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When process risks are identified (WST) such as defect occurrence, new development, or 4M changes, inspection cycles are halved and sample quantities are doubled. Conversely, when stable mass production is maintained for more than 3 months without defects (BST), inspection cycles are doubled and quantities are halved.

WST

Defect occurrence / New development / 4M change → STD × 2 (Cycle 1/2, Quantity 2x)

BST

No defects maintained for 3+ months → STD × ½ (Cycle 2x, Quantity 1/2)

Quality Management System by Process

Mixing

We manage feedstock density, color, and uniformity from the start

Mixing Density

Sample from 5 locations, density deviation ±0.05% standard, record and move to next process

Mixing Color

Check against master photo and sample standard, record and move to next process

Injection

We evaluate molding quality based on two criteria: weight and appearance

Injection Weight

2-hour cycle, 1 per cavity measurement, ±0.05% standard, record and move to next process

Injection Appearance

No defects such as cracks, burr, deformation, foreign matter, record and move to next process

Debinding

We verify binder removal status through debinding rate and color

Debinding Rate

Sample 1 from each 6 zones, 97% standard, record and move to next process

Debinding Appearance

No cracks or foreign matter, gray-white color, no oxidation or carbonization, record and move to next process

Sintering

We finalize quality based on three criteria: dimensions, density, and appearance

Sintering Dimensions

Inspection standard dimension spec., sample 2 from each 6 zones, record and move to next process

Sintering Density

Random sample 2 from each 6 zones, only during development standard, record and move to next process

Sintering Appearance

No cracks or foreign matter, silver color, random sample 4 from each 6 zones, record and move to next process