SJ-1200 Sand 3D Printer for Foundries
The SJ-1200 prints sand molds and cores directly from CAD data. With two job boxes and a 1,200 × 1,200 × 600 mm build volume, it accommodates individual molds, multiple cores, and mixed build layouts without conventional patterns or core boxes.
Print Sand Molds and Cores Directly from CAD
The SJ-1200 turns print-ready casting data into sand molds and cores without first making a physical pattern or core box. Design changes remain in the digital file, allowing foundries to move between prototypes, replacement parts, one-off castings, and repeat builds without remaking dedicated tooling.
Build Capacity for Molds, Cores, and Mixed Layouts
The SJ-1200 provides a 1,200 × 1,200 × 600 mm build volume and uses two job boxes. Depending on part size and orientation, a job can contain a single mold or core, multiple smaller components, or a mixed layout.
- Build Volume
- 1,200 × 1,200 × 600 mm
- Job Box Configuration
- Two Job Boxes
Layer Thickness, Time per Full Layer, and Sand Part Accuracy
The SJ-1200 supports a 0.3–0.5 mm layer thickness range and uses a 4 × 1,024 printhead configuration to deposit binder across the prepared sand bed. Current specifications list 25 seconds per full layer and ±0.3 mm dimensional accuracy for printed sand molds and cores.
- Layer Thickness
- 0.3–0.5 mm
- Time per Full Layer*
- 25 sec
- Printed Sand Part Dimensional Accuracy*
- ±0.3 mm
- Printhead Configuration
- 4 × 1,024
Match Sand and Binder to the Casting Process
Current SJ-1200 specifications list silica sand, calcined sand, synthetic sand, and ceramic sand in the 50–200 mesh range, with a furan resin binder and hardener. The final material setup must be matched to the casting alloy, pouring temperature, surface requirements, gas evolution, strength, collapsibility, and the foundry’s process controls.
The system covers sand feeding, layer preparation, and controlled recovery of unbound sand. Reuse limits and fresh-sand additions must be validated for the selected sand, binder, and casting process.
- Listed Sand Types
- Silica / Calcined / Synthetic / Ceramic
- Particle Size Range
- 50–200 mesh
- Binder System
- Furan Resin + Hardener
Material Handling Path
Sand Feed
Layer Preparation
Printing
Within the validated reuse limit
Return path shown for unbound process sand only.
Print Complex Sand Molds and Cores with Fewer Tooling Constraints
Layer-by-layer printing allows the SJ-1200 to produce internal passages, undercuts, negative draft, and integrated core features without the same pattern-withdrawal and core-box-release constraints as conventional tooling. For suitable designs, multiple core segments can be evaluated for consolidation into fewer printed cores, reducing the number of assembly interfaces.
- 01
Internal Passages
Channels and cavities that are difficult to form with conventional tooling.
- 02
Undercuts & Negative Draft
Fewer restrictions from pattern withdrawal and core-box release.
- 03
Core Consolidation
Evaluate whether multiple segments can become fewer printed cores.
- 04
Part Identification
Add project or component markings where casting requirements allow.
Sand 3D Printing for Automotive and Industrial Castings
Foundries can evaluate the SJ-1200 for sand molds and cores used in automotive, pump and valve, heavy equipment, marine, and other industrial casting programs. Suitability depends on part geometry, build layout, the sand and binder system, alloy, pouring conditions, and required casting quality.
These are application areas for engineering review—not claims of completed SJ-1200 projects.
Automotive & EV Castings
Molds and cores for motor housings, transmission housings, manifolds, and prototype powertrain castings.
Pumps, Valves & Impellers
Molds and cores for pump housings, valve bodies, volutes, impellers, and complex flow passages.
Heavy Equipment & General Industry
Molds and cores for machinery housings, equipment components, and low-volume replacement castings.
Marine & Specialized Castings
Project-specific molds and cores for marine components and other specialized castings.
Connect the SJ-1200 to Your Foundry Workflow
The SJ-1200 fits into a broader foundry workflow rather than replacing it. Casting-data review and build preparation come before printing; sand removal, mold or core preparation, pouring, shakeout, inspection, and finishing follow according to the validated casting process.
Digital Preparation
Review Casting Data
Check orientation, shrinkage allowance, core strategy, gating, venting, and machining allowance.
Prepare and Nest the Build
Use Wukong software to slice the file, set print parameters, and nest compatible molds or cores within the build volume.
Printing & Part Removal
Prepare Sand and Print
Prepare each sand layer and print from the sliced build data.
Remove Unbound Sand
Recover unbound sand and remove the printed molds or cores using the approved handling method.
Foundry Operations
Complete Foundry Preparation
Complete any required curing, coating, assembly, gating, and inspection.
Pour, Shake Out and Finish
Pour the validated alloy, then cool, shake out, inspect, and finish the casting.
SJ-1200 Technical Specifications
Review the current SJ-1200 specifications below. Final system scope, utilities, site requirements, and service terms are confirmed for the quoted configuration and destination market.
Printing and Build
- Product Model
- Cprint 3D SJ-1200
- Primary Output
- Foundry sand molds and cores
- Job Box Configuration
- Two job boxes
- Build Volume
- 1,200 × 1,200 × 600 mm
- Layer Thickness
- 0.3–0.5 mm
- Time per Full Layer*
- 25 sec
- Printed Sand Part Dimensional Accuracy*
- ±0.3 mm
- Printhead Configuration
- 4 × 1,024
Materials and Software
- Listed Sand Types
- Silica / Calcined / Synthetic / Ceramic
- Particle Size Range
- 50–200 mesh
- Binder System
- Furan Resin + Hardener
- Build Preparation Software
- Wukong Slicing, Nesting and Build Preparation Software
- Control Operating System
- Windows 10 or later
Machine and Utilities
- Equipment Dimensions†
- 9 × 3.1 × 2.9 m
- Equipment Weight†
- 13 t
- Rated Power†
- 30 kW
- Power Supply†
- 380 V
Performance note: Performance figures apply only under qualified process and measurement conditions.
Supply note: Final system dimensions, weight, power demand, and electrical configuration must be confirmed for the quoted supply scope and destination market.
Project-Specific Site and Service Requirements
Site requirements, electrical configuration, shipping access, installation, training, warranty, spare parts, and support terms are project-specific. They are confirmed in the technical and commercial proposal for the destination market.
Site Planning
Shipping access / Floor loading and point loads / Service clearance / Compressed air / Ventilation and dust collection / Ambient conditions / Material-handling areas
Electrical Review
Phase / Frequency / Current / Transformer requirements / Destination-market compliance
Project Scope
Shipping split / Installation / Commissioning / Training / Warranty / Spare parts / On-site or remote support
Final installation planning must use the project-specific site-requirements package—not the webpage alone.
Frequently Asked Questions About the SJ-1200 Sand 3D Printer
Find concise answers about SJ-1200 output, build capacity, materials, full-layer time, sand-part accuracy, unbound-sand reuse, site planning, and project pricing.
The SJ-1200 prints foundry sand molds and cores from prepared digital casting data. These printed sand components continue into the foundry’s coating, assembly, pouring, shakeout, and finishing operations; the machine does not directly print the final metal casting.
The specified build volume is 1,200 × 1,200 × 600 mm, and the system uses two job boxes. Usable capacity for a particular job depends on geometry, orientation, spacing, sand-removal access, lifting points, and safe part removal.
Current specifications list silica, calcined, synthetic, and ceramic sands in a 50–200 mesh range, with a furan resin binder and hardener. Material compatibility and the production recipe must be validated for the selected alloy and casting process.
Current specifications list 25 seconds per full layer. Total build time depends on part height, layer thickness, sand and binder settings, geometry, build preparation, machine condition, and the qualified production profile. A job-specific estimate requires review of the CAD data.
The specified dimensional accuracy for printed sand molds and cores is ±0.3 mm under the applicable process and measurement conditions. Final casting tolerance is a separate result influenced by mold and core assembly, alloy shrinkage, pouring, cooling, heat treatment, and machining.
Unbound sand can be collected for controlled return to the material workflow. The allowable reused fraction, fresh-sand addition, and quality-control method must be validated for the selected sand, binder, and casting process. This does not imply complete recovery or eliminate process waste.
Provide the destination country, available electrical service, compressed air, ventilation and dust-collection conditions, access route, floor information, and planned material-handling area. Final requirements are issued in the project-specific site-planning package.
Pricing depends on the destination market, system configuration, material package, installation, training, and service scope. Submit the casting application, CAD file or drawing, production requirements, plant utilities, and requested delivery scope for a project-specific quotation.
Send Your CAD File for an SJ-1200 Project Review
Share your 3D model or drawing, mold or core dimensions, casting alloy, material preferences, production volume, destination, and available plant utilities. These inputs allow Cprint 3D to review printability, build arrangement, material requirements, site conditions, and the appropriate system scope.
Information That Helps Us Review Your Project
- 3D model or drawing
- Maximum mold or core dimensions
- Casting application and target alloy
- Preferred sand, particle size, and binder
- Target sand-part and final casting tolerances
- Required quantity or production volume
- Destination country and plant utilities
- Sample, site-planning, or quotation request