Hardness detection equipment for plastic suction nozzle

Abstract

The invention discloses hardness detection equipment for a plastic suction nozzle, and relates to the technical field of hardness detection, and the hardness detection equipment comprises a rack and an arc-shaped frame welded at the top end of the rack; the placing mechanism is used for placing the plastic suction nozzles needing to be detected, the plastic suction nozzles needing to be detected can be placed by arranging the placing mechanism, the plastic suction nozzles needing to be detected can be driven to rotate, and the effect of discharging the plastic suction nozzles in different directions after detection is completed is achieved; and the discharging mechanism is provided with a mechanism for changing the inclination angle of the placing mechanism, and by arranging the discharging mechanism, when the quality of the plastic suction nozzles is detected, if the quality of the plastic suction nozzles is qualified, the plastic suction nozzles can be automatically discharged to the right side of the upper surface of the rack, and when the quality of the plastic suction nozzles is unqualified, the discharging mechanism can automatically discharge the plastic suction nozzles to the right side of the upper surface of the rack. And the plastic suction nozzles are automatically arranged on the left side of the upper surface of the rack, and the effect of screening out the plastic suction nozzles with unqualified hardness is achieved.

Description

Technical Field

[0001] This invention relates to the field of hardness testing technology, specifically to a hardness testing device for a plastic suction nozzle. Background Technology

[0002] Hardness testing of plastics is one of the important methods for evaluating the mechanical properties of materials. Commonly used testing standards include Shore hardness, Rockwell hardness, and Barcol hardness. Shore hardness is divided into Type A and Type D, applicable to soft and hard plastics respectively. It is achieved by pressing an indenter into the sample surface under standard pressure, and the hardness value is calculated based on the indentation depth. The result is expressed as Shore A or Shore D. Rockwell hardness testing uses different indenters and loads and is suitable for high-hardness plastics. The hardness grade is determined by measuring the difference in indentation depth (e.g., using an R scale). Barcol hardness is determined using a tapered indenter and is commonly used for fiber-reinforced plastics. Testing must strictly follow ASTM D2240 (Shore), ASTM D785 (Rockwell), or ISO standards, ensuring uniform sample thickness, a smooth surface, and that the ambient temperature and humidity meet requirements (typically 23±2℃, 50±5%RH). Hardness data reflects the material's wear resistance, compressive strength, and processing performance, providing guidance for product quality control and application selection. The report must specify the test method, instrument model, and sample condition to ensure the repeatability and comparability of the results.

[0003] In the production process of plastic suction nozzles, if the hardness testing process fails to effectively eliminate parts that have deteriorated due to deformation, it will directly affect the product's performance and reliability. Plastic suction nozzles are commonly used in medical, food, or industrial fluid transportation fields. Insufficient hardness can lead to deformation, cracking, or sealing failure during assembly or use, which can then cause liquid leakage, contamination, or equipment malfunction. For example, in medical infusion systems, if the suction nozzle deforms due to insufficient hardness, it may cause abnormal drug flow or connection detachment, endangering patient safety. In the food packaging field, inferior suction nozzles may break due to their inability to withstand repeated opening and closing, resulting in product contamination or consumer complaints. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a hardness testing device for plastic nozzles, comprising a frame and an arc-shaped frame welded to the top of the frame; The placement mechanism is used to place the plastic nozzles to be tested. By setting the placement mechanism, the plastic nozzles to be tested can be placed and can be driven to rotate, so as to achieve the effect of discharging the plastic nozzles in different directions after the test is completed. The material feeding mechanism has a mechanism to change the tilt angle of the placement mechanism. By setting the material feeding mechanism, if the plastic nozzle passes the quality inspection, the plastic nozzle will be automatically discharged to the right side of the upper surface of the frame. If the plastic nozzle fails the quality inspection, the plastic nozzle will be automatically discharged to the left side of the upper surface of the frame, thus achieving the effect of plastic nozzle quality inspection and diversion. The placement mechanism includes a disc that is rotatably connected to the inner cavity of an arc-shaped frame. An arc-shaped track made of iron is welded to the lower surface of the disc. By setting the disc, the plastic suction cup to be tested can be placed and rotated under the control of the discharge mechanism, thereby allowing the plastic suction nozzle on the upper surface to be discharged. The material discharge mechanism includes a limiting tube, with a sliding column slidably connected to the inner cavity of the limiting tube. A bent rod is welded to the end of the sliding column, and a magnetic ball is fixedly connected to the end of the bent rod away from the sliding column. The magnetic ball is made of magnetic material and is frictionally adapted to the inner wall of the arc-shaped track. The material discharge mechanism also includes a triggering mechanism, which is used to trigger the material discharge function of the placement mechanism. By setting the limiting tube, the sliding column can be limited, allowing the sliding column to move laterally within its inner cavity. This causes the bent rod to drive the magnetic ball to move along the inner wall of the arc-shaped track. Furthermore, a groove is provided on the lower surface of the limiting tube, allowing the bent rod to move laterally within the inner cavity of the limiting tube. By setting the magnetic ball, the magnetic ball can be attracted to the arc-shaped track as the bent rod moves with the sliding column, thereby causing the disc to tilt.

[0005] Preferably, the placement mechanism is rotatably connected to the inner cavity of the arc-shaped frame, the discharge mechanism is disposed on the outer side of the arc-shaped frame, and a wrapping shell is welded to the outer side of the arc-shaped frame, the outer surface of which has holes.

[0006] Preferably, a first support rod is welded to the upper surface of the arc-shaped frame, a connecting frame is welded to the top of the first support rod, a pressure detector is provided on the upper surface of the connecting frame, the output end of the pressure detector passes through the connecting frame, a first moving rod is installed on the output end of the pressure detector through a coupling, and a pressing plate is fixedly connected to the bottom end of the first moving rod.

[0007] Preferably, a first rotating column is fixedly connected to the side of the disc near the inner wall of the arc frame, a first rolling bearing is fixedly connected to the outer surface of the first rotating column, the outer ring of the first rolling bearing is fixedly connected to the inner wall of the arc frame, a placement plate is welded to the upper surface of the disc directly below the extrusion plate, and a material passage hole is opened on the side of the upper surface of the disc away from the placement plate.

[0008] Preferably, the limiting tube is movably connected to the hole opened on the outer surface of the packaging shell, a second rotating column is welded to the middle of the outer surface of the limiting tube, a second rolling bearing is fixedly connected to the outer surface of the second rotating column, a second support rod is welded to the outer ring of the second rolling bearing, and the end of the second support rod away from the second rolling bearing is welded to the outer surface of the packaging shell.

[0009] Preferably, the outer surface of the enclosure is symmetrically welded with track tubes, and a hydraulic cylinder is welded between the opposite surfaces of the track tubes. A second moving rod is installed at the output end of the hydraulic cylinder via a coupling, and the end of the second moving rod away from the hydraulic cylinder is welded to the end of the sliding column away from the bent rod.

[0010] Preferably, the triggering mechanism includes a third support rod, which is welded to the outer surface of the casing. A limit block is welded to the end of the third support rod away from the casing. A rotating tube is rotatably connected to the outer surface of the limit block, and a crossbar is welded to the upper surface of the rotating tube.

[0011] Preferably, an extrusion sleeve is riveted to one end of the crossbar near the extrusion plate, and an extrusion ball is welded to one side of the extrusion plate near the crossbar, the extrusion ball being extruded and adapted to the inner wall of the extrusion sleeve.

[0012] Preferably, an inner dodecagonal tube is welded to the outer side of the crossbar away from the extrusion sleeve, and a rotating frame is rotatably connected to the outer surface of the inner dodecagonal tube. A sliding ball is welded to the end of the rotating frame, and the sliding ball is slidably connected to the inner wall of the track tube.

[0013] Preferably, the outer surface of the rotating frame is welded with an internally threaded tube, which is sleeved on the outer surface of the inner dodecagonal tube. A threaded post is threadedly connected to the inner cavity of the internally threaded tube, and a dodecagonal prism is rotatably connected to the inner cavity of the threaded post. The dodecagonal prism is frictionally adapted to the inner wall of the inner dodecagonal tube.

[0014] This invention provides a device for testing the hardness of plastic suction nozzles. It has the following beneficial effects: I. The plastic nozzle hardness testing equipment, through the setting of a placement mechanism, can place the plastic nozzle to be tested and drive the plastic nozzle to be tested to rotate, so as to achieve the effect of discharging plastic nozzles in different directions after the test is completed.

[0015] Second, the hardness testing equipment for this plastic nozzle, through the discharge mechanism, can automatically discharge the plastic nozzle to the right side of the upper surface of the frame if the plastic nozzle quality is up to standard, and automatically discharge the plastic nozzle to the left side of the upper surface of the frame if the plastic nozzle quality is not up to standard, thus achieving the effect of plastic nozzle quality testing and diversion.

[0016] Third, the hardness testing device for the plastic nozzle, by setting a limiting tube, can limit the sliding column, so that the sliding column can move laterally in its inner cavity, thereby causing the bent rod to drive the magnetic ball to move on the inner wall of the arc track. Furthermore, the lower surface of the limiting tube has a groove, which allows the bent rod to move laterally in the inner cavity of the limiting tube. By setting the magnetic ball, when the bent rod moves with the sliding column, the magnetic ball can be attracted to the arc track, thereby causing the disc to tilt.

[0017] IV. The hardness testing equipment for the plastic nozzle, through a pressure testing instrument, can apply a downward pressure to the plastic nozzle during testing, thereby realizing the hardness testing of the plastic nozzle. By setting a first moving rod and a squeezing plate, when the pressure testing instrument applies downward squeezing force, the squeezing plate can squeeze the upper surface of the plastic nozzle.

[0018] 5. The plastic nozzle hardness testing equipment, by setting a trigger mechanism, can guide the plastic nozzle during testing when the hardness of the plastic nozzle does not meet the requirements, so that the plastic nozzle is discharged to the area on the left side of the upper surface of the frame. By setting a limit block, the rotating tube can be limited, so that the rotating tube can generate stable rotation on the outer surface of the limit block, thereby causing the crossbar to change angle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of a hardness testing device for a plastic nozzle according to the present invention; Figure 2 This is a side view of the structure of a hardness testing device for a plastic suction nozzle according to the present invention; Figure 3 This is a partial structural schematic diagram of a hardness testing device for a plastic suction nozzle according to the present invention; Figure 4 This is a schematic diagram of the placement mechanism of the present invention; Figure 5 This is a schematic cross-sectional view of the placement mechanism of the present invention; Figure 6 This is a schematic diagram of the material discharge mechanism of the present invention; Figure 7 This is a partial structural diagram of the material discharge mechanism of the present invention; Figure 8 This is a partial cross-sectional structural diagram of the material discharge mechanism of the present invention; Figure 9 This is a schematic diagram of the triggering mechanism structure of the present invention; Figure 10 This is a partial structural diagram of the triggering mechanism of the present invention.

[0020] In the diagram: 1. Frame; 2. Arc-shaped frame; 3. Encasing shell; 4. Hole; 6. Placement mechanism; 7. Discharge mechanism; 8. First support rod; 9. Connecting frame; 10. Pressure detector; 11. First moving rod; 12. Extrusion plate; 13. Extrusion ball; 61. First rotating column; 62. First rolling bearing; 63. Disc; 64. Through hole; 65. Placement plate; 66. Arc-shaped track; 71. Second support rod; 72. Second rolling bearing; 73. Second rotating column. 74. Moving column; 75. Limiting tube; 76. Triggering mechanism; 77. Track tube; 78. Hydraulic cylinder; 79. Second moving rod; 70. Sliding column; 710. Bending rod; 711. Magnetic ball; 751. Third support rod; 752. Limiting block; 753. Rotating tube; 754. Crossbar; 755. Extrusion sleeve; 756. Inner dodecagonal tube; 757. Inner threaded tube; 758. Rotating frame; 759. Sliding ball; 7510. Dodecagonal prism; 7511. Threaded column. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] like Figures 1-10 As shown, the present invention provides a technical solution: a hardness testing device for plastic nozzles, including a frame 1 and an arc-shaped frame 2 welded to the top of the frame 1; The placement mechanism 6 is used to place the plastic nozzle to be tested. By setting the placement mechanism 6, the plastic nozzle to be tested can be placed and can drive the plastic nozzle to be tested to rotate, so as to achieve the effect of discharging the plastic nozzle in different directions after the test is completed. The material discharge mechanism 7 has a mechanism for changing the tilt angle of the placement mechanism 6. By setting the material discharge mechanism 7, if the plastic nozzle passes the quality inspection, the plastic nozzle will be automatically discharged to the right side of the upper surface of the frame 1. If the plastic nozzle fails the quality inspection, the plastic nozzle will be automatically discharged to the left side of the upper surface of the frame 1, thus achieving the effect of plastic nozzle quality inspection and diversion. The placement mechanism 6 includes a disc 63, which is rotatably connected to the inner cavity of the arc frame 2. An arc track 66 is welded to the lower surface of the disc 63. The arc track 66 is made of iron. By setting the disc 63, the plastic suction cup to be tested can be placed, and it rotates under the control of the discharge mechanism 7, so that the plastic suction nozzle on the upper surface can be discharged. The material discharge mechanism 7 includes a limiting tube 74, with a sliding column 79 slidably connected to the inner cavity of the limiting tube 74. A bent rod 710 is welded to the end of the sliding column 79, and a magnetic ball 711 is fixedly connected to the end of the bent rod 710 away from the sliding column 79. The magnetic ball 711 is made of magnet material and is frictionally adapted to the inner wall of the arc-shaped track 66. The material discharge mechanism 7 also includes a triggering mechanism 75, which is used to trigger the material discharge function of the placement mechanism 6. By setting the limiting tube 74, the material discharge mechanism can be controlled. The sliding column 79 is limited, allowing it to move laterally within its inner cavity. This causes the bent rod 710 to move along the inner wall of the arc-shaped track 66. The lower surface of the limiting tube 74 has a groove, allowing the bent rod 710 to move laterally within its inner cavity. By providing the magnetic ball 711, the bent rod 710 can be attracted to the arc-shaped track 66 as it moves with the sliding column 79, causing the disc 63 to tilt.

[0023] The placement mechanism 6 is rotatably connected to the inner cavity of the arc frame 2, and the discharge mechanism 7 is set on the outer side of the arc frame 2. The outer side of the arc frame 2 is welded with a wrapping shell 3. The outer surface of the wrapping shell 3 is provided with holes 4. By providing holes 4, the limiting tube 74 can be made to shake in the inner cavity of the wrapping shell 3.

[0024] A first support rod 8 is welded to the upper surface of the arc-shaped frame 2. A connecting frame 9 is welded to the top of the first support rod 8. A pressure detector 10 is installed on the upper surface of the connecting frame 9. The output end of the pressure detector 10 passes through the connecting frame 9. A first moving rod 11 is installed on the output end of the pressure detector 10 through a coupling. A pressing plate 12 is fixedly connected to the bottom end of the first moving rod 11. By setting the pressure detector 10, a downward pressure can be applied to the plastic nozzle during testing, thereby realizing the hardness testing of the plastic nozzle. By setting the first moving rod 11 and the pressing plate 12, when the pressure detector 10 applies downward pressure, the pressing plate 12 can press the upper surface of the plastic nozzle.

[0025] A first rotating column 61 is fixedly connected to the side of the disc 63 near the inner wall of the arc frame 2. A first rolling bearing 62 is fixedly connected to the outer surface of the first rotating column 61. The outer ring of the first rolling bearing 62 is fixedly connected to the inner wall of the arc frame 2. A placement plate 65 is welded to the upper surface of the disc 63 directly below the extrusion plate 12. A material passage hole 64 is opened on the side of the upper surface of the disc 63 away from the placement plate 65. By setting the first rotating column 61 and the first rolling bearing 62, the disc 63 can generate stable rotation in the inner cavity of the arc frame 2. By setting the placement plate 65, plastic nozzles that need to be tested for hardness can be placed. By setting the material passage hole 64, qualified plastic nozzles can be discharged.

[0026] A limiting tube 74 is movably connected to a hole 4 on the outer surface of the casing 3. A second rotating column 73 is welded to the middle of the outer surface of the limiting tube 74. A second rolling bearing 72 is fixedly connected to the outer surface of the second rotating column 73. A second support rod 71 is welded to the outer ring of the second rolling bearing 72. The end of the second support rod 71 away from the second rolling bearing 72 is welded to the outer surface of the casing 3. By setting the second rotating column 73 and the second rolling bearing 72, the limiting tube 74 can rotate stably about the center of the second rolling bearing 72. To achieve the effect of changing the tilt angle of the limiting tube 74, the outer surface of the casing 3 is symmetrically welded with a track tube 76, and a hydraulic cylinder 77 is welded between the opposite surfaces of the track tube 76. The output end of the hydraulic cylinder 77 is equipped with a second moving rod 78 through a coupling. The end of the second moving rod 78 away from the hydraulic cylinder 77 is welded to the end of the sliding column 79 away from the bent rod 710. By setting the hydraulic cylinder 77, the second moving rod 78 at the output end can be moved under control, thereby causing the second moving rod 78 to drive the sliding column 79 to move in the inner cavity of the limiting tube 74.

[0027] The triggering mechanism 75 includes a third support rod 751, which is welded to the outer surface of the casing 3. A limiting block 752 is welded to the end of the third support rod 751 away from the casing 3. A rotating tube 753 is rotatably connected to the outer surface of the limiting block 752. A crossbar 754 is welded to the upper surface of the rotating tube 753. By setting the triggering mechanism 75, when the hardness of the plastic suction nozzle does not meet the requirements, the plastic suction nozzle in the test can be guided to the area on the left side of the upper surface of the frame 1. By setting the limiting block 752, the rotating tube 753 can be limited, so that the rotating tube 753 can generate a stable position on the outer surface of the limiting block 752. The rotation causes the crossbar 754 to change angle. A compression sleeve 755 is riveted to one end of the crossbar 754 near the compression plate 12. A compression ball 13 is welded to the side of the compression plate 12 near the crossbar 754. The compression ball 13 is compression-fitted to the inner wall of the compression sleeve 755. By setting the compression sleeve 755, when the compression plate 12 compresses the plastic nozzle, the poorly hard plastic nozzle will undergo significant deformation, causing the compression ball 13 to move downwards too far. Ultimately, the compression ball 13 aligns with the compression sleeve 755, causing one end of the crossbar 754 to move downwards and the other end upwards. The outer surface of the crossbar 754 away from the compression sleeve 755... An inner dodecagonal tube 756 is welded to the outer surface of the inner dodecagonal tube 756, and a rotating frame 758 is rotatably connected to the outer surface of the inner dodecagonal tube 756. A sliding ball 759 is welded to the end of the rotating frame 758 and is slidably connected to the inner wall of the track tube 76. By setting the inner dodecagonal tube 756, the rotating frame 758 can be limited, allowing the rotating frame 758 to rotate. By setting the sliding ball 759, when the end of the crossbar 754 away from the extrusion sleeve 755 moves upward, the sliding ball 759 causes the end of the track tube 76 and the limiting tube 74 to tilt upward, thereby causing the magnetic ball 711 to move downward. An internally threaded tube 757 is welded to the outer surface of the rotating frame 758. The internally threaded tube 757 is sleeved on the outer surface of the internally dodecagonal tube 756. A threaded post 7511 is threadedly connected to the inner cavity of the internally threaded tube 757. A dodecagonal prism 7510 is rotatably connected to the inner cavity of the threaded post 7511. The dodecagonal prism 7510 is frictionally fitted with the inner wall of the internally dodecagonal tube 756. By setting the internally threaded tube 757, the threaded post 7511 can be limited, allowing the threaded post 7511 to rotate into the inner cavity of the internally threaded tube 757, thereby allowing the dodecagonal prism 7510 to be inserted into the inner cavity of the internally dodecagonal tube 756. This achieves the effect of preventing the rotating frame 758 from rotating. At the same time, it can keep the device balanced after adjusting the angle of the crossbar 754.

[0028] Working principle: During use, the operator places the plastic nozzle to be tested for hardness into the inner cavity of the placement plate 65, and then starts the pressure detector 10. This causes the first moving rod 11 to move the extrusion plate 12 downwards, ultimately causing the extrusion plate 12 to extrude the plastic nozzle placed in the inner cavity of the placement plate 65 for hardness testing. When the plastic nozzle passes the quality test, the operator controls the output end of the hydraulic cylinder 77 to move, which in turn causes the second moving rod 78 to move the sliding column 79 toward the hydraulic cylinder 77. This causes the bent rod 710 and the magnetic ball 711 to move to the right. At the same time, the magnetic ball 711 attracts the arc-shaped track 66, ultimately causing the disc 63 and the first rotating column 61 to rotate in the inner cavity of the arc-shaped frame 2. Finally, the upper surface of the disc 63 is placed on the plate 65. The plastic suction nozzle in the inner cavity tilts and falls into the space on the right side of the upper surface of the frame 1 through the material passage 64. When the hardness of the plastic suction nozzle fails the test, it will deform due to insufficient hardness, which will cause the extrusion ball 13 to move downward too far. Finally, the extrusion ball 13 will move downward against the extrusion sleeve 755, and the other end of the crossbar 754 will move upward. While the end of the crossbar 754 away from the extrusion sleeve 755 is tilted, the rotating frame 758 will drive the sliding ball 759 to move upward. Finally, the end of the track tube 76 and the limit tube 74 away from the magnetic ball 711 will tilt. The magnetic ball 711 will drive the arc track 66 to move downward, which will cause the disc 63 to tilt and the plastic suction nozzle with poor upper surface quality to slide into the space on the left side of the upper surface of the frame 1.

[0029] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A hardness testing apparatus for a plastic mouthpiece, characterized by, Include: Frame (1), and the arc-shaped frame (2) welded at the top of the frame (1); Placing mechanism (6) for placing the plastic nozzle to be detected; Discharging mechanism (7) with mechanism for changing the inclination angle of the placing mechanism (6); The placing mechanism (6) includes a disc (63) rotatably connected at the inner cavity of the arc-shaped frame (2), and the lower surface of the disc (63) is welded with an arc-shaped track (66) made of iron; The discharging mechanism (7) includes a limiting tube (74) with a sliding column (79) slidingly connected at the inner cavity of the limiting tube (74), and the end of the sliding column (79) is welded with a bent rod (710), and the end of the bent rod (710) away from the sliding column (79) is fixedly connected with a magnetic ball (711) made of magnet material, which is frictionally matched with the inner wall of the arc-shaped track (66), and the discharging mechanism (7) further includes a trigger mechanism (75) for triggering the discharging function of the placing mechanism (6).

2. The hardness testing apparatus for a plastic mouthpiece according to claim 1, characterized by: The placing mechanism (6) is rotatably connected at the inner cavity of the arc-shaped frame (2), and the discharging mechanism (7) is arranged on the outer side of the arc-shaped frame (2), and the outer side of the arc-shaped frame (2) is welded with a wrapping shell (3) having a hole (4) formed on the outer surface thereof.

3. A hardness testing apparatus for plastic mouthpieces as claimed in claim 2, wherein: The upper surface of the arc-shaped frame (2) is welded with a first supporting rod (8), the top end of the first supporting rod (8) is welded with a connecting frame (9), the upper surface of the connecting frame (9) is provided with a pressure detector (10), the output end of the pressure detector (10) penetrates through the connecting frame (9), and the output end of the pressure detector (10) is installed with a first moving rod (11) through a shaft coupling, and the bottom end of the first moving rod (11) is fixedly connected with an extrusion plate (12).

4. The hardness testing apparatus for plastic mouthpieces of claim 3, wherein: The first rotating column (61) is fixedly connected to the side of the disc (63) close to the inner wall of the arc-shaped frame (2), the first rotating column (61) is fixedly connected with a first rolling bearing (62) on the outer surface thereof, the outer ring of the first rolling bearing (62) is fixedly connected to the inner wall of the arc-shaped frame (2), and the placing plate (65) is welded on the upper surface of the disc (63) directly below the extrusion plate (12), and the material transparent hole (64) is formed on the side of the upper surface of the disc (63) away from the placing plate (65).

5. A hardness testing apparatus for plastic mouthpieces as claimed in claim 4, wherein: The limiting tube (74) is movably connected at the hole (4) formed on the outer surface of the wrapping shell (3), the second rotating column (73) is welded on the outer surface of the limiting tube (74), the second rotating column (73) is fixedly connected with a second rolling bearing (72) on the outer surface thereof, the second supporting rod (71) is welded at the outer surface of the wrapping shell (3) at the outer ring of the second rolling bearing (72), and the second supporting rod (71) is welded at the outer surface of the wrapping shell (3) at the outer ring of the second rolling bearing (72).

6. A hardness testing apparatus for plastic mouthpieces as defined in claim 5, wherein: The outer side of the package shell (3) is symmetrically welded with a rail pipe (76), opposite surfaces of the rail pipe (76) are welded with a hydraulic cylinder (77), an output end of the hydraulic cylinder (77) is installed with a second moving rod (78) through a shaft coupling, and one end of the second moving rod (78) away from the hydraulic cylinder (77) is welded at one end of a sliding column (79) away from the bent rod (710).

7. A hardness testing apparatus for plastic mouthpieces as claimed in claim 6, wherein: The trigger mechanism (75) comprises a third support rod (751) welded at the outer surface of the package shell (3), one end of the third support rod (751) away from the package shell (3) is welded with a limiting block (752), the outer surface of the limiting block (752) is rotatably connected with a rotating pipe (753), and the upper surface of the rotating pipe (753) is welded with a cross rod (754).

8. A hardness testing apparatus for plastic mouthpieces as claimed in claim 7, wherein: One end of the cross rod (754) close to the extrusion plate (12) is riveted with an extrusion sleeve (755), one side of the extrusion plate (12) close to the cross rod (754) is welded with an extrusion ball (13), and the extrusion ball (13) is extruded and matched with the inner wall of the extrusion sleeve (755).

9. A hardness testing apparatus for plastic mouthpieces as defined in claim 8, wherein: The outer side of one end of the cross rod (754) away from the extrusion sleeve (755) is welded with an inner twelve-rib pipe (756), the outer surface of the inner twelve-rib pipe (756) is rotatably connected with a rotating frame (758), and the end of the rotating frame (758) is welded with a sliding ball (759) which is slidingly connected at the inner wall of the rail pipe (76).

10. A hardness testing apparatus for plastic mouthpieces as claimed in claim 9, wherein: The outer surface of the rotating frame (758) is welded with an inner threaded pipe (757) which is sleeved at the outer surface of the inner twelve-rib pipe (756), the inner cavity of the inner threaded pipe (757) is threadedly connected with a threaded column (7511), the inner cavity of the threaded column (7511) is rotatably connected with a twelve-rib column (7510) which is frictionally matched with the inner wall of the inner twelve-rib pipe (756).

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