First, brief introduction

粉末喷涂是用喷粉设备（静电喷塑机）把粉末涂料喷涂到工件的表面，在静电作用下，粉末会均匀的吸附于工件表面，形成粉状的涂层；粉状涂层经过高温烘烤流平固化，变成效果各异（粉末涂料的不同种类效果）的最终涂层；粉末喷涂的喷涂效果在机械强度、附着力、耐腐蚀、耐老化等方面优于喷漆工艺，成本也在同效果的喷漆之下。粉末喷涂铝型材在正常条件下使用寿命达30年。

Powder coating is spraying equipment (electrostatic spray machine) the powder coating is sprayed onto the surface of the workpiece under the electrostatic interaction, the powder will be uniformly adsorbed on the surface of the workpiece, the formation of powder coating; powder coatings after high temperature baking leveling curing, into effect (different effect of different kinds of powder coating) the final coating; powder spraying effect on mechanical strength, adhesion, corrosion resistance, aging resistance and superior cost in spray painting process, under the same effect. The service life of the powder sprayed aluminum profile is 30 years under normal conditions.

二、系统结构

Two. System structure

一套静电粉末喷涂系统主要由一套供粉装置，一套或数套静电喷枪及控制装置，静电发生装置（通常配置在静电喷枪里面）及一套粉末回收装置组成。

A set of electrostatic powder spraying system is mainly composed of a powder supply device, a set or several sets of electrostatic spray gun and control device, electrostatic generator (usually installed in electrostatic spray gun) and a set of powder recovery device.

1、供粉装置

1. Powder feeding device

在供粉装置中，粉末处在一种流化的状态，这是通过压缩空气的作用而实现的，之后粉末通过虹吸作用被高速流动的气流带着，形成粉气混合，经过文丘里粉泵，输粉管，最终到达喷枪上。

In the powder feeding device, the powder is in a fluidized state, which is achieved by the action of compressed air. After that, the powder is carried by the high-speed flowing airflow through the siphon to form the powder gas mixture, and then reaches the spray gun through the Venturi powder pump and the powder delivery pipe.

输送到喷枪上的粉末是可以调控的，具体地说就是可以分别调整粉末和空气的参数，改变出粉量和粉末的雾化状态，从而可以实现不同的涂膜厚度，满足不同产品的需要。供粉装置有充足的能力，即便喷枪的输粉管有50英尺长，也可以提供足够的压力和流量。

The powder transported to the spray gun can be controlled. Specifically, it can adjust the parameters of powder and air separately, change the amount of powder and the atomization state of the powder, so that different film thickness can be achieved to meet the needs of different products. The power supply device has sufficient capacity to provide enough pressure and flow even if the powder pipe of the spray gun is 50 feet long.

由静电发生装置产生的高电压，低电流使位于喷枪前部的电极针在空气中放电，当粉末经枪头喷嘴喷出的时候，粉末颗粒就带上了电荷，通过静电吸附和气流输送的双重作用而到达已经接地的工件表面。

High voltage generated by electrostatic device, low current of the electrode needle is located in front of the gun discharge in the air, when the spray gun nozzle when powder, the powder particles take charge, the dual role of transport through electrostatic adsorption and airflow to the workpiece surface has been grounded.

喷枪能够产生足够的电压以保证最大程度的涂覆效果，最大电压可达100kV，当喷涂内角或深腔部位的时候，喷枪可以有效地克服法拉第笼效应，保证工件各个被要求喷涂的表面都能达到良好的覆盖和均匀的膜厚。

The gun can produce enough voltage to ensure the coating effect to the maximum extent, the maximum voltage up to 100kV, when the spraying angle or deep cavity, the gun can effectively overcome the Faraday cage effect, ensure the workpiece surface is required each spraying can achieve good coverage and uniform film thickness.

2、喷枪

2. Spray gun

喷枪的结构设计须满足粉末的充电要求，功能设计须满足各种形式的喷涂作业和各种形状的工件的喷涂要求。

The structure design of the spray gun must meet the charging requirements of the powder. The function design must meet the spraying requirements of various forms of spraying and various shapes.

粉末涂装是表面涂装技术上的一项新工艺，是以粉末形态进行涂装并形成涂膜的涂装工艺。在多种场合下可代替传统的油漆工艺。在国内外已得到广泛的应用。

Powder coating is a new technology in surface coating technology. It is a coating process of coating with powder form and forming coating. In a variety of occasions the traditional paint technology can be replaced. It has been widely used at home and abroad.

3、工艺流程

3. Process flow

三、主要特性

Three. Main characteristics

涂料由特制树脂、颜填料、固化剂及其它助剂，以一定的比例混合，再通过热挤塑和粉碎过筛等工艺制备而成。它们在常温下，贮存稳定，经静电喷涂、摩擦喷涂（热固方法）或流化床浸涂（热塑方法），再加热烘烤熔融固化，使形成平整光亮的永久性涂膜，达到装饰和防腐蚀的目的。

The coatings are made of special resins, pigments, fillers, curing agents and other additives, which are mixed in a certain proportion, and are prepared by the process of thermal extrusion and smashing and sieving. They are stored at room temperature, stable, electrostatic spraying, friction spraying (thermosetting method) or fluidized bed dipping (thermoplastics), reheating, baking, melting and solidification, so that a smooth and permanent coating can be formed to achieve the purpose of decoration and anticorrosion.

其特性有：

Its characteristics are as follows:

1、该产品不含毒性，不含溶剂和不含挥发有毒性的物质，故无中毒、无火灾、无“三废”的排放等公害的问题，完全符合国家环保法的要求。

1, the product is free from toxic, solvent free and volatile and toxic substances. Therefore, there is no public nuisance problem such as poisoning, no fire and no emissions. It is fully in line with the requirements of national environmental protection law.

2、原材料利用率高，一些知名品牌的粉末供应商生产的粉末，其过喷的粉末可回收利用，最高的利用率甚至能达99%以上。

2, the utilization rate of raw materials is high. The powder produced by some famous brand powder suppliers can be recycled and the highest utilization rate can reach more than 99%.

3、被涂物前处理后， 一次性施工，无需底涂，即可得到足够厚度的涂膜，易实现自动化操作，生产效率高， 可降低成本。

3, once the coating is disposed before, once the construction is completed, no coating is needed, and enough coating can be obtained. It is easy to realize automatic operation, high production efficiency and low cost.

4、涂层致密、附着力、抗冲击强度和韧性均好，边角覆盖率高，具有优良的耐化学药品腐蚀性能和电气绝缘性能。

4, the coating is compact, adhesive force, impact strength and toughness are good, the corner coverage rate is high, has excellent chemical corrosion resistance and electrical insulation performance.

5、粉末涂料存贮、运输安全和方便。

5, powder coating storage, transportation safety and convenience.

与传统的油漆工艺相比，粉末涂装的优点是：

Compared with the traditional painting process, the advantages of powder coating are:

1、高效：由于是一次性成膜，可提高生产率30-40%

1, high efficiency: because it is a one-time film forming, it can improve the productivity of 30-40%

2、节能：降低能耗约30%

2, energy saving: reduce energy consumption by about 30%

3、污染少：无有机溶剂挥发（不含油漆涂料中甲苯、二甲苯等有害气体）。

3, less pollution: no organic solvent volatilization (excluding toluene, xylene, and other harmful gases in paint paint).

4、涂料利用率高：可达95%以上，且粉末回收后可多次利用。

4, the utilization rate of the coating is high: up to 95%, and can be used many times after the powder is recovered.

5、涂膜性能好：一次性成膜厚度可达50-80μm，其附着力、耐蚀性等综合指标都比油漆工艺好。

5, the film performance is good: one time film thickness can reach 50-80 m, its adhesion, corrosion resistance and other comprehensive indicators are better than the paint process.

6、成品率高：在未固化前，可进行二次重喷。粉末涂装工艺种类较多，常见的有静电喷粉和浸塑两种。

6. The rate of finished product is high: before it is cured, two times can be carried out. There are many kinds of powder coating technology, there are two kinds of common electrostatic powder spraying and soaking.

粉末涂料是一种新型的不含溶剂100%固体粉末状涂料。具有不用溶剂、无污染、节省能源和资源、减轻劳动强度和涂膜机械强度高等特点。

Powder coating is a new type of solvent free 100% solid powder coating without solvent. It has the characteristics of no solvent, no pollution, energy saving and resources, reducing labor intensity and high mechanical strength of coating film.

它有三大类：热塑性粉末涂料（PE）、热固性粉末涂料、建筑粉末涂料。

It has three major categories: thermoplastic powder coatings (PE), thermosetting powder coatings, and building powder coatings.

四、工作原理

Four. The principle of work

粉末喷涂利用静电喷涂的原理把干燥粉末状物吸附在金属铝型材上经过200℃以上高温烧烤后粉状物固化成为一层约60微米厚坚固光亮的涂层。使产品表面平整光滑色泽均匀具极强的耐酸性、耐碱性、耐撞性、耐磨损能长期经受强烈紫外辐射和酸雨的侵蚀不出现涂层粉化、褪色、脱落等现象。粉末喷涂铝型材在正常条件下使用寿命达30

Powder spraying is based on the principle of electrostatic spraying. The dry powder is adsorbed on the metal aluminum profile. After baking at 200 degrees or above, the powder solidified to a 60 micron thick, strong and bright coating. The product is smooth, smooth and uniform, and has strong acid resistance, alkali resistance, crashworthiness and abrasion resistance. It can endure strong ultraviolet and acid rain for a long time without coating, fading and falling off. The service life of powder spraying aluminum profiles under normal conditions is up to 30