A kind of extrusion method production process of tire belt and equipment thereof
Technical field
The present invention relates to a kind of production technology and equipment thereof of tire belt of the vehicles, especially relate to a kind of production technology and equipment thereof of novel radial tire undertread.
Background technology
Time is long though traditional cross-ply is continued to use, and the scope of application is wide, the existing certain basis of production technology, since reasonable inadequately on its structure, development influenced, progressively will be replaced by novel radial.The primary structure characteristics of radial have following some:
1. each interlayer of body cord is the meridian direction arrangement by a tyre bead to another tyre bead mutually mutually.The common cross-ply of stress ratio that inner pressure of tire produces body cord few half, and all cords fabric thread are according to being arranged by force direction, every cord is fully stressed;
2. radial tire undertread is main stressed member, bears the 60-75% of the total expansion force of inner pressure of tire;
3. because the body cord meridian is arranged, can bring into play the cord strength effect to greatest extent, but the carcass sidepiece because of the few softness of the number of plies and rigidity not, the normal direction distortion increases 25-30% than cross-ply, position, sidewall song looks for distortion big, does not pierce through.
According to the characteristics of above-mentioned radial, belt is the topmost part of the force of radial, and it is determining the distortion of carcass to a great extent.Directly have influence on the rigidity of tyre surface, thus it to tire and mill property, riding stability, comfortableness etc. has material impact.
Theoretically, belt cord angle (with the angle of tire equator) is more little, and good more to the banding effect of carcass, the rigidity of tyre surface is strong more.But because in the existing production technology, cord angle is too small, not only make technological operations such as the severing of belt and joint complicated, and unfavorable to the tire serviceability, be easy to generate the danger of belt delamination.So existing belt cord is generally the 15-20 degree.But the rigidity of this meridian line tyre still has been subjected to very big restriction, and general belt will adopt the structure than multilayer to remedy defective on its rigidity.This had just both increased cost, had also increased the weight of tire simultaneously, and this just has been subjected to very big restriction at light-duty vehicle aspect the use of radial.
In order to reduce the distortion of belt shoulder, improve the tire shoulder rigidity of radial, reduce distortion and give birth to heat, the protection belt is avoided the fatigue damage that the ess-strain effect produces.Guarantee when running at high speed, to have stable size, improve tyre surface stability, reduce irregular wear, Italy Pirelli company has designed a kind of radial of zero degree belt structure, and it is provided with at two shoulders of belt and two-layerly twines the annular reinforcing bundle bar that two circles form along circumferential array is overlapping.It is compared with ordinary construction belt radial has reduction resistance to rolling, fuel saving; Low-heat-generation falls, tyres durable safety; Tyre surface is stable; Improve the advantages such as lateral rigidity of tire.But this design improves the complexity of technology, be with cost rise to cost more greatly, and the rigidity in the centre of belt does not effectively improve.In order to solve above-mentioned these problems, my company has designed a kind of " radial of zero degree belt " (being the radial of angle between the 0-15 degree of belt cord and tire equator), and the belt of this meridian line tyre adopts the mode of single or some all-steel cord coiled coils.In order to satisfy the production needs of this belt, we have retrieved the related process device.The patent No. is the multiple rubber extruding machine of 00260203.2 utility model steel wire belt, it by all-steel cord spindle frame, extrude multiple adhesive dispenser, cooling draw-gear, severing piecing devices, Wrapping apparatus and double devices for taking-up and constituted.The advantage of this utility model is the production process that belt disperses is step by step concentrated in together, but can't satisfy the production demand of the helical structure belt of " radial of zero degree belt ".
Summary of the invention
The present invention has solved the helical structure belt production and processing technology complicated problems that the employing prior art is carried out " radial of zero degree belt ".
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of extrusion method production process of tire belt is characterized in that it may further comprise the steps:
A is with the steel wire preheating;
B is a steel wire kiss-coating, and forms the kiss-coating pierce tap by expressing technique, or some steel wires are arranged and kiss-coating at a certain distance, forms the kiss-coating pierce tap by expressing technique;
C cools off the kiss-coating pierce tap;
D forms belt with the kiss-coating pierce tap with a determining deviation coiled coil.
This technology is that purpose is even in order to process cord spacing for the requirement of the helical structure belt that satisfies " radial of zero degree belt ", the belt that is coiled to form by the all-steel cord that is covered with colloid around one or some.The all-steel cord of this belt and the angle of tire equator have good banding effect between the 0-15 degree.The preheating of steel wire be for its obtain when the kiss-coating better bonding, and the phenomenon that after cooling, can not occur coming unstuck.Kiss-coating is to have higher temperature with extruding the pierce tap that is covered with colloid that forms after the operation, so need a cooling procedure just have certain firmness, the distance between cord and the cord just can not depart from next procedure.
As preferably, described steel wire pre-heating technique, all-steel cord kiss-coating and expressing technique, steel wire process for cooling order on a production line is finished, all-steel cord under the effect of draw-gear successively by preheating device, kiss-coating and extrusion device and cooling device.Make all-steel cord pass through some procedures under a dynamic action, this design makes operation simple compact, convenient and swift.
As preferably, to carry out dedusting, rust cleaning, scrubbing between described steel wire pre-heating technique and all-steel cord kiss-coating and the expressing technique.Dedusting, rust cleaning, scrubbing are in order to prevent because all-steel cord after totally not causing kiss-coating degumming phenomenon does not take place.
Above-mentioned technical process can be finished by following equipment: a kind of extrusion molding production equipment of tire belt, it is characterized in that all-steel cord that it comprises that order is provided with split sub-frame, preheating device, extrusion device, cooling device, draw-gear and wind, described wind is equipped with roll adjustment equipment, cutter and winding disc in proper order.All-steel cord that splits has set up one or several all-steel cords that splits, and they draw an all-steel cord respectively, and order is by preheating device, extrusion device, cooling device under the traction of draw-gear.Wherein, just formed the pierce tap of definite shape by behind the extrusion device.After cooling,, under the draw of winding disc, enter wind by traction wheel.The effect of roll adjustment equipment is and can axially evenly moves along winding disc along with the rolling of winding disc drives pierce tap, makes all-steel cord coiled coil on winding disc.
As preferably, be provided with one between described draw-gear and the wind and store crane.Because draw-gear drives all-steel cord (pierce tap) simultaneously with winding disc and moves in different operations, both are relatively independent power set, so the speed of the all-steel cord (pierce tap) under both drive simultaneously may be nonsynchronous, so need one to store crane to regulate the outer peripheral lines speed of the speed of the pierce tap by traction wheel when it is rotated with winding disc identical.
As preferably, described extrusion device is provided with an extruder that has T type head, the both sides correspondence is provided with forward and backward model before and after head, and front screed is provided with the through hole that is arranged in a linear at a certain distance, and back model is provided with the extrude groove consistent with the pierce tap dimensional requirement.After several all-steel cords passed through the different through hole of front screed, each bar all-steel cord was just arranged in a straight line according to the spacing of front screed through hole.All-steel cord will be extruded the machine kiss-coating after by front screed, by the groove of extruding of back model, forms the pierce tap that has colloid then.
As preferably, described roll adjustment equipment is provided with a screw mandrel vertical with the steel wire direction of travel, and screw mandrel is provided with an adaptive with it planker.Planker can be under dynamic action evenly motion on screw mandrel, and drive pierce tap along with the rotation of winding disc along the axial dipole field of winding disc.
As preferably, described wind and order are equipped with idler, retaining wheel and amplitude modulation roller.Because the existence that stores crane is arranged, and the height and position when pierce tap enters wind has some changes,, make that the angle when pierce tap carries out wind is constant so need an idler to advance transition; Retaining wheel has positioning action to pierce tap, can prevent the pierce tap off line; Again since pierce tap through too much after multiple working procedure, some skews can take place in steel wire lateral attitude also, influence steel wire and also carry out roll adjustment equipment, so need the amplitude modulation roller that pierce tap is carried out located lateral.
As preferably, be provided with scrubbing, rust cleaning, dust arrester between described preheating device and the extrusion device.
The beneficial effect that brings of the present invention is, simplified the helical structure belt processing technology complicated problems of prior art to " radial of zero degree belt ", for the production in enormous quantities of zero belted-layer tires provide a kind of simply, production technology efficiently.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is a kind of structural representations of the present invention.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: accompanying drawing 1 is a kind of structural representation of the extrusion molding production equipment of a kind of tire belt of the present invention, it comprise all-steel cord that order is provided with split sub-frame 1, preheating device 2, scrubbing rust cleaning dust arrester 3, extrusion device 4, cooling device 5, draw-gear 6, store crane 7 and wind, wind is equipped with roll adjustment equipment 11, cutter and winding disc 12 in proper order.3 to 5 all-steel cords that splits is drawn corresponding all-steel cord, and the traction by draw-gear is by preheating device, scrubbing rust cleaning dust arrester, extrusion device, cooling device.In extrusion device, be provided with an extruder, extruder is provided with T type head, both sides are respectively equipped with removable model before and after head, front screed 41 have be in line the small sircle hole arranged several, so that entering, steel wire extrudes function maintenance certain spacing and neat arrangement, design is slightly larger than steel wire diameter to the diameter of circular hole according to the coefficient of expansion, makes the steel wire of extruding reach the process requirement, and back model 42 is provided with the extrude groove consistent with the pierce tap dimensional requirement.Between the model of front and back, be provided with the binder removal mouth, also be provided with a screw on the binder removal mouth, in order to regulate the sizing material velocity of discharge and quantity.The kiss-coating head temperature is not more than 70 degrees centigrade, and body temperature is not more than 40 degrees centigrade.Be provided with one between draw-gear and the wind and store crane 7.Described roll adjustment equipment is provided with a screw mandrel vertical with the steel wire direction of travel, and screw mandrel is provided with an adaptive with it planker.Described wind is equipped with idler 8, retaining wheel 9 and amplitude modulation roller 10 in proper order.Pierce tap is extruded the back by draw-gear and by a storage crane governing speed, and the pace of pierce tap is consistent with the linear velocity of winding disc periphery.Pierce tap is carried out the transition on the wind by an idler, stop pierce tap under the gravity effect, to fall back by a retaining wheel again, and enter the amplitude modulation roller, after regulating its lateral attitude, the amplitude modulation roller enters winding disc by roll adjustment equipment, winding disc is in the process that the drive pierce tap twines, and the planker on the roll adjustment equipment evenly moves on screw mandrel under the effect of stepper motor.Make pierce tap be wrapped in spiral form uniformly and form belt on the winding disc.Between roll adjustment equipment and winding disc, be provided with a cutter.After the belt winding is finished, start cutter, cut off pierce tap, otch is wrapped sealing compound, finishes the production of belt.
This technology and device thereof have been realized once the finishing of helical structure belt processing technology of " radial of zero degree belt ".Oversimplified and utilized traditional handicraft to be difficult to a technology difficult problem that realizes.