A telescopic water pipe extrusion molding device and its molding process

Abstract

The present invention discloses a telescopic water pipe extrusion molding device and its molding process in the technical field of telescopic water pipe production, including an extruder and several die shells. The open end of the die shell is slidably connected with two connecting plates. Between the two connecting plates, several first aluminum plates, several second aluminum plates and several baffles are arranged. Both the first aluminum plates and the second aluminum plates can be bent into an arc shape under the action of an external force. The first aluminum plates, the second aluminum plates and the baffles are connected by a connecting mechanism and jointly enclose a semi-circle. The connecting mechanism is used to always tightly connect between several first aluminum plates, several second aluminum plates and several baffles. A driving mechanism is arranged inside the die shell, and the driving mechanism is used to adjust the size of the semi-circle formed by the first aluminum plates, the second aluminum plates and the baffles in equal proportion, solving the problem that the die in the existing telescopic water pipe extrusion molding device cannot be adjusted according to the usage situation.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopic water pipe production, and specifically to a telescopic water pipe extrusion molding device and its molding process. Background Art

[0002] The telescopic water pipe is also called a corrugated pipe. The telescopic water pipe extruder is the main production equipment in the telescopic water pipe extrusion molding process. After the raw materials of the telescopic water pipe are put into the hopper, the external power transmission, the heat transfer of the external heating element, and the frictional force and melt shear force of the barrel and the screw are used to realize the extrusion molding of the raw materials for conveying, compressing, melting, and shear mixing.

[0003] In the existing technology, the extruder shapes the molten raw materials through a mold, and the structure and shape of the mold are fixed. When it is necessary to produce telescopic water pipes of different sizes, the staff needs to manually replace the mold. Since a large number of molds are used when the telescopic water pipe extruder is processing, the workload of the staff is greatly increased. Secondly, a large number of different-sized molds need to be purchased for use, increasing the production and processing costs, and the molds in the existing telescopic water pipe extrusion molding equipment cannot be adjusted according to the usage situation.

[0004] Based on this, the present invention designs a telescopic water pipe extrusion molding device and its molding process to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a telescopic water pipe extrusion molding device and its molding process whose mold size can be adjusted according to the usage situation, so as to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A telescopic water pipe extrusion molding device includes an extruder and a plurality of mold shells. Two connecting plates are slidably connected to the open end of the mold shell. A plurality of first aluminum plates, a plurality of second aluminum plates, and a plurality of baffles are arranged between the two connecting plates. Both the first aluminum plates and the second aluminum plates can be bent into an arc shape under the action of an external force. The first aluminum plates, the second aluminum plates, and the baffles are connected by a connecting mechanism and jointly enclose a semi-circle. The connecting mechanism is used to always tightly connect between the plurality of first aluminum plates, the plurality of second aluminum plates, and the plurality of baffles. A driving mechanism is arranged inside the mold shell, and the driving mechanism is used to adjust the size of the semi-circle formed by the first aluminum plates, the second aluminum plates, and the baffles in equal proportion;

[0007] As a further solution of the present invention, the connecting mechanism includes first telescopic grooves opened at one ends of the first aluminum plates. First telescopic aluminum plates are fixedly installed at the other ends of the first aluminum plates. No first telescopic grooves are opened at the ends of the top first aluminum plates, which are fixedly connected to the upper connecting plate. No first telescopic aluminum plates are fixedly installed at the ends of the bottom first aluminum plates, which are fixedly connected to the lower connecting plate. The first telescopic aluminum plates all pass through and are slidably connected to the adjacent first telescopic grooves. One side of the first aluminum plate close to the mold housing is connected to two baffles through a shielding mechanism. The second aluminum plates are all located between two adjacent baffles and are in close contact with both of them. The shielding mechanism is used to always shield between the first aluminum plate and the second aluminum plate through the baffles when the adjacent first aluminum plates approach or move away from each other. Adjacent second aluminum plates are all connected through a telescopic mechanism. The telescopic mechanism is used to always connect the adjacent second aluminum plates into a whole. A number of connecting rods are arranged inside the mold housing. The centers of the two first aluminum plates and the two second aluminum plates on the side close to the mold housing from front to back are all connected through the connecting rods. The first telescopic aluminum plate can be bent into an arc under the action of an external force;

[0008] As a further solution of the present invention, the shielding mechanism includes two connecting blocks fixedly installed on one side of the first aluminum plate close to the mold housing. Two installation grooves are opened on one side of the first aluminum plate close to the mold housing. The baffles are all located in the installation grooves and are slidably connected to them. The connecting blocks are fixedly connected to the middle parts of the sides of the baffles close to the center of the first aluminum plate. Second telescopic grooves are opened at one ends of the baffles. Telescopic plates are fixedly installed at the other ends of the baffles. No second telescopic grooves are opened at the ends of the top baffles, and third telescopic grooves are opened. No telescopic plates are fixedly installed at the ends of the bottom baffles, and third telescopic grooves are also opened. A number of inserting plates corresponding to the third telescopic grooves one by one are fixedly installed on one side of the connecting plate close to the baffle. The inserting plates all pass through and are slidably connected to the adjacent third telescopic grooves. The telescopic plates all pass through and are slidably connected to the adjacent second telescopic grooves;

[0009] As a further solution of the present invention, the telescopic mechanism includes fourth telescopic grooves opened at one ends of the second aluminum plates. Second telescopic aluminum plates are fixedly installed at the other ends of the second aluminum plates. No fourth telescopic grooves are opened at the ends of the top second aluminum plates, which are fixedly connected to the upper connecting plate. No second telescopic aluminum plates are fixedly installed at the ends of the bottom second aluminum plates, which are fixedly connected to the lower connecting plate. The second telescopic aluminum plates all pass through and are slidably connected to the adjacent fourth telescopic grooves. The second telescopic aluminum plate can be bent into an arc under the action of an external force;

[0010] As a further solution of the present invention, the driving mechanism includes an arc-shaped bracket fixedly installed inside the mold housing. A number of screws corresponding to the connecting rods one by one are rotatably connected to the middle of the arc-shaped bracket. The ends of the screws away from the mold housing all pass through the connecting rods and are threadedly connected thereto. A number of limiting rods are fixedly installed on one side of the arc-shaped bracket close to the connecting rods. The side walls of the limiting rods are all in close contact with the connecting rods. The limiting rods are used to prevent the connecting rods from rotating. A rotating mechanism is provided at the bottom end of the mold housing. The rotating mechanism is used to drive a number of screws to rotate synchronously. The top screw and the bottom screw are both in a vertical state;

[0011] As a further solution of the present invention, the rotating mechanism includes drive rods corresponding to the screws one by one and rotatably connected to the rear ends of the arc-shaped brackets. Conical gears are fixedly installed at the front ends of the drive rods and the ends of the screws close to the mold housing and are meshed with each other. Adjacent drive rods are all connected by a transmission belt. Rotating rods are fixedly installed at the bottom ends of the conical gears connected to the bottom screw. The bottom ends of the rotating rods all pass through the mold housing and are rotatably connected thereto. A recording mechanism is provided at the bottom end of the rotating rod. The recording mechanism is used to record the number of turns of the rotating rod;

[0012] As a further solution of the present invention, the recording mechanism includes rotating handles fixedly installed at the bottom ends of the rotating rods. Conical rods are slidably connected to the bottom ends of the mold housing. Pull ropes are fixedly installed at the ends of the conical rods close to the rotating rods. The other ends of the pull ropes are wound around the outer sides of the bottom ends of the rotating rods. Fixed blocks are fixedly installed in the middle of the bottom ends of the mold housing. Elastic bands are fixedly installed on one side of the fixed blocks close to the conical rods. The other ends of the elastic bands are all connected to the side walls of the conical rods. A scale bar is fixedly installed at the bottom end of the mold housing. The conical ends of the conical rods are aligned with the scale bar;

[0013] A telescopic water pipe extrusion molding process includes the following steps:

[0014] Step 1: When adjustment is required, just rotate the rotating handle. The rotation of the rotating handle drives a number of screws to rotate synchronously through the rotating mechanism;

[0015] Step 2: The rotation of a number of screws drives the adjacent first aluminum plates to approach or move away from each other through the driving mechanism. The movement of the first aluminum plates drives the adjacent second aluminum plates to approach or move away from each other;

[0016] Step 3: During the movement of the first aluminum plates and the second aluminum plates, the connecting mechanism always connects a number of first aluminum plates and a number of second aluminum plates into a whole through the baffle, the first telescopic aluminum plate and the second telescopic aluminum plate;

[0017] Step 4: After the adjustment in Steps 1, 2, and 3, extrude a qualified tube blank, and then soak the tube blank in latex. Soaking the tube blank in latex once thickens both its inner and outer surfaces. According to the number of soakings, arbitrary adjustment of the inner and outer diameter dimensions of the water pipe is achieved.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By setting up a connection mechanism in the present invention, the driving mechanism drives several first aluminum plates to move away from each other proportionally through a connecting rod. At this time, the connection mechanism ensures that there are no gaps between the first aluminum plate, the second aluminum plate, and the baffle until the range enclosed by the three is adjusted to a suitable size, enabling workers not to replace different molds when processing different telescopic water pipes, greatly reducing the workload of workers; at the same time, the manufacturer does not have to purchase a large number of different-sized molds in advance, thereby reducing the production and processing costs, and solving the problem that the molds in the existing telescopic water pipe extrusion molding equipment cannot be adjusted according to the usage situation.

[0020] 2. By setting up a recording mechanism in the present invention, turn the handle to gradually wind the pull rope around the outside of the rotating rod. At this time, the pull rope pulls the tapered rod to move; when the adjustment is completed, the tapered rod remains stationary under the action of the elastic band and the pull rope, and the scale on the surface of the scale bar aligned with the tapered end of the tapered rod is the number of turns the rotating rod rotates. When adjusting other molds, workers can rotate the same number of turns, thus ensuring that there is no error in the docking between the molds. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the process flow chart of the present invention;

[0022] Figure 2 is the overall structure schematic diagram of the present invention;

[0023] Figure 3 is the front perspective structure schematic diagram of the present invention;

[0024] Figure 4 is the rear perspective structure schematic diagram of the present invention;

[0025] Figure 5 is the schematic diagram of the stepped section of the bottom perspective structure of the present invention;

[0026] Figure 6 is the present invention Figure 5 magnified structure schematic diagram at A in;

[0027] Figure 7 is the schematic diagram of the stepped section of the internal structure of the front perspective of the present invention;

[0028] Figure 8 is the present invention Figure 7Schematic diagram of the enlarged structure at position B in the [device];

[0029] Figure 9 Schematic diagram of the stepped cross-sectional structure of the internal structure of the present invention from a side view;

[0030] Figure 10 Schematic diagram of the connection structure between the connecting rod and the limiting rod in the present invention;

[0031] Figure 11 Schematic diagram of the connection structure between the connecting plate and the first aluminum plate in the present invention;

[0032] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged structure at position C in the [device];

[0033] Figure 13 Schematic diagram of the connection structure between the baffle and the telescopic plate in the present invention;

[0034] Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure at position D in the [device];

[0035] Figure 15 Schematic diagram of the cross-sectional structure of the internal structure of the present invention from a front view;

[0036] Figure 16 For the present invention Figure 15 Schematic diagram of the enlarged structure at position E in the [device];

[0037] Figure 17 Schematic diagram of the connection structure between the first aluminum plate and the second aluminum plate in the present invention;

[0038] Figure 18 For the present invention Figure 17 Schematic diagram of the enlarged structure at position F in the [device].

[0039] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0040] 1. Extruder; 2. Die housing; 3. Connecting plate; 4. First aluminum plate; 5. Second aluminum plate; 6. Baffle; 7. First telescopic groove; 8. First telescopic aluminum plate; 9. Connecting block; 10. Installation groove; 11. Second telescopic groove; 12. Telescopic plate; 13. Third telescopic groove; 14. Insertion plate; 15. Connecting rod; 16. Fourth telescopic groove; 17. Second telescopic aluminum plate; 18. Arc-shaped bracket; 19. Screw; 20. Limiting rod; 21. Transmission rod; 22. Bevel gear; 23. Transmission belt; 24. Rotating rod; 25. Rotating handle; 26. Tapered rod; 27. Pulling rope; 28. Fixed block; 29. Elastic band; 30. Scale bar. Detailed implementation manners

[0041] Please refer to Figures 1 - 18, the present invention provides a technical solution: a telescopic water pipe extrusion molding device, including an extruder 1 and a number of die shells 2. The open end of the die shell 2 is slidably connected with two connecting plates 3. Between the two connecting plates 3, there are a number of first aluminum plates 4, a number of second aluminum plates 5 and a number of baffles 6. Both the first aluminum plate 4 and the second aluminum plate 5 can be bent into an arc shape under the action of an external force. The first aluminum plate 4, the second aluminum plate 5 and the baffle 6 are connected by a connecting mechanism and jointly enclose a semicircle. The connecting mechanism is used to always tightly connect the number of first aluminum plates 4, the number of second aluminum plates 5 and the number of baffles 6. A driving mechanism is arranged inside the die shell 2, and the driving mechanism is used to adjust the size of the semicircle formed by the first aluminum plate 4, the second aluminum plate 5 and the baffle 6 in equal proportion;

[0042] The connecting mechanism includes first telescopic grooves 7 opened at one end of each of the first aluminum plates 4. At the other end of each of the first aluminum plates 4, a first telescopic aluminum plate 8 is fixedly installed. The ends of the top first aluminum plates 4 do not have first telescopic grooves 7 and are fixedly connected to the upper connecting plate 3. The ends of the bottom first aluminum plates 4 do not have first telescopic aluminum plates 8 fixedly installed and are fixedly connected to the lower connecting plate 3. The first telescopic aluminum plates 8 all pass through and are slidably connected with the adjacent first telescopic grooves 7. One side of the first aluminum plate 4 close to the die shell 2 is connected to the two baffles 6 through a shielding mechanism. The second aluminum plates 5 are all located between two adjacent baffles 6 and are in close contact with both of them. The shielding mechanism is used to always shield between the first aluminum plate 4 and the second aluminum plate 5 through the baffle 6 when the adjacent first aluminum plates 4 approach or move away from each other. Adjacent second aluminum plates 5 are all connected by a telescopic mechanism, and the telescopic mechanism is used to always connect the adjacent second aluminum plates 5 into a whole. A number of connecting rods 15 are arranged inside the die shell 2. The centers of the two first aluminum plates 4 and the two second aluminum plates 5 on the side close to the die shell 2 from front to back are all connected by the connecting rods 15. The first telescopic aluminum plate 8 can be bent into an arc shape under the action of an external force;

[0043] During operation, when it is necessary to adjust the size of the mold groove according to the required size of the telescopic water pipe to be processed, taking the example of enlarging the mold groove, the driving mechanism drives several first aluminum plates 4 to move away from each other proportionally through the connecting rod 15. The movement of the first aluminum plates 4 drives the two connecting plates 3 to move away from each other. At the same time, the movement of the first aluminum plates 4 drives the first telescopic aluminum plates 8 to slide towards the opening of the first telescopic groove 7, thereby ensuring that there is no gap between adjacent first aluminum plates 4. Since adjacent first aluminum plates 4 move away from each other, the bending arc of the first aluminum plates 4 changes under the action of their own elasticity. The same is true for the first telescopic aluminum plates 8. As a result, several first aluminum plates 4 and several first telescopic aluminum plates 8 are always spliced into a semi-circle during the adjustment process, making the produced finished products more standard. The movement of the first aluminum plates 4 drives the second aluminum plates 5 to move synchronously through the connecting rod 15. The movement and deformation of the second aluminum plates 5 are the same as above. The movement of the first aluminum plates 4 drives the baffle plates 6 to move synchronously through the shielding mechanism. At this time, adjacent baffle plates 6 gradually move away from each other. The shielding mechanism ensures that there is no gap between adjacent baffle plates 6, ensuring the integrity of the mold groove surface, until the range surrounded by the first aluminum plates 4, the second aluminum plates 5 and the baffle plates 6 is adjusted to the appropriate size, thereby realizing the adjustment of the size of the mold groove, so that the staff does not need to replace different molds when processing different telescopic water pipes, greatly reducing the workload of the staff and improving the production and processing efficiency. At the same time, the manufacturer does not need to purchase a large number of different-sized molds in advance, thereby reducing the production and processing costs and solving the problem that the molds in the existing telescopic water pipe extrusion molding equipment cannot be adjusted according to the usage situation.

[0044] As a further solution of the present invention, the shielding mechanism includes two connecting blocks 9 fixedly installed on one side of the first aluminum plate 4 close to the mold housing 2. Two installation grooves 10 are opened on one side of the first aluminum plate 4 close to the mold housing 2. The baffle plates 6 are all located in the installation grooves 10 and are slidably connected thereto. The connecting blocks 9 are fixedly connected to the middle of one side of the baffle plates 6 close to the center of the first aluminum plate 4. A second telescopic groove 11 is opened at one end of each baffle plate 6, and a telescopic plate 12 is fixedly installed at the other end of each baffle plate 6. The ends of the top baffle plates 6 are not provided with second telescopic grooves 11 but are provided with third telescopic grooves 13. The ends of the bottom baffle plates 6 are not fixedly installed with telescopic plates 12 and are also provided with third telescopic grooves 13. A plurality of insertion plates 14 corresponding to the third telescopic grooves 13 one by one are fixedly installed on one side of the connecting plate 3 close to the baffle plate 6. The insertion plates 14 all pass through the adjacent third telescopic grooves 13 and are slidably connected thereto. The telescopic plates 12 all pass through the adjacent second telescopic grooves 11 and are slidably connected thereto.

[0045] During operation, when the first aluminum plates 4 move away from each other, the first aluminum plates 4 move through the connecting blocks 9 to drive the baffles 6 to move synchronously. At this time, the telescopic plates 12 slide towards the openings of the second telescopic grooves 11, and the insertion plates 14 slide towards the openings of the third telescopic grooves 13, thereby ensuring that there are no gaps between adjacent baffles 6 and between the baffles 6 and the connecting plates 3; when the bending arc of the first aluminum plates 4 changes while moving, the parts of the baffles 6 and the telescopic plates 12 inside the installation grooves 10 slide inside the installation grooves 10, and the edges of both will not slide out of the openings of the installation grooves 10, thereby ensuring that when the arc of the first aluminum plates 4 changes, there is no gap between the first aluminum plates 4 and the baffles 6, ensuring the integrity of the mold groove surface.

[0046] As a further solution of the present invention, the telescopic mechanism includes fourth telescopic grooves 16 opened at one ends of the second aluminum plates 5. Second telescopic aluminum plates 17 are fixedly installed at the other ends of the second aluminum plates 5. The ends of the top second aluminum plates 5 are not provided with fourth telescopic grooves 16 and are fixedly connected to the upper connecting plate 3. The ends of the bottom second aluminum plates 5 are not fixedly installed with second telescopic aluminum plates 17 and are fixedly connected to the lower connecting plate 3. The second telescopic aluminum plates 17 all pass through and are slidably connected to the adjacent fourth telescopic grooves 16. The second telescopic aluminum plates 17 can be bent into an arc under the action of an external force;

[0047] During operation, the connecting rod 15 moves to drive the first aluminum plates 4 and the second aluminum plates 5 to move synchronously. The movement of the second aluminum plates 5 drives the second telescopic aluminum plates 17 to slide towards the openings of the fourth telescopic grooves 16, thereby ensuring that there are no gaps between adjacent second aluminum plates 5; since the adjacent second aluminum plates 5 move away from each other, the bending arc of the second aluminum plates 5 changes under the action of their own elasticity. The second telescopic aluminum plates 17 are the same as above, so that a number of second aluminum plates 5 and a number of second telescopic aluminum plates 17 are always spliced into a semi-circle during the adjustment process, making the produced finished products more standard.

[0048] As a further solution of the present invention, the driving mechanism includes an arc-shaped bracket 18 fixedly installed inside the mold housing 2. A number of screws 19 corresponding to the connecting rods 15 one by one are rotatably connected to the middle of the arc-shaped bracket 18. The ends of the screws 19 away from the mold housing 2 all pass through the connecting rods 15 and are threadedly connected thereto. A number of limiting rods 20 are fixedly installed on one side of the arc-shaped bracket 18 close to the connecting rods 15. The side walls of the limiting rods 20 are in close contact with the connecting rods 15. The limiting rods 20 are used to prevent the connecting rods 15 from rotating. A rotating mechanism is provided at the bottom end of the mold housing 2. The rotating mechanism is used to drive a number of screws 19 to rotate synchronously. The top screw 19 and the bottom screw 19 are both in a vertical state;

[0049] During operation, the drag bar screw 19 is driven to rotate synchronously by a rotating mechanism. The rotation of the screw 19 drives a number of connecting rods 15 to move synchronously towards the arc-shaped bracket 18 through the action of the screw 19. The movement of the connecting rods 15 drives the movement of the first aluminum plates 4 and the second aluminum plates 5, thereby realizing the equal-proportion mutual separation between a number of first aluminum plates 4 and the equal-proportion mutual separation between a number of second aluminum plates 5. The rotation of the top screw 19 drives the upper connecting plate 3 to move directly upward through the top connecting rod 15 and the top first aluminum plate 4, and the rotation of the bottom screw 19 drives the lower connecting plate 3 to move directly downward through the bottom connecting rod 15 and the bottom first aluminum plate 4, thus ensuring that the right end of the mold housing 2 will not be deformed due to extrusion.

[0050] As a further solution of the present invention, the rotating mechanism includes drive rods 21 corresponding to the screws 19 respectively, which are rotatably connected to the rear ends of the arc-shaped brackets 18. At the front ends of the drive rods 21 and at one ends of the screws 19 close to the mold housing 2, bevel gears 22 are fixedly installed and meshed with each other. Between adjacent two drive rods 21, drive belts 23 are connected. At the bottom ends of the bevel gears 22 connected to the bottom of the bottom screw 19, rotating rods 24 are fixedly installed. The bottom ends of the rotating rods 24 all pass through the mold housing 2 and are rotatably connected thereto. A recording mechanism is provided at the bottom end of the rotating rod 24, and the recording mechanism is used to record the number of turns of the rotation of the rotating rod 24.

[0051] During operation, only need to rotate the rotating rod 24. The rotation of the rotating rod 24 drives the bottom bevel gear 22 to rotate. The rotation of the bottom bevel gear 22 drives the bottom screw 19 and the bottom drive rod 21 to rotate synchronously. The rotation of the bottom drive rod 21 drives a number of drive rods 21 to rotate synchronously through the drive belt 23. The rotation of a number of drive rods 21 drives a number of screws 19 to rotate synchronously through the bevel gears 22, thereby realizing the synchronous adjustment of the screws 19.

[0052] As a further solution of the present invention, the recording mechanism includes rotating handles 25 fixedly installed at the bottom ends of the rotating rods 24. At the bottom ends of the mold housing 2, tapered rods 26 are slidably connected. At one ends of the tapered rods 26 close to the rotating rods 24, pull ropes 27 are fixedly installed. The other ends of the pull ropes 27 are wound around the outer sides of the bottom ends of the rotating rods 24. In the middle of the bottom ends of the mold housing 2, fixing blocks 28 are fixedly installed. On one sides of the fixing blocks 28 close to the tapered rods 26, elastic bands 29 are fixedly installed. The other ends of the elastic bands 29 are all connected to the side walls of the tapered rods 26. A scale bar 30 is fixedly installed at the bottom end of the mold housing 2, and the tapered ends of the tapered rods 26 are aligned with the scale bar 30.

[0053] During operation, when it is necessary to adjust the size of the die groove, just rotate the rotating handle 25. The rotation of the rotating handle 25 drives the rotating rod 24 to rotate. As the rotating rod 24 rotates, the pull rope 27 is gradually wound around the outer side of the rotating rod 24. At this time, the pull rope 27 pulls the tapered rod 26 to move towards the rotating rod 24, and the movement of the tapered rod 26 pulls the elastic band 29 to stretch. When the die adjustment is completed, the operator stops rotating the rotating handle 25. At this time, the tapered rod 26 remains stationary under the action of the elastic band 29 and the pull rope 27. The pulling force of the elastic band 29 is small and cannot drive the rotating rod 24 to rotate through the pull rope 27. At this time, the scale on the surface of the scale bar 30 aligned with the tapered end of the tapered rod 26 is the number of turns of the rotation of the rotating rod 24. When adjusting other dies, the operator can rotate the same number of turns, thus ensuring that there is no error in the docking between the dies.

[0054] A telescopic water pipe extrusion molding process includes the following steps:

[0055] Step 1: When adjustment is required, just rotate the rotating handle 25. The rotation of the rotating handle 25 drives a number of screw rods 19 to rotate synchronously through a rotating mechanism;

[0056] Step 2: The rotation of a number of screw rods 19 drives the adjacent first aluminum plates 4 to move closer to or away from each other through a driving mechanism. The movement of the first aluminum plates 4 drives the adjacent second aluminum plates 5 to move closer to or away from each other;

[0057] Step 3: During the movement of the first aluminum plates 4 and the second aluminum plates 5, the connecting mechanism always connects a number of first aluminum plates 4 and a number of second aluminum plates 5 into a whole through the baffle 6, the first telescopic aluminum plate 8 and the second telescopic aluminum plate 17;

[0058] Step 4: After the adjustment in Step 1, Step 2 and Step 3, an extruded tube blank that meets the requirements is obtained. Then the tube blank is soaked in latex. After the tube blank is soaked in latex once, both its inner surface and outer surface thicken. According to the number of soaking times, the inner diameter and outer diameter dimensions of the water pipe can be adjusted arbitrarily.

Claims

1. A telescopic water pipe extrusion molding device, comprising an extruder (1) and several die shells (2), characterized in that: Two connecting plates (3) are slidably connected to the open end of the mold shell (2). A number of first aluminum plates (4), a number of second aluminum plates (5) and a number of baffles (6) are arranged between the two connecting plates (3). The first aluminum plates (4) and the second aluminum plates (5) can be bent into an arc shape under the action of an external force. The first aluminum plates (4), the second aluminum plates (5) and the baffles (6) are connected by a connecting mechanism and jointly form a semi-circle. The connecting mechanism is used to always tightly connect the number of first aluminum plates (4), the number of second aluminum plates (5) and the number of baffles (6). A driving mechanism is arranged on the inner side of the mold shell (2). The driving mechanism is used to adjust the size of the semi-circle formed by the first aluminum plates (4), the second aluminum plates (5) and the baffles (6) in equal proportion; The connecting mechanism includes first telescopic grooves (7) opened at one end of each of the first aluminum plates (4). A first telescopic aluminum plate (8) is fixedly installed at the other end of each of the first aluminum plates (4). The ends of the top first aluminum plates (4) are not provided with first telescopic grooves (7) and are fixedly connected to the upper connecting plate (3). The ends of the bottom first aluminum plates (4) are not fixedly installed with first telescopic aluminum plates (8) and are fixedly connected to the lower connecting plate (3). The first telescopic aluminum plates (8) all pass through and are slidably connected to the adjacent first telescopic grooves (7). One side of the first aluminum plate (4) close to the mold shell (2) is connected to the two baffles (6) through a shielding mechanism. The second aluminum plates (5) are all located between two adjacent baffles (6) and are in close contact with both of them. The shielding mechanism is used to always shield between the first aluminum plates (4) and the second aluminum plates (5) through the baffles (6) when the adjacent first aluminum plates (4) approach or move away from each other. Adjacent second aluminum plates (5) are connected by a telescopic mechanism. The telescopic mechanism is used to always connect the adjacent second aluminum plates (5) into a whole. A number of connecting rods (15) are arranged on the inner side of the mold shell (2). The centers of the sides of the two first aluminum plates (4) and the two second aluminum plates (5) close to the mold shell (2) from front to back are connected by the connecting rods (15). The first telescopic aluminum plate (8) can be bent into an arc shape under the action of an external force; The shielding mechanism includes two connecting blocks (9) fixedly installed on one side of the first aluminum plate (4) close to the mold housing (2). Two installation grooves (10) are formed on one side of the first aluminum plate (4) close to the mold housing (2). The baffles (6) are all located in the installation grooves (10) and are slidably connected thereto. The connecting blocks (9) are fixedly connected to the middle of one side of the baffles (6) close to the center position of the first aluminum plate (4). A second telescopic groove (11) is formed at one end of each baffle (6). A telescopic plate (12) is fixedly installed at the other end of each baffle (6). The end of the top baffle (6) is not provided with a second telescopic groove (11) but is provided with a third telescopic groove (13). The end of the bottom baffle (6) is not fixedly installed with a telescopic plate (12) but is also provided with a third telescopic groove (13). A plurality of insertion plates (14) corresponding to the third telescopic grooves (13) one by one are fixedly installed on one side of the connecting plate (3) close to the baffle (6). The insertion plates (14) all pass through the adjacent third telescopic grooves (13) and are slidably connected thereto. The telescopic plates (12) all pass through the adjacent second telescopic grooves (11) and are slidably connected thereto; The telescopic mechanism includes fourth telescopic grooves (16) formed at one end of each second aluminum plate (5). A second telescopic aluminum plate (17) is fixedly installed at the other end of each second aluminum plate (5). The end of the top second aluminum plate (5) is not provided with a fourth telescopic groove (16) and is fixedly connected to the upper connecting plate (3). The end of the bottom second aluminum plate (5) is not fixedly installed with a second telescopic aluminum plate (17) and is fixedly connected to the lower connecting plate (3). The second telescopic aluminum plates (17) all pass through the adjacent fourth telescopic grooves (16) and are slidably connected thereto. The second telescopic aluminum plates (17) can be bent into an arc shape under the action of an external force; The driving mechanism includes an arc-shaped bracket (18) fixedly installed on the inner side of the mold housing (2). A plurality of screws (19) corresponding to the connecting rods (15) one by one are rotatably connected to the middle of the arc-shaped bracket (18). The ends of the screws (19) away from the mold housing (2) all pass through the connecting rods (15) and are threadedly connected thereto. A plurality of limiting rods (20) are fixedly installed on one side of the arc-shaped bracket (18) close to the connecting rods (15). The side walls of the limiting rods (20) are closely attached to the connecting rods (15). The limiting rods (20) are used to limit the connecting rods (15) from rotating. A rotating mechanism is arranged at the bottom end of the mold housing (2). The rotating mechanism is used to drive a plurality of screws (19) to rotate synchronously. The top screw (19) and the bottom screw (19) are both in a vertical state.

2. The telescopic water pipe extrusion molding device according to claim 1, characterized in that: The rotation mechanism includes drive rods (21) respectively corresponding to and rotatably connected to the rear ends of the arc-shaped brackets (18). At the front ends of the drive rods (21) and one ends of the screw rods (19) close to the mold housing (2), bevel gears (22) are fixedly installed and meshed with each other. Between adjacent drive rods (21), they are all connected by a transmission belt (23). At the bottom ends of the bevel gears (22) connected to the bottoms of the bottom screw rods (19), rotating rods (24) are fixedly installed. The bottom ends of the rotating rods (24) all pass through the mold housing (2) and are rotatably connected thereto. A recording mechanism is provided at the bottom ends of the rotating rods (24), and the recording mechanism is used to record the number of turns of the rotation of the rotating rods (24).

3. The telescopic water pipe extrusion molding device according to claim 2, characterized in that: The recording mechanism includes rotating handles (25) fixedly installed at the bottom ends of the rotating rods (24). At the bottom ends of the mold housing (2), tapered rods (26) are slidably connected. At one ends of the tapered rods (26) close to the rotating rods (24), pull ropes (27) are fixedly installed. The other ends of the pull ropes (27) are wound around the outer sides of the bottom ends of the rotating rods (24). In the middle of the bottom ends of the mold housing (2), fixed blocks (28) are fixedly installed. On one sides of the fixed blocks (28) close to the tapered rods (26), elastic bands (29) are fixedly installed. The other ends of the elastic bands (29) are all connected to the side walls of the tapered rods (26). A scale bar (30) is fixedly installed at the bottom end of the mold housing (2), and the tapered ends of the tapered rods (26) are aligned with the scale bar (30).

4. A telescopic water pipe extrusion molding process, applicable to the telescopic water pipe extrusion molding device described in any one of claims 1-3, characterized in that: The specific steps of this forming process are as follows: Step 1: When adjustment is required, just rotate the rotating handle (25). The rotation of the rotating handle (25) drives several screw rods (19) to rotate synchronously through the rotation mechanism; Step 2: The rotation of several screw rods (19) drives the adjacent first aluminum plates (4) to approach or move away from each other through the drive mechanism. The movement of the first aluminum plates (4) drives the adjacent second aluminum plates (5) to approach or move away from each other; Step 3: During the movement of the first aluminum plates (4) and the second aluminum plates (5), the connecting mechanism always connects several first aluminum plates (4) and several second aluminum plates (5) into a whole through the baffle (6), the first telescopic aluminum plate (8) and the second telescopic aluminum plate (17); Step 4: After the adjustment in Step 1, Step 2 and Step 3, extrude a tube blank that meets the requirements, and then soak the tube blank in latex. When the tube blank is soaked in latex once, both its inner surface and outer surface thicken. According to the number of soaking times, the inner diameter and outer diameter dimensions of the water pipe can be adjusted arbitrarily.

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