A device and method for manufacturing automobile collision dummy skin

Abstract

The present application relates to the field of automobile collision dummies, and specifically, to a device and method for manufacturing automobile collision dummy skin. The automobile collision dummy skin manufacturing device includes an external vacuum box assembly, a stirring and filtering barrel assembly, a vacuum defoaming barrel assembly, a vacuum infusion barrel assembly and a central control system; the external vacuum box assembly includes a vacuum pump; the stirring and filtering barrel assembly includes an agitator, and the agitator includes a movably connected pressure fan and a stirring fan, and the pressure fan and the stirring fan overlap during stirring; the pressure fan is perpendicular to the stirring fan during discharge and is parallel to the horizontal plane; the vacuum defoaming barrel assembly includes a liquid spraying device, and the liquid spraying device includes a boosting plate, a boosting spring, a boosting column, a second valve and a guide tube connected in sequence, and the liquid spraying device is used to make the sprayed liquid present a laminar state. The present application can quickly complete skin manufacturing, and can also make defoaming more thorough, improve product qualification rate, and the entire process is automatically controlled, which reduces labor consumption and improves product consistency.

Description

Technical Field

[0001] The present application relates to the field of automobile collision dummies, and in particular to a device and method for manufacturing automobile collision dummy skin. Background Art

[0002] As the demand for automobiles increases, the collision safety of automobiles has received widespread attention from consumers. As a high-end testing equipment for evaluating automobile safety, automobile collision dummies are an important technical weight for measuring automobile collision safety performance. Crash dummies are used instead of real people for collision tests, and the collision safety performance of automobiles is evaluated by damage evaluation. Therefore, the various performances of automobile collision dummies need to have a good degree of bionics, so that the collision test results can be convincing to people. The dummy skin is an important part that affects the performance of the dummy. The manufacturing process of the dummy skin is highly complex and requires a lot of manpower and material resources. Due to the presence of air in the skin manufacturing process and the lack of strict processing technology, more unqualified skin products appear, which affects the overall performance of the dummy.

[0003] Among them, the processes where air has the greatest impact on skin performance are: stirring-defoaming-filtration-defoaming-infusion-defoaming, and finally high-temperature curing to complete the manufacture of dummy skin. However, since the above processes in the current dummy skin manufacturing process, including stirring, filtering, and infusion, are all carried out under non-vacuum conditions, a lot of air is often mixed into the material, causing skin concavities and bulges, unqualified quality, and a large amount of raw material waste, thus affecting the performance of the dummy skin. Due to technical reasons, there is currently no set of equipment that can complete the entire set of processes under vacuum.

[0004] In view of this, this application is hereby filed. Summary of the invention

[0005] The purpose of the present application is to provide a device and method for manufacturing automobile collision dummy skin, so as to solve the problem in the prior art that stirring, filtering and perfusion in the manufacturing of dummy skin cannot be completed in one set of equipment.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a vehicle collision dummy skin manufacturing device, comprising an external vacuum box assembly, and a stirring and filtering barrel assembly, a vacuum defoaming barrel assembly, a vacuum infusion barrel assembly and a central control system arranged in the external vacuum box assembly; the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly are connected in sequence and are all connected to the central control system; the external vacuum box assembly comprises a vacuum pump, and the vacuum pump is respectively connected to the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly;

[0008] The stirring and filtering barrel assembly includes a stirrer, and the stirrer includes a pressure fan and a stirring fan that are movably connected. During stirring, the pressure fan and the stirring fan overlap; during drainage, the pressure fan is perpendicular to the stirring fan and parallel to the horizontal plane;

[0009] The vacuum defoaming barrel assembly includes a liquid spraying device, which includes a boosting plate, a boosting spring, a boosting column, a second valve and a guide pipe connected in sequence, and the liquid spraying device is used to make the sprayed liquid present a laminar flow state.

[0010] As a further preferred technical solution, the stirring and filtering barrel assembly further includes a speed change device, a lifting device, a pressure fan bearing, an inner barrel, an outer barrel, at least two first valves, a filter assembly and a first liquid storage barrel, and the speed change device, the lifting device, the pressure fan bearing and the pressure fan are connected in sequence;

[0011] The liquid spraying device is arranged in the inner barrel, and the inner barrel is arranged in the outer barrel;

[0012] At least two of the first valves are arranged on the outer barrel, the filter assembly is arranged below at least two of the first valves, and the first liquid storage barrel is arranged below the filter assembly.

[0013] As a further preferred technical solution, the stirring and filtering barrel assembly also includes a first tilting platform, and the first liquid storage barrel is arranged on the first tilting platform. The first tilting platform is used to provide an inclined surface for the first liquid storage barrel so that the first liquid storage barrel is placed at an angle.

[0014] As a further preferred technical solution, the vacuum defoaming barrel assembly further includes a first infuser, an anti-sticking wall, a second liquid storage barrel and a second tilting platform, wherein the first infuser is connected to the booster plate; the first infuser is used to be connected to the liquid outlet of the stirring and filtering barrel assembly;

[0015] The anti-sticking wall is arranged on the opposite side of the guide pipe, and is used to prevent liquid splashing and guide the liquid into the second liquid storage barrel;

[0016] The second liquid storage barrel is placed on the second inclined platform, and the second inclined platform is used to provide an inclined surface for the second liquid storage barrel so that the second liquid storage barrel is placed inclined.

[0017] As a further preferred technical solution, the vacuum infusion barrel assembly includes a second infusion device, a pressure gauge, an injection pipe, a third valve, a pressure-sensitive sensor, a third infusion device, a feedback control device, a dummy skin mold bearing space, a restraining ring and a vibrator; the second infusion device is used to be connected to the liquid outlet of the vacuum defoaming barrel assembly;

[0018] The second injector, the pressure gauge, the injection pipe and the third valve are connected in sequence;

[0019] The third valve and the pressure-sensitive sensor are both used to be connected to the dummy skin mold, and the dummy skin mold bearing space is used to place the dummy skin mold; the pressure-sensitive sensor, the feedback control device and the third injector are connected in sequence, and the third injector is also connected to the second injector;

[0020] The clamping ring is arranged on the outside of the bearing space of the dummy skin mold, and is used to clamp the dummy skin mold; the vibrator is arranged above the bearing space of the dummy skin mold, and is used to provide vibration force for the dummy skin mold.

[0021] As a further preferred technical solution, the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly also include a constant temperature controller, and the constant temperature controller is connected to the central control system.

[0022] As a further preferred technical solution, the external vacuum box assembly includes a vacuum pump carrying device, and the vacuum pump carrying device is provided with a sound insulation layer and an exhaust port.

[0023] In a second aspect, the present application provides a method for manufacturing the skin of a car crash dummy, using the above-mentioned car crash dummy skin manufacturing device to perform skin layer slurry perfusion, comprising the following steps:

[0024] Determine the control parameters of the central control system according to the skin layer ingredient ratio; the control parameters of the central control system include the stirring speed of the stirring fan, the opening of the second valve, the filling speed of the first filling device and the filling speed of the second filling device;

[0025] After the raw materials of the skin layer slurry are added into the stirring and filtering barrel assembly, the central control system controls the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum perfusion barrel assembly to operate according to the control parameters of the central control system until the perfusion of the skin layer slurry is completed.

[0026] As a further preferred technical solution, the control parameters of the central control system are determined according to the skin layer ingredient ratio, including:

[0027] The control parameters of the central control system are determined according to the skin layer ingredient ratio and a preset control parameter database, wherein the preset control parameter database includes a mapping relationship between the skin layer ingredient ratio and the central control system control parameters.

[0028] As a further preferred technical solution, the preset control parameter database is constructed in the following manner:

[0029] Determining a first mapping relationship between the raw materials, temperature, stirring speed and stirring time of the skin layer slurry according to the mixing degree of the raw materials of different skin layer slurries at different temperatures, different stirring speeds and different stirring times;

[0030] Determine a second mapping relationship between the skin layer ratio, the temperature, the opening of the second valve and the perfusion speed of the first perfusion device according to the dynamic viscosity of the slurry corresponding to the different skin layer ratios at different temperatures, the opening of the second valve, the perfusion speed of the first perfusion device and the Reynolds number threshold;

[0031] Determine a third mapping relationship between the skin layer ingredient ratio, temperature, perfusion time, perfusion volume, and perfusion speed of the second perfusion device according to the perfusion time of the slurry corresponding to the different skin layer ingredient ratios at different temperatures, the perfusion volume of the different skin layer ingredient ratios, and the perfusion speed of the second perfusion device;

[0032] A preset control parameter database is determined according to the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0033] Compared with the prior art, the beneficial effects of this application are:

[0034] The automobile collision dummy skin manufacturing device provided in the present application includes an external vacuum box assembly, a stirring and filtering barrel assembly, a vacuum defoaming barrel assembly, a vacuum infusion barrel assembly and a central control system. The external vacuum box assembly can provide a vacuum environment for the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly, the vacuum infusion barrel assembly and the central control system. The central control system can control the stirring and filtering, vacuum defoaming and vacuum infusion processes of the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly. The stirring and filtering barrel assembly includes an agitator with a specific structure. When stirring is required, the pressure fan and the stirring fan overlap, and when drainage is required, the pressure fan overlaps. It is perpendicular to the stirring fan and parallel to the horizontal plane, so as to realize the rapid discharge of the liquid. The vacuum defoaming barrel assembly contains a liquid spraying device of a specific structure. Its boosting plate can be used to control the opening and hydraulic pressure of the second valve. When the boosting plate is working, the boosting column increases the hydraulic pressure by delivering hydraulic pressure to the boosting spring. After the liquid spraying is completed, the liquid needs to be refilled, and the boosting spring pulls it back again to realize the functions of boosting and pressure relief. The guide pipe is used to guide the liquid spraying angle. The entire liquid spraying device can make the sprayed liquid present a laminar state. The laminar state can make the gas more fully separated from the liquid and improve the defoaming effect. The above device integrates the stirring and filtering barrel assembly of a specific structure, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly. When in use, the raw materials of the prepared dummy skin slurry can be added to the stirring and filtering barrel assembly. It can not only quickly complete the skin manufacturing and improve the production efficiency, but also make the defoaming more thorough and improve the product qualification rate. The whole process can be automatically controlled, reducing labor consumption and improving product consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 It is a schematic diagram of the overall structure of the automobile collision dummy skin manufacturing device provided by the present application;

[0037] Figure 2 yes Figure 1 The front view of the middle stirring and filtering barrel assembly;

[0038] Figure 3 yes Figure 1 The front view of the middle vacuum defoaming barrel assembly;

[0039] Figure 4 yes Figure 1 The front view of the middle vacuum infusion barrel assembly;

[0040] Figure 5 It is a flow chart of the method for manufacturing the automobile collision dummy skin provided in the present application.

[0041] Icons: 1-external vacuum box assembly; 101-vacuum pump; 102-vacuum pump bearing device; 2-stirring and filtering barrel assembly; 201-pressure fan; 202-stirring fan; 203-speed device; 204-lifting device; 205-pressure fan bearing; 206-inner barrel; 207-outer barrel; 208-first valve; 209-filter assembly; 2091-filter screen; 2092-filter funnel; 2010-first liquid storage barrel; 2011-first tilting platform; 3-vacuum defoaming barrel assembly; 301-boosting plate; 302-boosting spring; 303- Booster column; 304-second valve; 305-guide tube; 306-first infuser; 307-anti-sticking wall; 308-second liquid storage barrel; 309-second tilting table; 3010-pull wire; 4-vacuum infuser barrel assembly; 401-second infuser; 402-pressure gauge; 403-liquid injection pipe; 404-third valve; 405-pressure sensitive sensor; 406-third infuser; 407-feedback control device; 408-dummy skin mold bearing space; 409-beam ring; 4010-vibrator; 5-central control system; 6-constant temperature controller. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work belong to the scope of protection of the present application.

[0043] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] Example 1

[0046] like Figure 1-Figure 4 As shown, this embodiment provides a car collision dummy skin manufacturing device, including an external vacuum box assembly 1, and a stirring and filtering barrel assembly 2, a vacuum defoaming barrel assembly 3, a vacuum infusion barrel assembly 4 and a central control system 5 arranged in the external vacuum box assembly 1; the stirring and filtering barrel assembly 2, the vacuum defoaming barrel assembly 3 and the vacuum infusion barrel assembly 4 are connected in sequence and are all connected to the central control system 5; the external vacuum box assembly 1 includes a vacuum pump 101, and the vacuum pump 101 is respectively connected to the stirring and filtering barrel assembly 2, the vacuum defoaming barrel assembly 3 and the vacuum infusion barrel assembly 4;

[0047] The stirring and filtering barrel assembly 2 includes a stirrer, which includes a movably connected pressure fan 201 and a stirring fan 202. During stirring, the pressure fan 201 and the stirring fan 202 overlap; during drainage, the pressure fan 201 is perpendicular to the stirring fan 202 and parallel to the horizontal plane;

[0048] The vacuum defoaming barrel assembly 3 includes a liquid spraying device, which includes a boosting plate 301, a boosting spring 302, a boosting column 303, a second valve 304 and a guide tube 305 connected in sequence, and the liquid spraying device is used to make the sprayed liquid present a laminar state.

[0049] Among them, the "stirring and filtering barrel assembly" is used to stir and filter the raw materials of the dummy skin slurry and achieve one-time defoaming. The "vacuum defoaming barrel assembly" is used to vacuum defoam the slurry. The "vacuum infusion barrel assembly" is used to vacuum infuse the slurry into the dummy skin mold. The "central control system" is used to control the working status of each component during the entire infusion process, such as the timing of starting the vacuum pump and the stirring rate of the stirring fan.

[0050] When the vacuum defoaming assembly is working, the booster column increases the hydraulic pressure during liquid spraying by transmitting hydraulic pressure to the booster spring. After the liquid spraying is completed, the liquid needs to be refilled, and the booster spring pulls it back again to achieve the functions of boosting and depressurizing. The head of the booster column fits the shape of the liquid injection port and is in a normally closed state. When powered on, the booster spring slightly pulls it back a certain distance to provide a liquid spray opening to spray liquid.

[0051] In order to effectively remove the air in the liquid (defoaming), this embodiment uses a liquid spray device with a specific structure to defoam the liquid in a laminar state. In a laminar state, the shear force of the liquid is usually small. The laminar state refers to the flow of liquid in which the fluid particles flow in parallel and orderly layers without obvious eddy or turbulent phenomena. In this state, the friction resistance inside the fluid is small, so the shear force of the liquid is relatively small. In contrast, the shear force of the liquid in a turbulent state is much greater, because turbulence can cause complex eddy structures and high-intensity shear forces to form inside the fluid. Therefore, based on this theory, it can be seen that keeping the liquid in a laminar state while extracting the air therein can allow the air to be more fully extracted from the liquid. The guide tube is used to guide the liquid injection angle (the angle between the horizontal plane). The larger the injection angle, the more curved the liquid curve formed, and the higher the efficiency of vacuuming, but it should not be too large to prevent the liquid from being sprayed outside.

[0052] Optionally, in order to fully utilize the gravity drainage effect, the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly, and the vacuum infusion barrel assembly are arranged in sequence from high to low.

[0053] In an optional embodiment, the stirring and filtering barrel assembly 2 further includes a speed change device 203, a lifting device 204, a pressure fan bearing 205, an inner barrel 206, an outer barrel 207, at least two first valves 208, a filter assembly 209 and a first liquid storage barrel 2010, and the speed change device 203, the lifting device 204, the pressure fan bearing 205 and the pressure fan 201 are connected in sequence;

[0054] The liquid spraying device is disposed in the inner barrel 206, and the inner barrel 206 is disposed in the outer barrel 207;

[0055] At least two first valves 208 are disposed on the outer barrel 207 , the filter assembly 209 is disposed below the at least two first valves 208 , and the first liquid storage barrel 2010 is disposed below the filter assembly 209 .

[0056] The first valve can be set to 2, 3, 4 or 5. The first valve is mainly used to control the flow rate of the filtered liquid to prevent the filter hole from being blocked due to excessive flow rate and to prevent the processing efficiency from being affected by too slow flow rate. The outer barrel is used to bear the friction and pressure of the inner barrel during stirring and to control the opening of the first valve. Considering the spatial position and the size of the space, the outer barrel is generally difficult to clean, so the inner barrel is designed to clean and replace another group of liquids to improve the processing efficiency. Therefore, the outer barrel can be made of friction-resistant materials, and the inner barrel is made of materials with a certain anti-liquid viscosity to prevent the liquid from splashing during the stirring process and sticking to the inner barrel to cause material waste. The speed change device is used to control the stirring speed of the stirring fan. The lifting device is used to control the lifting and lowering of the stirrer. For example, when the inner barrel needs to be replaced or the stirrer needs to be cleaned, the stirrer needs to be raised. The pressure fan bearing can be used to adjust the setting angle of the pressure fan. When stirring, the pressure fan overlaps with the stirring fan to avoid the pressure fan affecting the stirring effect. When discharging, the pressure fan is perpendicular to the stirring fan to pressurize the liquid and increase the discharge flow rate.

[0057] Optionally, a damping clamp is provided on the outside of the outer barrel, which is used to support the outer barrel to prevent the barrel body from shaking violently due to excessively high stirring speed, and is made of damping material.

[0058] Optionally, the filter assembly 209 includes a filter screen 2091 and a filter funnel 2092, wherein the filter screen 2091 is disposed below at least two first valves 208, and the filter funnel 2092 is disposed below the filter screen 2091. The two-layer filtration can effectively prevent the solids that are not completely dissolved in the raw materials from entering the subsequent process and affecting the product performance.

[0059] In an optional embodiment, the stirring and filtering barrel assembly 2 further includes a first tilting platform 2011, and the first liquid storage barrel 2010 is disposed on the first tilting platform 2011. The first tilting platform 2011 is used to provide an inclined surface for the first liquid storage barrel 2010, so that the first liquid storage barrel 2010 is tilted. This embodiment adopts a gravity drainage method, and the first liquid storage barrel is tilted by the support of the first tilting platform, so that the liquid flowing into the first liquid storage barrel can flow into the vacuum defoaming barrel assembly under the action of gravity.

[0060] Optionally, the first liquid storage barrel is in a vacuum state.

[0061] Optionally, the inclination angle of the first inclination platform (the angle between the first inclination platform and the horizontal plane) is 45°.

[0062] In an optional embodiment, the vacuum defoaming barrel assembly 3 further includes a first infuser 306, an anti-sticking wall 307, a second liquid storage barrel 308 and a second tilting platform 309, and the first infuser 306 is connected to the booster plate 301; the first infuser 306 is used to be connected to the liquid outlet of the stirring and filtering barrel assembly 2;

[0063] The anti-sticking wall 307 is disposed on the opposite side of the guide tube 305 to prevent liquid splashing and to guide the liquid into the second liquid storage barrel 308;

[0064] The second liquid storage barrel 308 is placed on the second inclined platform 309. The second inclined platform 309 is used to provide an inclined surface for the second liquid storage barrel 308 so that the second liquid storage barrel 308 is placed inclined.

[0065] Optionally, the anti-sticking wall is made of anti-sticking material.

[0066] Optionally, the liquid spraying device further comprises a pull wire 3010, by controlling the pull wire the inclination angle of the guide tube can be controlled so as to adapt to skin layer slurry of different compositions.

[0067] In an optional embodiment, the vacuum infusion barrel assembly 4 includes a second infusion device 401, a pressure gauge 402, an injection pipe 403, a third valve 404, a pressure-sensitive sensor 405, a third infusion device 406, a feedback control device 407, a dummy skin mold bearing space 408, a clamping ring 409 and a vibrator 4010; the second infusion device 401 is used to be connected to the liquid outlet of the vacuum defoaming barrel assembly 3;

[0068] The second injection device 401, the pressure gauge 402, the injection tube 403 and the third valve 404 are connected in sequence;

[0069] The third valve 404 and the pressure-sensitive sensor 405 are both used to be connected to the dummy skin mold, and the dummy skin mold bearing space 408 is used to place the dummy skin mold; the pressure-sensitive sensor 405, the feedback control device 407 and the third infuser 406 are connected in sequence, and the third infuser 406 is also connected to the second infuser 401;

[0070] The clamping ring 409 is arranged on the outside of the dummy skin mold bearing space 408 to clamp the dummy skin mold; the vibrator 4010 is arranged above the dummy skin mold bearing space 408 to provide vibration force for the dummy skin mold.

[0071] The pressure sensor has high sensitivity. When there is enough liquid in the dummy skin mold, the pressure sensor will get a corresponding signal, and then transmit the signal to the feedback control device. The feedback control device can control the third injector to stop working, and the second injector connected to the third injector will stop working immediately, and no more liquid will be injected, and the third valve will also be closed. The pressure gauge is used to reflect the injection pressure of the second injector, so as to guide the adjustment of the injection speed. The clamp ring is used to clamp the dummy skin mold, so that the automobile collision dummy skin manufacturing device can be suitable for clamping different types of dummy skin molds. The vibrator is used to shake the liquid evenly after the liquid is injected.

[0072] It should be noted that, in this embodiment, the first injector, the second injector and the third injector all use internal pistons to push the liquid to flow, so that the liquid flows into the rear-end device.

[0073] In an optional embodiment, the stirring and filtering barrel assembly 2, the vacuum defoaming barrel assembly 3 and the vacuum infusion barrel assembly 4 further include a thermostat 6, which is connected to the central control system 5. The thermostat is used to keep the temperature inside the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly at a desired temperature, which is beneficial to the flow and precise infusion of the liquid.

[0074] In an optional embodiment, the external vacuum box assembly 1 includes a vacuum pump carrier 102, and the vacuum pump carrier 102 is provided with a sound insulation layer (not shown) and an exhaust port (not shown). The vacuum pump carrier is used to carry the vacuum pump, so that the vacuum pump is isolated from the other three assemblies to prevent air from entering the vacuum barrel and affecting it. The sound insulation layer on the device is used to isolate the noise of the vacuum pump during operation, and the exhaust port is used to exhaust excess gas, and an exhaust fan can be installed on the exhaust port. Optionally, if the ambient temperature is too high during use, a condenser or other device can be installed to cool the vacuum pump, but it should be noted that the sound insulation layer should not be damaged when designing the condenser channel.

[0075] The above-mentioned automobile collision dummy skin manufacturing device includes an external vacuum box assembly, a stirring and filtering barrel assembly, a vacuum defoaming barrel assembly, a vacuum infusion barrel assembly and a central control system. The external vacuum box assembly can provide a vacuum environment for the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly, the vacuum infusion barrel assembly and the central control system. The central control system can control the stirring and filtering, vacuum defoaming and vacuum infusion processes of the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly. The stirring and filtering barrel assembly contains an agitator with a specific structure. When stirring is required, the pressure fan and the stirring fan overlap, and when drainage is required, the pressure fan is vertical. The vacuum defoaming barrel assembly includes a liquid spraying device with a specific structure, and its boosting plate can be used to control the opening and hydraulic pressure of the second valve. When the boosting plate is working, the boosting column increases the hydraulic pressure by delivering hydraulic pressure to the boosting spring. After the liquid spraying is completed, the liquid needs to be refilled, and the boosting spring pulls it back to achieve the functions of boosting and pressure relief. The guide pipe is used to guide the liquid spraying angle. The entire liquid spraying device can make the sprayed liquid present a laminar state. The laminar state can make the gas more fully separated from the liquid and improve the defoaming effect. The above device integrates the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly with a specific structure. When in use, the raw materials of the prepared dummy skin slurry can be added to the stirring and filtering barrel assembly. It can not only quickly complete the skin manufacturing and improve the production efficiency, but also make the defoaming more thorough and improve the product qualification rate. The whole process can be automatically controlled, reducing labor consumption and improving product consistency.

[0076] Example 2

[0077] like Figure 5 As shown, this embodiment provides a method for manufacturing the skin of a car collision dummy, using the car collision dummy skin manufacturing device described in Example 1 to perform skin layer slurry perfusion, including the following steps:

[0078] S110. Determine the control parameters of the central control system according to the skin layer ingredient ratio; the control parameters of the central control system include the stirring speed of the stirring fan, the opening of the second valve, the filling speed of the first injector and the filling speed of the second injector.

[0079] S120. After the raw materials of the skin layer slurry are added into the stirring and filtering barrel assembly, the central control system controls the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum perfusion barrel assembly to operate according to the control parameters of the central control system until the perfusion of the skin layer slurry is completed.

[0080] The above-mentioned automobile collision dummy skin manufacturing method first determines the control parameters of the central control system based on the skin layer ingredient ratio, and then after the raw materials of the skin layer slurry are added to the stirring and filtering barrel assembly, the central control system controls the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum perfusion barrel assembly to work according to the control parameters of the central control system until the perfusion of the skin layer slurry is completed, thereby realizing automatic perfusion for different skin layer slurries, with high perfusion efficiency, good defoaming effect, high product quality and high product consistency.

[0081] In an optional embodiment, the determining the control parameters of the central control system according to the skin layer ingredient ratio includes: determining the control parameters of the central control system according to the skin layer ingredient ratio and a preset control parameter database, wherein the preset control parameter database includes a mapping relationship between the skin layer ingredient ratio and the central control system control parameters. This embodiment determines the control parameters of the central control system based on the skin layer ingredient ratio and the preset control parameter database, which is simple and fast, wherein the preset control parameter database can be set in the central control system in advance and can be directly called when used.

[0082] In an optional implementation, the preset control parameter database is constructed in the following manner:

[0083] Determining a first mapping relationship between the raw materials, temperature, stirring speed and stirring time of the skin layer slurry according to the mixing degree of the raw materials of different skin layer slurries at different temperatures, different stirring speeds and different stirring times;

[0084] Determine a second mapping relationship between the skin layer ratio, the temperature, the opening of the second valve and the perfusion speed of the first perfusion device according to the dynamic viscosity of the slurry corresponding to the different skin layer ratios at different temperatures, the opening of the second valve, the perfusion speed of the first perfusion device and the Reynolds number threshold;

[0085] Determine a third mapping relationship between the skin layer ingredient ratio, temperature, perfusion time, perfusion volume, and perfusion speed of the second perfusion device according to the perfusion time of the slurry corresponding to the different skin layer ingredient ratios at different temperatures, the perfusion volume of the different skin layer ingredient ratios, and the perfusion speed of the second perfusion device;

[0086] A preset control parameter database is determined according to the first mapping relationship, the second mapping relationship, and the third mapping relationship.

[0087] The control parameters of the central control system are crucial to the reliability of the entire skin perfusion. The stirring speed of the stirring fan affects the stirring time and the full dissolution of the raw materials. The opening of the second valve and the perfusion speed of the first perfusion device affect the flow state of the liquid (laminar or turbulent, etc., which can be determined by the Reynolds number. When the Reynolds number is lower than 2000, it is a laminar state. Therefore, the Reynolds number threshold is set to 2000 in this embodiment). The perfusion speed of the second perfusion device affects the perfusion time. This embodiment obtains a preset control parameter database by determining three mapping relationships respectively. As long as the temperature and skin layer ingredient ratio are known, combined with parameters such as perfusion volume, the required parameters can be obtained. It can be understood that in the above mapping relationship, when certain parameters are determined, it is the optimal solution to cooperate with other parameters. For example, when the raw materials and temperature of the skin layer slurry are determined, the stirring speed and stirring time of the stirring fan obtained according to the first mapping relationship must be the best, so as to ensure the maximum mixing of the raw materials. For another example, when the skin layer ingredient ratio and temperature are determined, the opening of the second valve and the infusion speed of the first infusion device obtained according to the second mapping relationship must be the best, so as to ensure that the liquid is in a laminar state.

[0088] The following is a specific example to illustrate the process of using the device and method of the present application to perform skin slurry perfusion. This example takes the slurry of the head skin layer as an example. The dynamic viscosity of the slurry at 29°C is 800 mPa·s and the density is 1.0 g / cm 3 , the flow rate through the filter assembly is 0.2L / s, and the stirring speed of the stirring fan is 1000 r / min. After flowing into the vacuum defoaming assembly, the hydraulic pressure is 200 kPa, the second valve opening is 30%, and the laminar flow state with a Rayleigh number of 1900 can be achieved. The inclination angles of the first and second tilting tables are both 45°. After entering the vacuum perfusion assembly, the hydraulic pressure is 100 kPa, the perfusion speed is 0.03 L / s, and the sensitivity of the pressure sensor is 82.3 mv / pa.

[0089] 1. Stirring - filtering - defoaming once

[0090] 1) Put the solid-liquid mixture prepared in proportion into the inner barrel, set the stirring time to 15 minutes, the temperature to 29°C, and the stirring speed to 1000r / min through the central control system, let the liquid stand for 2 minutes after stirring, and then open the first valve below.

[0091] 2) Lift the agitator above the liquid surface through the lifting device, adjust the angle of the pressure fan to align with the hole of the stirring fan, open the first valve switch below and set the first valve opening to 30%, start to pressurize the liquid to filter through the filter screen and filter funnel and flow into the first liquid storage tank to store the liquid.

[0092] 3) After the filtration is completed, open the No. 1 vacuum pump for initial defoaming for 5 minutes at a pumping rate of 100L / s.

[0093] 4) Set the inclination angle of the first tilting table to 45°, and allow the liquid to flow into the vacuum defoaming assembly through the pipeline under the action of gravity.

[0094] 2. Secondary defoaming (main defoaming)

[0095] 1) After the liquid fills the pipes of the first injector and the spray device, the second valve is closed, and the piston pressure of the first injector is controlled by the pressure gauge and the feedback control device, so that the hydraulic pressure is controlled to 200 kPa and the temperature is 29℃. The density of the liquid at this temperature is 1.0 g / cm 3 The pouring speed is 0.07 m 3 / s, the cross-sectional area of ​​the pipe is 0.04 cm 3 , then calculate the liquid flow rate through formula 1, and calculate the second valve opening through formula 2.

[0096] (Formula 1), where Q is the flow rate of the liquid, A is the cross-sectional area of ​​the pipe, and v is the liquid flow velocity.

[0097] (Formula 2), where D is the second valve opening, ρ is the liquid density, μ is the dynamic viscosity of the liquid, and Re is the Reynolds number. Re is taken as 1900 during calculation.

[0098] 2) Turn on the vacuum pump at a suction rate of 100L / s and start the defoaming process. After all the liquid has been sprayed, that is, after the piston of the first injector has reached the bottom, the central control system controls the closing of the second valve. If the defoaming is not completed in one time, continue to introduce liquid from the first liquid storage barrel for defoaming again.

[0099] 3) After defoaming, the liquid flows from the anti-sticking wall into the second liquid storage barrel below. The inclination angle of the second tilting table is set to 45°, and then it is guided into the vacuum infusion assembly under the action of gravity.

[0100] 3. Infusion

[0101] 1) The liquid flows into the second injector through the outlet pipe of the second liquid storage barrel and is stored. At this time, the third valve is closed.

[0102] 2) Set the propulsion speed of the second injector to 0.03 L / s through the central control system and open the third valve.

[0103] 3) After the liquid is fully filled, it contacts the pressure-sensitive sensor, which feeds back a signal to the feedback control device. The feedback control device controls the closing of the third valve. After the filling is completed, the central control system pops up a prompt, and the mold can be taken out of the device for solidification.

[0104] 4) After the device is finished running, the staff will clean it with alcohol.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application.

Claims

1. A vehicle collision dummy skin manufacturing device, characterized in that: It includes an external vacuum box assembly, and a stirring and filtering barrel assembly, a vacuum defoaming barrel assembly, a vacuum infusion barrel assembly and a central control system arranged in the external vacuum box assembly; the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly are connected in sequence and are all connected to the central control system; the external vacuum box assembly includes a vacuum pump, and the vacuum pump is respectively connected to the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly; The stirring and filtering barrel assembly includes a stirrer, and the stirrer includes a pressure fan and a stirring fan that are movably connected. During stirring, the pressure fan and the stirring fan overlap; during drainage, the pressure fan is perpendicular to the stirring fan and parallel to the horizontal plane; The vacuum defoaming barrel assembly includes a liquid spraying device, which includes a pressure-boosting plate, a pressure-boosting spring, a pressure-boosting column, a second valve and a flow guide pipe connected in sequence, and the liquid spraying device is used to make the sprayed liquid present a laminar flow state; The stirring and filtering barrel assembly further comprises a speed change device, a lifting device, a pressure fan bearing, an inner barrel, an outer barrel, at least two first valves, a filtering assembly and a first liquid storage barrel, wherein the speed change device, the lifting device, the pressure fan bearing and the pressure fan are connected in sequence; The liquid spraying device is arranged in the inner barrel, and the inner barrel is arranged in the outer barrel; At least two of the first valves are arranged on the outer barrel, the filter assembly is arranged below at least two of the first valves, and the first liquid storage barrel is arranged below the filter assembly.

2. The automobile collision dummy skin manufacturing device according to claim 1, characterized in that: The stirring and filtering barrel assembly also includes a first tilting platform, and the first liquid storage barrel is arranged on the first tilting platform. The first tilting platform is used to provide an inclined surface for the first liquid storage barrel so that the first liquid storage barrel is placed at an angle.

3. The automobile collision dummy skin manufacturing device according to claim 1, characterized in that: The vacuum defoaming barrel assembly further includes a first infuser, an anti-sticking wall, a second liquid storage barrel and a second tilting platform, wherein the first infuser is connected to the pressurizing plate; the first infuser is used to be connected to the liquid outlet of the stirring and filtering barrel assembly; The anti-sticking wall is arranged on the opposite side of the guide pipe, and is used to prevent liquid splashing and guide the liquid into the second liquid storage barrel; The second liquid storage barrel is placed on the second inclined platform, and the second inclined platform is used to provide an inclined surface for the second liquid storage barrel so that the second liquid storage barrel is placed inclined.

4. The automobile collision dummy skin manufacturing device according to claim 1, characterized in that: The vacuum infusion barrel assembly includes a second infusion device, a pressure gauge, an injection pipe, a third valve, a pressure-sensitive sensor, a third infusion device, a feedback control device, a dummy skin mold bearing space, a restraining ring and a vibrator; the second infusion device is used to be connected to the liquid outlet of the vacuum defoaming barrel assembly; The second injector, the pressure gauge, the injection pipe and the third valve are connected in sequence; The third valve and the pressure-sensitive sensor are both used to be connected to the dummy skin mold, and the dummy skin mold bearing space is used to place the dummy skin mold; the pressure-sensitive sensor, the feedback control device and the third injector are connected in sequence, and the third injector is also connected to the second injector; The clamping ring is arranged on the outside of the bearing space of the dummy skin mold, and is used to clamp the dummy skin mold; the vibrator is arranged above the bearing space of the dummy skin mold, and is used to provide vibration force for the dummy skin mold.

5. The automobile collision dummy skin manufacturing device according to claim 1, characterized in that: The stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum infusion barrel assembly also include a constant temperature controller, and the constant temperature controller is connected to the central control system.

6. The automobile collision dummy skin manufacturing device according to any one of claims 1 to 5, characterized in that: The external vacuum box assembly comprises a vacuum pump carrying device, and the vacuum pump carrying device is provided with a sound insulation layer and an exhaust port.

7. A method for manufacturing automobile collision dummy skin, characterized in that: The skin layer slurry perfusion is performed using the automobile collision dummy skin manufacturing device according to any one of claims 1 to 6, comprising the following steps: Determine the control parameters of the central control system according to the skin layer ingredient ratio; the control parameters of the central control system include the stirring speed of the stirring fan, the opening of the second valve, the filling speed of the first filling device and the filling speed of the second filling device; After the raw materials of the skin layer slurry are added into the stirring and filtering barrel assembly, the central control system controls the stirring and filtering barrel assembly, the vacuum defoaming barrel assembly and the vacuum perfusion barrel assembly to operate according to the control parameters of the central control system until the perfusion of the skin layer slurry is completed.

8. The method for manufacturing the automobile collision dummy skin according to claim 7, characterized in that: Determining the control parameters of the central control system according to the skin layer ingredient ratio includes: The control parameters of the central control system are determined according to the skin layer ingredient ratio and a preset control parameter database, wherein the preset control parameter database includes a mapping relationship between the skin layer ingredient ratio and the central control system control parameters.

9. The method for manufacturing the automobile collision dummy skin according to claim 8, characterized in that: The preset control parameter database is constructed in the following manner: Determining a first mapping relationship between the raw materials, temperature, stirring speed and stirring time of the skin layer slurry according to the mixing degree of the raw materials of different skin layer slurries at different temperatures, different stirring speeds and different stirring times; Determine a second mapping relationship between the skin layer ratio, the temperature, the opening of the second valve and the perfusion speed of the first perfusion device according to the dynamic viscosity of the slurry corresponding to the different skin layer ratios at different temperatures, the opening of the second valve, the perfusion speed of the first perfusion device and the Reynolds number threshold; Determine a third mapping relationship between the skin layer ingredient ratio, temperature, perfusion time, perfusion volume, and perfusion speed of the second perfusion device according to the perfusion time of the slurry corresponding to the different skin layer ingredient ratios at different temperatures, the perfusion volume of the different skin layer ingredient ratios, and the perfusion speed of the second perfusion device; A preset control parameter database is determined according to the first mapping relationship, the second mapping relationship, and the third mapping relationship.

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