Plastic and composite precision machining

Machining engineering polymers and high-performance composites leaves no room for approximation. Blanks distort, tolerances are tight, and the materials themselves react to heat and cutting stress in ways metals never do. DEMGY Group operates a multi-axis CNC facility and a body of know-how built specifically around these materials, from prototype through volume production. The offer spans turning, milling and micro-machining across the full range of high-performance polymers and composites.

Machining processes

DEMGY Group brings the core material-removal techniques for plastics and composites under one roof. Each process has a dedicated page.

Turning

Applied to parts with an axis of revolution: the blank rotates while material is removed to size. It covers fluoropolymers for cryogenic and sealing applications as well as structural polymers.
→ See plastic turning

Milling

Handles parts without an axis of revolution, using a rotating cutting tool, including on complex geometries.
→ See plastic milling

Micro-machining and high precision

For miniaturized components and optical surface finishes, DEMGY Group drills down to 0.07 mm and holds extreme tolerances.
→ See micro-machining and precision machining
 

Equipment and capabilities

The facility is sized for demanding technical parts, from prototype to volume production:

• 27 CNC turning centers, 2 to 6 axes (HSM and ultra-HSM)
• 21 CNC milling centers, 3 to 6 axes (HSM and ultra-HSM)
• Machining of engineering polymers and high-temperature polymers, 2 to 6 axes
• Machining and trimming of thermoplastic (TP) and thermoset (TD) composites, 3 and 5 axes
• Maximum part size: 2,500 × 1,500 mm

Materials machined

The expertise covers engineering and high-performance polymers: PEEK, polyimides (PI), PEI, PPS, together with the fluoropolymers PTFE, filled PTFE, PCTFE/PTFCE, PFA, FEP, ETFE and PVDF. These materials are selected for their thermal, chemical and mechanical resistance in severe environments.

Parts for demanding environments

DEMGY Group machining serves sectors where part reliability is critical: aerospace, space, defense and industry. In the medical market, DEMGY Group acts as a partner, from design through the industrialization of components in engineering and biocompatible polymers.

Discuss a machining project

To assess the feasibility of a machined part in engineering polymer or composite, DEMGY Group teams can carry out a feasibility study and a technical review.

Contact DEMGY Group machining specialists →