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Injection machine pressure

This topic contains 4 replies, has 2 voices, and was last updated by  Anthony 4 months ago.

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Anthony anthonyvanv

Injection machine pressure

08/03/2020 at 04:38

Can someone look at a photo of my machine and let me know if my heat bands are spaced correctly? I feel like the plastic in the tip isn’t being liquified as good as the stuff in the middle of the tube. I’m setting the bottom two heaters to 290 and the top two to 270. Melting abs pellets.

oops disregard the one photo with three heat bands.

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starter
10/03/2020 at 04:13
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Thank you guys for the tips! Turns out I was just not waiting long enough for the plastic to heat up. Sorry. I’m new.

warrior
08/03/2020 at 20:00
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They should be near the heaters they control but the sensor tips should be on the thing you are trying to control the temperature of, in this case the tube and maybe the nozzle. Take a look at my description in the Dec 14 post in this thread https://davehakkens.nl/community/forums/topic/injection-molding-what-am-i-doing-wrong/#post-151288 . If you follow that approach, I would dremel a shallow dimple for the thermocouple tip to press press against. The laser should work but may not be precise enough at this temperature. A BBQ probe sensor could work as well.

starter
08/03/2020 at 14:17
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Aren’t they supposed to be attached to the heaters? Do you think a temperature laser would work?

warrior
08/03/2020 at 07:29
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It is hard to tell from the photo, but it looks like the thermocouples are attached to the heater bands. The tube may be cooler. Do you have a way to measure the tube temperature independently to check?

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