Injection molding equipment for infusion set production

Abstract

The present invention provides an injection molding device for producing infusion pumps, which relates to the technical field of injection molding of infusion pumps, including an extruder and a cooling water trough, wherein a partition is installed in the cooling water trough, the partition divides the cooling water trough into water trough 1 and water trough 2, overflow ports are provided at both ends of the cooling water trough and on the partition, a transition piece is installed at the overflow port, the transition piece is provided with an overflow trough, a rotating cover is rotatably connected to the transition piece, a baffle is provided on the rotating cover, the baffle can block the upper part of the overflow trough and leave overflow hole 1; an upper guide wheel and a lower guide wheel are rotatably installed in water trough 1, a delivery channel is left between the upper guide wheel and the lower guide wheel for an infusion tube to pass through, and after passing through overflow hole 1, the infusion tube can pass through the delivery channel in a horizontal state. The infusion tube of the present invention is located in the delivery channel in overflow hole 1 and water trough 1 and can maintain a horizontal state, which is conducive to reducing the occurrence of uneven tube wall thickness caused by the tilt of the infusion tube.

Description

Technical Field

[0001] The present invention relates to the technical field of injection molding of infusion sets, and in particular to an injection molding device for producing infusion sets. Background Art

[0002] Infusion sets are primarily used for intravenous infusion and typically include an IV needle, needle cap, IV tubing, and drip bottles. Traditional IV tubing is mostly extruded from polyvinyl chloride (PVC) using injection molding equipment. Plastic pellets are added to the injection molding machine, where they are propelled forward by the rotating screw. Simultaneously, the pellets are heated to a molten state in a heating zone, allowing the IV tubing to be extruded through a die. After extrusion, the tubing is still molten and needs to be immediately cooled in a cooling tank or cooling device to quickly set its shape.

[0003] For example, patent document CN112277277B discloses a catheter manufacturing device and an infusion pump production process using the device. The catheter manufacturing device includes a catheter forming device installed at the extruder outlet to form the material into a catheter. Following the direction of the catheter's movement, a catheter cooling drive device is installed behind the catheter forming device to move and cool the catheter, and a catheter slitting device is installed to cut the catheter to a fixed length. The catheter cooling drive device includes a cooling water tank with water inlet grooves at both ends. The water inlet grooves are rotatably connected to end guide wheels. The cooling water tank can be equipped with cooling guide wheels. The catheter is transferred from the upper portion of the end guide wheels to the cooling water tank and then transferred from the lower portion of the cooling guide wheels.

[0004] During the cooling process of the extruded infusion tube by the above-mentioned catheter manufacturing equipment, the catheter enters the cooling water tank from the water inlet trough. In order to allow the infusion tube to be completely immersed in the cooling water pool, the cooling guide wheel is used to press the infusion tube downward. However, this will cause the section of the infusion tube from the water inlet trough to the cooling guide wheel to be in an inclined state. The extruded infusion tube has a large plastic deformation capacity before being cooled and formed. At this time, the infusion tube is in an inclined state, which may cause uneven wall thickness at the inclined part of the infusion tube, thereby affecting the molding quality of the infusion tube. Summary of the Invention

[0005] In view of this, the present invention provides an injection molding device for producing infusion pumps, which solves the technical problem in the prior art that the extruded infusion tube is in an inclined state when entering the cooling water tank for cooling, resulting in uneven wall thickness of the infusion tube.

[0006] To solve the above technical problems, the present invention provides an injection molding device for producing infusion sets, comprising an extruder and a cooling water trough arranged at the output end of the extruder, wherein a partition is installed in the cooling water trough, and the partition divides the cooling water trough into a water trough 1 near one end of the extruder and a water trough 2 far from the end of the extruder, and overflow ports are provided at both ends of the cooling water trough and on the partition, and a transition piece is installed at the overflow port near one end of the extruder, and the transition piece is provided with an overflow trough connected to the overflow port, and a rotary cover is rotatably connected to the transition piece, and the rotary cover is provided with a baffle, which can block the upper part of the overflow trough and leave an overflow hole 1 for allowing an infusion tube and cooling water to pass through;

[0007] An upper guide wheel and a lower guide wheel are rotatably installed in the water tank. A delivery channel for allowing the infusion tube to pass through is reserved between the upper guide wheel and the lower guide wheel. After the infusion tube passes through the overflow hole one, it can pass through the delivery channel in a horizontal state.

[0008] By adopting the above technical solution, the rotating cover is rotated 180°, positioning it at the lower end of the transition piece. The baffle on the rotating cover releases its obstruction on the upper portion of the overflow trough, opening the upper end of the overflow trough. This facilitates the delivery of the extruded infusion tube to the overflow trough, the overflow port near one end of the extruder, and the transfer channel between the upper and lower guide wheels. The rotating cover is then rotated another 180°, with the baffle blocking the upper portion of the overflow trough, allowing the infusion tube to be positioned within overflow hole 1. At this point, the infusion tube remains horizontal within overflow hole 1 and the transfer channel, helping to reduce uneven tube wall thickness caused by tilting the tube. After passing through the transfer channel, the infusion tube flows through the overflow port on the partition into water tank 2. As the cooling water level in water tanks 1 and 2 rises, rising above overflow hole 1, the infusion tube is fully immersed in the cooling water in water tank 1, cooling the tube within water tank 1.

[0009] Preferably, a diversion hole connected to the overflow port is provided on the baffle, a diversion pipe is installed at the diversion hole, a diversion port is provided below the diversion pipe, an adjustment plate is slidingly provided in the diversion pipe to open or close the diversion port, and a reset spring is connected between the adjustment plate and the diversion pipe.

[0010] By adopting this technical solution, when the water supply pressure in tank one fluctuates, the water flow velocity at the overflow port changes. This change in flow velocity can cause the water flow in tank one to shift from laminar to turbulent, which can lead to uneven cooling of the infusion tube surface. When the water pressure at the overflow port increases, cooling water can flow from the diverter hole into the diverter tube, pushing the regulating plate to move, opening the diverter hole and allowing the cooling water in the diverter tube to flow out of the diverter hole, reducing the probability of turbulence at the overflow port.

[0011] Preferably, diversion plates are installed on both sides of the diversion pipe, an arc-shaped groove is opened at the lower part of the baffle, an arc-shaped plate is installed at the arc-shaped groove, the arc-shaped plate is located between the two diversion plates, and a diversion channel is left between the two diversion plates and the arc-shaped plates, and the diversion channel is connected to the diversion port.

[0012] By adopting the above technical solution, the cooling water flowing out from the diversion port enters the two diversion channels respectively, and flows downstream through the diversion channels, thereby cooling the ambient temperature of the front-end infusion tube. At the same time, it is beneficial to purify the air in the front-end infusion tube, and can play a certain protective role for the front-end infusion tube.

[0013] Preferably, a limit strip is installed on one side of the overflow hole 1 on the transition piece, and the lower end of the baffle is located on both sides of the arc groove and is provided with a slot matching the limit strip.

[0014] By adopting the above technical solution, the limiting strip cooperates with the card slot to limit the angle at which the baffle rotates following the rotating cover.

[0015] Preferably, the upper ends of the rotating cover and the baffle are both provided with limiting grooves, the upper end of the water tank is hinged with a cover plate, and the end of the cover plate close to the rotating cover is connected to a limiting block that can cooperate with the limiting groove.

[0016] By adopting the above technical solution, after the infusion tube is sent into the water tank, the rotating cover is rotated to close the upper end of the overflow tank. When the rotating cover is rotated into place, the card slot contacts the limit bar, the limit slot is located directly above, the cover is closed, and the limit block is located in the limit slot, which can limit the rotating cover.

[0017] Preferably, baffles are provided at both ends of the cover plate, which can block the upper part of the overflow port and leave a second overflow hole for the liquid infusion pipe and cooling water to pass through.

[0018] By adopting the above technical solution, the baffle can block the upper part of the overflow outlet at both ends of the water tank, which is conducive to making the liquid level of the water tank horizontal, thereby facilitating uniform cooling of the infusion tube.

[0019] Preferably, the transition piece is cylindrical, a dovetail block is provided on the circumference of the transition piece, and a dovetail groove that cooperates with the dovetail block is provided on the rotating cover.

[0020] By adopting the above technical solution, the dovetail groove on the rotating cover can slide with the dovetail block on the transition piece, allowing the rotating cover to rotate along the circumference of the transition piece, thereby enabling the baffle on the rotating cover to open or block the overflow trough. The transition piece is designed as a hollow structure, allowing cooling water in water tank 1 to enter the transition piece through the overflow port. Because the volume of the transition piece is smaller than that of water tank 1, and the extruded infusion tube first enters the transition piece through overflow port 1 before entering water tank 1, the temperature of the cooling water in the transition piece is higher than that of the cooling water in water tank 1. The extruded infusion tube is still in a high-temperature molten state immediately after exiting the die, requiring a brief air cooling period for initial cooling and setting. If it enters water tank 1 directly, the sudden cooling may cause uneven material shrinkage, surface deformation, or internal stress, affecting the physical properties and appearance quality of the infusion tube. The infusion tube of the present invention is initially cooled in the transition piece and then cooled again in water tank 1, which helps minimize the impact of sudden temperature drops on the quality of the infusion tube.

[0021] Preferably, water storage tanks are provided at both ends of the cooling water tank, a water outlet is provided at the lower portion of the water storage tank, and a water inlet is provided at the lower portion of water tank one and water tank two, and the water inlet and the water outlet are connected by a pipe.

[0022] By adopting the above technical solution, the cooling water overflowing from the overflow ports at both ends of the cooling water tank flows into the water storage tank, and then enters the water tank one and the water tank two through the pipe, realizing the circulation of the cooling water.

[0023] Preferably, a plurality of lower guide wheels are also installed in the second water tank.

[0024] By adopting the above technical solution, the lower guide wheel supports the infusion tube, which is conducive to maintaining the infusion tube in a horizontal state in the second water tank.

[0025] Preferably, a rack is provided below the cooling water trough, and a screw elevator capable of driving the cooling water trough to move up and down is provided on the rack.

[0026] By adopting the above technical solution, the screw lift can drive the cooling water trough to rise and fall, which is convenient for adjusting the height of the cooling water trough so that the height of the overflow hole 1 matches the height of the output end of the extruder, so that the infusion tube extruded from the extruder can pass through the overflow hole 1 in a horizontal state and enter the water trough 1 and continue to maintain a horizontal state, which is conducive to reducing the occurrence of uneven wall thickness caused by the tilt of the infusion tube.

[0027] The beneficial effects of the above technical solution of the present invention are as follows:

[0028] 1. The rotating member of the present invention can rotate on the transition member, thereby controlling the opening and closing of the overflow trough on the transition member. When the overflow trough is open, the extruded infusion liquid can be easily delivered to the water tank. When the overflow trough is closed, the infusion tube can be easily positioned in the overflow hole. The infusion tube is located in the delivery channel between the overflow hole and the water tank and can maintain a horizontal state, which helps to reduce the occurrence of uneven wall thickness of the infusion tube caused by the inclination of the infusion tube.

[0029] 2. The present invention provides a diversion pipe at the overflow port. When the water pressure at the overflow port increases, cooling water can flow from the diversion hole into the diversion pipe and push the adjustment plate to move, so that the diversion port is opened, and the cooling water in the diversion pipe flows out from the diversion port, reducing the probability of turbulence occurring at the overflow hole, thereby facilitating uniform cooling of the infusion tube.

[0030] 3. The cooling water flowing out of the diversion port enters the two diversion channels respectively, and flows down through the diversion channels to cool down the ambient temperature of the front-end infusion tube. At the same time, it is beneficial to purify the air in the front-end infusion tube and can play a certain protective role for the front-end infusion tube.

[0031] 4. The transition piece is cylindrical. The cooling water in the water tank can enter the transition piece through the overflow port. The extruded infusion tube is first cooled in the transition piece and then cooled again in the water tank, which helps to reduce the impact of sudden temperature drop on the quality of the infusion tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of the injection molding equipment for producing the infusion set of the present invention;

[0033] Figure 2 A side view of the cooling water tank of the present invention;

[0034] Figure 3 is a cross-sectional view of the cooling water tank of the present invention;

[0035] Figure 4 It is a partial structural diagram of a water tank 1 of the present invention;

[0036] Figure 5 It is a side view of a water tank of the present invention without the diverter pipe;

[0037] Figure 6 for Figure 2 A cross-sectional view of the water tank at AA;

[0038] Figure 7 is a cross-sectional view of the rotary cover and transition piece of the present invention;

[0039] Figure 8 is a side view of the shunt pipe of the present invention;

[0040] Figure 9 for Figure 8 Cross-sectional view of the shunt pipe BB in FIG.

[0041] In the figure: 1. Extruder; 2. Cooling water trough; 21. Water trough 1; 22. Water trough 2; 23. Partition; 231. Overflow port; 232. Overflow port 2; 24. Cover plate; 241. Stop block; 242. Baffle; 25. Upper guide wheel; 26. Lower guide wheel; 27. Water inlet; 3. Frame; 31. Screw elevator; 4. Transition piece; 41. Overflow trough; 411. Overflow port 1; 412. Dovetail block; 42. Limiting strip; 5. Rotating cover; 51. Dovetail groove; 52. Baffle; 521. Arc groove; 522. Diverter hole; 53. Limiting groove; 6. Water storage tank; 61. Water outlet; 7. Diverter pipe; 71. Diverter port; 72. Adjusting plate; 73. Adjusting rod; 74. Return spring; 75. Diverter plate; 76. Arc plate; 77. Diverter channel; 78. Connecting pipe. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figures 1-9 , clearly and completely describe the technical solutions of the embodiments of the present invention.

[0043] Example

[0044] This embodiment provides an injection molding device for producing an infusion set, such as Figure 1 As shown, it includes an extruder 1 and a cooling water tank 2.

[0045] like Figure 1 and Figure 3 As shown, the cooling water trough 2 is arranged at the output end of the extruder 1, and a partition 23 is installed in the cooling water trough 2, which divides the cooling water trough 2 into a water trough 1 21 and a water trough 2 22. The end close to the extruder 1 is the water trough 1 21, and the end away from the extruder 1 is the water trough 2 22.

[0046] like Figure 1 and Figure 3 As shown, the infusion tube extruded from the extruder 1 passes through the water tank 1 21 and the water tank 2 22 in sequence. The water tank 1 21 and the water tank 2 22 store cooling water that can cool the infusion tube.

[0047] like Figure 1 and Figure 6 As shown, overflow ports 231 are provided at both ends of the cooling water tank 2 and on the partition 23. The lower portion of the overflow port 231 is arc-shaped. The overflow port 231 allows the cooling water in the cooling water tank 2 to flow, and also allows the extruded infusion tube to pass through.

[0048] like Figure 2As shown, a frame 3 is provided below the cooling water tank 2, and a screw lift 31 is provided on the frame 3 to drive the cooling water tank 2 to rise and fall. The screw lift 31 in this embodiment is a manual screw lift 31 commonly used on the market, and can also be designed as an electric screw lift 31.

[0049] like Figure 2 As shown, the screw elevator 31 can drive the cooling water trough 2 to rise and fall, making it easy to adjust the height of the cooling water trough 2 so that the height of the overflow port 231 matches the height of the output end of the extruder 1, thereby enabling the infusion tube extruded from the extruder 1 to pass through the overflow port 231 in a horizontal state, which is beneficial to reducing the occurrence of uneven wall thickness caused by the tilt of the infusion tube.

[0050] like Figure 4 and Figure 7 As shown, a cylindrical transition piece 4 is installed at the overflow port 231 of the water tank 21 near one end of the extruder 1, and the axial direction of the transition piece 4 is parallel to the conveying direction of the conveying pipe.

[0051] like Figure 4 and Figure 7 As shown, an overflow groove 41 communicating with the overflow port 231 is provided downwardly from the top of the transition piece 4 , and the lower portion of the overflow groove 41 is also arc-shaped, and the size of the overflow groove 41 is consistent with that of the overflow port 231 .

[0052] like Figure 4 and Figure 7 As shown, the cooling water in water tank 1 21 can enter the interior of transition piece 4 through overflow port 231. Because the volume of transition piece 4 is smaller than that of water tank 1 21, and the extruded infusion tube passes through transition piece 4 before entering water tank 1 21, the temperature of the cooling water in transition piece 4 is higher than that of the cooling water in water tank 1 21. The infusion tube is initially cooled in transition piece 4 and then further cooled in water tank 1 21, which helps to reduce the impact of sudden temperature drops on the quality of the infusion tube.

[0053] like Figure 4 As shown, a dovetail block 412 is provided on the circumferential side of the transition piece 4, that is, the dovetail block 412 is arranged around the circumferential side of the transition piece 4, and along the circumferential direction of the transition piece 4, the cross-section of the dovetail block 412 is dovetail-shaped.

[0054] like Figure 4As shown, a rotating cover 5 is rotatably connected to the transition piece 4. The inner wall of the rotating cover 5 is provided with a dovetail groove 51 that mates with the dovetail block 412, allowing the rotating cover 5 to rotate along the circumference of the transition piece 4. A baffle 52 is connected to the end of the rotating cover 5 away from the water trough 21. The baffle 52's surface is perpendicular to the axial direction of the transition piece 4, and an arcuate groove 521 is defined at its lower end. When the rotating cover 5 rotates above the transition piece 4, the baffle 52 blocks the upper portion of the overflow trough 41, leaving an overflow hole 411 between the arcuate groove 521 of the baffle 52 and the lower portion of the overflow trough 41 for the passage of the infusion tube and cooling water.

[0055] like Figure 4 and Figure 5 As shown, a limit strip 42 is installed in the middle of the transition piece 4 and on one side of the overflow hole 411 , and the lower end of the baffle 52 is located on both sides of the arc groove 521 and has slots (not marked in the figure) matching the limit strip 42 .

[0056] like Figure 5 and Figure 7 As shown, the limiting strip 42 cooperates with the slot to limit the angle at which the baffle 52 rotates following the rotating cover 5. When the rotating cover 5 rotates to the bottom of the transition piece 4, the slot on one side of the baffle 52 abuts the limiting strip 42, and the baffle 52 releases its obstruction on the upper portion of the overflow trough 41, opening the upper end of the overflow trough 41. This facilitates the sequential delivery of the extruded infusion tube into the overflow trough 41, the overflow port 231 near one end of the extruder 1, and finally into the water tank 1 21.

[0057] like Figure 5 As shown, when the rotatable cover 5 rotates above the transition piece 4, the other side slot of the baffle 52 abuts against the limiting strip 42, blocking the upper portion of the overflow trough 41. The infusion tube is positioned within overflow hole 1 411. As the cooling water level within the water tank 1 21 rises, the level rises above overflow hole 1 411, facilitating complete immersion of the infusion tube in the cooling water within the water tank 1 21, thereby improving uniformity in cooling the infusion tube.

[0058] like Figure 4 As shown, the upper ends of the rotating cover 5 and the baffle 52 are both provided with a limiting groove 53, the upper end of the water tank 21 is hinged with a cover plate 24, and the end of the cover plate 24 close to the rotating cover 5 is connected to a limiting block 241 that can cooperate with the limiting groove 53.

[0059] like Figure 4 and Figure 5 As shown, after the infusion tube is sent into the water tank 21, the rotating cover 5 is rotated to close the upper end of the overflow groove 41. When the rotating cover 5 is rotated into place, the card slot contacts the limit bar 42, the limit groove 53 is located directly above, the cover plate 24 is covered, and the limit block 241 is located in the limit groove 53, which can limit the rotating cover 5.

[0060] like Figure 6 and Figure 7 As shown, baffles 242 are provided at both ends of the cover plate 24. The surface of baffles 242 is parallel to the surface of baffle 52. Baffles 242 block the upper portion of the overflow ports 231 at both ends of the water tank 1 21 and leave overflow holes 232 for the liquid infusion tube and cooling water to pass through. The size of overflow hole 232 is the same as that of overflow hole 1 411.

[0061] like Figure 6 and Figure 7 The baffle 242 shown can block the upper portion of the overflow port 231 at both ends of the water tank 21, which is beneficial for keeping the liquid surface of the water tank 21 in a horizontal state, thereby facilitating uniform cooling of the infusion tube.

[0062] like Figure 3 As shown, an upper guide wheel 25 and a lower guide wheel 26 are rotatably mounted within the water tank 1 21 . The upper guide wheel 25 is rotatably mounted on the lower portion of the cover plate 24 , while the lower guide wheel 26 is rotatably mounted on the bottom of the water tank 1 21 . Multiple upper guide wheels 25 and lower guide wheels 26 are provided, spaced apart. The axes of the upper guide wheels 25 and lower guide wheels 26 are parallel and perpendicular to the delivery direction of the infusion tube.

[0063] like Figure 3 and Figure 4 As shown, a delivery channel is left between the upper guide wheel 25 and the lower guide wheel 26 for the infusion tube to pass through. The height of the delivery channel matches the height of the overflow hole 411, so that the infusion tube can pass through the delivery channel in a horizontal state after passing through the overflow hole 411, which is beneficial to reduce the occurrence of uneven wall thickness of the infusion tube caused by the tilt of the infusion tube.

[0064] like Figure 3 As shown, a plurality of lower guide wheels 26 are also installed at intervals in the water tank 22. The lower guide wheels 26 support the infusion tube, which helps the infusion tube to maintain a horizontal state in the water tank 22.

[0065] like Figure 2 and Figure 3 As shown, water storage tanks 6 are provided at both ends of the cooling water tank 2, and a water outlet 61 is provided at the lower part of the water storage tank 6. Water inlets 27 are provided at the lower parts of water tank 1 21 and water tank 2 22, and the water inlet 27 and the water outlet 61 are connected by a pipe (not marked in the figure).

[0066] like Figure 1 and Figure 2 As shown, the cooling water overflowing from the overflow ports 231 at both ends of the cooling water tank 2 flows into the water storage tank 6, and then enters the water tank 1 21 and the water tank 2 22 through the pipe, realizing the circulation of the cooling water.

[0067] like Figure 5As shown, the baffle 52 is provided with a diversion hole 522 connected to the overflow port 231, and the diversion hole 522 is located above the overflow hole 411. Figure 4 As shown, a diverter pipe 7 is installed at the diverter hole 522, and the axial direction of the diverter pipe 7 is parallel to the axial direction of the transition piece 4. Figure 9 As shown, a diversion opening 71 is defined below the diversion tube 7. An adjustment plate 72 is slidably mounted within the diversion tube 7, capable of opening or closing the diversion opening 71. The end of the diversion tube 7, away from the diversion hole 522, is sealed. An adjustment rod 73 is connected to the end of the adjustment plate 72, away from the diversion hole 522. A connecting tube 78 is fixedly mounted within the diversion tube 7, and the adjustment rod 73 is slidably coupled within the connecting tube 78. A return spring 74 is sleeved around the connecting tube 78, with its ends connected to the connecting tube 78 and the adjustment plate 72, respectively.

[0068] like Figure 4 、 Figure 8 and Figure 9 As shown, diverter plates 75 are installed on both sides of the lower portion of the diverter tube 7, and both diverter plates 75 are tilted downward. A curved plate 76 is installed in the arcuate groove 521 on the baffle 52. The curved plate 76 is located between the two diverter plates 75, and the ends of the curved plate 76 are connected to the two diverter plates 75. A diverter channel 77 is left between the two diverter plates 75 and the curved plate 76, and the diverter channel 77 is connected to the diverter port 71.

[0069] like Figure 5 and Figure 9 As shown, when the water pressure at overflow port 231 near the end of extruder 1 within water tank 1 increases, the cooling water within water tank 1 can flow from diverter hole 522 into diverter tube 7, pushing adjustment plate 72 to move, opening diverter hole 71. The cooling water within diverter tube 7 flows out from diverter hole 71, reducing the probability of turbulence at overflow port 1 411, thereby facilitating uniform cooling of the infusion tube. When the water pressure at overflow port 231 near the end of extruder 1 within water tank 1 decreases, the elastic force of return spring 74 resets adjustment plate 72 and blocks diverter hole 71.

[0070] like Figure 8 and Figure 9 As shown, the cooling water flowing out of the diversion port 71 enters two diversion channels 77 and flows down through the diversion channels 77. Since the front end infusion tube is located below the curved plate 76 and below the two diversion channels 77, the cooling water flowing down from the two diversion channels 77 can cool the ambient temperature of the front end infusion tube and help purify the air in the front end infusion tube, thus providing a certain degree of protection for the front end infusion tube.

[0071] The implementation principle of the injection molding equipment for producing infusion sets in this embodiment is as follows:

[0072] Open the cover 24 and rotate the rotary cover 5 180° so that the rotary cover 5 is at the lower end of the transition piece 4. The baffle 52 on the rotary cover 5 releases the obstruction on the upper part of the overflow trough 41, so that the upper end of the overflow trough 41 is opened, so that the extruded infusion tube is sequentially fed into the overflow trough 41 and the overflow port 231 near one end of the extruder 1, and then continues to be fed into the conveying channel between the upper guide wheel 25 and the lower guide wheel 26. After passing through the conveying channel, the infusion tube reaches the water tank 2 22.

[0073] The rotating cover 5 is rotated 180 degrees in the opposite direction, and the baffle 52 blocks the upper part of the overflow groove 41, and the infusion tube is in the overflow hole 1 411. The cover plate 24 is covered, and the limit block 241 is located in the limit groove 53, which can limit the rotating cover 5.

[0074] Cooling water is injected into water tank 1 21 and water tank 2 22. As the cooling water level in water tank 1 21 and water tank 2 22 rises, it rises above overflow hole 1 411, allowing the infusion tube to be fully immersed in the cooling water in water tank 1 21. The cooling water cools the infusion tube in water tank 1 21. The cooling water flows out of overflow hole 1 411 and flows into water storage tank 6 through overflow ports 231 at both ends of cooling water tank 2. Then, it enters water tank 1 21 and water tank 2 22 through pipes, completing the cooling water circulation process.

[0075] When the water pressure at the overflow port 231 near one end of the extruder 1 in the water tank 21 increases, the cooling water in the water tank 21 can flow into the diversion pipe 7 from the diversion hole 522 and push the adjustment plate 72 to move, so that the diversion port 71 opens. After the cooling water in the diversion pipe 7 flows out from the diversion port 71, it enters the two diversion channels 77 respectively and flows downward through the diversion channels 77.

[0076] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it 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, or it can be the internal connection of two components.

Claims

1. An injection molding device for producing an infusion set, comprising an extruder (1) and a cooling water tank (2) arranged at the output end of the extruder (1), characterized in that: A partition (23) is installed in the cooling water trough (2), and the partition (23) divides the cooling water trough (2) into a water trough 1 (21) near one end of the extruder (1) and a water trough 2 (22) away from one end of the extruder (1). Overflow ports (231) are provided at both ends of the cooling water trough (2) and on the partition (23). A transition piece (4) is installed at the overflow port (231) near one end of the extruder (1). An overflow trough (41) communicating with the overflow port (231) is provided on the transition piece (4). A rotary cover (5) is rotatably connected to the transition piece (4), and a baffle (52) is provided on the rotary cover (5). The baffle (52) can block the upper part of the overflow trough (41) and leave an overflow hole 1 (411) for allowing the infusion tube and cooling water to pass through. An upper guide wheel (25) and a lower guide wheel (26) are rotatably mounted in the water tank (21). A delivery channel is left between the upper guide wheel (25) and the lower guide wheel (26) for allowing the infusion tube to pass through. After the infusion tube passes through the overflow hole (411), it can pass through the delivery channel in a horizontal state. A diversion hole (522) communicating with the overflow port (231) is provided on the baffle (52), a diversion pipe (7) is installed at the diversion hole (522), a diversion port (71) is provided below the diversion pipe (7), an adjustment plate (72) is slidably provided in the diversion pipe (7) and capable of opening or closing the diversion port (71), and a return spring (74) is connected between the adjustment plate (72) and the diversion pipe (7).

2. The injection molding equipment for producing infusion sets according to claim 1, characterized in that: A diverter plate (75) is installed on both sides of the diverter pipe (7). An arc groove (521) is provided at the lower portion of the baffle (52). An arc plate (76) is installed at the arc groove (521). The arc plate (76) is located between the two diverter plates (75). A diverter channel (77) is left between the two diverter plates (75) and the arc plate (76). The diverter channel (77) is communicated with the diverter port (71).

3. The injection molding equipment for producing infusion sets according to claim 2, characterized in that: A limit strip (42) is installed on one side of the overflow hole (411) on the transition piece (4), and a clamping groove matching the limit strip (42) is provided on both sides of the arc groove (521) at the lower end of the baffle (52).

4. The injection molding equipment for producing infusion sets according to claim 3, characterized in that: The upper ends of the rotating cover (5) and the baffle (52) are both provided with a limiting groove (53), the upper end of the water tank (21) is hingedly connected to a cover plate (24), and the end of the cover plate (24) close to the rotating cover (5) is connected to a limiting block (241) that can cooperate with the limiting groove (53).

5. The injection molding equipment for producing infusion sets according to claim 4, characterized in that: Both ends of the cover plate (24) are provided with baffles (242), which can block the upper part of the overflow port (231) and leave a second overflow hole (232) for the liquid delivery pipe and cooling water to pass through.

6. The injection molding equipment for producing infusion sets according to claim 5, characterized in that: The transition piece (4) is cylindrical, a dovetail block (412) is provided on the circumference of the transition piece (4), and a dovetail groove (51) that cooperates with the dovetail block (412) is provided on the rotating cover (5).

7. The injection molding equipment for producing infusion sets according to claim 6, characterized in that: Both ends of the cooling water tank (2) are provided with water storage tanks (6), the lower portion of the water storage tank (6) is provided with a water outlet (61), the lower portions of the water tank 1 (21) and the water tank 2 (22) are provided with a water inlet (27), and the water inlet (27) and the water outlet (61) are connected by a pipe.

8. The injection molding equipment for producing infusion sets according to claim 7, characterized in that: A plurality of lower guide wheels (26) are also installed in the water tank 2 (22).

9. The injection molding equipment for producing infusion sets according to claim 8, characterized in that: A frame (3) is provided below the cooling water trough (2), and a screw elevator (31) capable of driving the cooling water trough (2) to move upward and downward is provided on the frame (3).

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