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Coating method and coating apparatus

A technology of spraying device and paint, applied in spraying device, spray discharge device, liquid spraying device, etc., can solve problems such as low spraying efficiency

Active Publication Date: 2013-03-06
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since the end of the coating pattern with a small coating amount is used for coating, there is a problem that the spraying efficiency is low.

Method used

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  • Coating method and coating apparatus
  • Coating method and coating apparatus
  • Coating method and coating apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0028] figure 1 It is a schematic configuration diagram of the coating device 10 of the first embodiment. Such as figure 1 As shown, the coating device 10 has at least a coating gun 12 constituting the main body of the device, and an air supply system 14 for supplying air for molding air 17 to the coating gun 12 .

[0029] The spray gun 12 has: a housing 16 (outer shell); an air motor 18 disposed in the housing 16; a hollow rotating shaft 20 rotated at high speed by the air motor 18; a pipe member 22 inserted in the hollow portion of the rotating shaft 20 ; a bell-shaped rotary atomizing head 24 provided on the front end of the rotary shaft 20 ;

[0030] The air motor 18 is configured to rotate the rotary shaft 20 at a high speed by supplying compressed air from a compressed air source not shown. The rotating shaft 20 is connected to a high voltage generator (not shown) that generates a high voltage. Therefore, a negative high voltage is applied to the rotary atomizing hea...

no. 2 approach

[0074] Figure 7 It is a schematic structural diagram of the spraying apparatus 10a of 2nd Embodiment. Figure 8A is along Figure 7 A cross-sectional view of line VIIIA-VIIIA in (however, illustration of the rotary atomizing head 24 is omitted). In addition, in the spray coating device 10a of the second embodiment, elements that exhibit the same or similar functions and effects as those of the spray coating device 10 of the first embodiment are assigned the same reference numerals, and detailed description thereof will be omitted.

[0075] In the coating gun 130 constituting the main body of the coating device 10 a, a plurality (three in the illustrated example) of annular flow path forming members 132 , 134 , and 136 are arranged between the casing 16 and the air motor 18 . Hereinafter, the flow path forming members 132 , 134 , and 136 are referred to as “first flow path forming member 132 ,” “second flow path forming member 134 ,” and “third flow path forming member 136 ,...

no. 3 approach

[0102] Figure 9 It is a schematic configuration diagram of the coating device 210 of the third embodiment. Such as Figure 9 As shown, the coating device 210 has at least a coating gun 212 constituting the main body of the device, and an air supply system 214 for supplying air for molding air 217 to the coating gun 212 .

[0103] The spray gun 212 has: a housing (housing) 216; an air motor 218 disposed in the housing 216; a hollow rotating shaft 220 rotated at high speed by the air motor 218; a pipe member 222 inserted in the hollow portion of the rotating shaft 220 ; a bell-shaped rotary atomizing head 224 provided on the front end of the rotary shaft 220 ;

[0104] The air motor 218 is configured to rotate the rotating shaft 220 at a high speed by supplying compressed air from a compressed air source (not shown). The rotating shaft 220 is connected to a high voltage generator (not shown) that generates a high voltage. Therefore, a negative high voltage is applied to the...

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Abstract

A coating apparatus has a rotary atomizing head that discharges paint to a work, and an air injecting unit that injects annular shaping air towards an outer peripheral edge portion of the rotary atomizing head. The air injecting unit has first air injecting ports and second air injecting ports. First air of relatively high wind speed is injected from the first air injecting ports and second air of relatively low wind speed is injected from the second air injecting ports.

Description

technical field [0001] The present invention relates to a spraying method and a spraying device for electrostatically spraying a liquid paint by spraying it from a rotary atomizing head. Background technique [0002] A rotary atomization type coating device is known as a coating device for coating the body of an automobile or the like. In this rotary atomizing coating device, a high voltage is applied to a rotary atomizing head to rotate it, and in this state, a conductive paint (liquid paint) is supplied to the rotary atomizing head. Thereby, the liquid paint is charged and atomized, and sprayed from the front edge of the rotary atomizing head to perform electrostatic spraying. [0003] In connection with the rotary atomization spraying device, it is disclosed in Japanese Patent JP-A-60-054754 that in order to eliminate the decrease in coating efficiency or the unevenness of the coating film thickness caused by the spray pattern based on the ring shape, and Air nozzles fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/06B05B5/04
CPCB05B17/00H05K999/99B05B5/0407B05D1/40B05B5/0426B05B3/1014B05B3/02
Inventor 重仓正树绪方浩平河部岳
Owner HONDA MOTOR CO LTD
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