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Rotary atomizer and coating pattern control method

A pattern and rotating head technology, applied in spray discharge devices, spray devices, liquid spray devices, etc., can solve problems such as paint loss, and achieve the effect of expanding diameter and strengthening centrifugal force

Active Publication Date: 2015-04-01
日本兰氏工业喷漆株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the invention of Patent Document 1 solves the problems when the flow velocity of the molding air is increased for metal spraying, while Patent Document 2 focuses on these problems: as when the diameter of the spray pattern is constant (such as when When a narrow area such as a car pillar is to be painted), excessive spraying leads to loss of paint, and Patent Document 2 proposes an improved idea for this situation

Method used

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  • Rotary atomizer and coating pattern control method
  • Rotary atomizer and coating pattern control method
  • Rotary atomizer and coating pattern control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1 ( Figure 1-5 ):

[0067] Look figure 1 , the depicted rotary electrostatic spraying apparatus includes a cup-shaped rotary head, ie, a bell cup 13 , which is rotated by an air motor installed in the apparatus body 11 , as in conventional apparatus. The paint is supplied to the center portion of the bell cup 13, and the paint moves radially outward along the inner surface of the bell cup 13, after which the paint is discharged from the peripheral edge 13a of the bell cup 13. As described above, in the drawings, L represents the rotation axis of the bell cup 13 , and the arrow A represents the rotation direction of the bell cup 13 .

[0068] The device has an air ring 14 located further behind the peripheral part of the bell cup 13 . figure 2 It is a front view of the bell cup 13 . Look figure 2 , two annular spaces, namely the first and second annular spaces 15 , 16 , are formed in the air ring 14 . Profile air holes 17 and control air holes 18 are t...

Embodiment 2

[0083] Example 2 ( Image 6 , 7 ):

[0084] Embodiment 2 is a modified example of the exemplary embodiment 1. In Exemplary Embodiment 1, the air ring 14, the forming air holes 17 and the control air holes 18 are shown in a common plane ( figure 1 ), the control air holes 18 are located radially further inside the molding air holes 17, but the end face of the air ring 14 may include a stepped face, and, as shown in the enlarged view Figure 7As shown, the peripheral portion 14a where the molding air hole 17 is placed may protrude further forward than the inner peripheral portion 14b where the control air hole 18 is placed, while the distance between the molding air hole 17 and the peripheral edge 13a of the bell cup 13 is shortened. The height (Δh) of the stepped portion between the outer peripheral portion 14a and the inner peripheral portion 14b of the air ring 14 is 2-3 mm. In other words, in the exemplary embodiment 2, the end at the opening of the molding air hole 1...

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PUM

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Abstract

A rotary electrostatic atomizer uses shaping air and pattern control air. Shaping airflow is supplied from shaping air holes aligned along outer one of concentric circles that are concentric with the rotation axis of the bell cup and located behind the front end of the bell cup. Pattern control airflow is supplied from pattern control air holes aligned along inner one of the concentric circles. Both the shaping air flow and the pattern control airflow are expelled in circumferentially twisted directions substantially with an equal twist angle opposite from the rotating direction of the bell cup. The shaping airflow passes a circular line near to and radially outwardly apart from the outer perimeter of the bell cup. The pattern control airflow intersects the shaping airflow from radially inside at the position near to and radially outwardly apart from the outer perimeter of the bell cup. Thereby, the pattern control airflow gives the shaping airflow a radially outward force to enhance the centrifugal force of the shaping air and enlarge the coating pattern regulated by the shaping airflow.

Description

technical field [0001] The invention relates to a rotary electrostatic spraying device and a spraying pattern control method. Background technique [0002] Electrostatic spraying technology involves electrically depositing atomized paint onto a part to be sprayed (workpiece) by means of electrostatic force, and a rotating electrostatic spraying device with a rotating head is known as a device for achieving such deposition, wherein, A typical example of a rotating head is a cup-shaped bell. Electrostatic spraying equipment of this type is used for powder coatings, insulating liquid coatings (eg, oil-based paints), and conductive liquid coatings (eg, metallic paints or water-based paints), among other rotary electrostatic spraying equipment known as this type. A high voltage is applied to the spinning head, and in this type of device, to an external electrode that is directed away from the spinning head in a radially outward direction. [0003] Rotary electrostatic spray equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05B5/04B05B7/08
CPCB05B7/0815B05B5/0407B05B5/0426
Inventor 三井三千雄谷隆次猪濑贞雄
Owner 日本兰氏工业喷漆株式会社