CN116515177A - Railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and manufacturing method thereof - Google Patents
Railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and manufacturing method thereof Download PDFInfo
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- CN116515177A CN116515177A CN202310298869.8A CN202310298869A CN116515177A CN 116515177 A CN116515177 A CN 116515177A CN 202310298869 A CN202310298869 A CN 202310298869A CN 116515177 A CN116515177 A CN 116515177A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims description 64
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- 239000006229 carbon black Substances 0.000 claims description 27
- 238000004513 sizing Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 24
- 238000007599 discharging Methods 0.000 claims description 23
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- 239000003292 glue Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
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- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 238000004073 vulcanization Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 claims description 3
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
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- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
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- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
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- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000010074 rubber mixing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- 239000008117 stearic acid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 51
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- 238000009864 tensile test Methods 0.000 description 2
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
- B29B7/22—Component parts, details or accessories; Auxiliary operations
- B29B7/24—Component parts, details or accessories; Auxiliary operations for feeding
- B29B7/242—Component parts, details or accessories; Auxiliary operations for feeding in measured doses
- B29B7/244—Component parts, details or accessories; Auxiliary operations for feeding in measured doses of several materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
- C08K5/18—Amines; Quaternary ammonium compounds with aromatically bound amino groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
- C08K5/31—Guanidine; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3437—Six-membered rings condensed with carbocyclic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
- C08K5/46—Heterocyclic compounds having sulfur in the ring with oxygen or nitrogen in the ring
- C08K5/47—Thiazoles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
- E01B9/683—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material layered or composite
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of rail lower backing plate manufacture, in particular to a railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and a manufacturing method thereof.
Description
Technical Field
The invention relates to the technical field of manufacture of rail lower base plates, in particular to a railway stone dragon bridge low-resistance fastener rail lower elastic base plate and a manufacturing method thereof.
Background
In recent years, along with the rapid development of high-speed railways in China, higher requirements are put forward on the quality, standard and performance of products of elastic backing plates under rails, the elastic strip I-shaped fastener rail lower backing plates are applicable to railway lines with diameters of passenger and cargo collineation and curves not larger than 295m, ballasted track concrete sleeper 50kg/m of various railway stations, the elastic strip II-shaped fastener rail lower backing plates are applicable to railway lines with diameters of passenger and cargo collineation and curves not smaller than 295m, ballasted track concrete sleeper 60kg/m or 75kg/m of various railway stations, the existing elastic backing plates under rails cannot meet the construction requirements of railway stone bridge laying seamless lines, even influence railway safety transportation, in order to fill the blank of new products of the elastic backing plates under railway stone bridge small-resistance fastener rails, the elastic backing plates under railway stone bridge small-resistance fastener rails are realized on straight lines and curve sections with diameters of R not smaller than 800m by improving methods, running rails are 60kg/m, and guard rails are 50kg/m of railway lines, and meanwhile, the existing elastic backing plates under railway bridge small-resistance fastener rails are manufactured and the method is needed to meet the requirements of building of railway lines.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the railway stone dragon bridge small-resistance fastener rail lower elastic cushion plate is prepared from the following raw materials in parts by weight:
(1) Big material
38000g + -50 g of natural rubber
MT carbon black 9000g + -40 g
N330 carbon black 5000g + -40 g
N774 carbon black: 10000 g.+ -. 40g
4000g + -40 g white carbon black
(2) Small material
360g + -3 g of sulfur powder
350g + -3 g of accelerator D
Promoter CZ 520g + -3 g
170g + -15 g of accelerator DM
500g + -15 g of accelerator DTDM
700 g+/-3 g of anti-aging agent RD
300g + -3 g of anti-aging agent D
Anti-aging agent 4010NA of 700 g+ -3 g
1500g + -5 g zinc oxide
650 g+ -3 g stearic acid
Homogenizing agent D-4A 550g + -3 g
480g + -3 g of aluminum silicate
Silane coupling agent XG-669C 300g + -3 g
A manufacturing method of an elastic backing plate under a railway stone bridge small-resistance fastener rail comprises the following steps:
step S1, raw materials are prepared, wherein the raw materials are divided into raw rubber, large materials and small materials, raw material model specifications are placed in corresponding system-specified charging barrels and charging hoppers according to charging barrel and charging hopper capacities of a full-automatic batching system and weighing precision of corresponding automatic metering scales, raw material demand in each charging barrel is set according to system formula specified quantity, raw rubber dicing metering errors are +/-50 g when raw materials are proportioned, and sulfur is controlled to +/-5 g by adopting manual batching precision.
Step S2, automatic allocation of small materials is carried out, the small materials are proportioned by adopting a full-automatic batching system, a platform balance is provided with 12 independent raw material storage barrels, automatic quantitative weighing, platform balance supporting and one inch line conveying are carried out for proportioning through a PLC controller, each small material throwing precision is controlled to be +/-5 g, the total weighing precision is consistent with the sum of each small material precision and is controlled to be +/-50 g, after all metering materials are metered, the inch line starts a positive running lattice again, and automatic rechecking is carried out on each raw material storage barrel conveyed by the inch line. And finally, conveying the materials to a total amount checking scale through an inch line, carrying out small material compounding, controlling the checking scale accuracy within +/-50 g, waiting for a next instruction of a PLC (programmable logic controller) on a inch line conveying belt after checking, and automatically removing unqualified products after checking.
And S3, banburying, namely, using an internal mixer for banburying, wherein the setting of the banburying process is required to meet the automatic temperature control of the sizing material and the set sizing temperature during sizing discharging, and otherwise, judging that the sizing material of the vehicle is unqualified. The banburying reaches the process set temperature of 135+/-5 ℃, the PLC is adopted to automatically control the cooling circulation water quantity, the rotating speed of the internal mixer and the upper ram pressure to control the temperature, and firstly raw rubber is checked on a check scale and then signals are sent to the internal mixer. Secondly, feeding MT carbon black, N330 carbon black, N774 carbon black and white carbon black into an internal mixer through a PLC control scraper conveying cylinder, controlling each feeding precision of an upper auxiliary machine to be +/-200 g, and feeding signals to the internal mixer through the upper auxiliary machine when a batching hopper reaches a designated position. After all big and small materials are prepared, raw rubber starts to be automatically put into the internal mixer, an operator checks that the rubber completely enters the internal mixer after the raw rubber is put into the internal mixer, presses a door closing confirmation button of a charging door, the internal mixer starts to automatically carry out internal mixing, the rotating speed of a main machine rotor of the internal mixer and the pressure of an upper top bolt are the process setting rotating speed, the upper top bolt descends, the raw rubber starts to plasticate, the plasticate time is 60+/-10 s, and the upper top bolt ascends after the plasticate is completed; the hoister starts to dose the rechecked carbon black and small powder materials to the internal mixer in sequence, and the powder is evenly eaten by lifting the upper top bolt after the feeding is completed. The rotor of the internal mixer meets the requirement of automatic temperature control by changing the rotating speed and lifting the upper ram, simultaneously meets the requirement of automatic glue discharging when the glue discharging temperature is 135+/-5 ℃ and the glue discharging time is 200+/-20 seconds, the upper ram of the internal mixer is lifted, the charging door is opened, the rotating speed of the internal mixer is 40-45 r/min, the upper ram is lowered, the lifting ram begins to discharge to the open mill, after the discharging is completed, the upper ram is lifted, the discharging door is closed, the charging door is opened, the discharge port of the internal mixer is opened, and the glue stock is discharged between two rollers of the open mill.
S4, open milling, wherein the open milling temperature is controlled to be not higher than 60-80 ℃, the time is controlled to be 5-7min, the roll gap is regulated to be 4-6mm, sulfur is rapidly and uniformly added between two rolls for thin passing, after powder is completely scattered into sizing materials, turning is started, cutting left and right, turning is performed for 2-3min, thin passing is performed for two times, triangular packaging is performed, turning left and right for discharging sheets, after discharging sheets, semi-finished sizing materials are placed on a clean material frame for cooling, numbering is performed on semi-finished sizing materials, the appearance and thickness of the sheets after discharging sheets are standard, the sizing sheets are uniform, and falling of the sizing sheets is strictly forbidden in the whole rubber mixing process.
S5, vulcanizing injection, namely setting the injection molding machine for 10+/-2 minutes at the temperature of 150-155 ℃ and the pressure of 16-22MPa, wherein the injection quantity is 1140cc; and then cutting the semi-finished rubber material into rubber strips, enabling the length direction of the formed rubber sheet to be consistent with the rolling direction of the rubber material, waiting for injection vulcanization, preheating a die for 30-90min, opening the die, placing a stainless steel plate sprayed with dilutions of adhesives CH205GB and CH220LFGB, and after finishing, closing the die and performing injection vulcanization to form a finished product.
And S6, detecting finished products, namely inspecting physical properties of the products, issuing inspection reports and storing original records according to batches, frequencies, methods, requirements and the like specified by the technical standards of the railway industry standard TB/T3395 (1-5) 2015 and drawing requirements of the research 9204-5.
The beneficial effects of the invention are as follows: the manufacturing method of the elastic backing plate under the stone dragon bridge small-resistance fastener rail adopts an internal mixer and an open mill to prepare a semi-finished product, the semi-finished product is prepared and molded through an injection molding process, the prepared rubber backing plate is suitable for straight lines and curve sections with R being more than or equal to 800m, the running rail is 60kg/m, the guard rail is 50kg/m, the product completely meets the requirements of drawing such as railway industry standard TB/T3395 (1-5) 2015 and grinding 9204-5, and the stability and safety of the laying of the line can meet the actual requirements on site.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention, wherein:
FIG. 1 is a static stiffness test chart of an elastic backing plate under a rail of a stone dragon bridge low-resistance fastener;
FIG. 2 is a graph of tensile strength test of a Dan Longqiao low resistance fastener under rail resilient pad prior to aging;
FIG. 3 is a drawing showing a tensile strength test of an aged resilient pad under a rail of a stone dragon bridge low resistance fastener;
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
Embodiment one: the method comprises the following steps:
the railway stone dragon bridge small-resistance fastener rail lower elastic cushion plate is prepared from the following raw materials in parts by weight:
(1) Big material
38000g + -50 g of natural rubber
MT carbon black 9000g + -40 g
N330 carbon black 5000g + -40 g
N774 carbon black: 10000 g.+ -. 40g
4000g + -40 g white carbon black
(2) Small material
360g + -3 g of sulfur powder
350g + -3 g of accelerator D
Promoter CZ 520g + -3 g
170g + -15 g of accelerator DM
500g + -15 g of accelerator DTDM
700 g+/-3 g of anti-aging agent RD
300g + -3 g of anti-aging agent D
Anti-aging agent 4010NA of 700 g+ -3 g
1500g + -5 g zinc oxide
650 g+ -3 g stearic acid
Homogenizing agent D-4A 550g + -3 g
480g + -3 g of aluminum silicate
Silane coupling agent XG-669C 300g + -3 g
A manufacturing method of an elastic backing plate under a railway stone bridge small-resistance fastener rail comprises the following steps:
step S1, raw materials are prepared, wherein the raw materials are divided into raw rubber, large materials and small materials, raw material model specifications are placed in corresponding system-specified charging barrels and charging hoppers according to charging barrel and charging hopper capacities of a full-automatic batching system and weighing precision of corresponding automatic metering scales, raw material demand in each charging barrel is set according to system formula specified quantity, raw rubber dicing metering errors are +/-50 g when raw materials are proportioned, and sulfur is controlled to +/-5 g by adopting manual batching precision.
Step S2, automatic allocation of small materials is carried out, the small materials are proportioned by adopting a full-automatic batching system, a platform balance is provided with 12 independent raw material storage barrels, automatic quantitative weighing, platform balance supporting and one inch line conveying are carried out for proportioning through a PLC controller, each small material throwing precision is controlled to be +/-5 g, the total weighing precision is consistent with the sum of each small material precision and is controlled to be +/-50 g, after all metering materials are metered, the inch line starts a positive running lattice again, and automatic rechecking is carried out on each raw material storage barrel conveyed by the inch line. And finally, conveying the materials to a total amount checking scale through an inch line, carrying out small material compounding, controlling the checking scale accuracy within +/-50 g, waiting for a next instruction of a PLC (programmable logic controller) on a inch line conveying belt after checking, and automatically removing unqualified products after checking.
And S3, banburying, namely, using an internal mixer for banburying, wherein the setting of the banburying process is required to meet the automatic temperature control of the sizing material and the set sizing temperature during sizing discharging, and otherwise, judging that the sizing material of the vehicle is unqualified. The banburying reaches the process set temperature of 135+/-5 ℃, the PLC is adopted to automatically control the cooling circulation water quantity, the rotating speed of the internal mixer and the upper ram pressure to control the temperature, and firstly raw rubber is checked on a check scale and then signals are sent to the internal mixer. Secondly, feeding MT carbon black, N330 carbon black, N774 carbon black and white carbon black into an internal mixer through a PLC control scraper conveying cylinder, controlling each feeding precision of an upper auxiliary machine to be +/-200 g, and feeding signals to the internal mixer through the upper auxiliary machine when a batching hopper reaches a designated position. After all big and small materials are prepared, raw rubber starts to be automatically put into the internal mixer, an operator checks that the rubber completely enters the internal mixer after the raw rubber is put into the internal mixer, presses a door closing confirmation button of a charging door, the internal mixer starts to automatically carry out internal mixing, the rotating speed of a main machine rotor of the internal mixer and the pressure of an upper top bolt are the process setting rotating speed, the upper top bolt descends, the raw rubber starts to plasticate, the plasticate time is 60+/-10 s, and the upper top bolt ascends after the plasticate is completed; the hoister starts to dose the rechecked carbon black and small powder materials to the internal mixer in sequence, and the powder is evenly eaten by lifting the upper top bolt after the feeding is completed. The rotor of the internal mixer meets the requirement of automatic temperature control by changing the rotating speed and lifting the upper ram, simultaneously meets the requirement of automatic glue discharging when the glue discharging temperature is 135+/-5 ℃ and the glue discharging time is 200+/-20 seconds, the upper ram of the internal mixer is lifted, the charging door is opened, the rotating speed of the internal mixer is 40-45 r/min, the upper ram is lowered, the lifting ram begins to discharge to the open mill, after the discharging is completed, the upper ram is lifted, the discharging door is closed, the charging door is opened, the discharge port of the internal mixer is opened, and the glue stock is discharged between two rollers of the open mill.
S4, open milling, wherein the open milling temperature is controlled to be not higher than 60-80 ℃, the time is controlled to be 5-7min, the roll gap is regulated to be 4-6mm, sulfur is rapidly and uniformly added between two rolls for thin passing, after powder is completely scattered into sizing materials, turning is started, cutting left and right, turning is performed for 2-3min, thin passing is performed for two times, triangular packaging is performed, turning left and right for discharging sheets, after discharging sheets, semi-finished sizing materials are placed on a clean material frame for cooling, numbering is performed on semi-finished sizing materials, the appearance and thickness of the sheets after discharging sheets are standard, the sizing sheets are uniform, and falling of the sizing sheets is strictly forbidden in the whole rubber mixing process.
S5, vulcanizing injection, namely setting the injection molding machine for 10+/-2 minutes at the temperature of 150-155 ℃ and the pressure of 16-22MPa, wherein the injection quantity is 1140cc; and then cutting the semi-finished rubber material into rubber strips, enabling the length direction of the formed rubber sheet to be consistent with the rolling direction of the rubber material, waiting for injection vulcanization, preheating a die for 30-90min, opening the die, placing a stainless steel plate sprayed with dilutions of adhesives CH205GB and CH220LFGB, and after finishing, closing the die and performing injection vulcanization to form a finished product.
And S6, detecting finished products, namely inspecting physical properties of the products, issuing inspection reports and storing original records according to batches, frequencies, methods, requirements and the like specified by the technical standards of the railway industry standard TB/T3395 (1-5) 2015 and drawing requirements of the research 9204-5.
Example two
Method and result for testing performance of elastic backing plate under Dan Longqiao small-resistance fastener rail
Inspection apparatus:
shore A durometer
MEP-200 microcomputer control servo fatigue testing machine
WDL series multifunctional electronic tension tester
DL-D2500N electronic tensile testing machine
401A, 401-A, 802 thermal ageing test box and dryer
ZC36 type superhigh resistance meter
High insulation resistance tester
Test of tensile Strength
1. Tensile strength test method
The inventor randomly extracts Dan Longqiao small-resistance fastener rail lower elastic backing plate products in the embodiment 1, a dumbbell-shaped test sample is cut out by a rubber test I-shaped cutter to test the tensile strength, the sampling method is used for respectively carrying out tests according to GB/T2828.1 by randomly extracting 2 backing plates, and the test results all meet the requirements and are qualified. The test steps are as follows:
1) Symmetrically clamping a sample on an upper clamp holder and a lower clamp holder of a tensile testing machine, uniformly distributing tensile force on a cross section, clamping an upper clamp head, clearing a force value, clamping a lower clamp head, adjusting an upper fine tuning button and a lower fine tuning button, resetting the force value, and clearing displacement; the gauge length between the two gauge holders of large deformation was adjusted to 25mm. Then stably clamping on the sample;
2) The moving speed of the clamp holder is 500 mm/min plus or minus 50 mm/min;
3) If the sample breaks outside the narrow portion, the test results are discarded, and the sample is taken again for repeated tests.
2. The results of the mechanical properties (tensile strength) test are shown in tables 2 and 3, respectively.
Table 1a tensile strength test chart of the invention before aging of the elastic backing plate under the rail of the small resistance fastener of the stone dragon bridge;
table 2 a tensile strength test chart of the invention after aging of the elastic backing plate under the rail of the stone dragon bridge small resistance fastener;
(II) constant compression set test method
The inventor randomly extracts the Dan Longqiao small-resistance fastener rail lower elastic backing plate products in the embodiment 1, cuts a round sample with the diameter of 30mm from the rubber test to test the constant compression set test, and the sampling method is used for respectively carrying out tests according to GB/T2828.1 by randomly extracting 2 backing plates, wherein the test results all meet the requirements and are qualified. The test steps are as follows:
(1) Sample preparation
A special cutter is adopted, a groove is taken as a central line (a groove can be cut at will) on a rubber backing plate, a circular sample with the diameter of 30mm is cut, three-point thicknesses are respectively measured by a vernier caliper, and the average value is the thickness before compression.
(2) Test procedure
Measuring the thickness of the circular gasket before the test, uniformly distributing 3 positions, and taking the average value of the thickness as h 0 The shim was then placed into a compression jig and compressed to 50% of the original thickness. Placing the sample in an incubator at (100+ -2) deg.C for 24h, taking out, cooling at (23+ -3) deg.C for (30+ -1) min, removing the clamp, holding the sample at (23+ -3) deg.C for (24+ -0.5) h, and measuring thickness h of the spacer 1 (3 points marked before compression were measured and averaged), recorded as the post-test sample thickness h 1 。
(3) Test results
A calculation formula; c= (h 0 –h 1 )/h 0 ×100
Wherein: c- -constant compression set, unit: the%;
h 0 -sample thickness before compression, unit: mm;
h 1 -sample thickness after compression, unit: mm;
and the test result shows that the constant compression set is less than or equal to 20 percent and is qualified.
Table 4 constant compression set test results for the elastomeric pad under the rail of the small resistance fastener of the present invention for a stone bridge
(III) static stiffness test
The inventor randomly extracts the rubber test for the Dan Longqiao small-resistance fastener rail lower elastic backing plate product in the embodiment 1, uses an MEP-200 microcomputer control servo fatigue tester to test working resistance, and the sampling method randomly extracts 5 backing plates according to GB/T2828.1 to test respectively, and the test results all meet the requirements to be qualified. The test steps are as follows:
1) Preparation before test: the test environment temperature is (23+/-3) DEG C.
2) The placing sequence of the test device on the test machine is as follows: the test device comprises a supporting steel plate, abrasive cloth with the grain size P120 (with sand faces upwards), a tested sample, abrasive cloth with the grain size P120 (with sand faces downwards), a load distribution plate (used for testing an elastic cushion arranged under an iron cushion plate, the load distribution plate is placed according to a field use state, and is placed in an effective area of the elastic cushion), and a loading steel plate.
3) At least 3 independent displacement sensors are arranged on the supporting steel plate, and the vertical displacement of the loading steel plate is measured at equal intervals.
Note that: when the displacement of the loaded steel plate is measured by using the displacement sensor of the tester, the system error caused by the deformation of the tester during loading is eliminated.
4) Setting the displacement sensor to zero, loading the displacement sensor to the maximum load at the speed of 60kN/min plus or minus 10 kN/min, and recording the displacement D of the loading steel plate when the load is added to F1 and F2 respectively 1 、D 2 (all are averages of 3 displacement sensors. The elastic cushion static stiffness 1 was calculated according to the formula described in 6.
5) F 1 20kN, F 2 70kN, 80kN maximum load.
6) F measured by any one displacement sensor 2 And F 1 The lower displacement difference is compared with the value measured by 3 displacement sensors (D 2 -D 1 ) When the values differ by more than 20%, the test should be repeated such that a load is applied to the center of the elastic cushion. The test is repeated twice, the load is continued after the test stays for 1min after each unloading, and the third test value is taken as the static rigidity of the elastic cushion.
Table 5 static stiffness test results of the elastomeric pad under the rail of the small resistance fastener of the stone dragon bridge of the present invention
| Numbering device | Designated load 1 (kN) | Maximum force specified load 2 (kN) | Deformation (mm) | Deformation (mm) | Static stiffness (kN/mm) |
| 1 | 20 | 70 | 0.821 | 1.641 | 60.98 |
| 2 | 20 | 70 | 0.682 | 1.486 | 62.19 |
| 3 | 20 | 70 | 0.681 | 1.505 | 60.68 |
| 4 | 20 | 70 | 0.664 | 1.489 | 60.61 |
| 5 | 20 | 70 | 0.647 | 1.458 | 61.65 |
(IV) adhesive peel Strength test
1. Adhesive peel strength test method:
the elastic backing plate products under the small-resistance fastener rails of the stone dragon bridge obtained in the embodiment 1 are randomly extracted respectively to be used as samples for inspection, the sampling method is used for respectively carrying out experiments according to GB/T2828.1, 5 backing plates are randomly extracted respectively, and the test results all meet the requirements and are qualified. The test steps are as follows:
the sample is symmetrically loaded into the fixture. The peel face of the sample was oriented toward the tester. Prior to loading, the rubber was peeled from the sheet with a sharp blade 1.5. 1.5 mm. The free end of the rubber is loaded into the clamp. The tensile tester was then started at a speed of 50 mm/min and 5 mm/min until the sample was completely separated, and the maximum peel force was recorded.
An automatic drawing device can also be used for the test to record the peeling process of the sample.
During the test, a knife was used to separate the rubber from the sheet as the rubber was to be torn.
Table 6 original record of adhesive peel strength test of elastic pad under rail of stone-dragon bridge small-resistance fastener;
TABLE 7 physical and mechanical properties test results of elastic pad under the track of the small resistance fastener of the Shilong bridge of the invention
According to the test results of fig. 1, 2, 3 and tables 1-7, the tensile strength, hardness, resistance, static stiffness, dynamic-static stiffness ratio, adhesive peel strength, fatigue performance and various physical and mechanical properties of the elastic backing plate under the rail of the stone dragon bridge small-resistance fastener all accord with the national standard.
The foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. The railway stone dragon bridge small-resistance fastener rail lower elastic cushion plate is characterized by being prepared from the following raw materials in parts by weight:
(1) Big material
38000g + -50 g of natural rubber
MT carbon black 9000g + -40 g
N330 carbon black 5000g + -40 g
N774 carbon black: 10000 g.+ -. 40g
4000g + -40 g white carbon black
(2) Small material
360g + -3 g of sulfur powder
350g + -3 g of accelerator D
Promoter CZ 520g + -3 g
170g + -15 g of accelerator DM
500g + -15 g of accelerator DTDM
700 g+/-3 g of anti-aging agent RD
300g + -3 g of anti-aging agent D
Anti-aging agent 4010NA of 700 g+ -3 g
1500g + -5 g zinc oxide
650 g+ -3 g stearic acid
Homogenizing agent D-4A 550g + -3 g
480g + -3 g of aluminum silicate
300 g+/-3 g of silane coupling agent XG-669C.
2. The manufacturing method of the railway stone bridge small-resistance fastener rail lower elastic backing plate is characterized by comprising the following steps of:
step S1, raw materials are prepared, wherein the raw materials are divided into raw rubber, large materials and small materials, raw material model specifications are placed in corresponding system-specified charging barrels and charging hoppers according to the charging barrels and charging hoppers capacity of a full-automatic batching system and weighing precision of corresponding automatic metering scales, raw material demand in each charging barrel is set according to the system formula specified quantity, raw rubber dicing metering errors are +/-50 g when raw materials are proportioned, and sulfur is controlled to +/-5 g by adopting manual batching precision;
step S2, automatically preparing small materials, wherein the small materials are prepared by a full-automatic batching system, the automatic weighing scale is correspondingly provided with 12 independent raw material storage barrels, the automatic weighing scale and one inch line are conveyed by a PLC (programmable logic controller) to prepare materials, the throwing precision of each small material is controlled to be +/-5 g, the weighing precision of the total amount is consistent with the sum of the precision of each small material and is controlled to be +/-50 g, after the measurement of all the measured materials is completed, the inch line is started to run forward again for one lattice, and each raw material storage barrel conveyed by the inch line is automatically rechecked;
finally, conveying the materials to a total amount checking scale through an inch line, performing small material compounding, controlling the checking scale accuracy within +/-50 g, waiting for a next instruction of a PLC (programmable logic controller) on a inch line conveying belt after checking, and automatically removing unqualified products after checking;
s3, banburying, namely, a banburying machine is used for banburying, when the banburying process is set, the automatic temperature control of the sizing material is required to be met, and the set sizing temperature during sizing discharging is required to be met, otherwise, the sizing material of the vehicle is judged to be unqualified;
the banburying reaches the process set temperature of 135+/-5 ℃, the PLC is adopted to automatically control the cooling circulation water quantity, the rotating speed of the internal mixer and the upper ram pressure to control the temperature, and firstly raw rubber is checked on a check scale and then signals are sent to the internal mixer;
secondly, feeding MT carbon black, N330 carbon black, N774 carbon black and white carbon black into an internal mixer through a PLC control scraper conveying cylinder, controlling each feeding precision of an upper auxiliary machine to be +/-200 g, and feeding signals to the internal mixer by the upper auxiliary machine when a batching hopper reaches a designated position;
after all big and small materials are prepared, raw rubber starts to be automatically put into the internal mixer, an operator checks that the rubber completely enters the internal mixer after the raw rubber is put into the internal mixer, presses a door closing confirmation button of a charging door, the internal mixer starts to automatically carry out internal mixing, the rotating speed of a main machine rotor of the internal mixer and the pressure of an upper top bolt are the process setting rotating speed, the upper top bolt descends, the raw rubber starts to plasticate, the plasticate time is 60+/-10 s, and the upper top bolt ascends after the plasticate is completed; the hoister starts to dose the carbon black and small powder materials after rechecking to the internal mixer in sequence, and the powder is evenly eaten by lifting the upper top bolt after the feeding is completed;
the rotor of the internal mixer meets the requirement of automatic temperature control by changing the rotating speed and lifting the upper ram, and simultaneously meets the requirement of automatic glue discharge when the glue discharge temperature is 135+/-5 ℃ and the glue discharge time is 200+/-20 seconds, the upper ram of the internal mixer is lifted, a charging door is opened, the rotating speed of the internal mixer is 40-45 r/min, the upper ram is lowered, the lifting ram begins to discharge to the open mill, after the discharge is completed, the upper ram is lifted, a discharging door is closed, the charging door is opened, a discharge port of the internal mixer is opened, and glue stock is discharged between two rollers of the open mill;
s4, open milling, wherein the open milling temperature is controlled to be not more than 60-80 ℃, the time is controlled to be 5-7min, the roll gap is regulated to be 4-6mm, sulfur is rapidly and uniformly added between two rolls for thin passing, after powder is completely scattered into sizing materials, turning is started, cutting left and right, turning is performed for 2-3min, thin passing is performed for two times, triangular packaging is performed, turning left and right for discharging sheets, after discharging sheets, semi-finished sizing materials are placed on a clean material frame for cooling, numbering is performed on semi-finished sizing materials, the appearance and thickness of the sheets after discharging sheets are standard, the sizing sheets are uniform, and falling of the sizing sheets is strictly forbidden in the whole rubber mixing process;
s5, vulcanizing injection, namely setting the injection molding machine for 10+/-2 minutes at the temperature of 150-155 ℃ and the pressure of 16-22MPa, wherein the injection quantity is 1140cc; cutting the semi-finished rubber material into rubber strips, enabling the length direction of the formed rubber sheet to be consistent with the rolling direction of the rubber material, waiting for injection vulcanization, preheating a die for 30-90min, opening the die, placing a stainless steel plate sprayed with dilutions of adhesives CH205GB and CH220LFGB, and after finishing, closing the die, and performing injection vulcanization to form a finished product;
and S6, detecting finished products, namely inspecting physical properties of the products, issuing inspection reports and storing original records according to batch, frequency, method, requirement and the like specified by the technical standard of a railway industry standard TB/T3395 (1-5) 2015 and drawing requirements of a research 9204-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310298869.8A CN116515177A (en) | 2023-03-24 | 2023-03-24 | Railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310298869.8A CN116515177A (en) | 2023-03-24 | 2023-03-24 | Railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and manufacturing method thereof |
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| CN116515177A true CN116515177A (en) | 2023-08-01 |
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ID=87407277
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|---|---|---|---|
| CN202310298869.8A Pending CN116515177A (en) | 2023-03-24 | 2023-03-24 | Railway stone dragon bridge small-resistance fastener rail lower elastic backing plate and manufacturing method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN116515177A (en) |
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2023
- 2023-03-24 CN CN202310298869.8A patent/CN116515177A/en active Pending
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