The structure principle of Twin Screw Extruders for Powder Coatings is about the fundamental mechanism of the extrusion process. In short, a screw rolls in the barrel and pushes the plastic forward. Twin Screw Extruders for Powder Coatings tells you that the screw structure is an inclined surface or slope winding around the center layer. The intention is to add pressure to overcome the greater resistance. As far as the extruder is concerned, there are three kinds of resistance needs to be overcome during operation: one is friction.

Twin Screw Extruders for Powder Coatings tells you that it includes the friction of solid particles (feeding) against the barrel wall and the friction between them during the first few revolutions of the screw (feeding zone); the second is that the melt is in the barrel. The adhesion on the wall; the third is the internal logistics resistance of the melt when it is pushed forward. According to Newton's theorem, if an object is at a stop in a certain direction, then the object is in equilibrium with the force balance in this direction.
Twin Screw Extruders for Powder Coatings tells you about the screw that moves in the circumferential direction, it has no axial movement, that is, the axial force on the screw is in a balanced state. Therefore, assuming that the screw exerts a large forward thrust on the plastic melt, it also applies a backward thrust of the same size but the same direction to another object. Obviously, the thrust it exerts is acting on the thrust bearing behind the inlet.
Twin Screw Extruders for Powder Coatings tells you that most single screws are right-handed threads. Assuming that they roll in the opposite direction when viewed from the rear, they are screwed out of the barrel through a rotating motion. In some Twin Screw Extruders for Powder Coatings, the two screws roll in the opposite direction in the two cylinders and intersect each other, so it is necessary to be one to the right and the other to the left.
Twin Screw Extruders for Powder Coatings tells you about biting twin screws, the two screws roll in the same direction, so it is necessary to have the same orientation. However, no matter what the situation is, there are thrust bearings that accept the backward force, which still conforms to Newton's theorem.