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1、? Rationalization of Mold Design ? MoldZen Technology Co., Ltd. ? Brian Tsai ? ? ? ?!?“#$ %?ABC D?EF? G?HIJD?K7L MNOPQRSJ?TU?VW?“X? ?TUYZ ?K?K ?K?_aHI ?b5?PQc?dJef?Kg 7hRSJ?TU ijk?lm89?n%?g A?9?2 I.?=? ?Aa?Aa: PMMA ?*B?*B?: 400 BB (?) TUTU: ?CA?CA, DEFGDEFG CAE ?H?H IZJK:;CAEL?MNOPQ? R? ST?U?VZRTU ?
2、W? ?W? /!?9?, XJe*Y? ?,-?78?A?. HI?k?, Z?| dDEF _?W? _?W? 1?a?g ( 5- 20 -) , /!?9?S“b )?ag*c, “de?) ?B?l?O fi ?:O ? fi ? fi ? ? Sprue ? Main Runner ? Part O Gate fl a? Cold Slug Well +? Branch Runner fi ?| fi ?| ?;ST?:O ?Aa?ABS ?R?*B?80 Ton ?G?G?G?G? LCD TV BezelLCD TV Bezel Material?ABS Application
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4、ting? y?y? Jetting O Jetting starting at the gate, spreading over the entire molded part y?y? y?(Jetting)?A: Y?fi fl (?Hyz?O)?E ?fi fl ?“? ;?O“”y?;?O“”y? 0? Poor ? Good ?O?“”y?O?“”y? 0? Poor ? Good O?iy?X?yO?iy?X?y O?g?l?=?H?(tab) O?“(fan)O? ?“SC)? y?“” ?y?dD?G; CAE L?H? PQa?)O?shear rate? ?)Aa?dS“?
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6、PMMA, PA 0.9 for PVC h = n t h = OE-( gate thick. in mm ) t = ?DE( wall thick. in mm ) W tL h 30 An W ? “O?“O? L= 1.3mm W= w= O?- mm gate width in mm A= ?cg? mm2 surface area of cavity in mm2 n= Aa? material constant 0.6 for PE, PS 0.7 for POM, PC, PP 0.8 for CA, PMMA, PA 0.9 for PVC OE- gate thick.
7、 in mm t= ?DE wall thick. in mm 30 ?n h1= n th2= wh1/D ? O? O? W= w= O?- mm gate width in mm A= ?cg? mm2 surface area of cavity in mm2 n= Aa? material constant 0.6 for PE, PS 0.7 for POM, PC, PP 0.8 for CA, PMMA, PA 0.9 for PVC OE- gate thick. in mm = nt O?- land length in mm t= ?DE wall thick. in m
8、m 30 ?n L1 = 0.50.75L2= h+( w/2 ) O?O? L= 0.50.75mm W= w= O?- mm gate width in mm A= ?cg? mm2 surface area of cavity in mm2 n= Aa? material constant 0.6 for PE, PS 0.7 for POM, PC, PP 0.8 for CA, PMMA, PA 0.9 for PVC OE- gate thick. in mm t= ?DE wall thick. in mm 30 ?n h1= n th2= 0.9 t ?|O?|O? L = 0
9、.5 0.75 mm d = O?( mm ) gate diameter in mm t = ?DE( mm ) wall thick. in mm A = ?cg? ( mm ) surface area of cavity in mm n = Aa? material constant 0.6 for PE, PS 0.7 for POM, PC, PP 0.8 for CA, PMMA, PA 0.9 for PVCd L t d0.206n tA 4 ? ? O? O? W= w= O?- mm gate width in mm A= ?cg? mm2 surface area of
10、 cavity in mm2 n= Aa? material constant 0.6 for PE, PS 0.7 for POM, PC, PP 0.8 for CA, PMMA, PA 0.9 for PVC OE- gate thick. in mm = nt t= ?DE wall thick. in mm 30 ?n 30? ? 15 25 fi ?PQ| fi ?PQ| ? ?ST?S? CAE L? ?H?P? ?SJ:;= O?1?E?“” ?R0D?g7?S?CAE ?H? O“ ?” Jetting ? fl ?fi ? fl ?fi ? ?-?n? :?2?“?7?-M
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