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Protection method of controller circuit board

A circuit board and controller technology, which is applied to the surface coating liquid device, coating, pretreatment surface, etc., can solve the problems of difficult promotion, complicated curing reaction process, high cost of adhesive production, etc. The effects of wide area, improved working environment for workers, good chemical stability and aging resistance

Inactive Publication Date: 2020-04-07
珠海格力绿色再生资源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, new protective methods developed on this basis, such as UV curing and moisture curing, can reduce the emission of organic solvents, but the production cost of adhesives is high, and the curing reaction process is complicated, so it is difficult to fully promote them at present.

Method used

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  • Protection method of controller circuit board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A protection method for a controller circuit board, comprising the steps of:

[0035] (1) The circuit board enters the gluing system under the drive of the assembly line crawler belt 310, and the gluing nozzle 210 sprays hot melt adhesive on the circuit board, wherein the hot melt adhesive is polyurethane hot melt adhesive, and the polyurethane hot melt adhesive is melted The glue tank 230 is melted into a glue liquid 240, and the glue liquid 240 enters the glue application nozzle 210 through the glue application pressurization motor 220. The glue application nozzle 210 is a flat fan-shaped nozzle, and the gap width of the glue application nozzle 210 is 1-500 μm , the length is 1-50mm, the size of the gluing nozzle 210 is adjusted according to the size of the circuit board, which can meet the gluing operation of different main board sizes and different film thickness requirements, the temperature of the sprayed polyurethane hot melt adhesive is 200 ℃, The nozzle 210 ado...

Embodiment 2

[0038] A protection method for a controller circuit board, comprising the steps of:

[0039] (1) The circuit board enters the gluing system driven by the assembly line crawler 310, and the gluing nozzle 210 sprays hot melt adhesive on the circuit board, wherein the hot melt adhesive is polyethylene hot melt adhesive, polyethylene hot melt adhesive Melt into the glue liquid 240 in the melting glue box 230, the glue liquid 240 enters the glue application nozzle 210 through the glue application pressurization motor 220, and the described glue application nozzle 210 is a flat fan nozzle, and the gap width of the glue application nozzle 210 is 1 -500μm, the length is 1-50mm, the size of the gluing nozzle 210 can be adjusted according to the size of the circuit board, which can meet the gluing operation of different board sizes and different film thickness requirements. The temperature of the sprayed polyethylene is 100 ℃, The nozzle 210 adopts an automatic control program, and can ...

Embodiment 3

[0042] A protection method for a controller circuit board, comprising the steps of:

[0043] (1) The circuit board enters the gluing system driven by the assembly line crawler belt 310, and the gluing nozzle 210 sprays hot melt adhesive on the circuit board, wherein the hot melt adhesive is polyamide hot melt adhesive, polyamide hot melt adhesive Melt into the glue liquid 240 in the melting glue box 230, the glue liquid 240 enters the glue application nozzle 210 through the glue application pressurization motor 220, and the described glue application nozzle 210 is a flat fan nozzle, and the gap width of the glue application nozzle 210 is 1 -500μm, the length is 1-50mm, the size of the gluing nozzle 210 is adjusted according to the size of the circuit board, which can meet the gluing operation of different board sizes and different film thickness requirements, and the temperature of the sprayed polyamide hot melt adhesive is 250 ℃ , the gluing nozzle 210 adopts an automatic contr...

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Abstract

The invention relates to a protection method for a controller circuit board, and the method comprises the following steps: a circuit board enters a gluing system under the drive of an assembly line crawler belt, and a gluing nozzle sprays a hot melt adhesive to the circuit board; and after the hot melt adhesive is sprayed, the circuit board enters a hot air leveling system, the hot melt adhesive is liquefied and leveled by adopting hot air, the circuit board is taken out of the gluing system and cooled, and a layer of protective film is formed on the surface of the circuit board. According tothe invention, the hot melt adhesive is used for the protective layer of the circuit board, has good chemical stability and aging resistance, is firmly combined with the circuit board, is sprayed intoa film shape by a hot melt adhesive machine after being heated and melted into a liquid state, is attached to the surface of the circuit board, and forms a good protective film for blocking the environment after being cooled and cured.

Description

technical field [0001] The invention belongs to the technical field of circuit board protection, and in particular relates to a method for protecting circuit boards of controllers. Background technique [0002] In the actual use environment of the controller circuit board, such as chemical environment (fuel, coolant), vibration, high dust, salt spray, humidity and high temperature, etc., the circuit board may have corrosion, softening, deformation, mildew and other problems, resulting in circuit board Board circuit failure. The traditional way to prevent the above-mentioned problems on the circuit board is to coat a layer of solvent-based conformal paint on the surface of the circuit board, with a thickness of about 25-50 microns, to isolate the environment and protect the circuit from damage. However, in this protection method, it takes a period of time for the colloid to solidify after painting. During this period, a large amount of organic solvents will be volatilized, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D1/02B05D3/04
CPCB05D1/02B05D3/0413B05D2507/00B05D2505/00B05D2508/00B05D2503/00
Inventor 李勉彭楚堂陈龙王琳周江郑婷婷
Owner 珠海格力绿色再生资源有限公司
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