An injection molding production equipment for plastic pipes of automobile parts

Abstract

The application discloses a kind of automobile piece plastic pipe injection molding production equipment, it is related to injection molding production technical field, including frame main body, the lower portion of frame main body is equipped with drive module, the upper portion of drive module is provided with dynamic injection mechanism, dynamic injection mechanism is used for continuously dynamic guiding injection melt flow, dynamic injection mechanism includes the driving ring disc of installation in the upper portion of drive module, injection skeleton can continuously keep rotating in injection molding process, to guarantee the flow direction of injection melt in cavity shell is no longer fixed, this kind of dynamic flow mode helps to break the unstable flow pattern formed in the flow process of melt, such as the problem of boundary layer separation in laminar flow, and by the flow direction of melt constantly driven by directional rotation, can make the pressure distribution of melt in cavity shell more balanced, reduce the uneven melt distribution phenomenon caused by local pressure too high or too low, this kind of uniform melt distribution helps to improve the density uniformity of product.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding production, in particular to an injection molding production device for automobile plastic tubes. Background Art

[0002] The existing injection molding production device is a type of automobile plastic tube injection molding production equipment that adopts hot runner injection molding. It uses hot runner technology to control the plastic flow channel to achieve efficient and high-quality injection molding. Hot runner technology is an innovative injection mold technology that keeps the plastic in a molten state by heating the flow channel to avoid the formation of agglomerates, thereby reducing pressure loss.

[0003] In the Chinese patent publication number CN114290612A, a mold injection molding device for plastic pipe processing is disclosed, including a base and an upper module, the top wall of the base is fixedly connected to a box body, the inner wall of the box body is provided with a spraying mechanism, the spraying mechanism includes a slide symmetrically opened on the inner wall of the box body, the inner wall of the slide is slidably connected to a magnetic rod, the side wall of the magnetic rod is installed with a lower module, the side wall of the lower module is rotatably connected to a first rod, the other end of the first rod is rotatably connected to the inner wall of the box body, the bottom inner wall of the box body is fixedly connected to a lower nozzle, the bottom inner wall of the box body is symmetrically embedded with an electromagnet, the bottom wall of the lower module is fixedly connected to an upper nozzle, and the inner wall of the lower module is symmetrically embedded with a magnet. By arranging structures such as the electromagnet, the magnet and the first rod, the slip ring is sealed and slid to the right inside the rectangular groove, thereby squeezing the release agent in the rectangular groove into the upper and lower nozzles for spraying, and spraying the release agent on the inner cavities of the upper and lower modules.

[0004] However, the equipment and prior art in the above patents still have the following defects when used: 1. Compared with the above patent documents, by setting up structures such as electromagnets, magnets and the first rod, the slip ring is made to slide sealedly to the right inside the rectangular groove, thereby squeezing the release agent in the rectangular groove into the upper nozzle and the lower nozzle and spraying it out, spraying the release agent on the inner cavity of the upper module and the lower module.

[0005] First of all, this demoulding method involves the coordinated work of multiple components, and the large number of components increases the complexity of the equipment, making the probability of failure of each component relatively high. Once a component fails, it is difficult to troubleshoot and repair it. Since the various components are interrelated, the failure of a small component requires the disassembly and inspection of the entire spraying mechanism, which will consume a lot of time and manpower costs.

[0006] Secondly, relying on the sealing sliding of the slip ring to extrude the release agent for spraying will result in uneven release agent spraying because the sliding of the slip ring in the rectangular groove will be affected by many factors, such as uneven friction and the roughness difference of the rectangular groove wall. If the sliding of the slip ring is uneven, the extrusion pressure of the release agent will be uneven, resulting in uneven release agent dosage sprayed by the upper and lower nozzles.

[0007] Finally, it is difficult to achieve precise control of the release agent ejection volume by extruding the slip ring, because factors such as the sliding speed and sealing effect of the slip ring will affect the extrusion volume of the release agent. For example, as the equipment is used, the sealing performance of the slip ring will gradually decrease, which will lead to leakage of the release agent or unstable extrusion volume. In actual production, excessive use of release agent will increase costs and will cause residue on the product to affect product quality, while too little use will result in incomplete demolding.

[0008] 2. Compared with existing technologies, some plastic materials used for plastic tubes for automotive parts, such as polycarbonate PC and polyamide PA, have high viscosity. During the injection molding process, even under the heating and pressure of the hot runner system, these highly viscous plastic melts are difficult to completely flow out from the nozzle output end. Therefore, when the injection molding is completed and the pressure disappears, part of the melt will remain at the nozzle output end. The injection molding liquid remaining at the nozzle output end will drip into the mold cavity during the next injection molding, resulting in appearance defects such as flow marks and spots on the surface of the plastic product. For plastic tubes for automotive parts, the appearance quality requirements are relatively high. These defects will affect the overall aesthetics of the product and fail to meet the quality standards of automotive parts.

[0009] In addition, the hot runner system usually maintains the temperature of the plastic melt through a built-in heating element, and the nozzle is located below the hot runner. The distance between it and the heating element is relatively far, and the heat transfer path is long. Therefore, the heat needs to pass through the main structure of the hot runner to be transferred from the heating element to the nozzle. There will be a certain amount of heat loss in this process, which will cause a temperature difference between the hot runner and the nozzle. Due to the temperature difference between the inside of the hot runner and the nozzle, the viscosity of the plastic melt will change when passing through the nozzle. The nozzle part with lower temperature will increase the viscosity of the plastic melt and deteriorate the fluidity, which will cause the plastic melt to fill the mold cavity unevenly, resulting in forming defects such as material shortage and sink marks.

[0010] In view of this, the present invention proposes an automobile plastic tube injection molding production equipment to make up for and improve the shortcomings of the prior art. Summary of the Invention

[0011] In order to solve the above technical problems, the present invention provides an injection molding production equipment for automobile plastic tubes to solve the technical problems raised in the above background technology.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is: a kind of automobile plastic tube injection molding production equipment, including a frame body, a drive module is installed under the frame body, and a dynamic vibration injection mechanism is arranged above the drive module, and the dynamic vibration injection mechanism is used to continuously and dynamically guide the flow of injection melt.

[0013] Furthermore, the dynamic vibration injection mechanism includes an active gear ring disk installed above the driving module, a driven gear set is installed inside the active gear ring disk, an injection molded skeleton is installed above the driven gear set, the interior of the injection molded skeleton is rotatably connected to an inner support shaft, elastic parts are evenly installed on the inner wall of the injection molded skeleton, the injection molded skeleton is cylindrical as a whole, and the inner wall of the injection molded skeleton is provided with a threaded groove.

[0014] Furthermore, the driven gear set as a whole includes no less than four gears, and the driving gear ring plate is in meshing engagement with the gears in the driven gear set.

[0015] Furthermore, slots are evenly opened on the upper surface of the gears in the driven gear set, and cylindrical protrusions are fixedly connected to the lower surface of the injection molded skeleton at positions corresponding to the slots. The driven gear set and the injection molded skeleton are movably connected through the slots and the cylindrical protrusions.

[0016] Furthermore, the outer wall of the inner support shaft is evenly fixedly connected with symmetrical inclined panels, the elastic part as a whole includes a metal ball and an elastic rope, the elastic ropes in the elastic part are fixedly connected to the inner wall of the injection-molded skeleton, and the symmetrical inclined panels of the outer wall of the inner support shaft are all located on the movement path of the metal ball in the elastic part.

[0017] Furthermore, a feeding module is installed above the frame body, a hot runner module is installed below the feeding module, and a cavity preheating mechanism is provided below the hot runner module. The cavity preheating mechanism is used to recycle the injection melt remaining after the injection molding is completed. The cavity preheating mechanism includes a driving plywood installed below the hot runner module, and the lower surface of the driving plywood is evenly fixedly connected to the adjusting rod, and the outer wall of the adjusting rod is slidably connected to the storage cylinder.

[0018] Furthermore, a preheating sleeve is installed on the inner side wall of the storage cylinder, and a spacer layer is installed on the outside of the preheating sleeve. The preheating sleeve is entirely composed of boron nitride ceramic material, and the spacer layer is entirely composed of heat-sensitive material.

[0019] Furthermore, connecting pipes are evenly provided on the inner side wall of the storage cylinder, and one-way valves are evenly installed inside the connecting pipes. In an initial state, the one-way valves are in a closed state.

[0020] Furthermore, the driving module includes a driving motor, a driving cylinder, an injection molding cavity shell and a guide rail assembly, the active gear ring disk is fixedly connected to the outer wall of the output shaft end of the driving motor in the driving module, the injection molding cavity shell in the driving module is in a separated state in the initial state, and the injection molding skeleton is located at the center position of the injection molding cavity shell in the driving module.

[0021] Furthermore, the feeding module includes a funnel container and a screw feeder, the hot runner module includes a hot runner plate, a nozzle and a heating source, and the feeding output end in the feeding module is connected to the hot runner plate input end in the hot runner module.

[0022] Furthermore, the storage cylinder is located outside the nozzle in the hot runner module, the storage cylinder and the nozzle in the hot runner module are connected through a connecting pipe, and the preheating sleeve is connected to the heating source in the hot runner module.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The device enables the injection molding skeleton to keep rotating during the injection molding process by introducing a driven gear set, thereby ensuring that the flow direction of the injection molding melt in the cavity shell is no longer fixed. From the perspective of fluid dynamics, this dynamic flow mode helps to break the unstable flow pattern formed by the melt during the flow process, such as boundary layer separation in laminar flow, and continuously drives the flow direction of the melt through directional rotation, which can make the pressure distribution of the melt in the cavity shell more balanced and reduce the uneven distribution of the melt caused by excessive or low local pressure. This uniform melt distribution helps to improve the density uniformity of the product, and can significantly improve the overall quality and performance stability of products with high structural strength and performance requirements, such as automotive plastic pipes.

[0024] Compared with the existing technology, it avoids the concentrated flow of melt in a specific direction under the traditional fixed mold, so that the melt can be more evenly filled into various parts of the cavity shell, thereby reducing defects inside the product caused by uneven distribution of melt, such as sink marks, delamination, etc., thereby improving the appearance quality and physical properties of the product.

[0025] Moreover, the rotatable injection molding skeleton can change its relative position with the mold by rotating itself, so that the two always maintain a fitting dynamic separation state in the relative space. Then, during the demoulding process, the change in relative position makes it easier for the formed product to be separated from the mold. From the perspective of demoulding mechanics, the friction and adhesion between the product and the mold during the demoulding process are the key factors affecting the demoulding effect. The device changes the contact state between the product and the mold through the rotatable injection molding skeleton, and can adjust the distribution of friction and adhesion, making the demoulding force more uniform and reasonable. At the same time, this rotation method can also prevent the product from being subjected to excessive local stress during the demoulding process, reducing the risk of product deformation and damage.

[0026] Compared with the method of injecting mold release agent, the rotation characteristics introduced by this device can make the stress distribution during demolding more uniform, the force on each part of the product more balanced, and thus make the demolding process smoother, which helps to improve the efficiency and success rate of demolding and reduce the damage to the product during the demolding process. Reducing the demolding time can improve the production efficiency of injection molding. In the large-scale production of pipe products, a small reduction in the demolding time in each injection molding cycle can significantly improve the overall production efficiency.

[0027] In addition, during the injection molding process, the plastic melt brings in a large amount of heat, and the injection molding cavity shell needs to be cooled quickly to ensure the molding quality of the product. From the principle of heat conduction and heat exchange, the rotation of the injection molding skeleton increases the relative movement between the melt and the cavity shell, and enhances the heat exchange efficiency between the two. Through this uniform heat dissipation, the shrinkage rate of each part of the product during the cooling process can be more consistent, reducing product deformation and dimensional deviation caused by uneven cooling.

[0028] Compared with the existing technology, the rotation of the injection molding frame helps to evenly dissipate heat. As the injection molding frame rotates, the contact position between the product and the injection molding cavity shell changes continuously, so that heat can be transferred more evenly to various parts of the mold, avoiding local overheating or overcooling.

[0029] What is particularly important is that as the injection molding skeleton continues to rotate, the metal balls in the elastic part are constantly in contact with the inclined plate on the outer wall of the inner support shaft and rebound to hit the inner wall of the injection molding skeleton, thereby generating a continuous vibration force on the injection molding melt. The vibration force can increase the shear thinning effect of the plastic melt. Under the action of vibration, the shear rate distribution of the melt at the microscopic level is more uniform, so that the areas with greater flow resistance inside the injection molding skeleton can also be better filled, which helps to improve the filling integrity of the injection molding cavity shell. Through this vibration, it can be ensured that the plastic melt can be filled into every corner, reducing the possibility of short shots (underfilling).

[0030] In addition, the vibration force can also promote the discharge of bubbles in the plastic injection molding liquid. During the injection molding process, due to the melting and flow of the plastic, some air will inevitably be drawn in to form bubbles. The vibration force can provide additional energy for the bubbles, making it easier for them to overcome the viscous resistance and surface tension of the melt, thereby moving to the surface of the melt and being discharged. In addition, vibration can also make the pressure distribution inside the melt more uniform, reduce the formation and aggregation of bubbles caused by local pressure fluctuations, and by reducing the bubble content in the melt, the internal quality of the product is significantly improved, and its mechanical properties such as strength and toughness will also be improved accordingly.

[0031] In addition, with the continuous rotation of the injection molding frame and the collision and knocking of the metal ball with the inclined plate, a certain impact force will be generated. This impact force can cause the residual melt that tends to adhere to the inner wall of the injection molding frame to fall off, and then the residual melt on the inner wall of the injection molding frame can be removed in time, keeping the equipment clean and operating normally, and reducing the maintenance frequency and downtime of the equipment.

[0032] Among them, the design of the thread groove enables the airflow generated when the injection molding skeleton rotates to flow along the groove in a spiral form. This flow method increases the contact area and contact time between the airflow and the inner wall of the skeleton, and can continuously bring heat from the high-temperature area of ​​the skeleton to the low-temperature area, which helps to achieve uniform heat distribution inside the mold. In addition, the thread groove guides the spiral airflow to directly act on the contact surface between the injection molding skeleton and the inner wall of the product, effectively taking away the heat in this area. This design ensures that the inner and outer sides of the product can maintain a relatively consistent temperature gradient during the cooling process.

[0033] (2) This device forms a small piston structure on the outer wall of the nozzle output end by introducing an adjusting rod and a storage cylinder. When the injection melt flows out normally, the formed piston structure is ensured to remain disconnected from the inside of the nozzle, so as not to affect the normal injection process of the plastic melt. When the injection molding stage is completed, the piston structure is connected to the inside of the nozzle by driving the control of the clamping plate. At this time, the displacement operation is performed with the help of the adjusting rod to effectively extract and remove the residual injection liquid at the nozzle output end. The active extraction effect of the piston structure effectively avoids the contamination of the mold cavity by the residual injection liquid. In addition, the recycling of the residual injection liquid by the piston structure can also improve the utilization rate of plastic materials and reduce the material consumption per unit product.

[0034] Compared with the existing technology, this device can significantly improve the surface finish and appearance quality of the product by eliminating the appearance defects caused by residual liquid dripping, so that it meets the strict quality standards of automotive parts, and thus meets the automotive industry's high standards for the appearance quality of parts. In addition, in terms of recycling, it also improves the utilization rate of plastic materials, helps to reduce production costs, reduce the environmental pressure of waste disposal, and achieve a win-win situation in economic and environmental benefits.

[0035] What is particularly important is that this device adds a ring-shaped preheating sleeve made of boron nitride ceramic material between the inner wall of the piston structure and the outer wall of the nozzle. Before the injection molding equipment is started or during the injection interval, the preheating sleeve can guide the heat inside the hot runner to preheat the nozzle in advance. From the principle of heat conduction, boron nitride ceramics have good thermal conductivity and can effectively transfer the heat of the hot runner to the nozzle, reducing the temperature difference between the hot runner and the nozzle. Through the preheating effect of the preheating sleeve, the plastic melt can maintain a relatively stable temperature when passing through the nozzle, ensuring uniform viscosity and fluidity of the melt, which helps to achieve uniform filling of the plastic melt in the mold cavity and avoid the problem of uneven melt flow caused by temperature differences.

[0036] Secondly, a spacer layer composed of heat-sensitive material is set between the preheating sleeve and the piston cylinder. When the preheating sleeve conducts heat, the heat-sensitive material expands due to the heat, filling the gap between the preheating sleeve and the piston cylinder to achieve thermal insulation effect. The thermal insulation effect of the spacer layer can effectively prevent the temperature difference between different structures caused by heat transfer from being too large, and maintain the stability of the internal temperature of the structure. This not only helps to maintain the temperature uniformity of the plastic melt, but also reduces the impact of the external environment on the system temperature, and improves the stability and controllability of the injection molding process.

[0037] Finally, when the injection molding is completed, the heat-sensitive material returns to its original state, and the gap between the preheating sleeve and the piston cylinder is restored, ensuring the heat dissipation and cooling effect. From the perspective of heat exchange, the restoration of the gap allows the heat to be dissipated more smoothly, avoiding the heat dissipation problem caused by excessive thermal insulation, thereby ensuring that the product is quickly cooled and shaped in the mold cavity shell, improving production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention.

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the dynamic vibrating injection mechanism in the present invention.

[0040] Figure 3 It is a schematic diagram of the three-dimensional structure of the active gear ring disk in the present invention.

[0041] Figure 4 It is a schematic diagram of the three-dimensional structure of the driven gear set in the present invention.

[0042] Figure 5 Schematic diagram of the internal three-dimensional structure of the injection-molded skeleton in the present invention.

[0043] Figure 6 For the present invention Figure 5 A schematic diagram of the partially enlarged three-dimensional structure at point A in the middle.

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure of the hot runner module in the present invention.

[0045] Figure 8 It is a schematic diagram of the three-dimensional structure of the cavity preheating mechanism in the present invention.

[0046] Figure 9 Schematic diagram of the internal three-dimensional structure of the storage cylinder in the present invention.

[0047] Figure 10 This is a partial exploded view of the cavity preheating mechanism in the present invention.

[0048] The numbers in the figure are: 1. Frame body; 11. Feeding module; 12. Hot runner module; 13. Driving module; 2. Dynamic vibration injection mechanism; 21. Active gear ring disk; 22. Driven gear set; 23. Injection molding skeleton; 24. Inner support shaft; 25. Elastic part; 26. Threaded groove; 3. Cavity preheating mechanism; 31. Driving clamp; 32. Adjusting rod; 33. Storage cylinder; 34. Preheating sleeve; 35. Spacer layer. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0050] It should be noted that the structures and working principles of the above-mentioned components such as the rack body 1, the feeding module 11, the hot runner module 12, and the driving module 13 belong to the existing technology and will not be described in detail here.

[0051] Example 1: Please refer to Figure 1 and Figure 2 As shown, a plastic tube injection molding production equipment for automobile parts includes a frame body 1, a driving module 13 is installed below the frame body 1, and a dynamic vibrating injection mechanism 2 is provided above the driving module 13. The dynamic vibrating injection mechanism 2 is used to continuously and dynamically guide the flow of the injection melt.

[0052] It should be noted that the driving module 13 includes a driving motor, a driving cylinder, an injection cavity shell and a guide rail assembly. The active gear ring disk 21 is fixedly connected to the outer wall of the output shaft end of the driving motor in the driving module 13. The injection cavity shell in the driving module 13 is in a separated state in the initial state, and the injection skeleton 23 is located at the center position of the injection cavity shell in the driving module 13. The feeding module 11 includes a funnel container and a screw feeder. The hot runner module 12 includes a hot runner plate, a nozzle and a heating source. The feeding output end in the feeding module 11 is connected to the hot runner plate input end in the hot runner module 12. The storage cylinder 33 is located outside the nozzle in the hot runner module 12. The storage cylinder 33 is connected to the nozzle in the hot runner module 12 through a connecting pipe. The preheating sleeve 34 is connected to the heating source in the hot runner module 12.

[0053] Please refer to Figures 2 to 6 As shown, the dynamic vibrating injection mechanism 2 includes an active gear ring disk 21 installed above the driving module 13, a driven gear set 22 is installed inside the active gear ring disk 21, an injection molded skeleton 23 is installed above the driven gear set 22, the interior of the injection molded skeleton 23 is rotatably connected to the inner support shaft 24, the inner wall of the injection molded skeleton 23 is evenly installed with elastic parts 25, the injection molded skeleton 23 is cylindrical as a whole, and the inner wall of the injection molded skeleton 23 is provided with a threaded groove 26.

[0054] It should be noted that the driven gear set 22 as a whole includes no less than four gears, the driving gear ring plate 21 and the gears in the driven gear set 22 are all in meshing, slots are evenly opened on the upper surface of the gears in the driven gear set 22, and cylindrical protrusions are fixedly connected at the corresponding slot positions on the lower surface of the injection molded skeleton 23. The driven gear set 22 and the injection molded skeleton 23 are movably connected through the slots and the cylindrical protrusions. The outer wall of the inner support shaft 24 is evenly fixedly connected with symmetrical inclined panels. The elastic part 25 as a whole includes metal balls and elastic ropes. The elastic ropes in the elastic part 25 are fixedly connected to the inner wall of the injection molded skeleton 23, and the symmetrical inclined panels on the outer wall of the inner support shaft 24 are all located on the movement path of the metal ball in the elastic part 25.

[0055] Specifically, since the gears in the driven gear set 22 are all meshed with the active gear ring disk 21, when the drive motor in the drive module 13 is running, the active gear ring disk 21 will synchronously drive the injection molding skeleton 23 to rotate through the gears in the driven gear set 22. In the subsequent injection molding process, when the injection molding skeleton 23 continues to rotate under the action of the driven gear set 22, the flow direction of the melt output from the hot runner module 12 is no longer fixed. From the perspective of relative motion, the flow state of the melt relative to the cavity shell wall is constantly changing, making it difficult for the originally stably formed boundary layer to persist, because the formation of the boundary layer depends on relatively stable flow conditions, and the rotation causes the relative speed and direction between the melt and the wall to change continuously, thereby breaking the stable structure of the boundary layer and effectively suppressing the formation of unstable flow modes such as boundary layer separation. This dynamic flow mode can promote the melt to diffuse and mix more fully in the cavity shell, avoiding excessive accumulation or loss of the melt in local areas, thereby making the pressure distribution of the melt in the cavity shell more balanced.

[0056] Furthermore, since the elastic cords in the elastic member 25 are fixedly connected to the inner wall of the injection molded skeleton 23, the injection molded skeleton 23 drives the elastic member 25 to rotate synchronously as a whole. Since the inclined plate on the outer wall of the inner support shaft 24 is located on the motion path of the metal ball in the elastic member 25, when the elastic member 25 rotates, the metal ball will continuously contact and rebound and hit the inner wall of the injection molded skeleton 23, and the generated vibration force will be transmitted to the plastic melt. From a microscopic perspective, the vibration intensifies the relative motion between the melt molecules, changes the conformation of the molecular chains, and reduces the degree of entanglement between molecules. This is equivalent to introducing additional shearing action within the melt, increasing the shear rate of the melt. According to the principle of shear thinning effect, the viscosity of the melt will decrease and the fluidity will be enhanced.

[0057] At the same time, when the injection-molded skeleton 23 rotates, under the action of centrifugal force, the airflow tends to move outward, and the magnitude of the centrifugal force is related to the mass of the object, the rotation radius and the angular velocity. Inside the injection-molded skeleton 23, the airflow molecules will be affected by the centrifugal force, causing them to move in the direction away from the axis. In a relatively sealed space, the flow of airflow follows the continuity equation, that is, the principle of conservation of mass. According to the continuity equation, in a stable flow system, the mass of fluid flowing into a certain area per unit time must be equal to the mass of fluid flowing out of the area. The spiral shape of the thread groove 26 on the inner wall of the injection-molded skeleton 23 provides a specific guiding path for the airflow. When the airflow moves outward under the action of centrifugal force, the spiral structure of the thread groove 26 will guide the airflow to flow along the groove direction. Since the thread groove 26 is a continuous spiral shape, the airflow will be continuously constrained and guided by the groove wall during the flow along the groove, thereby forming a spiral airflow movement.

[0058] Example 2: Based on Example 1, please refer to Figures 7 to 10 As shown, a feeding module 11 is installed above the frame body 1, and a hot runner module 12 is installed below the feeding module 11. A cavity preheating mechanism 3 is provided below the hot runner module 12. The cavity preheating mechanism 3 is used to recycle the injection melt remaining after the injection molding is completed. The cavity preheating mechanism 3 includes a driving clamp 31 installed below the hot runner module 12. The lower surface of the driving clamp 31 is evenly fixedly connected with an adjusting rod 32, and the outer wall of the adjusting rod 32 is slidably connected with a storage cylinder 33.

[0059] It should be noted that the inner wall of the storage cylinder 33 is installed with a preheating sleeve 34, and the outside of the preheating sleeve 34 is installed with a spacer layer 35. The preheating sleeve 34 is composed of boron nitride ceramic material as a whole, and the spacer layer 35 is composed of heat-sensitive material as a whole. Connecting pipes are evenly opened on the inner wall of the storage cylinder 33, and one-way valves are evenly installed inside the connecting pipes. In the initial state, the one-way valve is closed.

[0060] Specifically, when the injection melt flows normally, the driving clamp 31 does not move, and the one-way valve inside the connecting pipe of the storage cylinder 33 is in a closed state. Therefore, the piston structure remains disconnected from the nozzle. At this time, the pressure inside the nozzle is mainly determined by the flow pressure of the melt during the injection process. This pressure is used to promote the smooth injection of the melt into the injection cavity shell. Since the area where the piston structure is located is disconnected from the nozzle, its pressure is close to the external environmental pressure or is in a relatively stable lower pressure state. When the injection stage is completed, as the driving clamp 31 moves, the one-way valve inside the connecting pipe of the storage cylinder 33 is opened, thereby connecting the piston structure with the nozzle. At this time, due to the completion of the injection process, the flow pressure of the melt inside the nozzle gradually decreases, but there is still a certain residual pressure. On the side of the piston structure, the adjustment rod 32 performs a displacement operation to actively create a lower pressure area. Under the action of this pressure difference, the residual injection melt is "sucked" to the side of the piston structure, thereby achieving the extraction and removal of the residual injection liquid.

[0061] Since the preheating sleeve 34 is configured to be a boron nitride ceramic material, and there are many bonds between atoms or ions in the crystal structure of boron nitride ceramics, the bonding force between atoms or ions in the boron nitride ceramic material is relatively strong, which enables the boron nitride ceramic material to effectively transfer heat energy. Therefore, when the equipment is before injection molding or during injection molding, the preheating sleeve 34 will guide the heat from the heat source in the hot runner module 12 to the nozzle position.

[0062] Since the spacer layer 35 is made of a thermosensitive material, the thermosensitive material is a shape memory alloy. When heated, it will undergo a change in shape, including deformation such as expansion, and can return to its original shape when the temperature drops. Specifically, it is a nickel-titanium shape memory alloy. The nickel-titanium shape memory alloy is mainly composed of nickel and titanium, wherein the nickel content is approximately 49% to 51% atomic percentage, and correspondingly, the titanium Ti content is also controlled at approximately 49% to 51% atomic percentage. When it is subjected to the input of thermal energy, the molecules will absorb this part of the thermal energy and convert it into molecular thermal motion. The molecular thermal motion will weaken the interaction force between the molecules and change the equilibrium position between the molecules, thereby causing the volume of the material to increase, i.e., thermal expansion.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding production device for automobile plastic tubes, comprising a frame body (1), a drive module (13) being installed below the frame body (1), and characterized in that: A dynamic vibrating injection mechanism (2) is provided above the driving module (13), and the dynamic vibrating injection mechanism (2) is used for continuously and dynamically guiding the flow of the injection melt; The dynamic vibrating injection mechanism (2) comprises an active gear ring disk (21) mounted above the driving module (13), a driven gear set (22) mounted inside the active gear ring disk (21), an injection molded frame (23) mounted above each of the driven gear sets (22), an inner support shaft (24) rotatably connected to each of the injection molded frames (23), and elastic members (25) uniformly mounted on the inner wall of the injection molded frame (23); The injection molded frame (23) is cylindrical in shape as a whole, and the inner wall of the injection molded frame (23) is provided with a thread groove (26); A feeding module (11) is installed above the frame body (1), a hot runner module (12) is installed below the feeding module (11), a cavity preheating mechanism (3) is provided below the hot runner module (12), the cavity preheating mechanism (3) is used to recycle the injection melt remaining after the injection molding is completed, and the cavity preheating mechanism (3) includes a driving plate (31) installed below the hot runner module (12), the lower surface of the driving plate (31) is evenly fixedly connected to the regulating rod (32), and the outer wall of the regulating rod (32) is slidably connected to the storage cylinder (33); The inner side wall of the storage cylinder (33) is installed with a preheating sleeve (34), and the outside of the preheating sleeve (34) is installed with a spacer layer (35), the preheating sleeve (34) is entirely composed of a boron nitride ceramic material, and the spacer layer (35) is entirely composed of a heat-sensitive material; The storage cylinder (33) is located outside the nozzle in the hot runner module (12), the storage cylinder (33) and the nozzle in the hot runner module (12) are connected via a connecting pipe, and the preheating sleeve (34) is connected to the heating source in the hot runner module (12).

2. The injection molding production equipment for automobile plastic tubes according to claim 1, characterized in that: The driven gear set (22) as a whole comprises no less than four gears, and the driving gear ring disk (21) and the gears in the driven gear set (22) are all in meshing engagement.

3. The automobile plastic tube injection molding production equipment according to claim 1, characterized in that: Slots are evenly formed on the upper surfaces of the gears in the driven gear set (22), and cylindrical protrusions are fixedly connected at positions corresponding to the slots on the lower surface of the injection molded skeleton (23), and the driven gear set (22) and the injection molded skeleton (23) are movably connected via the slots and the cylindrical protrusions.

4. The automobile plastic tube injection molding production equipment according to claim 1, characterized in that: The outer wall of the inner support shaft (24) is evenly and fixedly connected with symmetrical inclined panels. The elastic member (25) as a whole comprises a metal ball and an elastic rope. The elastic ropes in the elastic member (25) are all fixedly connected to the inner wall of the injection-molded skeleton (23). The symmetrical inclined panels on the outer wall of the inner support shaft (24) are all located on the movement path of the metal ball in the elastic member (25).

5. The automobile plastic tube injection molding production equipment according to claim 1, characterized in that: The inner side wall of the storage cylinder (33) is evenly provided with connecting pipes, and one-way valves are evenly installed inside the connecting pipes. In the initial state, the one-way valves are in a closed state.

6. The automobile plastic tube injection molding production equipment according to claim 1, characterized in that: The driving module (13) comprises a driving motor, a driving cylinder, an injection molding cavity shell and a guide rail assembly. The active gear ring disk (21) is integrally fixedly connected to the outer wall of the output shaft end of the driving motor in the driving module (13). The injection molding cavity shell in the driving module (13) is in a separated state in an initial state, and the injection molding skeleton (23) is integrally located at the center of the injection molding cavity shell in the driving module (13).

7. The automobile plastic tube injection molding production equipment according to claim 1, characterized in that: The feeding module (11) includes a funnel container and a screw feeder, the hot runner module (12) includes a hot runner plate, a nozzle and a heating source, and the feeding output end in the feeding module (11) is connected to the hot runner plate input end in the hot runner module (12).

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