3DPTEK-J4000: 4-Meter Flaskless Sand Molds at a 2.5-Meter Price
Flaskless sand molds up to 4 meters — printed directly from CAD, no patterns, no size compromise. Patented boxless flexible-area technology makes a 4 m machine affordable at the price level of a 2.5 m system, and 6 / 8 / 10 m configurations are available on request.
When Your Castings Are Measured in Meters, Not Millimeters
The 3DPTEK-J4000 prints sand molds up to 4 meters directly from CAD. No patterns, no tooling, no size compromise — and a price that finally makes mega-format 3D printing practical.
The 4-Meter Breakthrough, Priced Like a 2.5-Meter Machine
Conventional mega-format 3D printers scale in price almost exponentially with build size. Boxless flexible-area forming changes that equation — the J4000 delivers genuine 4-meter mold printing at the investment level of a 2.5-meter system, with 6 / 8 / 10 m configurations available on request.
Six-Figure Pattern Costs
Large pattern sets for mega-castings cost $50,000–$200,000+ and take 8–16 weeks to machine. The J4000 eliminates these costs entirely.
Multi-Segment Mold Assembly
Traditional mega-casting molds need dozens of pattern segments. Every joint is a potential defect. The J4000 prints the complete mold as a single integrated assembly.
Months of Lead Time
Mega-casting projects routinely take 4–6 months from pattern order to first pour. With the J4000, foundries quote weeks instead of months.
What the 3DPTEK-J4000 Means for Your Foundry
Four numbers that change the business case for mega-casting mold production.
3DPTEK-J4000 — Four-Meter Capability in One Machine
Everything you need for mega-casting mold production on one platform — plus a clear upgrade path when your volumes outgrow it.
3DPTEK-J4000
- Actual build volume: 3,800 × 1,850 × 1,000 mm
- Build tank: 4,000 × 2,000 × 1,000 mm
- Boxless flexible-area printing up to 4 m (6/8/10 m on request)
- 16 printheads · 400 dpi
- Throughput: 130–360 L/h
- Layer thickness: 0.2–0.5 mm
- Rail-mounted dual build platforms, alternating printing
- Accuracy: ±0.5 mm (≤500 mm) / 0.1% (>500 mm)
3DPTEK-J4000Pro
- Forming volume: 4,000 × 2,500 × 1,500 mm
- Throughput: 1,090–1,744 L/h
- 17 printheads · 400 dpi
- Layer thickness: 0.5–0.8 mm
- Steel frame + heavy rail + powered roller
- 10+ tonnes of sand molds per build
Technical Specifications
Core parameters for production planning and facility preparation.
Facility Requirements
- Equipment Footprint 21,000 × 7,000 × 4,000 mm
- Equipment Weight ≈27 t
- Floor Load ≥5 t/m²
- Building Height ≥4.5 m
Power & Gas
- Power Supply 380VAC / 50Hz / 25KW, 3-phase 5-wire
- Gas Pressure 0.6–0.8 MPa
- Gas Flow ≥2.5 m³/min, clean & dry
Environment & Software
- Ambient Temp. 22–28 °C
- Ambient Humidity 30%–50%
- Control Software AFSWin3DP-L V1.0
- Data Format STL
Why Foundries Choose the 3DPTEK-J4000 for Mega-Castings
At the 4-meter scale, engineering maturity and support infrastructure matter most.
Flexible-Area Printing Technology
Patented boxless flexible-area forming technology breaks the rule that larger forming sizes mean exponentially higher equipment prices — a 4 m or larger machine is priced at the level of a 2.5 m machine. It prints molds up to 4 m in length and supports local printing for efficient material usage on smaller jobs.
Absolute Price Advantage
The J4000 delivers 4-meter capability at a fraction of the cost of European mega-format alternatives. Our customers confirm: the price-performance ratio is unmatched.
Dual-Platform Continuous Printing
Rail-mounted dual build platforms alternate between printing and cleaning, so the machine keeps producing while finished molds are removed — maximizing uptime.
Production-Proven Platform
J4000 systems are running in multiple smart manufacturing centers, producing molds for the largest castings in energy, marine, and industrial machinery.
Comprehensive Support
On-site installation, operator training, remote diagnostics, and guaranteed consumables supply. Our engineers support your mega-casting production.
Built for the Industries That Need Mega-Castings
The J4000 serves foundries and OEMs behind the world's largest castings. See how it fits your sector — and which machine matches your part size.
Energy & Power
Hydro turbine runners, wind hub castings, generator frames and steam turbine components.
Typical parts up to 4 m
Marine & Offshore
Ship propellers, rudder stocks, stern frames and large hull fittings cast in bronze or steel.
Typical parts up to 4 m
Industrial Machinery
Press frames, machine beds, gearbox housings and large structural castings for OEMs.
Typical parts 2–4 m
Automotive & Motorcycle
Engine blocks, cylinder heads and large tooling for prototype and pre-series castings.
Prototype tooling & batches
Aerospace & Defense
Large structural castings, engine housings and sand-cast prototype parts for qualification.
Prototype & low-volume
Art & Architecture
Oversize sculptures and architectural elements printed as single-piece sand molds.
Single-piece up to 4 mWhich J4000-series machine matches your parts?
Three quick sizing rules based on part length and production volume.
Application Cases
Mega-castings produced on J4000 systems in production environments.
Hydropower Turbine Runner Mold
Francis turbine runner sand mold — 3.8 m diameter. Complex 3D blade geometry printed as a single integrated mold. Traditional pattern would have required 24+ segments and 12 weeks.
Ship Propeller Mold
Large marine propeller sand mold — 3.2 m diameter. Printed as cope/drag assembly with integrated gating system. Lead time reduced from 10 weeks to 7 days.
Wind Turbine Hub Casting
Wind turbine main hub casting — 3.5 m. Single-piece sand mold replacing an 18-piece traditional pattern. Cast in ductile iron. Dimensional inspection passed on first article.
Industrial Press Frame
Large hydraulic press frame mold — 4 m. Complex internal ribbing impossible with traditional patterns. Single-piece print eliminated 30+ core boxes.
Traditional Pattern Machining vs. the 3DPTEK-J4000
The same mega-casting, two very different cost structures. See what the J4000 changes.
Capacity estimate: the J4000 forms 3,800 × 1,850 × 1,000 mm per build — roughly 7 m³ of sand per full tank. At the design throughput of 130–360 L/h, a full tank completes in about 20–54 hours (theoretical, before local-printing savings on smaller jobs). Typical mega-molds occupy 40–60% of the tank, so one large mold set is usually finished in 1–2 days.
What's Included with Every 3DPTEK-J4000
A complete mega-casting mold production capability, from site engineering to first production pour.
On-Site Installation & Commissioning
Full mechanical and electrical installation by our engineering team. Includes foundation inspection, laser alignment, and first-article build.
Operator Training (3–5 Days)
Hands-on training for your operators: machine operation, material handling, maintenance, and basic troubleshooting. Documentation in English.
12-Month Warranty + Remote Support
Comprehensive parts & labor warranty. Remote diagnostic access for rapid troubleshooting. Support engineers with direct J4000 production experience.
Complete Site Engineering Package
Foundation engineering (≥5 t/m²), utility layout (25KW power, 2.5 m³/min gas), ventilation design. Pre-installation site survey and construction guidance.
Application Engineering for Mega-Castings
Our engineers optimize print parameters and mold design for your specific large castings. Orientation, gating design, layer strategy — everything optimized for success at scale.
Consumables & Spare Parts Program
Guaranteed supply of coated sand, binders, and critical spare parts. We maintain regional spare parts inventories for rapid replenishment.
See Your Part Printed Before You Commit
The fastest way to de-risk a mega-casting decision: send us your part, we print a sample, and you judge quality for yourself.
Send Your Part
Upload your STL/STEP model. Our application engineers review printability and reply within 24 hours.
We Print & Inspect
We print your mold or sample part on a production J4000 and run dimensional checks against your model.
Cost & ROI Analysis
You receive the sample, a firm cost-per-mold quotation, and a payback projection for your application.
3DPTEK-J4000 FAQ
Straight answers on build size, materials, site preparation, delivery timelines, and seeing the J4000 in production.
The J4000 prints sand molds up to 4 meters in length using boxless flexible-area forming technology, with local printing supported for smaller jobs. Larger configurations of 6, 8 and 10 meters can be customized on request — and the breakthrough is that a 4 m+ machine is priced at the level of a 2.5 m machine.
The J4000's maximum build volume is 3,800 × 1,850 × 1,000 mm, inside a 4,000 × 2,000 × 1,000 mm build tank. Boxless flexible-area technology also supports local printing, so smaller jobs don't waste sand.
Quartz sand or ceramic (ceramsite) sand with furan or phenolic resin binders. Printed molds achieve tensile strength of 1.5–2.5 MPa and gas evolution of 8–15 ml/g at 850 °C.
The J4000 requires ≥5 t/m² floor load with engineered foundations, a building height of ≥4.5 m, 380VAC/50Hz/25KW three-phase power, and clean dry gas at 0.6–0.8 MPa (≥2.5 m³/min). We provide complete foundation drawings, utility specifications, and conduct pre-installation site surveys. Typical foundation preparation takes 4–8 weeks.
Standard delivery: 12–16 weeks. Installation and commissioning: 3–4 weeks. Foundation work can run in parallel with equipment manufacturing. Typical total timeline: 4–5 months.
Absolutely. We operate J4000 systems in multiple smart manufacturing centers across China. We encourage prospective customers to visit, see production firsthand, inspect mold and casting quality, and talk with our operators. Contact us to schedule a site visit.
Compare with other sand 3D printers
If your part size or batch volume is different, compare the build volumes across the range: 3DPTEK J1800, 3DPTEK J1800S, 3DPTEK J2500. Or browse the full sand 3D printers range.