Extrusion heads typically refer to key components used in various mechanical equipment. Their core function is to achieve specific functions such as material forming, gas conveying, or power conversion. Specific characteristics vary depending on the application field.
1. Plastic Extruder Head: Used for continuous extrusion molding of plastic products such as pipes and films.
Structural Composition: Mainly composed of a filter plate, distributor, die, mandrel, and head body.
Functional Features:
Filter Plate: Filters impurities from the melt and improves plasticizing effect through shearing action.
Distributor: Converts cylindrical material flow into annular flow, facilitating uniform heating and plasticizing.
Mandrel and Die: Together form an annular extrusion channel, forming the inner and outer surfaces of the pipe respectively.
Adjusting Screw: Allows fine adjustment of the gap between the die and mandrel, ensuring uniform product wall thickness.
2. Roots Blower Head: As the "heart" of the blower, responsible for gas intake and pressurized delivery. Core Structure:
Rotor System: Employs a figure-eight or trilobal rotor that rotates in opposite directions under the drive of synchronous gears to achieve volumetric gas delivery.
Sealing System: Includes labyrinth seals, skeleton oil seals, etc., to prevent gas leakage.
Lubrication System: Protects gears and bearings through splash or forced lubrication, extending their lifespan.
Technical Requirements: The clearance between rotors and between rotors and the housing must be controlled within tens to hundreds of micrometers to balance anti-friction and low internal leakage.
3. Engine Head (Motorcycle/Automobile)
Refers to the upper assembly of the engine, directly affecting power output and operational stability.
Main Components: Includes cylinder head, camshaft, valves, intake and exhaust manifolds, etc.
Functions:
Seales the combustion chamber to prevent mixture leakage.
Controls valve opening and closing sequence to ensure intake and exhaust efficiency.
Provides lubrication and cooling channels to prevent overheating.