HG/T 2068-1991 Technical Specifications for Rubber Rapid Plasticity Tester HG/T2068-1991 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG/T2068-91
Technical Conditions for Rapid Rubber Plasticometer
Published on July 6, 1991
Ministry of Chemical Industry of the People's Republic of China
Implementation on January 1, 1992
Chemical Industry Standard of the People's Republic of China
Technical Conditions for Rapid Rubber Plasticometer
Subject Content and Scope of Application
This standard specifies the technical requirements, test methods and inspection rules for the rubber rapid plasticometer (hereinafter referred to as the plasticometer). This standard is applicable to the rapid plasticometer for determining the rapid plasticity value of natural rubber and unvulcanized rubber and the plasticity retention rate of natural rubber. 2 Reference standards
GB2611
3 Structure
Technical requirements for testing machines
Plastic meter is mainly composed of deformation measuring device, load device, time control device and heating device (see the schematic diagram for the main structure) Schematic diagram of the structure of rapid plastic meter
1-Displacement mechanism. 2-Horizontal frame: 3-Upper service plate: 4-Lower service plate: 5-Electric starter: 6-A+F: 7-Balance spring; 8-Toggle joint: 9-Small spring: 10-spindle: 11-load spring
Approved by the Ministry of Chemical Industry of the People's Republic of China on July 6, 1991 and implemented on January 1, 1992
HG/T2068-91
3.2 The deformation measuring device is mainly composed of upper and lower pressing plates and displacement measuring mechanism. Its circular working plane should be smooth and flat and can move vertically relative to each other. The upper pressing plate is made of stainless steel, the lower pressing plate is made of chrome-plated brass, and both upper and lower pressing plates are equipped with heating sleeves , so that the temperature of the pressing plate remains within the specified range. The upper pressing plate of different specifications shall be equipped according to the test requirements. The upper and lower pressing plates shall be flexible to lift and lower, and no swaying phenomenon is allowed. The load device is mainly composed of a load spring and a balance spring. 3.3
3.4 ​​The time control device shall be able to adjust the time to ensure accurate timing. 3.5 The heating device may adopt steam heating or other heating methods, and shall ensure the required test temperature of the upper and lower pressing plates. 3.6 This plasticity meter can be equipped with a test aging box (see Appendix A) and a specimen cutter (see Appendix B). 4
Technical requirements
Normal working conditions of the testing machine
The surrounding environment is motionless and free of corrosive media; b.: The ambient temperature is 10~35℃;
Relative humidity is 30%~85%;
The power supply voltage error is ±10% of the rated voltage. d.
4.2 Deformation measuring device
The specifications of the upper pressing plate shall meet the requirements of the following table .
Specifications of the lower pressure plate: diameter d=15mm, height h=3mm.4.2.2
4.2.3 The contact area between the upper and lower pressure plates should not be less than 70% of the area of ​​the upper pressure plate.4.2.4. The relative spacing between the upper and lower pressure plates should be accurately adjusted to 1±0.01mm.4.2.5 The movement of the upper and lower pressure plates should be completed within 2s.4.3 Load device
The force applied to the lower pressure plate by the load spring should be 100±1N;4.4 Time control The control device
should be able to accurately set the preheating time and loading time: a.
Preheating time 15#'s;
b. Loading time 15±0.2s.
4.5 The heating device
should be able to maintain the required overflow of the upper and lower pressing plates
The temperature of the upper and lower pressing plates is 100±1℃
4.6 Appearance and electrical performance requirements
The appearance and electrical requirements should comply with the requirements of GB2611, 4.7 Transport Bump Resistance
The plastic meter shall be able to withstand the bump test without damage under the packaging conditions. The plastic meter after the bump test shall still meet the requirements of this standard without adjustment. 5 Test Method
HG/T2068
5.1 Test Conditions
The test shall be carried out under the conditions specified in Article 4.1 of this standard. 5.2 Labor, measuring instruments and materials required for the test a,
100N third-class gravity weight; ||tt| |Stopwatch;
Micrometer (division 0.001mm);
dThermometer (division 0.5°C);
Red lead;
.f. Acid-free, matte bleached cigarette paper (approximately 17g/m2)) 5.3 Deformation measuring device test
5.3.1 Use a micrometer to check that the size of the upper pressure plate shall comply with the provisions of Article 4.2.1. 5.3.2 Use a scale to check that the size of the lower pressure plate shall comply with the provisions of Article 4.2.2. For the parallelism test of the upper and lower pressing plates, apply red lead to the plane of the lower pressing plate and measure the contact area of ​​the upper pressing plate. It should comply with the provisions of Article 4.2.3. 5.3.3
4 For the 1±0.01mm spacing test of the upper and lower pressing plates, the test should be carried out using the following method and should comply with the provisions of Article 4.2.4. The test steps are as follows 5.3.4
Control the temperature of the upper and lower pressing plates to be stable at 100℃, 5.3.4.1
5.3.4.2 Pull out the knob of the instrument calibration mechanism
5.3.4.3 Open the upper pressing plate, place two pieces of cigarette paper between the upper and lower pressing plates, close the upper pressing plate and adjust the displacement measuring mechanism to indicate zero. 5.3.4.4 Raise the lower pressing plate at the specified overflow and press it tightly with the upper pressing plate. The displacement measuring mechanism will indicate the moving distance of the lower pressing plate. If it does not comply with the provisions of Article 4.2.4, it needs to be adjusted. 5.3.4.5 The adjustment method is to loosen the fastening screws on the crossbeam and adjust the zero point of the displacement measuring mechanism within the 15s preheating time. During the 15s test time, when the lower pressure plate rises, immediately adjust the relative distance between the lower pressure plate and the upper pressure plate through the adjustment screws of the upper pressure plate to keep it at 1 ± 0.01mm. If necessary, repeat the adjustment method. After the test, tighten the fastening screws on the crossbeam and push the correction mechanism and knob.
5.3.5 The moving time of the upper and lower pressure plates should be checked with a stopwatch to meet the requirements of Article 4.2.5. 5.4 Load device test
The test should be carried out using the following method and should meet the requirements of Article 4.3. The test steps are as follows: 5.4.1 Hang a 100N gravity base weight at the load correction part of the instrument 5.4.2 Pull out the instrument correction mechanism knob.
5.4.3 Close the upper platen and conduct the test after preheating for 15 seconds. 5.4.4 During the loading stage, the lower platen moves vertically upward, and the displacement should be within the range of 0.3~0.6mm. If the displacement exceeds the specified range, the load spring adjustment nut should be loosened. If the displacement is lower than the specified range, the load spring adjustment nut should be adjusted in the direction of tightening. Conduct 3 tests to ensure that each test is within the required range. 5.5. Time control device error test
Use a stopwatch to test, which should comply with the provisions of Article 4.4. 5.6 Heating device test
After the temperature of the upper and lower pressing plates is stable, use a thermometer to measure the temperature of the upper and lower pressing plates, which should comply with the provisions of Article 4.5. 5.7 Appearance and electrical performance test
Perform the test according to the requirements of GB2611.
5.8 Bianlai test
HG/T2068-
After the plastic meter is packaged, it is driven on a third-class highway at a speed of 30-40km/h by a truck for 200km without adjustment. It is tested according to the requirements of this standard and should meet the requirements.
6 Inspection rules
6.1 Each plastic meter must be inspected and qualified by the quality inspection department and accompanied by quality certification documents before it can leave the factory. 6.2 Test items:
Plastic meters are divided into factory tests and type tests. The factory test shall be conducted in accordance with the requirements of 4.2 to 4.6; the type test shall be conducted by sampling in accordance with 4.2 to 4.7. The type test shall be conducted in the following cases:
new products (including old products converted to production); major changes in the design, process or materials and supporting components of the product; regular spot checks on batch-produced products; quality evaluation of similar products.
6.2.3 Sampling:
Regular spot checks shall be conducted for type tests, generally once a year, and no less than 2 units shall be inspected each time. 6.2.4 Judgment rules
If there are unqualified items in the factory test products, they can be repaired once and re-inspected. If there are still unqualified items, the product is judged to be a
unqualified.
b. Type tests shall be conducted on qualified products of the factory test. If one unit fails in the random inspection, it can be repaired once. If two units of the same item are unqualified, the batch of products is judged as unqualified. Marking and packaging
Each plastograph is marked with a nameplate, which includes: product name, product model, production date, production number, manufacturer name. 7.1
The plastograph should be firmly fixed in the packaging box to ensure that it does not move in any direction during transportation. 7.2
7.31Marking outside the packaging box
Manufacturer name, product name, model and production number: b.
Receiving unit and address;
Box size, gross weight and words such as "upward" and "lightly" e.
7.4Random documents
aPacking list:
b.\Instruction manual;
CProduct certificate:
A1Overview
HG/T 206891
Test aging chamber
(Supplement)
The test aging chamber is a special device used in conjunction with a rapid plasticity meter to determine the plasticity retention rate of natural rubber. The plasticity retention rate is a measure of the oxidation damage of natural rubber and is an important indicator of natural rubber. The determination of this indicator must be equipped with a special aging chamber. A2 Structure
The box is composed of a heating chamber, a temperature control system, a time control system, and an air circulation system. A3 Technical requirements
A3.1 Control overflow: 140±0.2℃;
Control time: 30±0.25min;
115ml/min, replace 10 times the working volume of the aging box every hour, air flow:
Appendix B
Sample cutting machine
(Supplement)
B1 Structure
The rubber rapid plastic meter needs to be equipped with a special sample cutting machine. The machine can quickly and conveniently cut disc-shaped samples of roughly the same volume. Its main structure consists of a flat-bottomed cylindrical drill seat and a simple cutter head with a plug inside. The diameter of the cut sample is about 13mm.
B2 Technical requirements and adjustment
B2.1 The diameter of the blade is @13mm
B2.2 When cutting the sample, the gap between the circular surface of the cutting blade and the end face of the cutting machine plunger should be 3mm. The adjustment method is to loosen the cylindrical butterfly nail at the top of the plunger and loosen the hexagonal nut,
Then adjust the adjustment butterfly nail above the plunger to the correct position, and tighten the round head screw at the top after adjustment
Additional instructions:
This standard is proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Rubber Testing Instrument and Equipment Standardization Technical Committee of the Ministry of Chemical Industry. This standard was drafted by Beijing Rubber Industry Research and Design Institute, and the main drafter of this standard is Cui Wenli.
People's Republic of China
Chemical Industry Standard
Technical Conditions for Rapid Rubber Plasticometer
HG/T2068-91
Editor: Chemical Industry Standard Editorial Department
(Standardization Research Institute of Ministry of Chemical Industry)
Postal Code: 100013
Printing: Standardization Research Institute of Ministry of Chemical IndustrybZxz.net
Copyright reserved. No reproduction allowed
Printing Sheet Number of Words 10000
Format 880×12301/16
First Edition in July 1992
First Printing in September 1992
Printing Quantity 1-500
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