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Purpose Of Conical Mandrel Bend Tester

Paints are applied for various purposes like protecting against metal corrosion, thermal insulation to decrease the energy consumption of cooling devices, fire resistant coatings, covering the cracks in a wall, enhance the look of cars, etc. Paint is commonly used the material available in various types like for surface finishing, and for specific applications. Selecting a correct type of paint as per the industry is vital to get the satisfactory result. A good paint must form a continuous protective film, high opacity, corrosion resistance, water resistance, heat resistance, color stability, quick drying, crack, durability, flexibility, easily cleaned, abrasion and scratch resistance, etc.

While using or applying a paint, some points are essential like resistant to the wear and tear of the atmosphere, color, and finish for a long time, and smoothness. Paint must be applied uniformly with a smooth finish. The paint must be easy to remove or clean without any chemical reaction. Water-based paint is preferred for a home that must provide comfortable room temperature. The long lasting, durable, and color fastness are the primary qualities of a good paint; apparently, the price also matters. The durability of paint can be evaluated by its scratchproof ability or crack resistance as tension can cause cracks in paints. The Conical Mandrel Bending Tester is used to determine the largest diameter of the cone at which coating shows flaking or cracking after bending.

The equipment evaluates the quality of the paint by bending a metal substrate duly coated with paint to a specific angle. The basic purpose of the tool is to determine the property of coating and resistance to cracking detachment from its substrate. This is a standard method to assess the flexibility and the adhesion property of coatings when subjected to bending stress. The instrument is recommended to test the resistance of paint, varnish, and coatings.

Testing Procedure of Conical Mandrel Bend Tester

Presto designs the high-quality Conical Mandrel Bend Tester to evaluate the properties of the coating by bending the test material, such as coated plate, around a conically shaped metal bar. The instrument consists of roller, base plate, eccentric sample locking lever, foot rest, conical rod and movement lever. The length of the conical rod is 8 inch and diameter is 3.2mm – 38.1 mm. The sample of 2mm thickness can be measured. The body of the tester is Mild Steel Chrome Plated. The testing procedure is entirely manual and simple.

  • Turn the bending lever towards the clamp until it stops and then insert the test sheet with coated side outward between the cone and the pressure roller into the clamping device.
  • Push the locking lever at the end of cone with a smaller diameter and secure the sample using the same lever. Insert a layer of the sheet between sample and pressure roller so that sensitive paint surfaces do not get scratched.
  • Turn the bending lever around the mandrel in a smooth movement (take 2 to 3 seconds) to bend the sample and inspect for cracking.
  • The result of the test is either the length of cracking from the find end of the mandrel or the diameter of the mandrel at the end of the crack.

After performing the testing procedures, examine the sample to measure the extent of cracks or to inspect any kind of scratches to the paint. This is a table top instrument, easy to install and require low maintenance. Read more at: Conical Mandrel Bending.

Presto Admin
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