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Электростатическая окраска.
 Принцип метода и краткая
Principals/History
     история развития.
Доктор Аллен ДеВилбисс-
изобретатель окрасочного пистолета
                 • 1888 – изобретение
                   пневматического
                   распылителя (изначально
                   только для использования в
                   медицине) доктором
                   Алленом ДеВилбиссом
                   (доктор медицины).
                 • 1909 – первый
                   пневматический
                   краскораспылитель.
                 • 1923 – краскораспылитель
                   ДеВилбисса впервые
                   применен для окраски
                   автомобиля.
Первый распылитель ДеВилбисса

               • Первый пневматический
                 распылитель был
                 изготовлен доктором
                 ДеВилбиссом для
                 распыления гусиного
                 жира в ротовой полости
                 его пациентов
Развитие электростатической окраски

                 •   1936 – используя трансформатор от
                     рентгеноизлучателя, приобретенный
                     за 35$, Гаральд Рансбург построил
                     установку для электростатической
                     окраски алюминиевых шейкеров (т.н.
                     «Установка №1»)
                 •   1939 – заявление на получение
                     патента. Вторая мировая война
                     стала причиной дефицита меди.
                     Гильзы для снарядов начали делать
                     полностью стальными, и их
                     поверхность необходимо было
                     окрашивать. Это стало толчком к
                     развитию метода
                     электростатического окрашивания
                     Рансбурга.
Развитие электростатической окраски.
        „Установка №1“ Рансбурга

                    Каркас
                                      Высоковольтный
                                      трансформатор


Пневматические
краскораспылители



                       Ток высокого
                       напряжения
Ручной электростатический
краскораспылитель („Установка №2“)




                       Подача краски


                           Вращающийся диск
Каскадный принцип


                  Высоковольтный
                    выход (DC)

                      Диод


                      Конденсатор



  Трансформатор
  (AC)
Принцип электростатического
        нанесения
                                                    Заземленная деталь
                              Электростатическое
                              поле


                          Распылитель




    Источник напряжения
                                        Подача
                                        материала
                                        (краски)




                                           Заземление
Преимущества и
•Advantages/
      недостатки
  электростатической
 Disadvantages
        окраски
Краска концентрируется на гранях
Неравномерное распределение краски в
полузамкнутом контуре («эффект Фарадея»)
Линии электростатического поля

       Плоская поверхность              Поверхность с гранями




                        Поверхность с
                        углублениямии
Линии электростатического поля




       Однополярность   Разнополярность
«Оконная рамка»
        • Краска всегда оседает
          там, где деталь имеет
          наибольший
          электрический
          потенциал. Поэтому
          наибольшая
          концентрация краски
          происходит по
          периметру
          окрашиваемой детали
          («эффект оконной
          рамки»)
Перенос материала (%)
90

70

50

30

10
Окрашивание сейфа




Конвенциональный    Электростатический
краскораспылитель   краскораспылитель
                    Ransburg
Окрашивание
     металлоконструкций




Конвенциональный    Электростатический
краскораспылитель   краскораспылитель
                    Ransburg

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Electrostatic history