ASTM D429 PDF

*Please Note: The information outlined above is to be used as reference for ASTM D Standard Test Methods for Rubber Property – Adhesion to Rigid. ASTM D determines the adhesion strength of rubber to rigid materials, such as metals. The standard requires that the testing machine conform to practices. 9 Sep This standard is issued under the fixed designation D ; the 1 These test methods are under the jurisdiction of ASTM Committee D11 on.

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Results are obtained by measuring the pull load necessary to separate a rubber strip from a metal surface at a 90 degree angle. To prepare the specimens for Method D, 6 rubber pucks are mounted in an assembly with a clamp to hold compressive force. The ASTM D standard describes methods to perform these tests with deadweights as an alternative to using a test machine.

Specimen damage may go unnoticed, adversely affecting the repeatability and reproducibility of test determinations.

ASTM D429 Rubber to Metal Adhesion Test Equipment

These further facilitate mold opening and reduce the occurrence of cavity damage from improperly positioned tools. The test is an orthogonal tensile test where the puck is pulled apart in tension. Slippage in grips will be a big challenge in testing rubber coating of metal because coating adhesion must be strong but astk material necks down, also called Atsm effect. In the Figure 7 diagram, the specimen is shown in a horizontal position, when in reality, the specimen would be placed vertically in the test machine.

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Each puck should be.

Create specimens that are 25 mm thick with a 29 mm diameter. This test is almost identical to Method B, except it applies exclusively to the rubber lining of a tank wall. By continuing to use our site, you accept our cookie policy. The platens are positively positioned with precision guide pins and receivers To begin testing, place the test specimen in the jaws attached to the fixed grip with the separating edge toward the operator.

Place your specimens in the tensile test machines and pull to failure each test piece which remains sufficiently intact, including those exposed to the chosen environmental conditions and the control test pieces, and record the peak force required to do this.

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The challenges of testing to this standard are: Adjustable data acquisition rates allow the user to ensure they are capturing all the desired peaks and troughs throughout the entire test.

Then subject the test pieces aatm the chosen environmental conditions. Apply the tension load at 2 inches per minute until the rubber either separates from the adhesive surface or until the rubber ruptures.

Next, the test pieces should be pre-strained by pulling in a test machine to just above the desired pre-strain and inserting a nylon block between the central metal plates to maintain the prescribed prestrain. Precision grinding ensures a parallel surface profile of the platens and CNC machining provides ultra-close dimensional tolerances, while the honing and polishing processes guarantee smooth, true specimen cavities.

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This uneven application of pressure may cause excessive overfill, or cavity voids. This test standard is divided into methods A through H. This test is often used d492 find which adhesive is best for the d29 rubber.

This will help avoid slipping in the test. Place the tab in the grip and apply a steady load at a test speed of 50 mm 2.

Load ratings from 1 kN to 10 kN lbf to 2, lbf Maximum specimen thicknesses of 7 mm or 8 mm 0. Method F is used to measure the adhesive strength of rubber to metal bonding agents. Record the total load at the time of failure. We highly recommend not using deadweights as those are outdated methods of retrieving data.

ASTM D – 14 Standard Test Methods for Rubber Property—Adhesion to Rigid Substrates

Apply a steady tension load until the rubber either separates from the metal surface or ruptures. The strip is volcanized to a piece of metal which is 1. Works very well with flat, thin specimens Eccentric design increases gripping force with tension.

They can be equipped with a selection of zstm grip jaw faces in various sizes and choice of surfaces including smooth ground, rubber-coated and serrated. Test Method A helps determine the static adhesion strength of rubber to metal. The handles are manufactured from stainless steel a chromium – nickel austenitic alloy and contain integral support pins.