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Sounds good. I already decided to just go through with gel coating anyways. Thanks!

Ah okay. But it'll work? The mould isn't meant to be super reusable. It's for a 3d printed mould that just has a defect from the actual printing process.

Hey, I am considering using Bondo filler for my composite work for the first time and I was wondering if I would absolutely need to apply gelcoat over it. I was wondering if I could just sand it and then apply mold release wax and PVA mold release to it. In my head since it's a polyester resin...

Yeah, I might do that. The thing is the mold is huge and extremely heavy. I'm going to attempt that though somehow.

I'll try heating the part. It's on the inside of the mold.

Something a friend brought up was the possibility that the mdf absorbed some moisture from the air and expanded a bit against the laminate. I'm not too sure how that would interact with laminate but it should somewhat have helped with removing the laminate but that depends on the actual amount...

Yeah I think so potentially. I tried to at first and had to use an adhesive that held it at the top but it was hard to remove from there but the bottom came out perfectly. I had to angle grind it out though, the upper region I mean. I'm going to attempt drilling holes in the bottom and pushing...

Yes to the first three questions. And the shape of the item makes it super hard to but i'm able to pop up a section. I am attempting to make a cone shape. It's pretty deep like two feet with a 'draft' angle of 11 degs

I believe I properly applied mold release on the mold. Gelcoat on the MDF and then 2 layers of release wax and 3 layers of PV. I have also used the mold before. Fiberglass. Wet-layup and then vacuum bagged. Cured at room temperature.

Hi, I have been trying to make a reasonably large composite piece and each time I have attempted it. The composite has gotten stuck to the mold. For reference, the first time I made it, I used spray adhesive and that was the main issue. This time, I didn't use it but the part still seems to be...

Ah okay. Sounds great. Thanks!

It would still be pushing. Would that still be okay?

Hi, I was wondering if it would be okay to mount a hydraulic cylinder being used for vertical compression loading with the piston pointing up instead of down.

@pierreick, I am currently in contact with the vendor but they take a while to respond. It's been a message from both our ends per day for the past few days which is very inefficient. We also don't have a process engineer. This is being used for composites work so it might be a different niche...

@LittleInch, I am unable to fix it right now because I need to replace the rotary vane and those aren't readily available where I live. It would also require purchasing a new spring and machining the carbon graphite piece. The carbon graphite piece also has a long lead time for delivery as...

Yeah, I definitely agree with you. It's a dual stage rotary vane vacuum pump that runs with oil. Its specs are 1/2 HP and 5 CFM.

Hey there, I have a dual stage vacuum pump which broke when I accidentally ran it dry since it spewed out all of its oil. I opened it up and found that one of the rotary vanes was broken. I was wondering if it would be okay to run the pump on one stage only and have the other parts without a...