模具工业
模具工業
모구공업
DIE & MOUID INDUSTRY
2014年
5期
40-43,54
,共5页
王小新%张明磊%鲁韶磊%谢金林%王家昌
王小新%張明磊%魯韶磊%謝金林%王傢昌
왕소신%장명뢰%로소뢰%사금림%왕가창
外部气辅成型%快速热循环注射%缩痕%平板电视前壳
外部氣輔成型%快速熱循環註射%縮痕%平闆電視前殼
외부기보성형%쾌속열순배주사%축흔%평판전시전각
external gas-assisted injection molding%rapid heat cycle injection%sink mark%flat-panel TV front shell
以平板电视前壳上的螺柱结构为例,研究了外部气辅成型技术的密封和进气结构,获得了气辅参数对快速热循环高光泽塑件表面缩痕的影响规律,提出了消除塑件表面缩痕缺陷的有效方法。试验表明,在快速热循环注射成型技术中应用外部气辅成型工艺,通过采用有效的进气、密封结构以及合理的气辅工艺参数,能够很好地消除塑件在筋、柱部位对应表面上的缩痕缺陷,确保塑件外观平整无缩痕。
以平闆電視前殼上的螺柱結構為例,研究瞭外部氣輔成型技術的密封和進氣結構,穫得瞭氣輔參數對快速熱循環高光澤塑件錶麵縮痕的影響規律,提齣瞭消除塑件錶麵縮痕缺陷的有效方法。試驗錶明,在快速熱循環註射成型技術中應用外部氣輔成型工藝,通過採用有效的進氣、密封結構以及閤理的氣輔工藝參數,能夠很好地消除塑件在觔、柱部位對應錶麵上的縮痕缺陷,確保塑件外觀平整無縮痕。
이평판전시전각상적라주결구위례,연구료외부기보성형기술적밀봉화진기결구,획득료기보삼수대쾌속열순배고광택소건표면축흔적영향규률,제출료소제소건표면축흔결함적유효방법。시험표명,재쾌속열순배주사성형기술중응용외부기보성형공예,통과채용유효적진기、밀봉결구이급합리적기보공예삼수,능구흔호지소제소건재근、주부위대응표면상적축흔결함,학보소건외관평정무축흔。
In order to remove the sink mark defects on high gloss parts occurring in RHCM process, the sealed and gas intake structure of external gas-assisted injection molding (EGIM) was studied with the double-screw bolt structure of flat-panel TV front shell as ex-ample; and the effects of gas-assisted process parameters on sink marks of RHCM high-gloss plastic surface were achieved. Experimental results show that the sink mark of ribs and screws can be eliminated by using effective gas intake and sealed structure in mould and reasonable process parameters of external gas-assisted moulding process in RHCM. A high-gloss part with sound surface quality can be obtained.