Drying device for plastic film production

Abstract

The utility model discloses a drying device for plastic film production, which comprises a drying box, the bottom of the drying box is fixedly connected with a conical hopper, the top of the drying box is provided with a feed port, one side of the drying box is fixedly provided with a plurality of air inlet pipes, the outer surface of the drying box is provided with a hot air assembly, and the hot air assembly is communicated with the plurality of air inlet pipes. The side wall of the side, right facing the air inlet pipe, of the drying box is rotationally connected with a side door through a hinge. According to the drying device, the drying box, the air inlet pipe, the hot air assembly, the backing material pipe, the conveying pipe, the conveying assembly and the discharging pipe are arranged, raw materials are added into the conical hopper at the bottom of the drying box, the raw materials are pumped out of the conical hopper through circulation of the conveying assembly and then discharged into the drying box from the top of the drying box, and in the circulating and continuous falling process of the raw materials in the drying box, the raw materials are dried; and hot air is blown into the drying box through the air inlet pipe and the hot air assembly, so that the raw materials are dried continuously, and the drying mode can avoid the problem of low drying efficiency caused by raw material accumulation.

Description

Technical Field

[0001] This utility model relates to the field of plastic film processing technology, and in particular to a drying device for plastic film production. Background Technology

[0002] As is well known, plastic film is a thin film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It is mainly used for packaging and as a coating layer. However, plastic films made of special plastic materials need to be preheated before preparation in order to meet the requirements of use.

[0003] A search revealed that patent CN221417094U discloses a drying device for plastic film production. This device uses a chamber with multiple stirring rods inside to agitate the raw materials during the drying process, thereby improving drying efficiency. However, this device has the following drawbacks: the water vapor generated during drying is difficult to escape from the chamber, and if there is too much raw material inside, the accumulation of material will affect drying efficiency; furthermore, the internal structure of the chamber is too complex, and if any material melts inside, it becomes very difficult to clean. Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a drying device for plastic film production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drying device for plastic film production, comprising a drying chamber, a conical hopper fixedly connected to the bottom of the drying chamber, and a feed inlet opened at the top of the drying chamber. Multiple air inlet pipes are fixed to one side of the drying chamber. A hot air assembly is installed on the outer surface of the drying chamber and is connected to the multiple air inlet pipes. A side door is rotatably connected to the side wall of the drying chamber facing the air inlet pipes via a hinge, and the middle of the side door has a hollow design. An inclined bottom material pipe is fixedly connected to the bottom of the conical hopper, and a vertical conveying pipe is fixed to the other end of the bottom material pipe. A conveying assembly is installed inside the conveying pipe, and a top pipe is rotatably connected to the top of the conveying pipe via a bearing. An inclined discharge pipe is fixed to the side wall of the top pipe, and a rotary drive assembly for driving the top pipe to rotate is installed at the top of the conveying pipe.

[0006] Furthermore, the hot air assembly includes a fan fixed to the outer wall of the drying chamber, an exhaust pipe fixedly connected to the air outlet of the fan, a heating pipe fixed in the middle of the exhaust pipe, an electric heating wire installed inside the heating pipe, and the other end of the exhaust pipe connected to multiple air inlet pipes.

[0007] Furthermore, a cylinder is fixedly connected to the air inlet of the fan, and a filter screen is installed inside the cylinder.

[0008] Furthermore, the conveying assembly includes an auger located inside the conveying pipe and a first motor fixed to the lower surface of the conveying pipe, wherein the output shaft of the first motor passes through the bottom wall of the conveying pipe and is fixedly connected to the auger.

[0009] Furthermore, a mesh screen is fixedly connected to the middle of the side door.

[0010] Furthermore, the rotary drive assembly includes a second motor fixed to the top of the conveying pipe, and the output shaft of the second motor is fixedly connected to a drive gear. A driven gear is fixed to the outer wall of the top pipe, and the drive gear and the driven gear mesh.

[0011] The beneficial effects of this utility model are:

[0012] 1. In use, this utility model is a drying device for plastic film production, which includes a drying box, an air inlet pipe, a hot air assembly, a bottom material pipe, a conveying pipe, a conveying assembly, and a discharge pipe. The raw material is added to the cone at the bottom of the drying box. The conveying assembly circulates and extracts the raw material from the cone, and then discharges it into the drying box from the top. As the raw material circulates and falls continuously inside the drying box, hot air is blown into the drying box through the air inlet pipe and the hot air assembly, thereby continuously drying the raw material. This drying method can avoid the problem of low drying efficiency caused by raw material accumulation. In addition, there are no mechanical structures inside the drying box and cone, making cleaning more convenient.

[0013] 2. When in use, this utility model is a drying device for plastic film production, which is equipped with a rotary drive component. The rotary drive component drives the top pipe and the discharge pipe at the top of the conveying pipe to rotate. When the discharge pipe moves away from the drying box, the raw material can be discharged. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments 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 : Overall perspective view of this utility model;

[0016] Figure 2 : Overall sectional view of this utility model;

[0017] Figure 3 The present utility model Figure 2 Enlarged view of point A in the middle.

[0018] The attached figures are labeled as follows:

[0019] 1. Drying oven; 101. Feed inlet; 2. Conical hopper; 3. Air inlet pipe; 4. Hot air assembly; 41. Fan; 42. Exhaust pipe; 43. Heating tube; 44. Cylinder; 45. Filter screen; 5. Side door; 51. Partition screen; 6. Bottom material pipe; 7. Conveying pipe; 8. Conveying assembly; 81. First motor; 82. Screwdriver; 9. Top pipe; 10. Discharge pipe; 11. Rotary drive assembly; 111. Second motor; 112. Drive gear; 113. Driven gear. Detailed Implementation

[0020] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-3 As shown, a drying device for plastic film production is disclosed, including a drying chamber 1. A conical hopper 2 is fixedly connected to the bottom of the drying chamber 1, and a feed inlet 101 is opened on the top of the drying chamber 1. Multiple air inlet pipes 3 are fixed on one side of the drying chamber 1. A hot air assembly 4 is installed on the outer surface of the drying chamber 1 and is connected to the multiple air inlet pipes 3. A side door 5 is rotatably connected to the side wall of the drying chamber 1 facing the air inlet pipes 3 by a hinge, and the middle of the side door 5 is hollowed out. An inclined bottom material pipe 6 is fixedly connected to the bottom end of the conical hopper 2, and a vertical conveying pipe 7 is fixed to the other end of the bottom material pipe 6. A conveying assembly 8 is installed inside the conveying pipe 7. A top pipe 9 is rotatably connected to the top end of the conveying pipe 7 by a bearing. An inclined discharge pipe 10 is fixed to the side wall of the top pipe 9, and a rotary drive assembly 11 for driving the top pipe 9 to rotate is installed at the top end of the conveying pipe 7.

[0022] The hot air assembly 4 includes a fan 41 fixed to the outer wall of the drying chamber 1. The air outlet of the fan 41 is fixedly connected to an exhaust pipe 42, and a heating pipe 43 is fixed in the middle of the exhaust pipe 42. An electric heating wire is installed inside the heating pipe 43. The other end of the exhaust pipe 42 is connected to multiple air inlet pipes 3.

[0023] After the fan 41 is started, air will enter the drying chamber 1 through the exhaust pipe 42 and the air inlet pipe 3. During this process, the air will be heated by the electric heating wire. The hot air dries the plastic raw material inside the drying chamber 1. The air entering the drying chamber 1 will then be blown out from the hollow groove in the middle of the side door 5.

[0024] A cylinder 44 is fixedly connected to the air inlet of the fan 41, and a filter 45 is installed inside the cylinder 44. By setting the filter 45, external dust can be prevented from entering the drying chamber 1.

[0025] The conveying assembly 8 includes an auger 82 located inside the conveying pipe 7 and a first motor 81 fixed to the lower surface of the conveying pipe 7. The output shaft of the first motor 81 passes through the bottom wall of the conveying pipe 7 and is fixedly connected to the auger 82.

[0026] When there is raw material inside the cone hopper 2, the raw material will enter the bottom of the conveying pipe 7 along the bottom material pipe 6. At this time, the first motor 81 is started to drive the auger 82 to rotate. The auger 82 will push the raw material to move upward along the conveying pipe 7. Then the raw material enters the top pipe 9 and is finally discharged from the discharge pipe 10.

[0027] A partition net 51 is fixedly connected to the middle of the side door 5. The partition net 51 can prevent raw materials from being discharged from the hollow part in the middle of the side door 5.

[0028] The rotary drive assembly 11 includes a second motor 111 fixed to the top of the conveying pipe 7, and the output shaft of the second motor 111 is fixedly connected to a drive gear 112. A driven gear 113 is fixed to the outer wall of the top pipe 9, and the drive gear 112 and the driven gear 113 mesh.

[0029] The second motor 111 can drive the top pipe 9 to rotate, so that the discharge pipe 10 can rotate above the feed inlet 101, or the discharge pipe 10 can rotate to the side away from the drying box 1.

[0030] Working principle: First, raw materials are added into the drying chamber 1 through the feed inlet 101. The raw materials fall into the conical hopper 2. Then, the blower 41, the electric heating wire in the heating tube 43, and the first motor 81 are started. The first motor 81 drives the auger 82 to rotate, and the blower 41 blows heated air into the drying chamber 1. The raw materials enter the bottom of the conveying pipe 7 along the bottom material pipe 6 and are then conveyed upward by the auger 82. Finally, they are discharged along the discharge pipe 10. The raw materials re-enter the drying chamber 1 through the feed inlet 101 and are dried by hot air as they fall inside the drying chamber 1. In this cyclical falling drying process, the raw materials are rapidly heated and dried. After drying, the first motor 81 is stopped first, and then the second motor 111 is started to drive the top pipe 9 to rotate 180°, so that the discharge pipe 10 is away from the drying chamber 1. Then, the first motor 81 is started again, so that the raw materials are discharged from the discharge pipe 10. At this time, the raw materials discharged from the discharge pipe 10 can be collected.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A drying apparatus for plastic film production, comprising a drying chamber (1), characterized in that: The bottom of the drying box (1) is fixedly connected to a cone hopper (2), and the top of the drying box (1) is provided with a feed inlet (101). Multiple air inlet pipes (3) are fixed on one side of the drying box (1). A hot air assembly (4) is installed on the outer surface of the drying box (1), and the hot air assembly (4) is connected to multiple air inlet pipes (3). A side door (5) is rotatably connected to the side wall of the drying box (1) facing the air inlet pipe (3) by a hinge. The middle part of the side door (5) is hollowed out. An inclined bottom material pipe (6) is fixedly connected to the bottom end of the cone hopper (2). A vertical conveying pipe (7) is fixed to the other end of the bottom material pipe (6). A conveying assembly (8) is installed inside the conveying pipe (7). A top pipe (9) is rotatably connected to the top end of the conveying pipe (7) by a bearing. An inclined discharge pipe (10) is fixed to the side wall of the top pipe (9). A rotary drive assembly (11) for driving the top pipe (9) to rotate is installed at the top end of the conveying pipe (7).

2. The drying apparatus for plastic film production according to claim 1, characterized in that: The hot air assembly (4) includes a fan (41) fixed to the outer wall of the drying box (1). The air outlet of the fan (41) is fixedly connected to an exhaust pipe (42), and a heating pipe (43) is fixed in the middle of the exhaust pipe (42). An electric heating wire is installed inside the heating pipe (43). The other end of the exhaust pipe (42) is connected to multiple air inlet pipes (3).

3. A drying apparatus for plastic film production according to claim 2, characterized in that: The air inlet of the fan (41) is fixedly connected to a cylinder (44), and a filter screen (45) is installed inside the cylinder (44).

4. The drying apparatus for plastic film production according to claim 1, characterized in that: The conveying assembly (8) includes an auger (82) located inside the conveying pipe (7) and a first motor (81) fixed to the lower surface of the conveying pipe (7). The output shaft of the first motor (81) passes through the bottom wall of the conveying pipe (7) and is fixedly connected to the auger (82).

5. A drying apparatus for plastic film production according to claim 1, characterized in that: A mesh (51) is fixedly connected to the middle of the side door (5).

6. A drying apparatus for plastic film production according to claim 1, characterized in that: The rotary drive assembly (11) includes a second motor (111) fixed to the top of the conveying pipe (7), and the output shaft of the second motor (111) is fixedly connected to a drive gear (112). A driven gear (113) is fixed to the outer wall of the top pipe (9), and the drive gear (112) and the driven gear (113) mesh.

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