Integrated injection molding device for metal-plastic composite car lamp frame shell

Abstract

The invention relates to the technical field of hollow part production, and discloses a metal-plastic composite car lamp frame shell integrated injection molding device which comprises an injection molding machine, a movable mold and a fixed mold are installed in the injection molding machine, an external manipulator and an external cooling module are installed outside the injection molding machine, and two fixing holes are symmetrically formed in the outer surface of the movable mold; an injection molding assembly is arranged in the injection molding machine, the injection molding assembly comprises not less than two metal pipes and not less than four extension pipes, and in the cooling process, the metal pipes are cooled from inside to outside based on the physical characteristics of the metal pipes; by means of the cooling mode, the middle of the molding material is cooled and shrunk firstly, the situation that the outer layer is solidified firstly due to the fact that cooling is conducted from the outside to the inside of the cavity traditionally is changed, when the internal material is cooled and shrunk, limitation of the solidified outer layer material is avoided, and therefore the problem that cavities are generated due to inconsistent shrinkage is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of hollow part injection molding, in particular to a metal-plastic composite vehicle lamp frame shell integrated injection molding device. Background Art

[0002] The integrated injection molding device for the headlight frame and shell injects molten plastic into the mold cavity and cools and solidifies it under certain conditions to obtain the required headlight frame and shell product.

[0003] However, there are still some problems with the existing injection molding devices: First, the existing injection molding equipment injects heated plastic material into the mold cavity and then cools it to form. The cooling is carried out from the outside of the cavity to the inside. The external material first contacts the low temperature and solidifies first, while the internal material is still in a liquid or semi-liquid state at a higher temperature. As the internal material cools and shrinks, it cannot shrink freely due to the limitation of the external solidified material. This inconsistent shrinkage produces two serious consequences: voids and solidification stress.

[0004] In terms of voids, when the internal material shrinks, the external solidifying material blocks it, and there is not enough material to fill the shrinkage space, resulting in voids inside the product, which seriously affects the structural integrity and strength of the lamp frame shell. The curing stress is also extremely harmful. The uneven cooling causes different parts of the material to shrink to different degrees, thereby generating stress inside. Since the lamp frame shell is located outside the car, it will be affected by external factors such as drastic temperature changes and wind and sand erosion under long-term use. The lamp frame shell structure that originally has curing stress is very easy to deform, thereby affecting the lighting effect and even damaging the entire lamp assembly, increasing the owner's use and maintenance costs.

[0005] When the car encounters a minor collision, the existing injection molding process causes defects in the lamp frame shell structure and the entire car cover is easy to break. Minor collisions are inevitable in daily driving of cars. The lamp frame shell with a normal structure should be able to withstand the pressure of minor collisions, but the internal voids and solidification stress caused by the existing process weaken the structural strength. The external force of a minor collision will exceed its bearing limit, causing the car cover to break, which not only affects the appearance, but also damages the internal circuits and optical components of the car lights, increases maintenance costs, and endangers normal driving safety.

[0006] After the injection molding equipment is used, cleaning the cavity is an important part of ensuring the normal operation of the equipment and the quality of subsequent injection molding products. Air gun cleaning is the most commonly used cleaning method. In actual application, the airflow ejected by the air gun usually acts vertically on the cavity surface. Even if the operator tilts the air gun to use it, it is difficult to completely avoid the airflow from damaging the cavity. This is because the impact force of the air gun airflow is relatively concentrated. When it acts on the cavity, especially when there are some fragile or high-precision parts on the cavity surface, it is easy to cause damage, resulting in texture wear, thin wall deformation and other problems, and affecting the dimensional accuracy and surface quality of the cavity, and thus affecting the molding quality of subsequent injection molding products.

[0007] At the same time, in order to avoid airflow damage to the cavity, operators often choose to reduce the pressure of the air gun. However, although this practice protects the cavity to a certain extent, it brings another serious problem, that is, the cleaning effect of some attached stains inside the cavity becomes very unobvious. During the injection molding process, various stains will remain inside the cavity, such as sticky attachments generated by the plastic melt during the cooling process, impurity particles mixed in the plastic, and dust in the production environment. These attached stains have a certain adhesion to the cavity surface. When the air gun pressure is reduced, the impact force of the airflow is not enough to overcome this adhesion, and the stains cannot be effectively removed from the cavity surface. This will not only cause the stains inside the cavity to continue to accumulate, but more importantly, the presence of stains will form a heat-insulating layer on the cavity surface, which makes the heat generated during the injection molding process unable to be dissipated in time, thereby affecting the injection molding cycle and efficiency.

[0008] To this end, the present invention proposes a metal-plastic composite vehicle lamp frame shell integrated injection molding device. Summary of the invention

[0009] The object of the present invention is to provide a metal-plastic composite vehicle lamp frame shell integrated injection molding device to solve the problems raised in the above background technology.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a metal-plastic composite lamp frame integrated injection molding device, comprising an injection molding machine, wherein a movable mold and a fixed mold are respectively installed inside the injection molding machine, an external manipulator and an external cooling module are installed outside the injection molding machine, and two fixing holes are symmetrically provided on the outer surface of the movable mold. An injection molding assembly is arranged inside the injection molding machine, and the injection molding assembly includes no less than two metal tubes and no less than four extension tubes; every two extension tubes are arranged as a group, and each group of extension tubes are fixedly connected to the outer surface of the metal tube matched therewith; each of the metal tubes is clamped into the fixing hole through the extension tube on its surface, and the metal tubes are mutually adapted to the shape of the movable mold.

[0011] Preferably, each group of the extension tubes is arranged on the upper part of the metal tube, and the extension tubes in each group are respectively distributed on both sides of the metal tube.

[0012] Preferably, the ends of the extension tubes away from the metal tubes are inclined obliquely downward.

[0013] Preferably, each of the metal tubes is provided with a plum blossom groove inside, and each of the metal tubes is provided with flow grooves arranged in a circular shape and at equal intervals on the outer edge of the plum blossom groove.

[0014] Preferably, the number of notches of the hexalobular socket matches the number of wires.

[0015] Preferably, the outer surface of each metal tube is fixedly connected with snap-fit ​​protrusions at equal intervals.

[0016] Preferably, the metal tube is made of copper.

[0017] Preferably, an air gun is installed outside the injection molding machine, and a cleaning component is arranged outside the air gun. The cleaning component includes a spiral interface, and the spiral interface is connected to the output end of the air gun, and a spiral groove is provided inside the spiral interface.

[0018] Preferably, the spiral interface includes a first interface and a second interface, both of which are clamped at the output end of the air gun, a protrusion is fixedly connected to the outer surface of the first interface, and a recess is provided on the outer surface of the second interface, the first interface and the second interface are clamped to each other through the cooperation of the protrusion and the recess, and the side of the first interface and the second interface away from the air gun can also be clamped to the output end of the air gun.

[0019] Preferably, the spiral groove gradually expands on one side close to the output end of the air gun.

[0020] Preferably, the injection molding machine includes a driving unit, a loading module and an injection molding module.

[0021] Preferably, a loading frame is installed on the outer surface of the injection molding machine, and except for the metal tube installed in the fixing hole, the rest of the metal tubes are placed in the loading frame.

[0022] Compared with the prior art, the beneficial effects of the present invention are: 1. During the cooling process, the metal tube is cooled from the inside to the outside based on the physical properties of the metal tube itself. Since the metal tube is located inside the plastic material, this cooling method causes the middle part of the plastic material to cool and shrink first, changing the traditional cooling from the outside of the cavity to the inside, which causes the outer layer to solidify first. When the internal material cools and shrinks, it will not be restricted by the already solidified outer layer material, thereby effectively preventing the problem of voids caused by inconsistent shrinkage. At the same time, this uniform cooling method also avoids excessive differences in the degree of shrinkage of materials in different parts, thereby preventing the generation of solidification stress. In addition, the setting of the extension tube provides a wiring channel for the wires, so that the wires can be reasonably laid out along the extension tube inside the metal tube. This wiring method not only utilizes the space inside the metal tube, but the metal tube can also provide physical support for the wires, thereby ensuring the stable layout of the wires in the lamp frame shell, which is an advantage that the existing injection molding process does not have.

[0023] Among them: the present invention greatly improves space utilization by arranging the wires inside the metal tube. Compared with the traditional method, it reduces the installation of fixings required for the wires, avoids space waste caused by the space occupied by fixings, and makes the internal space layout of the lamp frame shell more compact and reasonable.

[0024] Among them: In daily use, the vehicle will experience various vibrations and shaking. The traditional wiring method easily causes the wires to become loose, while the present invention can effectively prevent this from happening through the plum blossom slot, ensuring that the wires are always in a stable state and ensuring the normal operation of the headlights.

[0025] Among them: the setting of the metal tube plays an important role in reducing electromagnetic interference to the wires. Based on the physical properties of the metal tube itself, it can effectively shield electromagnetic interference and make the wire transmission signal more stable.

[0026] Among them: Based on the good thermal conductivity of metal, metal tubes can help wires dissipate heat during long-term use. When the wires are energized and generate heat, the heat can be quickly conducted away through the metal tubes, preventing the wires from experiencing performance degradation or even damage due to overheating, thereby improving the service life and safety of the wires.

[0027] Among them: when the car encounters a slight collision, the existing injection molding process causes the lamp frame shell structure to have defects and is easy to break, while the metal tube in the present invention can enhance the overall structural strength of the lamp frame shell, so that it can withstand a certain external force impact, reduce the risk of the car cover breaking, ensure the safety of the internal circuits and optical components of the car lamp, reduce maintenance costs, and ensure normal driving safety.

[0028] Among them: the existence of the snap-fitting protrusions increases the contact area between the metal tube and the plastic material, thereby increasing the stability between the two, making the metal tube more firmly fixed in the lamp frame shell and less likely to move, thereby ensuring the stability of the entire structure and improving the overall quality of the lamp frame shell.

[0029] Among them: the design of the extension tube tilting downward makes it difficult for water vapor and dust to invade the wires. In the use environment of the car, water vapor and dust are inevitable. The traditional wiring method easily exposes the wires to water vapor and dust, causing damage to the wires. The present invention can effectively block water vapor and dust by designing the extension tube tilting downward, protect the wires, and extend the service life of the wires.

[0030] Among them: since the extension tube is arranged on the upper part of the metal tube, the wires are easier to be wired under the guidance of gravity and the metal tube, making the wiring process more convenient and efficient, reducing the difficulty and time cost of wiring, and improving production efficiency.

[0031] Among them: the setting of the flow channel allows air to flow in the metal tube. This air flow not only provides a certain air flow channel, but also provides a certain expansion space when the wires heat up. This design can adapt to the changes of wires under different working conditions, avoid squeezing the surrounding structure due to the expansion of the wires, and ensure the safety and stability of the entire structure.

[0032] 2. Through the coordination of the spiral interface and the spiral groove, the gas ejected from the air gun is spiral, and the spiral airflow uses the characteristics of spiral rotation to clean the cavity. Compared with the traditional airflow that acts vertically on the cavity surface, the rotational force is more dispersed, and it will not damage the cavity due to concentrated impact force like the traditional air gun airflow. In particular, it can play a good protective role for the fragile or high-precision parts of the cavity surface. At the same time, under the action of the rotation trend, the airflow can better act on the stains, enhance the cleaning effect of the stains, and effectively avoid the accumulation of stains inside the cavity due to incomplete cleaning. Problems such as, thereby ensuring the dimensional accuracy and surface quality of the cavity, and ensuring the molding quality of subsequent injection molding products.

[0033] Among them: the detachable design of the first interface and the second interface is convenient for cleaning the spiral interface. After long-term use, some stains will remain inside the spiral interface. By splitting the spiral interface into the first interface and the second interface, the inside can be easily and thoroughly cleaned, preventing secondary contamination caused by residual stains inside the spiral interface, and further ensuring the cleanliness of the cavity cleaning.

[0034] Among them: both ends of the spiral interface can be snapped onto the air gun, and the spiral groove gradually expands on the side close to the output end of the air gun. During the cleaning process, different directions of the spiral interface can be selected according to the specific situation of the cavity for cleaning operations, which can further reduce the risk of damage to the cavity and ensure that better cleaning effects can be achieved under different cleaning requirements.

[0035] Among them: the cleaning component has significant advantages in cost and manufacturing. It is low in cost and easy to manufacture, which is very important for injection molding equipment. While ensuring that the cavity cleaning problem can be effectively solved, the lower cost can reduce the overall manufacturing cost of the equipment and improve production efficiency. The simplicity of manufacturing is also conducive to large-scale production and assembly in the production process, reducing production cycle and cost, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front three-dimensional schematic diagram of the main structure of the present invention.

[0037] Figure 2 It is a rear perspective schematic diagram of the main structure of the present invention.

[0038] Figure 3 It is a sectional stereoscopic schematic diagram of the main structure of the present invention.

[0039] Figure 4 It is a partial cross-sectional perspective schematic diagram of the injection molding component in the present invention.

[0040] Figure 5 For the present invention Figure 4 A is an enlarged schematic diagram of the structure in the middle.

[0041] Figure 6 It is a three-dimensional schematic diagram of the metal tube in the present invention.

[0042] Figure 7 It is a three-dimensional schematic diagram of the metal tube in the present invention.

[0043] Figure 8 It is a schematic cross-sectional perspective view of the cleaning component in the present invention.

[0044] Fig. 9 For the present invention Figure 8 A three-dimensional schematic diagram of the enlarged structure at point B in the middle.

[0045] Fig.10 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C in the middle.

[0046] Fig.11 It is an exploded stereoscopic schematic diagram of the spiral interface in the present invention.

[0047] In the figure: 11, injection molding machine; 12, movable mold; 13, fixed mold; 14, air gun.

[0048] 2. Injection molding component; 21. Metal tube; 22. Extension tube; 23. Plum blossom groove; 24. Runner; 25. Snap-fit ​​convex point.

[0049] 3. Cleaning assembly; 31. Spiral interface; 32. Spiral groove; 311. First interface; 312. Second interface. DETAILED DESCRIPTION

[0050] The present invention specifically relates to an injection molding process of a vehicle lamp frame shell having a structure combining a metal frame and an injection-molded shell. The vehicle lamp frame shell comprises a metal tube as a frame and a shell formed during the injection molding process of a plastic material.

[0051] Specifically, the metal tube acts as a skeleton, providing strong structural support for the headlight frame, significantly improving the overall structural strength of the headlight. In actual usage scenarios, vehicles will encounter various complex road conditions and external impacts during driving, and this headlight frame with a metal skeleton can effectively resist these impacts, ensuring that the headlight remains intact and not easily damaged when it is hit or vibrated, thereby ensuring driving safety and extending the service life of the headlight.

[0052] In addition, the inside of the metal tube can also be used as a wiring channel. In the electrical system of modern cars, the wiring of the headlights needs to meet the requirements of efficiency, safety and concealment. The wiring channel inside the metal tube provides an orderly and protected space for the laying of wires, avoiding the wear, corrosion and interference of the wires exposed to the outside. At the same time, the design of the built-in wiring channel makes the internal structure of the headlights neater and more compact, which is conducive to improving the assembly efficiency and overall performance of the headlights.

[0053] More importantly, in the prior art, the lamp frame shell often has solidification stress and void problems during the cooling process, which not only affects the mechanical properties of the lamp frame shell, but also causes appearance defects. In the present invention, the metal tube has good thermal conductivity and can dissipate heat more evenly during the injection molding cooling process, effectively reducing the solidification stress caused by uneven temperature. At the same time, the presence of the metal tube can also play a certain guiding and supporting role in the flow of plastic melt during the injection molding process, avoiding the formation of voids, thereby improving the quality and reliability of the lamp frame shell.

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0055] It should be noted that the driving unit is used to provide the movable mold 12 with the function of movement, the loading module is used to provide the injection molding machine 11 with the function of plastic raw materials, the injection molding module provides the function of injecting the plastic raw materials between the fixed mold 13 and the movable mold 12, the external robot provides the function of loading the metal tube 21 and unloading the formed headlight frame shell, and the external cooling module provides the function of cooling the headlight frame shell. The working principle and specific structure of the above structure are all existing technologies. Therefore, in view of the versatility of the above structure, its specific principle will not be repeated later.

[0056] In addition, the injection molding module adopts an integral open hot runner system, which can improve the quality and efficiency of injection molding and facilitate maintenance and cleaning.

[0057] Example 1, please refer to Figures 1 to 6 As shown, a metal-plastic composite lamp frame integrated injection molding device includes an injection molding machine 11, wherein a movable mold 12 and a fixed mold 13 are respectively installed inside the injection molding machine 11, an external manipulator and an external cooling module are installed outside the injection molding machine 11, and two fixing holes are symmetrically provided on the outer surface of the movable mold 12. An injection molding component 2 is arranged inside the injection molding machine 11, and the injection molding component 2 includes no less than two metal tubes 21 and no less than four extension tubes 22; every two extension tubes 22 are arranged as a group, and each group of extension tubes 22 are fixedly connected to the outer surface of the metal tube 21 matched therewith; each metal tube 21 is clamped into the fixing hole through the extension tube 22 on its surface, and the metal tubes 21 are mutually adapted to the shape of the movable mold 12.

[0058] Please refer to Figures 1 to 7 As shown, each group of extension tubes 22 is arranged on the upper part of the metal tube 21, and the extension tubes 22 in each group are respectively distributed on both sides of the metal tube 21, and the ends of the extension tubes 22 away from the metal tube 21 are inclined downward, and each metal tube 21 is provided with a plum blossom groove 23 inside, and each metal tube 21 and the outer edge of the plum blossom groove 23 are provided with flow grooves 24 arranged in a circular shape and equidistantly, and the number of notches of the plum blossom groove 23 matches the number of wires. The outer surface of each metal tube 21 is fixedly connected with snap-fitting protrusions 25 at equal intervals. The material of the metal tube 21 is copper. The injection molding machine 11 includes a drive unit, a feeding module and an injection molding module. A feeding frame is installed on the outer surface of the injection molding machine 11. Except for the metal tube 21 installed in the fixing hole, the remaining metal tubes 21 are placed in the feeding frame.

[0059] Specifically, first, the driving unit starts to work and drives the movable mold 12 to move toward the fixed mold 13 until the two are close to and tightly fit together, thereby forming a sealed cavity between the movable mold 12 and the fixed mold 13. At this time, the loading module begins to provide the injection molding module with pre-treated plastic raw materials. While the cavity is being formed, the injection molding module injects the plastic raw materials heated to a suitable temperature into the cavity between the movable mold 12 and the fixed mold 13 through an integrated open hot runner system.

[0060] In this process, since the metal tube 21 is clamped in the fixing hole through the extension tube 22, and the shapes of the metal tube 21 and the movable mold 12 are adapted to each other, when the plastic raw material is injected into the cavity, the plastic material will wrap the metal tube 21. In addition, since there are snap-fitting protrusions 25 on the surface of the metal tube 21, the plastic material will form grooves that match the snap-fitting protrusions 25 during the flow process, thereby enhancing the connection between the plastic material and the metal tube 21.

[0061] What is particularly important is that during the injection molding process, the plastic raw material is in a high temperature state, and the heat needs to be quickly and evenly distributed in the cavity to ensure good molding of the plastic raw material. The metal tube 21 has good thermal conductivity due to its copper material itself, and the increased surface area of ​​the snap-fit ​​protrusion 25 further increases the contact area between the metal tube 21 and the plastic raw material. According to the principle of heat conduction, the larger the contact area, the higher the efficiency of heat transfer. When the heat in the plastic raw material is transferred to the metal tube 21, the metal tube 21 can quickly conduct the heat away, making the temperature distribution in the cavity more uniform, which helps the plastic raw material maintain a consistent temperature and flow state in the process of wrapping the metal tube 21, avoiding problems such as uneven solidification of the plastic raw material and internal defects caused by local temperature differences.

[0062] After the plastic raw material is injected into the cavity, the operator starts the external cooling module to cool the raw material in the cavity. Since the metal tube 21 is made of copper, copper has excellent thermal conductivity. During the cooling process, the heat will be quickly conducted out through the metal tube 21. Since the thermal conductivity of the metal tube 21 is much faster than that of the surrounding plastic material, the cooling will start from the location of the metal tube 21. This cooling method starting from the inside allows the injection molded part to gradually shrink from the inside to the outside during cooling, which can effectively avoid the formation of voids inside the injection molded part. At the same time, the cooling method starting from the inside can make the entire injection molded part cool and shrink more evenly and reduce the generation of solidification stress.

[0063] When cooling is completed, the driving unit drives the fixed mold 13 to reset. At this time, the external robot removes the formed headlight frame shell from the movable mold 12, and then takes out the new metal tube 21 from the loading frame and places it on the fixed hole on the surface of the movable mold 12, so that the position of the new metal tube 21 is relatively fixed relative to the fixed mold 13, thereby preparing for the next injection molding process. At this time, the next batch of injection molding production operations can be carried out.

[0064] It should be noted that, firstly, each metal tube 21 is provided with a plum blossom slot 23, the number of which matches the number of wires. This design reserves space for subsequent wire installation and facilitates electrical connection and other operations after the lamp frame is formed.

[0065] When performing wiring operations, the operator can first prepare wires that match the number of notches in the plum blossom slot 23. At the same time, since the extension tube 22 is located above the metal tube 21, using this structural feature, the operator can insert the wires from one side of the extension tube 22 along the connection between the extension tube 22 and the metal tube 21. Under the action of gravity, the wires are easily introduced into the plum blossom slot 23 inside the metal tube 21. Finally, the operator takes out the other end of the placed wires from the other extension tube 22.

[0066] Secondly, after the lamp cover and the lamp are installed, there will inevitably be water vapor and dust in the use environment. The downward tilted design of the extension tube 22 becomes a natural protective layer in this case. Water vapor and dust tend to settle downward in a natural state. The downward tilted extension tube 22 can block a part of the water vapor and dust from directly entering the metal tube 21. When water vapor and dust contact the extension tube 22, due to the tilt angle of the extension tube 22, they will slide along the outer surface of the extension tube 22 and will not easily enter the plum blossom groove 23 inside the metal tube 21, thereby reducing the risk of erosion and contamination of wires and electrical connections by water vapor and dust, improving the stability and reliability of the lamp electrical system, and extending the service life of the lamp.

[0067] Again, copper is a metal material with good electrical conductivity and high electrical conductivity. In the electrical system of the headlight, an electromagnetic field will be generated when current passes through the wire. Since the metal tube 21 is made of copper, it can shield the electromagnetic field generated by the wire. According to the principle of electromagnetic shielding, when the electromagnetic field encounters a conductor, an induced current will be generated on the surface of the conductor. This induced current will generate an electromagnetic field in the opposite direction of the original electromagnetic field, thereby offsetting or weakening the impact of the original electromagnetic field on the outside world. In this case, the copper metal tube 21 is like an electromagnetic shielding cover, which effectively reduces the interference of the electromagnetic field generated by the wire on other surrounding electronic components or equipment, ensuring the normal operation of the electronic system inside the headlight. On the other hand, the thermal conductivity of copper is relatively high among common metals. When the wire generates heat during operation, the heat will be transferred to the surrounding environment through heat conduction. Since the metal tube 21 is made of copper and tightly wraps the wire, the heat generated by the wire can be quickly conducted to the metal tube 21. According to Fourier's law, the high thermal conductivity allows the heat to diffuse quickly in the metal tube 21, and the copper metal tube 21 has a large contact area with the surrounding air, so the heat can be further dissipated into the air through thermal convection. This rapid heat dissipation feature can effectively prevent the wire from being damaged due to overheating, thereby ensuring the safety and stability of the wire and the entire headlight electrical system.

[0068] Finally, the flow groove 24 provides an additional air flow area for the inside of the metal tube 21, that is, the inside of the molded headlight cover. During use, air can flow freely in the flow groove 24, which helps to regulate the micro-environment temperature around the wires. When the wires are overheated, the wires will increase in volume due to thermal expansion. At this time, the flow groove 24 can provide a certain expansion space to prevent the wires from being damaged by excessive squeezing due to expansion.

[0069] Example 2, based on Example 1, please refer to Figures 8 to 10 As shown, an air gun 14 is installed outside the injection molding machine 11, and a cleaning component 3 is arranged outside the air gun 14. The cleaning component 3 includes a spiral interface 31, which is clamped on the output end of the air gun 14, and a spiral groove 32 is opened inside the spiral interface 31.

[0070] Please note that, please refer to Figures 8 to 11 As shown, the spiral interface 31 includes a first interface 311 and a second interface 312, and the first interface 311 and the second interface 312 are both clamped at the output end of the air gun 14. A protrusion is fixedly connected to the outer surface of the first interface 311, and a recess is provided on the outer surface of the second interface 312. The first interface 311 and the second interface 312 are clamped to each other through the cooperation of the protrusion and the recess, and the side of the first interface 311 and the second interface 312 away from the air gun 14 can also be clamped at the output end of the air gun 14, and the side of the spiral groove 32 close to the output end of the air gun 14 gradually expands.

[0071] Specifically, after a batch of vehicle lamp covers are injection molded, some plastic residues or other impurities will remain inside the movable mold 12 and the fixed mold 13 , and they need to be cleaned for the next round of injection molding production.

[0072] At this time, the operator can hold the air gun 14 to clean the surface. When the operator starts the air gun 14 , air flow is ejected from the output end of the air gun 14 into the spiral interface 31 .

[0073] When the airflow enters the spiral groove 32, according to the principles of fluid mechanics, under the constraint of the wall of the spiral groove 32, the flow rate of the airflow gradually increases and is forced to form a spiral fluid along the shape of the spiral groove 32. The spiral fluid itself has a tendency to rotate, so when it impacts the cavity surface, the impact force is not concentrated on one point, but dispersed on a spiral trajectory. Compared with the vertical airflow, the impact force on the cavity surface is much smaller, thereby greatly reducing the risk of damage to the cavity surface. At the same time, under the tendency of the spiral fluid itself to rotate, it has a better effect on cleaning stubborn stains. This is because the spiral fluid can generate shear force and friction force on the stains from multiple angles during the rotation process, just like a rotating brush, which can gradually peel off the stubborn stains from the cavity surface, instead of relying solely on the impact force in a single direction like the vertical airflow to try to wash away the stains. This combination of multi-directional forces makes the spiral fluid more effective in cleaning stubborn stains.

[0074] After the cavities of the movable mold 12 and the fixed mold 13 are cleaned using the air gun 14, the operator can return them to their original positions.

[0075] It should be noted that after the spiral interface 31 is used, impurities such as plastic debris, dust particles, and some tiny mold release agent residues brought out from the cavity will remain inside it. At this time, the operator can remove it from the air gun 14 and split the spiral interface 31 into a first interface 311 and a second interface 312, so as to thoroughly clean it and prevent secondary contamination.

[0076] In addition, in the initial state, the expanded side of the spiral groove 32 is located near the air gun 14. At this time, the airflow flows through expansion and then contraction. In this case, the spiral interface 31 is positively connected to the air gun 14, which is more suitable for dealing with non-stubborn stains. When the airflow is ejected from the air gun 14 and enters the spiral interface 31, since the side of the spiral groove 32 near the air gun 14 is expanded, the airflow first enters this expansion area. According to the principles of fluid mechanics, the flow rate of the airflow in this area will be relatively reduced and the pressure will be relatively increased. Then the airflow flows to the contraction part, and the flow rate gradually increases. On the whole, the flow rate of the spiral fluid generated in this state is relatively gentle, and the spiral angle is relatively gentle. The non-stubborn stains have weak adhesion to the surface of the cavity, and do not require a strong impact force to remove them. This spiral fluid with a slow flow rate and a gentle spiral angle can cover a larger area in a relatively gentle way, just like a gentle breeze blowing, which is enough to blow away those stains with weak adhesion from the surface of the cavity.

[0077] When facing more stubborn stains, the spiral interface 31 can be reversely connected to the air gun 14. After reverse connection, the contracted side of the spiral groove 32 is close to the air gun 14. At this time, the airflow flows through contraction and then expansion. When the airflow enters the spiral groove 32, since the spiral groove 32 close to the air gun 14 is contracted, when the airflow enters this area, the flow rate will rapidly accelerate and the pressure will also rapidly increase. Then the airflow flows to the expansion part. In this process, the original spiral groove 32 structure will produce a special spiral fluid under the action of the reverse airflow. The spiral angle and flow rate distribution of this spiral fluid are different from those when it is connected in the forward direction. Its spiral angle becomes steeper, and the flow rate is enhanced in the local area due to the accumulation of pressure. Stubborn stains often have a strong adhesion to the surface of the cavity, and a large force is required to destroy and remove them. This spiral fluid with a fast flow rate and a steep spiral angle can generate a greater lateral shear force when impacting stubborn stains, just like a sharp scraper, which can effectively destroy the strong connection between the stain and the surface of the cavity, thereby successfully removing stubborn stains.

[0078] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0079] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal-plastic composite vehicle lamp frame integrated injection molding device, comprising an injection molding machine (11), wherein a movable mold (12) and a fixed mold (13) are respectively installed inside the injection molding machine (11), and an external manipulator and an external cooling module are installed outside the injection molding machine (11), characterized in that: The outer surface of the movable mold (12) is symmetrically provided with two fixing holes. The injection molding machine (11) is provided with an injection molding assembly (2) inside. The injection molding assembly (2) comprises no less than two metal tubes (21) and no less than four extension tubes (22). Every two extension tubes (22) are arranged as a group. Each group of extension tubes (22) is fixedly connected to the outer surface of the metal tube (21) matched therewith. Each metal tube (21) is clamped into the fixing hole through the extension tube (22) on its surface. The metal tubes (21) are mutually adapted to the shape of the movable mold (12).

2. The metal-plastic composite lamp frame integrated injection molding device according to claim 1, characterized in that: Each group of extension tubes (22) is arranged on the upper part of the metal tube (21), and the extension tubes (22) in each group are respectively distributed on both sides of the metal tube (21).

3. The metal-plastic composite lamp frame integrated injection molding device according to claim 1, characterized in that: The ends of the extension tubes (22) that are away from the metal tube (21) are inclined obliquely downward.

4. The metal-plastic composite lamp frame integrated injection molding device according to claim 1, characterized in that: Each of the metal tubes (21) is provided with a plum blossom groove (23) inside, and each of the metal tubes (21) is provided with flow grooves (24) arranged in an annular manner and at equal intervals on the outer edge of the plum blossom groove (23).

5. The metal-plastic composite lamp frame integrated injection molding device according to claim 4, characterized in that: The number of notches of the hexalobular socket (23) matches the number of electrical wires.

6. The metal-plastic composite vehicle lamp frame integrated injection molding device according to claim 1, characterized in that: The outer surface of each metal tube (21) is fixedly connected with buckling protrusions (25) at equal intervals.

7. The metal-plastic composite lamp frame integrated injection molding device according to claim 1, characterized in that: The metal tube (21) is made of copper.

8. The metal-plastic composite lamp frame integrated injection molding device according to claim 1, characterized in that: An air gun (14) is installed outside the injection molding machine (11), and a cleaning component (3) is arranged outside the air gun (14). The cleaning component (3) comprises a spiral interface (31), and the spiral interface (31) is snap-connected to the output end of the air gun (14). A spiral groove (32) is provided inside the spiral interface (31).

9. The metal-plastic composite vehicle lamp frame integrated injection molding device according to claim 8, characterized in that: The spiral interface (31) comprises a first interface (311) and a second interface (312), the first interface (311) and the second interface (312) are both snap-fitted to the output end of the air gun (14), a protrusion is fixedly connected to the outer surface of the first interface (311), and a recess is provided on the outer surface of the second interface (312), the first interface (311) and the second interface (312) are snap-fitted to each other through the cooperation of the protrusion and the recess, and the side of the first interface (311) and the second interface (312) away from the air gun (14) can also be snap-fitted to the output end of the air gun (14).

10. The metal-plastic composite vehicle lamp frame integrated injection molding device according to claim 9, characterized in that: The spiral groove (32) gradually expands on a side close to the output end of the air gun (14).

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