The shaping, drying and hot pressing of egg box

Normally, the products coming out of the egg box machine is loosed and soft in texture, it’s necessary to condense the egg box into a solid consistency, or density. One of the solution is to use condense machine, the semi-fiinshed egg box is placed between two molds, when the molds are closed, the extra moist will be squeezed out. This function is included in the egg box shaping sections.

The water proportion ranges between 100%~300% after coming out of the egg box molding machine, the desired proportion is 9%~10%, sometimes even 3%~4%.  The drying of egg box is finished inside a closed continuous and circulated tunnel. Direct solar drying is also adopted in some egg box plants, even though the drying result can not be described as satisfactory. There are several kinds of drying oven: fuel type, steam type, electric type. The microwave type had been developed in recent year but is not in commercial use yet.

For a perfect appearance, the egg box should be hot pressed to adjust the shape. For egg tray production, this section is sometimes removed as there is too much requirement for egg tray appearance. After hot press, there can be a edge trimming machine to cut off the extra burr on the box products.