A molding die for a pipette tip

Abstract

The present application relates to pipette tip preparation technical field, specifically disclose a kind of forming mould of pipette tip, including lower mould and upper mould, the upper part of lower mould is equipped with upper mould, the top of upper mould is opened with filling groove, the top of upper mould is equipped with filling port above filling groove, the top of upper mould is equipped with first auxiliary mechanism, upper mould is equipped with fourth slot on the side wall of filling groove.This application is provided with movable block, second extension plate and first lifting plate, after filling plastic melt in lower mould and upper mould, plastic melt in lower mould and upper mould can be extruded, combined with the measurement of pressure sensor to pressure value, the pressure of plastic melt can be increased, so that plastic melt can fully fill each corner and detail part of mould, reduce the defect caused by filling shortage.Excess plastic residue generated during injection molding process can be collected, so that excess waste plastic can be recycled.

Description

Technical Field

[0001] This invention relates to the field of pipette tip manufacturing technology, and more particularly to a molding die for a pipette tip. Background Technology

[0002] Pipette tips are typically molded using injection molds. Injection molds are tools used to produce plastic products; they also give plastic products their complete structure and precise dimensions. Injection molding is a processing method used in the mass production of parts, primarily in industrial applications. The injection molding process involves injecting molten material under high pressure into the mold cavity, where it cools and solidifies to obtain the molded product. Based on molding characteristics, molds are classified into two types: thermosetting plastic molds and thermoplastic plastic molds.

[0003] Currently, when using injection molds, the injection molding machine adds a preset amount of molten plastic into the mold. After the plastic solution cools and solidifies, the injection molded product is produced. However, during the production of injection molded products, after the molten plastic is added into the mold, the injection head is currently used to pressurize the mold. However, the injection head pressurizes the injection solution in the mold by continuously adding the injection solution. This pressurization method cannot achieve precise control of the injection pressure, and it is easy to have excessive or insufficient pressure. Insufficient pressure will cause the molten plastic to be insufficiently distributed in the mold, while excessive pressure will cause the mold to deform, resulting in deviations in the size of the produced pipette tips, which will not meet the design requirements. Uneven distribution of the molten plastic will cause production defects in the injection molded products, affecting the production quality of the pipette tips. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a molding die for pipette tips.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A molding die for a pipette tip includes a lower die and an upper die. The upper die is located above the lower die. A filling groove is formed through the top of the upper die. A filling port is installed above the filling groove on the top of the upper die. A first auxiliary mechanism is provided on the top of the upper die. A fourth slot is formed on the side wall of the filling groove on the upper die. A movable block is movably installed inside the fourth slot. A second auxiliary mechanism is provided on the movable block. A first lifting plate is movably installed at the top of the interior of the lower die.

[0006] Preferably, the first auxiliary mechanism includes an electric lifting rod, a fixed rod, and a fixed plate. The electric lifting rod is movably installed on the top of the upper mold, with the lifting end of the electric lifting rod facing upward. A fixed rod is installed on the lifting end of the electric lifting rod. A first electric telescopic rod is installed at the bottom of the fixed rod away from the electric lifting rod, with the telescopic end of the first electric telescopic rod facing downward. A fixed plate is installed on the telescopic end of the first electric telescopic rod. Two movable plates are movably installed at the bottom of the fixed plate.

[0007] Preferably, a first rotary motor is embedded in the top of the upper mold, with the output end of the first rotary motor facing upwards and connected to the mounting end of the electric lifting rod.

[0008] Preferably, the bottom ends of the fixed plate are provided with first slots, and the inner walls of the two first slots are provided with second electric telescopic rods. The telescopic ends of the two second electric telescopic rods are far apart from each other, and the telescopic ends of the second electric telescopic rods are provided with positioning blocks. The bottom of the positioning blocks is connected to the top of the movable plate.

[0009] Preferably, both sides of the fourth slot are horizontally provided with sliding grooves, and an electric slider is installed on the side of the movable block near the sliding groove, and the electric slider is slidably installed inside the sliding groove.

[0010] Preferably, the second auxiliary mechanism includes a second extension plate, which is movably mounted on the bottom of the movable block.

[0011] Preferably, the bottom of the movable block is provided with a plurality of fifth slots, a fixed block is movably installed inside the fifth slot, a connecting block is movably installed at the end of the fixed block away from the movable block, and the end of the connecting block near the second extension plate is connected to the second extension plate.

[0012] Preferably, a fourth electric telescopic rod is installed at the top of the inner wall of the fifth slot, the telescopic end of the fourth electric telescopic rod faces the fixed block, and the telescopic end of the fourth electric telescopic rod is connected to the fixed block.

[0013] Preferably, the fixed block has a sixth slot at the end away from the fourth electric telescopic rod, and the connecting block is slidably installed inside the sixth slot at the end near the fixed block. A pressure sensor is installed at the top of the inner wall of the sixth slot, and a spring telescopic rod is installed at the top of the connecting block. The end of the spring telescopic rod near the pressure sensor is connected to the pressure sensor.

[0014] Preferably, the lower mold has a second slot at its inner top, and a third electric telescopic rod is installed at the bottom of the inner wall of the second slot. The telescopic end of the third electric telescopic rod faces upward, and a first lifting plate is movably installed inside the second slot. The bottom end of the first lifting plate is connected to the telescopic end of the third electric telescopic rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, a movable block, a second extension plate, and a first lifting plate are provided. After the plastic melt is added to the lower and upper molds, the movable block abuts against the inner wall of the filling groove. At this time, the movable block and the second extension plate seal the filling groove. The second extension plate moves downward, which can squeeze the plastic melt in the lower and upper molds. Combined with the pressure sensor measuring the pressure value, the plastic melt can be pressurized, so that the plastic melt can fully fill all corners and details of the mold, reducing defects caused by insufficient filling, such as shrinkage cavities and depressions, and improving the finished product quality of the pipette tip. The use of the pressure sensor can also achieve precise control of the internal pressure value inside the upper and lower molds. When the pipette tip needs to be demolded after injection molding, the second extension plate moves upward into the filling tank, so that the bottom of the second extension plate separates from the pipette tip. Then, as the upper mold rises, the second extension plate moves downward. The downward movement of the second extension plate can assist in demolding the pipette tip from the upper mold, increasing the ease of use of the device. When cleaning the upper and lower molds, the inside of the injection tank is difficult to clean. The injection head of the injection molding machine disengages from the injection port and moves to a preset position. The top of the first lifting plate abuts against the bottom of the injection tank. Then, the movable block drives the second extension plate to move back into the fourth slot. During the movement of the movable block, the plastic residue remaining on the movable block and the second extension plate will fall to the top of the first lifting plate. Then, the first lifting plate continues to move upward until the top of the first lifting plate rises to the same horizontal height as the top of the injection port, which can push out the plastic residue and complete the cleaning of the injection tank, increasing the ease of use of the device. The first lifting plate extends upwards via the third electric telescopic rod, lifting the pipette tip to assist in demolding the tip from the lower mold. When the first lifting plate reaches the preset height, a pre-installed robotic arm outside the device clamps the tip. The first lifting plate then moves downwards to reset and return to the preset position. At this point, the pre-installed robotic arm clamps and unloads the tip. This method of unloading the finished pipette tip increases the ease of use of the device.

[0016] In this invention, a fixed plate and a movable plate are provided. After the plastic melt is added to the lower mold and the upper mold and the injection head of the injection molding machine leaves the injection port, the fixed plate extends downward. The fixed plate extends from the injection port into the interior of the injection groove until the bottom of the movable plate moves to below the bottom of the fourth slot. During the downward extension of the fixed plate, the fixed plate and the movable plate can scrape off the plastic melt remaining on the inner wall of the injection port and the injection groove, preventing the plastic melt from remaining on the inner wall of the injection port and the injection groove and affecting the next step of the device's use, thereby increasing the stability of the device's function. When the first lifting plate pushes the residual plastic residue from the second extension plate above the injection port, the two movable plates move closer together, clamping the plastic residue at the top of the first lifting plate. Then, an electric lifting rod moves the fixed plate, discharging the plastic residue held by the movable plates, thus cleaning the injection tank and increasing the ease of use of the device. Furthermore, it can centrally collect excess plastic residue generated during the injection molding process, enabling the recycling and reuse of excess waste plastic. The residual waste plastic does not fall into the environment and is not polluted; after recycling, it still retains high quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the second electric telescopic and positioning block installation structure of the present invention; Figure 4 This is a schematic diagram of the mounting structure of the first rotary motor of the present invention; Figure 5 This is a schematic diagram of the first lifting plate installation structure of the present invention; Figure 6 This is a schematic diagram of the installation structure of the third electric telescopic pole of the present invention; Figure 7 This is a schematic cross-sectional view of the upper mold structure of the present invention; Figure 8 This is a schematic diagram of the electric slider mounting structure of the present invention; Figure 9 This is a schematic diagram of the mounting structure of the first extension plate and the second extension plate of the present invention; Figure 10 This is a schematic diagram of the electric extension rod mounting structure of the present invention; Figure 11 This is a schematic diagram of the fifth slotted structure of the present invention; Figure 12 This is a schematic diagram of the installation structure of the fixing block and connecting block of the present invention; Figure 13 This is a cross-sectional view of the fixing block structure of the present invention.

[0018] In the diagram: 1. Lower mold; 2. Upper mold; 3. Electric lifting rod; 4. Fixed rod; 5. First electric telescopic rod; 6. Fixed plate; 7. Movable plate; 8. Filling port; 9. First slot; 10. Second electric telescopic rod; 11. Positioning block; 12. First rotary motor; 13. Second slot; 14. First lifting plate; 15. Third electric telescopic rod; 20. Filling slot; 21. Fourth slot; 22. Movable block; 23. Slide groove; 24. Electric slider; 26. Second extension plate; 28. Fifth slot; 29. ​​Fourth electric telescopic rod; 30. Fixed block; 31. Connecting block; 32. Sixth slot; 33. Pressure sensor; 34. Spring telescopic rod. Detailed Implementation

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

[0020] Reference Figure 1-13 A molding die for a pipette tip includes a lower die 1 and an upper die 2. The upper die 2 is located above the lower die 1. A filling groove 20 is provided through the top of the upper die 2. A filling port 8 is installed above the filling groove 20 on the top of the upper die 2. A first auxiliary mechanism is provided on the top of the upper die 2. A fourth slot 21 is provided on the side wall of the filling groove 20 on the upper die 2. A movable block 22 is movably installed inside the fourth slot 21. A second auxiliary mechanism is provided on the movable block 22. A first lifting plate 14 is movably installed at the top of the interior of the lower die 1. The injection port 8 connects to the injection head of the injection molding machine to inject molten plastic into the lower mold 1 and the upper mold 2. The first auxiliary mechanism can scrape off the residual molten plastic on the inner wall of the injection port 8 and the injection groove 20 after the molten plastic is injected, preventing the molten plastic residue on the inner wall of the injection port 8 and the injection groove 20 from affecting the next step of the device and increasing the stability of the device's function. The second auxiliary mechanism can pressurize and seal the molten plastic in the lower mold 1 and the upper mold 2. By pressurizing the molten plastic inside the lower mold 1 and the upper mold 2 through the second extension plate 26, the molten plastic can fully fill all corners and details of the mold, reducing defects caused by insufficient filling, such as shrinkage cavities and depressions, and improving the finished product quality of the pipette tip. The first lifting plate 14 can clean the inner wall of the injection port 8 and the injection groove 20, and can also assist in unloading the finished pipette tip.

[0021] As a technical optimization of the present invention, the first auxiliary mechanism includes an electric lifting rod 3, a fixed rod 4, and a fixed plate 6. The electric lifting rod 3 is movably mounted on the top of the upper mold 2, with its lifting end facing upwards. A fixed rod 4 is mounted on the lifting end of the electric lifting rod 3. A first electric telescopic rod 5 is mounted on the bottom of the fixed rod 4 away from the electric lifting rod 3, with its telescopic end facing downwards. A fixed plate 6 is mounted on the telescopic end of the first electric telescopic rod 5. Two movable plates 7 are movably mounted on the bottom of the fixed plate 6. The electric lifting rod 3 can drive the fixed rod 4 to rise, thereby changing the initial height of the fixed plate 6. The first electric telescopic rod 5 can drive the fixed plate 6 to move downwards. The movable plates 7 can be adjusted according to usage requirements.

[0022] As a technical optimization of the present invention, a first rotary motor 12 is embedded in the top of the upper mold 2, with the output end of the first rotary motor 12 facing upwards and connected to the mounting end of the electric lifting rod 3. The first rotary motor 12 can drive the electric lifting rod 3 to rotate, so that the operation of the device and the injection head performing injection molding operations on the upper mold 2 and lower mold 1 will not interfere with each other, thus increasing the smoothness of the device's function.

[0023] As a technical optimization of the present invention, the bottom ends of the fixed plate 6 are both provided with first slots 9. Second electric telescopic rods 10 are installed on the inner walls of the two adjacent first slots 9. The telescopic ends of the two second electric telescopic rods 10 are far apart. Positioning blocks 11 are installed on the telescopic ends of the second electric telescopic rods 10, and the bottom of the positioning blocks 11 is connected to the top of the movable plate 7. The second electric telescopic rods 10 can drive the positioning blocks 11 to move, thereby driving the movable plate 7 to move, allowing the two movable plates 7 to switch between different usage states according to different usage requirements.

[0024] As a technical optimization of the present invention, sliding grooves 23 are horizontally formed on both sides of the fourth slot 21. An electric slider 24 is installed on the side of the movable block 22 near the sliding groove 23, and the electric slider 24 is slidably installed inside the sliding groove 23. By sliding the electric slider 24 inside the sliding groove 23, the movable block 22 can move inside the fourth slot 21.

[0025] As a technical optimization of the present invention, the second auxiliary mechanism includes a second extension plate 26, which is movably mounted on the bottom of the movable block 22. The movement of the second extension plate 26 allows the device to fulfill different operational requirements.

[0026] As a technical optimization of the present invention, the bottom of the movable block 22 is evenly provided with a plurality of fifth slots 28, and a fixing block 30 is movably installed inside the fifth slot 28. A connecting block 31 is movably installed at the end of the fixing block 30 away from the movable block 22, and the end of the connecting block 31 near the second extension plate 26 is connected to the second extension plate 26. By movably connecting the second extension plate 26 to the connecting block 31, the second extension plate 26 can be converted into a corresponding usage mode according to different usage requirements, increasing the ease of use of the device.

[0027] As a technical optimization of the present invention, a fourth electric telescopic rod 29 is installed at the top of the inner wall of the fifth slot 28. The telescopic end of the fourth electric telescopic rod 29 faces the fixed block 30 and is connected to the fixed block 30. The fourth electric telescopic rod 29 extends downward, causing the second extension plate 26 to move downward. During the downward movement of the second extension plate 26, the molten plastic in the lower mold 1 and the upper mold 2 can be squeezed.

[0028] As a technical optimization of the present invention, a sixth slot 32 is provided at the end of the fixed block 30 away from the fourth electric telescopic rod 29, and the end of the connecting block 31 near the fixed block 30 is slidably installed inside the sixth slot 32. A pressure sensor 33 is installed at the top of the inner wall of the sixth slot 32, and a spring telescopic rod 34 is installed at the top of the connecting block 31. The end of the spring telescopic rod 34 near the pressure sensor 33 is connected to the pressure sensor 33. As the second extension plate 26 moves downward, it presses against the connecting block 31 under the reaction force of the molten plastic. The connecting block 31 slides into the sixth slot 32 and presses against the spring telescopic rod 34. The spring telescopic rod 34 presses against the pressure sensor 33. The pressure sensor 33 transmits the measured pressure value to the background control system. The fourth electric telescopic rod 29 continues to extend downward until the pressure value measured by the pressure sensor 33 reaches the preset pressure value. By pressurizing the molten plastic inside the lower mold 1 and the upper mold 2 through the second extension plate 26, the molten plastic can fully fill all corners and details of the mold, reducing defects caused by insufficient filling, such as shrinkage cavities and depressions, and improving the finished product quality of the pipette tip.

[0029] As a technical optimization of the present invention, a second slot 13 is provided at the top of the inner cavity of the lower mold 1. A third electric telescopic rod 15 is installed at the bottom of the inner wall of the second slot 13, with the telescopic end of the third electric telescopic rod 15 facing upward. A first lifting plate 14 is movably installed inside the second slot 13, and the bottom end of the first lifting plate 14 is connected to the telescopic end of the third electric telescopic rod 15. When cleaning the upper mold 2 and the lower mold 1, the inside of the injection groove 20 is difficult to clean. The injection head of the injection molding machine disengages from the injection port 8 and moves to a preset position. The top of the first lifting plate 14 abuts against the bottom of the injection groove 20. Then, the movable block 22 drives the second extension plate 26 to move back into the fourth slot 21. During the movement of the movable block 22, the plastic residue remaining on the movable block 22 and the second extension plate 26 will fall to the top of the first lifting plate 14. Then, the first lifting plate 14 continues to move upward until the top of the first lifting plate 14 rises to the same horizontal height as the top of the injection port 8, which can push out the plastic residue.

[0030] In use, all electrical components in this device are powered by an external power source connected via wires. The device is controlled by a control system. The upper mold 2 and lower mold 1 are existing mature technologies, so they will not be described in detail here. When in use, the device is connected to the injection port 8 via the injection head of the injection molding machine. The connection between the injection molding machine and the injection port 8 is an existing mature technology, so it will not be described in detail here. The top of the upper mold 2 is provided with a threaded hole. The telescopic end of the hydraulic rod is connected to the upper mold 2 by bolting it into the threaded hole, thereby enabling the upper mold 2 to move up and down.

[0031] After the molten plastic is filled into the lower mold 1 and the upper mold 2, and the injection head of the injection molding machine leaves the injection port 8, the first rotary motor 12 drives the electric lifting rod 3 to rotate, causing the fixed plate 6 to rotate directly above the injection port 8. Then, the first electric telescopic rod 5 drives the fixed plate 6 to extend downward. The fixed plate 6 extends from the injection port 8 into the interior of the injection groove 20 until the bottom of the movable plate 7 moves to below the bottom of the fourth slot 21. During the downward extension of the fixed plate 6, the fixed plate 6 and the movable plate 7 can scrape down the molten plastic remaining on the inner wall of the injection port 8 and the injection groove 20, preventing the molten plastic from remaining on the inner wall of the injection port 8 and the injection groove 20 and affecting the next step of the device's use, thus increasing the stability of the device's function.

[0032] Then, the fixed plate 6 moves upward until the bottom of the movable plate 7 moves above the top of the filling port 8. At this time, the electric slider 24 slides inside the groove 23, causing the movable block 22 to move out of the fourth slot 21 until the movable block 22 abuts against the inner wall of the filling groove 20. At this time, the movable block 22 and the second extension plate 26 complete the sealing of the filling groove 20. Then, the fourth electric telescopic rod 29 extends downward, causing the second extension plate 26 to move downward. During the downward movement of the second extension plate 26, the molten plastic in the lower mold 1 and the upper mold 2 can be squeezed. At this time, the second extension plate 26... Under the reaction force of the molten plastic, the connecting block 31 is squeezed, and the connecting block 31 slides into the interior of the sixth slot 32 and squeezes the spring telescopic rod 34. The spring telescopic rod 34 squeezes the pressure sensor 33, and the pressure sensor 33 transmits the measured pressure value to the background control system. The fourth electric telescopic rod 29 continues to extend downward until the pressure value measured by the pressure sensor 33 reaches the preset pressure value. By pressurizing the molten plastic inside the lower mold 1 and the upper mold 2 through the second extension plate 26, the molten plastic can fully fill all corners and details of the mold, reducing defects caused by insufficient filling.

[0033] When the pipette tip needs to be demolded after injection molding, the second extension plate 26 moves upward into the filling tank 20, separating the bottom of the second extension plate 26 from the pipette tip. Then, as the upper mold 2 rises, the second extension plate 26 moves downward, assisting in the demolding of the pipette tip from the upper mold 2. When the upper mold 2 stops moving at a preset height, the third electric telescopic rod 15 drives the first lifting plate 14 to extend upward, lifting the pipette tip upward to assist in demolding the pipette tip from the lower mold 1. When the first lifting plate 14 lifts the pipette tip to the preset height, a pre-installed robotic arm clamps the pipette tip. Then, the first lifting plate 14 moves downward to reset and continue moving until it reaches the desired height. Figure 5 As shown in the indicated position, the pre-set robotic arm outside the device clamps and dispenses the pipette tip. This method of dispensing the pipette tip increases the ease of use of the device.

[0034] When cleaning the upper mold 2 and lower mold 1, after the workers have cleaned the mold cores of the lower mold 1 and upper mold 2, the inside of the injection groove 20 is difficult to clean. The injection head of the injection molding machine disengages from the injection port 8 and moves to a preset position. Then, the first lifting plate 14 moves upward, so that the top of the first lifting plate 14 abuts against the bottom of the injection groove 20. The movable block 22 drives the second extension plate 26 to move back into the fourth slot 21. During the movement of the movable block 22, the plastic residue remaining on the movable block 22 and the second extension plate 26 will fall to the top of the first lifting plate 14. Then, the first lifting plate 14 continues to move upward until the top of the first lifting plate 14 rises to the injection port 8. At the same horizontal height as the top of the filling port 8, the fixed plate 6 moves to directly above the filling port 8. Then, the second electric telescopic rod 10 drives the two movable plates 7 to move away from each other until the movable plates 7 move to the preset position. Then, the fixed plate 6 moves downward until the bottom of the movable plates 7 moves to the same horizontal height as the top of the filling port 8. Then, by moving the two movable plates 7 closer to each other, the two movable plates 7 can clamp the plastic residue on the top of the first lifting plate 14. Then, the fixed plate 6 can be moved by the electric lifting rod 3 to discharge the plastic residue clamped by the movable plates 7, thus completing the cleaning of the filling tank 20 and increasing the ease of use of the device.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A molding die for a pipette tip, comprising a lower die (1) and an upper die (2), characterized in that, The lower mold (1) is provided with an upper mold (2) above it. The top of the upper mold (2) is provided with a filling groove (20). The top of the upper mold (2) is provided with a filling port (8) above the filling groove (20). The top of the upper mold (2) is provided with a first auxiliary mechanism. The upper mold (2) is provided with a fourth slot (21) on the side wall of the filling groove (20). A movable block (22) is movably installed inside the fourth slot (21). A second auxiliary mechanism is provided on the movable block (22). The top of the lower mold (1) is movably installed with a first lifting plate (14). The first auxiliary mechanism includes an electric lifting rod (3), a fixed rod (4) and a fixed plate (6). The electric lifting rod (3) is movably installed on the top of the upper mold (2). The lifting end of the electric lifting rod (3) faces upward. The lifting end of the electric lifting rod (3) is installed with a fixed rod (4). The bottom of the fixed rod (4) away from the electric lifting rod (3) is installed with a first electric telescopic rod (5). The telescopic end of the first electric telescopic rod (5) faces downward. The telescopic end of the first electric telescopic rod (5) is installed with a fixed plate (6). Two movable plates (7) are movably installed at the bottom of the fixed plate (6). The second auxiliary mechanism includes a second extension plate (26), and the second extension plate (26) is movably mounted on the bottom of the movable block (22). The bottom ends of the fixed plate (6) are provided with first slots (9), and the inner walls of the two first slots (9) are close to each other. The telescopic ends of the two second electric telescopic rods (10) are far apart from each other. The telescopic ends of the second electric telescopic rods (10) are provided with positioning blocks (11), and the bottom of the positioning blocks (11) is connected to the top of the movable plate (7). The fourth slot (21) has horizontally opened sliding grooves (23) on both sides. An electric slider (24) is installed on the side of the movable block (22) near the sliding groove (23). The electric slider (24) is slidably installed inside the sliding groove (23). The lower mold (1) has a second slot (13) at its top interior. A third electric telescopic rod (15) is installed at the bottom of the inner wall of the second slot (13). The telescopic end of the third electric telescopic rod (15) faces upward. A first lifting plate (14) is movably installed inside the second slot (13). The bottom end of the first lifting plate (14) is connected to the telescopic end of the third electric telescopic rod (15).

2. The molding die for a pipette tip according to claim 1, characterized in that, The top of the upper mold (2) is embedded with a first rotary motor (12), the output end of the first rotary motor (12) faces upward, and the output end of the first rotary motor (12) is connected to the mounting end of the electric lifting rod (3).

3. The molding die for a pipette tip according to claim 2, characterized in that, The bottom of the movable block (22) is evenly provided with a plurality of fifth slots (28). A fixed block (30) is movably installed inside the fifth slot (28). A connecting block (31) is movably installed at the end of the fixed block (30) away from the movable block (22). The end of the connecting block (31) near the second extension plate (26) is connected to the second extension plate (26).

4. The molding die for a pipette tip according to claim 3, characterized in that, The top of the inner wall of the fifth slot (28) is equipped with a fourth electric telescopic rod (29), the telescopic end of the fourth electric telescopic rod (29) faces the fixed block (30), and the telescopic end of the fourth electric telescopic rod (29) is connected to the fixed block (30).

5. The molding die for a pipette tip according to claim 4, characterized in that, The fixed block (30) has a sixth slot (32) at the end away from the fourth electric telescopic rod (29). The connecting block (31) is slidably installed inside the sixth slot (32) at the end near the fixed block (30). A pressure sensor (33) is installed at the top of the inner wall of the sixth slot (32). A spring telescopic rod (34) is installed at the top of the connecting block (31). The end of the spring telescopic rod (34) near the pressure sensor (33) is connected to the pressure sensor (33).

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