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射咀

射咀是安装在待注压料管的未端,是筒内熔融塑料注塑模的通道,它的咀口外部呈半圆球形,半径约3/4,或1/2,是用用向塑模引料接头注射模的,咀口直径的选择应比塑模引料接头的孔径约小0.02(0.5mm),否则主流道螯物就会留在引料接头套内。通常射咀出口径与注射成型机之注射量之间的关系如表:

注射量(安)

射咀出口径(时)

注射量(安)

射咀出口直径(时)

2

1/8

12

1/4

4-8

3/16

24

5/16

一部注射成型机通常备有各种长度和各种孔径不等射咀,可以随意更换使用,适应生产需求,射咀的种类很多,为了使它更有效地生产和特殊之要求,射咀有些是在咀口部分呈半球形,有些由平面形,有些在射咀内或处设有加热装置,如图:

 

 

 

 

 

 


 

                                                                                                                                                                                                                                                                                                                                                      

 
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