The electric cross scratch tester is a universal instrument used for conducting various scratch and scratch resistance tests on paint and plastic surfaces. For test pieces of different thicknesses, single or multiple row knives can be used for parallel and cross engraving (sample rotation 90 °).

Purpose and Application

The electric scratch tester is a universal instrument used to perform various scratch and scratch resistance tests on paint and plastic surfaces. For test pieces of different thicknesses, single or multiple row knives can be used for parallel and cross engraving (sample rotation 90 °).

Conduct adhesion tests according to the cross marking method specifically for all user standards, and conduct scratch resistance tests according to GME 60 280. The wide range of experimental parameters and multiple selection of experimental tools make these experiments easy to conduct.

The experimental results have good reproducibility and are accurate and reliable.

Design and Function

The cross cutting tester is a desktop instrument with a sturdy structure, which can also make the cutting tool stable and reliable under harsh conditions. The experimental process is controlled by PLC, and all parameters (engraving speed, engraving length, cross engraving mode) can be set with buttons. Each motion program (test piece transfer, engraving position, and required pressure adjustment) is driven by an independent stepper motor.

During the experiment, the sample moves in a straight line at a constant speed. Press the cutting edge onto the sample according to the required pressure (up to 50 N). The transmission guide ensures that the test tool tip is pressed onto the test disc according to the specified requirements. The supply scope includes two control boards for different cross engraving modes, which are easily interchangeable.

There are two types of electric grid testers, manual or motor-driven pressure regulation. The manual test pressure adjustment is simple and accurate. The motor driven pressure regulating instrument can also be tested by gradually increasing the pressure. The pressure required to achieve complete engraving can be determined during the trial engraving.

A set of 5 weights is used as a selection accessory for testing in a low-pressure range, with a test pressure ranging from 1 to 10 N in increments of 1N.

Test standards:

1. VDA 621-411 Paint adhesion

2. EN ISO 2409 Coatings - Grid cutting test for coatings

3. ASTM/D 3359 Standard Test Criteria for Coating Adhesion Testing by Tape Method

4. ISO 2409

5. JIS K 5400

6. JIS K 6894

7. SNV 3711

8. pv3974

9.pv3952

10. GMW14688