Search

CN-224231989-U - Hardware missing detection mechanism for plastic products and defective product distinguishing device

CN224231989UCN 224231989 UCN224231989 UCN 224231989UCN-224231989-U

Abstract

The embodiment of the utility model discloses a hardware missing detection mechanism for a plastic product, which comprises a shell, a planar light source, a shooting device and a lens, wherein a first through hole is formed in the center of a wall surface of a detection side of the shell, the planar light source is fixedly arranged on the wall surface of the detection side, the area of the planar light source is larger than or equal to two times of the area of the product to be detected, a second through hole is formed in the center of the planar light source, the shooting device is fixedly arranged in the shell, and the lens of the shooting device sequentially penetrates through the first through hole and the second through hole and is opposite to the product to be detected. The nut on the bottom shell of the LED display screen can be automatically detected through the arrangement of the plane light source and the shooting device, the imaging quality is good, the detection efficiency is greatly improved, the area of the plane light source is larger than or equal to twice the area of a product to be detected, sufficient uniform illumination can be provided, the shooting image is further ensured to be clear, the detection accuracy is improved, the shooting device shoots the product to be detected through the first through hole and the second through hole, and clear product images can be obtained.

Inventors

  • LI CHUANG

Assignees

  • 深圳市鑫立方自动化设备有限公司

Dates

Publication Date
20260512
Application Date
20250627

Claims (9)

  1. 1. A hardware absence detection mechanism for plastic product, its characterized in that includes: a first through hole is formed in the center of the wall surface of the detection side of the shell; the plane light source is fixedly arranged on the wall surface of the detection side, the area is larger than or equal to two times of the area of the product to be detected, and a second through hole is formed in the center; the shooting device is fixedly arranged in the shell, and the lens of the shooting device sequentially passes through the first through hole and the second through hole and is opposite to the product to be detected.
  2. 2. The detection mechanism of claim 1, wherein the planar light source is a uniform illumination light source comprising an array of LEDs.
  3. 3. The inspection mechanism of claim 1 wherein said camera device is an industrial CCD camera having an optical axis perpendicular to the plane of the planar light source.
  4. 4. The detection mechanism according to claim 1, wherein the operating side of the housing is provided with a display below which a cabinet with a mouse and/or keyboard placement cavity is arranged.
  5. 5. The detection mechanism according to claim 4, wherein the display is a touch screen for displaying the detection image and/or the analysis result captured by the capturing device in real time.
  6. 6. The inspection mechanism of claim 4, wherein said housing houses an image processor electrically connected to said camera and said display, respectively, via cables.
  7. 7. The detecting mechanism according to claim 1, wherein the fixing side of the housing is vertically provided with a plurality of mounting holes through which a fixing frame is mounted with a height-adjustable, and the hardware missing detecting mechanism for plastic products is fixed on an external injection molding machine through the fixing frame.
  8. 8. The defective product distinguishing device comprises an injection molding machine, a nut feeding machine for supplying nuts for the injection molding machine, and a manipulator connected with the injection molding machine through signals, and is used for taking and placing products to be detected formed by injection molding, and is characterized by further comprising the hardware missing detection mechanism for plastic products, which is used for any one of claims 1-7, and the detection mechanism is connected with the manipulator through signals.
  9. 9. The defective product distinguishing device of claim 8, wherein the product to be detected is an LED display screen bottom shell after the nut is assembled.

Description

Hardware missing detection mechanism for plastic products and defective product distinguishing device Technical Field The utility model relates to the field of product quality detection equipment, in particular to a hardware missing detection mechanism for plastic products and a defective product distinguishing device. Background With the wide application of LED display screens in various electronic devices, quality control in the production process of the LED display screens is particularly important. In the production process of the LED display screen bottom shell, the nut is used as a key hardware, and the installation quality of the nut directly influences the overall performance and the service life of a product. However, the existing hardware missing detection technology still has some problems, when the in-mold visual detection device is used for detecting a molded product, the detection technology is limited by the closed structure and space constraint of the inner mold cavity of plastic molding equipment (injection molding machine), and the shooting device is forced to adopt an inclined angle for image acquisition and needs to be matched with a corresponding inclined polishing scheme. Such imaging conditions result in: 1. The imaging quality is reduced, and the obtained product image is easy to have defects of distortion, shadow, uneven reflection, fuzzy characteristics and the like. 2. The misjudgment rate is increased, namely the accuracy and the robustness of an image processing algorithm are directly affected by the reduction of the image quality, so that the misjudgment rate of product defects (such as burrs, unfilled materials, stains and the like) or qualified states is obviously increased. 3. The debugging is difficult, because the shooting device and the light source are both positioned in the narrow and inaccessible mold cavity, the on-site debugging and optimizing operation on key parameters such as imaging angle, illumination intensity, illumination angle, focal length and the like are very inconvenient and time-consuming, and the instability and maintenance difficulty of the system are further aggravated. Therefore, there is a need for a hardware missing detection mechanism and defective product distinguishing device for plastic products, so as to improve the stability of the detection result and reduce the complexity of the debugging process. Disclosure of utility model The technical problem to be solved by the embodiment of the utility model is to provide a hardware missing detection mechanism for plastic products, so as to improve the stability of detection results. In order to solve the technical problems, the embodiment of the utility model provides a hardware missing detection mechanism for a plastic product, which comprises a shell, a planar light source, a shooting device and a shooting device, wherein a first through hole is formed in the center of a wall surface of a detection side of the shell, the planar light source is fixedly arranged on the wall surface of the detection side, the area of the planar light source is larger than or equal to two times of the area of a product to be detected, a second through hole is formed in the center of the planar light source, and the shooting device is fixedly arranged in the shell, and a lens of the shooting device sequentially penetrates through the first through hole and the second through hole and is opposite to the product to be detected. Further, the planar light source is a uniform illumination light source formed by an LED array. Further, the photographing device adopts an industrial CCD camera, and the optical axis of the photographing device is perpendicular to the plane where the plane light source is located. Further, a display is arranged on the operation side of the shell, and a cabinet body with a mouse and/or keyboard placing cavity is arranged below the display. Further, the display is a touch screen and is used for displaying the detection image and/or the analysis result shot by the shooting device in real time. Further, an image processor is built in the shell, and the image processor is electrically connected with the shooting device and the display through cables respectively. Further, a plurality of mounting holes are vertically formed in the fixing side of the shell, the fixing frame is mounted through the mounting holes in a height-adjustable mode, and the hardware missing detection mechanism for the plastic products is fixed on an external injection molding machine through the fixing frame. The embodiment of the utility model also provides a defective product distinguishing device which comprises an injection molding machine, a nut feeding machine for supplying nuts for the injection molding machine, a manipulator connected with the injection molding machine through signals and used for taking and placing products to be detected formed by injection molding, and the defective product distinguishing device furthe