Exfoam System: The Most Efficient Way to Produce Foam

trough system

MaxFoam is a technology for continuous foaming invented by the machine manufacturer ladar burgo, In this article we’ll tell you what MaxFoam actually does, its advantages and disadvantages, as well as alternatives.

Maxfoam: what does it really mean

“MaxFoam” itself is the trademark name of several Lader Berg continuous foaming machines. When we talk about “MaxFoam Process” in the industry, however, most of the time we are referring to it. trough.

A continuous foaming machine mixes the polyol and TDI together. They then react on a running conveyor. As the liquid travels, it expands and gels in the polyurethane slabstock (learn more about how PU foaming works here).

There are two primary ways to introduce liquid chemicals to the conveyor: by liquid laydown and by trough.

liquid laydown

Let’s cover the liquid laydown method first because this is the first time a continuous foam was created. Basically, chemicals are injected into a mixing head that hovers over the foaming conveyor. The liquid is kept “down” from that foaming head and the foaming process begins. This method is straightforward and easy to control. The foam produced by liquid laydown also has fewer pinholes. It is generally of superior quality, with fewer pinholes and a uniform density throughout the block, making it the foaming method of choice for apparel and car interior foam manufacturers.

liquid laydown

trough system

In contrast, we have the trough system. Maxfoam is a trough system. Basically, a long trough is attached to the very front of the foaming conveyor. The foaming chemicals are fed into the trough through the pipes below and as the trough is filled, the liquid is spread over the conveyor after some time. stay time,

Then what are the benefits of Maxfoam? Well, in a liquid laydown system, the chemist needs precise control over the conveyor speed. If the conveyor foam travels faster than the higher layers of the can gel, the block begins to shear, and instead of vertically uniform foam you get torn layers. This is partly because freshly mixed chemicals need a little time to react, and they can’t do so if a conveyor is constantly pulling their feet out from under them.

This is where the trough system comes in handy. The chemicals begin to react during the stay time, so when it’s poured onto the travel conveyor, the gel forms more quickly and all at once.

liquid laydown vs trough system

collapse plate conveyor

Another feature of MaxFoam is the use of fall-plates as a foaming conveyor. This means that the foaming chemicals are angled downward at a controlled angle as they expand and gel. Flat conveyors are ideal for continuous foaming, but this actually limits the maximum height that slabstock can extend. This is because there is only one direction for expansion, and gravity can exceed the upward potential of the reaction.

However, on a downward slope, slabstock can expand both upward and downward. If you want to minimize material costs by maximizing product yield, consider a fall-plate conveyor.

high pressure foaming

Speaking of reducing material costs, high pressure foaming can help you reduce 2-4% of TDI losses during construction. “High-pressure” refers to the chemical being injected into the mixing head, not the fall-plate itself. This method mixes chemicals more evenly, promoting faster and smoother reactions with less material waste. plants with foam polyester High-pressure foaming is also required due to the viscosity of the raw material.


Lader Berg claims that MaxFoam is the most prevalent continuous foaming method on the market. Now you know about the potential advantages and disadvantages of trough system. Thinking of investing in persistent foam? Counseling a Sunkist plant-planning expert today.

Leave a Reply

Your email address will not be published.

Related Post