Repair of cases of radio equipment. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Repair of cases of radio equipment. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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During operation, cracks, chips, holes and other damage often occur on the body of a radio receiver, player or other electronic device. In the vast majority of cases, equipment cases are made of thermoplastic - high-impact polystyrene or its modifications. The case is usually repaired by gluing and filling defects with epoxy compounds or various adhesives with fillers. Unfortunately, the restored surface area is often too visible.

Nevertheless, it is possible to eliminate a crack, a dent or a hole in a thermoplastic body without the use of scarce fillers and adhesives. The work is performed using an electric soldering iron and a thin - 0,05 ... 0,07 mm - fluoroplastic film. The through hole is covered from the inside with a piece of cardboard or another material more heat-resistant than polystyrene, filled with crumbs from the same plastic as the case. From above, the place to be repaired is covered with a fluoroplastic film and the tip of a hot soldering iron melts the crumb through it, melting the edges of the hole. Raising the film, crumbs are quickly added and melted again until a small but continuous monolithic bulge is formed in place of the hole.

After cooling, it is processed with a file, sandpaper, and then polished. The crumb to fill the hole is best cut off with wire cutters from the tides and ribs on the inside of the hull being repaired. In extreme cases, plastic scrap is used from other cases similar in material and color.

If "native" plastic was used for the repair, the temperature of the soldering iron was selected experimentally on a similar material and all the described operations were carefully performed, it is almost impossible to detect traces of the former hole.

Author: V.Milkin, Murmansk

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