13 replies to this topic
Posted 16 October 2010 - 06:09 AM
I saw the video here vaccum forming but it seems very jumpy. Does anyone know of any written instructions on how to make and achieve the vacuum forming?
Posted 16 October 2010 - 10:09 PM
I looked up Vacuum Forming on YouTube to get info about it when I was looking into it. There are a couple of good ones there.
Would like to see some pics of the vacuum former that is in the TU video. Liked how that one was designed.
Posted 16 October 2010 - 11:58 PM
IMG00075-20100116-1724.jpg 73.53KB 235 downloads
Vacuformer minus vacuum (Shop vac works fine) Theres a 2" dia. hole in the back to plugin the hose.
IMG00078-20100116-1733.jpg 57.63KB 313 downloads
Platen to hold the PETG film
IMG00077-20100116-1733.jpg 70.62KB 350 downloads
Platen and heating element
IMG00085-20100116-1754.jpg 81.42KB 397 downloads
A finished pull
IMG00089-20100116-1832.jpg 75.28KB 331 downloads
Stencils ready for cutout
Lemme know if you have questions, I tried re-editing the video, but it was chopped up beyond edit due to it being broadcast live.
Maybe I'll find time to reshoot a little segment explaining its use when I can.
Thanks for the interest.
Posted 18 October 2010 - 12:48 PM
redg8r, Thanks for the pics.
What did you use to connect the platen to the metal poles allowing you to move the platen up and down?
Posted 18 October 2010 - 01:26 PM
Good pics, thanks Jerry.
What thickness PETG did you use?
Posted 18 October 2010 - 03:20 PM
Bulldog clamps, they're household spring loaded clamps used to hold mops & brooms up off the floor.
All parts are hardware store items, minus the heating element.
Some MDF, Pegboard, aluminum angle, metal conduit, etc;
A correction, I posted PETG, I think its PET.
Good question, I don't know the mil, but I'll throw a caliper on it for you, gimme a sec.
I've formed polystyrene up to .060 and 3/32. It should do 1/8 inch too (I know, your lovin the imperial measurements)
Posted 18 October 2010 - 03:52 PM
I can handle it. Thanks for the info.
I will have to get back to my vacuum former soon, it has been a while.
Posted 19 October 2010 - 04:03 PM
I did a search on the forum with no hits...but what else is involved with the vacuum forming process? What is used to glue the halves together? How are the hook holders attached...
also...what is more cost effective...vacuum forming a crankbait or pouring complete plastic?
Edited by andydoc, 19 October 2010 - 04:04 PM.
Posted 19 October 2010 - 05:50 PM
The vacuum former is to make stencils not for the actual construction of a bait just to clarify.
Posted 19 October 2010 - 05:59 PM
Vacuum forming is used mainly for creating shaped airbrush templates. It can also be used for making your own blister packaging and domed eyes. The process could be used for making bodies, but I don't know of anyone doing this.
You have outlined the problems: accurately trimming the body halves, fixing hook locations, restricting ballast movement and gluing the halves. all these problems do have solutions:
Trimming - an adjustable jig to hold the body and offer up to belt sander or disc sander. Bodies would still require manual scraping to remove melt swarf.
Hooks and ballast - probably the tidiest solution would be a molded resin frame. You would still have to create the wire harness.
Gluing - The body halves would be placed in a jig. The resin frame inserted with glue. Ballast weights (ball bearings) inserted. The halves fixed using the type of glue that melts/welds the two halves together. The resulting seam would have to be cleaned/sanded.
It is possible, but would require some clever jig design. But just the process of molding the internal frame, you could have molded the whole body, with wire hanger and ballast complete. Also to produce the bodies accurately and consistently, you would probably have to use a higher vacuum than a shopvac.
Posted 20 October 2010 - 05:46 AM
Where do you guys get your polystyrene from? I found some online at home depot (don't know about the stores yet). Home Depot
I also found a local source but don't know the price. What's the price I should be paying for a sheet?
Posted 20 October 2010 - 08:52 AM
I paid $18.50 (not including shipping) for a 4' x 8' sheet of .030" PETG. (high impact acrylic) I ordered it online from Regal Plastics in Dallas, Tx. Depending on where you are there are no doubt plastics suppliers in your area. Regal Plastics just happened to be the closest supplier to me that I found.
Posted 20 October 2010 - 10:58 PM
redg8r, would it be possible to get the dimensions of the vacuum box, the base it is sitting in and the platen?
Posted 04 November 2010 - 03:45 AM
Sure, but the dimensions are relative to the heating element I found.
The base is @ 16' square, the box is @ 12" square, 4" deep with a 2" hole for the vacuum hose.
The platen is @ 13' square to allow 1/2" overlap onto the box.
Hope it helps.