Page 123 - UniorTools-Eng

A special procedure for the

manufacture of insulated tools

1. Cold forging of the socket: It involves a sequential technological process that
includes annealing, phosphating, and contracting.

2. CNC working of the socket: A special-purpose CNC machine is used to work
the socket into the required size according to the ISO standard.
3. Wrench marking: A special procedure is used to imprint an appropriate marking
on a wrench indicating the dimensions and material of the wrench.

4. Heat treatment: Annealing and tempering operations are used to give a
wrench an appropriate microstructure and optimum strength characteristics, thus
providing premium torque values and a long service life.

5. Sanding: In sanding, abrasive material is shot on product surface, making it
evenly coarse, while rendering it free of the oxides generated in heat treatment.
Sanded surfaces are evenly coarse and exact, thus providing excellent product
appearance and surface contrast on products that have certain surfaces
treated further.

6. Chroming: A socket is plated with a thin, but hard coating of chromium oxide

that protects against corrosion and other external in&uence. At the same time it
gives the socket a proper professional appearance.

Plastic coating process

7. Double plastic coating: The process of coating of tools in multiple layers of
plastic appropriate for work under high voltage conditions is a series of operations

with precisely de"ned parameters of implementation that must not deviate from
the requirements. This is the only way to obtain a quality and, most importantly,
safe product. Before plastic coating, the piece - the metal part of the tool - has to be
prepared for the process. It is degreased in a container of acetone and then dried. In

order for the material and the metal part of the tool to adhere together e!ectively
in the required places, the metal part of the tool is submerged in a special liquid
that activates its adhesive property. This is followed by mounting the piece on
special holders. The process of heating starts in a special chamber furnace and it is
then immediately submerged in an orange material. It has to be removed from this
material, which is heated to the right temperature, with the optimum speed so that

the material drips o!. Before the second plastic coating, the pieces are gelatinized in
a furnace at the prescribed temperature. This is followed by a second plastic coating

with a red material, the process of gelatinizing is repeated and the "nal plastic
coating, once again of the red material, gives the piece the "nal thickness of a two-

or three-layered coating. For the appropriate gloss and a professional appearance,
the pieces are stabilized in a furnace at the prescribed temperature.

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