We can offer 3 Euromask® Solutions

Free Sampling: Pins and Projections with shoulder - Cataphoresis . Masking in industrial surface treatments

Methods and characteristics of masking systems for pins and projections with shoulders

The main masking methods for pins and protrusions with shoulder include masking caps and tubes.
These industrial masking products must ensure high-temperature resistance, chemical inertness, controlled elasticity, and uniform adhesion, even on complex geometries.
Equally important are reusability, dimensional accuracy, and ease of application and removal, to optimize production cycles.

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Free Sampling

he most suitable solution for your needs may depend on several factors: processing method, volumes, etc...

We can offer 3 Different solutions

Washer caps for holes, pins and threads.
CF - Washer caps 315°
Caps with internal rings and flange for protection of pins, holes and threads
FZC - Flanged easy use caps 315°C
Conecaps with flange for holes, pins and threads.
CCC - Conecaps with flange 315 °C

Further Information

The masking of pins and protrusions with shoulder is a critical phase in industrial surface treatment processes such as industrial painting, cataphoresis, anodizing, galvanizing, and sandblasting. Effective protection ensures the preservation of dimensional tolerances, threads, and functional surfaces, preventing rework and scrap.
In cataphoresis (e-coat), the main industrial masking methods include the use of masking plugs, protective caps, tapes, and adhesive films, depending on the areas to be excluded from the coating and the process conditions (immersion, electrical voltage, rinsing, curing).
Silicone plugs or other suitable materials are widely used to close through holes and blind holes, reducing bath penetration and preventing buildup or deposits in functional seats.
Protective caps allow external protection of pins, ends, threads, and cylindrical surfaces, keeping mating areas clean and limiting film thickness in critical zones.
Cataphoresis tapes and masking films are used to define flat areas, edges, and complex profiles with preformed elements.
Cataphoresis is a coating treatment by electrodeposition in which the workpiece is immersed in a bath and the coating is deposited under the action of a electric field, followed by rinsing and baking.
During the process, masking for cataphoresis is essential to protect functional surfaces, threads, holes, sealing seats, contact areas, and mating zones, preventing coating where it is not intended and avoiding assembly or conductivity/contact issues.
The masking products for cataphoresis must ensure stable performance during pretreatment (e.g., degreasing and conversion), immersion in the e-coat bath, rinsing, and oven curing; therefore, chemical resistance and thermal resistance are essential.
A high level of liquid penetration resistance (infiltration) is also required to keep masked areas protected even during immersion and handling, reducing defects and rework.
The conformability and elasticity of the materials facilitate application and removal on threads, edges, and variable geometries, improving repeatability in series production.
Another key requirement is clean removal without residues, to avoid contamination or film defects; where applicable, the reusability of plugs and caps contributes to cost optimization and process standardization.
An efficient masking solution is crucial for the reliability and final quality of the surface treatment.
Industrial masking makes it possible to protect threads, holes, functional surfaces, and mating areas.
Masking products for surface treatments include masking plugs, protective caps, adhesive dots, technical adhesive tapes, and masking tubing.
These devices must ensure high resistance to high temperatures.
Dimensional stability is essential during curing and drying cycles.
High chemical resistance to surface pre-treatments, such as degreasing and pickling, is also required.
The elasticity of the materials allows perfect adhesion even on complex geometries.
A key requirement is residue-free removal, in order to preserve the quality of the treatment.
The reusability of masking systems contributes to optimizing production costs.
Industrial surface treatments are essential processes for improving the protection, functionality, and durability of metal components.
Among the main surface treatment processes are powder coating, liquid coating, galvanizing, anodizing, cathodic electrodeposition (e-coating), sandblasting, and flame treatment.
These treatments provide corrosion resistance, electrical insulation, or surface conductivity, depending on the application.
During each industrial treatment, it is essential to define the areas that must not be treated.
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