A pipette tip injection molding device with finished product inspection function

Abstract

The present invention discloses a pipette tip injection molding device with a finished product inspection function, comprising an injection molding mechanism and a blanking mechanism, wherein the injection molding mechanism comprises a multi-stage cylinder connected to an upper mold, the upper mold comprises a first movable block and a second movable block, the bottom of the first movable block is provided with a core passing through the second movable block, the side of the second movable block is provided with an elastic limiter, and the side of the first gantry is provided with a limit opening; the blanking mechanism comprises a moving mechanism and a blanking conveyor line, the blanking conveyor line comprises a synchronous belt, the synchronous belt is provided with a pipette tip positioning assembly, a first spring is connected between the bottom of the guide sleeve and the positioning pin, a support plate with a guide ramp on the side is provided in the bracket, the support plate is provided with an openable and closable opening, a plurality of industrial cameras are provided above the blanking conveyor line, and a blowing device and a defective product discharge channel are provided on both sides of the blanking conveyor line. Each pipette tip after injection molding can be accurately positioned and inspected, with high inspection efficiency and saved inspection time.

Description

Technical Field

[0001] The invention belongs to the technical field of pipette tip injection molding devices, in particular to a pipette tip injection molding device with a finished product inspection function. Background Art

[0002] Pipette tips are essential components for liquid washers. Commonly made of polypropylene and polyethylene, they are typically injection molded, requiring a smooth inner surface and precise dimensions.

[0003] Pipette tips processed by injection molding may have the following defects:

[0004] 1. Dimensional deviation: The inner or outer diameter does not meet standard specifications. For example, an inner diameter that is too small may result in a loose connection between the pipette and the tip, affecting the seal; an outer diameter that is too large may prevent the pipette from fitting properly. Length deviation may also occur, affecting the depth of the pipette tip insertion and, in turn, affecting pipetting accuracy.

[0005] 2. Shape Defects: The tip of the pipette tip may be bent or uneven. A bent tip can cause inaccurate positioning when aspirating small volumes of liquid, while an uneven tip can result in residual liquid or inaccurate aspiration. Concave or convex parts of the pipette tip's barrel can affect its fit with the pipette and the flow characteristics of the liquid within the tip.

[0006] 3. Surface quality issues: The surface may be uneven and rough. A rough inner surface increases friction between the liquid and the pipette tip, potentially causing liquid to stick to the wall, thus affecting pipetting accuracy and repeatability. The presence of impurities: During processing, impurities such as plastic debris may enter the pipette tip, which not only contaminates the sample but may also clog the tip, affecting proper aspiration and discharge of liquid.

[0007] Therefore, before the injection-molded pipette tips are boxed and packaged, they need to be inspected as finished products. Existing inspection methods generally only rely on manual screening or random sampling, which results in some unqualified pipette tips being shipped, making it difficult to guarantee product quality. Moreover, even random inspections take a lot of time. Summary of the Invention

[0008] In response to the shortcomings of the existing technology, the present invention provides a pipette tip injection molding device with a finished product inspection function. This pipette tip injection molding device can accurately locate and inspect each pipette tip after injection molding, effectively avoiding the shipment of unqualified pipette tips, and has high inspection efficiency, saving inspection time.

[0009] In order to solve the above technical problems, the present invention is solved through the following technical solutions: a pipette tip injection molding device with a finished product inspection function, comprising an injection molding mechanism and a blanking mechanism, the injection molding mechanism comprising a first gantry, a lower mold fixed to the bottom of the first gantry, an upper mold vertically slidably arranged in the first gantry, a multi-stage cylinder for driving the upper mold to rise and fall is arranged on the top of the first gantry, the upper mold comprising a first movable block and a second movable block, a core movable through the second movable block is arranged at the bottom of the first movable block, the core cooperates with the cavity on the lower mold to form a mold cavity, an elastic limiter is arranged on the side of the second movable block, and a limited opening is arranged on the side of the first gantry; the blanking mechanism comprises a moving mechanism and a blanking conveyor line, the moving mechanism comprises a linear slide rail, a slide is arranged on the linear slide rail, a moving platform with a transfer hole is arranged on the slide, and an elastic sealing component is arranged at the bottom of the transfer hole. The top of described sliding panel also is provided with an interlocking structure, and the interlocking structure is, for sliding the sliding panel also is, arranged on the interlocking structure to interlock the plurality of sliding panels, the plurality of sliding panels have internal threads connected to each other and are arranged on the interlocking structure to interlock the plurality of sliding panels.When using this pipette tip injection molding device with finished product inspection function, a non-stick coating is first applied to the inner wall of the mold cavity, and then the multi-stage cylinder is fully extended, the upper mold and the lower mold are closed, and then injection molding is performed. After the tip is cooled and formed, the multi-stage cylinder retracts one level, and the core drives the tip to rise together. At this time, the elastic limit piece just slides into the limit buckle, and the first movable block and the second movable block are not separated; then the linear slide drives the material transfer platform to slide under the upper mold, and the transfer holes on the material transfer platform are aligned one by one with the core, and then the multi-stage cylinder retracts one level again. Due to the limitation of the limit mouth, the first movable block and the second movable block are separated at this time, and the second movable block moves downward relative to the first movable block to push the tip on the core down and drop it into the transfer hole, and then the linear slide drives the material transfer platform to slide above the unloading conveyor line. After the material transfer platform is moved away, the multi-stage cylinder extends and closes. The mold is moved to the next round of injection molding operation. When the material transfer table moves to the top of the unloading conveyor line, the elastic sealing component is pushed by the top plate to open the transfer hole, and the transfer hole is aligned with the positioning pins on the synchronous belt one by one. The suction head in the transfer hole falls and is put on the positioning pin to stand upright. Then the synchronous belt rotates to drive the suction head to pass through the shooting positions of several industrial cameras one by one. After the industrial camera shoots and compares, if the suction head is defective, the driving device drives the movable plate to move to open the opening and then reset. After the opening is opened, the positioning pin retracts downward, and the defective suction head set on it is blown to the defective product discharge channel by the blowing device. If the suction head has no defects, it continues to be driven by the synchronous belt to be transported to the discharge end. When it reaches the discharge end, the positioning pin loses the support of the support plate and moves downward under the elastic force of the first spring, so that the suction head can be discharged from the output end of the unloading conveyor line. Since this pipette tip injection molding device can be vertically positioned on the synchronous belt, the industrial camera can accurately compare it. In addition, the industrial cameras can be used to capture and compare the dimensions of multiple angles at multiple angles. Each pipette tip that has been injected can be accurately positioned and inspected, effectively preventing the shipment of unqualified pipette tips. The inspection efficiency is high and inspection time is saved.

[0010] In the above technical solution, preferably, the synchronous pulley is a roller with an annular notch in the middle to avoid the suction head positioning assembly. This structure makes the synchronous pulley drive the synchronous belt to move more stably and can avoid the suction head positioning assembly.

[0011] In the above technical solution, preferably, the support plate is provided with a guide groove that abuts against the bottom of the positioning pin, and part of the guide groove is located on the movable plate. This structure allows the positioning pin to be stably and accurately aligned under the guidance of the guide groove, so that the positioning pin can accurately align with the center hole of the suction head dropped into the transfer hole.

[0012] In the above technical solution, preferably, support platforms are provided on both sides of the first gantry, the unloading conveyor line is located below the two support platforms, and a plurality of industrial cameras are provided at the bottom of the support platform near the discharge side of the unloading conveyor line. The support platforms are respectively provided with the linear slides in parallel, and the slides are provided on the two linear slides. A fixed rod is connected between the two slides, and the material transfer platform is fixed on the fixed rod. This structure makes the sliding of the material transfer platform more stable and accurate.

[0013] In the above technical solution, preferably, an adjustment bolt is vertically rotatably provided on the bracket, the adjustment bolt being threadedly connected to the support plate, and the top of the positioning pin is tapered. The tapered top of the positioning pin facilitates insertion of the suction head, and the height of the support plate can be adjusted by rotating the adjustment bolt, thereby adjusting the length of the positioning pin tip extending from the guide sleeve, and changing the outer diameter of the positioning pin where it is flush with the guide sleeve to accommodate the positioning of suction heads of various apertures.

[0014] In the above technical solution, preferably, the unloading mechanism further includes a second gantry, on which a lifting cylinder is provided, the output end of which is connected to a lifting frame, and the lifting frame is provided with a push rod that is aligned one-to-one with the transfer holes of the transfer platform when the unloading conveyor line is above the unloading conveyor line. With this structure, after the top plate pushes the elastic sealing assembly to open the transfer hole, the lifting cylinder can push the lifting frame downward, so that the suction head in the transfer hole can be correctly pushed onto and inserted into the positioning pin below it, avoiding the suction head remaining in the transfer hole.

[0015] In the above technical solution, preferably, a stopper is provided at the bottom of the core, and a receiving groove matching the stopper is provided at the bottom of the cavity, wherein the outer diameter of the stopper is larger than the inner diameter of the bottom of the cavity. With this structure, during injection molding, the stopper is located within the receiving groove and does not affect the injection molding. When the upper mold rises, the stopper can provide a certain limit to the bottom of the injection-molded suction head, preventing the suction head from being unable to rise correctly with the core. When the first movable block and the second movable block separate, the suction head itself has a certain degree of flexibility, which does not affect the blanking and size of the suction head. Of course, the outer diameter of the stopper should not be too large.

[0016] In the above technical solution, preferably, the elastic limiter includes a guide cylinder fixed to the side of the second movable block, a limit block movably disposed within the guide cylinder, and a second spring located within the guide cylinder connecting the bottom of the guide cylinder and the limit block. A guide slope is provided below the limit opening on the side of the first gantry, and the lower end surface of the outer end of the limit block mates with the guide slope. With this structure, when the multi-stage cylinder moves downward, the limit block can automatically retract into the guide cylinder under the guidance of the guide slope, making the multi-stage cylinder extend and retract more smoothly.

[0017] In the above technical solution, preferably, the elastic blocking assembly includes a sliding block movably arranged at the bottom of the material transfer platform, a guide rod passing through the sliding block and laterally fixed to the material transfer platform, a third spring is provided between the sliding block and the material transfer platform, and a blanking hole is provided on the sliding block that matches the transfer hole. When the material transfer platform moves above the unloading conveyor line, the top plate pushes against the sliding block and slides so that the blanking hole is aligned with the transfer hole. This elastic blocking assembly can conveniently cooperate with the top plate to open the transfer hole, has a simple structure, and is low in cost.

[0018] In the above technical solution, preferably, the movable plate is hinged to a support plate on the side of the opening, a support arm is fixed to the bottom of the support plate, and the driving device is a control cylinder with its ends hinged to the support arm and the bottom of the movable plate, respectively. This structure allows the opening or closing of the opening to be conveniently controlled by the extension and contraction of the control cylinder, thereby conveniently controlling whether the positioning pin falls.

[0019] Compared with the prior art, the present invention has the following beneficial effects: when using this pipette tip injection molding device with a finished product inspection function, a non-stick coating is first applied to the inner wall of the cavity, and then the multi-stage cylinder is fully extended, the upper mold and the lower mold are closed, and then injection molding is performed. After the tip is cooled and formed, the multi-stage cylinder retracts one level, and the core drives the tip to rise together. At this time, the elastic limit piece just slides into the limit buckle, and the first movable block and the second movable block are not separated; then the linear slide drives the material transfer platform to slide under the upper mold, and the transfer hole on the material transfer platform is aligned one by one with the core, and then the multi-stage cylinder retracts one level again. Due to the limitation of the limit mouth, the first movable block and the second movable block are separated at this time, and the second movable block moves downward relative to the first movable block to push the tip on the core down and drop it into the transfer hole, and then the linear slide drives the material transfer platform to slide above the unloading conveyor line, and the material transfer platform is moved away. Afterwards, the multi-stage cylinder extends out to close the mold and continue with the next round of injection molding operation. When the material transfer table moves to the top of the unloading conveyor line, the top plate pushes the elastic sealing component to open the transfer hole, and the transfer hole is aligned with the positioning pins on the synchronous belt one by one. The suction head in the transfer hole falls and is put on the positioning pin to stand upright. Then the synchronous belt rotates to drive the suction head to pass through the shooting positions of several industrial cameras one by one. After the industrial camera shoots and compares, if the suction head is defective, the driving device drives the movable plate to move to open the opening and then reset it. After the opening is opened, the positioning pin retracts downward, and the defective suction head mounted on it is blown to the defective product discharge channel by the blowing device. If the suction head has no defects, it continues to be driven by the synchronous belt to be transported to the discharge end. When it reaches the discharge end, the positioning pin loses the support of the support plate and moves downward under the elastic force of the first spring, so that the suction head can be discharged from the output end of the unloading conveyor line. Since this pipette tip injection molding device can be vertically positioned on the synchronous belt, the industrial camera can accurately compare it. In addition, the industrial cameras can be used to capture and compare the dimensions of multiple angles at multiple angles. Each pipette tip that has been injected can be accurately positioned and inspected, effectively preventing the shipment of unqualified pipette tips. The inspection efficiency is high and inspection time is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the overall structure of an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the local structure of an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the cross-sectional structure of the injection molding mechanism during mold closing in an embodiment of the present invention.

[0023] Figure 4 for Figure 3 A partial enlarged view of .

[0024] Figure 5Schematic diagram of the cross-sectional structure of the injection molding mechanism during mold opening in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the exploded structure of the unloading conveyor line in an embodiment of the present invention.

[0026] Figure 7 for Figure 6 A partial enlarged view of .

[0027] Figure 8 This is a schematic diagram of the partial cross-section structure when positioning the suction head of the blanking conveyor line in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of the partial cross-sectional structure of the blanking conveyor line when the suction head is released from positioning in an embodiment of the present invention.

[0029] Figure 10 Schematic diagram of the cross-sectional structure of the material transfer platform in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figures 1 to 10, a pipette tip injection molding device with a finished product inspection function, including an injection molding mechanism and a blanking mechanism, the injection molding mechanism includes a first gantry 1, a lower mold 2 is fixed at the bottom of the first gantry 1, an upper mold 3 is vertically slidably arranged in the first gantry 1, a multi-stage cylinder 4 is arranged on the top of the first gantry 1 to drive the upper mold 3 to rise and fall, the upper mold 3 includes a first movable block 5 and a second movable block 6, a core 7 that can move through the second movable block 6 is arranged at the bottom of the first movable block 5, the core 7 cooperates with the cavity on the lower mold 2 to form a mold cavity, and an elastic A limiter 8 is provided, and a limit opening 9 is provided on the side of the first gantry 1; the unloading mechanism includes a moving mechanism and an unloading conveyor line, the moving mechanism includes a linear slide 10, a slide 11 is provided on the linear slide 10, a moving platform 13 with a transfer hole 12 is provided on the slide 11, and an elastic blocking component 14 is provided at the bottom of the transfer hole 12. The moving platform 13 moves between the bottom of the upper mold 3 and the top of the unloading conveyor line, and a top plate 15 for hitting the elastic blocking component 14 to open the bottom of the transfer hole 12 is provided near the unloading conveyor line; the unloading conveyor line includes a bracket 16, which is located on the bracket 16 The synchronous pulleys 17 at both ends and the synchronous belt 18 wound around the synchronous pulleys 17, one of the synchronous pulleys 17 is connected to a servo drive motor, which can drive the synchronous pulley 17 to rotate intermittently at a specific angle. A suction head positioning assembly 19 is provided on the synchronous belt 18, and the suction head positioning assembly 19 includes a guide sleeve 20 and a positioning pin 21 inserted into the guide sleeve 20. The guide sleeve 20 includes two parts, which are clamped and fixed to the synchronous belt 18 from both sides by a threaded connection. A first spring 22 is connected between the bottom of the guide sleeve 20 and the positioning pin 21. A support plate 23 is provided in the bracket 16, which is against the bottom of the positioning needle 21. A guide inclined plate 24 is provided on the support plate 23 at the entry side of the positioning needle 21. An opening 25 is provided on the support plate 23. A movable plate 26 driven by a driving device is provided in the opening 25. Several industrial cameras 27 aimed at the suction head above the opening 25 are provided above the unloading conveyor line. A blowing device 28 and a defective product discharge channel 29 are respectively provided on both sides of the opening 25 of the unloading conveyor line. The blowing device 28 is an air pump connected to the blowing port, and the blowing direction of the blowing port is aligned with the defective product discharge channel 29.After the injection molding machine is in operation, the first movable block 5 and the second movable block 6 are separated, and the second movable block 6 moves downward relative to the first movable block 5 to push the suction head on the core 7 down and fall into the transfer hole 12. After that, the linear slide 10 drives the material transfer platform 13 to slide above the unloading conveyor line. After the material transfer platform 13 is moved away, the multi-stage cylinder 4 extends and closes the mold, and continues to be molded. The next round of injection molding operation is carried out. When the material transfer platform 13 moves to the top of the unloading conveyor line, the elastic sealing component 14 is pushed by the top plate 15 to open the transfer hole 12, and the transfer hole 12 is aligned one by one with the positioning pin 21 on the synchronous belt 18. The suction head in the transfer hole 12 falls and is put on the positioning pin 21 to stand upright. Then, the synchronous belt 18 rotates and drives the suction head to pass through the shooting positions of several industrial cameras 27 one by one. After the industrial camera 27 shoots and compares, if the suction head is defective, the driving device drives the movable plate 26 to move to open the opening 25 and then reset. After opening the opening 25, the positioning pin 21 retracts downward, and the defective suction head put on it is blown to the defective product discharge channel 29 by the blowing device 28. If the suction head is not defective, it continues to be driven by the synchronous belt 18 to be transported to the discharge end. When reaching the discharge end, the positioning pin 21 moves downward under the elastic force of the first spring 22 due to the loss of support of the support plate 23, so that the suction head can be discharged from the output end of the unloading conveyor line. Since this pipette tip injection molding device can be vertically positioned on the synchronous belt 18, the industrial camera 27 can be accurately compared, and the industrial cameras 27 can shoot and compare the dimensions of multiple angles at multiple angles. Each pipette tip that has been injected can be accurately positioned and inspected, effectively avoiding the shipment of unqualified pipette tips, and the inspection efficiency is high, saving inspection time.

[0031] The image processing steps of the industrial camera 27 may be as follows: S1: pre-collecting defect-free finished product tips and positioning them on the positioning pin 21, capturing their images and collecting and storing the images; S2: setting a similarity threshold; S3: comparing the collected images with the images of defect-free tips for similarity. If the similarity is greater than the threshold, it is a defect-free finished product; if it is less than the threshold, it is a defective defective product.

[0032] If the defective products are detected, the driving device drives the movable plate 26 to move to open the opening 25 and then reset it. The blowing device 28 blows air, and the air flow blown by the blowing device 28 blows the defective products into the defective product discharge channel 29 for sorting, thereby realizing the automatic inspection and sorting functions.

[0033] In this embodiment, the synchronous pulley 17 is roller-shaped with an annular notch in the middle to allow for clearance of the suction head positioning assembly 19. This structure ensures more stable movement of the synchronous belt 18 driven by the synchronous pulley 17 and allows clearance of the suction head positioning assembly 19. For simplicity, the synchronous teeth on the synchronous pulley 17 and synchronous belt 18 in Figure 6 are omitted, but they should be present for accurate transmission.

[0034] In this embodiment, the support plate 23 is provided with a guide groove 30 that abuts against the bottom of the positioning pins 21. Part of the guide groove 30 is located on the movable plate 26. This structure allows the positioning pins 21 to be stably and accurately aligned under the guidance of the guide groove 30, preventing the positioning pins 21 from deflecting left and right and losing accurate alignment with the center hole of the suction head. Even if there is a small amount of deflection in the front-to-back direction, the deflection direction of the positioning pins 21 remains consistent, and the distance between the needle tips of adjacent positioning pins 21 remains unchanged. By adjusting the stop position of the synchronous pulley 17, the needle tips of the positioning pins 21 can be ensured to accurately align with the center hole of the suction head dropped into the transfer hole 12.

[0035] In this embodiment, support platforms 31 are provided on both sides of the first gantry 1. The support platforms 31 are supported by support rods. The unloading conveyor line is located below the two support platforms 31. Several industrial cameras 27 are provided at the bottom of the support platform 31 near the discharge side of the unloading conveyor line. Linear slides 10 are provided in parallel on the support platforms 31. Slides 11 are provided on both linear slides 10. A fixed rod 32 is connected between the two slides 11. The fixed rod 32 is fixed to the material transfer platform 13. This structure makes the sliding of the material transfer platform 13 more stable and accurate.

[0036] In this embodiment, an adjustment bolt 33 is vertically rotatably mounted on the bracket 16 and threadedly connected to the support plate 23. The top of the positioning pin 21 is tapered. This tapered top shape not only facilitates insertion of the suction tip, but also allows the height of the support plate 23 to be adjusted by rotating the adjustment bolt 33, thereby adjusting the length of the tip of the positioning pin 21 extending from the guide sleeve 20. This allows the outer diameter of the positioning pin 21 at the point where it is flush with the guide sleeve 20 to accommodate suction tips of varying apertures.

[0037] In this embodiment, the unloading mechanism also includes a second gantry 34, the two columns of which are fixed to the support platform 31. The second gantry 34 is provided with a vertically retractable ejection cylinder 35, the output end of which is connected to an ejection rack 36, and the ejection rack 36 is provided with an ejector rod 37 that is aligned one-to-one with the transfer hole 12 of the transfer platform 13 when the transfer platform is above the unloading conveyor line. With this structure, after the top plate 15 pushes the elastic sealing component 14 to open the transfer hole 12, the ejection rack 36 can be pushed downward by the ejection cylinder 35, so that the suction head in the transfer hole 12 can be correctly pushed to and sleeved on the positioning pin 21 below it, avoiding the suction head remaining in the transfer hole 12.

[0038] In this embodiment, a stopper 38 is provided at the bottom of the core 7, and a receiving groove 39 matching the stopper 38 is provided at the bottom of the cavity. The outer diameter of the stopper 38 is larger than the inner diameter of the bottom of the cavity. With this structure, during injection molding, the stopper 38 is located in the receiving groove 39 and does not affect the injection molding. When the upper mold rises, the stopper 38 can have a certain limiting effect on the bottom of the injection-molded suction head, preventing the suction head from not being able to rise correctly with the core 7. When the first movable block 5 and the second movable block 6 are separated, the suction head itself has a certain degree of flexibility and does not affect the blanking and size of the suction head. Of course, the outer diameter of the stopper 38 should not be too large, and it can provide sufficient support or friction to drive the suction head to rise. When the suction head is pushed downward, the suction head itself can deform and smoothly pass over the stopper 38.

[0039] In this embodiment, the elastic stopper 8 includes a guide cylinder 40 fixed to the side of the second movable block 6, a stopper 41 movably disposed within the guide cylinder 40, and a second spring 42 located within the guide cylinder 40, connecting the bottom of the guide cylinder 40 and the stopper 41. A guide slope 43 is provided below the stop opening 9 on the side of the first gantry 1, and the lower end surface of the stopper 41 mates with the guide slope 43. This structure allows the stopper 41 to automatically retract into the guide cylinder 40 under the guidance of the guide slope 43 when the multi-stage cylinder 4 moves downward, making the multi-stage cylinder 4 extend and retract more smoothly.

[0040] In this embodiment, the elastic sealing assembly 14 includes a sliding block 44 movably mounted at the bottom of the material transfer platform 13, a guide rod 45 extending through the sliding block 44 and laterally fixed to the material transfer platform 13, a third spring 46 interposed between the sliding block 44 and the material transfer platform 13, and a blanking hole 47 formed on the sliding block 44 that aligns with the transfer hole 12. When the material transfer platform 13 moves above the material discharge conveyor line, the top plate 15 pushes against the sliding block 44 and slides to align the blanking hole 47 with the transfer hole 12. This elastic sealing assembly 14 can conveniently cooperate with the top plate 15 to open the transfer hole 12, has a simple structure, and is inexpensive to manufacture.

[0041] In this embodiment, the movable plate 26 is hingedly connected to the support plate 23 on the side of the opening 25. A support arm 48 is fixed to the bottom of the support plate 23. The driving device is a control cylinder 49 with its ends hinged to the support arm 48 and the bottom of the movable plate 26. This structure allows the opening and closing of the opening 25 to be conveniently controlled by the extension and retraction of the control cylinder 49, thereby conveniently controlling whether the positioning pin 21 is dropped. Of course, in other embodiments, the movable plate 26 can also open the opening 25 by sliding or lifting.

[0042] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pipette tip injection molding device with a finished product inspection function, comprising an injection molding mechanism and a blanking mechanism, characterized in that: The injection molding mechanism comprises a first gantry (1), a lower mold (2) is fixed at the bottom of the first gantry (1), an upper mold (3) is vertically slidably arranged in the first gantry (1), a multi-stage cylinder (4) is arranged on the top of the first gantry (1) for driving the upper mold (3) to move up and down, the upper mold (3) comprises a first movable block (5) and a second movable block (6), a core (7) is arranged at the bottom of the first movable block (5) and is movable and passes through the second movable block (6), the core (7) cooperates with the mold cavity on the lower mold (2) to form a mold cavity, and the second movable block (6) An elastic limiting member (8) is provided on the side, and a limiting opening (9) is provided on the side of the first gantry (1); the unloading mechanism includes a material moving mechanism and an unloading conveying line, the material moving mechanism includes a linear slide rail (10), a slide table (11) is provided on the linear slide rail (10), a material moving platform (13) with a transfer hole (12) is provided on the slide table (11), an elastic blocking component (14) is provided at the bottom of the transfer hole (12), the material moving platform (13) moves between the bottom of the upper mold (3) and the top of the unloading conveying line, and a collision device for impacting the material moving platform (13) is provided near the unloading conveying line. The elastic sealing component (14) opens the top plate (15) at the bottom of the transfer hole (12); the unloading conveying line includes a bracket (16), a synchronous pulley (17) located at both ends of the bracket (16) and a synchronous belt (18) wound around the synchronous pulley (17), a suction head positioning component (19) is provided on the synchronous belt (18), and the suction head positioning component (19) includes a guide sleeve (20) and a positioning needle (21) inserted into the guide sleeve (20), a first spring (22) is connected between the bottom of the guide sleeve (20) and the positioning needle (21), and the bracket A support plate (23) is provided in (16) and is against the bottom of the positioning needle (21); a guide inclined plate (24) is provided on the support plate (23) at the entry side of the positioning needle (21); an opening (25) is provided on the support plate (23); a movable plate (26) driven by a driving device is provided in the opening (25); a plurality of industrial cameras (27) are provided above the unloading conveyor line and are aimed at the suction head above the opening (25); and a blowing device (28) and a defective product discharge channel (29) are provided on both sides of the opening (25) of the unloading conveyor line.

2. A pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: The synchronous pulley (17) is in the shape of a roller and has an annular notch in the middle for avoiding the suction head positioning assembly (19).

3. A pipette tip injection molding device with a finished product inspection function according to claim 1 or 2, characterized in that: The support plate (23) is provided with a guide groove (30) that abuts against the bottom of the positioning pin (21), and part of the guide groove (30) is located on the movable plate (26).

4. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: Support platforms (31) are provided on both sides of the first gantry (1), the unloading conveyor line is located below the two support platforms (31), and a plurality of industrial cameras (27) are provided at the bottom of the support platform (31) near the discharge side of the unloading conveyor line. The linear slide rails (10) are respectively provided in parallel on the support platform (31), and the slides (11) are provided on the two linear slide rails (10). A fixing rod (32) is connected between the two slides (11), and the material transfer platform (13) is fixed on the fixing rod (32).

5. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: An adjusting bolt (33) is vertically rotatably provided on the bracket (16), the adjusting bolt (33) is threadedly connected to the support plate (23), and the top of the positioning pin (21) is conical.

6. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: The unloading mechanism further comprises a second gantry (34), a material ejecting cylinder (35) is provided on the second gantry (34), an output end of the material ejecting cylinder (35) is connected to a material ejecting frame (36), and a material ejecting frame (36) is provided with a ejector rod (37) aligned one-to-one with the transfer hole (12) of the material transfer platform (13) when the material transfer platform (13) is above the unloading conveyor line.

7. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: A stopper (38) is provided at the bottom of the core (7), and a receiving groove (39) matching the stopper (38) is provided at the bottom of the cavity. The outer diameter of the stopper (38) is greater than the inner diameter of the bottom of the cavity.

8. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: The elastic limiting member (8) includes a guide cylinder (40) fixed to the side of the second movable block (6), a limiting block (41) movably arranged in the guide cylinder (40), and a second spring (42) located in the guide cylinder (40) and connecting the bottom of the guide cylinder (40) and the limiting block (41). A guiding inclined surface (43) is provided below the limiting opening (9) on the side of the first gantry (1), and the lower side of the outer end surface of the limiting block (41) matches the guiding inclined surface (43).

9. The pipette tip injection molding device with a finished product inspection function according to claim 1, characterized in that: The elastic sealing assembly (14) includes a sliding block (44) movably arranged at the bottom of the material transfer platform (13), a guide rod (45) passing through the sliding block (44) and laterally fixed to the material transfer platform (13), a third spring (46) is provided between the sliding block (44) and the material transfer platform (13), and a blanking hole (47) matching the transfer hole (12) is provided on the sliding block (44). When the material transfer platform (13) moves to above the material discharge conveyor line, the top plate (15) presses against the sliding block (44) to slide so that the blanking hole (47) is aligned with the transfer hole (12).

10. The pipette tip injection molding device with finished product inspection function according to claim 1, characterized in that: The movable plate (26) is hinged to the support plate (23) on the side of the opening (25), and a support arm (48) is fixed to the bottom of the support plate (23). The driving device is a control cylinder (49) with two ends hinged to the support arm (48) and the bottom of the movable plate (26).

Images