DBC-009

Pack: G_BASELINE Severity: major

Treat shut-offs and thin tool sections as durability problems, not just geometry details

Rule Card

Field	Value
Pack	G_BASELINE — DFM Baseline Codex
Title	Treat shut-offs and thin tool sections as durability problems, not just geometry details
Severity	major
Check logic	Hybrid
Applies to	CAD part
Inputs required	geometry_features, manual_context, part_bounding_box
Fix template	Open the shut-off angle, thicken the supporting steel, or relax the feature aspect ratio before tool fragility becomes the real problem.

Short Description

Shut-offs and deep narrow steel sections fail because they combine friction, flash risk, deflection, and heat concentration. If the tool section is too thin or too deep for its width, the mold becomes fragile and expensive to maintain.

When It Applies

This rule belongs to G_BASELINE (Shared across multiple manufacturing routes) and targets CAD part.

Evidence Profile

Input	Category
geometry_features	Geometry
manual_context	Manual context
part_bounding_box	Geometry

References

Reference	Type	Title
REF-BOOK-DFM-INJECTION	book	Design for Manufacturing Analysis: Injection Molding Review Guide

Compiled Threshold Metadata

Field	Value
shutoff_draft_deg_min	3.0
thin_tool_metal_in_min	0.05
feature_depth_to_width_max	3.0

Sources

• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\manifest.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\rule_library.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\references.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\process_classifier.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\overlays.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\roles.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\report_templates.json
• D:\02_Code\36_RapidDraft_DFMBenchmark_ExpertMode\server\dfm\ui_bindings.json