General Information on Wear and Tear

There are several eauses of wear and tear which include  

There are several ways to determine any mechanical wear and/or chemical corrosion. Mechanical wear can be seen by grooves and surface abrasion in one direction. Chemical corrosion can leave large and small holes in different areas and directions as well as surface deposits. To determine the wear of the screw and barrel consideration must be given to the original heat treatment method used. With nitride and Arbid methods the surface thickness can be measured. With bimetal outfitting the surface can be examined. Generally if the heat treated surface has worn down this signifies to the manufacturer that the units have worn out. 

There are ways to minimise wear and tear on the injection units by use of proper process parameter adjustment, the correct selection of barrel and screw for the job and suitable heat treatment outfitting (see hot combinations and applications) 

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