CVD Nano-Diamond Coated Stranding & Compacting Dies (Nano-Coated Wire Drawing Dies)

UKing Diamond’s CVD diamond-coated dies deliver ultra-long service life for conductor stranding, compacting, and high-surface-quality cable manufacturing — available factory-direct with custom bore specifications.

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Categories: Nano Wire Drawing Die

Description

Industrial Applications

Our CVD nano-diamond coating dies are high-efficiency alternatives to traditional tungsten carbide (TC) tools, widely applied in the global wire and cable industry for:

Conductor Stranding & Drawing: High-speed shaping of non-ferrous electric lines.
Conductor Compacting & Tight Pressing: Diameter reduction and flattening of overhead lines.
Premium Material Processing: Optimized for soft pure aluminum, high-conductivity copper, and heavy-duty aluminum alloy wire profiling.
High-Voltage (HV) Cable Production: Manufacturing core conductors for medium, high, and ultra-high voltage (UHV) power grids.

Performance Indicators	Uking CVD Nano-Diamond Dies	Standard Tungsten Carbide (TC) Dies	Industrial Impact
Surface Morphology	Continuous Nano-CVD Diamond	Microcrystalline Cobalt-Matrix	Seamless line drafting without micro-grooves
Diamond Grain Size	20 – 50 nm (Nano-scale)	N/A (Cobalt-bonded carbide)	Mirror finish, drastically reduced tool friction
Average Service Life	1,000+ KM (Continuous)	25 – 30 KM (Maximum)	35X+ Extended Lifespan, minimizes downtime
Friction Coefficient	Ultra-low (Near Natural Diamond)	High (Prone to thermal wear)	Smooth material flow, eliminates line tension spike
Common Failure Modes	None under standard lubrication	Scraping, Material Adhesion, Hole Ovality	Prevents production interruption and scrapped lots
Conductor Surface Quality	Zero Burrs, Flawless Edge Polish	Severe Burrs, Micro-scratches	Ensures passing grades in stringent corona tests

Product Details

1. Advanced Sintering & Nano-Surface Morphology

Uking’s stranding and compacting dies utilize advanced Chemical Vapor Deposition (CVD) technology to synthesis a uniform, ultra-dense nano-diamond composite coating directly inside the die core. The surface diamond features a precise grain size engineered at 20-50 nm. This nano-scale morphology creates a near-frictionless, mirror-polished inner channel that allows copper and aluminum conductors to glide smoothly at ultra-high drawing speeds without geometric deviation.

2. Resolving Material Adhesion & Ovality Phenomena

In standard aluminum and copper alloy stranding operations, traditional tungsten carbide (TC) dies fail quickly after just 25-30 km due to rapid thermal wear. This results in severe material adhesion (sticky aluminum/copper buildup), surface scratching, and hole-size expansion (ovality deformation), leading to immediate tool scrapping.

Uking’s CVD nano-diamond coating dies achieve a continuous production length of 1,000 km or more under identical equipment parameters. It completely eliminates material pickup, stabilizes core concentricity, and reduces the frequency of line changes by over 3500%.

3. Enhancing Cable Electrical Insulation & Withstand Voltage Pass Rates

Surface burrs generated during the compacting process are the fatal cause of electrical insulation failure in power cables. Conductor burrs trigger tip discharges (sharp-point discharges) inside the insulation layering of medium and high-voltage (MV/HV) cables, leading to catastrophic test failures.

By utilizing our ultra-low friction nano-diamond dies, the generation of surface burrs and line micro-scratches is completely suppressed. This breakthrough significantly minimizes partial discharge (PD) charges, ensures that special overhead conductors pass the high-voltage corona test, and drastically elevates your factory’s final with stand voltage test pass rate.

Key Features

1000KM+ Ultra-Long Campaign Life: Keeps your automated continuous stranding machinery running non-stop, eliminating costly tool-replacement downtime.
Anti-Adhesion Chemical Isotropism: Zero chemical affinity to soft aluminum and aluminum alloys, completely eliminating material scraping, surface galling, and metal buildup.
Partial Discharge (PD) Charge Reduction: Drastically smoothens the tight-pressed conductor profile, reducing the localized electric field stress in cables and ensuring premium dielectric safety.
Energy-Saving Lower Friction: The microscopic diamond-to-metal low friction coefficient lowers drawing bench power consumption, protects pull-blocks, and enhances equipment lifespan.
Seamless Hardware Retrofitting: Standard geometric control matching international stranding systems, perfectly replacing traditional carbide dies without machine modifications.

Struggling with material adhesion or failed high-voltage withstand tests caused by conductor burrs?

Traditional tungsten carbide dies fail rapidly within 25-30 km when processing soft aluminum or alloy wires, triggering severe sticky aluminum buildup and ovality. More critically, the resulting conductor burrs cause tip discharges, leading to catastrophic partial discharge (PD) test failures in your MV/HV cable lots.

Uking’s CVD nano-diamond coating dies guarantee a continuous campaign life of 1,000+ km, eliminating metal buildup and smoothing the tight-pressed profile to lower localized electric field stress.

Stop wasting money on premature tool scrapping. > Let our technical engineers optimize your compacting line parameters and help you secure a 100% pass rate in stringent corona and voltage tests.

FAQ

Q1: What is a nano-coated wire drawing die, and how does UKing Diamond apply the coating technology?

A: A nano-coated wire drawing die manufactured by UKing Diamond is a heavy-duty tungsten carbide (WC-Co) die whose internal bore surface is enhanced with a thin, ultra-dense layer of nano-crystalline diamond (NCD) or ultra-nano-crystalline diamond (UNCD) using advanced Chemical Vapor Deposition (CVD) technology. As a specialized CVD diamond-coated wire drawing die manufacturer, UKing Diamond precisely regulates the coating thickness from 5 to 20 μm. This advanced engineering successfully combines the shatter-proof shock toughness of a carbide substrate with the extreme surface hardness and low friction coefficient of diamond. Choosing to buy wire drawing dies with this nano-coating technology offers significantly improved die life and minimized drawing friction compared with conventional uncoated carbide tools.

Q2: Which wire materials are best suited when choosing to buy nano-coated wire drawing dies from a China manufacturer?

A: UKing Diamond‘s nano-coated wire drawing dies are highly recommended for high-abrasion ferrous and non-ferrous applications where extended tool life and strict dimensional stability are required. When you partner with a verified wire drawing die supplier like UKing Diamond, our nano-coated dies excel in processing:

High-Carbon Steel Wire: Tire cord wire, spring wire, steel rope wire, and prestressed steel wire.
Stainless Steel & Alloy Steel Wire: Medical wire, welding wire, mesh wire, and plated steel wire.
Copper & Aluminum Conductors: Precision conductor profiling, flattening, stranding, and tight compacting for high-voltage power cables and electrical grid applications.

Compared to standard carbide tools, UKing Diamond‘s nano-coated alternatives provide a significantly longer production campaign while maintaining excellent wire surface quality.

Q3: How long does a nano-coated wire drawing die last, and can UKing Diamond provide factory recoating services?

A: At UKing Diamond, nano-coated wire drawing dies typically achieve 3–5 times longer service life than conventional uncoated carbide dies, depending on wire material, lubrication conditions, reduction ratio, and drawing speed.

To maximize tooling utilization, worn nano-diamond coatings can be removed, the carbide substrate can be reconditioned and mirror-polished, and a fresh CVD nano-diamond coating can be deposited to restore original performance.

UKing Diamond also provides professional die refurbishment and recoating services, allowing carbide dies to be recoated multiple times when the substrate remains structurally sound. This helps reduce tooling costs and improve long-term production efficiency.