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Old April 6th, 2018, 03:52 AM   #1
theripley
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OT: Machine

Hi all.

Do you know any machine that can take out the molded transparent plastic without scratching the black one?

The transparent plastic is known to be grilamid.

Any idea will be greatly appreciated. Thanks.
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Old April 6th, 2018, 04:43 AM   #2
CommissioningMan
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Seems more like the black plastic needs to be taken out of the Grilamid mold?
Are either of them flexible? Otherwise I don't see how you can remove either one, without damaging at least one part.

If you need to fixate the black tube, you could insert something like an inflatable tube into the black tube?
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Old April 6th, 2018, 05:18 AM   #3
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How about making a fixture for an arbor press that holds the clear plastic with the black tube pointed up, securely holding the bottom of the clear part.

Then make a head for the arbor press that fits inside the black tube to hold it so it does not deform and a flange presses on the top of the tube and pushes the black part out of the clear part.
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Old April 6th, 2018, 05:59 AM   #4
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Before thinking about a machine to do the job, how do you do it manually? If you can't figure a way to do it manually then you will never get a machine to it.

Air pressure doesn't tend to scratch things but can be a bit weak, water pressure can move mountains.
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Old April 9th, 2018, 07:36 PM   #5
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Quote:
Originally Posted by BryanG View Post
Before thinking about a machine to do the job, how do you do it manually? If you can't figure a way to do it manually then you will never get a machine to it.
According to them, they do it through machining. However, they are complaining of damages on the black.
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Old April 10th, 2018, 02:19 AM   #6
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So as I said, can you 'blow' them out, air won't scratch. The clear plastic has grooves that would be easy to grip and hold a seal against the end.
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Old April 10th, 2018, 02:54 AM   #7
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Sorry for using this thread for something not related. But I am sick and tired of searching this homepage for a button or link with which I create a new posts. I already now how to reply to other posts. I have spent ten minutes now finding practically anything BUT that funciton.
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Old April 10th, 2018, 03:16 AM   #8
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Quote:
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Sorry for using this thread for something not related. But I am sick and tired of searching this homepage for a button or link with which I create a new posts. I already now how to reply to other posts. I have spent ten minutes now finding practically anything BUT that funciton.
Upper left. "Start a new thread".
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Old April 10th, 2018, 03:41 AM   #9
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Quote:
Originally Posted by BryanG View Post
So as I said, can you 'blow' them out, air won't scratch. The clear plastic has grooves that would be easy to grip and hold a seal against the end.
Grimalid cannot be blown out, it is non-flexible.

We are trying a cutter this time. I will keep y'all posted.
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Old April 10th, 2018, 05:24 AM   #10
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Is the transparent part brittle?
If so one might try 'scoring' the transparent part around the 'elbow'
then crack it apart and separate it.
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Old April 10th, 2018, 07:15 AM   #11
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Liquid Nitrogen and a careful tap of a hammer?
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Old April 10th, 2018, 11:09 AM   #12
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inner part don't look special. Isn't it available without clear outer part?
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Old April 11th, 2018, 02:15 AM   #13
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The obvious question isn't 'how to get the part out', it is 'why manufacture it like that in the first place?' Putting that much effort and material in to making something that you are just going to throw away is wasteful and bad for the environment. They really need to look earlier in the production process and find a better way.
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Old April 14th, 2018, 07:06 PM   #14
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a very simple tube is enough, just buy it, or call the company that makes it as it is out of two parts fabricated.
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Old April 15th, 2018, 08:44 PM   #15
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During re-processing, they only need the black part. I think the black part is more expensive to produce that is why they wanted to re-process it.

As for the liquid nitrogen, it is worth a try. I will buy a liquid nitrogen & see if it will not affect the black.

By the way, I am attaching pictures after we use cutter in trying to separate the two. It makes major scratches, which is definitely not acceptable
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