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Moulding Qualtiy Defects

FB

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Across
1.Circular pattern around gate caused by hot gas
4.another name for burrs
8.Thin mica like layers formed in part wall
9.outline of feature on a surface
10.Raised or layered zone on surface of the part
11.Part deformed by turbulent flow of material
12.Small lines on the backside of core pins or windows in parts
15.when a pin pulls the material back
16.Lack of material, injection speed or pressure too low, mold too cold, lack of gas vents
17.Directionally "off tone" wavy lines or patterns
Down
2.Excess water in the granules, excessive temperatures in barrel can cause it
3.Empty space within part (Air pocket)
5.String like remnant from previous shot transfer in new shot
6.another name for knit line
7.contaminates
13.Localized depression (In thicker zones)
14.Uneven shrinking between areas of the part can cause it

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