Plastic & Sheet Metal Part Manufacturing Specifications

Plastic Part Specifications

Material Requirements for Plastic Parts

• Material specifications must align with flammability requirements and include details like density and regrind percentages.
• Parts in contact with potable water require specific materials and color specifications.
• Flammability ratings must be UL recognized unless approved by a safety engineer.

Plastic Part Thickness & Tolerances

• Material thickness must be dimensioned in models with tolerances noted as "TYP MATL THK."
• Existing material thickness notes should be revised as necessary.

Plastic Part Finish Standards

• Finish specifications must adhere to GE Appliances standards for painted or coated parts.

Plastic Part Color Matching

• Color matching must follow GE Appliances color standards, with gloss specifications if required.

Plastic Part Appearance Standards

• Parts must conform to visual appearance standards, with all surfaces specified as appearance surfaces.
• Ejector pin and gate locations require written approval before tooling.

Plastic Part Dimensional Accuracy

• Dimensions do not include flash; measurements must be taken at specified temperatures after stabilization.
• Parts must be free of foreign materials that could impair adhesion.

Plastic Part Regulatory & Safety

• Parts exposed to food or consumer contact must undergo toxicology reviews and meet specific regulatory requirements.
• Sharp edge requirements must be met for accessible edges, with CTQ requirements for compliance.

General Notes for Plastic Part Drawings

• Additional notes may be required based on engineering assessments.
• Drawings should not specify manufacturing or inspection processes and should avoid cross-referencing other documents.

Sheet Metal Part Specifications

Material Requirements for Sheet Metal Parts

• Material specifications must follow GE Appliances EMPIS, ASTM, ASW, and ANSI standards.
• For coil steel parts, no intermediate drawing is needed; PPAP is done using PO.
• If added to UL listing, material thickness is designated with CTQ.
• If no standard exists, a material trade name may be specified, though this is not preferred.

Sheet Metal Part Thickness

• Material thickness is specified in the model.

Sheet Metal Part Finish Standards

• Finish specifications are required for painted or coated parts.
• Examples of finish names include HIGH TEMP, LOW TEMP, and PORCELAIN ENAMEL.
• For stainless steel, specify brushed appearance and RA value.

Sheet Metal Part Color Matching

• Color must match GE Appliances color standards and may include gloss specifications.
• If stainless steel is used, only E9F9 is required; E9F2 is not needed.
• If color match is not required, specify accordingly.

Sheet Metal Part Appearance Standards

• Parts must conform to visual appearance standards documented in MCI.
• All surfaces should be specified as Appearance Surface B, C, or D.
• Requires

Sheet Metal Part Dimensional Accuracy

• Dimensions across formed planes must be measured from their formed tangencies.
• Dimensions may apply before coating or finishing, as specified in optional notes.

Sheet Metal Part Regulatory Compliance

• Parts referenced in regulatory approvals must not change without prior approval from the GE Appliances Program Manager.

General Notes for Sheet Metal Part Drawings

• Additional notes may be required based on engineering assessments.
• Drawings should not specify manufacturing or inspection processes.
• Cross-referencing other drawings or MBDs is not permitted.

Sheet Metal Specific Requirements

Sharp Edge Requirements

• Parts must meet sharp edge requirements per ETP 0900D001.
• Shear direction should be specified on drawings if applicable.
• Accessible edges must meet Level 1 sharp edge requirements.

Cleanliness Standards

• Parts must be visually clean and free from grease, oil, and foreign materials.

Deburring Procedures

• Parts must be deburred using vibratory or tumbling processes; no burrs allowed.
• Accessible edges on larger parts must also be deburred.

Carrier Strip Trim Standards

• Carrier strip trim mismatch must not exceed 0.020 for parts manufactured in progressive tools.

Toxicology Review for Sheet Metal

• Parts exposed to food or water must undergo toxicology review per GE Appliances procedures.

Odor and Taste Testing

• Parts in contact with food must meet odor and taste tests per GE Appliances standards.

Datum Feature Requirements

• Non-rigid parts must be restrained to specified datum features within geometric tolerances.