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Guyson ESD Blast Cabinet for Selective Conformal Coating Removal

11-11-2020 01:25 PM CET | Industry, Real Estate & Construction

Press release from: Guyson International Ltd

Guyson ESD Blast Cabinet for Selective Conformal Coating

Guyson International, the UK’s foremost industrial finishing equipment manufacturer, has recently installed a specialised version of its Formula 1400 blast cabinet into an aeronautical defence manufacturer, for the selective removal of conformal coating from printed circuit boards (PCBs).

If during testing or usage a circuit board develops or registers a fault then instead of scrapping the entire board, which could incur very considerable costs, selective conformal coating removal is undertaken so that the damaged components can be replaced or reworking such as re-soldering can be undertaken.

This specialist Formula ESD version is based on the well-proven Guyson Formula 1400 blast cabinet which has been specifically adapted for this application and comes complete with a Guyson 21 twin bag dust collector. Blasting is provided by the stand-alone pressure fed Pencil Blast unit which is fitted onto an external shelf on the left-hand side of the cabinet. This unit is provided with a micro nozzle that propels the blast media, from the single blast pot, to selectively remove the conformal coating. Choice of blast media depends on the type of conformal coating and options include Walnut Shells, Sodium Bicarbonate, Plastic and Wheat Starch.

All blasting operations generate some level of static electricity and if this potential is not conducted away an electrostatic discharge (spark) can occur. Hence this Guyson Formula ESD version comes well equipped with preventative measures to enable safe blasting.

ESD specific features on the cabinet include an ionising air curtain, fitted to the inside back wall of the cabinet, this provides a high-speed laminar sheet of ionised air which washes down over the components and floods the chamber with ionised air for static neutralisation. An ergonomically designed handheld air-assisted ionising gun, for localised use, neutralises static charges and removes dust contamination on the individual boards. Additionally, extensive earth-grounding straps are fitted to all individual items of the entire blast system and finally, an earth grounding spike is used to protect each item to be blast abraded.

This specific Formula ESD version of blast cabinet is fitted with ultra-violet lighting. This is because some conformal coatings that are UV cured give an enhanced fluorescent response which makes the coating more visible under these ‘black lights’, so aiding operator accuracy when blasting.

If you would like to improve the safety and quality of your conformal coating removal, please contact Guyson’s Customer Service Department now to arrange free blast trials on your components, prove the process and make recommendations on the most suitable cabinet for you – call 01756 799911 or email info@guyson.co.uk

Snaygill Industrial Estate
Keighley Road
SKIPTON, North Yorkshire, England BD23 2QR

Guyson International Limited is a privately owned family company with a worldwide reputation for excellence in the design and manufacture of blast finishing, spray wash and ultrasonic cleaning equipment. Formed over 80 years ago, the company is registered to ISO 9001: 2015 and 18001:2007, and its head office is located at Skipton, North Yorkshire, in the north of England. Guyson has four international subsidiary companies: Guyson Corporation of the USA, located in Saratoga Springs, New York State; Guyson SA, situated near Paris, France; Guyson Sdn Bhd in Penang, Malaysia; and Guyson CN, in Wuxi, Jiangsu Province, China.

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