A multi-stage cooling molding device for resin particles

Abstract

The utility model discloses a resin particle multistage cooling forming device mainly includes the vibration fluidized bed unit of three series, and each stage integrated independent temperature control bellows, heating / refrigeration double module and vibration motor. Through the gradient temperature control of high temperature area (80-100 DEG C), medium temperature area (40-60 DEG C) and low temperature area (10-25 DEG C), combining adjustable inclination and variable frequency vibration, the progressive cooling of resin particle is realized, adopts the interstage heat recovery system, and the exhaust gas of low temperature area is recycled to high temperature area after purification and is utilized again, and the comprehensive energy consumption reduces 35%. The discharge end is equipped with the cyclone separator and promotes the finished product purity, and the device solves the problem of uneven temperature, particle caking and high energy consumption of traditional cooling process, and is suitable for the continuous production of thermoplastic resin.

Description

Technical Field

[0001] This utility model relates to the technical field of polymer material processing equipment, specifically a multi-stage cooling and molding device for resin particles. Background Technology

[0002] Existing single-stage cooling equipment (such as water tank cooling or single-duct cooling) is prone to causing internal stress in resin particles due to sudden cooling, which can lead to deformation or cracking. Uneven cooling causes particles to stick together, resulting in high energy consumption during subsequent drying. Low cooling efficiency in continuous production has become a bottleneck for production capacity. The patent with patent number CN202421032203.4 proposes "a multi-stage cooling device for plastic granules", but the thermal stress of this technology is uncontrollable: the granules are rapidly cooled at a single water temperature, and due to the lack of a temperature gradient regulation mechanism, the cracking rate exceeds 3%. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-stage cooling and molding device for resin particles in order to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution: This utility model proposes a multi-stage cooling molding device for resin particles, comprising: a three-stage cooling unit, each stage of which includes: a vibrating fluidized bed, an independent temperature-controlled air box, and a vibrating motor; The vibrating fluidized bed is inclined; the independent temperature control air box is located below the vibrating fluidized bed; the vibrating motor is located on the side of the vibrating fluidized bed and drives the bed body through a universal joint; the temperature control air box integrates a heater and a cooler respectively. The piezoelectric ceramic transducer array is embedded in the inner surface of the sidewall of the vibrating fluidized bed and connected to a high-frequency drive power supply. The temperature gradient of the three-stage cooling unit is set as follows: High temperature zone: 80℃–100℃; Medium temperature range: 40℃–60℃; Low temperature zone: 10℃–25℃.

[0005] As a preferred embodiment of this utility model, the driving mode of the piezoelectric ceramic transducer is as follows: Continuous standing wave mode (high temperature zone) prevents molten particles from sticking together; Pulse sweep frequency mode (medium and low temperature range) promotes particle dispersion.

[0006] As a preferred embodiment of this invention, the inclination angle of the vibrating fluidized bed is 5°–15°, and the adjustable vibration frequency range is 10–50 Hz.

[0007] As a preferred technical solution of this utility model, it also includes a heat recovery system, with the stages connected by airflow pipes, and the exhaust gas in the low-temperature zone is purified and then transported to the high-temperature zone for reuse.

[0008] As a preferred embodiment of this utility model, the cooling unit is fed into the vibrating fluidized bed by a screw conveyor at the inlet end and is equipped with a cyclone separator at the outlet end.

[0009] The beneficial effects of this utility model are as follows: 1. Graded temperature control prevents damage. Three-stage gradient cooling (100℃→60℃→25℃) completely eliminates thermal stress, reducing particle cracking rate to <0.1%.

[0010] 2. Compact structure increases production capacity; series design improves cooling efficiency by 86% compared to traditional single-stage cooling (production capacity reaches 2.8t / h).

[0011] 3. Vibration fluidization achieves zero adhesion; air cushion suspension + mechanical vibration enables frictionless flow of particles, improving surface smoothness by 2 levels. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a logic diagram of the present invention.

[0013] Reference numerals: 1. Cooling unit; 2. Vibrating fluidized bed; 3. Independent temperature-controlled air box; 4. Vibrating motor; 5. Screw conveyor; 6. Cyclone separator. Detailed Implementation

[0014] like Figures 1 to 2 As shown, this utility model proposes a multi-stage cooling molding device for resin particles, comprising: a three-stage cooling unit, each stage of which includes: a vibrating fluidized bed, an independent temperature-controlled air box, a heater, a cooler, and a vibrating motor; The vibrating fluidized bed is inclined; the independent temperature control air box is located below the vibrating fluidized bed; the vibrating motor is located on the side of the vibrating fluidized bed and drives the bed body through a universal joint; the temperature control air box integrates a heater and a cooler respectively. A piezoelectric ceramic transducer array is embedded in the inner surface of the sidewall of a vibrating fluidized bed and connected to a high-frequency drive power supply.

[0015] The temperature gradient of the three-stage cooling unit is set as follows: High temperature zone: 80℃–100℃; Medium temperature range: 40℃–60℃; Low temperature zone: 10℃–25℃.

[0016] The driving mode of the piezoelectric ceramic transducer is as follows: Continuous standing wave mode (high temperature zone) prevents molten particles from sticking together; Pulse sweep frequency mode (medium and low temperature range) promotes particle dispersion.

[0017] The inclination angle of the vibrating fluidized bed is 5°–15°, and the vibration frequency is adjustable in the range of 10–50 Hz.

[0018] It also includes a heat recovery system, with the stages connected by airflow pipes. The exhaust gas from the low-temperature zone is purified and then transported to the high-temperature zone for reuse.

[0019] The cooling unit is fed into the vibrating fluidized bed by a screw conveyor at the feed end and is equipped with a cyclone separator at the discharge end.

[0020] Working principle: Molten resin granules are fed from an extruder into a series of three independent vibrating fluidized beds. First, in the high-temperature zone (80–100℃), hot air provides initial surface curing, allowing the granules to slowly cool. Then, they automatically slide into the medium-temperature zone (40–60℃) by gravity, releasing their core heat under enhanced airflow. Finally, in the low-temperature zone (10–25℃), they are rapidly shaped by cold air. Throughout the process, the granules are suspended and transported by an air cushion within the vibrating fluidized bed, combined with nitrogen-sealed inter-stage transfer, achieving continuous gradient cooling with zero human contact. Waste heat is recovered via a closed-loop system to preheat fresh air, reducing energy consumption by 37.5% and completely eliminating thermal stress cracking and surface adhesion. Example 1

[0021] Taking the cooling of polypropylene resin granules as an example, molten granules enter the first-stage high-temperature vibrating fluidized bed via a screw feeder, where their surface is initially solidified under vibration at a 10° angle and a frequency of 15Hz, and under the action of 80°C hot air. Subsequently, the granules automatically fall into the second-stage medium-temperature zone by gravity (height 25cm, nitrogen protection), where they are primarily cooled in a 40°C airflow (vibration frequency 30Hz). Finally, they enter the third-stage low-temperature zone, where they are rapidly shaped by 10°C cold air (vibration frequency 45Hz) and then collected by a cyclone separator. The exhaust gas from the low-temperature zone is purified by an activated carbon filter and then transported to the high-temperature zone for reuse through a heat recovery pipeline. The overall energy consumption is reduced by 37.5%, the granule moisture content is <0.01%, and there is no cracking or deformation.

[0022] 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.

[0023] 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 multi-stage cooling and molding device for resin particles, characterized in that: It includes a three-stage cooling unit (1), each stage of the cooling unit (1) includes: a vibrating fluidized bed (2), an independent temperature-controlled air box (3) and a vibrating motor (4); The vibrating fluidized bed (2) is inclined; the independent temperature control air box (3) is located below the vibrating fluidized bed (2); the vibrating motor (4) is located on the side of the vibrating fluidized bed (2) and drives the bed body through a universal joint; the temperature control air box integrates a heater and a cooler respectively; An array of piezoelectric ceramic transducers (7) is embedded in the inner surface of the sidewall of a vibrating fluidized bed and connected to a high-frequency drive power supply. The temperature gradient of the three-stage cooling unit (1) is set as follows: High temperature zone: 80℃–100℃; Medium temperature range: 40℃–60℃; Low temperature zone: 10℃–25℃.

2. The resin particle multi-stage cooling molding device according to claim 1, characterized in that: The inclination angle of the vibrating fluidized bed (2) is 5°–15°, and the vibration frequency is adjustable in the range of 10–50 Hz.

3. The resin particle multi-stage cooling molding device according to claim 1, characterized in that: It also includes a heat recovery system, with the stages connected by airflow ducts, so that the exhaust gas in the low-temperature zone is purified and then transported to the high-temperature zone for reuse.

4. The resin particle multi-stage cooling molding device according to claim 1, characterized in that: The cooling unit (1) is fed into the vibrating fluidized bed (2) by a screw conveyor (5) at the feed end, and a cyclone separator (6) is provided at the discharge end.

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