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To the mold and wipe it off

Ok, This problem is reasonably common with highly polished molds. They actually are too smooth to get all the air removed. My first move would be to go to the auto parts store and get a spray...

When I look through your setup, I am struck by how slowly you move air. A 10 gallon tank should work IF you have the hoses and mold bade with adequate flow potential. Your hole sizing in the platen...

This part isn't trapped. All you need to do is establish the proper plane to get it off the tool. Slide the part left and the undercut clears the tool then lift.. You get there by rotating the...

i see you posted this over at tk560.. look over there for answers.

Two answers. 1)) Yes it will work.... BUT It wont work as a practical matter. when you form plastic you stretch it, it gets thinner. By the time you get anywhere close to the bottom of your slot,...

I think whats happening is that you have a problem measuring the sheet temperature. Assuming you are measuring it with an infared temp gage, you
could very easily overtemp the sheet surface...

not someone I'm familliar with , sorry ..

Your mold is way too polished. The lack of smoothness in the plastic is in all probability caused by the plastic "shutting off" in local areas leaving a series of non connected bubbles. This makes...

You probably wont be able to hide the seams.. Everything you might use is harder than MDF. The real question is whether the Vac process is the one ot use. This almost sounds like you could make it...

MDF female molds are useful for short runs. trying to get life out of them is futile. If you need to run any kind of quantity of part, build real tools. MDF is made of a phenol formaldehyde glue...

pm sent..

youre a lot better off logging into tk560.com for the vac form discussions there.
this place is quite slow..

Well I dont see any holes to remove air from the cavity. Ideally this should have been a male mold with thte plastic being pulled down onto it. But since you are here, lets try to fix it.. How is...

Imagine window screens coated with 100 grit media. Its for sanding down drywall mud after you tape the wall. Drywall in the states is the gypsum boards with hard paper facing we use for interior...

VETTEL IS ON THE POLE IN BAHRAIN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Get some 100 grit drywall screens and LIGHTLY sand the roofs.
The issue is usually the fact that large smooth areas seal off ...

wave length.... It is usually referring to the IR part of the spectrum that the emitter transmits heat with. Usually has very little to do with forming, the plastic sees heat, the wavelength of the...

Female molds do not depend on sanding the tool surface to completely vent. You must properly port the tool to make that happen. Surface sanding is used only in cases where local areas of a tool...

I'm fairly certain you are getting smear off the tool. There are basically 2 possibilities here. 1) that it is removable with the proper plastic friendly solvent. 2) That there is a reaction...

I manufacture lexan windshields, Naptha removes marking inks very well, Methanol is good also. MEK and Acetone will destroy lexan really fast. the reason I said you might get away with it is that I...

absolutely wrong. never use something that melts below forming temp on any mold. You might get away with wiping the formed part with NAPTHA. This degreases most lexan smear problems. I also have...

I'd cruise over to the tk560.com forum and ask there.
while you do that, describe the tool, and the process temps.
Also what masking came on the part, cling film or acrylic glued
clear film. are...

Heres the deal....
If you are making helmet visors as a replacement for existing products in the field, you will have difficulty. Vacuum forming will not be the process of choice. Injection moldng...

You know, if the GRP parts are working, he can do it another way..
Use Sunrez UV resins and the existing tooling. Its simple to do.
Release coat the mold. Spraypaint the tool in lieu of gellcoat....

Ed..

A regulated gas oven would work fine. A non-regulated simple gas oven will not get it done... I'm just trying to save the guy some misery..

The first problem is controlling the radiant...

I thermoform for a living. Using a brick style gas oven is NOT the way to do it. If you wish to use gas, and I have, use infared gas panels. They are throttleable, robust and reasonably priced. ...

There are no programs that will generate shapes from 2d to 3d.
You need to construct he surfaces yourself. Look at the 3d programs such as Rhino or that sort of Stuff. Catia V5 is cool if you have...

I vac form for a living..
You will not be able to pull fast enough with a pump alone. Polycarb cools so fast that you cant wait for a pump to pull it down, you need a big valve and a storage tank,...

well so much for the others catching up.

I think this season is basically OVER!!

Imagine the fools at Honda, double thinking the team sale..
What morons. But in any case, Bravo Brawn..
I...

Any time Marty..

Oh Yeah Russ Brawn is GOD, did you see them smoke the field in Roo Land?
It's going to be a heck of a season.......

Scott.