無氣噴涂原理、優缺點

Any fluid put under high pressure and forced to pass through a small orifice reaches a very high speed and the consequent impact with air determines its splitting in small drops. 

流體在高壓驅動下以高速通過一個細微的孔徑時,經過于空氣的連續撞擊將其分離成細小的液滴.

The necessary pressure to obtain the paint atomization is proportional to the viscosity and molecular cohesion of the paint itself.

 油漆霧化所需要的壓力與油漆自身的粘度和分子內聚力成比例.

An Airless gun work essentially as a fluid valve with a nozzle holder in front. The only function of the gun is to simply open and close the material valve. No atomizing air is required. 

一把無氣噴槍本質上來講就是一個前端帶有噴嘴的流體閥.噴槍的唯一功能就是簡單開啟和關閉這個流體閥.不需要額外的霧化空氣.

The size and shape of the jet can only be altered by changing the nozzle. The diameter of the nozzle bore determines the material flow volume, while the size and geometry of the elliptically shaped nozzle opening determine the height and width of the jet. 

噴涂的扇面大小只能通過更換噴嘴來實現. 噴嘴開孔的尺寸決定了噴涂的油漆流量.而噴嘴橢圓型的幾何形狀和大小決定了噴涂的高度和寬度.

Airless applications  無氣噴涂應用


Airless is particularly well suited to 無氣噴涂特別適用于:
 High viscosity materials, high and ultra-high solid paints 高粘度材料,高/超高固含量油漆
 High speed application 高速生產應用
 Large surfaces 大面積噴涂應用
 Anticorrosion and protective coatings applications 防腐等保護性涂層應用


Example of application areas 應用領域舉例:
 Heavy carpentry 重型木工廠
 Shipyards 造船業
 Freight wagons, Shipping containers 貨車,集裝箱 
 Windmill blades and tower 風電葉片及塔筒
 Refineries and petrochemical plants 精煉和石化工廠
 Water and oil pipelines 水管和輸油管道
 Off-shore and coastal installations 沿海工廠
 Infrastructures 基礎設施

Airless atomization 無氣霧化優缺點


ADVANTAGES 優點
 High speed application 高速噴涂應用
 Low over-spray, high transfer efficiency 低過噴,高轉播效率
 High delivery for high surface coverage power 高表面覆蓋能力
 High material viscosities can be applied 可用于高粘度材料
 Hose lengths up to 100m are possible 噴涂管路最長可達100米

DISADVANTAGES 缺點
 Poor surface quality 較差的表面質量
 Pattern shape can only be adjusted by changing nozzle 噴涂扇面只能通過更換噴嘴來調節
 Not suitable for most metalized materials or high abrasives (i.e.  ceramic) 不適用于大部分金屬漆或高磨蝕性材料(如陶瓷)