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MAPP Plastics Discussion Forum

The MAPP Plastic Industry Discussion Forum allows members to rapidly communicate with each other. Post both questions and answers to questions that other MAPP members have about any industry topic from material and process issues to R&E Tax Credits and other business issues.

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Posted:  01 Jul 2008 15:25
We have a major initiative to reduce set-up times between production jobs. 

At current, we do not use purging compounds to aid cleaning our system and wanted to know if pulling the screw is still the best way to eliminate scap associated with material contamination?

Any input or help would be appreciated.

Matt Hlavin
Posted:  01 Jul 2008 15:32
Matt, if you go to the Members Section of the website and visit the Events Archives, you will see a recent webinar presentation that MAPP hosted on using purging compounds to improve set-up times and reduct scrap. 

After listening to this presentation, I found that nearly 80% of plastics processors in Japan use purging compounds to improve set-ups.  When comparing this to the 20% of the US molders that use the practice of either using compounds instead of virgin resins or pulling the screw, I felt that this is an area that all plastics processors need to investigate.

If you examine the fact that it takes between 2-4 hours to pull, clean, and reinsert a screw in a normal size machine, I would think the possiblity of reducing cost and improving capacity utilization would be significant for those who have yet to investigate the practice of using the right compound to clean your system.

I recommend you contacting Joe Serell at Asaclean - Sun Plastech Inc.

Troy Nix
Posted:  01 Jul 2008 16:31

We have been in contact with Asaclean this morning.  They have a couple of different samples on there way to Thogus today.  They are also sending us an instructional video that we can use as a training tool for our material handlers/process technicians for purging.   

We are following up with Asaclean in the next 2-3 weeks with a visit to Thogus to identify opportunities to reduce our machine down time due to excess screw pulls.

We are very excited about this opportunity!  Way to go MAPP for another cost saving solution.
Posted:  14 Jul 2008 20:51
I have not found any type of purging process that will get a barrel head and screw tip clean.     

Joe Witkiewicz
Posted:  16 Jul 2008 18:33
Hello Joe,
We are sorry that you haven't had successful experience with purging compounds. Most purging compounds come in different grades so sometimes it’s simply a question of finding the most appropriate grade for your application. Also, following the right purging procedures is very important.
We have many customers that use ASACLEAN Purging Compound to reduce machine downtime during material or color changeovers, as well as during machine shutdowns and startups. ASACLEAN has been proven to reduce scrap and reject waste as well as overall cost. 
We would be happy to send you a free sample to test.

Miyuki Matsumine
Posted:  14 Aug 2008 15:03
Matt,  Have you had any luck with the purging samples?  Did you find the instructional video helpful?  We have many of the same issues here at OPM, and would be interested in the outcome of your tests.

Joe Vereecken
Posted:  14 Aug 2008 23:02
Hello Joe,
We would be more than happy to have our rep contact you to set up a free sample of ASACLEAN as we are confident that we can help solve your purging needs.

Miyuki Matsumine
Posted:  14 Aug 2008 23:08
Joe, yes, we did find the sample and the video to be of great help.  In fact, we have now ordered our first load of the Asaclean compound as we are sold on its value to reduce our set-up times.

Call me if you have any questions!

Matt Hlavin
Posted:  18 Aug 2008 16:22
Does anyone have any experience with either Dyna-purge or Gator-purge?

Jeff Dorgelo
Posted:  18 Aug 2008 22:57
We have used Dyna-purge before but were not really happy with the results as it wasnot thorough enough for our liking.  I think that both Asaclean and CleanPlast CP-P are much better at cleaning out all remnants of the previous color and resin.  What we find best is that we can run these through our hot runner systems as well and further clean the system fully.

Dennis Kelley
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