A device for automatic detection of the dimensions of plastic products

Abstract

The utility model discloses a kind of about plastic product size automatic detection device, comprising: first gas detection head, be set to product top, for detecting product upper inner diameter size;First slide cylinder is connected with first gas detection head, control its longitudinal lifting motion;Second gas detection head, be set to product below, for detecting product lower inner diameter size;Second slide cylinder is connected with second gas detection head, control its longitudinal lifting motion;Main fixture plate is as positioning platform, for placing product;Guide rod cylinder is linked by slider with main fixture plate, for product horizontal push to the detection area between first gas detection head and second gas detection head.This application replaces traditional manual detection mode by automatic detection device, significantly improves production efficiency and product quality control level;The device can effectively reduce labor cost, solve the problem of missed detection in manual detection.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, specifically to a device for automatic detection of the dimensions of plastic products. Background Technology

[0002] With the continuous development of industrial technology, plastic products are increasingly widely used in precision machinery, automobiles, electronics, and other fields. Some key functional plastic products require extremely high dimensional accuracy. For example, a certain plastic product has two mating parts for mounting bearings, with very small tolerances. If the dimensions are out of tolerance, it will directly affect assembly performance and service life. To ensure product quality, 100% inspection of critical dimensions is required, and only qualified products are allowed to leave the factory.

[0003] Currently, pneumatic measuring instruments are widely used in the industry for high-precision dimensional inspection, and the probes need to be customized according to the shape and size of the part being measured. However, existing inspection methods have the following significant problems:

[0004] 1. Manual inspection is inefficient and costly: The need for dedicated personnel to operate pneumatic measuring instruments for full inspection not only increases labor costs but also impacts production efficiency due to limited inspection speed. Furthermore, the stability of manual inspection is affected by factors such as operator skill level and fatigue, making it difficult to maintain high accuracy over long periods.

[0005] 2. Risk of missed inspection is hard to avoid: During manual operation, some products may not be inspected due to negligence or loopholes in process management, thus failing to truly achieve the requirement of 100% full inspection and posing potential quality risks. Utility Model Content

[0006] The purpose of this invention is to provide a device for automatic detection of the size of plastic products, which replaces manual operation with automation technology to achieve a highly efficient, accurate, and fully controllable detection method.

[0007] To achieve the above objectives, this application proposes an apparatus for automatic size detection of plastic products, comprising:

[0008] The first air detector is located above the product and is used to detect the upper inner diameter of the product.

[0009] The first slide cylinder is connected to the first air sensor head and controls its longitudinal lifting and lowering movement.

[0010] The second air detector is located below the product and is used to detect the inner diameter of the lower part of the product.

[0011] The second slide cylinder is connected to the second air probe and controls its longitudinal lifting and lowering movement.

[0012] The main fixture plate serves as a positioning platform for placing the product.

[0013] The guide rod cylinder, linked to the main fixture plate via a slider, is used to horizontally push the product to the detection area between the first and second air detectors.

[0014] In one embodiment, the first gas detector head is fixed on the first slide cylinder by a first mounting plate, and a first rubber ring is provided between the first mounting plate and the first gas detector head; the second gas detector head is fixed on the second slide cylinder by a second mounting plate, and a second rubber ring is provided between the second mounting plate and the second gas detector head.

[0015] In one embodiment, the first mounting plate is provided with a pressing component, which is distributed around the outer periphery of the first gas detector head.

[0016] In one embodiment, the pressing component includes:

[0017] A rubber pressure column, the upper end of which is fixedly connected to the first mounting plate, and the lower end forms a limiting head, which is used to contact the product surface and apply flexible pressure;

[0018] A spring is sleeved around the rubber pressure column, with its two ends abutting against the first mounting plate and the limiting head, respectively, and provides adjustable downward pressure through elastic deformation.

[0019] In one embodiment, the first air detector, the first slide cylinder, the second air detector, the second slide cylinder, and the guide rod cylinder are connected to the PLC controller.

[0020] In one embodiment, the first slide cylinder and the second slide cylinder are mounted on a support plate, and the support plate and the guide rod cylinder are both fixed on the profile bracket. The upper part of the profile bracket is provided with a dust cover.

[0021] In one embodiment, the profile bracket is provided with a start button and a release button connected to a PLC controller.

[0022] In one embodiment, magnetic switches connected to a PLC controller are provided at both ends of the guide rod cylinder.

[0023] In one embodiment, the PLC controller is connected to a first counter and a second counter, the first counter being used to count the number of qualified good products and the second counter being used to count the number of unqualified defective products.

[0024] In one embodiment, the main fixture plate is provided with positioning pins for limiting the product position.

[0025] Compared with the prior art, the above technical solution adopted by this utility model has the following advantages: This application replaces the traditional manual inspection method with an automated inspection device, which significantly improves production efficiency and product quality control. This device can effectively reduce labor costs and solve the problem of missed inspections in manual inspection.

[0026] In practice, operators only need to perform two simple actions: loading and unloading products. There is no need for dedicated inspection positions, thus significantly simplifying the production process. More importantly, this device fundamentally eliminates the outflow of dimensionally non-compliant products, ensuring consistent product quality. This design not only improves inspection accuracy but also achieves dual optimization of production costs and quality control. Attached Figure Description

[0027] Figure 1 A side view of a device for automatic size detection of plastic products;

[0028] Figure 2 This is a schematic diagram of a device for automatic size detection of plastic products;

[0029] Figure 3 This is a partial schematic diagram of a device for automatic size detection of plastic products;

[0030] Figure 4 This is a partial structural diagram of a device for automatic size detection of plastic products;

[0031] The components are: 1. Support plate, 2. First slide cylinder, 3. First air probe, 4. First mounting plate, 5. Second air probe, 6. Second mounting plate, 7. Main fixture plate, 8. Second slide cylinder, 9. Dust cover, 10. Start button and release button, 11. Guide rod cylinder, 12. Profile bracket, 13. First rubber ring, 14. Positioning pin, 15. Spring. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0035] In the description of this application, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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. Therefore, they should not be construed as limitations on this application.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Please see Figure 1-4 This embodiment provides an apparatus for automatic detection of the size of plastic products, including a detection mechanism, a conveying and positioning mechanism, a pressing component, a support structure, a control system, and a counting system;

[0038] The testing mechanism includes an upper testing unit and a lower testing unit. The upper testing unit includes: a first gas probe positioned above the product for detecting the upper inner diameter of the product, employing a customized probe structure to adapt to the shape of the measured part; a first slide cylinder (preferably MSQ12-20) connected to the first gas probe, controlling its longitudinal lifting movement; the first gas probe fixed to the first slide cylinder via a first mounting plate, with a first rubber ring between them; and pressing components distributed around the outer periphery of the first gas probe on the first mounting plate. The lower testing unit includes: a second gas probe positioned below the product for detecting the lower inner diameter of the product, its structure corresponding to the first gas probe to ensure measurement consistency; a second slide cylinder (preferably MSQ12-20) connected to the second gas probe, controlling its longitudinal lifting movement; and the second gas probe fixed to the second slide cylinder via a second mounting plate, with a second rubber ring between them, the rubber ring serving to reduce gas detection errors.

[0039] In the conveying and positioning mechanism, the main fixture plate serves as a positioning platform for placing the product, and positioning pins are distributed on it for product limiting; the guide rod cylinder (preferred model RMT20*250S) is linked to the main fixture plate through a slider; magnetic switches (preferred model CMSG-020) are respectively provided at both ends of the guide rod cylinder.

[0040] The pressing assembly includes a rubber pressure column and a spring. The upper end of the rubber pressure column is fixed to the first mounting plate, and the lower end forms a limiting head. The rubber pressure column is used to avoid scratching the product surface. The spring is sleeved around the rubber pressure column, and its two ends abut against the first mounting plate and the limiting head, respectively. The spring preload can suppress the instantaneous impact generated when the air detector head rises, and prevent the product from jumping.

[0041] The support structure includes a first slide cylinder and a second slide cylinder mounted on a support plate; the support plate and the guide rod cylinder are both fixed on the profile bracket; a dust cover is provided on the upper part of the profile bracket to prevent dust in the environment from entering the device and affecting its accuracy.

[0042] The control system includes a first air probe, a first slide cylinder, a second air probe, a second slide cylinder, and a guide rod cylinder, all of which are connected to a PLC controller. Each cylinder is equipped with a corresponding solenoid valve between itself and the PLC controller. The start button and release button on the profile bracket are connected to the PLC controller. The magnetic switch of the guide rod cylinder is connected to the PLC controller. Preferably, the PLC controller is also connected to a red light, a green light, and a buzzer.

[0043] The counting system includes a PLC controller connected to a first counter and a second counter; the first counter is used to count the number of good products, and the second counter is used to count the number of defective products.

[0044] The operating process of the above device is as follows: The operator first places the product on the main fixture plate and ensures consistent product positioning through the positioning pins. After pressing the start button, the guide rod cylinder sends the product into the detection area. When the magnetic switch detects the positioning signal, the first slide cylinder drives the first air detector head downward to the detection position. At the same time, the pressing component presses the product, and the first air detector head begins to detect the upper inner diameter of the product. After the upper detection is completed, the first slide cylinder returns to the origin, and at the same time, the second slide cylinder drives the second air detector head upward to detect the lower inner diameter of the product. After the lower detection is completed, the second slide cylinder returns to the origin. The PLC controller combines the results of the two detections to make a judgment: when both the upper and lower dimensions are qualified, an OK signal is output, triggering a green light and activating the first counter to record the number of good products; when either dimension is unqualified, an NG signal is output, triggering a red light and a buzzer alarm, and activating the second counter to record the number of defective products. To ensure effective isolation of defective products, operators must move NG products into a dedicated collection box and press the release button to confirm the processing before proceeding to the next product for inspection. This design effectively prevents the risk of defective products mixing with good products.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A device for automatic size detection of plastic products, characterized in that, include: The first air detector is located above the product and is used to detect the upper inner diameter of the product. The first slide cylinder is connected to the first air sensor head and controls its longitudinal lifting and lowering movement. The second air detector is located below the product and is used to detect the inner diameter of the lower part of the product. The second slide cylinder is connected to the second air probe and controls its longitudinal lifting and lowering movement. The main fixture plate serves as a positioning platform for placing the product. The guide rod cylinder, linked to the main fixture plate via a slider, is used to horizontally push the product to the detection area between the first and second air detectors.

2. The device for automatic size detection of plastic products according to claim 1, characterized in that, The first gas detector head is fixed on the first slide cylinder by a first mounting plate, and a first rubber ring is provided between the first mounting plate and the first gas detector head; the second gas detector head is fixed on the second slide cylinder by a second mounting plate, and a second rubber ring is provided between the second mounting plate and the second gas detector head.

3. The device for automatic size detection of plastic products according to claim 2, characterized in that, The first mounting plate is provided with a pressing component, which is distributed around the outer periphery of the first gas detector head.

4. The device for automatic size detection of plastic products according to claim 3, characterized in that, The pressing component includes: A rubber pressure column, the upper end of which is fixedly connected to the first mounting plate, and the lower end forms a limiting head, which is used to contact the product surface and apply flexible pressure; A spring is sleeved around the rubber pressure column, with its two ends abutting against the first mounting plate and the limiting head, respectively, and provides adjustable downward pressure through elastic deformation.

5. The device for automatic size detection of plastic products according to claim 1, characterized in that, The first air detector head, the first slide cylinder, the second air detector head, the second slide cylinder, and the guide rod cylinder are connected to the PLC controller.

6. The device for automatic size detection of plastic products according to claim 5, characterized in that, The first slide cylinder and the second slide cylinder are mounted on the support plate. The support plate and the guide rod cylinder are both fixed on the profile bracket. The upper part of the profile bracket is provided with a dust cover.

7. The device for automatic size detection of plastic products according to claim 6, characterized in that, The profile support is equipped with a start button and a release button connected to the PLC controller.

8. The device for automatic size detection of plastic products according to claim 5, characterized in that, The guide rod cylinder is equipped with magnetic switches at both ends that are connected to the PLC controller.

9. The device for automatic size detection of plastic products according to claim 5, characterized in that, The PLC controller is connected to a first counter and a second counter. The first counter is used to count the number of qualified good products, and the second counter is used to count the number of unqualified defective products.

10. The device for automatic size detection of plastic products according to claim 1, characterized in that, The main fixture plate is equipped with positioning pins for limiting the position of the product.

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