Foam Testing Instruments IS 7888 1976

Product Details:

Shear Fatigue Tester is used to determine the effect of repeated compression in Polyurethane foam. In this test, the test specimen in shape of 380 x 380 mm square is held over a flat reciprocating platform and is pressed down from the top by a horizontal cylindrical roller inclined at an angle of 15 deg. to the direction of motion of the platform. The platform is moved for a specified number of cycles and the effect of repeated compressions produced on the test specimen is evaluated by finding the change in its thickness and indentation hardness index.

Product Details:

We are a manufacturer of Foam Testing Instruments as per IS 7888 1976 standard

Additional Information:

• Item Code: IS7888-1976

Product Details:

The feel of softness of any flexible foam is quantitatively defined by its indentation hardness. Indentation hardness of foam is determined by pressing a circular indenter at a specified speed against a block of foam and finding the force needed to compress it to a specified percentage of its initial thickness. 

The TEXCARE Indentation Hardness Tester for polyurethane foam consists of a circular indenter which can be pressed against the foam block under test, a motorized arrangement to move the indenter, and a load indicating arrangement to indicate the load being exerted by the indenter on the foam block at any instant. 

The indenter is in shape of a circular disc and is mounted on a self-aligning ball bearing to ensure that it sits parallel to the surface of the test specimen. It is mounted at the lower end of a screw, which can be raised or lowered at a specified speed with the help of a motor and worm reduction gearbox. An arrangement to stop the motor at extreme ends of travel of the indenter is provided. 

The load platform is made of cast aluminium and has a large number of holes arranged in a grid for rapid escape of air during compression. It is mounted on shear beam type load cell. A digital load indicator is provided to indicate the load acting on the test specimen. 

Technicla Specification:

Size of Sample                                     : 380 x 380 mm

Area of Indenter                        : 323 cm²

Diameter of Indenter                  : 202.8mm

Capacity of Load                      : 100Kgf

Accuracy of Load                      : 0.01Kgf (10gm)

Traverse Measurement               : 0 to 150 mm

Speed of Movement of Indenter : 150 mm/ min

Diameter of Hole on Platform    : 6 mm

Distance between holes             : 19 mm

Power                                       : 220 V AC 50Hz.

 

Related Standards: IS 7888 1976, ASTM D 3574 - 1986

Additional Information:

• Item Code: IH700