High speed finish machining

High Speed Finish Machining of High Pressure Laminate Wood Flooring... 

Most cemented-carbide tools are WC-based and have Co as the binder. Other carbide tool materials based on TiC having a Ni—Mo binder were developed primarily for high (>300 500 m/min) speed finish machining of steels and gray cast irons for automotive appHcations. 

The filaments are given a spin finish at the end of the spinning line (just after the glass transition is reached) by one of the many techniques, such as kiss-roll or nozzle spray. The finish is normally sprayed onto the filaments in high-speed spinning machines. Readers may refer to the literature for information on spin finish functions and its formulation [5]. 

The middle seventies saw the advent of high-speed injection molding. For thin wall parts, the production rate was limited by the hydraulic response of the machine. Nitrogen assist accumulators help inject the melt to reduce the overall cycle time. The early seventies also saw the introduction of co-injection molding. In this process a first melt is injected and cooled. The cavity is rotated and the second melt is injected to form the finished part. Usually both injections use the same material but a different color. The process is extensively used for calculator keys where the different colors eliminate a printing step. 

Specimens with gauge lengths as small as 12 mm can be accommodated with simultaneous measurement of length and thickness strains. All three principal strains may be measured within a gauge length of 26 mm. Specimens are carefully machined from oriented sheet by high speed routing to produce the necessary surface finish. 

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