Some standard content:
Chemical Industry Standard of the People's Republic of China
Dyeing Rubber Roller
Subject Content and Scope of Application
HG/T2447-93
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and use requirements of printing and dyeing rubber rollers.
This standard applies to the pad dyeing and water squeezing rubber rollers in printing and dyeing machinery, and also applies to other rubber rollers. 2 Reference standards
Determination of tensile properties of vulcanized rubber and thermoplastic rubberGB/T 528
GB1689
Determination of wear resistance of vulcanized rubber (using Akron abrasion machine)GB/T1690Test method for liquid resistance of vulcanized rubberGB3512Test method for hot air aging of rubberGB9894
GB9895
GB 9896
Requirements for hardness of rubber rollers
Classification of surface characteristics of rubber rollers
Dimensional tolerances of rubber rollers
Determination of apparent hardness of rubber rollers Zhao (PJ) hardness tester methodHG/T 2413.1
HG/T2413.2 Determination of apparent hardness of rubber rollers Shore hardness tester method HG/T2450 Determination of apparent hardness of rubber rollers Rubber international hardness tester method 3 Product classification
3.1 Product marking
3.1.1 Marking method
Products shall be marked in the following order:
Product name, hardness (hardness value and hardness type), specification size (nominal diameter × nominal length), this standard number 3.1.2 Marking example
The printing and dyeing rubber roller with rubber international hardness of 85, nominal diameter of 250mm and nominal length of 1600mm is marked as: a .
Printing and dyeing rubber roller 85IRHD250×1600HG/T2447b. The printing and dyeing rubber roller with Shore A hardness of 85, nominal diameter of 250mm and nominal length of 1600mm is marked as: Printing and dyeing rubber roller 85A250×1600HG/T2447 Zhao's (PJ) hardness of 35, nominal diameter of 250mm and nominal length of 1600mm is marked as: c.
Printing and dyeing rubber roller 35P.J250×1600HG/T24473.2 Structure
The rubber roller consists of a metal core, an adhesive layer and a coating rubber layer (as shown in the figure below). Approved by the Ministry of Chemical Industry of the People's Republic of China on July 8, 1993 296
Implemented on July 1, 1994
4 Technical requirements
4.1 Hardness requirements:
4.1.1 Hardness regulations:
HG/T2447—
1-Coating rubber layer; 2-Adhesive layer; 3-The hardness of the metal core rubber roller can be selected by the manufacturer and the ordering party (hereinafter referred to as the supply and demand parties) as one of the following hardnesses as the hardness of the rubber roller.
International rubber hardness (IRHD);
Shore hardness (A);
PJ.
Hardness tolerance and hardness difference with the same root shall be as specified in Table 1. Table 1
Nominal hardness value
Rubber international hardness
PJ hardness
Shore A hardness
Note: If there are special requirements, they can be negotiated and determined by the supply and demand parties. 95
Nominal hardness allowable deviation
Same root hardness allowable deviation
4.2 The physical properties of the rubber material with international hardness of rubber roller, Shore A hardness of 85 and PJ hardness of 35 shall be as specified in Table 2. The physical performance indicators of other hardness ranges shall be negotiated and determined by the supply and demand parties. 297
Tensile strength.MPawwW.bzxz.Net
Elongation at break, %
Permanent set at break, %
Hot air aging (70C×72h)
Akron abrasion.cm
Acid resistance test.10%H.S0) (168h×room temperature) Alkali resistance test.10%Na0H (168h×room temperature) Item
HG/T 2447 -- 93
Change rate of tensile strength (reduction), %
Change rate of elongation at break (reduction), %
Change rate of tensile strength (reduction), %
Change rate of elongation at break (reduction), %
Change rate of tensile strength (reduction), %
Change rate of elongation at break (reduction). %
Note: The hardness of the rubber compound shall be consistent with the hardness specified for the rubber roller, and its hardness tolerance shall not be less than the hardness tolerance of the rubber roller.
4.3 Dimensional tolerance
4.3.1 When the ratio of the rubber roller coating length to the roller core diameter is within 15 times, the diameter deviation and coating length deviation shall be as specified in Table 3. If the requirements of the purchaser cannot be met, the supply and demand parties shall select according to the grade specified in GB/T9896. Table 3
Diameter of rubber roller
100160
160~250
250400
100~630
Diameter deviation
Length of coated rubber
≥1 000～1 600
>1 600～2 500
Deviation of coated rubber length
4.3.2 The circular runout, cylindricity and mid-height tolerance of the rubber roller shall be selected by both the supplier and the buyer according to the grades specified in GB/T9896. 4.4 The thickness of the rubber layer of the rubber roller is generally within 25mm. If the thickness of the rubber layer exceeds the specified range, it shall be determined by negotiation between the supplier and the buyer. 4.5 The rubber layer of the rubber roller shall be firmly bonded to the metal core, and there shall be no delamination or cracking. 4.6 Unless otherwise specified, the surface processing of the rubber roller shall reach the fine grinding grade. mm
Surface quality of rubber roller:
The surface of the rubber roller is not allowed to have mechanical damage or other defects that affect the use requirements, impurities, bubbles, and sand holes. Defects such as defects shall be selected by both parties according to the different needs of rubber rollers and in accordance with the provisions of Article 2.1.2 of the surface quality classification of rubber rollers in GB/T9895. Note: (The geometric shape of the area of "any 0.1m2" in Article 2.1.1 of 13/T9895 should be a square area. 4.8 The technical conditions of the metal core for rubber rolls shall comply with the provisions of Appendix A. 5 Test methods
5.1 Determination of physical properties of rubber
5.1.1 The determination of tensile strength, elongation at break and permanent deformation at break of rubber shall be carried out in accordance with the provisions of GB/T528, using type 1 test specimens. 298
HG/T2447.·9 3
5.1.2 Hot air aging test of rubber shall be carried out in accordance with GB/T3512. 5.1.3 Determination of wear resistance of rubber shall be carried out in accordance with GB/T1689. 5.1.4 Determination of acid and alkali resistance of rubber shall be carried out in accordance with GB/T1690. 5.2 Determination of apparent hardness of rubber roller
5.2.1 Determination of Shore A hardness shall be carried out in accordance with HG/T2413.2. 5.2.2 Determination of international hardness of rubber shall be carried out in accordance with HG/T2450. 5.2.3 Determination of Zhao's (PJ) hardness shall be carried out in accordance with HG/T2413.1. Hardness requirements shall be in accordance with GB/T98 94. 5.2.4
5.3 Rubber roller size and deviation measurement
According to GB/T9896.
5.4 Rubber roller rubber layer thickness measurement
According to GB/T9896 and Appendix A. The rubber layer thickness is half of the difference between the rubber roller diameter and the metal core diameter. 5.5 Rubber roller rubber layer delamination, debonding and other defects inspection is carried out by tapping with a small hammer.
5.6 Rubber roller surface processing measurement
According to GB/T9895.
5.7 Rubber roller surface quality inspection
Use measuring tools and visual inspection methods.
6 Inspection rules
6.1 Factory inspection
6.1.1 The hardness deviation and hardness difference of the same roller, diameter deviation, coating length deviation, delamination between the coating and the metal core, cracks, surface processing and surface quality of the rubber roller should be inspected one by one. 6.1.2 If any of the above inspection items fails, the rubber roller is unqualified. 6.2 Type inspection
6.2.1 All technical requirements listed in this standard are type inspection items. 6.2.2 Under normal production conditions, tensile strength, elongation at break and permanent deformation at break are tested once every half month; hot air aging, Akron abrasion, acid resistance test and alkali resistance test are carried out once every quarter. If one of the physical properties of the rubber material fails, double the sample should be taken for retest of the unqualified item. If the retest result is still unqualified, the rubber material is unqualified during this period. 7
Marking, packaging, storage and transportation
Each rubber roller should have the following markings:
Manufacturing unit;
Mark;
Trademark;
Manufacturing date;
e number;
Inspection pass stamp.
7.2. Wrap the rubber roller with opaque paper and evenly wrap it with a 5-10mm thick soft protective layer, then use two shaft heads to fix the rubber roller in the packaging box. The distance between the inner wall of the box and the rubber roller should be no less than 50mm. The packaging of rubber rollers picked up at this port or picked up by yourself shall be agreed upon by the supply and demand parties. 7.3 The outside of the packaging box should be marked with the sending unit, manufacturing unit, product name and "handle with care", "upward" and other marks. 7.4 For rubber rollers shipped to cold areas with a temperature of -10~0°C, the wooden box should be lined with moisture-proof paper and filled with insulation materials. For rubber rollers shipped to severely cold areas below -10 (°C), appropriate insulation measures must be taken. HG/T2447-93
7.5 During storage and transportation, rubber rollers should be kept away from direct sunlight, rain and snow, and should not come into contact with acids, alkalis, oils and organic solvents, and should be kept 2 meters away from heat sources.
7.6 Rubber rollers should be stored indoors at 0-35°C and relative humidity below 85%. The rubber layer of the rubber rollers should not be compressed. During storage, they should be rotated 180° every 1 month.
7.7 Under the above conditions, rubber rollers should be stored for a storage period of no more than 9 months from the date of manufacture. The product performance shall comply with the provisions of this standard. Usage requirements
The rubber roller is allowed to be used in a medium with a temperature not exceeding 80°C and an acid or alkali concentration not exceeding 10%. 8.2 The rubber roller shall not be subjected to pressure when not in operation. 8.3 When the rubber roller starts to operate, the pressure shall be gradually and evenly applied. 8.4 The extrusion load on the rubber roller during operation shall generally not exceed 500N/cm. 8.5 If slight wrinkles, cracks or unevenness appear on the surface of the rubber roller during use, it shall be removed in time for processing, grinding and trimming to meet the technical requirements for use.
Technical requirements for metal core
HG/T 2447--93
Appendix A
Technical requirements for metal cores for rubber rollers
(Supplement)
A1.1 The metal core is a solid or hollow cylinder with uniform wall thickness. A1.2 The structural dimensions and surface processing of the metal core shall comply with the provisions of the agreement between the manufacturer and the ordering party. A1.3 The material of the metal core can be cast iron, steel plate or steel pipe. The wall thickness of the cast iron hollow roller core should generally not be less than 10mm. The wall thickness of the steel core made of steel pipe and steel plate is specified in Table A1.
Metal core nominal diameter
>100～250
>250～500
A1.4 The surface of the metal core is divided into triangular threads with the middle as the boundary, and the left and right threads are separated. The main parameters of the threads are specified in Table A2. Table A2
Metal core nominal diameter
Thread depth
1.5～2.0|| tt||A1.5Both ends of the cast iron hollow roller core must have through holes, and the diameter of the holes should not be less than 20mm; they should be blocked with flat head screws when in use. If the diameter of the metal core is less than 150mm and the length is less than 1200mm, it is allowed not to open the hole. A1.6The sand holes and pores on the surface of the metal core are allowed to be repaired if the depth does not exceed 5mm, the area does not exceed 25mm2, and there are no more than 3 holes per square meter of surface. However, electric welding or blue lead and other methods shall not be used. A1.7There must be a center hole at both ends of the metal core shaft. In order to avoid mechanical damage caused by processing in the manufacturer, the shaft neck of the metal core does not need to be finely processed in advance.
A1.8The shaft neck length at both ends of the metal core should be greater than 100mm. A1.9The requirements for static imbalance of the metal core shall be agreed upon by the supply and demand parties. A2Test method
A2.1The specifications and dimensions of the metal core are measured with measuring tools such as calipers and tape measures. A2.2The surface quality of the metal core is inspected by visual inspection and measuring tools. A2.3 Determination of static imbalance of metal core:
The value and position of the metal core balance weight are determined under the static state of the metal core, that is, the metal core's shaft neck is placed on a horizontal support frame. In the unbalanced state, the heavier part rotates downward, and the lighter part needs to be placed with a counterweight to balance the metal core. At this time, the weight and position of the counterweight can be determined.
HG/T2447—93
Additional instructions:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Beijing Rubber Products Design Institute. This standard was drafted by Beijing Rubber Products Design Institute and Changzhou Lanling Rubber Factory. The main drafters of this standard are Zhang Chengyan and Zhu Wenyong. From the date of implementation of this standard, the original national standard GB9898-88 "Technical Conditions for Printing and Dyeing Rubber Rollers" will be invalid. 302
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