There are currently four manufacturing processes for O-rings, each with its advantages and limitations.
The main method of manufacturing O-rings is molding. It is followed by:
- Extrusion and vulcanization of toric thread.
- Mechanization of joints from dollas.
Index
Continuous molding technology for O-Rings
A few years ago, a fourth manufacturing process was developed, the most unknown one, the continuous molding, which allows to manufacture O-rings without limitation in its maximum diameter. The joint is molded section by section until its full development is completed. While molding, the joint is vulcanized. The section of the joint will be that of the corresponding mold.
This manufacturing method can be used to obtain any type of O-ring or profile of interest. In the specific case of O-rings, The smallest joint that can be manufactured is 200 x 2.62 mm.
For circular section molds, the largest diameter section available is 60 mm.
Advantages of continuous molding for O-rings
Manufacturing tolerances
They are the same as those of a molded gasket (ISO 3601-1) and clearly lower than the tolerances of extruded gaskets.
Absence of discontinuities
Although the joints in extruded and vulcanized gaskets are of proven quality, the finishing is a handcrafted process and therefore subject to variations.
There are cases where, due to manufacturing limitations, O-rings have more than one vulcanization point.
With continuous molding, the finish is not only better, but also homogeneous around the perimeter of the joint, The system does not have any joints as such. This system makes it possible to manufacture O-rings without joints and as long as necessary.
Mechanical properties
O-rings manufactured by continuous molding exhibit a high significant improvement in tensile strength and remaining deformation resistance, The number of employees in the company has decreased by more than 10 percentage points.
Multiple geometries
Through continuous molding, static joints of triangular, rectangular, square cross-section, etc., can be produced. No restriction on geometry, If necessary, a specific mold can be developed.
If you want more information about these materials, call us at 938 633 277 and we will study together the most appropriate solution to your problem.
Get to know all our engineered sealing solutions at our catalog.