What is Injection Moulding?

Injection moulding (or Injection molding) is a process of producing parts by injecting plastic material into a shaped mould at high temperature and pressure. It is probably the most used moulding method of plastic parts in the world. Injection moulding can be performed on a wide variety of materials ranging from metals like aluminium to

How are trains controlled and signalled?

Rail travel is one of the safest mode of transport. Making it safe, efficient and reliable in art in itself. This is the story of how we control trains – the block system, signalling and the different technologies used to control the network. Adapted from : https://www.networkrail.co.uk/running-the-railway/looking-after-the-railway/signalling/

What to do during a part drawing revision

Part drawing revisions are something every engineer would have to go through almost regularly. It actually pertains to the very aspect the part was designed to be. Revision also come in a variety of types: it could be something related to non-manufacturability, part function improvement or just a drawing revision to make the specification a

What is rework?

Rework is the term used for corrections made to a finished part due to the finished product being out of specification. Rework is usually done usually for mechanical specifications. It may either be done manually or using machines. In manufacturing, rework would denote an event that is unfavourable to quality, cost and delivery (QCD). An

What is Natural Tolerance?

The natural tolerance in manufacturing systems is defined as 6σ where σ is the standard deviation of the observed data. Being 6 times of standard deviation would mean that natural tolerance includes 99.73% of observed variability in dimensions. Take a look at the graph below. Each band has a width of 1 standard deviation. The

What is SPPC? What to do with SPPCs?

If you are working in an OEM dealing with vendors or are working with a vendor, you probably have heard of a term called SPPC. What is SPPC? SPPC is the abbreviation of Special Product and Process Characteristics. Sometimes, they are also called Key Product/Process/Control Characteristics. They are the most critical characteristics of a part.