Try some 20 sq pine for the frames. Half laps on the corners. Hold the sheet with small screws that are half screwed into one frame with the heads ground off to a point leaving spikes half from the bottom, half from the top. Drill blind relief holes for the spikes in the opposite frame half. Wing nut joiners at about 8" spacing and at corners. use more heat and have a heat gun ready to help bottom corners suction. Have the vaccum on when placing the frame and sheet. I've been there and done that.
You remind me of me😂, I’ve had many a desperate moment trying to do similar things, but your restrained response put me in awe, mine would definitely not be broadcastable 😂
LOL you had me chuckling. None of this is life or death! and its all fun. When it works its great when it doesn't everybody says I told you so, such is life. You really mustn't let it get to you. But I do utter the odd curse when the cameras are off, just knocked over a tub of 500 m4 nuts....... there were expletives.... ;)
Hi Septic , the first one (bubbles) is caused by moisture on the plastic. Put your pre cut sheetstock , in the airing cupboard , overnight We often leave a first pull ,on the plug , wet sand it with 1200 , voila, crystal clear !! Cheers mate Phil
Thanks Walter, in this case too much heat, the two you see in the closing shot were from the same batch, just not heated for so long. If you leave the protective film in place it's harder to judge the droop, and I over did the cooking! Slowly bringing the temp up should dry any moisture too.
Not sure about PTG but many vac forming plastics need a temperature in the range 140- 160 c to form easily. It is probably a good idea to warm your mould as well because the plastic in cont act with a cold mould chills remarkably quickly. It looks too that your frame holding the plastic needs re-designing to make it stiffer but even then I suspect withn the very small margin of plastic around the frame you will still have problems. Good luck but an excellent video
Thank you, results on the Web show 120 - 160 degrees. I reached 135. The plug was not cold. I think the protective film was limiting the stretch. The edges were really secure, I excerpted a great deal of force. I am still considering options
