Asia Vision Instrument

The Tensile Testing Machine provide a relatively inexpensive way for determining the tensile strength and elongation of variety of raw materials such as rubber, leather, fabric, plastics, Belts, wires etcetera. They are based on constant rate of traverse principle in which one end of the test specimen is held in a stationary grip, while the other end is made to move at a known fixed speed with the help of motor, gearbox and screw arrangement. The load exerted on the stationary grip is sensed by a load cell and indicated by a digital load indicator. The controller is microprocessor based and has the facility of over load protection, peak hold and auto calibration. The load directly indicated in kilograms or Newton.

The strength of adhesion of sole of a shoe to its upper is determined by measuring the force needed to pull off the sole from the upper. A suitable last is placed inside the shoe which is then placed on a straight edge acting as a fulcrum for applying load on the joint of the sole and upper. The maximum load the sole is able to withstand before coming off is determined and reported as the sole adhesion strength. This test can be carried out either at the heel or at the toe of the shoe.

The Sole Adhesion Tester consists of a load cell and digital indicator to indicate the load applied at the junction of the sole and the upper, a lever arrangement to transmit the load exerted on the toe piece to the spring dynamometer, a straight edge fulcrum for resting the shoe on during the test, and a set of interchangeable toe pieces having different curvature.

Out soles of footwear or other flexing components may suffer cracking in use due to flexing. Cracks usually develop at points of high surface strain resulting from the design of the sole pattern, without there being any cuts to initiates them. The Belt Flex Tester is designed to flex complete soles with their patterns intact in a manner similar to those encountered in actual use. Tests carried out using it provide a guide to the risk of such cracks developing during use.

             The test specimens are attached to the outside of a continuous belt, which is driven round two rollers. The large roller drives the belt while movement of the smaller roller is chosen to make the flexing somewhat more severe than is actual use. This form of flexing also closely simulates the actual bending at each step as it produces a short period of rapid flexing followed by a longer period when the specimen is not being flexed.

         A normal test consists of a number of flexing runs up to a total of 50,000 flexes, with an examination for cracking at the end of each run.

The Ross Flex Tester consists an arrangement to hold one end of the test specimens in al oscillating grip such that they can be bent through an angle of 90º, A motor and gearbox arrangement to oscillate the free end of the test specimens pressed down during the bending operation

• Counter: Digital electronic counter
• Motor: 1/4 HP single-phase

The  Water Vapour Permeability Tester made of twelve brass bottles. The bottles have nut of circular opening. The bottles are mounted on the bottles holders which rotate at specified revolution per minute with the help of motor pulley & belts. The axis of the bottles is parallel to the axle of the bottles holders. A fan mounted in front of the mouths of the bottles and consisting of three blades in planes that is inclined at 120º to one another. The planes of the blades pass through the prolongation of the axle of the wheel. A pre set Digital timer is mounted for setting total no. of hours of instrument movement.

• All the pivot points of the apparatus have ball bearing to ensure the long life and smooth operation
• The apparatus is finished in bright chrome/ zinc plating and NC based painting for a corrosion resistance finish
• Electronic counter with key reset and backup memory to count the total number of flexing cycles
• Standard IS: 5914 – 1970: Method of physical testing of leather (flexing endurance)

Keeping in mind ever-evolving requirements of our respected clients, we are providing a premium quality range of Ross Flexing Tester.

• Number of specimen test: 2 for full sole, 6 for cut test specimen
• Diameter of bending mandrel: 30 mm
• Motor: ½ HP, single- phase 230V AC