Injection molding equipment for infusion apparatus production

Abstract

The invention provides injection molding equipment for infusion apparatus production, and relates to the technical field of infusion apparatus injection molding, the injection molding equipment comprises an extruder and a cooling water tank, a partition plate is installed in the cooling water tank, the cooling water tank is divided into a first water tank and a second water tank by the partition plate, overflow ports are formed in the two ends of the cooling water tank and the partition plate, and transition pieces are installed at the overflow ports; an overflow groove is formed in the transition piece, a rotating cover is rotationally connected to the transition piece, a baffle is arranged on the rotating cover, and the baffle can block the upper portion of the overflow groove and is provided with a first overflow hole; an upper guide wheel and a lower guide wheel are rotationally installed in the first water tank, a conveying channel allowing an infusion tube to pass through is reserved between the upper guide wheel and the lower guide wheel, and the infusion tube can pass through the conveying channel in a horizontal state after passing through the first overflow hole. The liquid conveying pipe is located in a conveying channel in the first overflow hole and the first water tank and can be kept in a horizontal state, and the situation that the thickness of the pipe wall is not uniform due to the fact that the liquid conveying pipe inclines is reduced advantageously.

Description

Technical Field

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

[0002] Infusion sets are mainly used for intravenous infusion, and generally include intravenous needles, needle caps, infusion tubes, drip chambers, etc. Among them, most traditional infusion tubes are formed by extrusion in an injection molding device. Plastic particles are added to the injection molding device, and the plastic particles are pushed forward by the rotation of a screw. At the same time, the plastic particles are heated to a molten state in a heating zone, so that the infusion tube is extruded and formed through a mold. The extruded infusion tube is still in a high-temperature molten state and needs to be immediately cooled in a cooling water tank or a cooling device to quickly solidify.

[0003] For example, the patent document with the publication number CN112277277B discloses a catheter manufacturing device and an infusion set production process using this device. A catheter forming device for forming the material into a catheter is installed at the outlet of the extruder of the catheter manufacturing device. Along the moving direction of the catheter, a catheter cooling and driving device for driving and cooling the catheter and a catheter cutting device for cutting the catheter to a fixed length are installed behind the catheter forming device. Among them, the catheter cooling and driving device includes a cooling water tank. Water inlets are opened at both ends of the cooling water tank. End guide wheels are rotatably connected at the water inlets. Cooling guide wheels can be installed in the cooling water tank. The catheter is transmitted into the cooling water tank by fitting over the upper part of the end guide wheels and is transmitted from the lower part of the cooling guide wheels.

[0004] During the cooling process of the extruded infusion tube by the above-mentioned catheter manufacturing device, the catheter enters the cooling water tank from the water inlet. In order to make the infusion tube fully immersed in the cooling water tank, the cooling guide wheels are used to press the infusion tube downward. However, this will cause the section of the infusion tube from the water inlet to the cooling guide wheels to be in an inclined state. And the extruded infusion tube has a large plastic deformation ability before cooling and forming. 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, thus affecting the forming quality of the infusion tube. Summary of the Invention

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

[0006] To solve the above technical problems, the present invention provides an injection molding device for the production of infusion sets, which includes an extruder and a cooling water tank arranged at the output end of the extruder. A partition is installed in the cooling water tank, and the partition divides the cooling water tank into a water tank one near the extruder end and a water tank two far from the extruder end. Overflow ports are opened at both ends of the cooling water tank and on the partition. A transition piece is installed at the overflow port near the extruder end. An overflow groove communicating with the overflow port is opened on the transition piece. A rotating cover is rotatably connected to the transition piece. A baffle is provided on the rotating cover, and the baffle can block the upper part of the overflow groove and leave an overflow hole one through which the infusion tube and cooling water can pass. An upper guide wheel and a lower guide wheel are rotatably installed in the water tank one. A conveying channel through which the infusion tube can pass is left between the upper guide wheel and the lower guide wheel. After passing through the overflow hole one, the infusion tube can pass through the conveying channel in a horizontal state.

[0007] By adopting the above technical solution, rotate the rotating cover by 180°, so that the rotating cover is at the lower end of the transition piece. The baffle on the rotating cover releases the blockage of the upper part of the overflow groove, and the upper end of the overflow groove is opened, facilitating the extrusion of the infusion tube to be sequentially sent into the overflow groove, the overflow port near the extruder end, and then into the conveying channel between the upper guide wheel and the lower guide wheel. Then rotate the rotating cover by 180° again, and the baffle blocks the upper part of the overflow groove, and the infusion tube is in the overflow hole one. At this time, the infusion tube is located in the overflow hole one and the conveying channel and can maintain a horizontal state, which is beneficial to reducing the occurrence of uneven wall thickness of the infusion tube caused by the inclination of the infusion tube. The infusion tube reaches the water tank two through the overflow port on the partition after passing through the conveying channel. As the cooling water levels in the water tank one and the water tank two rise, the liquid level is higher than the overflow hole one, enabling the infusion tube to be completely immersed in the cooling water in the water tank one, and the cooling water cools the infusion tube in the water tank one.

[0008] Preferably, a diversion hole communicating with the overflow port is opened on the baffle. A diversion tube is installed at the diversion hole. A diversion port is opened below the diversion tube. An adjusting plate that can open or block the diversion port is slidably arranged in the diversion tube. A return spring is connected between the adjusting plate and the diversion tube.

[0009] By adopting the above technical solution, when the water supply pressure in the water tank one fluctuates, the water flow velocity at the overflow port position changes. The change in the overflow port flow velocity may cause the water flow in the water tank one to change from laminar flow to turbulent flow, and the turbulent flow will cause uneven cooling of the infusion tube surface. When the water pressure at the overflow port increases, the cooling water can flow into the diversion tube from the diversion hole and push the adjusting plate to move, opening the diversion port. The cooling water in the diversion tube flows out from the diversion port, reducing the probability of turbulent flow at the overflow hole one.

[0010] Preferably, flow dividing plates are installed on both sides of the flow dividing pipe. An arc-shaped groove is formed in the lower part of the baffle plate. An arc-shaped plate is installed at the arc-shaped groove. The arc-shaped plate is located between the two flow dividing plates. Flow dividing channels are left between the two flow dividing plates and the arc-shaped plate. The flow dividing channels are communicated with the flow dividing openings.

[0011] By adopting the above technical solution, the cooling water flowing out from the flow dividing openings respectively enters the two flow dividing channels and flows downward through the flow dividing channels, cooling the ambient temperature of the front-end infusion pipe. At the same time, it is beneficial to purify the air of the front-end infusion pipe, and can play a certain protective role for the front-end infusion pipe.

[0012] Preferably, a limiting strip is installed on one side of the transition piece where the first overflow hole is located. Card slots matching the limiting strip are formed on both sides of the lower end of the baffle plate at the arc-shaped groove.

[0013] By adopting the above technical solution, the limiting strip and the card slot cooperate to limit the rotation angle of the baffle plate following the rotating cover.

[0014] Preferably, limiting grooves are formed at the upper ends of the rotating cover and the baffle plate. A cover plate is hinged to the upper end of the first water tank. A limiting block capable of cooperating with the limiting groove is connected to one end of the cover plate close to the rotating cover.

[0015] By adopting the above technical solution, after the infusion pipe is sent into the first water tank, the rotating cover is rotated to close the upper end of the overflow groove. When the rotating cover rotates in place, that is, the card slot contacts the limiting strip and the limiting groove is located directly above, the cover plate is covered, and the limiting block is located in the limiting groove, which can limit the rotating cover.

[0016] Preferably, flow blocking plates are provided at both ends of the cover plate. The flow blocking plates can block the upper part of the overflow opening and leave an overflow hole two through which the infusion pipe and the cooling water can pass.

[0017] By adopting the above technical solution, the flow blocking plates can block the upper parts of the overflow openings at both ends of the first water tank, which is beneficial to keep the liquid level of the first water tank horizontal, thereby facilitating uniform cooling of the infusion pipe.

[0018] Preferably, the transition piece is cylindrical. Dovetail blocks are provided on the peripheral side of the transition piece. Dovetail grooves matching the dovetail blocks are formed on the rotating cover.

[0019] By adopting the above technical solution, the dovetail groove on the rotary cover can be slidably mated with the dovetail block on the transition piece, enabling the rotary cover to rotate along the circumferential side of the transition piece, thereby realizing the opening or blocking of the baffle on the rotary cover to the overflow groove. The transition piece is designed as a hollow structure, and the cooling water in the first water tank can enter the interior of the transition piece through the overflow port. Since the volume of the transition piece is smaller than that of the first water tank, and the extruded infusion tube will first enter the transition piece through the first overflow hole and then enter the first water tank, the temperature of the cooling water in the transition piece will be higher than that in the first water tank. The extruded infusion tube is still in a high-temperature molten state when it just separates from the mold and requires a short air cooling section for preliminary cooling and shaping. If it directly enters the first water tank, rapid cooling may cause uneven material shrinkage, surface deformation or internal stress generation, affecting the physical properties and appearance quality of the infusion tube. The infusion tube of the present invention is first preliminarily cooled in the transition piece and then cooled again in the first water tank, which is beneficial to reducing the impact of temperature drop on the quality of the infusion tube.

[0020] Preferably, water storage tanks are provided at both ends of the cooling water tank. The lower part of the water storage tank is provided with a water outlet, and the lower parts of the first water tank and the second water tank are both provided with water inlets. The water inlets and the water outlet are connected by pipelines.

[0021] 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 first water tank and the second water tank through the pipeline, realizing the circulating flow of the cooling water.

[0022] Preferably, a plurality of lower guide wheels are also installed in the second water tank.

[0023] By adopting the above technical solution, the lower guide wheels support the infusion tube, which is beneficial to keeping the infusion tube in a horizontal state in the second water tank.

[0024] Preferably, a frame is provided below the cooling water tank, and a lead screw lifter capable of driving the cooling water tank to rise and fall is provided on the frame.

[0025] By adopting the above technical solution, the lead screw lifter can drive the cooling water tank to rise and fall, facilitating the adjustment of the height of the cooling water tank to match the height of the output end of the extruder, so that the extruded infusion tube from the extruder can pass through the first overflow hole in a horizontal state and enter the first water tank to continue to maintain a horizontal state, which is beneficial to reducing the occurrence of uneven wall thickness caused by the inclination of the infusion tube.

[0026] The beneficial effects of the above technical solutions of the present invention are as follows: 1. The rotating part of the present invention can rotate on the transition part to control the opening and closing above the overflow groove on the transition part. When the upper part of the overflow groove is open, it is convenient to send the extruded infusion solution into the first water tank; when the upper part of the overflow groove is closed, it is convenient to place the infusion tube in the first overflow hole. The infusion tube is located in the conveying channels in the first overflow hole and the first water tank and can maintain a horizontal state, which is beneficial to reducing the occurrence of uneven wall thickness of the infusion tube caused by the inclination of the infusion tube.

[0027] 2. The present invention is provided with a shunt tube at the overflow port. When the water pressure at the overflow port increases, the cooling water can flow into the shunt tube from the shunt holes, and push the regulating plate to move, so that the shunt port is opened. The cooling water in the shunt tube flows out from the shunt port, reducing the probability of turbulence at the first overflow hole, which is beneficial to the uniform cooling of the infusion tube.

[0028] 3. The cooling water flowing out from the shunt port enters two shunt channels respectively and flows down through the shunt channels to cool the ambient temperature of the front-end infusion tube. At the same time, it is beneficial to purify the air of the front-end infusion tube, and can play a certain protective role for the front-end infusion tube.

[0029] 4. The transition part is cylindrical. The cooling water in the first water tank can enter the inside of the transition part through the overflow port. The extruded infusion tube is first preliminarily cooled in the transition part and then cooled again in the first water tank, which is beneficial to reducing the influence of sudden temperature drop on the quality of the infusion tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the injection molding equipment for the production of the infusion set of the present invention; Figure 2 is a side view of the cooling water tank of the present invention; Figure 3 is a cross-sectional view of the cooling water tank of the present invention; Figure 4 is a partial structural schematic diagram of the first water tank of the present invention; Figure 5 is a side view of the first water tank of the present invention with the shunt tube removed; Figure 6 is Figure 2 a cross-sectional view taken along the line A-A of the first water tank in Figure 7 is a cross-sectional view of the rotating cover and the transition part of the present invention; Figure 8 is a side view of the shunt tube of the present invention; Figure 9 is Figure 8 a cross-sectional view taken along the line B-B of the shunt tube in

[0031] In the figure: 1. Extruder; 2. Cooling water tank; 21. First water tank; 22. Second water tank; 23. Partition board; 231. Overflow port; 232. Second overflow hole; 24. Cover plate; 241. Limit block; 242. Baffle plate; 25. Upper guide wheel; 26. Lower guide wheel; 27. Water inlet; 3. Frame; 31. Screw jack; 4. Transition piece; 41. Overflow tank; 411. First overflow hole; 412. Dovetail block; 42. Limit strip; 5. Rotary cover; 51. Dovetail groove; 52. Baffle; 521. Arc groove; 522. Shunt hole; 53. Limit groove; 6. Water storage tank; 61. Water outlet; 7. Shunt pipe; 71. Shunt port; 72. Adjusting plate; 73. Adjusting rod; 74. Return spring; 75. Shunt plate; 76. Arc plate; 77. Shunt channel; 78. Connecting pipe. Specific embodiments

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the Figures 1-9 of the embodiments of the present invention.

[0033] Embodiment This embodiment provides an injection molding device for the production of infusion sets. As Figure 1 shown, it includes an extruder 1 and a cooling water tank 2.

[0034] As Figure 1 and Figure 3 shown, the cooling water tank 2 is arranged at the output end of the extruder 1. A partition board 23 is installed in the cooling water tank 2, and the partition board 23 divides the cooling water tank 2 into a first water tank 21 and a second water tank 22. The end close to the extruder 1 is the first water tank 21, and the end far from the extruder 1 is the second water tank 22.

[0035] As Figure 1 and Figure 3 shown, the infusion tube extruded from the extruder 1 successively passes through the first water tank 21 and the second water tank 22, and cooling water capable of cooling the infusion tube is stored in the first water tank 21 and the second water tank 22.

[0036] As Figure 1 and Figure 6 shown, overflow ports 231 are opened at both ends of the cooling water tank 2 and on the partition board 23. The lower part of the overflow port 231 is arc-shaped. The overflow port 231 can make the cooling water in the cooling water tank 2 flow, and at the same time, it can also enable the extruded infusion tube to pass through.

[0037] As Figure 2 shown, a frame 3 is arranged below the cooling water tank 2, and a screw jack 31 capable of driving the cooling water tank 2 to lift is arranged on the frame 3. The screw jack 31 in this embodiment is a commonly used manual screw jack 31 on the market, and it can also be designed as an electric screw jack 31.

[0038] As Figure 2 shown, the lead screw lift 31 can drive the cooling water tank 2 to lift, facilitating the adjustment of the height of the cooling water tank 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 conducive to reducing the occurrence of uneven wall thickness caused by the inclination of the infusion tube.

[0039] As Figure 4 and Figure 7 shown, a cylindrical transition piece 4 is installed at the overflow port 231 at one end of the water tank 21 close to the extruder 1, and the axis of the transition piece 4 is parallel to the conveying direction of the conveying pipe.

[0040] As Figure 4 and Figure 7 shown, an overflow groove 41 communicating with the overflow port 231 is opened downward above the transition piece 4, and the lower part of the overflow groove 41 is also arc-shaped, and the size of the overflow groove 41 is the same as that of the overflow port 231.

[0041] As Figure 4 and Figure 7 shown, the cooling water in the water tank 21 can enter the inside of the transition piece 4 through the overflow port 231. Since the volume of the transition piece 4 is smaller than the volume of the water tank 21, and the extruded infusion tube will first pass through the transition piece 4 and then enter the water tank 21, the temperature of the cooling water in the transition piece 4 will be higher than the temperature of the cooling water in the water tank 21. The infusion tube is first preliminarily cooled in the transition piece 4 and then cooled again in the water tank 21, which is conducive to reducing the impact of sudden temperature drop on the quality of the infusion tube.

[0042] As Figure 4 shown, a dovetail block 412 is provided on the circumferential side of the transition piece 4, that is, the dovetail block 412 surrounds the circumferential side of the transition piece 4, and the cross-section of the dovetail block 412 is dovetail-shaped along the circumferential direction of the transition piece 4.

[0043] As Figure 4 shown, a rotating cover 5 is rotatably connected to the transition piece 4. A dovetail groove 51 matching the dovetail block 412 is provided on the inner wall of the rotating cover 5, and the rotating cover 5 can rotate along the circumferential side of the transition piece 4. One end of the rotating cover 5 away from the water tank 21 is connected with a baffle 52. The plate surface of the baffle 52 is perpendicular to the axis of the transition piece 4, and an arc-shaped groove 521 is opened at the lower end of the baffle 52. When the rotating cover 5 rotates above the transition piece 4, the baffle 52 can block the upper part of the overflow groove 41, so that an overflow hole 411 for the infusion tube and the cooling water to pass through is left between the arc-shaped groove 521 of the baffle 52 and the lower part of the overflow groove 41.

[0044] As Figure 4 and Figure 5As shown, a limiting strip 42 is installed at the middle part of the transition piece 4 and on one side of the first overflow hole 411. At both sides of the lower end of the baffle plate 52 located in the arc-shaped groove 521, clamping grooves (not marked in the figure) matching the limiting strip 42 are provided.

[0045] As Figure 5 and Figure 7 shown, the limiting strip 42 cooperates with the clamping groove to limit the rotation angle of the baffle plate 52 following the rotation of the rotary cover 5. When the rotary cover 5 rotates to the lower part of the transition piece 4, the clamping groove on one side of the baffle plate 52 abuts against the limiting strip 42, and the baffle plate 52 releases the blockage of the upper part of the overflow groove 41, so that the upper end of the overflow groove 41 is opened, facilitating the extrusion of the infusion tube to be successively sent into the overflow groove 41, the overflow port 231 at one end close to the extruder 1, and then sent into the first water tank 21.

[0046] As Figure 5 shown, when the rotary cover 5 rotates to the upper part of the transition piece 4, the clamping groove on the other side of the baffle plate 52 abuts against the limiting strip 42, and the baffle plate 52 blocks the upper part of the overflow groove 41, and the infusion tube is in the first overflow hole 411. As the water level in the first water tank 21 rises and the water level is higher than the first overflow hole 411, it is beneficial for the infusion tube to be completely immersed in the cooling water in the first water tank 21, thereby facilitating improving the uniformity of the cooling of the infusion tube by the cooling water.

[0047] As Figure 4 shown, limiting grooves 53 are provided at the upper ends of both the rotary cover 5 and the baffle plate 52. A cover plate 24 is hinged at the upper end of the first water tank 21, and a limiting block 241 that can cooperate with the limiting groove 53 is connected to one end of the cover plate 24 close to the rotary cover 5.

[0048] As Figure 4 and Figure 5 shown, after the infusion tube is sent into the first water tank 21, the rotary cover 5 is rotated to close the upper end of the overflow groove 41. When the rotary cover 5 rotates in place, that is, the clamping groove contacts the limiting strip 42 and the limiting groove 53 is located directly above, the cover plate 24 is covered, and the limiting block 241 is located in the limiting groove 53, which can limit the rotary cover 5.

[0049] As Figure 6 and Figure 7 shown, flow baffle plates 242 are provided at both ends of the cover plate 24, and the plate surfaces of the flow baffle plates 242 are parallel to the plate surface of the baffle plate 52. The flow baffle plates 242 can block the upper parts of the overflow ports 231 at both ends of the first water tank 21 and leave second overflow holes 232 that can allow the infusion tube and the cooling water to pass through. The size of the second overflow holes 232 is the same as the size of the first overflow holes 411.

[0050] As Figure 6 and Figure 7The shown baffle plate 242 can block the upper parts of the overflow ports 231 at both ends of the first water tank 21, which is beneficial to keep the liquid level in the first water tank 21 horizontal, thus facilitating the uniform cooling of the infusion tube.

[0051] As Figure 3 shown, an upper guide wheel 25 and a lower guide wheel 26 are rotatably installed in the first water tank 21. Among them, the upper guide wheel 25 is rotatably installed at the lower part of the cover plate 24, the lower guide wheel 26 is rotatably installed at the bottom of the first water tank 21, a plurality of upper guide wheels 25 and lower guide wheels 26 are provided, and they are arranged at intervals. The axial directions of the upper guide wheel 25 and the lower guide wheel 26 are parallel and perpendicular to the conveying direction of the infusion tube.

[0052] As Figure 3 and Figure 4 shown, a conveying channel through which the infusion tube can pass is left between the upper guide wheel 25 and the lower guide wheel 26. The height of the conveying channel matches the height of the first overflow hole 411, so that after the infusion tube passes through the first overflow hole 411, it can pass through the conveying channel in a horizontal state, which is beneficial to reduce the occurrence of uneven wall thickness of the infusion tube caused by inclination.

[0053] As Figure 3 shown, a plurality of lower guide wheels 26 are also installed at intervals in the second water tank 22. The lower guide wheels 26 support the infusion tube, which is beneficial to keep the infusion tube horizontal in the second water tank 22.

[0054] As Figure 2 and Figure 3 shown, water storage tanks 6 are provided at both ends of the cooling water tank 2. 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 the first water tank 21 and the second water tank 22, and the water inlets 27 and the water outlet 61 are connected by a pipeline (not marked in the figure).

[0055] As Figure 1 and Figure 2 shown, the cooling water overflowing from the overflow ports 231 at both ends of the cooling water tank 2 flows into the water storage tanks 6, and then enters the first water tank 21 and the second water tank 22 through the pipeline, realizing the circulating flow of the cooling water.

[0056] As Figure 5 shown, a diversion hole 522 communicating with the overflow port 231 is formed on the baffle plate 52, and the diversion hole 522 is located above the first overflow hole 411. As Figure 4 shown, a diversion pipe 7 is installed at the diversion hole 522, and the axial direction of the diversion pipe 7 is parallel to the axial direction of the transition piece 4. As Figure 9As shown, a diversion port 71 is provided below the diversion pipe 7, and an adjustment plate 72 capable of opening or blocking the diversion port 71 is slidably provided in the diversion pipe 7. One end of the diversion pipe 7 far from the diversion hole 522 is sealed, and one end of the adjustment plate 72 far from the diversion hole 522 is connected with an adjustment rod 73. A connecting pipe 78 is fixedly installed in the diversion pipe 7, and the adjustment rod 73 is slidably connected in the connecting pipe 78. A return spring 74 is sleeved on the connecting pipe 78, and both ends of the return spring 74 are respectively connected with the connecting pipe 78 and the adjustment plate 72.

[0057] As Figure 4 , Figure 8 and Figure 9 shown, diversion plates 75 are installed on both sides of the lower part of the diversion pipe 7, and both diversion plates 75 incline downward. An arc plate 76 is installed at the arc-shaped groove 521 on the baffle 52, the arc plate 76 is located between the two diversion plates 75, and the end of the arc plate 76 is connected with the two diversion plates 75. Diversion channels 77 are left between the two diversion plates 75 and the arc plate 76, and the diversion channels 77 communicate with the diversion port 71.

[0058] As Figure 5 and Figure 9 shown, when the water pressure at the overflow port 231 at one end of the water tank one 21 close to the extruder 1 increases, the cooling water in the water tank one 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 is opened, and the cooling water in the diversion pipe 7 flows out from the diversion port 71, reducing the probability of turbulence at the overflow hole one 411, which is beneficial to the uniform cooling of the infusion tube. When the water pressure at the overflow port 231 at one end of the water tank one 21 close to the extruder 1 decreases, under the action of the elastic force of the return spring 74, the adjustment plate 72 resets and blocks the diversion port 71.

[0059] As Figure 8 and Figure 9 shown, the cooling water flowing out from the diversion port 71 respectively enters the two diversion channels 77 and flows down through the diversion channels 77. Since the front infusion tube is located below the arc 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 infusion tube, and at the same time is beneficial to purifying the air of the front infusion tube, and can play a certain protective role for the front infusion tube.

[0060] The implementation principle of the injection molding equipment for the production of the infusion set in this embodiment: Open the cover plate 24, rotate the rotary cover 5 by 180°, so that the rotary cover 5 is at the lower end of the transition piece 4, and the baffle 52 on the rotary cover 5 releases the block on the upper part of the overflow tank 41, so that the upper end of the overflow tank 41 is opened. After the extruded infusion tube is sent into the overflow tank 41 and the overflow port 231 near one end of the extruder 1 in sequence, it is continuously sent into the conveying channel between the upper guide wheel 25 and the lower guide wheel 26, and the infusion tube reaches the water tank two 22 after passing through the conveying channel.

[0061] Rotate the rotary cover 5 reversely by 180°, the baffle 52 blocks the upper part of the overflow tank 41, and the infusion tube is in the overflow hole one 411. Cover the cover plate 24, and the limit block 241 is located in the limit groove 53, which can limit the rotary cover 5.

[0062] Inject cooling water into the water tank one 21 and the water tank two 22. As the liquid level of the cooling water in the water tank one 21 and the water tank two 22 rises, the liquid level is higher than the overflow hole one 411, so that the infusion tube can be completely immersed in the cooling water in the water tank one 21, and the cooling water cools the infusion tube in the water tank one 21. The cooling water can flow out from the overflow hole one 411 and flow into the storage tank 6 from the overflow ports 231 at both ends of the cooling water tank 2, and then enter the water tank one 21 and the water tank two 22 through the pipeline, realizing the circulating flow of the cooling water.

[0063] When the water pressure at the overflow port 231 near one end of the extruder 1 in the water tank one 21 increases, the cooling water in the water tank one 21 can flow into the shunt tube 7 from the shunt hole 522 and push the regulating plate 72 to move, so that the shunt port 71 is opened. After the cooling water in the shunt tube 7 flows out from the shunt port 71, it enters the two shunt channels 77 respectively and flows downward through the shunt channels 77.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components.

Claims

1. An injection molding device for the production of infusion sets, comprising an extruder (1) and a cooling water tank (2) arranged at the output end of the extruder (1), characterized in that: A partition plate (23) is installed in the cooling water tank (2). The partition plate (23) divides the cooling water tank (2) into a first water tank (21) near one end of the extruder (1) and a second water tank (22) far from one end of the extruder (1). Overflow ports (231) are opened at both ends of the cooling water tank (2) and on the partition plate (23). A transition piece (4) is installed at the overflow port (231) near one end of the extruder (1). An overflow groove (41) communicating with the overflow port (231) is opened on the transition piece (4). A rotating cover (5) is rotatably connected to the transition piece (4). A baffle (52) is provided on the rotating cover (5). The baffle (52) can block the upper part of the overflow groove (41) and leave an overflow hole one (411) through which the infusion tube and cooling water can pass. An upper guide wheel (25) and a lower guide wheel (26) are rotatably installed in the first water tank (21). A conveying channel through which the infusion tube can pass is left between the upper guide wheel (25) and the lower guide wheel (26). After passing through the overflow hole one (411), the infusion tube can pass through the conveying channel in a horizontal state.

2. The injection molding equipment for the production of infusion sets according to claim 1, characterized in that: A diversion hole (522) communicating with the overflow port (231) is opened on the baffle (52). A diversion tube (7) is installed at the diversion hole (522). A diversion port (71) is opened below the diversion tube (7). An adjusting plate (72) capable of opening or blocking the diversion port (71) is slidably arranged in the diversion tube (7). A return spring (74) is connected between the adjusting plate (72) and the diversion tube (7).

3. The injection molding device for the production of infusion sets according to claim 2, wherein: Diversion plates (75) are installed on both sides of the diversion tube (7). An arc-shaped groove (521) is opened at the lower part of the baffle (52). An arc-shaped plate (76) is installed at the arc-shaped groove (521). The arc-shaped plate (76) is located between the two diversion plates (75). Diversion channels (77) are left between the two diversion plates (75) and the arc-shaped plate (76). The diversion channels (77) communicate with the diversion port (71).

4. The injection molding equipment for the production of infusion sets according to claim 3, characterized in that: A limiting strip (42) is installed on the transition piece (4) on one side of the overflow hole one (411). Card slots matching the limiting strip (42) are opened at both sides of the lower end of the baffle (52) located at the arc-shaped groove (521).

5. The injection molding device for the production of infusion sets according to claim 4, wherein: Limiting grooves (53) are opened at the upper ends of the rotating cover (5) and the baffle (52). A cover plate (24) is hinged at the upper end of the first water tank (21). A limiting block (241) capable of cooperating with the limiting groove (53) is connected to one end of the cover plate (24) close to the rotating cover (5).

6. The injection molding device for producing infusion sets according to claim 5, wherein: Flow baffle plates (242) are provided at both ends of the cover plate (24). The flow baffle plates (242) can block the upper part of the overflow port (231) and leave an overflow hole two (232) through which the infusion tube and cooling water can pass.

7. The injection molding device for the production of infusion sets according to claim 6, characterized in that: The transition piece (4) is cylindrical. A dovetail block (412) is provided on the peripheral side of the transition piece (4). A dovetail groove (51) matching the dovetail block (412) is opened on the rotating cover (5).

8. The injection molding device for the production of infusion sets according to claim 7, characterized in that: Water storage tanks (6) are provided at both ends of the cooling water tank (2). 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 the first water tank (21) and the second water tank (22). The water inlets (27) and the water outlet (61) are connected by pipes.

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

10. The injection molding device for the production of infusion sets according to claim 9, characterized in that: Below the cooling water tank (2), there is a frame (3). A lead screw lift (31) capable of driving the cooling water tank (2) to lift and lower is provided on the frame (3).

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