Using a filter housing like this https://www.ebay.com/itm/133123159218 of a reverse osmosis (RO) setup, pretty good results with a cheap vacuum pump like this https://www.ebay.com/itm/274433181883 can be achieved. */
I would imagine one of these would be more effective https://www.amazon.com/HFS-Brake-Bleeder-Vacuum-Tuner/dp/B00NP60URE and cheap enough. var myimages2=new Array()
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on Drying and Processing, Started by Burlkraft If you are purchasing a vacuum pump for resin infusion for the first time, it is best to invest in a model that has a standard pumping speed. //specify corresponding links below
This is possible only in vacuum pumps. Its made a huge difference, especially if I keep the silicone in the fridge for a while to give it time to settle down. */
resin) and a vacuum chamber for flexible materials (eg silicone molds). Over 200+ free JavaScripts here! If youre trying to get a perfectly clear finish, the last thing you want is a bunch of microscopic bubbles frozen in time. See this for a discussion: https://www.artmolds.com/pressure-pot-vacuum-chamber. :: recirculating water for a vacuum kiln vacuum pump, Question: switching vacuum pump from 3ph to 1ph, Location: Somewhere in the Apalachicola NF. The best way to prevent this is to put the parts in a vacuum chamber so all the air works its way out before the epoxy cures, but thats a considerable investment for a one-off project. Probably have to replace the lines that came with, I know the ones on mine were flattening at about 2/3 the scale. Resin infusion involves achieving maximum vapor and air removal into the bag or mold just before the infusion takes place. Updated: 00/04/25
Login with username, password and session length. Some resins warm up while setting (some an incredible amount) not sure how weird theyd go with this kind of temp change happening. - - This makes the pump leak-tight and easier to use. So I want a pressure pot? It is specifically designed to handle resin infusions. random_imglink()
You have to know your cure time with epoxy though so that it doesn't gel too quicky if you are degassing it. Lazada, Browse Alphabetically: Yes
Using a pressure cooker and the compressor from an old dorm fridge is pretty cheap and easy vacuum pressure tank. Indeed, Im wondering if its easier to build a pressure pot some how (I have no idea how!) Verified purchase: Ningbo Boyu Waterproof Material Co., Ltd. Anhui Tenglong Pump And Valve Manufacturing Co., Ltd. Guangzhou Bdlf Building Materials Co., Ltd. Beijing Long Way Times Science & Technology Co., Ltd. Nantong Zhongtian Machinery Manufacturing Co., Ltd. Wenling Sanco Mechanical & Electrical Co., Ltd. Shanghai Ruth Constructional Materials International Trading Co., Ltd. Xiamen Taixing Machinery& Electronic Co., Ltd. Guangzhou Jingjin Building Materials Co., Ltd. The Forestry Forum is sponsored in part by:
You want to put the resin into a positive air pressure chamber to reduce bubbling. mircemk has updated components for the project titled All Band Radio with New Firmware. I know it's overkill for auto a/c but I use my pump for other systems and projects as well. It is also responsible for maintaining a controlled vacuum level so that the resin gains acceptable strength. I look forward to giving this a try! | Showroom They are rigid enough and will try to stay apart. the vibrations of the compressor are just perfect to degas all those bubbles imagelinks2[3]="https://woodlandmills.com/portable-sawmills/?utm_source=forestryforum&utm_medium=banner&utm_campaign=2021sawmills"
Id say that ideally you would want both, the vacuum chamber first to get rid of most of the trapped air, and the pressure pot for the actual resin curing to shrink any residual gas to the point its either invisible or compressed enough that it will escape the cured resin over time.
With high water vapor tolerance, the single-stage rotary vane vacuum pump eases the pressure allowing the unit to focus on infusion rather than controlling the other parts that coordinate together. As the name suggests, it can work wherever there is a single-phase power. Judging by Peter Brown videos, many types of resin either outgas while curing or have a ton of dissolved gasses and can just foam to massive multiples of the volume for long enough to ruin the casting. According to experts, it is essential to make sure that the size of the molding matches the displacement of the pump. If you planned everything right that wouldnt be too difficultthen you could release the vacuum, pour into your mold and put under a vacuum or pressure depending on your needs at that point.. A friend of mine pours that liquid glass epoxy over thick wood slabs and creates table tops with it.
For those with 5/8 use a 3 size 5/8 bolt with 2 5/8x2 steel washers and 2 5/8x2 neoprene washers. An old refrigerator compressor makes a brilliant vacuum pump, as well as a high pressure air compressor (92% vacuum and >300psi with one I salvaged from an old fridge put out for garbage collection), I wonder if it would be enough to use a hot container & then whack it in the freezer? If both of them are appropriately connected, you shouldnt have a problem operating the unit. Many people, due to their lack of experience, connect the resin trap to the vacuum pump incorrectly which leads to vacuum leakage. This would be like a pizza over vacuum chamber. After pouring he goes over it with a torch while it is still wet to bring out the bubbles. There are many more reasons why these pumps are the best for resin infusion: Vacuum pumps come with a variety of features and functions, but if you only require it for resin infusion, you should opt for the single-stage rotary vane variant. A vacuum chamber is best or bulk degassing. This might normally be a tall order, but [Jasper] recently found that you can buy small battery-powered gadgets designed for sucking the air out of food containers for as little as $5 USD from the usual import sites. The resin infusion process involves stages where the pump has to simplify and improve its bagging procedure to make things work. Once you have one, it removes an impediment to doing things that require one. imagelinks[5]="https://woodmizer.com/Store/Shop/Sawmill-Options/CookieMizer-Clamping-Jig?utm_source=forestryforum.com&utm_medium=banner&utm_campaign=cookiemizer&utm_term=2021-03-09&utm_content=800x160"
You can have as many as you wish
I guess simplest way to produce vacuum is 3d printed venturi tube, powered by stream of water from garden hose :-), When I cast with clear silicone, it has an incredible 24 hours pot time, so I put my molds into the fridge, and wait; This is crucial because the leakage can reduce the pressure of the infusion significantly.
I ordered one day, get it two days later. myimages2[5]="../../../images/top-banner/behindtheforum.jpg"
Really comes down to the quality of the ply, and the size of the chamber. But I dont always, sometimes I want to keep some bubbles ;o), I bought a set of these vacuum containers when I wanted to try casting pewter into heat-resistant silicone. The control valves are attached to the ends because the demountable joints come with O-ring seals. Gasket cut from sheet rubber works fine. mircemk has added a new project titled All Band Radio with New Firmware. I'm looking into pumps. Christian W. liked Toshiba T3200SXC fix/upgrade: new PSU, LCD, WiFi.
| Country Search Raising pressure also raises the resins ability to dissolve air. Agree with below. I've gathered I likely want a two stage? Then you can still use it for painting if you need to. So, you dont have to worry about arranging for additional power phases to make the pump work. I seem to recall in one of his videos he explained the switch, mostly because the vaccum method would make such a mess if you werent paying attention and youd often get bubbles forming after forming the vaccum sometimes far into the setting cycle. | Once the resin is hardened, air degasses again, but since the resin is hard, it cant create bubbles any more. Most of the cheap vacuum pumps for food packing only pull down to 0.5 bar or so, which is enough to force air out of a flexible bag but only expands bubbles 2x.
0 Members and 1 Guest are viewing this topic. But assuming your parts are small enough, [Jasper Sikken] has a great tip that allows you to construct a simple vacuum chamber for just a few dollars. I guess warming it up could work. | The discussion of mold making and casting objects in various plastic resins. Water and solvent vapors can cause porosity making the infusion impure. I have been pondering if you could make a good enough vacuum chamber out of a couple sheets of 3/4 plywood coated with that epoxy stuff separated by 28s coated with that stuff.
Which is why he ended up using a pressure pot to minimize and dissolve bubbles instead. When [Carl] Says Jump, PCBs Say How High?, CV Based Barking Dog Keeps Home Secure, Doesnt Need Walking. It seems you could use a modified magnetic stirrer, that is a bit more 3D than the type you find in labs, and slow it down a bit so the magnet and motor wouldnt become unsynced with each other . /*
Unlike high-pressure vacuum pumps that need more composite to operate, this variant uses rotary vane technology to substitute that requirement. Mine is super old 3-4mm thick stainless so despite not having a PSI stamped on it I know it will easily take casting pressures (and Ive left the original pressure relief on for now it will be replaced by a new one once I decide how low I want to set it, I think 40psi is probably optimal using pressure). Most importantly, you need minimal cleaning to keep the pump safe for years. I've read on other posts in this subreddit that beat value vacs is a good one. | Affiliate, Product Listing Policy I use the middle one for storing coffee and the small one for degassing. Most modern pressure pots seem to be designed around 15psi pressure differential which is a bit low for resin casting from all my reading and tests. I believe Harbor Freight and Princess Auto have similar ones at similar prices if you wanna get one locally. Remember that the larger the chamber is the more time it will take to pump down to a suitable vacuum, so avoid the temptation to use something larger than necessary. | Suppliers
How about this for an idea, mix the epoxy IN a vacuum. I doubt they pull a huge vacuum, but it gets the job done. imagelinks[1]="http://www.ezboardwalk.com/"
Not sure youd really need the freezer, you can put those type of mason/kilner jars in boiling water for canning, do that and tighten the lid, let cool to room temp. I think Peter Brown even mentioned that when he first used his pressure pot on the channel. Electrolytes, Theyre What Dehydrated Hackaday Writers Crave! The compact structure makes it suitable to use even in small spaces. document.write('')
We use a similar hand pump for degassing resin at work, with good results. Sold by:
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