A performance detection device and detection process for plastic particle production

Abstract

The application discloses a performance detection device and detection process for plastic particle production, and relates to the technical field of plastic particle moisture content performance detection.The application forms a closed storage cavity by cooperating a conical cylinder with a conical cover, realizes uniform and regular arrangement of plastic particles, cooperates with a lifting linkage rotary extrusion structure and a cavity pressurization structure, can complete rotary kneading and extrusion water removal and pressurization auxiliary dehumidification operation on the particles before drying, quickly removes the water attached to the surface of the particles and the water retained in the gaps, overcomes the defects that the traditional detection only relies on low-temperature long-time drying, water removal is not complete, and particles are easy to lock water, can reasonably improve the drying temperature, avoids the problems that high temperature causes particle deformation and weight loss, and detection data distortion, effectively balances the detection accuracy and detection efficiency of the plastic particle moisture content detection, adapts to the demand of large-scale batch quality inspection operation, and guarantees the quality of the plastic particle product and the quality of subsequent processing and molding.

Description

Technical Field

[0001] This invention relates to the field of plastic particle moisture content performance testing technology, specifically to a performance testing device and testing process for plastic particle production. Background Technology

[0002] After the plastic particles prepared from the new modified materials are extruded, pelletized, and dried, their internal moisture content is a core key indicator for determining product quality and ensuring the quality of subsequent injection molding and extrusion processing. If the moisture content of the plastic particles exceeds the standard, defects such as bubbles, silver streaks, cracking, and uneven molding shrinkage are very likely to occur during subsequent high-temperature processing, seriously affecting the molding accuracy and structural strength of plastic products. Therefore, after the plastic particles are produced, a dedicated testing device must be used to accurately test their moisture content performance in order to control the quality of batch production.

[0003] Currently, the industry commonly uses the constant temperature drying and weighing method to test the moisture content of plastic particles. The core testing principle is to remove the moisture inside and on the surface of the plastic particles by heating and drying them. The moisture content value of the particles is calculated by accurately collecting the weight difference before and after heating and drying, thus completing the moisture content performance test. This testing method is simple to operate and has controllable basic testing accuracy, making it the mainstream quality inspection method in the production and processing of plastic particles.

[0004] However, existing traditional testing devices and methods still have significant defects and shortcomings in actual use: plastic particles are new polymer materials with limited thermal stability and high temperature sensitivity. If the drying temperature is too high, the plastic particles are prone to shrinkage, softening, or even local melting and deformation due to heat. This will not only cause the particles to lose weight, but also interfere with the calculation of the weight difference before and after drying, resulting in serious distortion of the moisture content test data and failing to truly reflect the actual moisture content of the particles. In order to avoid the particle deformation problem caused by high temperature, existing testing methods generally adopt a low-temperature long-term drying mode.

[0005] In the low-temperature drying mode, the evaporation rate of moisture inside the particles is slow, and the drying and dehumidification are incomplete. This can easily lead to internal water retention and local residual moisture, further reducing the detection accuracy. In addition, each detection takes a very long time, the detection process is cumbersome, and the detection efficiency is low. This cannot meet the quality inspection needs of large-scale and continuous production lines for plastic particles, and it is difficult to achieve rapid sampling and full inspection of batch particles. This seriously restricts the overall efficiency of quality inspection in the production of plastic particles, and there is a technical pain point in which detection accuracy and detection efficiency cannot be balanced.

[0006] Meanwhile, traditional testing devices rely solely on a single heating and drying mode to remove water, which cannot quickly remove water accumulated between plastic particles or free water on the surface. In the state of particle accumulation, there are problems of moisture retention and uneven heating during drying, which further aggravates the testing error and testing time. This cannot meet the high-precision and high-efficiency moisture content testing requirements of high-quality plastic particles. Therefore, we propose a performance testing device and testing process for plastic particle production. Summary of the Invention

[0007] The purpose of this invention is to provide a performance testing device and testing process for plastic particle production, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a performance testing device for plastic particle production, comprising a testing cylinder for testing the moisture content of spherical plastic particles, wherein multiple sets of support platforms are fixed to the bottom of the testing cylinder, multiple sets of feed inlets are installed on the testing cylinder and are arranged in an inwardly inclined state, and a discharge port for discharging the material after testing is provided at the bottom of the testing cylinder, and further comprising: A feeding assembly, located inside the detection cylinder, is used to feed and place spherical plastic particles after they have been fed in. The feeding heating assembly includes a conical cylinder located inside the detection cylinder. A constant temperature drying component is provided on the conical cylinder. A conical cavity for feeding is opened inside the conical cylinder. An extrusion assembly for extruding the spherical plastic particles inside the conical cavity is provided inside the detection cylinder. The extrusion assembly includes a lifting cylinder. A conical cover is fixed to the bottom of the lifting cylinder. The conical cover is located inside the conical cavity, and the cones are matched with each other. A storage cavity for storing spherical plastic particles is formed between the outer side of the conical cover and the inner side of the conical cavity. A lifting assembly is used to control the lifting of the extrusion assembly. The extrusion assembly is provided with a rotating assembly for rotating and extruding after descent and a pressurizing assembly for pressurizing the inside of the storage chamber after descent. A sealing assembly for assisting in sealing the inside of the storage chamber after descent is provided between the lifting cylinder and the conical cylinder. And a detection and identification component installed inside the detection cylinder for detecting and identifying changes in the moisture content of spherical plastic particles before and after heating and extrusion.

[0009] Preferably, the feeding assembly further includes a discharge cylinder that is fixed to the bottom of the conical cylinder, and a connecting ring is fixed to the upper end of the conical cylinder. The extrusion assembly further includes a lifting plate disposed above the lifting cylinder. A telescopic rotating assembly for assisting telescopic rotation connection is disposed between the lifting plate and the lifting cylinder. A sealing cylinder for sealing against the inside of the discharge cylinder during descent is fixed to the bottom of the lifting cylinder.

[0010] Preferably, the sealing assembly includes a conical groove formed at the upper end of the conical cylinder, a sealing ring fixed to the outer side of the lifting cylinder, and a conical surface formed at the lower end of the sealing ring for sealing against the conical groove. The conical cylinder, the lifting cylinder, the sealing ring, the conical surface, and the conical groove are concentrically arranged.

[0011] Preferably, the telescopic rotating assembly includes a rotating disk rotatably connected inside the lifting cylinder. Multiple sets of sleeves and slide rods are arranged in a circular array between the rotating disk and the lifting disk, and the slide rods are slidably connected to the sleeves. The ends of the slide rods and sleeves that are far apart from each other are fixed to the rotating disk and the lifting disk, respectively. A first spring is sleeved on the outer side of the sleeve.

[0012] Preferably, the rotating assembly includes a spiral groove formed on the outside of the lifting cylinder, and multiple sets of fixing frames are fixed in a circular array at the bottom of the lifting plate. A transmission pin is fixed on the fixing frame, and one end of the transmission pin is slidably connected to the spiral groove.

[0013] Preferably, multiple sets of the pressurizing components are arranged in a circular array on the conical cover. Each pressurizing component includes an air cylinder fixed to the conical cover. One end of the air cylinder is located outside the conical cover and is open. After the conical cover is lowered, one end of the air cylinder communicates with the inside of the storage chamber. A piston plate is slidably connected inside the air cylinder. Multiple sets of push rods are slidably connected to the other end of the air cylinder. One end of the push rod is fixed to the piston plate, and the other end of the push rod is located inside the conical cover. A pushing component for pushing the push rod is provided on the rotating disk. A second spring for resetting the piston plate after it is pushed is installed inside the air cylinder.

[0014] Preferably, the pushing assembly includes a mounting sleeve fixed to the rotating disk, a mounting rod slidably connected to the mounting sleeve, one end of the mounting rod being fixed to the lifting disk, and a pushing disk being fixed to the other end of the mounting rod. The bottom of the pushing disk is provided with a conical transmission surface for abutting and transmitting power to the end of the push rod.

[0015] Preferably, the lifting assembly includes a threaded tube rotatably connected inside the detection cylinder, a threaded rod threadedly engaged with the threaded tube, one end of the threaded rod being fixed to the lifting plate, a drive motor for driving the threaded tube being installed on the top of the detection cylinder, two sets of sliding cylinders being fixed inside the detection cylinder, the two sets of sliding cylinders being arranged symmetrically about the threaded tube, a telescopic rod being slidably connected to the sliding cylinder, one end of the telescopic rod being fixed to the lifting plate.

[0016] Preferably, the detection and identification component includes a fixing ring fixed inside the detection cylinder, a connecting ring located above the fixing ring, and multiple sets of mounting slots arranged in a circular array at the bottom of the connecting ring. A detection rod is slidably connected to the inner side of the mounting slot. One end of the detection rod is fixed to the fixing ring, and the other end of the detection rod is equipped with a sensor that abuts against the inner side of the mounting slot and is used for weight identification.

[0017] A performance testing process for plastic particle production includes the following steps: S1. After the equipment is started, the lifting plate is raised as a whole through the lifting component. Then, a certain amount of spherical plastic particles are put into the conical cavity through the feed port set at an angle on the outside of the detection cylinder to complete the pre-detection feeding operation. S2. After feeding is completed, the drive motor is started again. The conical cover at the bottom of the lifting cylinder gradually extends into the conical cavity and comes into contact with the spherical plastic particles that are put in, so that the storage cavity forms a completely sealed independent testing space, preventing water vapor from leaking out and outside air from entering during subsequent extrusion, pressurization and drying processes, and providing a sealed environment for accurate testing. S3. During the continuous downward movement of the lifting plate, the transmission enables the adaptive linkage between the vertical downward pressure and circumferential rotation of the conical cover. As the conical cover abuts against the spherical plastic particles, the rotation of the conical cover allows for all-round rotation, kneading, and squeezing of the spherical plastic particles inside the storage chamber. This effectively squeezes out water adhering to the particle surface and free water trapped between particles, breaking the problem of water lock-in due to particle accumulation. This achieves rapid pre-drainage and significantly reduces the subsequent drying pressure. S4. During the process of rotating and extruding the conical cover, the piston plate is pushed to compress part of the cavity space inside the air cylinder through transmission. The open end of the air cylinder is connected to the inside of the storage cavity. The piston plate is pressed and pushes the airflow to uniformly pressurize the inside of the sealed storage cavity, increase the air pressure inside the storage cavity, and accelerate the evaporation and discharge of trace moisture on the surface of the plastic particles and residual water vapor in the gaps. S5. After the closed pressurization and dewatering are completed, the precise moisture content value of the plastic particles is calculated by the detection and identification components and the system algorithm, thus completing the moisture content performance detection and identification. S6. After the test is completed, the control lifting component drives the extrusion component to move upward as a whole, releasing the sealing state of the storage chamber and the particle extrusion state, and making the sealing cylinder no longer block the spherical plastic particles at the bottom. The tested plastic particles are automatically discharged through the discharge cylinder and discharge port.

[0018] Compared with the prior art, the beneficial effects of the present invention are: This invention employs a conical cylinder combined with a conical cover for limiting the structure. By utilizing the characteristics of the conical gap, the spherical plastic particles are automatically and evenly distributed after feeding, eliminating the situation of particles being suspended, bridging, or locally accumulating thickly. This ensures that the stacking state of each batch of particles is consistent and that they are heated evenly, avoiding the problems of local water retention and uneven drying caused by disordered material distribution. This provides a stable pre-testing basis for accurate detection of moisture content. This invention uses a lifting linkage combined with a spiral groove drive to drive a conical cover to rotate, knead, and squeeze the internal particles. This can quickly remove water adhering to the particle surface and free water trapped between particles before drying, replacing the traditional method of relying solely on long-term low-temperature drying to remove water. This significantly shortens the drying time, effectively improves the overall efficiency of the inspection operation, and is suitable for the rapid batch quality inspection needs of the production line. This invention can form a completely sealed storage chamber. With the help of a pressurizing component, the internal chamber is pressurized, which accelerates the evaporation of trace residual water vapor on the surface of the particles. This solves the problems of incomplete water removal, residual moisture, and large deviations in detection data caused by traditional low-temperature drying. It effectively improves the accuracy of particle moisture content detection, and the detection results are more consistent with the actual moisture content of the particles. This invention removes most of the free water in advance through a dual water removal structure of pre-extrusion and pressurization, eliminating the need for long-term low-temperature drying. It can reasonably increase the drying temperature without causing the plastic particles to soften, shrink, melt, or deform due to heat. It also eliminates the measurement error caused by the weight loss of the particles themselves, and completely solves the technical contradiction of high-temperature distortion and low-temperature inefficiency in traditional detection. This invention integrates automatic uniform feeding, closed extrusion, pressurization and dehumidification, constant temperature weighing and detection, and automatic discharge and reset functions. The overall structure has strong linkage, requires no repeated manual intervention, and the detection process is continuous and efficient. It can meet the needs of sampling and full inspection in continuous and large-scale production of plastic particles, and stably ensure the batch production quality of plastic particles and the quality of subsequent injection molding and extrusion molding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the detection cylinder of the present invention; Figure 3 This is a schematic diagram of the internal structure of the detection cylinder of the present invention; Figure 4 This is a schematic diagram of the material feeding assembly and extrusion assembly of the present invention; Figure 5 This is a schematic diagram of the material presentation component and the detection and identification component of the present invention; Figure 6 This is a schematic diagram of the extrusion assembly and lifting assembly of the present invention; Figure 7 This is a schematic diagram of the telescopic rotating component and the rotating component of the present invention; Figure 8 This is a schematic diagram of the pushing component structure of the present invention; Figure 9 This is a schematic diagram of the booster assembly structure of the present invention; Figure 10 This is a schematic diagram of the feeding assembly of the present invention in the state during feeding. Figure 11 This is a schematic diagram of the material feeding assembly of the present invention in the state during material discharge; Figure 12 This is a schematic diagram of the material before extrusion according to the present invention; Figure 13 This is a schematic diagram of the material extrusion process according to the present invention; Figure 14 This is a schematic diagram of the material extrusion and pressurization state of the present invention.

[0020] In the diagram: 101, Detection cylinder; 102, Support platform; 103, Feed inlet; 104, Discharge outlet; 201, Conical cylinder; 202, Discharge cylinder; 203, Conical cavity; 204, Connecting ring; 301, Lifting cylinder; 302, Conical cover; 303, Lifting plate; 304, Sealing cylinder; 401, Conical groove; 402, Sealing ring; 403, Conical surface; 501, Rotating plate; 502, Sleeve; 503, Slide rod; 504, First spring; 601, Screw 602. Rotary groove; 603. Fixed bracket; 701. Transmission pin; 702. Air cylinder; 703. Piston plate; 704. Push rod; 705. Second spring; 801. Mounting sleeve; 802. Mounting rod; 803. Pushing disc; 804. Conical transmission surface; 901. Threaded pipe; 902. Threaded rod; 903. Drive motor; 904. Slide cylinder; 905. Telescopic rod; 1001. Fixed ring; 1002. Mounting groove; 1003. Detection rod; 1004. Sensor. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 Please see Figures 1-14 The figure shows a performance testing device for plastic particle production, including a testing cylinder 101 for testing the moisture content of spherical plastic particles. Multiple sets of support platforms 102 are fixed to the bottom of the testing cylinder 101. Multiple sets of feed ports 103 are installed on the testing cylinder 101, and the feed ports 103 are set in an inwardly inclined state. The bottom of the testing cylinder 101 is connected to a discharge port 104 for discharging the material after testing. It should be noted here that the detection cylinder 101, support platform 102, feed inlet 103 and discharge outlet 104 are conventional components in this application, and their working principle and specific structural composition will not be elaborated here. Also includes: The feeding assembly is located inside the detection cylinder 101 for feeding and placing the spherical plastic particles after they are fed in. The feeding heating assembly includes a conical cylinder 201 located inside the detection cylinder 101, and a constant temperature drying component is provided on the conical cylinder 201. It should be noted here that the constant temperature drying component assists in subsequent heating. In addition, the working principle, structural components and control method of the constant temperature drying component are common technologies in this application and will not be described in detail here. The conical cylinder 201 has a conical cavity 203 for feeding material inside. The detection cylinder 101 is provided with an extrusion assembly for extruding spherical plastic particles inside the conical cavity 203. The extrusion assembly includes a lifting cylinder 301. A conical cover 302 is fixed to the bottom of the lifting cylinder 301. The conical cover 302 is located inside the conical cavity 203 and the cones are matched with each other. A storage cavity for storing spherical plastic particles is formed between the outer side of the conical cover 302 and the inner side of the conical cavity 203. The lifting assembly is used to control the lifting of the extrusion assembly. The extrusion assembly is equipped with a rotating assembly for rotating and extruding after descent and a pressurizing assembly for pressurizing the inside of the storage chamber after descent. A sealing assembly for assisting the sealing of the inside of the storage chamber after descent is provided between the lifting cylinder 301 and the conical cylinder 201. And a detection and identification component disposed inside the detection cylinder 101 for detecting and identifying changes in the moisture content of spherical plastic particles before and after heating and extrusion; It should be noted that the conical cylinder 201 and the conical cover 302 work together to form a sealed material storage chamber, achieving a uniform and regular arrangement of plastic particles. With the lifting and rotating extrusion structure and the chamber pressurization structure, the particles can be rotated, kneaded, and extruded to remove water and pressurized to assist in dehumidification before drying. This quickly removes water adhering to the particle surface and moisture trapped in the gaps, overcoming the shortcomings of traditional testing that relies solely on low-temperature, long-term drying, incomplete water removal, and easy water retention in particles. At the same time, the drying temperature can be reasonably increased to avoid the problems of particle deformation and weight loss and distortion of test data caused by high temperature. This effectively balances the detection accuracy and efficiency of plastic particle moisture content detection, adapts to the needs of large-scale batch quality inspection operations, and ensures the production quality of plastic particles and the quality of subsequent processing and molding.

[0023] Preferably, the feeding assembly further includes a discharge cylinder 202 that is fixed to the bottom of the conical cylinder 201. A connecting ring 204 is fixed to the upper end of the conical cylinder 201. The extrusion assembly further includes a lifting plate 303 disposed above the lifting cylinder 301. A telescopic rotating assembly for assisting telescopic rotation connection is disposed between the lifting plate 303 and the lifting cylinder 301. A sealing cylinder 304 for sealing against the inside of the discharge cylinder 202 during the descent is fixed to the bottom of the lifting cylinder 301. It should be noted here that: when the storage chamber is fully opened, the sealing cylinder 304 is not inside the discharge cylinder 202. In this state, the normal distance between the inner wall of the conical cavity 203 and the outer side of the conical cover 302 is greater than the outer diameter of a single group of spherical plastic particles and less than the outer diameter of two groups of spherical plastic particles. Then, a certain amount of spherical plastic particles are put into the conical cavity 203 through the feed port 103 set at an inclination on the outer side of the detection cylinder 101. During the feeding process, the spherical plastic particles at the bottom abut against the outer side of the sealing cylinder 304. With the conical structure and spacing between the conical cavity 203 and the conical cover 302, the spherical plastic particles are evenly distributed and naturally stacked to form a shape, avoiding the particles from being suspended or bridging, ensuring that the material is evenly distributed, and completing the pre-detection feeding operation.

[0024] Preferably, the sealing assembly includes a conical groove 401 formed at the upper end of the conical cylinder 201, a sealing ring 402 fixed on the outer side of the lifting cylinder 301, and a conical surface 403 formed at the lower end of the sealing ring 402 for sealing against the conical groove 401. The conical cylinder 201, the lifting cylinder 301, the sealing ring 402, the conical surface 403 and the conical groove 401 are concentrically arranged. It should be noted here that after the feeding is completed, the drive motor 903 is restarted again, driving the lifting plate 303 and the lifting cylinder 301 to descend as a whole. This causes the conical cover 302 at the bottom of the lifting cylinder 301 to gradually extend into the conical cavity 203 and come into contact with the spherical plastic particles. At this time, the outer side of the conical cover 302 and the inner side of the conical cavity 203 match and enclose to form a closed storage cavity. During the descent, the sealing ring 402 on the outer side of the lifting cylinder 301 is tightly sealed with the conical groove 401 at the upper end of the conical cylinder 201 through the bottom conical surface 403.

[0025] Preferably, the telescopic rotating assembly includes a rotating disk 501 rotatably connected inside the lifting cylinder 301. The rotating disk 501 and the lifting disk 303 are arranged in a circular array with multiple sets of sleeves 502 and slide rods 503 arranged in a one-to-one correspondence. The slide rods 503 are slidably connected to the sleeves 502. The ends of the slide rods 503 and the sleeves 502 that are far apart from each other are fixed to the rotating disk 501 and the lifting disk 303, respectively. A first spring 504 is sleeved on the outside of the sleeves 502. It should be noted here that the sleeve 502, slide rod 503 and rotating disk 501 assist in the rotatable and telescopic connection between the rotating disk 501 and the lifting cylinder 301, and the first spring 504 facilitates the reset after the telescopic movement.

[0026] Preferably, the rotating assembly includes a spiral groove 601 opened on the outside of the lifting cylinder 301, and multiple sets of fixing brackets 602 are fixed in a circular array at the bottom of the lifting plate 303. A transmission pin 603 is fixed on the fixing bracket 602, and one end of the transmission pin 603 is slidably connected to the spiral groove 601. It should be noted that during the continuous downward movement of the lifting plate 303, the conical cylinder 201 provides mutual restraint to the conical cover 302 and the lifting cylinder 301, and the retractable connection between the lifting plate 303 and the lifting cylinder 301 causes the lifting plate 303 to retract relative to the top of the lifting cylinder 301. During the relative retraction movement, the transmission pin 603 at the bottom of the lifting plate 303 slides along the spiral groove 601 on the outside of the lifting cylinder 301, driving the lifting cylinder 301 and the conical cover 302 to rotate circumferentially.

[0027] Preferably, multiple sets of pressurization components are arranged in a circular array on the conical cover 302. Each pressurization component includes an air cylinder 701 fixed to the conical cover 302. One end of the air cylinder 701 is located outside the conical cover 302 and is open. After the conical cover 302 is lowered, one end of the air cylinder 701 communicates with the interior of the storage chamber. A piston plate 702 is slidably connected inside the air cylinder 701. Multiple sets of push rods 703 are slidably connected to the other end of the air cylinder 701. One end of the push rod 703 is fixed to the piston plate 702, and the other end of the push rod 703 is located outside the conical cover 302. Inside 02, a pushing assembly for pushing the push rod 703 is provided on the rotating disk 501. A second spring 704 for the piston plate 702 to return to its original position after being pushed is installed inside the air cylinder 701. The pushing assembly includes a mounting sleeve 801 fixed on the rotating disk 501. A mounting rod 802 is slidably connected to the mounting sleeve 801. One end of the mounting rod 802 is fixed to the lifting disk 303. The other end of the mounting rod 802 is fixed to the pushing disk 803. A conical transmission surface 804 is provided at the bottom of the pushing disk 803 for abutting and transmitting power to the end of the push rod 703. It should be noted that during the rotation and extrusion process of the conical cover 302, the vertical compression stroke of the telescopic rotating component causes the rotating disk 501 to move closer to the lifting disk 303. During this approach, the sliding connection between the mounting sleeve 801 and the mounting rod 802 causes the pushing disk 803 to move downwards. The conical transmission surface 804 then compresses each set of push rods 703, pushing the piston plate 702 to compress part of the cavity space inside the air cylinder 701. The open end of the air cylinder 701 is connected to the inside of the storage cavity. The piston plate 702 is pressurized and pushes the airflow, uniformly increasing the pressure inside the sealed storage cavity and raising the air pressure inside the storage cavity.

[0028] Preferably, the lifting assembly includes a threaded tube 901 rotatably connected inside the detection cylinder 101, a threaded rod 902 threadedly engaged with the threaded tube 901, one end of the threaded rod 902 being fixed to the lifting plate 303, a drive motor 903 for driving the threaded tube 901 being installed on the top of the detection cylinder 101, two sets of sliding cylinders 904 being fixed inside the detection cylinder 101, the two sets of sliding cylinders 904 being symmetrically arranged about the threaded tube 901, a telescopic rod 905 being slidably connected to the sliding cylinder 904, one end of the telescopic rod 905 being fixed to the lifting plate 303; It should be noted here that: the lifting assembly drives the drive motor 903 to operate, which drives the threaded tube 901 and the threaded rod 902 to mesh and transmit power, controlling the movement of the lifting plate 303. During the movement of the lifting plate 303, the sliding cylinder 904 and the telescopic rod 905 guide the lifting plate 303 after it is subjected to force, so that the lifting plate 303 can be raised and lowered. In addition, the working principle and control method of the drive motor 903 are common drive components, and will not be elaborated on here.

[0029] Preferably, the detection and identification component includes a fixing ring 1001 fixed inside the detection cylinder 101, a connecting ring 204 located above the fixing ring 1001, and multiple sets of mounting grooves 1002 arranged in a ring array at the bottom of the connecting ring 204. A detection rod 1003 is slidably connected to the inner side of the mounting groove 1002. One end of the detection rod 1003 is fixed to the fixing ring 1001, and the other end of the detection rod 1003 is equipped with a sensor 1004 that abuts against the inner side of the mounting groove 1002 and is used for weight identification. It should be noted here that during the testing process, the conical cylinder 201 is pressed onto the upper end of each set of sensors 1004 through the connecting ring 204. The sensors 1004 collect the overall weight data of the plastic particles before and after extrusion and drying in real time, accurately capture the difference in material weight, and calculate the accurate moisture content value of the plastic particles through the system algorithm, thus completing the moisture content performance detection and identification. Furthermore, the sensor 1004, the detection principle, and the system algorithm are conventional technical means in the technical field of this application, and their working principle and operation steps are well-known technologies, so they will not be elaborated on here.

[0030] This solution includes a performance testing process for plastic particle production, comprising the following steps: S1. After the equipment is started, the lifting assembly drives the drive motor 903 to operate, which in turn drives the threaded tube 901 and the threaded rod 902 to mesh and transmit power, controlling the movement of the lifting plate 303. During the movement of the lifting plate 303, the sliding cylinder 904 and the telescopic rod 905 guide the lifting plate 303 under force, causing the lifting plate 303 to move upward as a whole. During the upward movement of the lifting plate 303, the telescopic rotating assembly connects and drives the lifting cylinder 301 and the conical cover 302 upward, fully opening the storage chamber. At this time, the sealing cylinder 304 is not inside the discharge cylinder 202 (see...). Figure 10 In this state, the normal distance between the inner wall of the conical cavity 203 and the outer side of the conical cover 302 is greater than the outer diameter of a single group of spherical plastic particles and less than the outer diameter of two groups of spherical plastic particles. Then, a certain amount of spherical plastic particles are put into the conical cavity 203 through the feed port 103 set at an inclination on the outer side of the detection cylinder 101. During the feeding process, the spherical plastic particles at the bottom abut against the outer side of the sealing cylinder 304. With the conical structure and spacing between the conical cavity 203 and the conical cover 302, the spherical plastic particles are evenly distributed and naturally stacked to form a shape, avoiding the particles from being suspended or bridging, ensuring that the material is evenly distributed, and completing the pre-detection feeding operation. S2. After feeding is completed, the drive motor 903 is restarted, driving the lifting plate 303 and the lifting cylinder 301 to descend as a whole. This causes the conical cover 302 at the bottom of the lifting cylinder 301 to gradually extend into the conical cavity 203 and come into contact with the spherical plastic particles being fed in. At this time, the outer side of the conical cover 302 and the inner side of the conical cavity 203 match and enclose to form a closed storage cavity (see...). Figure 13 During the downward movement, the sealing ring 402 on the outside of the lifting cylinder 301 is tightly sealed to the tapered groove 401 at the upper end of the tapered cylinder 201 through the bottom tapered surface 403. At the same time, the sealing cylinder 304 at the bottom of the lifting cylinder 301 abuts and seals to the inside of the discharge cylinder 202, so that the storage chamber forms a completely sealed independent detection space, preventing water vapor leakage and outside air entry during subsequent extrusion, pressurization and drying processes, and providing a sealed environment for accurate detection. S3. During the continuous descent of the lifting plate 303, the conical cylinder 201 provides mutual restraint to the conical cover 302 and the lifting cylinder 301, and the retractable connection between the lifting plate 303 and the lifting cylinder 301 causes the lifting plate 303 to retract relative to the top of the lifting cylinder 301. During this relative retraction, the transmission pin 603 at the bottom of the lifting plate 303 slides along the spiral groove 601 on the outer side of the lifting cylinder 301, driving the lifting cylinder 301 and the conical cover 302 to rotate circumferentially. Simultaneously, the lifting plate... The sleeve 502 and slide bar 503 between the lowering plate 303 and the rotating plate 501 slide relative to each other. With the extension and buffering effect of the first spring 504, the adaptive linkage between vertical downward pressure and circumferential rotation is realized. Because the conical cover 302 abuts against the spherical plastic particles, and with the rotation of the conical cover 302, the spherical plastic particles inside the storage chamber are rotated, kneaded and squeezed in all directions. This effectively squeezes out the water attached to the particle surface and the free water trapped between the particles, breaks the problem of water lock-in due to particle accumulation, realizes rapid pre-drainage, and greatly reduces the subsequent drying pressure. S4. During the rotational extrusion process of the conical cover 302, relying on the vertical compression stroke of the telescopic rotating assembly, the rotating disk 501 moves closer to the lifting disk 303. During this approach, through the sliding connection between the mounting sleeve 801 and the mounting rod 802, the pushing disk 803 moves downward, using the conical transmission surface 804 to compress each set of push rods 703, pushing the piston plate 702 to compress part of the cavity space inside the air cylinder 701. The open end of the air cylinder 701 is connected to the inside of the storage cavity, and the piston plate 702 is pressurized to push the airflow (see...). Figure 14 (in the state of) uniformly pressurize the inside of the sealed storage chamber, increase the air pressure inside the storage chamber, and accelerate the evaporation and discharge of trace moisture on the surface of the plastic particles and residual water vapor in the gaps; S5. After the closed pressurization and dehydration are completed, the storage chamber is kept sealed. The built-in heating structure of the device performs constant-temperature drying of the plastic particles inside the storage chamber. The drying temperature can be appropriately increased without worrying about particle deformation or distortion. After drying, the extrusion assembly is reset to the state it was in when it was feeding and is then inspected (see...). Figure 10 During the testing process, the conical cylinder 201 is pressed onto the upper end of each set of sensors 1004 through the connecting ring 204. The sensors 1004 collect the overall weight data of the plastic particles before and after extrusion drying in real time, accurately capture the difference in material weight, and calculate the accurate moisture content value of the plastic particles through the system algorithm, thus completing the moisture content performance detection and identification. S6. After the test is completed, control the lifting assembly to drive the extrusion assembly to move upward as a whole, releasing the sealing state of the material storage chamber and the particle extrusion state, and ensuring that the sealing cylinder 304 no longer obstructs the spherical plastic particles at the bottom (see...). Figure 11 (In the state of discharge), the detected plastic particles are automatically discharged through the discharge cylinder 202 and the discharge port 104.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for plastic particle production, comprising: The test cylinder (101) is used to test the moisture content of spherical plastic particles. The bottom of the test cylinder (101) is fixed with multiple sets of support platforms (102). Multiple sets of feed ports (103) are installed on the test cylinder (101), and the feed ports (103) are set in an inwardly inclined state. The bottom of the test cylinder (101) is connected to the discharge port (104) for discharging the material after testing. Its characteristic is that it further includes: A feeding assembly is disposed inside the detection cylinder (101) for feeding and placing spherical plastic particles after feeding. The feeding heating assembly includes a conical cylinder (201) disposed inside the detection cylinder (101). A constant temperature drying component is disposed on the conical cylinder (201). A conical cavity (203) for feeding is opened inside the conical cylinder (201). An extrusion assembly for extruding the spherical plastic particles inside the conical cavity (203) is disposed inside the detection cylinder (101). The extrusion assembly includes a lifting cylinder (301). A conical cover (302) is fixed at the bottom of the lifting cylinder (301). The conical cover (302) is located inside the conical cavity (203), and the cones are matched with each other. A storage cavity for storing spherical plastic particles is formed between the outer side of the conical cover (302) and the inner side of the conical cavity (203). A lifting assembly is used to control the lifting of the extrusion assembly. The extrusion assembly is provided with a rotating assembly for rotating and extruding after descent and a pressurizing assembly for pressurizing the inside of the storage chamber after descent. A sealing assembly for assisting in sealing the inside of the storage chamber after descent is provided between the lifting cylinder (301) and the conical cylinder (201). And a detection and identification component disposed inside the detection cylinder (101) for detecting and identifying changes in the moisture content of spherical plastic particles before and after heating and extrusion.

2. The performance testing device for plastic particle production according to claim 1, characterized in that: The feeding assembly also includes a discharge cylinder (202) that is connected and fixed to the bottom of the conical cylinder (201). A connecting ring (204) is fixed to the upper end of the conical cylinder (201). The extrusion assembly also includes a lifting plate (303) that is disposed above the lifting cylinder (301). A telescopic rotating assembly for assisting telescopic rotation connection is provided between the lifting plate (303) and the lifting cylinder (301). A sealing cylinder (304) is fixed to the bottom of the lifting cylinder (301) for sealing against the inside of the discharge cylinder (202) during descent.

3. The performance testing device for plastic particle production according to claim 2, characterized in that: The sealing assembly includes a conical groove (401) opened at the upper end of the conical cylinder (201), a sealing ring (402) fixed on the outer side of the lifting cylinder (301), and a conical surface (403) for sealing against the conical groove (401) at the lower end of the sealing ring (402). The conical cylinder (201), the lifting cylinder (301), the sealing ring (402), the conical surface (403) and the conical groove (401) are concentrically arranged.

4. The performance testing device for plastic particle production according to claim 2, characterized in that: The telescopic rotating assembly includes a rotating disk (501) rotatably connected inside the lifting cylinder (301). The rotating disk (501) and the lifting disk (303) are arranged in a circular array with multiple sets of sleeves (502) and slide rods (503) arranged in a one-to-one correspondence. The slide rods (503) are slidably connected to the sleeves (502). The ends of the slide rods (503) and the sleeves (502) that are far apart from each other are fixed to the rotating disk (501) and the lifting disk (303) respectively. A first spring (504) is sleeved on the outside of the sleeves (502).

5. The performance testing device for plastic particle production according to claim 4, characterized in that: The rotating assembly includes a spiral groove (601) opened on the outside of the lifting cylinder (301). The bottom of the lifting plate (303) is fixed with multiple sets of fixing frames (602) in a circular array. A transmission pin (603) is fixed on the fixing frame (602), and one end of the transmission pin (603) is slidably connected to the spiral groove (601).

6. The performance testing device for plastic particle production according to claim 5, characterized in that: The pressurization assembly is arranged in a ring array on the conical cover (302). The pressurization assembly includes an air cylinder (701) fixed on the conical cover (302). One end of the air cylinder (701) is located outside the conical cover (302) and is open. After the conical cover (302) is lowered, one end of the air cylinder (701) communicates with the inside of the storage chamber. A piston plate (702) is slidably connected inside the air cylinder (701). Multiple sets of push rods (703) are slidably connected to the other end of the air cylinder (701). One end of the push rod (703) is fixed to the piston plate (702), and the other end of the push rod (703) is located inside the conical cover (302). A push assembly for pushing the push rod (703) is provided on the rotating disk (501). A second spring (704) for the piston plate (702) to reset after being pushed is installed inside the air cylinder (701).

7. The performance testing device for plastic particle production according to claim 6, characterized in that: The pushing assembly includes a mounting sleeve (801) fixed on a rotating disk (501), a mounting rod (802) slidably connected to the mounting sleeve (801), one end of the mounting rod (802) being fixed to a lifting disk (303), and the other end of the mounting rod (802) being fixed to a pushing disk (803). The bottom of the pushing disk (803) is provided with a conical transmission surface (804) for abutting and transmitting power to the end of the push rod (703).

8. The performance testing device for plastic particle production according to claim 2, characterized in that: The lifting assembly includes a threaded tube (901) rotatably connected inside the detection cylinder (101). A threaded rod (902) is threadedly engaged on the threaded tube (901). One end of the threaded rod (902) is fixed to the lifting plate (303). A drive motor (903) for driving the threaded tube (901) is installed on the top of the detection cylinder (101). Two sets of sliding cylinders (904) are fixed inside the detection cylinder (101). The two sets of sliding cylinders (904) are arranged symmetrically about the threaded tube (901). A telescopic rod (905) is slidably connected on the sliding cylinder (904). One end of the telescopic rod (905) is fixed to the lifting plate (303).

9. A performance testing device for plastic particle production according to claim 2, characterized in that: The detection and identification component includes a fixing ring (1001) fixed inside the detection cylinder (101), and a connecting ring (204) located above the fixing ring (1001). The bottom of the connecting ring (204) has multiple sets of mounting slots (1002) arranged in a ring array. A detection rod (1003) is slidably connected to the inner side of the mounting slot (1002). One end of the detection rod (1003) is fixed to the fixing ring (1001), and the other end of the detection rod (1003) is equipped with a sensor (1004) that abuts against the inner side of the mounting slot (1002) and is used for weight identification.

10. A performance testing process for plastic particle production, comprising a performance testing device for plastic particle production as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. After the equipment is started, the lifting plate (303) is raised as a whole through the lifting component. Then, a certain amount of spherical plastic particles are put into the conical cavity (203) through the feed port (103) set at an angle on the outside of the detection cylinder (101) to complete the pre-detection feeding operation. S2. After feeding is completed, the drive motor (903) is started again. The conical cover (302) at the bottom of the lifting cylinder (301) gradually extends into the conical cavity (203) and comes into contact with the spherical plastic particles, so that the storage cavity forms a completely sealed independent detection space, preventing water vapor from leaking out and outside air from entering during subsequent extrusion, pressurization and drying processes, and providing a sealed environment for accurate detection. S3. During the continuous downward movement of the lifting plate (303), the transmission enables the vertical downward pressing and circumferential rotation of the conical cover (302). As the conical cover (302) comes into contact with the spherical plastic particles, the rotation of the conical cover (302) allows for all-round rotation, kneading and squeezing of the spherical plastic particles inside the storage chamber. This effectively squeezes out water adhering to the particle surface and free water trapped between particles, breaking the problem of water lock-in due to particle accumulation, achieving rapid pre-drainage, and significantly reducing subsequent drying pressure. S4. During the rotation and extrusion process of the conical cover (302), the piston plate (702) is pushed to compress part of the cavity space inside the air cylinder (701) through transmission. The open end of the air cylinder (701) is connected to the inside of the storage cavity. The piston plate (702) is pushed by pressure to uniformly increase the pressure inside the sealed storage cavity, increase the air pressure inside the storage cavity, and accelerate the evaporation and discharge of trace moisture on the surface of the plastic particles and residual water vapor in the gaps. S5. After the closed pressurization and dewatering are completed, the precise moisture content value of the plastic particles is calculated by the detection and identification components and the system algorithm, thus completing the moisture content performance detection and identification. S6. After the test is completed, the control lifting component drives the extrusion component to move upward as a whole, releases the sealing state of the storage chamber and the particle extrusion state, and makes the sealing cylinder (304) no longer block the spherical plastic particles at the bottom. The tested plastic particles are automatically discharged through the discharge cylinder (202) and the discharge port (104).

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