Polyjet:
Digital ABS


Polyjet - Digital ABS - Joystick
Polyjet - Digital ABS - optical device
Polyjet - Digital ABS - surgical device
Polyjet - Digital ABS - car model

Digital ABS simulates the mechanical and thermal properties of ABS. While FDM printed ABS has a rough surface and limited accuracy, digital ABS is printed in high-resolution, high-accuracy and with smooth surfaces. It is the strongest photopolymer we offer and is suitable for highly sophisticated functional prototypes.



Overview

Icon Technology

Technology

Polyjet

Icon Colors

Colors

White

Icon Max. size

Max. size

342 x 342 x 200 mm

Icon Pricing

Cost

$$$
(High)

Icon Lead Time

Lead Time

2 – 5 business days

Icon Accuracy

Accuracy

± 0,15% with a lower limit of 0,2 mm


Material-Details


Click on the topics of your interest.

Functional prototypes

While Digital ABS is more expensive than laser sintering, it outperforms it in terms of resolution and accuracy. The material has high mechanic strength and can be heat treated, to achieve heat resistance to up to 85°C.

Furthermore, the surface is of a very quality compared to most other additive technologies and can be smoothed to an extend that it can be coated, which is challenging with laser sinter parts.

Approximate price

  • Pricing for Polyjet is complex, for Digital ABS please request a manual quote.

Pricing factors

  • Material changes: When changing a material on the machine, a significant amount of material is discarded by cleaning the print heads and pipes. Digital ABS consists of two materials, which are dynamically mixed while printing, therefore Digital ABS always requires two material changes.
  • Material consumption: Polyjet is the 3D printing technology with the largest material cost among all plastics. Furthermore, for technological reasons, more material is used than the part requires, sometimes the material consumption is up to 8 times higher than the final part requires (e.g. 800 g material for a 100 g part).

Look & Feel

  • The surfaces are smooth, compared to most other 3D printing technologies. However, layer lines can be seen in z-axis, as well as in x-y axis. Only this technology has x-y lines, which are a result from the print head scraping some material from the surface while printing.
  • Surfaces without support material are glossy, surfaces with support material are rougher and somewhat dull.
  • The material is white, however, when printed thin (~ <= 1 mm), it is translucent.

Characteristics

  • Strongest photopolymer we offer, high mechanic strength.
  • When thin (<= 1 mm), the material is extremely flexible.

Tensile
Strength

55-60 MPa

Elongation
at break

25 – 40 %

Modulus
of Elasticity

2.600 – 3.000 MPa

Flexural
Strength

65-75 MPa


Vicat A

58 – 68 °C

Shore
hardness

85 – 87D

Symbol wall thickness

Wall thickness
The minimum wall thickness should be no less than 0,5 mm. Please note, the material is extremely flexible in thin structures. Thin parts won’t break, but are not rigid. For rigid structures, allow at least 1.5 mm wall thickness.

Symbol cavities

Cavities
Cavities can be realized as long as there is a min. 10 mm diameter escape hole to remove excess material. The support is a waxy material which needs to be scraped of. If the escape hole is too small, we cannot access the cavity and support material will remain inside the cavity. Accordingly,  for larger cavities, leave larger escape holes.

Symbol clearance gap

Clearance Gap
In case your file contains several shells, make sure to keep a clearance gap of min. 0,5 mm between the shells, otherwise they could be fused together.

Symbol resolution

Resolution
The minimal details size should not be smaller than 0,5 mm. The detail resolution of the material is a little less than Vero, but outperforms most other rapid prototyping materials.

Symbol interlocking parts

Interlocking parts
Interlocking parts can be printed as long as there is a clearance gap of at least 0.5 mm and there is sufficient space to remove the support material.

Symbol Bounding Box

Bounding Box
The maximum size of the part cannot exceed 342 x 342 x 200 mm.

Standard Finishing

  • Remove support material

Optional Finishing

  • Sanding
  • Bead blasting
  • Coating

In Polyjet 3D printing a print head is suspended above a build platform. The print head contains several nozzles as well as a UV lamp. During printing, the print head will sweep over the platform, ejecting tiny drops of a light-curing polymer on to the printing platform, and then almost immediately curing it with UV light. The platform then lowers between 16-32 microns (depending on the machine and setting) and the next layer of polymer is applied to the already hardened previous layer. This process continues until the object is completely 3D-printed. Overhanging sections are stabilized during the print by support material, which need to be removed after the print is completed.

Multijet Modeling (aka Polyjet) Printing Process. Quelle: Youtube.com / 3D-Systems