WO2019019003A1 - Procédé de fabrication de plaque d'immatriculation de véhicule automobile - Google Patents

Procédé de fabrication de plaque d'immatriculation de véhicule automobile Download PDF

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Publication number
WO2019019003A1
WO2019019003A1 PCT/CN2017/094256 CN2017094256W WO2019019003A1 WO 2019019003 A1 WO2019019003 A1 WO 2019019003A1 CN 2017094256 W CN2017094256 W CN 2017094256W WO 2019019003 A1 WO2019019003 A1 WO 2019019003A1
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WO
WIPO (PCT)
Prior art keywords
layer
manufacturing
substrate
automobile
plating
Prior art date
Application number
PCT/CN2017/094256
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English (en)
Chinese (zh)
Inventor
钱庙根
李逢春
季明明
Original Assignee
湖州泰和汽车零部件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖州泰和汽车零部件有限公司 filed Critical 湖州泰和汽车零部件有限公司
Priority to PCT/CN2017/094256 priority Critical patent/WO2019019003A1/fr
Publication of WO2019019003A1 publication Critical patent/WO2019019003A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes

Definitions

  • Automobile signs are a symbol of automobile brands. They are often attached to the front and rear of the car, and the position is centered for marking and easy identification. Automobile signs generally have silver-colored areas and color areas. For example, the public signage only has the "v" "w” pattern and the circle outside the pattern is silver and bright, and the rest is the color area. The silver and bright areas of various signs are different. Since existing vehicles are equipped with radar, it is necessary for the vehicle signs to ensure that the radar waves pass through without affecting the radar work, especially for vehicles with adaptive cruise systems, the front radar is used to judge and the preceding vehicles. Distance, in response to such distance and other parameters to adjust the speed of the vehicle, etc. For such applications, automotive signs can be very important to penetrate radar waves.
  • ACC Adaptive Cruise Control
  • the prior art such as the patent CN183842B, provides a metallic lustrous decorative article for use in a beam path of a radar device, comprising a substrate composed of a transparent resin layer, tin and/or tin disposed on the back surface of the substrate. An alloy layer, and a decorative lacquer layer disposed on the back side of the tin and/or tin alloy layer.
  • the molded article described in this patent has a delicate metal design similar to that of chrome plating, and ensures that the transmission loss of the radar millimeter wave is 1. 6 to 1.8 db.
  • the present invention provides a method of manufacturing an automobile sign. It not only retains the silvery, hard and unique appearance inherent in most automobile signs, but also meets the requirements of radar wave round-trip transmission loss below 1.4db.
  • a vehicle sign manufacturing method characterized in that, in order comprises the following steps:
  • injection molding transparent substrate by injection molding to form a variety of shaped signage substrate
  • substrate pretreatment pre-treatment of the (1) formed label substrate
  • paint layer painted on the surface formed by (4), to meet the color requirements of the area outside the silver bright color coating, the same can also play the role of protecting the vacuum coating;
  • protective lacquer layer spraying a protective lacquer layer on the other surface of the label substrate obtained by (5);
  • bonding with the pedestal will be treated by (6) The label substrate is bonded to the base;
  • Inspection packaging The product is inspected after the (7) processed label, and the label is attached and stored in the warehouse.
  • Vacuum plating is directly performed after the pretreatment of the substrate is completed, which reduces the processes of spraying primer or hot stamping or printing in other schemes, thereby avoiding the risk of dust, stains, moisture and the like in the production process.
  • This scheme has the greatest impact on the pass rate of finished products, and the pass rate is significantly higher, increasing from 60% ⁇ 68 ⁇ 3 ⁇ 4 to over 85%, resulting in increased production capacity and significantly reduced production costs.
  • Vacuum coating is a key technology of the present invention, especially an indium-plated alloy, and the film thickness is controlled at 10 to 60 nm, which enhances the stability of the film layer, thereby improving the yield of the film, requiring a film.
  • the thickness is much smaller than the electron mean free path, and the metal film structure does not reach complete continuity, so that the surface resistance of the metal film is large, that is, the sheet resistance is 20 k ⁇ or more.
  • Spraying the protective lacquer layer after deplating can avoid defects such as cracking of the sign substrate due to external air or sunlight, yellowing after aging, and the same can make the sign more resistant to gravel.
  • the physical impact, and the water absorption of the sign is less than 0.1%, it can ensure that the radar wave can be transmitted normally under normal rainy weather, wherein the UV is cured by ultraviolet radiation and is more environmentally friendly.
  • the overall thickness and material of the substrate have a great influence on the penetration of the millimeter wave, and therefore the thickness needs to be uniform in the range of the cone of the radar.
  • the transparent substrate is used to satisfy the shape of the automobile sign, and the base is bonded together to meet the overall thickness requirement of the sign, and the thickness requirements of the sign are determined according to the different emission wavelengths of the radar.
  • the dielectric constant of the transparent substrate and the pedestal should be as close as possible or close to each other.
  • the gap between the transparent substrate and the pedestal should be ⁇ 0.21 ⁇ otherwise the air between the two will affect the radar wave function or increase the attenuation. .
  • the transparent substrate in the step (1) is made of polycarbonate, which is heat-resistant, impact-resistant, creep-resistant and dimensionally stable.
  • the pre-treatment in the step (2) is specifically performing electrostatic dust removal on the substrate, warming and de-stressing, then dusting with a brush, and finally cleaning with dry ice.
  • Remove the stress of the substrate by baking to a certain temperature, and then neutralize the surface of the substrate by neutralizing the surface of the substrate with high-speed airflow, and then use the brush
  • the ostrich hair brush machine acts on the surface of the substrate, disturbs the scouring action, removes the dust on the surface of the substrate, and is carried away by the airflow.
  • the substrate is cleaned with dry ice, so that the pretreatment is thoroughly performed to ensure the coating. the quality of.
  • the indium alloy layer and the protective layer are plated by vacuum evaporation, and the evaporation source for plating the protective layer is an e-type electron gun.
  • the total thickness of the indium alloy layer and the protective plating layer in the step (3) is less than 1 ⁇ m.
  • the thickness of the indium alloy layer in the step (3) is controlled to be 10 to 60 nm, the film thickness is much smaller than the electron mean free path, and the metal thin film structure is not completely continuous.
  • the protective film layer in the step (3) is an oxide film layer whose composition is silica.
  • the silica composition and thickness of the oxide protective layer help to protect the nano metal layer, so that the millimeter wave emitted by the radar can pass through the protective cover, and there is almost no attenuation, and the sign has a better metallic luster.
  • the obvious signage of the sign and the effectiveness of the radar are guaranteed to ensure the safety of the driving.
  • the solution used in the chemical mode in the step (4) is a NaOH solution.
  • the coating which is not protected by the enamel coating is dissolved by the NaOH solution, and the temperature of the solution is controlled at 60 ° C to 80 ° C. The deplating effect is best in this temperature range. After the deplating is completed, the surface of the label is cleaned with pure water to ensure There are no residual reagents.
  • the solvent of the NaOH solution is deionized water or distilled water, and the solute includes NaOH, NaSi03, sodium hydroxyethylidene diphosphonate, a corrosion inhibitor and a surfactant, wherein the solution is strongly alkaline after the NaOH and NaS are dissolved in water.
  • Sodium hydroxyethylidene diphosphinate acts as a chelating agent and forms compounds with both coordinating bonds and covalent bonds with metal indium ions.
  • the etchant protection label substrate is not corroded by the NaOH solution.
  • One or more of sodium aluminate, sodium nitrite and sodium nitrate may be selected, preferably sodium aluminate.
  • the surfactant reduces the surface tension of water and helps the dioxide.
  • the silicon is uniformly dissolved in the NaOH solution, and the sodium butyl naphthalene sulfonate is selected. The content of each component of the solute is: NaOH (25 ⁇ 5 Og/L), sodium silicate (150 ⁇ 185)
  • 1 is a schematic view showing the relationship between the various levels of the automobile sign and the orientation of the automobile sign and the radar;
  • FIG. 2 is a process road diagram of a method for preparing an automobile sign according to an embodiment of the present invention
  • the placard corresponds to a radar frequency of 24.1 GHz, and the total thickness of the parts (section 1-5) is 7.65 ⁇ 0.15 mm.
  • the transparent substrate and the pedestal are made of thermoplastic engineering plastic polycarbonate, which is heat and shock resistant. Resistance to creep and dimensional stability.
  • the stress relief baking is performed at 110 ° C for 2 hours. After the baking is completed, the label substrate is loaded into the vacuum plating tool to remove dust and static electricity.
  • the vacuum plating layer is divided into two layers, the total thickness is less than 1 ⁇ , the first indium alloy layer is plated, and the thickness is controlled at 10 nm ⁇ 2
  • the film thickness is required to be much smaller than the electron mean free path, and the metal film structure does not reach complete continuity.
  • the surface resistance of the metal film is large, that is, the sheet resistance is 20 k ⁇ or more.
  • a second layer of a silicon oxide oxide is applied to protect the indium alloy layer.
  • Spray paint layer 3 the other parts of the vacuum coating are required to be black, so the black paint is sprayed, and the paint can also protect the vacuum coating without affecting the appearance and performance of the label substrate.
  • the surface of the transparent substrate is sprayed with UV to form the coating layer 4, so as to ensure that the sign does not have defects such as yellowing after aging, and the same can make the sign resistant to the impact of the stone. , and the water absorption of the sign is less than 0.1%, thus ensuring that the signage radar wave can be transmitted normally in normal rainy weather.
  • the base 5 is glued with the glue, and the thickness of the radar wave penetration receiving area of the control product is controlled within the range of 7.65 ⁇ 0.15 mm, and the gap between the label substrate and the base is less than 0.2.
  • Mm a unidirectional gas permeable membrane is attached to the back of the base to allow the water vapor between the transparent sign and the pedestal to be discharged, and the water vapor will not enter. , will not interfere with the penetration of radar waves by water vapor.
  • the sign corresponds to a radar frequency of 24.1 GHz, and the total thickness of the parts (section 1-5) is 7.65 ⁇ 0.15 mm.
  • the transparent substrate and the base are made of thermoplastic engineering plastic polycarbonate, which is heat and shock resistant. Resistance to creep and dimensional stability.
  • the transparent substrate is formed into a desired shape of the label substrate 1 by injection molding. After the injection molding of the sign substrate, it needs to be destressed and baked at 110 ° C for 2 h. After the baking is completed, the label substrate is placed in a vacuum plating tool to remove dust and static electricity.
  • the vacuum plating layer is divided into two layers, the total thickness is less than 1 ⁇ m, the first indium alloy layer is plated, the thickness is controlled at 25 nm to 45 nm, the film thickness is required to be much smaller than the electron mean free path, and the metal film structure is not completely continuous. Therefore, the surface resistance of the metal film is large, that is, the sheet resistance is 20 k ⁇ or more.
  • a second layer of a silicon oxide oxide is applied to protect the indium alloy layer.
  • the vacuum-plated label is coated with a resist paint at a position where the plating layer needs to be retained to protect the plating layer, and then placed in a prepared NaOH solution for deplating, requiring the solution temperature to be 70 ° C, deplating After completion, the surface of the sign must be cleaned with pure water. There must be no residual reagents.
  • the deplating area is shown by a dotted line in Figure 1.
  • Spray paint layer 3 the other parts of the vacuum coating are required to have a black color, so the black paint is sprayed, and the paint can also protect the vacuum coating without affecting the appearance and performance of the label substrate.
  • the surface of the transparent substrate is sprayed with UV to form the coating layer 4, so as to ensure that the sign does not have defects such as yellowing after aging, and the same can make the sign resistant to the impact of the stone. , and the water absorption of the sign is less than 0.1%, thus ensuring that the signage radar wave can be transmitted normally in normal rainy weather.
  • the base 5 is glued with the glue, and the thickness of the radar wave penetration receiving area of the control product is controlled within the range of 7.65 ⁇ 0.15 mm, and the gap between the label substrate and the base is less than 0.2. Mm, a unidirectional gas permeable membrane is attached to the back of the base to allow the water vapor between the transparent sign and the pedestal to be discharged, and the water vapor will not enter, and the water vapor will not interfere with the penetration of the radar wave. [0071] After the product has passed the inspection, it is labeled and stored in the warehouse.
  • the placard corresponds to a radar frequency of 24.1 GHz, and the total thickness of the parts (section 1-5) is 7.65 ⁇ 0.15 mm.
  • the transparent substrate and the pedestal are made of thermoplastic engineering plastic polycarbonate, which is heat and shock resistant. Resistance to creep and dimensional stability.
  • the transparent substrate is formed into a desired shape of the label substrate 1 by injection molding. After the injection molding of the sign substrate, it needs to be destressed and baked at 110 ° C for 2 h. After the baking is completed, the label substrate is placed in a vacuum plating tool to remove dust and static electricity.
  • the vacuum coating layer 2 is divided into two layers, the total thickness is less than 1 ⁇ m, the first indium alloy layer is plated, the thickness is controlled at 45 nm ⁇ 6 Onm, the film thickness is required to be much smaller than the electron mean free path, and the metal film structure is not completely continuous. Therefore, the surface resistance of the metal film is large, that is, the sheet resistance is 20 k ⁇ or more.
  • a second layer of a silicon oxide oxide is applied to protect the indium alloy layer.
  • the vacuum-plated label is coated with a resist paint at a position where the plating layer needs to be retained to protect the plating layer, and then placed in a prepared NaOH solution for deplating, requiring the solution temperature to be 70 ° C, deplating After completion, the surface of the sign must be cleaned with pure water. There must be no residual reagents.
  • the deplating area is shown by a dotted line in Figure 1.
  • Spray paint layer 3 the other parts of the vacuum coating are required to have a black color, so the black paint is sprayed, and the paint can also protect the vacuum coating without affecting the appearance and performance of the label substrate.
  • the surface of the transparent substrate is sprayed with UV to form the coating layer 4, so as to ensure that the sign does not have defects such as yellowing after aging, and the same can make the sign resistant to the impact of the stone. , and the water absorption of the sign is less than 0.1%, thus ensuring that the signage radar wave can be transmitted normally in normal rainy weather.
  • the base 5 is glued with the glue, and the thickness of the radar wave penetration receiving area of the control product is controlled within the range of 7.65 ⁇ 0.15 mm, and the gap between the label substrate and the base is less than 0.2.
  • a unidirectional gas permeable membrane is attached to the back of the base to allow the water vapor between the transparent sign and the pedestal to be discharged, and the water vapor will not enter, and the water vapor will not interfere with the penetration of the radar wave.
  • Embodiment 4 After the product has passed the inspection, it is labeled and stored in the warehouse. Embodiment 4
  • the difference is in the NaOH solution required for the deplating process, the solvent is 1L deionized water, the solute is NaOH 25g, sodium silicate 150g, sodium hydroxyethylidene diphosphonate 10g, sodium aluminate 2g , sodium butyl naphthalene sulfonate l g , the preparation method thereof comprises the following:
  • the difference is in the NaOH solution required for the deplating process, the solvent is 1L deionized water, the solute is NaOH 50g, sodium silicate 185g, sodium hydroxyethylidene diphosphonate 50g, sodium aluminate 5g , sodium butyl naphthalene sulfonate 5g, the preparation method thereof comprises the following:
  • the difference is in the NaOH solution required for the deplating process, the solvent is 1L deionized water, the solute is NaOH 38g, sodium silicate 168g, sodium hydroxyethylidene diphosphonate 30g, sodium aluminate 3g , sodium butyl naphthalene sulfonate 3g , the preparation method thereof comprises the following:
  • the inventors prepared 1L samples according to the NaOH solution configuration methods in Examples 4, 5, and 6 respectively. The amount of substrate corrosion, the amount of dissolved indium and the stability of each sample were measured.
  • the detection method is:
  • the test results are as follows: In the fourth embodiment, the NaOH solution substrate corrosion rate is 0.05g, the dissolved indium amount is 140g, and the stability is 188 days; in the fifth embodiment, the NaOH solution substrate corrosion amount is 0.06g, the dissolved indium amount is 156g, and the stability is stable. In the sixth embodiment, the NaOH solution substrate has a corrosion amount of 0.04 g, an indium content of 168 g, and a stability of 210 days. It can be clearly seen from the above test results that the configuration method of the NaOH solution is the best in the sixth embodiment, the deplating solution is stable, the deplating effect is good, the deplating speed is fast, and the process is simple.
  • the automobile sign of a certain type of automobile has a radar frequency of 24.1 GHz, and the total thickness of the parts is 7.65 ⁇ 0.15 mm, and the transparent substrate and the base are thermoplastic engineering plastics. Polycarbonate, heat and impact resistant, creep resistant and dimensionally stable.
  • the manufacturing process of this product mainly includes injection molding, pre-treatment, hot stamping, first plating, second plating, and spray coating.
  • Injection molding The transparent substrate is formed into a desired label substrate by injection molding.
  • Pre-treatment After injection molding of the sign substrate, it is necessary to perform stress-free baking at 110 ° C for 2 h, and perform electrostatic dust removal after baking.
  • Hot Stamping Cover the area where the sign is not required to be bright, and then cover the surface of the label substrate with a black film or a color film according to the label.
  • a nano-indium alloy layer is plated by magnetron sputtering or vacuum evaporation, and the thickness thereof is controlled to be 10 nm to 60 nm, and the surface resistance is 20 k ⁇ or more.
  • Second plating The silicon dioxide protective layer is plated by magnetron sputtering or electron beam vacuum plating.
  • Spraying protective lacquer layer UV lacquer is sprayed on the surface of the silica protective layer, and UV lacquer is also sprayed on the other surface of the label substrate, and cured by ultraviolet irradiation.
  • Dispensing The dispensing substrate is tightly bonded to the base by dispensing.
  • Milling gate Milling the excess handle on the injection molded body.
  • Inspection packaging After the product is inspected, the label is attached and sent to the warehouse for storage.
  • the inventors conducted several experiments to improve the pass rate of the sign to improve the pass rate of the sign, and found that the total thickness of the two-layer film plated by vacuum plating is less than lum, and the thickness of the indium alloy layer is 25 nm to 45 nm.
  • the surface resistance of the indium alloy layer is more than 20 kohms and does not reach a continuous structure.
  • the resulting sign has the lowest attenuation rate of 1.3 db or less, and the pass rate of the same sign is achieved. More than 85%.
  • the present invention relates to a method for manufacturing an automobile signage, which can provide a good metal texture, sufficient strength, high reliability, and long service life, and affect the transmission of radar electromagnetic waves.
  • This sign is suitable for various radar systems installed in modern cars. It can effectively ensure driving safety and avoid some traffic accidents caused by radar blind spots or radar wave transmission attenuation.
  • the automobile sign making method of the invention it is possible to ensure that the signboard has a decay rate of less than 1.4 db, and the pass rate of the sign is more than 85%.

Abstract

L'invention concerne un procédé de fabrication d'une plaque d'immatriculation de véhicule automobile, ledit procédé étant appliqué dans un système d'aide à la conduite. Le procédé comprend les étapes suivantes : le moulage par injection, dans lequel des matériaux de base de plaque d'immatriculation de diverses formes sont formés par moulage par injection ; le prétraitement des matériaux de base, les matériaux de base obtenus étant soumis à des traitements d'enlèvement de poussière et d'élimination électrostatique ; le placage sous vide, deux couches de placage sous vide, c'est-à-dire une couche de placage d'alliage d'indium et une couche de placage de protection d'oxyde, étant formées sur les surfaces des matériaux de base au moyen d'un procédé de placage sous vide, l'épaisseur totale étant inférieure à 1 µm, et l'épaisseur de la couche de placage d'alliage d'indium étant contrôlée de manière à être comprise entre 10 et 60 nm ; le déplacage, selon les exigences pour différentes plaques d'immatriculation de véhicule automobile, une peinture résistante au placage étant appliquée sur les couches de placage sous vide puis un traitement de déplacage étant réalisé ; l'application d'une couche de peinture colorée ; l'application d'une couche de peinture protectrice ; la liaison à une base ; et l'inspection et l'emballage. Le procédé de fabrication d'une plaque d'immatriculation de véhicule automobile peut garantir qu'une plaque d'immatriculation présente une bonne impression métallique, une résistance suffisante, une stabilité élevée, une longue durée de vie et un bon taux de qualification de production, et la performance d'un radar n'est en outre pas affectée.
PCT/CN2017/094256 2017-07-25 2017-07-25 Procédé de fabrication de plaque d'immatriculation de véhicule automobile WO2019019003A1 (fr)

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PCT/CN2017/094256 WO2019019003A1 (fr) 2017-07-25 2017-07-25 Procédé de fabrication de plaque d'immatriculation de véhicule automobile

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PCT/CN2017/094256 WO2019019003A1 (fr) 2017-07-25 2017-07-25 Procédé de fabrication de plaque d'immatriculation de véhicule automobile

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110846619A (zh) * 2019-10-29 2020-02-28 宁波四维尔工业有限责任公司 一种塑料汽车标牌表面着色工艺

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Publication number Priority date Publication date Assignee Title
CN102514533A (zh) * 2011-12-15 2012-06-27 宁波四维尔工业股份有限公司 一种能满足雷达主动巡航功能的汽车标牌的制作方法
CN103112410A (zh) * 2013-01-31 2013-05-22 广州市金钟汽车零件制造有限公司 一种汽车标牌及其制造方法和应用
KR20160131324A (ko) * 2015-05-06 2016-11-16 한국내쇼날주식회사 적응적 크루즈 컨트롤 엠블렘 및 이의 제조 방법
CN106608020A (zh) * 2015-10-23 2017-05-03 广州汽车集团股份有限公司 汽车标牌制造工艺

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102514533A (zh) * 2011-12-15 2012-06-27 宁波四维尔工业股份有限公司 一种能满足雷达主动巡航功能的汽车标牌的制作方法
CN103112410A (zh) * 2013-01-31 2013-05-22 广州市金钟汽车零件制造有限公司 一种汽车标牌及其制造方法和应用
KR20160131324A (ko) * 2015-05-06 2016-11-16 한국내쇼날주식회사 적응적 크루즈 컨트롤 엠블렘 및 이의 제조 방법
CN106608020A (zh) * 2015-10-23 2017-05-03 广州汽车集团股份有限公司 汽车标牌制造工艺

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110846619A (zh) * 2019-10-29 2020-02-28 宁波四维尔工业有限责任公司 一种塑料汽车标牌表面着色工艺

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