Pulp moulding technology - process

Pulp moulding machine process
We design and manufacture machines that produce a wide array of pulp moulded products.
Step 1 -paper pulp making
The process starts by carefully weighing the (used) cardboard, paper or other fibre before transporting it to the pulper. There, it is mixed with water from a separate water tank to establish pulp. Depending on the paper type and quality, the pulping process takes about 15 to 35 minutes.
Next, the pulp is transported to the moulder tank, where it is further diluted. and the pulp is conveyed to the moulding tank. If required, a colour can be added and cleaning is optional.
Step 2 - The moulding process
Here, the pulp is vacuumed into moulds that have been submerged in the moulder tank.
The moulds are equipped with a fine mesh to allow water to leak away, leaving behind the paper pulp. The longer the suction, the thicker the pulp layer that is left behind.
When the moulds emerge from the water, residual moisture is removed. Incidentally, the water is recovered and pumped back to the water tank, thus minimising waste.
Step 3A - Oven drying for pulp types 1 and 2 moulded products
When producing pulp types one or two, the wet pulp is moved to the transfer forms and placed on a conveyor belt.
The products are transported through the oven, while hot air is circulated to allow drying.
Step 3B -In-Form drying for type 3 products
When producing pulp type three products, the wet pulp is placed in a heated counter form. The products are pressed and dried by the heated forms.
Regardless of the type of pulp moulded product you are making, the entire pulp moulding process is PLC-controlled and fully automatic. An operator controls the various stages of the production process and water and pulp levels, as well as all safety functions, are continuously monitored.
One or more operators take the products from the belt for further processing.
Read more about our equipment:
Pulp moulding machines
Pulp after press machines
Pulp thermoforming machines
Read more at: www.inmaco.nl