A plastic tube shaping machine head structure

Abstract

This invention discloses a plastic tube shaping head structure, relating to the field of plastic tube bending technology. It has the advantage of improving cooling efficiency, thereby reducing the springback of the plastic tube. The key technical points are: a heating box for heating the plastic tube and a discharge cylinder located on one side of the heating box. A turntable is rotatably connected to the discharge cylinder via a rotating mechanism. The turntable has two semi-circular bending wheels, and a pushing mechanism for moving the two bending wheels is also provided on the turntable. A bending mechanism is also included on the turntable, cooperating with the two bending wheels. When the pushing mechanism drives the two bending wheels closer together, the bending mechanism, in cooperation with the two bending wheels, clamps the plastic tube. At this time, the bending mechanism is used to bend the clamped plastic tube through the two bending wheels. Furthermore, an air-cooling mechanism is provided on the turntable for air-cooling the opposite sides of the outer wall of the bent plastic tube.

Description

Technical Field

[0001] This invention relates to the field of plastic tube bending technology, specifically to a plastic tube shaping head structure. Background Technology

[0002] Plastic pipes, also known as plastic conduits, are a general term for pipes made of plastic materials. In the manufacturing process of plastic pipes such as nylon PA / TPU pipes for automotive fuel systems, the plastic pipes undergo a cycle of preheating, bending, air cooling, and re-bending on a pipe bending machine.

[0003] However, current pipe bending machines, when air-cooling the bent plastic pipes, can only cool one side of the pipe, resulting in low cooling efficiency. When the bent portion of the plastic pipe is not adequately cooled, it is prone to springback, thus affecting the pipe's forming process. Therefore, the applicant has developed a new technical solution to address these problems during actual production. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a plastic tube shaping head structure that improves cooling efficiency, thereby reducing the occurrence of plastic tube springback.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] The present invention provides a plastic tube shaping head structure, including a heating box for heating the plastic tube and a discharge cylinder disposed on one side of the heating box. A turntable is rotatably connected to the discharge cylinder via a rotating mechanism, and the turntable is provided with two semi-circular bending wheels. One end of the plastic tube passes through the discharge cylinder and is located between the two bending wheels. The turntable is provided with a pushing mechanism for driving the two bending wheels to move closer or further apart.

[0007] It also includes a bending mechanism set on the turntable and cooperating with two bending wheels. When the pushing mechanism drives the two bending wheels to move closer to each other, the two bending wheels cooperate to clamp the plastic tube. At this time, the bending mechanism is used to bend the clamped plastic tube through the two bending wheels.

[0008] It also includes an air-cooling mechanism mounted on a turntable. The air-cooling mechanism includes a first cooling component and a second cooling component, which are located on opposite sides of the outer wall of the bent plastic tube and air-cool the plastic tube.

[0009] By adopting the above technical solution, the two bending wheels are brought closer together by the pushing mechanism, thereby clamping the plastic tube. Then, the bending mechanism bends the plastic tube clamped by the two bending wheels. After bending, the outer walls of the bent part of the plastic tube are cooled by air by the first cooling component and the second cooling component to fix its shape. In the above process, by cooling the outer walls of the bent part of the plastic tube by air, the cooling efficiency can be improved, thereby reducing the occurrence of springback of the plastic tube. It is simple and convenient to use.

[0010] Preferably, the turntable is provided with two slide rails, and the two slide rails are respectively located on both sides of the discharge cylinder. A first slide plate and a second slide plate are slidably connected to the two slide rails respectively. The turntable is provided with a sliding mechanism for simultaneously pushing the first slide plate and the second slide plate to slide away from or towards the turntable on the slide rails. The pushing mechanism, the two bending wheels, and the air cooling mechanism are all set on the second slide plate, and the bending mechanism is set on the first slide plate.

[0011] Preferably, the second slide plate has a fixed plate at the end away from the turntable, and the fixed plate is located at the opening of the discharge cylinder. The fixed plate has an mounting plate on the side away from the discharge cylinder. The mounting plate has a through groove that passes through the fixed plate and corresponds to the opening of the discharge cylinder. Both bending wheels have sliding seats, and both sliding seats are horizontally slidably connected to the side of the mounting plate away from the fixed plate. The sides of the two sliding seats that are close to each other have arc-shaped side grooves that cooperate with the through grooves. The side grooves are configured to cooperate with the bending wheels. One end of the plastic tube passes through the through groove and the two side grooves. The pushing mechanism includes a suspension plate at the top of the fixed plate, and the bottom end of the suspension plate has a pneumatic gripper for driving the two bending wheels to move closer to each other.

[0012] Preferably, the bending mechanism includes a bending motor mounted on a first sliding plate, and one end of the rotating shaft of the bending motor is provided with a rotating column via an eccentric coupling, and one end of the rotating column is provided with a positioning shaft coaxially. Both bending wheels are provided with coaxial circular grooves, and the end of the positioning shaft away from the rotating column is coaxially inserted into the two circular grooves. The rotating column is provided with a vertical plate, and the vertical plate is provided with a bending rod that cooperates with the two bending wheels. The plastic tube between the two bending wheels is located below the bending rod. When the rotating column rotates, the bending rod is used to bend the plastic tube through the two bending wheels.

[0013] Preferably, the first cooling component includes an L-shaped side plate disposed on the side of the suspension plate near the first sliding plate, and a horizontal plate is disposed at the bottom end of the side plate. An air blowing plate is disposed at the end of the horizontal plate away from the side plate. The side plate, the horizontal plate and the air blowing plate are hollow and interconnected. The air blowing plate is located above the space between the two bending wheels, and a first air blowing hole is provided on the air blowing plate to blow air into the plastic tube between the two bending wheels. An air inlet pipe is provided on the side plate.

[0014] Preferably, the second cooling component includes a conduit disposed at the end of the horizontal plate away from the side plate, the positioning shaft is hollow inside, the end of the conduit away from the horizontal plate is connected to the positioning shaft, the conduit is rotatably connected to the positioning shaft, and the positioning shaft is provided with a second air blowing hole for blowing air into the plastic tube between the two bending wheels, the second air blowing hole corresponding to the two bending wheels.

[0015] Preferably, the rotating column is provided with a stabilizing mechanism to reduce the bending of the plastic tube due to swaying.

[0016] Preferably, the stabilizing mechanism includes a rotating ring coaxially rotatably connected to the rotating column, and an L-shaped swing arm is provided on the outer wall of the rotating ring. A swing plate is provided at the end of the swing arm away from the rotating ring, and two guide wheels are rotatably connected to the side of the swing plate away from the swing arm. The two guide wheels are vertically opposite each other, and annular guide grooves are provided on the arc-shaped surfaces of the two guide wheels. The guide grooves are coaxial with the guide wheels. One end of the plastic tube passes between the two guide wheels. At this time, the plastic tube is located in the guide grooves of the two guide wheels. When the rotating column rotates, so that the bending rod bends the clamped plastic tube through the two bending wheels, the movement of the plastic tube itself will drag the two guide wheels, so that the swing plate and the swing arm drive the rotating ring to rotate in the same direction on the rotating column.

[0017] Preferably, the fixed plate is provided with a first cylinder, and one end of the piston rod of the first cylinder is provided with a push plate. The push plate is provided with a cutting blade. The mounting plate is provided with a side groove on the side away from the fixed plate, and the side groove is connected to the connecting groove. One end of the cutting blade is located in the side groove and on one side of the connecting groove. The two bending wheels are brought closer to or further away from each other along the length direction of the side groove by pneumatic grippers.

[0018] Preferably, the sliding mechanism includes a U-shaped mounting bracket and a second cylinder mounted on the mounting bracket. The mounting bracket is used to connect the first sliding plate and the second sliding plate, and one end of the piston rod of the second cylinder is fixedly connected to the turntable.

[0019] The beneficial effects of this invention are as follows: by pushing the mechanism, the two bending wheels are brought closer together, thereby clamping the plastic tube. Then, the bending mechanism bends the plastic tube clamped by the two bending wheels. After bending, the first cooling element and the second cooling element air-cool the outer walls of the bent part of the plastic tube to fix its shape. In the above process, by air-cooling the outer walls of the bent part of the plastic tube, the cooling efficiency can be improved, thereby reducing the occurrence of springback of the plastic tube. It is simple and convenient to use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0022] Figure 2 This is a schematic diagram illustrating the structure of the air blowing plate in this embodiment;

[0023] Figure 3 This is a schematic diagram illustrating the structure of the swing arm in this embodiment;

[0024] Figure 4 This is a structural schematic diagram illustrating the fixing plate in this embodiment;

[0025] Figure 5 This is a schematic diagram illustrating the structure of the bending wheel in this embodiment;

[0026] Figure 6 This is a schematic diagram illustrating the structure of the second sliding plate in this embodiment;

[0027] Figure 7 for Figure 6 A magnified structural diagram of section B.

[0028] Explanation of reference numerals in the attached figures:

[0029] In the diagram: 1. Discharge cylinder; 2. Turntable; 21. First pulley; 22. Slide rail; 23. First slide plate; 231. Bending motor; 232. Eccentric coupling; 233. Rotary column; 2331. Rotary ring; 2332. Swing arm; 2333. Swing plate; 2334. Guide wheel; 2335. Guide groove; 234. Positioning shaft; 2341. Second air blowing hole; 235. Vertical plate; 236. Bending rod; 24. Second slide plate; 241. Fixed plate; 2411. First cylinder; 24 12. Push plate; 2413. Cutting blade; 242. Mounting plate; 2421. Side groove; 243. Connecting groove; 244. Suspension plate; 245. Pneumatic gripper; 246. Side plate; 2461. Air inlet pipe; 247. Horizontal plate; 2471. Guide tube; 248. Air blowing plate; 249. First air blowing hole; 3. Bending wheel; 31. Slide seat; 32. Side groove; 33. Circular groove; 4. Servo motor; 41. Second pulley; 42. Transmission belt; 5. Mounting bracket; 51. Second cylinder. Detailed Implementation

[0030] 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.

[0031] A plastic tube shaping machine head structure includes a heating box (not shown in the figure) for heating the plastic tube and a discharge cylinder 1 disposed on one side of the heating box, such as... Figure 1 The discharge cylinder 1 is rotatably connected to a turntable 2 via a rotating mechanism, and the turntable 2 is provided with two semi-circular bending wheels 3. One end of the plastic tube passes through the discharge cylinder 1 and is located between the two bending wheels 3. The turntable 2 is provided with a pushing mechanism for driving the two bending wheels 3 to move closer or further apart.

[0032] It also includes a bending mechanism set on the turntable 2 and cooperating with two bending wheels 3. When the pushing mechanism drives the two bending wheels 3 to approach each other, the two bending wheels 3 cooperate to clamp the plastic tube. At this time, the bending mechanism is used to bend the clamped plastic tube through the two bending wheels 3.

[0033] It also includes an air-cooling mechanism set on the turntable 2. The air-cooling mechanism includes a first cooling component and a second cooling component. The first cooling component and the second cooling component are located on opposite sides of the outer wall of the bent plastic tube and air-cool the plastic tube.

[0034] like Figure 1 The two bending wheels 3 are brought closer together by the pushing mechanism, thereby clamping the plastic tube. Then, the bending mechanism bends the plastic tube clamped by the two bending wheels 3. After bending, the outer walls of the bent part of the plastic tube are cooled by the first and second cooling components to fix its shape. In the above process, by cooling the outer walls of the bent part of the plastic tube by air, the cooling efficiency can be improved, thereby reducing the occurrence of springback of the plastic tube. It is simple and convenient to use.

[0035] like Figure 1 The rotating mechanism includes a first pulley 21 mounted on the turntable 2, and the first pulley 21 is coaxial with the discharge cylinder 1. The turntable 2 is rotatably connected to the discharge cylinder 1. The heating box is equipped with a servo motor 4, and one end of the rotating shaft of the servo motor 4 is equipped with a second pulley 41. The first pulley 21 and the second pulley 41 are connected by a transmission belt 42.

[0036] like Figure 1 and Figure 2 and Figure 3The turntable 2 is equipped with two slide rails 22, which are located on both sides of the discharge cylinder 1. A first slide plate 23 and a second slide plate 24 are slidably connected to the two slide rails 22. The turntable 2 is equipped with a sliding mechanism for simultaneously pushing the first slide plate 23 and the second slide plate 24 to slide away from or towards the turntable 2 on the slide rails 22. The pushing mechanism, two bending wheels 3, and the air cooling mechanism are all located on the second slide plate 24, and the bending mechanism is located on the first slide plate 23. After completing one bend, the sliding mechanism simultaneously pushes the first slide plate 23 and the second slide plate 24 away from the turntable 2 on the slide rails 22. The plastic tube is pulled forward as it slides in the direction of the discharge cylinder 1. The plastic tube gradually moves out of the heating box until the plastic tube of the required size for the next bend is removed from the discharge cylinder 1. Then the two bending wheels 3 move away from each other and release the clamping of the plastic tube. Then the sliding mechanism simultaneously pushes the first slide plate 23 and the second slide plate 24 to slide back to their original positions on the slide rail 22 towards the turntable 2. Then the second bend is performed. Through the above process, the plastic tube can be extended to the required size when the next bend is performed. By repeating this process, the bending of the plastic tube can be completed.

[0037] The rotating mechanism drives the turntable 2 to rotate, and the pushing mechanism, bending mechanism, air cooling mechanism, first slide plate 23, second slide plate 24, and two bending wheels 3 all follow the turntable 2 to rotate along the axis of the turntable 2. At this time, the bending direction of the bending mechanism and the two bending wheels 3 on the plastic tube can be adjusted.

[0038] like Figure 1 and Figure 2 and Figure 4The second slide plate 24 has a fixed plate 241 at the end away from the turntable 2, and the fixed plate 241 is located at the opening of the discharge cylinder 1. A mounting plate 242 is provided on the side of the fixed plate 241 away from the discharge cylinder 1. A connecting groove 243 is provided on the mounting plate 242, penetrating the fixed plate 241, and the connecting groove 243 corresponds to the opening of the discharge cylinder 1. Each of the two bending wheels 3 has a sliding seat 31, and both sliding seats 31 are horizontally slidably connected to the side of the mounting plate 242 away from the fixed plate 241. The sides of the two sliding seats 31 that are close to each other each have an arc-shaped side groove 32 that mates with the connecting groove 243, and the side groove 32 is configured to mate with the bending wheel 3. One end of the plastic tube connects to the two wheels through the connecting groove 243. The tube passes through the side groove 32. The pushing mechanism includes a suspension plate 244 set at the top of the fixed plate 241, and the bottom end of the suspension plate 244 is provided with a pneumatic gripper 245 for driving the two bending wheels 3 to move closer to each other. By activating the pneumatic gripper 245, the two moving ends of the pneumatic gripper 245 drive the two bending wheels 3 to move closer to each other, thereby making the two slides 31 move closer to each other. At this time, the plastic tube is clamped by the side groove 32 on the slide 31, and then the plastic tube is bent by the bending mechanism and the two bending wheels 3. When the plastic tube is clamped by the side groove 32 on the slide 31, both bending wheels 3 are in contact with the outer wall of the plastic tube. The slide 31 and the bending wheels 3 are integrally set.

[0039] Both the pneumatic gripper 245 and the moving end on the pneumatic gripper 245 are existing structures, and will not be described in detail here.

[0040] like Figure 1 and Figure 3 and Figure 6 and Figure 7 The bending mechanism includes a bending motor 231 mounted on the first sliding plate 23. One end of the rotating shaft of the bending motor 231 is connected to a rotating column 233 via an eccentric coupling 232. One end of the rotating column 233 is coaxially connected to a positioning shaft 234. Both bending wheels 3 have coaxially formed circular grooves 33. The end of the positioning shaft 234, away from the rotating column 233, is coaxially inserted into the two circular grooves 33. The rotating column 233 is equipped with a vertical plate 235, and the vertical plate 235 is equipped with bending rods 236 that cooperate with the two bending wheels 3. Between the two bending wheels 3... The plastic tube is located below the bending rod 236. When the bending motor 231 is turned on, the rotating shaft of the bending motor 231 drives the rotating column 233 to rotate through the eccentric coupling 232. The rotating column 233 drives the positioning shaft 234 to rotate. When the rotating column 233 rotates, the rotating column 233 drives the bending rod 236 to rotate along the rotation axis of the rotating column 233 through the upright plate 235. At this time, the bending rod 236 will bend the plastic tube through the two bending wheels 3. The eccentric coupling 232 is an existing structure and will not be described in detail here.

[0041] like Figure 1 and Figure 2 and Figure 4 and Figure 5 The first cooling component includes an L-shaped side plate 246 disposed on the side of the suspension plate 244 near the first sliding plate 23, with a horizontal plate 247 horizontally disposed at the bottom end of the side plate 246, and an air blowing plate 248 inclinedly disposed at the end of the horizontal plate 247 away from the side plate 246. The side plate 246, the horizontal plate 247, and the air blowing plate 248 are hollow and interconnected. The air blowing plate 248 is located above the space between the two bending wheels 3, and is provided with an opening on the air blowing plate 248 to blow air through the plastic tube between the two bending wheels 3. The first air blowing hole 249 and the side plate 246 are provided with an air inlet pipe 2461, which is connected to an external air source. When it is necessary to cool the bent plastic tube, air is blown into the air blowing plate 248 through the air inlet pipe 2461, the side plate 246 and the horizontal plate 247 in sequence through the external air source. At this time, the air in the air blowing plate 248 will be blown from the first air blowing hole 249 to the outer wall of the bent plastic tube between the two bending wheels 3, thereby cooling the plastic tube.

[0042] like Figure 2 and Figure 4 and Figure 5 and Figure 7 The second cooling component includes a conduit 2471 disposed at the end of the horizontal plate 247 away from the side plate 246. The positioning shaft 234 is hollow inside. The end of the conduit 2471 away from the horizontal plate 247 is connected to the positioning shaft 234. The conduit 2471 and the positioning shaft 234 are rotatably connected. The positioning shaft 234 has a second air blowing hole 2341 for blowing air through the plastic tube between the two bending wheels 3. The second air blowing hole 2341 corresponds to the two bending wheels 3. When air enters the horizontal plate 247, a portion of the air will enter the positioning shaft 234 from the conduit 2471, and then flow from the positioning shaft 234. The second air hole 2341 blows air onto the outer wall of the bent plastic tube between the two bending wheels 3. By blowing air through the first air hole 249 and the second air hole 2341 to cool the outer walls of the bent part of the plastic tube, the cooling efficiency can be improved, thereby reducing the occurrence of springback in the plastic tube. When the two bending wheels 3 approach each other and clamp the plastic tube through the side grooves 32 on the two slides 31, there is a gap between the two slides 31 and the two bending wheels 3. The air blown out by the second air hole 2341 blows from the gap between the two slides 31 and the two bending wheels 3 onto the bent plastic tube, which is simple and convenient to use.

[0043] like Figure 1 and Figure 3The rotating column 233 is equipped with a stabilizing mechanism to reduce the bending of the plastic tube due to swaying. The stabilizing mechanism includes a rotating ring 2331 coaxially rotatably connected to the rotating column 233, and an L-shaped swing arm 2332 on the outer wall of the rotating ring 2331. A swing plate 2333 is provided at the end of the swing arm 2332 away from the rotating ring 2331, and two guide wheels 2334 are rotatably connected to the side of the swing plate 2333 away from the swing arm 2332. The two guide wheels 2334 are vertically opposite each other, and each of the arc surfaces of the two guide wheels 2334 is provided with a ring. The guide groove 2335 is shaped and coaxial with the guide wheel 2334. One end of the plastic tube passes between the two guide wheels 2334. At this time, the plastic tube is located in the guide groove 2335 of the two guide wheels 2334. When the rotating column 233 rotates, the bending rod 236 bends the clamped plastic tube through the two bending wheels 3. The bending motion of the plastic tube itself will drag the two guide wheels 2334, so that the rotating ring 2331 will rotate in the same direction on the rotating column 233 through the swing plate 2333 and the swing arm 2332.

[0044] After one bend is completed, the rotating column 233 rotates in the opposite direction, causing the bending rod 236 to return to its original position. At this time, the rotating ring 2331 will not rotate with the rotating column 233. Then, through the sliding mechanism, the first sliding plate 23 and the second sliding plate 24 are pushed to slide away from the turntable 2 on the slide rail 22. This causes the two sliding blocks 31 to be pulled forward by the plastic tube held by the side groove 32. After the plastic tube moves a suitable distance, the two bending wheels 3 move away from each other and release the clamping of the plastic tube. Then, the sliding mechanism pushes the first sliding plate 23 and the second sliding plate 24 to slide back to their original position on the slide rail 22 towards the turntable 2. During this process, the two guide wheels 2334 will roll along the bent plastic tube until both guide wheels 2334 roll to the horizontal end of the plastic tube. Then, the rotating mechanism drives the turntable 2 to rotate, adjusting the direction required for the next bend. After the adjustment is completed, the second bend is performed, and so on, to complete the bending of the plastic tube.

[0045] When turntable 2 rotates, the rotating column 233, rotating ring 2331, swing arm 2332, swing plate 2333, and two guide wheels 2334 will rotate along the rotation axis of turntable 2. The direction required for the next bend is offset from the direction of the previous bend. For example, if the first bend is downward, the second bend will be in the direction other than downward and upward. Or, if the first bend is to the left, the second bend will be in the direction other than left and right.

[0046] When the bending direction is downward, the head of the plastic tube will sway up and down due to the bending. However, when the turntable 2 rotates so that the next bending direction is any of the remaining directions other than downward and upward, the swaying plastic tube will not be able to drive the rotating ring 2331 to rotate on the rotating column 233 through the guide wheel 2334, the swing plate 2333, and the swing arm 2332. At this time, the two guide wheels 2334 can reduce the impact of the plastic tube swaying on the bending of the plastic tube, making it simple and convenient to use.

[0047] like Figure 2 and Figure 4 and Figure 5 A first cylinder 2411 is provided on the fixed plate 241, and a push plate 2412 is provided at one end of the piston rod of the first cylinder 2411. A cutting blade 2413 is provided on the push plate 2412. A side groove 2421 is provided on the side of the mounting plate 242 away from the fixed plate 241, and the side groove 2421 is connected to the connecting groove 243. One end of the cutting blade 2413 is located in the side groove 2421 and on one side of the connecting groove 243. Two bending wheels 3 move closer or further away from each other along the length direction of the side groove 2421 through pneumatic grippers 245. After the plastic tube completes the required bending, the piston rod of the first cylinder 2411 will push the cutting blade 2413 closer to the plastic tube through the push plate 2412 to cut the plastic tube in the connecting groove 243 by opening the first cylinder 2411.

[0048] like Figure 1 The sliding mechanism includes a U-shaped mounting bracket 5 and a second cylinder 51 mounted on the mounting bracket 5. The mounting bracket 5 is used to connect the first slide plate 23 and the second slide plate 24. One end of the piston rod of the second cylinder 51 is fixedly connected to the turntable 2. When the second cylinder 51 is opened, since the piston rod of the second cylinder 51 is fixedly connected to the turntable 2 and the second cylinder 51 is mounted on the mounting bracket 5, the mounting bracket 5 will move away from or towards the turntable 2 through the second cylinder 51. At this time, the mounting bracket 5 will simultaneously drive the first slide plate 23 and the second slide plate 24 to move away from or towards the turntable 2.

[0049] The procedure for using this device is as follows:

[0050] The first step is to start the pneumatic gripper 245. The two moving ends of the pneumatic gripper 245 drive the two bending wheels 3 to move closer to each other, so that the side grooves 32 on the two slides 31 clamp the plastic tube.

[0051] The second step is to turn on the bending motor 231. The rotating shaft of the bending motor 231 drives the rotating column 233 to rotate through the eccentric coupling 232. The rotating column 233 drives the positioning shaft 234 to rotate. When the rotating column 233 rotates, the rotating column 233 drives the bending rod 236 to rotate along the rotation axis of the rotating column 233 through the upright plate 235. At this time, the bending rod 236 will bend the plastic tube once through the two bending wheels 3. At this time, the bending motion of the plastic tube itself will drag the two guide wheels 2334, so that the swing plate 2333 and the swing arm 2332 drive the rotating ring 2331 to rotate in the same direction on the rotating column 233.

[0052] The third step involves blowing air into the air-blowing plate 248 after the first bend, via an external air source through the air inlet pipe 2461, side plate 246, and horizontal plate 247. The air in the air-blowing plate 248 then blows through the first air-blowing hole 249 towards the outer wall of the bent plastic tube between the two bending wheels 3. As the air enters the horizontal plate 247, some air enters the positioning shaft 234 through the guide tube 2471, and then blows air through the second air-blowing hole 2341 on the positioning shaft 234 onto the outer wall of the bent plastic tube between the two bending wheels 3. This process, through the first and second air-blowing holes 249 and 2341, cools both sides of the bent portion of the plastic tube. After cooling, the bending motor 231 rotates in the opposite direction, causing the bending rod 236 to return to its original position (e.g., ...). Figure 1 The second cylinder 51 is opened, causing the mounting bracket 5 to simultaneously move the first slide plate 23 and the second slide plate 24 away from the turntable 2 until they move the required distance, thereby pulling the plastic tube size required for the next bend out from the discharge cylinder 1.

[0053] In the fourth step, the two moving ends of the pneumatic gripper 245 drive the two bending wheels 3 to move away from each other to release the clamping of the plastic tube by the upper grooves 32 of the two slides 31.

[0054] Fifth step, by means of the second cylinder 51, the mounting bracket 5 simultaneously drives the first slide plate 23 and the second slide plate 24 to slide back to their original positions in the direction closer to the turntable 2. During this process, the two guide wheels 2334 will roll along the curved plastic tube until both guide wheels 2334 roll to the horizontal end of the plastic tube.

[0055] Step 6: Turn on the servo motor 4. The rotating shaft of the servo motor 4 drives the second pulley 41 to rotate. The second pulley 41 drives the first pulley 21 to rotate through the transmission belt 42. The first pulley 21 drives the turntable 2 to rotate. At this time, the first slide plate 23, the second slide plate 24, the bending motor 231, the rotating column 233, the swing plate 2333, the swing arm 2332, the rotating column 233, the fixed plate 241, the bending rod 236, the two guide wheels 2334, and the bending wheel 3 will follow the turntable 2 to rotate, adjusting the bending direction required for the next plastic tube.

[0056] After the required bending direction is adjusted, repeat steps one through six above to bend the plastic tube multiple times in multiple directions. After the plastic tube completes the last required bend, start the first cylinder 2411. The piston rod of the first cylinder 2411 pushes the cutting blade 2413 close to the plastic tube through the push plate 2412 to cut the plastic tube in the connecting groove 243.

[0057] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A plastic tube shaping machine head structure, comprising a heating box for heating the plastic tube and a discharge cylinder (1) disposed on one side of the heating box, characterized in that, The discharge cylinder (1) is rotatably connected to a turntable (2) via a rotating mechanism, and the turntable (2) is provided with two semi-circular bending wheels (3). One end of the plastic tube passes through the discharge cylinder (1) and is located between the two bending wheels (3). The turntable (2) is provided with a pushing mechanism for driving the two bending wheels (3) to move closer or further apart. It also includes a bending mechanism set on the turntable (2) and cooperating with two bending wheels (3). When the pushing mechanism drives the two bending wheels (3) to approach each other, the two bending wheels (3) cooperate to clamp the plastic tube. At this time, the bending mechanism is used to bend the clamped plastic tube by the two bending wheels (3). It also includes a wind-cooling mechanism set on the turntable (2), the wind-cooling mechanism including a first cooling component and a second cooling component, the first cooling component and the second cooling component are respectively located on opposite sides of the outer wall of the bent plastic tube and wind-cool the plastic tube; The turntable (2) is provided with two slide rails (22), and the two slide rails (22) are located on both sides of the discharge cylinder (1). The two slide rails (22) are slidably connected with a first slide plate (23) and a second slide plate (24). The turntable (2) is provided with a sliding mechanism for simultaneously pushing the first slide plate (23) and the second slide plate (24) to slide away from or towards the turntable (2) on the slide rails (22). The pushing mechanism, the two bending wheels (3), and the air cooling mechanism are all set on the second slide plate (24), and the bending mechanism is set on the first slide plate (23). The bending mechanism includes a bending motor (231) mounted on the first slide plate (23), and one end of the rotating shaft of the bending motor (231) is provided with a rotating column (233) via an eccentric coupling (232). The rotating column (233) is provided with a stabilizing mechanism to reduce the impact of plastic tube shaking on the bending of the plastic tube. The stabilizing mechanism includes a rotating ring (2331) coaxially rotatably connected to a rotating column (233). An L-shaped swing arm (2332) is provided on the outer wall of the rotating ring (2331). A swing plate (2333) is provided at the end of the swing arm (2332) away from the rotating ring (2331). Two guide wheels (2334) are rotatably connected to the side of the swing plate (2333) away from the swing arm (2332). The two guide wheels (2334) are vertically opposite each other. Each of the arc-shaped surfaces of the two guide wheels (2334) is provided with an annular guide groove (2335). The groove (2335) is coaxial with the guide wheel (2334). One end of the plastic tube passes between the two guide wheels (2334). At this time, the plastic tube is located in the guide groove (2335) of the two guide wheels (2334). When the rotating column (233) rotates, the bending rod (236) bends the clamped plastic tube through the two bending wheels (3). The movement of the plastic tube itself will drag the two guide wheels (2334), so that the rotating ring (2331) will rotate in the same direction on the rotating column (233) through the swing plate (2333) and the swing arm (2332).

2. The plastic tube shaping head structure as described in claim 1, characterized in that, The second slide plate (24) has a fixed plate (241) at one end away from the turntable (2), and the fixed plate (241) is located at the opening of the discharge cylinder (1). The fixed plate (241) has an mounting plate (242) on the side away from the discharge cylinder (1). The mounting plate (242) has a through groove (243) that passes through the fixed plate (241), and the through groove (243) corresponds to the opening of the discharge cylinder (1). Both bending wheels (3) are provided with sliding seats (31), and both sliding seats (31) are horizontally slidably connected to the mounting plate. The mounting plate (242) is located away from the fixed plate (241). The two slides (31) are provided with arc-shaped side grooves (32) that cooperate with the connecting groove (243) on the side that are close to each other. The side grooves (32) are also provided with bending wheels (3). One end of the plastic tube passes through the connecting groove (243) and the two side grooves (32). The pushing mechanism includes a suspension plate (244) set at the top of the fixed plate (241). The bottom end of the suspension plate (244) is provided with a pneumatic gripper (245) for driving the two bending wheels (3) to approach each other.

3. The plastic tube shaping head structure as described in claim 2, characterized in that, One end of the rotating column (233) is coaxially provided with a positioning shaft (234), and both bending wheels (3) are coaxially provided with circular grooves (33). The end of the positioning shaft (234) away from the rotating column (233) is coaxially inserted into the two circular grooves (33). The rotating column (233) is provided with a vertical plate (235), and the vertical plate (235) is provided with a bending rod (236) that cooperates with the two bending wheels (3). The plastic tube between the two bending wheels (3) is located below the bending rod (236). When the rotating column (233) rotates, the bending rod (236) is used to bend the plastic tube through the two bending wheels (3).

4. The plastic tube shaping head structure as described in claim 3, characterized in that, The first cooling component includes an L-shaped side plate (246) disposed on the side of the suspension plate (244) near the first sliding plate (23), and a horizontal plate (247) is horizontally disposed at the bottom end of the side plate (246). An air blowing plate (248) is inclinedly disposed at the end of the horizontal plate (247) away from the side plate (246). The side plate (246), the horizontal plate (247), and the air blowing plate (248) are hollow inside and interconnected. The air blowing plate (248) is located above the two bending wheels (3), and a first air blowing hole (249) is opened on the air blowing plate (248) to blow air into the plastic tube between the two bending wheels (3). An air inlet pipe (2461) is provided on the side plate (246).

5. The plastic tube shaping head structure as described in claim 4, characterized in that, The second cooling component includes a conduit (2471) disposed at one end of the horizontal plate (247) away from the side plate (246). The positioning shaft (234) is hollow inside. The end of the conduit (2471) away from the horizontal plate (247) is connected to the positioning shaft (234). The conduit (2471) is rotatably connected to the positioning shaft (234). The positioning shaft (234) is provided with a second air blowing hole (2341) for blowing air into the plastic tube between the two bending wheels (3). The second air blowing hole (2341) corresponds to the two bending wheels (3).

6. The plastic tube shaping head structure as described in claim 2, characterized in that, The fixed plate (241) is provided with a first cylinder (2411), and the piston rod of the first cylinder (2411) is provided with a push plate (2412) at one end. The push plate (2412) is provided with a cutting blade (2413). The mounting plate (242) is provided with a side groove (2421) on the side away from the fixed plate (241), and the side groove (2421) is connected to the connecting groove (243). One end of the cutting blade (2413) is located in the side groove (2421) and on one side of the connecting groove (243). The two bending wheels (3) are moved closer or further away from each other along the length direction of the side groove (2421) by a pneumatic gripper (245).

7. The plastic tube shaping head structure as described in claim 1, characterized in that, The sliding mechanism includes a U-shaped mounting bracket (5) and a second cylinder (51) mounted on the mounting bracket (5). The mounting bracket (5) is used to connect the first slide plate (23) and the second slide plate (24). One end of the piston rod of the second cylinder (51) is fixedly connected to the turntable (2).

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