Smarter Tools STPT-KIT-38PC Manuel d'utilisation et d'entretien télécharger pdf (Page 6)

Introduction

The spray gun is a vital link in any finishing application. In addition to operating

the spray gun properly, techniques of surface preparation and paint preparation

must be understood. These instructions will explain the differences among

various spray technologies and serve as a guide in the proper operation and

techniques of spray painting. Refer to the Replacement Parts Manual for model

specific information.

SPRAY GUN TERMS

Atomization - Conversion of bulk liquid to spray droplets (mist).

Bleeder – In this mode, air passes continuously through the gun whether

spraying or not. This mode is generally used when the air is supplied by a

continuously running compressor that does not have a tank.

Bleeder/Non-Bleeder – Indicates whether air flows through the gun continuously

or as the trigger is pulled.

External Mix – Process where the air and paint are mixed just after leaving the

nozzle. This type of mix should be used for fast drying paints and when a high

quality finish is needed.

Feed – Method used to bring paint into the gun for spraying.

Fluid Control Knob – Used to control the amount of paint being mixed with air.

Gravity Feed – Method of paint feed similar to the siphon feed method.

However, the cup is inverted to create a positive fluid pressure at the nozzle.

Internal Mix – Process where the air and paint are mixed inside the air cap just

before being sprayed. This method is best for heavy bodied, slow drying paints

and can only be used with the pressure feed method. Do not use fast drying

paints with internal mix. The paint will dry inside and quickly clog the air cap.

Mix – The mixing of paint and air when spraying.

Non-Bleeder – In this mode, air flows only when the trigger is pulled. This type of

operation is used with a compressor equipped with a tank or with a large factory

air system.

Paint Tank – An auxiliary pressurized paint reservoir that allows continuous

spraying of large amounts of paint with- out stopping for refills as with a canister.

It also allows using the spray gun at any angle without causing paint to drip.

Pattern Control Knob – Used to form the proper pattern (size and shape) of

paint as it is sprayed from the gun to the work-piece.

Pressure Feed – Method of paint feed where a canister or paint tank is

pressurized to force paint to the gun. Either internal or external mix air caps are

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Smarter Tools STPT-KIT-38PC Manuel d'utilisation et d'entretien Page 6