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Weld Line
In manufacturing, the Weld line or Knit line or Meld line is the line where two Fluid dynamics, flow fronts meet when there is the inability of two or more flow fronts to "knit" together, or "welding, weld", during the molding (process), molding process. These lines usually occur around holes or obstructions and cause locally weak areas in the molded part. Knit lines are considered Injection molding#Molding defects, molding defects, and occur when the mold or/and material temperatures are set too low: thus the materials will be cold when they meet, so that they do not bond perfectly. This can cause a weak area in the part which can cause breakage when the part is under stress. Weld lines therefore occur during machine start-up, when equilibrium conditions have not been met. Mouldings made in this setting-up period must be rejected. There are many Computer Aided Engineering tools that are available that can predict where these areas could occur, but a skilled designer will be able ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manufacturing
Manufacturing is the creation or production of goods with the help of equipment, labor, machines, tools, and chemical or biological processing or formulation. It is the essence of the secondary sector of the economy. The term may refer to a range of human activity, from handicraft to high-tech, but it is most commonly applied to industrial design, in which raw materials from the primary sector are transformed into finished goods on a large scale. Such goods may be sold to other manufacturers for the production of other more complex products (such as aircraft, household appliances, furniture, sports equipment or automobiles), or distributed via the tertiary industry to end users and consumers (usually through wholesalers, who in turn sell to retailers, who then sell them to individual customers). Manufacturing engineering is the field of engineering that designs and optimizes the manufacturing process, or the steps through which raw materials are transformed i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
