CN110438849A - A kind of high rigidity low-density buffer shock-absorbing device and preparation method thereof - Google Patents
A kind of high rigidity low-density buffer shock-absorbing device and preparation method thereof Download PDFInfo
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- CN110438849A CN110438849A CN201910789099.0A CN201910789099A CN110438849A CN 110438849 A CN110438849 A CN 110438849A CN 201910789099 A CN201910789099 A CN 201910789099A CN 110438849 A CN110438849 A CN 110438849A
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- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a kind of high rigidity low-density buffer shock-absorbing devices and preparation method thereof, are made of three kinds of elastic protective layer, toughening layer and vibration reduction and cushioning layer structural material；The elastic protective layer is in backing plate lowest level, is non-foamed polyure-thane elastomeric material, elastic protective layer's material property are as follows: 90 ± 5A of hardness, intensity >=35Mpa, elongation >=300%；The toughening layer is set between elastic protective layer and vibration reduction and cushioning layer, such as high-strength fiber glass felt, glass-fiber-fabric, nylon cloth, non-woven fabrics, geotextiles, curtain cloth material；Buffer shock-absorbing layer is in backing plate top layer, is expansion type polyurethane elastomer material: 0.3~0.8g/cm of density3, hardness Shao D40 ± 10.The buffer shock-absorbing device is composite material, and intensity is high, the service life is long, anti-puncture effect is good, reduces the rigid collision of sleeper and stone, and then reduce tiny fragments of stone, coal, etc. mountain flour.And by using the High Hardness Polyurethane Elastomer material of foaming, under the premise of retainer member rigidity, reduces the quality of shock absorber part and density, reduce costs.
Description
Technical field
The invention belongs to buffer shock-absorbing field of engineering technology, relate generally to a kind of vibration attenuation pad device of polyurethane material class
Part.
Background technique
With the continuous development of industrial technology, field of track traffic is in the rapid development stage, and backing plate is track structure
In one of important component, backing plate reduce orbit rigidity, improve route elasticity, improve wheel track in terms of play not
Alternative effect.
For existing Ballast track, although having the low advantage of construction cost, need to pass through Bed plate for sleeper simultaneously
Often replacement and railway roadbed make cleaning etc. firm by ramming, cause maintenance heavy workload, it is at high cost the disadvantages of, especially in the track switch of railway
Area, backing plate damping layer and the frictional force of tiny fragments of stone, coal, etc. stone are bigger, and Rail inspection destroys and tiny fragments of stone, coal, etc. mountain flourization is also even more serious.Sleeper and road
It is the main reason for causing tiny fragments of stone, coal, etc. mountain flour that the rigidity of bed tiny fragments of stone, coal, etc. stone, which is touched,.By installing elastic damping layer additional under sleeper, can effectively reduce
The rigid collision of sleeper and stone, and then reduce tiny fragments of stone, coal, etc. mountain flour.Used at present is rubber mat plate, but the tolerance of rubber material
Property and intensity it is relatively poor, it is easy to pierced through by tiny fragments of stone, coal, etc. stone, at the same the factors such as heat, oxygen, ultraviolet light and rainwater effect under, rubber pad
The service life of plate can also greatly shorten.Therefore it is badly in need of novel high-performance cushion plate, improves existing Bed plate for sleeper and subtract vibration isolating effect.
Dusting when reducing train passage to railway roadbed tiny fragments of stone, coal, etc. stone, prolongs the service life, substitutes current rubber mat plate, be asking for urgent need to resolve
Topic.
Summary of the invention
The invention solves first technical problem be to provide a kind of high rigidity low-density buffer shock-absorbing device.This is slow
Rushing shock absorber part is composite material, and intensity is high, the service life is long, anti-puncture effect is good, reduces the rigid collision of sleeper and stone, in turn
Reduce tiny fragments of stone, coal, etc. mountain flour.And by using the High Hardness Polyurethane Elastomer material of foaming, under the premise of retainer member rigidity,
It reduces the quality of shock absorber part and density, reduces costs.
The invention solves second technical problem be to provide the system of high rigidity low-density buffer shock-absorbing device a kind of
Preparation Method.
To solve first technical problem, the technical solution adopted by the present invention is that: a kind of high rigidity low-density buffer shock-absorbing
Device is made of three kinds of elastic protective layer, toughening layer and vibration reduction and cushioning layer structural material；The elastic protective layer is in backing plate most
Lower layer is non-foamed polyure-thane elastomeric material, elastic protective layer's material property are as follows: 90 ± 5A of hardness, intensity >=35Mpa, stretch
Long rate >=300%；The toughening layer is set between elastic protective layer and vibration reduction and cushioning layer, such as high-strength fiber glass felt, glass-fiber-fabric, Buddhist nun
Long Bu, non-woven fabrics, geotextiles, curtain cloth material etc., it is preferred that toughening layer material used in Bed plate for sleeper by surface it is modified at
Reason；Buffer shock-absorbing layer is in backing plate top layer, is expansion type polyurethane elastomer material, material property are as follows: and density 0.3~
0.8g/cm3, hardness Shao D40 ± 10.
Buffer shock-absorbing device thickness is adjusted according to the requirement of product, is used as track pad, general elastic protective layer
Thickness≤3mm, toughening layer≤3mm.
To solve second technical problem, the present invention provides a kind of preparation side of high rigidity low-density buffer shock-absorbing device
Method, comprising the following steps: (1) press the temperature and mixing ratio of cast polyurethane material requirement, pour into predetermined temperature after mixing de-bubble
Mold in, toughening layer is put into material process of setting, and carry out pressing mold processing, makes not solidify material and toughening layer material tool
There is good caking property；(2) when can demould, after demoulding in addition the elastic protective layer of composite construction and toughening layer are put into togerther
In one enclosed type foaming mould, according to volume and required density, by metering mixing cast polyurethane micro-pore elastomer material, and
Molding makes its foaming immediately, full of die cavity and solidifies；(3) it solidifies when material to when can demould, demoulding is put into baking oven and carries out after-ripening
Change；(4) post curing is completed, and carries out moditied processing to get high rigidity low-density buffer shock-absorbing device finished product.
Compared with rubber material, the beneficial effects of the present invention are: high rigidity low-density buffer shock-absorbing device of the present invention,
It is made of three kinds of elastic protective layer, toughening layer and vibration reduction and cushioning layer structural material, the elastic protective layer is high rigidity, high-strength
The non-foamed polyure-thane elastomeric material of degree, high resiliency and high abrasion, it is possible to provide preferably anti-puncture and wear-resisting property etc. extend
The service life of backing plate；The toughening layer can be well embedded between elastic protective layer and vibration reduction and cushioning layer, can further improve backing plate
Toughness and anti-penetration performance；Buffer shock-absorbing layer is in the top layer of backing plate, is expansion type polyurethane elastomer material, protects with elasticity
Jacket material is compared, and the expansion type polyurethane elastomer material of vibration reduction and cushioning layer has the characteristics that high rigidity, low-density, is not being dropped
Under the premise of low device rigidity, material amounts and cost can be not only reduced, the integrated buffer damping property of device also can be improved, have
Conducive to using effect.High resiliency low-density buffer shock-absorbing device of the present invention is used for rail traffic, can reduce sleeper and stone
Rigid collision, and then reduce tiny fragments of stone, coal, etc. mountain flour.
Preparation method of the present invention, elastic protective layer, vibration reduction and cushioning layer have carried out pressing mold processing before uncured, with
Cementation occurs for toughening layer, combines together with it, and bonding is secured.
Specific embodiment
The present invention is described in further details below with reference to embodiment.
Embodiment 1
(1) the cast polyurethane material of the T2093 trade mark produced using Liming Research Institute of Chemical Industry Co., Ltd.,
It keeps 80 DEG C of cast polyurethane material A component (performed polymer), 120 DEG C of B component (chain extender), in A/B ratio 100/14.7, mixing
It uniformly and after deaeration pours into 100 DEG C of molds, according to material density, controls casting material quality, make it with a thickness of 2mm, in object
Expect to be put into the geotextiles for cutting size in process of setting, and carry out pressing mold processing, make not solidify complete between material and geotextiles
Full bonding；
(2) commercially available polyurethane material adhesive Kaimoluoke 218 is coated in geotextiles when can demould, after demoulding,
And elastic protective layer composite construction and toughening layer are put into togerther in another closed foaming mould, then use dawn
The microporous polyurethane elastomer casting material of the S1040D trade mark of Co., Ltd, chemical research designing institute production is according to isocyanide
The ratio mixing of acid esters component/polyol component (including polyalcohol, chain extender, catalyst, foaming agent etc.)=100/150 is poured
Note, quickly molding makes it full of die cavity and solidifies, the high rigidity polyurathamc material thickness 6mm of casting；
(3) it solidifies when material to when can demould, demoulding is put into 100 DEG C of baking ovens and carries out post curing 16 hours；
(4) after the completion of post curing, moditied processing is carried out to get composite buffering vibration attenuation pad device finished product, overall thickness 11mm.
Wherein in buffer shock-absorbing device, the polyurethane material performance of elastic protective layer are as follows: hardness Shao A93, tensile strength
43MPa, elongation 380%, rebound 40%；The blown polyurethane materials performance of buffer shock-absorbing layer are as follows: density 0.45g/cm3, firmly
Spend Shao D40.After the backing plate exemplar carries out 3,000,000 fatigues with reference to TJ/GW 103-2013 standard, does not occur to be pierced through by tiny fragments of stone, coal, etc. stone, pad
Plate tears phenomenon.
Embodiment 2
(1) the cast polyurethane material of the M4087 trade mark produced using Liming Research Institute of Chemical Industry Co., Ltd.,
It keeps 50 DEG C of cast polyurethane material A component (performed polymer), 40 DEG C of B component (polyalcohol), 45 DEG C of component C (chain extender), by A/
B/C ratio 100/80/13.3 is uniformly mixed and pours into 80~100 DEG C of molds after deaeration, according to material density, control casting
Quality of material makes it with a thickness of 2.5mm, in material process of setting, is put into the nylon cloth for cutting size, and carry out at pressing mold
Reason, makes not solidify and bonds completely between material and geotextiles；
(2) when can demould, pressuring template is taken out, the elastic protective layer of composite construction and toughening layer are put into togerther other one
In a closed foaming mould, then using the poly- of the S1035D trade mark of Liming Research Institute of Chemical Industry Co., Ltd.'s production
Urethane micro-pore elastomer casting material, according to isocyanate component/polyol component (including polyalcohol, chain extender, catalyst,
Foaming agent etc.)=100/120 ratio mixes casting, and quickly molding makes it full of die cavity and solidifies, the high rigidity foaming of casting
Polyurethane materials thickness 7mm；
(3) it solidifies when material to when can demould, demoulding is put into 100 DEG C of baking ovens and carries out post curing 20 hours；
(4) after the completion of post curing, moditied processing is carried out to get composite buffering vibration attenuation pad device finished product, overall thickness 11mm.
Wherein the polyurethane material performance of being hit by a bullet property of buffer shock-absorbing device protective layer is hardness Shao A87, tensile strength
40MPa, elongation 520%, rebound 45%；The polyurethane material performance of buffer shock-absorbing layer are as follows: density 0.38g/cm3, hardness Shao
D35.After the backing plate exemplar carries out 3,000,000 fatigues with reference to TJ/GW 103-2013 standard, do not occur to be torn by the puncture of tiny fragments of stone, coal, etc. stone, backing plate
Split phenomenon.
Comparative example
Rubber mat plate with embodiment same thickness after reference TJ/GW 103-2013 standard carries out 3,000,000 fatigues,
Occur significantly to tear phenomenon by the puncture of tiny fragments of stone, coal, etc. stone, material.
Claims (8)
1. a kind of high rigidity low-density buffer shock-absorbing device, by three kinds of elastic protective layer, toughening layer and vibration reduction and cushioning layer structural wood
Material composition；The elastic protective layer is in backing plate lowest level, is non-foamed polyure-thane elastomeric material, elastic protective layer's material
It can are as follows: 90 ± 5A of hardness, intensity >=35Mpa, elongation >=300%；The toughening layer is set to elastic protective layer and vibration damping is slow
It rushes between layer；Buffer shock-absorbing layer is in backing plate top layer, is expansion type polyurethane elastomer material, material property are as follows: density 0.3
~0.8g/cm3, hardness Shao D40 ± 10.
2. high rigidity low-density buffer shock-absorbing device according to claim 1, it is characterized in that the toughening layer is high-strength glass
Fine felt, glass-fiber-fabric, nylon cloth, non-woven fabrics, geotextiles or curtain cloth material.
3. high rigidity low-density buffer shock-absorbing device according to claim 1, it is characterized in that toughening layer material is by surface
Modification.
4. high rigidity low-density buffer shock-absorbing device according to claim 1, it is characterized in that elastic protective layer's thickness≤
3mm, toughening layer≤3mm.
5. a kind of method for preparing high rigidity low-density buffer shock-absorbing device described in one of Claims 1 to 4, including following step
It is rapid: (1) to press the temperature and mixing ratio of cast polyurethane material requirement, poured into the mold of predetermined temperature after mixing de-bubble, in object
It is put into toughening layer in material process of setting, and carries out pressing mold processing, makes not solidify material and toughening layer material with good bonding
Property；(2) when can demould, the elastic protective layer of composite construction and toughening layer are put into togerther another enclosed type hair after demoulding
It steeps in mold, according to volume and required density, by metering mixing cast polyurethane micro-pore elastomer material, and molding makes it immediately
Foaming, full of die cavity and solidifies；(3) it solidifies when material to when can demould, demoulding is put into baking oven and carries out post curing；(4) post curing
It completes, carries out moditied processing to get high rigidity low-density buffer shock-absorbing device finished product.
6. according to the method described in claim 5, the cast polyurethane material refers to the limited duty of dawn chemical research designing institute
The trade mark of Ren company production is the product of T2093, M4087.
7. according to the method described in claim 5, the microporous polyurethane elastomer material refers to dawn chemical research designing institute
The trade mark of Co., Ltd's production is the product of S1040D, S1035D.
8. according to the method described in claim 5, it is characterized in that spraying the commercially available triumphant nurse of polyurethane material adhesive on toughening layer
Lip river gram 218.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910789099.0A CN110438849B (en) | 2019-08-12 | 2019-08-12 | High-rigidity low-density buffering vibration damper and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910789099.0A CN110438849B (en) | 2019-08-12 | 2019-08-12 | High-rigidity low-density buffering vibration damper and preparation method thereof |
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| CN110438849B CN110438849B (en) | 2021-09-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2892940Y (en) * | 2005-11-28 | 2007-04-25 | 朱德功 | Elastic pads under rail sleepers |
| CN103130981A (en) * | 2013-03-20 | 2013-06-05 | 黎明化工研究设计院有限责任公司 | High-hardness thermoplastic polyurethane elastomer and preparation method thereof |
| CN105401492A (en) * | 2015-12-22 | 2016-03-16 | 成都市新筑路桥机械股份有限公司 | Waterproof vibration-damping composite structure applied to embedded track system and construction method of waterproof vibration-damping composite structure |
| CN106008911A (en) * | 2016-05-20 | 2016-10-12 | 中国铁道科学研究院金属及化学研究所 | Base plate material for rail fastener, preparation method and application of base plate material |
| JP2018159265A (en) * | 2018-06-07 | 2018-10-11 | 株式会社イノアックコーポレーション | Pad for sleeper |
| CN108660867A (en) * | 2018-07-26 | 2018-10-16 | 铁科腾跃科技有限公司 | A kind of compound type polyurethane sleeper pad and preparation method thereof |
| CN108755288A (en) * | 2018-08-17 | 2018-11-06 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of railway concrete sleeper bottom resilient sleeper-bearing |
-
2019
- 2019-08-12 CN CN201910789099.0A patent/CN110438849B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2892940Y (en) * | 2005-11-28 | 2007-04-25 | 朱德功 | Elastic pads under rail sleepers |
| CN103130981A (en) * | 2013-03-20 | 2013-06-05 | 黎明化工研究设计院有限责任公司 | High-hardness thermoplastic polyurethane elastomer and preparation method thereof |
| CN105401492A (en) * | 2015-12-22 | 2016-03-16 | 成都市新筑路桥机械股份有限公司 | Waterproof vibration-damping composite structure applied to embedded track system and construction method of waterproof vibration-damping composite structure |
| CN106008911A (en) * | 2016-05-20 | 2016-10-12 | 中国铁道科学研究院金属及化学研究所 | Base plate material for rail fastener, preparation method and application of base plate material |
| JP2018159265A (en) * | 2018-06-07 | 2018-10-11 | 株式会社イノアックコーポレーション | Pad for sleeper |
| CN108660867A (en) * | 2018-07-26 | 2018-10-16 | 铁科腾跃科技有限公司 | A kind of compound type polyurethane sleeper pad and preparation method thereof |
| CN108755288A (en) * | 2018-08-17 | 2018-11-06 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of railway concrete sleeper bottom resilient sleeper-bearing |
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