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Operation of machine & accessories

7.21

Training manual • Basic training • Status 03.14

EOS P 396

Preparing plastic powder using the components of the IPCM P plus

Prepare refreshed powder using the mixing & qualification station

The plastic powder is dosed, mixed, conditioned and finally discharged using the

mixing & qualification station (MQS).

New powder from a new powder bin and recycled powder from a multibox are dosed

into the mixing bin via a switchable powder pump on the docking station for the

MQS. The MQS controller calculates the required dosing amounts and monitors the

process.

The mixing process comprises a combination of fluidisation and stirring. After the

stirring time has elapsed, a sample can be taken from the mixture and checked using

suitable methods, e.g. MVR measurement (Melt Volume Rate), outside the MQS. It is

possible to subsequently correct the mixture ratio without the need to discharge the

power mixture.

You will find the mixture ratio recommended by EOS for the plastic powder in the

application instructions for the related material.

Necessary activities for the preparation of the plastic powder:

➢ Set mixture parameters on the MQS controller:

- Transport new powder and recycled powder to the mixing bin

- Set type and quantity for the powder mixture

- Set mixture ratio

- Activate sampling if necessary

- Set quantity for the powder discharge

➢ Mix powder

➢ Transport refreshed powder to the machine.

A further EOS accessory for plastic powder preparation is the Sieving

machine P 3. You will find further information on this accessory in the

Components IPCM EOSINT P manual, section 10, Sieving machine P 3.

Risk of process problems!

Mixing the plastic powder may cause electrostatic charging. The plastic

powder can therefore not be used for the building process immediately,

instead it must be stored in the multibox for at least 24 hours after mixing.

Keep to the storage duration to dissipate the electrostatic charging of the

powder produced by mixing.

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Storage of the powder

EOS P 396 User Manual

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