Full-automatic melt index instrument

Abstract

The invention discloses a full-automatic melt index instrument which comprises a working table top arranged on a fixed base and provided with a multi-axis robot; the melt index instrument main body is provided with a charging barrel, a hole film detachably arranged at the bottom of the charging barrel and a piston rod capable of moving up and down in the charging barrel; the automatic feeding module is movably arranged above the charging barrel; the automatic waste cutting and collecting module is arranged below the hole film; the piston rod automatic cleaning module is used for receiving the piston rod after the experiment and performing multi-stage wiping and scrubbing; the automatic hole film taking, placing and cleaning module is used for automatically disassembling and assembling the hole film and cleaning the surface and the side wall of the hole film; and the control system is electrically connected with the modules and the multi-axis robot. According to the full-automatic melt index instrument, automation of the whole process from feeding to cleaning can be achieved, so that the testing efficiency, the result consistency and the equipment intelligence level are improved.

Description

Technical Field

[0001] This application relates to the field of laboratory automation equipment technology, and more specifically, to a fully automatic fusion indexer. Background Technology

[0002] Melt flow index (MFR / MVR) is an important parameter for measuring the melt flowability of thermoplastics under specific conditions, and it is widely used in plastics production, processing, and quality control. Currently, the testing process of melt flow indexers on the market is highly dependent on manual operation, and the steps are cumbersome, mainly including: manually weighing and adding materials, manually placing the piston rod and weights, manually cutting and collecting the flowing waste material after the experiment, and manually removing and cleaning the piston rod and the diaphragm (or orifice membrane), etc.

[0003] The existing technology suffers from the following major drawbacks: 1. Low efficiency and poor consistency: Manual operation involves numerous steps and is time-consuming. Inconsistent techniques among different operators, or even the same operator performing different operations, lead to poor repeatability of test results and significant human error. 2. Insufficient material adaptability: Manual feeding is difficult for viscous materials, easily agglomerated granular materials, or easily airborne powdery materials, easily causing uneven feeding, splashing, or clogging, affecting test accuracy. 3. Low automation and lack of complete solutions: Existing technologies lack integrated and automated solutions for the entire melt flow index testing process (feeding, waste disposal, piston rod cleaning, membrane loading and cleaning). In particular, the automatic loading and cleaning of the membrane, and reliable automated feeding for various material states (viscous fluids, granules, powders), remain technical challenges in the industry. 4. Cumbersome cleaning and maintenance: Residual melt (especially materials that harden after cooling) on ​​the piston rod and membrane is difficult to clean. Manual wiping or brushing is inefficient and carries the risk of incomplete cleaning, affecting subsequent tests.

[0004] Therefore, there is an urgent need for a fully automated melt indexer that can automate the entire process from feeding to cleaning and can stably handle materials in various physical states, so as to improve testing efficiency, result consistency and equipment intelligence. Summary of the Invention

[0005] The main objective of this application is to provide a fully automatic melt flow indexer that can automate the entire process from feeding to cleaning and can stably handle materials in various physical states, thereby improving testing efficiency, result consistency, and equipment intelligence.

[0006] To achieve the above objectives, the first aspect of this application proposes a fully automatic melt indexing device, comprising: a worktable mounted on a fixed foundation, on which a multi-axis robot is mounted for transferring the required execution components between various workstations; and, mounted on the worktable: a melt indexing device body having a material cylinder, a perforated membrane detachably disposed at the bottom of the material cylinder, and a piston rod capable of moving up and down within the material cylinder; an automatic feeding module movably disposed above the material cylinder for quantitatively feeding material into the material cylinder and initially compacting the material; an automatic waste shearing and collection module disposed below the perforated membrane for automatically shearing material during the experiment; an automatic piston rod cleaning module for receiving the piston rod after the experiment and performing multi-stage wiping and brushing; an automatic perforated membrane loading and unloading and cleaning module for automatically disassembling and assembling the perforated membrane and cleaning its surface and sidewalls; and a control system electrically connected to the above modules and the multi-axis robot for coordinating the actions of each module to achieve fully automated operation of the melt indexing test process.

[0007] Furthermore, the automatic feeding module includes: a multi-point drive mechanism, comprising a lifting drive mechanism, a rotary drive device, and a translation drive mechanism. The fixed end of the translation drive mechanism is mounted on the main body of the melt indexer device, the fixed end of the lifting drive mechanism is mounted on the moving end of the translation drive mechanism, and the fixed end of the rotary drive device is mounted on the moving end of the lifting drive mechanism; a composite funnel, mounted on the moving end of the lifting drive mechanism to achieve vertical lifting; a composite rod, connected to the rotary drive device and located inside the composite funnel, the rotary drive device being used to drive the composite rod to rotate and stir; and a sealing component, sleeved on the composite rod and moving synchronously with the composite rod in the vertical direction, the sealing component being used to seal or open the discharge port of the composite funnel under the command of the control system.

[0008] Furthermore, the multi-point drive mechanism also includes a material-push drive mechanism, which is located between the lifting drive mechanism and the rotary drive device. The material-push drive mechanism is used to drive the composite rod to perform up-and-down reciprocating motion.

[0009] Furthermore, the automatic feeding module also includes a funnel cover and a funnel cover lifting device for driving the funnel cover to rise and fall vertically. The funnel cover lifting device is located on the moving end of the lifting drive mechanism. The funnel cover is equipped with an air blowing mechanism, which is used to blow away wall-mounted dust after feeding is completed.

[0010] Furthermore, the piston rod automatic cleaning module includes: a cloth supply mechanism, including a lifting platform for stacking cleaning cloths and a photoelectric switch for detecting the height of the top layer of cloth; and a needle suction cup, located on the end gripper of the multi-axis robot, the needle suction cup having retractable fine needles for gripping the cleaning cloths on the lifting platform by piercing and combining negative pressure.

[0011] Furthermore, the piston rod automatic cleaning module also includes an elastic clamping and wiping mechanism, which includes two half-tubes joined together and having outer peripheral grooves. A spring is embedded in the outer peripheral groove to provide radial preload, so that the two half-tubes generate an elastic clamping force on the piston rod that enters them.

[0012] Furthermore, the piston rod automatic cleaning module also includes a wire brush mechanism, which consists of at least two opposing wire brush plates with adjustable spacing, used to perform a secondary brushing of the piston rod after wiping.

[0013] Furthermore, the automatic perforated membrane pick-up and cleaning module includes: a pick-up device, which includes a movable ejector mechanism with an elastic buffer structure, the ejector mechanism being used to insert into the center hole of the perforated membrane to position and support the perforated membrane; an ejection device, which includes a movable ejection component, the ejection component being configured to press down from above the perforated membrane and cooperate with the ejector mechanism to remove the perforated membrane from the barrel; a cleaning device, which is disposed on the moving path of the pick-up device, for cleaning the surface and circumference of the removed perforated membrane; and a drive control device, which is connected to the pick-up device, the ejection device and the cleaning device respectively, for driving the pick-up device to transfer the perforated membrane between the barrel and the cleaning device, and controlling the coordinated operation of each device.

[0014] Furthermore, the ejector mechanism includes: a rotary table driven by a drive source to achieve horizontal rotation; a pressure block on which an ejector is fixedly mounted; a connector on which the pressure block is slidably mounted on the rotary table; an elastic member sleeved on the connector, with both ends of the elastic member elastically abutting between the pressure block and the rotary table; and a lifting device mounted on the rotary table for driving the lifting of the pressure block.

[0015] Furthermore, the cleaning device also includes: an upper surface cleaning unit, which includes a cleaning tool driven by a drive device to reciprocate, the cleaning tool being used to clean residues on the upper surface of the membrane; and a peripheral surface cleaning unit, which includes a pair of symmetrically arranged rotating wire brushes; wherein each rotating wire brush is connected to a drive device and is mounted on an opening and closing gripper so that the rotating wire brush contacts the cylindrical peripheral surface of the membrane through the closing of the gripper.

[0016] The technical solutions provided by the embodiments of this application may include the following beneficial effects: In this application, the integrated design of a multi-axis robot and various functional modules automates the entire process of melt flow index testing, from material feeding and testing to cleaning, reducing manual intervention and improving testing efficiency. Each module has a clear division of labor and works collaboratively to ensure the accuracy and stability of the testing process. Simultaneously, an automated cleaning module ensures the cleanliness of all equipment components, providing a reliable guarantee for the accuracy of subsequent tests. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the structure of the fully automatic melt indexer provided in this application; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point I of the fully automatic melt indexer. Figure 3 for Figure 1 The diagram shows an enlarged view of the structure at point II of the fully automatic melt indexer. Figure 4 for Figure 1 The diagram shows a top view of the fully automated melt indexer. Figure 5 for Figure 1 The diagram shows the main structure of the fully automatic melt indexer, including the structure of the automatic feeding module; Figure 6 for Figure 5 The diagram shows the main structure of the melt indexer device, including the structure of the automatic feeding module. Figure 7 for Figure 6 The schematic diagram of the main body of the melt indexer device along the AA direction is shown; Figure 8 for Figure 6 The schematic diagram of the main body of the melt indexer device along the BB direction is shown. Figure 9 for Figure 6 The schematic diagram of the main body of the melt indexer device along the CC direction is shown. Figure 10 for Figure 1 The diagram shows the structure of the fabric supply mechanism of the fully automatic melt indexer, where the needle suction cup is not shown. Figure 11 for Figure 1 The diagram shows the fabric supply mechanism of a fully automatic melt indexer, which includes a needle-punching suction cup. Figure 12 for Figure 11 The diagram shows the structure of the needle suction cup of the fabric supply mechanism. Figure 13 for Figure 1 The diagram shows the structure of the automatic piston rod cleaning module of the fully automatic melt indexer. Figure 14 for Figure 13The diagram shown is a rear view of the piston rod automatic cleaning module. Figure 15 for Figure 14 The diagram shows the structure of the piston rod automatic cleaning module along DD. Figure 16 for Figure 14 The diagram shows a top view of the automatic piston rod cleaning module. Figure 17 for Figure 16 The diagram shows the structure of the automatic piston rod cleaning module along the EE direction. Figure 18 for Figure 1 The front view of the fully automatic melt indexer is shown, which also illustrates the structural schematic of the automatic membrane loading and cleaning module. Figure 19 for Figure 18 The diagram shown is a structural schematic of the automatic membrane pick-up and cleaning module. Figure 20 for Figure 1 The diagram shows a cross-sectional view of the fully automated melt indexer along the center line of the membrane. Figure 21 for Figure 18 The diagram shows a three-dimensional structural schematic of the automatic membrane pick-up and cleaning module. Figure 22 for Figure 18 The diagram shows the disassembly of the automatic membrane pick-up and cleaning module connected to the membrane. Figure 23 for Figure 18 A schematic diagram of the positioning unit of the automatic membrane pick-up and cleaning module shown; Figure 24 for Figure 23 A partially enlarged schematic diagram of position unit III of the automatic membrane pick-up and cleaning module shown. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linked," and "socketing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Figures 1 to 4 The structure of a fully automatic fuse indexer 100 according to an embodiment of the present invention is shown. Figures 1 to 4As shown, the fully automatic melt indexer 100 includes: a worktable 101 mounted on a fixed base, on which a multi-axis robot 102 is mounted for transferring the required execution components between workstations; and a melt indexer device body 200 mounted on the worktable 101, which has a material cylinder 201, a perforated membrane 300 detachably disposed at the bottom of the material cylinder 201, and a piston rod 202 that can move up and down within the material cylinder 201; and an automatic feeding module 1 movably disposed above the material cylinder 201. 1. A module for quantitatively feeding material into the barrel 201 and initially compacting the material; 2. An automatic waste shearing and collection module, located below the membrane 300, for automatically shearing material during the experiment; 3. An automatic piston rod cleaning module, for receiving the piston rod 202 after the experiment and performing multi-stage wiping and brushing; 4. An automatic membrane picking, placing and cleaning module, for automatically disassembling and assembling the membrane 300 and cleaning its surface and sidewalls; 5. A control system, electrically connected to the above modules and the multi-axis robot 102, for coordinating the actions of each module to achieve fully automated operation of the melt index test.

[0024] In practical use, the fully automatic melt indexer 100 according to an embodiment of the present invention initiates the test program through the control system, and the multi-axis robot 102 automatically transfers the execution components (such as piston rod 202, pressure rod, etc.) between various workstations. The automatic feeding module 1 quantitatively feeds material into the material cylinder 201 and initially compacts it. Subsequently, the melt indexer device body 200 is tested, and the waste material automatic shearing and collection module 2 completes the shearing during the experiment. After the experiment, the piston rod automatic cleaning module 3 performs multi-stage wiping and brushing on the piston rod 202, and the membrane automatic loading and cleaning module 4 completes the disassembly, assembly, and cleaning of the membrane 300. All modules work together to achieve fully automated operation of the entire process.

[0025] Through the above-described configuration, the integrated design of the multi-axis robot 102 and its functional modules achieves full automation of the melt flow index (WFII) test process, from material feeding and testing to cleaning, reducing manual intervention and improving testing efficiency. Each module has a clear division of labor and works collaboratively to ensure the accuracy and stability of the testing process. Simultaneously, the automated cleaning module ensures the cleanliness of all equipment components, providing a reliable guarantee for the accuracy of subsequent tests.

[0026] Please refer to Figure 2 , Figures 5 to 9Furthermore, the automatic feeding module 1 may include: a multi-point drive mechanism, which includes a lifting drive mechanism 11, a rotary drive device 12, and a translation drive mechanism 13. The fixed end of the translation drive mechanism 13 is disposed on the melt indexer device body 200, the fixed end of the lifting drive mechanism 11 is disposed on the moving end of the translation drive mechanism 13, and the fixed end of the rotary drive device 12 is disposed on the moving end of the lifting drive mechanism 11; a composite funnel 14, which is disposed on the moving end of the lifting drive mechanism 11 to achieve vertical lifting; a composite rod 15, which is connected to the rotary drive device 12 and disposed inside the composite funnel 14. The rotary drive device 12 is used to drive the composite rod 15 to rotate and stir; and a sealing component 16, which is sleeved on the composite rod 15 and moves synchronously with the composite rod 15 in the vertical direction. The sealing component 16 is used to seal or open the discharge port of the composite funnel 14 under the command of the control system.

[0027] In this application, the core component of the automatic feeding module 1 is a composite funnel 14. The composite funnel 14 is mounted on the upper frame (equipped with the melt indexer body) via a lifting cylinder and a rotary motor (or rotary cylinder) in sequence, enabling horizontal rotation and vertical lifting. Inside the composite funnel 14 is a composite rod 15, which is driven to rotate by a stirring motor and to reciprocate up and down by a material-push cylinder. A sealing component 16 (also called a plug) is fitted on the composite rod 15, and the plug can move up and down with the rod.

[0028] In this application, the structure of the composite rod 15, at least the portion located inside the funnel, forms a bent structure or a spiral structure.

[0029] Please refer to Figures 5 to 6 Furthermore, the multi-point drive mechanism also includes a material-push drive mechanism 17, which is disposed between the lifting drive mechanism 11 and the rotary drive device 12. The material-push drive mechanism 17 is used to drive the composite rod 15 to perform up-and-down reciprocating motion.

[0030] In practical use, pre-weighed materials are added to the composite funnel 14 by a robot or manually. The lifting cylinder drives the funnel to descend and align with the feeding port of the material cylinder 201. The rotary drive device 12 (stirring motor) drives the composite rod 15 to rotate and stir, cooperating with the material-pumping drive mechanism 17 (pumping cylinder) to achieve the first feeding. After the sealing component 16 (also called the plug) descends to seal the discharge port, the funnel rotates and moves out. The robot grabs the material-pumping rod to initially compact the material in the material cylinder 201. Subsequently, the funnel is reset for the second feeding, and finally, the robot drives the material-pumping rod to complete the material compaction.

[0031] Through the above settings, the multi-point drive mechanism achieves precise funnel alignment and multi-station switching. The combination of rotary stirring and reciprocating churning of the composite rod 15 prevents material agglomeration and blockage. The dual-feeding design, combined with the robotic compaction process, ensures uniform and dense material filling. The sealing fit between the plug and the discharge port enables precise control of the feeding amount, improving overall feeding efficiency and material filling quality, and providing a preliminary guarantee for the accuracy of melt flow index test results.

[0032] Please refer to Figure 5 Furthermore, the automatic feeding module 1 also includes a funnel cover 18 and a funnel cover lifting device 19 for driving the funnel cover 18 to rise and fall vertically. The funnel cover lifting device 19 is located on the moving end of the lifting drive mechanism 11. The funnel cover 18 is provided with an air blowing mechanism 181, which is used to blow away wall-mounted dust after feeding is completed.

[0033] In this application, the funnel cover 18 adopts a circular cover plate structure, and the edge may be provided with an annular silicone sealing ring to form a sealing fit with the funnel opening. The funnel cover lifting device 19 may be composed of a guide shaft, a linear bearing, and a miniature cylinder, and the cylinder piston rod is connected to the funnel cover 18 through a floating joint. The air blowing mechanism 181 may include two nozzles arranged opposite each other, with the nozzle outlet pointing towards the inner wall of the funnel, and the air source interface is connected to an external clean air source through a quick-connect connector. In specific use, when the automatic feeding module 1 moves above the material cylinder 201, the lifting device drives the funnel cover 18 to descend, and the sealing ring fits against the funnel opening to form a closed space. After the quantitative feeding is completed, the air blowing mechanism 181 is opened, and clean airflow is sprayed onto the inner wall of the funnel through the inclined nozzle. The airflow flows along the inner wall of the funnel and is discharged from the funnel outlet to remove residual dust.

[0034] Through the above-described design, the annular silicone sealing ring achieves a seal during the mixing and feeding process, preventing dust from spilling out and polluting the environment. The coordinated design of the tilting nozzle and the lifting action ensures that the airflow evenly covers the inner wall of the funnel, improving the efficiency of wall-mounted dust removal.

[0035] Please continue to refer to Figure 5 Furthermore, the melt flow indexer device body 200 is also provided with a weight placement area 142 for weights 141. The weights 141 are placed above the placement area 142, which is moved vertically by a lifting device. During the material flowability test, the piston rod 202 continuously compacts the material in the material cylinder 201. At the same time, the placement area 142 descends by the lifting device, causing the weights 141 to continuously press against the top of the piston rod 202 (the bottom groove of the weights 141 can continuously cooperate with the top of the piston rod 202), so as to maintain the continuous pressure of the weights 141 on the piston rod 202, allowing the melt flow indexer device body 200 to perform continuous testing.

[0036] Please return Figure 3 Furthermore, the automatic waste shearing and collection module 2 may include a shear cylinder 21. Specifically, a shear cylinder 21 is installed below the melt indexer barrel 201, directly opposite the perforated membrane 300. The shear cylinder 21 is mounted on a swing arm 23 driven by a rotary cylinder 22. During the experiment, the rotary cylinder 22 rotates the shear cylinder 21 into the working position. When the melt flows out of the perforated membrane 300 to a predetermined length, the control system triggers the shear cylinder 21 to shear the material strip. The sheared waste falls into the waste collection bin directly below. During experimental breaks, the rotary cylinder 22 rotates the shear cylinder 21 out of the working position to avoid interfering with other operations.

[0037] With the above configuration, the double-acting shear cylinder 21, combined with high-hardness blades, ensures a smooth cut surface for the material strip without any stringing. The combination of the L-shaped swing arm 23 and the rotary cylinder 22 enables rapid switching between the working and standby positions of the shearing mechanism, reducing space occupation during non-working periods and thus improving the overall automation and operational safety of the melt indexer experiment.

[0038] Please refer to Figures 10 to 12 Furthermore, the piston rod automatic cleaning module 3 may include: a cloth supply mechanism 31, including a lifting platform 311 for stacking cleaning cloths and a photoelectric switch 312 for detecting the height of the uppermost cloth surface; and a needle suction cup 313, which is disposed on the end gripper of the multi-axis robot 102. The needle suction cup 313 has retractable fine needles for gripping the cleaning cloths on the lifting platform 311 by piercing and combining negative pressure.

[0039] In practical use, the fabric supply mechanism 31 according to the embodiment of the present invention places the fabric to be supplied on the fabric tray of the lifting platform 311 in a stacked manner. After the control system is started, the position detection device monitors the height of the top layer of fabric in real time and outputs a detection signal. The control system drives the linear drive device to lift the fabric tray according to the signal, so that the top layer of fabric is always maintained at the preset fabric supply height, so that the external suction device can perform the fabric picking operation.

[0040] Based on the above setup, on the one hand, the mechanism achieves dynamic adjustment of the fabric height through real-time linkage between the position detection device and the control system, ensuring that the top layer of fabric is always in the optimal working position of the external suction device, effectively avoiding fabric retrieval failure or multi-layer grasping problems caused by changes in fabric stacking height. On the other hand, its modular design not only improves the automation level of the fabric feeding process but also enhances its adaptability to different external suction devices, making it widely applicable to various automated production scenarios and significantly improving fabric feeding efficiency and operational stability.

[0041] Furthermore, the photoelectric switch 312 is selected as either a through-beam photoelectric switch or a reflective photoelectric switch.

[0042] When used in this application, the through-beam photoelectric switch 312 determines the height of the fabric by the beam blocking state between the transmitting and receiving ends, and triggers a detection signal when the fabric rises and blocks the beam; the reflective photoelectric switch 312 detects the height by receiving the change in the intensity of the beam reflected from the surface of the fabric, without the need for opposing installations.

[0043] With the above configuration, the through-beam photoelectric switch 312 features strong anti-interference capability and high detection accuracy, making it suitable for complex lighting environments; the reflective photoelectric switch 312 is easy to install, has a compact structure, and can be flexibly adapted to different installation spaces. The two selection options can be flexibly switched according to actual working conditions, ensuring stable output of detection signals under various fabric materials and environmental conditions, providing reliable assurance for the precise control of the automatic fabric feeding mechanism.

[0044] Please refer to Figure 12 Furthermore, the needle suction cup 313 device may also be provided with an air blowing structure 314, which is used to blow air toward the edge of the fabric.

[0045] In this application, the air blowing structure 314 may consist of an air source interface, a distribution pipe, and several strip-shaped air blowing holes. The distribution pipe is distributed in a ring along the edge of the needle-punched suction cup 313 device, and the air blowing holes are opened on the side of the distribution pipe facing the edge of the fabric, with the openings tilted downwards at a set angle to the horizontal plane. In actual use, when the needle-punched suction cup 313 device moves to a preset position above the fabric, the air source supplies air to the distribution pipe through the interface. The airflow forms a directional airflow through the air blowing holes and blows towards the edge of the fabric, creating a separation gap at the edge of the stacked fabric. Subsequently, the needle-punching component extends to complete the gripping action.

[0046] With the above settings, the directional inclined airflow can effectively break the adsorption force and static friction between fabrics, and help to achieve precise separation of single fabric sheets; the ring-shaped air hole design ensures that the fabric edges are subjected to uniform force, avoiding fabric displacement caused by excessive local air blowing; the coordinated action with the needle punching component can significantly reduce the risk of multiple layers of fabric being picked up at the same time, and improve the continuity and stability of automatic fabric feeding.

[0047] Furthermore, the height of the detection surface is lower than the optimal suction height of the needle suction cup 313 device, and there is a fixed theoretical height difference between the two.

[0048] With the above settings, the design of the detection surface being lower than the optimal suction height can prevent the risk of equipment collision caused by excessive fabric rise. Through precise control of the height difference, the needle suction cup 313 device always performs the gripping action within the preset optimal working range, effectively improving the safety and stability of the mechanism operation.

[0049] Furthermore, the control system is pre-configured with a compensation height parameter to offset the response delay of the mechanism system. The control system is configured to record the first height position corresponding to the linear drive device when it receives the state change signal from the photoelectric sensor, and control the linear drive device to drive the fabric tray to continue to rise a distance corresponding to the compensation height parameter before stopping.

[0050] Through the above settings, the compensation height parameter can effectively offset the system delay caused by factors such as signal transmission and mechanical response, ensuring that the final stopping position of the fabric tray accurately matches the optimal suction height of the needle suction cup 313 device. The pre-configured parametric design allows the compensation logic to be deeply adapted to the characteristics of the mechanism, avoiding height deviation problems caused by delay, thereby improving the positioning accuracy and action consistency of the automatic fabric feeding mechanism, and ensuring the stability and reliability of the gripping action during continuous operation.

[0051] Furthermore, the value of the compensation height parameter is less than the value of the theoretical height difference.

[0052] In this application, the design of the numerical relationship between the compensation height parameter and the theoretical height difference not only ensures the effectiveness of the system delay compensation, but also reserves a safety margin for the height adjustment of the fabric tray, thereby avoiding the fabric from exceeding the optimal pick-up height due to excessive compensation, and further improving the accuracy and reliability of the automatic fabric feeding process.

[0053] Furthermore, the control system is also configured to control the linear drive device to drive the fabric tray down to a reset position after a single fabric picking action is completed and before the next height detection action begins. In this reset position, the upper surface of the top cleaning cloth is lower than the detection surface of the photoelectric sensor.

[0054] In practical use of this embodiment, after a single fabric picking action is completed, the control system automatically triggers a reset process, and drives the fabric tray to descend to the preset reset position through a linear drive device, ensuring that the surface of the top layer of fabric is lower than the detection surface of the photoelectric sensor, thus providing an initial reference for the next height detection action.

[0055] By setting the reset position as described above, the impact of fabric stacking height changes after the previous fabric retrieval on detection accuracy can be eliminated, ensuring that each height detection starts from a unified benchmark and avoiding detection errors caused by initial position deviations. Simultaneously, the design of the fabric surface being lower than the detection surface allows for a complete travel distance for subsequent fabric rise detection, ensuring that the photoelectric sensor can accurately capture the initial state of fabric height changes and improving the consistency and reliability of height detection in continuous operations.

[0056] Please refer to Figures 13 to 17Furthermore, the piston rod automatic cleaning module 3 may also include an elastic clamping and wiping mechanism 32. The elastic clamping and wiping mechanism 32 includes two half-tubes 321 that are joined together and have an outer peripheral groove 3211. A spring 3212 is embedded in the outer peripheral groove 3211 to provide radial preload inward, so that the two half-tubes 321 generate an elastic clamping force on the piston rod 202 that enters therein.

[0057] In this application, the elastic clamping tube wiping mechanism 32 can be formed by the joining of two tube halves with outer peripheral grooves 3211. A circular spring 3212 is embedded in the outer peripheral groove 3211, causing the tube halves to elastically clamp the piston rod 202. The mechanism has a bottom-supporting cylinder at its bottom, used to close and press the two tube halves 321 together during wiping. In specific use, the robot clamps the piston rod 202 with residual molten material, and inserts a cleaning cloth, pre-placed above the inner cavity of the tube halves of the elastic clamping tube wiping mechanism 32, into the inner cavity of the tube. The bottom-supporting cylinder drives the bottom-supporting cylinder to seal the opening at the bottom of the tube, and the two tube halves 321 elastically clamp the piston rod 202 under the action of the circular spring 3212. The robot controls the piston rod 202 to rotate and reciprocate up and down within the tube, achieving peripheral wiping through the cooperation of the cleaning cloth and the tube. For the lower surface of piston rod 202, the robot presses down on piston rod 202 so that its end face is pressed against the bottom support, and completes the end face cleaning by rotating. After wiping, the bottom support cylinder drives the bottom support to open the bottom opening, and the robot moves piston rod 202 out of the tube.

[0058] Through the above settings, the radial pre-tightening design of the elastic clamp tube ensures that the cleaning cloth fits tightly against the outer periphery of the piston rod 202, improving the removal effect of residual melt; the sealing and opening functions of the bottom cylinder achieve the sealing of the wiping process and the convenience of waste collection, avoiding the spillage of contaminants; the combination of robot-driven rotation and up-and-down movement achieves all-round cleaning of the outer periphery and end face of the piston rod 202, and with the soft cleaning cloth material, it can effectively remove dirt while preventing scratches on the surface of the piston rod 202, ensuring the sealing accuracy of the piston rod 202 and the barrel 201 in subsequent experiments.

[0059] Please refer to Figures 13 to 15 Furthermore, the piston rod automatic cleaning module 3 may also include a wire brush mechanism 33, which consists of at least two wire brush plates 331 arranged opposite each other with adjustable spacing, for secondary brushing of the piston rod 202 after wiping.

[0060] In this application, the wire brush mechanism 33 consists of two fixed brush plates densely covered with soft, fine steel wires, with adjustable spacing. After wiping, the piston rod 202 is held by a robot and inserted between the two brush plates. The robot performs a secondary brushing through rotation and up-and-down movement to remove the hardened material. The brushed-off waste falls into the lower material cylinder 201.

[0061] Through the above setup, the two opposing soft fine steel wire brush plates 331 with adjustable spacing enable adaptive cleaning of piston rods 202 of different diameters. Combined with the robot's rotation and up-and-down movement, this ensures full contact between the wire brushes and the piston rod 202 surface, effectively removing any hardened material residue after wiping. The soft fine steel wire material ensures cleaning effectiveness while avoiding scratches on the piston rod 202 surface. The brushed waste falls directly into the lower material cylinder 201, integrating cleaning and collection, improving the cleaning efficiency and cleanliness of the piston rod 202, and ensuring smooth movement of the piston rod 202 and accurate test data in subsequent experiments.

[0062] Please refer to Figures 18 to 24 Furthermore, the automatic membrane pick-up and cleaning module 4 may include: a pick-up device 41, which includes a movable ejector mechanism 411 with an elastic buffer structure, the ejector mechanism 411 being inserted into the center hole of the membrane 300 to position and support the membrane 300; an ejection device 42, which includes a movable ejection component configured to press down from above the membrane 300 and cooperate with the ejector mechanism 411 to remove the membrane 300 from the barrel 201; a cleaning device 43, which is disposed on the moving path of the pick-up device 41 and is used to clean the surface and circumference of the removed membrane 300; and a drive control device, which is connected to the pick-up device 41, the ejection device 42 and the cleaning device 43 respectively, for driving the pick-up device 41 to transfer the membrane 300 between the barrel 201 and the cleaning device 43, and controlling the coordinated operation of each device.

[0063] In practical use, the membrane 300 pick-up, placement, and cleaning module according to an embodiment of the present invention, after receiving a start signal, controls the pick-up device 41 to move below the material cylinder 201 at the melt indexer station. The ejector pin mechanism 411 rises and inserts into the center hole of the membrane 300 to achieve positioning and support. Subsequently, the ejector component of the ejector device 42 is inserted from above the material cylinder 201 and presses down on the membrane 300, working in conjunction with the ejector pin mechanism 411 to remove the membrane 300 from the material cylinder 201. The pick-up device 41 carries the membrane 300 along a preset path to the cleaning device 43, which cleans the surface and circumference of the membrane 300. After cleaning, the pick-up device 41 transfers the membrane 300 back to the material cylinder 201 for installation or designated storage, and all devices reset to await the next cycle.

[0064] Through the above-described configuration, the membrane 300 pick-up and cleaning module of this embodiment of the invention, through the synergistic effect of the elastic buffer structure of the ejector mechanism 411 and the ejector device 42, can achieve non-destructive disassembly and stable clamping of the membrane 300, thereby avoiding deformation or contamination of the membrane 300 caused by manual operation. The cleaning device 43 is integrated along the transfer path, shortening the transfer distance of the membrane 300 and reducing waiting time, thus improving overall work efficiency. The drive control device provides centralized and coordinated control of each device, ensuring the automated and continuous execution of the pick-up and cleaning processes, reducing the cost of manual intervention, and ensuring the consistency and stability of the cleaning quality of the membrane 300 through standardized operating procedures.

[0065] Please refer to Figure 21 and Figure 22 Furthermore, the ejector mechanism 411 may include: a rotary table 4111, which is driven by a drive source to achieve horizontal rotation; a pressure block 4112, on which an ejector is fixedly mounted; a connecting member 4113, on which the pressure block 4112 is slidably mounted on the rotary table 4111; an elastic member 4114, which is sleeved on the connecting member 4113, with both ends of the elastic member 4114 elastically abutting between the pressure block 4112 and the rotary table 4111; and a lifting device 4115, which is mounted on the rotary table 4111 and used to drive the lifting of the pressure block 4112.

[0066] In this application, the rotary table 4111 can adopt a hollow flange structure, and its bottom can be connected to a servo motor via a harmonic reducer. The pressure block 4112 can be a rectangular metal plate, and the rotary table 4111 can be provided with a guide sleeve that slides in cooperation with the connecting member 4113. The connecting member 4113 can be a guide rod structure. The elastic component 4114 can be a cylindrical helical compression spring 3212, and the wire diameter and free length of the spring 3212 are matched with a preset buffer stroke. The lifting device 4115 can be composed of a stepper motor and a limiting block set at the drive end of the stepper motor. The limiting block abuts against the top of the pressure block 4112 and cooperates with the elastic component 4114. When the pick-and-place device 41 receives the transfer command, the lifting device 4115 drives the limiting block to rise, and the pressure block 4112 drives the ejector pin to rise under the action of the elastic component 4114. The ejector pin inserts into the center hole of the perforated membrane 300 to achieve flexible support for the perforated membrane 300. The rotary table 4111 drives the membrane 300 to rotate at any angle from 0 to 360° according to the cleaning process requirements, so as to achieve the cleaning work.

[0067] With the above configuration, the elastic buffer system composed of the guide rod structure and the compression spring 3212 can adapt to the thickness deviation and downward pressure stiffness of the pore membrane 300, thereby avoiding damage to the pore membrane 300 caused by rigid contact.

[0068] Please refer to Figure 22Furthermore, it may also include a locking device 44 for locking the perforated membrane 300 onto the barrel 201. In the membrane loading state, the ejector mechanism 411 pushes the perforated membrane 300 into the mounting slot (not shown in the figure) of the barrel 201, and the locking device 44 extends into the mounting slot under the drive of the drive device to lock the perforated membrane 300. Conversely, it is used when removing the membrane.

[0069] In this application, the locking device 44 includes a locking part (e.g., a positioning pin or a locking pin) that matches the mounting slot. The drive cylinder extends and retracts along the radial direction of the material cylinder 201 by driving the locking part to abut or disengage from the outer wall of the perforated membrane 300. During membrane loading, after the ejector mechanism 411 pushes the perforated membrane 300 into the mounting slot of the material cylinder 201, the drive control device triggers the locking device 44 to operate. The drive cylinder pushes the locking part into the slot, and the locking part forms a mechanical engagement with the outer peripheral wall of the perforated membrane 300. During disassembly, the drive cylinder pulls the locking part out of the slot, releasing the locking state.

[0070] Through the above-described mechanical interlocking locking design, a rigid connection between the perforated membrane 300 and the barrel 201 can be achieved, preventing displacement of the perforated membrane 300 due to vibration or pressure during the melt flow index test. Furthermore, the locking device 44 is compatible with perforated membrane 300 specifications of different thicknesses, and the locking part design ensures that the locking process does not damage the edges of the perforated membrane 300, improving membrane loading stability and repeatability accuracy.

[0071] Please refer to Figure 23 and Figure 24 Furthermore, the cleaning device 43 may include a positioning unit 45, which is driven by a drive device to press the perforated membrane 300 on the ejector mechanism 411 to a preset height before the cleaning operation.

[0072] In this application, the positioning unit 45 can be a positioning rod driven by a servo drive module. An elastic buffer pad can be embedded at the bottom of the positioning rod. The servo drive module controls the positioning rod to move vertically through a ball screw pair. When the pick-and-place device 41 transfers the perforated membrane 300 to the cleaning station, the drive control device triggers the positioning unit 45 to move. The servo drive module pushes the positioning rod downward, and the perforated membrane 300 is pressed to a preset cleaning height by the elastic buffer pad before resetting.

[0073] Through the above settings, the positioning method combining servo drive and elastic buffer achieves precise control of the cleaning height of the pore membrane 300, avoiding cleaning blind spots or cleaning obstacles caused by the position of the pore membrane 300, significantly improving the adhesion accuracy between the cleaning tool and the surface of the pore membrane 300, and ensuring the consistency of the cleaning effect.

[0074] Please return Figure 21 and Figure 24Furthermore, the cleaning device 43 may also include: an upper surface cleaning unit 46, which includes a cleaning tool driven by a driving device to reciprocate, the cleaning tool being used to clean residues on the upper surface of the pore membrane 300; and a peripheral surface cleaning unit 47, which includes a pair of symmetrically arranged rotating wire brushes; wherein each rotating wire brush is connected to a driving device and is mounted on an opening and closing gripper so that the rotating wire brush contacts the cylindrical peripheral surface of the pore membrane 300 through the closing of the gripper.

[0075] In this application, the upper surface cleaning unit 46 can be composed of a linear slide module, a replaceable cleaning head, and a position sensor. The cleaning head adopts a modular design and can be adapted to different cleaning tools such as scrapers or wire brushes. The linear slide is driven by a servo motor to achieve horizontal reciprocating motion, with a stroke covering the diameter range of the upper surface of the membrane 300. After the membrane 300 is pressed to a preset height by the positioning unit 45, the drive control device starts the upper surface cleaning unit 46. The servo motor drives the cleaning head to reciprocate at a uniform speed along the radial direction of the membrane 300, removing residues through contact friction between the cleaning head and the surface of the membrane 300. After cleaning, the cleaning head returns to its initial position, waiting for the next cleaning instruction.

[0076] With the above-described configuration, the modular cleaning head design allows for rapid switching of cleaning tools based on residue characteristics, enhancing cleaning adaptability. Servo-driven reciprocating motion, combined with closed-loop control via a position sensor, ensures the cleaning trajectory covers the entire surface of the membrane 300 without any blind spots. Simultaneously, by adjusting the motion speed and pressure parameters, damage to the membrane 300 surface is avoided while efficiently removing residue, ensuring the structural integrity of the membrane 300 after cleaning.

[0077] Furthermore, cleaning tools can be scrapers or wire brushes.

[0078] In this application, a scraper or wire brush is used as the cleaning tool, which can achieve differentiated cleaning for different types of residues: the scraper is suitable for removing blocky or sticky residues adhering to the surface of the membrane 300, achieving efficient scraping through planar contact; the wire brush is suitable for cleaning fine particles or fibrous residues, utilizing the elastic deformation of the bristles to penetrate deep into the pores of the membrane 300 surface. The switchable design of the two cleaning tools can adapt to the cleaning needs of the membrane 300 in different usage scenarios, ensuring thorough removal of residues while avoiding excessive wear on the surface of the membrane 300 caused by a single cleaning method, thus improving the adaptability of cleaning operations and the reusability of the membrane 300.

[0079] Furthermore, the positioning unit 45 can be a positioning rod made of polytetrafluoroethylene, which is driven by a cylinder to achieve reciprocating lifting and lowering.

[0080] In this application, the positioning rod made of polytetrafluoroethylene can effectively prevent adhesion or scratching to the surface of the porous membrane 300, ensuring the integrity of the porous membrane 300 during the positioning process.

[0081] In this application, the peripheral cleaning unit 47 consists of symmetrically configured dual-axis drive components. Each rotating wire brush is independently connected to a servo motor as a rotation drive source. The brush body is made of wear-resistant steel wire bundles arranged in a spiral shape. The opening and closing grippers achieve synchronous centering movement through a pneumatic slide. The gripper stroke can be adjusted by a limit sensor to accommodate membranes 300 of different diameters. After the membrane 300 has completed the cleaning of its upper surface, the drive control device commands the opening and closing grippers to drive the rotating wire brushes to move closer synchronously. When the brush body contacts the cylindrical peripheral surface of the membrane 300, the servo motor drives the wire brush to rotate at high speed, while the grippers maintain a constant clamping force. The membrane 300 rotates slowly with the positioning unit 45 to achieve full-angle cleaning of the peripheral surface. After the cleaning cycle is completed, the grippers open and reset.

[0082] Through the above configuration, the symmetrical dual-brush design, combined with the rotation of the 300-perforated membrane, achieves thorough cleaning of the circumferential surface without any blind spots. The spiral steel wire bundle structure enhances the ability to remove residue from even the smallest crevices. The independent servo drive and pneumatic gripper pressure feedback system work together to automatically adjust the clamping force according to the diameter of the 300-perforated membrane, preventing deformation of the membrane or excessive wear of the bristles due to overpressure, significantly improving the uniformity of circumferential cleaning and extending the equipment's lifespan.

[0083] Furthermore, the control system can use a PLC as the main controller, integrating a robot controller, motor drivers, cylinder solenoid valve assemblies, and various sensors (such as photoelectric switches 312, position sensors, etc.) for collaborative operation. The control system pre-stores a complete test process program, automatically scheduling the robot and coordinating the sequential actions of each module according to instructions, achieving a fully closed-loop automated operation from "empty material cylinder 201 - automatic feeding - placing piston rod 202 and weight 141 - starting test - automatic material cutting - experiment end - residual material discharge - cleaning piston rod 202 - removing and placing clean die - preparing for next test". Furthermore, the experimental process and parameters can be set and edited via a host computer. Experimental data is saved, viewed, and exported for use.

[0084] Through the above settings, the PLC main controller and multi-module collaborative architecture achieve fully automated scheduling. Closed-loop control through pre-stored process programs and real-time sensor feedback eliminates human error and improves the consistency and reliability of test results. The upper computer parameter configuration function supports flexible process adjustment, and the data storage and export function facilitates experimental traceability and analysis, meeting diverse testing needs. The double-repetitive operation design for inner wall cleaning, combined with precise robot control, ensures thorough removal of residual materials in the 201 material cylinder, avoiding cross-contamination. At the same time, the unified collection of cleaning cloth waste reduces manual intervention, improving overall equipment operating efficiency and the cleanliness of the experimental environment.

[0085] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0086] Obviously, those skilled in the art should understand that the various units or steps of this application described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device, or fabricating them separately as individual integrated circuit modules, or fabricating multiple modules or steps into a single integrated circuit module. Thus, this application is not limited to any particular combination of hardware and software.

[0087] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fully automatic melt indexing instrument, characterized in that, include: A worktable, mounted on a fixed foundation, on which a multi-axis robot is mounted for transferring required execution components between workstations; and, mounted on the worktable, the following: The main body of the melt indexer device includes a barrel, a perforated membrane detachably disposed at the bottom of the barrel, and a piston rod that can move up and down inside the barrel; An automatic feeding module is movably disposed above the material cylinder. The automatic feeding module is used to quantitatively feed material into the material cylinder and perform preliminary compaction of the material. An automatic waste shearing and collection module is located below the porous membrane and is used to automatically shear the waste during the experiment. The piston rod automatic cleaning module is used to receive the piston rod after the experiment and perform multi-stage wiping and brushing. The automatic membrane loading and cleaning module is used to automatically disassemble and assemble the membrane and clean its surface and sidewalls; The control system, which is electrically connected to the above modules and the multi-axis robot, is used to coordinate the actions of each module to achieve fully automated operation of the melt index test.

2. The fully automatic fuse indexer according to claim 1, characterized in that, The automatic feeding module includes: A multi-point drive mechanism includes a lifting drive mechanism, a rotary drive device, and a translation drive mechanism. The fixed end of the translation drive mechanism is disposed on the main body of the melt indexer device, the fixed end of the lifting drive mechanism is disposed on the moving end of the translation drive mechanism, and the fixed end of the rotary drive device is disposed on the moving end of the lifting drive mechanism. A composite funnel is disposed on the moving end of the lifting drive mechanism to achieve vertical lifting; A composite rod, which is connected to the rotary drive device and is disposed inside the composite funnel, wherein the rotary drive device is used to drive the composite rod to rotate and stir. A sealing component is sleeved on the composite rod and moves synchronously with the composite rod in the vertical direction. The sealing component is used to seal or open the discharge port of the composite funnel under the command of the control system.

3. The fully automatic melt indexing instrument according to claim 2, characterized in that, The multi-point drive mechanism also includes a material-push drive mechanism, which is disposed between the lifting drive mechanism and the rotary drive device. The material-push drive mechanism is used to drive the composite rod to perform up-and-down reciprocating motion.

4. The fully automatic melt indexing machine according to claim 2, characterized in that, The automatic feeding module also includes a funnel cover and a funnel cover lifting device for driving the funnel cover to move vertically up and down. The funnel cover lifting device is located on the moving end of the lifting drive mechanism. The funnel cover is provided with an air blowing mechanism, which is used to blow away wall-mounted dust after feeding is completed.

5. The fully automatic melt indexing instrument according to claim 1, characterized in that, The piston rod automatic cleaning module includes: The cloth supply mechanism includes a lifting platform for stacking cleaning cloths and a photoelectric switch for detecting the height of the top layer of cloth. A needle-piercing suction cup is mounted on the end gripper of the multi-axis robot. The needle-piercing suction cup has retractable fine needles for gripping the cleaning cloth on the lifting platform by piercing and combining negative pressure.

6. The fully automatic melt indexing machine according to claim 5, characterized in that, The piston rod automatic cleaning module also includes an elastic clamping tube wiping mechanism, which comprises two half-tubes joined together and having an outer peripheral groove. A spring is embedded in the outer peripheral groove to provide radial preload, so that the two half-tubes generate an elastic clamping force on the piston rod that enters therein.

7. The fully automatic melt indexing machine according to claim 6, characterized in that, The piston rod automatic cleaning module also includes a wire brush mechanism, which consists of at least two opposing wire brush plates with adjustable spacing, used to perform a secondary brushing of the piston rod after wiping.

8. The fully automatic melt indexing instrument according to claim 1, characterized in that, The automatic membrane pick-up and cleaning module includes: The pick-and-place device includes a movable pin mechanism with an elastic buffer structure, the pin mechanism being inserted into the center hole of the porous membrane to position and support the porous membrane; An ejection device includes a movable ejection member configured to press down from above the perforated membrane and cooperate with the ejector pin mechanism to remove the perforated membrane from the barrel; A cleaning device is provided on the moving path of the picking and placing device for cleaning the surface and circumference of the picked-up membrane. A drive control device is connected to the pick-and-place device, the ejection device, and the cleaning device, respectively, for driving the pick-and-place device to transfer the perforated membrane between the material cylinder and the cleaning device, and controlling the coordinated operation of each device.

9. The fully automatic melt indexing instrument according to claim 8, characterized in that, The ejector pin mechanism includes: A rotary table, which is driven by a drive source to achieve horizontal rotation; A pressure block, on which a ejector pin is fixedly installed; A connector, wherein the pressure block is slidably mounted on the rotating platform via the connector; An elastic member, sleeved on the connector, wherein both ends of the elastic member elastically abut against the pressure block and the rotating table; and A lifting device, which is installed on the rotating platform, is used to drive the lifting and lowering of the pressure block.

10. The fully automatic melt indexing instrument according to claim 8, characterized in that, The cleaning device also includes: The upper surface cleaning unit includes a cleaning tool that is driven to reciprocate by a driving device, the cleaning tool being used to clean residues on the upper surface of the pore membrane; A peripheral cleaning unit includes a pair of symmetrically arranged rotating wire brushes; each of the rotating wire brushes is connected to a driving device, and the rotating wire brushes are mounted on opening and closing jaws so that the rotating wire brushes contact the cylindrical peripheral surface of the perforated membrane through the closing of the jaws.

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