How to control the heating & temperature of glue container of the lamination machine

How to control the heating & temperature of glue container of the lamination machine

How to control the heating & temperature of glue container of the lamination machine ?

The heater has to control the heating of the glue container so that the viscosity of the glue is maintained according to the need of the operator (as subjected to laminate different types of plastic packaging films) .........

There's air & glue present inside the glue container .........

The container of the glue is a cylindrical container ......

I think we can't use thermocouple & digital temperature controller because we have to insert the thermocouple inside the container & we can't do this in this case because there are glue & air insider the glue container which can leak & hence alter the viscosity of the glue which we can't afford to do.

What to do ? any design , any circuitry ? any components ??

thanks

Re: How to control the heating & temperature of glue container of the lamination mach

Send pic of containeer.
use temp controller and change /record the settings say between 70% to 100 % and see what works best for u.next take reading of pwr applied by controller.
good luck

Re: How to control the heating & temperature of glue container of the lamination mach

Can you add picture and/or tell shape and measures of this container.
What is the mass of heated glue and mass of heated container.
What is the needed temperature and tolerance.
What is maximum allowed heating time from room temperature to heater set value

Re: How to control the heating & temperature of glue container of the lamination mach

DOPAG
CH - 6330 Cham
Vario Mix Laminat
900.00.10
Laminat 230/400V TD200

dimensions (external) : 37 inch * 17 inch ......... (length and external diameter of the vessel/container)
volume : 48 L ........
there was a heating jacket of the above mentioned length 37 inch * 17 inch ..... which has the thermostat for controlling purpose ......... but this heating jacket gone bad .........

the graph of the heating of the jacket shows that when we set thermostat on 2 then temperature should be 20 degree Centigrade (C) , on 4 then temperature should be 40 degree Centigrade (C) , on 6 then temperature should be 65 degree Centigrade (C) , on 8 then temperature should be 90 degree Centigrade (C) & on 10 then temperature should be 115 degree Centigrade (C) ........

thanks

Re: How to control the heating & temperature of glue container of the lamination mach

Your original thermostat had a wide range of operation. Much wider than a room thermostat.

I don't think a thermostat from a water heater goes up to 115 C. That's higher than water boiling.

There's the thermostat used in a furnace for water baseboard circulation. It goes up to boiling temp.

Did you normally heat the glue tank to the same temperature each day? If so then you might try using a thermostat like one of the above. Even if it covers a narrower range than your original 20 C to 115 C.

You must find a way to match its range of operation to your range of temperatures. Try attaching it to your glue tank at various locations, or at various distances.

Or attach it somehow to the previous thermal jacket.

Or perhaps install it in an enclosure with an adjustable vent opening. You can attach it to the outside of the glue tank, using high-temperature silicone adhesive. The same kind that can endure the temperatures in car engines.

Re: How to control the heating & temperature of glue container of the lamination mach

there was a heating jacket of the above mentioned length 37 inch * 17 inch ..... which has the thermostat for controlling purpose ......... but this heating jacket gone bad .........

Click to expand...

Do this mean that the heating jacket heater element(s) and control, both must be replaced
with new components.
What is the electric power for heater jacket.

Is your machine in this procure.......
**broken link removed**

Try to ask the manufacturer's representative for replacement parts

Re: How to control the heating & temperature of glue container of the lamination mach

the resistance for the heating jacket is 63 ohms ........ voltage is 230 V ac .......

As i rotate the thermostat knob from the beginning to the end the resistance remains 63 ohms ...... no change from point 1 to point 10 marked around the thermostat knob ...... at position 0 it reads 0 ohms but from position 1 to position 10 it reads the same resistance 63 ohms .......... My thinking is that the resistance should keep increasing when we move from position 0 to position 10 ????

the link that you have provided is the latest Dopag mixer (machine) but the one that i have is somewhat similar to this one

thanks

---------- Post added at 00:41 ---------- Previous post was at 00:39 ----------

can we use a different system or different method other than this to maintain the heating & hence the viscosity of the glue ?

Re: How to control the heating & temperature of glue container of the lamination mach

It's likely your heating element is switched on for a while, then switched off for a while. It's the most efficient use of power.

The thermostats I've seen (the ones connected to mains power or house heating systems) are either on or off. They contain a bimetallic strip which might be coiled, or straight, or slightly curved.

Some have contacts at the end which open and close, depending on temperature. Or the coil tilts a mercury switch. I believe modern digital thermostats contain a relay.

Does your thermostat have a bimetallic spring inside? Could glue have gotten splashed on it? That wouldn't be hard to fix.

The thermostat may or may not carry mains voltage. It's hard to be sure what it means that yours reads 63 ohms at a setting of 1 or more. That may be the value when it calls for heat. Whereas 0 ohms at 0 position means it doesn't call for heat?

Anyway if it has really gone bad, then you might check as to whether another appliance might contain a replacement. Example, roaster oven, slow cooker, coffeemaker, hot plate, laboratory equipment, etc.

If you are good with electronics, there's the idea of using an inexpensive thermistor, op amp, and relay.

Re: How to control the heating & temperature of glue container of the lamination mach

what kind of thermostat should be using in this heating jacket ?

Re: How to control the heating & temperature of glue container of the lamination mach

How to test whether thermostat is working absolutely fine ?