CN102537208A - Polyurethane driving belt and method for making the same - Google Patents
Polyurethane driving belt and method for making the same Download PDFInfo
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- CN102537208A CN102537208A CN2011103821088A CN201110382108A CN102537208A CN 102537208 A CN102537208 A CN 102537208A CN 2011103821088 A CN2011103821088 A CN 2011103821088A CN 201110382108 A CN201110382108 A CN 201110382108A CN 102537208 A CN102537208 A CN 102537208A
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Abstract
The invention provides a polyurethane driving belt and a method for making the same, with the polyurethane driving belt capable of decreasing the friction factor upon the surface of the driving belt, improving the sliding performance of the belt relative to a belt wheel, and inhibiting the sounding for a long while. The belt body (2) is formed by the polyurethane elastic body which is added with a lubricant (oil(5)). A mat surface, as a contact surface of the belt wheel, comprises a tiny concave-convex portion (6) which repeatedly rises and falls in the length direction and width direction of the belt surface (3), with the arithmetic mean roughness of the belt surface (3) ranging from 4 to 25 microns.
Description
Technical field
The polyurethane system of the present invention relates to driving belt and production method thereof.
Background technique
As the raw material that are set up in the driving belt between a plurality of belt wheels, good and do not produce the viewpoint of abrasion bits from aesthetic appearance, polyurethane elastomer is widely used.But the friction factor of polyurethane elastomer is higher, therefore, under situation about directly using as driving belt, has the problem of being with and sounding that generation bigger relatively poor with respect to the sliding of belt wheel.In order to address the above problem, multiple technologies had been proposed in the past, the technology of record in the following patent documentation 1～3 is for example arranged.
In the technology of record, take in polyurethane elastomer, to add oiling agents such as grease in the patent documentation 1～3.Thus, the oiling agent in the polyurethane elastomer oozes out from the belt surface of conduct with the surface of contact of belt wheel through exosmosing.Through the effect of this oiling agent, reduced the friction factor of belt surface, thereby made band good, and suppressed sounding with respect to the sliding of belt wheel.
Patent documentation 1: japanese kokai publication hei 3-346 communique
Patent documentation 2: japanese kokai publication hei 5-133440 communique
Patent documentation 3: japanese kokai publication hei 11-264447 communique
But; In the technology of record, when band uses, shift the oiling agent that (exosmosing) oozes out to belt surface in the patent documentation 1～3; Break away from easily or disperse because of contacting with belt wheel; Therefore, can not fully obtain the reduction effect of the friction factor of the belt surface that oiling agent brings, still leave further band is carried out room for improvement with respect to the sliding of belt wheel and the inhibition of sounding.
Summary of the invention
Therefore; Proposition of the present invention is in order to address the above problem; Its purpose is to provide a kind of polyurethane system driving belt and production method thereof; Above-mentioned polyurethane system driving belt is through suppressing by disengaging and the dispersion of the oiling agent (by fat) that causes with contacting of belt wheel from belt surface, thereby can reduce the friction factor of belt surface for a long time, and can improve the inhibition of band with respect to the sliding and the sounding of belt wheel.
In order to solve above-mentioned problem; Polyurethane system driving belt of the present invention has the band main body that is made up of the polyurethane elastomer that has added oiling agent, is set up between a plurality of belt wheels; It is characterized in that; The belt surface of the conduct of said band main body and the surface of contact of said belt wheel, for having the roughened surface of the fine jog that rises and falls repeatedly on a plurality of length direction and width directions at this belt surface, the arithmetic average roughness of this belt surface is 4～25 μ m.
According to above-mentioned formation, shift the oiling agent that (exosmosing) oozes out to belt surface, with always getting into as quilt is accommodated with the recess of the jog of the belt surface of the surface of contact of belt wheel.Thus; Can suppress when using, because of contacting the oiling agent that causes with belt wheel from the disengaging of belt surface with disperse; Therefore, even the long-time band that uses, effect that also can be through oiling agent maintains reduced levels with the friction factor of belt surface; Its result is to improve the inhibition of band with respect to the sliding and the sounding of belt wheel for a long time.
For polyurethane system driving belt of the present invention, the recess of the said jog that preferably has at said belt surface contains the said oiling agent of transferring to said belt surface.
In addition, for polyurethane system driving belt of the present invention, preferred said oiling agent is a grease.And, the mean molecule quantity of preferred said grease be more than 500 and 2000 below scope.According to above-mentioned formation, because the mean molecule quantity of grease is 500 or more and 2000 following scopes, therefore; Grease in the polyurethane elastomer moves and oozes out from belt surface to belt surface with suitable speed in this polyurethane elastomer; And get into belt surface jog recess and accommodated, therefore, can be for a long time through grease be used for the friction factor of belt surface is maintained reduced levels; Its result is further to improve the inhibition of band with respect to the sliding and the sounding of belt wheel.
In addition, for polyurethane system driving belt of the present invention, preferred said grease is a lard.
In addition, for polyurethane system driving belt of the present invention, preferred said grease is to have more than 50 ℃ and the hardened oil of the fusing point below 80 ℃.According to above-mentioned formation, in use, when the temperature of band main body rose to about 50 ℃ degree, grease partly flowed, and was easy to transfer to the surface of band.
In addition; The production method of polyurethane system driving belt of the present invention; Be used to make and have the band main body that constitutes by the polyurethane elastomer that has added oiling agent and be set up in the polyurethane system line belt between a plurality of belt wheels; It is characterized in that, comprise: first operation cooperates oiling agent and curing agent to prepare carrying material in carbamate prepolymer; Second operation; Said carrying material is poured in the mould; Said mould has internal mold and external mold; And this internal molds face is to have the fine concavo-convex roughened surface that rises and falls repeatedly on a plurality of length direction and width directions at this outer circumferential face, and the arithmetic average roughness of this outer circumferential face is 4～25 μ m; The 3rd operation is solidified said carrying material, and the shape transferred thereon of the said jog of said internal molds face is carried out the demoulding behind belt surface.In addition, preferred said oiling agent is a grease.
According to above-mentioned formation; Can make following polyurethane system driving belt: the band main body is made up of the polyurethane elastomer that has added oiling agent; And as the belt surface with the surface of contact of said belt wheel is the roughened surface with the fine jog that rises and falls repeatedly on a plurality of length direction and width directions at this belt surface, and the arithmetic average roughness of this belt surface is 4～25 μ m.
In long-time, can reduce the friction factor of belt surface, and can improve the inhibition of band with respect to the sliding and the sounding of belt wheel.
Description of drawings
Fig. 1 is the partial perspective view of the related polyurethane system driving belt of first mode of execution of the present invention.
Fig. 2 is the stereogram of mould.
Fig. 3 (a) is the sectional drawing of the X face of mould shown in Figure 2, (b) is the drawing in side sectional elevation of mould shown in Figure 2.
Fig. 4 is the partial perspective view of the related polyurethane system driving belt of second mode of execution of the present invention.
Fig. 5 is the figure of correlation of arithmetic average roughness and the friction factor of expression embodiment 1～5 and comparative example 3,5.
Label declaration
1 201 toothed belts (polyurethane system driving belt)
2 202 band main bodys
3 203 belt surfaces
4 204 tooth portions
5 greases
6 jogs
The 6a recess
7 heart yearns
30 moulds
31 external molds
32 internal molds
32a internal molds face
Formation portion of 32b tooth portion
33 spaces
35 jogs
208 strengthen cloth
Embodiment
< first mode of execution >
Below, with reference to accompanying drawing first mode of execution of the present invention is described.
Polyurethane system driving belt involved in the present invention is to be set up in the driving belt that between a plurality of belt wheels and between these belt wheels, carries out transmission of power.Need to prove; At this; Example to polyurethane system driving belt involved in the present invention being applied to toothed belt describes, but polyurethane system involved in the present invention driving belt also can be applied to friction belt for power transmission or other driving belts such as flat rubber belting or V-type rib band.
(formation of band)
Many heart yearns 7 as shown in Figure 1, that the toothed belt 1 of this mode of execution has band main body 2 and in band main body 2, buries underground along the strip length direction.The material of heart yearn 7 is not special to be limited, and can use the low elongation that is made up of graphite fiber, aramid fibre, glass fibre, steel cord etc., the rope of high elasticity rate etc.In addition, on the belt surface that contact with belt wheel 3 of band main body 2, dispose a plurality of tooth portion 4 of meshing with predetermined interval with the tooth portion of belt wheel along the strip length direction.
(band main body 2)
Band main body 2 is made up of the polyurethane elastomer that is added with oiling agent (grease 5) (polyurethane elastomer).This grease 5 is in order to add in the polyurethane elastomer through transferring to the friction factor that belt surface 3 reduces belt surface 3.Below, specify and use the mode of grease, but in the scope of not damaging effect of the present invention, can suitably select normally used oiling agent to use as oiling agent.In addition, the polyurethane elastomer in this mode of execution can obtain by in NCO terminal amino group formic acid esters prepolymer, having cooperated the material of curing agent, plasticizing agent etc.The kind of curing agent is not special to be limited, and can enumerate for example ethylene glycol, 1, ammediol, 1, the amines of polyol compounds such as 4-butyleneglycol, primary amine, secondary amine, tertiary amine etc.As the plasticizing agent that uses, for example can enumerate: the dibasic acid esters such as fatty group dibasic acid beyond di adipates such as ditridecyl phthalates such as di-2-ethylhexyl phthalate, dioctyl phthalate, dibutyl phthalate, diethyl phthalate, diisooctyl phthalate, dioctyl adipate, diisodecyl adipate (DIDA), the related di adipate; Phosphate ester; Aromatic carboxylic acid esters; Epoxy is a plasticizing agent; And polyester is a plasticizing agent etc.These curing agent and plasticizing agent can be distinguished two or more alone or in combination uses.
NCO terminal amino group formic acid esters prepolymer can be through so that the NCO of the polyisocyanate compounds mode superfluous with respect to the mol ratio of hydroxyl groups be reacted obtains.The NCO terminal amino group formic acid esters prepolymer of this mode of execution does not then especially limit as long as in the carbamate prepolymer molecular chain, have the NCO more than 2 at least.The position of NCO in the carbamate prepolymer molecular chain is not special yet to be limited, and it is terminal to be in carbamate prepolymer molecular chain main chain, also can be in side chain terminal.
As above-mentioned polyol compound; Particularly can enumerate PPG classes such as polyethyleneglycol, polypropylene glycol, PolyTHF, make omega-dicarboxylic acids such as adipic acid, decanedioic acid, itaconic acid, maleic anhydride, terephthalic acids, isophthalic acid, fumaric acid, succinic acid, oxalic acid, malonic acid, glutaric acid, pimelic acid, suberic acid, azelaic acid and ethylene glycol, diethylene glycol, propylene glycol, 1; 4-butyleneglycol, 1; 6-hexitol, neopentyl glycol, 1; 2-propylene glycol, 1; Ammediol, 1,9-nonanediol, 3-methyl isophthalic acid, polyester polyols alcohols, the polycaprolactone polyol that polyol compounds such as 5-pentanediol, tripropylene glycol, trimethylolpropane, glycerine reactions obtains, gather-polylactones such as Beta-methyl-δ-Wu Neizhi are polyester polyols alcohols etc.
In addition, as above-mentioned isocyanates, can enumerate: 2; 4-toluene di-isocyanate(TDI), 2; 6-toluene di-isocyanate(TDI), 4,4 '-methyl diphenylene diisocyanate, 1,5 '-naphthalene diisocyanate, dimethyl diphenyl vulcabond, diphenyl methyl methane diisocyanate, tetraalkyl methyl diphenylene diisocyanate, 4; 4 '-dibenzyl vulcabond, 1,3-phenylene vulcabond etc.
(jog 6)
The belt surface 3 of band main body 2 is the roughened surfaces (so-called pears surface) with the fine jog 6 that rises and falls repeatedly on a plurality of length direction and width directions at this belt surface 3.The grease 5 that adds in the polyurethane elastomer will pass through from soft section of polyurethane elastomer, transfer to belt surface 3, thereby be accommodated among the recess 6a of this jog 6.Like this, the grease 5 of transferring to belt surface 3 is accommodated in the recess 6a of jog 6, therefore; Can suppress when using because of contact the grease 5 that causes with belt wheel from the disengaging of belt surface 3 with disperse, even long-time use, the effect that also can utilize grease maintains lower level with the friction factor of belt surface 3; Therefore; Its result does, can make band good with respect to the sliding of belt wheel for a long time, and can the long term inhibition sounding.
In addition, the friction factor of belt surface 3 is preferably for example 0.21～0.32 scope, more preferably 0.21～0.3 scope when measuring with the thin slice body according to following method.Friction factor was less than 0.21 o'clock, and the sounding during tape running diminishes, but sometimes with the release property variation of formed body from mould.On the other hand, if friction factor surpasses 0.32, then the sounding during tape running becomes big sometimes.
The experimental technique of above-mentioned friction factor carries out based on JIS K7125-1999 " plastic pellicle and thin slice test method of friction coefficient ".Sample (thin slice body) is arranged on the subject material (fixing) that is formed by identical material with this sample, upload the plating hard chromium rounding cylindricality counterweight of putting diameter 38mm φ, quality 200g (normal force N) at sample after, with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) when beginning to slide, calculate coefficientoffriction (μ=F/N) by this frictional force F with load cell.
In addition, for the sounding during for tape running, when carrying out following sounding test through the profile of tooth belt body, be preferably 80～90dB.
Above-mentioned sounding test does; 24 teeth) and the driven pulley (number of teeth: 24 teeth) sample (toothed belt) is set up in the driving pulley (number of teeth:; And band application added predetermined tension force, through the DC motor driving pulley is rotated with rotating speed 1200rpm, connection to load follower 25.0Nm.Then, near the center of two belt wheels of the advancing side of band and leave the position configuration MIC microphone of band 20mm, measure sounding.
In addition, toothed belt 1 is installed on the drive unit of big machinery device, and under the situation about under high load condition, turning round; The distortion of the change of the tooth pitch of tooth portion 4, tooth portion 4 increases, and quickens the wearing and tearing on the surface (belt surface 3) of tooth portion 4, still; If use with graphite fiber or aramid fibre heart yearn as the high elasticity rate of representative as heart yearn 7; Then can eliminate such problem, long term maintenance jog 6 further improves the inhibition of band with respect to the sliding and the sounding of belt wheel.
In addition, the arithmetic average roughness of this belt surface 3 (Ra) is set at the scope of 4～25 μ m.The lower limit of the arithmetic average roughness (Ra) of belt surface 3 is made as the reasons are as follows of 4 μ m; If less than 4 μ m; Then the size of jog 6 becomes too small; Become at recess 6a and can not fully accumulate grease, its result does, become in the time of can not fully being suppressed at band and using, because of contacting the grease 5 that causes with belt wheel from the disengaging of belt surface 3 with disperse.In addition, the reason that the upper limit of the arithmetic average roughness (Ra) of belt surface 3 is made as 25 μ m is if that bigger than 25 μ m, then the size of jog 6 becomes excessive, the release property variation.
Need to prove that above-mentioned arithmetic average roughness (Ra) is based on that JIS B0601-2001 " surface roughness-definition and expression " measures and the value that obtains.In this mode of execution; Through surface roughness measurement device サ one Block テ ス ト 500 (Mitutoyo corporate system) belt surface is measured; With intercepting value (cut-off-value) be made as 2.5mm, travelling speed is made as 2.0mm/ second, draws the figure of surface roughness, takes out the part of evaluation length L (L=12.5mm); The center line (average line) of this taking-up part is made as the X axle; Longitudinal direction is made as the Y axle, and with Y=f (X) when representing roughness curve, the value (being scaled the value of μ m unit) that will be obtained by following (formula 1) is as arithmetic average roughness (Ra).
(by fat 5)
As stated, grease 5 is transferred to belt surface 3, reduces the friction factor of belt surface 3 thus.At this, grease is meant the ester of more fatty acid of carbon number (higher fatty acids) and glycerine.As the kind of grease 5, as the animality hard fat lard or butter etc. are for example arranged, as the vegetalitas hard fat coconut wet goods is arranged.In addition, the fatty acid amide that also can dual-purpose uses as oiling agent usually.
In addition, as other example of grease 5, also can use fusing point is more than 50 ℃ and the grease below 80 ℃ (hardened oil).Have the grease of such fusing point through use, when rising to about 50 ℃ with the temperature of main body in use, grease partly flows, thereby is easy to transfer to the surface of band.As the grease (hardened oil) of 50～80 ℃ of fusing points, for example can enumerate: soybean hardened oil, soybean be hardened oil, vegetable seed hardened oil, the vegetable seed hardened oil that wet goods is derived by vegetable oil that extremely hardens extremely; With butter hardened oil, butter hardened oil, lard hardened oil, lard hardened oil, house oil hardened oil, house oil hardened oil, whale oil hardened oil, the whale oil hardened oil that wet goods is derived by animal oil that extremely hardens extremely extremely extremely.In these hardened oils, butter hardened oil or butter extremely hardened oil, soybean hardened oil or soybean extremely hardened oil, vegetable seed hardened oil or the vegetable seed wet goods that extremely hardens be widely used.
As the method for adding grease 5 to NCO terminal amino group formic acid esters prepolymer; Following method is arranged; That is, with the above temperature of the fusing point (for example under the situation of lard being 30～38 ℃) of grease 5 grease is heated that it is become is liquid, be added in the NCO terminal amino group formic acid esters prepolymer then and stir; Further then mixed curing agent also stirs, in the mould of stating after being poured into then 30.
As the adding quantity of grease 5, under the situation of the toothed belt as this mode of execution, preferred polyurethane 100 mass parts are relatively added the grease 5 of 0.5～10 mass parts.Its reason is, if the adding quantity of grease 5 is less than 0.5 mass parts, then the effect of grease 5 is little, possibly can't fully suppress sounding, and in addition, if the adding quantity of grease 5 surpasses 10 mass parts, then the rerum natura of polyurethane elastomer reduces, and possibly shorten as life-span of toothed belt.
In addition, be under the situation of friction belt for power transmission such as flat rubber belting or V-type rib band at polyurethane system driving belt, preferred polyurethane 100 mass parts are relatively added the grease 5 of 0.5～7 mass parts.This reason is; If the adding quantity of grease 5 is less than 0.5 mass parts, then the effect of grease 5 is less, possibly can't fully suppress sounding; In addition; If the adding quantity of grease 5 surpasses 7 mass parts, then under the situation of the friction belt for power transmission that requires high pass power, possibly produce and slide and can not transmit predetermined power.
(production method of toothed belt 1)
Below, the production method of toothed belt 1 is described with reference to Fig. 2 and Fig. 3.In this mode of execution, in mould 30, pour into a mould carrying material, make its curing then, make the band formed body, cut off and to be with formed body, make a plurality of toothed belts 1.Below, specifically describe.
(mould 30)
At first, the structure to the mould 30 that is used to make toothed belt describes.Shown in Fig. 2 and Fig. 3 (a)～3 (b), mould 30 has the external mold cylindraceous 31 at the band end and the columned internal mold 32 that this external mold 31 is gone in intercalation, between external mold 31 and internal mold 32, has the space portion 33 of packwall material.
On the outer circumferential face 32a of internal mold 32, be concaved with the 32b of formation portion of tooth portion of the tooth portion 4 of a plurality of formation band main bodys 2 with predetermined interval along periphery.And; The outer circumferential face 32a of internal mold 32 is the roughened surfaces (so-called pears surface) with the fine jog 35 that rises and falls repeatedly on a plurality of length directions at outer circumferential face 32a (circumferencial direction) and the width direction, its arithmetic average roughness (Ra) is set at the scope of 4～25 μ m.Thus, the jog 6 of belt surface 3 forms through jog 35 transfer printings from the outer circumferential face 32a of this internal mold 32 when being shaped.
Die surface as the outer circumferential face 32a of internal mold 32 is handled (roughened surface processing), can enumerate methods such as sand blast, chemical etching processing.The condition of carrying out the situation that the roughened surface of the outer circumferential face 32a of internal mold 32 handles through sand blast is shown below.
(sand blast condition)
Spray regime: vertical compression air type
Jet pressure: 5～10kg/cm
2
Bulk range: 10～20cm
Discharge time: 60～120 seconds
Shot material: polygon steel sand
Shot material hardness: Hv790～950
Shot material size: (1) 0.177～0.710mm (G-50 of record among the JIS Z0311 (2004)) ... 5～12 μ m (sandblast face surface roughness)
(2) 1.00～1.68mm (G-140 of record among the JIS Z0311 (2004)) ... 12～20 μ m (sandblast face surface roughness)
Then, the production method to the toothed belt 1 of the mould 30 that used above-mentioned explanation describes.
At first, in advance will with helical coil around internal mold 32 intercalations of heart yearn 7 go into external mold 31.
Then, in carbamate prepolymer, cooperate grease and curing agent to prepare carrying material (first operation).Be preferably the grease 5 through in aqueous NCO terminal amino group formic acid esters prepolymer, adding fusion and stir, further cooperate curing agent then and mix, prepare aqueous carrying material thus.
This carrying material is poured into the space portion 33 (second operation) that is formed between external mold 31 and the internal mold 32.Need to prove, can pour into a mould the aqueous carrying material of fusion, also can pour into a mould the carrying material that has softened.
Then, above-mentioned carrying material is solidified, behind shape transferred thereon to belt surface, carry out the demoulding (the 3rd operation) the above-mentioned jog of above-mentioned internal molds face.Preferably under about 100 ℃～about 120 ℃ temperature conditions, make it crosslinked through preset time, the carrying material in being poured into space portion 33 will be with the formed body demoulding through crosslinked and after solidifying, separate external mold 31 and internal mold 32 from mould 30.Afterwards, will be with formed body to be cut into predetermined width, be divided into a plurality of toothed belts 1.
Can make toothed belt 1 through above operation.
According to the polyurethane system driving belt of this mode of execution of above explanation, the grease 5 of transferring to belt surface 3 will get among the recess 6a of conduct and the jog 6 of the belt surface 3 of the surface of contact of belt wheel and accommodated.Therefore; In the time of can being suppressed at band and using, because of contacting the grease 5 that causes with belt wheel from the disengaging of belt surface 3 with disperse, therefore, its result does; Even the long-time band that uses; Effect that also can be through grease 5 maintains lower level with the friction factor of belt surface 3, and its result is to improve the inhibition of band with respect to the sliding and the sounding of belt wheel for a long time.
In addition; According to this mode of execution, in polyurethane elastomer, be added with mean molecule quantity and be under the situation of grease 5 of the scope more than 500 and below 2000, the grease 5 in the polyurethane elastomer moves and oozes out from belt surface 3 to belt surface 3 with suitable speed in this polyurethane elastomer; Thereby get into belt surface 3 jog 6 recess 6a and accommodated; Therefore, in long-time, effect that can be through grease 5 maintains reduced levels with the friction factor of belt surface 3; Its result is further to improve the inhibition of band with respect to the sliding and the sounding of belt wheel.
In addition; According to this mode of execution, in polyurethane elastomer, being added with fusing point is under the situation of the grease 5 (hardened oil) more than 50 ℃ and below 80 ℃, when rising to about 50 ℃ degree with the temperature of main body in use; Grease partly flows, and is easy to transfer to the surface of band.
In addition; According to this mode of execution; Owing to make polyurethane system driving belt in the mould that is described below through carrying material is poured into, wherein, said mould has internal mold 32 and external mold 31; And the outer circumferential face 32a of this internal mold 32 is the roughened surface with the trickle jog 35 that rises and falls repeatedly on a plurality of length direction and width directions at this outer circumferential face 32a; And the arithmetic average roughness of this outer circumferential face 32a is 4～25 μ m, therefore, can make following polyurethane system driving belt; The belt surface 3 of its conduct and the surface of contact of belt wheel is for having the roughened surface of the trickle jog 6 that rises and falls repeatedly on a plurality of length direction and width directions at belt surface 3, and the arithmetic average roughness of this belt surface 3 is 4～25 μ m.
< second mode of execution >
Below, second mode of execution of the present invention is described.Wherein, for parts, use identical label and suitably omit its explanation with formation identical with first mode of execution.
As shown in Figure 4, the toothed belt 201 of this mode of execution has many heart yearns 7, the part of being with main body 202, in band main body 202, burying underground along the strip length direction and is embedded in the reinforcement cloth 208 in the band main body 202.Identical with first mode of execution, band main body 202 is made up of the polyurethane elastomer that is added with grease (polyurethane elastomer).In addition, on the belt surface 203 of band main body 202, dispose a plurality of tooth portion 204 with the tooth portion of belt wheel engagement with predetermined interval along the strip length direction.In addition, the belt surface 203 of band main body 202 is for having the roughened surface (so-called pears surface) of a plurality of fine jogs, and the grease of transferring to belt surface 203 is accommodated in the recess.
Strengthening cloth 208 is disposed in the transmission of power of tooth bottom surface and tooth portion 204 of 204 in tooth portion regional (height on top that will be from the heart yearn position to tooth portion 204 is made as under the situation of H, apart from heart yearn position 2/3H with interior zone).Strengthen cloth 208 mode curved configuration to heave in the transmission of power zone, the transmission of power zone is strengthened to the tooth top side.Need to prove that the transmission of power zone is to receive from the bigger compressive stress of belt wheel and bear the zone of transmission of power.
The short fibres such as polyethylene, polypropylene, polyamide, polyester, acrylic resin, glass of strengthening cloth 208 and being with for example long 5～60mm are raw material, and the nonwovens through acupuncture etc. is shaped does not preferably carry out coagulation treatment.Therefore, on the surface of strengthening cloth 208, the short fibre fluffing.That is the front end that, is fixed in the short fibre on the surface of strengthening cloth 208 leaves the surface of strengthening cloth 208 and holds up.In addition, a part that constitutes the short fibre of strengthening cloth 208 is separated diffusion from strengthening cloth 208.Thus, short fibre is random arrangement in the transmission of power zone, and the transmission of power zone is strengthened.
Then, the production method to toothed belt 201 describes.
According to the toothed belt 201 of this mode of execution, utilize the short fibre of strengthening cloth 208 and separating from reinforcement cloth 208, can strengthen the transmission of power zone of tooth portion 204.Its result is can prevent at the root of tooth portion 204 crack to take place.In addition, can obtain the effect identical with first mode of execution.
More than, based on accompanying drawing mode of execution of the present invention is illustrated, still, should think that concrete formation is not limited to these mode of executions and embodiment.Scope of the present invention is not the explanation that is merely above-mentioned mode of execution and embodiment, but comprise by the scope shown in claims and with impartial implication of the scope of claim and the whole distortion in the scope.
Embodiment
In order to confirm effect of the present invention, the laminar sample of embodiment (embodiment 1～10) and comparative example (comparative example 1～5) is carried out the friction factor test.In addition, when making these samples, the investigation release property.
The aqueous carrying material of cast in the smooth mould (100mm * 100mm * dark 2mm) that preheats to 100 ℃; Under about 100 ℃～about 120 ℃ temperature, make its crosslinking curing through preset time; Carry out the demoulding then; Make thin slice, this thin slice is cut into 20mm * 20mm, thereby obtains the thin slice body as sample.The thickness of thin slice body is 2mm.
Aqueous carrying material as embodiment 1～5 and comparative example 3,5; Use following liquid polyurethane raw material (temperature regulation to 60 ℃): in polyethers carbamate prepolymer (Chemtura corporate system Adiprene-LF950A) 100 mass parts; Cooperation is as 3 of curing agent; 3 '-two chloro-4,4 '-diaminodiphenyl-methane, 13 mass parts, as lard 10 mass parts of grease and as dioctyl phthalate 10 mass parts of plasticizing agent.
In addition, aqueous carrying material of the embodiment 6～10 uses butter hardened oils (Japan Oil Co's system, 54 ℃ of fusing points, iodine number 23.5) to replace lard as grease, in addition, makes its aqueous urethane raw with embodiment 1～5 and comparative example 3,5 identical.
In addition, as the aqueous carrying material of comparative example 1,2,4, the material behind the lard (grease) is removed in use from the aqueous urethane raw of embodiment 1～5 and comparative example 3,5.
In addition, in embodiment 1～10 and comparative example 1,2,5, as mould, the use internal surface makes it become roughened surface through sand blast and has the mould of the arithmetic average roughness shown in the table 1 (Ra).
In addition, in comparative example 3,4, as mould, the use internal surface does not carry out sand blast and has the mould of the arithmetic average roughness shown in the table 1 (Ra).
The arithmetic average roughness (Ra) of the thin slice surface of each embodiment and each comparative example is roughly the same with the arithmetic average roughness of mould inner surface shown in the table 1.Arithmetic average roughness (Ra) for based on JIS B0601-1994 " surface roughness-definition and expression " measure the value that obtains, concrete determining method is identical with the described method of above-mentioned mode of execution.In addition, also show the having or not of grease of each embodiment and each comparative example in the table 1.
[table 1]
(release property)
The easy property of peeling off to above-mentioned thin slice during from mold releasability is estimated, and its result is illustrated in table 1.With thin slice can easily peel off and not the elongation average evaluation be zero, the average evaluation that thin slice limit elongate edge is peeled off is △.
(friction factor test)
The friction factor test is carried out based on JIS K7125 (1999) " plastic pellicle and thin slice test method of friction coefficient ".Sample (thin slice body, 1.4g) is arranged on the subject material (fixing) that is formed by identical material with this sample, upload the plating hard chromium rounding cylindricality counterweight of putting diameter 38mm φ, quality 200g (normal force N) at sample after, with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) when beginning to slide, calculate coefficientoffriction (μ=F/N) by this frictional force F with load cell.This result also is shown in table 1.In addition, for embodiment 1～5 and comparative example 3,5, the arithmetic average roughness (Ra) on surface and the relation of coefficientoffriction are illustrated among the figure of Fig. 5.
Result by table 1 expression can know, in surperficial arithmetic average roughness (Ra) comparative example 5 bigger than scope of the present invention, from the release property variation of mould.
In addition, like table 1 and shown in Figure 5, can know through adding grease to make friction factor less than 0.32.In addition, can know arithmetic average roughness (Ra) on the surface than in the little comparative example 3 and 4 of the scope of the invention, friction factor has the tendency of increase.
In order further to confirm effect of the present invention, carry out friction factor test and sounding test for following embodiment's 11,12 toothed belt.
Embodiment 11,12 toothed belt is for having the band of strengthening cloth with above-mentioned second mode of execution equally, through using mould 30 shown in Fig. 2 and Fig. 3 (a)～(b) according to following sequentially built.
Install at the outer circumferential face 32a of internal mold 32 and to strengthen cloth, twine heart yearn above that after, this internal mold 32 is inserted among the external mold 31, afterwards, make aqueous carrying material be full of the space portion 33 between internal mold 32 and the external mold 31, and make its curing.Then, the canular band formed body that obtains is cut into width 15mm, with the toothed belt that obtains (mark cun S8M560) as sample.
As embodiment 11,12 reinforcement cloth, use the nonwovens of the tubular of the 6.6 nylon fibers formation of not carrying out coagulation treatment through the acupuncture shaping.The thickness of nonwovens is 1.3mm.In addition, this nonwovens is made up of core and surface portion, and the weight per unit area of core is 30g/m
2, each surface portion weight per unit area be 70g/m
2
As the heart yearn of embodiment 11, use the non-twist high multifilament yarn that constitutes by carbon fiber (eastern レ Co., Ltd. system, production code member " T700GC6K31E ", fiber number 4300 Denier).
In addition, as embodiment 12 heart yearn, use the twisted filament (Teijin Ltd's system, trade name " テ Network ノ one ラ ") of aramid fibre.Aqueous carrying material of the embodiment 11,12 uses and the foregoing description 6～10 identical materials.
In addition, as embodiment 11,12 mould, the outer circumferential face 32a of use internal mold 32 forms roughened surface through sand blast and has the mould of the arithmetic average roughness shown in the table 2 (Ra).
The arithmetic average roughness (Ra) on the tooth portion surface of the toothed belt that obtains (sample) is roughly the same with the arithmetic average roughness of the internal molds face shown in the table 2.
[table 2]
(friction factor test)
The friction factor test is carried out after running test is carried out 72 hours.Running test does; 24 teeth) and the driven pulley (number of teeth: 24 teeth) sample (toothed belt) is set up in the driving pulley (number of teeth:; And band application added predetermined tension force, through the DC motor driving pulley is rotated with rotating speed 3600rpm, connection to load follower 25.0Nm.
The friction factor test does; Sample after the above-mentioned running test (toothed belt, 1.6g) is arranged at by identical material with this sample constitutes and have on the belt body (fixing) of three slot parts; Making the tooth portion and the slot part of each band is chimeric state; After uploading the plating hard chromium rounding cylindricality counterweight of putting diameter 38mm φ, quality 200g (normal force N) at sample, with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) when beginning to slide, calculate coefficientoffriction (μ=F/N) by this frictional force F with load cell.This result also is illustrated in table 2.
(sounding test)
The sounding test does; 24 teeth) and the driven pulley (number of teeth: 24 teeth) sample (toothed belt) is set up in the driving pulley (number of teeth:; And band application added predetermined tension force, through the DC motor driving pulley is rotated with rotating speed 1200rpm, connection to load follower 25.0Nm.Then, near the center of two belt wheels of the advancing side of band and leave the position configuration MIC microphone of band 20mm, measure sounding.This result also is illustrated in table 2.
Result by table 2 can know, as the material of heart yearn, compares with the situation of having used aramid fibre, under the situation of using graphite fiber, can reduce friction factor, and can suppress sounding.
Though describe the present invention in detail and with reference to embodiment, make various improvement and variation without departing from the spirit and scope of the present invention therein, be conspicuous to those skilled in the art.
The present invention is based on Japanese patent application 2011-065645 that the Japanese patent application 2010-263557 that submitted on November 26th, 2010, on March 24th, 2011 submit to, and the Japanese patent application 2011-180454 that submitted on August 22nd, 2011, and its content is incorporated herein by reference herein.
Claims (8)
1. a polyurethane system driving belt has the band main body that is made up of the polyurethane elastomer that has added oiling agent, is set up between a plurality of belt wheels, it is characterized in that,
The belt surface of the conduct of said band main body and the surface of contact of said belt wheel, for having the roughened surface of the fine jog that rises and falls repeatedly on a plurality of length direction and width directions at this belt surface, the arithmetic average roughness of this belt surface is 4～25 μ m.
2. polyurethane system driving belt as claimed in claim 1, wherein, the recess of the said jog that has at said belt surface contains the said oiling agent of transferring to said belt surface.
3. according to claim 1 or claim 2 polyurethane system driving belt, wherein, said oiling agent is a grease.
4. polyurethane system driving belt as claimed in claim 3, wherein, the mean molecule quantity of said grease be more than 500 and 2000 below scope.
5. like claim 3 or 4 described polyurethane system driving belts, wherein, said grease is a lard.
6. polyurethane system driving belt as claimed in claim 3, wherein, said grease is to have more than 50 ℃ and the hardened oil of the fusing point below 80 ℃.
7. the production method of a polyurethane system driving belt is used to make and has the band main body that is made up of the polyurethane elastomer that has added oiling agent and be set up in the polyurethane system line belt between a plurality of belt wheels, it is characterized in that, comprises:
First operation cooperates oiling agent and curing agent to prepare carrying material in carbamate prepolymer;
Second operation; Said carrying material is poured in the mould; Said mould has internal mold and external mold; And this internal molds face is to have the fine concavo-convex roughened surface that rises and falls repeatedly on a plurality of length direction and width directions at this outer circumferential face, and the arithmetic average roughness of this outer circumferential face is 4～25 μ m;
The 3rd operation is solidified said carrying material, and the shape transferred thereon of the said jog of said internal molds face is carried out the demoulding behind belt surface.
8. the production method of polyurethane system driving belt as claimed in claim 7, wherein, said oiling agent is a grease.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010263557 | 2010-11-26 | ||
| JP2010-263557 | 2010-11-26 | ||
| JP2011-065645 | 2011-03-24 | ||
| JP2011065645 | 2011-03-24 | ||
| JP2011180454 | 2011-08-22 | ||
| JP2011-180454 | 2011-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537208A true CN102537208A (en) | 2012-07-04 |
| CN102537208B CN102537208B (en) | 2015-05-06 |
Family
ID=46344887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110382108.8A Expired - Fee Related CN102537208B (en) | 2010-11-26 | 2011-11-25 | Polyurethane driving belt and method for making the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5846869B2 (en) |
| CN (1) | CN102537208B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534022A (en) * | 2014-10-17 | 2015-04-22 | 佛山美克斯动力传动产品有限公司 | Transmission belt and production technology thereof |
| CN104632998A (en) * | 2015-01-30 | 2015-05-20 | 无锡科诺达电子有限公司 | V-shaped transmission belt |
| CN104963998A (en) * | 2015-06-26 | 2015-10-07 | 广东元星工业新材料有限公司 | Integrated polyurethane synchronous belt and manufacturing method thereof |
| CN106170641A (en) * | 2014-03-31 | 2016-11-30 | 三之星机带株式会社 | Cog belt |
| CN107065481A (en) * | 2015-12-04 | 2017-08-18 | 兄弟工业株式会社 | The method of fixing device and manufacture fixing device |
| CN109503878A (en) * | 2018-10-24 | 2019-03-22 | 中国科学院兰州化学物理研究所 | A kind of preparation method of rubber seal surface antifriction and oil storage film layer |
| US10716912B2 (en) | 2015-03-31 | 2020-07-21 | Fisher & Paykel Healthcare Limited | User interface and system for supplying gases to an airway |
| US11324908B2 (en) | 2016-08-11 | 2022-05-10 | Fisher & Paykel Healthcare Limited | Collapsible conduit, patient interface and headgear connector |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6532454B2 (en) * | 2014-03-24 | 2019-06-19 | バンドー化学株式会社 | Friction transmission belt |
| JP5839643B1 (en) * | 2014-03-24 | 2016-01-06 | バンドー化学株式会社 | Friction transmission belt and manufacturing method thereof |
| JP6606086B2 (en) * | 2014-09-24 | 2019-11-13 | バンドー化学株式会社 | Toothed belt |
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| JP2008144965A (en) * | 2006-11-14 | 2008-06-26 | Mitsuboshi Belting Ltd | Polyurethane toothed belt and its manufacturing method |
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- 2011-11-25 CN CN201110382108.8A patent/CN102537208B/en not_active Expired - Fee Related
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| JPS6415553A (en) * | 1987-07-10 | 1989-01-19 | Aisin Seiki | Driving belt |
| CN2210283Y (en) * | 1994-01-21 | 1995-10-18 | 刘亚茹 | Speed changeable V-shape driving belt |
| CN2351613Y (en) * | 1996-12-17 | 1999-12-01 | 郑玉山 | Driving belt |
| CN101326386A (en) * | 2006-07-14 | 2008-12-17 | 坂东化学株式会社 | Friction driving belt and process for manufacturing the same |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106170641A (en) * | 2014-03-31 | 2016-11-30 | 三之星机带株式会社 | Cog belt |
| CN106170641B (en) * | 2014-03-31 | 2018-09-07 | 三之星机带株式会社 | Toothed belt |
| CN104534022A (en) * | 2014-10-17 | 2015-04-22 | 佛山美克斯动力传动产品有限公司 | Transmission belt and production technology thereof |
| CN104632998A (en) * | 2015-01-30 | 2015-05-20 | 无锡科诺达电子有限公司 | V-shaped transmission belt |
| US10716912B2 (en) | 2015-03-31 | 2020-07-21 | Fisher & Paykel Healthcare Limited | User interface and system for supplying gases to an airway |
| US11904097B2 (en) | 2015-03-31 | 2024-02-20 | Fisher & Paykel Healthcare Limited | User interface and system for supplying gases to an airway |
| CN104963998A (en) * | 2015-06-26 | 2015-10-07 | 广东元星工业新材料有限公司 | Integrated polyurethane synchronous belt and manufacturing method thereof |
| CN107065481A (en) * | 2015-12-04 | 2017-08-18 | 兄弟工业株式会社 | The method of fixing device and manufacture fixing device |
| US11324908B2 (en) | 2016-08-11 | 2022-05-10 | Fisher & Paykel Healthcare Limited | Collapsible conduit, patient interface and headgear connector |
| CN109503878A (en) * | 2018-10-24 | 2019-03-22 | 中国科学院兰州化学物理研究所 | A kind of preparation method of rubber seal surface antifriction and oil storage film layer |
| CN109503878B (en) * | 2018-10-24 | 2021-04-13 | 中国科学院兰州化学物理研究所 | Preparation method of surface antifriction and oil storage film layer of rubber sealing element |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013061062A (en) | 2013-04-04 |
| CN102537208B (en) | 2015-05-06 |
| JP5846869B2 (en) | 2016-01-20 |
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