Molten Products Packaging Equipment
The general definition of molten is "liquified by heat", so that a molten product is one that takes a liquid form once heated to a certain temperature. Some examples of a molten product include candles, pastes and deodorants. In other words, as far as packaging goes, molten products are solids or near solids that are liquified for the filling process. Some packaging machines may be manufactured with slight modifications to handle molten products, while other machines will work just as well with molten products as almost any other liquid.
Liquid Filler for Molten Products
The liquid filling machines used for molten products will look a lot like any other filling machine at first glance. However, an added element of such a machine will be a heated product pathway. The heated pathway can be achieved in several ways, but in general terms, the product must remain at a constant temperature (or within a constant range) from the tank and through the tubing and nozzles before reaching the bottles or other containers. The constant heat keeps the viscosity of the molten product consistent, allowing for reliable fills.
Cooling Conveyor System
In addition to a modified filling machine, a packaging line for molten products may container just a few more conveyors than one might expect. As product comes out of the filler and into the container we have already established that the temperature will be higher than room temperature for a molten product. Before moving to other packaging machines, the molten product may need time to settle or cool. This settling is achieved with a cooling conveyor. Cooling conveyors may include a fan system to speed up the process or they may simply consist of an extended conveyor system that will give product the opportunity to reach a temperature that will not interfere with capping, labeling or other packaging processes.
Capping and Labeling Machines
Once the product has spent time on the cooling conveyor, the capping, labeling or other machines usually need no modification. The products are cooled so that heated product will not expand and/or cause damage to the container itself, so the cap will seal reliably and so the label will also be applied reliably and consistently. Given that the product has reached its solid or semi-solid state and has cooled considerably, the machinery after the cooling conveyor used for molten products will be the same as those products used for other liquids. Of course, each and every project will have unique characteristics, so that some modification may be necessary even if the molten product is not the cause.
To learn more about molten products and the machinery used to package them, call our offices toll free to speak with a packaging professional.