A sorting device for contact lens mold production and a method of using the same

Abstract

This invention discloses a sorting device and its usage method for contact lens mold production, including a frame, an injection molding runner aggregate conveying mechanism and a material handling robot mechanism, as well as a positioning tooling distance changing mechanism, a lower mold frame mechanism, a cutting drive mechanism, an internal expansion cutting mold mechanism, an upper mold frame mechanism, a material hopper mechanism, a valve plate drive mechanism and a valve plate mechanism. Through the coordinated operation of these mechanisms, this invention achieves automated cutting of materials from aggregates, reduces personnel input, thereby lowering labor costs, improving production efficiency, and effectively avoiding material confusion during cutting, ensuring the processing quality of subsequent contact lenses.

Description

Technical Field

[0001] This invention relates to the field of contact lens mold processing technology, and in particular to a sorting device for contact lens mold production and its usage method. Background Technology

[0002] In the process of manufacturing contact lenses, contact lens molds are an essential production tool.

[0003] In order to maximize the production of materials with different grades and dimensions in a single injection molding process, most of the products produced by injection molding machines are petal-shaped parts to be cut. These petal-shaped parts include runner bar aggregate and materials distributed in a ring at equal intervals on the runner bar. Each material has a different degree. The materials need to be cut off from the aggregate and then stored and transported separately according to the different degrees.

[0004] However, current material cutting is mostly done manually or semi-automatically. Manual cutting is inefficient and can lead to mixing of materials with different cutting cuts. Semi-automatic sorting requires manual assistance from the machine, which is also inefficient. Therefore, it is necessary to improve this structure to overcome these shortcomings. Summary of the Invention

[0005] The purpose of this invention is to provide a sorting device for contact lens mold production and its usage method, so as to solve the problems mentioned in the background art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows:

[0007] A sorting device for contact lens mold production includes a frame, an injection runner aggregate conveying mechanism, and a material handling robot mechanism, and further includes:

[0008] The positioning fixture pitch-changing mechanism is installed in the frame and corresponds to the position of the material handling robot mechanism. It is used to drive the workpiece to be cut to rotate and adjust the spacing between the workpieces to be cut.

[0009] The lower mold frame mechanism is fixedly installed on the top of the machine frame;

[0010] The lower mold frame mechanism includes: a pair of lower mold frames, each of which is fixedly installed in the frame and corresponds to the position of the positioning tooling pitch-changing mechanism. The top of the lower mold frame is provided with a groove.

[0011] The cutting drive mechanism is installed in the lower die frame mechanism to provide power for the cutting operation;

[0012] The internal expansion cutting die mechanism is installed in the lower die frame mechanism and cooperates with the cutting drive mechanism. It can move under the pressure of the cutting drive mechanism, so that its middle part expands outward to fasten the workpiece to be cut.

[0013] The internal expansion cutting die mechanism includes: a pair of internal expansion cutting dies, each internal expansion cutting die being installed in the groove of the corresponding lower die frame, with its top abutting against the cutting drive mechanism;

[0014] Spring 1 is provided in two sets. Each set of spring 1 is installed in the groove of the corresponding lower mold frame and cooperates with the corresponding internal expansion cutting mold.

[0015] The outer protective cover is provided in pairs, each outer protective cover is respectively installed on the corresponding inner expansion cutting mold and extends vertically;

[0016] The eight-sloping-face lower die support core is provided in pairs. Each eight-sloping-face lower die support core is installed in the groove of the corresponding lower die frame and cooperates with the middle part of the corresponding inner expansion cutting die. When the inner expansion cutting die moves down, the eight-sloping-face lower die support core forces the middle part of the inner expansion cutting die to expand outward. When the inner expansion cutting die returns to its original position, the middle part of the inner expansion cutting die loses support and retracts inward.

[0017] The upper mold frame mechanism is installed on the cutting drive mechanism and corresponds to the position of the inner expansion cutting mold mechanism. It can move vertically under the drive of the cutting drive mechanism and is used to cooperate with the inner expansion cutting mold mechanism to cut the material off the aggregate.

[0018] The hopper mechanism is installed at the bottom of the lower mold frame mechanism;

[0019] A valve plate drive mechanism is mounted in the frame;

[0020] A valve plate mechanism is mounted on a valve plate drive mechanism and cooperates with the bottom of the hopper mechanism.

[0021] The positioning fixture pitch-changing mechanism includes: a divider, which is fixedly installed in the frame;

[0022] Drive motor one, whose power output shaft is connected to the power input shaft of the divider;

[0023] The variable pitch slide plate is installed in the frame, and the variable pitch slide plate has an elliptical variable pitch slide.

[0024] The positioning tooling turntable is mounted on the power output shaft of the divider;

[0025] Linear slide rail 1, there are four linear slide rails, each linear slide rail 1 is installed on the top of the positioning fixture turntable and arranged at 90-degree intervals along the circumference of the positioning fixture turntable.

[0026] Positioning fixture one is slidably mounted on a corresponding linear guide rail one via a slider;

[0027] Positioning fixture two is slidably mounted on a corresponding linear guide rail one via a slider;

[0028] Positioning fixture three is slidably mounted onto a corresponding linear guide rail one via a slider;

[0029] Positioning fixture four is slidably mounted on a corresponding linear guide rail one via a slider;

[0030] The positioning tooling cams are provided in four parts. Each positioning tooling cam is rotatably mounted on the bottom of the corresponding positioning tooling 1, positioning tooling 2, positioning tooling 3 and positioning tooling 4, and cooperates with the variable pitch slide. When the positioning tooling turntable drives positioning tooling 1, positioning tooling 2, positioning tooling 3 and positioning tooling 4 to rotate 90 degrees through the positioning tooling cams in the variable pitch slide, positioning tooling 1 and positioning tooling 3 move to the discharge position to discharge material, and positioning tooling 2 and positioning tooling 4 move to the receiving position to receive material. When the positioning tooling turntable rotates 90 degrees again, positioning tooling 1 and positioning tooling 3 rotate to the receiving position to receive material, and positioning tooling 2 and positioning tooling 4 rotate to the discharge position to discharge material.

[0031] The lower mold frame mechanism includes: mold support columns, which are provided in two sets, each set of mold support columns being installed on the top of a corresponding lower mold frame and arranged in a vertical direction;

[0032] The electric cylinder fixing plate is provided in pairs, and each electric cylinder fixing plate is connected to the top of the corresponding set of mold support columns.

[0033] The cutting drive mechanism includes: a pair of cutting electric cylinders, each of which is installed in a corresponding electric cylinder fixing plate and extends in the vertical direction;

[0034] The electric cylinder drive servo motor is provided in pairs, and each electric cylinder drive servo motor is connected to the power input terminal of the corresponding cutting electric cylinder;

[0035] The lower die expansion drive cylinder is provided in pairs. Each lower die expansion drive cylinder is installed on the upper end face of the corresponding cutting electric cylinder and extends in the vertical direction.

[0036] The connecting rods are provided in two pairs, and each pair of connecting rods is connected to the piston head of the corresponding lower mold expansion drive cylinder;

[0037] The pressure plate is provided in pairs, with each pressure plate connected to the bottom of two corresponding connecting rods and located above the lower mold frame.

[0038] The upper mold frame mechanism includes: guide pillars, which are provided in two pairs, each pair of guide pillars being installed in the corresponding lower mold frame and extending in the vertical direction;

[0039] The upper mold frame is provided in pairs. Each upper mold frame is fixedly connected to the power output shaft of the corresponding cutting electric cylinder. Both ends of the upper mold frame are slidably fitted onto the corresponding guide post through guide sleeves. Each upper mold frame is provided with a back-blowing airflow channel, which runs through the upper mold frame.

[0040] Spring 2, which is provided in pairs, with each spring 2 respectively installed in the corresponding upper mold frame;

[0041] The elastic pressure head is provided in pairs, each elastic pressure head is installed in the corresponding upper mold frame and abuts against the bottom of the corresponding spring two. The elastic pressure head can move in the vertical direction.

[0042] The upper cutting blade is provided in two sets. Each set of upper cutting blades is installed in a corresponding upper mold frame and corresponds to the position of the corresponding internal expansion cutting mold. Each upper cutting blade is provided with an air outlet, which is connected to the back-blowing airflow channel.

[0043] Spring 3, which has two pairs, with each pair of spring 3 respectively sleeved on a corresponding pair of guide posts.

[0044] The material hopper mechanism includes: a pair of material flow channels, each material flow channel being installed at the bottom of the corresponding lower mold frame, with its feeding end connected to the cutting station of the internal expansion cutting mold;

[0045] The material bins are provided in two sets, each set of bins is installed in the frame, and each bin has a through slot, the top of which is connected to the discharge end of the corresponding material flow channel.

[0046] One hopper cover is provided, and each hopper cover is installed in the frame and located above the corresponding hopper;

[0047] Two hopper covers are provided, each hopper cover is installed in the frame and located above the corresponding hopper.

[0048] The valve plate drive mechanism includes:

[0049] Servo motor one, which is fixedly mounted on the frame and arranged horizontally;

[0050] The first transmission belt structure is mounted on the frame and connected to the power output shaft of the first servo motor.

[0051] Drive shaft one is rotatably mounted in the frame, and one end is connected to drive belt structure one;

[0052] Synchronous pulley 1, wherein there is a pair of synchronous pulleys 1, and each synchronous pulley 1 is respectively installed at both ends of the transmission shaft 1;

[0053] The second drive shaft is rotatably mounted in the frame;

[0054] Synchronous pulley two, which is provided in pairs, each of the synchronous pulley two is respectively installed at both ends of the transmission shaft two and corresponds to the position of synchronous pulley one;

[0055] Synchronous belt 1, which is provided in pairs, with one end of each synchronous belt 1 sleeved on the corresponding synchronous pulley 1, and the other end sleeved on the corresponding synchronous pulley 2;

[0056] Linear slide rail 2, which is provided in pairs, with each linear slide rail 2 being installed on the frame;

[0057] The valve plate mechanism includes: a split valve plate 1, the two ends of which are fixedly installed on the upper belts of the two synchronous belts 1 respectively. It is located at the bottom of the hopper and slides with the corresponding linear slide rail 2 through a slider.

[0058] The second valve plate is fixedly installed at both ends on the lower belt of the two synchronous belts, located at the bottom of the hopper, and slides with the corresponding linear slide rail through a slider.

[0059] The material handling robot mechanism includes: a linear motion module, which is fixedly mounted on the frame;

[0060] Linear motion module two is fixedly mounted on the frame;

[0061] The module is connected in parallel with one end of a power input shaft to the linear motion module one and the other end to the power input shaft to the linear motion module two.

[0062] A transverse drive servo motor is mounted on linear motion module one, and its power output shaft is connected to the power input shaft of linear motion module one.

[0063] The crossbeam of the material handling robot is fixedly connected at both ends to the moving ends of linear motion module one and linear motion module two, respectively.

[0064] The upper and lower cylinders are provided in pairs, and each upper and lower cylinder is installed on the crossbeam of the material handling robot and corresponds to the position of the internal expansion cutting mold.

[0065] The suction cup holders are provided in pairs, and each suction cup holder is respectively installed at the end of the piston rod of the corresponding upper and lower cylinders;

[0066] The vacuum suction cups are provided in two sets, with each set of vacuum suction cups installed in a corresponding suction cup holder.

[0067] The method of using the sorting device for contact lens mold production mentioned above includes the following steps:

[0068] A1: Place the two pieces to be cut into the positioning fixture pitch-changing mechanism. The positioning fixture pitch-changing mechanism drives the two pieces to be cut to rotate 90 degrees and widens the distance between the two pieces to be cut, so that their positions are adapted to the material handling robot mechanism.

[0069] A2: The pick-and-place robot moves to above the workpiece to be cut, adsorbs the workpiece, and moves the workpiece to above the internal expansion cutting mold mechanism. Then, it releases the workpiece and places it into the internal expansion cutting mold mechanism. The pick-and-place robot then resets.

[0070] A3: The cutting drive mechanism starts, which drives the internal expansion cutting mold mechanism to move down. During the downward movement, the middle of the internal expansion cutting mold expands and fastens the workpiece to be cut. Then the upper mold frame mechanism moves down and cooperates with the internal expansion cutting mold mechanism to cut the material off the aggregate. High-pressure air is blown out from the back-blowing airflow channel in the upper mold frame mechanism to blow the material into the hopper mechanism.

[0071] A4: The upper mold frame mechanism and the inner expansion cutting mold are reset. The material handling robot moves toward the inner expansion cutting mold mechanism to remove the remaining aggregate in the inner expansion cutting mold mechanism and transfer it to the injection runner aggregate conveying mechanism. The injection runner aggregate conveying mechanism then sends the aggregate out of the frame.

[0072] A5: The materials that fall off during cutting are moved to the silo mechanism and stored separately;

[0073] A6: When discharging material, the valve plate drive mechanism moves the valve plate mechanisms away from each other, causing the valve plate mechanisms to release the seal on the bottom of the hopper mechanism. The bottom of the hopper mechanism opens, allowing the material to be discharged from the hopper and fall into the AGV trolley. Subsequently, the valve plate drive mechanism moves the valve plate mechanisms closer to each other, closing the bottom of the hopper mechanism, and the device prepares for the next round of operation.

[0074] The advantages of this invention are as follows: Through the coordinated operation of various mechanisms, this invention achieves automated cutting of materials from aggregates, reduces personnel input, thereby reducing labor costs, improving production efficiency, and effectively avoiding material confusion during cutting, thus ensuring the processing quality of subsequent contact lenses. Attached Figure Description

[0075] Figure 1 This is a perspective view of the sorting device for contact lens mold production proposed in this invention.

[0076] Figure 2 This is one of the structural schematic diagrams of the injection molding runner aggregate conveying line proposed in this invention.

[0077] Figure 3 This is one of the structural schematic diagrams of the second injection molding runner aggregate conveying line proposed in this invention.

[0078] Figure 4 This is one of the structural schematic diagrams of the positioning tooling turntable proposed in this invention.

[0079] Figure 5 This invention is proposed. Figure 4 A magnified view of a portion of point A in the middle.

[0080] Figure 6 This is one of the structural schematic diagrams of the positioning fixture proposed in this invention.

[0081] Figure 7 This is one of the structural schematic diagrams of the positioning fixture II proposed in this invention.

[0082] Figure 8 This is one of the structural schematic diagrams of the variable pitch slide plate proposed in this invention.

[0083] Figure 9 This is one of the structural schematic diagrams of the material flow channel proposed in this invention.

[0084] Figure 10 This is one of the structural schematic diagrams of the cutting electric cylinder proposed in this invention.

[0085] Figure 11 This is one of the structural schematic diagrams of the lower mold frame proposed in this invention.

[0086] Figure 12 This is one of the structural schematic diagrams of the outer protective cover proposed in this invention.

[0087] Figure 13 This is the second schematic diagram of the outer protective cover proposed in this invention.

[0088] Figure 14 This is one of the structural schematic diagrams of the internal expansion cutting mold proposed in this invention.

[0089] Figure 15 This is a cross-sectional view of the internal expansion cutting die proposed in this invention.

[0090] Figure 16 This invention is proposed. Figure 15 A magnified view of a section at point B in the middle.

[0091] Figure 17 This is one of the structural schematic diagrams of the cutting upper blade proposed in this invention.

[0092] Figure 18 This is a cross-sectional view of the upper mold frame proposed in this invention.

[0093] Figure 19 This is one of the structural schematic diagrams of the servo motor proposed in this invention.

[0094] Figure 20 This is one of the structural schematic diagrams of the synchronous belt pulley proposed in this invention.

[0095] Figure 21 This is one of the structural schematic diagrams of the silo proposed in this invention.

[0096] Figure 22 This is one of the structural schematic diagrams of the split valve plate proposed in this invention.

[0097] Numerical labels: Frame 100, Divider 101, Drive Motor 102, Variable Pitch Slide Plate 103, Variable Pitch Slide 1031, Positioning Fixture Turntable 104, Linear Slide Rail 105, Positioning Fixture 106, Positioning Fixture 2 107, Positioning Fixture 3 108, Positioning Fixture 4 109, Positioning Fixture Cam 110, Lower Mold Set 201, Groove 2011, Mold Support 202, Electric Cylinder Fixing Plate 203, Cutting Electric Cylinder 301 Electric cylinder driven servo motor 302, lower mold expansion drive cylinder 303, connecting rod 304, pressure plate 305, internal expansion cutting mold 306, fastening part 3061, fastening surface 3062, spring one 307, outer protective cover 308, eight-sloped lower mold support inner core 309, inclined surface 3091, guide post 401, upper mold frame 402, back-blowing air channel 4021, spring two 403, elastic pressure head 404, cutting upper blade 405, air outlet 4 051, Spring 3; 406, Material Flow Channel; 501, Hopper; 502, Through Slot 1; 5021, Hopper Cover Plate 1; 503, Hopper Cover Plate 2; 504, Servo Motor 1; 601, Transmission Belt Structure 1; 602, Synchronous Belt Pulley 3; 6021, Synchronous Belt Pulley 4; 6022, Synchronous Belt 2; 6023, Tensioner Pulley 1; 6024, Transmission Shaft 1; 603, Synchronous Belt Pulley 1; 604, Transmission Shaft 2; 605, Synchronous Belt Pulley 2; 606, Synchronous Belt 1; 607 Linear slide rail 2 608, tensioning wheel 2 609, split valve plate 1 701, split valve plate 2 702, linear motion module 1 801, linear motion module 2 802, module parallel connecting rod 803, transverse drive servo motor 804, material handling robot beam 805, upper and lower cylinders 806, suction cup frame 807, vacuum suction cup 808, injection molding runner aggregate conveying line 1 901, injection molding runner aggregate conveying line 2 902, conveying plate 903. Detailed Implementation

[0098] like Figure 1-22 As shown, the present invention proposes a sorting device for contact lens mold production, including a frame, an injection molding runner aggregate conveying mechanism, and a material handling robot mechanism. The injection molding runner aggregate conveying mechanism is installed in the frame and conveys aggregate to the outside of the frame. The material handling robot mechanism is installed in the frame and drives the parts to be cut to move.

[0099] It also includes a positioning fixture pitch-changing mechanism, a lower mold frame mechanism, a cutting drive mechanism, an internally expanding cutting mold mechanism, an upper mold frame mechanism, a material hopper mechanism, a valve plate drive mechanism, and a valve plate mechanism. The positioning fixture pitch-changing mechanism is installed in the frame and corresponds to the position of the material handling robot mechanism. It is used to drive the workpiece to be cut to rotate and adjust the spacing between the workpieces. The lower mold frame mechanism is fixedly installed on the top of the frame and corresponds to the position of the positioning fixture pitch-changing mechanism. It is used to support the other mechanisms. The cutting drive mechanism is installed in the lower mold frame mechanism and provides power for the cutting operation. The internally expanding cutting mold mechanism is installed in the lower mold frame mechanism and cooperates with the cutting drive mechanism. It can move vertically under the pressure of the cutting drive mechanism. The upper mold frame mechanism is connected to the power output end of the cutting drive mechanism and corresponds to the position of the inner expansion cutting mold mechanism. It can move vertically under the drive of the cutting drive mechanism to cooperate with the inner expansion cutting mold mechanism to cut the material from the aggregate. The hopper mechanism is installed at the bottom of the lower mold frame mechanism and is connected to the cutting station of the inner expansion cutting mold mechanism. It is used to classify and store the cut material. The valve plate drive mechanism is installed in the frame and provides power for opening and closing the bottom of the hopper mechanism. The valve plate mechanism is driven to the moving end of the valve plate drive mechanism and cooperates with the bottom of the hopper mechanism. The valve plate mechanism opens or closes the bottom of the hopper mechanism.

[0100] In this embodiment, the positioning fixture pitch-changing mechanism includes a divider 101, a drive motor 102, a pitch-changing slide plate 103, a positioning fixture turntable 104, a linear slide rail 105, a positioning fixture 106, a positioning fixture 2 107, a positioning fixture 3 108, a positioning fixture 4 109, and a positioning fixture cam 110. The divider 101 is fixedly installed in the frame 100 and is used to output continuous rotational power as intermittent rotational power. The power output shaft of the drive motor 102 is connected to the power input shaft of the divider 101 to provide continuous rotational power to the divider 101. The pitch-changing slide plate 103 is fixedly installed in the frame 100, and the pitch-changing slide plate 103 has openings in it. A variable-pitch slide groove 1031 is provided, and the shape of the variable-pitch slide groove 1031 is elliptical. The positioning fixture turntable 104 is fixedly installed on the power output shaft of the divider 101 and can rotate intermittently by 90 degrees with the power output shaft of the divider 101. Four linear slide rails 105 are provided, each of which is fixedly installed on the top of the positioning fixture turntable 104 and arranged at 90-degree intervals along the circumference of the positioning fixture turntable 104. The positioning fixture 106 is slidably mounted on a corresponding linear slide rail 105 via a slider and is used for bearing and positioning the workpiece to be cut. The positioning fixture 107 is slidably mounted on a corresponding linear slide rail 105 via a slider. 05; The third positioning fixture 108 is slidably mounted on a corresponding linear slide rail 105 via a slider, and is on the same straight line as the first positioning fixture 106, and is located at both ends of the positioning fixture turntable 104; The fourth positioning fixture 109 is slidably mounted on a corresponding linear slide rail 105 via a slider, and is on the same straight line as the second positioning fixture 107, and is located at both ends of the positioning fixture turntable 104, and is used for bearing and positioning the workpiece to be cut; There are four positioning fixture cams 110, and each positioning fixture cam 110 is rotatably mounted on the first positioning fixture 106, the second positioning fixture 107, and the third positioning fixture 108. The bottom of fixture 108 and positioning fixture 109 are fitted with a variable pitch slide 1031. The positioning fixture cam 110 can slide in the variable pitch slide 1031, thereby driving positioning fixtures 106, 107, 108, and 109 to slide along linear slide rail 105 and variable pitch slide 1031, achieving intermittent rotation and pitch adjustment. When the positioning fixture turntable 104 drives positioning fixtures 106, 107, 108, and 109 to rotate 90 degrees in the variable pitch slide 1031 via the positioning fixture cam 110, positioning fixtures 106 and 108 rotate and are pulled apart to the discharge position (i.e., Figure 6 The material is discharged from the position of positioning fixture 2 (107) and positioning fixture 4 (109). Positioning fixture 2 (107) and positioning fixture 4 (109) rotate and pull closer to the receiving position (i.e., Figure 6The positioning fixtures 1 and 3 are positioned to receive the material. When the positioning fixture turntable 104 rotates 90 degrees again, the positioning fixtures 106 and 3108 rotate again and are pulled closer to the receiving position to receive the material. The positioning fixtures 2107 and 4109 rotate again and are pulled apart to the discharge position to discharge the material.

[0101] The lower mold frame mechanism includes a lower mold frame 201, mold support columns 202, and an electric cylinder fixing plate 203. There is a pair of lower mold frames 201, each of which is fixedly installed in the frame 100 and corresponds to the position of the positioning tooling pitch-changing mechanism. The top of the lower mold frame 201 is provided with a groove 2011. There are two sets of mold support columns 202, each set of which is installed on the top of a corresponding lower mold frame 201 and extends vertically. There are four in each set. There is a pair of electric cylinder fixing plates 203, each of which is fixedly connected to the top of a corresponding set of mold support columns 202.

[0102] The cutting drive mechanism includes a cutting electric cylinder 301, an electric cylinder drive servo motor 302, a lower die expansion drive cylinder 303, a connecting rod 304, and a pressure plate 305. A pair of cutting electric cylinders 301 are provided, each mounted in a corresponding electric cylinder fixing plate 203 and extending vertically. A pair of electric cylinder drive servo motors 302 are provided, with the output end of each motor connected to the power input end of the corresponding cutting electric cylinder 301 to provide power to it. A pair of lower die expansion drive cylinders 303 are provided. Each lower die expansion drive cylinder 303 is respectively installed on the upper end face of the cylinder body of the corresponding cutting electric cylinder 301 and extends in the vertical direction; there are two pairs of connecting rods 304, each pair of connecting rods 304 is fixedly connected to the piston head of the corresponding lower die expansion drive cylinder 303, and the connecting rods 304 can move in the vertical direction under the drive of the lower die expansion drive cylinder 303; there is one pair of pressure plates 305, each pressure plate 305 is connected to the bottom of the two corresponding connecting rods 304, it is located above the lower die frame 201, and can move in the vertical direction under the drive of the connecting rods 304.

[0103] The internal expansion cutting die mechanism includes an internal expansion cutting die 306, a spring 307, an outer protective cover 308, and an eight-sloped lower die support core 309. A pair of internal expansion cutting dies 306 are provided, each internal expansion cutting die 306 being installed in a groove 2011 of a corresponding lower die frame 201. Its top abuts against a pressure plate 305, and it can move vertically downwards under the drive of the pressure plate 305. Each internal expansion cutting die 306 has eight fastening parts 3061 in its middle, with the fastening parts 3061 facing the material. The end has a fastening surface 3062. When the inner-expansion cutting mold 306 moves downward, the fastening part 3061 expands outward to fasten the material. When the inner-expansion cutting mold 306 moves upward to reset, the fastening part 3061 retracts inward to release the locking of the material. Two sets of springs 307 are provided, each set of springs 307 is installed in the corresponding groove 2011 of the lower mold frame 201 and abuts against the corresponding inner-expansion cutting mold 306 to drive the inner-expansion cutting mold 306 to reset upward. Each set of springs 307 has four springs. The outer protective cover 308 is provided in pairs, each outer protective cover 308 is respectively installed on the corresponding inner expansion cutting mold 306 and extends vertically to limit the material falling during cutting; the eight-sloping-face lower mold support inner core 309 is provided in pairs, each eight-sloping-face lower mold support inner core 309 is respectively fixedly installed in the groove 2011 of the corresponding lower mold frame 201 and abuts against the middle fastening part 3061 of the corresponding inner expansion cutting mold 306, and the top of each eight-sloping-face lower mold support inner core 309 has eight inclined surfaces opened circumferentially. 3091, the inclined surface 3091 abuts against the inner side of the fastening part 3061; when the inner expansion cutting die 306 moves downward, the inner side of the fastening part 3061 of the inner expansion cutting die 306 contacts the inclined surface 3091 of the eight inclined lower die support inner core 309, and the inclined surface 3091 forces the fastening part 3061 to expand radially to fasten the workpiece to be cut, thereby cooperating with the upper cutting blade 405 to cut the material off the aggregate. When the inner expansion cutting die 306 returns to its original position, the middle part of the inner expansion cutting die 306 loses support and retracts inward.

[0104] The upper mold frame mechanism includes guide posts 401, an upper mold frame 402, a second spring 403, an elastic pressure head 404, a cutting upper blade 405, and a third spring 406. Two pairs of guide posts 401 are provided, each pair of guide posts 401 being installed in a corresponding lower mold frame 201 and extending vertically. One pair of upper mold frames 402 are provided, each upper mold frame 402 being fixedly connected to the power output shaft of a corresponding cutting electric cylinder 301. They can move vertically under the drive of the cutting electric cylinder 301, with both ends slidingly engaged with the corresponding guide posts 401 via guide sleeves. The guide sleeves are fixedly connected to the upper mold frame 402. Each upper mold frame 402 has openings... A back-blowing airflow channel 4021 is provided, which vertically extends through the upper mold frame 402. The back-blowing airflow channel 4021 of the upper mold frame 402 is connected to a blower via a pipeline. High-pressure air can be blown out of the back-blowing airflow channel 4021 of the upper mold frame 402 to blow the cut material downwards. The connection of the back-blowing airflow channel 4021 to the blower via a pipeline is existing technology and will not be described in detail here. A pair of springs 403 are provided, and each spring 403 is respectively installed in the corresponding upper mold frame 402. A pair of elastic pressure heads 404 are provided, and each elastic pressure head 404 is respectively installed in the corresponding upper mold frame 402. The elastic pressure head 404 can reciprocate vertically, and is in contact with the bottom of the corresponding spring 403. The spring 403 above it provides pre-pressure, causing the elastic pressure head 404 to position the workpiece against the upper surface of the eight-sloped lower die support core 309. Two sets of cutting upper blades 405 are provided, each set containing eight blades. Each set of cutting upper blades 405 is installed in the corresponding upper die frame 402 and corresponds to the position of the corresponding internal expansion cutting die 306. These blades cooperate with the internal expansion cutting die 306 to cut the material from the aggregate, and the lower end of the cutting upper blade 405 is higher than the elastic pressure head. At the lower end of head 404, the elastic pressure head 404 first abuts and fixes the aggregate, and then the upper cutting blade 405 cuts the material. Each upper cutting blade 405 is provided with an air outlet 4051, which is connected to the back-blowing airflow channel 4021. The air outlet 4051 blows the high-pressure air in the back-blowing airflow channel 4021 toward the material, so as to drive the material that has fallen off the cutting to move downward. There are two pairs of springs 406. Each pair of springs 406 is respectively sleeved on a pair of guide posts 401. One end of the springs abuts against the lower mold frame 201, and the other end abuts against the guide sleeve. They are used to assist the upper mold frame 402 to return to its original position smoothly after cutting.

[0105] The hopper mechanism includes a material flow channel 501, a hopper 502, a first hopper cover 503, and a second hopper cover 504. A pair of material flow channels 501 are provided, each installed at the bottom of its corresponding lower mold frame 201. Their inlet ends are connected to the cutting station of the internal expansion cutting mold 306, used to guide and convey materials falling during cutting. Two sets of hoppers 502 are provided, each set installed in the frame 100, with their bottoms suspended to facilitate the opening and closing of the bottom valve plate mechanism and the smooth discharge of materials. Each hopper 502 has a through slot. 5021, the top of the channel 5021 is connected to the discharge end of the corresponding material flow channel 501, and the hopper 502 is used to store materials; a pair of hopper cover plates 503 are provided, each hopper cover plate 503 is installed in the frame 100 and located above the corresponding hopper 502; a pair of hopper cover plates 504 are provided, each hopper cover plate 504 is installed in the frame 100 and located above the corresponding hopper 502, and the hopper cover plates 504 and hopper cover plates 503 are spliced ​​together from left to right to prevent materials from being blown out of the hopper 502 by high-pressure air.

[0106] The valve plate drive mechanism includes a servo motor 601, a transmission belt structure 602, a transmission shaft 603, a synchronous pulley 604, a second transmission shaft 605, a second synchronous pulley 606, a first synchronous belt 607, and a second linear guide rail 608. The servo motor 601 is fixedly mounted on the frame 100 and arranged laterally. The transmission belt structure 602 is mounted in the frame 100 and connected to the power output shaft of the servo motor 601. The transmission shaft 603 is rotatably mounted in the frame 100, with one end connected to the output end of the transmission belt structure 602. The servo motor 601 can drive the transmission shaft 603 to rotate via the transmission belt structure 602. A pair of synchronous pulleys 604 are provided, each with a... 604 is respectively installed at both ends of the first drive shaft 603; the second drive shaft 605 is rotatably installed in the frame 100 and arranged parallel to the first drive shaft 603; a pair of second synchronous pulleys 606 are provided, each second synchronous pulley 606 is respectively installed at both ends of the second drive shaft 605 and is in the same straight line as the corresponding first synchronous pulley 604; a pair of first synchronous belts 607 are provided, one end of each first synchronous belt 607 is wound around the corresponding first synchronous pulley 604, and the other end is wound around the corresponding second synchronous pulley 606; a pair of second linear slide rails 608 are provided, each second linear slide rail 608 is respectively installed on the frame 100 and arranged parallel to the corresponding first synchronous belt 607, used to limit the valve plate mechanism.

[0107] In this embodiment, the transmission belt structure 602 includes a synchronous pulley 6021, a synchronous pulley 6022, a synchronous belt 6023, and a tensioning pulley 6024. The synchronous pulley 6021 is fixedly mounted on the power output shaft of the servo motor 601 and can rotate synchronously with the power output shaft of the servo motor 601. The synchronous pulley 6022 is fixedly mounted on the transmission shaft 603. One end of the synchronous belt 6023 is wound around the synchronous pulley 6021, and the other end is wound around the synchronous pulley 6022. When the synchronous pulley 6021 rotates, it drives the synchronous pulley 6022 to rotate through the synchronous belt 6023. The tensioning pulley 6024 is mounted on the frame 100 and contacts the outer surface of the synchronous belt 6023. The tensioning pulley 6024 is used to ensure the tension of the synchronous belt 6023.

[0108] The valve plate drive mechanism also includes a tensioning wheel 609, which is rotatably mounted in the frame 100 and contacts the outer side of the timing belt 607. The tensioning wheel 609 is used to ensure the tension of the timing belt 607.

[0109] The valve plate mechanism includes a first split valve plate 701 and a second split valve plate 702. The two ends of the first split valve plate 701 are respectively fixedly installed on the upper belt body of the two first synchronous belts 607. It is located at the bottom of the hopper 502 and slides with the corresponding second linear slide rail 608 through a slider. The first split valve plate 701 seals the bottom of the corresponding hopper 502. The two ends of the second split valve plate 702 are respectively fixedly installed on the lower belt body of the two first synchronous belts 607. It is located at the bottom of the hopper 502 and slides with the corresponding second linear slide rail 608 through a slider. The second split valve plate 702 seals the bottom of the corresponding hopper 502.

[0110] The material handling robot mechanism includes a linear motion module one 801, a linear motion module two 802, a parallel linkage 803, a transverse drive servo motor 804, a material handling robot beam 805, upper and lower cylinders 806, a suction cup frame 807, and a vacuum suction cup 808. The linear motion module one 801 is fixedly mounted on the frame 100; the linear motion module two 802 is fixedly mounted on the frame 100 and arranged parallel to the linear motion module one 801; one end of the parallel linkage 803 is connected to the power input shaft of the linear motion module one 801. The other end is connected to the power input shaft of the second linear motion module 802. When the power input shaft of the first linear motion module 801 rotates, it can drive the power input shaft of the second linear motion module 802 to rotate synchronously through the module parallel connecting rod 803. The transverse drive servo motor 804 is fixedly installed on the first linear motion module 801, and its power output shaft is connected to the power input shaft of the first linear motion module 801, which can synchronously drive the moving ends of the first linear motion module 801 and the second linear motion module 802 to move. The two ends of the picking robot beam 805 are respectively connected to the first linear motion module 801. The lifting robot beam 805 is fixedly connected to the moving end of the linear motion module 801 and the linear motion module 802. A pair of upper and lower cylinders 806 are provided, each mounted on the lifting robot beam 805 and corresponding to the position of the internal expansion cutting mold 306. A pair of suction cup frames 807 are provided, each mounted on the piston rod end of the corresponding upper and lower cylinder 806. The suction cup frame 807 can move up and down under the drive of the upper and lower cylinders 806. Two sets of vacuum suction cups 808 are provided, each set... Nine vacuum suction cups 808 are provided, and each set of vacuum suction cups 808 is installed in a corresponding suction cup frame 807. The vacuum suction cups 808 are connected to a negative pressure fan through a pipeline. The vacuum suction cups 808 can adsorb and release the workpiece to be cut. The connection between the vacuum suction cups 808 and the negative pressure fan through the pipeline is existing technology and will not be described in detail here. The linear motion module one 801 and linear motion module two 802 are preferably synchronous belt linear modules. The specific connection structure and control method of the module with the transverse drive servo motor 804 and the module parallel connecting rod 803 are well known technologies in the field and will not be described in detail here.

[0111] In this embodiment, the injection molding aggregate conveying mechanism includes an injection molding aggregate conveying line 901, an injection molding aggregate conveying line 902, and a conveying plate 903. The injection molding aggregate conveying line 901 is installed in the frame 100 and conveys the aggregate. The injection molding aggregate conveying line 902 is installed in the frame 100 and located at the discharge end of the injection molding aggregate conveying line 901. The conveying plate 903 is installed in the frame 100 and located at the discharge end of the injection molding aggregate conveying line 902, and sends the aggregate out of the frame 100. The injection molding aggregate conveying lines 901 and 902 adopt a conveyor belt structure, which is existing technology and will not be described in detail here.

[0112] The method of using the sorting device for contact lens mold production mentioned above includes the following steps:

[0113] A1: Positioning and pitch adjustment: Place the two parts to be cut into positioning fixture 106 and positioning fixture 3 108 respectively. Start drive motor 102, which drives the power output shaft of divider 101 to rotate intermittently by 90 degrees, thereby driving the positioning fixture turntable 104 to rotate by 90 degrees. The positioning fixture turntable 104 drives the positioning fixtures 106, 107, 108, and 109 to rotate via the linear slide rail 105. During rotation, the positioning fixture cams 110 at the bottom of the positioning fixtures 106, 107, 108, and 109 slide in the variable pitch slide groove 1031 of the variable pitch slide plate 103. At the same time, the linear slide rail 105 limits the positioning fixtures 106, 107, 108, and 109, causing them to move along the corresponding linear slide rails. After rotating 90 degrees, positioning fixture 106 and positioning fixture 3108 move to the original positions of positioning fixture 2107 and positioning fixture 4109, and the distance between them is increased and adjusted to correspond to the position of suction cup frame 807. Positioning fixture 2107 and positioning fixture 4109 move to the original positions of positioning fixture 106 and positioning fixture 3108 for subsequent material receiving.

[0114] A2: Material Picking and Loading: The transverse drive servo motor 804 drives the moving end of the linear motion module 1 801 to move, and through the module parallel connecting rod 803, it drives the moving end of the linear motion module 2 802 to move synchronously, thereby driving the picking robot beam 805 to move to the picking position. The upper and lower cylinders 806 push the suction cup frame 807 and the vacuum suction cup 808 downward, and the vacuum suction cup 808 picks up the workpiece to be cut. Subsequently, the picking robot beam 805 drives the vacuum suction cup 808 and the workpiece to be cut to move above the inner expansion cutting mold 306, and the vacuum suction cup 808 releases the workpiece to be cut and places it into the inner expansion cutting mold 306;

[0115] A3: Cutting and Blowing: The lower die expansion drive cylinder 303 drives the connecting rod 304 and the pressure plate 305 to move downwards, and the pressure plate 305 presses against the inner expansion cutting die 306. The inner expansion cutting die 306 moves downwards, compressing the first spring 307, and at the same time, its fastening part 3061 contacts the inclined surface 3091 of the eight-sloped lower die support inner core 309. Under the push of the inclined surface 3091, the fastening part 3061 expands radially, fastening the workpiece to be cut and achieving fixation. Subsequently, the cutting electric cylinder 301 drives the upper die frame 402 to move downwards. When the upper die frame 402 moves, the guide sleeve and guide post 401 cooperate to guide and limit its movement. The upper die frame 402 drives the elastic pressure head 404 to abut against the top of the aggregate. At this time, the elastic pressure head 404 compresses the second spring 403 to generate a reverse elastic force, pressing the workpiece to be cut against the upper end face of the eight-sloped lower die support inner core 309. Subsequently, the upper cutting blade 405 continues to move downward, cooperating with the internal expansion cutting die 306 to cut the material off the aggregate. At the same time, high-pressure gas is delivered from the back-blowing airflow channel 4021 to the air outlet 4051 and blown out, blowing the cut material into the material flow channel 501;

[0116] A4: Reset and Waste Removal: The lower mold expansion drive cylinder 303 drives the connecting rod 304 and the pressure plate 305 to move upward and reset. After the downward pressure is lost, the spring 307 deforms and resets, driving the internal expansion cutting mold 306 to reset upward, and the fastening part 3061 retracts inward. At the same time, the cutting electric cylinder 301 drives the upper mold frame 402, the elastic pressure head 404 and the upper cutting blade 405 to reset. Subsequently, the picking robot beam 805 drives the vacuum suction cup 808 to move above the aggregate, and the vacuum suction cup 808 picks up the aggregate. The picking robot beam 805 drives the vacuum suction cup 808 and the aggregate to move above the injection runner aggregate conveying line 901, and the vacuum suction cup 808 releases the aggregate, causing it to fall into the injection runner aggregate conveying line 901. Injection runner aggregate conveying line 1 901 transfers aggregate to injection runner aggregate conveying line 2 902, which then conveys the aggregate to conveyor plate 903, and finally the conveyor plate 903 discharges the aggregate from the frame 100.

[0117] A5: Material sorting and storage: The materials that fall off during cutting are transported to the corresponding silos 502 through the material flow channel 501 for sorting and storage;

[0118] A6: Discharge and Reset: During discharge, servo motor 601 drives synchronous pulley 6021 to rotate, which in turn drives synchronous pulley 6022 via synchronous belt 6023. Synchronous pulley 6022 drives drive shaft 603 and synchronous pulley 604 to rotate. Synchronous pulley 604 drives synchronous pulley 606 via synchronous belt 607. When synchronous belt 607 moves, it moves valve plates 701 and 702 away from each other, thereby opening the bottom of hopper 502 and releasing the seal. The material falls out of hopper 502 into the AGV, which then transports it to the next production station. After the material is unloaded, servo motor 601 drives synchronous pulley 6021 to reverse, which in turn drives synchronous belt 6023, synchronous pulley 6022, drive shaft 603, synchronous pulley 604, and synchronous belt 607 in reverse order. This drives valve plates 701 and 702 to move closer together, to the bottom of hopper 502, and seals them. The equipment then proceeds to the next round of cutting, sorting, and storage operations.

[0119] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are used only for the convenience of describing this invention and for 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 invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0120] Any descriptions not covered in the above specific embodiments of the present invention are known technologies in the field and can be implemented with reference to such known technologies.

[0121] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A sorting device for contact lens mold production, comprising a rack (100), an injection runner aggregate conveying mechanism and a pick-and-place mechanism, characterized in that, Also includes: The positioning fixture pitch-changing mechanism is installed in the frame (100) and corresponds to the position of the material handling robot mechanism. It is used to drive the workpiece to be cut to rotate and adjust the spacing between the workpieces to be cut. The lower mold frame mechanism is fixedly installed on the top of the frame (100); The lower mold frame mechanism includes: The lower mold frame (201) is provided in pairs. Each lower mold frame (201) is fixedly installed in the frame (100) and corresponds to the position of the positioning tooling pitch changing mechanism. The top of the lower mold frame (201) is provided with a groove (2011). The cutting drive mechanism is installed in the lower die frame mechanism to provide power for the cutting operation; The internal expansion cutting die mechanism is installed in the lower die frame mechanism and cooperates with the cutting drive mechanism. It can move under the pressure of the cutting drive mechanism, so that its middle part expands outward to fasten the workpiece to be cut. The internal expansion cutting die mechanism includes: An internal expansion cutting die (306) is provided in pairs, each internal expansion cutting die (306) is respectively installed in the groove (2011) of the corresponding lower die frame (201), and its top abuts against the cutting drive mechanism; Spring 1 (307) is provided in two sets. Each set of spring 1 (307) is installed in the groove (2011) of the corresponding lower mold frame (201) and cooperates with the corresponding internal expansion cutting mold (306). Outer protective cover (308), which is provided in pairs, each outer protective cover (308) is respectively installed on the corresponding inner expansion cutting mold (306) and extends vertically; An eight-sloping-faced lower die support core (309) is provided in pairs. Each eight-sloping-faced lower die support core (309) is installed in the groove (2011) of the corresponding lower die frame (201) and cooperates with the middle part of the corresponding inner expansion cutting die (306). When the inner expansion cutting die (306) moves down, the eight-sloping-faced lower die support core (309) forces the middle part of the inner expansion cutting die (306) to expand outward. When the inner expansion cutting die (306) returns to its original position, the middle part of the inner expansion cutting die (306) loses support and retracts inward. The upper mold frame mechanism is installed on the cutting drive mechanism and corresponds to the position of the inner expansion cutting mold mechanism. It can move vertically under the drive of the cutting drive mechanism and is used to cooperate with the inner expansion cutting mold mechanism to cut the material off the aggregate. The hopper mechanism is installed at the bottom of the lower mold frame mechanism; A valve plate drive mechanism is mounted in the frame (100); A valve plate mechanism is mounted on a valve plate drive mechanism and cooperates with the bottom of the hopper mechanism.

2. The sorting device for contact lens mold production according to claim 1, characterized in that, The positioning fixture pitch-changing mechanism includes: The divider (101) is fixedly installed in the frame (100); Drive motor 1 (102) has its power output shaft connected to the power input shaft of divider (101); A variable pitch slide plate (103) is installed in the frame (100), and an elliptical variable pitch slide groove (1031) is provided in the variable pitch slide plate (103); A positioning tooling turntable (104) is mounted on the power output shaft of the divider (101); Linear slide rail 1 (105), there are four linear slide rails 1 (105), each linear slide rail 1 (105) is installed on the top of the positioning fixture turntable (104) and arranged at 90-degree intervals along the circumference of the positioning fixture turntable (104). Positioning fixture 1 (106) is slidably mounted on a corresponding linear guide rail 1 (105) via a slider; Positioning fixture 2 (107) is slidably mounted on a corresponding linear guide rail 1 (105) via a slider; Positioning fixture three (108) is slidably mounted on a corresponding linear guide rail one (105) via a slider; Positioning fixture four (109) is slidably mounted on a corresponding linear guide rail one (105) via a slider; The positioning tooling cams (110) are provided in four parts. Each positioning tooling cam (110) is rotatably mounted on the bottom of the corresponding positioning tooling one (106), positioning tooling two (107), positioning tooling three (108), and positioning tooling four (109), and cooperates with the variable pitch slide groove (1031). When the positioning tooling turntable (104) drives positioning tooling one (106), positioning tooling two (107), positioning tooling three (108), and positioning tooling four (109) through the positioning tooling cams (110), When the variable pitch chute (1031) rotates 90 degrees, positioning fixture one (106) and positioning fixture three (108) move to the discharge position to discharge material, and positioning fixture two (107) and positioning fixture four (109) move to the receiving position to receive material. When the positioning fixture turntable (104) rotates 90 degrees again, positioning fixture one (106) and positioning fixture three (108) rotate to the receiving position to receive material, and positioning fixture two (107) and positioning fixture four (109) rotate to the discharge position to discharge material.

3. The sorting device for contact lens mold production according to claim 1, characterized in that, The lower mold frame mechanism includes: The mold support (202) is provided in two sets, and each set of mold support (202) is installed on the top of a corresponding lower mold frame (201) and arranged in the vertical direction; Electric cylinder fixing plates (203) are provided in pairs, and each electric cylinder fixing plate (203) is connected to the top of a corresponding set of mold support columns (202).

4. A sorting device for contact lens mold production according to claim 3, characterized in that, The cutting drive mechanism includes: A pair of cutting electric cylinders (301) are provided, each cutting electric cylinder (301) is installed in a corresponding electric cylinder fixing plate (203) and extends in the vertical direction; Electric cylinder drive servo motors (302) are provided in pairs, and each of the electric cylinder drive servo motors (302) is connected to the power input terminal of the corresponding cutting electric cylinder (301); The lower die expansion drive cylinder (303) is provided in pairs. Each lower die expansion drive cylinder (303) is respectively installed on the upper end face of the cylinder body of the corresponding cutting electric cylinder (301) and extends in the vertical direction. The connecting rod (304) is provided in two pairs, and each pair of connecting rods (304) is connected to the piston head of the corresponding lower mold expansion drive cylinder (303); A pair of pressure plates (305) are provided, each pressure plate (305) being connected to the bottom of two corresponding connecting rods (304) and located above the lower mold frame (201).

5. A sorting device for contact lens mold production according to claim 4, characterized in that, The upper mold frame mechanism includes: The guide pillars (401) are provided in two pairs, each pair of guide pillars (401) is installed in the corresponding lower mold frame (201) and extends in the vertical direction; The upper mold frame (402) is provided in pairs. Each upper mold frame (402) is fixedly connected to the power output shaft of the corresponding cutting electric cylinder (301). Both ends of the upper mold frame (402) are slidably fitted onto the corresponding guide post (401) through guide sleeves. Each upper mold frame (402) is provided with a back-blowing airflow channel (4021), which passes through the upper mold frame (402). Spring 2 (403) is provided in pairs, and each spring 2 (403) is respectively installed in the corresponding upper mold frame (402); The elastic pressure head (404) is provided in pairs. Each elastic pressure head (404) is installed in the corresponding upper mold frame (402) and abuts against the bottom of the corresponding spring (403). The elastic pressure head (404) can move in the vertical direction. The upper cutting blade (405) is provided in two sets. Each set of upper cutting blades (405) is installed in a corresponding upper mold frame (402) and corresponds to the position of the corresponding internal expansion cutting mold (306). Each upper cutting blade (405) is provided with an air outlet (4051) and the air outlet (4051) is connected to the back-blowing airflow channel (4021). Spring 3 (406) is provided in two pairs, with each pair of spring 3 (406) respectively sleeved on a corresponding pair of guide posts (401).

6. A sorting device for contact lens mold production according to claim 1, characterized in that: The silo mechanism includes: Material flow channels (501) are provided in pairs, and each material flow channel (501) is installed at the bottom of the corresponding lower mold frame (201), and its feeding end is connected to the cutting station of the internal expansion cutting mold (306). The hopper (502) is provided in two sets. Each set of hoppers (502) is installed in the frame (100). Each hopper (502) is provided with a through groove (5021). The top of the through groove (5021) is connected to the discharge end of the corresponding material flow channel (501). A pair of hopper cover plates (503) are provided, each hopper cover plate (503) is installed in the frame (100) and located above the corresponding hopper (502); A pair of hopper cover plates (504) are provided, each hopper cover plate (504) is installed in the frame (100) and located above the corresponding hopper (502).

7. A sorting device for contact lens mold production according to claim 6, characterized in that: The valve plate drive mechanism includes: Servo motor 1 (601) is fixedly mounted on the frame (100) and arranged in the transverse direction; A transmission belt structure (602) is mounted on a frame (100) and connected to the power output shaft of a servo motor (601); A drive shaft (603) is rotatably mounted in a frame (100), and one end is connected to a drive belt structure (602); Synchronous pulley 1 (604), a pair of synchronous pulley 1 (604) are provided, and each synchronous pulley 1 (604) is respectively installed at both ends of the transmission shaft 1 (603); Drive shaft 2 (605) is rotatably mounted in frame (100); Synchronous pulley two (606) is provided in pairs, and each of the synchronous pulley two (606) is respectively installed at both ends of the transmission shaft two (605) and corresponds to the position of synchronous pulley one (604); Synchronous belt 1 (607) is provided in pairs, with one end of each synchronous belt 1 (607) sleeved on the corresponding synchronous pulley 1 (604) and the other end sleeved on the corresponding synchronous pulley 2 (606); Linear slide rail 2 (608) is provided in pairs, and each linear slide rail 2 (608) is respectively installed on the frame (100); The valve plate mechanism includes: The first split valve plate (701) is fixedly installed at both ends on the upper belts of the two synchronous belts (607), located at the bottom of the hopper (502), and slides in cooperation with the corresponding linear slide rail (608) through a slider. The two ends of the second valve plate (702) are fixedly installed on the lower belts of the two synchronous belts (607), respectively. It is located at the bottom of the hopper (502) and slides with the corresponding linear slide rail (608) through a slider.

8. A sorting device for contact lens mold production according to claim 1, characterized in that, The material handling robot mechanism includes: Linear motion module 1 (801) is fixedly mounted on the frame (100); Linear motion module 2 (802) is fixedly mounted on the frame (100); The module parallel link (803) is connected at one end to the power input shaft of linear motion module one (801) and at the other end to the power input shaft of linear motion module two (802). A transverse drive servo motor (804) is mounted on the linear motion module one (801), and its power output shaft is connected to the power input shaft of the linear motion module one (801). The crossbeam (805) of the material handling robot is fixedly connected at both ends to the moving ends of linear motion module one (801) and linear motion module two (802), respectively. Upper and lower cylinders (806) are provided in pairs, and each upper and lower cylinder (806) is installed on the crossbeam (805) of the material handling robot and corresponds to the position of the internal expansion cutting mold (306); A suction cup holder (807) is provided in pairs, and each suction cup holder (807) is respectively installed at the piston rod end of the corresponding upper and lower cylinders (806); The vacuum suction cup (808) is provided in two sets, and each set of vacuum suction cups (808) is installed in the corresponding suction cup holder (807).

9. A method of using a sorting device for contact lens mold production, comprising operating the sorting device for contact lens mold production as described in any one of claims 1 to 8, characterized in that, Includes the following steps: A1: Place the two pieces to be cut into the positioning fixture pitch-changing mechanism. The positioning fixture pitch-changing mechanism drives the two pieces to be cut to rotate 90 degrees and widens the distance between the two pieces to be cut, so that their positions are adapted to the material handling robot mechanism. A2: The pick-and-place robot moves to above the workpiece to be cut, adsorbs the workpiece, and moves the workpiece to above the internal expansion cutting mold mechanism. Then, it releases the workpiece and places it into the internal expansion cutting mold mechanism. The pick-and-place robot then resets. A3: The cutting drive mechanism starts, driving the internal expansion cutting mold mechanism to move down. During the downward movement, the middle of the internal expansion cutting mold (306) expands and fastens the workpiece to be cut. Then the upper mold frame mechanism moves down and cooperates with the internal expansion cutting mold mechanism to cut the material off the aggregate. High pressure air is blown out from the back-blowing airflow channel (4021) in the upper mold frame mechanism to blow the material into the hopper mechanism. A4: The upper mold frame mechanism and the inner expansion cutting mold are reset. The material handling robot moves toward the inner expansion cutting mold mechanism to remove the remaining aggregate in the inner expansion cutting mold mechanism and transfer it to the injection runner aggregate conveying mechanism. The injection runner aggregate conveying mechanism then sends the aggregate out of the frame (100). A5: The materials that fall off during cutting are moved to the silo mechanism and stored separately; A6: When discharging material, the valve plate drive mechanism moves the valve plate mechanism away from each other, causing the valve plate mechanism to release the seal on the bottom of the hopper mechanism. The bottom of the hopper mechanism opens, discharging the material from the hopper (502) and dropping it into the AGV trolley. Subsequently, the valve plate drive mechanism moves the valve plate mechanism closer to each other, closing the bottom of the hopper mechanism, and the device prepares for the next round of operation.

Images