Abstract
.The purpose of this project is to reduce production cost due to the injection of no full (Short) condition Top Flat PLAP.Through analysis of elements in plastic forming process of workpiece Top Flat PLAP is divided into 4 elements are set parameters (Condition) raw (Materials) mould (Mold) and injection (Machine) from the analysis.On the target and cause cause with chipped work most is the setting parameters (Condition) impurities by a test. Mixed raw materials pure (Virginal) along with the raw materials (raw material with the white fire burns).Test 6 times appear piece produced a black spot, causes almost all second cause จุดดำ is a machine (Machine) were tested by removing the screw out the fire cause.10 hours.The percentage of the black spot of the target decreased obviously. By setting the parameters (Condition) test by adjusting the parameters of the screw speed were found to be the target to produce waste out hours about.......(Mold) by the dirty plates cleaned so costly clean-up and after wash the outcome is much. Summarize the problem that the target was the black spot was the most raw materials (Materials) has been contaminated.
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