Phenol Direct Binding (PDB)

What is Phenol Direct Binding?

Phenol Direct Binding is an additive manufacturing technology developed by voxeljet, based on Binder Jetting technology. Whilst voxeljet’s machines can print high-quality plastic parts, where the company really shines is in short-run, detailed sand cast and core production. PDB works with an inorganic thermosetting resin, allowing a variety of different silica sand finenesses to be used (GS 14, GS 19, and GS 25, with a grain size of 140 µm, 190 µm, and 250 µm respectively) as well as Cerabeads.

3D printers from voxeljet can be used for the time- and cost-efficient production of sand molds and cores for metal casting. The molds are produced by applying a particle material in layers and selectively bonding it with a binder. Silica sand is used as the particulate material. The VX200 voxeljet systems are also used by Johnson Matthey to produce bespoke ceramic products with flexible geometries and feature sizes down to just 400 µm, using alumina-based technical ceramics.

A substantial advantage to many other available technologies is the ability of printing large-format parts with an effective building volume of 4,000 x 2,000 x 1,000 mm (L x W x H), as well as higher strength and recyclability compared to traditional methods of production.

Advantages Disadvantages
  • Largest size capabilities in the industry
  • High cost of systems
  • Unique use of phenolic binders
  • Limited marketing & communication support
  • Support for technical ceramics

How does PDB work?

Available PDB 3D printers:

Model  VX200, VX1000, VX2000, VX4000
Manufacturer  voxeljet
Price (approx.) $200,000-$1M
Technology  PDB (Binder Jetting)
Materials  Silica sand, Cerabeads, Alumina
Effective Build Volume  300 x 200 x 150 mm to 4000 x 2000 x 1000 mm
Layer Thickness  150-400 μm

You can find more information and the specifications for the machine here.

Further reading on voxeljet and PDB:

• voxeljet Down 18.2% in Q2, Optimistic on New HSS Systems and Service Revenues
• Johnson Matthey Opens New Ceramic 3D Printing Laboratory in Royston
• Ceramics, Breaking Through the Next 3D Printing Material Frontier / Part 1
• SmarTech Issues First Report on Traditional and Technical Ceramics AM

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