Lexicon of the manufacturing industry

• Bar extrusion

  The extrusion is one of the pressure-forming and is used to manufacture metallic profiles with different geometries. The process is used in the metal processing industry and in the construction industry, inter alia, for the production of hollow profiles. The extrusion allows the user to produce metallic profiles also with complex shapes such as irregular prismatic profiles. The technology is distinguished in particular by a high cost-effectiveness compared to alternative methods at low unit numbers. The extrusion is mainly used for aluminum components, but also for other materials.

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• Blacking

  Brunning is a surface process for producing a black protective layer on iron-containing surfaces. The aim of the bronification is primarily to protect against corrosion, whereby a decorative, antique appearance is frequently also achieved. The Breasting is defined in the standard DIN 50983 and is usually based on the immersion of the workpiece to be treated into an acidic or alkaline solution, the broaching agent. This process forms a black mixed oxide layer on the surface of the workpiece, which is also referred to as “stainless grate”. Black-oxideating is therefore not a coating, but a conversion of material.

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• Blow moulds

  The blow molding is a process for producing hollow bodies from thermoplastics. In this case, a preform is subjected to internal pressure and thereby pressed against the contours of a blowing tool, whereby it assumes the desired shape. The blow molding is one of the special methods of injection molding and has gained great importance in the production of bottles, containers and other plastic hollow bodies in the plastics processing industry. The method is distinguished in particular by the fact that the manufactured parts have comparatively small wall thicknesses. As a result, the material expenditure is low and the costs are kept low.

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