Preparation of the extrusion | 1 | Install the 90 mm die and the 82 mm punch in the extruder barrel. |
2 | Set the temperatures of the twin screw extruder in the order 175˚C, 175˚C, 175˚C, 185˚C, 185˚C, 185˚C; 190˚C, 190˚C, representing respectively the temperatures of the preheating, degassing, heating, and shaping chambers of the machine. | |
3 | Turn on the electrical control box of the machine’s heating system. | |
4 | Allow to heat for the time necessary to allow the resin that could not be emptied to melt and free the screws. | |
5 | Turn on the electric control box of the machine’s screw system. | |
6 | Let it run for the time necessary to completely release the screws from the sleeve. | |
7 | Place the mixing powders in the order F0, F4.01, F12.54, F23.03, F32.01, F38.01, F51.02 near the extruder. | |
8 | Make a vacuum pass (to make the sleeve completely empty and clean). | |
Extrusion itself (step 1) | 1 | Load the F0 mixture and check the degassing (Pour the F0 mixture powder into the inlet hopper of the extruder. |
2 | Definitely adjust the sizer, the cooler. | |
3 | Finally set the fencer. | |
4 | Final adjustment of the chainsaw; | |
5 | Let the extrusion of the F0 tubes follow its normal course. | |
6 | Make sure that the F0 mixture is completely finished in the hopper (Just a small amount of F0 powder is seen before pouring the next mixture to avoid air ingress). | |
Extrusion itself (step 2) | 1 | Load the mixture F4.01 and check the degassing as you go along. |
2 | Let the extrusion of the F4.01 tubes follow its normal course. | |
3 | Ensure that the F4.01 mixture is completely finished in the hopper. | |
Extrusion itself (step 3) | 1 | Load the mixture F12.54 and check the degassing as you go. |
2 | Let the extrusion of the F12.54 tubes follow its normal course. | |
3 | Ensure that the F12.54 mixture is completely finished in the hopper. | |
Proceed in the same way until the end of the extrusion (steps 4, 5, 6, 7) of formulations F23.03, F32.01, F38.01, F51.02 respectively. | ||
Pass the tubes to quality control by the company’s standards team. | ||
Move on to packaging and storage. | ||
Transport to the ENSP metallurgy laboratories (for analysis and characterization). |