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)

Terminal

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

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

Terminal

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):

config.json

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

From source

bash

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.

Code

"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

Code

"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.

Code

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.

Code

"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.

Code

["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.

Code

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