A CCD detection device for injection molded parts

Abstract

The application discloses an injection molding part CCD detection device, which comprises a translation driving mechanism, a detection positioning seat, a first CCD module and a second CCD module. The detection positioning seat is installed on the translation driving mechanism and can be driven by the translation driving mechanism to move in a horizontal plane; the detection positioning seat itself comprises a positioning block and a positioning pressing device, which are used for accurately positioning and pressing the injection molding part. The first CCD module is arranged corresponding to the side surface of the injection molding part and is used for detecting the side surface PIN needle, and is equipped with a first light shielding assembly with a first avoiding hole to improve imaging. The second CCD module is arranged corresponding to the top surface of the injection molding part and is used for detecting the top surface PIN needle and the nut, and is also equipped with a second light shielding assembly with a second avoiding hole. The workpiece is sent to the two CCD stations in turn through horizontal translation, and the full-automatic visual detection of multi-directional features can be efficiently and continuously completed under one-time clamping, the structure is compact, and the detection efficiency and precision are effectively improved.

Description

Technical Field

[0001] This application relates to the field of injection molded part inspection equipment, and in particular to a CCD inspection device for injection molded parts. Background Technology

[0002] In modern electronics, automotive, and communications industries, plastic injection molded parts with precision pins and embedded nuts are widely used. These injection molded parts are usually used as connectors or structural components. The quality indicators of these parts, such as the coplanarity and perpendicularity of the pins, whether there is any misalignment or shortage, and the presence and proper installation of the nuts, directly affect the electrical performance and assembly reliability of the final product.

[0003] Currently, quality inspection of such injection molded parts traditionally relies mainly on manual visual inspection. Operators observe the workpieces with the naked eye or with the aid of a magnifying glass. This method has significant drawbacks: First, manual inspection is inefficient and cannot meet the cycle time requirements of large-scale automated production lines, becoming a production bottleneck; second, the inspection results are highly subjective and easily affected by factors such as operator experience and fatigue, leading to high rates of missed inspections and misjudgments, making it difficult to guarantee product quality consistency; third, long-term visual inspection causes significant damage to operators' eyesight, and labor costs are also increasing.

[0004] To overcome the shortcomings of manual inspection, the industry has gradually introduced automated inspection equipment based on machine vision. Existing automated inspection solutions typically use a single industrial camera (CCD) to photograph the workpiece. However, this approach has limitations: because the pins and nuts of injection molded parts are distributed on different surfaces (e.g., sides and top), a single fixed-angle CCD camera cannot capture all the features to be inspected in a single shot. To perform multi-angle inspection with a single camera, it is usually necessary to configure a complex multi-degree-of-freedom robotic arm to grasp and change the workpiece's orientation, or design a precision rotary table to flip the workpiece. This not only makes the equipment structure complex, costly, and space-consuming, but also reduces the inspection cycle time due to the added motion components and introduces the risk of decreased inspection accuracy due to positioning errors and cumulative motion errors. Furthermore, repeated grasping or flipping may also cause accidental damage to the delicate pins. Utility Model Content

[0005] The purpose of this application is to provide a CCD inspection device for injection molded parts that has a simpler, more efficient, and more reliable structure and can simultaneously perform high-precision inspection of multiple surface features of injection molded parts.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A CCD inspection device for injection molded parts includes a translation drive mechanism, an inspection positioning seat, a first CCD module, and a second CCD module. The inspection positioning seat is mounted on the translation drive mechanism and is driven by the translation drive mechanism to move in a horizontal plane. The first CCD module is disposed corresponding to the side of the injection molded part and is used to inspect the pins on the side. The second CCD module is disposed corresponding to the top surface of the injection molded part and is used to inspect the pins and nuts on the top surface.

[0008] Furthermore, the first CCD module also includes a first light-shielding component, which includes a first light-shielding plate and a first light-shielding plate driving device for driving its movement. The first light-shielding plate is provided with a first clearance hole for avoiding the PIN pins on the side of the injection molded part.

[0009] Furthermore, the second CCD module also includes a second light-shielding component, which includes a second light-shielding plate and a second light-shielding plate driving device for driving its movement. The second light-shielding plate is provided with a second clearance hole for avoiding the PIN pins on the surface of the injection molded part.

[0010] Furthermore, the detection positioning seat includes a positioning seat, a positioning block disposed on the positioning seat, and a positioning clamping device. The positioning block is used to position the injection molded part on the positioning seat and to clamp it by the positioning clamping device.

[0011] Furthermore, the positioning and clamping device includes a clamping cylinder, a clamping positioning column, a clamping seat, and a guide seat. The clamping positioning column is mounted on the guide seat, and the clamping cylinder drives the clamping positioning column to clamp the side of the injection molded part onto the clamping seat under the guidance of the guide seat.

[0012] The beneficial effects of this application are as follows:

[0013] This application employs a horizontal translation drive mechanism in conjunction with a detection positioning seat, and sets up a first CCD module and a second CCD module corresponding to the side and top surfaces of the injection molded part, respectively. Through horizontal translation, the injection molded part under test is sequentially moved to the imaging stations of the two CCD modules, thereby efficiently and continuously completing omnidirectional visual inspection of the side pins, top pins, and nuts after a single clamping and positioning. This not only significantly improves inspection efficiency and automation, effectively avoiding the subjectivity and fatigue errors of traditional manual inspection, but also greatly simplifies the equipment structure, reduces manufacturing costs and control difficulty compared to complex multi-angle inspection schemes using robotic arms or rotary tables. Simultaneously, it avoids pin damage that may be caused by repeated gripping or flipping of the workpiece, ensuring the stability of the inspection process and the reliability of the results. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of a CCD inspection device for injection molded parts provided in an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of the structure of a detection positioning seat provided in an embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the structure of a first light-shielding component and a second light-shielding component provided in an embodiment of this application;

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Translation drive mechanism; 2. Detection and positioning seat; 3. First CCD module; 4. Second CCD module; 5. First light-shielding assembly; 6. Second light-shielding assembly;

[0019] 51. First light-shielding plate; 52. First light-shielding plate driving device; 53. First clearance hole;

[0020] 61. Second light-shielding plate; 62. Second light-shielding plate driving device; 63. Second clearance hole;

[0021] 21. Positioning seat; 22. Positioning block; 23. Positioning and clamping device;

[0022] 231. Clamping cylinder; 232. Clamping positioning pin; 233. Clamping seat; 234. Guide seat; Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," etc., are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In particular, the understanding of the term "upper" following a noun in the claims should be understood as meaning that the entire inner and outer surfaces of the structure referred to by the noun conform to the definition of "upper."

[0025] The following detailed description, in conjunction with the accompanying drawings and preferred embodiments, describes the specific implementation methods, structures, features, and effects provided in this application.

[0026] like Figure 1As shown, a CCD inspection device for injection molded parts includes a translation drive mechanism 1, an inspection positioning seat 2, a first CCD module 3, and a second CCD module 4. The inspection positioning seat 2 is mounted on the translation drive mechanism 1 and is driven by the translation drive mechanism 1 to move in a horizontal plane. The first CCD module 3 is arranged corresponding to the side of the injection molded part and is used to inspect the pins on the side. The second CCD module 4 is arranged corresponding to the top surface of the injection molded part and is used to inspect the pins and nuts on the top surface.

[0027] like Figure 3 As shown, the first CCD module 3 further includes a first light-shielding component 5, which includes a first light-shielding plate 51 and a first light-shielding plate driving device 52 for driving its movement. The first light-shielding plate 51 is provided with a first clearance hole 53 for avoiding the PIN pins on the side of the injection molded part.

[0028] like Figure 3 As shown, the second CCD module 4 further includes a second light-shielding component 6, which includes a second light-shielding plate 61 and a second light-shielding plate driving device 62 for driving its movement. The second light-shielding plate 61 is provided with a second clearance hole 63 for avoiding the PIN pins on the surface of the injection molded part.

[0029] like Figure 2 As shown, the detection positioning seat 2 further includes a positioning seat 21, a positioning block 22 disposed on the positioning seat 21, and a positioning clamping device 23. The positioning block 22 is used to position the injection molded part on the positioning seat 21 and to clamp it by the positioning clamping device 23.

[0030] like Figure 2 As shown, the positioning and clamping device 23 further includes a clamping cylinder 231, a clamping positioning column 232, a clamping seat 233, and a guide seat 234. The clamping positioning column 232 is mounted on the guide seat 234. The clamping cylinder 231 drives the clamping positioning column 232 to clamp the side of the injection molded part onto the clamping seat 233 under the guidance of the guide seat 234.

[0031] The working principle of the CCD inspection device for injection molded parts provided in this embodiment of the invention is as follows:

[0032] First, the workpiece is loaded and positioned. The operator or automated robot places the injection molded part to be inspected onto the positioning block 22 of the inspection positioning seat 2, achieving initial positioning of the injection molded part. Then, the positioning clamping device 23 is activated; specifically, the clamping cylinder 231 actuates, driving the clamping positioning column 232 to move downwards (or laterally) under the guidance of the guide seat 234, stably pressing the side of the injection molded part onto the clamping seat 233. This process ensures that the injection molded part is firmly clamped throughout the inspection process, with accurate positioning and no shaking, providing a solid foundation for high-precision visual inspection.

[0033] After clamping is completed, the equipment enters the automatic testing process. The translation drive mechanism 1 (such as a linear motor module or a precision lead screw slide) is activated, driving the entire testing positioning seat 2 and the injection molded part fixed on it to move in the horizontal plane.

[0034] When the injection-molded part is transferred to the first inspection station, the translation drive mechanism 1 pauses. At this station, the first CCD module 3 faces the side of the injection-molded part. To obtain a clear image of the side pins, the first light-shielding assembly 5 starts working: the first light-shielding plate drive device 52 drives the first light-shielding plate to move, so that the first clearance hole 53 on it is precisely fitted into the side pin area of ​​the injection-molded part. The first clearance hole 53 can effectively eliminate interference from other side structures and limit the light from the light source 7 to the pin area, thereby creating an ideal local shooting environment for the first CCD camera. Subsequently, the first CCD camera is triggered to acquire a high-quality image of the side pins and transmit it to an image processing system (such as an industrial control computer) to determine whether there are defects such as missing, skewed, or poor coplanarity of the pins.

[0035] After the side inspection is completed, the translation drive mechanism 1 is restarted, continuing to move the injection molded part to the second inspection station. At this station, the second CCD module 4 faces the top surface of the injection molded part. Similarly, the second light-shielding assembly 6 begins to work: the second light-shielding plate drive device 62 drives the second light-shielding plate to move, so that the second clearance hole 63 on it is precisely fitted into the PIN and nut area on the top surface of the injection molded part. This structure also serves to isolate interference, provide local light shielding, and improve image contrast. Subsequently, the second CCD camera is triggered, synchronously or sequentially acquiring images of the PIN and nut on the top surface, and transmitting them to the image processing system to determine the status of the PIN on the top surface and whether the nut is present and properly installed.

[0036] After the inspection process is completed, the translation drive mechanism 1 can move the inspection positioning seat 2 back to the loading station, the positioning clamping device 23 is released, and the operator or robot arm can remove the inspected workpiece and place a new workpiece to be inspected, and repeat the above process.

[0037] The embodiments described above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A CCD inspection device for injection molded parts, characterized in that: It includes a translation drive mechanism, a detection positioning seat, a first CCD module, and a second CCD module; the detection positioning seat is mounted on the translation drive mechanism and is driven by the translation drive mechanism to move in a horizontal plane; the first CCD module is disposed on the side of the injection molded part and is used to detect the pins on the side; the second CCD module is disposed on the top surface of the injection molded part and is used to detect the pins and nuts on the top surface.

2. The CCD inspection equipment for injection molded parts according to claim 1, characterized in that: The first CCD module further includes a first light-shielding component, which includes a first light-shielding plate and a first light-shielding plate driving device for driving its movement. The first light-shielding plate has a first clearance hole for avoiding the PIN pins on the side of the injection molded part.

3. The CCD inspection equipment for injection molded parts according to claim 1, characterized in that: The second CCD module further includes a second light-shielding component, which includes a second light-shielding plate and a second light-shielding plate driving device for driving its movement. The second light-shielding plate has a second clearance hole for avoiding the PIN pins on the surface of the injection molded part.

4. The CCD inspection equipment for injection molded parts according to claim 1, characterized in that: The detection positioning seat includes a positioning seat, a positioning block disposed on the positioning seat, and a positioning clamping device. The positioning block is used to position the injection molded part on the positioning seat and is clamped by the positioning clamping device.

5. The CCD inspection equipment for injection molded parts according to claim 4, characterized in that: The positioning and clamping device includes a clamping cylinder, a clamping positioning column, a clamping seat, and a guide seat. The clamping positioning column is installed on the guide seat, and the clamping cylinder drives the clamping positioning column to clamp the side of the injection molded part onto the clamping seat under the guidance of the guide seat.

Images