KR810000642B1 - Apparatus for edging reinforced elastomeric stock - Google Patents

Abstract

Appts. for applying elastomeric material against a longitudinal lateral edge of tyre reinforcing fabric (154) so that oxidn. of exposed steel reinforcements is eliminated, includes an extruder(131) mounted on a frame with a fabric support. The extruder has a semicylindrical throat(147) which tapers to an outlet port(149) for location adjacent the fabric edge (153). A forming edge extends along & within the throat and terminates at the outlet port to form an internal C-shaped surface on the extrudate from the outlet port. A wheel(135) is mounted adjacent the outlet port to force the extrudate against the fabric edge whereby the internal surface envelopes the edge.

Description

Edging device to reinforced elastomeric structure

1 is a perspective view of a device for attaching a rim to a laminated, reinforced elastomeric fabric that embodies the concepts of the present invention and operates in accordance with the method, wherein a portion of the device that allows the elastomeric fabric to pass through the device is clarified in the drawings. Has been removed for

2 is a cross-sectional view of a portion of the first FIG. Device showing a brake mechanism for one of two movable extrusion assemblies.

3 is a partial horizontal sectional view taken along line 3-3 of FIG.

4 is a partial vertical section along line 4-4 of FIG.

5 is a partial cross-sectional plan view of one of the extrusion heads.

6 is a front view of a cross section of a reinforced elastomeric fabric and an extrusion head in a position to receive a rubber edge.

FIG. 7 is a view similar to FIG. 6 showing the arrangement and preforming of the rubber sides along one side of the elastic fabric, FIG.

8 is a side view of the overall device showing the tensioning mechanism;

9 is a plan view of the device of the present invention with portions of the support table, extrusion assembly, and delivery assembly removed to show details of the brake mechanism and delivery assembly axis.

10 is a schematic perspective view of a braking mechanism.

11 is a perspective view of another embodiment for embodying the concept of the present invention and attaching the rim to a laminar reinforced elastomeric fabric operating according to the method thereof.

The present invention relates to an edging device (hereinafter referred to as gum edger) to a reinforced elastomeric structure.

Except for the modern cast elastomer technology, which does not require reinforcement, commonly used elastomers such as rubber allow the product to eventually function as a satisfactory product in normal use or to maintain their original shape during the processing required to obtain the desired product. It is well known that it does not have an inherent strength. Thus, these elastic bodies have been reinforced in a thin plate shape generally referred to as "reinforced elastic fabric" by including short fibers or multi-fiber fibers that are considerably less extensible than those. These fibers or reinforcing cords can be made from cotton, nylon, rayon, aramid, polyamide and polyester, glass fibers and metal wires, especially steel in the form of single strands or cables. It includes.

Calendaring is a conventional method of making reinforced elastomeric fabrics, especially for tire plies. When the elastic body is a calendar, the reinforcing code is directed to the thin elastic body discharged from the calendar parallel to the longitudinal direction. It is therefore necessary to cut it obliquely or vertically with respect to the longitudinal reinforcing strands in order for the reinforcing cord to be angled or perpendicular to the surrounding reference plane when the reinforced elastomeric fabric is joined to the tire. have.

More recently developed devices for making reinforced elastomeric fabrics produce relatively narrow reinforced ribbons, the ribbons are cut into strips of desired length, and the strips are joined together and sewn together to form the desired width of fabric. do. The reinforcing strand is then angled or perpendicular to the longitudinal direction of the fabric. Appropriate devices for making fabrics in this manner are described in US Patent No. 3,803,965 and US Patent Application No. 676,903, owned by the applicant. Regardless of such apparatus and method used, that is, regardless of the calendering or assembly of the strips of the reinforced ribbon, when the reinforcing fiber is a metal, the ends of the exposed reinforcement along the cutting edge of the reinforced elastomeric fabric are In particular, it has been recognized that they adversely affect radial or bias tires to which they are coupled. Since the metal reinforcement generally used is short-fiber or cable type steel wire, a tire manufacturer bonds some kind of rubber-soluble cobalt containing a salt into an elastic body to bond the elastic body with an embedded metal reinforcement material. Efforts have long been made to obtain good adhesion to. Where the wire is cut, even if it is coated or plated with brass to resist corrosion or adhesives to promote adhesion, there is an exposed surface on which oxidation begins immediately upon contact with the atmosphere. Although adhesion of chemically clean steel to any elastomer is acceptable, such oxidation should be prevented because the embedded wire does not adhere to the wire upon oxidation of the wire.

In the production of steel banded bias and radial tires, one or more circumferentially facing belts are disposed under the tread material to maintain the shape of the tire when inflated and continuously loaded. The steel reinforcement of these belts is usually arranged at an angle from the longitudinal direction of the belt and at an angle to the plane perpendicular to the axis of rotation of the tire. Thus, when the belt is manufactured, all cut ends of the steel reinforcement are exposed along both sides of the belt. Oxidation of these exposed ends before the belt is coupled to the tire results in continuous side separation of the belt in the tire, in addition to making it difficult for an operator to process such belt.

Side separation of the belt not only causes most of the damage to radial tires, truck tires and off-road tires in passenger cars, but also reduces the number of renewable tires. With tires at distances of 80,500-161,000 km, the ends of these once exposed reinforcements, surrounded by a carcass ply on the bottom and by a tread on the top, do not attach to the elastomer. If the tire continues to be used in a state where the elastic material as well as the steel reinforcement is constantly bent and stretched, the side of the belt eventually breaks away from the carcass ply of the shoulder of the tire. If this is not detected or ignored and the tire is not replaced, such a condition, once started, becomes irreparable and the tire is broken by partly or totally detaching the tread from the body of the tire during high speed continuous travel.

The latter result is not acceptable at all on highways, and in countries where the speed limit is not known, it is common to drive at 161 km / h for several hours, which is likely to lead to catastrophic consequences. The use of tires at high speeds for extended periods of time, as described above, is not very common in the United States, but it cannot be said that it is not necessary to prevent belt side separation of radial tires with steel belts alone.

Oxidation of the exposed ends of the steel wire reinforcement can be minimized by bonding the elastomeric fabric to the tire immediately after the tire is made, or by carefully controlling the environment around the fabric prior to its intended use.

However, such efforts are rarely carried out and it is common for the elastomeric fabric to be stored in warehouses for days to sometimes months before its use, in which oxidation of the exposed wire reinforcement occurs.

One method that has been developed and used to prevent oxidation of exposed wires is calendering a suitable elastomer into a sheet and cutting it into strips to expose the exposed ends of reinforced elastomeric fabrics such as carcass plies or tread belts. To attach. A relatively wide, e.g., 3.75-5.0 cm wide, called cushion gum, about 0.038 cm thick, is attached to one side of the side of the elastomeric fabric and folded to the opposite side and sealed there. However, air cushions inevitably occur on the sides when the cushion rubber is folded on the sides of the fabric, which is difficult to handle and arrange due to the inherent viscosity on both surfaces of the fabric and the rubber. In such places, firstly, the desired adhesion of the steel and the elastic body is not obtained, and secondly, oxidation is not reduced or prevented.

The most practically used adhesion enhancing additives for cushioning rubbers are applied immediately after wire shear where chemically clean steel surfaces are obtained in a short time. However, even if this cushion rubber is occasionally attached to the belt during tire manufacture, it has been found that the breakage of the belt of the tire so produced is significantly reduced after the elastomeric fabric has been stored for a time sufficient to cause oxidation of the exposed wire ends. However, such treatment is not flawless, and the drawback increases the price on both sides of the labor and material, increases the thickness of the ply on the sides, and creates air pockets at the rubberized ends, causing oxidation to occur.

The use of various elastomers demonstrates that no suitable compound is present for calendar processing into thin strips for attaching continuous rubber frames. Despite many attempts, rubber rim attachment is an expensive and lengthy process, and rubber edge formation is a steel-reinforced elastomer for radial truck tires because of the large imbalance between those facts and the benefits obtained by the process. It is limited only to the belt. In view of the advantages of long tire life and stability, it is highly desirable to use a rubber rim attachment process for the production of tires for commercial vehicles and tires for passenger cars.

Another inherent problem with tires is their adverse impact on internal discontinuities, such as areas where hinge points exist.

The hinge point is generally coincident with the end of the belt side and the sharp end of the elastomeric fabric, such as for example the fold end of the ply, the break ply and the end of the shock ply. Recent trends in reducing tire fly, ie two plies and one ply (radial tires) instead of four plies for passenger cars, and four plies, six plies and one ply (radial tires) instead of twelve plies for truck tires Use has been greatly facilitated by using larger diameter reinforcing cords such as 1260/3 instead of 840/2. As a result, the standard dimension of the elastic fabric increased, whereby the hinge point was greatly improved.

The following problem is particularly pronounced for a typical truck tire structure in which several plies are cut to moderate width and then steps are formed. When the ply is folded around the bead area, one side has exposed steps and the other has embedded steps. Fly ends in the folds not only provoke the formation of air pockets, but in buried staircases, they can distort the fly when the bending stress changes drastically.

The plies superimposed above tend to form hinge points and air pockets because they must be severely bent over embedded and exposed steps. Rubber strips can be used to cover the ends of the ply and to flow the elastomer, which has the disadvantage of being costly and prone to forming another stage with the air pocket.

Another ply structure, which is very sensitive to the sharp end of the fabric, is a buried shank ply, which is a partial width ply disposed within the tire body and extending from the central side wall to the central side wall, between the second and third plies. . The ends of such plies have the potential to form torsion, air pockets, hinge points. The use of rubber strips results in sufficient flowing elastomer to eliminate some twisting, but essentially another discontinuity is created.

In addition, a solution for abrupt stage removal of the ply is by rubber rim attachment using methods and apparatus suitable for the use of elastomers of a shape and amount that facilitates movement with little torsion between the ply stage and the upper ply.

Accordingly, it is an object of the present invention to provide a device for the rim of a reinforced elastic body to a fabric, and another object is to attach the rim to the elastic fabric to prevent oxidation of the exposed steel reinforcement.

It is yet another object of the present invention to provide an apparatus for attaching a rim to a fabric such that the reinforcing filament reinforces the adhesion between the contacting elastomer surfaces while eliminating air trapping between the elastomeric end and the elastomer. have.

It is a further object of the present invention to attach the rim to the fabric to remove the sharp end of the ply used in the manufacture of reinforced elastomeric products, in particular tires, the bias tire and to prevent side separation of the belt in the tire when the tire is used. An apparatus for attaching a frame to a reinforcing belt for a radial tire is provided.

It is yet another object of the present invention to provide a device for attaching a rim to a reinforced elastomeric fabric that facilitates the manufacture of new tires and the regeneration of used tires, which is another object. SUMMARY OF THE INVENTION An object of the present invention is to provide a device capable of attaching a rim to a fabric having a more suitable elastomeric composition than that used by the technique, and at the same time performing a rim attachment and controlling the quality and formation of the stage used.

In general, the apparatus having the inventive concept includes a frame, a table for supporting a reinforced elastomeric fabric, at least one compression assembly adjacent the table for attaching a suitable elastomer directly to the ends of the elastomeric fabric, an elastomer Means for moving the fabric onto the table. Another embodiment of the invention includes a frame, support means for an elastomeric fabric, and at least one extrusion assembly adjacent the support means for attaching a suitable elastomer directly to the ends of the elastomeric fabric. A preferred method for attaching the elastomer to the ends of the reinforced elastomeric fabric includes: passing the elastomeric fabric through a support unit, extruding the elastomer through an extruder head, and forming an internal first end compatible with one end of the elastomeric fabric. Imparting, bonding the extruded elastomer to one end of the elastomeric fabric by pressing the extruded elastomer onto almost all of the exposed surface of the fabric.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The device for attaching a rubber frame to a thin, reinforced elastomeric fabric having the concept of the present invention is indicated by numeral 10 as a whole in the accompanying drawings. The apparatus 10 has a rigid base frame 11, the base frame of which the main mechanisms are supported: support tables 12, inner and outer conveying assemblies 13 and 14, inner and outer braking mechanisms 15 and 16, inner and outer Support extrusion assemblies 18 and 19, tension mechanism 20.

The operation of the device will be described in the following description of the components of the device. Apparatus 10 may attach rubber rims to both sides of a sheet-like reinforced elastomeric fabric (FIG. 5) passing in the direction of arrow A. FIG. The fabric may be calendered in a conventional manner or made with an apparatus as described in the applicant's own US Pat.

Now as a description, the support table 12 has a number of individual transport rollers 21 supported in six rows 22-27, each of the roller rows 22-27 having an angle bracket 28 for the support of the rollers 21. have.

Roller rows 22-24 are mounted on the inner conveying assembly 13 having two parallel roller frames 29, 30, and similarly, roller rows 25-27 are parallel roller frames 31, 32 (8th). It is mounted on the outer conveyance assembly 14 which has FIG.

The roller frames 29, 30 of the inner conveying assembly 13 are supported by roller 33 at one end thereof, and the roller 33 is mounted on a suitable bracket 34 fixed to the horizontal frame members 36, 38 which form the upper surface of the frame 11. . The opposite ends of the roller frames 29 and 30 are bolted to the plate 39, and the plate is mounted on the base plates 40 and 41 held directly by the frame members 36 and 38, and moves on the plate. . Similarly, roller frames 31 and 32 have their opposite ends supported by roller 42 (Fig. 8), and the rollers 42 are mounted on brackets 43 attached to horizontal frame members 38 and 44 of base frame 11, respectively. have. The opposite ends of the roller frames 31 and 32 are bolted to the horizontal plate 45, and the horizontal plate 45 is provided on the base plate so as to be movable on the base plates 46 and 48 supported by the horizontal frame members 38 and 44.

The transport assemblies 13, 14 also include axes 50, 51 having handwheels 52, 53, respectively. The shaft 50 passes through the end plate 54 attached at one end to the legs 56, 58 of the frame 11 and the end frame member 55 and at the opposite end is supported by an end plate 60 attached to the end frame member 61. It is accumulating in 59 (FIG. 9). Similarly the shaft 51 for the conveying assembly 14 is engulfed in a bearing 62 which is supported at one end by an end plate 63 attached to the end frame member 64 and passes through the end plate 54 as in axis 50.

A screw groove is formed in at least a portion of the shaft 50, and the shaft 50 is engaged with a block 65 having a screw hole 66 and joined to the lower shaft of the horizontal plate 39 (FIG. 2). The shaft 51 is screwed into the block 68 joined to the lower side of the horizontal plate 45. Thus, by rotating the hand wheels 52 and 53, the transverse plates 39 and 45 of the transport assemblies 13 and 14 reciprocate along the large plates 40, 41, 46 and 48. As shown in the figure, the medial transport assembly 13 and roller rows 22-24 are movable toward and away from the exterior transport assembly 14 by a short distance of about 2.5-5.0 cm, while the outer transport assembly 14 relative to the medial transport assembly 13 And roller rows 25-27 perform a reciprocating motion of, for example, about 75 cm. Thus, the width of the support table 12 can be varied to supply elastomeric fabrics of various sizes, from relatively narrow belt plies to wider body plies. The outer conveying assembly 14 can be quickly arranged in a suitable width, and can thus be fine-tuned by moving the inner conveying assembly 13.

Braking mechanisms 15 and 16 are functionally identical and have two pairs of axes 75-76 and 78-79. The shafts 75 and 76 are connected to the inner conveying assembly 13 and pass through the end plates 54 on both sides of the shaft 50. Handles 80 and 81 are provided to fix or detach the horizontal plate 39 by rotating their axes. The braking axes extend parallel to the conveying assembly axis 50 through the end plate 60 and are held in suitable bearing assemblies 82, 83. Shafts 78 and 79 connected to the outer conveying assembly 14 pass through end plates 54 and 63 with handles 84 and 85 at end plates 54 and are retained in bearing assemblies 88 and 89 at end plates 63.

With reference to FIGS. 2-4 and 10, the details and operation of the braking mechanism 15 will be described. Cams 90 and 91 are provided on braking shafts 75 and 76, respectively, and the cams are fixed non-rotatively to the braking shaft via keys 92 and 93, respectively. The braking shaft 75 has an elongated tall groove 94 that is at least as long as the moving distance of the inner conveying assembly 13. The pair of guide plates 95 and 96 are attached to the lower side of the horizontal plate 39, and the guide plate 95 has the notches 98 and 99 such as the notches 100 and 101 of the guide plate 96. The notches accommodate the inside of the base plates 40 and 41 and act to maintain their alignment when the plate 39 reciprocates. The central portion of each plate is entangled at 102 and 103 to form a passageway for axis 50.

Under the notch 98, the guide plate 95 has a yoke 104 through which the braking axis 75 passes. The second yoke 105 under notch 99 accommodates the braking axis 76. The yoke is provided on the guide plate 96 to accommodate 106 and 108 degrees and also the braking axes 75 and 76, respectively. As shown in detail in FIG. 4, the cam 90 supported on the braking shaft 75 can not pass through either the yoke 104 or 106.

When moving the inner conveying assembly 10, the braking axis handles 80, 81 are arranged as shown in FIG. 2, and the cams 90, 91 are spaced apart from the base plates 40, 41 superimposed thereon. As shown in FIG. 3, by rotating the handles 80 and 81, the cams 90 and 91 engage with the bases 40 and 41, thereby preventing further movement of the inner conveying assembly 13. Unless the cam engages with the base plate, the cam slides along each braking axis by one of the yokes provided on the pair of guide plates.

Cams 109 and 110 are also provided on shafts 78 and 79 of the outer braking mechanism 16 below the outer conveying assembly 14, and the cams are arranged between the pair of guide plates 111 and 112 supported by the horizontal plate 45. The details of the outer braking mechanism 16 will not be described repeatedly because they are structurally identical to the details of the inner braking mechanism 15.

The inner extrusion assembly 18 includes an extruder 120 and an extrusion head 120 held by an ankle bracket 122 secured to a transverse plate 39. The extruder 120 is driven by the motor 123 held by another angle bracket (not shown) attached to the bottom of the diaphragm 30. The belt on the backside of the shroud 124 transfers power from the motor 123 to the reduction gear 125 supported by the angle bracket 122. The extruder 120 may be heated by any conventional method and has a feed port 126 for supplying an elastic body forming a rubber edge. A separate electrical heating element 128 is connected to one side of the extrusion head 121, and a special molding wheel 129 is rotatably and movably fixed to the opposite side thereof, the purpose of which will be described later. A smooth plate 130 is installed in roller row 24 and can be raised or lowered to feed elastomeric fabrics of different thickness passing through the extrusion head 121 and the specially molded wheel 129. The total extrusion assembly 18 is held by the inner carrier assembly 13 and is movable with the assembly 13.

Similarly, the outer extrusion assembly 19 includes an extruder 131, a feed port 132, an extrusion head 133, a heating element 134, a forming wheel 135 and a smooth plate 136. The extruder 131 and the reduction gear 138 are held by an angle bracket 139 fixed to the diaphragm 45 and are driven via the power belt 140 from the motor 141 supported by the bracket mounted on the lower part of the diaphragm 45. The total extruder assembly 19 is movable with the outer conveying assembly 14.

The outer extrusion assembly 19 will be described in more detail with reference to FIGS. 5-7. The extruded elastomer is supplied to the extrusion head 133 via an extrusion screw 142. The heads 133 are of the upper half and the lower half 143 and 144, which are connected to each other by small screws, not shown. The lower half 144 is preferably connected to the mounting bracket 145. The bracket 145 itself is easily attached to the cross section of the extruder 131 by screws, not shown. In addition, since the upper half 143 is connected to the lower half 144, it is easy to clean the extrusion head 133 when the apparatus 10 is not used.

The conical flange 146 extends from the mounting flange 145 and the extrudate passes through the conical flange and reaches the head 133. Each half of the extrusion head has inclined semi-cylindrical passages 147, 148 that are narrowed up to the outlet 149, through which the elastic body is shaped into a predetermined shape, for example as shown in FIG. Each half is machined to fit the conical flange 146. By this structure, a fixed seal is formed between the half portions 143 and 144, and a fixed seal is also formed between each half portion and the mounting flange 145. In operation of the extruder 131, the extrudate is extruded into the passageway through the flanges 145, 146. The tendency for half 143 or 144 to separate from the flange when under pressure is prevented by a fixed engagement between the inclined surface of the flange 146 and the machined surface of the extrusion head. In addition, since the upper half 143 is easily removable at right angles from the lower half 144, cleaning is not prevented.

The removable side forming plate 150 is fixed to the halves 143 and 144 by screws, and the side forming plate 150 is provided with a protruding side 151 which forms a first side in the elastic body that is compatible with the sides of the coated elastic fabric. It is. Protruding edge 151 of any preferred form is a small diameter metal rod 152, one side of which acts to close the exit of the extrusion head to a narrow outlet 149. By using the cylindrical metal rod 152 as described above, a thin ribbon of C-shaped cross section (FIG. 6) can be extruded and applied to the side 153 of the coated reinforcing elastic fabric 154.

The flat recess 155 is formed by grinding the part of the deformable plate 150 and the metal sheet 152. As shown in FIG. 5, the recess 155 guides the fabric 154 and is used for positioning the extrusion assemblies 18 and 19 with respect to the elastic fabric for attaching the rubber side. A slight gap can be maintained between the metal rod 152 and the fabric 154 to prevent premature wear of the metal rod 152 when the reinforcing filaments are made of metal.

The end 157 of the metal rod 152 extends along the outlet 153 at intervals sufficient to direct the extrudate to pass over the forming wheel 135 toward the fabric edge 153, the direction of flow of which is indicated by arrow B in FIG. 5. In this way, it helps to extrude the elastomer into the fabric 153 between all of the reinforcing filaments in the fabric without the formation of fine air pockets by changing the direction of the extrudate.

On the lower side of the lower half 144 of the extrusion head 133, a long flat plate 156 is mounted, the plate 156 extending at some distance to its rear over the entire length of the head 133, and the extrusion head heating element 133 is held on the plate. It provides heat inside the head 133. The foot 158, which extends slightly forward, is joined to the tip 159 of the plate 156 with the slot 160 extending longitudinally. The foot 158 is installed to support the forming wheel 135 over the washer 161 and the spacer 162.

The bolt 163 passes through the hole of the forming wheel 135, the washer 161, the spacer 162, and the slot 160, and is 135 connected to the T-shaped nut 164. The forming wheel 149 moves along the slot 160 away from the extrusion head exit 160, effectively increasing the space between the fabric side and the forming side 165 of the forming wheel 135, as shown by the imaginary line in FIG.

The flat plate 156 also acts as a mounting base for the arm 166 to chuck the lever 167 (FIG. 1). At one end of the lever 167 is mounted a rotatable wheel 168 which engages the reinforced fabric tensioned between him and the smooth plate 136. The tension spring 169 fixed to the lever 167 and the arm 166 presses the wheel 168 downward onto the fabric. The wheel 168 is preferably inclined toward the extrusion head 133 to securely engage the fabric edge to the object to be compressed. Similar construction (not shown) is used for the inner extrusion assembly 18.

In operation of the apparatus 10, the reinforced fabric 154 is stretched onto smooth plates 130, 136 between the extrusion heads 121 and 133. The smooth plates 130 and 136 are adjusted so that the sides 153 of the fabric are substantially coplanar with the molding sides of the molding wheels 129 and 135.

The tensioning mechanism 20 shown in FIG. 8 is used to tension the fabric, which has two rollers 170 and 171 mounted on a pair of vertical supports 172 supported by the base frame 11. The lower roller 171 has a puller 173 driven by a power belt 174 connected to the motor 175, and the motor 175 is mounted to the bracket 176 supported by the vertical support 172.

The counterclockwise rotation of the roller 171 advances the fabric 154 from the support table 12 between the rollers 170 and 171.

Although not shown in detail in the drawings, the rollers 170 and 171 are adjustable away from each other to vary the thickness of the fabric.

Again, as a description of the operation of the apparatus 10, the amount of elastic body extruded to form the rubber side 180 (FIG. 7) is first determined by the distance from the fabric 153 side to the 155, and secondly, the shape side 165 and the fabric 154. Controlled by the interval between. By placing the forming wheels 135 closer to the sides of the fabric than the width of the extrudate, the elastics are extruded to precisely engage the fabric sides as shown in FIG. 7 to contact almost all of the exposed surface of the elastics, in particular the reinforcing filaments. .

Thus, air is hardly trapped between the filaments and no oxidation occurs. In addition, full contact is possible due to close contact between the fabric edge and the extrudate. In addition, forming edge 165 constitutes a second forming surface that imparts the extrudate second outer edge when bonded to the fabric. Since the original form of the extruded ribbon is C-shaped, a portion of the flour passes above and below the fabric edge.

In addition to reinforcing the elastic body to avoid hinge points on the sides of the belt and body ply, a metal or steel reinforcement 188, either a cable or a single strand, is easily surrounded by rubber sides 180 or other appropriately shaped sides. do. The apparatus 10 is applied to an elastomeric fabric 154 reinforced with a plurality of reinforced narrow ribbons 189 sewn to be cut from a continuously extruded ribbon as produced by the apparatus described in US Pat. No. 3,803, 965 described above. Particularly useful. In such a device, the elastomeric fabric extruded from the extruder still has heat when fed across the table 12 of the device 10. In addition, the reinforcing material cutting portion of the steel needs to be exposed to the atmosphere no longer than approximately one minute before accommodating the rubber edge, and thus separating the elastic body from the reinforcing material eliminates the possibility of oxidation.

Another embodiment, indicated by numeral 210, is shown in FIG. 11. The device 210 has a rigid base frame 211, the frame comprising means 212 for supporting the main mechanism, ie reinforced elastic fabric 154, inner and outer conveying canisters 213 and 214, inner and outer extruded canisters 215 And 216 are supporting.

The support means 212 has a cylindrical drum 220, each end is provided with a hub (221). The drum rotating shaft 222 coaxial with the drum 220 fixed to the hub 221 rotates the drum 220. The drum axis of rotation 222 extends the entire length of the drum and the inner shaft end of the axis is supported by a saddle 223 supported by the inner conveying assembly 213. Although the drum axis of rotation is engulfed in a suitable bearing assembly, the use of the saddle 223 facilitates the removal of the drum as described below, since the drum is relatively light and its rotation is slow.

At the shaft end of the drum, the drum rotating shaft 222 is supported by the saddle 224, and the drum rotating shaft is provided with a 225 engaged with the drive gear 226. Drive gear 226 is supported on an axis of rotation with pulley 228.

Drive belt 229 runs from drive pulley 230 around pulley 228. A motor 231, an angle gear 232 and a deceleration gear 233 are installed to drive the drum 220 to drive the driving pulley 230. In operation of the device 210, the fabric 154 passes over the drum 210, and as the drum rotates, the fabric 154 passes through the device 210 in the direction of arrow A '.

Rotation of the drum 220 is carried out by the gears 225 and 226, the motor 231 and the associated parts, although a conventional winding device (not shown and part of the present invention) which winds the fabric into a roll for impersonation, transportation and use. Fabric may be stretched through the device 210 by other means, such as; Thus, the drum 220 is preferably rotatable only when the fabric 154 passes over it.

The inner and outer conveying assemblies 213 and 214 are similar in structure and function to the conveying assemblies 13 and 14 described above in connection with the apparatus 10 and are therefore not described in detail below. In essence, the inner conveying assembly 213 is capable of moving a short distance of 2.5-5.0 cm towards and away from the drum 220, and the outer conveying assembly 214 reciprocates a greater distance, eg 75 cm, above the bases 240, 241.

Shafts 242 and 243 with handwheels 244 and 245, respectively, are held in frame 211 of device 210. Rotating the handwheel 244 reciprocates the inner conveying assembly 213, while rotating the handwheel 245 reciprocates the outer conveying assembly 214. A screw groove is formed in the shaft 242 and is engaged with a block (not shown) extending from the underside of the transport assembly 243 for reciprocating motion, similar to the blocks 65 and 68 described above. Axle 249 supports tooth 249 engaged with tooth 246 supported by outer conveying assembly axis 248, which axis 214 engages a block (not shown) extending from outer conveying assembly 214. Gears 246, 248 are used because the transport assembly axes 242, 243 are too close to each other to hold the hand wheels 244, 245.

The extrusion assemblies 216, 216 are also similar in function and structure to the extrusion assemblies 18, 19 of the apparatus 10, each of which has an extrusion screw driven by a motor (not shown) supported in the frame 211. The extrusion assembly 215 has an extruder 250, a feed port 251, an extrusion head 252 molding wheel 253 and a heating element (not shown), and similarly, the assembly 216 has an extruder 254, a feeding port 255, an extrusion head 256, a molding wheel 258 and heating. It has a device (not shown). Except for the elastic body, other components, the formation of the contour and the attachment of the elastomeric material to the sides of the fabric 154 can be found in detail with reference to FIGS. 5-7. In addition, the extrusion assemblies 18, 19 can be replaced directly instead of the extrusion assemblies 215, 216.

In operation of the apparatus 210, the extrusion assembly moves the distance determined by the desired dimensions of the rubber side to be attached until the 215, 216 mold wheels 253, 258 are located within some distance from the side of the fabric 154. As shown in FIG. 11, the fabric 154 extends slightly beyond the sides of the drum 220 to expose all surfaces of the fabric edge to the extrudate. If it is desired to rim fabrics of different widths, the drum 220 and drum rotation axis 222 can be easily removed by raising them vertically from the saddles 223, 224. Thereafter, other drums and axles can be lowered to a block where gear 225 or another tooth is fixed to shaft 222 when rotation of the drum is required.

As will be apparent to one of ordinary skill in the art, it is possible to manufacture and use drums stretchable instead of the removable drums without departing from the scope of the present invention. However, the removable drum is less troublesome than the flexible drum because it has a simpler structure and fewer mechanical parts than the flexible drum.

Of course, once the size of the new drum has been set and placed, the extruder can be easily placed into the operating position of the device 210 by moving the conveying assemblies 215, 215.

It is therefore evident that the foregoing description of the preferred embodiments achieves the object of the present invention. By means of this apparatus and the preferred method of operation of the apparatus, the reinforcement of elasticity is attached to at least one side in one passage, preferably on both sides, even on the sides of the elastic body that is compatible and nearly extrudable. By the method in which the elastic body is attached, the air pocket causing oxidation of the steel reinforcement or discontinuity between the elastic body and the reinforcement is removed.

In addition, the elastic body edges are attached in a shape that is either impossible or at least impossible with conventional devices. And preferred but very expensive or difficult to attach elastomers can be attached easily and with little waste by the present invention.

Claims (1)

CLAIMS 1. An apparatus for attaching an elastic body to at least one elongated end of a laminar fabric, said apparatus comprising: a frame; Means mounted to said frame to support a moving piece of fabric; A semi-cylindrical passage that can be laterally disposed adjacent to the side edge of the thin fabric to which the elastic agent is to be attached and inclined to the outlet, and extends in the passage by a considerable distance along the passage and forms an outlet at the distal end; At least one extrusion assembly mounted on the frame with a forming edge that provides a surface of the compressed object C to be discharged from the outlet into the atmosphere; A mold mounted adjacent to the exit of the extrusion assembly to force the compressed object to engage the lateral side of the fabric with the C-shaped surface surrounding the lateral side of the fabric, and impart an outer surface to the compressed object Edge device to a reinforced elastomeric structure, characterized in that it comprises a wheel having a surface.

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