A sample preparation device

Abstract

The utility model relates to the field of sample preparation equipment and discloses a sample preparation device, which comprises a rack, a sample preparation part and a motion mechanism, the rack is used for bearing the material to be cut, the sample preparation part comprises a cutting knife for cutting the material and a measuring probe for measuring the thickness of the material, the motion mechanism is installed on the rack, the cutting knife and the measuring probe are both connected with the motion mechanism, the motion mechanism comprises a rotating part and a lifting part connected with the rotating part, the rotating part is used for driving the sample preparation part to rotate in a horizontal plane through the lifting part, and the lifting part is used for driving the sample preparation part to ascend and descend along the thickness direction of the material. By integrating the cutting knife and the measuring probe on the same sample preparation device and driving them by the motion mechanism, the integration of the cutting and measuring functions is realized, the number of equipment components and the operation steps are reduced, the sample preparation efficiency is improved, and the error caused by human intervention is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of sample preparation equipment technology, and specifically relates to a sample preparation device. Background Technology

[0002] In the field of packaging material development, the water vapor transmission rate test based on the cup method is commonly used to evaluate the moisture-proof performance of materials. This test requires the material to be prepared into a sample that matches the specific moisture-permeable cup sample placement area (usually circular), ensuring a tight fit with the cup rim for testing. Current water vapor transmission testing equipment is highly automated, capable of parallel testing of multiple samples, automatic weighing, data acquisition, calculation, and result output through computer program control, significantly improving the efficiency and reliability of the testing process. If the material's own water vapor transmission coefficient is required, the precise thickness data of the sample must also be obtained during the measurement process.

[0003] However, the aforementioned advantages of automation are only reflected in the testing process itself. The crucial sample preparation (front-end sample preparation) process still heavily relies on tedious manual operations: testers need to manually draw the shape and size lines of the sample according to the specifications of the permeation cup, cut it using tools such as scissors, and manually measure the thickness of each sample with a micrometer when necessary. This manual sample preparation method is significantly inefficient, time-consuming, and labor-intensive, making it a bottleneck in the overall testing process. At the same time, the accuracy and consistency of sample dimensions and the accuracy of thickness measurements are easily affected by the operator's skill level and patience, leading to potential instability in test results and additional labor costs, which seriously restricts further improvement in overall testing efficiency. Utility Model Content

[0004] In view of at least one of the above-mentioned defects or deficiencies in the prior art, the present invention provides a sample preparation device that realizes mechanized sample cutting and measurement, thereby improving the efficiency and accuracy of sample preparation.

[0005] To achieve the above objectives, this utility model provides a sample preparation device, which includes: The frame is used to hold the material to be cut. Sample preparation, including a cutting blade for cutting materials and a measuring probe for measuring the thickness of materials; A motion mechanism is installed on the frame. The cutting blade and the measuring probe are both connected to the motion mechanism. The motion mechanism includes a rotating component and a lifting component connected to the rotating component. The rotating component is used to drive the sample to rotate in the horizontal plane through the lifting component. The lifting component is used to drive the sample to move up and down along the thickness direction of the material.

[0006] In some embodiments, the motion mechanism further includes a connecting column connected to the rotating member, the lifting member connected to the connecting column, the sample preparation member connected to the lifting member, and the rotating member used to drive the connecting column to rotate so that the sample preparation member rotates in a horizontal plane.

[0007] In some embodiments, there are two motion mechanisms, with the cutting blade and the measuring probe respectively connected to the two motion mechanisms.

[0008] In some embodiments, the lifting component connected to the cutting blade is a cylinder, and the lifting component connected to the measuring probe is a hydraulic rod.

[0009] In some embodiments, the cutting blade is detachably connected to the lifting member via a quick-release assembly.

[0010] In some embodiments, the quick-release assembly includes: An upper threaded post, with external threads, is located at the bottom of the lifting component; A threaded post with external threads is located at the top of the cutting tool; The sleeve is provided with internal threads that mate with the upper threaded post and the lower threaded post.

[0011] In some embodiments, the frame includes a support column and a base, the support column being connected to the base, the base being used to support the material to be cut.

[0012] In some embodiments, the frame further includes a pad for supporting the material, and the base is provided with a limiting ring with a limiting groove for accommodating and limiting the pad, and the limiting groove is provided with an opening for the pad to pass through.

[0013] In some embodiments, a signal receiver is detachably mounted on the pad, the signal receiver being used in conjunction with the measuring probe to measure the thickness of the material.

[0014] In some embodiments, the sample maker further includes a controller, the motion mechanism being electrically connected to the controller and used to start and stop the lifting component and the rotating component.

[0015] By integrating the cutting blade and measuring probe onto the same sample maker and driving it with a motion mechanism, the cutting and measuring functions are integrated, reducing the number of equipment parts and operating steps, thereby improving sample preparation efficiency and reducing errors caused by human intervention. The rotating component in the motion mechanism drives the sample maker to rotate in the horizontal plane via a lifting component, facilitating flexible selection of the material cutting position. The lifting component directly drives the sample maker to precisely rise and fall along the material thickness direction, ensuring the accuracy of the cutting depth and the measured thickness. Furthermore, the frame provides stable support for the material, and the coordinated motion of rotation and lifting allows the sample preparation process to adapt to changes in material thickness and diverse cutting needs, enhancing the equipment's versatility and reliability.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a structural diagram of the sample preparation device of this utility model; Figure 2 This is a front view of the sample preparation device in this utility model; Figure 3 This is a structural diagram of the motion mechanism connected to the cutting blade in the sample preparation device of this utility model; Figure 4 This is a schematic diagram showing the connection between the cylinder and the cutting blade in the sample preparation device of this utility model; Figure 5 This is a structural diagram of the motion mechanism connected to the measuring probe in the sample preparation device of this utility model; Figure 6 This is a structural diagram of the base and support components in the sample preparation device of this utility model; Explanation of reference numerals in the attached figures Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0020] like Figure 1 and Figure 2 As shown, this utility model provides a sample preparation device, including a frame 100, a sample preparation component 200, and a motion mechanism 300. The frame 100 is used to carry the material to be cut. The sample preparation component 200 includes a cutting blade 210 for cutting the material and a measuring probe 220 for measuring the thickness of the material. The motion mechanism 300 is mounted on the frame 100. The cutting blade 210 and the measuring probe 220 are both connected to the motion mechanism 300. The motion mechanism 300 includes a rotating component 310 and a lifting component 320 connected to the rotating component 310. The rotating component 310 is used to drive the sample preparation component 200 to rotate in the horizontal plane through the lifting component 320. The lifting component 320 is used to drive the sample preparation component 200 to move up and down along the thickness direction of the material. By integrating the cutting blade 210 and the measuring probe 220 onto the same sample maker and driving them via the motion mechanism 300, the cutting and measuring functions are integrated, reducing the number of equipment parts and operating steps, thereby improving sample preparation efficiency and reducing errors caused by human intervention. Specifically, the rotating component 310 in the motion mechanism 300 drives the sample maker 200 to rotate in the horizontal plane via the lifting component 320, facilitating flexible selection of the material cutting position. The lifting component 320 directly drives the sample maker 200 to precisely rise and fall along the material thickness direction, ensuring the accuracy of the cutting depth and the measured thickness. Furthermore, the frame 100 provides stable support for the material. Combined with the coordinated movement of rotation and lifting, the sample preparation process adapts to changes in material thickness and diverse cutting requirements, enhancing the equipment's versatility and reliability. Overall, this structural design simplifies the overall device, optimizes the spatial layout, and enhances its automation potential.

[0021] In some embodiments, the motion mechanism 300 further includes a connecting column 330 connected to the rotating member 310, a lifting member 320 connected to the connecting column 330, and a sample 200 connected to the lifting member 320. The rotating member 310 drives the connecting column 330 to rotate, thereby enabling the sample 200 to rotate in the horizontal plane. The rotating member 310 drives the connecting column 330 to rotate, and the sample 200 is connected to the connecting column 330 via the lifting member 320, thereby achieving horizontal rotation of the sample 200. This design makes the rotational torque transmission path more direct and has high coaxiality, effectively suppressing the sway of the sample 200 during rotation and ensuring accurate positioning of the cutting blade 210 and the measuring probe 220. At the same time, the lifting member 320 is directly connected to the connecting column 330, enabling the sample 200 to move vertically, thereby achieving both horizontal rotation and vertical lifting of the sample 200.

[0022] In some embodiments, there are two motion mechanisms 300, with the cutting blade 210 and the measuring probe 220 respectively connected to the two motion mechanisms 300. The cutting blade 210 and the measuring probe 220 are each connected to two independent motion mechanisms 300, so that their rotational motion in the horizontal direction and their lifting motion in the vertical direction do not interfere with each other. For different working conditions of the measuring probe 220 and the cutting blade 210, the independent motion mechanism 300 can be adapted to different motion parameters. For example, the measuring probe 220 can use low-speed slow descent to avoid collision, or the cutting blade 210 can need high-speed stamping, avoiding performance compromise caused by functional coupling between the two. Moreover, if any component jams or is damaged, only its corresponding motion mechanism 300 is affected, and the other function can still operate normally. Maintenance does not require complete disassembly, which significantly improves the reliability and maintainability of the equipment.

[0023] In some embodiments, the lifting component 320 connected to the cutting blade 210 is a cylinder 321, which can drive the cutting blade 210 to perform stamping cutting. The lifting component 320 connected to the measuring probe 220 is a hydraulic rod 322, which drives the measuring probe 220 to descend slowly to prevent collision. The connecting post 330 includes a first connecting post 331 and a second connecting post 332, such as... Figure 3As shown, the connecting column 330 included in the motion mechanism 300 connected to the cutting blade 210 is a first connecting column 331. The first connecting column 331 is vertically arranged, with one end connected to the output shaft of the rotating member 310, and the other end connected to the frame 100 via a rotating seat 340. The rotating member 310 drives the first connecting column 331 to rotate via its output shaft. Specifically, the rotating member 310 can be a motor, with its output shaft connected to the upper end of the first connecting column 331, and the lower end of the first connecting column 331 connected to the frame 100 via the rotating seat 340. The motor's output shaft can rotate forward and backward, thus driving the first connecting column 331 to rotate forward and backward. The cylinder 321 is vertically positioned, and its piston rod 321b can extend and retract vertically within the cylinder body 321a. The cylinder body 321a is connected to the first connecting post 331 via a connecting assembly 350. The connecting assembly 350 includes a connecting rod 351 and clamps 352 connected to both ends of the connecting rod 351. One end of the connecting rod 351 is connected to the first connecting post 331 via the clamps 352, and the other end is connected to the cylinder body 321a via the clamps 352. The connecting rod 351 is perpendicular to both the cylinder 321 and the first connecting post 331, ensuring that the cylinder 321 and the cutting blade 210 are also vertically positioned. The lower end of the cylinder 321 is connected to the cutting blade 210 via the piston rod 321b. The piston rod 321b drives the cutting blade 210 to move vertically up and down for cutting. The rotating component 310 and the frame 100 are connected at both ends of the first connecting column 331 to form a rotation reference axis system, ensuring the coaxial stability of the lifting component 320 during rotation and preventing horizontal sway of the cutting blade 210. Simultaneously, the cylinder 321 is connected parallel to the first connecting column 331 via a connecting rod 351, ensuring that the lifting motion operates strictly in the vertical direction. The overall structure ensures high precision and rigidity in the cutting action while also featuring modular maintainability of key components, significantly improving the long-term stability and ease of use of the equipment.

[0024] In some embodiments, the cutting blade 210 is detachably connected to the quick-release assembly 500 and the lifting member 320. The size and shape of the cutting blade 210 can be set according to the sample size required by the water vapor transmission tester. When different sizes and shapes of samples are required, different cutting blades 210 need to be replaced. The cutting blade 210 can also be replaced when it is worn. Therefore, the detachable connection design between the lifting member 320 and the cutting blade 210 enables quick replacement or maintenance of the cutting blade 210.

[0025] In some implementations, such as Figure 4As shown, the quick-release assembly 500 includes: an upper threaded post 510 with external threads located at the bottom of the lifting member 320, a lower threaded post 520 with external threads located at the top of the cutting blade 210, and a sleeve 530. The sleeve 530 has internal threads that engage with the upper threaded post 510 and the lower threaded post 520. The length of the sleeve 530 is greater than the lengths of the upper threaded post 510 and the lower threaded post 520, respectively. To ensure effective connection between the sleeve 530 and the lower threaded post 520, a limiting flange is provided at the upper end of the upper threaded post 510. This flange limits the excessive upward rotation of the sleeve 530 and prevents it from exceeding the upper threaded post 510 and losing the space to engage with the lower threaded post 520. The internal thread of the sleeve 530 simultaneously engages the upper threaded post 510 of the lifting component 320 and the lower threaded post 520 of the cutting blade 210, forming a detachable connection between the cutting blade 210 and the lifting component 320. When replacing the cutting blade 210, simply unscrewing the sleeve 530 is sufficient to separate the components, making the process convenient and quick. This detachable connection design between the lifting component 320 and the cutting blade 210 allows for rapid replacement or maintenance of the cutting blade 210. Furthermore, the disassembly and assembly process does not require the complete disassembly of the moving mechanism 300; only the connection at the bottom of the lifting component 320 needs to be disconnected, significantly improving maintenance efficiency and reducing downtime.

[0026] In some implementations, such as Figure 5 As shown, the connecting column 330 included in the motion mechanism 300 connected to the measuring probe 220 is the second connecting column 332; the hydraulic rod 322 has a fixed part 322a and a lifting part 322b that can be raised and lowered. One end of the second connecting column 332 is connected to the motor, and the other end is connected to the lifting part 322b. The fixed part 322a is connected to the frame 100 through the rotating seat 340. That is, the second connecting column 332 and the hydraulic rod 322 are connected in the same vertical direction. In this way, the motor can drive the second connecting column 332 and the hydraulic rod 322 to rotate coaxially through the output shaft. The measuring probe 220 is set vertically downward and connected to the lifting part 322b through the connecting assembly 350. The lifting part 322b can drive the measuring probe 220 to move up and down in the vertical direction. One end of the connecting rod 351 is connected to the lifting unit 322b via a clamp 352, and the other end is connected to the measuring probe 220 via a clamp 352. The connecting rod 351 is vertically connected to the hydraulic rod 322 and the measuring probe 220, so that the measuring probe 220 is also set vertically. This ensures that the lifting unit 322b can drive the measuring probe 220 to always move up and down strictly in the vertical direction, avoiding the deviation of the contact angle between the probe and the material caused by the swing or tilt of the rotating mechanism, which would result in measurement errors.

[0027] In some implementations, such as Figure 6As shown, the frame 100 includes a support column 110 and a base 120. The support column 110 is connected to the base 120, which is used to support the material to be cut. The base 120 serves as the overall support base, directly bearing the weight of the material and the impact force of the cutting. The support column 110 is vertically connected to the edge of the base 120 to form a closed frame structure. The base 120 can be square, rectangular, or circular; this invention does not impose specific limitations. The support column 110 is located on the central axis of the base 120 in the length direction and at the edge in the width direction, leaving an area on the base 120 for placing materials. At the same time, the connecting columns 330 of the two motion mechanisms 300 are both connected to the base 120 and symmetrically arranged on both sides of the support column 110, which can ensure the stability of the overall structure of the sample maker.

[0028] In some embodiments, the frame 100 further includes a material-bearing pad 130. A limiting ring 122 with a limiting groove 121 is provided on the base 120. The limiting groove 121 accommodates and limits the pad 130, and has an opening for the pad 130 to pass through. The groove wall of the limiting groove 121 forms a physical constraint on the pad 130, preventing it from shifting when subjected to cutting impact. The lateral opening design of the limiting groove 121 allows for "horizontal pull-out" disassembly and assembly of the pad 130, enabling the replacement of dedicated pads 130 of different materials and thicknesses without disassembling the limiting ring 122 or adjusting the frame 100 structure, making it convenient and quick. The pad 130 is made of a material that is not easy to cut and has repairable cuts, such as PVC. The high hardness and elasticity of PVC allow it to resist the cutting penetration caused by the downward pressure of the cutting blade 210. Only shallow indentations are formed on the surface instead of a through cut, avoiding direct contact between the blade and the base 120 and preventing damage to the blade or the base 120.

[0029] In some embodiments, a signal receiver 131 is detachably mounted on the pad 130. The signal receiver 131 is used to cooperate with the measuring probe 220 to measure the thickness of the material. When measurement is required, the sample to be measured is placed on the signal receiver 131, the measuring probe 220 is rotated horizontally to above the signal receiver 131, and then lowered by the hydraulic pull rod 322 until the measuring probe 220, the sample to be measured, and the signal receiver 131 are in contact and connected, and the thickness of the sample can be measured. The signal receiver 131 can be circular, and the shape of the signal receiver 131 is smaller than the shape of the cutting blade 210. Specifically, if the cutting blade 210 is circular, the diameter of the signal receiver 131 is smaller than the diameter of the cutting blade 210; if the cutting blade 210 is rectangular, the diameter of the signal receiver 131 is smaller than the minimum side length of the cutting blade 210, which can effectively avoid damage to the signal receiver 131 by the blade of the cutting blade 210.

[0030] In some embodiments, the sample preparation device further includes a controller 400, with the motion mechanism 300 electrically connected to the controller 400 and used to start and stop the lifting component 320 and the rotating component 310. The controller 400 is connected above the support column 110 and to the rotating component 310 of the motion mechanism 300. The controller 400 also has a control panel 410, which has buttons such as a pre-sample preparation button, a sample preparation button, a measurement button, a reset button, and a sample preparation end button. The controller 400 can be controlled by existing PLC programmable logic, or by existing microcontrollers, or it can be made as a standalone controller 400, or it can be integrated into a water vapor transmission rate tester. This utility model does not impose specific limitations.

[0031] When sample preparation is required, place the sample on the pad 130, click the "Preparation Sample Preparation" button on the control panel 410, and the motor of the motion mechanism 300 will rotate, driving the first connecting column 331 to rotate forward, which in turn drives the cylinder 321 and the cutting blade 210 to rotate. When the center point of the cutting blade 210 aligns with the center of the predetermined cutting position on the pad 130, the rotation stops. Then, click the "Sample Preparation" button on the control panel 410 again. The piston rod 321b of the cylinder 321 will drive the cutting blade 210 downward to cut, completing the cutting of one sample. Then, the piston rod 321b of the cylinder 321 will drive the cutting blade 210 upward to reset. To prepare multiple samples, repeat the process of placing the sample and clicking the "Sample Preparation" button. After the sample preparation is complete, press the "End Sample Preparation" button to finish. The motor will rotate in the opposite direction, driving the first connecting column 331 to reverse and return the cylinder 321 and the cutting blade 210 to their initial positions. The sample preparation and measurement functions cannot be performed simultaneously; they can be used sequentially as needed.

[0032] When the thickness of the sample needs to be measured, the sample is placed on the signal receiver 131 on the pad 130. The measurement button is pressed, and the motor of the motion mechanism 300 drives the second connecting column 332 and the hydraulic rod 322 to rotate until the measuring probe 220 on the hydraulic rod 322 is perpendicular to the center of the signal receiver 131 on the pad 130. The rotation stops, and the measuring probe 220 is moved downwards by the lifting part 322b of the hydraulic rod 322 until the measuring probe 220, the sample, and the signal receiver 131 are in contact and connected. At this point, the sample thickness is measured and the measured value is displayed on the controller 400 panel. After the sample thickness measurement is completed, the reset button on the control panel 410 is pressed. The hydraulic rod 322 drives the measuring probe 220 upwards, and the motor rotates, causing the second connecting column 332 and the hydraulic rod 322 to rotate back to their initial positions.

[0033] This invention integrates the cutting blade 210 and the measuring probe 220 onto the same sample maker, driven by the motion mechanism 300. This achieves integrated cutting and measurement functions, reducing the number of equipment parts and operating steps, thereby improving sample preparation efficiency and reducing errors caused by human intervention. The rotating component 310 in the motion mechanism 300 drives the sample maker 200 to rotate in the horizontal plane via the lifting component 320, facilitating flexible selection of the material cutting position. The lifting component 320 directly drives the sample maker 200 to precisely rise and fall along the material thickness direction, ensuring the accuracy of the cutting depth and the measured thickness. Furthermore, the frame 100 provides stable support for the material. Combined with the coordinated movement of rotation and lifting, the sample preparation process adapts to changes in material thickness and diverse cutting requirements, enhancing the equipment's versatility and reliability.

[0034] It should be noted that, in this utility model, unless otherwise stated, directional terms such as "up," "down," "left," "right," "front," and "back" generally refer to the directions indicated by the accompanying drawings.

[0035] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sample preparation device, characterized in that, The sample preparation device includes: A frame (100) is used to hold the material to be cut; The sample (200) includes a cutting blade (210) for cutting the material and a measuring probe (220) for measuring the thickness of the material. A motion mechanism (300) is installed on the frame (100). The cutting blade (210) and the measuring probe (220) are both connected to the motion mechanism (300). The motion mechanism (300) includes a rotating component (310) and a lifting component (320) connected to the rotating component (310). The rotating component (310) is used to drive the sample (200) to rotate in the horizontal plane through the lifting component (320). The lifting component (320) is used to drive the sample (200) to rise and fall along the thickness direction of the material.

2. The sample preparation device according to claim 1, characterized in that, The motion mechanism (300) further includes a connecting column (330) connected to the rotating member (310), the lifting member (320) is connected to the connecting column (330), the sample (200) is connected to the lifting member (320), and the rotating member (310) is used to drive the connecting column (330) to rotate so that the sample (200) rotates in the horizontal plane.

3. The sample preparation device according to claim 2, characterized in that, There are two motion mechanisms (300), and the cutting blade (210) and the measuring probe (220) are respectively connected to the two motion mechanisms (300).

4. The sample preparation device according to claim 2, characterized in that, The lifting component (320) connected to the cutting blade (210) is a cylinder (321), and the lifting component (320) connected to the measuring probe (220) is a hydraulic rod (322).

5. The sample preparation device according to any one of claims 1 to 4, characterized in that, The cutting blade (210) is detachably connected via a quick-release assembly (500) and the lifting component (320).

6. The sample preparation device according to claim 5, characterized in that, The quick-release assembly (500) includes: An upper threaded column (510) with external threads is disposed at the bottom of the lifting member (320); A threaded post (520) with external threads is disposed on the top of the cutting tool (210); The sleeve (530) is provided with an internal thread that engages with the upper threaded post (510) and the lower threaded post (520).

7. The sample preparation device according to any one of claims 1 to 4, characterized in that, The frame (100) includes a support column (110) and a base (120), the support column (110) being connected to the base (120), the base (120) being used to support the material to be cut.

8. The sample preparation device according to claim 7, characterized in that, The frame (100) also includes a pad (130) for supporting the material. The base (120) is provided with a limiting ring (122) with a limiting groove (121). The limiting groove (121) is used to accommodate and limit the pad (130), and the limiting groove (121) is provided with an opening for the pad (130) to pass through.

9. The sample preparation device according to claim 8, characterized in that, A signal receiver (131) is detachably mounted on the pad (130). The signal receiver (131) is used to cooperate with the measuring probe (220) to measure the thickness of the material.

10. The sample preparation device according to any one of claims 1 to 4, characterized in that, The sample preparation device also includes a controller (400), the motion mechanism (300) is electrically connected to the controller (400), and is used to start and stop the lifting component (320) and the rotating component (310).

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