阅读说明：本技术 一种建筑装饰铝单板的静电粉末喷涂施工方法 (Electrostatic powder spraying construction method for architectural decoration aluminum veneer ) 是由 陈华 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种建筑装饰铝单板的静电粉末喷涂施工方法,其特征在于,包括以下步骤：步骤1、脱脂,除去铝单板表面的工艺润滑油、防锈油和其他污物以保证在碱腐蚀工序中铝材表面均匀腐蚀和槽液清洁,脱脂方法一般采用：碱性溶液脱脂、酸性溶液脱脂、有机溶剂脱脂、表面活性剂脱脂、电解脱脂、乳化脱脂,优选碱性溶液脱脂；本施工方法制作后的铝单板其表面会形成一层涂层,该涂层不仅能为幕墙铝单板表面增加色泽,更能有效地隔绝外界对幕墙铝单板主材的污染,在机械强度、附着力、耐腐蚀、耐老化、耐受紫外线等方面优于传统喷漆工艺和贴层工艺,且成本更低。(The invention discloses an electrostatic powder spraying construction method of an architectural decoration aluminum veneer, which is characterized by comprising the following steps: step 1, degreasing, namely removing process lubricating oil, antirust oil and other dirt on the surface of the aluminum veneer to ensure uniform corrosion of the surface of the aluminum material and cleaning of tank liquor in an alkali corrosion process, wherein the degreasing method generally comprises the following steps: alkaline degreasing, acidic degreasing, organic degreasing, surfactant degreasing, electrolytic degreasing, and emulsion degreasing, preferably alkaline degreasing; the surface of the aluminum veneer manufactured by the construction method can form a coating, the coating can not only increase the color of the surface of the curtain wall aluminum veneer, but also effectively isolate the external pollution to the main material of the curtain wall aluminum veneer, is superior to the traditional paint spraying process and the coating process in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance, ultraviolet resistance and the like, and has lower cost.)

1. The electrostatic powder spraying construction method of the architectural decoration aluminum veneer is characterized by comprising the following steps:

step 1, degreasing, namely removing process lubricating oil, antirust oil and other dirt on the surface of the aluminum veneer to ensure uniform corrosion of the surface of the aluminum material and cleaning of tank liquor in an alkali corrosion process, wherein the degreasing method generally comprises the following steps: alkaline degreasing, acidic degreasing, organic degreasing, surfactant degreasing, electrolytic degreasing, and emulsion degreasing, preferably alkaline degreasing;

step 2, alkaline etching and washing, namely performing alkaline etching and washing on the aluminum veneer by using 40-80g/L NaOH as a treatment solution;

step 3, neutralization, namely removing black stains remained on the surface of the aluminum single plate after the alkali corrosion by using 150-350g/L HNO3 or 80-180g/L H2SO4 as a neutralization solution to obtain a bright metal surface and simultaneously have the function of neutralizing alkali liquor;

step 4, drying, namely placing the aluminum veneer into a drying box for drying to ensure that the surface of the aluminum veneer is anhydrous;

step 5, electrostatic powder spraying, wherein an aluminum single plate enters a spray gun position of a powder spraying room through a conveying chain to prepare spraying operation, a high-voltage electrostatic negative electrode is released to a space in the direction of a workpiece through an electrode needle at a gun opening of the spray gun by an electrostatic generator, the high-voltage electrostatic enables a mixture of powder sprayed out of the gun opening and compressed air and air around the electrode to be ionized and carry negative charges, the workpiece is grounded through the conveying chain through a hanger, an electric field is formed between the spray gun and the aluminum single plate by a grounding electrode, and the powder reaches the surface of the workpiece under double pushing of electric field force and compressed air pressure in the spray gun and is attracted to form a uniform coating on the surface of the workpiece by virtue of electrostatic attraction;

step 6, baking and curing, wherein the sprayed aluminum veneer is conveyed into a drying room through a conveying chain to be heated to be melted, leveled and cured, and the sprayed surface effect of the aluminum veneer can be obtained;

step 7, finished product inspection, wherein whether the surface of the finished product aluminum veneer has spraying defects is inspected;

and 8, packaging, namely placing the inspected aluminum veneers in a transport vehicle and a turnover box in a classified manner, and isolating the aluminum veneers with soft package buffer materials such as a foaming paper bubble film and the like to prevent scratching and abrasion.

2. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: and a water washing procedure is arranged among the three procedures of the step 1, the step 2 and the step 3, and the aluminum veneer is washed by flowing water so as to thoroughly remove residual liquid on the surface of the product and water-soluble reaction products.

3. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: in the step 2, 1.8g/L of sodium citrate or sodium gluconate can be added into the alkaline etching treatment solution for preventing precipitation.

4. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: in the step 3, the relative density of HNO3 is 1.5, and the relative density of H2SO4 is 1.8.

5. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: in the step 4, the temperature of the drying box is set to be 60-80 ℃, and the drying time is kept at 5-8 minutes.

6. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: in the step 5, controlling the dust content in the spray room not to be higher than 10g/m3, recovering the redundant powder discharged from the spray room by adopting cyclone separation equipment, and controlling the spraying powder quantity of the spray gun to be within the range of 60 g/min to 800 g/min.

7. The electrostatic powder spraying construction method for the architectural decoration aluminum veneer according to claim 1, characterized in that: in the step 6, the heating temperature in the drying room is controlled at 200 ℃ of 170 ℃ for 13-25 minutes.

Technical Field

The invention belongs to the technical field of aluminum veneer spraying, and particularly relates to an electrostatic powder spraying construction method for an architectural decoration aluminum veneer.

Background

The aluminum veneer is an aluminum spliced plate and a building decoration material, is suitable for building various curtain walls, and gradually replaces the traditional building plate due to the advantages of light weight and durability.

When the existing aluminum veneer is used, a surface layer is adhered on the surface of the aluminum veneer or paint is sprayed for decoration, but the two construction methods have the defects of poor mechanical strength, poor adhesion, low durability, ultraviolet intolerance, easy corrosion, easy oxidation and the like in subsequent use, and have certain defects in practical application, so the invention provides the electrostatic powder spraying construction method for the architectural decoration aluminum veneer.

Disclosure of Invention

The invention aims to provide an electrostatic powder spraying construction method of an architectural decoration aluminum veneer, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the electrostatic powder spraying construction method of the architectural decoration aluminum veneer is characterized by comprising the following steps:

step 1, degreasing, namely removing process lubricating oil, antirust oil and other dirt on the surface of the aluminum veneer to ensure uniform corrosion of the surface of the aluminum material and cleaning of tank liquor in an alkali corrosion process, wherein the degreasing method generally comprises the following steps: degreasing with an alkaline solution, degreasing with an acidic solution, degreasing with an organic solvent, degreasing with a surfactant, degreasing with electrolysis, and degreasing with emulsification, wherein the degreasing with the alkaline solution is preferred;

step 2, alkaline etching and washing, namely performing alkaline etching and washing on the aluminum veneer by using 40-80g/L NaOH as a treatment solution;

step 3, neutralization, namely removing black corrosion stains remained on the surface of the aluminum single plate after the alkali corrosion by using 150-350g/L HNO3 or 80-180g/L H2SO4 as a neutralization solution to obtain a bright metal surface and simultaneously have the function of neutralizing alkali liquor;

step 4, drying, namely placing the aluminum veneer into a drying box for drying to ensure that the surface of the aluminum veneer is anhydrous;

step 5, electrostatic powder spraying, wherein an aluminum single plate enters a spray gun position of a powder spraying room through a conveying chain to prepare spraying operation, a high-voltage electrostatic negative electrode is released to a space in the direction of a workpiece through an electrode needle at the gun mouth of the spray gun by an electrostatic generator, the high-voltage electrostatic enables a mixture of powder sprayed from the gun mouth and compressed air and air around an electrode to be ionized and carry negative charges, the workpiece is grounded through the conveying chain through a hanger, an electric field is formed between the spray gun and the aluminum single plate by a grounding electrode, and the powder reaches the surface of the workpiece under double pushing of electric field force and compressed air pressure in the spray gun and is attracted to form a uniform coating on the surface of the workpiece by virtue of electrostatic attraction;

step 6, baking and curing, wherein the sprayed aluminum veneer is conveyed into a drying room through a conveying chain to be heated to be melted, leveled and cured, and the sprayed surface effect of the aluminum veneer can be obtained;

step 7, finished product inspection, wherein whether the surface of the finished product aluminum veneer has spraying defects is inspected;

and 8, packaging, namely placing the inspected aluminum veneers in a transport vehicle and a turnover box in a classified manner, and isolating the aluminum veneers with soft package buffer materials such as a foaming paper bubble film and the like to prevent scratching and abrasion.

Preferably, a water washing procedure is arranged among the three procedures of the step 1, the step 2 and the step 3, and the purpose of washing the aluminum veneer by using flowing water is to completely remove residual liquid and water-soluble reaction products on the surface of the product.

Preferably, 1.8g/L of sodium citrate or sodium gluconate is added into the alkaline etching treatment solution in the step 2 for preventing precipitation.

Preferably, in the step 3, the relative density of the HNO3 is 1.5, and the relative density of the H2SO4 is 1.8.

Preferably, in the step 4, the temperature of the drying box is set to be 60-80 ℃, and the drying time is kept at 5-8 minutes.

Preferably, in the step 5, the dust content in the spray booth is controlled not to be higher than 10g/m3, the excessive powder discharged from the spray booth is recovered by a cyclone separation device, and the spraying amount of the spray gun is controlled within the range of 60 g/min to 800 g/min.

Preferably, in the step 6, the heating temperature in the drying room is controlled at 200 ℃ at 170 ℃ for 13-25 minutes.

Compared with the prior art, the invention has the beneficial effects that: the surface of the aluminum veneer manufactured by the construction method can form a coating, the coating can not only increase the color of the surface of the aluminum veneer of the curtain wall, but also effectively isolate the external pollution to the main material of the aluminum veneer of the curtain wall, is superior to the traditional paint spraying process and the coating process in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance, ultraviolet resistance and the like, and has lower cost.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Examples

The invention provides a technical scheme that: the electrostatic powder spraying construction method of the architectural decoration aluminum veneer is characterized by comprising the following steps:

step 1, degreasing, namely removing process lubricating oil, antirust oil and other dirt on the surface of the aluminum veneer to ensure uniform corrosion of the surface of the aluminum material and cleaning of tank liquor in an alkali corrosion process, wherein the degreasing method generally comprises the following steps: degreasing with an alkaline solution, degreasing with an acidic solution, degreasing with an organic solvent, degreasing with a surfactant, degreasing with electrolysis, and degreasing with emulsification, wherein the degreasing with the alkaline solution is preferred;

step 2, alkaline etching and washing, namely performing alkaline etching and washing on the aluminum single plate by using 40-80g/L NaOH as a treatment solution, wherein the purpose is to remove dirt on the surface of the aluminum single plate and expose matrix metal under a natural oxidation film on the surface of the aluminum single plate so as to be beneficial to smooth oxidation;

step 3, neutralization, namely removing black corrosion stains remained on the surface of the aluminum single plate after the alkali corrosion by using 150-350g/L HNO3 or 80-180g/L H2SO4 as a neutralization solution to obtain a bright metal surface and simultaneously have the function of neutralizing alkali liquor;

step 4, drying, namely placing the aluminum veneer into a drying box for drying to ensure that the surface of the aluminum veneer is anhydrous;

step 5, electrostatic powder spraying, wherein an aluminum single plate enters a spray gun position of a powder spraying room through a conveying chain to prepare spraying operation, a high-voltage electrostatic negative electrode is released to a space in the direction of a workpiece through an electrode needle at the gun mouth of the spray gun by an electrostatic generator, the high-voltage electrostatic enables a mixture of powder sprayed from the gun mouth and compressed air and air around an electrode to be ionized and carry negative charges, the workpiece is grounded through the conveying chain through a hanger, an electric field is formed between the spray gun and the aluminum single plate by a grounding electrode, and the powder reaches the surface of the workpiece under double pushing of electric field force and compressed air pressure in the spray gun and is attracted to form a uniform coating on the surface of the workpiece by virtue of electrostatic attraction;

step 6, baking and curing, wherein the sprayed aluminum veneer is conveyed into a drying room through a conveying chain to be heated to be melted, leveled and cured, and the sprayed surface effect of the aluminum veneer can be obtained;

step 7, finished product inspection, wherein whether the surface of the finished product aluminum veneer has spraying defects is inspected;

and 8, packaging, namely placing the inspected aluminum veneers in a transport vehicle and a turnover box in a classified manner, and isolating the aluminum veneers with soft package buffer materials such as a foaming paper bubble film and the like to prevent scratching and abrasion.

In this embodiment, preferably, a water washing process is provided between the three processes of step 1, step 2 and step 3, and the purpose of washing the aluminum veneer with flowing water is to completely remove the residual liquid and the water-soluble reaction product on the surface of the product.

In this embodiment, preferably, 1.8g/L sodium citrate or sodium gluconate may be added to the alkaline etching treatment solution in step 2 to prevent precipitation.

In this embodiment, preferably, in step 3, the relative density of HNO3 is 1.5, and the relative density of H2SO4 is 1.8.

In this embodiment, preferably, in step 4, the temperature of the drying oven is set to 60-80 ℃, and the drying time is kept at 5-8 minutes.

In this embodiment, it is preferable that in step 5, the dust content in the spray booth is controlled not to be higher than 10g/m3, the spray booth is cleaned to facilitate the powder not to be easily deposited in the booth to change the color of the powder, sufficient light is provided in the booth to facilitate the coating work, the surplus powder discharged from the spray booth is recovered by the cyclone device, and the spray rate of the spray gun is controlled to be in the range of 60 g/min to 800 g/min.

In this embodiment, preferably, in step 6, the heating temperature in the drying room is controlled at 170-200 ℃ for 13-25 minutes.

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