Injection Moulding Machines

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Injection Moulding Machines

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Index

  1. What does an "injection moulding machine" do?
  2. How does an injection moulding machine work?
  3. Working with an injection moulding machine
  4. Providers of injection moulding machines
Used injection moulding machine 01

What does an "injection moulding machine" do?

Injection moulding machines are, along with the thermoformer machine, the central production tool for plastic products. Thermoformer machines are used to produce all types of products made out of plastic. Injection moulding machines are very complex machines, which have particular requirements regarding facilities, maintenance and installation.

  • Central production tool for plastic products
  • Very complex machines
  • It is made up of 5 components
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How does an injection moulding machine work?

An injection moulding machine is made up of 5 components: reciprocating screw with a material feed; backflow valve; injection nozzle; double cylinder; and an ejector unit. The reciprocating screw transports the plastic granules from the material tank, past the double cylinder, through to the injection nozzle. As the granule particles rub against each other they heat up (with the help of additional heating) to such a high temperature that they become a paste. Using high pressure, this paste is then pushed through the injection nozzle onto the work piece. There the hot paste cools off within seconds. The backflow valve splits the shell of the work piece in half. The finished product is then released through the ejector unit and falls into the material container to be processed. The plastic, which is pushed through the channels of the machine, harden up just like it does on the workpiece. Therefore, using an injection moulding machine always produces a lot of waste. Modern machines split the product and the injection channels during this stage, and collect the waste in a separate container.

KLÖCKNER - FERROMATIC Injection moulding machine in use

Working with an injection moulding machine

Injection moulding machines are electronically and hydraulically operated. Additionally, the double cylinder is heated to very high levels. This means that the maintenance of an injection moulding machine is complex and can be dangerous. The occupation (a plastic shaper) of maintaining, relocating and installing an injection moulding machine requires special training. Various components such as the injection pressure, the temperature or the retention time of the product in the machine, all have to be organised in conjunction with one another. Otherwise, there will be insufficient results or inefficient productivity. An injection moulding machine can run manually or completely automatically. Assistants would be qualified enough to run the machine manually. Using a removal robot should be considered because even though it is possible to manually take the products out of the machine, this requires reaching into the machine while it is exerting extreme amounts of pressure. This can lead to severe injuries. Therefore, the manual operation of injection moulding machines is slowly being phased out. The safety regulations add another step in the processing procedure: before the injection moulding process takes place, the safety system (protective covers) must be closed. The use of a removal robot is very useful and can increase production efficiency.

Used injection moulding machine 02

Providers of injection moulding machines

Injection moulding machines are available internationally and many manufacturers are specialised in producing these machines. Injection moulding machines are extensively available. The most well-known manufacturers are: ARBURG, BOY, ENGEL, KRAUSS MAFFEI and STORK.

Spritzgießmaschinen gebraucht 03
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