This standard mainly stipulates inspection and test methods for various plastic products produced by injection molding. It is suitable for inspection of general injection products. This standard is for routine testing only. Particular requirements are subject to PARTSPEC.

 

Scorch marks (RURNS): Material decomposition caused by heat.
DISCOLORATION: Deviation from original color or color inconsistency.
FLOWMARKS: Stripes formed by flow of plastic parts resemble dry river channels.
Haze: A hazy spot or area formed on the surface of a clear material.
Pits (PITS): small pits or lack of material on the surface.
PROTRUSIONS: A point or surface higher than surface of surrounding material.
SCRATCHES: Small grooves or points or faces cut into surface of material.
SINKMARKS: Surface shrinkage or small sink marks.
SPECKS: Small particles or impurities on the surface or inside.
WELDLINES: Visible lines (marks) formed when front ends of cold material on plastic surface are welded together.
Measurement surface: surface to be observed. The first measurement surface: top or side surface that user often sees. Second measurement surface: side, corner or edge that user sees by accident or rarely sees. The third measurement surface: bottom surface of final assembly, assembly, part or surface of parts that are attached to each other during assembly.

2.1. This standard is based on the premise that it has no effect on function and is based on visual comparison, so it is not superior to limit model and individual special standards.
2.2. Normally, visually inspect at 30cm for 3 to 5 seconds. If a defect is found, move to 50cm and observe for 3 to 7 seconds. If it is difficult to see and defect is not obvious, it is OK.
2.3. Detection light source is fluorescent lamp of production factory, and visual acuity is above 0.7.
2.4. Observation angle: perpendicular to observed surface, an angle of 45 degrees up and down.

3.1 Surface (appearance) quality

1. Burr-any speaker holes, button holes, switch holes and matching holes of all moving parts must not have burrs. Built-in columns and bones should not affect assembly and function; burrs that exposed and possible exposed (such as: battery door) will affect safety, there should be no scratching sensation when touching it with your hands.
2. Deformation-deformation of bottom shell supported on the platform is not more than 0.3mm,  deformation of surface shell matching bottom shell supported on platform cannot be more than 0.3mm. Deformation of other plastic parts is acceptable so as not to affect assembly function. .
3. Dimensions—Dimensions are required to be connected to PARTSPEC. When there is no SPEC, refer to model and control according to following tolerance requirements:

4. Residual glue at nozzle
a). Nozzle level that is exposed and may be exposed (for example: battery door) that will affect appearance and safety standards should be flat, it should not be scratched if it meets safety standards.
b). There are assembly requirements, but it should not be exposed, remaining glue of nozzle that does not affect assembly should be controlled within 0.5mm and does not affect function.
c) There is no assembly requirement, no influence on function, no exposed nozzle, control within 1.5mm, fracture shape of nozzle can be in a free shape
This standard mainly stipulates inspection and test methods for various plastic products produced by injection molding. It is suitable for inspection of general injection products. This standard is for routine testing only. Particular requirements are subject to PARTSPEC.