Shellac thermal hardening time tester
Contact Info
- Building 1, No. 5500 Yuanjiang Road, Minhang District, Shanghai,
- 高洁
- 13761436048
- 3982822529@qq.com
The YJ-8143A Lacquer Heat Hardening Time Tester is designed and manufactured in accordance with the requirements specified in the standard GB/T 8143 "Methods for Inspection of Lacquer Products" for the determination of heat hardening time, and is suitable for measuring the heat hardening time of lacquer by the method specified in the standard. Test principle: Lacquer undergoes dehydration and polymerization when heated. The heat hardening time refers to the time required for the polymerization of lacquer under specified conditions.
I. Main Technical Features of YJ-8143A Lacquer Heat Hardening Time Tester
1. This instrument consists of a closed electric furnace, a test plate, a picking needle, etc. It has a small volume and occupies little space.
2. The closed electric furnace adopts an integrated structure with a magnesium-aluminum alloy heating plate, which has a short heating time, long service life and beautiful overall design.
3. The temperature control uses an adjustable LCD digital display controller, which has small temperature overshoot and stable and accurate temperature control.
4. Test procedure: Weigh 0.05g±0.001g of sample that has passed through a sieve with an aperture of about 0.4mm (equivalent to 40 mesh), and evenly place it in the concave part of the copper block of the heat hardening tester at a temperature of 170℃±0.5℃. When the sample is completely melted, start the stopwatch immediately. The test needle forms an angle of about 30° with the horizontal plane, and stirs at a speed of 60r/min. When approaching the end point, use the needle tip to pick the sample. When the test needle can pick the sample away, that is the end point. Stop the stopwatch immediately. The time recorded by the stopwatch is the heat hardening time. Test each sample 2 to 3 times, and take the shorter time among the two times with a difference within 5s as the standard. If the difference exceeds 5s, retest until it meets the requirements.
II. Main Technical Indicators and Parameters
1. Rated power: 1200W;
2. Rated voltage: AC(220±10%)V, 50Hz;
3. Maximum temperature: 300℃;
4. Plate material: Polytetrafluoroethylene-coated magnesium-aluminum alloy;
5. Temperature control accuracy: 0.5℃;
6. Temperature control: LCD digital temperature controller;
7. Heat conduction module: Q235 carbon steel, formed by one-time processing;
8. Sample heating: H62 brass;
9. Sample picking needle: 304 stainless steel;
10. Mercury thermometer: 150-200℃, each scale is 0.1℃;
11. Timing stopwatch: Accuracy is 0.2s;
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