CN112679850A - Elevator rope core with high strength and low elongation performance and preparation method thereof - Google Patents
Elevator rope core with high strength and low elongation performance and preparation method thereof Download PDFInfo
- Publication number
- CN112679850A CN112679850A CN202011546025.3A CN202011546025A CN112679850A CN 112679850 A CN112679850 A CN 112679850A CN 202011546025 A CN202011546025 A CN 202011546025A CN 112679850 A CN112679850 A CN 112679850A
- Authority
- CN
- China
- Prior art keywords
- rope
- core
- rope core
- elevator
- high strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title abstract description 11
- -1 polypropylene Polymers 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- 239000004743 Polypropylene Substances 0.000 claims abstract description 17
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 17
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- 229920001155 polypropylene Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims description 12
- 238000007654 immersion Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004519 grease Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000010009 beating Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 230000009347 mechanical transmission Effects 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- 239000008187 granular material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 56
- 239000010959 steel Substances 0.000 abstract description 56
- 244000025254 Cannabis sativa Species 0.000 abstract description 15
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 abstract description 10
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 abstract description 10
- 235000009120 camo Nutrition 0.000 abstract description 10
- 235000005607 chanvre indien Nutrition 0.000 abstract description 10
- 239000011487 hemp Substances 0.000 abstract description 10
- 230000007547 defect Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 8
- 235000017414 Canapa Nutrition 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 238000009661 fatigue test Methods 0.000 description 26
- 244000198134 Agave sisalana Species 0.000 description 23
- 238000012360 testing method Methods 0.000 description 16
- 238000011068 loading method Methods 0.000 description 7
- 235000011624 Agave sisalana Nutrition 0.000 description 4
- 241001246312 Otis Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000019771 cognition Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005491 wire drawing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Abstract
The invention relates to an elevator rope core with high strength and low elongation performance and a preparation method thereof. The elevator rope core with high strength and low elongation performance comprises the following raw materials: polypropylene, polyethylene, a hardening agent and an antioxidant. Compared with the common hemp core rope, the elevator rope core has stronger supporting force, smaller elongation and higher elastic modulus value, the oil content is 4-10%, the elevator rope core is between the steel core rope and the hemp core rope, has more oil consumption than a half steel core rope and a steel core rope, and has lower maintenance cost and longer maintenance period. The steel core rope has the advantages of ultra-low elongation and ultra-high rigid supporting force, avoids the defects of heavy weight of the steel core, high manufacturing process difficulty and wire breaking risk, and also overcomes the defects of insufficient supporting force, uneven diameter of the rope core, inconsistent local linear density and short service life of the hemp core rope. The preparation method has the advantages of easily controlled process, simple and convenient operation and contribution to large-scale production.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to an elevator rope core with high strength and low elongation performance and a preparation method thereof.
Background
As is well known, elevator steel wire ropes are products formed by processing steel wires, grease and rope cores through a plurality of complex processes, people have long focused attention on the steel wires and related manufacturing processes (sequentially comprising wire coiling, acid pickling, wire drawing, heat treatment, water tank wire drawing, stranding and rope stranding processes), and neglected the development and research of another core component, namely the rope core, which is very important to the fatigue life of the elevator steel wire ropes.
At present, rope cores adopted by elevator steel wire ropes are mainly sisal rope cores, semi-steel rope cores and steel rope cores, wherein the sisal rope cores are used for the most.
The sisal rope core has the advantages of excellent oil storage performance and better supporting force, but the defects are also obvious: the diameter uniformity of the rope core is poor, the density of the local rope core is uneven, and most products can only be used for common elevator with the elevator speed of less than or equal to 2.0 m/s. The biggest disadvantage is that the common sisal rope core is difficult to meet the best quality requirement of the elevator rope.
The semi-steel rope core and the steel rope core greatly improve the defects of the sisal rope core, and can meet the requirement that the elevator speed is more than or equal to 2.5 m/s. But has the following disadvantages: because the oil content of the rope core is low (about 3 percent), the situation of broken filaments and strands often occurs, the maintenance cost of the elevator in use is increased, and the maintenance period is shortened. Moreover, the steel rope core has overlarge self weight and overhigh manufacturing cost, thus increasing the configuration requirement of the elevator power system.
Therefore, the technical scheme of the invention is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an elevator rope core with high strength and low elongation performance and a preparation method thereof.
The invention provides an elevator rope core with high strength and low elongation performance, which comprises the following raw materials: polypropylene, polyethylene, a hardening agent and an antioxidant.
Preferably, the elevator rope core with high strength and low elongation performance comprises the following raw materials in parts by weight: 65-75 parts of polypropylene, 15-25 parts of polyethylene, 4-9 parts of a hardening agent and 0.5-1 part of an antioxidant.
Preferably, the elevator rope core with high strength and low elongation performance comprises the following raw materials in parts by weight: 70 parts of polypropylene, 20 parts of polyethylene, 6.5 parts of hardening agent and 0.75 part of antioxidant.
Preferably, the polypropylene is PPK 1708.
Preferably, the specification model of the polyethylene is PPS 1003.
Preferably, the antioxidant is 1010 in specification.
Preferably, the antioxidant is 168 gauge.
Based on the same technical concept, the invention further provides a preparation method of the elevator rope core with high strength and low elongation performance, which comprises the following steps:
(1) and (3) granulation: mixing the raw materials, stirring uniformly, and extruding into granules to obtain raw material particles;
(2) drawing: heating and melting the raw material particles in the step (1), and sequentially performing extrusion, spinning and stretching processes to obtain fiber yarns;
(3) rope core combining: putting the cellosilk obtained in the step (2) into a rope combining machine for combining ropes to obtain a rope core intermediate;
(4) oil immersion: and (4) immersing one end of the rope core intermediate obtained in the step (3) into an elevator grease oil groove for oil immersion, and then performing mechanical transmission and shaft beating to form a finished elevator rope core.
Preferably, in the step (1), the rotation speed of stirring is 60-80 r/min, and the stirring time is 30-40 min.
Preferably, in the step (2), the temperature for heating and melting is 180-240 ℃.
The research and development ideas applied by the invention are as follows:
the applicant has obtained the formulation of the present invention through the research on the third generation formulation, first:
the formula of the first generation elevator rope core is polypropylene and polyethylene, and the fatigue test is carried out on the first generation elevator rope core, and the result is as follows: after 60 ten thousand times of fatigue, the number of broken filaments in the worst twist pitch is 8, the broken filament position at the loading section of 1 meter after the fatigue test is 12, and the elongation after the fatigue is 0.24%. The results are not as good as those of sisal rope core elevator rope manufacturers with the same strength grade of the first and second wire brands in the level of selling random products. (the test results are shown in Table 1)
The formula of the second generation elevator rope core is polypropylene, polyethylene, a reinforcing agent, a binding agent and an antioxidant, and the second generation elevator rope core is subjected to fatigue test, and the result is as follows: after 60 ten thousand times of fatigue, the number of broken filaments in the worst twist pitch is 2-4, the broken filament position at a loading section of 1 meter after the fatigue test is 1-8, and the elongation after the fatigue is 0.15-0.16%. This result is superior to the level of random product real estate on sale by most sisal cord manufacturers of the same strength grade of the first line brand. (the test results are shown in Table 1)
The formula of the third-generation elevator rope core (namely the elevator rope core invented by the application) comprises polypropylene, polyethylene, a hardening agent and an antioxidant, and the fatigue test is carried out on the formula, and the result is as follows: after 60 ten thousand times of fatigue, the number of broken filaments in the worst twist pitch is equal to 0, the broken filament position at a loading section of 1 meter in the fatigue test is equal to 0, and the elongation after the fatigue is equal to 0.15%. This result is superior to the level of all line brands with the same strength grade sisal cord core manufacturers selling random products.
(the test results are shown in Table 1)
In addition, after 60 ten thousand fatigue tests, the third generation elevator rope core and the sisal rope core are disassembled, as shown in fig. 1-6, and as can be seen from fig. 1 and 2, the elevator rope core (3-strand structure) of the invention has no fiber breakage after strand splitting, and has excellent performance; as can be seen from figures 3, 4, 5 and 6, no matter the rope core is a sisal hemp rope core, a 3-strand structure or a 4-strand structure, yarn breakage occurs after strand removal, and the elevator rope core performance is superior to that of the sisal hemp rope core.
Secondly, the environmental resistance performance is tested, and as can be seen from fig. 7, under the condition of room temperature, when the tensile force is constant, the elongation of the rope core of the first-generation elevator is maximum, and the performance is worst; the third generation elevator rope core (the elevator rope core invented by the application) has the minimum elongation and the best performance; the performance of the second generation elevator rope core and the south-through Dada sisal rope core are in the middle;
as can be seen from FIG. 8, the tensile properties of the second generation elevator rope core are close to the properties of the natural sisal rope core at room temperature (20 ℃) and at low temperature (-25 ℃) and are inferior to the properties of the natural sisal rope core at high temperature (45 ℃); the tensile property of the third-generation elevator rope core is superior to that of the room-temperature natural sisal rope core at all applicable environmental temperatures (-25 ℃, 20 ℃ and 45 ℃).
Finally, the rope cores of different types are subjected to breaking tension tests, and the results show that:
the rope core of the natural sisal hemp is less than or equal to 3300N; the rope core of the first-generation elevator is less than or equal to 3290N, which is equivalent to the breaking force of the whole rope of the natural sisal rope core; the rope core of the second-generation elevator is not more than 4392N and is greater than the breaking force of the whole rope of the natural sisal rope core; the third generation elevator rope core (namely the elevator rope core invented by the application) is not less than 4897-6470N, and is obviously superior to the breaking force of the whole rope of the natural sisal hemp rope core.
In conclusion, the elevator rope core has the most excellent performance through a fatigue test, a temperature resistance test and a breaking tension test.
The elevator rope core is mainly made of polyethylene and polypropylene, takes the polypropylene as a main element and takes the polyethylene as an auxiliary element; in order to achieve high elastic modulus value and ultra-low elongation, a hardening agent must be added; meanwhile, an antioxidant must be added for anti-aging requirements.
The detection project in the national standard GB/T8903 is more focused on monitoring the inherent quality of steel wires, and the 'worst twist distance internal broken wire number' after OTIS 60 ten thousand times of fatigue is more focused on the evaluation of a host machine factory and elevator rope customers on the service life of the elevator ropes. According to the detection result of the national standard GB8903, a group of stranding test samples with excellent mechanical properties necessarily correspond to a very ideal result of a fatigue life test, and similarly, according to the requirements of a host factory and an elevator rope client, a very ideal result of a fatigue life test also necessarily corresponds to a stranding test with excellent mechanical properties. And should not occur in the event that there are a number of steel wires in the breakout test that exceed or fall below the gauge. The applicant finds out in the fatigue test results of random products of various known manufacturers, and the test results greatly subvert the cognition of people on the service life evaluation of the elevator ropes in the past. The national standard GB/T8903 and the main machine factory and the elevator rope client cannot form one-to-one correspondence, and the root is that the evaluation and constraint conditions of a core component rope core which has an extremely important influence on the fatigue life of the elevator rope are lacked in the middle.
For example: the applicant tested first, second and third generation elevator rope cores (invented elevator rope core in this application) and a large number of existing commercial products, as shown in table 1. The top rope and the west-ao sample hemp core rope are test samples provided for the Hangzhou west-ao elevator, the best domestic Shanghai steel high-quality wire rod is adopted as the raw material, the finally configured inner and outer layer steel wires are subjected to strand splitting mechanical property screening, the performance discreteness of the steel wires is very small, the steel wire performance discreteness is superior to the quality of the material objects of most of the manufacturers selling first-line brand elevator ropes, but the worst lay length and the broken filament number are not ideal after 60 ten thousand fatigue tests. 3 test samples of the hemp core rope sold in the product do not meet the fatigue test requirement of a host factory (the worst twist distance broken filaments are less than or equal to 4), and one sample has excellent mechanical properties of the split (4 strands) steel wire, but the rope core wire density is insufficient, the supporting force is poor, and the fatigue test result is poor (namely 'rope hemp core rope').
On the premise that all process conditions are unchanged, after the second-generation elevator rope core is replaced, a common wire rod lower than saddle steel (sand steel) is adopted, the matched rope steel wires are not screened in any mechanical property, 3 of 4 samples have a plurality of low-value steel wires, but the 'worst lay length wire breakage number' after 60 ten thousand times of fatigue is superior to that of the sample rope. It is emphasized that especially after the third generation elevator rope core (the rope core invented by the present application) is adopted, the 'worst twist pitch yarn breakage number' after 60 ten thousand times of fatigue realizes '0 yarn breakage', the result is superior to the quality of all elevator rope objects sold in the same strength grade of the first line brand, and the real test data result is the best interpretation of the elevator rope core technology and subverts the cognition of people on the elevator rope quality control concept in the past.
TABLE 1 statistics of key data after OTIS fatigue of various elevator ropes
(continuation table 1)
Note: the second generation elevator core rope-1, the second generation elevator core rope-2, the second generation elevator core rope-3 and the second generation elevator core rope-4 are elevator ropes (the same below) made of the same material and in different groups.
After a large number of data tests, the rich conclusions can be drawn from table 1:
(1) the main factors determining the fatigue life of the elevator rope are the rope core, the grease and the steel wire.
(2) The broken filaments in the loading section of 1 meter and the worst lay length after 60 ten thousand times of fatigue of the second generation elevator core rope are mostly slight broken filaments (1), the broken filaments in the loading section of 1 meter and the worst lay length after 60 ten thousand times of fatigue of the common hemp core rope and the semi-steel core rope are slightly broken filaments (1), and the broken filaments in the loading section of 1 meter and the worst lay length after 60 ten thousand times of fatigue of the common hemp core rope and the semi-steel core rope are common broken filaments (2) and dense broken filaments (3 and 4), and the number of the broken filaments at the loading section of 1 meter after the fatigue test indicates how many broken filaments are likely to be formed in the practical use of the product, namely, under the same condition, the second generation elevator core rope has smaller probability of filament breakage and strand breakage in the practical use process than the hemp core rope and the semi-steel core rope, and the third generation elevator core rope has no filament breakage condition, and has more excellent performance.
(3) Under the same bearing condition, the second generation elevator core rope and the third generation elevator core rope have stronger supporting force, smaller elongation and higher elastic modulus value than the common hemp core rope, and because the oil content of the second generation elevator core rope and the third generation elevator core rope is 4-10%, the second generation elevator core rope and the third generation elevator core rope are arranged between the steel core rope and the hemp core rope, the second generation elevator core rope and the third generation elevator core rope have more oil consumption than the half steel core rope and the steel core rope, lower maintenance cost and longer maintenance period. The steel core rope has the advantages of ultra-low elongation and ultra-high rigid supporting force, avoids the defects of the steel core rope (the steel core is heavy in weight, the manufacturing process is difficult, and the risk of wire breakage is high), and solves the defects of the hemp core rope (the supporting force is insufficient, the diameter of the rope core is not uniform, the local linear density is not uniform, and the service life is short).
Further, the applicant has studied the correspondence between the rope core supporting ability and the performance of the steel wire and the fatigue test results, and the results are shown in table 2.
TABLE 2 rope core support ability and steel wire performance and fatigue test result corresponding relation
(continuation table 2)
(continuation table 2)
A rich conclusion can also be drawn from table 2:
(1) after the steel wire rope is fatigued, the number of broken wires is related to the supporting capacity of the rope core, and the rope core with excellent supporting force has fewer broken wires than the rope core with insufficient supporting force.
(2) The broken filament forms (slight broken filament, common broken filament and dense broken filament) after fatigue are related to the rope core supporting capacity, the rope core with more excellent supporting force usually only forms slight broken filament, and the rope core with poorer supporting force can also form common broken filament and dense broken filament besides the slight broken filament.
(3) The rope core with excellent supporting force can contain the insufficiency of the performance of partial steel wires (the steel wires with low value of torsion value are more than 10 times). Namely, a better fatigue test result can be still achieved when a certain number of low-value torsion steel wires exist in the steel wire rope.
(4) The rope core with excellent supporting force can not contain the performance deficiency of all steel wires, and when the torsion value is abnormally low (<5 times) and a certain number of low-value steel wires exist, the OTIS 60 ten thousand times fatigue test result is also poor.
(5) The rope core with poor supporting force can not obtain good fatigue test results, no matter whether the steel wire is qualified or excellent.
(6) When the steel wire performance is qualified but not very excellent (larger discreteness exists), no matter the steel wire rope with strong rope core supporting force or strong rope core supporting force, the broken wire number or the fatigue test result after fatigue can present certain randomness and contingency, namely: a steel cord with better steel properties does not necessarily have a more desirable fatigue test result than a steel cord with poorer properties.
The invention has the beneficial effects that:
1. compared with the common hemp core rope, the elevator rope core has stronger supporting force, smaller elongation and higher elastic modulus value, the oil content is 4-10%, the elevator rope core is between the steel core rope and the hemp core rope, has more oil consumption than a half steel core rope and a steel core rope, and has lower maintenance cost and longer maintenance period. The steel core rope has the advantages of ultra-low elongation and ultra-high rigid supporting force, avoids the defects of heavy weight of the steel core, high manufacturing process difficulty and wire breaking risk, and also overcomes the defects of insufficient supporting force, uneven diameter of the rope core, inconsistent local linear density and short service life of the hemp core rope.
2. The preparation method of the elevator rope core has the advantages of easily controlled process, simple and convenient operation and contribution to large-scale production.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a real object diagram of an elevator rope core (3-strand structure) of the invention after 60 ten thousand fatigue tests.
Fig. 2 is a practical drawing of the elevator rope core (3-strand structure) after 60 ten thousand fatigue tests.
Fig. 3 is a physical diagram of sisal cord (4-strand structure) after 60 ten thousand fatigue tests.
Fig. 4 is a drawing of a practical sample of the sisal rope core (4-strand structure) after 60 ten thousand fatigue tests.
Fig. 5 is a physical diagram of sisal cord (3-ply structure) after 60 ten thousand fatigue tests.
Fig. 6 is a drawing of a practical sample of the sisal rope core (3-strand structure) after 60 ten thousand fatigue tests.
FIG. 7 is a plot of tensile force versus elongation for different types of cord cores having a diameter of 6.6mm at room temperature.
FIG. 8 is a plot of tensile force versus elongation for different types of cord having a diameter of 6.6mm at different temperatures.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a preparation method of an elevator rope core with high strength and low elongation performance, which comprises the following steps:
(1) and (3) granulation: 6500g of polypropylene with the commercial number of PPK1708, 1500g of polyethylene with the commercial number of PPS1003, 400g of hardening agent and 50g of antioxidant with the commercial number of 1010 are mixed and stirred for 30min under the condition of 60r/min and extruded into particles to obtain raw material particles;
(2) drawing: heating the raw material particles in the step (1) to 180 ℃ for melting, and sequentially performing extrusion, spinning and stretching processes to obtain fiber yarns;
(3) rope core combining: putting the cellosilk obtained in the step (2) into a rope combining machine for combining ropes to obtain a rope core intermediate;
(4) oil immersion: and (4) immersing one end of the rope core intermediate obtained in the step (3) into an elevator grease oil groove for oil immersion, and then performing mechanical transmission and shaft beating to form a finished elevator rope core.
Example 2
The embodiment provides a preparation method of an elevator rope core with high strength and low elongation performance, which comprises the following steps:
(1) and (3) granulation: mixing 7500g of polypropylene (PPK 1708, trade name), 2500g of polyethylene (PPS 1003, trade name), 900g of hardening agent and 100g of antioxidant (168, trade name) at 80r/min, stirring for 40min, and extruding into granules to obtain raw material particles;
(2) drawing: heating the raw material particles in the step (1) to 240 ℃ for melting, and sequentially performing extrusion, spinning and stretching processes to obtain fiber yarns;
(3) rope core combining: putting the cellosilk obtained in the step (2) into a rope combining machine for combining ropes to obtain a rope core intermediate;
(4) oil immersion: and (4) immersing one end of the rope core intermediate obtained in the step (3) into an elevator grease oil groove for oil immersion, and then performing mechanical transmission and shaft beating to form a finished elevator rope core.
Example 3
The embodiment provides a preparation method of an elevator rope core with high strength and low elongation performance, which comprises the following steps:
(1) and (3) granulation: 7000g of polypropylene with the commercial number of PPK1708, 2000g of polyethylene with the commercial number of PPS1003, 650g of hardening agent and 75g of antioxidant with the commercial number of 1010 are mixed and stirred for 35min under the condition of 70r/min and extruded into particles to obtain raw material particles;
(2) drawing: heating the raw material particles in the step (1) to 210 ℃ for melting, and sequentially performing extrusion, spinning and stretching processes to obtain fiber yarns;
(3) rope core combining: putting the cellosilk obtained in the step (2) into a rope combining machine for combining ropes to obtain a rope core intermediate;
(4) oil immersion: and (4) immersing one end of the rope core intermediate obtained in the step (3) into an elevator grease oil groove for oil immersion, and then performing mechanical transmission and shaft beating to form a finished elevator rope core.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An elevator rope core with high strength and low elongation performance is characterized by comprising the following raw materials: polypropylene, polyethylene, a hardening agent and an antioxidant.
2. The elevator rope core with high strength and low elongation property according to claim 1, characterized by comprising the following raw materials in parts by weight: 65-75 parts of polypropylene, 15-25 parts of polyethylene, 4-9 parts of a hardening agent and 0.5-1 part of an antioxidant.
3. The elevator rope core with high strength and low elongation property according to claim 2, characterized by comprising the following raw materials in parts by weight: 70 parts of polypropylene, 20 parts of polyethylene, 6.5 parts of hardening agent and 0.75 part of antioxidant.
4. The elevator rope core with high strength and low elongation performance as claimed in any one of claims 1 to 3, wherein the polypropylene is PPK 1708.
5. The elevator rope core with high strength and low elongation performance as claimed in any one of claims 1 to 3, wherein the polyethylene is PPS 1003.
6. The elevator rope core with high strength and low elongation property as claimed in any one of claims 1 to 3, wherein the antioxidant is 1010 gauge.
7. The elevator rope core with high strength and low elongation property as claimed in any one of claims 1 to 3, wherein the antioxidant is 168.
8. The method for preparing an elevator rope core with high strength and low elongation performance as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) and (3) granulation: mixing the raw materials, stirring uniformly, and extruding into granules to obtain raw material particles;
(2) drawing: heating and melting the raw material particles in the step (1), and sequentially performing extrusion, spinning and stretching processes to obtain fiber yarns;
(3) rope core combining: putting the cellosilk obtained in the step (2) into a rope combining machine for combining ropes to obtain a rope core intermediate;
(4) oil immersion: and (4) immersing one end of the rope core intermediate obtained in the step (3) into an elevator grease oil groove for oil immersion, and then performing mechanical transmission and shaft beating to form a finished elevator rope core.
9. The method for preparing an elevator rope core with high strength and low elongation property according to claim 8, wherein in the step (1), the rotation speed of the stirring is 60-80 r/min, and the stirring time is 30-40 min.
10. The method for preparing an elevator rope core with high strength and low elongation property according to claim 8, wherein the temperature of the heating and melting in the step (2) is 180-240 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546025.3A CN112679850A (en) | 2020-12-24 | 2020-12-24 | Elevator rope core with high strength and low elongation performance and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546025.3A CN112679850A (en) | 2020-12-24 | 2020-12-24 | Elevator rope core with high strength and low elongation performance and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112679850A true CN112679850A (en) | 2021-04-20 |
Family
ID=75451528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011546025.3A Pending CN112679850A (en) | 2020-12-24 | 2020-12-24 | Elevator rope core with high strength and low elongation performance and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112679850A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463165A (en) * | 2009-01-09 | 2009-06-24 | 咸阳石油钢管钢绳有限责任公司 | Special material for compact wire rope core and preparation of rope core |
| CN104044240A (en) * | 2014-06-20 | 2014-09-17 | 广东溢达纺织有限公司 | Injection molding rope head and preparation method thereof |
| CN105155316A (en) * | 2015-09-28 | 2015-12-16 | 江苏法尔胜泓昇集团有限公司 | Compound core steel wire rope for high-speed elevator and production method thereof |
| CN107099091A (en) * | 2016-02-23 | 2017-08-29 | 温州鑫泰新材料股份有限公司 | One kind enhancing hardening polypropylene material and preparation method thereof |
| CN108726321A (en) * | 2017-04-20 | 2018-11-02 | 奥的斯电梯公司 | Composite fibre tensional element for elevator system belt |
| US20200123703A1 (en) * | 2018-10-17 | 2020-04-23 | Thyssenkrupp Elevator Corporation | Method of reducing fretting of steel ropes and belts |
-
2020
- 2020-12-24 CN CN202011546025.3A patent/CN112679850A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463165A (en) * | 2009-01-09 | 2009-06-24 | 咸阳石油钢管钢绳有限责任公司 | Special material for compact wire rope core and preparation of rope core |
| CN104044240A (en) * | 2014-06-20 | 2014-09-17 | 广东溢达纺织有限公司 | Injection molding rope head and preparation method thereof |
| CN105155316A (en) * | 2015-09-28 | 2015-12-16 | 江苏法尔胜泓昇集团有限公司 | Compound core steel wire rope for high-speed elevator and production method thereof |
| CN107099091A (en) * | 2016-02-23 | 2017-08-29 | 温州鑫泰新材料股份有限公司 | One kind enhancing hardening polypropylene material and preparation method thereof |
| CN108726321A (en) * | 2017-04-20 | 2018-11-02 | 奥的斯电梯公司 | Composite fibre tensional element for elevator system belt |
| US20200123703A1 (en) * | 2018-10-17 | 2020-04-23 | Thyssenkrupp Elevator Corporation | Method of reducing fretting of steel ropes and belts |
Non-Patent Citations (1)
| Title |
|---|
| 刘瑞雪等, 河南大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101688359B (en) | Cable, combined cable made of plastic fibers and steel wire strands, and combined strands made of plastic fibers and steel wires | |
| CN102066653A (en) | Steel cord for reinforcement of rubber product and pneumatic tire using same | |
| CN208038906U (en) | A kind of steel wire rope composite fiber core | |
| CN108316028A (en) | A kind of steel wire rope composite fiber core and the preparation method and application thereof | |
| CN109082743B (en) | Super-light and soft comfortable polyester-nylon composite air-coated yarn | |
| JP6480092B1 (en) | Synthetic yarn cord made of organic fiber | |
| CN112679850A (en) | Elevator rope core with high strength and low elongation performance and preparation method thereof | |
| CN101736470A (en) | Polysulphonamide fiber cable type spinning method | |
| CN114507996B (en) | Ultra-high molecular weight polyethylene wear-resistant cable | |
| CN112725962B (en) | Process, equipment and application for sizing and twisting spread carbon fiber tows | |
| CN109797587B (en) | Steel wire rope composite sisal hemp rope core for elevator and preparation method thereof | |
| CN111395022A (en) | Light high-strength multi-core composite structure rope core and production method thereof | |
| CN204117614U (en) | Ultra-soft becomes lay automobile aluminum cable | |
| CN210104416U (en) | Composite construction strand compaction wire rope | |
| CN116556089A (en) | Steel wire rope composite rope core and preparation method thereof | |
| CN210151471U (en) | Steel cord and tire | |
| CN203602942U (en) | Rope core formed by synthetic fiber and steel wire rope with rope core | |
| CN112048854A (en) | Carbon fiber bundle for winding forming and preparation method and application thereof | |
| CN115449939B (en) | Sisal hemp/jute strand and preparation method thereof | |
| CN111648024A (en) | High-molecular polyethylene rope for ship and manufacturing method thereof | |
| CN201538924U (en) | Ultrahigh molecular weight polyethylene and steel wire composite abrasion-resistant rope | |
| CN114016317B (en) | High-performance rope core with composite structure and preparation method thereof | |
| CN213925632U (en) | Steel-plastic composite steel wire rope | |
| CN108547165B (en) | Composite fiber core steel wire rope and preparation method thereof | |
| CN112151206B (en) | Carbon fiber composite core wire and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210420 |
|
| RJ01 | Rejection of invention patent application after publication |