Molded silicone washers are produced in dedicated tooling for profiles that cannot be cut from flat silicone sheet. Typical features include sealing lips, grooves, stepped sections, locating ribs and controlled three-dimensional compression areas.
Molded silicone washers are produced in dedicated tooling for profiles that cannot be cut from flat silicone sheet. Typical features include sealing lips, grooves, stepped sections, locating ribs, and controlled three-dimensional compression areas.
Raised lips can be molded around critical contact areas to create a defined sealing interface within the washer profile.
Recessed grooves and molded channels can be integrated where the assembly requires controlled seating or compression space.
Stepped sections allow different heights or thicknesses to be formed within one molded silicone component.
Locating ribs and molded stops can help position the washer consistently during assembly.
Critical zones can be designed with defined section geometry to control how the silicone compresses in service.
Non-flat profiles can be developed from a 2D drawing, 3D model, or approved sample and reviewed for molding feasibility.
Critical profile dimensions, silicone specification, parting-line position, flash limits, and inspection requirements should be defined during drawing and tooling review.
| Product Specifications | |
|---|---|
| Product Type | Custom Molded Silicone Washer |
| Manufacturing Method | Dedicated molded tooling |
| Profile Type | Lips, grooves, steps, ribs, or other 3D features |
| Material | Silicone rubber |
| Hardness | Defined according to drawing and application requirements |
| Color | Custom color or approved reference color |
| Critical Dimensions | Defined on the customer drawing or approved sample |
| Parting Line | Position reviewed against sealing and assembly surfaces |
| Flash | Acceptance limit defined for critical functional areas |
| Post-Curing | Specified when required by the silicone compound or end-use requirement |
Tooling review focuses on profile geometry, cavity layout, parting-line position, venting, and the critical dimensions that must be controlled during molding.
Profile & Cavity Review
Parting Line & Flash Criteria
Molded silicone profiles should be reviewed against measurable acceptance points rather than general washer functions. Critical controls include parting line, flash, dimensions, compression behavior, and post-curing requirements.
Define where the mold parting line can appear so it does not interfere with critical sealing or mating surfaces.
Set acceptable flash limits around lips, grooves, holes, and other functional edges that affect fit or sealing.
Identify critical dimensions on the drawing so inspection focuses on profile height, lip thickness, groove size, and assembly interfaces.
Where the part remains compressed in service, define the silicone grade, hardness, compression condition, and required test criteria.
Post-curing can be specified when required by the selected silicone compound or end-use specification, with process conditions confirmed before production.
Custom molded silicone washers are developed from the part geometry and functional requirements. For flat 2D parts with uniform sheet thickness, choose die-cut silicone washers instead.
Confirm the 3D profile, critical dimensions, silicone specification, hardness, and functional surfaces.
Review cavity layout, parting-line location, venting, and molding feasibility around lips, grooves, steps, and ribs.
Evaluate initial molded parts for critical dimensions, surface condition, flash, fit, and profile consistency.
Use the approved drawing and sample criteria to inspect critical dimensions and visible molding conditions during batch production.
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