Lid Heat Sealing Machine
Lid Heat Sealing Machine Model-1.6 |
Lid Heat Sealing Machine Model-3 |
Lid Heat Sealing Machine Model-5 |
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Function of Lid Heat Sealing Machine:
Lid Heat Sealing Machine seals Lid with container. Machine melts lid & container simultaneously & presses to seal together and form a single identity so acid does not leak out. Lid Heat Sealing Machine saves labour cost and cost of adhesive material. In turn it reduces inventory cost which will be inherited when battery is on hold for drying period and labour is involved in drying process.
We already know that cover is having more material to melt than container so accordingly time and temperature required for both are not equal. Best sealing is done once LIP JOINT is made as shown in following diagrams.
If this is not done, it will result in leakage. Best Heat Sealing is done in homogeneous material. If materials are different for cover & container then also it will leak at later stage.
How exactly it all functions this follows: Cover from battery is picked up by the top fixture either by vacuum or by hooks.
Vacuum cups are not preferred due to its recurring cost involved and at the same time vacuum pump will consume energy (Power). Life of vacuum Pump is also limited. So, Vacuum system is very old technology. Of course, This system can be used in one fixture to house different type of covers at the expense of accuracy.
In Hook system we have to have different fixtures for different type & size of covers so it becomes more expensive to invest but in return we get more accuracy. Life of this system is equivalent to the machine. No extra expenditure on power to operate Vacuum Pump & its maintenance.
Once cover is picked up Hot Plate comes forward. Top Platen moves downwards to touch with heated platen & make heating platen to touch container.
Temperature has to set as per container manufacturer. Set point of Temperature will depend on the material and grade of plastic of container and its cover. It varies manufacturer to manufacturer. Once temp is attained, wait for another fifteen minutes for equalizing temp to full hot plate.
Once both are heated to certain temperature where plastic is not melts away but it remain there then these are operated to apart automatically. Heated platen will retract to its home position. Cover will be pressed against container in two cycles which are so fast that both the cycles can be not noticed with out high speed Videography. This can be seen in drawing.
