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    Home > Coatings News > Paints and Coatings Market > Coating technology: Problems and treatment of wood door painting

    Coating technology: Problems and treatment of wood door painting

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: in the production and manufacturing process of wooden doors, if the paint is applied by spraying, there will inevitably be some inevitable technical defects, and what are the causes of these technical defects? What are the corresponding treatment methods? 1, flow hanging Causes: (1) uneven spraying pressure; (2) too close spraying distance; (3) unbalanced spraying speed and paint output; (4) too much spraying; (5) incorrect spraying angle; (6) too low spraying environment temperature; (7) large nozzle, high pressure and paint output Treatment methods: (1) control the spraying pressure; (2) control the distance at 15 & M Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: in the production and manufacturing process of wooden doors, if the paint is applied by spraying, it is inevitable to encounter some inevitable technical defects, and what are the causes of these technical defects? What are the corresponding treatment methods? 1 Causes of sagging: (1) uneven spraying pressure; (2) too close spraying distance; (3) unbalanced spraying speed and paint discharge; (4) too much spraying; (5) incorrect spraying angle; (6) too low spraying ambient temperature; (7) large nozzle, high pressure and paint discharge Treatment methods: (1) control the spraying pressure; (2) control the distance at 15-25cm; (3) adjust the spraying speed to keep the balance with the paint quantity; (4) control the spraying quantity; (5) maintain the vertical spraying; (6) improve the ambient temperature; (7) select the appropriate nozzle and pressure to control the paint quantity 2 Causes of bubbles: (1) filter system error of spraying machine; (2) too thick primary spraying; (3) too large pressure of spray gun, too far spraying distance; (4) too fast solvent evaporation Treatment methods: (1) check and repair the filter system; (2) control the spraying amount; (3) control the spraying pressure and distance; (4) add a proper amount of slow volatilizing flux 3 The causes of whitening are: (1) water is mixed in the coating; (2) water is mixed in the coating; (3) the wind speed in the spraying room is too large; (4) too much low boiling point solvent is added Treatment methods: (1) check the oil-water separator; (2) control the relative humidity in the spraying room; (3) control the wind speed at 50-80cm / S; (4) control the amount of low boiling solvent added 4 Causes of orange peel: (1) insufficient spraying pressure, poor paint atomization; (2) too far spraying distance; (3) too high paint viscosity, poor paint atomization; (4) too low paint temperature, poor leveling planning; (5) too fast or too slow spray gun movement; (6) nozzle wear, poor paint atomization; (7) improper selection of spray gun model Treatment methods: (1) increase the spraying pressure; (2) control the spraying distance; (3) adjust the viscosity of the coating; (4) increase the spraying temperature and improve the leveling; (5) correctly grasp the spraying speed; (6) replace the nozzle; (7) select the appropriate spray gun according to the coating performance 5 Causes of particles: (1) the spray gun moves too fast and spraying is uneven; (2) the spraying pressure is too low and the coating atomization is not good; (3) the nozzle aperture is small and the pressure is too large, the spraying distance is too long, and the paint liquid has not reached the surface and has gelled; (4) the spraying amount is too small, and no continuous coating film is formed (5) the filter system of the spraying machine fails; (6) there are dirt such as dust, wear debris and wood wool on the surface of the base material; (7) the used spray gun is not cleaned, and the coating particles are ejected Treatment methods: (1) control the spray gun moving speed, which should be 30-50cm / S; (2) adjust the spraying pressure; (3) spray correctly according to the operating procedures; (4) increase the spraying amount; (5) check and repair the filter system; (6) thoroughly clean and dust the substrate surface before spraying; (7) clean the spraying equipment in time after spraying Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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