Uniform Electro
Mold for high-precision technical component in POM
4785
BU · Uniform Electro
Sectors · Technical parts
Technical plastic parts with critical functional tolerances.
Molds for structural components in engineering plastics: Nylon PA6/PA66, Polycarbonate. Critical functional tolerances, sealing surfaces, dimensional fits to ISO standards.
Introduction
Technical plastic parts are components where function outweighs appearance: bearings and bushings in POM, gears and structural supports in glass-fiber-reinforced PA6/PA66, load-bearing components in Polycarbonate and PBT. These components require functional dimensional tolerances, precise sealing surfaces and dimensional stability over time. Uniform has built hundreds of molds for technical parts destined for industrial machinery, automation, logistics and handling systems. Our expertise in machining quality steels and controlling the injection process ensures dimensionally stable parts even with highly crystalline polymers such as POM and PEEK.
Technical features
Dimensional fits and ISO functional tolerances
For technical parts with dimensional fits, controlling the polymer dimensional shrinkage is essential. UNIform simulates shrinkage with differential Moldflow analysis (transverse vs longitudinal shrinkage on crystalline materials such as POM and PA66+GF) and optimises the mold insert dimensions to compensate for post-ejection deformation. The injection process is fine-tuned during the first mold trial with samples measured by qualified external suppliers, and the dimensional control plan is updated before production approval. For O-ring seats and sealing surfaces we work with form tolerances (flatness, cylindricity) verified with dedicated measuring instruments.
Typical products
Typical products of the technical parts sector
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01
Gears and toothed wheels
Pinions, ring gears and wheels in PA6/PA66+GF and POM for transmission and handling systems.
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02
Bushings and bearings
Self-lubricating bushings and bushing holders in POM to reduce friction in industrial mechanisms.
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03
Impellers and rotating components
Impellers, rotors and stators in PA66+GF for pumps, motors and high-stress mechanical applications.
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04
Technical filters
Cyclone, mesh and cone filters in PP and PA for automotive, industrial and medical applications.
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05
Structural supports and brackets
Supports, brackets and mounts in PC and PA66+GF for industrial machinery and fastening systems.
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06
Valves, pumps and fluidic systems
Pistons, stems, chambers, cartridges and fittings in POM and PA66 for valves, dispensers and hydraulic systems.
Materials
POM, PA66+GF, PC, PBT: characteristics and process challenges.
Choosing the material for technical parts is as decisive as the mold design. POM (Acetal) is the reference for sliding components — bushings, gears, valves — thanks to its low friction coefficient and low water uptake; it requires high mold temperatures (80–100°C) and the utmost care against thermal degradation in stagnation zones. Glass-fiber-reinforced PA6 and PA66 deliver structural stiffness and thermal resistance for impellers, stators and load-bearing supports, but require mandatory granule pre-drying and careful management of the anisotropic shrinkage caused by the fiber. Polycarbonate offers impact resistance and dimensional stability for structural components but is sensitive to shear during injection and requires high mold temperatures to avoid residual stress. Glass-fiber-reinforced PBT stands out for its fast crystallization and excellent dimensional stability over repeated thermal cycles, with anisotropic shrinkage to be managed at the design stage.
Uniform knows the process challenges of these materials and addresses them from mold design through to the final mold trial.
Related molds
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FAQ
Frequently asked questions
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Do you build high-precision molds for Nylon toothed wheels?
Yes. We build molds for gears in PA6, PA66+GF and POM with a module down to 0.5 mm. Tooth profile machining is carried out on sinking EDM with dedicated electrodes and involute profile inspection on CMM. -
How do you manage dimensional shrinkage on POM Acetal for tight fits?
We simulate differential shrinkage with Moldflow and compensate the insert dimensions at the design stage. During the mold trial we measure the actual shrinkage on samples and adjust the mold dimensions if needed. The result is documented in the job control plan. -
Do you also offer molding, or do you only build the mold?
We build molds exclusively in steel and carry out their in-house testing before delivery. In exceptional cases, at the customer's request, we can offer a small production run of up to 5,000 parts.
Other business units
Uniform operates in three distinct markets. Explore the other business units.