Chris Ryser - INVENTION

[HarryChiling]

Chris,

You should design an induction tint tank, energy efficient, should not require heat transfer fluid, and attains consistent temperature very quickly.

[Craig]

How about the new magnetic technolgy that is used on cooktops? My in-laws just got one last week and it is very cool to the touch and the eyes.

[Chris Ryser]

More for engineers:
Maxwell Equation Electro magnetism fundamental Laws

rot H =j +∂D/∂t
rot E= -∂B/∂t ;
D=εE
B=μH

Induction Heating

[HarryChiling]

How about the new magnetic technolgy that is used on cooktops? My in-laws just got one last week and it is very cool to the touch and the eyes.

You got it Craig it's called induction, it would be neat to see it used in a tinting application.

[Chris Ryser]

Induction heating is the process of heating conductors, (usually metals), by inducing an electric current to flow in the object to be heated. Current is induced into the object in the same manner that current is induced into the secondary of a transformer.
An alternating current is applied to the primary of a transformer, which creates an alternating magnetic field. The secondary of the transformer is located within the magnetic field. Faraday's Law shows that an electric current will be induced into the secondary of the transformer.
In induction heating, a coil of copper is wound around an object to be heated. The coil of copper can be compared to the transformer primary, and the object to be heated can be compared to the secondary of the transformer.
The object to be heated acts like a single turn secondary in a transformer. Additionally, the object acts as if the single turn secondary were short circuited.
Thus, applying an alternating current to the induction coil induces a current into the object to be heated. Imagine how a short circuit secondary on a transformer would heat up if you connected power to the primary!
So, you can heat metals without flames and without touching the object to be heated. You can even heat the metal underwater.


Desk-Top Induction Heater 20-100 KHz 7KW - EQ-SP-15A

Sale Price: USD$3,695.00

[MikeAurelius]

Actually, induction isn't really required (it's very expensive too). It can be done quite easily with directly applied heat coils sintered or bonded to the bottom of the color pot. There are digital temperature controllers available that can monitor multiple sources, all that is needed is thermocouples (think thermometers) and SSR's (solid state relays), and you'd be in business.

It could probably be done in mass production for a couple of hundred per 12 pot unit.

It surprises me that this kind of technology hasn't made it (yet) to the optical lab!

There are a variety of insulating materials that could be used, but I think cast long fiber is perhaps the best. There are many business that create insulation castings for very similar products, I'm sure one could easily be designed.

[Chris Ryser]

Actually, induction isn't really required (it's very expensive too). It can be done quite easily with directly applied heat coils sintered or bonded to the bottom of the color pot. There are digital temperature controllers available that can monitor multiple sources, all that is needed is thermocouples (think thermometers) and SSR's (solid state relays), and you'd be in business.

Something was done along these lines in the early 1990s with big fanfares at a couple of VEE's. About 2 years later the company disapeared with their dry tinting units.

'But you are right.........nobody is going to pay the price, only what a generator control box is costing. Then you need a lot of R&D to find a solution to make a tinting unit.

If you want to tint fast, heat fast and in quantities, better invest a few thousand in a commercial microwave and use the patented Micro Tint system and you can tint your tons of high index and Poly's to dark shades in a few minutes, and the small user can get a good household microwave and do the same in small quantities at a time. Then the whole investment for equipment is around a 100 Dollars.

[MikeAurelius]

And analog tempstats (thermoswitch) are available for like $40.00 each, can also be bonded to the pot to keep costs down. This would be identical to what Coburn uses (used) on their 99 blockers and deblocking tanks.

[harry a saake]

E-mail Jerry Huang, as he would say, not hard to do, and he will have it built tomorrow

[fjpod]

It's been invented already guys. It's called a Hotpot. Some come with a temp switch to keep the water from boiling, some can be easily modified to prevent boiling. They work great. They are fast, you only heat the color you need, they're cheap. there is no HTF, when a unit fails, you throw it away and buy a new one for $10... We've been using them for about 15 years now. They look a little silly, but they have stood the test of time.

Not to take anything away from the micro-tint system. I'm sure it works well too.

[DragonLensmanWV]

Something was done along these lines in the early 1990s with big fanfares at a couple of VEE's. About 2 years later the company disapeared with their dry tinting units.

'But you are right.........nobody is going to pay the price, only what a generator control box is costing. Then you need a lot of R&D to find a solution to make a tinting unit.

If you want to tint fast, heat fast and in quantities, better invest a few thousand in a commercial microwave and use the patented Micro Tint system and you can tint your tons of high index and Poly's to dark shades in a few minutes, and the small user can get a good household microwave and do the same in small quantities at a time. Then the whole investment for equipment is around a 100 Dollars.

I still have one!! The DryFarce ,er DryForce from a deservedly dead company. Don't get me started.