A plastic parts transmittance detector

Abstract

The present invention relates to the technical field of transmittance detection, and in particular to a plastic parts transmittance detector. The detector includes a detector body, a bearing, a mounting plate, a support rod, a laser emitter, a support column, etc. The mounting plate is rotatably mounted on the detection platform of the detector body through the bearing, the support rod is connected to the top of the mounting plate, and a vertical groove is opened on the side of the support rod, the laser emitter is installed on the upper end of the support rod, and the support column is connected to the top of the laser emitter, and a through hole and a guide groove are opened on the support column. The present invention can adapt to plastic parts of various complex shapes through an improved detection platform and positioning assembly, especially for parts with curved or special-shaped surfaces, and can perform transmittance detection on them without destroying the parts, which can not only avoid the problem of instability of the parts on the detection platform, but also eliminate the need to cut the part to be detected from the part as a sample, saving time and manpower, while ensuring the representativeness and accuracy of the detection data.

Description

Technical Field

[0001] The invention relates to the technical field of light transmittance detection, and in particular to a light transmittance detector for plastic parts. Background Art

[0002] With the widespread application of laser welding technology in various industries, the performance requirements for welding materials are getting higher and higher, especially optical properties, such as transmittance, which has become one of the important indicators for evaluating the quality of welding materials. Transmittance not only directly affects the transmission efficiency of laser energy, but also affects the welding quality and the reliability of the finished product. Therefore, accurate and reliable transmittance detection methods are of great significance for the quality control of laser welding.

[0003] The existing full-screen laser plastic transmittance tester mainly uses laser as the light source, and calculates the transmittance by measuring the intensity change of the laser after it passes through the plastic part. When in use, the plastic part to be tested is first placed on the test platform manually, and then the laser is controlled to pass through the position to be tested of the plastic part and fall on the test platform. The transmittance of the plastic part can be analyzed by the laser intensity received by the test platform. However, this detector can only test single-layer parts with flat surfaces (such as Figure 1 In the welding case A shown in the figure, the second welded part can be directly placed flat on the testing platform to test the transmittance of its top surface. For parts with curved or special shapes, such parts cannot be placed stably on the testing platform (such as Figure 1 In the welding cases B and C shown in the figure, the second welded part needs to be flipped 90 degrees vertically and placed on the testing platform for the transmittance test on its side. At this time, the second welded part is prone to rolling, which will affect the accuracy of the test results. In addition, for parts with specific geometric shapes such as rings or squares, when they are placed on the testing platform for the side transmittance test, the laser usually passes through the double-layer structure of the part (such as Figure 1 In the cases B and C shown, when the second welded part is flipped 90 degrees vertically and placed on the detection platform, the laser needs to pass through the double-layer structure of the second welded part to reach the detection platform), which will also affect the accuracy of the final detection result. Therefore, in order to obtain accurate transmittance data, for the above-mentioned parts with complex shapes, the current method is to manually cut the part to be tested from the part as a sample for separate testing, which not only increases the workload, but also may cause differences between the sample and the actual product, thereby affecting the representativeness of the test. Summary of the invention

[0004] In view of this, the present invention provides a plastic part transmittance tester, which can overcome the shortcomings of existing full-screen laser plastic transmittance testers that can usually only perform transmittance detection on parts with a single layer and a smooth surface. For parts with complex shapes, it is necessary to manually cut out the part to be tested from the part as a sample for separate testing, which not only increases the workload but also makes it difficult to ensure the accuracy of the test data.

[0005] A plastic parts transmittance detector includes a detector body, a bearing, a mounting plate, a support rod, a laser transmitter, a support column, a receiver and a lifting assembly. The mounting plate is rotatably mounted on a detection platform of the detector body through a bearing, the support rod is connected to the top of the mounting plate, and a vertical groove is provided on the side of the support rod, the laser transmitter is mounted on the upper end of the support rod, the support column is connected to the top of the laser transmitter, a through hole and a guide groove are provided on the support column, the through hole and the guide groove are connected, and a laser beam emitted by the laser transmitter can vertically pass through the through hole, and a lifting assembly for driving the receiver to lift and lower is also provided on the detection platform of the detector body, and the receiver is located directly above the laser transmitter and is used to receive the laser beam emitted by the laser transmitter.

[0006] Furthermore, the lifting assembly includes a fixed rod, a guide round rod, a mounting block, a reinforcing rod and a first electric push rod, the fixed rod is connected to the top of the mounting plate, the guide round rod is slidably connected to the fixed rod, the mounting block is connected to the upper end of the guide round rod, the reinforcing rod is connected to the side of the mounting block, and the end of the reinforcing rod is fixedly connected to the receiver, the first electric push rod is connected to the top of the mounting plate, and the telescopic rod of the first electric push rod slides through the top of the fixed rod and is connected to the bottom of the mounting block.

[0007] Furthermore, it also includes a rubber retaining ring and a connecting spring. The rubber retaining ring is slidably connected to the outside of the receiver. The connecting spring is wound around the outside of the receiver, and the two ends of the connecting spring are respectively connected to the top of the rubber retaining ring and the bottom of the reinforcing rod.

[0008] Furthermore, it also includes a sliding rod, a connecting ring, a return spring and a rubber ring. The sliding rod is symmetrically slidably connected to the support rod, the connecting ring is connected to the upper end of the sliding rod, and the connecting ring is sleeved on the outside of the support column. The return spring is wrapped around the outside of the sliding rod, and the two ends of the return spring are respectively connected to the top of the support rod and the bottom of the connecting ring, and the rubber ring is connected to the top of the connecting ring.

[0009] Furthermore, it also includes a connecting plate, a second electric push rod, a slider and a hollow vertical tube, the connecting plate is connected to the side of the support rod, the second electric push rod is connected to the connecting plate, the slider is connected to the telescopic rod of the second electric push rod, and the slider is located in the guide groove, the hollow vertical tube is connected to the side of the slider, and the hollow vertical tube is located in the through hole.

[0010] Furthermore, it also includes a support plate, a guide ring, a vertical rod, a pressure plate, a connecting rod and a third electric push rod. The support plate is connected to the top of the detection platform of the detector body, the guide ring is symmetrically connected to the detection platform of the detector body, the vertical rod is slidably connected in the guide ring, the pressure plate is connected to the upper end of the vertical rod, and the pressure plate is located directly above the support plate, the connecting rod is connected to the lower end of the vertical rod, the third electric push rod is symmetrically connected to the inside of the detection platform of the detector body, and the telescopic rod of the third electric push rod is fixedly connected to the connecting rod.

[0011] Furthermore, it also includes a fixed baffle, a corrugated square tube, a square frame and a fourth electric push rod. The fixed baffle is connected to the detector body and is located directly above the pressure plate. The corrugated square tube is connected to the top of the detection platform of the detector body and is located outside the support plate. The square frame is connected to the upper end of the corrugated square tube. The fourth electric push rod is symmetrically connected to the inside of the detection platform of the detector body, and the telescopic rod of the fourth electric push rod is fixedly connected to the square frame.

[0012] Furthermore, the support plate and the pressure plate are both made of optical glass.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention can adapt to plastic parts of various complex shapes through an improved detection platform and positioning components, especially for parts with curved or irregular surfaces, and can perform transmittance detection on them without destroying the parts, which not only avoids the problem of instability of the parts on the detection platform, but also eliminates the need to cut off the part to be detected from the part as a sample, saving time and manpower, while ensuring the representativeness and accuracy of the detection data.

[0014] 2. The present invention can effectively isolate external light interference by adopting flattening components and shading structures (such as rubber baffle rings, rubber rings and square frames). This design can not only improve the stability of detection, but also ensure the reliability and consistency of detection results. This is especially important for occasions such as laser welding that have strict requirements on the optical properties of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of welding of the first welding part and the second welding part.

[0016] Figure 2 This is a schematic diagram of the third welding part during transmittance testing.

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 4 The figure is a schematic diagram of the installation of the laser transmitter, support column, receiver and lifting assembly of the present invention.

[0019] Figure 5It is a cross-sectional view of the support column and the rubber retaining ring of the present invention.

[0020] Figure 6 The figure is a schematic diagram of the installation of the sliding rod, the connecting ring, the return spring, the rubber ring and the connecting plate of the present invention.

[0021] Figure 7 The figure is a schematic diagram of the installation of the support plate, guide ring, vertical rod, pressure plate and connecting rod of the present invention.

[0022] Figure 8 It is a schematic diagram of the specific structure of the vertical rod, the pressure plate, the connecting rod and the third electric push rod of the present invention.

[0023] Fig. 9 It is a schematic diagram of the installation of the fixed baffle, the corrugated square tube, the square frame and the fourth electric push rod of the present invention.

[0024] In the above figures: 001-first welding part, 002-second welding part, 003-third welding part, 0031-groove plane, 0032-groove slope, 004-laser beam, 1-detector body, 101-detection platform, 102-display, 2-bearing, 3-mounting plate, 4-support rod, 401-vertical groove, 5-laser transmitter, 6-support column, 601-through hole, 602-guide groove, 7-receiver, 8-fixing rod, 9-guide round rod, 10-mounting block, 11- reinforcing rod, 12- first electric push rod, 13- rubber baffle ring, 14- connecting spring, 15- sliding rod, 16- connecting ring, 17- reset spring, 18- rubber ring, 19- connecting plate, 20- second electric push rod, 21- sliding block, 22- hollow vertical pipe, 23- supporting plate, 24- guide ring, 25- vertical rod, 26- pressure plate, 27- connecting rod, 28- third electric push rod, 29- fixed baffle, 30- corrugated square tube, 31- square frame, 32- fourth electric push rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment: A plastic parts transmittance detector, such as Figure 3-Figure 5As shown, it includes a detector body 1, which is a full-screen laser plastic transmittance detector. The detector body 1 includes a detection platform 101 and a display 102. The operator can place the plastic parts on the top of the detection platform 101, and then control the detector body 1 to perform transmittance detection on the plastic parts. The detection screen and detection data will be displayed through the display 102. The above is the prior art and will not be described in detail; it also includes a bearing 2, a mounting plate 3, a support rod 4, a laser transmitter 5, a support column 6, a receiver 7 and a lifting assembly. A bearing 2 is installed on the left rear side of the upper part of the detection platform 101, and the outer ring of the bearing 2 is connected to the mounting plate 3 so that the mounting plate 3 can rotate freely on the detection platform 101 through the bearing 2. The front side of the top of the mounting plate 3 is connected to the support rod 4, and a vertical groove 401 is opened on the right side of the support rod 4. A laser transmitter 5 is installed on the upper end of the support rod 4, and a connection line (not shown in the figure) of the laser transmitter 5 can be derived from the vertical groove 401. The top of the laser transmitter 5 is connected to the support column 6, and the support column 6 A through hole 601 aligned with the laser emitter 5 is vertically opened at the center position, and a guide groove 602 connected to the through hole 601 is vertically opened on the right part of the support column 6. A lifting assembly for driving the receiver 7 to lift is also provided on the detection platform 101, and the receiver 7 is located directly above the laser emitter 5, so that the laser beam 004 emitted by the laser emitter 5 can vertically pass through the through hole 601 and be received by the receiver 7; the lifting assembly includes a fixing rod 8, a guide round rod 9, a mounting block 10, a reinforcing rod 11 and a first An electric push rod 12, a fixed rod 8 is connected to the rear side of the top of the mounting plate 3, a guide round rod 9 is slidably connected to the front side of the upper part of the fixed rod 8, a mounting block 10 is connected to the upper end of the guide round rod 9, a reinforcing rod 11 is connected to the upper front side of the mounting block 10, and the front end of the reinforcing rod 11 is fixedly connected to the receiver 7, a first electric push rod 12 is also connected to the rear side of the top of the mounting plate 3, the first electric push rod 12 is located below the fixed rod 8, and the telescopic rod of the first electric push rod 12 slides through the top of the fixed rod 8 and is connected to the bottom of the mounting block 10.

[0027] like Figure 1 In the welding situation A shown in the figure, when it is necessary to perform transmittance test on a single-layer plastic part with a flat surface, the second welded part 002 can be directly placed flat on the top of the detection platform 101 of the detector body 1, and then the detector body 1 is controlled to perform transmittance test on the top surface of the second welded part 002, and the test screen and test data will be displayed on the display 102; Figure 1For the welding conditions B and C shown in the figure, when it is necessary to perform transmittance detection on plastic parts with complex shapes, first, the mounting plate 3 can be rotated 90 degrees to the left to disengage from the detection platform 101, and then the plastic part can be sleeved on the outside of the laser emitter 5 or the outside of the receiver 7, and the orientation and angle of the plastic part can be adjusted so that the part to be detected of the plastic part is between the laser emitter 5 and the receiver 7, and then the plastic part can be moved downward so that the bottom of the part to be detected of the plastic part contacts the top of the support column 6, and the support column 6 is used to support the plastic part to prevent the laser emitter 5 from directly contacting the plastic part and causing damage, and then the telescopic rod of the first electric push rod 12 is controlled to shorten, and the first electric push rod 12 can drive the mounting block 10 to move downward, and the mounting block 10 can drive the guide round rod 9, the reinforcing rod 11 and the receiver 7 to move downward until the bottom of the receiver 7 contacts the top of the part to be detected of the plastic part, and then the telescopic rod of the first electric push rod 12 is controlled to stop shortening, At this time, the laser emitter 5 can be controlled to emit the laser beam 004 vertically upward. The laser beam 004 can pass through the through hole 601 to irradiate the part to be detected of the plastic part, and be received by the receiver 7 through the part to be detected of the plastic part. The detector body 1 can analyze the transmittance of the plastic part through the laser intensity received by the receiver 7, and the detection picture and detection data will be displayed through the display 102. In this way, the transmittance detection of plastic parts with complex shapes can be completed, and there is no need to manually cut the part to be detected on the plastic part as a sample for separate detection. It can not only save time but also ensure the accuracy of the detection data. After the detection is completed, the telescopic rod of the first electric push rod 12 can be controlled to extend, and the first electric push rod 12 can drive the mounting block 10 to move upward and reset. The mounting block 10 can drive the guide round rod 9, the reinforcing rod 11 and the receiver 7 to move upward and reset, so that the receiver 7 is separated from the plastic part, and then the detected plastic part can be taken away.

[0028] like Figure 4-Figure 6 As shown, it also includes a rubber baffle ring 13 and a connecting spring 14. The rubber baffle ring 13 is slidably connected to the lower outer side of the receiver 7. The connecting spring 14 is also wound around the outer side of the receiver 7, and the two ends of the connecting spring 14 are respectively connected to the top of the rubber baffle ring 13 and the bottom of the reinforcing rod 11; it also includes a sliding rod 15, a connecting ring 16, a reset spring 17 and a rubber ring 18. Two sliding rods 15 are slidably connected to the right side of the upper part of the support rod 4, a connecting ring 16 is connected between the upper ends of the two sliding rods 15, and the connecting ring 16 is sleeved on the outer side of the support column 6. The reset springs 17 are wound around the outer sides of the two sliding rods 15, and the two ends of the reset spring 17 are respectively connected to the top of the support rod 4 and the bottom of the connecting ring 16, and the top of the connecting ring 16 is connected to the rubber ring 18.

[0029] When the part to be inspected of the plastic part is between the laser transmitter 5 and the receiver 7, the operator will move the plastic part downward. When the bottom of the part to be inspected of the plastic part contacts the top of the rubber ring 18, the rubber ring 18 will be squeezed to move downward. The rubber ring 18 will drive the sliding rod 15 and the connecting ring 16 to move downward, and the reset spring 17 will be compressed until the bottom of the part to be inspected of the plastic part contacts the top of the support column 6. Under the elastic force of the reset spring 17, the top of the rubber ring 18 will be close to the bottom of the part to be inspected of the plastic part; then the receiver 7 will be controlled to move downward, and the receiver 7 will drive the rubber retaining ring 13 to move downward. When the bottom of the rubber retaining ring 13 contacts the top of the part to be inspected of the plastic part, the rubber retaining ring 13 stops moving downward, and the receiver 7 continues to move downward, and the connecting spring 14 is compressed until the bottom of the receiver 7 contacts the top of the part to be inspected of the plastic part. The top is in contact. Under the elastic force of the connecting spring 14, the bottom of the rubber retaining ring 13 will be tightly attached to the top of the part to be tested of the plastic part, and then the transmittance of the plastic part can be tested. During the testing process, the rubber ring 18 can block the gap between the plastic part and the support column 6, ensuring that the laser beam 004 emitted vertically by the laser transmitter 5 can be completely received by the receiver 7. At the same time, the rubber retaining ring 13 can block the gap between the plastic part and the receiver 7, ensuring that the receiver 7 is not affected by external light, thereby ensuring the accuracy of the test results; when the receiver 7 moves upward and separates from the plastic part, the connecting spring 14 will gradually return to its original state, and then the plastic part that has been tested can be removed manually to separate the plastic part from the rubber ring 18. At this time, the reset spring 17 will return to its original state, driving the rubber ring 18, the sliding rod 15 and the connecting ring 16 to move upward and reset.

[0030] like Figure 2 As shown, a groove is formed on the third welding part 003, and the top of the groove is a groove plane 0031, and the left and right sides of the groove are groove inclined surfaces 0032. When it is necessary to perform transmittance detection on the groove plane 0031 on the third welding part 003, if the third welding part 003 is directly placed between the laser transmitter 5 and the receiver 7 for transmittance detection, it is difficult to ensure that the laser beam 004 emitted vertically upward by the laser transmitter 5 can accurately penetrate the groove plane 0031 on the third welding part 003. The laser beam 004 may penetrate the groove inclined surface 0032 on the third welding part 003, resulting in inaccurate detection data. Therefore, a positioning component is designed; Figure 5 and Figure 6As shown, the positioning assembly includes a connecting plate 19, a second electric push rod 20, a slider 21 and a hollow vertical tube 22. The connecting plate 19 is connected to the upper right side of the support rod 4, the second electric push rod 20 is connected to the lower part of the connecting plate 19, and the telescopic rod of the second electric push rod 20 slides through the top of the support rod 4, the slider 21 is connected to the telescopic rod of the second electric push rod 20, and the slider 21 can slide up and down in the guide groove 602, the hollow vertical tube 22 is connected to the left side of the slider 21, and the hollow vertical tube 22 can slide up and down in the through hole 601, and the upper end surface of the hollow vertical tube 22 is flush with the top surface of the support column 6. Since the hollow vertical tube 22 is hollow, the laser beam 004 emitted by the laser emitter 5 can vertically pass through the inside of the hollow vertical tube 22.

[0031] When it is necessary to perform a transmittance test on the groove plane 0031 on the third welding part 003, it is first necessary to control the extension of the telescopic rod of the second electric push rod 20, and the second electric push rod 20 will drive the slider 21 and the hollow vertical tube 22 to move upward until the upper end of the hollow vertical tube 22 is higher than the top of the rubber ring 18. At this time, the telescopic rod of the second electric push rod 20 can be controlled to stop extending, and then the third welding part 003 can be placed on the upper end of the hollow vertical tube 22, so that the upper end of the hollow vertical tube 22 contacts the groove plane 0031 on the third welding part 003, and then the telescopic rod of the second electric push rod 20 can be controlled to shorten, and the second electric push rod 20 can be controlled to shorten. The push rod 20 will drive the slider 21 and the hollow vertical tube 22 to move downward. At this time, the operator can control the third welding part 003 to move downward synchronously with the hollow vertical tube 22 until the bottom of the third welding part 003 contacts the top of the support column 6, and the third welding part 003 stops moving downward. At this time, the telescopic rod of the second electric push rod 20 can be controlled to stop shortening, and then the transmittance test can be performed on the groove plane 0031 on the third welding part 003. At this time, the laser beam 004 emitted by the laser transmitter 5 can vertically pass through the inside of the hollow vertical tube 22 and accurately irradiate the groove plane 0031 on the third welding part 003.

[0032] Since the cooperation of the laser transmitter 5 and the receiver 7 can only perform partial transmittance detection on the plastic parts, it is impossible to perform comprehensive transmittance detection on the bent plastic parts. If the detector body 1 is directly used to detect the transmittance of the bent plastic parts, the thickness of the plastic parts that the laser passes through will be greater than the thickness of the plastic parts themselves, resulting in inaccurate detection results. Therefore, a flattening component is designed; Figure 7 and Figure 8As shown, the flattening assembly includes a support plate 23, a guide ring 24, a vertical rod 25, a pressure plate 26, a connecting rod 27 and a third electric push rod 28. The support plate 23 is connected to the top of the detection platform 101. Four guide rings 24 are symmetrically connected to the upper part of the detection platform 101, and the four guide rings 24 are distributed in a rectangular shape. The vertical rods 25 are slidably connected in the four guide rings 24, and a pressure plate 26 is connected between the upper ends of the four vertical rods 25. The pressure plate 26 is located directly above the support plate 23, and the support plate 23 and the pressure plate 26 are both made of optical glass. The light transmittance of the optical glass material is extremely high. A connecting rod 27 is connected between the lower ends of the two corresponding vertical rods 25 on the left and right. The number of the connecting rods 27 is two, and the third electric push rods 28 are connected to the front and back sides of the detection platform 101. The third electric push rods 28 correspond to the connecting rods 27 one by one, and the telescopic rods of the third electric push rods 28 are fixedly connected to the bottom of the corresponding connecting rods 27 respectively.

[0033] When it is necessary to conduct a comprehensive transmittance test on the bent plastic parts, the plastic parts can be directly placed on the top of the support plate 23, and then the telescopic rod of the third electric push rod 28 can be controlled to shorten, the third electric push rod 28 can drive the connecting rod 27 to move downward, the connecting rod 27 can drive the vertical rod 25 and the pressing plate 26 to move downward, when the pressing plate 26 contacts the top of the plastic parts, the pressing plate 26 continues to move downward to flatten the plastic parts, which is convenient for the subsequent transmittance test of the plastic parts. If the shape of the plastic parts is a single layer and the surface is flat, they can also be placed on the support plate 23 and pressed by the pressing plate 26 for transmittance test. Since the support plate 23 and the pressing plate 26 are both made of optical glass, the test results of the plastic parts are basically not affected. After the test is completed, the telescopic rod of the third electric push rod 28 can be controlled to extend, the third electric push rod 28 can drive the connecting rod 27 to move upward and reset, the connecting rod 27 can drive the vertical rod 25 and the pressing plate 26 to move upward and reset, so that the pressing plate 26 is separated from the plastic parts, and then the tested plastic parts can be taken away.

[0034] like Fig. 9 As shown, it also includes a fixed baffle 29, a corrugated square tube 30, a square frame 31 and a fourth electric push rod 32. The fixed baffle 29 is connected to the upper part of the detector body 1, and the fixed baffle 29 is located directly above the pressure plate 26. The corrugated square tube 30 is connected to the top of the detection platform 101, and the corrugated square tube 30 is located on the outside of the support plate 23. The upper end of the corrugated square tube 30 is connected to the square frame 31. The fourth electric push rods 32 are symmetrically connected to the left and right sides of the rear side of the detection platform 101, and the telescopic rods of the two fourth electric push rods 32 are fixedly connected to the square frame 31.

[0035] When it is necessary to use the detector body 1 to perform transmittance detection on plastic parts, the telescopic rod of the fourth electric push rod 32 can be controlled to extend first. The fourth electric push rod 32 will drive the square frame 31 to move upward. The square frame 31 can pull the upper end of the corrugated square tube 30 to move upward, so that the corrugated square tube 30 extends until the top of the square frame 31 contacts the bottom of the fixed baffle 29. At this time, the corrugated square tube 30 can cover the outside of the support plate 23 and the pressure plate 26, so as to prevent external light from interfering with the detection result of the detector body 1, thereby ensuring the accuracy of the detection result.

[0036] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic parts transmittance detector, comprising a detector body (1), characterized in that: The device also comprises a bearing (2), a mounting plate (3), a support rod (4), a laser emitter (5), a support column (6), a receiver (7) and a lifting assembly. The mounting plate (3) is rotatably mounted on a detection platform (101) of a detector body (1) via the bearing (2). The support rod (4) is connected to the top of the mounting plate (3), and a vertical groove (401) is formed on the side of the support rod (4). The laser emitter (5) is mounted on the upper end of the support rod (4). The support column (6) is connected to the top of the laser emitter (5). A through hole (601) and a guide groove (602) are formed on the support column (6). The through hole (601) and the guide groove (602) are connected to each other, and a laser beam (004) emitted by the laser emitter (5) can vertically pass through the through hole (601). The detection platform (101) of the detection instrument body (1) is also provided with a lifting assembly for driving the receiver (7) to be lifted and lowered, and the receiver (7) is located directly above the laser transmitter (5) and is used to receive the laser beam (004) emitted by the laser transmitter (5); the detection instrument body (1) also includes a connecting plate (19), a second electric push rod (20), a slider (21) and a hollow vertical tube (22), wherein the connecting plate (19) is connected to the side of the support rod (4), the second electric push rod (20) is connected to the connecting plate (19), the slider (21) is connected to the telescopic rod of the second electric push rod (20), and the slider (21) is located in the guide groove (602), and the hollow vertical tube (22) is connected to the side of the slider (21), and the hollow vertical tube (22) is located in the through hole ( 601); the lifting assembly comprises a fixed rod (8), a guide round rod (9), a mounting block (10), a reinforcing rod (11) and a first electric push rod (12); the fixed rod (8) is connected to the top of the mounting plate (3); the guide round rod (9) is slidably connected to the fixed rod (8); the mounting block (10) is connected to the upper end of the guide round rod (9); the reinforcing rod (11) is connected to the side of the mounting block (10); and the end of the reinforcing rod (11) is fixedly connected to the receiver (7); the first electric push rod (12) is connected to the top of the mounting plate (3); and the telescopic rod of the first electric push rod (12) slides through the top of the fixed rod (8) and is connected to the bottom of the mounting block (10); and further comprises a rubber retaining ring (13) and a connecting spring (14); the rubber retaining ring ( The invention also comprises a sliding rod (15), a connecting ring (16), a return spring (17) and a rubber ring (18), wherein the sliding rod (15) is symmetrically slidably connected to the support rod (4), the connecting ring (16) is connected to the upper end of the sliding rod (15), and the connecting ring (16) is sleeved on the outside of the support column (6), the return spring (17) is wound around the outside of the sliding rod (15), and the two ends of the return spring (17) are respectively connected to the top of the support rod (4) and the bottom of the connecting ring (16), and the rubber ring (18) is connected to the top of the connecting ring (16).

2. A plastic parts transmittance detector according to claim 1, characterized in that: The invention also comprises a support plate (23), a guide ring (24), a vertical rod (25), a pressure plate (26), a connecting rod (27) and a third electric push rod (28), wherein the support plate (23) is connected to the top of the detection platform (101) of the detection instrument body (1), the guide ring (24) is symmetrically connected to the detection platform (101) of the detection instrument body (1), the vertical rod (25) is slidably connected in the guide ring (24), the pressure plate (26) is connected to the upper end of the vertical rod (25), and the pressure plate (26) is located directly above the support plate (23), the connecting rod (27) is connected to the lower end of the vertical rod (25), the third electric push rod (28) is symmetrically connected to the inside of the detection platform (101) of the detection instrument body (1), and the telescopic rod of the third electric push rod (28) is fixedly connected to the connecting rod (27).

3. A plastic parts transmittance detector according to claim 2, characterized in that: The invention also comprises a fixed baffle (29), a corrugated square tube (30), a square frame (31) and a fourth electric push rod (32); the fixed baffle (29) is connected to the detector body (1), and the fixed baffle (29) is located directly above the pressure plate (26); the corrugated square tube (30) is connected to the top of the detection platform (101) of the detector body (1), and the corrugated square tube (30) is located outside the support plate (23); the square frame (31) is connected to the upper end of the corrugated square tube (30); the fourth electric push rod (32) is symmetrically connected to the inside of the detection platform (101) of the detector body (1), and the telescopic rod of the fourth electric push rod (32) is fixedly connected to the square frame (31).

4. A plastic parts transmittance detector according to claim 3, characterized in that: The support plate (23) and the pressing plate (26) are both made of optical glass.

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