CN1769036B - Method for making a power transmission belt/belt sleeve and a power transmission belt - Google Patents
Method for making a power transmission belt/belt sleeve and a power transmission belt Download PDFInfo
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- CN1769036B CN1769036B CN 200510116011 CN200510116011A CN1769036B CN 1769036 B CN1769036 B CN 1769036B CN 200510116011 CN200510116011 CN 200510116011 CN 200510116011 A CN200510116011 A CN 200510116011A CN 1769036 B CN1769036 B CN 1769036B
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- belt sleeve
- preform
- sleeve preform
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Abstract
A method of making a power transmission belt/belt sleeve by bias cutting sides thereof using a cutter. A belt/belt sleeve preform is trained around at least two spaced shafts and driven as the sides are reconfigured by the cutter. The cutter may reside within a cutting space bounded by an inner circumference of the traveling belt/belt sleeve preform. The belt/belt sleeve preform has a starting shape wherein spaced sides thereof are parallel to each other. Parts of the sides may be maintained parallel after the bias cutting is performed. A power transmission belt with bias cut side surfaces isalso contemplated.
Description
Technical field
The present invention relates to a kind of power transmission belt, more particularly, relate to a kind of power transmission belt with the side surface of cutting sth. askew.The present invention also asks for protection a kind of method and apparatus and is used for manufacturing/formation power transmission belt or belt sleeve, has the side surface of cutting sth. askew comprising those.
Background technology
It is very common that the belt sleeve that is made of rubber and other building blocks by initial formation is made V-belt.Each belt that has the trapezoid cross section with manufacturing is cut in the sulfuration of belt sleeve subsequently.This common manufacturing process usually causes the variation of structure, comprises performance and its operation of belt.The length of belt and cross sectional shape can change along with the material thermal contraction that limits belt.Load cord between elongated portion and the constriction can be less than the optimum position.The other defect that occurs in the process for machining can make that also the belt end product quality is not ideal enough.
In these problems, what especially be concerned about is the change of sectional dimension and shape.This situation can make that the position of belt upwards produces fluctuation in the footpath with respect to pulley spindle in the pulley groove that matches.This fluctuation meeting causes vibration in running.This situation also can make belt tension fluctuation, this fluctuation can cause the pulley of belt institute draw and relevant device to produce vibration.
In order to address the above problem, knownly will carry out sanded treatment from the independent V-belt that sleeve downcuts.The exemplary configurations and the method that realize this processing are disclosed in the patent gazette of Japan Patent No.3553371.Belt under the cutting is driven around a pair of pulley and on the cycle operation path by draw.When belt turns round, be in the dimensional tolerance range thereby the side is polished.
The advantage in polishing side is that large-area artificial reinforcement short fiber exposes at the belt side surface.Finally, reduced the coefficient of friction between side surface and the cooperation pulley, thereby made the noise that produces, the noise when particularly starting remains on the acceptable reduced levels substantially.On the other hand, owing to reduced coefficient of friction, belt can produce slip, thereby produces unnecessary wearing and tearing and heat.
In another technology, sulfuration sleeve inboard can be routed up and is placed on the axle.During live spindle, can v-depression be cut into sleeve, use cutter to cut apart single belt thereafter with grinding stone.In U.S. Patent No. 3,818, narrated the exemplary configurations and the method for the belt that is shaped in this way in 576.
In the patent gazette of JP-B-4-2425, also show another kind of equipment and the method that forms belt.Wherein disclosed a kind of equipment comprises drive pulley and follow-up pulley, and the belt preform is around being followed the endless path motion by draw thereon.Follow-up pulley can move along guide post.Use a pair of rotating blade to be used for structure/formation belt side.Provide the promotion cylinder with the back-up belt back side at cutting position, thus when blade is pressed to belt reinforcing belt.When belt is driven and the blade rotation time is cut.
By such equipment, rotating blade so arranges relative to each other, makes the both sides of belt insert between the rotating blade and carries out simultaneously operating.Finally, cutter needs a large amount of relatively assemblies, comprises blade, to realize required cooperation campaign between belt and the cutter.Usually, along with the increase of equipment complexity and size, its weight and manufacturing cost also can correspondingly increase.
In the patent gazette of JP-A-55-28883, show a kind of equipment and method, the cutting of wherein carrying out the belt sleeve makes the form of finishing of adjacent belt be consistent in the side.Finally, the quantity of material that be removed and must handle or dispose reduces to some extent with respect to having system at interval between the adjacent belt.
The side of adjacent belt is consistent, and can save a certain amount of material.Yet, still have a large amount of waste materials to produce.Therefore, what waste material produced relatively minimizes, and also has the space of improving.
Consider that the method for narrating previously produces considerable waste material or clout, the method for back is better in this regard.For example, blade can remove the waste material of many annulars at each side surface.And in said method, the waste material that produces by grinding, scraping or polishing is a lot of equally.Usually, for economical with materials and time and the inconvenience when avoiding handling waste material, very wish to reduce the amount of the waste material that produces in the belt forming technology.
The designer of this type equipment also has a purpose to be, provides a kind of compactness and structure that cost is low, and can produce high-quality power transmission belt.Another purpose of this system designer is that the mode that these technologies can high timeliness is carried out.
Summary of the invention
In one form, the present invention relates to a kind of method of making power transmission belt or belt sleeve.The method comprising the steps of: endless-belt or belt sleeve preform are provided, it has inboard, the outside and interval side, and comprises at least one load cell that shrinks between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside; Draw belt or belt sleeve preform are at least the first and second, and first and second have first and second axis; Thereby driving at least one axle makes belt or belt sleeve preform move at circulating path; Provide the promotion assembly in the inboard of belt or belt sleeve preform and at least one the primary importance in the outside; Provide at least one side of at least one director element back-up belt or belt sleeve preform, with moving of restriction belt or belt sleeve preform; Cutter is provided; The guiding cutter is shifted to belt or belt sleeve preform in primary importance or contiguous position from the inboard of belt or belt sleeve preform and the outside another, the supported assembly of a side in belt or the belt sleeve preform inboard and the outside supports like this, therefore re-constructs out belt or belt sleeve preform.
In one form, first has small diameter portion between isolated large-diameter portion is divided, and the step of draw belt or belt sleeve preform comprises belt or belt sleeve preform are placed between isolated large-diameter portion divides.
The step of draw belt or belt sleeve preform comprises that elongation rubber layer and at least a portion are shunk rubber layer to be placed between isolated large-diameter portion divides.
In one form, first and second axis are substantially parallel, and the step of guiding cutter comprises and makes cutter with respect to obliquely cutting the contraction rubber layer with the reference planes of the first and second axis quadratures.
In one form, provide the step of endless-belt or belt sleeve preform to comprise endless-belt or belt sleeve preform are provided, it is arranged essentially parallel to reference planes in side at interval.
The belt that provides the step of endless-belt or belt sleeve preform to comprise to be provided or the width of belt sleeve preform nominal at least equal the desired width of final power transmission belt.
Provide the step that promotes assembly to comprise the promotion roller is provided.
Provide the step of at least one director element that at least one guide roller that provides on endless-belt or each spaced apart side of belt sleeve preform can be provided.
Providing the step that promotes assembly can be included in ad-hoc location provides the promotion assembly to make when cutter is directed shifting to belt or belt sleeve preform, promotes assembly and can not contact cutter.
This method also comprises the interval between first last large-diameter portion branch of change, to hold the width of belt or belt sleeve preform.
In one form, load cell has the inboard and the outside, and the step that belt or belt sleeve preform are provided comprises belt or the belt sleeve preform with elongated portion and constriction is provided, elongated portion limits the outside of belt or belt sleeve preform, and constriction limits the inboard of belt or belt sleeve preform.Be decided to be L from the belt or the belt sleeve preform outside to the distance the load cell outside.With respect to the oblique cutting belt in five equilibrium plane of belt between the side, interval or belt sleeve preform or the side, interval of belt sleeve preform, from the boundary position to the belt or the inboard of belt sleeve preform, the 90-100% of L spaced apart between this boundary position and belt or the belt sleeve preform outside.
The step of guiding cutter can comprise and makes cutter be partitioned into belt or belt sleeve preform annular section, in case cut apart, just surrounds in the major diameter part that first between centers separates, and rotatablely moves thereby following first.
Provide the step of endless-belt or belt sleeve preform that the short fiber that provides length to extend between belt or belt sleeve preform side can be provided, can expose the side at interval in the oblique cutting of shrinking rubber layer.
In one form, each of side, oblique cutting interval all has an area, and provides the step of short fiber to comprise that the amount of the short fiber that is provided makes the short fiber bonded area that exposes in each side, interval equal each 20-70% of the oblique cutting area in side at interval.
Provide the step of belt or belt sleeve preform can comprise that the belt or the belt sleeve preform that provide have certain-length and have tooth on the regular spaces of belt or belt sleeve preform length.
The step of draw belt or belt sleeve preform can comprise that draw belt or belt sleeve preform are to limit the interior week that defines cutting gap in it.The step of guiding cutter comprises that (a) moves cutter re-constructing at interval one of them in the side of belt or belt sleeve preform along a direction in cutting gap, and (b) along substantially with this side in the opposite direction in cutting gap mobile cutter to re-construct in the side, belt or belt sleeve preform interval another.
Provide the step of cutter comprise the cutter that provides have can be fixed relative to one another first and second blades, to construct belt or belt sleeve preform one in the side and another at interval respectively.
In one form, provide the step of cutter can comprise that the cutter that provides has first and second desk blades, each all has axis, wherein the axis of radially overlapping and first and second blades of first and second blades and inconsistent.
This method also can comprise the step that changes cutter from first state, rotates first desk blade around its pivot, and the state with cutter becomes first state again thereafter, thereby fixes the position of first desk blade.
Provide the step that promotes assembly can comprise that the promotion assembly that provides strengthens belt or belt sleeve preform when cutter is shifted to a direction.This method also can comprise provides second to promote the step of assembly, thereby strengthens belt or belt sleeve preform when cutter is shifted to that direction rightabout.
In another form, the present invention relates to a kind of method of making power transmission belt or belt sleeve.The method comprising the steps of: endless-belt or belt sleeve preform are provided, it has inboard, the outside and interval side, and comprise at least one load cell that shrinks between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside and have the inboard and the outside, wherein be decided to be L to the distance the load cell outside from the belt or the belt sleeve preform outside; With respect to belt or the belt sleeve preform oblique cutting in the five equilibrium plane between side side at interval at interval, from belt or belt sleeve preform outside lateral extent be the boundary position of the 90-100% of L, arrive the inboard of belt or belt sleeve preform.
Provide the step of belt or belt sleeve preform to comprise belt or the belt sleeve preform with side, interval parallel to each other basically is provided.
This method can comprise draw belt or the belt sleeve preform step around first and second spacing shafts.In one form, oblique step of cutting is included in belt or this side, interval of the oblique cutting in the position of belt sleeve preform under the tension force effect between first and second.
Thereby also being included in primary importance, this method provide the promotion assembly when carrying out oblique cutting, to strengthen belt or belt sleeve.
The step of draw belt or belt sleeve preform can comprise that draw belt or belt sleeve preform are to limit the interior week that defines cutting gap in it.Oblique step of cutting can comprise uses cutter to carry out oblique cutting.(a) arranged the step that this method also can comprise thereby moving cutter along a direction in cutting gap re-constructs belt or belt sleeve preform one in the side at interval, thereby and (b) go up mobile cutter in the opposite direction with this side substantially in cutting gap and re-construct belt or belt sleeve preform another in the side at interval.
The invention still further relates to a kind of equipment that is used to form power transmission belt or belt sleeve.This equipment has first and second, and endless-belt or belt sleeve preform can be around its draws.In first and second at least one can be driven, thereby makes the path that moves into circular flow around the first and second axial belts or belt sleeve preform.First has small diameter portion between large-diameter portion is at interval divided, thereby makes and reside between large-diameter portion divides around the first and second axial belts or belt sleeve preform.Provide the promotion assembly at cutting position.Also provide at least one director element at cutting position.The cutter that provides is supporting and is forming the part around the belt of first and second operations or belt sleeve preform.Promoting assembly is used for strengthening belt or the belt sleeve preform on first and second and is supported on the cutter.The side around the belt of first and second operations or belt sleeve preform is being supported at least one director element position, thus restriction belt or belt sleeve preform moving at cutting position.
This equipment also can combine with endless-belt or the belt sleeve preform around first and second draws, this belt or belt sleeve preform have inboard, the outside and interval side, and comprise at least one load cell that shrinks between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside.
The side, interval of belt or belt sleeve preform can be parallel to each other basically before being shaped by cutter.
Belt between first and second or belt sleeve preform can be in tensioning state.
In one form, at least one director element comprises first and second cylinders, and each self-supporting the side of belt or belt sleeve preform.
Promoting assembly can be to promote cylinder.
In one form, cutter can move relative to belt or belt sleeve preform, thus oblique cutting belt or belt sleeve preform one in the side at interval.
Shrinking rubber layer can reside between first dividing than large-diameter portion.
In one form, the relative position of promotion assembly and cutter makes that cutter can not touch the promotion assembly when equipment is worked.
In one form, can select to shift to than of major diameter part and away from another than the major diameter part.
The side of belt or belt sleeve preform can remain between the large-diameter portion branch.
In one form, be decided to be L from the belt or the belt sleeve preform outside to the distance the load cell outside.With respect to the oblique cutting belt in five equilibrium plane between belt or the side, belt sleeve preform interval or the side, interval of belt sleeve preform, from with belt or belt sleeve preform outside lateral extent be the boundary position of the 90-100% of L, to the inboard of belt or belt sleeve preform.
In one form, along with oblique cutting belt or belt sleeve preform, the annular section of belt or belt sleeve preform is separated and surround in the major diameter part that first between centers separates one, thereby rotatablely moves along with first.
In one form, belt or belt sleeve preform lead around first and second, belt or belt sleeve preform limit interior week of defining cutting gap in it and (a) can move cutter re-constructing belt or belt sleeve preform one in the side at interval along a direction in cutting gap, thereby and (b) re-construct belt or belt sleeve preform another in the side at interval along direction mobile cutter in cutting gap opposite substantially with this direction.
The invention still further relates to a kind of equipment that is used to form power transmission belt or belt sleeve, this equipment has first and second, and endless-belt or belt sleeve preform can lead around it.In first and second at least one can be driven, thereby making to lead around the first and second axial belts or belt sleeve preform moves in the path of circular flow.Provide the promotion assembly at cutting position.Provide cutter and can cutting position (a) a direction move cutter with re-construct lead around first and second on belt or belt sleeve preform two one in the side at interval, and (b) along substantially with this side mobile in the opposite direction cutter with in the side, two intervals that re-constructs the belt that leads on first and second or belt sleeve preform another.
This equipment can combine with leading around the first and second axial endless-belts or belt sleeve preform, wherein belt or belt sleeve preform have inboard, the outside and interval side, and comprise at least one load cell that shrinks between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside.
In one form, belt or belt sleeve preform limit defines the cutting gap of wherein placing cutter interior week.
The side, interval of belt or belt sleeve preform can be parallel to each other basically before being shaped by cutter.
In one form, cutter have can be fixed relative to one another first and second blades, described blade is so arranged and is made one of them blade re-construct out in belt or the side, belt sleeve preform interval, and another blade re-constructs out in belt or the side, belt sleeve preform interval another.
In one form, cutter comprises first and second desk blades, all has axis separately.Blade is radially overlapping, and the axis of first and second blades and inconsistent.
In one form, first blade can select to be fixed on the position of different angles around first axle.
Promote assembly and can when a direction moves, strengthen belt or belt sleeve preform at cutter.This equipment can also comprise that second promotes assembly, thereby strengthens belt or belt sleeve preform when cutter is shifted to that direction rightabout.
In one form, blade is with respect to the oblique cutting belt of five equilibrium reference planes between belt or the side, belt sleeve preform interval or the side, interval of belt sleeve preform.
In one form, belt between first and second or belt sleeve preform can be in tensioning state.
In one form, cutter comprises first and second blades, and described blade is supported on the arm that protrudes in the cutting gap.
In one form, arm is elongated, and its length is along being arranged essentially parallel to the movably direction extension of first axis that is centered on.
Arm can be chosen in to be parallel to and to be orthogonal on the length direction of arm and move.
The invention still further relates to a kind of power transmission belt, its main body has inboard, the outside and interval side, and comprises at least one load cell that shrinks between rubber layer, elongation rubber layer and the main body inboard and the outside.Load cell has the inboard and the outside.Distance from the external side of main body to the load cell between the outside is decided to be L.With respect to the side, interval of the oblique cutting main body in five equilibrium plane between the main body side, from the boundary position of the 90-100% of main body outside distance L, to the inboard of main body.
In one form, has the short fiber that length is extended in the main body between the main body side.
Short fiber may reside in and shrinks in the rubber layer.
When main body during by oblique cutting, fiber can expose on the main body side surface.
In one form, main body is had an area by each of the main body side of oblique cutting, and the area that short fiber exposes in each side of main body equals by the 20-70% of the main body lateralarea of oblique cutting.
Short fiber can flush with the main body side.
In one form, main body has certain-length and have tooth on the regular spaces of principal length.
This power transmission belt can be (a) vee-belt, (b) V-arrangement ribbing belt and (c) a kind of in the flat belt.
Description of drawings
Fig. 1 is the schematic diagram of the power transmission belt that can be constructed in accordance goes out;
Fig. 2 is the fragment perspective of a kind of form of the power transmission belt that goes out constructed in accordance;
Fig. 3 is the zoomed-in view of the power transmission belt lateral parts in Fig. 2 circle;
Fig. 4 is the part side view that forms the mould of belt or belt sleeve preform assembly thereon;
Fig. 5 is the perspective view that is used to form the tooth pad of belt or belt sleeve preform;
Fig. 6 be a part that has the mould of reinforcement fabric ply amplify, partly, front view, wherein reinforcement fabric ply is placed on the mould by gear pulley;
Fig. 7 is the side view of mould, has wherein formed the contraction rubber layer around mould, prepares to handle under the temperature and pressure condition of control;
Fig. 8 is the processed view afterwards of the contraction rubber layer of Fig. 7;
Fig. 9 be around around the part side view of the mould of belt or belt sleeve cartridge module, belt or belt sleeve cartridge module are used to make belt shown in Figure 1;
Figure 10 is the cross sectional view that is used for the right angle belt preform of structural map 2 belts;
Figure 11 is the diagrammatic elevation view according to a kind of form of belt former of the present invention;
Figure 12 is identical with Figure 11, is the view from state half-twist shown in Figure 11;
Figure 13 is identical with Figure 11, and wherein belt or the belt sleeve preform waste material that is cut and removes in cutting process is kept perfectly;
Figure 14 is the cross sectional view of the belt former of 14-14 line in Figure 13;
Figure 15 is the cross sectional view of the belt former of 15-15 line in Figure 13;
Figure 16 is amplification, segment, the perspective view of axle on the belt former of the present invention, leads around belt or belt sleeve preform on the axle, and waste material is from wherein being cut and round this axle;
Figure 17 is the perspective view of the improved form of belt former according to the present invention;
Figure 18 is the cross sectional view of the part of the belt former of 18-18 line in Figure 17;
Figure 19 be in Figure 17 and 18 cutter on the equipment with and prolong amplification, segment, the perspective view of support arm.
The specific embodiment
In fact the present invention can be used for the power transmission belt of any kind, as 8 overall expressions among Fig. 1, the pulley engagement side surface 10,11 with each interval.
A special demonstration form of power transmission belt constructed in accordance is shown in Fig. 2 and 3 12.Power transmission belt 12 is commonly referred to burr toothed belt, is used as speed belt, for example snowmoblie, motor scooter and common industrial machinery on the different equipment of being everlasting.The main body 14 of belt 12 has inboard 16, the outside 18 and opposite and isolated side 20,22.
Main body 14 comprises shrinks rubber layer 24, elongation rubber layer 26, and at the yielding rubber layer 28 that shrinks and extend between the rubber layer 24,26.Load cell/cord 30 that spiral twines limits the neutral axis of belt, and its outside has formed elongated portion 32, and its inboard has formed constriction 34.Load cord 30 can be made and embed in the yielding rubber layer 28 by fiber.On the outside 38 of elongation rubber layer 26, provide reinforcement fabric ply 36.On the inboard 42 of shrinking rubber layer 24, provide similar reinforcement fabric ply 40.
Main body 14 has length of the cycle, and is represented with double-headed arrow LL.Length along main body 14 is being arranged tooth 44 with constant spacing.
Side surface portion the 46, the 48th, right angle cuts in elongated portion 32 promptly is flat and parallel to each other basically.With respect to the reference planes P of five equilibrium main body 14 between the side 20,22 of main body, side surface portion 50,52 is oblique cutting.Right angle cuts side surface portion 46,48 is substantially perpendicular to the outer surface 54 of the main body 14 that is limited by reinforcement fabric ply 36.
Among Fig. 1, the distance of size " L " representative from main body 14 outer surfaces 54 to load cord 30 outsides 56.The vertical dimension of oblique cutting side surface portion 50,52 is represented by size L1.Transition between right angle cuts side surface portion 46,48 and the oblique cutting side surface portion 50,52 is created in boundary member BL.The vertical dimension of right angle cuts side surface portion 46,48 is represented by L3.According to the present invention, size L3 equals the 90-100% of distance/size L.
In this embodiment, the relative respectively vertical direction in side 20,22 becomes the θ angle.Preferably 20-60 ° at θ angle.Such belt is called wide cuticle band.
In the embodiment shown in Fig. 2 and 3, boundary position BL coincides with the outside of load cord 30.In other words, L3 equals L, perhaps in other words, at the crossover position between side surface portion 46,48 and 50,52 to the distance L that is spaced apart between the outer surface 54.When belt 12 was this shape, the center line of load cord 30 will contact with the pulley 57 of cooperating all the time.Therefore, the power transfer efficiency of belt 12 can keep higher level.Simultaneously, make the waste material amount that belt 12 produced and to remain on relatively low level.
Make the interval of boundary line BL and outer surface 54 less than 90% of L like this if boundary position BL moves up from the outside 56 of load cord 30, can the power transfer efficiency of belt 12 not thrown into question usually.Yet this situation is unsatisfactory, because can produce a large amount of waste cut materials in the process that belt is shaped.
If boundary position BL moves, make boundary position BL to the interval of outer surface 54 greater than 100% of L, load cord 30 can leave the side of cooperation pulley 57, makes that finally the power transfer efficiency of belt 12 is impaired.Also can produce beating of belt.In addition, the waste cut materials that produces in belt 12 forming processes also can be very thin, and in the belt running, waste cut materials is easy to disconnect loose in the belt forming process.
As be shown in figures 2 and 3, short, segment reinforcing fibre 58 embeds and shrinks in the rubber layers 24 the common horizontal expansion of its length.It is concordant that the end surface 60 of 20,22 fibers that expose 58 is preferably in side 20,22 cuttings in the side.Finally, the bonded area of the fiber surface 60 that exposes can be controlled with respect to the overall surface area of the side 20,22 that fiber 58 wherein is provided, thereby improves the coefficient of friction between side 20,22 and the cooperation pulley 57 according to demand.Finally, wearing and tearing and the belt that can control initial start slides and the heat of generation.Can produce the belt of high durability with this structure.
The gross area of the fiber surface 60 that preferably, exposes is between the 20-70% of oblique cutting side surface portion 50,52 whole areas.If this ratio is lower than 20%, the coefficient of friction between side 20,22 and the cooperation pulley 57 will increase, and its result can produce noise because of adhesion wear.In addition, because the accumulation area on exposed fiber surface 60 is less relatively, the humidification of fiber 58 can be insufficient.
On the other hand, if ratio surpasses 70%, belt 12 will have the trend that relative pulley 57 slides, and this can cause wearing and tearing and produce frictional heat.
The present invention wishes that any load cell can be used between elongation and the compression section 32,34.In this embodiment, shown load cord 30 can be made by polyester fiber, aromatic polyamides and/or glass fibre.It is desirable to, cord is that total Denier (Denier unit of silk, artificial silk, fiber) is 4,000-8, and 000 polyester fiber filament group, main component is an ethene-2,6-naphthalate is twined together and carries out adhesion process.Therefore can control the ratio that belt slides.In addition, belt life can remain on proper level.In a specific embodiment, the whole sth. made by twisting amount of cord 30 is 10-23/10cm, and the first twist amount is 17-38/10cm.
If total Denier is lower than 4,000, the modulus of load cord 30 can become too low.If total Denier surpasses 8,000, it is too thick that belt 12 can become, and finally damages bending property and make belt 12 be easy to produce flexural fatigue.
The rubber of elongation and constriction 32,34 can be identical or different.The rubber that is fit to is: natural rubber, butyl rubber, styrene-butadiene are as the mixed polymer of glue, chloroprene rubber, butylene-acrylic rubber, hydrocarbonylation chlorine sulphur polyethylene, hydrogenated nitrile rubber, hydrogenated nitrile rubber and unsaturation carboxylic acid slaine.Mentioned component can use separately or be used in combination arbitrarily.
Fiber 58 can be an aramid fibre, Fypro, polyester fiber, cotton etc.The preferred length of fiber 58 depends on fibre composition.Usually, preferred length is 1-10mm.For example, if use aramid fibre, preferred length is 3-5mm.If Fypro, polyester fiber and cotton, preferred length is 5-10mm.
Indicate as top, the length of fiber 58 is orientated from a side usually to opposite side.Suppose directly be 90 ° of angles from the side to the side, preferably the length direction of fiber 58 is fixed within 70 °-110 ° the scope.
Preferably, elongation rubber layer 26 does not comprise any reinforcing fibre 58.Reinforcing fibre 58 can be provided in the yielding rubber layer 28, yet, be that any fiber wherein is not provided better.
Tissue layer 36,40 can be made by cotton, polyester fiber, nylon or analog, uses plain weave, twill weave or satin weave.Tissue layer 36,40 can be a wide angle canvas, and the intersecting angle of graticule is within 90-120 ° scope.Tissue layer 36,40 can be carried out the RFL processing, and fabric is covered with wear-resistant coating rubber thereafter.In one embodiment, the production method of RFL solution is that the initial condensation thing of resorcinol and formaldehyde mixes mutually with latex.The latex that is fit to comprises: chlorobutadiene, styrene-butadiene-vinylpyridine terpolymer, hydrogenated nitrile rubber and NBR (NBR).
A concrete grammar of formation belt 12 as shown in Figure 4.Among Fig. 4, main body 14 is limited by the contraction rubber layer of making continuously on mould 62 24, load cord 30 and elongation rubber layer 26 and forms.Have on the peripheral surface 64 of mould 62 around surface 64 projection that replaces and grooves 66,68 with the fixed intervals setting.
Another mould structure as shown in Fig. 4 can use the mould that has inner master mold, wherein alternately forms corresponding projection and groove with fixing spacing in a circumferential direction.
Also have another kind of mode, as shown in Figure 5, can form belt 12 with the tooth pad 70 that is shaped in advance.The manufacturing of tooth pad 70 is as described below.In a specific embodiment, one or more layers reinforcement fabric, one will become the half finished rubber layer that part is shunk rubber layer 24, and, the half finished rubber layer that will become yielding rubber layer 28, mutually stacked and be placed on the smooth metal die (not shown), processed projection and the groove of wanting alternating pattern on the mould in advance.These assemblies are pressurized subsequently, and final pattern tool forms tooth 44 and the groove between adjacent teeth 44 74.
One end 76 of tooth pad 70 is preferably 0-40 ° at the oblique cutting angulation α of tooth top 78 places.Tooth pad 70 upset, the other end 80 at 82 places, top at interval in the same way to the oblique cutting of opposite incline direction.By this layout, end 76,80 can closely contact and butt joint mutually each other, thereby produces the looping construct of tooth pad 70.
The mould 62 of Fig. 4 can be connected in (not shown) on the forming machine subsequently.Tooth pad 70 in turn with peripheral surface 64 engagements of mould 62, thereby make projection 66 and groove 68 complementary fit on tooth 44 and groove 74 and the mould 62.The length of control tooth pad 70 makes tooth pad 70 winding mold tools 62 extend continuously, its medial end portions 76,80 butt joints.In case tooth pad 70 is put the position well, twine load cord 30 with regard to spirality.After this, the reinforcement fabric from one deck to the multilayer, and the half finished rubber layer that will become elongation rubber layer 26 all are wrapped on the load cord 30.By this process, constructed the preform assembly of belt or belt sleeve.
In case step is finished, this assembly is centered on by overcoat, puts into the sulfuration container and uses conventional process to vulcanize.After sulfuration is finished, separate on overcoat and belt or the belt sleeve preform mould 62.
Make the other method of belt or belt sleeve preform, reinforcement fabric/canvas 40 can lean on as mill pinion and be connected in the groove 68 of mould 62, as next described.Rubber layer twines thereon and its end face docks to form loop-body.This rubber layer subsequently from periphery be heated the pressurization and with the engagement mode tentatively be assembled on the peripheral surface 64 of mould 62, as mentioned above.On the exposing surface that covers the rubber layer on the mould 62, finish belt or belt sleeve preform thereby twine load cord and independent rubber layer successively.
Among said here all embodiment, the width of initial preform can equal the width of single belt or also can make width enough therefrom be cut into several belts.For simple purpose, in here the specification and claims, this preform will be generically and collectively referred to as " belt or belt sleeve " preform, be to be understood that this term comprises the sleeve of any different in width, can be single belt or a plurality of belt.After this this belt or belt sleeve will be represented and corresponding preform reference numerals " 12 ' " with reference numerals " 12 ".
The reinforcement fabric ply 40 that uses on mould 84 above-mentioned will describe in detail with reference to figure 6.,, cover on the projection 86 and groove 88 on mould 84 peripheral surfaces 90 rubber adhesive 85 with sprinkler, brush or cylinder as viscose glue.In this embodiment, the cylinder master mold is connected on the metal die.Subsequently reinforcement fabric ply 40 is added on the peripheral surface 90, reinforcement fabric ply 40 can be process or not have through adhesion process.After this, gear pulley 92 radially moves inward, on it in a series of teeth 94 one with mould 84 upper grooves 88 in an engagement.Mould 84 is around the direction rotation of its axis 96 along arrow 98 subsequently.Reinforcement fabric ply 40 is shown A at high spot, is pressed in by the rounded periphery surface 100 on the gear pulley 92 on the side of its top area, and tooth 94 protrudes from gear pulley 92.At this moment, the free end 102 of engaging tooth 94 extends into groove 88 so that reinforcement fabric ply 40 is pressed on the peripheral surface 90 of groove 88 bottoms with flushing.
When mould 84 and gear pulley 92 continue to carry out relative the rotation from the position of Fig. 6, the outer surface 100 of gear pulley 92 is trapped in reinforcement fabric ply 40 on the projection 86 at A place on the top area opposite side, therefore before upstream tooth 94 moves on in the groove 88 at B place tissue layer 40 is fastened on the there, this rear surface 100 is pressed in tissue layer 40 top-side at C place protruding 86.
By the processing of this order, reinforcement fabric ply 40 can be steadily and is assemblied in consistently in each groove 88 and need force to prolong reinforcement fabric ply 40.A driving tooth 94 is arranged in groove 88, thereby contiguous tooth 94 is separated with reinforcement fabric ply 40 and can not be tending towards stretching it.The distortion of therefore impossible generation reinforcement fabric ply 40 or mobile.Repeat this action around the continuous engagement rotation and the gear pulley 92 of axis 96 around the continuous engagement rotation of axis 104 by mould 84, thereby reinforcement fabric ply 40 is assemblied in tightly on the whole peripheral surface 90 of mould 84.One to four layer of reinforcement fabric ply 40 can apply in this way.This processing finally will be sheared reinforcement fabric ply and shearing end is pasted on the mould 84.
The adhesive that is used for fastening reinforcement fabric ply 40 can comprise the various rubber composition that dissolves in solvent, for example MEK (MEK) and the toluene that mixes each other.This rubber adhesive has been arranged, and reinforcement fabric ply 40 can be closely and is fixed on safely on the peripheral surface 90 of mould 84.
Shown in Fig. 7 and 8, thereby the contraction rubber layer 24 that will be used for mould 84 is wrapped in around the mould and will cut end face 106,108 and is docking together and forms the shape that circulates.Here, compression rubber layer 24 is unvulcanized.Its end 106,108 is preferably through cutting, thereby is convenient to connect and be kept perfectly at joint 110.Can use the connection at supercharging anchor clamps (not shown) fastening 110 places.In addition, can heat and pressurize,, thereby guarantee the connection of end 106,108 better as thermal pressure machine (not shown).
In one embodiment, be 1 to 2kg/cm from 80-120 ℃ temperature lower surface pressure
2Continue 10-30 and heat pressurization second.Preferably, joint 110 is positioned at the groove 88 on the mould 84.If joint 110 is positioned at protruding 86 places, trend towards moving to the bottom of tooth 44 at finished belt 12 center taps 110.Therefore, be easier to begin to rupture at joint 110 places.
The resin film that will have good heat resistance and good release property, be wrapped in shrink rubber layer 24 around.Preferably make individual layer.Resin film can be made by antiseized medium polymethylpentene or polyethylene terephthalate.
Use the contraction rubber layer 24 on 116 pairs of moulds 84 of sulfuration overcoat to vulcanize.This assembly is placed in the sulfuration container and under the external pressure of 160-180 ℃ temperature and 0.8 to 0.9MPa and handled 5-10 minute subsequently.By this processing, shrink rubber layer 24 and be assemblied on the mould 84, as shown in Figure 8.In vulcanizing treatment, 110 places do not crack at joint.
Be to be understood that and carry out the connection of mould like this, promptly do not use sulfuration overcoat and container and will shrink the outside heating of rubber layer 24 and pressurize by band system or pressure system.
In Fig. 9, foregoing, formed the mould 84 that shrinks rubber layer 24 on it, be placed in the forming machine (not shown), helical form is twined load cord 30 around it afterwards.Place yielding rubber layer 28 and also place elongation rubber layer 26 and reinforcement fabric ply 36 subsequently thereafter.Can remove mould 84 and be placed on the brace table that is meshed with above-mentioned sulfuration overcoat 116 from forming machine subsequently.
This combination can be placed on the sulfuration of carrying out common mode in the sulfuration container subsequently.After sulfuration was finished, overcoat 116 separated and belt or belt sleeve preform 12 ' is separated from mould 84 successively from mould 84.
Next, belt or belt sleeve preform 12 ' are placed on the axle and become predetermined width corresponding to the desired width right angle cuts of final belt 12.Therefore, final belt preform 12 ' is a rectangle, as shown in figure 10.Single belt preform 12 ' is installed on the belt former 120 subsequently, shown in Figure 11-16.The side 20 ' of belt preform 12 ', 22 ' is comprised a blade 124,124 ' the oblique cutting of cutter subsequently, is partitioned into the annular waste material of Endless from finished belt 12.Form side 20,22 (see figure 2)s that finally have right angle cuts side surface portion 46,48 and tangentially cut side surface portion 50,52, thereby made belt 12.
Be described in detail a preferred embodiment of belt former 120 referring now to accompanying drawing 11-16.Belt former 120 comprises the spacing shaft 126,128 that can rotate around spaced apart parallel axle 130,132 respectively.Belt or belt sleeve preform 12 ' lead around axle 126,128.Axle 126 drives towards the direction of arrow A by motor 134 and rotates around axis 130, thereby makes belt or belt sleeve preform 12 ' with the motion of circulation mobile route, shown in arrow A 1.
Figure 11 and 13 axis 126, the 128 all mode with cantilever are outstanding from left to right.Axle 126 comprises installation component 136, has with the small diameter portion 138 of major diameter part 140,142 as the border.Major diameter part 140 is limited by holding flange 144, and major diameter part 142 is limited by removable flange 146.The outer surface 54 (Figure 10) of belt preform 12 ' is to the surface of the radial outward of small diameter portion 138 148 application of forces.Angle 150,152 on the flange 144,146 is respectively radiation/circle radially, so that belt or belt sleeve preform 12 ' are directed on it with against the surface 148 between the flange 144,146.
By holding flange 144,144 ' is shifted to and left to flange 146,146 ' along double arrowed line 154,154 ' respectively, can select to dwindle and widen groove 156,156 ' width W.When having belt or belt sleeve preform 12 ' around the axle 126,128, thereby flange 146,146 ' can move towards flange 144,144 ' belt or belt sleeve preform 12 ' are clipped between the major diameter part 140 ', 142 ' between the major diameter part 140,142 on the axle 126 and on the axle 128.Movable flange 146,146 ' can be moved in synchronization, and for example by pneumatic or hydraulically operated equipment 160, thereby retaining groove 156,156 ' width W are all identical in all.
Groove 156,156 ' radial depth preferably make at least a portion (Figure 10) of constriction 34 be contained in the groove and remain between the major diameter part 140,142 and 140 ', 142 '.If have only elongated portion 32 to be contained in the groove 156,156 ', the back will be described in detail removes waste material 161,161 ' (Figure 13) and can can't move past major diameter part 140,142 and 140 ', 142 ' and follow it and move.Finally, waste material can disturb basic cutting operation, and will have to carry out a procedure it is removed.In addition, can utilize darker recess configurations clamping belt or belt sleeve preform 12 ' more tightly.
In this embodiment, as clearer illustrating among Figure 12, two isolated cutting positions 162,162 ' are arranged in cutting gap 164, with interior all 166 borders of belt or belt sleeve preform 12 ' as cutting gap 164.Therefore cutting position 162 under the running tension effect, is promptly drawn by driving shaft 126 on the length 168 of belt between the axle 126,128 or belt sleeve preform 12 '.Cutting position 162 ' in the return path part, therefore is not subjected to the tension force effect on the length 170 of belt between the axle 126,128 or belt sleeve preform 12.
Promote assembly 172,, thereby be installed in cutting position 162 and in cutting process, make its reinforcement to the outside 18 application of forces of belt or belt sleeve preform 12 ' for example with the form of synthetic resin cylinder.Provide similar promotion assembly 172 ' to carry out same function at cutting position 162 '.
Provide director element 174,176 in side, the interval application of force of belt or belt sleeve preform 12 ' to limit its moving on the transverse direction of belt or belt sleeve preform 12 ' length in cutting operation.In this embodiment, each side at belt or belt sleeve preform 12 ' all has two director elements 174,176.
Provide same director element 174 ', 176 ' at cutting position 162 '.Director element 174,176,174 ', 176 ' all is the form of roller, rotates to the belt that moves or the belt sleeve preform 12 ' application of force time.Similarly, in cutting process, promoting roller 172,172 ' can be around its axle 178,178 ' rotation to the belt that moves or the belt sleeve preform 12 ' application of force time.
Guide roller 174,176 ' all has fixing rotating shaft separately.By the device (not shown) roller 176,174 ' that is fit to can along belt or belt sleeve preform 12 ' length laterally move and can select near and leave roller 174,176 ' is installed belt or belt sleeve preform 12 ' to meet specific width.All rollers 174,174 ', 176,176 ' can rotate to the belt that moves or the belt sleeve preform 12 ' application of force time synchronously.As shown in Figure 11, promote roller 172 and vertically remain on guide roller between 174,176, and promote roller 172 ' same vertically remain on guide roller between 174 ', 176 '.
So setting device 120 makes the outside 18 (Figure 10) of belt or belt sleeve preform 12 ' be pushed billowing 172,172 ' pressure that applies to be scheduled to.Promote roller 172,172 ' and belt or belt sleeve preform 12 ' between pressure can in the scope of 15-50N, regulate.Capture pressure or place adjacent side face 20 ', 22 ' place thereby removable roller 176,174 ' can make pair of rollers 174,176 and 174 ', 176 ' apply in the side of belt or belt sleeve preform 12 ' in the direction adjusted transverse to belt or belt sleeve preform length.
The device 120 that such setting has been arranged can be operated motor 134 with driving shaft 126.This makes belt or belt sleeve preform 12 ' move on circulating path, owing to be arranged in to belt or belt sleeve preform 12 ' capturing property within the groove 156,156 ' and between guide roller 174,174 ', 176,176 ', so will preestablish this circulating path.Therefore, big skew can not taken place from the linear operation route by continuous steerable in belt or belt sleeve preform 12 '.Therefore, be convenient to the accurate cutting of belt or belt sleeve preform 12 '.
At cutting position 162, blade 124 has with respect to belt or belt sleeve preform disc body 180 at a slant.Disc body 180 by with the belt of operation or belt sleeve preform 12 ' contacts and around axis 182 along the rotation of the direction of arrow 184.Foregoing, blade 124 is provided and promotes roller 172 vertical alignments at cutting position, thereby in cutting process, belt or belt sleeve preform 12 ' are clamped in wherein.The main body 180 of blade 124 pierces through belt or belt sleeve body sideling from the inboard, thereby carries out oblique cutting with respect to the above-mentioned reference planes P that in its both sides belt or belt sleeve preform 12 ' is halved and hang down as for axis 130,132.
Constructing blade 124 makes blade 124 can not contact promotion cylinder 172 in device 120 operating process with promotion cylinder 172 and its relative position.Finally, promote cylinder 172 and can not injured, thereby have long service life by blade 124.In addition, owing in use can not damage guidance set, thereby can keep the precision of cutting.
Blade 124 ' has corresponding disc body 180 ', and it can be around the direction rotation of axis 182 ' along arrow 184 '.The same with promotion cylinder 172 cooperation way with blade 124, blade 124 ' is also aforesaid cooperates with promotion cylinder 172 '.
Foregoing, the oblique cutting of side 20,22 from belt or belt sleeve preform 12 ' upward to boundary position BL.In this specific embodiment, the distance L 3 of expression right angle cuts side surface portion 46,48 vertical dimensions equals L.Blade 124,124 ' angle of attack θ can be provided with as requested, preferably within 20-60 ° scope.
To narrate the complete operation that use device 120 forms the belt 12 among Fig. 2 now.As shown in figure 11, operating moving device 160 is left flange 144,144 ' with mobile flange 146,46 ', thereby it is wideer around the belt or the belt sleeve preform 12 ' of draw around the axle 126,128 to make that groove 156,156 ' compares.Similarly, guide pulley 176,174 ' moves away cylinder 174,176 ', thus the wideer distance of the belt that spaced apart once more ratio will cut or belt sleeve preform 12 '.
Guide pulley 176,174 ' is shifted to guide pulley 174,176 ' subsequently, thus cutting position 162,162 ' and belt or belt sleeve preform 12 ' be close to engagement.
Can operate motor 134 drives tensioning with the operating path of circulation belt or belt sleeve preform 12 ' subsequently.At each cutting position 162,162 ', blade 124,124 ' becomes the θ angle to be pressed into sideling to shrink rubber layer 24 with respect to reference planes P, with belt or belt sleeve preform 12 ' be squeezed in closely blade 124,124 ' and promotion cylinder 172,172 ' between.Finally, a side 20 ' of belt or belt sleeve preform 12 ' is by the 124 oblique cuttings of a blade, and opposite side 22 ' is by another blade 124 ' oblique cutting.When cutting position 162,162 ' cuts, belt or belt sleeve preform 12 ' are by blade 124,124 ', promote cylinder 172,172 ' and guide pulley 174,174 ', 176,176 ' acting in conjunction, firmly be fixed and held in its linear operation path.
Separate the annular scrap 161,161 ' of circulation respectively from belt or belt sleeve preform 12 ' by blade 124,124 '.When separating, scrap 161,161 ' the axially outwards extruding of axis 130,132 with respect to axle with engagement and around major diameter part 140,140 ', 142,142 ', thereby are being followed rotatablely moving of axle 126,128.Scrap 161,161 ' the actual power of the being extruded assembly axially outwards wedging blade 124,124 ' and promotion cylinder 172,172 ' between.Perhaps, can think that scrap 161,161 ' released by the wedge shape of blade 124,124 ' leading end.Round angle 150,152 on the flange 144,146, and flange 144 ', 146 ' goes up same round angle 150 ', 152 ', is convenient to scrap 161,161 ' transition of 140,140 ', 142,142 ' from small diameter portion 138, a zone of 138 ' to the major diameter part.Scrap 161,161 ' centers on and continues following axle 126,128 and move, and the tensile force on belt or belt sleeve preform 12 ' is by removal.Thereby, during cutting these scraps 161,161 ' hardly may with the operative interventions of device 120.Simultaneously, scrap 161,161 ' can be reclaimed when finishing cutting operation expediently by discharging tension force, and makes each several part as single part and simple separation.
Finish cutting operation, stop axle 126 rotation, and blade 124,124 ', guide pulley 176,174 ' and flange 146,146 ' turn back to their original position.After this, can the removal belt tension, and belt or belt sleeve 12 separate with scrap 161,161 '.
The present invention has considered multiple variation from basic structure, and as mentioned above, foundation structure is in fact just as example.As an embodiment, belt composition is not limited in the belt that has tooth in its constriction.The dual toothed belt that tooth is provided on the elongated portion 32 equally also can use same inventive concept.
Change as another kind, promote cylinder 172,172 ' and act on the belt or the belt sleeve preform 12 ' outside, can be and promote cylinder 172,172 ' at the enterprising line operate in opposite side, in the present embodiment, be in that side that forms tooth, promptly on the constriction 34.Promote cylinder 172,172 ' also can exercisable relatively belt or belt sleeve preform regulate.
Though described the situation of two axles 126,128, also can use three or more axle guiding belts or belt sleeve preform 12 ' to move, also can on the path that is not linearity continuously, operate.Particularly have under the situation of skin band of square-section, can be at belt oblique cutting belt in three or more operation, as long as apply suitable tensile force at each cutting position of belt.
Though the installation component of being narrated 136,136 ' has a holding flange 144,144 ' and removable flange 146,146 ', also can use two fixing and/or two removable flanges to realize the present invention.It is desirable to, belt or belt sleeve preform 12 ' are clipped between large-diameter portion divides securely, and shown under the situation of belt composition, preferably make and shrink rubber layer between large-diameter portion is divided.
Though described mobile device 160, also can sequentially carry out flange 146,146 ' move with moved further flange 146,146 ', perhaps uses other mode.
Though described cutting is in the position 162,162 ', wherein a position of belt or belt sleeve preform 12 ' under the tensile force effect of operation and another position in the tensioning portion of return path/not, the position of tensioning of the tensioning but two cutting positions also can coexist/not.If like this, more particularly, cutting can be carried out in the position of operation tensile force effect at belt or belt sleeve preform 12 ', thereby avoids the skew of belt in the cutting process.Any significant skew all can damage the precision of oblique cutting technique.
In addition, blade 124,124 ' and promote assembly 172,172 ' position can be put upside down.
Improve as another kind, can omit the bight 150,152,150 ', 150 ' of circle/radiation.Yet this structure is desirable.As the replacement of being cut into fillet, can be cut sth. askew in the bight, or other change.
Blade 124,124 ' can simultaneously operating, perhaps delay operation one by one if having time.
Similarly, as described above, the present invention is actual can be implemented on the belt of any kind, and no matter whether it has tooth.
To narrate special a manufacturing and forming technology of belt 12 example shapes now.Load cord 30 is that the aramid fibre of TWARON is made by the trade mark of being sold.The Denier of cord 30 is 1,500, and is twined to the direction opposite with vertical direction, and whole sth. made by twisting amount is every 10cm15.8 time for every 10cm19.7 first twist amount, is 9,000 2 * 3 cords that are untreated thereby obtain total Denier.The cord that is untreated is immersed in the isocyanates adhesive in advance, in about 170-180 ℃ drying, immerses in the RFL solution again.Cord extends heat fixation at 200-240 ℃ subsequently to be handled.
For reinforcement fabric ply 36,40, used wide angle plain weave canvas with stranded yarn, be that aramid fibre and the polyethylene of TWARON draws very much phthalyl salt (PET) fiber wherein with 50: 50 weight ratio mixed selling trade mark.Canvas immerses in the RFL solution and 150 ℃ of heat treatments of carrying out two minutes.Afterwards, be the canvas coating rubber synthetic of handling with the friction coating processes.
Contraction and elongation rubber layer 26,28 usefulness have embedded the chloroprene rubber of aramid staple and have made, and the rubber of wherein per 100 parts of weight adds the amount of 25 parts of weight.Yielding rubber layer 26 usefulness wherein do not contain the chloroprene rubber of artificial reinforcement short fiber and make.
The 70 following manufacturings of tooth pad.Strengthening fabric and one deck for one shrinks rubber layer and is superimposed and is placed among the flat-die that has alternating groove and projection.System is 75 ℃ of pressurizations.By this technology, formed tooth pad 70.The two ends of tooth pad are all fallen in the top perpendicular cuts.
Tooth pad 70 be wrapped in master mold around, make with vulcanized rubber, be connected on the formwork for cylindrical columns, and dock mutually the end.Load cord 30, be used to extend the half finished rubber layer of rubber layer 26, and reinforcement fabric ply 36 twines thereon one by one.Overcoat is placed on this assembly and puts into the sulfuration container and carry out vulcanizing treatment.Thereby produce belt or belt sleeve preform 12 '.
Final belt or belt sleeve preform 12 ' are with the cutter right angle cuts and become the single belt preform 12 ' that the cross section is a rectangular shape.Belt preform 12 ' is arranged on the axle 126,128 of belt former 120, and passes when cutting takes place by the contraction rubber layer that promotes cylinder 172,172 ' the belt preform 12 ' that supports.Boundary position BL is set to 100% L, and blade 124,124 ' oblique cutting is used in side 20 ', 22 '.Thereby produce burr toothed timing belt 12.
Cut with 42 ° of angles side 20,22, and 20,22 have evenly exposed artificial reinforcement short fiber 58 in the side.The length of final burr toothed timing belt is 300mm, and being placed on diameter is on the V-arrangement pulley of 90mm, and winding angle is 45 °.Applied the load of 2.7N at an end of belt, and measured at the necessary load F of speed pulling of the other end with the 30mm per second.F can obtain coefficient of friction from this load.
Above-mentioned belt 12 is placed on the horizontal operation tester of diaxon, has the drive pulley of diameter 167.4mm and the follow-up pulley of diameter 133.0mm.Follow-up pulley is applied in the load of 330kgf.Drive pulley is with 3, and the speed of 000rpm is rotated.After six hours test run, with the belt weight of measuring after the test run in six hours, divided by the belt weight of measuring before the operation test beginning, thus the wear extent of measuring.
Narration moves the result of test below.When the surface of carrying out oblique cutting was 1 by the coefficient of friction of the ordinary straps of grinding and polishing, the coefficient of friction of belt of the present invention was 1.4.Compare wear extent six hours operation test backs, wear extent is 1 under the situation of ordinary straps.And on the other hand, the wear extent of belt of the present invention is 0.7.
In addition, the side temperature one hour operation test back ordinary straps is 135 ℃.On the other hand, the side temperature of belt of the present invention is 126 ℃, is lower than the temperature of ordinary straps.
Foregoing, belt of the present invention can be made and make that the slippage of belt is very little, particularly at first in operation, thus the wear extent when can suppress initially to install, and belt temperature can be kept quite low.
In Figure 17-19, be shown 120 ' according to the improved form of belt former of the present invention.Belt former 120 ' comprises main body 188 and driving and driven shaft 126 ', 128 ', and is corresponding with the axle 126,128 of belt former 120.Axle 126 ', 128 ' is respectively around axle 130 ', 132 ' rotation.Axle 126 ', 128 ' is outstanding to the page outside of Figure 17 from main body 188 with the form of cantilever.Thereby another that at least one in 126 ', 128 ' of axle can be in axle 126 ', 128 ' moves the vertical interval that changes between it, so that belt or belt sleeve preform 12 ' are installed around it.This helped before technology and the installation of belt or belt sleeve preform 12 ' and the processing of dismounting and different belt sizes afterwards.
Motor 134 ' is around the direction driving shaft 126 ' of axis 130 ' towards arrow 190.At this moment, lead around axle 126 ', 128 ' belt or belt sleeve preform 12 ' on every side and enter circulating path, make axle 128 ' whereby around of the direction rotation of its axis 132 ' towards arrow 192.By such layout, belt belt or belt sleeve preform 12 ' are being in tensioning state by arrow 194 indicated passage portion, and are being returned to relaxed state by arrow 196 indicated passage portion.
Belt or belt sleeve preform 12 ' can be any structure, and be depicted as can be as previous with reference to figure 2 described cog belt forms.Cut belt or belt sleeve preform 12 ' in advance, make that side 20 ', 22 ' is parallel to each other, and the cross section of main body 14 is a rectangle.Tooth-shape structure has been arranged, and tooth 44 (not being shown specifically) limits the border of cutting gap 164 ' on interior all 166.
Axle 126 ', 128 ' can have the foregoing structure identical with spools 126,128, perhaps has different structures.In preferred versions, axle 126 ' has groove 156 ".Axle 126 ' has by major diameter part 140 ", 142 " small diameter portion 138 that limits ", corresponding to the 26S Proteasome Structure and Function of same figure notation parts among the embodiment of front.Equally, axle 128 ' has by major diameter part 140 " ', 142 " ' small diameter portion 138 of limiting " '.
Groove 156 ", 156 " ' width can be that mechanism or other different mechanisms fixing or the belt former 120 by as described change.Arrange like this, belt or belt sleeve preform 12 ' can lead around axle 126 ', 128 ' on every side and be clamped in major diameter part 140 ", 142 " and 140 " between ', 142 " ', thereby on linear operating path, be stabilized guiding.
Cutter 198 is provided in cutting gap 164, and has been designed at cutting position 162 ", 162 " ' belt or the belt sleeve preform 12 ' of oblique cutting operation, corresponding with aforementioned cutting position 162,162 '.
At each cutting position 162 ", 162 " ', belt guiding/supporting component 200,200 ' is provided.Belt guiding/supporting component 200 has comprised at the identical assembly of cutting position 162; Promptly promote assembly/cylinder 172 and guidance set/cylinder 174,176.Equally, belt guiding/supporting component 200 ' has comprised at the identical assembly of cutting position 162 '; Promptly promote assembly/cylinder 172 ' and guidance set/cylinder 174 ', 176 '.
Cutter 198 comprises the desk blade 202,202 ' of the substrate 204 on the cantilever 206 of ining succession, its outstanding cutting gap 164 ' that enters into.Arm 206 is in substantially parallel relationship to the rotating shaft 130 ', 132 ' of axle 126 ', 128 ' in the length of double-head arrow 208 directions.
Belt former 120 ' comprises the Tool Control mechanism 210 that has the first fixed support platform 212.Rotation substrate 214 is installed on the slide block 216, and slide block is directed with respect to platform 212 along rectilinear translation, by double-head arrow 217 expressions.Second 218 around vertical axis 220 rotations of slide block 216 relatively supported in substrate 214.Arm carrier 222 comprises substrate 224 and install to carry cantilever in the substrate 224 as prolonging support 226.Substrate 224 can be moved relative to second 218 guiding along the straight line of double-head arrow 228 expressions, with the straight line quadrature by arrow 217 expressions.Prolong support 226 and have free end 230, away from substrate 224, arm 208 cantilevers are mounted thereto.The length that arm 208 extends basically with the length quadrature that prolongs support 226.
Provide servo motor or other mechanism's (not shown) with so that slide block 216 moves relative to first 212, made rotation substrate 214 relative slide blocks 216 pivots, and substrate 224 is moved relative to second 218.By sequencing, moving of coordinating, the cutter 198 on the arm 208 can translation and is positioned at once more in the cutting gap 164.
Blade 202,202 ' has same structure, but and nonessential like this.They all form the dish type blade separately.Such structure has been arranged, and each blade 202,202 ' whole periphery have limited cut edge 232,232 '.
Blade 202,202 ' substrate 204 and the arm 206 of connecting as described below.In this embodiment, with screw threads for fastening screw 233 (illustrating) blade 202,202 ' is fixed on substrate 204 and the arm 206.Blade 202,202 ' has central shaft 234,234 ' respectively.The distance that blade 202,202 ' is axially offset to one another out equals the thickness of substrate 204, but is keeping the overlapping relation of radial component, and axle 234,234 ' is inconsistent.Blade 202,202 ' is parallel to each other basically.Blade 202,202 ' relative to each other and substrate 204 and arm 206 fixing.
Owing to axially be spaced apart from each other, blade 202,202 ' can positively be fixed and can not interfere with each other.Blade 202,202 ' can not bump or otherwise interfere with each other.Finally, blade 202,202 ' can not be damaged, and has therefore saved relevant therewith General Maintenance, for example grinding or replacement.
The first state blade 202,202 ' and cutter 198 fixing, trip bolt 233 is tightened.Can unclamp trip bolt 233 and change this state of cutter 198, thereby make blade 202,202 ' respectively around their axle 234,234 ' rotation, with another part of exposing cut edge 232,232 ' periphery for use.Thereafter, cutter 198 can become the first state blade 202,202 ' fixed position again.The length straight line of the relative arm 206 in plane at 233,233 ' place, cut edge is angled.
Now will be according to the operation of belt former 120 ' narration cutting recited above.Among the embodiment in front, rectangle belt or belt sleeve preform 12 ' can place groove 156 ", 156 " ' and lead around axle 126 ', 128 '.Thereby axle in 126,128 ' or two can be moved the spacing that increases between them, thereby belt or the belt sleeve preform 12 ' of tensioning on them.Groove 156 ", 156 " ' a degree of depth part of preferably make shrinking rubber layer 24 stay major diameter part 140 ", 142 " and 140 " between ', 142 " '.Promote assembly/cylinder 172,172 ' and director element 174,174 ', 176,176 ' regulate as previously mentioned, perhaps can be predisposed to special belt or belt sleeve preform structure.
In case set up system like this, just work of motor 134 '.Tool operating controlling organization 210 uses a side of blade 202 oblique cutting belts or belt sleeve preform and uses blade 202 ' cutting opposite side subsequently subsequently.
More particularly, as shown in figure 18, cutter 198 drives towards the direction of arrow 236, makes that the blade 202 ' that stretches out is oblique with respect to the reference planes P of bisection belt or belt sleeve preform 12 ' between its side 20 ', 22 ', thereby with oblique cutting side, θ angle 22 '.Thereafter cutter 198 is basically towards the direction opposite with arrow 236, moves towards the direction of arrow 238, cuts the opposite side 20 ' of belt or belt sleeve preform 12 ' equally, and this skew back is become the θ angle to being cut into the relative reference plane P.
In this embodiment, cutting position 162 ", 162 " ' actual in identical vertical height, thereby do not need to change the upright position of cutter 198.Yet this is not necessary.Promote cylinder 172,172 ' and in the cutting operation process of belt or belt sleeve preform 12 ' each side, strengthened belt or belt sleeve preform 12 '.By such layout, when the cutting operation that forms vee-belt 12 carried out, belt or belt sleeve preform 12 ' were fixed and held in the path of linear operation definitely.
Because cutter 198 comprises single structure, wherein blade 202,202 ' is as whole moving, thus cutter 198 can make relative compact so that in cutting gap 164, work.Finally, can simplify the whole system structure, and can be so that weight is lighter relatively.
In addition, because cutter 198 oppositely moves in the narrow cutting gap 164 of level, need cutter 198 to carry out moving relatively in a small amount, the process equipment of comparing before this may reduce the time of processing.
Equally, the supporting construction of cutter 198 comprises cantilever 206, can make simply relatively and compact.
Blade 202,202 ' radially overlapping relation also are of value to the compactness of whole system.
Blade 202,202 ' can pivot and avoid frequent replacing blade 202,202 '.By select pivoting and fixed blade 202,202 ' once more, damage in some part, wearing and tearing or otherwise can also provide cut edge 232, other different pieces of 232 ' in the rust.Therefore, can reduce whole maintenance cost and inconvenience.
Because cutter 198 is in the same vertical height work of belt or belt sleeve preform 12 ' both sides, same cutter 198 can be used for processing relatively short belt or belt sleeve preform 12 '.
The multiple variation of described basic structure above the present invention has considered.To narrate wherein some below.Blade 202,202 ' location, and the distance between their axis can change according to oblique cutting angle and depth of cut.
In embodiment in front, belt or belt sleeve preform 12 ' can be led around more than on two the axle, and process in roughly same mode.
Belt guiding/supporting component 200,200 ' character can become the form shown in being different from.Can change the quantity and the layout that promote roller.Give one example, promote cylinder and can be arranged as the outer surface that promotes belt or belt sleeve preform 12 '.Promote cylinder can be arranged as shown in form the zone of tooth, the inboard that promotes belt or belt sleeve preform 12 ' in the structure.
The particular configuration of cutting controlling organization 210 is actual just as example.Those skilled in the art can with shown in structure obviously differently, design the different modes of unlimited amount and reorientate cutter 198.
The present invention narrates with reference to the accompanying drawings, is to be understood that under the situation that does not deviate from marrow of the present invention and scope, can also carry out many modifications.
Claims (33)
1. manufacture method of making power transmission belt or belt sleeve, the method comprising the steps of:
Endless-belt or belt sleeve preform are provided, and it has inboard, the outside and side, interval, and comprises at least one load cell that shrinks between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside;
Belt or belt sleeve preform are led around having at least the first and second of first and second axis;
Thereby driving at least one axle makes belt or belt sleeve preform move on circulating path;
Provide the promotion assembly in the inboard of belt or belt sleeve preform and the primary importance of the side in the outside; This primary importance does not have by described first and second support at primary importance place belt or belt sleeve between described first and described second thus;
Provide at least one side of at least one director element, with moving of restriction belt or belt sleeve preform with back-up belt or belt sleeve preform;
Cutter is provided; With
The guiding cutter at primary importance or contiguous primary importance place from the inboard of belt or belt sleeve preform and the opposite side the outside against belt or belt sleeve preform, and at least one director element is against described at least one side, thereby the described side in the inboard of belt or belt sleeve preform and the outside is pushed assembly and supports, and therefore re-constructs belt or belt sleeve preform; Be decided to be L from the belt or the belt sleeve preform outside to the distance the load cell outside, with respect to belt or belt sleeve the preform oblique cutting belt of five equilibrium plane P between the side or the side, interval of belt sleeve preform at interval, from belt or belt sleeve preform outside lateral extent be that the boundary position of 90-100% of L is to the inboard of belt or belt sleeve preform.
2. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, it is characterized in that first has small diameter portion between large-diameter portion is at interval divided, described step of leading around belt or belt sleeve preform comprises belt or belt sleeve preform is placed between large-diameter portion at interval divides.
3. the manufacture method of power transmission belt as claimed in claim 2 or belt sleeve is characterized in that described step of leading around belt or belt sleeve preform comprises that the contraction rubber layer with elongation rubber layer and at least a portion is placed between the large-diameter portion branch at interval.
4. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, it is characterized in that described first and second axis are substantially parallel, and the step of described guiding cutter comprises and makes cutter with respect to obliquely cutting the contraction rubber layer with the reference planes of the first and second axis quadratures.
5. the manufacture method of power transmission belt as claimed in claim 4 or belt sleeve, it is characterized in that the described step that endless-belt or belt sleeve preform be provided comprises provides endless-belt or belt sleeve preform, and it is arranged essentially parallel to reference planes in side at interval.
6. the manufacture method of power transmission belt as claimed in claim 3 or belt sleeve, it is characterized in that the belt that provided or belt sleeve preform be provided the described step that endless-belt or belt sleeve preform be provided width at least nominal equal the desired width of final power transmission belt.
7. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve is characterized in that describedly providing the step that promotes assembly to comprise the promotion roller is provided.
8. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, each provides at least one guide roller on side at interval to it is characterized in that providing the step of at least one director element to be included in endless-belt or belt sleeve preform.
9. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, it is characterized in that providing the step that promotes assembly to comprise promoting the assembly position to make and be directed in belt or belt sleeve preform, promote assembly and can not contact cutter at cutter.
10. the manufacture method of power transmission belt as claimed in claim 2 or belt sleeve further comprises changing first step that goes up the interval of large-diameter portion between dividing with the width that holds belt or belt sleeve preform.
11. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, it is characterized in that load cell has the inboard and the outside, and the step that belt or belt sleeve preform are provided comprises belt or the belt sleeve preform with elongated portion and constriction is provided, limit the outside of belt or belt sleeve preform with elongated portion, limit the inboard of belt or belt sleeve preform with constriction.
12. the manufacture method of power transmission belt as claimed in claim 2 or belt sleeve, it is characterized in that guiding the step of cutter to comprise the annular section that makes cutter separate belt or belt sleeve preform, in case it is separated, just surround in the major diameter part that first between centers separates, thereby rotatablely move along with first.
13. the manufacture method of power transmission belt as claimed in claim 11 or belt sleeve, it is characterized in that providing the step of endless-belt or belt sleeve preform that the short fiber that provides length to extend between belt or belt sleeve preform side is provided, this short fiber exposes the side at interval in the oblique cutting of shrinking rubber layer.
14. the manufacture method of power transmission belt as claimed in claim 13 or belt sleeve, it is characterized in that oblique cutting at interval each of side all have an area, provide the step of short fiber comprise the amount of the short fiber that is provided make each at interval the bonded area of the short fiber that exposes of side equal each 20-70% of the oblique cutting area in side at interval.
15. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, belt that it is characterized in that providing the step of belt or belt sleeve preform to comprise providing or belt sleeve preform have certain-length and have along the tooth of the constant spacing of belt or belt sleeve preform length.
16. the manufacture method of power transmission belt as claimed in claim 1 or belt sleeve, it is characterized in that leading step around belt or belt sleeve preform comprises and leading around belt or belt sleeve preform to limit the interior week that defines cutting gap in it, the step of guiding cutter comprise (a) in one direction in cutting gap mobile cutter and (b) going up in cutting gap mobile cutter in the opposite direction to re-construct belt or belt sleeve preform another in the side at interval re-constructing at interval in the side of belt or belt sleeve preform with this side.
17. the manufacture method of power transmission belt as claimed in claim 16 or belt sleeve, it is characterized in that providing the step of cutter comprise the cutter that provides have can be fixed relative to one another first and second blades, to construct belt or belt sleeve preform one in the side and another at interval respectively.
18. the manufacture method of power transmission belt as claimed in claim 17 or belt sleeve, it is characterized in that providing the step of cutter to comprise that the cutter that is provided has first and second desk blades, each blade all has axis, and wherein first and second blades are radially overlapping and axis first and second blades do not overlap.
19. the manufacture method of power transmission belt as claimed in claim 18 or belt sleeve, it is characterized in that also comprising the step that changes cutter from first state, rotate first desk blade around its axis pivot, thereafter the state with cutter becomes first state again, thereby fixes the position of first desk blade.
20. the manufacture method of power transmission belt as claimed in claim 16 or belt sleeve, it is characterized in that providing the step that promotes assembly to comprise that the promotion assembly that is provided strengthens belt or belt sleeve preform when cutter is shifted to a direction, and comprise the step that the second promotion assembly is provided, thereby when shifting to that direction rightabout, cutter strengthens belt or belt sleeve preform.
21. manufacture method of making power transmission belt or belt sleeve, the method comprising the steps of: endless-belt or belt sleeve preform are provided, it has inboard, the outside and interval side, and comprise and shrink at least one load cell between rubber layer, elongation rubber layer and belt or the belt sleeve preform inboard and the outside and have the inboard and the outside, wherein be decided to be L to the distance the load cell outside from the belt or the belt sleeve preform outside; With
With respect to belt or belt sleeve preform side, oblique cutting interval, the five equilibrium plane between the side at interval, from belt or belt sleeve preform outside lateral extent be that the boundary position of 90-100% of L is to the inboard of belt or belt sleeve preform.
22. the manufacture method of power transmission belt as claimed in claim 21 or belt sleeve is characterized in that providing the step of belt or belt sleeve preform to comprise that the belt or the belt sleeve preform that are provided have side, interval parallel to each other basically.
23. the manufacture method of power transmission belt as claimed in claim 21 or belt sleeve, it is characterized in that also comprising belt or belt sleeve led step around first and second spacing shafts, and oblique cutting the step of side is included between first and second at interval, belt or belt sleeve preform be in this side, interval of the oblique cutting in position under the tension force effect.
24. the manufacture method of power transmission belt as claimed in claim 23 or belt sleeve, it is characterized in that also being included in primary importance provides the step that promotes assembly, thereby strengthens belt or belt sleeve when carrying out oblique cutting.
25. the manufacture method of power transmission belt as claimed in claim 24 or belt sleeve, it is characterized in that leading step around belt or belt sleeve preform comprises and leading around belt or belt sleeve preform to limit the interior week that defines cutting gap in it, oblique step of cutting comprises uses cutter to carry out oblique cutting, the step that this method also comprises have (a) along a direction in cutting gap mobile cutter re-constructing at interval in the side of belt or belt sleeve preform, and (b) along with this side in the opposite direction in cutting gap mobile cutter to re-construct in the side, belt or belt sleeve preform interval another.
26. a power transmission belt comprises
Have the main body of inboard, the outside and interval side, and comprise at least one load cell that shrinks between rubber layer, elongation rubber layer and the main body inboard and the outside,
Load cell has the inboard and the outside,
It is characterized in that the distance from the external side of main body to the load cell between the outside is decided to be L, with respect to the side, interval of the oblique cutting main body in five equilibrium plane between the main body side, from main body outside lateral extent be that the boundary position of 90-100% of L is to the inboard of main body.
27. power transmission belt as claimed in claim 26 is characterized in that having the short fiber that length is extended in the main body between the main body side.
28. power transmission belt as claimed in claim 27 is characterized in that short fiber remains in the contraction rubber layer.
29. power transmission belt as claimed in claim 28 is characterized in that fiber is exposed by the main body side surface of oblique cutting in main body.
30. power transmission belt as claimed in claim 29 is characterized in that each all has an area to main body by the main body side of oblique cutting, the area that short fiber exposes in each side of main body equals the main body side by the 20-70% of oblique cutting area.
31. power transmission belt as claimed in claim 30 is characterized in that short fiber and main body side flush.
32. power transmission belt as claimed in claim 26 is characterized in that main body has certain-length and forms tooth along principal length with constant spacing.
33. power transmission belt as claimed in claim 26 is characterized in that this power transmission belt is (a) vee-belt, (b) V-arrangement ribbing belt and (c) a kind of in the flat belt.
Applications Claiming Priority (18)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004243115 | 2004-08-24 | ||
| JP2004-243115 | 2004-08-24 | ||
| JP2004243115 | 2004-08-24 | ||
| JP2004345100 | 2004-11-30 | ||
| JP2004345100 | 2004-11-30 | ||
| JP2004-345100 | 2004-11-30 | ||
| JP2004-368965 | 2004-12-21 | ||
| JP2004368965 | 2004-12-21 | ||
| JP2004368965 | 2004-12-21 | ||
| JP2004-372947 | 2004-12-24 | ||
| JP2004372947 | 2004-12-24 | ||
| JP2004372947 | 2004-12-24 | ||
| JP200523069 | 2005-01-31 | ||
| JP2005-23069 | 2005-01-31 | ||
| JP2005023069A JP4727239B2 (en) | 2005-01-31 | 2005-01-31 | Bias cut device |
| JP2005155427 | 2005-05-27 | ||
| JP2005155427A JP4813098B2 (en) | 2004-08-24 | 2005-05-27 | Power transmission belt manufacturing method and bias cut device |
| JP2005-155427 | 2005-05-27 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102662380A Division CN101934594B (en) | 2004-08-24 | 2005-08-23 | Apparatus for forming power transmission belt/belt sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1769036A CN1769036A (en) | 2006-05-10 |
| CN1769036B true CN1769036B (en) | 2011-01-19 |
Family
ID=43388280
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510116011 Active CN1769036B (en) | 2004-08-24 | 2005-08-23 | Method for making a power transmission belt/belt sleeve and a power transmission belt |
| CN2010102662380A Active CN101934594B (en) | 2004-08-24 | 2005-08-23 | Apparatus for forming power transmission belt/belt sleeve |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102662380A Active CN101934594B (en) | 2004-08-24 | 2005-08-23 | Apparatus for forming power transmission belt/belt sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN1769036B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487738A (en) | 2012-07-26 | 2015-04-01 | 阪东化学株式会社 | Transmission belt with notch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488465A (en) * | 1981-07-16 | 1984-12-18 | Hermann Berstorff Maschinenbau Gmbh | Method and apparatus for cutting open-flanked or open-sided V-belts |
| US4782575A (en) * | 1986-03-25 | 1988-11-08 | Mitsuboshi Belting Ltd. | Method of fabricating a power transmission belt and apparatus therefor |
-
2005
- 2005-08-23 CN CN 200510116011 patent/CN1769036B/en active Active
- 2005-08-23 CN CN2010102662380A patent/CN101934594B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4488465A (en) * | 1981-07-16 | 1984-12-18 | Hermann Berstorff Maschinenbau Gmbh | Method and apparatus for cutting open-flanked or open-sided V-belts |
| US4782575A (en) * | 1986-03-25 | 1988-11-08 | Mitsuboshi Belting Ltd. | Method of fabricating a power transmission belt and apparatus therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1769036A (en) | 2006-05-10 |
| CN101934594A (en) | 2011-01-05 |
| CN101934594B (en) | 2012-07-04 |
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