Otoplastics laboratory for custom-made earmolds, hearing protection and in-ear monitoring with digital 3D manufacturing
Scheinhardt
Kreuztal (Siegerland)New on Amplifa
About Scheinhardt
Scheinhardt is an owner-managed otoplastics laboratory in Kreuztal in the Siegerland region that has been manufacturing products related to hearing for over 25 years. The portfolio includes custom-made earmolds for hearing aid acousticians, custom hearing protection for work, music and leisure, as well as in-ear monitoring systems for musicians. In manufacturing, the company combines modern 3D technology – 3D scanners for digitizing ear impressions, DLP 3D printing, LPBF 3D printing with titanium and CNC milling – with skilled manual work such as drilling, grinding, engraving, polishing and lacquering. Biocompatible, medically certified materials are used: cast and printed acrylic, the thermoplastic elastomer THERMOtec, titanium and silicone in three hardness levels. All impression data is captured digitally and archived for 24 months, which enables fast re-manufacturing. Customers are primarily hearing care professionals, musicians and companies with noise protection needs; the EASY ORDER ordering platform is available to partner acousticians.
- Site
- Kreuztal
- Processes
- CNC milling (cast acrylic, pressure polymerization, post-processing), DLP 3D printing (stereolithography) – acrylic LP, DLP 3D printing (Castform) – THERMOtec, LPBF 3D printing – titanium earmolds, DLP 3D printing (Castform) – silicone earmolds, 3D scanning / digitization of ear impressions, Manual work: setting drill holes, grinding, engraving, polishing, lacquering, finishing, Manufacturing of earmolds, in-ear monitoring and hearing protection systems
- Materials
- Acrylic (cast, pressure polymerization polymer/monomer), Acrylic LP (printed, light-curing), THERMOtec (thermoplastic elastomer, Castform), Titanium (biocompatible), Silicone 25 Shore (soft), Silicone 40 Shore (medium, also buoyant), Silicone 60 Shore (hard), Acrylic (cast)
- Industries
- Hearing acoustics, Music/pro audio, Industrial noise protection/personal protective equipment, Hearing acoustics (hearing aid acousticians)
- 01
Digitization of the ear impression via 3D scanner
- 02
Order capture via the EASY ORDER platform
- 03
3D manufacturing (DLP printing, LPBF printing or CNC milling)
- 04
Manual work: setting drill holes, grinding, engraving, polishing, lacquering
- 05
Assembly of the earpieces
- 06
Individualization and shipping optimization
Materials & Processes
Acrylic (cast)
Cast acrylic cured under pressure polymerization, machined by CNC milling, highly shatter-resistant and available in many colors.
Acrylic LP (printed)
Light-curing polymer produced by DLP 3D printing with a smooth, homogeneous surface and tested biocompatibility.
THERMOtec (thermoelastic, Castform)
Becomes soft at body temperature, provides good sealing and a comfortable fit, suitable for allergy sufferers.
Titanium (biocompatible)
Manufactured by LPBF 3D printing, extremely shatter-resistant and lightweight, allowing filigree earmolds even for narrow ear canals.
Silicone (25, 40 and 60 Shore)
Elastomeric material with high wearing comfort, standard for in-ear monitoring, hearing protection and swim protection, available in many colors.
Locations
Kreuztal
DEOtoplastics laboratory / headquarters
- Materials
- Acrylic, acrylic LP, THERMOtec, titanium, silicone
- 3D scanner (impression digitization)
- DLP 3D printer
- LPBF 3D printer (titanium)
- CNC milling machine
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| CNC milling (cast acrylic, pressure polymerization, post-processing)Machining | – | – | – | – | Acrylic (cast) |
| DLP 3D printing (stereolithography) – acrylic LPAdditive | smooth, homogeneous surface | – | – | – | Acrylic LP (light-curing polymer) |
| DLP 3D printing (Castform) – THERMOtecAdditive | – | – | – | – | THERMOtec |
| LPBF 3D printing – titanium earmoldsAdditive | smooth, high-precision surface | – | – | – | Titanium |
| DLP 3D printing (Castform) – silicone earmoldsAdditive | – | – | – | – | Silicone 25 Shore, Silicone 40 Shore, Silicone 60 Shore |
| 3D scanning / digitization of ear impressionsEngineering | – | – | – | – | – |
| Manual work: setting drill holes, grinding, engraving, polishing, lacquering, finishingSurface | – | – | – | – | Acrylic, Silicone, THERMOtec, Titanium |
| Manufacturing of earmolds, in-ear monitoring and hearing protection systemsAssembly | – | – | – | – | Acrylic, Acrylic LP, THERMOtec, Titanium, Silicone |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 3D scanner (impression digitization) | – | – | – | – | Kreuztal |
| DLP 3D printer | – | – | – | – | Kreuztal |
| LPBF 3D printer (titanium) | – | – | – | – | Kreuztal |
| CNC milling machine | – | – | – | – | Kreuztal |
Additional services
History
Manufacturing in Kreuztal for over 25 years
- 2020
Copyright/relaunch of the website scheinhardt.de
- 2022
Update of the contact page (10.05.2022)
- 2026
Announced meeting at the EUHA Congress, Hanover trade fair (14.10.2026)