How To Carryout The Best Purging Of Injection Moulding Machine Using A Purging Material

We share a few tips that will help to have the best use of purging material for injection moulding machines.

Before we start sharing the tips for effectively purging the injection moulding machine, it is good to share that a few categories of purging material are available in the market. You need to buy one in which your product fits and is ideal for your cleaning method. There are broadly two types of such purging compounds one is the mechanical type and the other chemical type. The tips we share can have universal use irrespective of the purging compound you buy.

The crucial tips to follow while purging injection moulding machines

If you are using purging material for injection moulding machines, it is necessary to follow the essential tips that we share now.

It is wise to use maximum safe screw speed when purging or removing the compound. Secondly, it is ideal to use maximum safe back pressure when using the purging materials. Finally, it is also perfect for maintaining the screw at a completely forward position while utilising the purging material.

If you use high screw speed and backpressure, it would be possible to ensure more increased agitation, which will ensure that the purging compound’s cleaning capability has an enhancement. On the other hand, if you maintain the screw in a forward position, it will ensure that the agitation of the screw and that of the purging compound stays centred on the machine’s front end. This is the region where colour and carbon deposits cause problems.

The next steps to follow

Along with following the above crucial tips, you must follow the following steps.

Nozzle cleaning

After completing the general purging actions for cleaning the screw and barrel, it is wise to charge the machine with a small amount of purging compound and perform short, intense-velocity injection shots. This act pushes the purging material into those tight areas and dead spots where it would not have reached usually. It will help to purge those areas, too. You must have noticed that mixing nozzles are areas where colour and degraded material hang up; this method of purging will allow you to clean those areas.

Shutdowns

You must be performing regular and preventative-maintenance purging. We recommend using a heat-stable purging compound before temporary or lengthy shutdowns and sealing. When the machine is not functional, air and oxygen in the barrel can cause the residual polymer to degrade and carbonise. This will lead to delayed startups, and you will face the disadvantages of machine downtime and scrap. However, heat-stable purging compounds will not degrade. Moreover, it will develop an “airtight” environment in the barrel and will also help future cleaning during the shutdown.

About the author

If you buy purging material from UNICLEANPLUS and follow the above tips, you can ensure the best purging. Call them at +91 9021232809 to place your order.