ABS plastic particle preheating device
By combining a conical box with airflow disturbance and cyclone dust removal design, the problems of uneven heat conduction and material wear in the ABS plastic granule preheating device are solved, achieving a highly efficient and environmentally friendly preheating effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI JINXIN NEW MATERIALS CO LTD
- Filing Date
- 2025-06-28
- Publication Date
- 2026-05-01
AI Technical Summary
Existing ABS plastic granule preheating devices are inadequate in terms of heat transfer efficiency and uniformity, resulting in temperature gradients and material wear within the granule layer. They cannot achieve uniform preheating and pose environmental pollution risks.
The conical box design separates the preheating chamber from the collection chamber, and gas-solid separation is achieved through airflow disturbance and cyclone dust removal components. Combined with transparent window monitoring, it ensures uniform preheating of materials and recycling of thermal energy.
This method achieves uniform preheating of ABS plastic granules, improves thermal energy utilization efficiency, reduces material damage and environmental pollution, and ensures stable system operation and efficient processing.
Smart Images
Figure CN224183451U_ABST
Abstract
Description
A preheating device for ABS plastic granules Technical Field
[0001] This utility model relates to a pellet preheating device, and more particularly to an ABS plastic pellet preheating device. Background Technology
[0002] ABS plastic granules typically require preheating before injection molding to remove moisture and improve material flowability. Existing preheating devices often employ methods such as hot air circulation heating, electric heating plate contact conduction, or spiral conveyor dynamic heating. Hot air circulation systems use a fan to drive high-temperature airflow through the granule layer for heat exchange; electric heating plate devices rely on the contact between the granules and the heating plate to transfer heat; and spiral conveyor systems use an auger structure with a heating jacket for continuous conveying and heating.
[0003] Traditional solutions generally suffer from the difficulty of simultaneously achieving efficient and uniform heat transfer. Specifically, hot air circulation devices are limited by airflow path design flaws, easily leading to temperature gradients within the particle layer. While surface particles overheat and adhere, deeper particles fail to reach the target temperature. Electric heating plates rely on particle weight for compaction, leaving residual air between particles that forms an insulating layer, drastically reducing heat transfer efficiency in the core area. While spiral conveyor heating can achieve dynamic mixing, the short contact time between the metal spiral blades and particles, coupled with mechanical shearing causing material wear, and the coaxial structure of the heating jacket and spiral shaft resulting in uneven axial temperature distribution, all contribute to the problem. Therefore, a preheating device that can achieve uniform preheating of materials without damaging the particles is needed to address the issues present in existing technologies. Summary of the Invention
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an ABS plastic granule preheating device.
[0005] The technical solution of this utility model is: an ABS plastic granule preheating device, comprising a conical box, an air inlet duct, a box cover, a gas collecting hood, a partition, a feed pipe, a discharge pipe, a transfer pipe, a expansion pipe, and a guide pipe. An air inlet is located on the lower front side of the conical box, and an air inlet duct is installed at the air inlet. A box cover is located on the top of the conical box. A partition is located inside the conical box, dividing the interior of the conical box into two cavities: a preheating cavity and a collecting cavity. A gas collecting hood is located on the left side of the box cover, and the gas collecting hood communicates with the preheating cavity of the conical box. The pipe introduces the heat flow into the preheating chamber of the conical box. The airflow flows upward in the preheating chamber and is discharged through the gas collection hood. A feed pipe is provided on the upper left side of the conical box, which is connected to the preheating chamber of the conical box. A discharge pipe is installed on the lower right side of the conical box, which is connected to the collection chamber inside the conical box. A transfer pipe is connected to the gas collection hood. The transfer pipe is provided with at least one expansion pipe. Each expansion pipe is provided with a guide pipe at its lower part. The lower end of each guide pipe passes through the box cover and extends into the upper part of the collection chamber. The expansion pipe is connected to the collection chamber through the guide pipe.
[0006] Furthermore, it also includes a diversion pipe. The inside of the expansion pipe is equipped with a diversion pipe. The pipe openings at both ends of the diversion pipe are concentric with the pipe openings of the expansion pipe. An annular cavity is formed between the outer wall of the diversion pipe and the inner wall of the expansion pipe. The feed guide pipe is connected to the annular cavity in the same expansion pipe.
[0007] Furthermore, it also includes partitions, distribution plates, and guide plates. The lower part of the conical box is provided with multiple partitions, which divide the lower part of the conical box into multiple air inlet chambers. There are multiple air inlets on the front side of the lower part of the conical box, and the number of air inlets is the same as the number of air inlet chambers. The rear end of the air inlet duct surrounds all the air inlets. The left side of the conical box is provided with a distribution plate, which is generally arched upwards. The right side of the distribution plate is connected to the partition. The distribution plate divides the preheating chamber in the conical box into two spaces distributed vertically. The feed pipe is connected to the space above the distribution plate. The upper left side of the conical box is provided with symmetrical guide plates. The right side of the two guide plates is connected to the partition. The guide plates are used to gather the upward airflow in the preheating chamber to one side of the air collection hood.
[0008] Furthermore, it also includes a dust collector, a return pipe, and a discharge pipe. The end of the material transfer pipe is connected to the dust collector, the front of the dust collector is connected to the return pipe, the other end of the return pipe is connected to and communicates with the air inlet pipe, and the lower part of the dust collector is provided with a discharge pipe.
[0009] Furthermore, it also includes transparent windows, with transparent windows provided on both the left and right sides of the cone-shaped box.
[0010] The beneficial effects are: 1. Through the partitioned design of the preheating chamber and the collection chamber in the conical box, the material is uniformly heated along the preheating chamber under the drive of heat flow before entering the transfer pipe. The airflow disturbance caused by the sudden change in pipe diameter causes the material to separate autonomously and be directed into the collection chamber. During the continuous transmission process, the material and heat flow are fully penetrated and contacted, which not only avoids uneven local heating caused by particle accumulation, but also maintains the smooth flow of material through the dynamic separation mechanism, significantly improving the preheating efficiency and the rationality of heat energy utilization.
[0011] 2. This utility model integrates a multi-stage cyclone dust removal component at the end of the material transfer pipe and connects it to an arc-shaped return pipe, so that the dust-laden hot flow after material separation removes fine particles. The purified hot flow is then reinjected into the preheating chamber through a sealed conduit for recycling. This not only eliminates environmental pollution caused by dust overflow, but also reduces the need for external heat energy replenishment through internal airflow circulation. Attached Figure Description
[0012] Figure 1 is a three-dimensional structural diagram of this utility model.
[0013] Figure 2 is a first cross-sectional view of this utility model.
[0014] Figure 3 is a second cross-sectional view of this utility model.
[0015] Figure 4 is a three-dimensional structural diagram of the material transfer tube, the expansion tube, and the diversion tube of this utility model.
[0016] Figure 5 is a three-dimensional structural diagram of the conical box, discharge pipe, and dust removal and return mechanism of this utility model.
[0017] The markings in the diagram are as follows: 1-conical box, 2-air inlet duct, 21-partition, 22-transparent window, 3-box cover, 31-air collection hood, 32-partition plate, 321-preheating chamber, 322-collecting chamber, 4-feed pipe, 5-discharge pipe, 6-material transfer pipe, 61-expansion pipe, 62-material guide pipe, 63-diversion pipe, 7-dust collector, 71-return pipe, 72-discharge pipe, 8-distribution plate, 81-guide plate. Detailed Implementation
[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0019] Example 1
[0020] An ABS plastic granule preheating device, as shown in Figures 1-5, includes a conical box 1, an air inlet duct 2, a box cover 3, a gas collection hood 31, a partition 32, a feed pipe 4, a discharge pipe 5, a transfer pipe 6, a diffuser pipe 61, and a guide pipe 62. An air inlet is located on the lower front side of the conical box 1, and the air inlet duct 2 is sealed at the air inlet by a flange. The air inlet duct 2 is connected to an external hot air generator, stably introducing high-temperature airflow into the conical box 1. The box cover 3 is bolted to the top of the conical box 1. A partition 32 is welded inside the conical box 1, dividing the interior of the conical box 1 into two independent cavities: a preheating cavity 321 and a collection cavity 322. 21 has a conical structure that is wider at the bottom and narrower at the top. Its tapered design allows the heat flow to form a gradually narrowing channel during the upward process, which enhances the airflow speed. The collecting chamber 322 has a conical structure that is wider at the top and narrower at the bottom. Its lowest point is close to the discharge pipe 5. Gravity causes the material to gather towards the discharge port. A gas collecting hood 31 is welded to the left side of the box cover 3. The gas collecting hood 31 is connected to the top of the preheating chamber 321 of the conical box 1 through a rectangular opening, forming an airflow discharge channel. The air inlet pipe 2 introduces the heat flow into the preheating chamber 321 of the conical box 1. The airflow is guided upward by the conical structure in the preheating chamber 321 and discharged through the gas collecting hood 31. This upward airflow is opposite to the direction of gravity, which effectively prolongs the residence time of the particles in the preheating chamber.
[0021] A feed pipe 4 is welded to the upper left side of the conical box 1. The feed pipe 4 connects to the upper part of the preheating chamber 321 of the conical box 1 through a 45° inclined transition section. The height of its feed inlet is located at 2 / 3 of the vertical height of the preheating chamber, ensuring that the material is fully enveloped by the rising heat flow when it is poured in. A discharge pipe 5 is installed on the lower right side of the conical box 1 via a clamp. The discharge pipe 5 connects to the lower part of the collection chamber 322 inside the conical box 1, and its outlet end can be connected to a negative pressure material extraction component, such as a cyclone separator or a vacuum feeder, to extract material through negative pressure. The material accumulated in the collection chamber 322 is quickly extracted. The special conical design of the baffle 32 not only achieves spatial separation, but also guides the flow of material through the principle of fluid mechanics: the conical structure of the preheating chamber 321 creates a negative pressure zone during the upward flow of heat, blowing the material sprinkled in by the feed pipe 4 upward. During the upward transport process, the particles and the heat flow form a countercurrent contact mode, achieving uniform preheating through the dual effects of heat convection and heat conduction; the conical structure of the collection chamber 322 uses gravity to allow the material to slide naturally towards the discharge pipe 5, avoiding material residue.
[0022] A material transfer pipe 6 is connected to the gas collection hood 31 via a flange. Multiple expansion pipes 61 are welded at intervals along the material transfer pipe 6. By suddenly expanding the pipe diameter, the airflow velocity distribution is changed. A guide pipe 62 is welded to the lower part of each expansion pipe 61. The lower end of the guide pipe 62 passes through the reserved hole of the cover 3 and extends into the upper part of the collection chamber 322. Utilizing the mass difference between the particles and the airflow, the airflow spreads rapidly following the pipe diameter change, and the vortex effect generated by the diameter change of the expansion chamber causes the particles to experience velocity attenuation and change flow direction within the expansion pipe 61. The airflow is transported along its original path under inertia, while the particles, due to their larger mass, are affected by the diameter change after entering the expansion chamber, resulting in velocity attenuation and change flow direction, causing them to slide along the pipe wall. Within the expansion chamber of the expansion pipe 61, the sudden expansion of the pipe diameter also generates a significant vortex effect, further weakening the particle velocity and causing it to deviate from the airflow path. Finally, under the action of gravity, the particles are smoothly discharged into the collection chamber 322 through the guide pipe 62, thereby achieving efficient gas-solid separation.
[0023] As shown in Figures 2 and 4, the system also includes a diverter pipe 63. The interior of each expansion pipe 61 is concentrically welded with a diverter pipe 63. The openings at both ends of the diverter pipe 63 are concentric with the openings of the expansion pipe 61, and an annular cavity is formed between the outer wall of the diverter pipe 63 and the inner wall of the expansion pipe 61. This annular cavity is connected to the material channel within the same expansion pipe 61 via a feed guide pipe 62, forming a unique dual-channel structure: the diverter pipe 63 delivers high-speed airflow at its center, maintaining airflow transmission; the annular cavity utilizes the boundary layer effect of the airflow to separate particles, achieving airflow separation via the feed guide pipe 62. Solid-liquid separation allows particles to be guided into the collection chamber through the annular cavity, while the remaining airflow continues to move through the diverter. This ensures efficient material transfer while reducing airflow interference with the collection chamber. When the dust-laden airflow enters the expansion pipe 61, the high-speed airflow maintains its original speed within the diverter 63, while the airflow in the annular cavity generates a velocity gradient due to the increased pipe diameter. This causes the particles to detach from the main airflow channel due to inertia. This differential speed separation mechanism further improves separation efficiency. At the same time, the presence of the diverter 63 avoids the risk of blockage caused by the expansion pipe directly serving as a material channel, ensuring long-term stable operation of the system.
[0024] Example 2
[0025] Based on Embodiment 1, as shown in Figures 2 and 3, it further includes partitions 21, distribution plates 8, and guide plates 81. Multiple partitions 21 are provided in the lower part of the conical box 1, dividing the lower part of the conical box 1 into multiple air intake chambers. This division method makes the air intake more uniform, and each air intake chamber can independently receive airflow from the air intake duct 2, reducing turbulence and backflow after airflow deflection. Multiple air inlets are provided on the lower front side of the conical box 1, with the number of inlets matching the number of air intake chambers, ensuring that each air intake chamber has a corresponding air inlet. The rear end of the air intake duct 2 surrounds all the air inlets, allowing the airflow to be evenly distributed to each air intake chamber. A distribution plate 8 is provided on the left side of the conical box 1, with the distribution plate 8 having an upward arched shape. Its right side is connected to the partition 32. This connection relationship allows the distribution plate 8... The material is securely fixed inside the conical box 1. The preheating chamber 321 inside the conical box 1 is divided into two spaces, one above the other, by the distribution plate 8. The feed pipe 4 is connected to the space above the distribution plate 8. In this way, the material will fall directly into the space above the distribution plate 8 after entering from the feed pipe 4. The distribution plate will evenly divide the upward airflow into multiple airflows, so that the particles can fully contact the hot air rising from the air inlet chamber and achieve efficient preheating. The upper left side of the inner side of the conical box 1 is provided with symmetrical guide plates 81. The right side of the two guide plates 81 is connected to the partition plate 32. This symmetrical and stable connection relationship allows the guide plates 81 to effectively gather the upward airflow in the preheating chamber 321 to one side of the gas collection hood 31, which improves the concentration of the airflow and the ability to carry materials, so that the preheated material can be carried to the subsequent processing stage more smoothly by the airflow.
[0026] As shown in Figures 1 and 5, the system also includes a dust collector 7, a return pipe 71, and a discharge pipe 72. The end of the material transfer pipe 6 is connected to the dust collector 7. The material and airflow conveyed from the material transfer pipe 6 first enter the dust collector 7 for dust removal. The front of the dust collector 7 is connected to the return pipe 71, and the other end of the return pipe 71 is connected to and communicates with the air inlet pipe 2. The purified hot airflow after dust removal can return to the air inlet pipe 2 through the return pipe 71, realizing the recycling of heat energy and reducing energy consumption. The lower part of the dust collector 7 is provided with a discharge pipe 72. The material after dust removal is discharged through the discharge pipe 72, avoiding the influence of impurities in the material on subsequent processing steps and ensuring the purity of the product.
[0027] As shown in Figures 1, 2, and 5, the system also includes transparent viewing windows 22. Transparent viewing windows 22 are provided on both the left and right sides of the conical box 1. Operators can directly observe the conditions inside the preheating chamber 321 and the collection chamber 322 through the transparent viewing windows 22 without opening the box. This facilitates operation and ensures the box's airtightness. Through the transparent viewing windows 22, operators can monitor the preheating status of the material, the distribution of airflow, and the accumulation of material in the collection chamber in real time, thereby adjusting process parameters promptly to ensure stable system operation and efficient processing.
[0028] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.
Claims
1. An ABS plastic granule preheating device, comprising a conical box (1); characterized in that: It also includes an air inlet duct (2), a box cover (3), a gas collection hood (31), a partition (32), a feed pipe (4), a discharge pipe (5), a transfer pipe (6), a burst expansion pipe (61), and a guide pipe (62). The lower front of the conical box (1) has an air inlet, and an air inlet duct (2) is installed at the air inlet. The top of the conical box (1) is provided with a box cover (3). The inside of the conical box (1) is provided with a partition (32), which divides the inside of the conical box (1) into two cavities, namely a preheating cavity (321) and a collection cavity (322). The left side of the box cover (3) is provided with a gas collection hood (31), which is connected to the preheating cavity (321) of the conical box (1). The air inlet duct (2) introduces the heat flow into the preheating cavity (321) of the conical box (1). Inside 21), the airflow flows upward in the preheating chamber (321) and is discharged through the gas collection hood (31). The upper left side of the cone-shaped box (1) is provided with a feed pipe (4), which is connected to the preheating chamber (321) of the cone-shaped box (1). The lower right side of the cone-shaped box (1) is provided with a discharge pipe (5), which is connected to the collection chamber (322) inside the cone-shaped box (1). The gas collection hood (31) is connected to and connected with a transfer pipe (6). The transfer pipe (6) is provided with at least one expansion pipe (61). The lower part of the expansion pipe (61) is provided with a guide pipe (62). The lower end of the guide pipe (62) passes through the box cover (3) and extends into the upper part of the collection chamber (322). The expansion pipe (61) is connected to the collection chamber (322) through the guide pipe (62).
2. The ABS plastic granule preheating device as described in claim 1, characterized in that: It also includes a diversion pipe (63), and the interior of the expansion pipe (61) is provided with a diversion pipe (63). The pipe openings at both ends of the diversion pipe (63) are concentric with the pipe openings of the expansion pipe (61), and an annular cavity is formed between the outer wall of the diversion pipe (63) and the inner wall of the expansion pipe (61). The feed pipe (62) is connected to the annular cavity in the same expansion pipe (61).
3. The ABS plastic granule preheating device as described in claim 2, characterized in that: It also includes partitions (21), distribution plates (8), and guide plates (81). Multiple partitions (21) are provided in the lower part of the conical box (1), dividing the lower part of the conical box (1) into multiple air inlet chambers. Multiple air inlets are provided on the front side of the lower part of the conical box (1), with the number of inlets matching the number of air inlet chambers. The rear end of the air intake duct (2) surrounds all the air inlets. A distribution plate (8) is provided on the left side of the conical box (1), with the distribution plate (8) having an upward-arched shape. The right side of the plate (8) is connected to the partition plate (32). The distribution plate (8) divides the preheating chamber (321) in the conical box (1) into two spaces with upper and lower distribution. The feed pipe (4) is connected to the space above the distribution plate (8). The upper left side of the inner side of the conical box (1) is provided with symmetrical guide plates (81). The right side of the two guide plates (81) is connected to the partition plate (32). The guide plates (81) are used to gather the upward airflow in the preheating chamber (321) to one side of the gas collection hood (31).
4. The ABS plastic granule preheating device as described in claim 3, characterized in that: It also includes a dust collector (7), a return pipe (71) and a discharge pipe (72). The end of the material transfer pipe (6) is connected to the dust collector (7), the front of the dust collector (7) is connected to the return pipe (71), the other end of the return pipe (71) is connected to the air inlet pipe (2) and communicates with it. The lower part of the dust collector (7) is provided with a discharge pipe (72).
5. The ABS plastic granule preheating device as described in claim 4, characterized in that: It also includes transparent windows (22), with transparent windows (22) provided on both the left and right sides of the cone-shaped box (1).