Injection molding part surface defect detection device

Abstract

The invention discloses an injection molding part surface defect detection device, and relates to the technical field of injection molding part detection equipment. The device comprises a detection table, an annular plate is arranged at the top of the detection table, a first visual detection probe is arranged at the top of the annular plate, and a second visual detection probe is arranged at the bottom of the annular plate; and a driving assembly is arranged at the bottom of the annular plate. According to the device, the top first visual detection probe and the bottom second visual detection probe are arranged and are matched with the transparent annular plate and the rotary driving assembly, so that synchronous image collection of the top, the bottom and the side face of the injection molding part is achieved; qualified products and defective products can be automatically and rapidly sorted according to detection results, the detection and sorting efficiency is greatly improved, the angle of the probe can be flexibly adjusted through the supporting assembly, the conveying stability is guaranteed through the centering assembly, the cleanliness of the detection face is kept through the scraper structure, and the detection rate of surface defects and the accuracy of detection data are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the technical field of injection molded part inspection equipment, and in particular relates to a device for detecting surface defects in injection molded parts. Background Technology

[0002] Surface defect inspection of injection molded parts is a critical quality control step in plastic product manufacturing, primarily achieved through real-time identification of surface imperfections using automated vision systems. Common defects include shrinkage marks, flash, porosity, flow lines, and color differences. Traditional methods relying on manual visual inspection are inefficient and prone to missing defects, while modern inspection technologies based on machine vision and deep learning enable high-precision and high-efficiency automated screening. This technology utilizes industrial cameras to acquire images, analyzes and compares them with standard templates using algorithms, and quickly locates and classifies defects, significantly improving production yield and product consistency. It is widely used in precision manufacturing fields such as automotive, electronics, medical, and consumer goods.

[0003] A Chinese patent application (or patent) with publication number CN221224556U discloses a surface defect detection device for injection molded parts, including a worktable and a visual inspection device located on the upper surface of the worktable. A U-shaped support platform is rotatably connected to the upper surface of the worktable. A lead screw is threadedly connected to one side of the U-shaped support platform, and a rotating rod is rotatably connected to the other side of the U-shaped support platform. A bearing is rotatably connected to one end of the lead screw near the rotating rod, and the rotating rod and the lead screw are arranged opposite to each other.

[0004] However, the above-mentioned device still has the following problems during implementation: During the inspection of injection molded parts, the vision probe is fixed to the side, and the injection molded part is rotated to receive the image. However, this method can only acquire images of its side surface, resulting in blind spots for key areas such as the top, bottom, and inner cavity. Since complete multi-angle visual data cannot be obtained, minor defects such as shrinkage marks, air holes, or overflow at the parting line are easily missed. This directly affects the defect detection rate and the accuracy and reliability of the overall inspection results, posing a quality risk.

[0005] To address this issue, we provide a surface defect detection device for injection molded parts. Summary of the Invention

[0006] The purpose of this invention is to provide a surface defect detection device for injection molded parts. Through the structural cooperation of the drive component, guide component, and support component, it solves the problem in the prior art of injection molded part detection equipment that, by setting the vision inspection probe on the side and rotating the injection molded part to take pictures and inspect it, cannot detect other angles of the injection molded part, thus affecting the accuracy of the detection data.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0008] This invention relates to a surface defect detection device for injection molded parts, comprising a detection platform, an annular plate at the top of the detection platform, a first visual inspection probe at the top of the annular plate, and a second visual inspection probe at the bottom of the annular plate; a driving assembly at the bottom of the annular plate, the driving assembly comprising a circular tube mounted on the bottom of the annular plate, a gear ring mounted on the surface of the circular tube, a driving motor mounted on the top of the detection platform, and a first gear mounted on the output end of the driving motor, the driving assembly circulatingly conveying the injection molded parts; and a guiding assembly at the top of the annular plate, the guiding assembly comprising a guide plate mounted on the top of the annular plate. The support plate has a first moving shaft and a second moving shaft movably connected inside the support plate, a push plate and a second gear fixedly connected to the surfaces of the first moving shaft and the second moving shaft, and a toothed plate meshing with one side of the second gear. The injection molded parts are classified after inspection by a guide assembly. The top of the inspection table is provided with a support assembly, which includes a support ring set on the top of the inspection table, a guide rail groove opened inside the support ring, a slider slidably connected inside the guide rail groove, and a positioning pin threaded inside the slider. The shooting angles of the first visual inspection probe and the second visual inspection probe are distributed and fixed by the support assembly.

[0009] The invention is further configured such that a vibrating conveyor plate is fixedly connected to the top of the testing platform, the top output port of the vibrating conveyor plate is connected to a conveying plate, the other end of the conveying plate extends to the top of the annular plate, and the annular plate is made of transparent glass.

[0010] The present invention is further configured such that the guide assembly includes a base movably connected to the surface of the circular tube, a first collection shell and a second collection shell disposed on the top of the base, and a hydraulic rod mounted on the top of the support plate.

[0011] The present invention is further configured such that the bottom of the base is fixedly connected to the testing platform, and the output end of the hydraulic rod is fixedly connected to the toothed plate.

[0012] The present invention is further configured such that an adjusting rod is fixedly connected to one side of both the first visual detection probe and the second visual detection probe, the other end of the adjusting rod is fixedly connected to the slider, and the adjusting rod is slidably connected to the inner wall of the guide rail groove.

[0013] The present invention is further configured such that a bracket is fixedly connected to one side of the support ring, the bottom of the bracket is fixedly connected to the testing platform, and one side of the first gear meshes with the gear ring.

[0014] The present invention is further configured such that a centering component is provided on the top of the annular plate, the centering component including a vertical plate installed on the top of the processing table, a horizontal plate installed on the top of the vertical plate, a fixed shaft movably connected inside the horizontal plate, and a guide block installed at the bottom of the fixed shaft, thereby preventing the injection molded part from shifting during the conveying process.

[0015] The present invention is further configured such that a rotating plate is fixedly connected to the surface of the fixed shaft, and a stabilizing screw is threadedly connected inside the rotating plate.

[0016] The present invention is further configured such that a fixing plate is fixedly connected to one side of the push plate, a scraper is provided at the bottom of the fixing plate, and a limit screw is threadedly connected inside the fixing plate.

[0017] The present invention is further configured such that a sliding rod is slidably connected inside the scraper, the top of the sliding rod is fixedly connected to a fixed plate, a spring is sleeved on the surface of the sliding rod, and the other end of the limiting screw is threadedly connected to the scraper.

[0018] The present invention has the following beneficial effects: By setting a top first visual inspection probe and a bottom second visual inspection probe, in conjunction with a transparent annular plate and a rotary drive assembly, the present invention realizes synchronous image acquisition of the top, bottom and side of the injection molded part. The linkage design of the guide assembly and the classification and collection device can automatically and quickly sort qualified products and defective products according to the inspection results, which greatly improves the inspection and sorting efficiency. The support assembly allows the probe angle to be flexibly adjusted, the centering assembly ensures the stability of the conveying, and the scraper structure keeps the inspection surface clean. The entire device works in concert, which significantly improves the detection rate of surface defects and the accuracy of inspection data.

[0019] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a perspective view of a device for detecting surface defects in injection molded parts.

[0022] Figure 2 This is a schematic diagram showing the connection between the conveyor plate and the annular plate in a surface defect detection device for injection molded parts.

[0023] Figure 3 This is a cross-sectional view of the base in a surface defect detection device for injection molded parts.

[0024] Figure 4 This is a schematic diagram showing the connection between an annular plate, a first visual inspection probe, and a second visual inspection probe in a surface defect detection device for injection molded parts.

[0025] Figure 5 This is a cross-sectional view of a support ring in a surface defect detection device for injection molded parts.

[0026] Figure 6This is a schematic diagram of the central component in a surface defect detection device for injection molded parts.

[0027] Figure 7 This is a schematic diagram of the structure of a guide component in a surface defect detection device for injection molded parts.

[0028] Figure 8 This is a schematic diagram of the connection between the second gear and the toothed plate in a surface defect detection device for injection molded parts.

[0029] Figure 9 This is a schematic diagram showing the connection between the push plate and the scraper in a surface defect detection device for injection molded parts.

[0030] Figure 10 This is a partial cross-sectional view of a scraper in an injection molded part surface defect detection device.

[0031] In the attached diagram: 1. Inspection table; 2. Annular plate; 3. First vision inspection probe; 4. Second vision inspection probe; 5. Drive assembly; 501. Circular tube; 502. Gear ring; 503. Drive motor; 504. First gear; 6. Guide assembly; 601. Support plate; 602. First moving shaft; 603. Second moving shaft; 604. Push plate; 605. Second gear; 606. Gear plate; 7. Support assembly; 701. Support ring; 702. Guide rail groove; 703. 704. Slider; 8. Positioning pin; 9. Vibrating conveyor plate; 607. Base; 608. First collection shell; 609. Second collection shell; 6010. Hydraulic rod; 10. Adjusting rod; 11. Bracket; 12. Centering component; 1201. Vertical plate; 1202. Horizontal plate; 1203. Fixed shaft; 1204. Guide block; 13. Rotating plate; 14. Stabilizing screw; 15. Fixed plate; 16. Scraper; 17. Limiting screw; 18. Slide rod; 19. Spring. Detailed Implementation

[0032] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Please refer to Example 1 Figures 1-10This invention relates to a surface defect detection device for injection molded parts, comprising a detection platform 1, an annular plate 2 at the top of the detection platform 1, a first visual inspection probe 3 at the top of the annular plate 2, and a second visual inspection probe 4 at the bottom of the annular plate 2; a drive assembly 5 at the bottom of the annular plate 2, the drive assembly 5 including a circular tube 501 mounted at the bottom of the annular plate 2, a toothed ring 502 mounted on the surface of the circular tube 501, a drive motor 503 at the top of the detection platform 1, and a first gear 504 mounted at the output end of the drive motor 503, the drive assembly 5 circulates and transports the injection molded parts; a guide assembly 6 at the top of the annular plate 2, the guide assembly 6 including a support plate 601 at the top of the annular plate 2, movably connected to the support plate. The first moving shaft 602 and the second moving shaft 603 inside 601 are fixedly connected to the surfaces of the first moving shaft 602 and the second moving shaft 603, and the push plate 604 and the second gear 605 are fixedly connected to the surfaces of the first moving shaft 602 and the second moving shaft 603. The toothed plate 606 meshes with one side of the second gear 605. The guide assembly 6 sorts the injection molded parts after the inspection is completed. The top of the inspection table 1 is provided with a support assembly 7. The support assembly 7 includes a support ring 701 set on the top of the inspection table 1, a guide rail groove 702 opened in the support ring 701, a slider 703 slidably connected in the guide rail groove 702, and a positioning pin 704 threadedly connected in the slider 703. The shooting angle of the first visual inspection probe 3 and the second visual inspection probe 4 is distributed and fixed by the support assembly 7.

[0034] Specifically: the annular plate 2 serves as the core carrier for conveying and rotating the injection molded part, capable of supporting the part and driving it to rotate smoothly during inspection, facilitating multi-angle imaging. The first visual inspection probe 3 is used to acquire images of the top surface and upper side area of ​​the injection molded part from above, achieving high-definition capture of defects on the upper surface. The second visual inspection probe 4 is used to capture images of the bottom surface and lower side area of ​​the injection molded part from below, comprehensively covering defect detection on the lower surface and bottom edge. The circular tube 501 serves as the connecting and transmission component of the drive assembly 5, transmitting power to the annular plate 2. The gear ring 502 meshes with the first gear 504, transmitting rotational motion to the circular tube 501. The drive motor 503 provides rotational power, controlling the start, stop, and speed of the annular plate 2. The support plate 601 provides mounting and movement support for the push plate 604 and transmission components. The first moving shaft 602 and the second moving shaft 603 rotate within the support plate 601, driving the push plate 604 to achieve a swinging motion. 04 is used to push the injection molded part to detach from the annular plate 2 and enter the corresponding collection container. The second gear 605 meshes with the toothed plate 606, converting linear motion into rotational motion. The toothed plate 606 moves linearly under the drive of the hydraulic rod 6010, driving the second gear 605 to rotate. The injection molded parts after inspection are classified by the guide assembly 6. According to the inspection results, qualified products and defective products are introduced into different collection devices. The support ring 701 provides an annular track for the installation and adjustment of the vision probe. The guide groove 702 serves as the track for the movement of the slider 703, allowing the probe to adjust its position along the annular path. The slider 703 slides in the guide groove 702, driving the adjustment rod 10 and the two sets of vision probes to move. The positioning pin 704 is used to fix the position of the slider 703 in the guide groove 702. The shooting angles of the first vision inspection probe 3 and the second vision inspection probe 4 are distributed and fixed by the support assembly 7. The circumferential position and shooting angle of the probe can be flexibly adjusted according to the shape of the injection molded part and the inspection requirements.

[0035] Please refer to Example 2 Figures 1-10 Based on Embodiment 1, a vibrating conveyor plate 8 is fixedly connected to the top of the detection platform 1. The top output port of the vibrating conveyor plate 8 is connected to a conveyor plate 9. The other end of the conveyor plate 9 extends to the top of the annular plate 2. The annular plate 2 is made of transparent glass. The guide assembly 6 also includes a base 607 movably connected to the surface of the circular tube 501, a first collection shell 608 and a second collection shell 609 set on the top of the base 607, and a hydraulic rod 6010 installed on the top of the support plate 601. The bottom of the base 607 is fixedly connected to the detection platform 1. The output end of the hydraulic rod 6010 is fixedly connected to the toothed plate 606. An adjusting rod 10 is fixedly connected to one side of the first visual detection probe 3 and the second visual detection probe 4. The other end of the adjusting rod 10 is fixedly connected to the slider 703. The adjusting rod 10 is slidably connected to the inner wall of the guide rail groove 702.

[0036] Specifically: the vibrating conveyor plate 8 arranges the randomly stacked injection molded parts in an orderly manner through vibration and outputs them one by one. The conveyor plate 9 smoothly transports the arranged injection molded parts to the entrance position above the annular plate 2, ensuring that the injection molded parts fall accurately into the conveying path of the annular plate 2. The annular plate 2 is made of transparent glass, allowing the bottom vision probe to clearly photograph the lower surface of the injection molded parts through the annular plate 2, while ensuring that the annular plate 2 has sufficient load-bearing strength and wear resistance. The base 607 provides an installation platform for the collection container and can be independently fixed relative to the annular plate 2. The first collection shell 608 is used to collect and inspect... The defective products are collected in the second collection shell 609 to collect the qualified products, realizing automatic sorting. The hydraulic rod 6010 provides linear driving force to push the toothed plate 606 to move, thereby controlling the swing direction and amplitude of the push plate 604. The output end of the hydraulic rod 6010 is fixedly connected to the toothed plate 606, so that the linear motion of the hydraulic rod 6010 is directly transmitted to the toothed plate 606 to control the timing and direction of the push plate 604. The adjusting rod 10 is slidably connected to the inner wall of the guide rail groove 702, so that the probe moves smoothly along the predetermined circular track during the adjustment process, avoiding shaking that affects the shooting accuracy.

[0037] Please refer to Example 3 Figures 1-10 Based on Embodiments 1 and 2, a bracket 11 is fixedly connected to one side of the support ring 701, and the bottom of the bracket 11 is fixedly connected to the testing table 1. One side of the first gear 504 meshes with the gear ring 502. A centering component 12 is provided on the top of the annular plate 2. The centering component 12 includes a vertical plate 1201 installed on the top of the processing table, a horizontal plate 1202 installed on the top of the vertical plate 1201, a fixed shaft 1203 movably connected inside the horizontal plate 1202, and a guide block 1204 installed at the bottom of the fixed shaft 1203. Part 12 prevents the injection molded part from shifting during the conveying process. A rotating plate 13 is fixedly connected to the surface of the fixed shaft 1203. A stabilizing screw 14 is threadedly connected inside the rotating plate 13. A fixed plate 15 is fixedly connected to one side of the push plate 604. A scraper 16 is provided at the bottom of the fixed plate 15. A limit screw 17 is threadedly connected inside the fixed plate 15. A slide rod 18 is slidably connected inside the scraper 16. The top of the slide rod 18 is fixedly connected to the fixed plate 15. A spring 19 is sleeved on the surface of the slide rod 18. The other end of the limit screw 17 is threadedly connected to the scraper 16.

[0038] Specifically: the bracket 11 securely mounts the support ring 701 onto the testing table 1 to prevent vibration or displacement during testing. The vertical plate 1201 provides vertical support for the horizontal plate 1202, which serves as the mounting base for the guide block 1204. The fixed shaft 1203 allows the guide block 1204 to adjust its position within a certain angle. The guide block 1204 guides and limits the injection molded parts during transport, preventing them from shifting or falling off the annular plate 2. The centering component 12 ensures that the injection molded parts remain in the center area of ​​the annular plate 2 during transport, improving the stability and consistency of testing. The rotating plate 13 facilitates manual adjustment of the angle of the guide block 1204 to accommodate injection molded parts of different sizes or shapes. The stabilizing screw 14 is used to lock the rotating plate 13, fixing the angle position of the guide block 1204. To prevent loosening during the inspection process, the fixing plate 15 provides a mounting base for the scraper 16. The scraper 16 is used to clean dust or residual debris from the surface of the annular plate 2, keeping the plate surface clean and avoiding affecting the visual inspection effect. The limiting screw 17 is used to adjust the contact pressure between the scraper 16 and the surface of the annular plate 2, ensuring the scraping effect while avoiding scratching the plate surface. The slide rod 18 guides the scraper 16 to move in the vertical direction, providing a certain floating space. The top of the slide rod 18 is fixedly connected to the fixing plate 15 to ensure the stability of the scraper 16 installation. The spring 19 provides downward elastic pressure to the scraper 16, so that it always fits the surface of the annular plate 2 and adapts to the slight unevenness of the plate surface. The other end of the limiting screw 17 is threadedly connected to the scraper 16. By tightening or loosening the limiting screw 17, the scraper 16 can be fixed by switching.

[0039] The working principle of this invention is as follows: The operator puts the injection molded part to be inspected into the vibrating conveyor plate 8. The vibrating conveyor plate 8 is started to transport the injection molded part. The injection molded part is transported along the conveyor plate 9 to the top of the annular plate 2. The annular plate 2 is made of transparent glass. Then, the drive motor 503 is started. The drive motor 503, together with the first gear 504, drives the gear ring 502 to rotate. The gear ring 502, together with the circular tube 501, drives the annular plate 2 to rotate. The annular plate 2 drives the injection molded part to rotate. When the injection molded part rotates to the top of the second vision inspection probe 4, the bottom of the injection molded part is photographed and inspected by the second vision inspection probe 4. There are three sets of second vision inspection probes 4, which are arranged in an arc along the guide rail groove 702. The three sets of second vision inspection probes 4 can simultaneously photograph and inspect from different angles on the bottom of the injection molded part, thereby improving the accuracy of defect detection data.

[0040] Then, the drive motor 503 continues to drive the ring plate 2 to rotate. When the ring plate 2 drives the injection molded part to the bottom of the first vision inspection probe 3, the top of the injection molded part is photographed and inspected by the second vision inspection probe 4. There are three sets of first vision inspection probes 3, which are arranged in an arc along the guide rail groove 702. The three sets of first vision inspection probes 3 can simultaneously photograph and inspect from different angles on the top of the injection molded part, further improving the accuracy of defect detection data.

[0041] When one of the first visual inspection probes 3 and the second visual inspection probe 4 detects a defect in the injection molded part, the conveying of the vibrating conveyor plate 8 is stopped. Then, the hydraulic rod 6010 is activated. The hydraulic rod 6010, together with the toothed plate 606, drives the two sets of second gears 605 to rotate. The second gears 605, together with the first moving shaft 602 and the second moving shaft 603, synchronously drive the two sets of push plates 604 to rotate. The two sets of push plates 604 rotate outward of the annular plate 2. When the annular plate 2 is rotating and conveying the injection molded part, it can be discharged through the push plates 604 and fall into the first collection shell 608 for collection, thus completing the sorting of defective products.

[0042] After the injection molded parts are inspected and found to be qualified, the hydraulic rod 6010 is activated simultaneously to retract the toothed plate 606. The toothed plate 606 drives the two sets of second gears 605 to rotate in opposite directions, guiding the two sets of push plates 604 to the inside of the annular plate 2, and guiding the qualified products into the second collection shell 609, thus completing the inspection and sorting and improving the inspection efficiency of injection molded parts.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A surface defect detection device for injection molded parts, comprising a detection table (1), characterized in that: The top of the detection platform (1) is provided with an annular plate (2), the top of the annular plate (2) is provided with a first visual detection probe (3), and the bottom of the annular plate (2) is provided with a second visual detection probe (4). The bottom of the annular plate (2) is provided with a drive assembly (5), which includes a circular tube (501) installed at the bottom of the annular plate (2), a toothed ring (502) installed on the surface of the circular tube (501), a drive motor (503) installed on the top of the inspection table (1), and a first gear (504) installed at the output end of the drive motor (503). The injection molded parts are circulated and transported through the drive assembly (5). The top of the annular plate (2) is provided with a guide assembly (6). The guide assembly (6) includes a support plate (601) provided on the top of the annular plate (2), a first moving shaft (602) and a second moving shaft (603) movably connected inside the support plate (601), a push plate (604) and a second gear (605) fixedly connected to the surfaces of the first moving shaft (602) and the second moving shaft (603), and a toothed plate (606) meshing with one side of the second gear (605). The guide assembly (6) is used to classify the injection molded parts after the inspection is completed. The top of the testing platform (1) is provided with a support assembly (7). The support assembly (7) includes a support ring (701) set on the top of the testing platform (1), a guide rail groove (702) opened inside the support ring (701), a slider (703) slidably connected inside the guide rail groove (702), and a positioning pin (704) threadedly connected inside the slider (703). The shooting angles of the first visual detection probe (3) and the second visual detection probe (4) are distributed and fixed by the support assembly (7).

2. The surface defect detection device for injection molded parts according to claim 1, characterized in that: The top of the testing platform (1) is fixedly connected to a vibrating conveyor plate (8), and the top output port of the vibrating conveyor plate (8) is connected to a conveyor plate (9). The other end of the conveyor plate (9) extends to the top of the annular plate (2), and the annular plate (2) is made of transparent glass.

3. The surface defect detection device for injection molded parts according to claim 1, characterized in that: The guide assembly (6) also includes a base (607) movably connected to the surface of the circular tube (501), a first collection shell (608) and a second collection shell (609) disposed on the top of the base (607), and a hydraulic rod (6010) mounted on the top of the support plate (601).

4. The surface defect detection device for injection molded parts according to claim 3, characterized in that: The bottom of the base (607) is fixedly connected to the testing table (1), and the output end of the hydraulic rod (6010) is fixedly connected to the toothed plate (606).

5. The surface defect detection device for injection molded parts according to claim 1, characterized in that: The first visual detection probe (3) and the second visual detection probe (4) are both fixedly connected to one side of an adjustment rod (10), the other end of the adjustment rod (10) is fixedly connected to a slider (703), and the adjustment rod (10) is slidably connected to the inner wall of the guide rail groove (702).

6. The surface defect detection device for injection molded parts according to claim 1, characterized in that: A bracket (11) is fixedly connected to one side of the support ring (701), and the bottom of the bracket (11) is fixedly connected to the testing table (1). The first gear (504) meshes with the gear ring (502) on one side.

7. The surface defect detection device for injection molded parts according to claim 1, characterized in that: The annular plate (2) is provided with a centering component (12) at the top. The centering component (12) includes a vertical plate (1201) installed on the top of the processing table, a horizontal plate (1202) installed on the top of the vertical plate (1201), a fixed shaft (1203) movably connected inside the horizontal plate (1202), and a guide block (1204) installed at the bottom of the fixed shaft (1203). The centering component (12) prevents the injection molded parts from shifting during the conveying process.

8. The surface defect detection device for injection molded parts according to claim 7, characterized in that: A rotating plate (13) is fixedly connected to the surface of the fixed shaft (1203), and a stabilizing screw (14) is threaded inside the rotating plate (13).

9. The surface defect detection device for injection molded parts according to claim 1, characterized in that: A fixing plate (15) is fixedly connected to one side of the push plate (604), and a scraper (16) is provided at the bottom of the fixing plate (15). A limit screw (17) is threadedly connected inside the fixing plate (15).

10. A surface defect detection device for injection molded parts according to claim 9, characterized in that: The scraper (16) is slidably connected to a slide rod (18). The top of the slide rod (18) is fixedly connected to the fixing plate (15). A spring (19) is sleeved on the surface of the slide rod (18). The other end of the limiting screw (17) is threadedly connected to the scraper (16).

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