Film production detection device
The optical rangefinder detects the deformation of the film, combined with the seal strip and film roller design, solves the problem of temperature-affected existing film detection devices, and achieves accurate hole detection without changing the environment.
Patent Information
- Application Number
- CN202422367039.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-27
AI Technical Summary
Existing plastic film detection devices are susceptible to temperature, resulting in inaccurate measurement results of infrared spectrometers.
An optical rangefinder is used to detect the deformation of the film. By detecting the deformation of the film when the box and the air intake box are clamped, the optical rangefinder is used to detect the change in the distance between the film and the detection box to judge the existence of the hole. Combined with the sealing strip to improve the airtightness and the film roller to control the film tension, ensuring the accuracy of the detection.
Accurate hole detection without being affected by ambient temperature is achieved, and the reliability and efficiency of the detection results are improved.
Smart Images
Figure CN223217394U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of film detection, in particular to a film production detection device. Background Art
[0002] Films are made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, and are often used for packaging and as coating layers. Before use, plastic films usually need to be inspected for holes. Existing plastic film inspection devices, such as scanning infrared spectrometers, indirectly reflect the film's hole conditions by measuring changes in the film's absorbance and reflectance. If there are holes in the film, the film's absorbance and reflectance will change. However, the infrared spectrometer may be affected by temperature when measuring film holes. Increased temperature will cause thermal expansion of the film, which will also cause changes in the film's absorbance and reflectance, thereby affecting the infrared spectrometer's measurement results. Utility Model Content
[0003] The purpose of the present invention is to provide a film production detection device to overcome the above-mentioned defects in the prior art.
[0004] According to the utility model, a film production detection device includes a detection table, an air intake box is fixed on the top surface of the detection table, an air pump is connected to the side wall of the air intake box, a liftable detection box is provided on the upper side of the air intake box, the detection box is hollow inside the air intake box and the opening of the cavity is opposite to the film, the film is transported between the air intake box and the detection box, the size of the film is larger than the detection box and the size of the cavity opening of the air intake box, the detection box and the air intake box can clamp the film, and an optical rangefinder for detecting the deformation of the film is provided in the detection box.
[0005] Through the above technical solution, when the detection box and the air intake box clamp the film, if there is a hole on the film, the film will first bulge upward and then return to flatness. The optical rangefinder detects the decrease in distance from the film and thus determines whether there is a hole on the film. This detection method is not easily affected by the environment and the detection results are more accurate.
[0006] The present invention is further configured as follows: a first sealing strip is fixed to the lower end surface of the detection box, and the first sealing strip is arranged around the lower end surface.
[0007] Through the above technical solution, the circle of sealing strips provided on the detection box is conducive to enhancing the airtightness of the detection box and reducing the interference of external air on the detection results.
[0008] The utility model is further configured as follows: a second sealing strip is fixed to the upper end surface of the air intake box, the second sealing strip is opposite to the first sealing strip and the cross sections of the two sealing strips are consistent.
[0009] Through the above technical solution, the upper and lower sealing strips are aligned and have the same cross-section, which is conducive to ensuring good air tightness of the air intake box and the test box when the film is clamped, making the test results more accurate.
[0010] The utility model is further configured as follows: the optical distance meter is located in the middle of the top surface inside the detection box, and the optical distance meter is directly opposite to the film.
[0011] Through the above technical solution, the optical rangefinder is installed at the position where the film deformation is the largest, which can better capture the deformation trend of the film and improve the detection sensitivity of the optical rangefinder.
[0012] The utility model is further configured as follows: a display light is installed on the side of the detection box, and the display light is circuit-connected with the optical rangefinder.
[0013] Through the above technical solution, the optical rangefinder sends a light-up signal to the display light after detecting that the distance to the film is reduced. The lighting of the display light can more intuitively indicate whether there are holes in the film, thereby improving the detection efficiency of the detection device.
[0014] The utility model is further configured as follows: film rollers are provided on both sides of the detection box, and the film is rolled up on the film roller on one side.
[0015] Through the above technical solution, the film is transmitted through the film roller, which can accurately control the tension of the film, ensure the flatness and stability of the film during the transmission process, reduce the possibility of wrinkles in the film during transmission, and improve the accuracy of the detection data.
[0016] The utility model is further configured as follows: cylinders are fixed on both sides of the upper side of the air inlet box, the cylinders are located on the outside of the second sealing strip, and the cylinders can control the detection box to rise and fall at a uniform speed.
[0017] Through the above technical solution, the detection box is raised and lowered at a uniform speed by the cylinder to ensure that the detection box and the air inlet box are slowly buckled and clamped to the film, thereby reducing the risk of creases on the film caused by the device during clamping.
[0018] The beneficial effects of the present invention are as follows: if there is no hole on the film, the film will bulge upward, and the distance between the film and the optical rangefinder will decrease; if there is a hole on the film, the film will first bulge upward and then return to being flat, and the distance between the film and the optical rangefinder will first decrease and then increase. The optical rangefinder determines whether there is a hole on the film by detecting the increase in the distance between the film and the film. This detection method is not easily affected by the environment and the detection result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural diagram of the utility model;
[0020] Figure 2 This is a diagram of the detection box of the utility model being opened;
[0021] Figure 3 This is a schematic diagram of the air intake box structure of the utility model;
[0022] Figure 4 This is a closed diagram of the detection box of the present utility model;
[0023] Figure 5 This is a schematic diagram of the structure of the detection box of the utility model;
[0024] Figure 6 It is a schematic diagram of the internal structure of the detection box of the utility model.
[0025] In the figure: 1. test table; 2. test box; 201. first sealing strip; 202. optical rangefinder; 3. air inlet box; 301. second sealing strip; 4. air pump; 5. air cylinder; 6. display light; 7. film roller. DETAILED DESCRIPTION
[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the purpose of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.
[0027] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is merely used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the specific claims of the present invention. As used herein, the terms up, down, and left, right, and right are not limited to their strict geometric definitions, but include reasonable tolerances for machining or human errors and inconsistencies. The specific features of the thin film production detection device are described in detail below:
[0028] An embodiment of the present invention:
[0029] Reference Figures 1-6The utility model provides a film production detection device, including a detection table 1, an air intake box 3 is fixed on the top surface of the detection table 1, and cylinders 5 are fixed on both sides of the upper side of the air intake box 3. The side walls of the air intake box 3 are connected to an air pump 4, and a detection box 2 is provided on the upper side of the air intake box 3. The detection box 2 is lifted and lowered by the connection with the cylinder 5. The detection box 2 is hollow inside the air intake box 3 and the opening of the cavity is opposite to the film. The film is transported between the air intake box 3 and the detection box 2. An optical rangefinder 202 for detecting the deformation amount of the film is provided in the detection box 2, and a display light 6 is installed on the side of the detection box 2. The display light 6 is circuit-connected with the optical rangefinder 202. Film rollers 7 are provided on both sides of the detection box 2, and the film is rolled up on the film roller 7 on one side.
[0030] Reference Figure 1 、 Figure 4 The size of the film is larger than the cavity opening size of the detection box 2 and the air intake box 3, and the detection box 2 and the air intake box 3 can clamp the film.
[0031] Reference Figure 3-Figure 5 A first sealing strip 201 is fixed to the lower end face of the detection box 2, and the first sealing strip 201 is arranged in a circle along the lower end face. A second sealing strip 301 is fixed to the upper end face of the air intake box 3, and the second sealing strip 301 is opposite to the first sealing strip 201 and the cross-sections of the two sealing strips are consistent, ensuring that the air intake box 3 and the detection box 2 have good air tightness when clamping the film, making the detection results more accurate.
[0032] Reference Figure 5 、 Figure 6 The optical rangefinder 202 is located in the middle of the top surface of the detection box 2. The optical rangefinder 202 is facing the film. The position where the optical rangefinder 202 is installed is facing the point where the deformation of the film is the largest. This can better capture the deformation trend of the film and improve the detection sensitivity of the optical rangefinder 202.
[0033] Reference Figure 6 An optical rangefinder 202, a power supply and a signal switch are provided in the detection box 2. The optical rangefinder 202 is connected to the power supply, the signal switch and the display light 6 through wires.
[0034] The film is tightly wound on the film roller 7 on one side, and the roller on the other side rewinds the film by the rotation of the motor. During the rewinding process, the film is flattened and passes between the air inlet box 3 and the detection box 2. After the detection box 2 and the air inlet box 3 clamp the film, the air pump 4 delivers a certain amount of air into the air inlet box 3. The film undergoes elastic deformation and bulges under the action of the air pressure below, which can be restored to its original shape. If there are no holes on the film, the film will bulge upward due to the increase in the lower air pressure. At this time, the optical rangefinder 202 detects that the distance to the film is reduced. If there are holes on the film, the air will Air flows into the detection box 2 from the hole in the film, and the air pressure on the upper and lower sides of the film gradually balances. The film will first bulge upward and then return to being flat. The optical rangefinder 202 detects that the distance to the film first decreases and then increases. When the optical rangefinder 202 detects that the distance to the film increases, it sends a closing signal to the signal switch. After the signal switch is closed, the circuit between the optical rangefinder 202 and the display light 6 is connected, and the display light 6 lights up, indicating that there is a hole in this section of the film, thereby judging the presence of a hole in the film.
[0035] It will be clear to those skilled in the art that various modifications to the above embodiments may be made without departing from the overall spirit and concept of the present invention. All such modifications fall within the scope of protection of the present invention. The protection scheme of the present invention shall be subject to the claims appended hereto.
Claims
1. A film production detection device, comprising a detection table (1), characterized in that: An air intake box (3) is fixed on the top surface of the test bench (1), and an air pump (4) is provided on the side wall of the air intake box (3). A liftable test box (2) is provided on the upper side of the air intake box (3). The test box (2) and the air intake box (3) are hollow and the opening of the cavity is directly opposite. A film is transported between the air intake box (3) and the test box (2). The size of the film is larger than the size of the cavity opening of the test box (2) and the air intake box (3). The test box (2) and the air intake box (3) can clamp the film. An optical rangefinder (202) for detecting the deformation of the film is provided in the test box (2).
2. A thin film production detection device according to claim 1, characterized in that: A first sealing strip (201) is fixed to the lower end surface of the detection box (2), and the first sealing strip (201) is arranged around the lower end surface.
3. The thin film production detection device according to claim 2, characterized in that: A second sealing strip (301) is fixed to the upper end surface of the air intake box (3), the second sealing strip (301) is opposite to the first sealing strip (201), and the cross sections of the two sealing strips are consistent.
4. The thin film production detection device according to claim 1, characterized in that: The optical distance meter (202) is located in the middle of the top surface inside the detection box (2), and the optical distance meter (202) is facing the film.
5. The thin film production detection device according to claim 1, characterized in that: A display light (6) is installed on the side of the detection box (2), and the display light (6) is circuit-connected to the optical rangefinder (202).
6. The thin film production detection device according to claim 1, characterized in that: Film rollers (7) are provided on both sides of the detection box (2), and the film is rolled up on the film rollers (7) on one side.
7. The thin film production detection device according to claim 3, characterized in that: Cylinders (5) are fixed on both sides of the upper side of the air inlet box (3). The cylinders (5) are located outside the second sealing strip (301). The cylinders (5) can control the detection box (2) to rise and fall at a uniform speed.