A visual inspection device for surface defects of injection molded products

Abstract

The application relates to the technical field of visual detection, and discloses a visual detection device for surface defects of injection-molded products, which comprises a fixing frame and a rectangular plastic shell and further comprises a turnover mechanism arranged on the fixing frame, wherein the turnover mechanism comprises a plurality of pushing assemblies, each of the pushing assemblies comprises a rectangular groove arranged in a U-shaped plate, and a limiting spring is fixedly installed on the top inner wall of each of the rectangular grooves. The friction force generated between the rubber semicircular block and the back surface of the rectangular plastic shell can continuously drive the rubber semicircular block to turn over, so that the original bottom surface of the rectangular plastic shell is turned over to the upper side, and the corresponding rubber semicircular block is separated from the rectangular plastic shell. In the process, the intelligent visual detector and the side visual detector can visually detect the original bottom surface and the back surface of the rectangular plastic shell, so that the comprehensive visual detection of the rectangular plastic shell is realized, the defects existing on the rectangular plastic shell can be avoided from being undetected, and the detection quality is improved.

Description

Technical Field

[0001] This invention relates to the field of visual inspection equipment technology, specifically to a visual inspection device for surface defects in injection molded products. Background Technology

[0002] In consumer electronics, smart home, and communication equipment, rectangular plastic housings are common structural components widely used in products such as mobile phones, routers, power adapters, and control panels. These housings are typically manufactured using injection molding, offering advantages such as high production efficiency, good dimensional accuracy, and mass production capability. However, during the injection molding process, factors such as mold surface wear, poor demolding, abnormal raw material moisture content, or uneven cooling shrinkage can easily cause surface defects on the rectangular plastic housings, including scratches, dents, flash, shrinkage, and weld lines. These defects severely impact product yield and brand image.

[0003] Currently, visual inspection devices for rectangular plastic shells still have significant limitations: since rectangular plastic shells are usually placed with the bottom facing down and the back facing backward during transportation, the back and bottom surfaces cannot be directly observed by the camera under normal transportation conditions, forming a blind spot for inspection, making it difficult to detect defects hidden on these two surfaces in a timely manner. Summary of the Invention

[0004] The purpose of this invention is to provide a visual inspection device for surface defects in injection molded products, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a visual inspection device for surface defects in injection molded products, comprising a fixing frame, a visual inspection mechanism, and a rectangular plastic housing, and further comprising: A flipping mechanism is mounted on a fixed frame. The flipping mechanism includes several pushing components. Each pushing component includes a rectangular groove opened in a C-shaped plate. Limiting springs are fixedly installed on the top inner walls of the rectangular grooves. Rectangular sliders are fixedly installed at the bottom ends of the limiting springs. Rubber semicircular blocks are fixedly installed at the bottom of the rectangular sliders. The flipping mechanism is used to flip a rectangular plastic shell during visual inspection. A limiting mechanism is provided, which is set inside a fixed frame. The limiting mechanism includes two C-shaped mounting brackets set inside the fixed frame. Rectangular sliding plates slide through the two C-shaped mounting brackets respectively. Conical blocks are fixedly installed on the sides of the two rectangular sliding plates that are close to each other. The limiting mechanism clamps and stabilizes the rectangular plastic shell through the conical blocks. A dust removal mechanism is provided, which is mounted on a fixed frame. The dust removal mechanism includes a rotating rod rotatably mounted on the right side of the fixed frame. A fan is rotatably mounted on the rotating rod and fixedly connected to the right side of the fixed frame. The dust removal mechanism is used to remove dust and impurities from the surface of a rectangular plastic housing.

[0006] Furthermore, the flipping mechanism also includes two limiting rods disposed within the fixed frame, the rectangular plastic housing being located between the two limiting rods and in contact with the two limiting rods.

[0007] Furthermore, a rotating shaft one is rotatably mounted through the fixed frame, and a rotating shaft two is rotatably mounted on the fixed frame. Transmission wheels are respectively fixedly sleeved on the rotating shaft one and the rotating shaft two.

[0008] Furthermore, an engineering plastic module conveyor belt is fitted onto the two transmission wheels, and several of the C-shaped plates are fixedly connected to the engineering plastic module conveyor belt. A drive motor is fixedly installed on the left side of the fixing frame, and the output shaft of the drive motor is fixedly connected to the rotating shaft.

[0009] Furthermore, the limiting mechanism also includes clamping springs respectively sleeved on two rectangular sliding plates, with the ends of the two clamping springs that are far apart from each other being fixedly connected to two C-shaped mounting brackets, and the ends of the two clamping springs that are close to each other being fixedly connected to two conical blocks.

[0010] Furthermore, a conveyor plate is fixedly installed on the bottom inner wall of the fixed frame, and a U-shaped limiting rod is fixedly installed on the top of the conveyor plate. The rectangular plastic shell is located on the top of the conveyor plate.

[0011] Furthermore, two sets of strip-shaped slide plates are slidably installed on the conveyor plate, with each set of strip-shaped slide plates in pairs. A bidirectional threaded rod is threaded through each set of strip-shaped slide plates, and a collection box is fixedly installed on the back of the fixing frame.

[0012] Furthermore, the dust removal mechanism also includes a large gear fixedly sleeved on a rotating shaft, and a small gear fixedly sleeved on the rotating rod, with the large gear meshing with the small gear.

[0013] Furthermore, an air outlet pipe is fixedly installed on the left side of the fan, a mounting bracket is fixedly installed on the mounting frame, a front air outlet cover is fixedly installed on the top inner wall of the mounting bracket, two horizontal air outlet covers are fixedly installed on the front air outlet cover, and the top end of the air outlet pipe communicates with the front air outlet cover.

[0014] Furthermore, an inverted bracket is fixedly installed on the fixed frame, and the visual inspection mechanism includes a visual detector fixedly installed on the top of the inverted bracket. Lateral visual detectors are fixedly installed on the left and right sides of the inverted bracket, respectively.

[0015] The present invention has the following beneficial effects: (1) The present invention provides a visual inspection device for surface defects of injection molded products. During the movement of a rectangular plastic shell, a side visual detector and an intelligent visual detector perform visual inspection of defects on the moving rectangular plastic shell. The covered surfaces include the top surface of the front of the rectangular plastic shell and the left and right sides. When the rectangular plastic shell contacts the U-shaped limiting rod below the middle surface, due to the pushing force of the rubber semicircular block at the upper middle of the back surface, the rectangular plastic shell will rotate around the U-shaped limiting rod as an axis, flipping the back of the rectangular plastic shell to the top. When the back of the rectangular plastic shell is flipped to the top, the bottom of the corresponding rubber semicircular block will contact the back surface, and the rectangular plastic... When the shell is upright, the rubber semicircular block rises, causing the rectangular slider to rise as well. The corresponding limit spring will compress and deform. As the rubber semicircular block continues to move, the friction between the rubber semicircular block and the back of the rectangular plastic shell will continue to cause the rubber semicircular block to flip, turning the original bottom surface of the rectangular plastic shell to the top. The corresponding rubber semicircular block will then leave the rectangular plastic shell. During this process, both the intelligent vision detector and the side vision detector will perform visual inspection on the original bottom and back surfaces of the rectangular plastic shell, thus performing a comprehensive visual inspection of the rectangular plastic shell. This ensures that defects on the rectangular plastic shell are not missed and improves the quality of inspection.

[0016] (2) In the present invention, a visual inspection device for surface defects of injection molded products is provided. When the rectangular plastic shell moves and contacts the U-shaped limiting rod, the corresponding rectangular plastic shell will contact the protruding point of the conical block. Under the compression of the rectangular plastic shell, the conical block will move towards the U-shaped mounting bracket. The conical block drives the rectangular sliding plate to move. At this time, the clamping spring will undergo compression deformation. When the two conical blocks clamp the rectangular plastic shell together, the rectangular plastic shell is flipped to ensure its stability during flipping, preventing the rectangular plastic shell from flipping out of the limiting rod and falling out. At the same time, it also prevents the rubber from being compressed. If the rubber semicircular block moves too fast, the rectangular plastic shell will fly out directly. To ensure the safety of the flip, after the side vision detector and the intelligent vision detector fully inspect the flipped rectangular plastic shell, the rubber semicircular block that initially contacts the rectangular plastic shell will move to the front of the rectangular plastic shell. During the continuous operation of several C-shaped plates, the C-shaped plates behind will push away the rectangular plastic shells that have been inspected before, and finally fall into the collection box for collection. If the rectangular plastic shell is found to be defective, the intelligent vision detector will issue an alarm prompt to remove the defective rectangular plastic shell.

[0017] (3) The present invention provides a visual inspection device for surface defects of injection molded products. In use, a rectangular plastic shell is placed in front of the corresponding C-shaped plate. Then, the drive motor is started, causing the rotating shaft to rotate. Under the action of the transmission wheel and the engineering plastic module conveyor belt, the engineering plastic module conveyor belt will drive several C-shaped plates to move synchronously along the conveyor belt. The C-shaped plates will drive the limiting spring, rectangular slider, and rubber semicircular block to move synchronously. The rubber semicircular block will contact the rectangular plastic shell during the movement and, under the limiting action of the limiting rod, will drive the rectangular plastic shell to move towards the collection box. When the rubber semicircular block pushes the rectangular plastic shell that has just been placed on the conveyor plate, the rotating shaft will rotate... The large gear rotates, and with the cooperation of the large and small gears, the rotating rod rotates synchronously. The rotating rod drives the fan to rotate, generating airflow. The airflow enters the front and side air hoods through the air outlet pipe. The front and side air hoods blow air onto the moving rectangular plastic shell, removing dust and impurities from the front, top, and sides of the rectangular plastic shell. This prevents dust and impurities from remaining on the surface of the rectangular plastic shell and causing misjudgments of defects. During the blowing process, the limiting rod and rubber semicircular block limit the rectangular plastic shell, preventing the rectangular plastic shell from shifting due to excessive airflow. This allows the intelligent vision detector and the side vision detector to stably detect the rectangular plastic shell.

[0018] 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

[0019] 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. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front part of the structure of the present invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of A in the middle; Figure 4 This is a schematic cross-sectional view of the rear portion of the present invention; Figure 5 For the present invention Figure 4 A magnified structural diagram of B in the diagram; Figure 6 For the present invention Figure 2 A magnified structural diagram of C; Figure 7 For the present invention Figure 4 A magnified structural diagram of D in the diagram; Figure 8 This is a schematic cross-sectional view of the internal structure of the present invention.

[0021] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Fixing frame; 105. Limiting rod; 106. Rectangular plastic housing; 107. Rotating shaft one; 108. Rotating shaft two; 109. Transmission wheel; 110. Engineering plastic module conveyor belt; 111. Drive motor; 112. C-shaped plate; 113. Rectangular groove; 114. Limiting spring; 115. Rectangular slider; 116. Rubber semicircular block; 2. C-shaped mounting bracket; 201. Rectangular sliding plate; 202. Conical block; 203. 1. Clamping spring; 204. Conveyor plate; 205. C-shaped limit rod; 206. Strip slide plate; 207. Bidirectional threaded rod; 208. Collection box; 3. Rotating rod; 301. Large gear; 302. Small gear; 303. Fan; 304. Air outlet duct; 305. Mounting bracket; 306. Front air outlet hood; 307. Horizontal air outlet hood; 308. C-shaped fixing bracket; 309. Intelligent vision detector; 310. Side vision detector. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-8 As shown, the present invention is a visual inspection device for surface defects of injection molded products, including a fixing frame 1 and a rectangular plastic housing 106, and further comprising: A flipping mechanism is mounted on a fixed frame 1. The flipping mechanism includes several pushing components, each comprising a rectangular groove 113 formed within a U-shaped plate 112. Limit springs 114 are fixedly installed on the top inner walls of each rectangular groove 113. Rectangular sliders 115 are fixedly installed at the bottom ends of each limit spring 114. Rubber semicircular blocks 116 are fixedly installed at the bottom of each rectangular slider 115. The flipping mechanism is used to flip the rectangular plastic housing 106 during visual inspection. The flipping mechanism also includes two limiting rods 105 mounted within the fixed frame 1. The rectangular plastic housing 106 is positioned... Between the two limiting rods 105, the rectangular plastic shell 106 contacts the two limiting rods 105; a rotating shaft 107 is rotatably mounted through the fixed frame 1, and a rotating shaft 108 is rotatably mounted on the fixed frame 1. Transmission wheels 109 are fixedly sleeved on the rotating shaft 107 and the rotating shaft 108 respectively; an engineering plastic module conveyor belt 110 is sleeved on the two transmission wheels 109, and several C-shaped plates 112 are fixedly connected to the engineering plastic module conveyor belt 110. A drive motor 111 is fixedly mounted on the left side of the fixed frame 1, and the output shaft of the drive motor 111 is fixedly connected to the rotating shaft 107.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a limiting mechanism is installed within the fixed frame 1. The limiting mechanism includes two C-shaped mounting brackets 2 installed within the fixed frame 1. Rectangular sliding plates 201 slide through each of the two C-shaped mounting brackets 2. Conical blocks 202 are fixedly installed on the sides of the two rectangular sliding plates 201 that are close to each other. The limiting mechanism clamps and stabilizes the rectangular plastic shell 106 using the conical blocks 202. The limiting mechanism also includes clamping springs 203 respectively sleeved on the two rectangular sliding plates 201. The ends of the two clamping springs 203 that are far apart from each other are respectively connected to the two C-shaped mounting brackets 201. The frame 2 is fixedly connected, and the two clamping springs 203 are fixedly connected to the two conical blocks 202 at their close ends respectively; a conveyor plate 204 is fixedly installed on the bottom inner wall of the fixed frame 1, and a U-shaped limiting rod 205 is fixedly installed on the top of the conveyor plate 204. A rectangular plastic shell 106 is located on the top of the conveyor plate 204; two sets of strip slide plates 206 are slidably installed on the conveyor plate 204, with the strip slide plates 206 in pairs. Two sets of bidirectional threaded rods 207 are threaded through the two sets of strip slide plates 206 respectively. A collection box 208 is fixedly installed on the back of the fixed frame 1.

[0025] When the rectangular plastic housing 106 moves and contacts the C-shaped limiting rod 205, the corresponding rectangular plastic housing 106 will contact the protruding dot of the conical block 202. Under the compression of the rectangular plastic housing 106, the conical block 202 will move closer to the C-shaped mounting bracket 2. The conical block 202 drives the rectangular slide plate 201 to move. At this time, the clamping spring 203 will undergo compression deformation. When the two conical blocks 202 clamp the rectangular plastic housing 106 together, the rectangular plastic housing 106 is ensured to be stable when it is flipped, preventing the rectangular plastic housing 106 from falling out of the limiting rod 105. At the same time, it also prevents the rectangular plastic housing 106 from flying out directly due to the excessive speed of the rubber semicircular block 116, thus ensuring the safety of the flipping.

[0026] like Figure 1 , Figure 4 , Figure 7 and Figure 8 As shown, a dust removal mechanism is mounted on a fixed frame 1. The dust removal mechanism includes a rotating rod 3 rotatably mounted on the right side of the fixed frame 1, with a fan 303 rotatably sleeved on the rotating rod 3. The fan 303 is fixedly connected to the right side of the fixed frame 1. The dust removal mechanism is used to remove dust and impurities from the surface of the rectangular plastic housing 106. The dust removal mechanism also includes a large gear 301 fixedly sleeved on a rotating shaft 107, and a small gear 302 fixedly sleeved on the rotating rod 3. The large gear 301 and the small gear 302 mesh with each other. A fan 303 is fixedly mounted on the left side. The air outlet duct 304 is fixedly mounted on the mounting bracket 1. A front air outlet hood 306 is fixedly mounted on the top inner wall of the mounting bracket 305. Two horizontal air outlet hoods 307 are fixedly mounted on the front air outlet hood 306. The top end of the air outlet duct 304 communicates with the front air outlet hood 306. A C-shaped mounting bracket 308 is fixedly mounted on the mounting bracket 1. An intelligent vision detector 309 is fixedly mounted on the top of the C-shaped mounting bracket 308. Side vision detectors 310 are fixedly mounted on the left and right sides of the C-shaped mounting bracket 308, respectively.

[0027] The rotation of the rotating shaft 107 drives the large gear 301 to rotate. With the cooperation of the large gear 301 and the small gear 302, the rotating rod 3 will rotate synchronously. The rotating rod 3 will drive the fan 303 to rotate and generate airflow. The airflow will enter the front air outlet shroud 306 and the horizontal air outlet shroud 307 through the air outlet pipe 304. The front air outlet shroud 306 and the horizontal air outlet shroud 307 will blow air onto the moving rectangular plastic shell 106, blowing away dust and impurities on the front, top and sides of the rectangular plastic shell 106, thereby avoiding dust and impurities remaining on the surface of the rectangular plastic shell 106 and causing misjudgment of defects. During the blowing process, the limiting rod 105 and the rubber semicircular block 116 will limit the rectangular plastic shell 106, thereby preventing the rectangular plastic shell 106 from shifting due to excessive airflow, allowing the intelligent vision detector 309 and the side vision detector 310 to stably detect the rectangular plastic shell 106.

[0028] Working principle: In use, the rectangular plastic housing 106 is placed in front of the corresponding C-shaped plate 112, and then the drive motor 111 is started. The drive motor 111 drives the rotating shaft 107 to rotate. Under the action of the transmission wheel 109 and the engineering plastic module conveyor belt 110, the engineering plastic module conveyor belt 110 will drive several C-shaped plates 112 to move synchronously along the engineering plastic module conveyor belt 110. The C-shaped plates 112 will drive the limiting spring 114, the rectangular slider 115 and the rubber semicircular block 116 to move synchronously. The rubber semicircular block 116 will contact the rectangular plastic housing 106 during the movement, and under the limiting action of the limiting rod 105, it will drive the rectangular plastic housing 106 to move synchronously. 106 moves toward the collection box 208. When the rubber semicircular block 116 pushes the rectangular plastic shell 106 that has just been placed on the conveyor plate 204, the rotating shaft 107 rotates and drives the large gear 301 to rotate. With the cooperation of the large gear 301 and the small gear 302, the rotating rod 3 will rotate synchronously. The rotating rod 3 will drive the fan 303 to rotate and generate airflow. The airflow will enter the front air outlet hood 306 and the horizontal air outlet hood 307 through the air outlet pipe 304. The corresponding front air outlet hood 306 and the horizontal air outlet hood 307 will blow air onto the moving rectangular plastic shell 106, blowing away the dust and impurities on the front, top and sides of the rectangular plastic shell 106. During the movement of the rectangular plastic housing 106, the side vision detector 310 and the intelligent vision detector 309 perform defect visual inspection on the moving rectangular plastic housing 106. The covered surfaces include the top front surface and the left and right sides of the rectangular plastic housing 106. When the rectangular plastic housing 106 contacts the U-shaped limiting rod 205 below its middle surface, due to the pushing force of the rubber semicircular block 116 on the upper middle of the back surface, the rectangular plastic housing 106 will rotate around the U-shaped limiting rod 205 as an axis, flipping the back surface of the rectangular plastic housing 106 to the top. When the back surface of the rectangular plastic housing 106 is flipped to the top, the bottom of the corresponding rubber semicircular block 116 will contact... When the rectangular plastic shell 106 is upright, the rubber semicircular block 116 will rise, and the rubber semicircular block 116 will drive the rectangular slider 115 to rise. The corresponding limit spring 114 will be compressed and deformed. As the rubber semicircular block 116 continues to move, the friction between the rubber semicircular block 116 and the back of the rectangular plastic shell 106 will continue to drive the rubber semicircular block 116 to flip, flipping the original bottom surface of the rectangular plastic shell 106 to the top. The corresponding rubber semicircular block 116 will leave the rectangular plastic shell 106. During this process, the intelligent vision detector 309 and the side vision detector 310 will both perform visual detection on the original bottom and back surfaces of the rectangular plastic shell 106. When the rectangular plastic housing 106 moves and contacts the U-shaped limiting rod 205, the corresponding rectangular plastic housing 106 will contact the protruding dot of the conical block 202. Under the compression of the rectangular plastic housing 106, the conical block 202 will move closer to the U-shaped mounting bracket 2. The conical block 202 drives the rectangular sliding plate 201 to move. At this time, the clamping spring 203 will undergo compression deformation. After the two conical blocks 202 jointly clamp the rectangular plastic housing 106, the side vision detector 310 cooperates with intelligent vision detection. The device 309 performs a comprehensive inspection on the flipped rectangular plastic shell 106. The rubber semicircular block 116 that initially contacts the rectangular plastic shell 106 will move forward. During the continuous operation of several C-shaped plates 112, the later C-shaped plates 112 will push away the previously inspected rectangular plastic shells 106 during the movement, and finally fall into the collection box 208 for collection. If the rectangular plastic shell 106 is found to be defective and unqualified, the intelligent vision detector 309 will issue an alarm prompt to remove the unqualified rectangular plastic shell 106.

[0029] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A visual inspection device for surface defects of injection molded products, comprising a fixed frame (1), a visual inspection mechanism and a rectangular plastic housing (106), characterized in that, Also includes: A flipping mechanism is provided on a fixed frame (1). The flipping mechanism includes several pushing components. Each pushing component includes a rectangular groove (113) opened in a rectangular plate (112). Limiting springs (114) are fixedly installed on the top inner walls of the rectangular grooves (113). Rectangular sliders (115) are fixedly installed at the bottom ends of the limiting springs (114). Rubber semicircular blocks (116) are fixedly installed at the bottom of the rectangular sliders (115). The flipping mechanism is used to flip the rectangular plastic shell (106) during visual inspection. The limiting mechanism is set inside the fixed frame (1). The limiting mechanism includes two C-shaped mounting brackets (2) set inside the fixed frame (1). Rectangular sliding plates (201) slide through the two C-shaped mounting brackets (2). Conical blocks (202) are fixedly installed on the side of the two rectangular sliding plates (201) that are close to each other. The limiting mechanism clamps and stabilizes the rectangular plastic shell (106) through the conical blocks (202). The dust removal mechanism is set on the fixed frame (1). The dust removal mechanism includes a rotating rod (3) rotatably installed on the right side of the fixed frame (1). A fan (303) is rotatably sleeved on the rotating rod (3). The fan (303) is fixedly connected to the right side of the fixed frame (1). The dust removal mechanism is used to remove dust and impurities from the surface of the rectangular plastic shell (106). A conveyor plate (204) is fixedly installed on the bottom inner wall of the fixed frame (1), and a U-shaped limiting rod (205) is fixedly installed on the top of the conveyor plate (204). The rectangular plastic shell (106) is located on the top of the conveyor plate (204).

2. The injection product surface defect visual detection device according to claim 1, characterized in that: The flipping mechanism also includes two limiting rods (105) disposed in the fixed frame (1), the rectangular plastic shell (106) is located between the two limiting rods (105), and the rectangular plastic shell (106) is in contact with the two limiting rods (105).

3. The injection product surface defect visual detection device according to claim 1, characterized in that: A rotating shaft one (107) is rotatably mounted through the fixed frame (1), and a rotating shaft two (108) is rotatably mounted on the fixed frame (1). A transmission wheel (109) is fixedly sleeved on the rotating shaft one (107) and the rotating shaft two (108).

4. The injection product surface defect visual inspection device according to claim 3, characterized in that: Engineering plastic module conveyor belt (110) is fitted on the two drive wheels (109), and several C-shaped plates (112) are fixedly connected to the engineering plastic module conveyor belt (110). A drive motor (111) is fixedly installed on the left side of the fixed frame (1), and the output shaft of the drive motor (111) is fixedly connected to the rotating shaft (107).

5. The visual inspection device for surface defects of injection molded products according to claim 1, characterized in that: The limiting mechanism also includes clamping springs (203) respectively sleeved on two rectangular sliding plates (201). The ends of the two clamping springs (203) that are far apart from each other are respectively fixedly connected to two C-shaped mounting brackets (2), and the ends of the two clamping springs (203) that are close to each other are respectively fixedly connected to two conical blocks (202).

6. The visual inspection device for surface defects of injection molded products according to claim 1, characterized in that: Two sets of strip slide plates (206) are slidably installed on the conveyor plate (204). The strip slide plates (206) are in pairs. Two sets of strip slide plates (206) are respectively threaded with bidirectional threaded rods (207). A collection box (208) is fixedly installed on the back of the fixing frame (1).

7. The visual inspection device for surface defects of injection molded products according to claim 2, characterized in that: The dust removal mechanism also includes a large gear (301) fixedly sleeved on the rotating shaft (107), and a small gear (302) fixedly sleeved on the rotating rod (3), wherein the large gear (301) and the small gear (302) mesh with each other.

8. The visual inspection device for surface defects of injection molded products according to claim 1, characterized in that: An air outlet pipe (304) is fixedly installed on the left side of the fan (303). A mounting bracket (305) is fixedly installed on the mounting bracket (1). A front air outlet cover (306) is fixedly installed on the inner top wall of the mounting bracket (305). Two horizontal air outlet covers (307) are fixedly installed on the front air outlet cover (306). The top end of the air outlet pipe (304) is connected to the front air outlet cover (306).

9. The visual inspection device for surface defects of injection molded products according to claim 1, characterized in that: A U-shaped fixing frame (308) is fixedly installed on the fixing frame (1). The visual inspection mechanism includes a visual detector (309) fixedly installed on the top of the U-shaped fixing frame (308). Side visual detectors (310) are fixedly installed on the left and right sides of the U-shaped fixing frame (308), respectively.

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