Die Sinking EDM Machine

-- Steady & Reliable Manufacturer --

Brief Product Description

A die sinking EDM machine is built to reproduce complex three-dimensional forms in hardened tool steel and carbide. A shaped electrode is lowered into the workpiece under dielectric oil, and the sparks erode an exact mirror image of the electrode. This is the working method behind many plastic molds, forging impressions, and die-casting inserts, where the final geometry would be impractical to cut with rotating tools.

Purchasers are typically mold shops, die manufacturers, and subcontract toolrooms, along with distributors in regions where mold making is growing. Their decision usually turns on four points: usable table and tank size, power of the generator, the finish quality that the fine circuits can deliver, and the cost of keeping the machine running, including oil, filters, and electrodes.

Nantong New Era Technology Co., Ltd. manufactures die sinking EDM machines as part of a broader line of numerical control equipment developed over more than 20 years. OEM and ODM service covers branding, panel language, color, voltage, and accessory sets. We can arrange sample burns for evaluation, and standard models can be ordered as single units. Contact us with your drawings and finish requirements for a matched proposal.

Surface quality is usually what separates one die sinking machine from another in real use. Fine-finish circuits, clean dielectric, and stable gap control work together to produce uniform texture and reduce hand polishing. We are glad to discuss your target finish, show test pieces, and recommend a generator and filtration setup that suits your mold or die type, so the machine delivers consistent results from the first week of operation.

Best Suited ForHardened steel cavities and complex forms
Surface QualityFine circuits for smooth, uniform texture
Key ParametersTable, tank, current, finish range
Running CostOil, filters, electrodes, power
CustomizationBranding, language, voltage, accessories
Order TermsSample burn, single unit, export crate

Product Overview

A die sinking EDM machine shapes metal by controlled erosion rather than cutting. The electrode, usually graphite or copper, is machined to the inverse of the finished cavity and then advanced into the workpiece. Sparks across a narrow gap remove material in tiny increments, and the dielectric oil carries the debris away. The result is a cavity that matches the electrode with high fidelity, even in steel hardened above 60 HRC.

For B2B buyers, the key question is how consistently the machine reproduces results across many jobs. Surface texture, dimensional accuracy, and electrode wear should be predictable from one burn to the next. A machine with a stable generator, a rigid column, and a well-filtered tank will give that predictability, while a poorly matched one will force operators to adjust parameters again and again.

FinishFine texture via low-energy pulses
HardnessWorks on steel above 60 HRC
RepeatabilityStable generator and rigid column
UpkeepFilters, oil, graphite or copper

Main points for buyers

Compare achievable surface finish with the same material and electrode type
Check the table and tank size against your largest die block
Ask how the generator limits electrode wear during finishing
Confirm the filtration capacity and typical filter replacement cost
Look at the quality of cast parts, guideways, and ballscrews

What affects landed cost

A reliable comparison of die sinking EDM quotations includes the machine, tank, controller, and listed accessories. Beyond that, buyers should add crate and container charges, ocean or air freight, marine insurance, import duty, VAT, and local installation. Over the first year, oil, filters, and electrodes add running cost, and a good supplier will help estimate these so that the total outlay is clear.

Specification

Parameter	Specification
Machine Type	Die sinking EDM
Worktable Size	500 x 320 mm to 1300 x 800 mm
X / Y Travel	350 x 250 mm to 1100 x 700 mm
Z Stroke	250 mm to 500 mm
Max Workpiece Weight	600 kg to 3000 kg
Max Electrode Weight	60 kg to 300 kg
Max Machining Current	45 A to 120 A
Roughing Removal	Up to about 500 mm3/min, by model and material
Fine Finish	Down to about Ra 0.1 to 0.2 um
Electrode Wear	Low-wear roughing circuit available
Dielectric Tank	300 L to 1000 L
Filtration	Paper cartridge, multi-stage on larger models
Control	CNC with process library and orbit control
Power Supply	380 V, 3 phase, 50 Hz, adjustable by market

Application

Application Scenarios

Industry	Typical Parts	Buyer Focus
Injection Molds	Appliance housings, automotive trim cavities	Texture, finish, long-run stability
Forging	Closed-die impressions, preform dies	Heavy workpieces, roughing power
Die Casting	Inserts, cores, slider details	Hardness, accuracy, thermal stability
Rubber and Tire Molds	Pattern details, vent features	Fine detail, uniform finish

Target Customers

Mold FactoriesNeed steady results across many cavity jobs
Die ManufacturersNeed large table and strong roughing
Toolroom ContractorsNeed fast quoting and flexible setup
Regional DealersNeed standard models with solid service support

Suitable and Unsuitable Uses

Suitable Uses

Cavities requiring a consistent texture
Heavy die blocks with large footprints
High-hardness steel finished after heat treatment
Molds where polish time must be reduced

Unsuitable Uses

Fast bulk removal in soft metals
Simple through holes
Jobs where electrodes cannot be prepared
Non-conductive materials

Selection Guidance

1. Pick by die sizeList your biggest block and select a table, tank, and weight rating with margin.
2. Check finish needsIf the end product is highly polished, ask for fine-finish test pieces.
3. Estimate running costInclude oil, filters, and electrodes in your yearly budget.
4. Request referencesAsk about installed machines and typical service response.

Usage Notes

Keep the oil clean to protect finish and reduce arcing
Preheat for a stable temperature before final burns
Use fresh electrodes for the finishing pass when possible
Follow the recommended polarity for each electrode type
Inspect the machine level periodically
Keep fire protection equipment close and ready

Advantages

Low-energy finishing
A fine-finish generator circuit reduces the recast layer and gives a uniform texture, which lowers hand polishing time and improves mold surface consistency.
Strong roughing
High current capability removes the bulk of material quickly on large blocks, shortening the total cycle on forging and casting dies.
Large capacity
Generous table size and weight rating let you fix big mold blocks without special tooling, reducing handling risk and setup time.
Controlled wear
Roughing settings that limit electrode wear keep dimensions closer to target, which means fewer electrodes per cavity and lower consumable cost.
Rigid structure
Cast parts and precision guideways resist vibration during long burns, supporting accuracy on deep and detailed cavities.
Support documentation
Manuals, wiring diagrams, and spare parts lists are included, so maintenance can be planned in advance and downtime stays short.

Frequently Asked Questions

Q: What size die can this machine handle?
A: It depends on the model. Table sizes range from compact to large formats, and weight ratings reach several tons. Please send the die dimensions.

Q: Can the machine reach a polished finish?
A: Fine-finish circuits can reach very smooth surfaces, and the final result depends on electrode quality and material. We can show test pieces.

Q: How long do electrodes last?
A: Electrode life depends on material, parameters, and cavity shape. Low-wear settings help, and we can suggest a starting strategy.

Q: What running costs should I plan for?
A: Typical items include dielectric oil, filters, electrodes, electricity, and routine spare parts.