This is a CNC machined mold. Locate a suitable CNC provider and get ready to produce numerous hangers.
Table of Contents
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Into the files, you will find:
- General drawings
- .IGES files
- .STEP files
- Parasolid files
- Solidworks editable file
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For the mold, two aluminum blocks measuring 430mm by 255mm by 25mm (16.93in by 10.04in by 0.98in) are required.
Contact a CNC machinist to fabricate the design files.
You can opt to include a cutout for a logo or keep it flat (both options are available for download).
For customization, modify the dimensions or other design aspects using the editable software file. Please share any innovations.
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Nozzle and Flange Connection Guide
Select the appropriate flange for your machine nozzle to connect it to the mold.
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Conical Nozzle: Use a flat 0.24-inch (6mm) flange with a bevel to receive the nozzle. Ensure it aligns with the screw heads through slots. It is not attached to the mold but pressed with a jack between the mold and nozzle.
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Screw Nozzle: Weld the pipe connector to the flange and secure the flange to the mold using closing screws.
Adjust the design as necessary to suit your requirements.
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If you decide to include logos in the mold, add the engraved sheet.
In this example, a metal sheet is engraved using acid etching, a process used in printing.
Trim and file the sheet to its final size, then fit it into the hole.
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Heat the machine, insert the plastic, and inject to create your hangers.
The final weight is approximately 81 grams (2.86 ounces).
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To facilitate the CNC mold production and injection molding process described, here are the essential components and resources:
Tools & Machinery
- CNC machining services (Thomasnet Directory)
- Hydraulic jack (for nozzle flange pressure)
- Metal trimming tools (files/shears for engraved sheets)
- Plastic injection molding machine
- Welding equipment (for screw nozzle flange)
Software
- CAD software (SolidWorks)
- File-compatible viewers for IGES/STEP/Parasolid (e.g., AutoCAD)
- Vector graphic software for logos (Adobe Illustrator)
Hardware
- Aluminum blocks (430×255×25mm / 16.93×10.04×0.98in)
- Conical nozzle flange (6mm thick with bevel)
- Screw nozzle flange with pipe connector
- Engraved metal sheet (acid-etched)
- Closing screws (flange attachment)
Materials
- 6061 or 7075 aluminum alloy blocks
- Injection-grade plastic pellets
- Acid solution for metal etching
- Stainless steel sheet (logo engraving)
- Fasteners (screws/pins)
Custom Tooling & Services
- CNC machinist (Colombian provider directory)
- Acid etching service (~~Local print shops~~)
- Custom flange fabrication (per nozzle type)
- Mold testing/validation service
- CAD modification specialists
All dimension modifications require updated SolidWorks files[1]. For Bogotá-specific machining options, consider industrial zones like Zona Franca de Bogotá[3]. Ensure aluminum blocks meet MIL-A-22771 standards for injection molds[2].
References
Articles
- CNC machines for efficiency in mold manufacturing - Thriam
- The ultimate guide to rear derailleur hangers | BMCR's blog
- CNC Basics: Easy Learning Guide
- Helpful Injection Molding Design Guidelines | GrabCAD Tutorials
- What are the CNC Techniques in Mold Making? - JTR China
- Essential Guide to Mold Making CNC: Techniques and Best Practices
Books
- ~~CNC Handbook | McGraw-Hill Education~~
- Fundamentals of CNC Machining - HAAS Technical Education Center
- The Homebrew Industrial Revolution
Papers
- The application of CNC machining technology in mechanical mold manufacturing (PDF)
- Mould design and manufacturing using computer technology (PDF)
YouTube
- Practical CAD Techniques for Composite Pattern/Mould Design
- How Wood Skateboard Molds are Made (CNC)
- Beginner To Advanced — How To Create a Mold— Part 1