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Appearance judgment standard of plastic shell connector of precision injection molding shell gb9286-98 and IEC and ISO

Time:2020-05-31 07:56:32 Hits: 418
Light scratch: it is not obvious through visual inspection, no concave convex feeling on fingernail touch, and no scratch on material body.


Deep scratch: it is obvious through visual inspection. The fingernail touch has concave convex feeling, which will hurt the body of the material.


Shrinkage: when the plastic cools and hardens, it will cause shrinkage depression of the plastic part, which can be seen by naked eyes, usually related to the wall thickness of the plastic part or beer plastic,


If shrinkage will affect the size or function of the product, the defect is the main one. If shrinkage will only affect the appearance


The influence is secondary.


Water inclusion pattern: when the molten plastic enters the mold cavity, it can not be fully fused, resulting in a linear melting line on the surface of the rubber part, which can be seen by the naked eye.


Fusion mark: the linear mark formed at the material flow fusion joint.


Matte: the phenomenon that the surface gloss of the product is reduced due to improper injection process.


Top white and top mark: the phenomenon of local whiteness or bulge on the external surface of the top bar's ejection part due to the process or mold


Not full (lack of material): due to process reasons, the part of the product is not fully formed.


Uneven wall thickness: the phenomenon that the local wall thickness of the product changes due to process reasons.


Warpage: the warpage of product shape caused by temperature stress or material orientation.


Foggy: the blurring, indistinct and lustrous phenomenon on the surface of transparent plastic.


Bubble: the visible air bubble inside the expected rubber part due to process reasons.


Phifeng: burr on plastic parts after gate residue is removed.


Repair: local covering with paint due to damage of mold layer.


Foreign matter: different types of things (such as dust, iron chips, etc.) adhered to the surface of parts.


Particle: the surface color particles formed due to incomplete melting of materials.


Parting line: the visible linear trace or redundant material formed on the part surface along the closing line.


Knife scratch: the scratch marks left by the removal of the plastic blade.


Mold stamp: in the process of mold injection molding, the trace formed on the surface of the part is consistent with the position and size of the mold.


5.2 acceptable range of product appearance defects


S: Defect area mm2 n: defect quantity L: defect length mm H: defect depth mm D: defect diameter mm


W: Defect width mm

外观缺陷类型

表面大小

合格范围

Ⅰ级表面

Ⅱ级表面

Ⅲ级表面

浅划痕

不限

不允许

L≤10、W≤0.5、N≤2

不限制

深划痕

不限

不允许

不允许

L≤10、W≤0.5、N≤2

缩水

不限

不允许

H≤0.1、D≤2、N≤2

不限制

夹水纹

不限

不允许

L≤6、N≤2

不限制

融接痕

不限

不允许

W≤0.5、N≤2

不限制

无光泽

不限

不允许

不允许

不限制

顶白顶痕

不限

不允许

D≤1.5、H≤0.5、N≤2

不限制

未充满

不限

不允许

不允许

不允许

壁厚不均

不限

不允许

不允许

不允许

翘曲

不限

翘曲≤0.5mm面板翘曲≤0.8mm

雾状

不限

不允许

S≤5、N≤2

不限制

气泡

不限

不允许

D≤0.3、N≤2

D≤1.0、N≤4

披锋

不限

不允许

不刮手

不刮手

修补

不限

不允许

L≤10、W≤0.5、N≤2

L≤30、W≤0.5、N≤2

异物

不限

不允许

D≤1.5、H≤0.5、N≤2

不限制

颗粒

0~6400mm2

不允许

S≤0.08、N≤2

S≤0.2、N≤2

6400~30000mm2

不允许

S≤0.2、N≤2

S≤0.3、N≤3

30000~∞mm2

不允许

S≤0.3、N≤3

S≤0.7、N≤3

分模线

不限

不允许

两个面段差不超过0.1

两个面段差不超过0.2

刀刮痕

不限

不允许

深度小于0.5切均匀

不限制

模具印

不限

不允许

不限制

不限制

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