An automated sorting device for contact lens mold powers

Abstract

The utility model discloses a kind of automatic sorting device of contact lens mold power, the device includes detection box, detection box front installation conveying device, left installation ejection device, right installation blanking part, upper installation lifting assembly, inside detection bin is set, right side is set discharge port.Lifting assembly includes power device and lifting hook, lifting hook extends to the inside of detection bin and is perforated, power device drives lifting hook to move.Detection bin inside installation goes material device, located lifting hook opposite side, including optical detection head and material column, material column telescopes in detection bin before and after.Conveying device sends material tray to detection bin, ejection device ejects material tray detection bin and moves to corresponding blanking part on.The utility model structure is reasonable, can automatically detect contact lens mold power and carry out sorting, improve production efficiency, reduce artificial cost, ensure sorting accuracy.

Description

Technical Field

[0001] This utility model relates to an automated sorting device for the prescription of contact lens molds. Background Technology

[0002] Contact lenses are a common vision correction tool, and the accurate detection and sorting of mold prescriptions during the production process is crucial to product quality. With the continuous growth of market demand for contact lenses, traditional manual inspection methods are no longer sufficient to meet the needs of modern production.

[0003] Currently, the testing of contact lens mold prescriptions mainly relies on manual observation. Operators need to visually determine whether the mold prescription meets the requirements. This method has extremely low inspection efficiency, only about 20 PP cups can be inspected per minute. Moreover, prolonged visual concentration work can easily lead to eye fatigue for operators, affecting the accuracy of the test. In addition, manual inspection also requires manually placing and picking molds, which not only increases the labor intensity but also makes it difficult to guarantee the consistency and reliability of the test.

[0004] However, existing technologies still have some shortcomings in the detection and sorting of contact lens mold prescriptions, mainly because the detection speed of existing testing equipment is relatively slow and cannot meet the needs of large-scale industrial production. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an automated sorting device for contact lens mold prescriptions, solving the problems of low efficiency, slow speed and insufficient accuracy of manual operation in the contact lens mold prescription detection process in the prior art. This purpose of this utility model is achieved as follows:

[0006] This utility model proposes an automated sorting device for contact lens mold prescriptions, including a testing box. A conveying device is installed at the front of the testing box, an ejector device is installed on the left side of the testing box, a feeding section is installed on the right side of the testing box, and a lifting assembly is installed at the top of the testing box. A testing chamber is opened inside the testing box, and a discharge port is opened on the right side of the testing box. The ejector device corresponds to the discharge port. The lifting assembly includes a power unit and a lifting hook. The lifting hook penetrates the testing box and extends into the testing chamber. The power unit drives the lifting hook to move. A material removal device is installed inside the testing chamber, opposite to the lifting hook. The material removal device includes an optical detection head and a material removal column. The material removal column extends and retracts back and forth inside the testing chamber. The conveying device delivers a tray into the testing chamber, and the ejector device ejects the tray out of the testing chamber and moves it to the corresponding feeding section.

[0007] Furthermore, the conveying device includes a conveyor belt and a drive motor, wherein the conveyor belt, driven by the drive motor, feeds the material tray into the testing chamber.

[0008] Furthermore, a cylinder is installed inside the discharge column.

[0009] Furthermore, the feeding section is provided with three feeders.

[0010] Furthermore, the power unit includes a conveyor belt and a drive unit, the drive unit driving the lifting hook to move up and down, and the conveyor belt driving the drive gear to move left and right.

[0011] Furthermore, the discharge column moves vertically and horizontally on the discharge device via a connecting rod mechanism.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting up a combination structure of conveying device, lifting hook and unloading device, the automatic conveying, lifting and unloading functions of material tray are realized, which greatly reduces manual operation, improves detection efficiency, and can inspect and sort more than 120 contact lens molds per minute. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of an automated sorting device for contact lens mold prescriptions;

[0014] Figure 2 This is a top-view schematic diagram of an automated sorting device for contact lens mold prescriptions;

[0015] In the diagram: 1. Lifting assembly, 2. Detection box, 3. Optical detection head, 4. Material removal device, 5. Material removal column, 6. Material tray, 7. Conveying device, 8. Unloading section, 9. Power unit, 10. Discharge port, 11. Lifting hook, 12. Detection chamber, 13. Ejection device. Detailed Implementation

[0016] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0017] Example 1

[0018] Please refer to Figure 1-2 An automated sorting device for contact lens mold prescription includes a testing box 2, a conveying device 7 installed at the front of the testing box 2, an ejector device 13 installed at the left side of the testing box 2, a feeding part 8 installed at the right side of the testing box 2, a lifting component 1 installed at the top of the testing box 2, a testing chamber 12 opened inside the testing box 2, and a discharge port 10 opened on the right side of the testing box 2. The ejector device 13 corresponds to the discharge port 10.

[0019] The inspection box 2 is the main structure of the entire sorting device, made of stainless steel, which has good corrosion resistance and stability. The inspection box 2 measures 800mm in length, 600mm in width, and 500mm in height. The front of the inspection box 2 has a feed inlet connected to the conveyor 7, used to transport the trays 6 into the inspection chamber 12. The left side of the inspection box 2 has a mounting position for the ejector 13, the right side has a mounting position for the unloading section 8, and the top has a mounting position for the lifting assembly 1. The inspection chamber 12, measuring 400mm in length, 300mm in width, and 200mm in height, is located inside the inspection box 2 and is used to hold the contact lens mold trays 6 to be inspected and perform the inspection operation. The right side of the inspection box 2 has a discharge port 10, measuring 350mm in width and 150mm in height. The discharge port 10 corresponds to the ejector 13, facilitating the ejection of the inspected trays 6 from the inspection chamber 12.

[0020] The conveyor device 7 is installed at the front of the inspection box 2 and includes a conveyor belt and a drive motor. The conveyor belt is made of PVC material, with a width of 300mm and a length of 600mm. Its surface has anti-slip textures to ensure that the material tray 6 does not slip during conveying. The drive motor is a servo motor with a power of 0.75kW and an adjustable speed range of 0-1500rpm. It is connected to the drive shaft of the conveyor belt through a reducer. Driven by the drive motor, the conveyor belt feeds the material tray 6 into the inspection chamber 12. The conveying speed can be adjusted according to production needs, generally set to 0.1-0.3m / s. The conveyor device 7 is also equipped with a photoelectric sensor to detect the position of the material tray 6. When the material tray 6 reaches the designated position, the sensor sends a signal, and the control system stops the conveyor belt, ensuring that the material tray 6 is accurately positioned within the inspection chamber 12.

[0021] The ejector device 13 is installed on the left side of the inspection chamber 2, corresponding to the discharge port 10. The ejector device 13 includes a cylinder, a push plate, and a guide mechanism. The cylinder is a double-acting cylinder with a diameter of 63mm, a stroke of 400mm, and a working pressure of 0.6MPa. The push plate is connected to the piston rod of the cylinder, made of aluminum alloy with an anodized surface, and measures 320mm wide, 130mm high, and 10mm thick. The guide mechanism includes two guide rods and four linear bearings to ensure the push plate maintains a stable horizontal movement when pushing the material tray 6. The function of the ejector device 13 is to eject the material tray 6 from the inspection chamber 12 after inspection and push it onto the corresponding unloading section 8. The thrust of the ejector device 13 can reach 500N, sufficient to smoothly move a fully loaded material tray 6.

[0022] The unloading section 8 is installed on the right side of the testing box 2 and has three unloading channels, each corresponding to contact lens molds with different power ranges. Each unloading channel includes a slide and a receiving tray 6. The slide is made of stainless steel with a polished surface to reduce friction and ensure that the tray 6 slides smoothly. The slide is 350mm wide, 800mm long, and has an inclination angle of 15°. The receiving tray 6 is located at the end of the slide and is used to collect the fallen trays 6. Its dimensions are 400mm long, 400mm wide, and 100mm high. The three unloading channels are marked as "High Power," "Medium Power," and "Low Power" for easy identification by operators and subsequent processing.

[0023] The lifting assembly 1 is installed on the upper part of the inspection box 2 and includes a power unit 9 and a lifting hook 11. The power unit 9 includes a conveyor belt and a drive unit. The conveyor belt adopts a synchronous belt structure, with a width of 20mm and a length determined according to the actual installation position. The drive unit includes a servo motor and a reducer. The servo motor has a power of 0.4kW, an adjustable speed range of 0-3000rpm, and a reduction ratio of 1:10. The conveyor belt drives the drive gear to move left and right, and the drive gear meshes with the connecting mechanism of the lifting hook 11 to achieve horizontal movement of the lifting hook 11. The drive unit also includes a lifting mechanism driven by a stepper motor with a step angle of 1.8°. The stepper motor converts the rotational motion into linear motion through a screw and nut mechanism, driving the lifting hook 11 to move up and down. The lifting hook 11 penetrates the inspection box 2 and extends into the interior of the inspection chamber 12. The lifting hook 11 is made of stainless steel with a polished surface, and its front end is designed as a hook to facilitate hooking the contact lens mold. The moving accuracy of the lifting hook 11 reaches ±0.05mm, ensuring accurate positioning and gripping of the mold.

[0024] The inspection chamber 12 houses a material removal device 4, which is located opposite the lifting hook 11. The material removal device 4 includes an optical inspection head 3 and a material removal column 5. The optical inspection head 3 uses a high-precision CCD camera with a resolution of 1920×1080 pixels and is equipped with an LED ring light source to provide uniform illumination. The optical inspection head 3 is fixed to the top of the inspection chamber 12 by a bracket and can photograph the contact lens mold in the material tray 6 to obtain clear image information. The image information is transmitted to the control system via a data cable for image processing and diopter recognition. The material removal column 5 is installed below the optical inspection head 3 and is used for retracting and extending within the inspection chamber 12. The material removal column 5 contains a cylinder; the cylinder is a miniature cylinder with a diameter of 25mm, a stroke of 100mm, and a working pressure of 0.4MPa. The material removal column 5 moves vertically and horizontally on the material removal device 4 via a linkage mechanism. The linkage mechanism includes two sets of linear guides and sliders; one set is used for vertical movement, and the other for horizontal movement. Vertical movement is driven by a cylinder with a stroke of 150mm; horizontal movement is driven by a stepper motor with a stroke of 200mm. The front end of the material removal column 5 is designed as a suction cup structure, which uses a vacuum generator to generate negative pressure to adsorb the contact lens mold and remove it from the material tray 6.

[0025] In actual operation, the tray 6 containing the contact lens mold is first placed on the conveyor belt of the conveyor device 7. Driven by a motor, the conveyor belt feeds the tray 6 into the inspection chamber 12. When the tray 6 reaches the designated position, the photoelectric sensor sends a signal, and the control system stops the conveyor belt. Then, the optical inspection head 3 captures an image of the contact lens mold in the tray 6, obtaining image information. The control system uses an image processing algorithm to identify the power of the mold. Based on the identification result, the control system controls the unloading device 4 and the lifting assembly 1 to work together to classify and process molds of different powers.

[0026] For molds requiring sorting, the desiccant 5 moves above the mold via a linkage device, then descends and uses a suction cup to pick up the mold, removing it from the tray 6. Driven by the power unit 9, the lifting hook 11 moves to the appropriate position, receives the mold removed by the desiccant 5, and places it into the corresponding grade collection container. After the inspection and sorting of a tray 6 is completed, the cylinder of the ejector device 13 pushes the push plate, ejecting the tray 6 from the inspection chamber 12 and pushing it onto the corresponding unloading section 8. Based on the main grade range of the molds in the tray 6, the control system selects one of the three unloading channels to push the tray 6, achieving classified collection of the tray 6.

[0027] The control system of this automated sorting device uses a PLC as the core control unit, coupled with a touch screen human-machine interface, to achieve automated control and parameter setting of the equipment. The control system also has data recording and statistical functions, which can record the degree distribution of each batch of molds, providing data support for production management.

[0028] Example 2

[0029] Based on Embodiment 1, the stripper column 5 moves vertically and horizontally on the stripper device 4 via a linkage mechanism. The linkage mechanism includes two sets of linear guides and sliders; one set enables vertical movement, and the other enables horizontal movement. Vertical movement is driven by a servo motor with a stroke of 150mm; horizontal movement is driven by a stepper motor with a stroke of 200mm. The front end of the stripper column 5 is designed as a mechanical gripper structure, pneumatically driven, which can grip the contact lens mold and remove it from the material tray 6. The opening and closing range of the mechanical gripper is 0-30mm, the gripping force is adjustable, and the maximum gripping force is 20N.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automated sorting device for contact lens mold prescriptions, characterized in that, The device includes a testing box, a conveying device installed at the front, an ejector device installed at the left, a feeding section installed at the right, and a lifting assembly installed at the top. The testing box has an internal testing chamber and a discharge port on its right side. The ejector device corresponds to the discharge port. The lifting assembly includes a power unit and a lifting hook, which penetrates the testing box and extends into the testing chamber. The power unit drives the lifting hook to move. A material removal device is installed inside the testing chamber, opposite the lifting hook. The material removal device includes an optical testing head and a material removal column, which extends and retracts within the testing chamber. The conveying device delivers a material tray into the testing chamber, and the ejector device ejects the material tray from the testing chamber and moves it to the corresponding feeding section.

2. The automated sorting device for contact lens mold prescriptions according to claim 1, characterized in that, The conveying device includes a conveyor belt and a drive motor. The conveyor belt, driven by the drive motor, feeds the material tray into the testing chamber.

3. The automated sorting device for contact lens mold prescriptions according to claim 2, characterized in that, A cylinder is installed inside the discharge column.

4. The automated sorting device for contact lens mold prescriptions according to claim 3, characterized in that, The feeding section has three feeders.

5. An automated sorting device for contact lens mold prescriptions according to claim 4, characterized in that, The power unit includes a conveyor belt and a drive unit. The drive unit drives the lifting hook to move up and down, and the conveyor belt drives the drive gear to move left and right.

6. An automated sorting device for contact lens mold prescriptions according to claim 1, characterized in that, The discharge column moves vertically and horizontally on the discharge device via a connecting rod mechanism.

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