Bursting strenght tester

Purpose
This test determines the tensile strength and the elasticity of a paper specimen fixed in a annular clamping device, which is uniformly expanded up to the point of rupture.

Principle
With an expanding rubber diaphragm, a paper specimen fixed in an annular clamping device is uniformly loaded from one side up to the point of rupture. The pressure is measured as bursting strength BS where as mA is the basis weight. The specific bursting
Strength be is expressed as :

Be = 100 * [BS / mA]

How to use
Prepare paper sample ( one space for couple point)
Open the clipper (specimen clamping) with turned screw
Put in sample paper between base specimen and clamping specimen
Tide it up with turned round clamping specimen screw
Turn on the motor and switch up the clutch Run (clutch lever) for running test.
After sample broke up, remove back the clutch lever quickly to early position
Read the result test on the showing needle ( loading pointer) and wrote
Do the test again for another different space point
Count the average result and wrote

BURSTING STRENGHT TESTER
Construction

Load – pointer
Specimen clamping handle
Clamping gauge
Frame
Specimen clamping ring
Specimen base
Motor switch
Stop nut
Pressure gauge
Maximum pointer(idle pointer)
Exhaust cock
Motor
Pressure gauge changing handle
Clutch lever
Oil gauge
Gear box
Rubber diaphragm clamping screw
Pressure feed pipe
Pressure chamber
bed

Specifications

Low pressure type

Pressure range : below 14 kg/cm² /or
below 0.64 mm (thickness)
not applied : liner-board, corrugated
Diameter of specimen : 30.48± 0.03 mm
Upper clamping ring
Lower clamping ring : diameter : 31.5 ± 0.5 mm
thickness : 3.18 mm

Rubber diaphragm : 0.84 – 0.89 mm (flat disc)
9.5 mm swelling pressure above clamping
surface 0.35 – 0.45 kg/cm²

Pressure feed speed : 95 ± 10 ml
Pressure gauge accuracy : 0 – 1 0.01
(Desirable to use) 1 – 3 0.02
25 – 75 % of maximum 3 – 7 0.05
scale 7 – 15 0.1

Specimen clamping : clamp tightly
pressure

High pressure type

Pressure range : below 14 kg/cm² /or
below 0.64 mm (thickness)
not applied : liner-board, corrugated
Diameter of specimen : 31.50± 0.05 mm
Upper clamping ring
Lower clamping ring : diameter : 31.5 ± 0.5 mm
thickness : 5.60± 0.05 mm

Rubber diaphragm : 0.84 – 0.89 mm (flat disc)
9.5 mm swelling pressure above clamping
surface 1.60 – 2.1 kg/cm²

Pressure feed speed : 170 ± 20 ml
Pressure gauge accuracy : 0 – 10 0.1
(Desirable to use) 0 – 25 0.2
25 – 75 % of maximum 0 – 50 0.5
scale 0 – 100 1

Specimen clamping pressure : Desirable to arrange the device capable of constant clamping pressure(above 7 kg/cm² except corrugated board)