Nylon CNC Machining Tolerance 0.05mm Extrusion Insulated Plastic Screw Bolt
The plasticizing screw can be divided into four zones according to its function:
1. Solid Conveying Zone (solidconveyingzone)
This section is connected with the feeding hopper, and the plastic solid particles are tightly compressed to

form a solid bed, which is subjected to the shearing effect of the melt cylinder, which not only increases

the temperature of the plastic gradually, but also transports the plastic forward.
2. Delay of melting (delayofmelting)
This section is the area from the end of the solid conveying zone to the area before the formation

of the melting pool (meltpool). Its main feature is that a film layer composed of melt is formed on

the surface of the solid bed and the melt cylinder, and the melt in the film layer is adhered by the

melt cylinder. The drag force accumulates in the front screw groove, and the pressure formed at

the end of this area is large enough to deform the solid bed, and the accumulation in the front

screw groove gradually forms a melting pool.
3. Melting zone
This zone is the end of the melting delay zone until the plastic is completely melted. This zone can

be divided into two parts to discuss, one is plastication, and the plasticization mainly comes from

the shear effect of the melt barrel, and the other It is melt conveying (meltconveying), which

conveys the melt to the melting pool.
4. Melt conveying zone (meltconveyingzone)
When all the plastics are completely melted, they begin to enter this section, and end at the end

of the plasticizing screw, to maintain a uniform temperature of the melt and stabilize the flow of

the melted plastic.