Main Machine Assemblies; Extruder - Sacmi PMV 224 Maintenance And Operation Manual

176.12
.A03
2 MAIN FEATURES
2.1.1

MAIN MACHINE ASSEMBLIES

2.1.1.1

Extruder

This unit is used to melt the granular material and force it out of a suitably sized port at the required temperature. The
size of the outlet depends on the type of plastic compound being handled. The equipment on the drum cuts the extruded
material into pellets and places them in the caps.
The unit features a plasticization section consisting of a barrel (1), auger (2), a number of electric heating elements
(3) (located in 5 different zones) and four cooling fans (4). The unit is rigidly secured to a gearbox & thrust bearing unit
(5) and the drive unit (6) which rest on a slide (7) capable of moving backwards and forwards to allow for expansion
of the plasticization unit. When the mounting bolts, which secure it to the machine base are removed, the unit and
extruder can be moved sideways, making it easier to carry out maintenance.
The extrusion head (8) and nozzle (9), that the molten material flows out from, as well as the bypass valve (10), used
to discharge the material through an auxiliary outlet port, are located in the front part.
The mount (11) holds up the front part of the extruder. It is provided with a lock that secures the extruder to its base
after adjustments have been made.
The hopper (12), that feeds the granular material to the extruder, completes the unit.
FIGURE 2.1.1.1 - EXTRUDER
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8
11
1 Barrel
2 Auger
3 Electric heating elements
4 Fan
5 Gearbox
6 Drive unit
7 Slide
8 Extrusion head
9 Nozzle
10 Bypass valve
11 Front mount
12 Plastic compound hopper
2 - 2
Revision 01 Date 14.11.2001
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4
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3
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4
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12
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