1-4
Engineering Guide CDA3000
1 Analysis of task
1.2
Process analysis
irst find out what processing process
1
the drive solution is to be used
for. Apply the principles of process analysis, because process analy-
sis will provide you with a non-solution-specific view of the task at hand.
Do not perform a functional analysis at the beginning of an analysis,
because the functions used always describe the specific solution.
The functional analysis is derived from the value analysis. Its main role is
to eliminate dual functions and to cut the cost per function.
2
1.2.1 Example of a
process analysis
in comparison
with functional
analysis
Standard screw-type extruder
➢
An extruder is a machine which takes in solid to liquid (synthetic)
molding compounds and presses them out of an opening, for the
most part continuously.
It compresses, mixes, plasticizes and homogenizes the compound in
the process.
The screw-type extruder shown (see Figure 1.3) principally comprises a
drive unit and a plasticizer unit. The plasticizer unit consists of a screw
cylinder, a screw, a material funnel, and heating and cooling zones.
Figure 1.3 Schematic of an extruder
1. Processing process: Process in the course of which energy, information and/or material is transformed
and conveyed
2. The value analysis method was developed in 1948 by the Purchasing department of General Electric.
Literature: DIN 69910 and VDI 2801.
F
(1) Screw
(2) Cylinder
(3) Heater
(4) Funnel
(5) Gearing
(6) Motor
(1) (2) (3)
(4)
(5)
(6)
