Electrowriting & EHD printing

TL-Trinity

Precision micro/nanofiber direct-writing platform

Combine melt electrowriting, near-field solution direct writing and high-voltage electrospinning on one configurable platform. Study ordered fiber scaffolds and nanofiber membranes with coordinated motion, material delivery and process control.

Discuss your application Key specifications Download brochure (English PDF)

Platform & processes

Download brochure (English PDF)

Continuous fibers along a programmed path

Direct writing places a continuous micro- or nanofiber along a controlled toolpath to build ordered two- or three-dimensional structures. The same coordinate system supports changes between material systems, deposition geometries and processing modes.

Melt electrowriting

A high-voltage field draws the polymer melt as the stage places fibers along programmed paths. Solvent-free processing supports ordered 2D/3D scaffolds, with a stated fiber-diameter range of 1–100 μm.

Near-field solution direct writing

Write continuous lines and curves from solution or composite material systems. Glass needles span 1–45 μm in diameter, with liquid feeding from 0.01 to 99.9 mL/h.

High-voltage electrospinning

Produce dense nano- and microfiber membranes with single, side-by-side, coaxial or triaxial spinnerets. Choose the collector and channel arrangement for the required fiber architecture.

Materials, structures and research applications

Modules cover low-temperature biomaterials through high-temperature engineering polymers. Study ordered microfiber scaffolds or random nanofiber membranes on flat, tubular and curved surfaces, including multilayer structures. The platform supports exploratory research, process-window screening and shared research facilities.

Tissue engineering: tendon, cartilage, bone, nerve and muscle scaffolds.
Tubular structures: vascular, tracheal and conduit research.
Functional composites: piezoelectric, conductive, magnetic and particle-reinforced systems.
Wound care and drug delivery: porous patches and loaded structures.
Soft devices: liquid-crystal elastomers and programmable actuation.
Hybrid biomanufacturing: hydrogels, cells, electrospinning and 3D printing.

Application suitability and sample performance depend on the material, geometry, processing environment, post-processing and validation.

Printheads & delivery

Three melt printheads

Low-temperature melt head

Ambient–200°C. A 5 mL glass syringe, direct high-voltage connection and a choice of needle sizes.

Mid-temperature melt head

Ambient–300°C, with separate heating zones for the barrel and tip.

High-temperature melt head

Ambient–400°C, with a steel or ceramic barrel.

Hot-air shielding and pneumatic feeding

A coaxial hot-air shield provides 25–120°C outer-zone heating for high-temperature heads, reducing ambient effects and premature solidification. Pneumatic feed offers three pressure resolutions and can use an air pump or inert gas. Gas and cylinder arrangements follow the selected configuration.

Melt electrowriting

Near-field solution direct writing

Low-temperature hydrogel writing

The hydrogel head operates from ambient temperature to approximately 37°C, with optional nozzles. A 100 × 100 mm cooling stage reaches −4°C.

Rotating side-by-side spinneret

This optional head combines two solution streams with in-line twisting to study composite and multicomponent fibers. Rotational speed is digitally adjustable from 1 to 100 rpm.

Electrospinning spinneret configurations

Core–shell, side-by-side and multilayer fiber architectures use different channel and needle sets. The final set is specified for the chosen process.

Pneumatic writing with in-situ UV curing

This mode uses no high voltage. Adjustable pneumatic extrusion deposits photocurable material along the programmed path while four UV lamps cure it in situ. UV wavelength, power and lamp format can be configured.

Collectors & observation

Rotating drum

Ø76 × 150 mm. Rotary collection speed: 0–600 rpm.

X–Y flat-plate collector

200 × 200 mm collection plate.

Fine-mandrel collection

Ø1–6 mm mandrels; custom diameters are available.

Direct writing on curved surfaces

Optional surface scanning and following maintain the working distance while compensating the toolpath for hemispherical surfaces, tapered mandrels and balloon or tubular geometries. The tapered example shown is 10 cm long, with 5 cm sections of Ø5 mm and Ø8 mm.

Heated collector

Ambient to approximately 120°C, with an effective area of 180 × 180 mm.

Cooling stage

Optional cooling to −4°C over 100 × 100 mm. Anti-frost and anti-condensation operation is specified at 10°C.

Real-time jet observation

Adjustable focus helps document fiber drawing and jet behavior. Camera views and the observation arrangement support review of the printing process.

Motion & software

Precision motion architecture

A granite base supports X/Y linear motors and a Z servo drive. The upper X and lower Y axes each travel more than 180 mm at speeds up to 200 mm/s, with positioning accuracy of ±2 μm. Z travel exceeds 80 mm, with speeds up to 50 mm/s.

Four-channel programmable heating

Independent channels coordinate heating and collector temperature. Four-stage temperature ramps with individual dwell times help control the material’s thermal history. The software shows thermocouple status and provides individual output switching.

CH 01: ambient–150°C; four-stage temperature ramp
CH 02: collector-plate temperature control
CH 03: ambient–400°C
CH 04: ambient–300°C

Pressure and dual-channel liquid feed

Set inlet pressure on the touchscreen with selectable resolutions of 0.1, 0.01 or 0.001 MPa. Dual-channel liquid feeding covers 0.01–99.9 mL/h and accepts 10 mL or 20 mL syringes.

Two displays for process and motion control

Thermal and process settings remain visible alongside motion execution. View the toolpath, X/Y/Z/A positions and feed status while running G-code line by line. The control platform uses EdingCNC and CNC4.03 software.

Design files to executable toolpaths

Import 2D and 2.5D CAD geometry or 3D STL models. Convert photos, scans, sketches and digital drawings into paths. Generate parametric grids without a CAD model, then edit paths, speeds and print parameters. Assign speeds by geometry, region or segment before generating G-code.

Templates, simulation and batch printing

Grid and tubular templates generate geometry from structural and process parameters. Simulate and refine the path before printing. Parameter sweeps run multiple settings and geometries, a warm-up zone stabilizes flow before the target path starts, and stacked geometries can include a separate warm-up at each transition.

01Select grid or tube
02Set structure and process parameters
03Simulate and refine
04Export G-code and print

Scaffolds & samples

Tubular scaffold workflow

Parametric models generate axial or cross-hatched paths without manual line-by-line drafting. Rotation, fiber angle, spacing and layer count define the scaffold geometry and influence porosity, compliance and mechanical response.

Programmed paths, varied sample geometries

Application suitability and sample performance depend on the material, geometry, processing environment, post-processing and validation.

Fiber stacking and crossover microstructures

Inspect crossover nodes, fiber fusion and interlayer offsets to refine the process window. Scale bars belong to the individual micrographs.

Specifications & configuration

Parameter	Specification
Melt-head temperature options	Ambient to approximately 200 / 300 / 400°C
Dual-channel liquid feeding	0.01–99.9 mL/h
Liquid-feed syringe sizes	10 / 20 mL
Glass-needle diameter	1–45 μm
X/Y travel, each axis	>180 mm
Maximum X/Y speed	200 mm/s
X/Y positioning accuracy	±2 μm
Z travel / maximum speed	>80 mm / 50 mm/s
Rotating drum	Ø76 × 150 mm
X–Y flat-plate collector	200 × 200 mm
Fine-mandrel collection	Ø1–6 mm
Rotary collection speed	0–600 rpm
Heated collector: temperature / area	Ambient to approximately 120°C / 180 × 180 mm
Optional cooling: temperature / area	−4°C / 100 × 100 mm
Selectable pressure resolution	0.1 / 0.01 / 0.001 MPa

Final specifications follow the confirmed configuration. Discuss the material’s thermal history, target fiber scale, sample geometry, collection method, environment, post-processing and validation method before selecting modules.

Integrated safety functions

Grounding of enclosure, supply, pumps and collectors

These functions work alongside laboratory risk assessment, material-compatibility review and compliant operating procedures.

Configuration for your material and target structure

Core research platform

Three fiber-processing modes, a precision motion platform, standard printhead and flat-plate collector, control software and safety functions.

Options for the material

Low-, mid- or high-temperature melt heads, inert-gas feeding, a low-temperature hydrogel head and UV curing.

Options for the geometry

Rotating, heated or cooled collectors; curved-surface scanning and following; coaxial, side-by-side or triaxial spinnerets; and a rotating twisting head.

Accessories Resources

Customer equipment reference

TL-Trinity at a research institution

An equipment listing published on the customer’s own website.

Shenyang Institute of Automation, Chinese Academy of Sciences
China · Official Research Institute Equipment Page
TL-Trinity
The institute’s Micro/Nano Automation Laboratory describes an integrated electrospinning system combining melt electrowriting, solution near-field electrospinning and high-voltage electrospinning for direct writing and fiber or membrane preparation.
TONGLI identifies this customer system as TL-Trinity; the linked equipment page describes its three processing modes without naming the model.
View Institute Equipment Page (Chinese) ↗

Explore institutional and research records →

Tell us what you want to make.

Share your material, target structure and sample size. We can discuss a suitable platform and configuration.

Discuss your application

TL-Trinity

Platform & processes

Continuous fibers along a programmed path

Melt electrowriting

Near-field solution direct writing

High-voltage electrospinning

Materials, structures and research applications

Printheads & delivery

Three melt printheads

Low-temperature melt head

Mid-temperature melt head

High-temperature melt head

Hot-air shielding and pneumatic feeding

Melt electrowriting

Near-field solution direct writing

Low-temperature hydrogel writing

Rotating side-by-side spinneret

Electrospinning spinneret configurations

Pneumatic writing with in-situ UV curing

Collectors & observation

Rotating drum

X–Y flat-plate collector

Fine-mandrel collection

Direct writing on curved surfaces

Heated collector

Cooling stage

Real-time jet observation

Motion & software

Precision motion architecture

Four-channel programmable heating

Pressure and dual-channel liquid feed

Two displays for process and motion control

Design files to executable toolpaths

Templates, simulation and batch printing

Scaffolds & samples

Tubular scaffold workflow

Programmed paths, varied sample geometries

Fiber stacking and crossover microstructures

Specifications & configuration

Integrated safety functions

Configuration for your material and target structure

Core research platform

Options for the material

Options for the geometry

TL-Trinity at a research institution

Shenyang Institute of Automation, Chinese Academy of Sciences

Tell us what you want to make.