9 Plastic Technology

Report No : 09 Shop: Plastic Technology

Title : Study & Observation the Plastic Technology.

Blow Molding Machine Main parts of a blow molding machine: 1) Extruder (It consists of knife, barrel, cup, pin & screw) 2) Hydraulic tank and pump 3) Mold carriage 4) Blow pin unit 5) Water chiller 6) Air compressor 7) Electronic control box 8) Hopper Raw materials: 1) Polypropeline 2) PVC (Poly venyle chloride) 3) High density polythene 4) Low density polythene 5) Nylon 6) Polystyrin Capacity: Maximum: 1 litre

Minimum: 1 ml

Pressure: Maximum 5kg/cm2 Voltage:

Maximum 220 v

Limitation: •Only container type of bottle shaped job can be prepared. •Mold is made of brass.

Vacuum Farming Machine Main parts of a vacuum forming machine:1) Heater 2) Clamping unit 3) Die table 4) Vacuum pump 5) Vacuum chamber 6) Electric control box Capacity:Maximum capacity of heater unit is 5000C Maximum sheet capacity is 17 / 21 inches Main parts of a compression molding machine:1) Hydraulic pump and tank 2) Movable unit 3) Electric control box 4) Mold plater 5) Heat table 6) Tibar Raw materials:1) Hostain gur 2) Thermoset plastic Capacity:Max. 40 ton pressure can be given. Advantages:•The raw materials that can not be used in any machine can be used in this machine. •Here ejection is used, so the job can be easily removed. Limitation:•Flow can not be controlled. Job :- Melamine, switch.

Polythene Film Blowing Machine

Main parts of a polythene film blowing machine1. Hopper 2.Die head 3.Blower 4.Roller (changeable & fixed) 5.Electric control box Capacity- Maximum diameter 1ft. Raw materials1) Low density polythene 2) High density polythene 3) PVC (Ploy venyle chloride) Job- Polythene bag

Injection Molding Machine Main parts of an injection molding machine 1) Injection unit 2) Mold platen unit (fixed and movable) 3) Oil tank 4) Motor hydraulic pump 5) Cooling unit 6) Electric control box 7) Hopper 8) Doze scale 9) Solenoid Raw materials Nylon - (220-320 )0C Polythene - (150-220 )0C Polypropelin - (200-250 )0C Capacity 3.5 OZ/100 g

Advantage Ejector is available here. Limitation PVC can not be used as a raw material.

Plastic Pipe Extruder Main parts of a plastic pipe extruder:1) Extruder 2) Hopper 3) Heater 4) Barrel 5) Electric control box 6) Die head 7) Vacuum chamber 8) Cooling chamber 9) Take up unit Raw material:Polythene Capacity:Maximum diameter: 1 inch 2 OZ/100 g Advantages:•Ejection is performed four times for removing a job. So, there is no need to remove the job by hand from the machine. •In the vacuum chamber, vacuum is included. This vacuum prevents to change shape of the job. • Here flow control valve is included which controls the pressure. Job:- Plastic pipe

Air Dryer

Main parts of an air dryer:1) Blower 2) Heater 3) Hopper Raw material:-Nylon Operation:- Drying of raw material is performed by the air dryer.

Plastic Wastage Crusher Main parts of a plastic wastage crusher:1) Blades (4 blades, 2 fixed and 2 rotating, arranged in a cross pattern) 2) Motor 3) Belt 4) Metal net 5) Drum Function:It crushes the raw materials into certain shape.