CN102537208B - 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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- CN102537208B CN102537208B CN201110382108.8A CN201110382108A CN102537208B CN 102537208 B CN102537208 B CN 102537208B CN 201110382108 A CN201110382108 A CN 201110382108A CN 102537208 B CN102537208 B CN 102537208B
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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 present invention relates to polyurethane driving belt and manufacture method thereof.
Background technique
As the raw material of the driving belt be set up between multiple belt wheel, from the view point of aesthetic appearance excellent and do not produce abrasion bits, widely use polyurethane elastomer.But the friction factor of polyurethane elastomer is higher, therefore, when direct use as driving belt, there is band poor relative to the sliding of belt wheel and produce the problem of larger sounding.In order to solve the problem, propose multiple technologies in the past, such as, have the technology recorded in following patent documentation 1 ~ 3.
In the technology recorded in patent documentation 1 ~ 3, take to add the oiling agents such as grease in polyurethane elastomer.Thus, the oiling agent in polyurethane elastomer oozes out from the belt surface as the surface of contact with belt wheel by exosmosing.By the effect of this oiling agent, reduce the friction factor of belt surface, thus make band excellent relative to the sliding of belt wheel, and inhibit sounding.
Patent documentation 1: Japanese Unexamined Patent Publication 3-346 publication
Patent documentation 2: Japanese Unexamined Patent Publication 5-133440 publication
Patent documentation 3: Japanese Unexamined Patent Publication 11-264447 publication
But, in the technology recorded in patent documentation 1 ~ 3, when being with use, the oiling agent that transfer (exosmosing) is oozed out to belt surface, because easily departing from pulley contact or disperse, therefore, fully can not obtain the reduction effect of the friction factor of the belt surface that oiling agent brings, still leave and further relative to the sliding of belt wheel and the suppression of sounding, room for improvement is carried out to band.
Summary of the invention
Therefore, proposition of the present invention is to solve the problem, its object is to provide a kind of polyurethane driving belt and manufacture method thereof, above-mentioned polyurethane driving belt is by suppressing the oiling agent (by fat) that caused by the contact with belt wheel from the disengaging of belt surface and dispersion, thus the friction factor of belt surface can be reduced for a long time, and band can be improved relative to the sliding of belt wheel and the suppression of sounding.
In order to solve above-mentioned problem, polyurethane driving belt of the present invention, there is the band main body be made up of the polyurethane elastomer that with the addition of oiling agent, be set up between multiple belt wheel, it is characterized in that, the belt surface as the surface of contact with described belt wheel of described band main body, for having the roughened surface of the fine jog that multiple length direction at this belt surface and width direction rise and fall repeatedly, the arithmetic average roughness of this belt surface is 4 ~ 25 μm.
According to above-mentioned formation, the oiling agent that transfer (exosmosing) is oozed out to belt surface, is accommodated the recess of the jog of the belt surface always entered as the surface of contact with belt wheel.Thus, can inhibition zone when using, because of with pulley contact and the oiling agent that causes from the disengaging of belt surface with disperse, therefore, even if use band for a long time, also by the effect of oiling agent, the friction factor of belt surface can be maintained reduced levels, its result is, can improve band for a long time relative to the sliding of belt wheel and the suppression of sounding.
For polyurethane driving belt of the present invention, the recess of the described jog preferably had at described belt surface contains the described oiling agent transferring to described belt surface.
In addition, for polyurethane driving belt of the present invention, preferred described oiling agent is grease.And the mean molecule quantity of preferred described grease is the scope of more than 500 and less than 2000.According to above-mentioned formation, mean molecule quantity due to grease is the scope of more than 500 and less than 2000, therefore, grease in polyurethane elastomer moves to belt surface with suitable speed and oozes out from belt surface in this polyurethane elastomer, and enter the recess of the jog of belt surface and accommodated, therefore, the friction factor of belt surface can be used for maintain reduced levels for a long time by grease, its result is, can improve band further relative to the sliding of belt wheel and the suppression of sounding.
In addition, for polyurethane driving belt of the present invention, preferred described grease is lard.
In addition, for polyurethane driving belt of the present invention, preferred described grease is have more than 50 DEG C and the hardened oil of the fusing point of less than 80 DEG C.According to above-mentioned formation, in use, when the temperature of band main body rises to the degree of about 50 DEG C, the flowing of oil fraction ground, is easy to the surface transferring to band.
In addition, the manufacture method of polyurethane driving belt of the present invention, for the manufacture of there is the band main body be made up of the polyurethane elastomer that with the addition of oiling agent and the polyurethane line belt be set up between multiple belt wheel, it is characterized in that, comprise: the first operation, in carbamate prepolymer, coordinate oiling agent and curing agent to prepare carrying material; Second operation, described carrying material is poured in mould, described mould has internal mold and external mold, and the outer circumferential face of this internal mold is have the fine concavo-convex roughened surface that multiple length direction at this outer circumferential face and width direction rise and fall repeatedly, and the arithmetic average roughness of this outer circumferential face is 4 ~ 25 μm; 3rd operation, makes described carrying material solidify, and the shape transfer of the described jog of the outer circumferential face of described internal mold is carried out the demoulding after belt surface.In addition, preferred described oiling agent is grease.
According to above-mentioned formation, following polyurethane driving belt can be manufactured: band main body is made up of the polyurethane elastomer that with the addition of oiling agent, and be the roughened surface with the fine jog that multiple length direction at this belt surface and width direction rise and fall repeatedly as the belt surface of the surface of contact with described belt wheel, the arithmetic average roughness of this belt surface is 4 ~ 25 μm.
In long-time, the friction factor of belt surface can be reduced, and band can be improved relative to the sliding of belt wheel and the suppression of sounding.
Accompanying drawing explanation
Fig. 1 is the partial perspective view of the polyurethane driving belt involved by the first mode of execution of the present invention.
Fig. 2 is the stereogram of mould.
Fig. 3 (a) is the sectional drawing in the X face of mould shown in Fig. 2, and (b) is the drawing in side sectional elevation of mould shown in Fig. 2.
Fig. 4 is the partial perspective view of the polyurethane driving belt involved by the second mode of execution of the present invention.
Fig. 5 is the figure representing the arithmetic average roughness of embodiment 1 ~ 5 and comparative example 3,5 and the correlation of friction factor.
Label declaration
1 201 toothed belts (polyurethane driving belt)
2 202 band main bodys
3 203 belt surfaces
4 204 teeth portion
5 greases
6 jogs
6a recess
7 heart yearns
30 moulds
31 external molds
32 internal molds
The outer circumferential face of 32a internal mold
32b teeth portion forming portion
33 spaces
35 jogs
208 strengthen cloth
Embodiment
< first mode of execution >
Below, with reference to accompanying drawing, the first mode of execution of the present invention is described.
Polyurethane driving belt involved in the present invention to be set up between multiple belt wheel and between these belt wheels, to carry out the driving belt of transmission of power.It should be noted that, at this, example polyurethane driving belt involved in the present invention being applied to toothed belt is described, but polyurethane driving belt involved in the present invention also can be applied to friction belt for power transmission or other driving belt such as flat rubber belting or V-type ribbed belt.
(formation of band)
As shown in Figure 1, the toothed belt 1 of present embodiment has the many heart yearns 7 be with main body 2 and buried underground along strip length direction in band main body 2.The material of heart yearn 7 is not particularly limited, can use be made up of carbon fiber, aramid fibre, glass fibre, steel cord etc. low elongation, high elasticity rate rope etc.In addition, band main body 2 with on the belt surface 3 of pulley contact, be configured with the multiple teeth portion 4 engaged with the teeth portion of belt wheel with predetermined interval along strip length direction.
(band main body 2)
Band main body 2 is made up of the polyurethane elastomer (polyurethaneelastomer) being added with oiling agent (grease 5).This grease 5 is to reduce the friction factor of belt surface 3 by transferring to belt surface 3 and add in polyurethane elastomer.Below, special instruction uses grease as the mode of oiling agent, but in the scope not damaging effect of the present invention, can suitably select normally used oiling agent to use.In addition, the polyurethane elastomer in present embodiment can obtain by having coordinated the material of curing agent, plasticizing agent etc. in NCO terminal carbamate ester prepolymer.The kind of curing agent is not particularly limited, and can enumerate the amines etc. of the polyol compounds such as such as ethylene glycol, 1,3-PD, BDO, primary amine, secondary amine, tertiary amine.As the plasticizing agent used, can enumerate such as: the dibasic acid esters such as the fatty group dibasic acid beyond the di adipates such as the ditridecyl phthalates such as di-2-ethylhexyl phthalate, dioctyl phthalate, dibutyl phthalate, diethyl phthalate, diisooctyl phthalate, dioctyl adipate, diisodecyl adipate (DIDA), involved di adipate; Phosphate ester; Aromatic carboxylic acid esters; Epoxy plasticizing agent; And Polyester plasticizing agent etc.These curing agent and plasticizing agent can individually or be used in combination of two or more.
NCO terminal carbamate ester prepolymer, can by obtaining to make the NCO of polyisocyanate compounds carry out reacting relative to the mode of the mol ratio surplus of the hydroxyl of polyatomic alcohol polybasic alcohol.As long as the NCO terminal carbamate ester prepolymer of present embodiment has the NCO of more than at least 2 in carbamate prepolymer molecular chain, be not then particularly limited.The position of NCO in carbamate prepolymer molecular chain is also not particularly limited, and can be in carbamate prepolymer molecular chain main chain terminal, also can be in side chain terminal.
As above-mentioned polyol compound, specifically polyethyleneglycol can be enumerated, polypropylene glycol, the polyether polyols alcohols such as PolyTHF, make 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, the omega-dicarboxylic acids such as 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, 5-pentanediol, tripropylene glycol, trimethylolpropane, the polyester polyols alcohols that the polyol compounds such as glycerine are obtained by reacting, polycaprolactone polyol, the polylactone system polyester polyols alcohols etc. such as poly-Beta-methyl-δ-valerolactone.
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, diphenylmethyl dicyclohexylmethane diisocyanate, tetraalkyl methyl diphenylene diisocyanate, 4,4 '-dibenzyl diisocyanate, 1,3-phenylene vulcabond etc.
(jog 6)
Belt surface 3 with main body 2 is the roughened surfaces (so-called pears surface) with the fine jog 6 that multiple length direction at this belt surface 3 and width direction rise and fall repeatedly.The grease 5 added in polyurethane elastomer passes through from soft section of polyurethane elastomer, transfers to belt surface 3, thus is accommodated in the recess 6a of this jog 6.Like this, the grease 5 transferring to belt surface 3 is accommodated in the recess 6a of jog 6, therefore, can inhibition zone when using because of with pulley contact and the grease 5 that causes from the disengaging of belt surface 3 with disperse, even if use for a long time, the effect of grease also can be utilized the friction factor of belt surface 3 to be maintained lower level, therefore, its result is, band can be made for a long time good relative to the sliding of belt wheel, and can suppress sounding for a long time.
In addition, the friction factor of belt surface 3, when measuring according to following method sheet, is preferably the scope of such as 0.21 ~ 0.32, is more preferably the scope of 0.21 ~ 0.3.When friction factor is less than 0.21, sounding during tape running diminishes, but is sometimes with formed body to be deteriorated from the release property of mould.On the other hand, if friction factor is more than 0.32, then sometimes tape running time sounding become large.
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 (sheet) is arranged on the subject material (fixing) formed by material identical with this sample, after sample loads the plating hard chromium rounding cylindricality counterweight of diameter 38mm φ, quality 200g (normal force N), with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) started when sliding with load cell, calculate coefficientoffrictionμ (μ=F/N) by this frictional force F.
In addition, for sounding during tape running, be preferably 80 ~ 90dB when carrying out following vocalization test by profile of tooth belt body.
Above-mentioned vocalization test is, sample (toothed belt) is set up between driving pulley (number of teeth: 24 teeth) and driven pulley (number of teeth: 24 teeth), and predetermined tension force is applied to band, by DC motor, driving pulley is rotated with rotating speed 1200rpm, connection to load follower 25.0Nm.Then, band advancing side two belt wheels immediate vicinity and leave band 20mm position configuration MIC microphone, measure sounding.
In addition, toothed belt 1 is installed on the drive unit of big machinery device, and when operating under high loading conditions, the change of the tooth pitch of teeth portion 4, the distortion of teeth portion 4 increase, and accelerate the wearing and tearing on the surface (belt surface 3) of teeth portion 4, but, if use with the heart yearn of carbon fiber or the aramid fibre high elasticity rate that is representative as heart yearn 7, then can eliminate such problem, long term maintenance jog 6, improve band further relative to the sliding of belt wheel and the suppression of sounding.
In addition, the arithmetic average roughness (Ra) of this belt surface 3 is set as the scope of 4 ~ 25 μm.By as follows for the reason that the lower limit of the arithmetic average roughness (Ra) of belt surface 3 is set to 4 μm, if be less than 4 μm, then the size of jog 6 becomes too small, become fully can not accumulate grease at recess 6a, its result is, become can not fully suppress be with when using, because of with pulley contact and the grease 5 that causes from the disengaging of belt surface 3 with disperse.In addition, be that if larger than 25 μm, then the size of jog 6 becomes excessive, and release property is deteriorated by the reason that the upper limit of the arithmetic average roughness (Ra) of belt surface 3 is set to 25 μm.
It should be noted that, above-mentioned arithmetic average roughness (Ra) is the value measuring based on JIS B0601-2001 " surface roughness-definition and expression " and obtain.In present embodiment, by surface roughness measurement device サ mono-Block テ ス ト 500 (Mitutoyo Inc.), belt surface is measured, intercepting value (cut-off-value) is set to 2.5mm, travelling speed is set to 2.0mm/ second, draw the figure of surface roughness, take out the part of evaluation length L (L=12.5mm), the center line (average line) of this taking-up part is set to X-axis, longitudinal direction is set to Y-axis, when representing roughness curve with Y=f (X), using the value (being scaled the value of μm unit) that obtained by following (formula 1) as arithmetic average roughness (Ra).
(by fat 5)
As mentioned above, belt surface 3 transferred to by grease 5, reduces the friction factor of belt surface 3 thus.At this, grease refers to the ester of the fatty acid (higher fatty acids) that carbon number is more and glycerine.As the kind of grease 5, such as there are lard or butter etc. as animality hard fat, have coconut wet goods as vegetalitas hard fat.In addition, also can the fatty acid amide that uses usually used as oiling agent of dual-purpose.
Grease 5 such as preferably uses mean molecule quantity to be more than 500 and the grease of the scope of less than 2000.That, when being less than 500, grease is easy to move with speed faster in soft section of polyurethane elastomer, and therefore, the grease be in polyurethane elastomer is likely consumed in a short time by the reason that the lower limit of the mean molecule quantity of grease 5 is set to 500.In addition, that if mean molecule quantity is larger than 2000, then grease moves with speed slowly in soft section of polyurethane elastomer by the reason that the upper limit of the mean molecule quantity of grease 5 is set to 2000, thus being difficult to the effect occurring grease in early days, its result is for likely to produce sounding.The mean molecule quantity of lard (triglycerides containing a large amount of saturated fatty acid) is about 800, belt surface is transferred to by soft section of polyurethane elastomer with suitable speed, therefore, as have persistency grease and preferably, in addition, from the viewpoint of coordinating cost, operability also preferred.
In addition, as other example of grease 5, fusing point also can be used to be more than 50 DEG C and the grease (hardened oil) of less than 80 DEG C.By using the grease with such fusing point, when the temperature in use with main body rises to about 50 DEG C, the flowing of oil fraction ground, thus be easy to the surface transferring to band.As the grease (hardened oil) of fusing point 50 ~ 80 DEG C, can enumerate such as: the hardened oil that soybean hardened oil, soybean extreme hardened oil, vegetable seed hardened oil, vegetable seed extreme sclerosis wet goods are derived by vegetable oil; With the hardened oil that butter hardened oil, butter extreme hardened oil, lard hardened oil, lard extreme hardened oil, house oil hardened oil, house oil extreme hardened oil, whale oil hardened oil, whale oil extreme sclerosis wet goods are derived by animal oil.In these hardened oils, butter hardened oil or butter extremely hardened oil, soybean hardened oil or soybean extreme hardened oil, vegetable seed hardened oil or vegetable seed extreme sclerosis wet goods widely use.
As the method for adding grease 5 to NCO terminal carbamate ester prepolymer, there is following methods, namely, with the temperature more than fusing point of grease 5 (being 30 ~ 38 DEG C under such as pig oil condition) to grease heat become liquid, then to be added in NCO terminal carbamate ester prepolymer and to stir, then further mixed curing agent stirring, is then poured in mould 30 described later.
As the adding quantity of grease 5, when toothed belt as in this embodiment, preferably polyurethane 100 mass parts adds the grease 5 of 0.5 ~ 10 mass parts relatively.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 fully cannot suppress sounding, and in addition, if the adding quantity of grease 5 is more than 10 mass parts, then the physical property of polyurethane elastomer reduces, and the life-span as toothed belt may shorten.
In addition, when polyurethane driving belt is the friction belt for power transmission such as flat rubber belting or V-type ribbed belt, preferably polyurethane 100 mass parts adds the grease 5 of 0.5 ~ 7 mass parts relatively.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 fully cannot suppress sounding, in addition, if the adding quantity of grease 5 is more than 7 mass parts, then when requiring the friction belt for power transmission of high pass power, may produce and slide and predetermined power can not be transmitted.
(manufacture method of toothed belt 1)
Below, the manufacture method of toothed belt 1 is described with reference to Fig. 2 and Fig. 3.In present embodiment, pouring belt material in mould 30, then makes it solidify, and makes band formed body, cuts off this band formed body, manufacture multiple toothed belt 1.Below, be specifically described.
(mould 30)
First, the structure of the mould 30 for the manufacture of toothed belt is described.As shown in Fig. 2 and Fig. 3 (a) ~ 3 (b), mould 30 has the columned internal mold 32 being with the external mold 31 of the cylindrical shape at the end and intercalation to enter this external mold 31, has the space portion 33 of packwall material between external mold 31 and internal mold 32.
On the outer circumferential face 32a of internal mold 32, be circumferentially arranged with multiple teeth portion forming portion 32b forming the teeth portion 4 of band main body 2 with predetermined interval.And, the outer circumferential face 32a of internal mold 32 is the roughened surfaces (so-called pears surface) with the fine jog 35 that multiple length direction at outer circumferential face 32a (circumferencial direction) and width direction rise and fall repeatedly, its arithmetic average roughness (Ra) is set as the scope of 4 ~ 25 μm.Thus, the jog 6 of belt surface 3 is by being formed from jog 35 transfer printing of the outer circumferential face 32a of this internal mold 32 when being shaped.
As the die surface process (roughened surface process) of the outer circumferential face 32a of internal mold 32, the method such as sand blast, chemical etching process can be enumerated.The condition of the situation of being carried out the roughened surface process of the outer circumferential face 32a of internal mold 32 by 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 recorded in JIS Z0311 (2004)) ... 5 ~ 12 μm (sandblasting face surface roughness)
(2) 1.00 ~ 1.68mm (G-140 recorded in JIS Z0311 (2004)) ... 12 ~ 20 μm (sandblasting face surface roughness)
Then, the manufacture method of toothed belt 1 of the mould 30 employing above-mentioned explanation is described.
First, in advance internal mold 32 intercalation of the heart yearn 7 that spirally reeled is entered external mold 31.
Then, in carbamate prepolymer, coordinate grease and curing agent to prepare carrying material (the first operation).Preferably by adding the grease 5 of melting and stir in aqueous NCO terminal carbamate ester prepolymer, then coordinate curing agent further and mix, preparing aqueous carrying material thus.
This carrying material is poured into the space portion 33 (the second operation) be formed between external mold 31 and internal mold 32.It should be noted that, the aqueous carrying material of melting can be poured into a mould, also can pour into a mould the carrying material softened.
Then, above-mentioned carrying material is solidified, to belt surface, carry out the demoulding (the 3rd operation) in the shape transfer of the above-mentioned jog of the outer circumferential face by above-mentioned internal mold.Preferably under the temperature conditions of about 100 DEG C ~ about 120 DEG C, make it be cross-linked through predetermined time, be poured into the carrying material in space portion 33 through being cross-linked after solidification, separation external mold 31 and internal mold 32, will be with the formed body demoulding from mould 30.Afterwards, band formed body is cut into predetermined width, is divided into multiple toothed belt 1.
Toothed belt 1 can be manufactured by above operation.
According to the polyurethane driving belt of present embodiment described above, the grease 5 transferring to belt surface 3 is accommodated in the recess 6a of the jog 6 of the belt surface 3 entered as the surface of contact with belt wheel.Therefore, can suppress be with when using, because of with pulley contact and the grease 5 that causes from the disengaging of belt surface 3 with disperse, therefore, its result is, even if use band for a long time, also by the effect of grease 5, the friction factor of belt surface 3 can be maintained lower level, its result is, can improve band for a long time relative to the sliding of belt wheel and the suppression of sounding.
In addition, according to the present embodiment, be added with in polyurethane elastomer mean molecule quantity be more than 500 and grease 5 of the scope of less than 2000, grease 5 in polyurethane elastomer to move to belt surface 3 with suitable speed and oozes out from belt surface 3 in this polyurethane elastomer, thus enter the recess 6a of the jog 6 of belt surface 3 and accommodated, therefore, in long-time, by the effect of grease 5, the friction factor of belt surface 3 can be maintained reduced levels, its result is, can improve band further relative to the sliding of belt wheel and the suppression of sounding.
In addition, according to the present embodiment, be added with in polyurethane elastomer fusing point be more than 50 DEG C and grease 5 (hardened oil) of less than 80 DEG C, when the temperature in use with main body rises to the degree of about 50 DEG C, the flowing of oil fraction ground, is easy to the surface transferring to band.
In addition, according to the present embodiment, owing to manufacturing polyurethane driving belt by being poured in mould as described below by carrying material, wherein, described 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 multiple length direction at this outer circumferential face 32a and width direction rise and fall repeatedly, and the arithmetic average roughness of this outer circumferential face 32a is 4 ~ 25 μm, therefore, following polyurethane driving belt can be manufactured, its belt surface 3 as the surface of contact with belt wheel is for having the roughened surface of the trickle jog 6 that multiple length direction at belt surface 3 and width direction rise and fall repeatedly, and the arithmetic average roughness of this belt surface 3 is 4 ~ 25 μm.
< second mode of execution >
Below, the second mode of execution of the present invention is described.Wherein, for the parts with the formation identical with the first mode of execution, use identical label and suitably the description thereof will be omitted.
As shown in Figure 4, the toothed belt 201 of present embodiment has band main body 202, the many heart yearns 7 buried underground along strip length direction in band main body 202, is locally embedded in the reinforcement cloth 208 be with in main body 202.Identical with the first mode of execution, band main body 202 is made up of the polyurethane elastomer (polyurethane elastomer) being added with grease.In addition, on the belt surface 203 of band main body 202, the multiple teeth portion 204 engaged with the teeth portion of belt wheel are configured with predetermined interval along 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 multiple fine jog, and the grease transferring to belt surface 203 is accommodated in recess.
Strengthen cloth 208 to be configured in the transmission of power region (when the height from heart yearn position to the top of teeth portion 204 is set to H, the region within distance heart yearn position 2/3H) of tooth bottom surface between teeth portion 204 and teeth portion 204.Reinforcement cloth 208 with the mode curved configuration heaved to tooth top side, is strengthened transmission of power region in transmission of power region.It should be noted that, transmission of power region is the larger compressive stress that is subject to from belt wheel and bears the region of transmission of power.
Strengthening cloth 208 is with the short fibre such as polyethylene, polypropylene, polyamide, polyester, acrylic resin, glass of such as long 5 ~ 60mm for raw material, and the nonwovens be shaped by acupuncture etc., does not preferably carry out coagulation treatment.Therefore, strengthening the surface of cloth 208, short fibre fluffs.That is, the front end being fixed on the short fibre on the surface strengthening cloth 208 is left the surface of reinforcement cloth 208 and holds up.In addition, the part forming the short fibre strengthening cloth 208 is separated diffusion from reinforcement cloth 208.Thus, short fibre is random arrangement in transmission of power region, strengthens transmission of power region.
Then, the manufacture method of toothed belt 201 is described.
On the outer circumferential face 32a of internal mold 32, cloth 208 is strengthened in configuration, and is wound around heart yearn 7 thereon, then, is intercalated in external mold 31 by this internal mold 32.Then, make above-mentioned carrying material be full of space portion 33 between external mold 31 and internal mold 32, pour into a mould.It should be noted that, at this, aqueous carrying material can be poured into a mould, also can pour into a mould the carrying material after softening.Afterwards, heat with the scheduled time, predetermined temperature, after making carrying material crosslinking curing, carry out the demoulding, the band formed body obtained is cut into predetermined width, form multiple toothed belt 201.
Toothed belt 201 according to the present embodiment, utilizes and strengthens cloth 208 and from the short fibre strengthening cloth 208 separation, can strengthen the transmission of power region of teeth portion 204.Its result is, can prevent from, at the root of teeth portion 204, crack occurs.In addition, the effect identical with the first mode of execution can be obtained.
Above, based on accompanying drawing, embodiments of the present invention are illustrated, but, should think that concrete formation is not limited to these mode of executions and embodiment.Scope of the present invention is not only the explanation of above-mentioned mode of execution and embodiment, but comprise by the scope shown in claims and with the whole distortion in the implication of the scope equalization of claim and scope.
Embodiment
In order to confirm effect of the present invention, Test of Friction is carried out to the laminar sample of embodiment (embodiment 1 ~ 10) and comparative example (comparative example 1 ~ 5).In addition, when making these samples, investigation release property.
To smooth mould (100mm × 100mm × dark 2mm) the aqueous carrying material of middle cast being preheated to 100 DEG C, its crosslinking curing is made through predetermined time at the temperature of about 100 DEG C ~ about 120 DEG C, then the demoulding is carried out, make thin slice, this thin slice is cut into 20mm × 20mm, thus obtains sheet as sample.The thickness of sheet is 2mm.
As the aqueous carrying material of embodiment 1 ~ 5 and comparative example 3,5, use following liquid polyurethane raw material (temperature is adjusted to 60 DEG C): in polyethers carbamate prepolymer (Chemtura Inc. Adiprene-LF950A) 100 mass parts, coordinate as 3 of curing agent, 3 '-two chloro-4,4 '-diaminodiphenyl-methane 13 mass parts, lard 10 mass parts as grease and dioctyl phthalate 10 mass parts as plasticizing agent.
In addition, the aqueous carrying material of embodiment 6 ~ 10 uses butter hardened oil (Japan Oil Co's system, fusing point 54 DEG C, iodine number 23.5) to replace lard as grease, in addition, make it identical with the aqueous urethane raw of embodiment 1 ~ 5 and comparative example 3,5.
In addition, as the aqueous carrying material of comparative example 1,2,4, use and remove the material after lard (grease) 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, internal surface is used to become roughened surface by sand blast and have the mould of the arithmetic average roughness (Ra) shown in table 1.
In addition, in comparative example 3,4, as mould, internal surface is used not carry out sand blast and have the mould of the arithmetic average roughness (Ra) shown in table 1.
The arithmetic average roughness (Ra) on the sheet surface of each embodiment and each comparative example is roughly the same with the arithmetic average roughness of mould inner surface shown in table 1.Arithmetic average roughness (Ra) is for measuring based on JIS B0601-1994 " surface roughness-definition and expression " value obtained, and concrete determining method is identical with the method described in above-mentioned mode of execution.In addition, also show the presence or absence of the grease of each embodiment and each comparative example in table 1.
[table 1]
(release property)
Above-mentioned thin slice is evaluated from stripping easiness during mold releasability, its result is illustrated in table 1.Can easily be peeled off by thin slice and the average evaluation that do not extend is zero, average evaluation thin slice limit elongate edge peeled off is △.
(Test of Friction)
Test of Friction carries out based on JIS K7125 (1999) " plastic pellicle and thin slice test method of friction coefficient ".Sample (sheet, 1.4g) is arranged in the subject material (fixing) formed by material identical with this sample, after sample loads the plating hard chromium rounding cylindricality counterweight of diameter 38mm φ, quality 200g (normal force N), with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) started when sliding with load cell, calculate coefficientoffrictionμ (μ=F/N) by this frictional force F.This result is also 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 coefficientoffrictionμ are illustrated in the figure of Fig. 5.
The result represented from table 1, in the comparative example 5 that surperficial arithmetic average roughness (Ra) is larger than scope of the present invention, is deteriorated from the release property of mould.
In addition, as shown in table 1 and Fig. 5, the known interpolation grease that passes through can make friction factor be less than 0.32.In addition, in the comparative example 3 and 4 that the known arithmetic average roughness on surface (Ra) is less than the scope of the invention, friction factor has the tendency of increase.
In order to confirm effect of the present invention further, the toothed belt for following embodiment 11,12 carries out Test of Friction and vocalization test.
The toothed belt of embodiment 11,12 is have the band strengthening cloth equally with above-mentioned second mode of execution, makes in the following order by using the mould 30 as shown in Fig. 2 and Fig. 3 (a) ~ (b).
Install at the outer circumferential face 32a of internal mold 32 and strengthen cloth, be wound around after heart yearn thereon, this internal mold 32 is inserted among external mold 31, afterwards, make aqueous carrying material be full of space portion 33 between internal mold 32 and external mold 31, and make it solidify.Then, the canular band formed body obtained is cut into width 15mm, using the toothed belt obtained (being with size S8M560) as sample.
As the reinforcement cloth of embodiment 11,12, use and be shaped by acupuncture and the nonwovens of tubular that 6.6 nylon fibers that do not carry out coagulation treatment are formed.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 (East レ Co., Ltd. system, production code member " T700GC6K31E ", fiber number 4300 Denier that are made up of carbon fiber).
In addition, as the heart yearn of embodiment 12, use the twisted filament (Teijin Ltd's system, trade name " テ Network ノ mono-ラ ") of aramid fibre.The aqueous carrying material of embodiment 11,12 uses the material identical with above-described embodiment 6 ~ 10.
In addition, as the mould of embodiment 11,12, the outer circumferential face 32a of internal mold 32 is used to form roughened surface by sand blast and have the mould of the arithmetic average roughness (Ra) shown in table 2.
The arithmetic average roughness (Ra) on the teeth portion surface of the toothed belt (sample) obtained is roughly the same with the arithmetic average roughness of the outer circumferential face of the internal mold shown in table 2.
[table 2]
(Test of Friction)
Test of Friction carries out after running test carries out 72 hours.Running test is, sample (toothed belt) is set up between driving pulley (number of teeth: 24 teeth) and driven pulley (number of teeth: 24 teeth), and predetermined tension force is applied to band, by DC motor, driving pulley is rotated with rotating speed 3600rpm, connection to load follower 25.0Nm.
Test of Friction is, sample (toothed belt, 1.6g) after above-mentioned running test is arranged at and is made up of material identical with this sample and has on the belt body (fixing) in three groove portions, the teeth portion of each band and groove portion is made to be chimeric state, after sample loads the plating hard chromium rounding cylindricality counterweight of diameter 38mm φ, quality 200g (normal force N), with speed 10mm/ minute tractive sample.Then, measure the load (frictional force F) started when sliding with load cell, calculate coefficientoffrictionμ (μ=F/N) by this frictional force F.This result is also illustrated in table 2.
(vocalization test)
Vocalization test is, sample (toothed belt) is set up between driving pulley (number of teeth: 24 teeth) and driven pulley (number of teeth: 24 teeth), and predetermined tension force is applied to band, by DC motor, driving pulley is rotated with rotating speed 1200rpm, connection to load follower 25.0Nm.Then, band advancing side two belt wheels immediate vicinity and leave band 20mm position configuration MIC microphone, measure sounding.This result is also illustrated in table 2.
As shown in Table 2, as the material of heart yearn, compared with the situation employing aramid fibre, when using carbon fiber, can friction factor be reduced, and can sounding be suppressed.
Although in detail also describe the present invention with reference to embodiment, making various modifications and variations wherein without departing from the spirit and scope of the present invention, is apparent for those skilled in the art.
The present invention is the Japanese patent application 2011-180454 that the Japanese patent application 2011-065645 and 2011 submitted to based on the Japanese patent application 2010-263557 submitted on November 26th, 2010, on March 24th, 2011 submits to 22, on Augusts, and its content is incorporated herein by reference herein.
Claims (9)
1. a polyurethane driving belt, has the band main body be made up of the polyurethane elastomer that with the addition of oiling agent, is set up between multiple belt wheel, it is characterized in that,
The belt surface as the surface of contact with described belt wheel of described band main body, for having the roughened surface of the fine jog that multiple length direction at this belt surface and width direction rise and fall repeatedly, the arithmetic average roughness of this belt surface is 4 ~ 25 μm, and described jog is formed by polyurethane elastomer.
2. polyurethane driving belt as claimed in claim 1, wherein, at the recess of the described jog that described belt surface has, contains the described oiling agent transferring to described belt surface.
3. polyurethane driving belt as claimed in claim 1 or 2, wherein, described oiling agent is grease.
4. polyurethane driving belt as claimed in claim 3, wherein, the mean molecule quantity of described grease is the scope of more than 500 and less than 2000.
5. polyurethane driving belt as claimed in claim 3, wherein, described grease is lard.
6. polyurethane driving belt as claimed in claim 4, wherein, described grease is lard.
7. polyurethane driving belt as claimed in claim 3, wherein, described grease is have more than 50 DEG C and the hardened oil of the fusing point of less than 80 DEG C.
8. a manufacture method for polyurethane driving belt, for the manufacture of having the band main body be made up of the polyurethane elastomer that with the addition of oiling agent and the polyurethane line belt be set up between multiple belt wheel, is characterized in that, comprise:
First operation, coordinates oiling agent and curing agent to prepare carrying material in carbamate prepolymer;
Second operation, described carrying material is poured in mould, described mould has internal mold and external mold, and the outer circumferential face of this internal mold is the roughened surface with the fine jog that multiple length direction at this outer circumferential face and width direction rise and fall repeatedly, and the arithmetic average roughness of this outer circumferential face is 4 ~ 25 μm;
3rd operation, makes described carrying material solidify, and the shape transfer of the described jog of the outer circumferential face of described internal mold is carried out the demoulding after belt surface.
9. the manufacture method of polyurethane driving belt as claimed in claim 8, wherein, described oiling agent is grease.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010263557 | 2010-11-26 | ||
| JP2010-263557 | 2010-11-26 | ||
| JP2011065645 | 2011-03-24 | ||
| JP2011-065645 | 2011-03-24 | ||
| JP2011180454 | 2011-08-22 | ||
| JP2011-180454 | 2011-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537208A CN102537208A (en) | 2012-07-04 |
| CN102537208B true 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) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015146033A1 (en) * | 2014-03-24 | 2015-10-01 | 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 |
| JP6324336B2 (en) * | 2014-03-31 | 2018-05-16 | 三ツ星ベルト株式会社 | Toothed belt |
| EP3187749B1 (en) * | 2014-09-24 | 2019-03-20 | Bando Chemical Industries, Ltd. | 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 |
| CA2980521A1 (en) | 2015-03-31 | 2016-10-06 | Fisher & Paykel Healthcare Limited | A user interface and system for supplying gases to an airway |
| CN104963998B (en) * | 2015-06-26 | 2017-10-10 | 广东元星工业新材料有限公司 | Integral type polyurethane synchronous belt and preparation method thereof |
| JP6686399B2 (en) * | 2015-12-04 | 2020-04-22 | ブラザー工業株式会社 | Fixing device and method of manufacturing fixing device |
| AU2017309412B2 (en) | 2016-08-11 | 2022-08-25 | Fisher & Paykel Healthcare Limited | A collapsible conduit, patient interface and headgear connector |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6415553A (en) * | 1987-07-10 | 1989-01-19 | Aisin Seiki | Driving belt |
| JP4132190B2 (en) * | 1997-10-30 | 2008-08-13 | 三ツ星ベルト株式会社 | Polyurethane belt |
| JP2002130381A (en) * | 2000-10-20 | 2002-05-09 | Mitsuboshi Belting Ltd | Round belt |
| JP2007099986A (en) * | 2005-10-06 | 2007-04-19 | Kaneka Corp | Acrylic block copolymer composition |
| JP2008144965A (en) * | 2006-11-14 | 2008-06-26 | Mitsuboshi Belting Ltd | Polyurethane toothed belt and its manufacturing method |
-
2011
- 2011-11-17 JP JP2011251266A patent/JP5846869B2/en active Active
- 2011-11-25 CN CN201110382108.8A patent/CN102537208B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5846869B2 (en) | 2016-01-20 |
| CN102537208A (en) | 2012-07-04 |
| JP2013061062A (en) | 2013-04-04 |
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