1. Material preparation
The production team confirms grade, nominal thickness, texture, color and surface orientation. Storage history matters because some conditions can require drying. SEKISUI KYDEX notes that drying is generally unnecessary for standard sheet except after humid storage, while process recommendations vary by grade.
2. Controlled heating
The objective is even temperature through the sheet, not simply a hot surface. The manufacturer’s thermoforming guidance recommends different forming ranges by thickness and warns against heating too quickly. Process settings must be developed for the actual oven, sheet grade and geometry.
3. Forming over the reference
Vacuum, pressure or matched forming brings the softened sheet into contact with the tool or controlled reference. SEKISUI KYDEX defines thermoforming as heating clamped sheet and using differential pressure to conform it to a mold; its fundamentals brief also explains how mold orientation influences wall distribution.
4. Cooling and demolding
The part remains supported until it is cool enough to resist distortion. Removing it too early can change geometry and repeatability. Cooling conditions belong in the process specification.
5. CNC or fixture-guided trimming
Excess material is removed and the final outline, slots and holes are produced. Hole location controls hardware alignment; the edge profile influences comfort, appearance and resistance to stress concentration.
6. Edge finishing and assembly
Edges are smoothed and polished to the agreed finish. Eyelets, posts, spacers, screws, clips, loops or mounting interfaces are installed to a defined configuration.
7. Final inspection
| Checkpoint | Typical review |
|---|---|
| Fit | Seating, clearance and contact points |
| Retention | Specified engagement and adjustment range |
| Dimensions | Outline, hole spacing and mounting geometry |
| Finish | Edges, surface, color and visible marks |
| Assembly | Hardware type, orientation and security |
Frequently asked questions
Is every thermoplastic formed at the same temperature?
No. Grade, thickness, equipment and geometry affect the validated process window.
Why is an approved sample important?
It turns subjective expectations about fit and finish into a physical production reference.