Mould making
Mould making for GRP with epoxy resin or polyester resin
Materials and accessories for GRP mould making – we have everything you need!
Our company offers a wide range of materials and accessories for polyester or epoxy mould making. Modern moulds are now produced from glass fibre reinforced plastics, which are divided into two types: positive and negative moulds.
The craft of mold making with epoxy resin or mold making with polyester resin requires a delicate touch, but is not overly complicated. Start by applying a GKF fabric fiber to the pattern component and laminating it with a synthetic resin after applying a release agent. For best results, the material and room temperature should be around 20°C. A dust-free environment and extraction are also beneficial. Discover our wide range of model making and mold making materials and accessories.
- 80g Formula-Five Separating Wax€7.90 *0.08 kilogram | €98.75 / kilogram* Incl. VAT excl. Shipping
- Item bundleEpoxy Resin 4307 + Hardener 313from €6.20 *0.15 kilogram | €41.33 / kilogram* Incl. VAT excl. Shipping
- New item
- New itemFormula Five® Clean ´N Glaze 250g
RRP €9.90€6.90 *0.25 kilogram | €27.60 / kilogram* Incl. VAT excl. Shipping - Item bundleTear-off fabric tape 83 g/m² - 100 m roll - various widthsfrom €11.09 *100 meter | €0.11 / meter* Incl. VAT excl. Shipping
- New itemPartall® Paste #2 340g
RRP €13.90€11.30 *0.34 kilogram | €33.24 / kilogram* Incl. VAT excl. Shipping - New item
- 340g separating wax Formula-Five
RRP €18.80€14.40 *0.34 kilogram | €42.35 / kilogram* Incl. VAT excl. Shipping - Item bundle
- Item bundleGelcoat SG sprayable + Hardenerfrom €15.28 *1.02 kilogram | €14.98 / kilogram* Incl. VAT excl. Shipping
- Item bundleEpoxy Resin 4307 + Hardener 1203-Ffrom €15.50 *0.8 kilogram | €19.38 / kilogram* Incl. VAT excl. Shipping
- Item bundleEpoxy Resin 4307 + Hardener 140-Ffrom €15.50 *0.7 kilogram | €22.14 / kilogram* Incl. VAT excl. Shipping
- Item bundleEpoxy Resin 4307 + Hardener 1208-Ffrom €15.50 *0.75 kilogram | €20.67 / kilogram* Incl. VAT excl. Shipping
- Formula Five® Clean ´N Glaze 0,95 Liter€15.90 *0.95 liter | €16.74 / liter* Incl. VAT excl. Shipping
- 83 g/m² tear-away fabric tape, 50 mm wide - 200 m€28.91 *200 meter | €0.14 / meter* Incl. VAT excl. Shipping
Discover our range of materials and accessories for the ultimate mold making!
Modern molds are now made from glass fiber reinforced plastics. There are two types of molds—positive molds and negative molds. If you are handy, you can easily build a mold yourself. Take a look at our tips and tricks or feel free to contact us by phone to find out more. You'll be amazed by our range!
A mold should be constructed under optimal conditions, i.e., the material and room temperature should be approximately 20°C. A dust-free environment and possibly an extraction system should be available.
Making a mold—it's that easy!
Producing a mold requires some manual skill, but it is by no means difficult.
The importance of the master model: The master model serves as a template for impressions of negative or positive molds. It is important that the model has a smooth, dimensionally stable, and solvent-resistant surface that is not absorbent. It is equally important that the model shrinks in all dimensions to facilitate the direction of demolding.
Laminating refers to the combination of polyester resin and glass fiber mat or epoxy resin with glass filament fabric. The resulting material consisting of different layers is called laminate. Regardless of whether reinforcement fibers made of glass, carbon, or aramid are used, or what type of resin system is used, the basic principle remains the same.
We have carefully put together mold-making kits to help you with a variety of applications. Each kit has specific features that distinguish it from the others, such as the resin system (epoxy resin or polyester resin), the corresponding fabric fibers, the tools, and the accessories. Examples include release agents, fillers, color paste, and modeling wax.
Creating a mold - Correct number of layers
For a smaller mold, between 4 and 6 layers are usually sufficient. However, the number of layers required depends on the requirements for the finished mold. It is important to laminate the mold thicker than the finished part to ensure that drying of the finished part does not cause deformation of the mold due to shrinkage.
The last layer should be impregnated with only a small amount of resin and have a matte surface after drying. If the surface appears too shiny, too much resin has been applied. This can be counteracted with a tear-off cloth. After removing the tear-off cloth, the component is completely dust-free and clean. It leaves behind an even, rough surface structure that serves as an ideal substrate for further laminating, sealing, or bonding. This eliminates the tedious task of sanding and removing sanding dust.
A recommended curing time of at least 24 hours at 25°C is required. The use of plastic or wooden wedges makes it easier to remove the mold from the original mold. After demolding, it is recommended to trim the mold and, if necessary, polish it to a high gloss. It is advisable to use silicone-free polishing agents. Mold building gel coat can be used to repair minor surface defects. A strip of adhesive tape can help to smooth the surface.
