and lower horizontal plates 4-1 clean both sides of the plastic sheet to remove surface dust and debris. After cleaning, the plastic sheet continues to be conveyed to the bottom of the flattening roller 4-5. The flattening roller 4-5 applies uniform pressure to the plastic sheet to correct slight warping and make its surface flat. Then, the plastic sheet enters the downstream conveyor belt 5-1, passes under the top cover 3, and the heating tube 5-5 in the air cover 5-2 is energized to heat up. Airflow is introduced through the air inlet pipe 5-4, and hot air is blown evenly to both sides of the plastic sheet through the air holes 5-3. At the same time, the exhaust component 6 is activated. Under the negative pressure, the dust and moisture in the outer shell 1 are discharged through the suction holes 6-2 of the exhaust pipe 6-1 into the suction pipe 6-3. After drying, the plastic sheet is conveyed to the outside of the outer shell 1 by the conveyor belt 5-1. The baffles 7 on both sides of the top cover 3 can reduce the loss of hot air, realizing the integrated processing of plastic sheet cleaning, leveling and drying throughout the process.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A plastic sheet drying device, characterized in that, include: The outer casing (1) and the supporting base (2) are disposed at the bottom of the outer casing (1); The top cover (3) and the conveying and drying assembly (5) are provided, wherein the top cover (3) is disposed at the top inside the housing (1), and the conveying and drying assembly (5) is disposed inside the housing (1) and the top cover (3); A surface cleaning assembly (4) is disposed on the outer shell (1) and the top cover (3); An exhaust assembly (6) is disposed in the housing (1); The surface cleaning assembly (4) includes a pair of horizontal plates (4-1), both of which are horizontally fixed inside the outer shell (1). Each pair of horizontal plates (4-1) is vertically connected to several rotating shafts (4-2) via rotating shafts (4-2), and each rotating shaft (4-2) is provided with a brush disc (4-3) at one end.

2. The plastic sheet drying device according to claim 1, characterized in that, One of the rotating shafts (4-2) on the pair of horizontal plates (4-1) is driven to rotate by electricity. Each rotating shaft (4-2) is provided with a transmission gear (4-4), and the transmission gears (4-4) mesh with each other. A flattening roller (4-5) is horizontally rotatably connected inside the outer shell (1).

3. The plastic sheet drying device according to claim 2, characterized in that, The conveying and drying assembly (5) includes a pair of conveyor belts (5-1), both of which are disposed inside the housing (1). The pair of conveyor belts (5-1) are located on both sides of the cross plate (4-1), and a pair of air hoods (5-2) are fixedly connected inside the housing (1).

4. A plastic sheet drying device according to claim 3, characterized in that, The air hoods (5-2) are located on the top and inside of the conveyor belt (5-1) respectively. Each pair of air hoods (5-2) has several air holes (5-3) on both opposite surfaces. Several heating tubes (5-5) are installed inside the air hoods (5-2). Each side of the air hoods (5-2) is provided with an air inlet pipe (5-4).

5. A plastic sheet drying device according to claim 4, characterized in that, The exhaust assembly (6) includes two pairs of exhaust pipes (6-1), which are respectively located at the upper and lower ends of the outer shell (1). The two pairs of exhaust pipes (6-1) are higher and lower than the conveyor belt (5-1), respectively. Each exhaust pipe (6-1) has several suction holes (6-2) on its surface. A suction pipe (6-3) is provided on the outer side of the outer shell (1), and the suction pipe (6-3) is connected to all the suction pipes (6-3).

6. The plastic sheet drying device according to claim 1, characterized in that, Curtains (7) are installed on both sides of the top cover (3).

7. A plastic sheet drying device according to claim 3, characterized in that, The surface of the conveyor belt (5-1) corresponding to the position of the air hood (5-2) has a mesh-like perforated structure.

8. A plastic sheet drying device according to claim 3, characterized in that, The flattening roller (4-5) is located at the upper end of the drive shaft portion of the conveyor belt (5-1), and the distance between the flattening roller (4-5) and the surface of the conveyor belt (5-1) matches the thickness of the plastic sheet.

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