Some standard content:
Chemical Industry Standard of the People's Republic of China
Papermaking Rubber Roller
1 Subject Content and Scope of Application
HG/T 2446-93
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation, storage and use requirements of papermaking rubber rollers. This standard applies to calendering rubber rollers and water-squeezing rubber rollers in papermaking machinery, as well as other rubber rollers. 2 Reference standards
GB/T528 Determination of tensile properties of vulcanized rubber and thermoplastic rubberGB1689 Determination of wear resistance of vulcanized rubber (using Akron abrasion machine)GB/T1690 Test method for liquid resistance of vulcanized rubberGB 3512
Test method for hot air aging of rubber
GB 9894
GB 9895www.bzxz.net
GB 9896
Requirements for hardness of rubber rollers
Classification of surface characteristics of rubber rollers
Dimensional tolerances of rubber rollers
HG/T2413.1
Determination of apparent hardness of rubber rollers by Zhao (PJ) hardness tester methodHG/T2413.2Determination of apparent hardness of rubber rollers by Shore hardness tester methodHG/T 2450
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 and size (nominal diameter × nominal length), number of this standard 3.1.2 Marking example
The papermaking rubber roller with rubber international hardness of 85, nominal diameter of 250mm and nominal length of 1600mm is marked as: a.
Papermaking rubber roller 85IR HD250×1600HG/T2446b. The papermaking rubber roller with Shore A hardness of 85, nominal diameter of 250mm and nominal length of 1600mm is marked as: Papermaking rubber roller 85A250×1600HG/T2446 Zhao (PJ) hardness of 35, nominal diameter of 250mm and nominal length of 1600mm is marked as: c.
Papermaking rubber roller 35P.J250×1600HG/T24463.2 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 and implemented on July 1, 1994
Technical requirements
Hardness requirements:
4.1.1 Hardness regulations:
HG/T 2446-93
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 hardness of rubber (IRHD);
Shore hardness (A);
PJ.
Hardness tolerance and hardness difference with the same root shall be as specified in Table 1. 4. 1. 2
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. 40
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 properties of other hardness ranges shall be negotiated and determined by the supply and demand parties. 290
Tensile strength, MPa
Elongation at break, %
Permanent set at break, %
Hot air aging (70'℃×72h)
Akron abrasion, cm2
Acid resistance test, 10%H2SO (room temperature×168h)Alkali resistance test, 10%Na0H (room temperature×168h)Item
HG/T 2446—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 the hardness tolerance shall not be less than the hardness tolerance of the rubber roller.
4.3 Dimension tolerance:
4.3.1 When the ratio of the length of the rubber roller coating to the diameter of the roller core is within 15 times, the diameter deviation and the length deviation of the coating shall be as specified in Table 3. If they cannot meet the requirements of the purchaser, the supply and demand parties shall select the grade specified in GB/T9896. 4.3.2 The roundness, 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. Table 3
Diameter of rubber roller
>100～160
>160～~250
≥250～400
>400~~630
Diameter deviation
Length of coated rubber
>1 000~1 600
>1 600～2 500
>2 500
Length of coated rubber deviation
The thickness of the rubber layer 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. 4.4
The rubber layer of the rubber roller should be firmly bonded to the metal core, and there should be no delamination or cracking. 4.5
The surface processing of the rubber roller should reach the fine grinding level unless otherwise specified. 4.6
The surface quality of the 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, sand holes and other defects shall be selected by the supply and demand parties according to the different needs of the rubber roller and the provisions of Article 2.1.2 of the classification of the surface quality of rubber rollers in GB/T9895. Appropriate levels. Note: Article 2.1.1 of GB/T9895 states that "the geometric shape of any 0.1m2 area shall be a square area. 4.8 The technical conditions of the metal core for rubber rollers shall comply with the provisions of Appendix A. 5 Test methods
5.1 Determination of physical properties of rubber materials
5.1.1 The determination of tensile strength, elongation at break and permanent deformation at break of rubber materials shall be carried out in accordance with the provisions of GB/T528, using type 1 test specimens. 291
HG/T 2446—93
5.1.2 The hot air aging test of rubber shall be carried out in accordance with the provisions of GB/T3512. 5.1.3 The abrasion resistance of rubber shall be measured in accordance with the provisions of GB/T1689. 5.1.4 The acid and alkali resistance of rubber shall be measured in accordance with the provisions of GB/T1690. 5.2 The apparent hardness of rubber roller shall be measured
5.2.1 The Shore A hardness shall be measured in accordance with the provisions of HG/T2413.2. 5.2.2 The international hardness of rubber shall be measured in accordance with the provisions of HG/T2450. 5.2.3 The PJ hardness test shall be carried out in accordance with the provisions of HG/T2413.1. 5.2.4 Hardness requirements shall be carried out in accordance with the provisions of GB/T9894. 5.3 Rubber roller specifications and deviation measurements
shall be carried out in accordance with the provisions of GB/T9896.
5.4 Rubber roller rubber layer thickness measurement
shall be carried out in accordance with the provisions of 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 shall be checked by tapping with a small hammer.
5. 6 Rubber roller surface processing measurement
Perform according to the provisions of GB/T9895.
5.7 Rubber roller surface quality inspection
Perform with measuring tools and visual inspection.
6 Inspection rules
6.1 Factory inspection
6.1.1 The hardness deviation and hardness difference of the same roller, diameter deviation, coating rubber layer length deviation, delamination between the coating rubber layer 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 shall be inspected. Unqualified products. 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 tested once every quarter. If one of the physical properties of the rubber material is unqualified, double the number of samples should be taken for retest of the unqualified item. If the retest result is still unqualified, the rubber material is unqualified during this period. Marking, packaging, storage, transportation
7.1 Each rubber roller shall have the following marks:
manufacturing unit;
b. mark;
trademark;
manufacturing date;
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, and the distance between the inner wall of the box and the rubber roller shall not be 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 shall be marked with the sending unit, manufacturing unit, product name and "handle with care" and "upward" marks. 7.4 For rubber rollers shipped to cold areas with a temperature of -10~~0℃, the wooden box shall be lined with moisture-proof paper and filled with insulation materials. For rubber rollers transported to severely cold areas below -10℃, corresponding insulation measures must be taken.
HG/T2446-93
7.5 During storage and transportation, rubber rollers should be kept away from direct sunlight, rain and snow, and should not be in contact with acids, alkalis, oils and organic solvents, and should be kept 2m away from heat sources.
7.6 Rubber rollers should be stored indoors at 0~~35℃ and relative humidity below 85%. The rubber layer of the rubber roller should not be under pressure. During storage, it should be rotated 180° every 1 month.
7.7 Under the above conditions, the performance of the rubber rollers should comply with the provisions of this standard within a storage period of no more than 9 months from the date of manufacture. 8 Usage requirements
8.1 Rubber rollers are allowed to be used in media with a temperature not exceeding 80℃ and an acid or alkali concentration not exceeding 10%. 8.2 Rubber rollers should not be under pressure when not in operation. 8.3 When the rubber roller starts to run, it should be gradually and evenly pressurized. 8.4 The extrusion load of the rubber roller during operation shall not exceed 500N/cm. 8.5 If the surface of the rubber roller is slightly wrinkled, cracked or uneven during use, it should be removed in time, processed, ground and trimmed to meet the technical requirements for use.
A1 Technical requirements for metal cores
HG/T2446-93
Appendix A
Technical conditions 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 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 roller core made of steel pipe and steel plate is specified in Table A1.
Metal core nominal diameter
≤100
>100～250
>250～500
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. A1.43
Metal core nominal diameter
≤100
Thread depth
A1.5Both ends of the cast iron hollow roller core must be through-holes, and the diameter of the holes should not be less than 20mm; when used, they should be blocked with flat head screws. 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 places per square meter of surface. However, electric welding or blue lead shall not be used. A1.7 Both ends of the metal core shaft must have a center hole. In order to avoid mechanical damage during manufacturing and processing, the metal core shaft neck does not need to be finely processed in advance.
A1.8 The shaft neck length at both ends of the metal core should be greater than 100mm. A1.9 The requirements for static imbalance of the metal core shall be agreed upon by the supplier and the buyer. A2 Test method
A2.1 The specifications and dimensions of the metal core are measured with measuring tools such as calipers and tape measures. A2.2 The surface quality of the metal core is inspected by visual inspection and measuring tools. A2.3 Determination of static imbalance of the 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 shaft neck of the metal core 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.
Additional Notes:
HG/T2446-93
This standard was 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 Product Design Institute. This standard was drafted by Beijing Rubber Product Design Institute and Shenyang Rubber Product Factory. The main drafters of this standard are Wang Shuzhen and Liu Zongwen. From the date of implementation of this standard, the original national standard GB9897-88 "Technical Conditions for Papermaking Rubber Rollers" will be invalid. 2953 Static imbalance measurement 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 measured.
Additional instructions:
HG/T2446-93
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 Shenyang Rubber Products Factory. The main drafters of this standard are Wang Shuzhen and Liu Zongwen. From the date of implementation of this standard, the original national standard GB9897-88 "Technical Conditions for Papermaking Rubber Rollers" will be invalid. 2953 Static imbalance measurement 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 measured.
Additional instructions:
HG/T2446-93
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 Shenyang Rubber Products Factory. The main drafters of this standard are Wang Shuzhen and Liu Zongwen. From the date of implementation of this standard, the original national standard GB9897-88 "Technical Conditions for Papermaking Rubber Rollers" will be invalid. 295
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