Plastic injection moulding machines and processes
Injection moulding is the process of manufacturing parts by injecting a liquified solid into a mould and allowing it to solidify, usually by cooling, thus taking the shape of the mould.
Injection moulding is a very popular method of producing parts as there is the potential to output a large number of products in a relatively short period.
What is an injection moulding machine?
A plastic injection moulding machine is production equipment that is used to create plastic parts via a moulding process.
The machine first heats and liquefies plastic granulates. This molten plastic is then injected under pressure into a mould. The mould is filled with the molten plastic and then cooled for the plastic to harden and take the shape of the mould.
Why use an injection moulding machine?
Plastic injection moulding is the most efficient process for the manufacturing of a large number of parts at a low cost.
The process is faster and less expensive than CNC or 3D printing machines and produces less waste than CNC machines.
What is the downside to injection moulding?
The main issue with injection moulding is with the initial setup.
Not only is the equipment expensive, but the steps involved in manufacturing the perfect mould can be a time consuming one filled with many trials and errors, especially if your part has a complicated design.
What are some of the considerations with injection moulding?
One of the key things to consider before attempting to purchase a plastic injection moulding machine is whether or not it is worth it.
You will need to calculate the initial setup cost as well as your operational costs. Compare these figures to your potential profit and determine if it will be profitable to proceed with the purchase.
You also need to consider the specifics of your finished product. This will determine if you need a machine with heated runners and whether you will be using thermoset (non-reusable) or thermoplastic (reusable) material.
Injection moulding- advantages and disadvantages
Advantages of Injection Moulding
- A large number of parts can be manufactured in a relatively short time
- Low labor cost due to the process being highly mechanised
- High level of consistency with the manufactured parts
- Low amounts of waste material
- Parts are easily customisable as it relates to various colours and types of plastic
The Disadvantages of Injection Moulding
- High start-up cost especially from the manufacturing of the mould
- Not as efficient for low yield productions
- Not ideal for producing highly complexed parts
The benefits of injection moulding
Overall, the plastic injection moulding machine is a great piece of machinery to have.
The speed, reliability, effectiveness, and low operating cost make it a continuous staple in the manufacturing sector.
If you are interested in learning more about injection moulding machines, it is always advised that you stick with proven experts in the field.