what is extrusion blow moulding?
It is either Extrusion Moulding OR Blow moulding Blow moulding is like blowing up a balloon into a jelly mould This is how they make Bottles and the trays chocolates are packed in Extrusion Moulding is Forming molten plastic through a die to make continueous lengths of a particular shape … Curtain track INJECTION MOULDING is forcing molten plastic into a mould . Typical INJECTION MOULDED parts are: Car trim , Car mirror Bodies, Computer Monitor Housings , the keys on the key board etc . The settings will be Temperature , screw feed/ speed, mould time ( to open from closed) Die opening distance Sort out which ones apply to which process your self! As you are dealing with Hot materials that is the main Safety feature BUT the machinery is also moving so lock out , guarding and photo cell barrier must be in place .
Extrusion blow moulding doesnt exist, you either have an extruded product or a moulded product not both. An example of an extruded product is PVC window frames. The questions you are asking sound very similar to those in a Polymer Processing NVQ course. The main components should be: Hopper (holds raw material) Doser (feeds material into the extruder) Screws (feeds material through the extruder) Barrel (heats the material as it goes through the extruder) Barrel Vacuum (removes gas from material) Adapter (attaches the die to the extruder) Breaker Plate (evens the flow of material /removes contamination) Die (provides basic shape and form to the material) Calibrator (uses vacuum to suck the material out to full shape) Bath Tanks (cools and continues to shape the product) Haul Off (pulls the product through the entire process) Saw (cuts the product to desired length) note that not all extruders are the same but will contain all of these key components, some however can have more depending
