A contact lens wire strip casting device

Abstract

The utility model relates to contact lens automation production technical field, concretely is a kind of contact lens line moulding and taking piece equipment, including vibration feed unit, moulding unit, shell-off visual inspection unit, mould turnover unit, master mould transfer unit and mould taking unit according to mould flow direction;Shell-off pre-pressing unit is arranged between vibration feed unit and moulding unit, and carrying unit is also arranged at master mould transfer unit and piece taking unit;The utility model whole work flow is smooth, and degree of automation is high, and time cost of multiple turnover is reduced;Through pre-pressing, visual inspection and turnover action, overall reduce artificial dependence, save turnover time cost, reduce the quality fluctuation caused by frequent line change and turnover, improve contact lens demolding and taking piece efficiency, improve contact lens product overall quality.

Description

Technical Field

[0001] This utility model relates to the field of automated production technology of contact lenses, specifically a contact lens molding and lens extraction device. Background Technology

[0002] Traditional contact lens manufacturing relies on manual operation and discrete equipment, which has bottlenecks such as fixed process parameters, low line change efficiency, and large quality fluctuations.

[0003] Conventional mold-separation and lens removal processes are prone to damaging lenses, and the separation device is prone to mold misalignment and jamming. Successful demolding also relies on manual and human eye recognition. Among these, the risk of human error and the reliance on mechanical suction head for mold opening and lens removal can easily lead to problems such as lens detachment and contamination, which seriously restricts the overall upgrading of the contact lens industry towards high-end, flexible, and automated production. In addition, the time cost caused by conventional material turnover and transportation is relatively large.

[0004] Therefore, in order to meet market demands, a solution is urgently needed. Utility Model Content

[0005] The purpose of this invention is to provide a contact lens thread separation and extraction device that reduces reliance on manual labor, saves turnaround time and costs, reduces quality fluctuations caused by frequent thread changes and turnarounds, improves the efficiency of contact lens demolding and extraction, and enhances the overall quality of contact lens products.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A contact lens thread mold splitting and removal device includes, according to the mold flow direction, a vibration feeding unit, a mold splitting unit, a shell removal and inspection unit, a mold flipping unit, a master mold transfer unit, and a mold removal unit; a shell removal pre-compression unit is provided between the vibration feeding unit and the mold splitting unit, and a conveying unit is also provided at the master mold transfer unit and the mold removal unit. During the mold separation and sheet removal process, the vibrating feeding unit transports the mold to be deshelled to the deshelling pre-compression unit for extrusion and pre-deshelling. The pre-compressed mold is then transported by the vibrating feeding unit to the mold separation unit for mold separation and deshelling. The deshelled mold is then transported by the mold separation unit and passes through the deshelling inspection unit for post-deshelling inspection. After inspection, the mold is flipped by the mold flipping unit and sent to the master mold transfer unit. The transport unit then transports the transferred mold from the master mold transfer unit to the mold removal unit for demolding and sheet removal. Finally, the transport unit transports and unloads the demolded lens.

[0008] Furthermore, the vibratory feeding unit, shelling pre-pressing unit, mold splitting unit, shelling inspection unit, mold flipping unit, master mold transfer unit, mold removal unit, and transport unit are all arranged in parallel in two rows to achieve synchronous operation on two lines; a feeding robotic arm is provided at one of the vibratory feeding units for feeding the vibratory feeding unit.

[0009] Furthermore, the shelling pre-compression unit includes a pre-compression drive device disposed between the vibratory feeding unit and the mold separating unit, and a pre-compression block driven and connected to the execution end of the pre-compression drive device.

[0010] Furthermore, the mold flipping unit includes a mold flipping mechanism and a mold feeding mechanism; the mold splitting unit sends the mold after shelling and mold splitting to the mold flipping mechanism, the mold flipping mechanism drives the mold to rotate and flip and sends it into the mold feeding mechanism, and the mold feeding mechanism sends the flipped master mold carrying the lens into the master mold transfer unit.

[0011] Furthermore, the mold flipping mechanism includes a flipping cylinder frame and a flipping drive device fixed on the flipping cylinder frame. The actuating end of the flipping drive device extends into the flipping cylinder frame and drives the connected mold rotating cylinder. A set of mold inlet slots and mold outlet slots are provided on the flipping cylinder frame, and multiple mold release slots are provided on the mold rotating cylinder. During mold flipping, the mold splitting unit drives the mold after shelling to enter the mold release slot of the mold rotating cylinder from the mold inlet slot. The flipping drive device drives the mold rotating cylinder to rotate so that the mold in the mold release slot moves to the mold outlet slot. The mold falls out of the mold outlet slot from the flipping cylinder frame and enters the mold feeding mechanism.

[0012] Furthermore, the master mold transfer unit includes a support mechanism and a transfer mechanism; the transfer mechanism transports the overturned mold containing the lens from the mold feeding mechanism to the support mechanism, and the support mechanism lifts and moves the overturned mold containing the lens to a designated position so that the transfer unit can transport the mold to the mold removal unit.

[0013] Furthermore, the mold-removing unit includes a mold-removing frame, a limiting mechanism, and a top mold mechanism; the mold-removing frame is provided with multiple through-hole frames for supporting the mold; The transport unit moves the transferred mold to the through-hole frame, the limiting mechanism presses down to limit the mold, and the actuator of the ejector mechanism lifts and passes through the through-hole frame to eject the mold containing the lens so that the lens is separated; the transport unit then transports and unloads the demolded lens.

[0014] Furthermore, the limiting mechanism includes a limiting drive device and a limiting pressure plate that is driven and connected to the execution end of the limiting drive device; the limiting pressure plate is provided with a clearance hole corresponding to the through hole frame; when limiting, the limiting drive device drives the limiting pressure plate to press down to avoid displacement of the mold.

[0015] Furthermore, the top mold mechanism includes a top mold driving device, a top mold frame plate driven and connected to the execution end of the top mold driving device, and a top mold column mounted on the top mold frame plate; During the ejection process, the ejection mold drive device drives the ejection mold frame plate, which in turn drives the ejection mold column to rise. The ejection mold column extends into the through hole frame to lift and squeeze the mold that has been limited, so that the lens is separated from the mold and demolded.

[0016] Furthermore, the top mold mechanism also includes a guide cylinder through which the top mold column passes when it rises.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In actual use, the overall workflow is smooth and highly automated, reducing the time cost of multiple turnarounds. The pre-compression demolding unit pre-compresses the mold, facilitating mold separation and demolding, and improving the efficiency of subsequent demolding operations. The demolding inspection unit after the mold separation unit checks whether the demolding was successful and determines whether the mold separation unit is working properly, avoiding interruptions to subsequent lens removal operations by undemolded molds. Through pre-compression, inspection, and flipping actions, the overall reliance on manual labor is reduced, turnaround time costs are saved, quality fluctuations caused by frequent line changes and turnarounds are reduced, the efficiency of contact lens demolding and lens removal is improved, and the overall quality of contact lens products is enhanced. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the planar structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the shell removal and pre-compression unit in this utility model; Figure 4 This is a three-dimensional structural diagram of the mold flipping unit in this utility model; Figure 5 This is a schematic diagram illustrating the operating principle of the mold flipping unit in this utility model; Figure 6 This is a schematic diagram of the planar structure of the master mold transfer unit in this utility model; Figure 7 This is a three-dimensional structural diagram of the mold-taking unit in this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] refer to Figure 1-7As shown, a contact lens thread mold separating and removal device includes, according to the mold flow direction, a vibration feeding unit 200, a mold separating unit 400, a shell removal inspection unit 600, a mold flipping unit 500, a master mold transfer unit 700, and a mold removal unit 800; a shell removal pre-compression unit 300 is provided between the vibration feeding unit 200 and the mold separating unit 400, and a conveying unit 900 is also provided at the master mold transfer unit 700 and the mold removal unit 800; During the mold separation and film removal process, the vibrating feeding unit 200 conveys the mold to be removed to the pre-pressing unit 300 for pre-pressing and extrusion. The pre-pressed mold is then conveyed by the vibrating feeding unit 200 to the mold separation unit 400 for mold separation and film removal. The removed mold is then conveyed by the mold separation unit 400 and passes through the removal inspection unit 600 for post-removal inspection. After inspection, the mold is flipped by the mold flipping unit 500 and sent to the master mold transfer unit 700. The transport unit 900 transports the transferred mold from the master mold transfer unit 700 to the mold removal unit 800 for demolding and film removal. The transport unit 900 then transports and unloads the demolded lens.

[0021] This contact lens molding and lens retrieval equipment features a smooth workflow and a high degree of automation, reducing the time cost of multiple turnarounds. The pre-compression demolding unit 300 pre-compresses the mold, facilitating mold demolding and improving the efficiency of subsequent demolding operations. The demolding inspection unit 600, following the molding unit 400, checks the success of demolding, ensuring the molding unit 400 is functioning correctly and preventing interruptions in subsequent lens retrieval operations due to unremoved molds. Through pre-compression, inspection, and flipping actions, the equipment significantly reduces reliance on manual labor, saves turnaround time, minimizes quality fluctuations caused by frequent line changes and turnarounds, improves contact lens demolding and lens retrieval efficiency, and enhances the overall quality of contact lens products.

[0022] In this embodiment, the vibratory feeding unit 200, the shelling pre-pressing unit 300, the mold splitting unit 400, the shelling visual inspection unit 600, the mold flipping unit 500, the master mold transfer unit 700, the mold removal unit 800, and the handling unit 900 are all arranged in parallel in two rows to achieve synchronous operation on two lines; a feeding robotic arm 100 is provided at one of the vibratory feeding units 200 for feeding materials into the vibratory feeding unit 200.

[0023] Specifically, the loading robotic arm 100 can use a multi-axis robotic arm to coordinate with a flexible suction cup to realize the loading and handling of molds; the dual-line parallel layout further makes reasonable use of the site space and reduces the area occupied by the equipment; the loading robotic arm 100 realizes high-efficiency loading work and improves the overall demolding and lens removal efficiency of contact lenses.

[0024] In this embodiment, the shelling pre-compression unit 300 includes a pre-compression driving device 310 disposed between the vibrating feeding unit 200 and the mold splitting unit 400, and a pre-compression block 320 drivenly connected to the execution end of the pre-compression driving device 310. Specifically, the pre-press drive device 310 can use an electric cylinder to drive the pre-press block 320 to pre-press the mold. The electric cylinder can be set with its own pressing stroke and pressure as needed. After pre-pressing, the mold can be more convenient and faster to remove the shell, thereby improving the overall shelling efficiency.

[0025] In this embodiment, the mold-separating unit 400 separates and removes the male mold of the mold, and the technical solution of the mold-separating unit 400 can be implemented by existing technology, so it will not be described in detail here.

[0026] In this embodiment, the shell removal visual inspection unit 600 is a visual inspection camera, which can visually inspect and photograph the mold after shell removal to detect whether the mold has been successfully shelled.

[0027] In this embodiment, the mold flipping unit 500 includes a mold flipping mechanism 510 and a mold feeding mechanism 520. The mold separating unit 400 sends the mold after shelling and mold separating to the mold flipping mechanism 510. The mold flipping mechanism 510 drives the mold to rotate and flip, and then sends it into the mold feeding mechanism 520. The mold feeding mechanism 520 sends the flipped master mold carrying the lens into the master mold transfer unit 700. Specifically, the mold feeding mechanism 520 is a linear vibrating feeder, which can linearly transport the flipped mold.

[0028] In this embodiment, the mold flipping mechanism 510 includes a flipping cylinder frame 511 and a flipping drive device 513 fixed on the flipping cylinder frame 511. The execution end of the flipping drive device 513 extends into the flipping cylinder frame 511 and drives the connected mold rotating cylinder 512. The flipping cylinder frame 511 is provided with a set of mold inlet slots 516 and mold outlet slots 517. The mold rotating cylinder 512 is provided with multiple mold release slots 514. During mold flipping, the mold splitting unit 400 drives the mold after shelling to enter the mold release slots 514 of the mold rotating cylinder 512 from the mold inlet slot 516. The flipping drive device 513 drives the mold rotating cylinder 512 to rotate so that the mold in the mold release slot 514 moves to the mold outlet slot 517. The mold falls out of the flipping cylinder frame 511 from the mold outlet slot 517 and enters the mold feeding mechanism 520.

[0029] Specifically, the flipping drive device 513 can use a high-precision encoder motor, and the flipping cylinder frame 511 is fixedly installed. The flipping drive device 513 drives the mold rotating cylinder 512 to rotate inside the flipping cylinder frame 511, thereby driving the mold in the mold release groove 514 to flip and rotate. When the mold is located at the mold release groove 517, the mold flipping action is completed. The overall mold flipping action is a continuous and automated operation, which reduces the turnover cost in the conventional process and makes the overall workflow more efficient and stable.

[0030] In this embodiment, the master mold transfer unit 700 includes a support mechanism 710 and a transfer mechanism 720. The transfer mechanism 720 transports the flipped mold containing the lens from the mold feeding mechanism 520 to the support mechanism 710. The support mechanism 710 lifts and moves the flipped mold containing the lens to a designated position so that the transfer unit 900 can transport the mold to the mold taking unit 800.

[0031] Specifically, the carrying mechanism 710 includes a carrying carrier 711 and a carrying lifting drive device 712 that drives the carrying carrier 711; the transfer mechanism 720 includes a transfer linear drive device 721, a transfer lifting drive device 722 that is driven and connected to the execution end of the transfer linear drive device 721, and a mold suction cup 723 installed on the execution end of the transfer lifting drive device 722; the carrying lifting drive device 712 and the transfer lifting drive device 722 can be cylinders, and the transfer linear drive device 721 can be a linear motor module; the transfer mechanism 720 transports the mold to the carrying carrier 711 of the carrying mechanism 710, and the carrying lifting drive device 712 drives the mold to be raised to a designated position by the carrying carrier 711, so that the handling mechanism 900 can carry out the handling and transfer of the mold, and realize the automated handling and turnover of the mold.

[0032] In this embodiment, the mold-removing unit 800 includes a lens-removing frame 810, a limiting mechanism 820, and a top-mold mechanism 830. The lens-removing frame 810 is provided with a plurality of through-hole frames 811 for supporting the mold. The transport unit 900 transports the transferred mold to the through-hole frame 811, the limiting mechanism 820 presses down to limit the mold, and the actuating end of the top-mold mechanism 830 lifts and passes through the through-hole frame 811 to top-mold the mold carrying the lens so that the lens is separated. The transport unit 900 transports and unloads the demolded lens.

[0033] Specifically, the through-hole frame 811 can be a circular hollow column. The through-hole frame 811 can facilitate the lifting operation of the top mold mechanism 830 execution end, and can also play a certain degree of guiding role, so as to realize automated lifting, mold separation and piece removal.

[0034] In this embodiment, the limiting mechanism 820 includes a limiting drive device 821 and a limiting pressure plate 822 that is driven and connected to the execution end of the limiting drive device 821; the limiting pressure plate 822 is provided with a clearance hole 823 corresponding to the through hole frame 811; when limiting, the limiting drive device 821 drives the limiting pressure plate 822 to press down to avoid displacement of the mold.

[0035] Specifically, the opening size of the clearance hole 823 is larger than the lens size but smaller than the size of the master mold, so as to avoid damage to the lens during the lifting and mold separation operation; the downward pressure of the limiting plate 822 improves the stability of the mold when separating the lens, avoids damage to the lens, and improves the yield of the overall production process.

[0036] In this embodiment, the top mold mechanism 830 includes a top mold driving device 831, a top mold frame plate 832 driven and connected to the execution end of the top mold driving device 831, and a top mold column 833 mounted on the top mold frame plate 832. During the top mold operation, the top mold driving device 831 drives the top mold frame plate 832, thereby driving the top mold column 833 to rise. The top mold column 833 extends into the through hole frame 811 to lift and squeeze the mold that has been limited, so that the lens is separated from the mold and demolded.

[0037] Specifically, the top mold drive device 831 can adopt a linear screw mechanism driven by a servo motor, which can perform smooth and gentle lifting operations to avoid damaging the lens; the top mold column 833 is the execution end of the lifting operation. Under the drive of the top mold drive device 831, the top mold column 833 lifts and squeezes the mold, causing the center of the mold to be concave upwards, thereby pushing the lens to separate, realizing efficient, stable and high yield demolding and mold splitting drive action, avoiding the risk fluctuations of manual operation and multiple turnovers, and improving the overall lens picking efficiency and quality.

[0038] In this embodiment, the top mold mechanism 830 further includes a guide cylinder 834, through which the top mold column 833 passes when it rises.

[0039] In this embodiment, the handling unit 900 can use a linear motor module in conjunction with a lifting electric cylinder module to drive a flexible suction cup to achieve the adsorption and handling of the mold and lens.

[0040] This equipment achieves a technological breakthrough through the coordinated control of three core modules: This equipment overcomes technical bottlenecks through the coordinated control of the following three core modules: Module 1: Vibratory feeding unit 200, overall dual-channel high-speed feeding layout: adopts symmetrical vibratory plate design (amplitude adjustable from 0.5 to 3 mm), single channel capacity ≥ 2500 modules, realizing continuous feeding of 5000 modules; Module 2: Mold Separation Unit 400, using a dual-cam precision drive: two sets of independent cam mechanisms (stroke accuracy ±0.01mm) control the rotating separation fixture, which separates the male and female molds at a 15° angle to avoid mechanical hard collisions. The male mold is introduced into the waste collection box through a negative pressure pipeline (recycling efficiency ≥99.5%), and the female mold enters the next work station via the guide rail.

[0041] Module 3: The top-pressing and sheet removal station consists of the master mold transfer unit 700, the mold removal unit 800, and the conveying unit 900. The top-pressing station: the servo motor drives the extrusion head (pressure 10-20kPa) to eliminate residual stress in the module, and the precision cylinder (stroke accuracy ±0.05mm) vertically ejects the lens. With the help of the vacuum suction head (adsorption force adjustable from 0.5 to 1.2N), the sheet is removed without damage. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the scope defined by the spirit of this utility model.

Claims

1. A contact lens thread separation and extraction device, characterized in that, The mold includes a vibrating feeding unit (200), a mold splitting unit (400), a shell removal inspection unit (600), a mold flipping unit (500), a master mold transfer unit (700), and a mold removal unit (800) according to the mold flow direction; a shell removal pre-compression unit (300) is provided between the vibrating feeding unit (200) and the mold splitting unit (400), and a conveying unit (900) is also provided at the master mold transfer unit (700) and the mold removal unit (800); When the mold is separated and the film is removed, the vibrating feeding unit (200) transports the mold to be removed to the pre-pressing unit (300) for pre-pressing and extrusion. The pre-pressed mold is transported by the vibrating feeding unit (200) to the mold separating unit (400) for mold separation and removal. The removed mold is transported by the mold separating unit (400) and passes through the removal inspection unit (600) for post-removal inspection. After inspection, the mold is flipped by the mold flipping unit (500) and sent to the master mold transfer unit (700). The transport unit (900) transports the transferred mold from the master mold transfer unit (700) to the mold removal unit (800) for demolding and film removal. The transport unit (900) transports the demolded lens and unloads it.

2. The contact lens thread separation and extraction device according to claim 1, characterized in that, The vibratory feeding unit (200), shelling pre-compression unit (300), mold splitting unit (400), shelling inspection unit (600), mold flipping unit (500), master mold transfer unit (700), mold removal unit (800) and conveying unit (900) are all arranged in parallel in two rows to achieve synchronous operation on two lines; a feeding robot arm (100) is provided at one of the vibratory feeding units (200) for feeding the vibratory feeding unit (200).

3. The contact lens thread separation and extraction device according to claim 1, characterized in that, The shelling pre-compression unit (300) includes a pre-compression drive device (310) disposed between the vibrating feeding unit (200) and the mold splitting unit (400) and a pre-compression block (320) driven and connected to the execution end of the pre-compression drive device (310).

4. The contact lens thread separation and extraction device according to claim 1, characterized in that, The mold flipping unit (500) includes a mold flipping mechanism (510) and a mold feeding mechanism (520); the mold splitting unit (400) sends the mold after shelling and mold splitting to the mold flipping mechanism (510), the mold flipping mechanism (510) drives the mold to rotate and flip and sends it into the mold feeding mechanism (520), and the mold feeding mechanism (520) sends the flipped master mold carrying the lens into the master mold transfer unit (700).

5. The contact lens thread separation and extraction device according to claim 4, characterized in that, The mold flipping mechanism (510) includes a flipping cylinder frame (511) and a flipping drive device (513) fixed on the flipping cylinder frame (511). The execution end of the flipping drive device (513) extends into the flipping cylinder frame (511) and drives the connected mold rotating cylinder (512). A set of mold inlet slots (516) and mold outlet slots (517) are provided on the flipping cylinder frame (511), and multiple mold release slots (514) are provided on the mold rotating cylinder (512). During the mold flipping process, the mold splitting unit (400) drives the mold after shelling to enter the mold release groove (514) of the mold rotating cylinder (512) from the mold entry groove (516). The flipping drive device (513) drives the mold rotating cylinder (512) to rotate so that the mold in the mold release groove (514) moves to the mold exit groove (517). The mold falls out of the flipping cylinder frame (511) from the mold exit groove (517) and enters the mold feeding mechanism (520).

6. The contact lens thread separation and extraction device according to claim 4, characterized in that, The master mold transfer unit (700) includes a support mechanism (710) and a transfer mechanism (720); the transfer mechanism (720) transports the overturned mold containing the lens from the mold feeding mechanism (520) to the support mechanism (710), and the support mechanism (710) lifts and moves the overturned mold containing the lens to a designated position so that the mold can be transported to the mold removal unit (800) by the transport unit (900).

7. The contact lens thread separation and extraction device according to claim 1, characterized in that, The mold taking unit (800) includes a mold taking frame (810), a limiting mechanism (820), and a top mold mechanism (830); the mold taking frame (810) is provided with a plurality of through-hole frames (811) for supporting the mold. The transport unit (900) transports the transferred mold to the through hole frame (811), the limiting mechanism (820) presses down to limit the mold, the execution end of the ejector mechanism (830) lifts and passes through the through hole frame (811) to eject the mold carrying the lens so that the lens is separated; the transport unit (900) transports and unloads the demolded lens.

8. The contact lens thread separation and extraction device according to claim 7, characterized in that, The limiting mechanism (820) includes a limiting drive device (821) and a limiting pressure plate (822) driven and connected to the execution end of the limiting drive device (821); the limiting pressure plate (822) is provided with a clearance hole (823) corresponding to the through hole frame (811); when limiting, the limiting drive device (821) drives the limiting pressure plate (822) to press down to avoid displacement of the mold.

9. The contact lens thread separation and extraction device according to claim 7, characterized in that, The top mold mechanism (830) includes a top mold drive device (831), a top mold frame plate (832) driven and connected to the execution end of the top mold drive device (831), and a top mold column (833) mounted on the top mold frame plate (832). When the mold is ejected, the mold drive device (831) drives the mold support plate (832) to lift the mold column (833). The mold column (833) extends into the through hole frame (811) to lift and squeeze the mold that has been limited, so that the lens is separated from the mold and demolded.

10. A contact lens thread separation and extraction device according to claim 9, characterized in that, The top mold mechanism (830) also includes a guide cylinder (834), through which the top mold column (833) rises.

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