CraftMold

STL formwork walls
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Formwork for silicone molds and casting

Prepare
printable
formwork from STL in minutes

Upload a model, set its position, and get ready formwork parts and files for 3D printing without manual assembly in Blender or CAD.

Try it with your STLUpload an STL and get the result

For silicone mold makers, candles, decor, resin, and small productionSave hours of manual work and get a consistent result.

Works in the browser
Nothing to install
No Blender or CAD
Automatic formwork
Export for 3D printing
Ready files for printing

What you get

From source STL to printable formwork parts

Source STL model before formwork preparation
01

Source STL model

Upload the master model and check whether it fits the workflow with a flat selected bottom.

Model and formwork parameter preview in the CraftMold interface
02

Preview and parameters

The browser shows the model, working side, dimensions, and future geometry before export.

Printable formwork wall sections around the STL model
03

Print files

Download the bottom and wall sections as STL/3MF, then prepare them in your usual slicer.

Capabilities

Silicone mold formwork without manual CAD assembly

STL checks before mold setup

Dimensions, triangle count, and problem areas are visible before part generation, so you can see whether the model fits a silicone mold from STL workflow.

Bottom and walls for the mold

Thicknesses, clearances, and wall splitting are handled in one workflow to produce printable mold formwork around the source model.

3D print the formwork

After checking the preview, download separate STL or 3MF formwork parts and prepare them for 3D printing in your usual slicer.

Not tied to Blender or CAD

It does not matter where the model was made: CraftMold works with most valid STL files within the current service limits. For the first pass, open the CraftMold lessons.

Why it saves time

Less manual assembly around the master model

Manually in CAD/Blender

  • build the bottom, walls, and clearances as separate operations;
  • check intersections and dimensions manually;
  • rework parts if the mold box does not assemble or print well.

In CraftMold

  • upload the STL and choose the working side;
  • set formwork parameters in one workflow;
  • inspect the preview and download separate STL/3MF parts.

To understand the available packs first, check CraftMold pricing.

Result example

Before: STL. After: printable bottom and wall sections

A detailed walkthrough is available in the lesson from STL to silicone mold formwork.

STL model before formwork generation
Before: source master model
Printable formwork bottom after generation
After: printable mold bottom
Printable formwork wall sections after generation
After: wall sections around the model

Use cases

Practical workflows for workshops and small batches

Candles and decor

Master models that need printed formwork before silicone pouring.

Figures and miniatures

Suitable STL files with a clear working side and an inspectable preview.

Resin casting

Fast fixture preparation for small objects and test molds.

3D printing for clients

When you need to show the path from model to slicer-ready parts faster.

Prototypes

Check the mold idea before manual CAD refinement.

DIY batches

A repeatable workflow for several similar STL models.

Fit boundaries

When CraftMold fits, and when CAD is the better tool

CraftMold shows model limits, builds printable parts, and leaves final control with you before download. The general workflow is covered in the guide to mold formwork software.

Output files

  • mold bottom and wall sections;
  • separate STL/3MF files for the slicer;
  • result preview before export.

Checks before build

The service shows dimensions, file limits, and geometry issues that can break generation or printing before you start the build.

Best suited for

Master models, figures, small batches, and DIY casting where you need silicone mold formwork around an STL.

When CAD is still needed

If the model has no suitable flat bottom, the file is broken, or custom engineering fixtures are required, the service stops with a clear reason.

Process

Clear steps instead of scattered operations

  1. Upload modelThe service reads the model and shows basic checks.
  2. Choose bottomSelect the working side and parameters for the future mold.
  3. Build wallsCraftMold calculates formwork sections around the model.
  4. Download STL/3MFCheck the preview and take the files for printing.

Control before printing

You see more than an export button

CraftMold interface with 3D preview, checks, and mold parameters
  • Model previewCheck orientation and the selected working side.
  • Dimensions and limitsReview STL size and basic limits before building.
  • Bottom and wallsInspect the result before downloading files.
  • Explicit stop reasonsIf the model does not fit, the workflow should stop with a clear reason.

FAQ

Short answers about pilot access and limits

Does CraftMold replace CAD or Blender?

No. It covers a repeatable printable formwork workflow for suitable STL files, but complex manual fixtures still need CAD.

Can I upload any STL?

No. You need a valid model within the file limit and with a suitable working side. Problem mesh files should stop with an explicit reason; see the questions about preparing STL files for silicone molds for details.

What do I get after generation?

Separate bottom and wall-section files in STL/3MF that you should inspect and prepare for printing in a slicer.