Heating to press cylinder into elliptical shape?

I have a leluv flanged tube I would like to heat and mold into an elliptical shape.

Does anyone here have any experience with that?

My only concern is the flange inhibiting the pressing or the flange seperating from the tube. Im not sure if they just bond a flange on or if they truly roll the acrylic to create the flange.

Any help would be greatly appreciated

Was thinking of doing this myself next week (when the wife is out of the house at work). I would do it in the oven with constant pressure on the tube and go very slow in terms of heating, check every few minutes to ensure that it doesn’t completely warp out of shape. I would be prepared to completely ruin the tube. I have a generic pump from aliexpress. Would start at 160F and go up. If you can wait 8-10 days I will come back with a report of whether or not it worked.

On second thought another way to change the inner dimensions of a tube and make it more elliptical would be to fill one side of the tube with something to take up the volume, I.e. Barbecue skewers or chopsticks etc just put a bunch of them and tape them in place where you want them. Might be a lot easier than heating it up in an oven and risking toxic fumes etc.

I would be careful because by heating the cylinder you risk weakening the the composition of what makes it strong/ durable for high pressure. You can also risk causing micro cracks or uneven composition throughout the cylinder if the heating process is not distributing an even amount of heat allover the cylinder. This can result in you getting cut because of the cracks or if the pressure is enough it might cause the cylinder to shatter while you are using it and possibly cause moderate to severe lacerations.

If anything I say test it various times before you use it on yourself or just purchase the cylinder. I know they can be pricey but it’s better to be sure you are safe rather than risk hurting yourself just to save a couple of bucks. The other option is that you make a cylinder yourself using molds and everything.

Wouldn’t be better to buy an elliptical cylinder? After all, the shape would be perfect, mathematically, and probably suited with the material you’d like.

If there are any molded in stresses in the tube (and there almost certainly will be), then heating it enough to soften it will likely cause those stresses to relax, resulting in warpage or other changes you may not want. If it warps at the lip you may never get a good seal.

Thanks for the input guys. Yeah buying an elliptical would be the best option but I’m too broke to live with the decision to buy one now.

I also have a bathmate that I love so if I ruin the leluv tube trying to make an elliptical I’m not going to sweat it too much. I was planning to use a large pot of low simmering water and increase heat as needed to make acrylic malleable. I figure dipping in water would heat as uniformly as possible vs heating in the oven.

I will wait awhile and think about any additional input before I decide to attempt this and obviously will report back with my results

Boiling water won’t make it soft, but it will sterilize it. :)

You’re going to need to get to around 300°F. Maybe a heat gun?

The kitchen oven is not recommended. Read more:
Forming Cast & Extruded Acrylic Sheet | U.S. Plastic

I have an elliptical one from VacuTech, but I just tried to find the link and it looks like their site is down. But there are a number of companies that offer elliptical cylinders. I’ve been pumping for quite a while and was excited about the idea, but I haven’t found it works better than a cylindrical one.

Start 3/18 — 7.25 x 5.25. Now 8.1 x 6, Goal — 9 x 7

I’m pretty sure Leluv just glues the flange on their tubes. I have 4 of them and one looks VERY clearly like 2 pieces glued together.

I also own 2 Vacutech elliptical tubes and LOVE them. My cock is elliptical and I use the tube in the opposite orientation to concentrate force on the cavernosum instead of the spongiosum. The tube has altered my shape to a good degree and it also pushed me through a plateau.

But that Vacutech company recommends too big a tube on their sizing charts. Order one size smaller than they recommend. That’s why I have 2 ellipticals. One is huge. Wrong size.

I wouldn’t try what you’re thinking in the house. Fumes from plastics/acrylics can be toxic. Maybe a toaster oven or some infrared barbecue outside. But I’d bet you’ll just ruin a tube. Good luck. ( I think it was money well spent for my elliptical though)

I never thought of modifying an existing tube. I’m curious how it will work out. From what I know about plastics generally is that their ability to withstand deformation depends a lot on what kind of plastic it is since the bonds can produce mostly vertical polymers or a crosshatch amorphous or crystalline structure.

I see a lot of videos on youtube of people using acrylic resin to cast things, it doesn’t look too hard. You could probably use two diameters of PVC pipe that you compressed to shape using heat as the mold for the acrylic. I wouldn’t use PVC as a penis pump tube, it’s highly toxic as it decomposes and that would be accelerated by heat, friction, and who knows what else.

I don’t know though about DIY casting, in plastic fabrication the grain of the plastic sometimes matters a lot since it can determine the ability to resist forces differently from different angles, like how you can tear a plastic bag more easily from one direction than from another. If acrylic does have a grain to it, I don’t know how you would control that using a pour casting method unless maybe you had a seed piece of acrylic you could orient to control the grain.

I think a spiral shaped tube would be amazing since you could turn the tube to induce stretching around the penis equally. I don’t know what degree of curvature would be best for a tube like that, probably not a hard bend.

In the 1970’s or 1980’s they used to have tubes with a weak wall that would compress to an elliptical shape and allow you to do something like a jelq while inside the tube. No one seems to know anything about that today though, but it’s such an interesting idea I think I’ll eventually try making one.

I make my own pump cylinders. Every quality penis pump cylinder is made of two pieces (the tube and end cap) that are glued together. There’s a wide variety of online sources for cast and extruded acrylic tubing. Most suppliers have a minimum length purchase. McMaster Carr carries a large variety of sizes and you can purchase a minimum of 1’ft.

As for deforming a piece of acrylic tubing into an elliptical shape… it can be done. A heat gun and some patience.

I seriously doubt that you will be able to change the shape of the flanged base. Also be aware that the 0 ring in the connector may not survive the heat.

Well, I hope anyone trying this would remove the connector. That is the weak link as far as heating goes.