模具设计 矩形浇口设计.ppt

矩形邊緣澆口設計 rectangular edge gate design l = 0.5 0.75 mm w = 澆口寬度 ( mm ) gate width in mm a = 型腔表面積 ( mm2 ) surface area of cavity in mm2 n = 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, pmma, pa 0.9 for pvc h = n t h = 澆口厚度( gate thick. in mm ) t = 零件壁厚( wall thick. in mm ) w tl h 扇形澆口設計 fan gate design l= 1.3mm w= w= 澆口寬度 mm gate width in mm a= 型腔表面積 mm2 surface area of cavity in mm2 n= 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, pmma, pa 0.9 for pvc 澆口厚度 gate thick. in mm t= 零件壁厚 wall thick. in mm h1 = n t h2 = wh1/d 重疊式澆口設計 overlap gate design w= w= 澆口寬度 mm gate width in mm a= 型腔表面積 mm2 surface area of cavity in mm2 n= 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, pmma, pa 0.9 for pvc 澆口厚度 gate thick. in mm = nt 澆口長度 land length in mm t= 零件壁厚 wall thick. in mm l1 = 0.50.75l2 = h+( w/2 ) 凸耳澆口設計 tab gate design l= 0.50.75mm w= w= 澆口寬度 mm gate width in mm a= 型腔表面積 mm2 surface area of cavity in mm2 n= 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, pmma, pa 0.9 for pvc 澆口厚度 gate thick. in mm t= 零件壁厚 wall thick. in mm h1 = n th2 = 0.9 t 針點澆口設計 pin gate design l = 0.5 0.75 mm d = 澆口直徑( mm ) gate diameter in mm t = 零件壁厚( mm ) wall thick. in mm a = 型腔表面積 ( mm2 ) surface area of cavity in mm2 n = 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, pmma, pa 0.9 for pvc d l t 潛伏式澆口設計 subgate design w= w= 澆口寬度 mm gate width in mm a= 型腔表面積 mm2 surface area of cavity in mm2 n= 材料常數 material constant 0.6 for pe, ps 0.7 for pom, pc, pp 0.8 for ca, p