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蘭州聚丙烯(PP)料注塑產品該如何增亮度?

2022-04-23  來自: 蘭州市銀百合塑料制品有限公司 瀏覽次數:81

聚丙烯(PP)料注塑產品該如何增亮度?


一、注塑模具


1.若模具型腔加工不良,如有傷痕、微孔、磨損、粗糙等不足,勢必會反應到塑件上,使塑件光澤不良,對此,要精心加工模具,使型腔表面有較小的粗糙度,必要時可拋光鍍鉻。


2.若型腔表面有油污、水漬,或脫模劑使太多,會使塑件表面發暗、沒有光澤,對此,要及時清除油污和水漬,并限量使用脫模劑。


3.若塑件脫模斜度太小,脫模困難,或脫模時受力過大,使塑件表面光澤*佳,對此,要加大脫模斜度。


4.若模具排氣不良,過多氣體停留在模型內,也導致光澤不良,對此,要檢查和修正模具排氣系統。


5.若澆口或流道截面積過小或突然變化,熔體在其中流動時受剪力作用太大,呈湍流動態流動,導致光澤不良,對此,應適當加大澆口和流道截面積。


二、注塑工藝


1.若注射速度過偏小,塑件表面不密實,顯現光澤不良,對此,可適當提高注射速度。


2.對于厚壁塑件,如冷卻不充分,其表面會發毛,光澤偏暗,對此,應改善冷卻系統。


3.若保壓壓力不足,保壓時間偏短,使塑件密度不夠而光澤不良,對此,應增大保壓壓力和保壓時間。


5.若熔體溫度過低,使得流動性較差,易導致光澤不良,對此,應適當提高熔體溫度。


6.對于結晶樹脂,如PE、PP、POM等制作的塑件,如冷卻不均勻會導致光澤不良,對此,應改善冷卻系統,使之均勻冷卻。


7.若注射速度過大,而澆口截面積又過小,則澆品附近會發暗而光澤不良,對此,可適當降低注射速度和增大澆口截面積。

蘭州塑料桶,蘭州塑料化工桶,蘭州塑料方桶,甘肅塑料桶生產,蘭州塑料桶廠家

李經理:13893416023

電   話:0931-7351176

地   址:甘肅省蘭州市西固區清水街

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