Hybrid Novel Additive Manufacturing for Sustainable Usage of Waste

Table 4

Comparison of dough making with a metallic paste composite manufacturing using 3D printing [63].

Referenced document

Dough-making technique

The method for the paste metallic composite comprising of; 1) Dispersant of the metal dust of 80-90 weight portion and 1-2 weight portion is uniformly dispersed in high-speed disperser, for subsequent use; 2) Metal dust of step1 dispersion treatment, the silicone of 5-10 weight portion, and the tackifier of 1-3 weight portion are added airtight stirred tank, setting stirred tank temperature is 60-65 DEG C; by the rotating speed mixing 20-30 min of 200-400 rpm, obtain metal powder and silicone is the body of paste of key component; 3) Curing catalysts of 0.1-0.5 weight portion being added step-2 metal powder that obtains and silicone be the body of paste of key component, open the vacuum of the airtight stirred tank, vacuum pressure 0.1-0.3 MPa, and mix with the rotating speed of 50-100 rpm; curing catalysts are dispersed in metal powder completely, and silicone is in the body of paste of key component; 4) By the material discharge that airtight for step-3 stirred tank obtains and seal and preservation, be a kind of paste metallic composite printed for 3D.

Nonsegregated waste material that includes food, plastics, and E-waste was collected and stored inside the chamber. The chamber dispenses nonsegregated waste material into the UV disinfectant unit via a conveyor; said UV disinfectant unit removes the harmful germs and water content in the nonsegregated waste material to form solid waste.; The disinfected solid waste then enters the shedder which powders the solid waste.; The powdered solid waste is then stored in the storage unit.; The powdered solid waste is mixed with components one by one in the mixer to form a dough. Said components include waste foundry sand 5%, waste stone powder 5%, and binder 30%. The powdered solid waste is mixed with waste foundry sand and mixed well in the mixer to form a first mixture. The waste stone powder is then added to the first mixture and mixed well in the mixer to form a second mixture. Araldite is then added to the second mixture and mixed well in the mixer to form the synthesized dough.; The synthesized dough which is used as a printable source is then sent to the 3D printer which prints the final component as per the requirement.; The 3D printer includes UV lamp units fixed to the printing head on either side which disinfects the dough and as well as dries the dough. Drying the dough leads to the achievement of good binding of materials.; The dough hardness is around 70 Brinell hardness units.