conveying

FAQ for Experts. Answers by Experts.

49

How can material stress be reduced during conveying?

The image illustrates the concept of the control: For a smaller material feedline (ø=45 mm) a reduced blower speed (here: 38 Hz) is sufficient; respectively, an increased blower speed is needed for larger feedline

mo explains how material can be conveyed gently
In issues 35 and 37 we described some different forms of abrasion and signs of wear, as well as listed some possible precautions to reduce wear and abrasion. …


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48

What is a diaphragm valve?

In order to convey material, a solenoid valve (above centre) creates a connection via a hose to the conveying vacuum. This sucks in the diaphragm and opens the valve closure (in green). The vacuum can now reach the material loader (blue arrows) and sucks up the material. If the container is full, the solenoid valve receives another impulse which closes the diaphragm valve.

mo explains the benefits and the mode of operation of diaphragm valves

When manufacturing medical products, parts with delicate surfaces or electrical components, a completely clean production environment is a basic prerequisite. …


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47

How does the material get from the storage bin into the conveying material feedline?

Variation of material feeding: suction box with two suction points (left), controlled suction box (right)

mo describes different types of material feeding

The way the material to be conveyed is fed into a material feedline depends heavily on the type of material and the conveying principle. …


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46

How can coupling stations be monitored?

Monitored coupling table with RFID-technology - the hose couplings and the lids of the coupling holders at the coupling table are each fitted with a transponder, the read-write sensors are installed into the casing of the coupling holders

mo describes different concepts for a source-destination mapping

In issue 28 we introduced different multipoint conveying systems, including machine-related conveying systems, which are connected to the different material sources via coupling stations (or tables). …


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45

How can disturbances in the vacuum supply be avoided?

A standby pump replaces the line pump in case of disturbance or servicing

mo explains measures to maintain the vacuum

Disturbances in a conveying system can lead to expensive production downtimes. Regular maintenance of the system can help prevent disturbances. …


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41

How can noise emissions during material handling be reduced?

„Pipe within a pipe system“; the inner pipe is used as the material feed line, the air-filled space in-between the pipes reduces noise emissions and prevents pre-warmed, dried material from cooling

mo explains: methods for quiet conveying

The noise levels during plastic processing are caused by many different sources. In regards to material handling there are two main sources of noise: …


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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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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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