Environment-friendly vacuum spraying device for nano-coating screw

Abstract

The utility model belongs to the technical field of vacuum plating, and discloses an environment-friendly vacuum spraying device for a nano-coating screw, which comprises a vacuum box, an airtight door hinged to open and close is arranged on the vacuum box, a negative pressure vacuum machine is arranged on one side of the vacuum box, and an input end of the negative pressure vacuum machine is hermetically connected with an inner cavity of the vacuum box. A pressure release valve pipe is arranged above the negative pressure vacuum machine, an inner cavity of the vacuum box is communicated with the atmosphere through the pressure release valve pipe, a spraying mechanism, a refrigerator, a heat conduction mechanism and a screw clamp are arranged in the inner cavity of the vacuum box, a plurality of sets of screws are fixed to the screw clamp, and an inert gas supplementing pipe is arranged on the side, away from the negative pressure vacuum machine, of the vacuum box. According to the utility model, the structural design is compact and reasonable, a vacuum environment can be created, coating materials can be heated to form gaseous particles, the gaseous particles are attached to the surface of the screw rod to be condensed into a nano-scale film, the nano-coating film is coated by a vapor deposition method, the coating thickness is uniform and controllable, and the spraying quality is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum plating technology field, concretely is a kind of environmental protection vacuum spraying device of nanometer coating screw rod. BACKGROUND

[0002] Under the continuous innovation of material science and surface treatment technology, nanometer coating vacuum spraying technology emerges as the times require, and it is born with deep technical development background and actual application demand.

[0003] Nanometer coating, as the frontier achievement in material field, refers to the thin film of thickness in nanometer scale (usually 1 to 1000 nanometers) on material surface by specific technical means. The coating exhibits many excellent properties due to its unique microstructure. From the aspect of mechanical properties, nanometer coating can significantly improve the hardness and wear resistance of material surface, for example, after nanometer coating is coated on the surface of machining tool, the service life of tool is greatly prolonged, and the cost loss and production stagnation caused by frequent replacement of tool can be effectively reduced. In terms of chemical properties, nanometer coating has good corrosion resistance, and can form a dense protective barrier on the surface of metal material to resist the corrosion of external corrosive medium. For metal parts in the fields of aviation, aerospace and marine engineering, this property greatly enhances the reliability and durability of parts in harsh environments.

[0004] In terms of optical properties, nanometer coating can realize precise control of light, such as coating nanometer antireflection film on the surface of optical lens, which can effectively reduce the reflectivity of lens to light and improve the light transmittance, to bring users clearer visual experience. In the field of electronics, nanometer coating can improve the electrical properties of materials, such as in integrated circuits, nanometer insulating coating can effectively prevent short circuit between electronic components, and improve the running stability and performance of electronic equipment.

[0005] Nanometer coating is widely used. In the automobile industry, nanometer coating is used on the surface of automobile engine parts, which can reduce the friction coefficient and improve the fuel efficiency and power output of engine; in the field of building, nanometer self-cleaning coating is coated on the surface of glass, which can make the glass have super-hydrophilic property, and rainwater can wash away the dust on the surface, reducing the cost and frequency of manual cleaning. In the medical industry, nanometer antibacterial coating is applied to the surface of medical devices, which can effectively inhibit the growth of bacteria, reduce the risk of postoperative infection, and protect the health and safety of patients.

[0006] To achieve high-quality coating of nanometer coating, vacuum spraying technology becomes an important means. The traditional vacuum spraying technology aims to reduce the interference of air molecules on the coating process by creating a vacuum environment, so that the coating material can be more accurately and uniformly deposited on the surface of the substrate material. However, there is a key problem in the existing vacuum spraying technology - incomplete vacuum extraction. In actual operation, due to the limitations of vacuum equipment performance, vacuum chamber structure design, and pumping time, it is difficult to completely extract the air in the vacuum chamber.

[0007] When there is residual air in the vacuum chamber, active gases such as oxygen and water vapor in it can have a serious impact on the spraying quality. Taking metal coating as an example, if oxygen is left during the coating process, the metal atoms at high temperature are prone to chemical reaction with oxygen to form metal oxide impurities. These impurities will be embedded in the nanometer coating, reducing the purity of the coating and affecting the performance of the coating, such as reducing the conductivity and corrosion resistance of the coating.

[0008] In addition, the presence of residual active gases will also interfere with the motion trajectory and deposition process of the coating material molecules. Under normal circumstances, in an ideal vacuum environment, coating material molecules should move in a straight line and uniformly deposit on the substrate surface. However, the presence of active gas molecules will cause scattering of coating material molecules, resulting in uneven deposition and affecting the protective effect and appearance quality of the coating. For example, in the preparation of nanometer coating for optical lenses, uneven coating thickness will cause inconsistent optical performance of the lenses, resulting in problems such as light spots and color differences, which will seriously affect the imaging quality of the lenses.

[0009] In summary, nanometer coating has great application potential and value in various fields, and the existing vacuum spraying technology has the key bottleneck of incomplete vacuum extraction in realizing high-quality nanometer coating preparation. Therefore, a more advanced and efficient nanometer coating vacuum spraying technology is needed to break through this dilemma and meet the growing demand for material surface treatment. Practical new type content

[0010] (1) Technical problem solved

[0011] In view of the shortcomings of the prior art, the present application provides an environmentally friendly vacuum spraying device for nanometer coating screw rod, which solves the problem of the influence of active gas on the spraying quality during vacuum spraying in the background technology.

[0012] (2) Technical scheme

[0013] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an environmental protection vacuum spraying device of nanometer coating screw rod, including vacuum box, the closed door of hinged opening and closing is provided on vacuum box, one side of vacuum box is provided with negative pressure vacuum machine, and the input end of negative pressure vacuum machine is sealedly connected with the inner chamber of vacuum box, and the upper portion of negative pressure vacuum machine is provided with pressure relief valve pipe, and the pressure relief valve pipe is arranged in the side wall of vacuum box and is communicated with the inner chamber of vacuum box and atmosphere, and the inner chamber of vacuum box is provided with spraying mechanism, refrigerator, heat conduction mechanism and screw rod clamp, and a plurality of groups of screw rods are fixed on screw rod clamp, and the side, away from negative pressure vacuum machine of vacuum box, is provided with inert gas supplement pipe, and the inert gas supplement pipe is connected with inert gas tank.

[0014] Preferably, the spraying mechanism comprises a coating material spray gun and an electron gun, the coating material spray gun is arranged at the lower center of the vacuum box, the other end of the coating material spray gun is connected with the material conveying mechanism, and the electron gun is also arranged at the lower center of the vacuum box, and the coating material spray gun and the electron gun are perpendicular to each other.

[0015] Preferably, the refrigerator is fixedly installed at the top of the vacuum box, and the working surface of the refrigerator is vertically downward, the heat conduction mechanism comprises a heat conduction plate and two groups of heat plate support strips, the two groups of heat plate support strips are arranged at the lower side of the refrigerator in the vacuum box, the heat conduction plate is arranged between the two groups of heat plate support strips and the refrigerator, the top of the heat conduction plate abuts against the working surface of the refrigerator, and the bottom of the heat conduction plate abuts against the two groups of heat plate support strips.

[0016] Preferably, a plurality of fixing holes are formed in the screw rod clamp, and an internal thread corresponding to the screw rod is formed in each fixing hole, a clamping groove corresponding to the screw rod clamp is formed in the heat conduction plate, and the screw rod clamp is slidingly clamped in the clamping groove.

[0017] Preferably, the input end of the negative pressure vacuum machine is provided with a purifier, and a filter element with a filter membrane is arranged in the purifier.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the environmental protection vacuum spraying device of nanometer coating screw rod has the following beneficial effects:

[0020] 1. The environmental protection vacuum spraying device of nanometer coating screw rod is provided with a negative pressure vacuum machine, a refrigerator, a vacuum box and a spraying mechanism, etc., can create a vacuum environment, and heat the coating material, so that the gaseous particles of the coating material are attached to the surface of the screw rod and condensed into a nanometer film, the nanometer coating film is plated by the gas phase deposition method, the coating thickness is uniform and controllable, and the spraying quality is good.

[0021] 2. The inert gas supplement pipe is arranged, and through the trace inert gas into the vacuum cavity, the incomplete vacuumization in the vacuum cavity can be prevented, the active gas in the air can be prevented from affecting the nano coating spraying operation, the coating thickness is uniform, and the nano coating spraying quality can be obviously improved.

[0022] 3. The replaceable screw clamp is arranged, through replacing the screw clamp with different aperture size fixing holes, the device can be suitable for various screw rods, and the applicability is wide. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic view of the utility model;

[0024] Figure 2 It is the overall structure schematic view of the utility model;

[0025] Figure 3 It is the heat conduction mechanism schematic view of the utility model;

[0026] Figure 4 It is the heat conduction plate and screw clamp schematic view of the utility model.

[0027] In the drawing: 1, vacuum box;2, airtight door;3, negative pressure vacuum machine;4, pressure relief valve pipe;5, spraying mechanism;6, refrigerator;7, heat conduction mechanism;8, screw clamp;9, inert gas supplement pipe;10, coating material spray gun;11, electron gun;12, heat conduction plate;13, heat plate support strip;14, clamping groove;15, fixed hole;16, purifier. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0029] Please refer to Figures 1-4 The utility model provides a kind of technical scheme:

[0030] The utility model provides a kind of nanometer coating screw environmental protection vacuum spraying device, including vacuum box 1, vacuum box 1 is provided with hinged closing and opening airtight door 2, vacuum box 1 one side is provided with negative pressure vacuum machine 3, the input end of negative pressure vacuum machine 3 is connected with vacuum box 1 inner chamber seal, the upper portion of negative pressure vacuum machine 3 is provided with pressure relief valve pipe 4, pressure relief valve pipe 4 is arranged in the side wall of vacuum box 1, and is connected with the inner chamber of vacuum box 1 and atmosphere, the inner chamber of vacuum box 1 is provided with spraying mechanism 5, refrigerator 6, heat conduction mechanism 7 and screw clamp 8, and a plurality of groups of screws are fixed on screw clamp 8, the side of vacuum box 1 away from negative pressure vacuum machine 3 is provided with inert gas supplement pipe 9, and inert gas supplement pipe 9 is connected with inert gas gas tank.The device is carried out vapor deposition by gas phase deposition method, vacuum box 1 is driven by negative pressure vacuum machine 3 to carry out vacuumizing, it is convenient for plating material to be evenly laid in space, can make plating thickness more uniform, and control plating time and the quantity of plating material passed in can control plating thickness.

[0031] Further, spraying mechanism 5 includes plating material spray gun 10 and electron gun 11, plating material spray gun 10 is arranged in the lower center of vacuum box 1, the other end of plating material spray gun 10 is connected with material conveying mechanism, and electron gun 11 is also arranged in the lower center of vacuum box 1, and plating material spray gun 10 and electron gun 11 are perpendicular to each other.Plating material spray gun 10 sprays plating material, and electron gun 11 includes electron emission electrode, acceleration electric field, deflection coil and other structures.Electron gun 11 can emit high-energy electron beam, and the high-energy electron beam hits plating material to make it obtain sufficient energy to evaporate and convert into gaseous particles.According to the principle of thermodynamics, gaseous particles will make irregular thermal motion in vacuum box 1 and be uniformly distributed therein.This method makes the plating thickness uniform.

[0032] Further, refrigerator 6 is fixedly installed on the top of vacuum box 1, and the working surface of refrigerator 6 is vertically downward, heat conduction mechanism 7 includes heat conduction plate 12 and two groups of heat plate support strips 13, two groups of heat plate support strips 13 are arranged on the lower side of refrigerator 6 in vacuum box 1, heat conduction plate 12 is arranged between the two groups of heat plate support strips 13 and refrigerator 6, the top of heat conduction plate 12 abuts against the working surface of refrigerator 6, and the bottom of heat conduction plate 12 abuts against the two groups of heat plate support strips 13.Refrigerator 6 is used to provide cold source, and thermoelectric effect is recommended for refrigeration.Refrigerator 6 must be arranged above, and the inner chamber of vacuum box 1 is a vacuum environment, but the suspended particles therein are inevitably affected by the gravity of the earth, so refrigerator 6 must be arranged above to realize temperature gradient.According to the principle of heat diffusion, gaseous plating particles will tend to diffuse from high-temperature zone to low-temperature zone.Refrigerator 6 not only drives gaseous particles to condense as a cold source, but also provides temperature difference to offset the influence of gravity.

[0033] Further, a plurality of groups of fixing holes 15 are formed on the screw clamp 8, and inner threads corresponding to the screws are formed in the fixing holes 15. A clamping groove 14 corresponding to the screw clamp 8 is formed on the heat conduction plate 12, and the screw clamp 8 is slidingly clamped in the clamping groove 14. The screw clamp 8 is provided with a plurality of groups, and the hole diameters of the fixing holes 15 in each group are different. This design makes the device widely applicable to screws of different sizes.

[0034] Further, a purifier 16 is arranged on the input of the negative pressure vacuum machine 3, and a filter element with a filter membrane is arranged in the purifier 16. The purifier 16 is used to filter the coating material in the vacuum box 1, and can prevent the coating material in the air extracted by the negative pressure vacuum machine 3 from blocking. The filter element in the purifier 16 should be replaced regularly.

[0035] Structure description:

[0036] The vacuum box 1 provides a closed space for vacuum spraying operation, and has a box shape. The vacuum box 1 is connected to the negative pressure vacuum machine 3, the pressure relief valve pipe 4, and the inert gas supplement pipe 9. The vacuum box 1 is internally provided with a spraying mechanism 5, a refrigerating device 6, a heat conduction mechanism 7, and a screw clamp 8.

[0037] The sealing door 2 is used to open and close the vacuum box 1, and ensures the vacuum environment in the vacuum box 1. The sealing door 2 is hingedly connected to the vacuum box 1.

[0038] The negative pressure vacuum machine 3 extracts the air in the vacuum box 1 to form a vacuum environment. The negative pressure vacuum machine 3 has a device body shape, and the input end is sealingly connected to the inner chamber of the vacuum box 1.

[0039] The pressure relief valve pipe 4 connects the inner chamber of the vacuum box 1 to the atmosphere, and is used to balance the air pressure inside and outside the vacuum box 1. The pressure relief valve pipe 4 has a pipe shape, and is arranged on the side wall of the vacuum box 1. One end of the pressure relief valve pipe 4 is connected to the vacuum box 1, and the other end is connected to the atmosphere.

[0040] The spraying mechanism 5 includes a coating material spraying gun 10 and an electron gun 11, and is used to spray and evaporate the coating material. The spraying mechanism 5 is located at the lower center in the vacuum box 1. The coating material spraying gun 10 is connected to the material conveying mechanism, and is perpendicular to the electron gun 11.

[0041] The refrigerating device 6 provides a cold source, drives the gaseous particles to condense, and offsets the effect of gravity. The refrigerating device 6 is installed at the top of the vacuum box 1, and the working surface is vertically downward.

[0042] The heat conduction mechanism 7 includes a heat conduction plate 12 and a heat plate support strip 13, and is used to conduct cold and assist refrigeration. The heat conduction mechanism 7 is located below the refrigerating device 6. The top of the heat conduction plate 12 is against the refrigerating device 6, and the bottom of the heat conduction plate 12 is against the heat plate support strip 13.

[0043] The screw clamp 8 is used to fix the screw, and can be replaced to adapt to screws of different sizes. The screw clamp 8 is provided with a plurality of groups of fixing holes 15, and is slidingly clamped in the clamping groove 14 of the heat conduction plate 12.

[0044] Inert gas supplement pipe 9: inert gas is introduced into the vacuum chamber to prevent the influence of active gas on spraying. The shape is a pipe, one end is connected to the vacuum box 1, and the other end is connected to the inert gas tank.

[0045] Coating material spray gun 10: spray coating material, located in the lower center of the vacuum box 1, connected with the material conveying mechanism;

[0046] Electron gun 11: emits a high-energy electron beam to evaporate the coating material into gaseous particles, located in the lower center of the vacuum box 1, perpendicular to the coating material spray gun 10;

[0047] Heat conduction plate 12: conducts the cold energy of the refrigerator 6, provided with a clamping groove 14 to fix the screw clamp 8, located between the refrigerator 6 and the heat plate support strip 13, with the clamping groove 14 cooperating with the screw clamp 8;

[0048] Heat plate support strip 13: supports the heat conduction plate 12, located on the lower side of the refrigerator 6 in the vacuum box 1, supporting the bottom of the heat conduction plate 12;

[0049] Clamping groove 14: used for fixing the screw clamp 8, opened on the heat conduction plate 12, and slidingly matched with the screw clamp 8;

[0050] Fixing hole 15: used for fixing the screw, with different hole diameters to adapt to different screws, opened on the screw clamp 8, with internal threads corresponding to the screw;

[0051] Purifier 16: filters the coating material in the vacuum box 1 to prevent the negative pressure vacuum machine 3 from being blocked, installed at the input end of the negative pressure vacuum machine 3, with a filter core with a filter membrane inside.

[0052] Working principle: the working of the device begins with the creation of a vacuum environment. The negative pressure vacuum machine 3 is connected to the inner chamber of the vacuum box 1, and after starting, it will extract the air in the vacuum box 1, thereby forming a vacuum environment. In addition, the input end of the negative pressure vacuum machine 3 is provided with a purifier 16, and the filter element inside can effectively filter the coating material in the vacuum box 1, prevent the coating material from accumulating and causing the negative pressure vacuum machine 3 to be blocked, and need to replace the filter element regularly to ensure the filtering effect. After the vacuum environment is created, the spraying mechanism 5 starts to work. The coating material spraying gun 10 in the spraying mechanism 5 is connected with the material conveying mechanism, and the coating material is sprayed into the vacuum box 1. At the same time, the electron gun 11 plays a key role, which contains structures such as electron emission electrode, acceleration electric field and deflection coil, and can emit high-energy electron beam. When the high-energy electron beam hits the coating material, the coating material obtains enough energy to evaporate and convert into gaseous particles. According to the principle of thermodynamics, these gaseous particles will do random thermal motion in the vacuum box 1 and uniformly distribute in space. This uniform distribution lays the foundation for forming a uniform coating on the surface of the screw. By controlling the coating time and the amount of coating material, the thickness of the coating can be accurately controlled. In order to make the gaseous particles condense on the surface of the screw to form a nanoscale film, the refrigerator 6 and the heat conduction mechanism 7 work together. The refrigerator 6 fixedly installed at the top of the vacuum box 1 recommends using the thermoelectric effect to refrigerate, and its working surface is vertically downward. The heat conduction mechanism 7 is composed of a heat conduction plate 12 and two groups of heat plate support strips 13, and the top of the heat conduction plate 12 abuts against the working surface of the refrigerator 6, and the bottom abuts against the two groups of heat plate support strips 13. The refrigerator 6 provides a cold source, and since the suspended particles in the vacuum box 1 will be affected by the earth's gravity, the refrigerator 6 must be installed above to achieve a temperature gradient. According to the principle of heat diffusion, gaseous coating particles will tend to diffuse from high-temperature areas to low-temperature areas, so the refrigerator 6 not only drives gaseous particles to condense on the surface of the screw as a cold source, but also offsets the effect of gravity by providing a temperature difference, ensuring that gaseous particles can uniformly condense on the surface of the screw to form a uniform nanoscale coating. The screw clamp 8 is provided with a plurality of fixing holes 15, and the fixing holes 15 are processed with internal threads corresponding to the screw. The heat conduction plate 12 is provided with a clamping groove 14 corresponding to the screw clamp 8, and the screw clamp 8 is slidingly clamped in the clamping groove 14. The screw clamp 8 is provided with a plurality of groups, and the hole diameters of the fixing holes 15 on each group are different. This design makes the device have wide applicability and can adapt to screws of different sizes to meet diversified production needs. In the whole process, the inert gas supplement pipe 9 also plays an important role. It is connected with the inert gas tank, and by introducing a small amount of inert gas into the vacuum box 1, it can prevent the active gas in the air from affecting the nanoscale coating spraying operation when the vacuum chamber is not completely evacuated, further ensuring the uniformity of the coating thickness and improving the spraying quality of the nanoscale coating.In summary, the environmental protection vacuum spraying device of the nano-coated screw realizes high-quality and uniform plating of the screw nano-coating under the conditions of precise control of the vacuum environment, temperature gradient and plating material supply through the synergistic work of various components, and has wide applicability and good environmental protection performance.

[0053] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly vacuum spray coating apparatus for nanocoated screws, characterized by: The utility model provides a kind of vacuum box (1), vacuum box (1) is provided with hinged closed door (2) of opening and closing, vacuum box (1) is provided with negative pressure vacuum machine (3) on one side, the input end of negative pressure vacuum machine (3) is connected with vacuum box (1) inner chamber seal, the upper portion of negative pressure vacuum machine (3) is provided with pressure relief valve pipe (4), pressure relief valve pipe (4) is arranged in the side wall of vacuum box (1), and is connected with the inner chamber of vacuum box (1) and atmosphere, the inner chamber of vacuum box (1) is provided with spraying mechanism (5), refrigerator (6), heat conduction mechanism (7) and screw clamp (8), screw clamp (8) is fixed with multiple groups of screw rods, vacuum box (1) is provided with inert gas supplement pipe (9) on the side away from negative pressure vacuum machine (3), and inert gas supplement pipe (9) is connected with inert gas gas tank.

2. The environment-friendly vacuum spraying device for nano-coated screw according to claim 1, characterized in that: The spraying mechanism (5) includes a coating material spray gun (10) and an electron gun (11), the coating material spray gun (10) is arranged at the lower center of the vacuum box (1), and the other end of the coating material spray gun (10) is connected with a material conveying mechanism, the electron gun (11) is also arranged at the lower center of the vacuum box (1), and the coating material spray gun (10) and the electron gun (11) are perpendicular to each other.

3. The environment-friendly vacuum spraying device for nano-coated screw according to claim 1, characterized in that: The refrigerator (6) is fixedly installed at the top of the vacuum box (1), and the working surface of the refrigerator (6) is vertically downward, the heat conduction mechanism (7) includes a heat conduction plate (12) and two groups of heat plate support strips (13), the two groups of heat plate support strips (13) are arranged at the lower side of the refrigerator (6) in the vacuum box (1), and the heat conduction plate (12) is arranged between the two groups of heat plate support strips (13) and the refrigerator (6), the top of the heat conduction plate (12) abuts against the working surface of the refrigerator (6), and the bottom of the heat conduction plate (12) abuts against the two groups of heat plate support strips (13).

4. The environment-friendly vacuum spraying device for nano-coated screw according to claim 3, characterized in that: The screw clamp (8) is provided with a plurality of fixing holes (15), and the fixing holes (15) are provided with internal threads corresponding to the screw rods, the heat conduction plate (12) is provided with a clamping groove (14) corresponding to the screw clamp (8), and the screw clamp (8) is slidingly clamped in the clamping groove (14).

5. The environmentally friendly vacuum spray coating device for nano-coated screws of claim 1, wherein: The input of the negative pressure vacuum machine (3) is provided with a purifier (16), and the purifier (16) is provided with a filter core with a filter membrane.

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