During a client's development project, Techné engineers provide advisory support: the profile is optimized based on the chosen manufacturing process. Seal design, material, and tolerances are reviewed with the client.
Several factors influence material and specific compound selection: elastomer type, crosslinking agents, hardness, compression set, etc. Each compound possesses unique characteristics. Depending on the application, fluids in contact, and desired mechanical properties, Techné suggests the suitable compound.
With its knowledge and mastery of processes, Techné positions seal plan in areas with minimal impact on sealing function. The execution plan is submitted to the client for approval.
Elastomeric components are toleranced based on the chosen process and in accordance with prevailing international standards. It should be noted that elastomers are flexible and deformable, rendering standards for plastic and metal parts inapplicable.
For drawing preparation, centered tolerances are recommended. Due to the molding process, mold fabrication, and material shrinkage, material savings cannot be achieved through eccentric tolerances.
Techné's technical service prefers to work with client's 3D drawings (centered dimensions) in STEP/STP format for tooling development.
Prototypes must meet the following criteria for machining:
Through its Chromex cutting division, Techné manufactures elastomeric sealing elements through automated cutting. Suited for flat gaskets, this process creates most 2D profiles, 1 to 15 mm thick, depending on material.
Techné offers prototypes created using a silicone mold obtained through stereolithography. Resin PU or silicone parts have mechanical properties akin to elastomers. This process handles complex 2D and 3D profiles.
Designed for compression processes, it features a reduced cavity count. Advantages include: