EVS-EN 1114-1:1999

In respect of the hazards listed in 4.1 and dealt with in 5, this standard specifies the safety requirements for the design and construction of the following kinds of screw type extruders for plastics and rubber:   - single screw extruders - twin screw extruders - multi/multiple screw extruders - hot feed extruders - cold feed extruders - vacuum extruders - pin extruders  The standard additionally covers the following feeding systems:  - hoppers - single roller feeding systems - double roller feeding systems - crammer feeding systems  and the following ancillary equipment which form part of or are attached to the extruder:  - screen changers - melt/gear pumps - melt ducts - static mixers - degassing equipment - shear head devices - extruder head  This standard only applies to extruder heads that give initial shape to the plasticised material.  This standards does not apply to extruders without screws e.g.:  - piston extruders - disc extruders - roller extruders  This standard applies primarily to machines which are manufactured after the date of approval of this European Standard.