• RAPID PROTOTYPING TECHNIQUE
    SLA | STEREOLITHOGRAPHY
    For the production of models
    from resin.
Stereolithography is among the most commonly employed techniques of rapid prototyping for the production of models from resin, since it offers a wide range of materials and finishes.

  • How it works

The prototype is made from a tridimensional file, previously created with a CAD/CAM system. The process that gives shape to the final piece is extremely easy: a special liquid resin, subject to polymerization when exposed to the sunlight, is filled in a vat crossed by a laser beam. The laser beam causes the resin hardening and the consequent creation of the prototype, layer by layer, bottom up.

The process in details: with the hardening of the liquid polymer, the laser beam shapes the transverse section of the object, lying on a pierced plate. When the first layer is completed, the plate descends by a distance equal to the thickness of a single layer, so to allow the laser bean to build the next layer, taken from the previous section. This process is repeated, until the piece is completed.

The creation of protrusions and cavities implies a high level accuracy, since each step is automatically generated by an original STL file.

Supports must be removed manually, once the product comes out of the machine.

The following chart explains the main features of this technology, divided according products made with a “Standard SL” equipment (for standard sizes) or with a “Mammoth SL” equipment (for large size parts).

Standard SL Mammoth SL
Layer thickness 0.1 – 0.15 mm 0.15 mm
Accuracy +/- 0.2% (min. +/- 0.2 mm) +/- 0.2% (min. +/- 0.2 mm)
Maximum part size* 500x500x580 mm 2100x680x800 mm
*The values in “maximum part size” refer to the dimensions of the employed vat.

  • Recommended for

  • "Show & tell" parts with smooth surfaces and excellent details;
  • Visual prototypes for photographic shootings, market test and 3D design test;
  • Prototypes for a limited functional test;
  • Samples obtained with copying techniques (moulding by reaction injection and vacuum equipment);
  • Metal components for platings;
  • Production of reduced volumes and complex shapes;
  • High level of accuracy and quality of the surface;
  • Representative parts for visual test;
  • Functional parts;
  • Small and big parts: from a switch component, to a car dashboard made from a single piece.

  • Technical features

  • Standard lead time depending upon dimensions and number of pieces;
  • Standard accuracy: standard stereolithography +/- 0.2% (min. +/- 0.2 mm); UV sensitive (e.g. direct sunlight);
  • Surface structure: without post-finishing, depending on the orientation of layers. Various finishing layers are possible. Brightness and roughness can be obtained after-finishing.
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  • Materials

Materials employed with this technology are resins with different and interesting qualities: firstly, they have limited sensitivity to humidity, which ensures good stability of the shape. The material we employ needs to combine high stability of the shape with the best features of the most prestigious materials available on the market. The part treated with stereolithography can be finished with sandblast and spray painting, or alternatively became a sample for melting techniques.

Reported below is an example of available materials:

  • Poly 1500

This material, comparable with resin, is appropriate for rigid and functional prototypes. It has a wide range of applications, e.g.: car parts, electronic parts, medical devices and much more.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 1227 - 1462
Tensile strength Mpa D638M 30 - 32
Elongation at break % D638M 15 - 25
Flexural modulus Mpa D790M 1310 - 1455
Flexural strength Mpa D790M 41- 46
Notched Izod impact J/m D256A 48 - 53
Hardness Shore D D2240 80 - 82
Heat deflection t° at 0,46 Mpa °C D648 52- 61
Actual values may vary with build conditions.


  • Specifications

Colour
  • Translucent
Characteristics
  • Flexible
  • Impact resistant
  • Tough
  • Durable
Recommended applications
  • Auto components
  • Electronic housing
  • Snap-fit assemblies
  • PP-like parts

  • TuskXC2700T / Tusk 2700W

Tusk2700 is particularly appropriate for resistant and waterproof prototypes with ABS and PBT, e.g.: pieces for waterflow analysis, wind tunnel testing and much more.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 2650 - 2880
Tensile strength Mpa D638M 47.1 – 53.6
Elongation at break % D638M 11 - 20
Flexural modulus Mpa D790M 2040 - 2370
Flexural strength Mpa D790M 63.1 – 74.16
Notched Izod impact J/m D256A 20 - 30
Hardness Shore D D2240 81
Heat deflection t° °C D648-98c At 0.46 Mpa: 45.9 – 54.5
At 1.81 Mpa: 49.0 – 49.7
Actual values may vary with build conditions.


  • Specifications

Colour
  • Tusk2700W – trasparent or white
  • TuskXC2100T - trasparent
Characteristics
  • Durable
  • Water Resistent
  • Strong
Recommended applications
  • Functional prototypes
  • Wind tunnel testing
  • Water flow analysis
  • High-end finished models
  • ABS-like parts

  • WaterClear

Water-Clear is appropriate for those parts of a prototype requiring a completely neutral transparency. Its mechanical features are limited if compared to TuskXC2700T.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 2860
Tensile strength at break Mpa D638M 55 - 56
Elongation at break % D638M 6 - 9
Flexural modulus Mpa D790M 2410 - 2570
Flexural strength Mpa D790M 82 - 85
Notched Izod impact J/m D256A 24 - 26
Water absorpotion % D570-98 1,1
Tg °C E1545-00 42 - 46
Heat deflection t° °C At 0.46 Mpa: 46 - 47
At 1.82 Mpa: 42 - 43
Actual values may vary with build conditions.


  • Specifications

Colour
  • Trasparente
  • Optical clear
Characteristics
  • Lower mechanical properties than TuskXC2700T
Recommended applications
  • Prototype parts that require fully neutral transapency

  • Tusk SolidGrey3000

This new material, now available for you, has the same strength and durability of a turtle shell. Tusk SolidGrey 3000 is, in fact, the first stereolithography material in the world, combining high level rigidity with resistance to impacts. The products made from this material are not only robust, but also extremely functional and involve a wide array of applications.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 2970 - 3285
Tensile strength at yield Mpa D638M 60 - 66
Elongation at yield % D638M 3.0
Elongation at break % D638M 4.6 - 7.2
Flexural modulus Mpa D790M 1843 - 2017
Notched Izod impact J/m D256A 30 -35
Hardness Shore D D2240 84
Water absorpotion % D570-98 0.36 – 0.40
Tg °C E1545-00 40 - 48
Deflection temperature °C D648-98c At 0.46 Mpa: 53 - 57
At 1.82 Mpa: 49 - 57
Actual values may vary with build conditions.


  • Specifications

Colour
  • Opaque gray
Characteristics
  • Impact resistant
  • Water resistant
  • Durable
Recommended applications
  • Automotive body parts
  • Machine covers
  • Functional prototypes
  • Durable concept models
  • Robust scale models

  • Next

Next is an extremely resistant resin, recommended in the production of details requiring high level accuracy, complex parts with good resistance to humidity and thermal properties.
Next is recommended whenever functional applications are required: snap fixing, impeller, working ducts, connectors, car compartments, dashboard assemblies, etc…

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 2370 - 2490
Tensile strength a Yeald Mpa D638M 41 - 43
Tensile strength at break Mpa D638M 31 - 35
Elongation at break % D638M 8 - 10
Flexural modulus Mpa D790M 2415 - 2525
Flexural strength Mpa D790M 68 - 71
Notched Izod impact J/m D256A 47 - 52
Water absorpotion % D570-98 0.39 – 0.41
Tg °C E1545-00 43 -47
Heat deflection t° °C D648-98c At 0.46 Mpa: 55 - 57
At 1.81 Mpa: 48 - 51
Actual values may vary with build conditions.


  • Specifications

Colour
  • White
Characteristics
  • Impact resistant
  • Tough
  • Durable
  • Thermal properties
  • Moisture resistance
Recommended applications
  • Snap-fit assemblies
  • Functional prototypes
  • Parts whit high feature detail

  • Protogen White

Protogen White is appropriate for general applications with ABS specifications. It is ideal for all markets requiring accurate RTV models, durable conceptual models and high precision parts.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 2310
Tensile strength Mpa D638M 43,8
Elongation at break % D638M 16
Flexural modulus Mpa D790M 2130
Flexural strength Mpa D790M 70,5
Notched Izod impact J/m D256A 22
Hardness Shore D D2240 88
Water absorpotion % D570-98 0.68
Tg °C E1545-00 57 - 59
Heat deflection t° °C D648-98c At 0.46 Mpa: 56
At 1.81 Mpa: 47
Actual values may vary with build conditions.


  • Specifications

Colour
  • White
Characteristics
  • Good surface quality
  • Tough
  • Durable
  • Good thermal properties
Recommended applications
  • Impellers
  • High-end finished models
  • Dut work and connectors

  • Xtreme

Xtreme is a resin which technical-mechanical properties, such as high level resistance to impacts, extension before breaking and excellent surface qualities, make it applicable in many fields. Xtreme is recommended for building cases, complex shaped boxes, snap fit assemblies and for replacing components that could be made with CNC working.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 1790 - 1980
Tensile strength Mpa D638M 38 - 44
Elongation at break % D638M 14 - 22
Flexural modulus Mpa D790M 1520 - 2070
Notched Izod impact J/m D256A 35 -52
Heat deflection t° °C D648-98c At 0.45 Mpa: 62
At 1.81 Mpa: 54
Actual values may vary with build conditions.


  • Specifications

Colour
  • Grey
Characteristics
  • Impact resistant
  • High elongation at break
  • Excellent surface quality
Recommended applications
  • Tough enclosures
  • Snap-fit assemblies
  • Replacing CNC machined parts
  • High-end finished models

  • NanoTool

NanoTool is employed in the production of strong, rigid and high temperature resistant components. It is appropriate for wind tunnel testing, aerospace and car applications. It features a superior dimensional quality, along with an excellent resolution for details that make it an ideal material in processes like, for example, nickel-plating of metals.

  • Datasheet

Units ASTM# Range
Tensile modulus Mpa D638M 11000 - 11400
Tensile strength Mpa D638M 61.7 - 78
Elongation at break % D638M 0.7 - 1
Flexural modulus Mpa D790M 10200 - 10800
Flexural strength Mpa D790M 79 - 121
Notched Izod impact J/m D256A 12 - 15
Water absorpotion % D570-98 0.23
Heat deflection t° °C D648-98c At 0.45 Mpa: 225
At 1.81 Mpa: 85 - 90
Actual values may vary with build conditions.


  • Specifications

Colour
  • Off white
Characteristics
  • Stiff
  • High temperature resistance
  • Superior sidewall quality
  • Brittle
Recommended applications
  • High temperature applications
  • Automotive
  • Aerospace

  • Finishing treatments: what is nickel-plating?

Nickel plating is a superficial treatment made on different materials, in order to modify their superficial features (durability, resistance against external agents, etc…).
There are two types of treatments: electrolytic and chemical nickel-plating.
Electrolytic nickel-plating can only be performed on metallic materials: when soaked in a chemical solution, they become nickel-plated by means of an electric current that carries the atoms from the pure material bars to the bars to be plated.
Chemical nickel-plating can be instead performed on different materials such as glass and plastics and it differs from electrolytic nickel-plating since the nickel exactly adapts itself to the shape of the piece to be plated. For this reason, chemical nickel-plating is particularly appropriate for mechanical parts where accuracy is required.
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Operating office: via Modigliani, 8 | 41043 Formigine (MO) | (Italy)
Telephone/fax: +39 059 315817 - e-mail: info@scp-rapidprototyping.it
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