Plastic elevator protective fence extrusion forming machine

Abstract

The invention relates to the technical field of extrusion forming machines, in particular to a plastic elevator protective fence extrusion forming machine which comprises an equipment box, an extrusion mechanism is mounted on the equipment box, a transition box is arranged on one side of the output end of the extrusion mechanism, and a hollow ring is fixedly mounted at the end, close to the extrusion mechanism, of the transition box. A gas acceleration mechanism is arranged on the side, close to the transition box, of the hollow ring, a shaping connector communicating with the output end of the hollow ring is fixedly installed at the end, close to the extrusion mechanism, of the hollow ring, and an extrusion pipe communicating with the shaping connector is fixedly installed in the transition box. According to the extrusion molding machine, through inert gas supporting, spiral airflow design, ultrasonic assistance and electromagnetic field regulation and control, non-contact supporting, uniform cooling and stress optimization of a melt are achieved, the defects of sharkskin and the like are remarkably reduced, and the molding precision and efficiency are improved; a multi-structure cooperative processing system ensures that the melt surface is smooth and flat, and the overall scheme has the advantages of high efficiency, energy conservation, high adaptability and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of extrusion molding machines, and in particular to an extrusion molding machine for plastic elevator protection fences. Background Art

[0002] The elevator protection fence is a key safety protection device in the elevator system, mainly used for fall protection in high-risk positions such as the maintenance openings at the top of the elevator shaft, the machine room passage, and the pit maintenance area. Its main body is usually made of engineering plastics such as high-density polyethylene (HDPE) or polyvinyl chloride (PVC). These materials have characteristics such as corrosion resistance, aging resistance, and impact resistance, and are also lightweight and easy to process. During the production and processing process, it needs to be manufactured by a special extrusion molding machine.

[0003] Between the traditional extrusion molding device and the vacuum sizing interface, there is a suspended sizing section of the plastic melt that is directly in contact with the outside air. Due to the lack of effective protection measures in this area, it is extremely easy to adsorb dust and impurities in the air, thus contaminating the plastic melt. Moreover, there is no corresponding support structure in this suspended sizing section. When process parameters such as the extrusion temperature and rate of the extrusion device fluctuate, it is difficult for the plastic melt to remain stable in the suspended state. This will not only cause its shape to change, but also may cause stress concentration inside the product, seriously affecting the molding effect and reducing the product quality. Therefore, there is an urgent need for an extrusion molding device that can solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned disadvantages existing in the prior art, and to propose an extrusion molding machine for plastic elevator protection fences.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: An extrusion molding machine for plastic elevator protection fences includes an equipment box. An extrusion mechanism is installed on the equipment box. On one side of the output end of the extrusion mechanism, there is a transition box body. One end of the transition box body close to the extrusion mechanism is fixedly installed with a hollow ring. On one side of the hollow ring close to the transition box body, there is a gas acceleration mechanism. One end of the hollow ring close to the extrusion mechanism is fixedly installed with a sizing interface communicated with its output end. Inside the transition box body, there is an extrusion pipe fixedly installed and communicated with the sizing interface. Inside the transition box body, close to one end of the sizing interface, there is a ventilation housing fixedly installed. The ventilation housing is sleeved outside the extrusion pipe, and its inner diameter gradually decreases from left to right. The end of the ventilation housing is provided with an air outlet. The air outlet is composed of several arc-shaped openings, and the arc-shaped openings are distributed around the end of the extrusion pipe. On one side of the lowermost arc-shaped opening, there is a wind guiding plate fixedly installed. Inside the transition box body, at the end far from the sizing interface, there is a flat and smooth mechanism.

[0006] Preferably, the extrusion mechanism includes a control box fixedly installed on one side of the upper end of the equipment box. An operation panel is installed on the control box. On the other side of the upper end of the equipment box, a barrel is fixedly installed. A feeding hopper communicating with its interior is fixedly installed at the front end of the barrel. A plurality of heating rings are equidistantly sleeved on the outer side wall of the barrel. A conveying auger is installed inside the barrel, and the conveying auger is driven by a servo motor installed inside the control box. An outlet is provided at the end of the barrel.

[0007] Preferably, the gas acceleration mechanism consists of a gas supply component and an acceleration component. The gas supply component includes a gas storage tank storing inert gas inside. The transition box body is fixedly installed on the upper end of the gas storage tank through a support frame. A pressure pump is fixedly installed on the lower surface of the transition box body. The input end of the pressure pump is communicated with the interior of the gas storage tank through an air inlet pipe, and the output end of the pressure pump is communicated with an air outlet pipe. One end of the air outlet pipe away from the pressure pump is communicated with the inside of the hollow ring.

[0008] Preferably, the acceleration component includes a plurality of nozzles installed on the hollow ring at equal angles. The nozzles are communicated with the inner cavity of the hollow ring. On the inner wall of the ventilation housing near the hollow ring, a plurality of inclined guide plates are fixedly installed in an annular array. A flow stabilization component is arranged in the middle section of the ventilation housing. On the inner wall of the ventilation housing between the guide plates and the flow stabilization component, a spiral guide groove is arranged in a spiral shape.

[0009] Preferably, the flow stabilization component includes a flow stabilization ring fixedly installed in the middle section of the ventilation housing. The flow stabilization ring is sleeved on the outer side of the extrusion pipe and is arranged in a honeycomb shape as a whole.

[0010] Preferably, a particle cylinder communicating with its interior is fixedly installed on the air outlet pipe. Magnetic nanoparticles are stored in the particle cylinder. An annular coil is embedded in the side wall of the transition box body from front to back. After the annular coil is energized, a pulsed electromagnetic field is generated inside the transition box body. A metal spiral plate is fixedly sleeved on the outer side wall of the ventilation housing. The metal spiral plate is made of a metal material that can be magnetically adsorbed.

[0011] Preferably, the front section of the interior of the extrusion pipe is smooth, and the rear section of the interior is provided with a double - spiral cooling groove. A downward flow port is arranged at the end of the double - spiral cooling groove. The flow port corresponds to and communicates with the lowermost arc - shaped port. A water delivery groove is opened in the side wall of the front section of the extrusion pipe. One end of the water delivery groove is communicated with the inside of the double - spiral cooling groove, and the other end is communicated with a water suction pipe. The end of the water suction pipe away from the water delivery groove is connected to an external coolant supply device after passing through the metal spiral plate.

[0012] Preferably, an ultrasonic rod is installed between the flow stabilization ring and the inner side wall of the transition box body. The working end of the ultrasonic rod acts on the flow stabilization ring and indirectly acts on the extrusion pipe through the flow stabilization ring.

[0013] Preferably, the flattening and smoothing mechanism includes a fixed frame fixedly installed inside the transition box body. A second rotating ring is rotatably installed inside the fixed frame. Two concave inner shafts are installed inside the second rotating ring. A fixed ring is provided on one side of the second rotating ring close to the ventilation housing. A central ring is provided inside the fixed ring. A number of rotating columns are rotatably installed inside the central ring. A plurality of blades are fixedly installed on the outer side wall of the central ring at equal angles. One end of the blade away from the central ring is fixedly connected to the inner wall of the fixed ring. A rotating connection assembly is provided between the fixed ring and the second rotating ring.

[0014] Preferably, the rotating connection assembly includes a first rotating ring provided between the fixed ring and the second rotating ring. The fixed ring and the first rotating ring are connected by a plurality of fixed columns. A bevel gear is provided between the first rotating ring and the second rotating ring. The bevel gear is rotatably connected to the inner side wall of the transition box. Tooth grooves meshing with it are provided on one side of the first rotating ring and the second rotating ring close to the bevel gear.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. In this application, inert gas is released from the gas storage tank and carries magnetic nanoparticles to form a gas film on the surface of the melt, reducing friction and oxidative degradation. The high-speed air flow forms an annular air hood and lifting force through the air outlet, realizing non-contact support and offsetting gravity deformation. The pulsed electromagnetic field enables the magnetic nanoparticles to increase the gas viscosity, suppress the air flow pulsation, and at the same time locally heat to compensate for cooling, avoiding sudden cooling internal stress and reducing the "shark skin" defect.

[0016] 2. In this application, the deflector plate and the deflector groove convert the linear air flow into spiral acceleration, and the flow stabilizing ring breaks large vortices into micro-vortices, improving the air flow stability. The ultrasonic rod reduces the melt viscosity, relaxes the elastic stress, and relieves the extrusion swelling. The double spiral cooling groove combines with the high-speed air flow to attract the liquid to form water mist, uniformly cooling and moistening the melt surface, and improving the forming quality.

[0017] 3. In this application, the air flow at the air outlet drives the blades to rotate, driving the central ring and the rotating columns to strengthen the flatness of the melt surface. The double rotating rings rotate in the opposite direction through the bevel gears, and the concave inner shafts realize the straightening and smoothing treatment of the melt. The metal spiral plate optimizes the magnetic field distribution, stabilizes the temperature of the water suction pipe, and reduces the temperature difference interference.

[0018] 4. In this application, the annular coil generates a pulsed electromagnetic field, locally heats and compensates for cooling through the magnetic nanoparticles, reduces the melt viscosity and elastic modulus, and reduces the flow resistance. The microscopic vibration relaxes the stress concentration, avoids melt rupture, and at the same time improves the extrusion efficiency, realizing high-efficiency and energy-saving precision forming.

[0019] In summary, through the support of inert gas, the design of spiral air flow, ultrasonic assistance and electromagnetic field regulation, the extrusion molding machine realizes the non-contact support of the melt, uniform cooling and stress optimization, significantly reduces defects such as "shark skin", and improves the molding accuracy and efficiency. The multi-structure collaborative processing system ensures the smooth and flat surface of the melt, and the overall solution has the advantages of high efficiency, energy saving and strong adaptability. Brief Description of the Drawings

[0020] Figure 1 It is an overall axonometric structure schematic diagram of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0021] Figure 2 It is a side sectional structure schematic diagram of the barrel of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0022] Figure 3 It is a side sectional structure schematic diagram of the transition box of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0023] Figure 4 It is a side sectional structure schematic diagram of the ventilation housing of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0024] Figure 5 It is Figure 4 the enlarged structure schematic diagram at A of

[0025] Figure 6 It is a structure schematic diagram of the deflector and the flow stabilizer ring of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0026] Figure 7 It is a structure schematic diagram of the central ring and the rotating column of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0027] Figure 8 It is a side sectional structure schematic diagram of the second rotating ring of an extrusion molding machine for plastic elevator protection fences proposed by the present invention.

[0028] In the figure: 1 equipment box, 2 operation panel, 3 feeding hopper, 4 heating ring, 5 barrel, 6 conveying auger, 7 gas storage tank, 8 pressure pump, 9 transition box, 10 intake pipe, 11 particle cylinder, 12 outlet pipe, 13 sizing interface, 14 hollow ring, 15 nozzle, 16 metal spiral plate, 17 ventilation housing, 18 deflector, 19 diversion groove, 20 flow stabilizer ring, 21 extrusion pipe, 22 air outlet, 23 air guiding plate, 24 water suction pipe, 25 ultrasonic rod, 26 water delivery tank, 27 double spiral cooling tank, 28 fixing ring, 29 fixing column, 30 blade, 31 central ring, 32 rotating column, 33 first rotating ring, 34 bevel gear, 35 second rotating ring, 36 concave inner rotating shaft, 37 annular coil. Detailed Embodiments

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] Refer to Figures 1 to 8 , a plastic elevator protective fence extrusion molding machine, including an equipment box 1. One side of the upper end of the equipment box 1 is fixedly installed with a control box, and an operation panel 2 is installed on the control box. Through the operation panel 2, the staff can control the overall operation of the device. On the other side of the upper end of the equipment box 1, a barrel 5 is fixedly installed. At the head end of the barrel 5 (i.e., the end close to the control box), a feeding hopper 3 communicating with its interior is fixedly installed. A plurality of heating rings 4 are equidistantly sleeved on the outer side wall of the barrel 5. After being energized, the heating rings 4 are used to heat the materials conveyed inside the barrel 5. A conveying auger 6 is installed inside the barrel 5, and the conveying auger 6 is driven by a servo motor installed inside the control box. An outlet is opened at the end of the barrel 5.

[0031] On one side of the end of the barrel 5, a gas storage tank 7 placed on the ground is provided. Inert gas is stored inside the gas storage tank 7. The top end of the gas storage tank 7 is fixedly installed with a transition box body 9 arranged in a cylindrical shape through a support frame. One end of the transition box body 9 close to the barrel 5 is fixedly installed with a hollow ring 14. On one side of the hollow ring 14 close to the transition box body 9, a plurality of nozzles 15 are installed at equal angles. The nozzles 15 communicate with the inner cavity of the hollow ring 14. One end of the hollow ring 14 close to the barrel 5 is fixedly installed with a shaping interface 13 communicating with the outlet. Inside the transition box body 9, an extrusion pipe 21 communicating with the shaping interface 13 is fixedly installed, and the extrusion pipe 21 passes through the center position of the hollow ring 14. A pressure pump 8 is fixedly installed on the lower surface of the transition box body 9. The input end of the pressure pump 8 is communicated with the inside of the gas storage tank 7 through an air inlet pipe 10. The output end of the pressure pump 8 is communicated with an air outlet pipe 12. One end of the air outlet pipe 12 far from the pressure pump 8 is communicated with the inside of the hollow ring 14. A particle cylinder 11 communicating with its interior is fixedly installed on the air outlet pipe 12. Magnetic nanoparticles are stored in the particle cylinder 11. The magnetic nanoparticles flow along with the inert gas in the air outlet pipe 12, enter the hollow ring 14, and are finally sprayed out through the nozzles 15.

[0032] A ventilation housing 17 is fixedly installed at one end of the transition box body 9 close to the shaping interface 13. The ventilation housing 17 is sleeved outside the extrusion pipe 21. The inner diameter of the ventilation housing 17 gradually decreases from left to right. A metal spiral plate 16 is fixedly sleeved on the outer side wall of the ventilation housing 17. The metal spiral plate 16 is made of a metal material that can be magnetically adsorbed. On the inner side wall of the ventilation housing 17 close to the hollow ring 14, a plurality of guide plates 18 are fixedly installed in a circular array. The guide plates 18 are inclined (as shown in the attached Figure 6As shown in the figure, the mixture of inert gas and magnetic nanoparticles blown out from the nozzle 15 passes through the gaps between the multiple flow guide plates 18, and is guided by the flow guide plates 18. A flow stabilizing ring 20 is fixedly installed on the middle section of the ventilation housing 17. The flow stabilizing ring 20 is sleeved outside the extrusion tube 21 and is integrally arranged in a honeycomb shape. The mixture of inert gas and magnetic nanoparticles can pass through from left to right through its honeycomb holes. A spiral distribution of flow guide grooves 19 is arranged on the inner wall of a section of the ventilation housing 17 between the flow guide plates 18 and the flow stabilizing ring 20. Through the settings of the flow guide plates 18 and the flow guide grooves 19, the linear airflow can be turned into a swirling flow to achieve the spiral acceleration of the airflow. The setting of the flow stabilizing ring 20 can break the large vortices formed by the airflow into micro vortices to stabilize the airflow, and finally further compress the airflow in the tapered rear section area to increase the airflow velocity.

[0033] An air outlet 22 is arranged at the end of the ventilation housing 17. The air outlet 22 includes a plurality of arc-shaped openings distributed in an annular array (as shown in the attached instructions Figure 6 As shown in the figure). A wind guiding plate 23 arranged in an arc shape is fixedly installed on one side of the lowermost arc-shaped opening. The wind blown out from the lowermost arc-shaped opening of the air outlet 22 forms a force that lifts the plastic melt upward through the wind guiding plate 23. The wind blown out from several other arc-shaped openings of the air outlet 22 forms an annular air hood around the protruding plastic melt, which plays a role in cooling the plastic melt. At the same time, according to Bernoulli's principle, the pressure is lower where the flow velocity is greater, and the blown wind can generate an upward attraction force on the plastic melt.

[0034] The front section inside the extrusion tube 21 is smoothly arranged, and a double spiral cooling groove 27 is arranged in the rear section inside. A downward flow port is arranged at the end of the double spiral cooling groove 27. The flow port corresponds to and is communicated with the position of the lowermost arc-shaped opening. When the high-speed airflow passes through, an attraction force will be generated, thereby driving the liquid in the double spiral cooling groove 27 to flow forward, playing a uniform cooling effect on the plastic melt. Subsequently, the liquid forms a water mist and is ejected from the air outlet 22 to further cool and moisten the plastic melt. A water delivery groove 26 is opened in the side wall of the front section of the extrusion tube 21. One end of the water delivery groove 26 is communicated with the inside of the double spiral cooling groove 27, and the other end is communicated with a water suction pipe 24. The end of the water suction pipe 24 away from the water delivery groove 26 is connected to an external coolant supply device after passing through the metal spiral plate 16.

[0035] An annular coil 37 is embedded in the side wall of the transition box 9 from front to back. After the annular coil 37 is energized, a pulsed electromagnetic field is generated inside the transition box 9. When the inert gas containing magnetic nanoparticles is in the magnetic field, the gas viscosity can be increased, the airflow pulsation can be inhibited, the supporting effect of the airflow on the plastic melt can be strengthened, and the stability of the support can be improved.

[0036] An ultrasonic rod 25 is installed between the steady flow ring 20 and the inner side wall of the transition box body 9. The ultrasonic rod 25 is a prior art, and its specific structural design will not be elaborated here. The working end of the ultrasonic rod 25 acts on the steady flow ring 20 and indirectly acts on the extrusion tube 21 through the steady flow ring 20. The ultrasonic waves emitted by the ultrasonic rod 25 can reduce the melt viscosity, improve the extrusion rate. At the same time, the vibration generated by the ultrasonic waves can relax the elastic stress of the melt and relieve the extrusion swelling phenomenon.

[0037] A fixed frame is fixedly installed at one end of the transition box body 9 far from the shaping interface 13. A second rotating ring 35 is rotatably installed inside the fixed frame. Two concave rotating shafts 36 are installed inside the second rotating ring 35. The two concave rotating shafts 36 are respectively located on both sides of the plastic melt tube and are in rotational contact with its surface. A fixed ring 28 is arranged on one side of the second rotating ring 35 close to the ventilation housing 17. A central ring 31 is arranged inside the fixed ring 28. A number of rotating columns 32 are rotatably installed inside the central ring 31. The plastic melt tube passes through between the number of rotating columns 32 and is in rotational contact with the rotating columns 32. A plurality of blades 30 are fixedly installed on the outer side wall of the central ring 31 at equal angles. One end of the blade 30 far from the central ring 31 is fixedly connected to the inner wall of the fixed ring 28. When the air flow blown out from the air outlet 22 acts on the blades 30, the blades 30 can drive the central ring 31 and the fixed ring 28 to rotate simultaneously. A first rotating ring 33 is arranged between the fixed ring 28 and the second rotating ring 35. The fixed ring 28 and the first rotating ring 33 are connected by a plurality of fixed columns 29. A bevel gear 34 is arranged between the first rotating ring 33 and the second rotating ring 35. The bevel gear 34 is rotatably connected to the inner side wall of the transition box body 9. Tooth grooves meshing with it are opened on one side of the first rotating ring 33 and the second rotating ring 35 close to the bevel gear 34. So that when the fixed ring 28 rotates, it can drive the first rotating ring 33 to rotate synchronously, and the first rotating ring 33 drives the second rotating ring 35 to rotate through the bevel gear 34.

[0038] When the present invention is in use, first, plastic particles are added to the filler hopper 3 at the head end of the barrel 5. The heating ring 4 and the conveying auger 6 are started through the operation panel 2. The conveying auger 6 pushes the melted plastic particles out of the opening at the tail end of the barrel 5, and after passing through the shaping interface 13, the melt of the component rod of the assembled elevator protective fence is extruded.

[0039] The gas storage box 7 filled with inert gas is connected to the pressure pump 8 through the air inlet pipe 10 and the pressure pump 8 is started. The inert gas can reduce the friction between the melt surface and the air, reduce the incidence of the "shark skin" phenomenon, and at the same time, the inert gas can form an air film on the melt surface to prevent the plastic from contacting with oxygen at high temperature, inhibit oxidative degradation, and reduce problems such as yellowing and molecular weight reduction. The connection section between the pressure pump 8 and the air outlet pipe 12 is provided with a microparticle cylinder 11 containing magnetic nanoparticles. The inert gas containing magnetic nanoparticles is ejected from the nozzle 15 on the hollow ring 14 and passes through The air is blown out from the air outlet 22 after the ventilation shell 17, and the wind blown out from the multiple arc-shaped openings above the air outlet 22 forms an annular wind cover around the protruding plastic melt, which cools the plastic melt. At the same time, according to Bernoulli's principle, the greater the flow rate, the smaller the pressure. The blown wind can generate an upward attraction for the plastic melt. The wind blown out from the lowest arc-shaped opening of the air outlet 22 passes through the air guide plate 23 to form an upward lifting force for the plastic melt, thereby realizing contactless support for the plastic melt, offsetting the influence of gravity, and avoiding deformation of the plastic melt.

[0040] The annular coil 37 is energized to generate a pulsed electromagnetic field. When the inert gas containing magnetic nanoparticles is in the magnetic field, the viscosity of the gas can be increased, the airflow pulsation can be suppressed, the airflow supporting effect on the plastic melt can be strengthened, and the stability of the support can be improved. The magnetic nanoparticles produce hysteresis loss or eddy current effect under the action of the pulsed electromagnetic field, and the heat is locally released to compensate for the cooling process, thereby avoiding the internal stress caused by the sudden cooling of the melt. The electromagnetic field can also directly act on the inside of the melt to generate Joule heat, which can also locally compensate for the heat loss in the cooling process, avoid excessive temperature gradients caused by sudden cooling, and reduce the internal stress caused by too fast cooling of the outer layer. The electromagnetic field acts on the plastic melt, reduces the melt viscosity and flow resistance by affecting the motion state of the plastic polymer chain, thereby improving the efficiency of extrusion molding. At the same time, the elastic modulus and shear stress sensitivity of the melt can be reduced by interfering with the entanglement state of the polymer chain. When the melt passes through the opening in front of the extrusion tube 21, the microscopic vibration caused by the electromagnetic field can relax the local stress concentration, thereby avoiding the "shark skin" or "bamboo pattern" phenomenon caused by the melt rupture due to excessive elastic recovery.

[0041] The air flow blown out by the nozzle 15 passes through the inclined deflector 18. Since the inner diameter of the ventilation housing 17 gradually decreases and a flow guide groove 19 is provided inside it, the linear air flow can be turned into a swirling flow to achieve the spiral acceleration of the air flow. Subsequently, the air flow passes through the flow stabilizing ring 20 arranged in a honeycomb shape in the middle section. After passing through, the large vortex can be broken into micro vortices to stabilize the air flow. Finally, the air flow is further compressed in the tapered rear section area to increase the air flow speed and is blown out from the air outlet 22. At the same time, the air flow passing through the inside can play a role in assisting in cooling the extrusion tube 21; the metal spiral plate 16 can generate eddy currents under the action of a magnetic field, and its induced magnetic field is superimposed on the magnetic field of the original coil to increase the axial magnetic field intensity and optimize the magnetic circuit. At the same time, it can play a certain role in uniforming the temperature, changing and stabilizing the temperature of the water suction pipe 24 passing through the metal spiral plate 16, reducing the temperature difference from the plastic melt, and avoiding affecting the forming effect of the plastic melt.

[0042] After that, the ultrasonic rod 25 is started. The ultrasonic rod 25 emits ultrasonic waves. The ultrasonic waves can reduce the melt viscosity in the extrusion tube 21 and increase the extrusion rate. At the same time, the vibration generated by the ultrasonic waves can relax the elastic stress of the melt, relieve the extrusion swelling phenomenon, and reduce the "shark skin" defect. The cavitation effect of the ultrasonic waves can also enhance the heat transfer efficiency of the liquid in the extrusion tube 21 and improve the heat dissipation effect.

[0043] The front section of the inner wall of the extrusion tube 21 is smooth, and the inner wall of the rear section is provided with a double - spiral cooling groove 27. The water suction pipe 24 is connected to the water delivery groove 26 inside the extrusion tube 21 and then leads to the double - spiral cooling groove 27. There is a downward opening at the end of the double - spiral cooling groove 27, which corresponds to the arc - shaped opening below the air outlet 22. When the high - speed air flow passes through, an attraction force will be generated, which will drive the liquid in the double - spiral cooling groove 27 to flow forward, achieving a uniform cooling effect on the plastic melt. Subsequently, the liquid forms a water mist and is sprayed out from the air outlet 22 to further cool and moisten the plastic melt.

[0044] The air flow blown out from the air outlet 22 acts on the blade 30, causing the blade 30 to rotate around the central ring 31 through which the plastic melt tube passes. There are three rotating columns 32 arranged inside the central ring 31, which can strengthen the surface flatness of the plastic melt tube. The fixed ring 28 on the outer circle of the blade 30 is connected to the first rotating ring 33 through the fixed column 29. The first rotating ring 33 is connected to the second rotating ring 35 through the bevel gear 34. The concave inner rotating shaft 36 connected to the second rotating ring 35 contacts the plastic melt tube for smoothing and straightening treatment and guides the plastic melt tube to extend out of the transition box 9.

[0045] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A plastic elevator protective fence extrusion molding machine, comprising an equipment box (1), on which an extrusion mechanism is installed, characterized in that: A transition box (9) is provided on one side of the output end of the extrusion mechanism, a hollow ring (14) is fixedly installed on one end of the transition box (9) close to the extrusion mechanism, a gas acceleration mechanism is provided on one side of the hollow ring (14) close to the transition box (9), a shaping interface (13) connected to the output end of the hollow ring (14) is fixedly installed on one end of the hollow ring (14) close to the extrusion mechanism, and an extrusion tube (21) connected to the shaping interface (13) is fixedly installed inside the transition box (9); A ventilation housing (17) is fixedly installed at one end of the transition box (9) near the shaping interface (13). The ventilation housing (17) is sleeved on the outside of the extrusion tube (21), and its inner diameter gradually decreases from left to right. An air outlet (22) is provided at the end of the ventilation housing (17). The air outlet (22) is composed of a plurality of arc-shaped openings. The arc-shaped openings are distributed on the periphery of the end of the extrusion tube (21), and an air induction plate (23) is fixedly installed on one side of the lowest arc-shaped opening. A flat and smooth mechanism is provided at one end of the transition box (9) away from the shaping interface (13).

2. The plastic elevator protective fence extrusion molding machine according to claim 1 is characterized in that: The extrusion mechanism comprises a control box fixedly mounted on one side of the upper end of an equipment box (1), an operation panel (2) being mounted on the control box, a barrel (5) being fixedly mounted on the other side of the upper end of the equipment box (1), a feeding hopper (3) being fixedly mounted at the head end of the barrel (5) and being communicated with the interior thereof, a plurality of heating rings (4) being sleeved at equal intervals on the outer wall of the barrel (5), a conveying auger (6) being mounted inside the barrel (5), the conveying auger (6) being driven by a servo motor mounted inside the control box, and a discharge port being disposed at the end of the barrel (5).

3. The plastic elevator protective fence extrusion molding machine according to claim 1 is characterized in that: The gas acceleration mechanism is composed of an air supply component and an acceleration component. The air supply component includes an air storage box (7) storing inert gas therein. A transition box (9) is fixedly mounted on the upper end of the air storage box (7) via a support frame. A pressure pump (8) is fixedly mounted on the lower end surface of the transition box (9). The input end of the pressure pump (8) is connected to the interior of the air storage box (7) via an air inlet pipe (10). The output end of the pressure pump (8) is connected to an air outlet pipe (12). The end of the air outlet pipe (12) away from the pressure pump (8) is connected to the interior of the hollow ring (14).

4. The plastic elevator protective fence extrusion molding machine according to claim 3 is characterized in that: The acceleration assembly comprises a plurality of nozzles (15) mounted at equal angles on a hollow ring (14), the nozzles (15) being connected to an internal cavity of the hollow ring (14), a plurality of inclined guide plates (18) being fixedly mounted in a ring array on an inner wall of a side of the ventilation shell (17) close to the hollow ring (14), a flow stabilization assembly being arranged on a middle section of the ventilation shell (17), and a guide groove (19) distributed in a spiral shape being arranged on a section of the inner wall of the ventilation shell (17) between the guide plate (18) and the flow stabilization assembly.

5. The plastic elevator protective fence extrusion molding machine according to claim 4, characterized in that: The flow stabilizing component comprises a flow stabilizing ring (20) fixedly mounted on the middle section of the ventilation shell (17); the flow stabilizing ring (20) is sleeved on the outside of the extrusion tube (21) and is arranged in a honeycomb shape as a whole.

6. The plastic elevator protective fence extrusion molding machine according to claim 3, characterized in that: A particle cartridge (11) is fixedly mounted on the air outlet pipe (12) and is in communication with the interior thereof. Magnetic nanoparticles are stored in the particle cartridge (11). A ring coil (37) is embedded in the side wall of the transition box (9) from front to back. When the ring coil (37) is energized, a pulse electromagnetic field is generated inside the transition box (9). A metal spiral plate (16) is fixedly sleeved on the outer wall of the ventilation housing (17). The metal spiral plate (16) is made of a metal material that can be attracted by magnetic force.

7. The plastic elevator protective fence extrusion molding machine according to claim 6, characterized in that: The front section of the interior of the extrusion tube (21) is smoothly arranged, and the rear section of the interior is provided with a double helix cooling groove (27). A downward flow port is arranged at the end of the double helix cooling groove (27), and the flow port corresponds to the position of the lowest arc-shaped port and is connected thereto. A water delivery groove (26) is opened in the side wall of the front section of the extrusion tube (21), one end of the water delivery groove (26) is connected to the inside of the double helix cooling groove (27), and the other end is connected to a water suction pipe (24). The end of the water suction pipe (24) away from the water delivery groove (26) passes through the metal spiral plate (16) and is connected to an external cooling liquid supply device.

8. The plastic elevator protective fence extrusion molding machine according to claim 5, characterized in that: An ultrasonic rod (25) is installed between the flow stabilizing ring (20) and the inner wall of the transition box (9), and the working end of the ultrasonic rod (25) acts on the flow stabilizing ring (20) and indirectly acts on the extrusion tube (21) through the flow stabilizing ring (20).

9. The plastic elevator protective fence extrusion molding machine according to claim 1, characterized in that: The smoothing mechanism comprises a fixed frame fixedly mounted inside the transition box (9), a second rotating ring (35) being rotatably mounted inside the fixed frame, two inner concave rotating shafts (36) being mounted inside the second rotating ring (35), a fixed ring (28) being arranged on a side of the second rotating ring (35) close to the ventilation housing (17), a center ring (31) being arranged inside the fixed ring (28), a plurality of rotating columns (32) being rotatably mounted inside the center ring (31), a plurality of blades (30) being fixedly mounted at equal angles on an outer wall of the center ring (31), an end of the blade (30) away from the center ring (31) being fixedly connected to the inner wall of the fixed ring (28), and a rotating connection assembly being arranged between the fixed ring (28) and the second rotating ring (35).

10. The plastic elevator protective fence extrusion molding machine according to claim 9, characterized in that: The rotating connection assembly comprises a first rotating ring (33) arranged between a fixed ring (28) and a second rotating ring (35); the fixed ring (28) and the first rotating ring (33) are connected via a plurality of fixed columns (29); a bevel gear (34) is arranged between the first rotating ring (33) and the second rotating ring (35); the bevel gear (34) is rotatably connected to the inner wall of the transition box (9); and a tooth groove meshing with the bevel gear (34) is provided on one side of the first rotating ring (33) and the second rotating ring (35) close to the bevel gear (34).

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