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zsmith3rd(at)earthlink.ne
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 Posted: Tue Jun 20, 2006 7:46 pm Post subject: Plastic fuel tanks |
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Dave!!
Great question....I have also wondered. Inquiring minds, etc
The firms that make containers such as you mention are many....problem is, how does one assault the problem.
Some years ago I observed a rather large plant in Lincoln, Nebraska, that made all sorts of "plastic" tanks for farm & ranch use, chemical containers, barrels for acids, and so forth. This isn't the only manufacturer, but your post jogged my memory. Must be dozens of places doing custom work for all sorts of applications.
Surely there is a Lister familiar with the process and materials.
In the case of the 701, a tank of the approximate same dimensions, even if it only held nine gallons, might be nearly a stock item at one of these firms. Since it would be molded it would likely have rounded corners, and possibly the wall thickness might be optional.
Lots of the larger lawnmowers use non-metalic fuel tanks, likewise construction machinery, welders, pumps, and somebody is making these tanks for the machinery manufacturer.
Not sure what 'blow molding' involves, but it can't be rocket science.....the mold itself might be the determining factor as to cheap tanks.
Somebody jump on this one......or start selling tanks. Another franchise opportunity. You want cheese wit dat?
I'll be out a few days, can you come by and mow my yard? Feed the hangar cat while you're there.
do not archive
Regards,
Zed
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thilo.kind(at)gmx.net
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| Posted: Wed Jun 21, 2006 1:32 pm Post subject: Plastic fuel tanks |
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Hi Zed,
blow molding is a process not suitable for a homebuilder. You will need a
blow molding machine consisting of an extruder and a proper die arrangement.
The extruder melts and conveys the plastic resin through a ring die, thus
creating a hose. This hose is then pinchedat both end by the two halves of
the mold. Air is blown into the hose, expanding the still molten plastic
resin into the mold.
The machine is a serious piece of equipment. In addition, you will need the
mold, which is also very expensive.
To top that, a fuel tank is a multi-layer product. The wall of the tank
consists of multiple layers of plastic. Each of the layer has a certain
funtion such as mechanical support, electro-static discharge, fuel barrier,
etc.
Due to the cost of the machine you will need to produce at least 20 to 30
tanks per hour in order to have a feasible business case.
Rotor-molding is probably a more suitable procedure for the homebuilder
industry. This process allows production of small lots of tanks.
Happy building
Thilo Kind
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