FAQ for Experts. Answers by Experts.

39

Which processes are important for material conveying?

Material loader with adjustable fill level sensor (on the glass cylinder) and outlet flap with sensor

mo explains: what is important to consider for time or sensor conveying
The principle of suction conveying relies on the vacuum pump generating a vacuum that is great enough to range through the material feed lines and the material loaders to the material feed. …


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38

How do the various vacuum generators differ?

Central vacuum generation station with side channel blowers and safety filters in the background

mo briefly presents the most commonly used vacuum generators in the plastics industry

Part of the heavy workers of pneumatic suction conveying – the precise term for the most important conveying method in plastic processing – are without a doubt the vacuum generators. …


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37

How can abrasion be minimized for vacuum conveying systems?

Specially designed for abrasive material are material lines and bends made from stainless steel, borosilicate glass, or specially hardened stainless steel

mo explains abrasion and measures to prevent abrasion

The distances the material travels in the pipe lines from the material supply to the processing machines can be gruelling – both for the material as well as the material lines. …


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36

When is it necessary to purge material lines?

Controlled suction box

mo explains why purging can contribute to plant safety.

The point of purging is to remove or minimise transported material deposits from a material line. …


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35

What is important when choosing and installing pipe lines?

Curve diversity – gently curved glass bends combine stainless steel pipes to abstract looking technical structures with the goal of conveying granulate from the material source to the dryers and from there to the processing machines

mo describes the most important features of material feed lines

Through pipe lines and hoses from the material source to the processing machine – the distance that material has to cover during material processing can be vast for individual cases. …


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34

How can material distribution be automated?

Operating principle of a selection station with base plate (grey) and turntable (orange) with connection pipe. The material is conveyed from the material feed line (A) through the connection pipe to the machine (B).

mo explains fully automated material distribution systems

As well as the distribution systems with proportioning valves or manually operated coupling stations described in Issue 33, automated material changes can also be performed. …


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33

How can material be optimally distributed?

The Metromix proportioning valve (left) can also be retrofitted. After removing the transparent lid, it is easy to clean. Right, a coupling station with 6 inlets and 36 outlets

mo explains how material proportioning valves operate
Supplying a single processing machine with only one material is relatively simple. It becomes a little more complicated when regrind, as well as virgin material, should be supplied to the processing machine. …


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32

When is it necessary to purge material lines?

When conveying powder, filter and powder must be suited to each other, otherwise particles may permeate the filter or block the filter

mo explains why purging can contribute to plant safety

The point of purging is to remove or minimise transported material deposits from a material line. …


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31

How does the deducting of granulate work?

The material is dedusted while it is being conveyed in the material loader.

mo explains the dedusting units and implosion purging of filters

For the production of high quality parts, fine dedusting of the material may be required at the end of the conveying process, even if the material is virgin material. …


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30

What happens with the dust in the conveying system?

Filter: Central filter system with dust collection

mo explains explains security measures against dust contamination

Dust particles can cause a variety of problems in plastics processing, from quality loss and waste to problems during processing. …


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