Focused on meeting different necessities when it comes to molded rubber products, we have expanded our scope of manufacture and engineering services throughout our history.
We have the following production processes and we are capable of manufacturing molded products up to 2,000 mm in length.
- Compression Molding - In this process the rubber is preheated and then deposited in an open mold cavity, also heated. After, the cavity is closed, causing pressure to the material, which adopts the shape of the mold. That is, compression molding is performed due to an external pressure which forces the material (heated and liquid) to take the form of the mold containing it;
- Transfer Molding - In transfer molding the rubber is preheated in a separate container, known as pan, and then transferred to the mold cavity through a small hole, which we call door. In order to the rubber take shape, pressure is applied until it is expelled from the mold.
- Injection Molding - This process should be started with heated liquid rubber. After being inserted through the mold cavity, it is closed and pressed. Then cooled with water or specific liquids that extract the heat from the rubber inside. Then a high pressure is applied to the mold until the part solidifies and is expelled from it;
- Stamping - Stamping is characterized by producing parts through die cuts, performed by presses known as cutting and creasing. This process shapes the product through dies using laser cutting technology to ensure that the final part conforms to the planned dimensions.
PWe produce internally the compounds used in the manufacture of all our products, thus obtaining greater control over all the variables of its process, as well as faster development of new materials.
We are able to manufacture a wide range of elastomers, the most used today are:
Chlorosulfonated Polyethylene (CSM)
Etileno Propileno (EPDM)
Poly Isoprene, known as natural rubber, is one of those used in the production of rubber shock absorbers, mats and industrial applications. With its excellent adhesion to metals, it is the main element for parts with metallic grafts. Shows great resistance against cracks, breaks, abrasions and diluted acids. Used by Cronnos in virtually all segments served, such as industrial, agricultural, oil and gas and medium and heavy vehicles.
Silicone is a compound that forms rubber parts used in industries and in equipment working with high and low temperatures.
Known as SBR, Styrene-Butadiene is a synthetic rubber developed as a substitute for natural rubber. Like natural rubber, it is one of the most used in industrial applications. It has low deformation and high degree of sealing, standing out for several applications.
Fluorinated Rubber (FKM)
Employed in projects that require high resistance to petroleum derivatives, greases, oils and solvents, Nitrile makes it possible for vulcanized products in contact with combustible oils to maintain their designed physical properties. These properties may vary depending on the application, but may be summarized as tensile strength, abrasion resistance and dimensional stability.
Polyurethane in its rigid form provides extreme lightness to projects. Have great resistance and a good cost, Polyurethane offers solutions for a wide variety of projects.
We can work with 2D and 3D drawings with the respective specifications in various international standards, using compatible software to manipulate this information and files for the development of new products.
Our engineering department is trained to help the customer develop the best part in new projects always aiming low cost and the best technical solution.