德马格注塑机工艺优化

德马格注塑机工艺优化内容摘要：

troke to achieve 9598% fill Take sixteeen consecutive mouldings and determine the standard deviation of the weights. Print out: Page 21 Dosing Profiles Page 50 Process Statistics What has happened to the Dosing Stop position? 16 STEP FIVE RESULTS Insert actual values in the relevant boxes Mean value Range min max Weight without holding pressure Weight with holding pressure Percentage fill % Standard deviation (16 shots) g Melt cushion (mean and range) Dosing time (mean and range) Screw stop position (mean and range) Injection time (mean and range) Peak injection pressure, P inj. max Injection pressure at changeover, PN press. Changeover stroke 17 STEP SIX Optimise depression Find the depression speed which gives best screw stroke and melt cushion consistency. Set a depression stroke of 5mm. Check that you still achieve 9598% fill. Take sixteeen consecutive mouldings and determine the standard deviation of the weights. Print out: Page 21 Dosing Profiles Page 50 Process Statistics What has happened to the screw stop position? What is happening to the check ring? 18 STEP SIX RESULTS Insert actual values in the relevant boxes Mean value Range min max Weight without holding pressure Weight with holding pressure Percentage fill % Standard deviation (16 shots) g Melt cushion (mean and range) Dosing time (mean and range) Screw stop position (mean and range) Injection time (mean and range) Peak injection pressure, P inj. max Injection pressure at changeover, PN press. Changeover stroke 19 STEP SEVEN Optimise holding pressure profile Use the Holding Profile page to set a holding pressure profile which ensures a smooth transition from injection to the holding pressure phase and use a high enough pressure to pack the part properly. Add a step which reduces holding pressure gradually to zero. Take sixteeen consecutive mouldings and determine the standard deviation of the weights. Print out: Page 24 MWE Page 27 Holding Profile Page 50 Process Statistics Why do you need a smooth transition from injection to holding pressure? Why bother to reduce the pressure gradually if the gate has already frozen? 20 STEP SEVEN RESULTS Insert actual values in the relevant boxes Mean value Range min max Weight without holding pressure Weight with holding pressure Percentage fill。