供应粉体涂料喷涂专项使用静电喷塑设备

<p　class=“p0“　style=“MARGIN-TOP：　0pt;　MARGIN-BOTTOM：　0pt“><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>粉末静电喷涂的基本原理</span></span><span　style=“FONT-FAMILY：　“>PV-XwfI</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>工件通过输送链进入喷粉房的喷枪位置准备喷涂作业。静电发生器通过喷枪枪口的电较针向工件方向的空间释放高压静电</span><span　style=“FONT-FAMILY：　Arial“>(</span><span　style=“FONT-FAMILY：　宋体“>负较</span><span　style=“FONT-FAMILY：　Arial“>)</span><span　style=“FONT-FAMILY：　宋体“>，该高压静电使从．喷枪口喷出的粉末和压缩空气的混合物以及电较周围空气电离</span><span　style=“FONT-FAMILY：　Arial“>(</span><span　style=“FONT-FAMILY：　宋体“>带负电荷</span><span　style=“FONT-FAMILY：　Arial“>)</span><span　style=“FONT-FAMILY：　宋体“>。工件经过挂具通过输送链接地</span><span　style=“FONT-FAMILY：　Arial“>(</span><span　style=“FONT-FAMILY：　宋体“>接地较</span><span　style=“FONT-FAMILY：　Arial“>)</span><span　style=“FONT-FAMILY：　宋体“>，这样就在喷枪和工件之间形成一个电场占粉末在电场力和压缩空气压力的双重推动下到达工件表面，依靠静电吸引在工件表面形成一层均匀的涂层。</span></span><span　style=“FONT-FAMILY：　“>>5^=</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“>1.2.2<span　style=“FONT-FAMILY：　宋体“>粉末静电喷涂的基本原料</span></span><span　style=“FONT-FAMILY：　“>/~6t]$b’</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>用室内型环氧聚酯粉末涂料。它的主要成分是环氧树脂、聚酯树脂、固化剂、颜料、填料、各种助剂</span><span　style=“FONT-FAMILY：　Arial“>(</span><span　style=“FONT-FAMILY：　宋体“>例如流平剂、防潮剂、边角改性剂等</span><span　style=“FONT-FAMILY：　Arial“>).</span><span　style=“FONT-FAMILY：　宋体“>粉末加热固化后在工件表面形成所需涂层。辅助材料是压缩空气，要求清洁干燥、无油无水</span><span　style=“FONT-FAMILY：　Arial“>[</span><span　style=“FONT-FAMILY：　宋体“>含水量小于</span><span　style=“FONT-FAMILY：　Arial“>1.3g/m3</span><span　style=“FONT-FAMILY：　宋体“>、含油量小于</span><span　style=“FONT-FAMILY：　Arial“>1.0×10-5</span><span　style=“FONT-FAMILY：　宋体“>％</span><span　style=“FONT-FAMILY：　Arial“>(</span><span　style=“FONT-FAMILY：　宋体“>质量分数</span><span　style=“FONT-FAMILY：　Arial“>)]</span></span><span　style=“FONT-FAMILY：　“>C.BeaXTm</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“>1.2.3<span　style=“FONT-FAMILY：　宋体“>粉末静电喷涂的施工工艺</span></span><span　style=“FONT-FAMILY：　“>d{1{)</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>静电高压</span><span　style=“FONT-FAMILY：　Arial“>60-90kV</span><span　style=“FONT-FAMILY：　宋体“>。电压过高容易造成粉末反弹和边缘麻点；电压过低上粉率低。</span></span><span　style=“FONT-FAMILY：　“>FoTy=Bpf</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>静电电流</span><span　style=“FONT-FAMILY：　Arial“>10</span><span　style=“FONT-FAMILY：　宋体“>～</span><span　style=“FONT-FAMILY：　Arial“>20μA</span><span　style=“FONT-FAMILY：　宋体“>。电流过高容易产生放电击穿粉末涂层；电流过低上粉率低</span></span><span　style=“FONT-FAMILY：　“>%f{SM[jw</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>流速压力</span><span　style=“FONT-FAMILY：　Arial“>0.30-0.55MPa.</span><span　style=“FONT-FAMILY：　宋体“>流速压力越．高则粉末的沉积速度越快，有利于快速获得预定厚度的涂层，但过高就会增加粉末用量和喷枪的磨损速度。</span></span><span　style=“FONT-FAMILY：　“>]envcaS</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>雾化压力</span><span　style=“FONT-FAMILY：　Arial“>0.30</span><span　style=“FONT-FAMILY：　宋体“>～</span><span　style=“FONT-FAMILY：　Arial“>0.45MPa</span><span　style=“FONT-FAMILY：　宋体“>。适当加大雾化压力能够保持粉末涂层的厚度均匀，但过高会使送粉部件快速磨损。适当降低雾化压力能够提高粉末的覆盖能力，但过低容易使送粉部件堵塞。</span></span><span　style=“FONT-FAMILY：　“>&OV@DHG</span><span　style=“FONT-FAMILY：　“><br　/></span><span　style=“FONT-FAMILY：　“><span　style=“FONT-FAMILY：　宋体“>清枪压力</span><span　style=“FONT-FAMILY：　Arial“>0.5MPa</span><span　style=“FONT-FAMILY：　宋体“>。清枪压力过高会加速枪头磨损，过低容易造成枪头堵塞。</span></span><span　style=“FONT-FAMILY：　“>wI@6uDh/</span><span　style=“FONT-FAMILY：　“><br　/></span></p>
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