Two-side drying equipment for producing degradable plastic film

Abstract

The utility model relates to the technical field of film production, in particular to two-side drying equipment for producing degradable plastic films, which mainly comprises a drying box, soaking rollers, an air inlet stopper, an air outlet stopper, an air slip ring, an air guide branch pipe, a hot air system, a rotary driver, a rotary base frame and a heating pipe. The rotary driver is used for driving the soaking rollers to rotate, the two soaking rollers are used for evenly transferring heat dissipated by the heating pipe to the two faces of a thin film strip, even heating is achieved, and the situation that a thin film is damaged due to local overheating is avoided; hot air generated by the hot air system is guided into the cylindrical exhaust groove of the soaking roller through the air guide branch pipe, the air sliding ring and the air inlet blocking piece and then guided out through the air outlet blocking piece, negative pressure can be generated when heating air in the cylindrical exhaust groove flows at a high speed, water on the surface of a film can be rapidly sucked away through the water suction groove in the drying process, and the drying efficiency is guaranteed.

Description

Technical Field

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

[0002] Double-sided drying equipment plays a crucial role in the production of biodegradable plastic films. Here are some of the main functions of double-sided drying equipment in this field: 1) During the production of biodegradable plastic films, raw materials may absorb moisture from the air. If this moisture is not removed, it will cause a series of quality problems in subsequent processing. Double-sided drying equipment, through heating and ventilation systems, can quickly remove moisture from the raw materials of the plastic film, preventing defects such as bubbles and cracks during processing, thereby ensuring the quality and strength of the product. 2) The use of double-sided drying equipment can significantly shorten the drying time of plastic films, thereby improving production efficiency. Especially in large-scale production, the automated and intelligent control system of double-sided drying equipment can achieve functions such as one-button start, intelligent monitoring, and fault alarms, greatly reducing the difficulty and cost of manual operation, making the entire production process more efficient and stable. 3) Double-sided drying equipment not only removes moisture but can also optimize the performance of biodegradable plastic films by controlling parameters such as drying temperature and humidity. For example, appropriate drying treatment can enhance key performance indicators such as tensile strength, tear strength, and transparency of the film, making it more suitable for various application scenarios.

[0003] Existing double-sided drying equipment for biodegradable plastic film production has shortcomings in use. First, its heat uniformity during drying is poor, easily leading to film damage due to localized overheating. Second, it cannot quickly remove moisture from the film during the drying process, affecting drying efficiency. Therefore, it is necessary to optimize and improve existing double-sided drying equipment for biodegradable plastic film production. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned problems in the traditional technology and provide a two-sided drying device for the production of biodegradable plastic film.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A double-sided drying device for the production of biodegradable plastic film includes a drying box, a heat-spreading roller, an air inlet baffle, an air outlet baffle, an air slip ring, an air guide branch pipe, a hot air system, a rotary drive, a rotary base frame, and a heating tube.

[0007] The drying oven is equipped with two parallel heat-spreading rollers. Each heat-spreading roller includes an annular cylinder. The annular cylinder is evenly provided with multiple cylindrical exhaust grooves along its circumference. A water absorption groove is provided between the cylindrical exhaust grooves and the outer surface of the annular cylinder.

[0008] An air inlet baffle and an air outlet baffle are fixedly installed on both sides of the heat-spreading roller. The air inlet baffle is provided with an air inlet pipe that penetrates the drying box and is connected to the air supply end of the hot air system via an air slip ring and an air guide branch pipe. The air outlet baffle is provided with an air outlet pipe that penetrates the drying box. Each of the air inlet baffle and the air outlet baffle has multiple air passages inside that communicate with the cylindrical exhaust groove. A heating tube is installed between the air inlet baffle and the air outlet baffle.

[0009] The outer fixed ring of the rotary drive is fixed to the drying box via the rotary base frame, and the inner movable ring of the rotary drive is fixed to the outer side of the air outlet baffle.

[0010] Furthermore, in the aforementioned double-sided drying equipment for the production of biodegradable plastic film, the annular cylinder of the heat-equalizing roller is made of thermally conductive metal or ceramic material.

[0011] Furthermore, in the above-mentioned double-sided drying equipment for the production of biodegradable plastic film, the diameter of the cylindrical exhaust trough is 1 to 2 cm, and the width of the water absorption trough is 1 / 6 to 1 / 3 of the diameter of the cylindrical exhaust trough.

[0012] Furthermore, in the aforementioned double-sided drying equipment for the production of biodegradable plastic film, the air intake baffle includes a first type of wheel rim portion, a first type of wheel hub portion, a first type of wheel spoke portion, and an air intake pipe. A plurality of first type of wheel spoke portions are installed between the first type of wheel rim portion and the first type of wheel hub portion. An air intake pipe is installed on the outer side of the first type of wheel hub portion. A first axial groove corresponding to and communicating with each cylindrical exhaust groove is opened on the inner side of the first type of wheel rim portion. A first radial groove is opened in the first type of wheel spoke portion. The air intake pipe is connected to the corresponding cylindrical exhaust groove through the first radial groove and the first axial groove.

[0013] Furthermore, in the aforementioned double-sided drying equipment for biodegradable plastic film production, the air outlet baffle includes a second type of wheel rim portion, a second type of wheel hub portion, a second type of wheel spoke portion, and an air outlet pipe. Several second type of wheel spoke portions are installed between the second type of wheel rim portion and the second type of wheel hub portion. An air outlet pipe is installed on the outer side of the second type of wheel hub portion. A second axial groove corresponding to and communicating with each cylindrical exhaust groove is opened on the inner side of the second type of wheel rim portion. A second radial groove is opened in the second type of wheel spoke portion. The air outlet pipe is connected to the corresponding cylindrical exhaust groove through the second radial groove and the second axial groove.

[0014] Furthermore, in the aforementioned double-sided drying equipment for producing biodegradable plastic film, the heating tube is installed between the first type of hub and the second type of hub.

[0015] Furthermore, in the above-mentioned double-sided drying equipment for the production of biodegradable plastic film, the outer diameter of the first type of wheel rim and the second type of wheel hub is greater than the outer diameter of the heat-spreading roller, and the axial length of the heat-spreading roller is equal to the width of the film strip to be dried.

[0016] Furthermore, in the above-mentioned double-sided drying equipment for the production of biodegradable plastic film, the upper part of the front side plate of the drying box is provided with a film inlet hole to facilitate the introduction of film material, the lower part of the rear side plate of the drying box is provided with a film outlet hole to facilitate the discharge of film material, and the left and right side plates of the drying box are provided with perforations to facilitate the passage of air inlet pipe and air outlet pipe.

[0017] The beneficial effects of this utility model are:

[0018] This utility model has a reasonable structural design, mainly consisting of a drying chamber, a heat-spreading roller, an air inlet baffle, an air outlet baffle, an air slip ring, an air guide branch pipe, a hot air system, a rotary driver, a rotary base frame, and heating tubes. These components work together in a coordinated manner. On one hand, the rotary driver drives the heat-spreading roller to rotate, and the two heat-spreading rollers evenly transfer the heat dissipated by the heating tubes to both sides of the film material, achieving uniform heating and preventing localized overheating that could damage the film. On the other hand, the hot air generated by the hot air system is guided through the air guide branch pipe, air slip ring, and air inlet baffle into the cylindrical exhaust groove of the heat-spreading roller, and then discharged outwards through the air outlet baffle. The high-speed flow of heated gas in the cylindrical exhaust groove generates negative pressure, which, combined with the water absorption groove, allows for rapid removal of moisture from the film surface during the drying process, ensuring drying efficiency.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the present invention, omitting the latter angle of the drying box;

[0023] Figure 3 This is a schematic diagram of the structure of this utility model from another angle after omitting the drying box;

[0024] Figure 4This is a side view of the structure of this utility model with the drying box omitted.

[0025] Figure 5 This is a schematic diagram of the heat-spreading roller in this utility model;

[0026] Figure 6 This is a partially enlarged schematic diagram of the heat-spreading roller in this utility model;

[0027] Figure 7 This is a structural schematic diagram of the air intake baffle and the air outlet baffle in this utility model;

[0028] Figure 8 This is a schematic diagram of the rotary drive in this utility model;

[0029] In the attached diagram, the components represented by each number are as follows:

[0030] 1-Drying box, 2-Heating roller, 3-Air inlet baffle, 301-Type 1 wheel rim, 302-Type 1 wheel hub, 303-Type 1 wheel spoke, 304-Air inlet pipe, 4-Air outlet baffle, 401-Type 2 wheel rim, 402-Type 2 wheel hub, 403-Type 2 wheel spoke, 404-Air outlet pipe, 5-Air slip ring, 6-Air guide branch pipe, 601-Mounting ring, 602-Axial push rod, 603-Guide rod, 604-Support rod, 605-Grinding ring, 7-Hot air system, 8-Rotary drive, 9-Rotary base frame, 10-Film inlet hole, 11-Film outlet hole, 12-Film tape, 13-Heating tube. Detailed Implementation

[0031] 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.

[0032] like Figures 1-8 As shown, this embodiment provides a two-sided drying device for the production of biodegradable plastic film, including a drying box 1, a heat equalization roller 2, an air inlet baffle 3, an air outlet baffle 4, an air slip ring 5, an air guide branch pipe 6, a hot air system 7, a rotary drive 8, a rotary base frame 9, and a heating tube 13.

[0033] In this embodiment, two parallel heat-spreading rollers 2 are installed inside the drying oven 1. Each heat-spreading roller 2 includes an annular cylinder 201, with multiple cylindrical exhaust grooves 202 evenly distributed circumferentially along its surface. A water-absorbing groove 203 is provided between the cylindrical exhaust grooves 202 and the outer surface of the annular cylinder 201. The annular cylinder 201 in the heat-spreading roller 2 is made of thermally conductive metal or ceramic material. The diameter of the cylindrical exhaust grooves 202 is 1–2 cm, and the width of the water-absorbing groove 203 is 1 / 6 to 1 / 3 of the diameter of the cylindrical exhaust grooves 202.

[0034] In this embodiment, an air inlet baffle 3 and an air outlet baffle 4 are fixedly installed on both sides of the heat-spreading roller 2. The air inlet baffle 3 is provided with an air inlet pipe 304 that penetrates the drying chamber 1, and the air inlet pipe 304 is connected to the air supply end of the hot air system 7 via an air slip ring 5 and an air guide branch pipe 6. The air outlet baffle 4 is provided with an air outlet pipe 404 that penetrates the drying chamber 1. The air inlet baffle 3 and the air outlet baffle 4 are each provided with multiple air passages that communicate with the cylindrical exhaust groove. A heating pipe 13 is installed between the air inlet baffle 3 and the air outlet baffle 4.

[0035] In this embodiment, the outer fixed ring of the rotary drive 8 is fixed to the drying box 1 via the rotary base frame 9, and the inner movable ring of the rotary drive 8 is fixed to the outer side of the air outlet baffle 4.

[0036] In this embodiment, the air intake baffle 3 includes a first type of wheel rim portion 301, a first type of wheel hub portion 302, a first type of wheel spoke portion 303, and an air intake pipe 304. A plurality of first type of wheel spoke portions 303 are installed between the first type of wheel rim portion 301 and the first type of wheel hub portion 302. The air intake pipe 304 is installed on the outer side of the first type of wheel hub portion 301. A first axial groove corresponding to and communicating with each cylindrical exhaust groove 202 is opened on the inner side of the first type of wheel rim portion 301. A first radial groove extending to the first type of wheel hub portion 302 is opened in the first type of wheel spoke portion. The air intake pipe communicates with the corresponding cylindrical exhaust groove 202 via the first radial groove and the first axial groove.

[0037] In this embodiment, the air outlet baffle 4 includes a second type of wheel rim portion 401, a second type of wheel hub portion 402, a second type of wheel spoke portion 403, and an air outlet pipe 404. A plurality of second type of wheel spoke portions 403 are installed between the second type of wheel rim portion 401 and the second type of wheel hub portion 402. An air outlet pipe 404 is installed on the outer side of the second type of wheel hub portion 402. A second axial groove corresponding to and communicating with each cylindrical exhaust groove 202 is opened on the inner side of the second type of wheel rim portion 401. A second radial groove extending to the second type of wheel hub portion 402 is opened in the second type of wheel spoke portion 403. The air outlet pipe 404 communicates with the corresponding cylindrical exhaust groove 202 through the second radial groove and the second axial groove.

[0038] In this embodiment, the heating element 13 is installed between the first type of hub portion 302 and the second type of hub portion 402. There are two layout options for the heating element 13; the first option is as follows... Figure 7 As shown, multiple heating tubes 13 are arranged in a circular array around the central axis of the first type of hub portion 302 and the second type of hub portion 402. To prevent the first type of hub portion 302 and the second type of hub portion 402 from pulling on the heating tubes 13, connecting rods can be added along the central axis of the first type of hub portion 302 and the second type of hub portion 402. In the second embodiment, a single heating tube 13 is provided, and the heating tube 13 is arranged along the central axis of the first type of hub portion 302 and the second type of hub portion 402. To prevent the first type of hub portion 302 and the second type of hub portion 402 from pulling on the heating tube 13, multiple connecting rods can be added between the first type of hub portion 302 and the second type of hub portion 402 around the heating tube 13.

[0039] In this embodiment, the outer diameters of the first type of wheel rim portion 302 and the second type of wheel hub portion 402 are greater than the outer diameter of the heat-spreading roller 2, and the axial length of the heat-spreading roller 2 is equal to the width of the film strip 12 to be dried. This prevents the film strip 12 from shifting during the conveying process.

[0040] In this embodiment, the upper part of the front side plate of the drying box 1 is provided with a film inlet hole 10 to facilitate the introduction of the film strip 12, the lower part of the rear side plate of the drying box 1 is provided with a film outlet hole 11 to facilitate the discharge of the film strip 12, and the left and right side plates of the drying box 1 are provided with perforations to facilitate the passage of the air inlet pipe 304 and the air outlet pipe 404.

[0041] A specific application of this embodiment is as follows: This drying equipment mainly consists of a drying chamber 1, a heat-spreading roller 2, an air inlet baffle 3, an air outlet baffle 4, an air slip ring 5, an air guide branch pipe 6, a hot air system 7, a rotary driver 8, a rotary base frame 9, and a heating tube 13. The components work together to achieve uniform heating. On the one hand, the rotary driver 8 drives the heat-spreading roller 2 to rotate, and the two heat-spreading rollers 2 evenly transfer the heat dissipated by the heating tube 13 to both sides of the film material, thus avoiding local overheating and film damage. On the other hand, the hot air generated by the hot air system 7 is introduced into the cylindrical exhaust groove 202 of the heat-spreading roller 2 through the air guide branch pipe 6, the air slip ring 5, and the air inlet baffle 3, and then discharged outward through the air outlet baffle 4. When the heated gas flows at high speed in the cylindrical exhaust groove 202, it generates negative pressure. The water absorption groove 203 can quickly remove moisture from the surface of the film during the drying process, ensuring drying efficiency.

[0042] 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 specific implementation methods. 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 two-sided drying apparatus for producing degradable plastic film, characterized by, It includes a drying oven, a heat-spreading roller, an air inlet baffle, an air outlet baffle, an air slip ring, an air guide branch pipe, a hot air system, a rotary drive, a rotary base frame, and heating tubes; The drying oven is equipped with two parallel heat-spreading rollers. Each heat-spreading roller includes an annular cylinder. The annular cylinder is evenly provided with multiple cylindrical exhaust grooves along its circumference. A water absorption groove is provided between the cylindrical exhaust grooves and the outer surface of the annular cylinder. An air inlet baffle and an air outlet baffle are fixedly installed on both sides of the heat-spreading roller. The air inlet baffle is provided with an air inlet pipe that penetrates the drying box and is connected to the air supply end of the hot air system via an air slip ring and an air guide branch pipe. The air outlet baffle is provided with an air outlet pipe that penetrates the drying box. Each of the air inlet baffle and the air outlet baffle has multiple air passages inside that communicate with the cylindrical exhaust groove. A heating tube is installed between the air inlet baffle and the air outlet baffle. The outer fixed ring of the rotary drive is fixed to the drying box via the rotary base frame, and the inner movable ring of the rotary drive is fixed to the outer side of the air outlet baffle.

2. The double-sided drying equipment for producing biodegradable plastic film according to claim 1, characterized in that, The annular cylinder in the heat-spreading roller is made of thermally conductive metal or ceramic material.

3. The double-sided drying equipment for producing biodegradable plastic film according to claim 1, characterized in that, The diameter of the cylindrical exhaust channel is 1 to 2 cm, and the width of the water absorption channel is 1 / 6 to 1 / 3 of the diameter of the cylindrical exhaust channel.

4. The double-sided drying equipment for producing biodegradable plastic film according to claim 1, characterized in that, The air intake baffle includes a first type of wheel rim portion, a first type of wheel hub portion, a first type of wheel spoke portion, and an air intake pipe. A plurality of first type of wheel spoke portions are installed between the first type of wheel rim portion and the first type of wheel hub portion. An air intake pipe is installed on the outer side of the first type of wheel hub portion. A first axial groove corresponding to and communicating with each cylindrical exhaust groove is opened on the inner side of the first type of wheel rim portion. A first radial groove is opened in the first type of wheel spoke portion. The air intake pipe is connected to the corresponding cylindrical exhaust groove through the first radial groove and the first axial groove.

5. The double-sided drying equipment for producing biodegradable plastic film according to claim 4, characterized in that, The air outlet baffle includes a second type of wheel rim portion, a second type of wheel hub portion, a second type of wheel spoke portion, and an air outlet pipe. Several second type of wheel spoke portions are installed between the second type of wheel rim portion and the second type of wheel hub portion. An air outlet pipe is installed on the outer side of the second type of wheel hub portion. A second axial groove corresponding to and communicating with each cylindrical exhaust groove is opened on the inner side of the second type of wheel rim portion. A second radial groove is opened in the second type of wheel spoke portion. The air outlet pipe is connected to the corresponding cylindrical exhaust groove through the second radial groove and the second axial groove.

6. The double-sided drying equipment for producing biodegradable plastic film according to claim 5, characterized in that, The heating element is installed between the first type of wheel hub and the second type of wheel hub.

7. The double-sided drying equipment for producing biodegradable plastic film according to claim 5, characterized in that, The outer diameter of the first type of wheel rim and the second type of wheel hub is greater than the outer diameter of the heat-spreading roller, and the axial length of the heat-spreading roller is equal to the width of the film strip to be dried.

8. The double-sided drying equipment for producing biodegradable plastic film according to claim 5, characterized in that, The front side panel of the drying chamber has an inlet hole for easy feeding of film material, the rear side panel of the drying chamber has an outlet hole for easy feeding of film material, and the left and right side panels of the drying chamber have through holes for easy passage of air inlet and air outlet pipes.

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