A high-density HDPE pipe forming device and method thereof

Abstract

The present invention relates to the field of HDPE pipe forming technology, and in particular to a high-density HDPE pipe forming device and method thereof. The present invention provides a high-density HDPE pipe forming device, comprising a base, an injection module, a forming module, an electric push rod, a motor and a screw rod, wherein the left side of the top of the base is fixedly connected to the forming module, the right side of the top of the base is slidably connected to the injection module via a slide rail, a motor is installed on the right side of the injection module via a bracket, a screw rod is connected to the motor output shaft, and the screw rod is rotatably arranged inside the injection module. The dual cooling system consisting of an external cooling pipe and an internal cooling pipe-nozzle is used to achieve synchronous cooling of the inner and outer walls of the HDPE pipe. The external cooling pipe circulates coolant to cool the outer periphery of the pipe, and the internal cooling pipe sprays the coolant evenly onto the inner wall through the nozzle, effectively avoiding problems such as internal stress concentration and deformation of the pipe caused by uneven cooling, significantly improving the dimensional accuracy, mechanical properties and surface quality of the pipe, and extending the service life of the pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of HDPE pipe forming, and in particular to a high-density HDPE pipe forming device and method. Background Art

[0002] In modern industrial production, high-density polyethylene (HDPE) pipes are widely used in municipal water supply and drainage, gas transmission, agricultural irrigation, industrial fluid transportation, and other fields due to their excellent chemical resistance, high abrasion resistance, good resistance to environmental stress cracking, and long service life. As market requirements for HDPE pipe quality and performance continue to increase, the cooling process during the pipe forming process has become a key factor affecting product quality.

[0003] Currently, traditional HDPE pipe forming equipment mostly uses a single external cooling method, cooling the outer wall of the pipe through an external cooling pipe. This cooling method has significant drawbacks: because heat from the pipe's interior is difficult to dissipate quickly, the cooling rate inside and outside the pipe is inconsistent, resulting in a large temperature gradient. Research has shown that when the temperature difference between the inside and outside of the pipe exceeds 15°C, significant residual stress will be generated inside the pipe, leading to quality problems such as deformation and warping. Furthermore, uneven cooling can lead to uneven distribution of crystallinity in the pipe, reducing the pipe's tensile strength and impact resistance.

[0004] Therefore, it is of great practical significance to develop a HDPE pipe forming device that can achieve uniform cooling inside and outside the pipe and improve product quality. Summary of the Invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention provides a high-density HDPE pipe forming device and method.

[0006] The technical implementation scheme of the present invention is: a high-density HDPE pipe forming device, including a base, an injection module, a molding module, an electric push rod, a motor and a screw rod. The molding module is fixedly connected to the left side of the top of the base, and the injection module is slidably connected to the right side of the top of the base through a slide rail. The motor is installed on the right side of the injection module through a bracket, and the motor output shaft is connected to the screw rod, which is rotatably arranged inside the injection module. An electric push rod is installed on the right side of the top of the base, and the telescopic rod of the electric push rod is connected to the bottom of the injection module. It also includes a butt joint pipe, an inner cooling pipe, a conveying pipe, a nozzle, an outer cooling pipe and a water supply component. The left end of the screw rod is rotatably connected to the butt joint pipe, the two are interconnected, and the right side of the molding module is connected to the inner cooling pipe through the bracket. The inner cooling pipe is located inside the molding module, the conveying pipe is connected inside the screw rod, and the nozzle is rotatably connected inside the inner cooling pipe. A water supply component is provided at the right end of the screw rod, and the outer and inner sides of the molding module are connected in a surrounding manner with the outer cooling pipe, and the two ends of the outer cooling pipe respectively pass through the outside of the molding module.

[0007] In a preferred embodiment of the present invention, the inner wall of the delivery pipe is coated with a high-temperature resistant coating, which can effectively isolate the heat transfer of the melt in the injection mold.

[0008] In a preferred embodiment of the present invention, the nozzle is designed with multiple holes, and the outlet of the hole is designed to be an outward-expanding trumpet shape.

[0009] In a preferred embodiment of the present invention, the water delivery assembly includes an annular frame, a collar, a connecting pipe, a water outlet pipe and a water inlet pipe. Two collars are connected to the outside of the right end of the spiral rod. The spiral rod parts outside the two collars are respectively rotatably connected to the annular frame. The annular frame and the collar are interconnected. A through hole is opened on the left collar, which passes through the interior of the spiral rod and is used to connect the interior of the left annular frame with the interior of the spiral rod. The right end of the delivery pipe is connected and connected with a connecting pipe. The connecting pipe passes through the spiral rod and is connected to the collar on the right and communicates with the right annular frame. The front side of the left annular frame is connected and connected with the water outlet pipe, and the front side of the right annular frame is connected and connected with the water inlet pipe.

[0010] In a preferred embodiment of the present invention, it also includes a support ring, a sealing block and a return spring. The left end of the delivery pipe and the right end of the nozzle are respectively connected to the support ring, and the sealing blocks are respectively slidably connected to the support rings. The support rings are in close contact with the sealing blocks, and a return spring is connected between the sealing blocks and the support rings. The sealing blocks on both sides are in contact and fit.

[0011] In a preferred embodiment of the present invention, it also includes a docking rod, a support block, a sealing frame and a compression spring. The interior of the docking tube and the right end of the inner cooling tube are respectively connected to the support blocks, the sealing frame is slidably connected to the support block, and a compression spring is provided between the sealing frame and the support block. The interior of the docking tube and the right end of the inner cooling tube are respectively connected to the docking rod at the position on the other side of the support block. The sealing frame is in close contact with the docking rod. The support blocks, docking rods and sealing frames on both sides are respectively rotated with the corresponding delivery pipes and nozzles for sealing, and the sealing frames on both sides are in contact and cooperate.

[0012] In a preferred embodiment of the present invention, it also includes a support base, a horizontal slide rail, a vertical slide rail, a lifting block and a cutter. The support base is connected to the left side of the top of the base, and the support base is located on the left side of the forming module. The horizontal slide rail is symmetrically installed on the top of the support base, and the vertical slide rail is slidably connected to the horizontal slide rail. The lifting block is slidably connected between the two vertical slide rails, and the cutter is installed at the bottom of the lifting block.

[0013] In a preferred embodiment of the present invention, it also includes a follower frame, an inclined plate, a support plate, a clamping plate, a tension spring and a return spring. The outer sides of the two vertical slide rails are slidably connected with inclined plates, and tension springs are connected between the inclined plates and the corresponding vertical slide rails. A follower frame is connected between the right sides of the two inclined plates, and the follower frame abuts against the lifting block to put the tension spring in a stretched state. A support plate is connected to the left side of the vertical slide rail, and a clamping plate is slidably connected to the support plate. Two return springs are connected between the clamping plate and the support plate, and the outer ends of the inclined plate and the clamping plate are in contact and cooperate.

[0014] A method for using a high-density HDPE pipe forming device comprises the following steps:

[0015] S1: First, set up the cooling system. Securely connect the cooling module to the water inlet and outlet pipes of the water delivery component through quick connectors to ensure a smooth coolant circulation path. Connect the ends of the external cooling pipe to the coolant water supply and recovery device respectively. Add HDPE raw material to the injection molding module and start the injection molding module to heat and melt the raw material.

[0016] S2: Start the motor to drive the screw to transport the melt; manually dock the new and old materials, and use the electric push rod to push the injection mold to the left, so that the docking tube and the inner cooling tube can be tightly embedded and connected. At the same time, the nozzle and the delivery tube are precisely engaged, completing the dual docking of the melt delivery channel and the coolant circulation channel;

[0017] S3: The screw rod continuously feeds the material, injecting the molten metal into the molding channel for molding. At the same time, the cooling module starts, and the nozzle sprays coolant on the inner wall of the inner cooling tube. The outer cooling tube cools the outer periphery of the tube simultaneously. The used coolant flows back to the cooling system through the recovery channel and is recycled after cooling treatment.

[0018] S4: When the formed and cooled pipe is output from the discharge end of the forming module, the controller controls the cutter to descend and cut along with the pipe, and the auxiliary clamp is clamped synchronously; after cutting, the cutter resets and the pipe is collected;

[0019] S5: After completing the production task, turn off the motor, injection module and cooling module in sequence, stop the melt delivery and cooling operations, and start the electric push rod to move the injection module right back to its original position, clean the equipment, and prepare for the next production.

[0020] Compared with existing technologies, this invention offers the following advantages: 1. A dual cooling system consisting of an external cooling pipe and an internal cooling pipe-nozzle achieves simultaneous cooling of the inner and outer walls of the HDPE pipe. The external cooling pipe circulates coolant to cool the pipe's periphery, while the internal cooling pipe sprays coolant evenly onto the inner wall through the nozzle. This effectively prevents internal stress concentration and deformation caused by uneven cooling, significantly improving the pipe's dimensional accuracy, mechanical properties, and surface quality, and extending its service life.

[0021] 2. The device adopts a dual-sealed docking structure consisting of a sealing block-reset spring and a sealing frame-compression spring. When the injection module and the molding module are docked, mechanical extrusion is used to achieve channel connectivity and sealing, ensuring a reliable connection between the melt conveying and coolant circulation paths. After the operation is completed, the seal automatically resets to prevent the ingress of external dust and impurities, avoiding raw material contamination and equipment failure, and ensuring the continuity and stability of the production process.

[0022] 3. The cutting assembly synchronizes the cutter with the pipe conveying speed by precisely adjusting the movement of the horizontal and vertical slide rails, achieving automated and precise cutting and avoiding the errors and inefficiencies of manual cutting. The splint automatically clamps the pipe during cutting to ensure its stability, reduce defects such as burrs and uneven cross-sections on the cut surface, and automatically resets after cutting is completed, shortening auxiliary time and significantly improving overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 The figure is a three-dimensional structural diagram of the electric push rod, motor, docking pipe and other components of the present invention.

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the butt joint pipe, inner cooling pipe, spiral rod and other components of the present invention.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the components such as the delivery pipe, nozzle and annular frame of the present invention.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the components such as the collar, connecting pipe and water outlet pipe of the present invention.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the outer cooling tube, the forming module and the inner cooling tube of the present invention.

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the sealing block, support block, butt joint and other components of the present invention.

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the components such as the delivery pipe, support ring and sealing block of the present invention.

[0031] Figure 9 This is a separate diagram of the support ring, sealing block and return spring of the present invention.

[0032] Figure 10 It is a three-dimensional structural diagram of the docking rod, support block, sealing frame and other components of the present invention.

[0033] Figure 11This is a schematic diagram of the present invention showing the docking rod and the sealing frame being out of sealing condition.

[0034] Figure 12 It is a schematic diagram of the three-dimensional structure of the vertical slide rail, lifting block, cutter and other components of the present invention.

[0035] Figure 13 It is a three-dimensional structural diagram of the follower frame, return spring, clamping plate and other components of the present invention.

[0036] Figure 14 It is a schematic diagram of the three-dimensional structure of the follower frame, inclined plate and tension spring of the present invention.

[0037] The above drawings include the following reference numerals: 1, base, 101, injection molding module, 102, molding module, 1021, filling cavity, 103, electric push rod, 104, motor, 105, butt joint, 106, inner cooling pipe, 107, screw rod, 201, delivery pipe, 202, nozzle, 203, annular frame, 204, collar, 205, connecting pipe, 206, water outlet pipe, 207, water inlet pipe, 301, support Support ring, 302, sealing block, 303, return spring, 304, docking rod, 305, support block, 306, sealing frame, 307, compression spring, 401, support seat, 402, horizontal slide rail, 403, vertical slide rail, 404, lifting block, 405, cutter, 501, follow-up frame, 502, inclined plate, 503, support plate, 504, splint, 505, tension spring, 506, return spring, 6, external cooling tube. DETAILED DESCRIPTION

[0038] Example 1: A high-density HDPE pipe forming device, such as Figures 1-6As shown, it includes a base 1, an injection module 101, a molding module 102, an electric push rod 103, a motor 104, a docking tube 105, an inner cooling tube 106, a screw rod 107, a delivery pipe 201, a nozzle 202, an outer cooling tube 6 and a water delivery component. The base 1 provides a stable support foundation for the entire device. The molding module 102 is fixedly connected to the left side of the top of the base 1. The injection module 101 is slidably connected to the right side of the top of the base 1 through a slide rail to achieve left and right movement of the injection module 101. The motor 104 is installed on the right side of the injection module 101 through a bracket. The output shaft of the motor 104 is connected to the screw rod 107. The screw rod 107 is rotatably set inside the injection module 101, and a molten liquid flow passage is formed between the screw rod 107 and the inner wall of the injection module 101. The channel is used to transport the raw material melt after heating and melting. The left end of the screw rod 107 is rotatably connected to the docking pipe 105, and the two are interconnected. The right side of the molding module 102 is connected to the inner cooling pipe 106 through the bracket. The inner cooling pipe 106 is located inside the molding module 102. A pipe molding channel is formed between the outer wall of the inner cooling pipe 106 and the inner wall of the molding module 102. The right side of the channel near the port is a filling cavity 1021. When the molding module 102 is docked with the injection module 101, the melt flowing out of the melt flow channel of the injection module 101 first fills the filling cavity 1021, and then gradually forms and cools in the pipe molding channel to finally form a complete pipe body. The screw rod 107 is connected to the delivery pipe 201, and there is a cavity between the delivery pipe 201 and the inside of the screw rod 107. The inner wall of the delivery pipe 201 is coated with a high-temperature resistant coating, which can effectively isolate the heat transfer of the melt in the injection module 101 and ensure the low temperature of the coolant in the delivery pipe 201. The nozzle 202 is rotatably connected to the inner cooling pipe 106. There is also a chamber between the nozzle 202 and the inner cooling pipe 106. The nozzle 202 adopts a multi-hole design, and the outlet of the hole is designed to be an outward-expanding trumpet shape. This structure can guide the coolant to be dispersed and sprayed at a specific angle, increase the spray coverage area of the coolant, and reduce the resistance of the coolant during spraying, so that the coolant can more smoothly exchange heat with the inner wall of the inner cooling pipe 106, thereby enhancing the cooling performance. The left end of the delivery pipe 201 is provided with two grooves, and the right end of the nozzle 202 is provided with two protrusions. When the injection module 101 drives the delivery pipe When the delivery pipe 201 moves to the left and docks with the nozzle 202, the delivery pipe 201 is tightly connected to the nozzle 202 through the snap-fit cooperation of the protrusion and the groove, and when the delivery pipe 201 rotates with the screw rod 107, it can drive the nozzle 202 to rotate synchronously. A water delivery component is provided at the right end of the screw rod 107. An electric push rod 103 is installed on the right side of the top of the base 1 through a bolt. The telescopic rod of the electric push rod 103 is connected to the bottom of the injection module 101. Through the telescopic action of the electric push rod 103, the left and right movement of the injection module 101 is accurately controlled to achieve the docking and separation of the injection module 101 and the molding module 102. The outer and inner sides of the molding module 102 are surrounded by an external cooling pipe 6. The two ends of the external cooling pipe 6 respectively pass through the outside of the molding module 102.The two ends of the outer cooling pipe 6 are respectively used to connect the coolant water supply device and the coolant recovery device to realize the circulation of the coolant in the outer cooling pipe 6, and the outer cooling pipe 6 is isolated from the pipe forming channel in the forming module 102.

[0039] like Figure 4-Figure 5 As shown, the water delivery assembly includes an annular frame 203, a collar 204, a connecting pipe 205, a water outlet pipe 206 and a water inlet pipe 207. Two collars 204 are connected to the outside of the right end of the spiral rod 107. The parts of the spiral rod 107 outside the two collars 204 are rotatably connected to the annular frame 203. The annular frame 203 and the collar 204 are interconnected. A through hole is opened on the left collar 204, which passes through the interior of the spiral rod 107 for connecting the interior of the left annular frame 203 with the interior of the spiral rod 107, and is not connected to the interior of the delivery pipe 201. The right end of the delivery pipe 201 is connected and connected with the connecting pipe 205. The connecting pipe 205 passes through the spiral rod 107 and is connected to the collar 204 on the right and communicates with the right annular frame 203. The front side of the left annular frame 203 is connected and connected with the water outlet pipe 206, and the front side of the right annular frame 203 is connected and connected with the water inlet pipe 207.

[0040] Before the pipe molding process begins, the cooling system must be fully assembled. Specifically, the cooling module must be securely connected to the water outlet pipe 206 and water inlet pipe 207 of the water delivery assembly. The ends of the external cooling pipe 6 must also be connected to the coolant supply and coolant recovery devices, respectively, to ensure the integrity and sealing of the cooling system. Subsequently, the HDPE raw material is added to the injection molding module 101. The heating function of the injection molding module 101 is activated. By precisely controlling the heating temperature and time, the HDPE raw material is fully melted, transforming into a highly fluid molten state, ready for subsequent transportation and molding processes.

[0041] The motor 104 is started, and the motor 104 outputs power to drive the screw rod 107 to rotate. Under the rotation of the screw rod 107, the molten metal is continuously and stably transported in the molten metal flow channel. At the same time, the rotation of the screw rod 107 drives the conveying pipe 201 connected thereto to rotate synchronously. The rotation of the conveying pipe 201 further drives the rotation of the collar 204 and the connecting pipe 205. Since the annular frame 203 and the collar 204 adopt a rotational matching design, this structure can effectively prevent the rotation of the collar 204 from affecting the connection stability of the water outlet pipe 206 and the water inlet pipe 207 on the annular frame 203, ensuring that the cooling system can operate continuously and stably during the raw material transportation process. Before the processing operation is carried out, the old material in the molding module 102 needs to be connected with the new material in the injection module 101. The screw rod 107 continuously transports the new material to the left. After the operator completes the connection operation of the old and new materials, the electric push rod 103 is started. The telescopic rod of the electric push rod 103 begins to extend, driving the injection module 101 to move to the left until the injection module 101 and the molding module 102 are docked. During the docking process, the docking tube 105 and the inner cooling tube 106 are embedded and connected, and the protrusion on the nozzle 202 is engaged with the groove on the delivery tube 201 to ensure a tight and reliable connection between the two. After the docking is completed, the screw rod 107 continues to rotate. Since the inner cooling tube 106 limits the docking tube 105, the rotation of the screw rod 107 will not drive the docking tube 105 to rotate; the rotation of the delivery tube 201 will drive the nozzle 202 to rotate, and the screw rod 107 will rotate. The rotary rod 107 continuously transports the melt, and the melt first accumulates in the filling cavity 1021. As the melt is continuously pushed, the melt gradually flows in the pipe forming channel and is formed into a tubular structure. While the melt is being formed, the cooling system is synchronously started, and the cooling module injects the coolant into the water inlet pipe 207. Under the action of pressure, the coolant flows through the right annular frame 203, the connecting pipe 205 and the conveying pipe 201 in turn, and finally enters the nozzle 202. The nozzle 202 rotates to evenly spray the coolant on the inner wall of the inner cooling pipe 106. The coolant exchanges heat with the melt in the forming channel to achieve cooling and shaping of the inner periphery of the melt. The used coolant flows to the right in the inner chamber of the inner cooling tube 106, passes through the inner chambers of the butt-joint tube 105 and the screw rod 107, flows into the left annular frame 203 through the through-hole on the left collar 204, and then flows back to the cooling system through the outlet pipe 206 for cooling treatment, thus realizing the recycling of the coolant. At the same time, the coolant water supply device connected to the outer cooling tube 6 is synchronously started to inject the coolant into the outer cooling tube 6. The coolant flows in the outer cooling tube 6 and exchanges heat with the periphery of the forming pipe to achieve cooling of the periphery of the pipe. The heated coolant is recovered by the coolant recovery device, completing the circulation of the coolant, ensuring that the inside and outside of the pipe are cooled uniformly at the same time, effectively reducing the stress concentration inside the pipe, and improving the quality and performance of the pipe, through the synergistic effect of the internal and external cooling systems.

[0042] After the pipe is cooled and formed, it is smoothly discharged from the discharge port on the left end of the forming module 102. The formed HDPE pipe fittings are then segmented and collected to meet different production needs. When the pipe production task is completed, the injection module 101, motor 104, and other related equipment are shut down in sequence, and the delivery of coolant is stopped. The electric push rod 103 is activated, and its telescopic rod retracts, driving the injection module 101 to move rightward along the slide rail to return to its original position. During this movement, the delivery pipe 201 and the nozzle 202 are disconnected, and the docking pipe 105 and the internal cooling pipe 106 are also disconnected, returning the device to its original state and preparing for the next production operation.

[0043] Example 2: Based on Example 1, Figure 7-Figure 9 As shown, it also includes a support ring 301, a sealing block 302 and a return spring 303. The left end of the delivery pipe 201 and the right end of the nozzle 202 are respectively connected to the support ring 301, and the sealing block 302 is slidably connected to the support ring 301. The support ring 301 is in close contact with the sealing block 302, thereby blocking the ports of the delivery pipe 201 and the nozzle 202. A return spring 303 is connected between the sealing block 302 and the support ring 301. When the sealing blocks 302 on both sides contact each other, a mutual squeezing force is generated, causing the sealing block 302 and the corresponding support ring 301 to be out of the sealed state. At this time, the delivery pipe 201 and the nozzle 202 are in a connected state.

[0044] like Figure 7 、 Figure 10 and Figure 11 As shown, it also includes a docking rod 304, a support block 305, a sealing frame 306 and a compression spring 307. The inside of the docking tube 105 and the right end of the inner cooling tube 106 are respectively connected to the support block 305, the sealing frame 306 is slidably connected to the support block 305, and the compression spring 307 is compressed between the sealing frame 306 and the support block 305. The inside of the docking tube 105 and the right end of the inner cooling tube 106 are located on the other side of the support block 305. The docking rod 304 is connected to the inside of the docking tube 105 and the right end of the inner cooling tube 106 are located on the other side of the support block 305. The sealing frame 306 is in close contact with the docking rod 304. , so that the chamber between the docking tube 105 and the spiral rod 107 and the delivery pipe 201 is in a sealed state, and the chamber between the inner cooling tube 106 and the nozzle 202 is also in a sealed state. The support blocks 305, docking rods 304 and sealing frames 306 on both sides are respectively sealed and rotated with the corresponding delivery pipe 201 and nozzle 202. When the sealing frames 306 on both sides approach each other, they will squeeze each other, causing the sealing frames 306 and the docking rods 304 to break away from the sealed state. At this time, the originally sealed chambers on both sides are in a connected state.

[0045] In the initial state, the chamber between the screw 107 and the delivery tube 201, as well as the chamber inside the delivery tube 201, are both sealed. Similarly, the chamber between the internal cooling tube 106 and the nozzle 202, as well as the chamber inside the nozzle 202, are also sealed. This sealing design effectively prevents the entry of external impurities, ensuring the cleanliness of the device and the purity of the coolant. After the newly formed material in the injection module 101 is docked with the old material reserved in the molding module 102, the molding module 102 moves to the left, driven by the electric push rod 103, and gradually approaches the injection module 101. During this process, the butt joint 105 and the delivery pipe 201 gradually approach the inner cooling pipe 106. When the sealing blocks 302 on both sides contact each other, as the forming module 102 continues to move, the sealing blocks 302 squeeze each other and move outward, and the return spring 303 is compressed. At this time, the sealing block 302 and the support ring 301 no longer maintain a sealed state, and the delivery pipe 201 is connected with the nozzle 202. At the same time, the sealing frames 306 on both sides also contact each other and are also squeezed and move outward. The sealing frame 306 and the butt joint rod 304 are out of the sealed state, the compression spring 307 is compressed, and the butt joint 105 is connected with the inner cooling pipe 106. When the delivery pipe 201 is connected with the nozzle 202, and the butt joint 105 is connected with the inner cooling pipe 106 Afterwards, the coolant in the delivery pipe 201 is transported to the left side, enters the nozzle 202, and is evenly sprayed by the nozzle 202 to the inner wall of the inner cooling pipe 106. The coolant exchanges heat with the formed tube body to cool the tube body. When the operation is completed and the injection module 101 is separated from the molding module 102, the sealing blocks 302 on both sides are disengaged from each other, and the reset spring 303 releases elastic potential energy, rebounds and resets, driving the sealing block 302 to move inward and reset, and then re-tightly abut against the support ring 301 to restore the sealing state. At the same time, the sealing frames 306 on both sides are disengaged from each other, and the compression spring 307 rebounds and resets, driving the sealing frame 306 to move inward and reset, and then re-tightly abut against the docking rod 304 to restore the sealing state. This sealing reset mechanism can ensure the sealing of each channel of the device, effectively prevent the entry of impurities such as external dust, extend the service life of the device, and ensure the stable operation of the device.

[0046] like Figure 12As shown, it also includes a support base 401, a horizontal slide rail 402, a vertical slide rail 403, a lifting block 404 and a cutter 405. The left side of the top of the base 1 is connected to the support base 401 by bolts. The support base 401 is located on the left side of the forming module 102. The top of the support base 401 is symmetrically installed with a horizontal slide rail 402 by bolts. The vertical slide rail 403 is slidably connected to the horizontal slide rail 402. The lifting block 404 is slidably connected between the two vertical slide rails 403. The cutter 405 is detachably installed at the bottom of the lifting block 404. By adjusting the speed of the horizontal slide rail 402 to keep it consistent with the pipe forming speed, and cutting according to the required pipe strip The speed of the vertical slide 403 is controlled to adjust the cutting length. When the formed and cooled pipe is output to the left through the discharge end of the forming module 102, on the one hand, the vertical slide 403 is controlled to drive the lifting block 404 and the cutter 405 downward, so that the cutter 405 can cut the pipe. On the other hand, as the cutter 405 moves downward, the transverse slide 402 drives the vertical slide 403, the lifting block 404, and the cutter 405 to move to the left as a whole at a speed consistent with the pipe conveying speed. This synchronized movement ensures that the cut surface of the cutter 405 is neat when cutting the pipe, while also accommodating the continuous output of the pipe. After the cutting is completed, the vertical slide 403 drives the lifting block 404 and the cutter 405 upward, while the transverse slide 402 drives the vertical slide 403, the lifting block 404, and the cutter 405 to move back to the right, ready for the next cut.

[0047] like Figure 13 and Figure 14 As shown, it also includes a follower frame 501, an inclined plate 502, a support plate 503, a clamping plate 504, a tension spring 505 and a return spring 506. The outer sides of the two vertical slide rails 403 are slidably connected with the inclined plates 502, and the inclined plates 502 and the corresponding vertical slide rails 403 are connected with tension springs 505. The follower frame 501 is connected between the right sides of the two inclined plates 502, and the follower frame 501 abuts against the lifting block 404, so that the tension spring 505 is in a stretched state. The left side of the vertical slide rail 403 is connected with the support plate 503, and the clamping plate 504 is slidably connected to the support plate 503. The front and rear clamping plates 504 are distributed oppositely and fit the shape of the pipe fittings. Two return springs 506 are connected between the clamping plate 504 and the support plate 503, and the outer ends of the inclined plate 502 and the clamping plate 504 are in contact and cooperate.

[0048] When the lifting block 404 drives the cutter 405 to move downward to perform the pipe cutting operation, the lifting block 404 releases the pressure on the follower frame 501, and the tension spring 505 in the stretched state releases the elastic force, driving the follower frame 501 and the inclined plate 502 to move downward. The inclined plate 502 uses its inclined surface structure to push the clamping plate 504 to move inward. At this time, the return spring 506 is compressed, and the clamping plate 504 gradually clamps the pipe to keep the pipe in a horizontal state. This process assists the cutter 405 to cut the pipe accurately. At the same time, the clamping plate 504 will move along the vertical slide rail 4 03 moves to the left to adapt to the movement of the pipe. After cutting, the lifting block 404 drives the cutter 405 to move upward, and at the same time pushes the follower frame 501 to move upward. The follower frame 501 then drives the inclined plate 502 to move upward, and the tension spring 505 is stretched again. The force of the inclined plate 502 on the clamping plate 504 disappears, and the return spring 506 rebounds and resets, driving the clamping plate 504 to move outward to restore to its initial position, waiting for the next cutting operation. This design ensures the stability and accuracy of the cutting process and improves the quality and efficiency of pipe cutting.

[0049] A method for using a high-density HDPE pipe forming device comprises the following steps:

[0050] S1: First, the cooling system is set up. The cooling module is firmly connected to the water inlet pipe 207 and the water outlet pipe 206 of the water delivery component through quick connectors to ensure a smooth coolant circulation path. The two ends of the external cooling pipe 6 are connected to the coolant water supply and recovery device respectively. HDPE raw material is added to the injection module 101 and the injection module 101 is started to heat and melt the raw material.

[0051] S2: Start the motor 104 to drive the screw rod 107 to transport the melt; and manually dock the new and old materials. The electric push rod 103 pushes the injection mold 101 to the left, so that the docking tube 105 and the inner cooling tube 106 are tightly embedded and connected. At the same time, the nozzle 202 and the delivery tube 201 are precisely engaged, completing the dual docking of the melt delivery channel and the coolant circulation channel;

[0052] S3: The screw 107 continuously feeds the material, injecting the melt into the molding channel for molding. At the same time, the cooling module is activated, and the nozzle 202 sprays coolant on the inner wall of the inner cooling tube 106. The outer cooling tube 6 cools the outer periphery of the tube simultaneously. The used coolant flows back to the cooling system through the recovery channel and is recycled after being cooled.

[0053] S4: When the formed and cooled pipe is output from the discharge end of the forming module 102, the controller controls the cutter 405 to descend and cut along with the pipe, and the auxiliary clamping plate 504 is clamped synchronously; after cutting, the cutter 405 is reset and the pipe is collected;

[0054] S5: After completing the production task, turn off the motor 104, injection module 101 and cooling module in sequence, stop the melt conveying and cooling operations, and start the electric push rod 103 to move the injection module 101 right back to its original position, clean the equipment, and prepare for the next production.

Claims

1. A high-density HDPE pipe forming device, comprising a base (1), an injection molding module (101), a molding module (102), an electric push rod (103), a motor (104) and a screw rod (107), wherein the molding module (102) is fixedly connected to the left side of the top of the base (1), the injection molding module (101) is slidably connected to the right side of the top of the base (1) via a slide rail, the motor (104) is mounted on the right side of the injection molding module (101) via a bracket, the screw rod (107) is connected to the output shaft of the motor (104), the screw rod (107) is rotatably arranged inside the injection molding module (101), the electric push rod (103) is mounted on the right side of the top of the base (1), and the telescopic rod of the electric push rod (103) is connected to the bottom of the injection molding module (101), and the device is characterized in that: The invention also includes a butt joint pipe (105), an inner cooling pipe (106), a delivery pipe (201), a nozzle (202), an outer cooling pipe (6) and a water delivery component. The left end of the screw rod (107) is rotatably connected to the butt joint pipe (105), and the two are interconnected. The right side of the molding module (102) is connected to the inner cooling pipe (106) through a bracket. The inner cooling pipe (106) is located inside the molding module (102). The screw rod (107) is connected to the delivery pipe (201). The inner cooling pipe (106) is rotatably connected to the nozzle (202). The screw rod (107) is connected to the delivery pipe (201). 7) A water delivery component is provided at the right end, and the outer and inner sides of the molding module (102) are connected to the outer cooling pipe (6) in a surrounding manner, and the two ends of the outer cooling pipe (6) respectively penetrate the outside of the molding module (102); the water delivery component includes an annular frame (203), a ring (204), a connecting pipe (205), a water outlet pipe (206) and a water inlet pipe (207), and the outer side of the right end of the spiral rod (107) is connected to two rings (204), and the spiral rod (107) parts outside the two rings (204) are respectively rotatably connected to the annular frame (203), and the annular frame (20 3) is interconnected with the collar (204), a through hole is opened on the left collar (204), the through hole passes through the interior of the spiral rod (107), and is used to connect the interior of the left annular frame (203) and the interior of the spiral rod (107). The right end of the delivery pipe (201) is connected and connected with a connecting pipe (205), which passes through the spiral rod (107) and is connected to the right collar (204) and communicates with the right annular frame (203). The front side of the left annular frame (203) is connected and connected with a water outlet pipe (206). The right annular frame ( 203) is connected to the front side and communicated with a water inlet pipe (207); it also includes a support ring (301), a sealing block (302) and a return spring (303), the left end of the delivery pipe (201) and the right end of the nozzle (202) are respectively connected to the support ring (301), the support ring (301) is respectively slidably connected to the sealing block (302), the support ring (301) and the sealing block (302) are in close contact, a return spring (303) is connected between the sealing block (302) and the support ring (301), and the sealing blocks (302) on both sides are in contact and fit;It also includes a docking rod (304), a support block (305), a sealing frame (306) and a compression spring (307). The interior of the docking tube (105) and the right end of the inner cooling tube (106) are respectively connected to the support block (305). The sealing frame (306) is slidably connected to the support block (305). The compression spring (307) is between the sealing frame (306) and the support block (305). The interior of the docking tube (105) and the right end of the inner cooling tube (106) are respectively connected to the docking rod (304) at the position on the other side of the support block (305). The sealing frame (306) is in close contact with the docking rod (304). The support blocks (305), the docking rod (304) and the sealing frame (306) on both sides are respectively sealed and rotated with the corresponding delivery tube (201) and the nozzle (202). The sealing frames (306) on both sides are in contact and cooperate.

2. A high-density HDPE pipe forming device according to claim 1, characterized in that: The inner wall of the delivery pipe (201) is coated with a high-temperature resistant coating, which can effectively isolate the heat transfer of the melt in the injection mold (101).

3. A high-density HDPE pipe forming device according to claim 2, characterized in that: The nozzle (202) adopts a multi-hole design, and the outlet of the hole is designed to be an outward-expanding trumpet shape.

4. A high-density HDPE pipe forming device according to claim 3, characterized in that: The utility model also includes a support base (401), a horizontal slide rail (402), a vertical slide rail (403), a lifting block (404) and a cutter (405). The left side of the top of the base (1) is connected to the support base (401). The support base (401) is located on the left side of the forming module (102). The top of the support base (401) is symmetrically installed with a horizontal slide rail (402). The vertical slide rail (403) is slidably connected to the horizontal slide rail (402). The lifting block (404) is slidably connected between the two vertical slide rails (403). The cutter (405) is installed at the bottom of the lifting block (404).

5. A high-density HDPE pipe forming device according to claim 4, characterized in that: The utility model further comprises a follower frame (501), an inclined plate (502), a support plate (503), a clamping plate (504), a tension spring (505) and a return spring (506). The outer sides of the two vertical slide rails (403) are both slidably connected with the inclined plate (502). The inclined plate (502) and the corresponding vertical slide rail (403) are both connected with a tension spring (505). The right sides of the two inclined plates (502) are connected with the follower frame (501). The follower frame (501) abuts against the lifting block (404), so that the tension spring (505) is in a stretched state. The left side of the vertical slide rail (403) is connected with the support plate (503). The clamping plate (504) is slidably connected on the support plate (503). Two return springs (506) are connected between the clamping plate (504) and the support plate (503). The outer ends of the inclined plate (502) and the clamping plate (504) are in contact with each other.

6. A method for using a high-density HDPE pipe forming device, using the high-density HDPE pipe forming device according to any one of claims 1 to 5, characterized in that: The steps include: S1: First, the cooling system is constructed. The cooling module is firmly connected to the water inlet pipe (207) and the water outlet pipe (206) of the water supply component through a quick connector to ensure that the coolant circulation path is unobstructed; the two ends of the external cooling pipe (6) are respectively connected to the coolant water supply device and the recovery device; HDPE raw materials are added to the injection molding module (101), and the injection molding module (101) is started to heat and melt the raw materials; S2: Start the motor (104) to drive the screw rod (107) to transport the molten metal; and manually dock the new and old materials, and push the injection mold (101) to the left through the electric push rod (103), so that the docking tube (105) and the inner cooling tube (106) can be tightly embedded and connected, and at the same time, the nozzle (202) and the delivery tube (201) are precisely engaged to complete the double docking of the molten metal delivery channel and the coolant circulation channel; S3: The screw rod (107) continuously feeds the material and injects the molten metal into the molding channel for molding; at the same time, the cooling module is started, the nozzle (202) sprays the coolant on the inner wall of the inner cooling tube (106), and the outer cooling tube (6) cools the outer periphery of the tube simultaneously. The used coolant flows back to the cooling system through the recovery channel and is recycled after being cooled; S4: When the formed and cooled pipe is output from the discharge end of the forming module (102), the controller controls the cutter (405) to descend and cut along with the pipe, and the auxiliary clamp (504) is clamped synchronously; after cutting, the cutter (405) is reset and the pipe is collected; S5: After completing the production task, the motor (104), the injection molding module (101) and the cooling module are turned off in sequence, the melt conveying and cooling operations are stopped, and the injection molding module (101) is moved right back to its original position by starting the electric push rod (103), and the equipment is cleaned to prepare for the next production.

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