Our Processes

Today, several products are fully manufactured at our facility in Mariestad.

We have many years of experience in assembly work, and our employees possess unique expertise that is rare and difficult to find elsewhere.
Furthermore, we have the right equipment and adaptable processes to meet the wishes and requirements of those who entrust us with manufacturing their products.

At our facility in Mariestad, we perform bending and punching using a fully automated punching and bending system in the form of Salvagnini S4/P4.

We also perform slitting, which involves cutting rolled sheet metal coils to desired widths, which are then re-rolled.

• Max coil weight: 12 tons
• Max width: 1.5 m
• Steel thickness: 0.4-2.5 mm
• Uncoated and coated sheet metal

In conjunction with slitting and other sheet metal processing, we can offer leveling and cutting.

• Max coil weight: 6 tons
• Max width: 1000 mm

We have both the experience and expertise to perform welding, primarily spot welding.

Prodma has its own paint shop for both pre-treatment and powder coating as part of our manufacturing process.

We have extensive experience, expertise, and equipment for industrial powder coating. The facility at our factory in Mariestad is unique, and we are currently capable of advanced painting work included in the production process.

Proper pre-treatment is a prerequisite for a successful result. The pre-treatment consists of a multi-stage degreasing and nano-ceramic surface treatment for first-class adhesion.

Powder coating is carried out using friction and electrostatics. Prodma offers coating with robotic paint guns, and our specialty is coating thin layers, from 30μm.

We manufacture plastic sheets by extruding plastic granules. The plastic granules are heated and pressed between steel rollers to be transformed into plastic sheets with a high surface finish.

The material properties, color, and thickness of the plastic sheets can be varied according to the needs of the final product.

Extrusion of plastic sheets occurs with or without a gloss layer.

We can extrude plastic sheets with a width of up to 720 mm and a thickness from 1 to 5 mm.

Do not hesitate to contact us if you have questions regarding plastic extrusion,

Products formed by vacuum forming include the plastic part (inside) of freezer and refrigerator doors, as well as the inside of cabinets, but the process is also used to create various types of shaped plastic constructions such as tubs, containers, or door and cabinet interiors.

Vacuum forming combined with PUR foaming is particularly suitable for so-called sandwich constructions, exemplified by a refrigerator door where one side is sheet metal and the other (inside) is extruded and vacuum-formed plastic. These parts are held together by PUR foam, which both insulates and stabilizes the door.

The extruded plastic sheets are heated and stretched, then placed on a mold, also called a plug, where a vacuum is created to draw the plastic sheet down, forming it into the desired shape.

Stability and insulation with polyurethane foaming.

Polyurethane foaming provides extremely good insulation in sandwich constructions, for example, in a door consisting of sheet metal and a plastic casing. In addition to insulation, polyurethane (PUR) provides stability to the construction.

A selection of products we currently foam includes doors for refrigerators and freezers, medical cabinets, and drying cabinets. There is a plethora of possibilities for strong damped sandwich constructions and insulation applications.

As previously mentioned, polyurethane foaming provides rigidity to thin sheet metal sandwich constructions, but the foam also eliminates the risk of rattling by filling all voids where potentially moving parts exist.