JPS6014698B2 - Apparatus and method for hemming reinforced elastomeric structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] The present invention relates to a machine for attaching hems to reinforced elastomeric structures (hereinafter referred to as a "rubber hem attaching column") and a machine for attaching hems to such elastomeric structures. Regarding the method for attaching.

With the exception of modern cast elastomer technology, which does not require reinforcement, commonly used elastomers, such as rubber, retain their original shape during the processing steps necessary to obtain the desired product and during normal use. It does not have the inherent strength to ultimately function as an acceptable product when submitted. Accordingly, elastomers have been reinforced by the inclusion of monofilament or multifilament fibers which are much less extensible, in the form of sheets, commonly referred to as "reinforced elastomeric structures." These fibers, or reinforcing cords, can be made of materials such as cotton and synthetic materials such as rayon, nylon, aramid, polyaramid, polyester, glass fibers, and metal wire, especially steel in single strand or cabled form. including. Calendering is a historical method for manufacturing reinforced elastomeric structures, particularly for tire plies. When the elastomer is rolled, the reinforcing cords are oriented parallel to the length of the lamellar elastomer emerging from the calender rolls. Therefore, when the reinforced elastomer structure is incorporated into a tire, it can be tilted relative to the longitudinal reinforcing strands in order to mirror the reinforcing cord at an angle or perpendicular to the surrounding reference plane. It is necessary to make it oblique at a right angle or at a right angle. More recently developed equipment for producing reinforced elastomeric structures also produces relatively narrow reinforced bongs.

Specifically, such narrow ribbons are cut into strips of predetermined length, which are then joined and stitched to form a structure of the desired width. The reinforcing strands are then oriented at an angle or at right angles to the longitudinal direction of the structure. Apparatus suitable for manufacturing structures in this manner is disclosed in U.S. Pat.
803965. Irrespective of the equipment and method used, i.e. whether reinforcing or integrating strips of bongs or calendering, when the reinforcing fibers are metallic, along the cut edge of the reinforced elastomeric structure. It has been recognized that exposed reinforcement edges have an adverse effect on the product, particularly when it is incorporated into a radial or bias tire.

Since the commonly used metal reinforcements are monofilament or cable-like steel wire, tire manufacturers have developed metal reinforcements that are embedded with the elastomer by placing some type of rubber-dissolved cobalt containing salt inside the elastomer. Efforts have been made for many years to improve the adhesion between reinforcement materials. Although the wire may be plated with pine to prevent rust at its cut point or coated with an adhesion agent to enhance adhesion, there is an exposed surface that begins to oxidize immediately upon contact with the atmosphere. Although adhesion of some elastomers to clean steel is acceptable, such oxidation must be avoided because the elastomer in which the wire is embedded will not adhere to the wire if the wire is oxidized. In the manufacture of bias and radial tires, one or more circumferential belts are placed under the tread stock to maintain the tire's shape when subjected to inflation and successive fills. .

The steel reinforcements in these belts are typically arranged at an angle from the longitudinal direction of the belt and, in turn, at an angle to a plane perpendicular to the axis of rotation of the tire. Therefore, when the belt is manufactured, all cut edges of the steel reinforcement are exposed along both sides of the belt. Oxidation of these exposed ends before the belt is incorporated into the tire, in addition to making it difficult for personnel to handle such belts, can result in subsequent separation of the belt ends within the tire. Belt edge separation is currently responsible for the majority of failures in passenger radial, truck, and non-road tires, as well as reducing the number of tires that can be retreaded. .

50,000 to 100,000 miles (80,500 to 1
During use of the tire at a distance of 61,000 ships, the edges of these once exposed reinforcements, surrounded by the carcass ply below and the tread above, do not adhere to the elastomer.

If the tire continues to be used with the steel reinforcement and elastomer constantly being flexed and stretched, the end of the belt will eventually separate from the tire shoulder force-cass ply. If this goes undetected or ignored and the tire is not replaced, this condition once started is irreparable and may result in partial or total separation of the tread from the body of the tire during continuous high speed use. The tire will be damaged. This last result is completely unacceptable on highways, but in countries where speed limits are not posted, it is not uncommon for cars to be driven at 100 mph for hours on end, promoting the aforementioned damage. In the United States, the above-mentioned damage occurred to a considerable extent on passenger car tires.

Although it may not be possible to use tires at high speeds for long periods of time as described above in the United States, where the inventor resides, this fact alone prevents separation of the belt ends of radial tires with steel belts. That doesn't mean it's not necessary. Oxidation of the exposed ends of the steel wire reinforcement may be minimized by incorporating the structure into the tire immediately after its manufacture or by carefully controlling the environment surrounding the structure prior to its intended use.

However, such efforts are rarely practical, and structures may still be stored in warehouses for days or even months before their use. It is during this period that oxidation of the exposed wire reinforcement occurs. One method that has been developed and utilized to avoid oxidation of extruded wire is to calender a suitable elastomer into a sheet, cut strips from this, and attach this to a reinforced material such as a carcass spry or tread belt. It is attached to the exposed edge of the elastomeric structure. Such strips, referred to as cushion rubber, are relatively wide, e.g. 3.75 to 5.0 skin wide, and approximately 0.038 cm thick, and are placed on one side of the edge of the structure. It is attached and then folded over to the other side and sewn there. However, when the cushion rubber is folded back over the edge of the structure, the inherent viscosity of both the structure and rubber surfaces prevents air pockets from forming at the edges due to boxy handling as well as alignment. In this passage, the first
Second, the desired adhesion between the steel and the elastomer is not achieved, and secondly, oxidation is neither reduced nor prevented. The adhesion enhancing additives most practically used in cushion rubber are added immediately after wire scaling, when a chemically clean steel surface appears for a short period of time.

This cushion rubber is finally attached to the belt during tire manufacture, but after the cross-section has been stored for a period long enough to cause oxidation of the ends of the rolled wire, the belt of tires manufactured in this way is Although damage is fairly rare, it is discovered. The process is not without its drawbacks. The disadvantages of this are increased cost in both labor and materials, increased ply thickness at the edges, and air pockets in the rubberized edges that can cause oxidation. However, with the use of various elastomers, there is no more suitable compound to be calendered into thin strips for the subsequent rubber hemming process.
This has been proven. Despite many attempts by the industry, rubber hemming remains an expensive and time consuming process. These facts and the great disparity between the benefits obtained by this process have limited rubber hedding only to steel reinforced elastomer belts for radial truck tires. Considering the long tire life and safety benefits, the rubber edging process is highly suitable for use in the production of all types of tires, including commercial military tires, such as truck tires, non-road vehicle tires, and passenger tires. desirable. Another problem unique to tires is their negative impact on internal discontinuities, such as areas where cross-linking points exist.

The point of mismatch coincides with the abrupt end of a structure, such as the end of a turn in a ply, the end of a break ply and a shock bly, and the end of a belt. Recent trends in reducing tire plies, i.e., using 2-ply and 1-ply instead of 4-ply passenger (radial) tires, and 4-ply instead of 12-ply for many sizes of truck (radial) tires; Use 6 ply, 1 ply, hammer 0
This was greatly facilitated by the use of larger diameter reinforcing cords such as 1260 mm instead of 1260 mm. As a result, the standard dimensions of elastomeric structures have increased, which in turn has greatly improved the mating points. The following problems are particularly pronounced in typical truck tire construction where several plies are cut to a common width and then stepped. When the ply is folded back around the bead portion, one side has an exposed step and the other side has a filled step. The ends of the ply in the folded section not only create the potential for air pockets to form, but also, in the case of buried steps, create the potential for warping the ply when bending stresses change rapidly. The overlying plies form interlocking points and tend to form air pockets as they must turn sharply over the buried and exposed steps. Rubber strips can be used to cover the woven portion of the brai and to flow the elastomer, but this has the drawbacks of being expensive and tending to form air pockets and separate edges. Another braai that is very sensitive to sharp edges in structures is buried shock ply.

This ply is located inside the body of the tire and extends from center sidewall to centerside wall, being a partial width ply between the second and third plies. The edges of such plies can warp and form air pockets and kinks. Although the use of rubber strips provides an elastomer that is sufficiently fluid to eliminate significant distortion, it inherently creates additional discontinuities.
Again, the solution to removing an abrupt end of a ply is to use suitable equipment and a shape and amount of elastomer to facilitate movement with little distortion between the end of the ply and the overlying ply. There may be rubber hem attachment using the method.

[Summary of the invention]

Accordingly, it is an object of the present invention to provide an apparatus and method for hemming reinforced elastomeric structures.

Another object of the invention is to hem structures to eliminate oxidation of exposed steel reinforcement.

Yet another object of the invention is to provide a structure in which the adhesion between the edge to which the elastomer is applied and the contacting elastomer surface is strengthened with suitable reinforcing filaments while eliminating the entrapment of air in the elastomer. It is to attach an IJ to the Yet another object of the invention is to hem structures so as to substantially eliminate sharp edges of plies subsequently used in the manufacture of reinforced elastomeric products, particularly tires. be. Yet another object of the present invention is to provide an apparatus and method for hemming reinforcement belts for bias and radial tires so as to substantially eliminate belt edge separation within the tire during the life of the tire. be.

Yet another object of the present invention is to provide an apparatus and method for hemming reinforced elastomeric structures that facilitates the manufacture of new tires and the quality retreading of used tires.

It is a further object of the present invention to hem structures having more suitable elastomer compositions than those utilized by conventional rubber heeling techniques, and to do so at a lower cost.
and to control the quality and shape of the edges used.

The foregoing and other objects are achieved by the means hereinafter described.

Generally, an apparatus having the concepts of the present invention includes a frame, a table supporting a reinforced elastomeric structure, and at least one extrusion assembly adjacent the table for applying a suitable elastomer directly to the edge of the elastomeric structure. , and means for moving the elastomeric structure over the table.

One embodiment includes a frame, a means for supporting the elastomeric structure, and at least one extrusion assembly adjacent the support means for applying a suitable elastomer directly to the ends of the elastomeric structure. A preferred method for applying elastomer to the ends of a reinforced elastomeric structure includes passing the elastomeric structure over a support means;
forming an elastomeric structure by extruding the elastomer through a head, providing an interior first end compatible with one end of the elastomeric structure, and pressing the extruded elastomer onto substantially all of the exposed surface of the elastomeric structure. the step of bonding to one end of the . The invention further provides a second extrusion assembly.

This, together with the first extrusion assembly, deposits the elastomer on opposite ends of the elastomeric structure passing between the assemblies. DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus for attaching rubber edges to laminated reinforced elastomeric structures having the inventive concept is designated generally by the numeral 10 in the accompanying drawings.

The device 10' has a rectangular base frame 11 from which the main mechanism, namely the support table 1, is connected.
2. Inner conveying assembly 13, outer conveying assembly 14, inner brake lateral 15, outer brake mechanism 16, inner extrusion assembly 18
, an outer pusher assembly 19, and a tensioning mechanism 20 are supported. The operation of device 10 will be described in detail following a description of its components. The ends of the rubber can be attached to both sides of the laminar reinforced elastomer structure (FIG. 5) which passes through the apparatus in the direction of arrow A. This structure may be conventionally calendered or
803,965 and can of course be reinforced with commonly used filaments. Returning now to a description of the parts of apparatus 10, support table 12 is comprised of eight columns held in six rows 22-27.
It has a plurality of U conveyance rollers 21.

Each roller row 22-27 includes an angle bracket 28 for supporting roller 21. Roller row 22-2
4 is attached to an inner carrying assembly 13 comprising two parallel roller frames 29,30. Similarly, roller rows 25-27 are attached to outer transport assembly 14, which includes parallel roller frames 31, 32 (FIG. 8).
Roller frames 29 and 30 of inner transport assembly 13 are supported at one end by rollers 33. 0-ra 3
3 are attached to suitable plackets 34 fixed to horizontal frame members 36, 38 forming the upper surface of base frame 11.

The opposite ends of roller frames 29 and 30 are bolted to cross plate 39. The cross plate 39 rides on and moves on floor plates 40, 41 which are carried directly by the frame members 36 and 38. Similarly, roller frames 31 and 32 are supported at opposite ends by rollers 42 (FIG. 8). The roller 42 is the base frame 11
The bracket 4 is fixed to the horizontal frame member 38 of
It is attached to 3. Roller frames 31 and 32 are bolted to a cross plate 45 at opposite ends. The transverse plate 45 extends over the floor plates 46, 481, which are carried by the horizontal frame members 38 and 44, and can be moved over these plates. The transport assembly 13 and the quantity 4 each have a handlebar flea 2
, 53 including shafts 50, 51.

One end of the shaft 50' passes through an end frame section 55 and an end plate 54 fixed to the legs 58, 58 of the frame turtle 1. The opposite end of shaft 5M is mounted in a suitable bearing 59 (FIG. 9). The bearing 59 is retained by an end plate 68' fixed to the end frame member 61. The shaft 51' for the outer carrying assembly 14 is similarly mounted in a bearing 62 and, like the shaft 50, passes through the end plate 54. The bearing 62 is connected to the end frame member 64
It is held by an end plate 63 fixed to. At least a portion of the shaft 50 is threaded, and the shaft 50 has a threaded hole 66 and a horizontal plate 39 (FIG. 2).
It engages with a block 65 welded to the lower side of.

The shaft 51 is a block 6 welded to the lower side of the horizontal plate 45.
It is screwed into 8. Thus, by rotating the handle wheels 52 and 53, the cross plate 39 of the inner carrying assembly 13 and the cross plate 45 of the outer carrying assembly 14 reciprocate along the floor plates 40, 41, 46 and 48. As shown, the inner conveying assembly 13 and rows of rollers 22-24 are approximately 1-2 inches.
．． 5-5. The reciprocating distance of the outer conveying assembly 14 and the roller rows 25-27 relative to the inner conveying assembly 13 may be greater, e.g., about 30 inches (7& ). In this manner, the width of support table 12 can be varied to accommodate a number of different sized elastomer structures, from relatively narrow belt plies to wide body plies. Fine adjustments can be made by quickly positioning the outer carrying assembly 14 to the approximate width and then moving the inner carrying assembly 143. Brake machines 15 and 16 are functionally identical and have paired shafts 75-76 and 78-79.

Shafts 75 and 76 are connected to inner carrying assembly 13 and pass through end plate 54 on opposite sides of shaft 50. Handles 80 and 81 are provided for turning these shafts to tighten or loosen the cross plates 39. Shafts 75-79 extend parallel to shaft 50 of the carrier assembly and pass through end plate 60 and are retained in suitable bearing assemblies 82 and 83. Shaft 7 connected to outer carrying assembly 14
8 and 79 pass through end plates 54 and 63 which are provided with handles 84 and 85 at end plate 54 and are held in bearing assemblies 88 and 89 at end plate 63. The details and operation of the inner brake mechanism 5 will be explained with reference to Figures 2-2 and 0. Each of the shafts 75 and 76 is provided with a cam 90, 91, and these cams are fixed non-rotatably via keys 92 and 93. Shaft 75 has an elongated keyway 94 having a length at least as long as the distance traveled by inner carrying assembly 13 . A pair of guide plates 95 and 96 are fixed to the lower side of the horizontal plate 39. The guide plate 95 has notches 98 and 99 similar to the notches 00.101 of the guide plate 96. These notches accommodate the inside of the floorboards 40 and 41 and
9 serves to maintain its alignment when it reciprocates. The central part of each plate is bridged by quantities 02 and IQ3, and shaft 5
A passage for 0 is formed. Below the notch 98 the guide plate 95 holds a frame 104 through which the shaft 75 passes.

A second frame 105 below the notch 99 receives the shaft 76. Frames 106 and 108 are also provided on guide plate 96 and receive shafts 75 and 76, respectively. As clearly shown in FIG. 4, cam 90 supported on shaft 75 cannot extend beyond either frame 104 or 106. When moving the inner transport assembly 13,
Handles 80 and 81 are arranged as shown in FIG.
It is separated from 1. By rotating handles 80 and 81 as shown in FIG. 3, cams 90 and 91 are brought into engagement with floor plates 40 and 41, thereby preventing further movement of inner carrying assembly 13. Ru. As long as the cams do not engage the floor plate, the cams are slid along their respective shafts by one of the frames provided on the pair of guide plates. Outer brake machine 16 below outer carrying assembly 14
cams 109 and 110 on the shafts 78 and 79, respectively.
is provided.

The cams 109, 110 are arranged between a pair of guide plates 111 and 112 which are held by the cross plate 45. The details of the outer brake mechanism 16 are structurally identical to the details of the inner brake base 15 and will not be described again.
The inner extruder assembly 18 is held by the extruder 1 by an angle bracket 122 fixed to the cross plate 39.
20 and an extrusion head 121.

Extruder 120 is driven by a motor 123 carried by another angle bracket (not shown) secured to the underside of cross plate 39. A belt behind the protection plate 124 transmits power from the motor 123 to the reduction unit 125. The reduction unit is also an angle bracket 1
It is held by 22. Extruder 120 is heated in a conventional manner. The extruder 120 has a supply port 126 through which the elastomer forming the end of the rubber is fed. A separate electric heating element 128 is connected to one side of the head 121, and a special molded ring 129 is rotatably and movably fixed to the opposite side. The purpose of this will be discussed later. Smooth plate 130
are provided in a row of rollers that are raised and lowered to feed elastomeric structures of different thicknesses passing in front of an extrusion head 121 and a special forming wheel 129. The entire inner pusher assembly 18 is held by and movable with the inner transport assembly 13. In the same machine, the outer extrusion assembly 19 is connected to the extruder 13.
1, supply port 132, extrusion head 133, heating element 13
4, including a forming ring 135 and a smooth plate 136;

The extruder 131 and reduction unit 138 are held by an angle bracket 139 fixed to the cross plate 45 and are driven by a motor 141 via a power belt 140. The motor 141 is held by a bracket attached to the lower surface of the horizontal plate 45. The entire outer pusher assembly 19 is movable with the outer transport assembly 14. The outer extrusion assembly 19 will be described in more detail with reference to FIGS. The elastomer to be extruded is fed to the head 133 via an extrusion screw 142. The head 133 consists of an upper half 143 and a lower half 144, which are connected by machine screws (not shown). Preferably, the lower half 144 is connected to a mounting flange 145. The flange 145 itself is easily attached to the end of the extruder 131 with screws not shown. Next, the upper half 14
3 is connected to the lower half 1.44, cleaning of the head 133 is facilitated when the device 10 is not in use. A conical flange 146 extends from the mounting flange 145 through which the extruded elastomer reaches the head 133.

Each half of the extrusion head 133 has generally semi-cylindrical passageways 147 and 148 that taper to an outlet 149. The elastomer is forced through these passageways into a predetermined shape, such as a circle as shown in FIG. Each half is machined to iron a conical flange 146 at the entrance to the passageway. This construction provides a vertical seal between upper half 143 and lower half 144 and also provides a clamping seal between each half and mounting flange 145. During operation of extruder 131, extruded elastomer is forced through flanges 145 and 146 into the passageway. The direction in which the upper half 143 or the lower half 144 can separate from the flange when pressure is applied is at the flange 146.
and the machined mating surface of the head. Cleaning is also easy since the top half 143 can be easily removed at right angles from the bottom half 144. A removable edge forming plate 150 is secured to the upper half 143 and lower half 144 by screws.

The end forming plate 150 is provided with a projecting end 151 which forms a first end of the elastomer that is compatible with the end of the elastomeric structure to be coated. The protruding end 151, which can be of any desired shape, is a small diameter metal rod 1 as shown.
52, the one side of this rod serves to close the mouth of the extrusion head to the narrow outlet 149. By using the cylindrical rod 152 as previously described, a thin ribbon of approximately C-shaped cross section (FIG. 6) is extruded. This is the end 1 of the reinforced elastomer structure 154 to be coated.
It was confirmed that it is particularly compatible with 53. Flat recess 155
is formed on the end forming plate 150 and a part of the rod 152 by grinding. As shown in FIG. 6, the recesses 155 are used to guide the elastomeric structure 154 and to position the extrusion assemblies 18, 19 relative to the elastomeric structure for generally attaching the rubber ends. . A slight air gap between rod 152 and structure 154 is maintained to prevent premature wear of rod 152 when the reinforcing filament is metal. The end 157 of the rod 152 is such that the elastomer separates from the forming ring 135 and connects directly to the end 153 of the structure.
Stretching along the exit far enough to get you there.

This flow is indicated by arrow 8 in FIG. This orientation of the elastomer greatly assists in pushing the elastomer into the ends 153 of the structure between all the reinforcing filaments inside the structure without the formation of minute air pockets. An elongated flat plate 156 is attached to the lower surface of the lower half 144 of the head 133.

This plate 156 extends over the entire length of the head 133 and also extends a distance behind it, in which the heating element 134 for the extrusion head is held. heating element 13
4 applies heat to the inside of the head 133. A foot 158 extending a short distance forward is welded to the tip 159 of the plate 156 in a longitudinally extending groove 160. Foot part 1
58 is provided to support the molding wheel 135 resting on the washer 161 and the spacer 162. bolt 163
passes through the hole in the forming ring 135, the washer 161, the spacer 162 and the groove 160, and is connected to the T-shaped nut 164. As the forming ring 135 is moved away from the extrusion head outlet 149, the space between the forming end 165 of the forming ring 135 and the edge of the structure actually increases, as shown in phantom in FIG. do. Flat plate 156 also serves as a mount for arm 166 to which lever 167 (FIG. 1) is pivoted. A rotatable wheel 168 is attached to one end of the lever 167.
is mounted and the wheel engages a reinforced structure stretched between it and the smooth plate 136. Tension 169 fixed to lever 167 and arm 166 is connected to wheel 16
Push 8 downward into the structure. The wheels 168 are preferably beveled toward the extrusion head 133 to ensure that the ends of the structure are mated to the extruded elastomer.
The same configuration is used for the inner extrusion assembly 18. During operation of the bagger 10, the reinforced structure 154 is pulled over the smooth plates 130, 136 between the extrusion heads 120 and 133.

Smooth plates 130, 136 are adjusted to bring end 153 of structure 154 approximately in the same plane as the former of forming wheels 129, 135. A tensioning mechanism 20, shown in FIG. 8, is used to tension the structure. This mechanism consists of a pair of vertical supports 1 held by a base frame 11.
It has two loaves 170, 171 attached to 72. The lower roller 171 has a pulley 173 driven by a power belt 174 connected to a motor 175. Motor 175 is mounted by bracket 176 which is carried by vertical support 172. When the roller 171 is rotated counterclockwise, the structure 154
advances from support table 12 between rollers 170 and 171. Although not shown in detail in the drawing, roller 1
70 and 171 are adjustably spaced apart from each other to vary the thickness of structure 154. Returning to the description of the operation of the apparatus 10, the amount of elastomer extruded to form the rubber end 180 (FIG. 7) depends first of all on the distance of the recess 155 from the end 153 of the structure. Second, it is controlled by the distance between forming edge 165 and structure 154.

By placing the molding 135 closer to the edge of the structure than the width of the extruded elastomer, the elastomer is forced to precisely engage the edge of the structure as shown in FIG. Almost all of its exposed surface has been damaged.
Especially in contact with reinforcing filaments. In this way, almost no air is trapped between the filaments and oxidation is avoided. Furthermore, because the extruded elastomer is in close proximity to the edges of the structure, there can be total adhesion.
Molder 165 provides a second molding surface that provides a second outer mold to the extruded elastomer that is bonded to the structure.
Because the initial shape of the extruded pong is C-shaped, some of it goes over and under the edges of the structure. In addition to reinforcing the elastomer to avoid future mating points at the ends of the belt or body ply, cable-like or single strand metal reinforcement 188 is provided at the ends of the rubber 180.
or other suitably shaped edges.

The device 10 comprises a plurality of reinforced narrow ribbons 189 that are successively extruded or cut from a pom and subsequently sewn together, as manufactured by the bag straightening method described in the aforementioned U.S. Patent No. 03,965. It is particularly useful for reinforced elastomeric structures 154 consisting of.

In such an apparatus, the elastomeric fabric extruded from the extruder is still warm as it is fed across the table 12 of the apparatus 10. Additionally, the cut ends of the steel reinforcement need not be exposed to the atmosphere for more than approximately one minute before receiving the rubber ends. In this way, the possibility of oxidation, which could cause the edges of the elastomer to separate from the reinforcement, is eliminated. Referring now to FIG. 11, another embodiment of the present invention is designated generally by the numeral 210.

The bag straight 210 has a long base frame 211 from which the main mechanisms, namely the support means 212 of the reinforced elastomeric structure 154, the inner carrying assembly 2
13, outer conveying assembly 214, inner extrusion assembly 215
, outer extrusion assembly 216. The support means 212 has a cylindrical drum 220.

A boss 221 is provided on each side. A drum shaft 222 fixed to the boss 221 and coaxial with the drum 220 is connected to the drum 2
Rotate 20. The drum sea bream 222 extends beyond the entire length of the drum. The inner end of the drum shaft 222 is supported by a saddle 223 which is carried by the inner carrying assembly 213. Although the drum ball could be pivoted on a suitable bearing assembly, the relatively light weight of the drum and its slow rotation allows for the use of a saddle 223 to facilitate removal of the drum, as will be explained later. . The drum shaft 222 is also supported by a saddle 224 at the outer end of the drum.

The drum steel 222 is also provided with a gear 225 that meshes with a drive gear 226 . The gear 226 is held on a shaft with a pulley 228 and the drive belt 229 is attached to a drive pulley 230.
from the pulley 228. Drive pulley 230
A motor 231 is used to drive the drum 220 to rotate the drum 220.
, an angle gear 232 and a reduction gear 233 are provided. During operation of device 210, structure 154 is attached to drum 21.
0, and when this drum is rotated, structure 1
54 travels through apparatus 210 in the direction of arrow A'. Rotation of drum 220 was provided by gears 225, 226, motor 231 and associated components, although conventional hoisting equipment (not shown and not included herein) for pulling the structure into rolls for later storage, transportation and use is provided. (does not form part of the invention)
The pickled vegetables can be pulled through the device 210 by other means, such as by other means. In this way, the structure 154 need only be rotatable as it passes over the drum 22. Inner carrying assembly 213 and outer carrying assembly 2
Reference numeral 14 indicates the assemblies 13 and 14 described in connection with the mounting 101.
Since the structure and function are the same, we will not explain them in detail here.

Basically, the inner carrying assembly 213 is 1-2 inches (2.
5-5. The reciprocating motion of the outer carrying assembly 214 on the floor plates 240 and 241 can be greater distances, such as 30 inches (75 inches), toward or away from the drum 220. Frame 2 of device 210
What is held inside each of the 11 is a steering wheel 2.
44,245 and brazed shafts 242,243.

Rotating the wheel 244 causes the inner carrying assembly 213 to reciprocate, while rotating the wheel 245 causes the outer carrying assembly 214 to reciprocate. Shaft 242 is threaded to allow transport assembly 21 for reciprocating motion.
3 and engages with blocks (not shown) similar to the blocks 65 and 68 described above. shaft 243
carries a gear 246 meshing with a gear 248 carried by a shaft 249 of the outer carrying assembly. Gears 246 and 248 are used to hold handle wheels 244 and 245 on shaft 242,
249 are too close to each other. The extrusion assemblies 215 and 216 are also the extrusion assembly 1 of the apparatus 10.
8 and 19 have the same structure and function.

Each has an extrusion screw driven by a motor (not shown) held within the frame 211. Inner extrusion assembly 215 includes an extruder 250, an extrusion head 251, an extrusion head 252, a molding device 253, and a heating element (not shown). Similarly, outer extrusion assembly 216 includes an extruder 254, a feed port 255, an extrusion head 256, a forming ring 258, and a heating element (not shown). See Figures 5-7 for the removal of the elastomer, contouring, and attachment of the elastomer to the edges of structure 164. Note that the extrusion assemblies 18 and 19 are directly extrusion assembly 215.
, 216 directly. During operation of the apparatus 210, the extrusion assemblies 215, 216 are connected to the extrusion assemblies 253 and 258.
is moved a distance predetermined by the desired length of the end to be attached until it is located a short distance inside the end of structure 154.

As shown in FIG. 11, structure 154 extends slightly beyond the end of drum 220 to expose the entire surface of the end of drum 220 to the elastomer. When attaching structures of different widths, attach them to the saddle 223.
drum 22 by lifting vertically from and 224.
0 and the drum shaft 222 can be easily removed. If it is desired to rotate the drum, then gear 2
Another drum and shaft can be lowered into the block where 25 or other gears are fixed to the shaft. As will be apparent to those skilled in the art, telescoping drums may be constructed and used in place of the removable drums described above without departing from the scope of the invention.

However, since removable drums have a simpler structure and fewer mechanical parts than retractable drums, they are less prone to failure than retractable drums. Of course, once the new drum is sized and placed, the extrusion assembly 21
By moving the extruder 5,216, the extruder is easily placed in the operating position of the diamond 210. Thus, from the foregoing description of the preferred embodiments, it is clear that the present invention achieves its objectives.

By means of the apparatus according to the invention and the preferred method of its operation, nearly any extrudable elastomer end compatible with the end of the reinforced elastomeric structure can be attached to at least one end, preferably both ends, in one passage. Ru. The manner in which the elastomer is applied avoids oxidation of the steel reinforcement or air pockets that create discontinuities between the elastomer and the reinforcement. Additionally, the edges of the elastomer are deposited in shapes that were previously not possible or at least impractical in conventionally mounted hawks. And, elastomers that are desirable but extremely expensive or perhaps difficult to deposit can be easily deposited with the present invention and with little or no waste.

[Brief explanation of the drawing]

In FIG. 1, a portion of the bag through which the laminar reinforced elastomer structure carrying the concept and method of the invention passes through the apparatus has been removed for clarity. FIG. 2 is a partial cross-sectional side view of a portion of the rhombus of FIG. 1 illustrating the brake mechanism of one of the two movable pusher assemblies; FIG. 3 is approximately line 3--3 of FIG. 4; FIG. 4 is a partial vertical cross-sectional view taken approximately along line 4--4 of FIG. 2; FIG. 5 is a partial cross-sectional top view of one of the extrusion heads; FIG. 2 is a front view of the extrusion head and a cross-sectional view of the reinforced elastomer structure in position to receive the rubber end; FIG. FIG. 7 is a view similar to FIG. 6 illustrating the layering and preforming of the rubber edge along one end of the elastomeric structure;
Figure 8 is a side view of the entire device to explain the tension mechanism;
Figure 10 is a plan view of the device according to the invention with parts of the support table, pusher assembly and conveyor assembly removed to show details of the brake machine and conveyor assembly axis; Figure 10 is a schematic perspective view of the brake machine; FIG. 11 is a perspective view of another embodiment for hemming laminated reinforced elastomeric structures having the concept and method of the present invention. 10...
...Device, 11...Base frame, 12...
...Support table, 13 ...Inner transport assembly, 14
......Outer transport assembly, 15...Inner brake mechanism, 16...Outer brake machine side, 18...
Inner extrusion assembly, 19... Outer extrusion assembly, 2
0... Tension mechanism, 21... Conveyance roller, 39
...Horizontal board, 40,41...Floor board, 50,5
1...Shaft, 90,91...Cam, 1
20... Extruder, 121... Extrusion head, 129... Molding ring, 131...
・Extruder, 133...Extrusion head, 135...
...Forming theory, 142...Extrusion screw, 14
7,148...Passway, 149...Outlet, 150...End forming plate, 151...Protruding end, 154...Reinforced elastomer Structure,
157... end, 165... forming end, 1
80... End of rubber, 188... Reinforcement material, 189... Ribbon, 210... Device, 211... Base frame, 212...・・・・・・
Support means, 213. ．． ．． ...Inner carrying assembly, 214
...Outer conveying assembly, 215...Inner extrusion assembly, 216...Outer extrusion assembly, 22
0...Drum, 222...Drum shaft, 22
3,224...saddle, 250...extruder, 252...
...Extrusion head, 253... Molding theory, 254...
... Extruder, 256 ... Extrusion head, 2
58... Molded ring. FIG. l FIG2 FIG. 3 FIG. 4 FIG. 5 FIG. 6 FIG. 7 FIG. 8. FIG. 9 FIG, l0 FIG. 1l

Claims (1)

Claims: 1. A device for applying an elastomer to at least one elongated end of a lamellar structure, comprising a frame, means attached to the frame for supporting a moving piece of the structure, an elastomer at least one extrusion assembly attached to said frame having a semi-cylindrical passageway tapering to an outlet disposed laterally adjacent said end of the lamellar structure to which is attached; means associated with the outlet for imparting a C-shaped surface to the elastomer extruded from the outlet, and engaging the end of the structure such that the C-shaped surface surrounds the end of the structure; a wheel mounted proximate the outlet of the extrusion assembly to cause mating, the wheel having a shaped surface bearing a second outer end of the extruded elastomer;
Apparatus characterized in that the forming surface is disposed dimensionally closer to the end of the structure than the dimension of the elastomer passing therebetween. 2. The device according to claim 1, further comprising:
a forming plate attached to the extrusion assembly adjacent the end of the structure, and a considerable distance within the passage for forming the C-shaped surface in the elastomer exiting the outlet to the atmosphere; a molded end extending from said molded plate, said molded end also folding the elastomer back toward said end of said structure. 3. In the device according to claim 1, further:
a second extrusion assembly and at least one transport assembly movable on the frame toward and away from one extrusion assembly and holding the other extrusion assembly. 4. The device according to claim 3, further comprising:
a second transport assembly movable over said frame and holding said one extrusion assembly; 5. The device according to claim 1, wherein the support means includes a drum shaft held by the frame, a cylindrical drum rotatably held by the drum shaft, and a drum for easy insertion and removal. Means for accommodating structures of various widths by rotatably supporting said drum shaft. 6. A method for depositing an elastomer on an edge of a reinforced elastomeric structure, comprising the step of passing the elastomer structure through a helical attachment device, extruding the elastomer through an extrusion head and attaching a second material compatible with the edge of the elastomeric structure. and bonding the elastomer to an edge of the elastomeric structure by pressing the elastomer against substantially all of the exposed surface of the elastomeric structure. 7. The method of claim 6, wherein the bonding step uses a rotatable wheel having an end spaced apart from one end of the elastomeric structure to reduce the width of the extruded elastomer to the A method performed by increasing the distance between the edge and the elastomeric structure. 8. In the method according to claim 7, further:
A method comprising forming a second end on the elastomer concurrently with bonding the elastomer to the elastomeric structure. 9. The method of claim 6, wherein the step of passing the elastomeric structure through a helical attachment device is facilitated by rotating a cylindrical drum supporting the elastomeric structure. . 10. The method of claim 6, wherein the apparatus includes a movable transport assembly holding the extrusion head, and the method further comprises: A method comprising the step of moving the transport assembly towards one end of an object. 11. The method of claim 10, wherein the apparatus includes a second movable conveying assembly and a second extrusion head, the apparatus further comprising a second movable conveying assembly and a second extrusion head. moving two extrusion heads toward a second end of the elastomeric structure, extruding the elastomer through the first extrusion head and the second extrusion head so that the extrusion head is compatible with both ends of the elastomeric structure. A method comprising: providing a first end to the elastomer; and bonding the elastomer to opposite ends of the elastomeric structure by pressing the extruded elastomer onto substantially all of the exposed surface of the elastomeric structure. .