CN102092400B - Shaft spring for railway vehicle and its manufacture method - Google Patents
Shaft spring for railway vehicle and its manufacture method Download PDFInfo
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- CN102092400B CN102092400B CN201010143174.5A CN201010143174A CN102092400B CN 102092400 B CN102092400 B CN 102092400B CN 201010143174 A CN201010143174 A CN 201010143174A CN 102092400 B CN102092400 B CN 102092400B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 229920001971 elastomer Polymers 0.000 claims abstract description 128
- 239000005060 rubber Substances 0.000 claims abstract description 128
- 238000002347 injection Methods 0.000 claims abstract description 54
- 239000007924 injection Substances 0.000 claims abstract description 54
- 238000007493 shaping process Methods 0.000 claims abstract description 48
- 238000003475 lamination Methods 0.000 claims abstract description 25
- 238000004073 vulcanization Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 10
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims 2
- 238000005987 sulfurization reaction Methods 0.000 abstract description 31
- 230000006641 stabilisation Effects 0.000 abstract description 7
- 238000011105 stabilization Methods 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920003052 natural elastomer Polymers 0.000 description 3
- 229920001194 natural rubber Polymers 0.000 description 3
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- JYCBKPOKWDDOOV-UHFFFAOYSA-N 1-(4-butoxyphenyl)-3-[4-(dimethylamino)phenyl]thiourea Chemical compound C1=CC(OCCCC)=CC=C1NC(=S)NC1=CC=C(N(C)C)C=C1 JYCBKPOKWDDOOV-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 238000010068 moulding (rubber) Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 230000019635 sulfation Effects 0.000 description 1
- 238000005670 sulfation reaction Methods 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229950000898 thiambutosine Drugs 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
The invention provides a kind of shaft spring for railway vehicle and its manufacture method of improvement, what the improper situation can doing one's utmost to avoid the half finished rubber when contour forming to start sulfuration in injection kettle occurred may, after being filled to shaping die, starting sulfuration, decreasing reject rate and sought the stabilization of the quality as product.The elastic portion (3) that this shaft spring for railway vehicle clamps lamination rubber structure between main shaft (1) and the urceolus (2) with the axle center (P) mutually identical or substantially identical with it forms, this elastic portion (3) under or large body concentric state concentric with axle center (P) in the radial inward-outward direction alternately multiple rubber layer of lamination (4) and more than one hard next door (5), wherein, the rubber that described rubber layer (4) uses is set to the rubber having coordinated the vulcanization accelerator with the critical temperature higher than the temperature of injection kettle during its contour forming.
Description
Technical field
The present invention relates to a kind of shaft spring for railway vehicle, the elastic portion that this shaft spring for railway vehicle clamps lamination rubber structure between main shaft and the urceolus having a mutually identical or substantially identical axle center with main shaft forms, the elastic portion of this lamination rubber structure under concentric with axle center or large body concentric state in the radial inward-outward direction alternately multiple rubber layer of lamination and hard next door.
Background technology
As the conventional example of this shaft spring for railway vehicle, knownly adopt the type of the lamination rubber structure of straight cylinder as Patent Document 1 like that or as shown in patent documentation 2, adopt cross sectional shape to be the type (being called as the axle spring of what is called " cone brake ") of lamination rubber structure that tilts of splayed ground.Then, the typical example of shaft spring for railway vehicle and shaping die thereof are described.
First, as shown in Figure 1 and Figure 2, shaft spring for railway vehicle A is configured to be had: main shaft 1, there is the urceolus 2 with the main shaft 1 vertical axis P of identical (or substantially identical) mutually, be formed as under the state of vertical axis P (or substantially with one heart) with one heart radial inward-outward direction alternately lamination three layers of rubber layer 4 and two-layer hard next door 5 lamination rubber structure, be installed in elastic portion 3 between main shaft 1 and urceolus 2.
Main shaft 1 is metal, has: the axle top 1A of circular cone tubular that bottom expands, and top cylindrically, bottom is the axle bottom 1B in solid circles cross section with holes, is formed as the flange part 1C of major diameter shape between they upper and lower.Be configured in the hard next door, inner side 5 around this main shaft 1, hard next door, outside 5 and urceolus 2 and be similarly metal with main shaft 1, these 5,5,2 are formed as the less circular cone tubular of more past top diameter.In addition, Reference numeral 7 is weight saving portion.
Hard next door 5, inner side is positioned at slightly high position, hard next door, outside 5 than axle top 1A and is positioned at slightly high position than hard next door, inner side 5 and urceolus 2 configures with the state offset in position, vertical axis P direction than hard next door, outside 5 with being positioned at slightly high position.At the peripheral part of urceolus 2, form the fitting portion 6 for embedding chassis frame (omitting diagram).Axle top 1A, inside and outside hard next door 5,5, urceolus 2 and the inner rubber layer 4, intermediate rubber layer 4 and the outer rubber layer 4 that clamp between which integrated by bonding by Vulcanization described later.
In addition, as shown in Figure 3, Figure 4, shaft spring for railway vehicle A shaping die K is configured to have: be seen as circular cover mold 9 as a whole in the main metal paattern 8 and plane that have bottom tube-like.Main metal paattern 8 is configured to be had: discoideus bottom metal component 12, cylindric periphery hard ware 13, cylindric interior metal component 14, the intermetallic metal component 15 being arranged on the cylindrical shape between periphery hard ware 13 and interior metal component 14, nested mould 16, plug mould 17 and electric heating apparatus (or sleeve pipe) 18 etc.Interior metal component 14 is the parts for positioning spindle 1, and intermetallic metal component 15 or nested mould 16 are parts of the shape for locating hard next door 5 or setting rubber layer 4.In cover mold 9 and injection backing 10, form the filler opening 19,20 for making half finished rubber flow into each rubber layer 4 spatial portion s.
On cover mold 9, place the injection kettle T of supply half finished rubber g.Injection kettle T is configured to be had: be communicated with plug mould 17 and the chimeric injection backing 10 be placed on cover mold 9, can slide up and down to be entrenched in movably and inject in backing 10 and the injection mould 11 be communicated with plug mould 17.Be formed as by inject backing 10 fill the half finished rubber of necessary amount after embedded and pressure inject mould 11, discharge the structure of half finished rubber g from multiple filler opening 20 downwards.
Like this, Fig. 3 be represent at the half finished rubber g injecting kettle T and load specified amount, be embedded in that the injection mould 11 injecting backing 10 has just started to decline mobile (press-in is mobile), half finished rubber g is injected into rubber layer spatial portion s closes on state.Fig. 4 represents the state be full of by half finished rubber g by rubber layer spatial portion s by the decline movement of injecting mould 11.In prior art, shaping die K, from needless to say, injects kettle T and also will maintain curing temperature (carrying out the temperature needed for sulfuration), make the half finished rubber g be injected in main metal paattern 8 carry out sulfuration rapidly under the injection completion status shown in Fig. 4.Thus, be set to and make the time needed for rubber molding operation do one's utmost to shorten, shaft spring for railway vehicle A can be produced expeditiously.
That is, in order to the stabilization of rubber quality, half finished rubber g is injected at one stroke by multiple filler opening 19,20, even if but like this, inject the time that also will spend a few minutes.Thus, in injection kettle, just start the situation of sulfuration with regard to there is a part of half finished rubber g or cause injection pressure not too to rise because rubber flowing power is high and make the situation of the part generation rubber defect at main metal paattern.Therefore, the reject rate estimated to a certain degree of having to, also have the one side bad to the stabilization of quality or performance, shaft spring for railway vehicle and manufacture method thereof still leave some room for improvement simultaneously.
Patent documentation 1: Japanese Unexamined Patent Publication 2000-280903 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2003-341511 publication
Summary of the invention
The object of the invention is the shaft spring for railway vehicle and the manufacture method thereof that provide improvement, do one's utmost to avoid the half finished rubber when contour forming may start the improper situation of sulfuration in injection kettle, after being filled to shaping die, starting sulfuration, decreasing reject rate and sought the stabilization of the quality as product.
The shaft spring for railway vehicle of the invention of first aspect, the elastic portion 3 clamping lamination rubber structure between main shaft 1 and the urceolus 2 with the axle center P mutually identical or substantially identical with it forms, this elastic portion 3 under or large body concentric state concentric with described axle center P in the radial inward-outward direction alternately multiple rubber layer of lamination 4 and more than one hard next door 5, it is characterized in that
The rubber g that described rubber layer 4 uses is set to the rubber being combined with the vulcanization accelerator with the critical temperature r higher than the temperature t of injection kettle T during its contour forming.
The invention of second aspect, in the shaft spring for railway vehicle described in first aspect, is characterized in that, described critical temperature r is set as below the temperature k for carrying out the shaping die K of vulcanization forming to described elastic portion 3.
The invention of the third aspect, is characterized in that in the shaft spring for railway vehicle described in first or second aspect, and described vulcanization accelerator is the vulcanization accelerator of sulfenamide system.
The invention of fourth aspect, in shaft spring for railway vehicle according to any one of the first to the third aspect, it is characterized in that, the each leisure of inner peripheral surface 2a of the outer peripheral face 1a of described main shaft 1, described elastic portion 3 and described urceolus 2 is formed as mutually in the identical splayed towards gathering together enough along the cross sectional shape on the direction of described axle center P, and
The circular cone lamination rubber structure with mortar shape recess 21 be configured to, this mortar shape recess 21 by make described elastic portion 3 along described axle center P the relatively described main shaft 1 in direction near its path side configuration and make described urceolus 2 along described axle center P the relatively described elastic portion 3 in direction near its path side configuration form.
The manufacture method of the shaft spring for railway vehicle of the invention of the 5th aspect, the elastic portion 3 that this shaft spring for railway vehicle clamps lamination rubber structure between main shaft 1 and the urceolus 2 with the axle center P mutually identical or substantially identical with it forms, this elastic portion 3 under or large body concentric state concentric with described axle center P in the radial inward-outward direction alternately multiple rubber layer of lamination 4 and more than one hard next door 5, in the manufacture method of this shaft spring for railway vehicle, it is characterized in that
Shaping die K is used for forming with the half finished rubber g having loaded described main shaft 1, the state of described more than one hard next door 5 and described urceolus 2 flows into, the temperature k of this shaping die K is set as more than the critical temperature r of the vulcanization accelerator be coupled in half finished rubber g, and the temperature t of the injection kettle T supplying half finished rubber g to described shaping die K is set as described below critical temperature r, in this condition, half finished rubber g is injected from described injection kettle T to described shaping die K.
The invention of the 6th aspect, in the manufacture method of the shaft spring for railway vehicle described in the 5th, is characterized in that, the temperature t of described injection kettle T is set as more than the temperature of the degree of the flowing power not hindering half finished rubber g.
According to the invention of first aspect, the rubber used due to rubber layer is set to the rubber having coordinated the vulcanization accelerator with the critical temperature higher than the temperature of injection kettle during its contour forming, so, even if need some times at the rubber injecting unvulcanized state to shaping die from injection kettle, also can avoid or produce the improper situation starting sulfuration in injection kettle hardly.That is, because be warmed up to the temperature of sulfuration after being injected into shaping die, so be formed as the normal state of sulfuration after being accommodated regulation shape, can prevent or suppress rubber part defect or proterties local to change further.Its result, a kind of shaft spring for railway vehicle of improvement can be provided, what the improper situation can doing one's utmost to avoid the half finished rubber when contour forming to start sulfuration in injection kettle occurred may, after being filled to shaping die, starting sulfuration, decreasing reject rate and sought the stabilization of the quality as product.
As second aspect, if the temperature of shaping die is set to more than critical temperature, then with from making after injecting temperature rise to compared with the situation of more than critical temperature, process can be formed rapidly, can also capacity rating be improved.In addition, as the third aspect, as " having the vulcanization accelerator of the critical temperature also higher than the temperature injecting kettle ", the product of sulfenamide system is suitable.
According to the invention of fourth aspect, the quality of the shaft spring for railway vehicle of the composite structure adding pressure texture on the shear constitution being called as what is called " cone stop " can be improved.
According to the invention of the 5th aspect, because be set as inject kettle temperature≤vulcanization accelerator temperature≤shaping die temperature state under, carry out being injected and the shaping that formed and the sulfuration at shaping die to shaping die by half finished rubber, so the improper situation that the half finished rubber remained in injection kettle starts sulfuration first can not be occurred in the time needed for injection.Therefore, because be warmed up to the temperature of sulfuration after being injected into shaping die, so become the normal state of sulfuration after storage becomes regulation shape, can prevent or suppress rubber part defect or proterties local to change further.Its result, a kind of manufacture method of shaft spring for railway vehicle of improvement can be provided, what the improper situation can doing one's utmost to avoid the half finished rubber when contour forming to start sulfuration in injection kettle occurred may, after being filled to shaping die, starting sulfuration, decreasing reject rate and sought the stabilization of the quality as product.
According to the invention of the 6th aspect, smooth and easyly can carry out half finished rubber from injecting the injection of kettle to shaping die, eliminate result from so-called rubber layer local proterties change flowing power worsen improper situation, a kind of manufacture method further improving the quality of shaft spring for railway vehicle can be provided.
Accompanying drawing explanation
Fig. 1 is the cutaway view representing shaft spring for railway vehicle.
Fig. 2 is the planar view of the shaft spring for railway vehicle of Fig. 1.
Fig. 3 be represent the contour forming of shaft spring for railway vehicle just start after the cutaway view of state.
Half finished rubber when Fig. 4 is the contour forming representing shaft spring for railway vehicle injects the cutaway view of completion status.
Description of reference numerals
1 ... main shaft; 1a ... outer peripheral face; 2 ... urceolus; 2a ... inner peripheral surface; 3 ... elastic portion; 4 ... rubber layer; 5 ... hard next door; 21 ... mortar shape recess; K ... shaping die; P ... axle center; T ... inject kettle; G ... rubber (half finished rubber); K ... the temperature of shaping die K; R ... critical temperature; T ... inject the temperature of kettle.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of the embodiment of shaft spring for railway vehicle of the present invention and manufacture method thereof.
[embodiment 1]
The shaft spring for railway vehicle A of embodiment 1 is identical with the existing product structure shown in foregoing Fig. 1 and Fig. 2, main shaft 1 and have identical with it (or substantially identical) axle center P urceolus 2 between clamp the elastic portion 3 of lamination rubber structure and form, this elastic portion 3 with the state of axle center P concentric (or substantially concentric) under at the becket (hard next door routine) 5 of the radial inward-outward direction alternately cylindrical shape of lamination three layers (example of multilayer) rubber layer 4 and two layers (more than one deck is routine).In addition, when elastic portion 3 adopts lamination rubber structure, the number of becket 5 is the value that rubber layer 4 number subtracts 1.
As shown in Figure 1 and Figure 2, each leisure of inner peripheral surface 2a of outer peripheral face (outer peripheral face of axle top 1A) 1a, elastic portion 3 and the urceolus 2 of main shaft 1 is formed as mutually in the identical splayed towards gathering together enough along the cross sectional shape on the direction (being above-below direction in FIG) of axle center P.In addition, be configured to the shaft spring for railway vehicle A of the circular cone lamination rubber structure with mortar shape recess 21, this mortar shape recess 21 by make elastic portion 3 along axle center P direction relative main 1 near its path side configuration and make urceolus 2 along axle center P relative resilient portion, direction 3 near its path side configuration form.Other explanation is identical with existing product, omits unnecessary structure explanation at this.
Be with the difference of existing product, rubber (half finished rubber) g that rubber layer 4 uses setting becomes the vulcanization accelerator (following only referred to as " accelerator ") having coordinated and had the critical temperature r higher than the temperature t of the injection kettle T when its contour forming.Particularly, the temperature t injecting kettle T is set as " 90 DEG C≤t≤130 DEG C ", and the temperature k of shaping die K is set as 140 DEG C≤k≤170 DEG C.In addition, as an example of accelerator, use critical temperature to be the dibenzothiazyl disulfide of 134 DEG C or critical temperature to be the N-cyclohexyl-2-[4-morpholinodithio sulfenamide of 141 DEG C.
As the composition of half finished rubber g and the example of compounding ratio thereof, relative to natural rubber (NR; Rss#3) be 100, Zinc Oxide is 5, and stearic acid is 1, and microcrystalline wax is 1, and aging inhibitor is 2, and carbon black (N550) is 55, and aromatic naphtha is 5, and sulphur is 1.5, and accelerator is 1.5.In addition, as the example of accelerator with its critical temperature, N-cyclohexyl-2-[4-morpholinodithio sulfenamide (141 DEG C), N-oxygen diethyl-2-[4-morpholinodithio sulfenamide (145 DEG C), the N-tert-butyl group-2-[4-morpholinodithio sulfenamide (143 DEG C), dibenzothiazyl disulfide (134 DEG C), benzothiazolyl mercaptan (125 DEG C) can be enumerated.
As the elastomeric material of rubber layer 4 (half finished rubber g), also can be natural rubber, butadiene rubber (BR), buna-S (SBR) or mix their two or more materials.
At this, critical temperature is described.The minimum temperature that accelerator plays needed for " facilitation effect (sulfuration facilitation effect) " is called critical temperature (CriticalTemperature:CT).Accelerator is not the critical temperature with respective distinctive acumen, even the accelerator that how high safety is, if the low temperature below curing temperature, to place such as a long time at 70 DEG C, though more or less difference, all can show sulfation.Namely, so-called critical temperature, does not refer to said not sulfuration below it and in the such situation temperature clearly of its above sulfuration, can be described as a kind of notional temperature.
Such as, though thiambutosine is weak accelerator (accelerator that sulphurization is weak), carry out sulfuration at low temperatures, the tendency of scorching is strong.As indicated in this example, ultra accelerator (accelerator that sulphurization is superpower) is not low, but powerful accelerator (accelerator that sulphurization is strong) in general, CT is lower.For the material of the such hysteresis of sulfenamide system, semi-ultra accelerator (accelerator that sulphurization is accurate superpower) is many, but has CT to be inclined to more clearly compared with other accelerators.
Then, the manufacture method of shaft spring for railway vehicle A is described.Shaft spring for railway vehicle A of the present invention, makes basically by the contour forming identical with the existing method shown in Fig. 3, Fig. 4.Difference is, in the prior art, shaping die K and injection kettle T is set as the temperature higher than the critical temperature r of rubber layer 4; Relative to this, in manufacture method of the present invention, shaping die K is used for forming the half finished rubber g flowed into the state of having loaded main shaft 1, inside and outside becket 5,5 and urceolus 2, the temperature k of this shaping die K is set as more than the critical temperature r of the vulcanization accelerator be coupled in half finished rubber g, and the temperature t of the injection kettle T supplying half finished rubber g to shaping die K is set as described below critical temperature r, in such a state, half finished rubber g is injected from injection kettle T to shaping die K.
Range of temperatures about injecting kettle T: even if half finished rubber g is placed between certain period, also be difficult to promote sulfuration, and in order to produce the effect of the good fluidity making half finished rubber g self, the temperature t injecting kettle T is preferably set to 90 DEG C≤t≤130 DEG C, is preferably set for 100 DEG C≤t≤120 DEG C.Below 90 DEG C, when injecting half finished rubber g from injection kettle T, the flowing power of half finished rubber g is deteriorated.In addition, when being set to the temperature of more than 130 DEG C, because standing time is elongated, easily cause scorching (prevulcanization), mould flowing power is also deteriorated, and causes bad impact to the physical property of product.That is, so-called " not hindering the temperature of the degree of the flowing power of half finished rubber g " is 90 DEG C.
Range of temperatures about shaping die K: the temperature k of shaping die K usually can the temperature setting of scope of sulfuration by half finished rubber g, but the temperature being preferably 140 DEG C≤k≤170 DEG C in general.This is because when the temperature k of shaping die K is below 140 DEG C, suitable time of cure expends many, unfavorable in cost; Time more than 170 DEG C, when natural rubber system, easily there is reverse back phenomenon (vulcanization returning phenomena) and cause hydraulic performance decline.In addition, even if the critical temperature r of accelerator is lower than critical temperature r as described, under long-time placement, sulfuration is also slowly carried out, so, even if keep half finished rubber g in the injection kettle T long period, when its critical temperature r is high, the state of carrying out of sulfuration also latens slow.
As discussed above, adopt following manufacture method, namely be, as the vulcanization accelerator coordinated in the half finished rubber g that the rubber layer 4 at shaft spring for railway vehicle A uses, its critical temperature r is used to be the type of 125 DEG C ~ 145 DEG C, and, respectively the temperature k of shaping die K is set as 140 DEG C ~ 170 DEG C, and the temperature t injecting kettle T is set as 90 DEG C ~ 130 DEG C, be preferably 100 DEG C ~ 120 DEG C, carry out contour forming.Therefore, can without flowing power be deteriorated or prevulcanization may, half finished rubber g can be filled into shaping die K from injection kettle T, the temperature of sulfuration is warmed up to after being injected into shaping die K, namely be, become the normal state becoming the after cure of regulation shape in storage, can prevent or suppress rubber SOL or proterties local to change such situation further.
Its result, the shaft spring for railway vehicle improved can be provided, do one's utmost to avoid the half finished rubber g when contour forming in injection kettle T, start the possibility of the improper situation of sulfuration, start to carry out sulfuration after being filled in shaping die K, decrease reject rate and sought the stabilization of the quality as product.
[supplemental instruction]
For shaft spring for railway vehicle, being that needs are several rises the longitudinally longer of rubber and rubber product that is conically shape, can not adopt the compression molding sulfuration as the large-scale rubber-metal mould product becoming stable method for making in general.In addition, because time of cure is long and to inject path also long, so be also not suitable for injection, inject the injecting the mode of rubber at one stroke to each rubber layer space from multiple filler opening, namely employ the contour forming method (transmit and be shaped) of injection kettle and shaping die (metal paattern) of kettle so have employed to use.For this reason, injection kettle temperature is established height, the flowing power of rubber (half finished rubber) is established (height), but in the prior art, even if like this need several minutes owing to injecting, so the sulfuration that the part that there is half finished rubber meets accident starts and can not get stable performance or make pressure not too improve and the so improper situation of rubber defect is locally occurring because of good fluidity.
In addition, also exist and be coated on lining cement on becket etc. in advance due to the flowing of rubber of injecting at a relatively high temperature and the aspect easily peeled off.And then, the rubber layer space that volume is different separately when having the cardinal principle circular cone shape that is divided into inside and outside three positions, start to they inject rubber equably and inject do not complete time, becket likely can produce distortion.For this reason, though carried out the troublesome operation such as the appropriate change setting diameter of filler opening or quantity (quantity of circumference or the quantity of radial direction), but the defect produced by above-mentioned excessively good flowing power or the problem of prevulcanization still exist, and become the major cause causing product bad.
Therefore, in the present invention, by studying intensively and to injecting studying intensively of kettle temperature setting, injection kettle temperature be set in lower than the critical temperature of accelerator and do not hinder in the range of temperatures (90 DEG C ~ 130 DEG C) of the degree of half finished rubber flowing power accelerator.Thus, by making the temperature of injection kettle decline, half finished rubber can carry out to the injection of shaping die at suitable temperature and suitable pressure, and the various problems solving prior art can be provided to make the shaft spring for railway vehicle of stay in grade.
Claims (7)
1. a shaft spring for railway vehicle, the elastic portion (3) that this shaft spring for railway vehicle clamps lamination rubber structure between main shaft (1) and the urceolus (2) with the axle center (P) mutually identical with it forms, the elastic portion (3) of this lamination rubber structure under the state concentric with described axle center (P) in the radial inward-outward direction alternately multiple rubber layer of lamination (4) and more than one hard next door (5), it is characterized in that
Described rubber layer (4) forms shape by employing the transmission shaping of injecting kettle (T) and shaping die (K), described shaping die (K) is configured to have main metal paattern (8) and cover mold (9), this main metal paattern (8) is in there being bottom tube-like, this cover mold (9) is formed with the filler opening (19) for making half finished rubber flow into each rubber layer (4) spatial portion (s), this injection kettle (T) is configured to be had injection backing (10) and injects mould (11), this injection backing (10) is formed with the filler opening (20) for making half finished rubber flow into each rubber layer (4) spatial portion (s), and being fitted together to is placed on described cover mold (9), this injection mould (11) can slide up and down and be entrenched in described injection backing (10) movably, the rubber (g) that described rubber layer (4) uses is set to the rubber having coordinated vulcanization accelerator, this vulcanization accelerator has the critical temperature higher than the temperature (t) of the injection kettle (T) during its contour forming.
2. shaft spring for railway vehicle as claimed in claim 1, it is characterized in that, described critical temperature is set as below the temperature of the shaping die for carrying out vulcanization forming to described elastic portion.
3. shaft spring for railway vehicle as claimed in claim 1, it is characterized in that, described vulcanization accelerator is the vulcanization accelerator of sulfenamide system.
4. shaft spring for railway vehicle as claimed in claim 2, it is characterized in that, described vulcanization accelerator is the vulcanization accelerator of sulfenamide system.
5. the shaft spring for railway vehicle as described in any one of Claims 1 to 4, it is characterized in that, the each leisure of inner peripheral surface of the outer peripheral face of described main shaft, described elastic portion and described urceolus is formed as in the identical splayed towards gathering together enough along the cross sectional shape on the direction in described axle center, and
Described shaft spring for railway vehicle is configured to the circular cone lamination rubber structure with mortar shape recess, this mortar shape recess by make described elastic portion on the direction along described axle center relatively described main shaft near its path side configuration and make described urceolus on the direction along described axle center relatively described elastic portion near its path side configuration form.
6. the manufacture method of a shaft spring for railway vehicle, the elastic portion (3) that this shaft spring for railway vehicle clamps lamination rubber structure between main shaft (1) and the urceolus (2) with the axle center (P) mutually identical with it forms, the elastic portion (3) of this lamination rubber structure under the state concentric with described axle center (P) in the radial inward-outward direction alternately multiple rubber layer of lamination (4) and hard next door (5), it is characterized in that
When being shaped described rubber layer (4) by the transmission shaping employing injection kettle (T) and shaping die (K), the temperature (k) be used for the shaping die (K) that half finished rubber (g) forms is set as more than the critical temperature (r) of the vulcanization accelerator be coupled in half finished rubber (g), and the temperature (t) of the injection kettle (T) supplying half finished rubber (g) to described shaping die (K) is set as described critical temperature (r) below, in this condition, half finished rubber (g) is injected to described shaping die (K) from described injection kettle (T), described half finished rubber (g) is to have loaded described main shaft (1), the state of described more than one hard next door (5) and described urceolus (2) flows into,
Described shaping die (K) is configured to have main metal paattern (8) and cover mold (9), this main metal paattern (8) is in there being bottom tube-like, described injection kettle (T) is configured to be had injection backing (10) and injects mould (11), this injection backing (10) is chimeric to be placed on described cover mold (9), this injection mould (11) can slide up and down and be entrenched in movably in described injection backing (10)
Filler opening (19), (20) for making half finished rubber flow into each rubber layer (4) spatial portion (s) are formed at described cover mold (9) and described injection backing (10).
7. the manufacture method of shaft spring for railway vehicle as claimed in claim 6, is characterized in that, the temperature of described injection kettle is set as more than the temperature of the degree of the flowing power not hindering described half finished rubber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-283940 | 2009-12-15 | ||
| JP2009283940A JP2011127627A (en) | 2009-12-15 | 2009-12-15 | Shaft spring for railroad vehicle and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092400A CN102092400A (en) | 2011-06-15 |
| CN102092400B true CN102092400B (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010143174.5A Expired - Fee Related CN102092400B (en) | 2009-12-15 | 2010-03-29 | Shaft spring for railway vehicle and its manufacture method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011127627A (en) |
| CN (1) | CN102092400B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526291B (en) * | 2014-09-30 | 2017-06-30 | 株洲时代新材料科技股份有限公司 | A kind of compounded rubber backstop and its assemble method |
| JP7017391B2 (en) * | 2017-12-11 | 2022-02-08 | ニッタ化工品株式会社 | Shaft spring and its manufacturing method |
| JP2020063761A (en) * | 2018-10-16 | 2020-04-23 | ニッタ化工品株式会社 | Shaft spring |
| CN109372927A (en) * | 2018-12-24 | 2019-02-22 | 重庆巨九磊汽车零部件制造有限公司 | A kind of bottom cylinder |
| CN110816576B (en) * | 2019-11-11 | 2021-04-16 | 株洲时代瑞唯减振装备有限公司 | Method and device for improving fatigue life of elastic side bearing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931924Y (en) * | 2006-07-26 | 2007-08-08 | 姜海军 | Axle-box damping spring used in rail transit vehicle bogie |
| CN201227999Y (en) * | 2008-05-06 | 2009-04-29 | 株洲时代新材料科技股份有限公司 | Rubber metal layer spring of urban light rail system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3459875B2 (en) * | 1998-03-31 | 2003-10-27 | 太平洋工業株式会社 | Rubber molding method for tire valve |
| JP3845231B2 (en) * | 1999-08-20 | 2006-11-15 | 本田技研工業株式会社 | Defect judgment method of injection mold |
| JP4195257B2 (en) * | 2002-03-18 | 2008-12-10 | 財団法人鉄道総合技術研究所 | Railcar bogie |
| JP2005279949A (en) * | 2004-03-26 | 2005-10-13 | Hinode Rubber Kogyo Kk | Injection molding method of ring-shaped rubber product |
| JP2008303234A (en) * | 2007-06-05 | 2008-12-18 | Toyo Tire & Rubber Co Ltd | Unvulcanized rubber composition and vulcanized rubber |
| JP2009036292A (en) * | 2007-08-01 | 2009-02-19 | Toyo Tire & Rubber Co Ltd | Manufacturing method for suspension body or axle spring |
| CN100563776C (en) * | 2007-11-16 | 2009-12-02 | 广州机械科学研究院 | A kind of food EPT rubber filter-pressing plate and manufacture method thereof |
-
2009
- 2009-12-15 JP JP2009283940A patent/JP2011127627A/en active Pending
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- 2010-03-29 CN CN201010143174.5A patent/CN102092400B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2931924Y (en) * | 2006-07-26 | 2007-08-08 | 姜海军 | Axle-box damping spring used in rail transit vehicle bogie |
| CN201227999Y (en) * | 2008-05-06 | 2009-04-29 | 株洲时代新材料科技股份有限公司 | Rubber metal layer spring of urban light rail system |
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| Publication number | Publication date |
|---|---|
| JP2011127627A (en) | 2011-06-30 |
| CN102092400A (en) | 2011-06-15 |
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