CNC FREAK Posted March 6, 2014 Report Share Posted March 6, 2014 i'm planning to make an injection machine for large production i have seen the jacob baits injection machine but i need something bigger something to create thousands of baits/day i was thinking of 2 pressured pots with high volume plastic has anyone knowledge about this ? some tips ? Quote Link to comment Share on other sites More sharing options...
Kajan Posted March 6, 2014 Report Share Posted March 6, 2014 Use the search engine, you should find bou'cou' info Quote Link to comment Share on other sites More sharing options...
simsbait Posted March 7, 2014 Report Share Posted March 7, 2014 e-mail me at simsbait@att.net Quote Link to comment Share on other sites More sharing options...
Painter1 Posted March 7, 2014 Report Share Posted March 7, 2014 Carolina Mike has experience from small to XL and has a lot of current knowledge about high production systems. He might be the man you want to communicate with. 1 Quote Link to comment Share on other sites More sharing options...
fishon-son Posted March 8, 2014 Report Share Posted March 8, 2014 your looking for a heater cartridge...or coil type that in or go to maxiwatt.com good luck they have all that you will need Quote Link to comment Share on other sites More sharing options...
Baitjunkys Posted March 8, 2014 Report Share Posted March 8, 2014 For a pot, I would use a disk heater myself. Band heaters are nice to, but they heat from the side, the disk heater will heat the bottom. Blanket heaters are very expensive. Quote Link to comment Share on other sites More sharing options...
CNC FREAK Posted March 9, 2014 Author Report Share Posted March 9, 2014 (edited) i was suprised of the high price for the band heaters... but ok maybee its better, i was thinking that bandheaters would heat up the liquid much faster because the contoursurface of the pot is bigger than only the surface of the bottom i'm thinking about using square pots in thick aluminum that holds the heat square pots would be easier to screw to each other, also easier to make the 2 color injection system at the bottom because i could place them closer to each other than with round pots i'm placing 2 automatic stirrers at the top, dont know if mixing in square pots would be a problem Edited March 9, 2014 by CNC FREAK Quote Link to comment Share on other sites More sharing options...
mark poulson Posted March 9, 2014 Report Share Posted March 9, 2014 Speaking strictly from air flow for chimneys, the corners of a square duct/vessel will not mix well. That's the reason masonry flue liners are oval, not rectangular. The corners actually cause resistance. Old masonry chimneys with rectangular flues make of brick have the most soot buildup in the corners, because the air doesn't flow there. I'm guessing liquid plastisol will behave in a similar way. Think of eddies behind shoreline structures in rivers. You might be better off using round pots, and encasing them in a square holder. Quote Link to comment Share on other sites More sharing options...
CNC FREAK Posted March 9, 2014 Author Report Share Posted March 9, 2014 good idea mark, thanks i'm thinking about how to heat this beast i would like to have 2 pots of 5 quart plastic Quote Link to comment Share on other sites More sharing options...
Painter1 Posted March 10, 2014 Report Share Posted March 10, 2014 +1 on the problem with 90 degree corners and mixing/flow. We have designed a few of our own industrial coating mixing systems and have had very poor results with squared corners for a reservoir Quote Link to comment Share on other sites More sharing options...
Vodkaman Posted March 11, 2014 Report Share Posted March 11, 2014 The 'holds the heat' comment in post No7 was a bit strange, because aluminium is actually the best conductor of heat. But, you want a good conductor to get the heat from the source element to the plastic. A good stirring system is essential to get the heat away from the aluminium and mixed into the plastic. A square pot would burn the plastic in the corners, with no stirring action to move the hot plastic away from the walls. Dave Quote Link to comment Share on other sites More sharing options...
CNC FREAK Posted March 11, 2014 Author Report Share Posted March 11, 2014 Thanks Dave for the advice, its clear to me know, square pots are not ok i will use round pots Quote Link to comment Share on other sites More sharing options...
carolinamike Posted March 12, 2014 Report Share Posted March 12, 2014 From what I can gather, you guys are talking about heating a round pot, this sounds very similar to what LureCraft already has and theirs has already proven that this is not the best way to heat plastic. I know, I have owned two. Its impossible to do white or other light colors because you're heating the sides of the pot, even if it is continually adjitated, it does not heat evenly and if you adjitate hot plastic you incorporate air bubbles. So maybe I can add a different track of thinking here, The round pots can be great for feeding a heat exchanger. They can be pressurized and adjitated without incorporating air or lets say incorporating air to the raw material dosent make any difference when thinking along these lines. You can buy painting pots with air adjitators that can act as a resivior for your raw material which can be pressurized to feed a heat exchanger. The heat exchanger must be built in way that the raw plastisol enters from one side and plastisol ready to pour exits from the other, this is basically how all injection presses work. You will need a press to hold the mold to build a machine to produce the volume mentioned in the beginning. One thing to keep in mind is that you want at least half of the plastic leaving the heat exchanger per cycle, this keeps flake and other components suspended, colors stay true, and plastic does not burn. Thinking along these lines will help you build a proper machine but by the time you invest in building your own machine, you can probably buy used equippment from someone like Sims just as cheap or cheaper. Quote Link to comment Share on other sites More sharing options...
Baitjunkys Posted March 12, 2014 Report Share Posted March 12, 2014 shot from a presto pot. With modifications. Stirring at 100 rpm. Heat the pot from the bottom, I think its doable. Ring heaters can be had as inexpensive as a band heater. Just my opinion. Quote Link to comment Share on other sites More sharing options...
Baitjunkys Posted March 12, 2014 Report Share Posted March 12, 2014 You dont want to oversize your heater either. Even tho its controlled, over wattage is gonna give you a overheated surface "side or bottom" causing scortching. I personally at full power wouldnt want my pot empty to get a surface temp over about 370. Heat exchanger will be totally different as it has to heat it pretty quick. Quote Link to comment Share on other sites More sharing options...
Baitjunkys Posted March 12, 2014 Report Share Posted March 12, 2014 More I think about it. More I like the idea you have Mike. Pressure pot pushing thru a heat exchanger. Obviously would be a bit more costly. But would work really well I think. Quote Link to comment Share on other sites More sharing options...
carolinamike Posted March 13, 2014 Report Share Posted March 13, 2014 It will definitely work. There's already machines like this on the market and they have been used for years, but out of common courtesy, I really can't go into any great details, all I can really do is tell you the basics, and besides a Presto pot by itself really couldn't be considered a plastic machine. If you want to thousands per day efficiently, then automation is a must and pretty well standard in the industry. 1 Quote Link to comment Share on other sites More sharing options...
CNC FREAK Posted March 14, 2014 Author Report Share Posted March 14, 2014 how does a heat exchanger looks like for this kind of use? anyone got a link ? Quote Link to comment Share on other sites More sharing options...
