A low-temperature drying device for plastic particles
By setting rotating rollers and scraper crushing nails in the feed box to pre-crush plastic particles, combined with screw rod pushing and low-temperature hot air injection, the problem of uneven drying caused by plastic particle agglomeration is solved, and the drying efficiency and uniformity are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-07
AI Technical Summary
The moisture inside the clumped plastic granules is difficult to come into full contact with the outside air, resulting in uneven drying and a longer drying time.
By setting rotating rollers and scrapers in the feed box, crushing nails are used to pre-crush agglomerated plastic granules. Combined with screw pushing and low-temperature hot air injection, uniform drying of plastic granules is achieved.
It improves the dispersibility and drying efficiency of plastic granules, shortens the drying time, and ensures the uniformity and effectiveness of drying.
Smart Images
Figure CN224465027U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of low-temperature drying technology for plastic particles, specifically a low-temperature drying device for plastic particles. Background Technology
[0002] Plastic granules are granular plastic materials, typically used as semi-finished raw materials in the production of plastic products. They are produced through processes such as melting, extrusion, and granulation. These granules are easy to store, transport, and process, making them an indispensable raw material in plastic product manufacturing. Plastic granules can be classified into various types, including general-purpose plastics, engineering plastics, thermosetting plastics, and specialty plastics such as functional polymer plastics.
[0003] Chinese utility model patent application number 202420928338.2 provides a low-temperature drying device for plastic particles. The device continuously feeds plastic particles through a rotating drum. The rotating drum is driven to rotate by a toothed ring. Air is blown out of the rotating drum through a fixed nozzle to dry the plastic particles inside the drum. The air is dehumidified by a dehumidifying chamber and dehumidifying blocks to prevent the plastic particles from deforming due to high temperature and improve the yield of plastic particles.
[0004] However, during the use of the aforementioned equipment, it was found that due to the high moisture content of the plastic granules, the large amount of water adsorbed on the surface of the granules acted as an adhesive, causing them to clump together and form clumps. These clumps of plastic granules had difficulty exposing their internal moisture to the outside air, resulting in uneven drying. While the rotating drum could break up some of the clumps, the clumps needed to be mechanically turned and broken up first to expose the internal moisture to air before drying could proceed simultaneously. This process prolonged the evaporation time, thus affecting the drying efficiency. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides a low-temperature drying device for plastic particles, which solves the problem mentioned in the background technology that the internal moisture of agglomerated plastic particles is difficult to fully contact with the outside air, resulting in uneven drying and a long drying time.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature drying device for plastic particles, comprising a drying chamber, one end of which is connected to a feeding box, a rotating roller rotatably mounted inside the feeding box, the rotating roller being connected to the output end of a rotating motor, a scraper fixedly arranged on the periphery of the rotating roller, and paddles equidistantly arranged on the scraper, a perforation being provided at the bottom of the feeding box, and a crushing nail fixedly arranged at the bottom of the feeding box, the crushing nail and the perforation being staggered, with the scraper positioned between two adjacent crushing nails.
[0007] Preferably, a drive motor is installed at the end of the drying box near the feed box, the output end of the drive motor is connected to a screw rod, and the end of the drying box away from the drive motor is connected to a discharge port.
[0008] Preferably, the spiral rod is disposed in the drying chamber, and an arc-shaped support plate is fixedly disposed at the bottom of the drying chamber, and the support plate is provided with ventilation holes.
[0009] Preferably, a push plate is fixedly provided on the screw rod, and the push plate is in contact with the bearing plate.
[0010] Preferably, the bottom of the drying oven is provided with an air inlet pipe, which is located below the support plate. The air inlet pipe is connected to an external air intake device and is equipped with a jet nozzle.
[0011] Preferably, the top of the drying chamber is provided with an air suction chamber, and an air suction pipe is connected to the air suction chamber and connected to an external air suction device.
[0012] This invention provides a low-temperature drying device for plastic particles. It has the following beneficial effects:
[0013] (1) This utility model uses a rotating roller inside the feed box to drive the scraper and the deflector to rotate. During the rotation, the scraper can scrape the clumped plastic particles entering the feed box to the crushing nail area. The particles will be blocked and cut by the crushing nail, forcibly breaking the clumped particles into smaller clumps or individual particles, so that the pre-crushing is completed before entering the drying box, so that the particles have good dispersion when entering the drying stage.
[0014] (2) This utility model drives the screw rod to rotate by driving the motor. The push plate on the screw rod can push the plastic particles in the drying chamber from one end of the feed box to the outlet. During this process, the jet nozzle on the air inlet pipe can spray the low-temperature air provided by the external air inlet equipment into the drying chamber in a directional manner, ensuring that all parts of the particles can fully contact the low-temperature air during the movement process, so as to achieve uniform drying. Attached Figure Description
[0015] Figure 1 This is a diagram showing the overall structure of the present utility model;
[0016] Figure 2 This utility model Figure 1 Internal structure diagram of the drying oven;
[0017] Figure 3 This utility model Figure 2 Structural diagram of the drying chamber;
[0018] Figure 4 This utility model Figure 1 Structural diagram of the feed hopper.
[0019] In the diagram, 1 is the drying chamber; 11 is the drive motor; 12 is the drying cavity; 13 is the screw rod; 131 is the push plate; 14 is the support plate; 141 is the vent; 15 is the air inlet pipe; 151 is the air jet nozzle; and 16 is the discharge port.
[0020] 2. Feed box; 21. Rotating roller; 22. Scraper; 221. Pulley; 23. Crushing nail; 24. Perforation;
[0021] 3. Inhalation chamber; 31. Inhalation tube. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Example 1:
[0024] Please see Figures 1-4 This utility model provides a low-temperature drying device for plastic particles, including a drying box 1, a feeding box 2 connected to one end of the drying box 1, a rotating roller 21 rotatably installed inside the feeding box 2, the rotating roller 21 being connected to the output end of a rotating motor, a scraper 22 fixedly arranged on the periphery of the rotating roller 21, a paddle plate 221 equidistantly arranged on the scraper 22, a perforation 24 opened at the bottom of the feeding box 2, a crushing nail 23 fixedly arranged at the bottom of the feeding box 2, the crushing nail 23 and the perforation 24 being staggered, and the scraper 22 being located between two adjacent crushing nails 23;
[0025] A drive motor 11 is installed at the end of the drying box 1 near the feed box 2. A screw rod 13 is connected to the output end of the drive motor 11. A discharge port 16 is connected to the end of the drying box 1 away from the drive motor 11.
[0026] The screw rod 13 is installed in the drying chamber 12, and an arc-shaped support plate 14 is fixedly installed at the bottom of the drying chamber 12. The support plate 14 has ventilation holes 141.
[0027] A push plate 131 is fixedly installed on the screw rod 13, and the push plate 131 is in contact with the bearing plate 14;
[0028] The bottom of the drying oven 1 is provided with an air inlet pipe 15, which is located below the support plate 14. The air inlet pipe 15 is connected to an external air intake device, and an air jet head 151 is provided on the air inlet pipe 15.
[0029] The top of the drying chamber 12 is provided with an air suction chamber 3, and an air suction pipe 31 is connected to the air suction chamber 3. The air suction pipe 31 is connected to an external air suction device.
[0030] Specifically, plastic particles enter the box through the top of the feed box 2. The rotating motor drives the rotating roller 21 to rotate, which in turn drives the scraper 22 and the deflector 221 to rotate synchronously. During the rotation of the scraper 22, due to the staggered distribution of the crushing nails 23 and the perforations 24, and the scraper 22 being positioned between adjacent crushing nails 23, the particles are blocked and cut by the crushing nails 23 under the action of the scraper 22. The agglomerated plastic particles are forcibly broken into smaller granular clusters or individual particles, which then fall into the drying chamber 12 of the drying box 1 through the perforations 24. Pre-crushing allows the particles to have good dispersion when entering the drying chamber 12, increases the contact area with hot air, accelerates the evaporation rate of moisture, and significantly improves the drying efficiency.
[0031] An external air intake device supplies low-temperature hot air into the drying chamber 1 through an air intake pipe 15. The jet nozzle 151 on the air intake pipe 15 directs the hot air towards the area below the arc-shaped support plate 14. The hot air passes through the vent holes 141 on the support plate 14 and evenly penetrates the plastic particle layer on the surface of the support plate 14, making full contact with the plastic particles and removing moisture from the particle surface.
[0032] The motor 11 is started, which drives the screw 13 to rotate. The screw 13 pushes the plastic particles along the arc-shaped support plate 14 from one end near the feed box 2 towards the discharge port 16. During the movement, the push plate 131 agitates the particles, enabling them to fully and continuously contact the low-temperature hot air passing through the vent 141. The hot air continuously removes moisture from the surface and interior of the particles, completing the low-temperature drying process.
[0033] As the surface moisture of the plastic particles continues to evaporate, the moisture generated in the drying chamber 12 rises to the top suction chamber 3. An external suction device extracts the moisture from the suction chamber 3 through the suction pipe 31, keeping the air inside the drying chamber 12 dry and creating a good environment for the continuous drying of the particles, thus preventing moisture accumulation from affecting the drying effect.
[0034] Working principle: The plastic particles to be dried are fed into the top of the feed box 2, and the rotating motor is started, which drives the rotating roller 21 to start rotating. The scraper 22 and the deflector 221 on the rotating roller 21 rotate accordingly. Since the crushing nails 23 and the perforations 24 are arranged alternately, and the scraper 22 is located between adjacent crushing nails 23, the agglomerated plastic particles are blocked and cut into smaller particles by the crushing nails 23 under the push of the scraper 22. Then, they fall into the drying chamber 12 of the drying box 1 through the perforations 24, completing the pre-crushing step.
[0035] The drive motor 11 is activated, which drives the screw rod 13 to rotate. The pusher plate 131 on the screw rod 13 pushes the plastic particles along the arc-shaped support plate 14, moving from the end near the feed box 2 towards the discharge port 16. During the movement, the external air intake device is activated, and low-temperature hot air is delivered to the drying chamber 1 through the air intake pipe 15. The jet nozzle 151 on the air intake pipe 15 directs the hot air downwards towards the arc-shaped support plate 14. The hot air penetrates evenly through the air vents 141 on the support plate 14, permeating the plastic particle layer on the surface of the support plate 14. The hot air makes full contact with the particles, while the pusher plate 131 continuously moves the particles, causing them to constantly change position and fully and continuously contact the low-temperature hot air passing through the air vents 141. The hot air continuously removes moisture from the surface and interior of the particles, completing the deep drying process.
[0036] As drying proceeds, the moisture evaporated from the surface of the plastic particles forms humid air that rises to the suction chamber 3 at the top of the drying chamber 12. The external suction equipment is then activated, and the humid air in the suction chamber 3 is extracted through the suction pipe 31 to maintain the dryness of the air in the drying chamber 12, ensuring a stable drying environment and preventing humid air from affecting the drying effect. After completing the drying process, the plastic particles are pushed by the pusher plate 131 and finally discharged from the discharge port 16 at the end of the drying chamber 1 away from the feed box 2, and enter the subsequent production stage.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A low-temperature drying device for plastic particles, comprising a drying chamber (1), characterized in that: One end of the drying box (1) is connected to the feeding box (2). A rotating roller (21) is rotatably installed inside the feeding box (2). The rotating roller (21) is connected to the output end of the rotating motor. A scraper (22) is fixedly arranged on the periphery of the rotating roller (21). A paddle plate (221) is equidistantly arranged on the scraper (22). A perforation (24) is opened at the bottom of the feeding box (2). A crushing nail (23) is fixedly arranged at the bottom of the feeding box (2). The crushing nail (23) and the perforation (24) are staggered. The scraper (22) is located between two adjacent crushing nails (23).
2. The low-temperature drying device for plastic particles according to claim 1, characterized in that: A drive motor (11) is installed at one end of the drying box (1) near the feed box (2). The output end of the drive motor (11) is connected to a screw rod (13). The end of the drying box (1) away from the drive motor (11) is connected to a discharge port (16).
3. The low-temperature drying device for plastic particles according to claim 2, characterized in that: The spiral rod (13) is installed in the drying chamber (12), and an arc-shaped support plate (14) is fixedly installed at the bottom of the drying chamber (12). The support plate (14) has ventilation holes (141).
4. The low-temperature drying device for plastic particles according to claim 3, characterized in that: A push plate (131) is fixedly installed on the screw rod (13), and the push plate (131) is in contact with the bearing plate (14).
5. The low-temperature drying device for plastic particles according to claim 4, characterized in that: The bottom of the drying box (1) is provided with an air inlet pipe (15), which is located below the support plate (14). The air inlet pipe (15) is connected to an external air intake device, and a jet nozzle (151) is provided on the air inlet pipe (15).
6. The low-temperature drying device for plastic particles according to claim 5, characterized in that: The top of the drying chamber (12) is provided with an air suction chamber (3), and an air suction pipe (31) is connected to the air suction chamber (3). The air suction pipe (31) is connected to an external air suction device.