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A pickling and phosphating method for a cast iron box of an LED display

A LED display, pickling and phosphating technology, applied in the direction of pressure inorganic powder coating, equipment, metal material coating technology, etc., can solve the problems of poor electromagnetic shielding effect, and the LED display box does not have electromagnetic shielding, etc. Achieve the effect of enhanced corrosion resistance, not easy to fade, and avoid radiation

Inactive Publication Date: 2017-01-11
青岛顺义森智能电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a pickling and phosphating method for the cast iron cabinet of the LED display screen, which solves the problem that the LED display cabinet does not have electromagnetic shielding or has poor electromagnetic shielding effect in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0052] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,

[0053] Surface treatment is used to remove surface dust, oil, burrs and rust;

[0054] Degreasing uses POH-11 degreasing agent, the pH value is 11, the temperature is 70 degrees, and the time is 8 minutes, which is used to remove surface animals, plants and mineral oil;

[0055] 5% dilute hydrochloric acid is used for pickling, and the pickling time is 5 minutes, which is used to change the properties of the surface o...

specific Embodiment 2

[0060] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,

[0061] Surface treatment is used to remove surface dust, oil, burrs and rust;

[0062] Degreasing uses POH-11 degreasing agent, the pH value is 13, the temperature is 60 degrees, and the time is 12 minutes, which is used to remove surface animals, plants and mineral oil;

[0063] 10% dilute hydrochloric acid is used for pickling, and the pickling time is 2 minutes, which is used to change the properties of the surface...

specific Embodiment 3

[0068] A pickling and phosphating method for a cast iron box of an LED display, which sequentially includes surface treatment, degreasing, first water washing, pickling, second water washing, surface adjustment, third water washing, phosphating, and fourth water washing , hot water washing, dehydration process, after the first water washing, it also includes the process of spraying aluminum powder layer, setting grounding solder joints on the aluminum powder layer, setting a protective layer on the grounding solder joints, and sandblasting the surface, wherein,

[0069] Surface treatment is used to remove surface dust, oil, burrs and rust;

[0070]Degreasing uses POH-11 degreasing agent, the pH value is 12, the temperature is 65 degrees, and the time is 10 minutes, which is used to remove surface animals, plants and mineral oil;

[0071] 8% dilute hydrochloric acid is used for pickling, and the pickling time is 3 minutes, which is used to change the properties of the surface o...

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PUM

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Abstract

The invention discloses a pickling and phosphating method of a light-emitting diode (LED) display screen cast iron box body. The method sequentially comprises the steps of surface treatment, degreasing, washing for the first time, pickling, washing for the second time, surface conditioning, washing for the third time, phosphating, washing for the fourth time, washing by hot water, and dewatering; after washing for the first time, the method also sequentially comprises the steps of spraying an aluminite powder layer, arranging a grounded welding spot on the aluminite powder layer, arranging a protection layer on the grounded welding spot, and sandblasting the surface. The aluminite powder layer is additionally arranged, and the grounded point is arranged on the aluminite powder layer, so that the box body can be effectively grounded, and has a good electromagnetic shielding effect, and radiation is avoided.

Description

technical field [0001] The invention belongs to the field of LED display screens, and in particular relates to a pickling and phosphating method for a cast iron box of an LED display screen. Background technique [0002] At present, the design of the LED display frame structure is determined by the installation requirements of the display screen, the size of the display area and the color of the surrounding environment. On the premise of ensuring sufficient installation strength, the installation weight of the display screen should be reduced as much as possible. [0003] There are usually three methods for the outer frame of the indoor display screen: black aluminum alloy, aluminum alloy outsourcing stainless steel (matte, bright) and gold integration. [0004] The black aluminum alloy frame has a simple structure, and the color of the frame is close to the background color of the display screen. [0005] Aluminum alloy outsourcing stainless steel frame, brushed stainless ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F9/33C23G1/00C23G1/08C23C22/12C23C24/02C23F17/00
CPCC23C22/12C23C24/04C23F17/00G09F9/33
Inventor 沈智广
Owner 青岛顺义森智能电子科技有限公司
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