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SikaBlock® M935

Polyurethane tooling board

SikaBlock® M935 is an unfilled light green polyurethane tooling board for foundry patterns, match plates and core boxes.  

  • Low coefficient of thermal expansion
  • Good abrasion resistance
  • Good flexural and compressive strength
  • Easy to machine
  • Reduced bonding lines due to large board dimensions
 
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PRODUCT BENEFITS

  • Low coefficient of thermal expansion
  • Good abrasion resistance
  • Good flexural and compressive strength
  • Easy to machine
  • Reduced bonding lines due to large board dimensions
 

Areas of Application

SikaBlock® M935 is well suited for foundry patterns, match plates and core boxes for cold box process.
It is also designed for various molds and tools, e.g. for true-size gauges and master models for high quality demands.
This product is suitable for experienced professional users only. The boards must be tested for the specific application in each case, e.g. type of sand molding process, binder, amine catalyst, etc.  

Packaging

Dimensions [mm]

Pcs./pallet

1490 x 495 x 30

1490 x 495 x 50

1490 x 495 x 75

1490 x 495 x 100

30

28

18

14

Product Details

Typical Product Data
Chemical base

Polyurethane

Color

Light green

Density

1.2 kg/l

Shore D hardness (CQP023-1 / ISO 868)

82

Compressive strength (CQP028-5 / ISO 604)

74 MPa

Flexural strength (CQP027-2 / ISO 178)

74 MPa

Flexural modulus (CQP027-2 / ISO 178)

2900 MPa

Impact resistance (CQP038-2 / ISO 179)

18 kJ/m2

Heat deflection temperature (CQP030-1 / ISO 75B)

89 °C

Glass transition temperature (CQP053-1 / ISO 11359)

92 °C

Linear coefficient of thermal expansion (CQP053-1 / ISO 11359)

56 x 10-6 1/K

CQP = Corporate Quality Procedure

Application

Application Information

Application

SikaBlock® M935 can be easily machined by milling, drilling, sawing or modified manually. It is recommended to use high performance tools to machine these boards.
For milling parameters check information from cutting tool manufacturers or get the General Guideline “Milling parameters for SikaBlock®” for more general information.

STORAGE CONDITIONS

The board needs to be stored flat over the entire surface in dry conditions.
Many models and tools are made of bonded boards, either with identical or other materials. Storage at low and elevated temperature can lead to high stresses due to the different expansion coefficients. To prevent this, it is necessary to store the models and tools at a temperature range between 15 °C and 30 °C.