CN108081678B - Braided tube for forklift and manufacturing method thereof - Google Patents
Braided tube for forklift and manufacturing method thereof Download PDFInfo
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- CN108081678B CN108081678B CN201810003750.2A CN201810003750A CN108081678B CN 108081678 B CN108081678 B CN 108081678B CN 201810003750 A CN201810003750 A CN 201810003750A CN 108081678 B CN108081678 B CN 108081678B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 98
- 239000005060 rubber Substances 0.000 claims abstract description 98
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 22
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 22
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 11
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 11
- 230000002787 reinforcement Effects 0.000 claims abstract 3
- 239000000203 mixture Substances 0.000 claims description 47
- 230000003712 anti-aging effect Effects 0.000 claims description 40
- 239000003795 chemical substances by application Substances 0.000 claims description 40
- 239000011265 semifinished product Substances 0.000 claims description 27
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 20
- 238000009941 weaving Methods 0.000 claims description 16
- 239000006229 carbon black Substances 0.000 claims description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 13
- 235000021355 Stearic acid Nutrition 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 10
- 239000010692 aromatic oil Substances 0.000 claims description 10
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 10
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 10
- 239000008117 stearic acid Substances 0.000 claims description 10
- 229910052717 sulfur Inorganic materials 0.000 claims description 10
- 239000011593 sulfur Substances 0.000 claims description 10
- 239000011787 zinc oxide Substances 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 8
- 239000002904 solvent Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 235000012211 aluminium silicate Nutrition 0.000 claims description 5
- 239000003963 antioxidant agent Substances 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 2
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 abstract 2
- 238000004073 vulcanization Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/02—Layer formed of wires, e.g. mesh
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
- F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a braided tube for a forklift and a manufacturing method thereof, wherein the braided tube for the forklift sequentially comprises an inner rubber layer, a braided reinforcement part and an outer rubber layer from inside to outside, and the braided reinforcement part comprises at least one metal braided layer from inside to outside; the inner rubber layer is made of first blended rubber, the components of the first blended rubber at least contain butadiene-acrylonitrile rubber and styrene butadiene rubber, the outer rubber layer is made of second blended rubber, and the second blended rubber at least contains butadiene-acrylonitrile rubber, styrene butadiene rubber and butadiene rubber. The invention increases the strength, has good performances of friction resistance and fatigue aging resistance, and greatly prolongs the service life.
Description
Technical Field
The invention relates to a braided tube for a forklift and a manufacturing method thereof.
Background
At present, due to the particularity of application environment and use conditions of the braided tube for the forklift, a rubber tube bears certain pretension axially in the use process, a steel wire layer structure of a common steel wire braided hydraulic tube deforms under the pretension effect, physical and mechanical effects such as bending and friction frequently occur when the common steel wire braided hydraulic tube passes through a guide wheel, and early failure frequently occurs.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the braided tube for the forklift, which increases the strength of the braided tube, has good friction resistance and fatigue aging resistance, and greatly prolongs the service life of the braided tube.
In order to solve the technical problems, the technical scheme of the invention is as follows: a braided tube for a forklift sequentially comprises an inner rubber layer, a braided reinforcing part and an outer rubber layer from inside to outside, wherein the braided reinforcing part comprises at least one metal braided layer from inside to outside; the inner rubber layer is made of first blended rubber, the components of the first blended rubber at least contain nitrile rubber and styrene butadiene rubber, the outer rubber layer is made of second blended rubber, and the second blended rubber at least contains nitrile rubber, styrene butadiene rubber and butadiene rubber.
Further, the braided reinforcing portion includes one or two metal braided layers.
Further provides a specific composition of a first blended rubber, wherein the first blended rubber comprises the following components in parts by mass:
nitrile rubber: 60-90 parts;
styrene-butadiene rubber: 10-40 parts;
n550 carbon black: 40-60 parts;
calcined kaolin: 30-50 parts;
aromatic oil: 8-16 parts;
zinc oxide: 3-5 parts;
stearic acid: 2-3 parts of a solvent;
an anti-aging agent: 1-2 parts;
sulfur: 1-2 parts;
accelerator (b): 1-2 parts.
The anti-aging agent is an anti-aging agent 4020.
Further provides a specific composition of a second blended rubber, wherein the second blended rubber comprises the following components in parts by mass:
nitrile rubber: 30-70 parts;
styrene-butadiene rubber: 30-70 parts;
butadiene rubber: 10-20 parts;
n330 carbon Black: 60-90 parts;
white carbon black: 30-50 parts;
silane coupling agent: 3-5 parts;
zinc oxide: 3-5 parts;
stearic acid: 1-2 parts;
wear-resistant resin: 5-7 parts;
combined anti-aging agent: 3-5 parts;
protective wax: 3-5 parts;
aromatic oil: 8-15 parts;
plasticizer: 5-9 parts of a solvent;
sulfur: 2-3 parts of a solvent;
accelerator (b): 1-2 parts.
Further, the combined anti-aging agent comprises an anti-aging agent RD and an anti-aging agent 3100; wherein, the antioxidant RD: 2-3 parts of a solvent; anti-aging agent 3100: 1-2 parts.
Further, the accelerator is accelerator NS.
The invention also provides a manufacturing method of the braided tube for the forklift, which comprises the following steps:
(a) respectively preparing a component mixture of the first blended rubber and a component mixture of the second blended rubber, and providing a soft core;
(b) extruding and covering an inner rubber layer on the surface of the soft core by using an extruder and utilizing the component mixture of the first blended rubber;
(c) weaving the metal wires on the inner rubber layer in sequence according to the number of the metal wire strands, the thread pitch requirement and the metal wire weaving angle required by manufacturing to form each layer of metal weaving layer, thereby obtaining a first semi-finished product;
(d) extruding and covering an outer rubber layer on the outer surface of the first semi-finished product by using an extruder through component mixing of the second blended rubber to form a second semi-finished product;
(e) extruding a plastic layer on the outer surface of the second semi-finished product, and ensuring that the plastic layer wraps the whole second semi-finished product to form a third semi-finished product;
(f) vulcanizing the third semi-finished product;
(g) removing the plastic layer on the outer surface of the vulcanized third semi-finished product;
(h) and finally blowing out the soft core to obtain the required braided tube for the forklift.
Further, in step (b), the temperatures of the zones of the extruder are set to: the head temperature is 95-105 ℃, the screw temperature is 100-105 ℃, the temperature of the material cavity is 90-105 ℃, the extrusion speed is as follows: the braided tube for 8mm forklift is 160-220 ft/min; the braided tube for a fork truck with the thickness of 16mm is 80-100 ft/min; and/or in step (d) the temperature of each zone of the extruder is set as: the head temperature is 70-75 ℃, the screw temperature is 70-75 ℃, the temperature of the material cavity is 60-75 ℃, the extrusion speed is as follows: the 8mm braided tube for the forklift is 55-65 ft/min; the braided tube for 16mm forklift is 45-55 ft/min.
Further, in order to keep the shape of the pipe body from being obviously changed in the pressure bearing use process, in the step (c), the metal wire weaving angle α is less than 54.7 ℃, wherein the metal wire weaving angle is an included angle between the trend of the metal wire and the axial direction of the first semi-finished product.
After the technical scheme is adopted, the invention has the following beneficial effects:
1. the metal braided layer is positioned between the inner rubber layer and the outer rubber layer, the steel wire braided structure is adopted, and the surface of the steel wire can be provided with a copper plated layer which reacts with chemical components in the inner rubber layer and the outer rubber layer through vulcanization, so that good adhesive force between metal and rubber is provided, and the strength of the metal braided layer is improved.
2. The formula of the inner rubber layer and the outer rubber layer and the specific extrusion process enable the friction resistance and fatigue resistance of the product to be excellent.
Drawings
FIG. 1 is a schematic structural view of a first structure of a braided tube for a forklift according to the present invention;
FIG. 2 is a schematic structural view of a second structure of the woven tube for a forklift according to the present invention;
fig. 3 is a schematic structural view of the metal braid of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example one
A braided tube for a forklift sequentially comprises an inner rubber layer 1, a braided reinforcing part and an outer rubber layer 3 from inside to outside, wherein the braided reinforcing part comprises at least one metal braided layer 2 from inside to outside; the inner rubber layer 1 is made of first blended rubber, the components of the first blended rubber at least contain nitrile rubber and styrene butadiene rubber, the outer rubber layer 3 is made of second blended rubber, and the second blended rubber at least contains nitrile rubber, styrene butadiene rubber and butadiene rubber.
As shown in fig. 1, the braided reinforcing portion comprises a metal braid 2.
The first blended rubber comprises the following components in parts by mass:
nitrile rubber: 60 parts;
styrene-butadiene rubber: 10 parts of (A);
n550 carbon black: 40 parts of a mixture;
calcined kaolin: 30 parts of (1);
aromatic oil: 8 parts of a mixture;
zinc oxide: 3 parts of a mixture;
stearic acid: 2 parts of (1);
an anti-aging agent: 1 part;
sulfur: 1 part;
accelerator (b): 1 part.
The anti-aging agent is an anti-aging agent 4020.
The second blended rubber comprises the following components in parts by mass:
nitrile rubber: 30 parts of (1);
styrene-butadiene rubber: 30 parts of (1);
butadiene rubber: 10 parts of (A);
n330 carbon Black: 60 parts;
white carbon black: 30 parts of (1);
silane coupling agent: 3 parts of a mixture;
zinc oxide: 3 parts of a mixture;
stearic acid: 1 part;
wear-resistant resin: 5 parts of a mixture;
combined anti-aging agent: 3 parts of a mixture;
protective wax: 3 parts of a mixture;
aromatic oil: 8 parts of a mixture;
plasticizer: 5 parts of a mixture;
sulfur: 2 parts of (1);
accelerator (b): 1 part.
The combined anti-aging agent comprises an anti-aging agent RD and an anti-aging agent 3100; wherein, the antioxidant RD: 2 parts of (1); anti-aging agent 3100: 1 part.
The accelerator is accelerator NS.
A manufacturing method of a braided tube for a forklift comprises the following steps:
(a) respectively preparing a component mixture of the first blended rubber and a component mixture of the second blended rubber, and providing a soft core;
(b) extruding and covering the inner rubber layer 1 on the surface of the soft core by using an extruder and utilizing the component mixture of the first blended rubber; after the internal glue is extruded, the subsequent operation can be carried out after the internal glue is stopped for 8 hours;
(c) weaving metal wires on the inner rubber layer 1 in sequence according to the number of metal wire strands, the thread pitch requirement and the metal wire weaving angle required by manufacturing to form each layer of metal weaving layer 2, thereby obtaining a first semi-finished product;
(d) extruding and covering an outer rubber layer on the outer surface of the first semi-finished product by using an extruder through component mixing of the second blended rubber to form a second semi-finished product;
(e) extruding a plastic layer on the outer surface of the second semi-finished product, and ensuring that the plastic layer wraps the whole second semi-finished product to form a third semi-finished product; the plastic layer can be made of polypropylene, and the thickness of the plastic layer is 2.23-2.43 mm.
(f) Vulcanizing the third semi-finished product; the vulcanization treatment adopts a saturated steam one-step vulcanization molding mode, the saturated steam pressure is 3.0-3.1MPa, the vulcanization temperature is 151.7 ℃, and the vulcanization time is 45 min;
(g) removing the plastic layer on the outer surface of the vulcanized third semi-finished product; the step is completed by adopting a plastic stripping machine; the extrusion speed of the plastic layer is consistent with that of the outer rubber layer 3, and is 2-3 times of the vulcanization speed of the common binding band.
(h) Finally blowing out the soft core to obtain the required braided tube for the forklift; after the soft core is blown out, the leakage-free test can be carried out by adopting 2 times of hydrostatic working pressure.
In step (b), the temperatures of the zones of the extruder are set to: the head temperature is 95-105 ℃, the screw temperature is 100-105 ℃, the temperature of the material cavity is 90-105 ℃, the extrusion speed is as follows: the braided tube for 8mm forklift is 160-220 ft/min; the braided tube for the forklift with the thickness of 16mm is 80-100ft/min, specifically, the material cavity of the extruder in the step (b) is divided into a material cavity 1 area, a material cavity 2 area and a material cavity 3 area, the temperature of the material cavity 1 area is 90-100 ℃, the temperature of the material cavity 2 area is 95-105 ℃, and the temperature of the material cavity 3 area is 95-105 ℃; in step (d), the extruder zone temperatures are set as: the head temperature is 70-75 ℃, the screw temperature is 70-75 ℃, the temperature of the material cavity is 60-75 ℃, the extrusion speed is as follows: the 8mm braided tube for the forklift is 55-65 ft/min; the 16mm braided tube for the forklift is 45-55ft/min, specifically, the material cavity of the extruder in the step (d) is also divided into a material cavity 1 area, a material cavity 2 area and a material cavity 3 area, the temperature of the material cavity 1 area is 60-70 ℃, the temperature of the material cavity 2 area is 65-70 ℃, and the temperature of the material cavity 3 area is 70-75 ℃.
In the step (c), the metal wire weaving angle α is less than 54.7 ℃, wherein the metal wire weaving angle is an included angle between the trend of the metal wire and the axial direction of the first semi-finished product, the metal wire weaving angle is 54.7 degrees lower than the balance angle, the pipe body has a tendency of shrinking after bearing pressure, the tendency of shrinking is counteracted with the pretension force born by the pipe body when the pipe body is used, and the shape of the pipe body is kept from being obviously changed.
Example two
A braided tube for a forklift sequentially comprises an inner rubber layer 1, a braided reinforcing part and an outer rubber layer 3 from inside to outside, wherein the braided reinforcing part comprises at least one metal braided layer 2 from inside to outside; the inner rubber layer 1 is made of first blended rubber, the components of the first blended rubber at least contain nitrile rubber and styrene butadiene rubber, the outer rubber layer 3 is made of second blended rubber, and the second blended rubber at least contains nitrile rubber, styrene butadiene rubber and butadiene rubber.
As shown in fig. 2, the braided reinforcing portion comprises two metal braided layers 2.
The first blended rubber comprises the following components in parts by mass:
nitrile rubber: 90 parts of a mixture;
styrene-butadiene rubber: 40 parts of a mixture;
n550 carbon black: 60 parts;
calcined kaolin: 50 parts of a mixture;
aromatic oil: 16 parts of a mixture;
zinc oxide: 5 parts of a mixture;
stearic acid: 3 parts of a mixture;
an anti-aging agent: 2 parts of (1);
sulfur: 2 parts of (1);
accelerator (b): and 2 parts.
The anti-aging agent is an anti-aging agent 4020.
The second blended rubber comprises the following components in parts by mass:
nitrile rubber: 70 parts of (B);
styrene-butadiene rubber: 70 parts of (B);
butadiene rubber: 20 parts of (1);
n330 carbon Black: 90 parts of a mixture;
white carbon black: 50 parts of a mixture;
silane coupling agent: 5 parts of a mixture;
zinc oxide: 5 parts of a mixture;
stearic acid: 2 parts of (1);
wear-resistant resin: 7 parts;
combined anti-aging agent: 5 parts of a mixture;
protective wax: 5 parts of a mixture;
aromatic oil: 15 parts of (1);
plasticizer: 9 parts of (1);
sulfur: 3 parts of a mixture;
accelerator (b): and 2 parts.
The combined anti-aging agent comprises an anti-aging agent RD and an anti-aging agent 3100; wherein, the antioxidant RD: 3 parts of a mixture; anti-aging agent 3100: and 2 parts.
The accelerator is accelerator NS.
The method for manufacturing the knitted tube for a forklift according to the present embodiment is the same as that of the first embodiment.
EXAMPLE III
A braided tube for a forklift sequentially comprises an inner rubber layer 1, a braided reinforcing part and an outer rubber layer 3 from inside to outside, wherein the braided reinforcing part comprises at least one metal braided layer 2 from inside to outside; the inner rubber layer 1 is made of first blended rubber, the components of the first blended rubber at least contain nitrile rubber and styrene butadiene rubber, the outer rubber layer 3 is made of second blended rubber, and the second blended rubber at least contains nitrile rubber, styrene butadiene rubber and butadiene rubber.
As shown in fig. 1, the braided reinforcing portion comprises a metal braid 2.
The first blended rubber comprises the following components in parts by mass:
nitrile rubber: 75 parts of a mixture;
styrene-butadiene rubber: 25 parts of (1);
n550 carbon black: 50 parts of a mixture;
calcined kaolin: 40 parts of a mixture;
aromatic oil: 12 parts of (1);
zinc oxide: 4 parts of a mixture;
stearic acid: 2 parts of (1);
an anti-aging agent: 1 part;
sulfur: 2 parts of (1);
accelerator (b): 1 part.
The anti-aging agent is an anti-aging agent 4020.
The second blended rubber comprises the following components in parts by mass:
nitrile rubber: 50 parts of a mixture;
styrene-butadiene rubber: 50 parts of a mixture;
butadiene rubber: 15 parts of (1);
n330 carbon Black: 75 parts of a mixture;
white carbon black: 40 parts of a mixture;
silane coupling agent: 4 parts of a mixture;
zinc oxide: 4 parts of a mixture;
stearic acid: 2 parts of (1);
wear-resistant resin: 6 parts of (1);
combined anti-aging agent: 4 parts of a mixture;
protective wax: 4 parts of a mixture;
aromatic oil: 12 parts of (1);
plasticizer: 7 parts;
sulfur: 2 parts of (1);
accelerator (b): 1 part.
The combined anti-aging agent comprises an anti-aging agent RD and an anti-aging agent 3100; wherein, the antioxidant RD: 2 parts of (1); anti-aging agent 3100: and 2 parts.
The accelerator is accelerator NS.
The method for manufacturing the knitted tube for a forklift according to the present embodiment is the same as that of the first embodiment.
The basic physical properties of the inner rubber layer and the outer rubber layer of the knitted tube for the forklift prepared in the three embodiments are shown in the table I, and the properties of the finished tube are shown in the table II;
Watch two
It is found from tables one and two that the braided tubes for a forklift prepared in the above three examples satisfy the requirements.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The manufacturing method of the braided tube for the forklift is characterized in that the braided tube for the forklift sequentially comprises an inner rubber layer (1), a braided reinforcing part and an outer rubber layer (3) from inside to outside, wherein the braided reinforcing part comprises at least one metal braided layer (2) from inside to outside; the inner rubber layer (1) is made of first blended rubber, the components of the first blended rubber at least contain nitrile rubber and styrene butadiene rubber, the outer rubber layer (3) is made of second blended rubber, and the second blended rubber at least contains nitrile rubber, styrene butadiene rubber and butadiene rubber; wherein the content of the first and second substances,
the first blended rubber comprises the following components in parts by mass:
nitrile rubber: 60-90 parts;
styrene-butadiene rubber: 10-40 parts;
n550 carbon black: 40-60 parts;
calcined kaolin: 30-50 parts;
aromatic oil: 8-16 parts;
zinc oxide: 3-5 parts;
stearic acid: 2-3 parts of a solvent;
an anti-aging agent: 1-2 parts;
sulfur: 1-2 parts;
accelerator (b): 1-2 parts;
the second blended rubber comprises the following components in parts by mass:
nitrile rubber: 30-70 parts;
styrene-butadiene rubber: 30-70 parts;
butadiene rubber: 10-20 parts;
n330 carbon Black: 60-90 parts;
white carbon black: 30-50 parts;
silane coupling agent: 3-5 parts;
zinc oxide: 3-5 parts;
stearic acid: 1-2 parts;
wear-resistant resin: 5-7 parts;
combined anti-aging agent: 3-5 parts;
protective wax: 3-5 parts;
aromatic oil: 8-15 parts;
plasticizer: 5-9 parts of a solvent;
sulfur: 2-3 parts of a solvent;
accelerator (b): 1-2 parts;
the surface of the metal braided layer (2) is provided with a copper plating layer which is vulcanized to react with chemical components in the inner rubber layer and the outer rubber layer so as to provide adhesive force between the metal braided layer (2) and the inner rubber layer and the outer rubber layer respectively;
the method comprises the following steps:
(a) respectively preparing a component mixture of the first blended rubber and a component mixture of the second blended rubber, and providing a soft core;
(b) extruding and covering the inner rubber layer (1) on the surface of the soft core by using an extruder and utilizing the component mixture of the first blended rubber;
(c) weaving metal wires on the inner rubber layer (1) in sequence according to the number of metal wire strands, the thread pitch requirement and the metal wire weaving angle required by manufacturing to form each layer of metal weaving layer (2), thereby obtaining a first semi-finished product;
(d) extruding and covering an outer rubber layer (3) on the outer surface of the first semi-finished product by using an extruder and mixing the components of the second blended rubber to form a second semi-finished product;
(e) extruding a plastic layer on the outer surface of the second semi-finished product, and ensuring that the plastic layer wraps the whole second semi-finished product to form a third semi-finished product;
(f) vulcanizing the third semi-finished product;
(g) removing the plastic layer on the outer surface of the vulcanized third semi-finished product;
(h) finally blowing out the soft core to obtain the required braided tube for the forklift;
in step (b), the temperatures of the zones of the extruder are set to: the head temperature is 95-105 ℃, the screw temperature is 100-105 ℃, the temperature of the material cavity is 90-105 ℃, the extrusion speed is as follows: the braided tube for 8mm forklift is 160-220 ft/min; the braided tube for a fork truck with the thickness of 16mm is 80-100 ft/min; and/or in step (d) the temperature of each zone of the extruder is set as: the head temperature is 70-75 ℃, the screw temperature is 70-75 ℃, the temperature of the material cavity is 60-75 ℃, the extrusion speed is as follows: the 8mm braided tube for the forklift is 55-65 ft/min; the braided tube for a fork truck with the thickness of 16mm is 45-55 ft/min;
in the step (c), the weaving angle α of the metal wires is less than 54.7 ℃, wherein the weaving angle of the metal wires is an included angle between the trend of the metal wires and the axial direction of the first semi-finished product.
2. The manufacturing method according to claim 1, characterized in that: the braided reinforcement part comprises one or two metal braided layers (2).
3. The manufacturing method according to claim 1, characterized in that: the anti-aging agent is an anti-aging agent 4020.
4. The manufacturing method according to claim 1, characterized in that: the combined anti-aging agent comprises an anti-aging agent RD and an anti-aging agent 3100; wherein, the antioxidant RD: 2-3 parts of a solvent; anti-aging agent 3100: 1-2 parts.
5. The manufacturing method according to claim 1, characterized in that: the accelerator is accelerator NS.
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| CN201810003750.2A CN108081678B (en) | 2018-01-03 | 2018-01-03 | Braided tube for forklift and manufacturing method thereof |
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| CN108081678B true CN108081678B (en) | 2020-04-14 |
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| CN201992207U (en) * | 2010-10-26 | 2011-09-28 | 宝钢发展有限公司 | Improvement structure of hydraulic hose on sideslip oil cylinder of fork truck |
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| CN104086831A (en) * | 2014-07-02 | 2014-10-08 | 安徽宁国尚鼎橡塑制品有限公司 | Heat-resisting oil-resisting rubber material for automotive pipes |
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| CN105291455A (en) * | 2015-12-04 | 2016-02-03 | 沈阳赛亚橡胶制品有限公司 | Coating and vulcanizing method of rubber hose |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201992207U (en) * | 2010-10-26 | 2011-09-28 | 宝钢发展有限公司 | Improvement structure of hydraulic hose on sideslip oil cylinder of fork truck |
| CN104100783A (en) * | 2013-04-12 | 2014-10-15 | 漯河市亿博橡胶科技有限公司 | Ultra-high-pressure steel wire winding composite hose |
| CN103411051A (en) * | 2013-06-20 | 2013-11-27 | 天津市华荣气动液压成套设备有限公司 | Hydraulic hose with high strength |
| CN104086831A (en) * | 2014-07-02 | 2014-10-08 | 安徽宁国尚鼎橡塑制品有限公司 | Heat-resisting oil-resisting rubber material for automotive pipes |
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| CN108081678A (en) | 2018-05-29 |
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