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Are you struggling to extrude pharmaceutical or chemical materials below 1mm diameter?

A useful technique when extruding small diameter pharma or chemical materials
A useful technique when extruding small diameter pharma or chemical materials

Are you struggling to extrude pharmaceutical or chemical materials below 1mm diameter?

• Are you experiencing;
• Unwanted back pressure?
• Extrusion chamber clogging?
• Die plate blockage?
• Nothing coming through the holes?
• Too much heat generation?

If the answer is yes to any or all of the above, my technique should help you.  Now these problems occur generally when the raw materials get too hot behind the face of the die plate as it travels through the extrusion chamber. This can lead to blockage and the raw materials become hot and solid. Not at all what you need for a successful ‘spaghetti’!

Why not try to mill your raw materials first to reduce the particle sizes or perhaps add a helpful additive such as Polyvinylpyrrolidone.  While this will help, the best advice I can offer is patience! Something I know not all of us has very much of!

Set your extruder to medium to fast speed and add very small micrograms until you see the material breach the face of the die. This can take some time……

Using our Caleva Multi Lab, it can take up to 5 minutes to travel the approx. 60mm journey. So if you are using a production scale extruder, this can take quite a while..

Once the die is breached increase the feeding speed dramatically to cope with demand. You will find, as long as you keep enough product moving, that you should not experience any of the above issues.

For further advice or assistance, please get in touch.  aaron.quinn@caleva.com

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