MoldSim MCP Server

Give your AI assistant injection molding expertise.

An MCP (Model Context Protocol) server that gives AI assistants expert knowledge about injection molding simulation. Material properties, process validation, troubleshooting, and simulation specification generation — all available as tools.

Website: moldsim.com

Why

Setting up injection molding simulations (Moldflow, Moldex3D, Cadmould) requires deep knowledge: Cross-WLF viscosity models, Tait PVT data, processing windows, mesh strategies, DFM rules. This MCP server makes that knowledge available to any AI assistant that supports MCP.

Quick Start

Claude Code (recommended)

claude mcp add moldsim -- npx -y moldsim-mcp

That's it. Ask Claude about injection molding — it will automatically use MoldSim tools.

claude "What causes warpage in glass-filled nylon parts?"
claude "Give me the Cross-WLF parameters for PC/ABS"
claude "Validate: ABS at 245C melt, 60C mold, 2.5mm wall"

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%/Claude/claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "moldsim": {
      "command": "npx",
      "args": ["-y", "moldsim-mcp"]
    }
  }
}

From source

git clone https://github.com/kobzevvv/moldsim-mcp.git
cd moldsim-mcp
npm install
npm run build

Then point your MCP client to node dist/index.js.

Tools

query_simulation_knowledge

Free-text Q&A against the knowledge base. Ask about defects, DFM rules, mesh strategies, process optimization.

"Why is my part warping?" → causes, solutions, simulation checks
"What mesh type should I use?" → midplane vs dual-domain vs 3D guidance
"How to reduce cycle time?" → cooling optimization strategies

get_material_properties

Material property lookup. Returns Cross-WLF viscosity, Tait PVT, thermal, processing window, and mechanical data.

21 materials included: ABS, PP Homo, PP Copo, PA6, PA66, PA66-GF30, PC, PC/ABS, POM, HDPE, LDPE, PMMA, PBT, PBT-GF30, PET, PS, HIPS, TPU, SAN, ASA, PPE/PS

"PA66-GF30" → Cross-WLF coefficients, Tait PVT, processing window 275-310°C, fiber effects
"PC" → all properties or filter by group (viscosity, thermal, processing)

validate_process_parameters

Checks your process parameters against the material's processing window. Flags errors, warnings, and provides suggestions.

material: "ABS", melt_temp_C: 280 → ERROR: exceeds max 260°C, risk of degradation
material: "PA66", mold_temp_C: 40 → WARNING: below min 70°C, poor crystallization

generate_simulation_spec

Natural language → structured simulation specification. Describe the part and get back analysis types, mesh recommendations, process conditions, and expected outputs.

"Automotive dashboard panel in PC/ABS, 2.5mm wall, warpage analysis"
→ Fill+Pack+Cool+Warp sequence, dual-domain mesh, process conditions, expected outputs

compare_materials

Side-by-side comparison of 2-4 materials. Processing windows, thermal properties, mechanical data, and auto-generated key differences.

["abs-generic", "pc", "pa66-gf30"] → comparison table with stiffness, shrinkage, heat resistance diffs

generate_dfm_checklist

Design for Manufacturability checklist with pass/warn/fail ratings. Input part parameters and get 15+ DFM rule checks.

material: "ABS", wall: 2mm, rib: 1.5mm, draft: 0.5°
→ 16 checks: wall OK, rib WARN (75% ratio), draft WARN (below 1°), sink risk, venting...

Examples

Ask your AI assistant:

• "What are the Cross-WLF parameters for PA66-GF30?"
• "I'm getting sink marks on my PC housing — what should I check?"
• "Validate my process: ABS at 250°C melt, 70°C mold, 2mm wall"
• "Generate a simulation spec for a PP container with 1.5mm walls"
• "Compare ABS vs PC vs PA66-GF30 for an automotive connector"
• "Run a DFM check: 2mm wall, 1.5mm ribs, 0.5° draft in PC"
• "What mesh type should I use for a thick-walled POM gear (5mm)?"
• "How do I fix warpage in a glass-filled PA66 connector?"

Knowledge Coverage

Area	Coverage
Materials	21 grades with Cross-WLF, Tait PVT, thermal, mechanical, processing + comparison
Defects	Short shot, flash, sink marks, warpage, weld lines, burn marks, jetting, splay, voids, flow marks
Simulation	Mesh sensitivity, race tracking, cooling, overpacking, shear rate
Process	Cycle time, gate location, V/P switchover, degradation, crystallization, fiber orientation
DFM	Wall thickness, ribs, draft, radii, bosses, gating, tolerances, shrinkage, venting
Meshing	Midplane, dual-domain, 3D — when to use, element sizing, quality metrics

Compatible Software

MoldSim MCP provides software-agnostic knowledge that applies to all major injection molding simulation packages:

• Autodesk Moldflow — Adviser & Insight
• Moldex3D — all editions
• CADMOULD — Simcon
• SIGMASOFT — Virtual Molding
• SolidWorks Plastics

Tech Stack

• Runtime: Node.js, TypeScript
• Search: Qdrant vector database (local, embedded)
• Embeddings: HuggingFace transformers
• Protocol: Model Context Protocol (MCP)

License

MIT