SU904797A1

SU904797A1 - Electrostatic powder sprayer

Info

Publication number: SU904797A1
Application number: SU792837601A
Authority: SU
Inventors: Валерий Евгеньевич Прядилов; Владимир Емельянович Дубенчак; Георгий Владимирович Ксенофонтов; Сергей Николаевич Левченков
Original assignee: Новосибирский Институт Инженеров Железнодорожного Транспорта
Priority date: 1979-11-11
Filing date: 1979-11-11
Publication date: 1982-02-15

Description

1one

Изобретение относитс к те хнике нанесени защитных полимерных покры тий в электростатическом поле и может быть использовано дл нанесени покрытий на издели различной формы и размеров.The invention relates to a technique for applying protective polymer coatings in an electrostatic field and can be used to apply coatings on products of various shapes and sizes.

Известен электростатический распылитель порошков, содержащий бункер дл порошка и коронирующий электрод, смонтированный на пластине из диэлег ктрического материала D3.An electrostatic powder sprayer is known, which contains a powder bin and a discharge electrode mounted on a plate of dielectric material D3.

Недостатком известного устройства вл етс то, что с его помощью не удаетс достичь полной зар дки порошка , так как мелкодисперсные фракции с размером частиц менее 20 мкм, не способные -к зар дке в поле коронного разр да, остаютс не зар женными и оседают на электродах, вызыва залипание их, что снижает степень зар дки порошка.A disadvantage of the known device is that it does not achieve full charge of the powder, since the fine fractions with a particle size of less than 20 µm, which are not capable of charging in a corona field, remain uncharged and are deposited on the electrodes. , causing them to stick, which reduces the degree of powder charging.

Цель изобретени - повышение производительности процесса и расширение функциональных возможностей распылител .The purpose of the invention is to increase the productivity of the process and expand the functionality of the sprayer.

Поставленна цель достигаетс тем, что электростатический распылитель порошков, содержащий бункер дл порошка и коронирующий электрод, смонтированный на пластине из диэлектрического материала, снабжен электропроводной пластиной, установленной в бункере с возможностью колебатель- . ных перемещений, проход щей с зазором через era выпускное отверстие и образующий с коронирующим электродом и покрывае шм изделием зону ионизации .This goal is achieved by the fact that an electrostatic powder sprayer containing a powder bin and a discharge electrode mounted on a plate made of a dielectric material is provided with an electrically conductive plate mounted in the bin with the possibility of oscillator-. displacements passing through the era through the era with an outlet and forming an ionization zone with a corona-forming electrode and cover with an article.

На чертеже представлен предлагаемый распылитель.The drawing shows the proposed spray.

Claims

The sprayer consists of a hopper I for powder with a plate 2 installed in it, made of electrically conductive material, passing with a gap through the outlet of the hopper 1 and connected to the working body 3 of the vibrator, the discharge electrode 5f located under the hopper T7 Bunker 1, vibrator i, corona the electrode 5 is mounted on a strip 6 of dielectric material of the handle 7 of the atomizer. The sprayer is supplied. A high voltage source 8 is applied to supply voltage to the corona electrode 5. Charges accumulate on the electrically conductive plate 2, thereby providing charging of the fine fractions of the powder by the contact method. The spray works as follows. Fine powder is poured into the hopper 1, the sprayed product is grounded to the electrode 5 and a voltage of 30-50 kV from a high voltage source is applied. Then, an on / off vibrator k is connected to which the plate 2 is connected. With the help of plate 2, a fluff from the hopper 1 is uniformly fed into the corona floor zone where powder is charged, a corona discharge zone (ionization zone) is formed between the deposited electrode 5 removable product and conductive plate

2. When a powder comes in contact with an electrically conductive plate, its fine fractions are charged (particle size less than 20 µm). A large amount of powder is charged in the ionization zone as it leaves the bunker. The charged porous flask moves to the sprayed product, settles on it in a dense layer, and when it is heated to 90 Г 4 products, a coating is formed on its surface. This sprayer design ensures that the powder is fully charged and almost all of the powder coming out of the hopper is deposited on the sprayed product, which improves the performance of the spraying process. In addition, it is possible to use no.-t / metering powders of different fractional composition in the spraying process, while increasing the utilization rate of the material. An Electrostatic Powder Diffuser, containing a powder hopper and a discharge electrode mounted on a dielectric material plate, characterized in that, in order to increase process performance and enhance the functionality of the spray gun, it is provided with an electrically conductive plate installed in the hopper with the possibility of oscillating displacements passing through the discharge opening with a gap and forming an ionization zone with the corona-forming electrode and covered it. Sources of information, ° taken into account in the examination 1. USSR author's certificate 319352, class 8 05 V 5/02, 19b9 (prototype).