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Casting Molds and Dies: 3D Printing STL Files

This collection gathers STL files for casting: molds for concrete and candles, letter and digit molds, dough presses, and tooling for metal work. Most of them are printed on a 3D printer and then filled with plaster, concrete, wax, resin or metal. It helps you find a mold shape quickly and see how the parts are split. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.

O texto desta coleção está em inglês; a busca funciona em qualquer idioma.

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O Polyzon monta esta coleção a partir dos resultados de busca dos sites conectados. Repetições e modelos sem prévia são removidos, correspondências fracas vão para o final e o restante segue a ordem da busca. Os modelos pertencem aos seus autores — confira os termos na página de cada modelo.

Regras de seleção: equipe editorial do Polyzon · Texto atualizado em 12/10/2026

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«Casting Molds and Dies: 3D Printing STL Files»

The models differ mainly in how they open and what they are filled with. Open one-part molds for concrete pots or candles are printed as a single shell, while letter and digit molds often come as a plate with several cavities. Dough presses are two-part tools with a plunger, and die casting items are closer to tooling drawings than to a printed mold.

When choosing, look at the wall thickness, the draft angle and how the model is divided into parts. Check whether the author lists the casting medium, the material and the print settings, and whether supports are needed for overhangs. Photos of real casts on the model page show how the surface and the seams come out.

To narrow the search, try both spellings, mold and mould, and add the medium you plan to pour: concrete, plaster, wax, resin or metal. Related terms such as two-part mold, mold box, sprue, vent or press die lead to other files. Searching by the object itself — pot, candle, letter, tile — often works better than searching by the word casting alone.

FAQ

Perguntas frequentes

What is the difference between a mold and a die in these files?
A mold is usually a printed shell or a two-part block that you fill by hand. A die is tooling for a machine process, so those files are often shown as drawings or as parts of a larger assembly.
Which material should I print a casting mold in?
It depends on the casting medium and on how much flex the mold needs. Authors often state the material and settings they used, so read that section before slicing.
How do I scale a mold to the part I want to cast?
Scaling changes the wall thickness and the fit between mold halves, not just the cavity size. Check the dimensions given on the model page and test the fit before pouring a full batch.
Can a printed mold be used more than once?
Reuse depends on the casting medium, the mold walls and how the halves are held together. Look for the author's notes on the intended number of pulls and on releasing the cast.
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