A granule collecting device for plastic particle production

Abstract

This utility model relates to the field of plastic granule production technology, specifically a granule collection device for plastic granule production, including a drying box and a screening box. The drying box has a horizontal drying chamber with a hot air blower at one end and a hopper at the top. The screening box is located below the drying box and the two are connected. The screening box has an inclined screening plate with sieve holes whose diameter gradually increases along the direction of granule descent. A spring and a vibration motor are installed between the screening plate and the inner wall of the screening box. By setting up a drying box with integrated hot air drying function and a screening box with vibration screening function, this utility model fundamentally solves the industry problem of wet and sticky materials clogging the sieve holes and causing incomplete screening, significantly improving the efficiency, accuracy and adaptability of screening and collection.

Description

Technical Field

[0001] This utility model relates to the field of plastic pellet production technology, specifically to a pellet collection device for plastic pellet production. Background Technology

[0002] Plastic granules are products made from resin materials and are widely used in various plastic products. During the production of plastic granules, a collection and screening device is required to collect and screen the granules.

[0003] In the prior art, the authorized Chinese utility model patent CN223211701U discloses a particle collection device for plastic granule production, which uses a vibrating motor and guide assembly to drive the screening plate to vibrate, thereby solving the problem of poor screening effect caused by particle accumulation. However, this prior art still has significant shortcomings: its screening process is mainly for granules that are dry at room temperature. When the plastic granules have high moisture content or are statically charged, the granules are very prone to sticking together and agglomerating. The agglomerated clumps are difficult to disperse effectively during the vibrating screening process, which not only seriously clogs the screen holes, causing a sharp drop in screening efficiency, but also results in the mixed collection of particles of different sizes, making it impossible to achieve accurate grading and affecting the quality of the final product and subsequent processing. In addition, the device lacks a pretreatment unit for moist materials, resulting in poor adaptability.

[0004] Therefore, how to provide a device that can effectively process wet and sticky plastic particles, avoid screen clogging, and ensure efficient and accurate screening and collection is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a particle collection device for plastic particle production, in order to solve the problem in the prior art that wet and sticky plastic particles are prone to sticking together and clogging the screen holes during screening, resulting in low screening efficiency and accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A pellet collection device for plastic pellet production includes a drying box and a screening box.

[0008] The drying chamber is equipped with a horizontal drying cavity, with a hot air blower at one end and a hopper at the top.

[0009] The sieving box is located below the drying box and the two are connected. It contains an inclined sieving plate with sieve holes whose diameter gradually increases along the direction of particle descent. A spring and a vibration motor are installed between the sieving plate and the inner wall of the sieving box.

[0010] The bottom of the screening box is equipped with multiple conical collecting hoppers, which are located below the screening plate and have solenoid valves at the bottom.

[0011] Preferably, a flow equalization plate is provided at the connection between the hot air blower and the drying chamber.

[0012] Preferably, the discharge port of the hopper is positioned opposite the inlet of the screening box.

[0013] Preferably, the sieve plate has vertical baffles on both sides.

[0014] Preferably, the spring is located on a mounting plate below the screening plate and connected to the inner wall of the screening box.

[0015] Preferably, the output end of the vibrating motor is connected to the side wall of the sieve plate.

[0016] Preferably, the bottom of the screening box is equipped with a support frame.

[0017] Preferably, the top opening of the conical collecting hopper is located below the sieve plate.

[0018] The beneficial effects of this utility model are:

[0019] This invention provides a novel plastic granule collection device by integrating a drying chamber with a hot air drying function and a screening box with a vibrating screening function. Moist or easily sticky plastic granules first enter the drying chamber, where they are evenly dried by horizontal hot air, effectively removing surface moisture and reducing stickiness, preventing granule clumping at the source. The pre-treated, dry, and loose granules then enter the screening box, where they are vibrated and screened on an inclined screening plate with gradually increasing apertures along the downward direction. Since the granules are no longer sticky, the vibration process efficiently spreads them out, allowing them to pass through screens of different apertures sequentially, achieving precise grading. The graded granules finally fall into the corresponding conical collection hopper and are discharged under the control of a solenoid valve at the bottom. This solution fundamentally solves the industry problem of wet, sticky materials clogging screen holes and incomplete screening, significantly improving the efficiency, accuracy, and adaptability of screening and collection. Attached Figure Description

[0020] Figure 1 This is a first-person view structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0022] Figure 3 This utility model Figure 1 Frontal sectional view of the structure;

[0023] Figure 4 This is a schematic diagram of the sieve plate installation structure of this utility model.

[0024] In the picture:

[0025] 1. Drying box; 11. Drying chamber; 12. Hot air blower; 13. Flow equalization plate; 14. Hopper; 2. Screening box; 21. Screening plate; 22. Screen hole; 23. Baffle; 24. Mounting plate; 25. Spring; 26. Vibrating motor; 27. Support frame; 3. Conical collection hopper; 31. Solenoid valve. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and complete.

[0028] Example 1, please refer to Figure 1-4 This utility model provides a technical solution: a granule collection device for plastic granule production, which mainly consists of a drying box 1 and a screening box 2 arranged vertically.

[0029] like Figure 1-3 As shown, the drying chamber 1 is a horizontally arranged box with a horizontally penetrating drying cavity 11 inside. A hot air blower 12 is fixedly installed on the outer wall of one end of the drying chamber 1. The air outlet of the hot air blower 12 is directly connected to the inlet of the drying cavity 11. Inside this connection, a flow equalization plate 13 is vertically fixedly installed. The flow equalization plate 13 is densely covered with through holes to disperse the high-speed hot air blown out by the hot air blower 12, transforming it into a uniform and stable horizontal airflow that fills the entire drying cavity 11. At the top center of the drying chamber 1, a hopper 14 is fixedly installed. The discharge port of the hopper 14 extends downward and connects to the top of the drying cavity 11. The plastic granules to be processed are fed into the drying cavity 11 through the hopper 14.

[0030] To ensure drying efficiency and avoid interfering with the vertical descent of particles, the hot air system of this device is designed in a coordinated manner. The hot air blower 12 can provide a low-speed, constant-temperature airflow. After being rectified by the flow equalization plate 13, this airflow forms a stable, uniform, and low-velocity (typically below 2.5 m / s) horizontal hot air curtain within the drying chamber 11.

[0031] Its working mechanism is as follows: After the plastic granules enter the drying chamber 11 from the hopper 14, they fall freely under the action of gravity. Since their initial velocity is zero and there is friction and collision between the granules during dense feeding, the falling process is not an ideal high-speed linear motion, but has a certain degree of dispersion and hang time. At the same time, a low-speed horizontal hot air curtain runs across the entire falling area.

[0032] During this process, the falling particles undergo thorough penetrating contact and heat exchange with the low-velocity hot air. The main function of the hot air is not to accelerate the particles by impacting them at high speed, but rather to evaporate the moisture on the particle surface through continuous and gentle convective heat transfer, which is then carried away by the airflow. Due to the low airflow velocity, its interference with the vertical trajectory of the particles is negligible, and the particles can still fall into the screening box 2 below along the expected path.

[0033] The drying chamber 11 has a sufficient length in the direction of hot air flow (typically more than 1.5 times the height of particle fall), which allows:

[0034] The particles have sufficient travel distance to pass through the hot air zone;

[0035] The hot and humid exhaust gas can be smoothly guided to the exhaust port on the other side (not shown in the figure, which is a conventional design in this field) to be discharged, avoiding the formation of turbulence or saturated steam in the cavity, thereby ensuring continuous drying capacity.

[0036] By adjusting the wind speed and temperature of the hot air blower 12, this device can adapt to the pretreatment requirements of plastic granules with different humidity and output, ensuring that they reach a dry and loose state before entering the screening process.

[0037] like Figure 1-2 As shown, the screening box 2 is fixedly installed directly below the drying chamber 1, and the two are connected by a vertical channel. The upper opening of this channel is the bottom outlet of the drying chamber 11, and the lower opening forms the feed inlet of the screening box 2. The feed inlet is positioned directly opposite the discharge port of the upper hopper 14, ensuring that the material falling from the drying chamber 11 can accurately enter the screening box 2.

[0038] like Figure 3-4 As shown, the core of the screening box 2 is an inclined screening plate 21. The higher end of the screening plate 21 is located below the feed inlet, and the lower end points to the other side of the screening box 2. On the surface of the screening plate 21, multiple sets of screen holes 22 are formed along the direction from the high end to the low end. The aperture of these screen holes 22 is set in a gradual manner, specifically, the aperture gradually transitions from a small aperture at the high end to a large aperture at the low end, so as to screen particles of different sizes step by step. The screening plate 21 has three sets of screen holes 22, with apertures of 2mm, 3mm and 4mm respectively from the high end to the low end. Baffles 23 are fixedly installed vertically upward on both sides of the screening plate 21 to prevent particles from slipping off the sides.

[0039] like Figure 4 As shown, the elastic support structure of the screening plate 21 is as follows: At each of its two ends below the plate surface, there is a mounting plate 24. The mounting plates 24 are vertically fixed to the inner wall of the screening box 2. A spring 25 is connected between each mounting plate 24 and the bottom surface of the screening plate 21. The two ends of the spring 25 are fixedly connected to the top of the mounting plate 24 and the bottom surface of the screening plate 21, respectively, thereby elastically suspending the screening plate 21. Furthermore, at least one vibration motor 26 is fixedly installed on the lower side wall of the screening plate 21. The housing of the vibration motor 26 is fixed to the inner wall of the screening box 2, and its output shaft is drivenly connected to the side wall of the screening plate 21. When the vibration motor 26 operates, it drives the entire screening plate 21 to generate high-frequency micro-amplitude vibrations under the elastic constraint of the spring 25.

[0040] like Figure 1-3 As shown, two symmetrically distributed support frames 27 are fixedly installed at the bottom of the sieve box 2 to stably support the entire device on the ground. Multiple conical collecting hoppers 3 are fixedly installed on the bottom plate of the sieve box 2, directly below the sieve plate 21. The number of conical collecting hoppers 3 matches the number of sets of sieve holes 22 on the sieve plate 21, and their large openings at the top are located below the sieve plate 21 to collect particles falling through the corresponding area of ​​the sieve holes 22. A solenoid valve 31 is installed at the small conical outlet at the bottom of each conical collecting hopper 3 to control particle discharge.

[0041] The working process of this utility model is as follows:

[0042] The plastic granules to be collected and screened are first added from hopper 14 and fall into the drying chamber 11 of drying box 1. At the same time, hot air blower 12 is started, and the generated medium-low temperature hot air is evenly distributed by flow equalization plate 13 to form a stable horizontal hot air curtain, which blows laterally across the falling granules. As the granules pass through the hot air curtain, the surface moisture is rapidly evaporated, and the stickiness caused by humidity or static electricity is greatly reduced, making them dry and loose.

[0043] The pre-dried granules then fall into the screening box 2 through the connecting channel and land on the high end of the inclined screening plate 21. At this time, the vibration motor 26 starts, causing the screening plate 21 and the granules on it to vibrate continuously. The dried and loose granules bounce and disperse under the vibration, and slide down the inclined plate surface to the lower end. During the sliding process, the smallest granules first reach the area of ​​the small-aperture screen 22 at the high end, and pass through the screen 22 under the vibration, falling into the first conical collection hopper 3 directly below. The remaining granules continue to slide down, and the slightly larger granules are screened out in the middle area of ​​the screen 22 and fall into the corresponding collection hopper. The largest granules and materials that fail to pass through the corresponding screen 22 due to their shape or other reasons finally slide out from the lower end of the screening plate 21 and fall into the last collection hopper. Thus, the plastic granules are accurately classified and collected according to their particle size.

[0044] When the amount of particles in a conical collection hopper 3 reaches a certain level, the solenoid valve 31 at the bottom of the hopper can be opened to discharge the particles into an external packaging bag or container. After the discharge is completed, the solenoid valve 31 is closed. The whole process can be carried out continuously or intermittently.

[0045] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pellet collecting device for plastic pellet production, characterized in that, Includes a drying box (1) and a screening box (2); The drying box (1) is provided with a horizontal drying chamber (11), a hot air blower (12) is provided at one end, and a hopper (14) is provided at the top of the drying chamber (11). The sieve box (2) is located below the drying box (1) and the two are connected. It has an inclined sieve plate (21) inside. The sieve plate (21) has sieve holes (22) with the aperture gradually increasing along the direction of particle sliding. A spring (25) and a vibration motor (26) are provided between the sieve plate (21) and the inner wall of the sieve box (2). The bottom of the sieving box (2) is provided with multiple conical collecting hoppers (3), which are located below the sieving plate (21) and have solenoid valves (31) at the bottom.

2. The granule collecting device for plastic granule production according to claim 1, characterized in that, A flow equalization plate (13) is provided at the connection between the hot air blower (12) and the drying chamber (11).

3. The pellet collecting device for plastic pellet production according to claim 1, characterized in that, The discharge port of the hopper (14) is opposite to the feed port of the screening box (2).

4. The pellet collecting device for plastic pellet production according to claim 1, characterized in that, The sieve plate (21) has vertical baffles (23) on both sides.

5. The granule collecting device for plastic granule production according to claim 1, characterized in that, The spring (25) is located on the mounting plate (24) below the sieve plate (21) and connected to the inner wall of the sieve box (2).

6. The granule collecting device for plastic granule production according to claim 1, characterized in that, The output end of the vibration motor (26) is connected to the side wall of the sieve plate (21).

7. The granule collecting device for plastic granule production according to claim 1, characterized in that, The bottom of the screening box (2) is provided with a support frame (27).

8. The granule collecting device for plastic granule production according to claim 1, characterized in that, The top opening of the conical collecting hopper (3) is located below the sieve plate (21).

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