Plastic pipe joint welding machine

Abstract

The application relates to the technical field of medical instrument production, and discloses a plastic pipe joint welding machine which comprises a top plate, a semi-mold closing mechanism, a plastic guide pipe, an injection molding mechanism and a demolding mechanism. The lower side of the top plate is provided with two semi-mold closing mechanisms. The semi-mold closing mechanism comprises a mold closing plate, and a plurality of mold grooves are formed in the surface of the mold closing plate. The plastic pipe joint welding machine positions the plastic guide pipe by sleeving the welding end of the plastic guide pipe on a guide pipe positioning column. A first motor drives the rotation shaft to rotate, so that the two mold closing plates are moved to be close to each other and realize mold closing. At this time, the two corresponding mold grooves are combined into a complete mold cavity. The injection molding mechanism quantitatively and equally delivers the molten injection plastic to each corresponding mold groove. The molten injection plastic tightly fills the area between the mold cavity formed by the two corresponding mold grooves and the outer wall of the plastic guide pipe welding end and the fixed mold closing column, so that the plastic guide pipe is directly injection molded and welded with the joint.

Description

Technical Field

[0001] This invention relates to the field of medical device manufacturing technology, specifically to a plastic pipe fitting welding machine. Background Technology

[0002] Medical catheters are widely used in the medical field. To meet different medical needs, it is often necessary to attach a connector to the end of a plastic catheter and then attach other catheters to the other end of the connector.

[0003] Existing methods for connecting catheters and fittings mainly include adhesive bonding, mechanical fastener bonding, and fusion bonding (welding). Welding, in particular, involves joining the catheter and fitting together after they have been separately molded, resulting in a long production cycle and high costs. Directly connecting the catheter and fitting during the injection molding process would simplify the connection and reduce costs. However, current catheter fitting welding technology is immature, difficult to demold, and struggles to achieve a tight weld during injection molding. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a plastic pipe joint welding machine, which has the advantages of tightly welding conduits and joints and easy demolding, thus solving the problems of poor welding effect and poor demolding effect of conduits and joints in existing technologies.

[0005] To address the aforementioned technical problems of poor welding and demolding effects in existing conduits and connectors, this invention provides the following technical solution: A plastic pipe joint welding machine includes a top plate, a semi-closed mold mechanism, a plastic conduit, an injection molding mechanism, and a demolding mechanism. Two semi-closed mold mechanisms are provided on the lower side of the top plate. Each semi-closed mold mechanism includes a mold plate. The surface of the mold plate has a plurality of mold grooves. The lower end and upper end of the mold grooves have lower openings and upper openings, respectively. When the two semi-closed mold mechanisms are fitted together, the welding end of the plastic conduit passes through the lower opening and extends into the interior of the mold groove. The top plate is provided with several fixed mold-closing pillars, and each fixed mold-closing pillar is provided with a guide tube positioning pillar at its lower end. When two of the semi-mold-closing mechanisms are in contact, the guide tube positioning pillar is sleeved on the welding end of the plastic guide tube to support and position the plastic guide tube. One of the semi-mold-closing mechanisms has an injection hole on its mold plate, which is used by the injection molding mechanism to inject molten plastic into the mold groove to complete the injection molding of the joint of the welding end of the plastic guide tube. The demolding mechanism is used to demold the plastic conduit with joint formed by injection molding from the semi-molding mechanism.

[0006] Preferably, the lower surface of the top plate is provided with limit rails at both ends, and a rotating shaft is provided between the limit rails. The rotating shaft has threaded grooves with opposite helical directions on both sides of its surface. A motor bracket is fixedly installed on one side of the top plate, and a first motor is provided on the motor bracket. The first motor is fixedly connected to one end of the rotating shaft. Each of the two mold plates has an upper support plate on one side. Each upper support plate has a slider on its upper surface. The slider is screwed into the corresponding threaded groove and slides against the inner wall of the limiting track.

[0007] Preferably, the demolding mechanism includes a connecting plate, an annular demolding pressure plate, and a connecting rod. The connecting plate and the annular demolding pressure plate are respectively disposed on the upper and lower sides of the top plate. The connecting rod slides through the top plate, and both ends of the connecting rod are fixedly connected to the connecting plate and the annular demolding pressure plate, respectively. The annular demolding pressure plate is sleeved on the outside of the fixed mold closing column and slides with the fixed mold closing column. A slot for avoiding the injection head is opened on one side of the annular demolding pressure plate. When the annular demolding pressure plate is in the mold closing position, the slot corresponds to the position of the injection hole.

[0008] Preferably, connecting blocks are respectively provided on both sides of the connecting plate, and a lifting drive assembly is provided on the connecting block. The lifting drive assembly includes a screw, a second motor, and a guide rod. The second motor is used to drive the screw to rotate. The screw is screwed to one of the connecting blocks, and the guide rod is slidably assembled on the other connecting block. A first support column is fixedly installed on the upper surface of the top plate, and a support plate is provided on the top of the first support column. The screw is rotatably assembled between the lower surface of the support plate and the upper surface of the top plate, and the guide rod is fixedly installed between the lower surface of the support plate and the upper surface of the top plate.

[0009] Preferably, the injection molding mechanism includes a branch pipe, a main pipe, an injection molding box, and a connecting hose. One end of the branch pipe, which is equipped with an injection head, passes through the empty groove and the injection hole in sequence and communicates with the inside of the mold groove. The other end of the branch pipe is connected to the output end of the main pipe. The injection molding box is disposed on the top plate, and the outlet of the injection molding box and the input end of the main pipe are connected by the connecting hose.

[0010] Preferably, a second support column is fixedly installed on the lower surface of the upper support plate, a lower support plate is provided at the bottom end of the second support column, and a cooling mechanism is provided on the lower support plate; The cooling mechanism includes a water tank, a condenser, and water pipes. The condenser is used to cool the liquid inside the water tank. Both ends of the water pipes lead into the water tank, and a circulation pump is installed on the water pipes. The mold plate has a first cavity inside, and the water pipe is a flexible hose, with its middle part set in the first cavity and the water pipe coiled around the back side of the mold groove.

[0011] Preferably, the top plate has a plurality of mounting holes, the fixed mold clamping column is fixedly sleeved on the mounting holes, the fixed mold clamping column has a second cavity inside, the upper end face of the fixed mold clamping column has a water pipe inlet and outlet, the top plate is also provided with a cooling mechanism, the water pipe of the cooling mechanism enters the second cavity through the water pipe inlet and outlet and is coiled in the second cavity.

[0012] Preferably, a bottom plate is provided at the lower end of the top plate, and a third support column is fixedly connected between the top plate and the bottom plate. Limiting grooves are respectively formed on the surface of the third support column. A storage box is provided on the upper surface of the bottom plate. A handle is provided on the front side of the storage box. Guide rails are respectively provided on both sides of the outside of the storage box. The guide rails slide with the limiting grooves respectively.

[0013] Preferably, T-shaped sliders are provided at both ends of the upper surface of the mold plate, and T-shaped tracks are provided on both sides of the lower surface of the top plate, with the T-shaped sliders slidingly engaging with the T-shaped tracks.

[0014] The present invention has the following beneficial effects: 1. This plastic pipe fitting welding machine positions the plastic conduit by placing the welding end of the plastic conduit onto the conduit positioning post. The first motor drives the rotating shaft to rotate, causing the two mold plates to move to contact and merge, thus achieving mold closing. At this time, the two corresponding mold grooves are combined into a complete mold cavity. The injection molding mechanism delivers molten plastic quantitatively and equally into each corresponding mold groove. The molten plastic tightly fills the area between the mold cavity formed by the two corresponding mold grooves, the fixed mold closing post, and the outer wall of the plastic conduit welding end, achieving the purpose of direct injection molding welding of the plastic conduit and the fitting.

[0015] 2. This plastic pipe joint welding machine uses a cooling mechanism to assist in the rapid forming of the joint. The condensate in the water tank circulates in the water pipe under the action of the circulating pump, cooling the first cavity and the second cavity, and cooling the surface of the mold groove and the fixed mold pillar respectively. This allows the joint formed by the injection molding plastic to cool and solidify rapidly. Moreover, the joint formed by injection molding will not stick to the surface of the mold groove and the fixed mold pillar, making demolding convenient.

[0016] 3. This plastic pipe joint welding machine uses a first motor to drive the two mold plates to separate, exposing the plastic conduit with the joint welded and its upper fixed mold column. A second motor drives the screw to rotate, causing the connecting block screwed to the screw to move downward. Under the guidance of the guide rod, the connecting plate moves down vertically, causing the annular demolding plates connected to the lower end of the connecting rod to descend synchronously. The annular demolding plates slide down along the outer wall of the fixed mold column and press down on the plastic conduit with the joint welded, separating it from the fixed mold column and the conduit positioning column, and it falls into the storage box, completing the demolding. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the semi-molding mechanism of the present invention; Figure 3 This is an exploded view of the semi-molding mechanism and rotating shaft of the present invention; Figure 4 This is one of the schematic diagrams of the top plate structure of the present invention; Figure 5 This is a second schematic diagram of the top plate structure of the present invention; Figure 6 This is an exploded view of the demolding mechanism of the present invention; Figure 7 This is a cross-sectional view of some components of the present invention; Figure 8 This is a schematic diagram of the fixed mold-closing column and the guide tube positioning column of the present invention; Figure 9 This is a schematic cross-sectional view of the plastic conduit and connector of the present invention.

[0018] In the diagram: 1. Top plate; 2. Semi-closed mold mechanism; 3. Mold plate; 4. Mold groove; 5. Lower opening; 6. Upper opening; 7. Plastic conduit; 8. Fixed mold closing pillar; 9. Conduit positioning pillar; 10. Injection hole; 11. Demolding mechanism; 12. Limiting rail; 13. Rotating shaft; 14. Threaded groove; 15. Motor bracket; 16. First motor; 17. Upper support plate; 18. Slider; 19. Connecting plate; 20. Annular demolding pressure plate; 21. Connecting rod; 22. Hollow slot; 23. Connecting block; 24. Screw; 25. 26. Second motor; 27. Guide rod; 28. First support column; 29. ​​Support plate; 30. Branch pipe; 31. Main pipe; 32. Injection molding box; 33. Connecting hose; 34. Second support column; 35. Lower support plate; 36. Cooling mechanism; 37. Water tank; 38. Condenser; 39. Water pipe; 40. First cavity; 41. Mounting hole; 42. Water pipe inlet / outlet; 43. Base plate; 44. Third support column; 45. Limiting groove; 46. Storage box; 47. Guide rail; 48. T-shaped slider; 49. T-shaped track. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-9 A plastic pipe joint welding machine includes a top plate 1, a semi-closed mold mechanism 2, a plastic conduit 7, an injection molding mechanism, and a demolding mechanism 11. Two semi-closed mold mechanisms 2 are provided on the lower side of the top plate 1. Each semi-closed mold mechanism 2 includes a mold plate 3. The surface of the mold plate 3 is provided with a plurality of mold grooves 4. The lower end and the upper end of the mold grooves 4 are respectively provided with a lower opening 5 and an upper opening 6. When the two semi-closed mold mechanisms 2 are in contact, the welding end of the plastic conduit 7 passes through the lower opening 5 and extends into the interior of the mold groove 4.

[0021] The top plate 1 is provided with several fixed mold closing pillars 8. Each fixed mold closing pillar 8 is provided with a guide tube positioning pillar 9 at its lower end. When the two semi-mold closing mechanisms 2 are in contact, the guide tube positioning pillar 9 is sleeved on the welding end of the plastic guide tube 7 to support and position the plastic guide tube 7. One of the mold closing plates 3 of the semi-mold closing mechanism 2 is provided with an injection hole 10, which is used by the injection molding mechanism to inject molten plastic into the mold groove 4 to complete the joint injection molding of the welding end of the plastic guide tube 7.

[0022] The demolding mechanism 11 is used to demold the plastic conduit 7 with a joint formed by injection molding from the semi-closed mold mechanism 2.

[0023] Furthermore, limit rails 12 are respectively provided at both ends of the lower surface of the top plate 1, and a rotating shaft 13 is provided between the limit rails 12. Threaded grooves 14 with opposite spiral directions are provided on both sides of the rotating shaft 13. A motor bracket 15 is fixedly installed on one side of the top plate 1, and a first motor 16 is provided on the motor bracket 15. The first motor 16 is fixedly connected to one end of the rotating shaft 13. Upper support plates 17 are respectively provided on one side of the two mold plates 3. Slider blocks 18 are respectively provided on the upper surface of the upper support plates 17. The sliders 18 are respectively screwed to the corresponding threaded grooves 14 and slide in cooperation with the inner wall of the limit rails 12. Thus, the first motor 16 can drive the rotating shaft 13 to rotate, causing the sliders 18 screwed to the threaded grooves 14 to move closer or further away from each other, thereby causing the two mold plates 3 to move closer or further away from each other. When the two mold plates 3 move to contact each other, the two corresponding mold grooves 4 are combined into a complete mold cavity. With the cooperation of the fixed mold column 8 and the guide positioning column 9, a plastic guide 7 with a welded joint is formed by injection molding.

[0024] Furthermore, the demolding mechanism 11 includes a connecting plate 19, an annular demolding pressure plate 20, and a connecting rod 21. The connecting plate 19 and the annular demolding pressure plate 20 are respectively disposed on the upper and lower sides of the top plate 1. The connecting rod 21 slides through the top plate 1, and both ends of the connecting rod 21 are fixedly connected to the connecting plate 19 and the annular demolding pressure plate 20, respectively. The annular demolding pressure plate 20 is sleeved on the outside of the fixed mold clamping column 8 and slides in cooperation with the fixed mold clamping column 8. A slot 22 for avoiding the injection head is opened on one side of the annular demolding pressure plate 20. When the annular demolding pressure plate 20 is in the mold-closed position, the slot 22 corresponds to the position of the injection hole 10. The connecting plate 19 is provided with a slot 22 on both sides. The connecting block 23 is equipped with a lifting drive assembly, which can drive the connecting plate 19 to rise and fall, so that the annular demolding plates 20 connected to the lower end of the connecting rod 21 rise and fall synchronously. When the two mold plates 3 move to touch, the annular demolding plates 20 are located at the upper end of the two mold plates 3. After injection molding is completed and formed, the first motor 16 drives the two mold plates 3 to separate, so that the plastic conduit 7 with the welded joint and the fixed mold clamping column 8 at its upper end are exposed. The annular demolding plates 20 are driven to fall by the lifting drive assembly, which can separate the plastic conduit 7 with the welded joint from the fixed mold clamping column 8 and the conduit positioning column 9, thus completing the demolding.

[0025] The lifting drive assembly includes a screw 24, a second motor 25, and a guide rod 26. The second motor 25 drives the screw 24 to rotate. Belt-mounted pulleys are respectively provided on the upper end of the screw 24 and the output shaft of the second motor 25. A transmission belt is provided between the two belt-mounted pulleys. The second motor 25 drives the corresponding belt-mounted pulley to rotate, which in turn drives the other belt-mounted pulley to rotate, thereby driving the screw 24 to rotate. The screw 24 is screwed onto one of the connecting blocks 23. The guide rod 26 is slidably mounted on the other connecting block 23. A first support column 27 is fixedly installed on the upper surface of the top plate 1. A support plate 28 is provided on the top of the first support column 27. The screw 24 is rotatably mounted between the lower surface of the support plate 28 and the upper surface of the top plate 1. The guide rod 26 is fixedly installed between the lower surface of the support plate 28 and the upper surface of the top plate 1. Thus, the second motor 25 drives the screw 24 to rotate, causing the connecting block 23 screwed onto the screw 24 to move up and down. Under the guidance of the guide rod 26, the connecting plate 19 is driven to rise and fall in the vertical direction.

[0026] Furthermore, the injection molding mechanism includes a branch pipe 29, a main pipe 30, an injection molding box 31, and a connecting hose 32. One end of the branch pipe 29, which is equipped with an injection head, passes through the empty groove 22 and the injection hole 10 in sequence and communicates with the inside of the mold cavity 4. The other end of the branch pipe 29 is connected to the output end of the main pipe 30. A quantitative output pump is provided at the connection between the branch pipe 29 and the main pipe 30. The injection molding box 31 is set on the top plate 1. The outlet of the injection molding box 31 and the input end of the main pipe 30 are connected by the connecting hose 32, so that the injection molding mechanism can quantitatively and equally deliver the molten injection molding material to each corresponding mold cavity 4.

[0027] Furthermore, a second support column 33 is fixedly installed on the lower surface of the upper support plate 17, and a lower support plate 34 is provided at the bottom end of the second support column 33. A cooling mechanism 35 is provided on the lower support plate 34. The cooling mechanism 35 includes a water tank 36, a condenser 37, and a water pipe 38. The condenser 37 is used to cool the liquid inside the water tank 36, which can keep the liquid inside the water tank 36 at the low temperature required for injection molding. Both ends of the water pipe 38 are connected to the inside of the water tank 36, and a circulation pump is provided on the water pipe 38, so that the condensate in the water tank 36 can circulate in the water pipe 38 under the action of the circulation pump.

[0028] The mold plate 3 has a first cavity 39 inside. The water pipe 38 is a flexible hose, with its middle portion located inside the first cavity 39 and coiled around the back side of the mold groove 4. That is, the water pipe 38 is coiled around the side of the mold groove 4 away from the mold cavity. The condensate in the water pipe 38 circulates to cool the back side of the mold groove 4, thereby rapidly cooling and shaping the joint formed by injection molding in the mold cavity formed by the two merged mold grooves 4. The water pipe 38 is a flexible hose, and its length meets the connection requirements when the mold plate 3 is at its maximum opening and closing distance.

[0029] Furthermore, the top plate 1 has several mounting holes 40 on its surface, and the fixed mold clamping column 8 is fixedly sleeved on the mounting holes 40. The fixed mold clamping column 8 has a second cavity inside, and the upper end face of the fixed mold clamping column 8 has a water pipe inlet / outlet 41. The top plate 1 is also provided with a cooling mechanism 35. The water pipe 38 of the cooling mechanism 35 enters the second cavity through the water pipe inlet / outlet 41 and coils inside the second cavity. The condensate in the corresponding water pipe 38 circulates to cool the inside of the second cavity, thereby allowing the injection plastic in contact with the outer wall of the fixed mold clamping column 8 to cool and solidify quickly.

[0030] Furthermore, a bottom plate 42 is provided at the lower end of the top plate 1, and a third support column 43 is fixedly connected between the top plate 1 and the bottom plate 42. Limiting grooves 44 are respectively opened on the surface of the third support column 43. A storage box 45 is provided on the upper surface of the bottom plate 42. The storage box 45 is used to collect the plastic conduit 7 with the joint welded. A handle is provided on the front side of the storage box 45. Guide rails 46 are respectively provided on both sides of the outside of the storage box 45. The guide rails 46 slide with the limiting grooves 44, so that the storage box 45 is easy to install and disassemble.

[0031] Furthermore, T-shaped sliders 47 are respectively provided at both ends of the upper surface of the template 3, and T-shaped tracks 48 are respectively provided on both sides of the lower surface of the top plate 1. The T-shaped sliders 47 and T-shaped tracks 48 slide in cooperation, and the sliding of the template 3 is assisted by the T-shaped sliders 47 and T-shaped tracks 48.

[0032] Working principle: When in use, the welding ends of each plastic conduit 7 are put on the conduit positioning post 9 until the upper end of the plastic conduit 7 contacts the lower end of the fixed mold closing post 8. The first motor 16 is started, which drives the rotating shaft 13 to rotate. The slider 18 drives the two mold closing plates 3 to move closer to each other until the two mold closing plates 3 move to touch and merge. At this time, the two corresponding mold grooves 4 are combined into a complete mold cavity.

[0033] The injection molding mechanism is activated, and molten plastic is output from the connecting hose 32. Under the action of the quantitative output pump, the molten plastic in the injection tank 31 is quantitatively and equally delivered to each corresponding mold cavity 4 through the branch pipe 29 and the injection head at its end. The molten plastic tightly fills the area between the mold cavity formed by the two corresponding mold cavities 4 and the outer wall of the fixed mold clamping column 8 and the weld end of the plastic conduit 7. The condensate in the water tank 36 corresponding to each cooling mechanism 35 circulates in the water pipe 38 under the action of the circulation pump, cooling the first cavity 39 and the second cavity, cooling the surface wall of the mold cavity 4 and the fixed mold clamping column 8 respectively, thereby allowing the joint formed by the injection plastic filling in the mold cavity to cool and solidify rapidly.

[0034] After the joint cools and solidifies, the branch pipe 29 of the injection molding mechanism is first controlled to retract, so that its injection end exits from the injection hole 10 and the slot 22. Then, the first motor 16 is started to drive the two mold plates 3 to separate, exposing the plastic conduit 7 with the joint and its upper fixed mold-closing column 8. The second motor 25 drives the screw 24 to rotate, so that the connecting block 23 screwed to the screw 24 moves downward. Under the guidance of the guide rod 26, the connecting plate 19 moves down in the vertical direction, so that the annular demolding plates 20 connected to the lower end of the connecting rod 21 move down synchronously. The annular demolding plates 20 slide down along the outer wall of the fixed mold-closing column 8 and press down on the plastic conduit 7 with the joint, so that it separates from the fixed mold-closing column 8 and the conduit positioning column 9 and falls into the storage box 45, completing the demolding.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic pipe joint welding machine, comprising a top plate (1), a semi-closed mold mechanism (2), a plastic conduit (7), an injection molding mechanism, and a demolding mechanism (11), characterized in that: Two semi-molding mechanisms (2) are provided on the lower side of the top plate (1). The semi-molding mechanism (2) includes a mold plate (3). The surface of the mold plate (3) is provided with a number of mold grooves (4). The lower end and upper end of the mold groove (4) are respectively provided with a lower opening (5) and an upper opening (6). When the two semi-molding mechanisms (2) are fitted together, the welding end of the plastic conduit (7) passes through the lower opening (5) and extends into the mold groove (4). The top plate (1) is provided with several fixed mold clamping columns (8), and each fixed mold clamping column (8) is provided with a guide positioning column (9) at its lower end. When the two semi-mold clamping mechanisms (2) are in contact, the guide positioning column (9) is sleeved on the welding end of the plastic guide (7) to support and position the plastic guide (7). One of the semi-mold clamping mechanisms (2) has an injection hole (10) on its clamping plate (3) for the injection mechanism to inject molten plastic into the mold groove (4) to complete the joint injection molding of the welding end of the plastic guide (7). The demolding mechanism (11) is used to demold the plastic conduit (7) with a joint formed by injection molding of the semi-molding mechanism (2).

2. The plastic pipe joint welding machine according to claim 1, characterized in that: The top plate (1) has limit rails (12) at both ends of its lower surface. A rotating shaft (13) is provided between the limit rails (12). The rotating shaft (13) has threaded grooves (14) with opposite spiral directions on both sides of its surface. A motor bracket (15) is fixedly installed on one side of the top plate (1). A first motor (16) is provided on the motor bracket (15). The first motor (16) is fixedly connected to one end of the rotating shaft (13). The two mold plates (3) have upper support plates (17) on one side. A slider (18) is provided on the upper surface of the upper support plate (17). The slider (18) is screwed to the corresponding threaded groove (14) and slides with the inner wall of the limit rail (12).

3. The plastic pipe joint welding machine according to claim 1, characterized in that: The demolding mechanism (11) includes a connecting plate (19), an annular demolding pressure plate (20), and a connecting rod (21). The connecting plate (19) and the annular demolding pressure plate (20) are respectively disposed on the upper and lower sides of the top plate (1). The connecting rod (21) slides through the top plate (1) and the two ends of the connecting rod (21) are respectively fixedly connected to the connecting plate (19) and the annular demolding pressure plate (20). The annular demolding pressure plate (20) is sleeved on the outside of the fixed mold clamping column (8) and slides with the fixed mold clamping column (8). A slot (22) for avoiding the injection head is provided on one side of the annular demolding pressure plate (20). When the annular demolding pressure plate (20) is in the mold clamping position, the slot (22) corresponds to the position of the injection hole (10).

4. A plastic pipe joint welding machine according to claim 3, characterized in that: Connecting blocks (23) are respectively provided on both sides of the connecting plate (19). A lifting drive assembly is provided on the connecting block (23). The lifting drive assembly includes a screw (24), a second motor (25), and a guide rod (26). The second motor (25) is used to drive the screw (24) to rotate. The screw (24) is screwed onto one of the connecting blocks (23), and the guide rod (26) is slidably mounted on the other connecting block (23). The top plate (1) is fixedly installed with a first support column (27), and a support plate (28) is provided on the top of the first support column (27). The screw (24) is rotatably assembled between the lower surface of the support plate (28) and the upper surface of the top plate (1). The guide rod (26) is fixedly installed between the lower surface of the support plate (28) and the upper surface of the top plate (1).

5. A plastic pipe joint welding machine according to claim 1, characterized in that: The injection molding mechanism includes a branch pipe (29), a main pipe (30), an injection molding box (31), and a connecting hose (32). One end of the branch pipe (29) with an injection head passes through the empty groove (22) and the injection hole (10) in sequence and communicates with the inside of the mold groove (4). The other end of the branch pipe (29) is connected to the output end of the main pipe (30). The injection molding box (31) is set on the top plate (1). The outlet of the injection molding box (31) and the input end of the main pipe (30) are connected by the connecting hose (32).

6. A plastic pipe joint welding machine according to claim 2, characterized in that: A second support column (33) is fixedly installed on the lower surface of the upper support plate (17). A lower support plate (34) is provided at the bottom end of the second support column (33). A cooling mechanism (35) is provided on the lower support plate (34). The cooling mechanism (35) includes a water tank (36), a condenser (37), and a water pipe (38). The condenser (37) is used to cool the liquid inside the water tank (36). Both ends of the water pipe (38) are connected to the inside of the water tank (36), and a circulation pump is provided on the water pipe (38). The mold plate (3) has a first cavity (39) inside. The water pipe (38) is a flexible hose, with its middle part set in the first cavity (39) and the water pipe (38) coiled around the back side of the mold groove (4).

7. A plastic pipe joint welding machine according to claim 6, characterized in that: The top plate (1) has several mounting holes (40) on its surface. The fixed mold clamping column (8) is fixedly sleeved on the mounting holes (40). The fixed mold clamping column (8) has a second cavity inside. The upper end face of the fixed mold clamping column (8) has a water pipe inlet (41). The top plate (1) is also provided with a cooling mechanism (35). The water pipe (38) of the cooling mechanism (35) enters the second cavity through the water pipe inlet (41) and is coiled in the second cavity.

8. A plastic pipe joint welding machine according to claim 1, characterized in that: A bottom plate (42) is provided at the lower end of the top plate (1). A third support column (43) is fixedly connected between the top plate (1) and the bottom plate (42). Limiting grooves (44) are respectively opened on the surface of the third support column (43). A storage box (45) is provided on the upper surface of the bottom plate (42). A handle is provided on the front side of the storage box (45). Guide rails (46) are respectively provided on both sides of the outside of the storage box (45). The guide rails (46) slide with the limiting grooves (44).

9. A plastic pipe joint welding machine according to claim 1, characterized in that: The upper surface of the template (3) is provided with T-shaped sliders (47) at both ends, and the lower surface of the top plate (1) is provided with T-shaped tracks (48) on both sides. The T-shaped sliders (47) and the T-shaped tracks (48) slide together.

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