
In-house developed injection molds, plastic injection-molded parts and ready-to-install assemblies – manufactured in Germany and China.

Trentmann GmbH & Co. KG
Bad Iburg, Germany · Shenzhen, ChinaNew on Amplifa
About Trentmann
Trentmann GmbH & Co. KG is an owner-managed family business from Bad Iburg in the Osnabrück region with core competencies in toolmaking, plastic injection molding and assembly. The company designs and manufactures injection molds 100% in its own toolmaking operations at the Bad Iburg and Shenzhen (China) sites and produces technical plastic parts on machines with clamping forces of 50 to 460 tonnes – from standard to high-performance plastics, including overmolding of metal insert parts. The depth of production ranges from mold design through injection molding (also fully automated and under cleanroom conditions) to the assembly of ready-to-install assemblies with ultrasonic welding, printing and bonding. At the Shenzhen site, SMT assembly of printed circuit boards is also carried out with automated AOI inspection. Customers come from the automotive, white goods, food, bicycle, electronics, aerospace, medical, furniture and consumer sectors. With around 150 employees, more than 2,500 molds produced and over 48 million parts per year on around 9,750 m² of production space, Trentmann supplies customers in Germany, Europe and worldwide.
- Site
- Bad Iburg
- Processes
- Mold design, Toolmaking (injection molds), Tool maintenance / modification / repair, Mold relocation (takeover, commissioning, sampling), Technical injection molding, Injection molding with insert parts (overmolding of metal parts/contacts), Fully automated injection molding production with robotic removal, inspection and packaging, Cleanroom injection molding production
- Materials
- Standard plastics, High-performance plastics, Metal inserts/contacts (overmolded), Metal inserts/contacts, Printed circuit boards (PCB), Tool steel
- Certificates
- DIN EN ISO 9001:2015, KBA (quality management according to German/international road traffic law,, ISO 9001, KBA (bicycle lighting)
- Founded
- 1986
- Employees
- 150
- Industries
- Automotive, White goods, Food, Bicycle, Electronics, Aerospace
- 01
Project management
- 02
Mold design
- 03
Toolmaking (Germany & China)
- 04
Mold transfer/commissioning
- 05
Injection molding 50–460 t
- 06
SMT assembly & circuit board production (Shenzhen)
- 07
Assembly (ultrasonic welding, printing, bonding, screwdriving)
- 08
Quality assurance
- 09
Logistics & shipping
Materials & Processes
Standard plastics
Cost-efficient series production of technical injection-molded parts for a wide range of industry applications.
High-performance plastics
For demanding applications with increased requirements for temperature, strength and resistance.
Metal inserts/contacts
Overmolded inserts and contacts for plastic components with integrated functions.
Printed circuit boards (PCB)
SMT assembly and testing in in-house circuit board production at the Shenzhen site.
Tool steel
Precision injection molds with tight tolerances from in-house toolmaking.
Locations

Bad Iburg
DEHeadquarters: injection molding, mold maintenance, assembly, quality assurance, light laboratory, logistics center
- Materials
- Standard and high-performance plastics, insert parts
- 26 injection molding machines 50–460 t
- Fully automated production cell with six-axis robot
- Cleanroom production cell with injection molding machine
- CNC machines (mold maintenance)
- 3D scanner
- Color measuring device
- Light laboratory
- Assembly line
- Logistics center with own truck

Shenzhen
CNPlant China: injection molding, in-house toolmaking, assembly, SMT assembly and circuit board production
- Materials
- Standard and high-performance plastics, printed circuit boards
- 15 injection molding machines 60–450 t
- In-house toolmaking with CNC machines
- SMT production line with AOI inspection
- Assembly lines
Components & Products



Inside the production





Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Mold designEngineering | – | – | – | – | – |
| Toolmaking (injection molds)Toolmaking | tight tolerances | – | – | – | Steel |
| Tool maintenance / modification / repairToolmaking | – | – | – | – | – |
| Mold relocation (takeover, commissioning, sampling)Toolmaking | – | – | – | – | – |
| Technical injection moldingPlastics | – | – | – | – | Standard plastics, High-performance plastics |
| Injection molding with insert parts (overmolding of metal parts/contacts)Plastics | – | – | – | – | Plastic, Metal |
| Fully automated injection molding production with robotic removal, inspection and packagingPlastics | – | – | – | – | – |
| Cleanroom injection molding productionPlastics | – | – | – | – | – |
| Assembly of components (manual to fully automated)Assembly | – | – | – | – | Plastic, Metal, Electronics |
| Ultrasonic weldingJoining | – | – | – | – | Plastic |
| Printing (logos, scales, labels)Surface treatment | – | – | – | – | Plastic |
| BondingJoining | – | – | – | – | – |
| Screwdriving (assembly)Assembly | – | – | – | – | – |
| SMT assembly of printed circuit boardsElectronics manufacturing | – | – | – | – | PCB/printed circuit boards |
| AOI inspection (automated optical inspection) and functional testingTesting | – | – | – | – | – |
| Quality assurance: tactile and optical measurement, 3D scanning, color measurement, SPC,Testing | – | – | – | – | – |
| Light laboratory: measurement and optimization of light distribution and luminanceTesting | – | – | – | – | – |
| Design and development of bicycle lights and bicycle componentsEngineering | – | – | – | – | Plastic |
| Project managementEngineering | – | – | – | – | – |
| Logistics: warehousing, barcode scanning, packaging (Kanban, ESD-safe)Logistics | – | – | – | – | – |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Injection molding machines (50–460 t clamping force) | – | 26 | – | – | Bad Iburg, Germany |
| Injection molding machines (60–450 t clamping force) | – | 15 | – | – | Shenzhen, China |
| Injection molding machine in cleanroom production cell | – | – | – | 2019 | Bad Iburg |
| Fully automated production cell with six-axis robot | – | – | – | 2016 | Bad Iburg |
| SMT production line with automated AOI inspection | – | – | – | – | Shenzhen, China |
| CNC machines (toolmaking) | – | – | – | – | Germany and China |
| 3D scanner | – | – | – | 2022 | Bad Iburg |
| Color measuring device | – | – | – | 2024 | Bad Iburg |
| Light laboratory | – | – | – | 2022 | Bad Iburg |
| Assembly line | – | – | – | 2026 | Bad Iburg |
Additional services
Quality & Certification
Quality assurance includes tactile and optical measurement, 3D scanning, color measurement, statistical process control (SPC) as well as material testing and release of incoming raw materials. The company is certified according to DIN EN ISO 9001:2015 and according to KBA requirements for the manufacture of bicycle lighting (TÜV NORD).
| Evidence | Bad Iburg | Shenzhen |
|---|---|---|
| ISO 9001 | ||
| KBA (bicycle lighting) |