CAD/CAM


 

Scanners: Zirkonzahn s600, Dental Wings, 3Shape D900, MEDIT Identica Blue

 

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Scanner Zirkonzahn S600

Scanner DWOS

Scanner 3Shape D900

Scanner MEDIT Identica Blue

 


 

Milling machines: Zirkonzahn m5,  CORiTEC 750i

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Zirkonzahn m5 is a 5-axis dental milling machine designed for dry machining of materials used in prosthetics and, in particular, zirconium oxide. The device is designed to produce dental crowns, bridges and much more complex geometries such as prosthetic fasteners. Zirkonzahn can be described as a dynamic, precise and extremely efficient multitasking system which ensures the highest precision and quality of processing zirconium and other prosthetic materials.

CORiTEC 750i is an unrivaled 5-axis dental milling machine designed for dry or wet machining of all the most important materials used in prosthetics, in particular machining of metal. This machine owes its unique properties to  its prototype used for industrial purpose. The 750i milling machine ensures the highest standards of precision and dynamics thanks to the granite base for all axes and the use of the latest generation of linear drives. The device is designed to produce crowns and bridges and more complex geometries such as prosthetic fasteners or tooth models. CORiTEC 750i can be described as a dynamic, precise and extremely efficient multitasking production system designed for medium and large prosthetic laboratories We focus on the precision and quality of processing metal and other prosthetic materials.

Dental Lab is one of the few laboratories that  has obtained the manufacturer’s certificate for certified ZirkonZahn laboratories [http://zirkonzahn.com.pl/zirkonzahn/laboratoria-certyfikowane/]

Logo Laboratorium certyfikowanego ZirkonZahn

Check the latest research confirming the bending strength of Zirkonzahn Prettau Zirconia and Prettau Anterior Zirconia.

Badania wytrzymałości na Uniwersytecie Pensylwania - 2016r.


3D printers: EOS M100

 

DMLS technology – production of complex shapes using selective melting of metal powders

DMLS technology, i.e. Direct Metal Laser Sintering is a 3D printing technology for metal elements that has been developed for over 20 years by EOS. The idea of prototyping metal parts using the DMLS method has evolved into a developed production technology offering unique design freedom for engineers.

The repeatability of strength parameters of the created elements as well as the number of industrial and medical production implementations significantly differentiate the DMLS method from similar SLM or LC solutions. The idea behind this technology is to build complex shapes from hard-to-machine materials that can not be produced by casting methods.

The most popular materials used in the DMLS method are titanium alloys, tool steels, cobalt and chromium super alloys, heat-resistant nickel alloys, aluminum alloy and surgical stainless steels. Implementation of such metals as tungsten, copper, gold and other precious metals is also being carried out. The branches of industry using DMLS technology for the production of final parts are mainly aviation, space industry, automotive, dentistry, implantology and the tool industry concerning plastics processing and casting.

The advantages of DMLS technology

  • design of complex geometries with truss structures for offloading the parts used in the aerospace industry
  • building complex cooling channels that follow the shape of the detail in the injection molds inserts (conformal cooling), which significantly shortens the injection cycle time and impoves the quality of plastic details
  • building crowns and dental bridges from the biocompatible certified CoCrMo alloy
  • creating integrated parts of hard-processed materials, i.e. nickel or tungsten alloys, in order to reduce the number of elements included in a given component
  • production of titanium bone implants with truss structures facilitating osseointegration

Functioning principle of DMLS

The functioning principle of DMLS machines is based on the application of precisely composed metal powder layers with a blade on the working platform. the next step is the selective melting of other layers of the produced element with a laser beam operating in the near infrared radiation (wavelength of approximately 1064 nm). The 3D printing process takes place in a protective atmosphere, mainly using argon or nitrogen, depending on the reactivity class of the alloy. For example, aluminum and titanium alloys are processedunder an argon atmosphere, while less reactive tool steels as well as cobalt and chromium alloys – under a nitrogen atmosphere.

 

 Szkic poglądowy - zasada działania DMLS

 

Schematic functioning principle of DMLS technology

 

The key aspect of the 3D printing process is the need for continuous cleaning of the shielding gas from impurities arising during melting. These are often impurities with a porous surface which may contain residual amounts of metal oxides and trapped gas bubbles. If the contamination falls on the melted surface and then is covered with another layer of powder, it can be embedded in the material structure causing inclusions of a different density than the alloying material. The quality of the laser layer remelting can therefore be estimated mainly on the basis of the amount of such defects on the cross-sectional area of ​​the formed material. If the filtration system, the laser exposure profile and the shielding gas flow over the powder surface is not optimized, a large number of defects in the material structure can cause significant weakness. In applications, for example in the field of medicine, molding or aviation, this type of weakening of the structure should not happen.

The general functioning principle of DMLS, SLM (Selective Laser Melting) and LC (Laser Cusing) technologies is similar. The variety of technology naming results from the registration of names as trademarks. Each SLM or LC machine manufacturer takes into account limitations to patent rights and pays a patent fee to EOS (as the original creator of this method) while using several own solutions that distinguish one technology option from another. An example is the use of a rubber spreading powder in SLM machines instead of a steel or ceramic blade used in DMLS technology. In the Polish technical nomenclature, the word “sintering” in the name DMLS is a misleading phrase, because in reality the laser completely fuses the powdered metal, while the influence of heat is visible in the deeper layers.

Why should you buy EOS DMLS machines ?

EOS is a company that sets the direction for the development of laser remelting technology for metal powders and plastics. It takes into account the quality and the number of installed systems, industrial implementations and organizational structure. Since 1994 DMLS technology is transforming from rapid prototyping technology to production technology for very demanding elements. Due to the long-term cooperation of the EOS brand with its key clients from many industries, DMLS technology is the most commonly implemented solution for the production of metal components using 3D printing.

The M280 and M290 machines produce components for GE’s and UTC’s aircraft engines. In addition, other aviation companies such as MTU and RolsRoyce are preparing for new implementations with the use of DMLS technology. Crowns and dental bridges made of CoCrMo alloy have been produced for many years with help of the M270 machine instead of milling and casting. The M270, M280 and M290 machines produce titanium implants and implants designed for individual patients. The tool industry manufactures special inserts with conformal cooling for injection molds and pressure molds that shorten the injection cycle time and improve the quality of the manufactured parts.

 

EOS CobaltChrome SP2

 

EOS CobaltChrome SP2 – resistance to corrosion, oxidation and high temperature

EOS CobaltChrome SP2 is a material processed in DMLS / SLM technology, used to produce parts from cobalt-chromium-molybdenum alloy. This material is distinguished by high resistance to oxidation, corrosion and extreme temperatures. It also has excellent mechanical properties. EOS CobaltChrome SP2 is often used in biomedical solutions, such as dental or medical implants. This material is also used for structures operating in high temperature environment, such as turbine blades for high temperature components of gas turbines and jet engines. Printed parts can be processed, for example by polishing, welding or varnishing.

Properties of EOS CobaltChrome SP2:

  • low nickel content (less than 0.1%)
  • excellent resistance to corrosion and high temperature
  • improvement of mechanical properties with and increase of temperature to 500-600°C
  • meets high chemical and mechanical requirements and has the ISO 5832-4 certificate for ASTM F75 cast CoCrMo alloys

Material EOS CobaltChrome SP2 can be used:

  • as finished products
  • as functional prototypes of metal parts
  • as small production series
  • as mechanical elements working in difficult conditions (such as high temperature)
  • in aviation industry
  • in energy industry
  • in biomedical industry

Technical parameters:

Data on the geometric properties of materials in DMLS/SLM/LaserCusing technology*: EOS machine M100

The minimum wall thickness – about 0.3 mm

Surface roughness – Ra 4 – 10 μm, Rz 20 – 40 μm

Effectiveness of powder sintering – 7.4 mm3/s (26.6 cm3/h)

Physical and chemical properties of models in DMLS/SLM/LaserCusing technology*: EOS machine M100

Composition of material in DMLS/SLM/LaserCusing* technology

Carbon (60-65%)

Cr (26-30%)

Mo (5-7%)

Si (< 1.0%)

Mn (< 1.0%)

Fe (< 0.75%)

C (< 0.16%)

Ni (< 0.10%)

Relative density – about 100%

Density – 8,3 g/cm3

Mechanical properties of models in DMLS / SLM ? LaserCusing* technology: EOS M100 machine [after printing / after thermal treatment]

Tensile strength

– horizontal direction (XY) – 1350 ± 100 MPa/1100 ± 100 MPA

– vertical direction (Z) – 1200 ± 150 MPa/1100 ± 100 MPa

Yield point

– horizontal direction (XY) – 1060 ± 100 MPa/600 ± 50 MPa

– vertical direction (Z) – 800 ± 100 MPa/600 ± 50 MPa

Elongation at break

– horizontal direction (XY) – 11 ± 3%/Min. 20%

– vertical direction (Z) – 24 ± 4%/Min. 20%

Young’s modulus

– horizontal direction (XY) – 200 ± 20 GPa/200 ± 20 GPa

– vertical direction (Z) – 190 ± 20 GPa/200 ± 20 GPa

Hardness – 35 ± 45 HBW/35 ± 45 HBW

*DMLS (Direct Metal Laser Sintering) is a name registered byf the German company EOS (Electro Optical Systems). SLM (Selective Laser Melting) is a registered company name of MCP Hek, currently available to SLM Solutions, MTT and Renishaw, Realizer. Laser Cusing, however, is a proprietary name of the technologyowned by Concept Laser – a company belonging to the Hofmann Innovation Group.  At the beginning of the development of this technology, EOS and MCP Hek used also the SLM name. The MCP claimed the rights to this name first which resulted in the fact that EOS had to create its own name – DMLS. All these names refer to the technology of selective sintering and powdered metals remelting with the help of a laser, applied in layers until a durable part is obtained.

 

3D metal printer EOS M100

 

Drukarka 3D do metalu EOS M100 – DMLS / SLM technology in a compact version

The EOS M100 printer is an industrial DMLS / SLM technology in a compact version, dedicated to laboratories and R & D departments. It is the smallest 3D metal printing system which is an excellent solution for the production of unitary products and small series production of small-sized elements. The modular design of the process chamber and powder feeding allows for easy and quick operation, making it user-friendly. The system uses a proven fiber laser (200W), which ensures process stability and production of high-quality parts.

The small dimensions of the working chamber (diameter 100 mm, height 95 mm), the high efficiency of power distribution system during 3D printing and high process parameters enable quick and economical small series production. In addition, a small laser spot diameter and its high resolution allow you to create complex geometries. Thanks to the combination of a 200W fiber laser, a new generation of the laser exposure parameters and a print parameters stabilization system, the processing of the following materials is ensured:

  • stainless steel – 316L (1.4404)
  • titanium alloy – Ti64 (TiAl6V4)
  • chromium-cobalt superalloys – CoCrMo SP2

Printing in DMLS / SLM technology

DMLS/SLM technology – precise, durable and functional 3D printing and injection molds

DMLS/SLM technology ensures 3D metal printing process using the method of selective laser sintering.

Using the DMLS / SLM technology, we gain the ability to create functional models that have wide application and unparalleled parameters.

3D systems working in this technology create models using the method of selective laser sintering. On the surface of the working platform, a layer of metal powder is spread, which is sintered locally by means of a laser beam. Production of elements layer by layer allows to perform 3D printing for metal details of complex geometry, omitting the necessity of using specialized tools. The manufactured elements have high accuracy, excellent surface quality and mechanical properties of metals.

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3D systems working in DMLS / SLM technology are:

3D metal printer EOS M100

3D metal printer EOS M290

3D metal printer EOS M400

The information about technologies, materials and 3D printers provided on the website come from the BiBusMenos Sp. z o.o. – an authorized representative of EOS.