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Single point cutting
Science, Maths & Technology

Single point cutting

...article] Boring Facing on a vertical boring machine [Diagram to demonstrate 'Single point cutting' - see article] Planning/shaping [Diagram to demonstrate 'Single point cutting' - see article] Internal boring on a horizontal boring machine [Diagram to demonstrate 'Single point cutting' - see article] Production of a flat surface on a shaper [Diagram to demonstrate 'Single...
Learning to swim in murky seas: Exploitation of the Electorate via Social Media
Health, Sports & Psychology

Learning to swim in murky seas: Exploitation of the Electorate via Social Media

...article on Brexit and the General Election...[five young people in vibrant clothes look at tablets and phones together in front of a blue background. ] Bias does not just affect decision-makers - it is at the root of many electoral behaviours. More to the point, the tendency of human beings to be biased can be exploited in political campaigns. So whilst my previous...
Multipoint cutting (translational)
Science, Maths & Technology

Multipoint cutting (translational)

...article] Gear Hobbing [Images to demonstrate 'Multipoint cutting (translational)' – see article] Broaching [Images to demonstrate 'Multipoint cutting (translational)' – see article] Manufacture: Broaching Vertical or horizontal machining process, which pushes or pulls a specially shaped tool (the broach) through the workpiece. The broach is a tapered, multi-toothed...
Compression moulding
Science, Maths & Technology

Compression moulding

...articles is limited by the size and force capacity of the presses available. Weight of parts varies between 0.1 kg and 15 kg. The walls of compression moulded parts should be of uniform thickness and are in the range 3–6 mm. Thicker walls up to 12 mm can be moulded, but cure times are uneconomic. Very intricate articles with undercuts, small holes or side draws may not...
Transfer moulding
Science, Maths & Technology

Transfer moulding

...article)] 2. Mould fully closed. The compound has been plasticised by heat and pressure, and transferred from the chamber through the sprue, runners and gates to the cavity. [Diagram to illustrate transfer moulding (as per article)] 3. Mould fully open and ready for the operator to remove moulded parts and cull. [Diagram to illustrate transfer moulding (as per article)]...
Grinding
Science, Maths & Technology

Grinding

...article ] Manufacture: Selection of correct grinding wheel is essential to all processes and applications. Low stress grinding (LSG) uses wheel speeds of about 20 m s-1 and can usually be done on conventional grinding machines in any of the grinding modes. Most surface grinding operations use wheel speeds of 30–35 m s-1. High speed (high efficiency) grinding is a rapid...
Article 10 mins
Reaction injection moulding (RIM) and Reinforced reaction injection moulding (RRIM)
Science, Maths & Technology

Reaction injection moulding (RIM) and Reinforced reaction injection moulding (RRIM)

...article)] Schematic outline of mixing apparatus for RIM. Component A (polyol) and component B (isocyanate) are continuously circulated under a nitrogen blanket through the mixing head. Low molecular weight monomers polymerise in the mould. RRIM has reinforcement added to the monomer. [Diagram to illustrate the reaction injection moulding process (as per article)] Piston...
Centreless grinding
Science, Maths & Technology

Centreless grinding

...article ] Conventional internal grinding [Images to demonstrate 'Centreless grinding' - see article ] Principles of centreless grinding [Images to demonstrate 'Centreless grinding' - see article ] Principles of internal centreless grinding [Images to demonstrate 'Centreless grinding' - see article ] Centreless feed systems and applications Through feed​ [Images to...