RE: VACUUM FORMING IDEAS  
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All Forums >> RC Airplanes >> Tips & Techniques >> RE: VACUUM FORMING IDEAS
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RE: VACUUM FORMING IDEAS - 3/20/2008 1:47:16 PM   
garyshy


 

Posts: 21
Joined: 12/10/2007
From: Livingston, TX, USA
Status: offline 		Cub Man, I also had that problem, there are three things that might be wrong, First, make your frame a little larger, there is not enough plastic to go around, Second, turn your pastic over before you put it on the buck. Third, if you can, heat the top of the buck a little just before you put the plastic on.I spent several several tries before I got mine correct. Hope this helps.

Gary

(in reply to Cub Man)
       Post #: 51

RE: VACUUM FORMING IDEAS - 3/22/2008 2:20:10 AM   
Larry S



Posts: 443
Joined: 3/3/2004
From: Manteno, IL, USA
Status: offline 		Well guys,
gave it a try again pulling a canopy. I made a table like the one at the beginning of this forum. Then I heated my plastic in the oven until it was just starting to sag, took if out and put it over the form, and presto, perfect canopy. I like it so much I decided to make another one. The second one I let sag a inch and darn if I didn't get folds in it so I tried a third time. Just as it started to sag, I took it out and it sucked down perfect. I was getting the plastic to hot and letting it sag to much. Thanks guys, without your help I be without a canopy for my Jemco Hellcat.
Larry

(in reply to Larry S)
       Post #: 52

RE: VACUUM FORMING IDEAS - 3/22/2008 2:38:18 AM   
N1EDM



Posts: 1861
Joined: 7/19/2002
From: Brockton, MA, USA
Status: offline 		Thanks for that info... I never would have thought about the material getting too hot... Thanks for the tip.

Bob

_____________________________

An expert is someone who has been doing it for 15 minutes longer than you.

(in reply to Larry S)
       Post #: 53

RE: VACUUM FORMING IDEAS - 3/22/2008 5:08:26 AM   
Steve Collins


 

Posts: 2116
Joined: 12/21/2001
From: St.Charles, MO, USA
Status: offline 		I have found that I get "folds" when I suck the plastic down too quickly. Years ago I bought a vacuum forming machine with an electric heater at the top of it. Since you just slide the hot material straight down onto the table, I let it sag 2 or 3 inches first.

_____________________________

Steve Collins

(in reply to N1EDM)
       Post #: 54

RE: VACUUM FORMING IDEAS - 3/22/2008 12:09:14 PM   
Larry S



Posts: 443
Joined: 3/3/2004
From: Manteno, IL, USA
Status: offline 		Steve,
I couldn't do that. Everytime I let it sag that much I get folds but again, I didn't have a heater like you said you have. Now another question for you guys, how heavy of a material can you form. What I used was .020. Could .040 be as easy to form?
Larry

(in reply to Steve Collins)
       Post #: 55

RE: VACUUM FORMING IDEAS - 3/22/2008 4:43:33 PM   
YAT-28E



Posts: 280
Joined: 4/30/2003
From: Columbus, OH, USA
Status: offline 		I have used the .040 with my homemade vac former with no problem

_____________________________

I have being doing so much, with so little for so long...that now I can do anything with nothing.....G. Ivory

(in reply to Larry S)
       Post #: 56

RE: VACUUM FORMING IDEAS - 3/22/2008 7:39:45 PM   
pub


 

Posts: 170
Joined: 12/9/2007
From: new brighton, PA, USA
Status: offline 		Do I understand this process right? Heat up the plastic till it sags, push it down on the mold until it reaches the the vacuum table and turn on the vacuum . How much of the thickness of the plastic do you loose on something that has height to it. And how do you get a good seal on the frame holding the plastic to the vacuum table? pub

(in reply to YAT-28E)
       Post #: 57

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All Forums >> RC Airplanes >> Tips & Techniques >> RE: VACUUM FORMING IDEAS
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