MXPA06000475A - Method and apparatus for flatproofing a tire and wheel assembly and resulting flatproofed assembly - Google Patents

Abstract

A method and apparatus are disclosed for flatproofing a tire and wheel assembly (208) with a flexible, lightweight foam-fill by supplying at least two polyurethane reactive materials to a static mixer (116). The static mixer mixes the reactants, and a nucleating gas is supplied to the mixed reactants in the static mixer to form a liquid reactant mixture with entrained gas. The reactant mixture is injected into the tire and wheel assembly where the mixture reacts and foams replacing the air in the tire with a flexible, lightweight semi-open cell foam-fill. The resulting foam-filled tire and wheel assembly is then allowed to cure.

Description

befare the expiralion of the lime, limit for amending tlie For two-letter codes and other abbrevialions. referto the "Guid-claims and to be republished in the event of receipt of anee Notes on Codes and Abbreviations" appearing to thebegin-arnendrnents no ofeach regular issue oflhe PCT Gazette.

METHOD AND APPARATUS FOR APPLYING ANTIPONCHADURA MATERIALS TO A RIM AND THE RESULTING ASSEMBLY FIELD OF THE INVENTION The present invention relates generally to a method and apparatus for applying spill-proof material to rim and rim assemblies and more particularly, to apply splinter-proof material to rim and rim assemblies without a chamber, using flexible polyurethane foam. lightweight formed in the rss and tubeless assemblies to replace the air in the rim and rim assemblies without a chamber and to the resulting antipuncture assembly.

PREVIOUS ART Traditionally, the antifreeze tires have been manufactured with one of the following methods. In one method, a solid polyurethane material is injected into a solid mold to produce an antipuncture tire. The mold with the solid polyurethane material is heated and rotated and subsequently allowed to cure. After curing the solid polyurethane tire is removed from the mold. Another antiplagging method offered by several companies including Arnco, CinAir and Carpenter, generally known as "traditional filling" involves filling a rim of rubber mounted on a rim with solid polyurethane. The reagents of the polyurethane (a polyol and an isocyanate) are mixed using a static mixer and pumped into the rim through the stem valve in the rim under the same pressure as the normal air inflation pressure of the rim. The reactive mixture is then allowed to cure inside the tire forming a solid polyurethane filler inside the tire. Typically, an extender, such as an oil, is included in the reaction mixture. The solid polyurethane, however, is very heavy. For example, a typical solid polyurethane filler with an oil extender, has no cells and has a high density of approximately 1000 Kg / M3 making it practical for use only with heavy equipment. This method has additional disadvantages. As the reactants are pumped into the tire under pressure, namely; the normal inflation pressure of the rim, the rim should be filled while it is placed inside a safety platform in case the rim fails during filling. Other anti-splinter methods use non-urethane antifouling materials that do not replace the air in the rim and tire assembly. They seal leaks and / or punctures in the tire to minimize air loss. In this regard, these non-urethane antiputter materials are not considered as an antipuncture. From the foregoing, it can be appreciated that it would be desirable to have a lightweight flexible polyurethane foam that replaces the inflated air in the rim as a means to support the rubber tire without a camera allowing it to be used in low speed applications, different from those of Heavy equipment. Example of such desired applications of low speed light weight include applications for dirt, construction, lawn and garden. Such a flexible foam could provide the pneumatic performance of a pneumatic tire inflated with air due to its flexible cell walls, semi-open cell structure and density, uniform size and distribution of the cells. It may also be appreciated that it would be desirable to have a process for applying antisharp material to the rim and wheel assembly by injecting reactive liquid materials into the rim and wheel assembly to form a flexible polyurethane foam that replaces the inflated air in the rim and rim assembly. camera that is relatively maintenance free. In addition, it can be appreciated that it would be desirable to have a portable apparatus that injects the reactive liquid materials into the tire and rim assembly without a chamber to apply spill-proof materials that can be used in the field by tire distributors, avoiding the need to return the rim to the factory. Furthermore, it can be appreciated that it would be desirable for safety considerations to have a filling process that does not require the rim cavity to be pressurized.

SUMMARY OF THE INVENTION A method and apparatus for applying poultices to a rim and rim assembly are disclosed, forming a flexible foam, viz; a lightweight polyurethane flexible foam, in situ, in a rim and wheel assembly. Flexible lightweight polyurethane foam replaces inflated air through means to inflate and support the rim used in low speed applications. The flexible polyurethane foam provides a pneumatic performance similar to the inflated air due to its flexible cell walls, cellular structure, low density, size and uniform distribution of the cells. Based on the combination of the lightweight polyurethane flexible foam and the foam filling distributor apparatus of the present invention, the tire factories and / or distributors in the field can obtain a portable apparatus for injecting the reactive liquid materials within of the rim and wheel assembly. In one embodiment, the reactants of the flexible polyurethane foam of the present invention can be stored and processed at room temperature (which means approximately 21 ° C + about 7 degrees). In addition, it is not required that the reagents be injected into the rim at the normal inflation pressure of the rim air. They do not need to be pumped into the rim under pressure, as the foaming action of the reactive material forces the air out of the rim cavity and fills the entire cavity. Thus, the reagents can be effectively pumped into the tire at ambient pressure. Flexible polyurethane is a polymerization product of a polyol component, an isocyanate component, water (optional) and a catalyst system that promotes a polymerization reaction between the isocyanate component and the polyol component to form the polyurethane. The normal practice in the art is to form a mixture of isocyanate, referred to as SIDE A and to form a mixture of polyols, chain extenders, crosslinking agents, fillers, blowing agents, surfactants, catalysts, etc. , commonly referred to as SIDE B. The components of SIDE A and the SIDE B components are mixed together at a certain ratio to form the desired polyurethane polymer. The polyol component may contain either a single polyol or a mixture of two or more polyols. Specific polyols useful in the manufacture of polyurethane foams are well known in the art and include aliphatic, cyclic and aromatic polyols. The isocyanate component may contain either a single isocyanate or a mixture of two or more isocyanates. Specific isocyanates useful in the manufacture of polyurethane polymers are well known in the art and include aliphatic, alicyclic and aromatic polyols. Suitable isocyanates have an average functionality within the range of 2-8, preferably within the range of 2-5. Examples of suitable isocyanates are 2,4-toluene diisocyanate; 2,6-toluene diisocyanate; 1,6-hexamethylene diisocyanate; 1,4-naphthalene diisocyanate; 4,4'-disocyanate diphenyl methane; 4,4'-diphenylene diisocyanate; 3,3'-dimethoxy biphenylene diisocyanate; polymeric forms of the aforementioned diisocyanates, modified MDI carbodiimide diisocyanate, isocyanate terminated prepolymers and mixtures of the isocyanates listed above. Preferred reactive materials are obtained from Textile Rubber Company and are identified as EX303-41A and EZ303-41B. In one embodiment, the method includes mounting a rim, such as a tire rim, on a rim. The tire is then inflated with air or another gas at its maximum inflation pressure capacity to stretch the tire. After the tire has had enough time to stretch, vents are formed and the valve stem is removed. To produce a foam, the reactive materials are mixed in liquid form and a nuclear gas, such as air, is introduced into the liquid reactive mixture to entrain the gas within the reactive mixture. This reactive mixture can be formed under ambient conditions. The liquid reactive mixture with the entrained gas is then introduced into the rim through the opening of the rod valve. Once the rim is filled with the specified amount of the liquid reactive mixture, a plug is inserted into the opening of the rod valve. It is then allowed to react to the reactive mixture or foam inside the rim. The foaming action produces a cellular foam structure of flow density, which means a density of about 320 Kg / M3 or less. The ventilation holes in the rim allow air or other gas to escape from the rim as the reactive mixture is pumped into the rim, the foam draws out the air that was previously in the rim. The foam is then allowed to heal. The curing time can be from 12 to 24 hours. In one embodiment, an apparatus is provided for carrying out the method described above for preparing an antipuncture tire with a cellular foam structure. The apparatus includes a reactive mixing head and at least two supply lines for supplying the individual reactive components to the mixing head. A mixer is attached to the mixing head. A supply line is also provided to the mixer to supply nuclear gas to the mixer. The mixer has an outlet nozzle to release the liquid reactive mixture with gas entrained within the rim through the opening of the valve stem of the rim. In one example, the mixing head is what is known as a static mixer and the reactive materials are mixed and pumped into the tire under ambient conditions. The mixer and supply lines can be associated with a portable frame having the work surface on which an assembly of the rim and rim can be placed to fill it with the liquid reactive mixture. The frame may optionally include moving means such as pumps or compressed gas sources to release the reactive materials and / or the nuclear gas to the mixing head. If desired, a scale can be included in the work surface to monitor the weight of the tire and wheel assembly during filling with the liquid reactive mixture. Other methods, systems, devices, features and advantages of the disclosed method and the resulting assembly of the rivet and rip-off rim will be or become apparent to the person skilled in the art, after examining the following drawings and detailed description of the present invention. . It should be understood that all additional methods, systems, devices, features and advantages are included within this description and therefore, are within the scope of the present invention and are protected by the accompanying claims.

BRIEF DESCRIPTION OF THE DRAWINGS Many of the aspects of the method and apparatus disclosed as well as the resulting assembly of the rim and rim can be better understood by referring to the accompanying drawings, Figs. 1-4A. The components in the drawings are not necessarily to scale, on the contrary, emphasis is placed on the clear illustration of the principles of the present invention. Also, in the drawings, reference numbers do not need corresponding parts through several views. Fig. 1 is a schematic view of one embodiment of a foam filling dispensing apparatus. Fig. 2 is a perspective view of one embodiment of the static mixer and the rim and wheel assembly. Fig. 3 is a schematic view of one embodiment of a static mixer.

Figs. 4 and 4A are a flow diagram illustrating one embodiment of the process for the assembly of rim and rippling rim. In Fig. 4: a: Start. b: Mounted rim on the rim. c: Inflation of the tire and rim assembly with air. d: Obtain either the size and / or the weight of the tire and rim assembly. e: Provide ventilation holes in the side walls of the rim. f: Remove the stem from the valve to form an opening in the stem valve. g: Supply reactive materials to the static mixer. h: flow diagram connector In Fig. 4A: h: connector of flow diagram i: Mixing of materials via static mixer j: Supply of nuclear gas to the mixed reactive material. K: Inject foam into the rim and wheel assembly via the rod valve opening. I: Insert the plug in the opening. m: Allow trapped air to escape through the ventilation holes n: Cure the rim. ñ: FIN DETAILED DESCRIPTION OF THE PREFERRED MODALITY Referring now to the figures, wherein the reference numbers represent similar parts of several views, in Figs. 1-3 is illustrated as an example, an apparatus for carrying out the present method for producing the foam-filled rip-and-fill assembly of the present invention. Referring to Fig. 1, the foam filling dispensing apparatus 100 comprises supply lines 102 for supplying reactive materials to create foam filling, respective pumps 106A-B for releasing the reactive materials, a nuclear compressor (not shown) , static mixer 116 which receives the reactive polyurethane materials released by the pumps 106A-B and optionally a work table 114. The apparatus 100 is coupled with the containers of reactive material 108A-B. The reactive materials stored in containers 108A-B are used to make the flexible lightweight foam for the rim and wheel assembly 208 (shown in Fig. 2) which replaces the inflated air in the rim and rim assembly 208. The materials reagents are supplied to the mixing head 104 coupled to the static mixer 116 via the pumps 106A-B. The reactive materials travel through the supply lines 102 to the static mixer 116. The pumps 106A-B can be mechanically coupled to supply the desired amount and amount of materials needed for the tire and ripple assembly 208 from the 108A containers -B to the static mixer 116. The pumps 106A-B can be controlled by a control panel (not shown). The static mixer 116 is described in more detail with reference to Fig. 3. These components can be mounted to a frame assembly with wheels 110 to allow the apparatus to be portable. A nuclear gas compressor (not shown) is coupled to a nuclear gas supply line 118 that is coupled to the static mixer 116. The nuclear gas compressor supplies nuclear gas through the nuclear material supply line 118 to the materials mixed reagents in static mixer 116. The preferred source for nuclear gas is one that provides a clean and dry gas. One way to keep the gas dry and clean is to use an oil-free compressor for the gas. Such a compressor can be mounted on the frame assembly 110 or located outside the frame assembly. The source of the gas can be either an air tank or a commercial source. In a modality, the rim and wheel assembly is filled with flexible low density polyurethane foam. The reactive materials for creating the foam are a polyisocyanate and a polyol. The nuclear gas can be air. However, any other gas can be inert with the reactive materials and the resulting foam can be used. Fig. 3 is a schematic view of one embodiment of a static mixer that can be used in the present invention. With reference to Fig. 3, static mixer 116 includes a core material inlet 202 and one or more helical elements 302. Static mixers of this type are available from ConPro Tec, Inc. and Tah Industries, Inc. A suitable static mixer 116 may be of the type shown in U.S. Patent 4,522,504. The static mixer 116 can be mechanically coupled to a mixing head 104 (shown in Figs 1 and 2) in which the mixing head 104 can be a pneumatic operation valve with dual inlet-outlet ports allowing the reactive materials of containers 108A-B enter together in the mixer. The static mixer 116 contains the helical elements 302 having inverse helices that mix the materials of the containers 108A-B, as the materials move through the static mixer 116. The static mixer 116 has an outlet 304 for distributing the mixture of the liquid reagents with entrained gas, within the rim and rim assembly 208 via the opening of the stem valve 206 (shown in Fig. 2). In one embodiment, the static mixer 116 has from twelve (12) to forty-eight (48) helical elements 302. The system can be designed to allow the exchange of mixing heads and mixers, depending on the flow velocities of the desired material. Also with reference to Fig. 3, an orifice 204 together with the inlet of nuclear material 202 of the static mixer 116 is located in the static mixer 116 between the mixing head 104 and the outlet of the static mixer 304. In one embodiment, the orifice 204 can be located at the entry point of the nuclear material (L2), which can be from 5 to 8 helical elements 302 of the mixing head 104 and from the static mixer 116 towards its outlet 304. Alternatively, two sections of the mixer 116 can be placed in line with an opening between the sections where the inlet 202 can be placed to introduce the nuclear gas. The location of the orifice 204 can provide nuclear gas at about 0.703 Kg / cm2 or more than the pressure of the reactive materials in the static mixer 116 to force the nuclear gas into the mixed reactive materials of the 108A-B containers in the mixer static 116. If the orifice 204 is too close to the outlet 304 of the static mixer 116, the nuclear gas pushes only the mixed reactive materials and is not entrained in the mixed reactive materials. The pressure of the nuclear gas supplied to the static mixer 116 must be equal to or greater than the pressure inside the static mixer 116. The pressure of the nuclear gas must also be high enough to draw the gas into the mixture of the liquid reagents, which is injected inside the rim and wheel assembly 208. The pressure of the nuclear gas is also coupled to the flow velocity of the reactive materials. The higher the flow velocity of the reactive material, the higher the flow velocity of the desired nuclear gas. This mixture is injected into the rim and wheel assembly where the mixture reacts to create a foam of semi-open cells. When the injection of the liquid reagent mixture into the rim and wheel assembly 208 is completed, the tire and rim assembly filled with foam 208 is cured for approximately 12 to 24 hours. Fig. 2 is a perspective view of one embodiment of the static mixer and the rim and wheel assembly. With reference to Fig. 2, an accessory drill 212 can be placed over the rim and rim assembly 208, because the side wall of the assembly 208 is up and away from the work table 114. The accessory drill 212 can include a dispensing opening that is used as a guide for centering the attachment 212. At least one vent hole is drilled through the tire casing to provide an air outlet inside the tire casing, so that it will escape when the tire 210 is filled with foam flexible polyurethane. In one embodiment, the ventilation holes are located in the sidewall of the rim 210, where the side wall of the rim contacts the accessory bore 212, in one or more radial grooves in the accessory bore 212. The air vents may be as small as 0.32 cm. in diameter and as large as 0.16 cm. diameter. For larger rims, more holes and holes with larger diameters are recommended, in order to inject the liquid reagents into the rim and rim assembly 208 and to allow them to react within the rim to form the foam filled rim disclosed herein. In addition, the more vents in the rim, the reactive mixture can be injected and distributed in the rim and wheel assembly more evenly and with less air pockets. The diameter of the ventilation holes should be such that only a minimum amount of foam leaks out of the ventilation holes and does not expand through them. When the foam is cured inside the rim, the foam forms a film layer around the rim and over the ventilation holes and thus, very little foam escapes from the ventilation holes. Also with reference to Fig. 2, the valve stem is removed leaving an opening 206, into which the static mixer 116 is inserted. The accessory drill 212 may have an opening for the static mixer 116 to be disposed through the opening of the rod valve. The pumps 106A-B supply the reactive materials in containers 108A-B to the static mixer 116. As the static mixer 116 mixes the reactive materials, the nuclear material compressor (not shown) feeds the nuclear gas to the material supply line. nuclear 118. The nuclear gas travels through the orifice 204 to the inlet of nuclear material 202 of the static mixer 116 where it is drawn into the mixed reactive materials. The nuclear gas can be controlled by a flow valve or restrictor holes 204 of various sizes. A nuclear gas compressor may be provided in the rack assembly or remotely located therefrom. The mixture is injected into the rim and wheel assembly until it replaces the air. A plug is then inserted into the opening of the stem valve 206 to provide a seal that retains the mixture within the rim and rim assembly 208. FIGS. 4-4A illustrate one embodiment of the present method for making a rim assembly and antiponchaduras rin. With reference to Figure 4, method 400 for making a tire and ripple 210 assembly comprises mounting the tubeless rim 210 on the rim to form a rim and rim assembly 208, as shown in block 402. The assembly of rim and rim 208 is preferably filled with air at its maximum recommended air pressure to stretch the rim shell, as shown in block 404. In one embodiment, the rim and rim assembly 208 filled with air, is assembled and stretches for approximately twelve (12) hours, ensuring that the rim beds are properly seated in the rim, making a watertight chamber and the rim 210 is stretched to its proper shape and size. When the mixture of the liquid reagents and entrained gas is injected into the tire and rim assembly without chamber 208, the mixture fills the rim 210 and does not need to stretch the rim 210. Thus, the mixture does not need to be injected into the rim under pressure and in particular, it can be injected at a pressure below the normal air inflation pressure of the rim.

In block 406, the size of the rim and rim assembly 208 is obtained so that the amount of the mixture to be injected into the rim and rim assembly 208 can be determined. The work table 114 includes a scale 120 constructed to weigh the rim and rim assembly 208. The rim and rim assembly 208 can be placed on one side of the scale 120 to obtain the size and / or weight of the rim assembly and 208. The inclusion and use of such a scale is optional. In block 408, at least one vent hole is drilled to provide an outlet for air within the rim housing to escape as rim 210 is filled with reactive material. The vent hole may be located in the side wall of the rim 210 where the side wall contacts the accessory bore 212 in one or more radial grooves in the accessory bore 212. In block 410, the valve stem is removed from the bore. rim and rim assembly 208 to form such an opening in the valve stem 206, that the static mixer 116 is disposed at that point. The static mixer 116 is placed within the opening of the valve stem 206 to inject foam through the opening of the valve stem 206 into the rim. In block 412, pumps 108A-B are activated to supply reactive polyurethane materials to static mixer 116. With reference to Fig. 4A, in block 414, static mixer 116 mixes the reactive materials together with the inlet of the reactor. Nuclear gas 202. In block 416, the nuclear compressor supplies the nuclear gas to the mixed material in the static mixer to form a mixture of the liquid reactants with the entrained gas. In one embodiment, the nuclear gas can be injected at the point of entry of the nuclear material (L2), which can be from 5 to 8 helical elements 302 from the end of the mixing head of the static mixer 116 to its outlet 304. In block 418, the mixture of the liquid reagents with the entrained nuclear gas is injected into the rim and wheel assembly 208 via the opening of the stem valve 206. In one embodiment, the reactive materials are mixed and injected into the rim under conditions of pressure and room temperature. By room temperature, it is meant, within the range of approximately 21 ° C to 27 ° C. At the lower end of this temperature range, it is preferred that the temperature be high enough to avoid freezing the polyisocyanate, which can cause it to become unstable. Once the rim and wheel assembly 208 is filled with the mixture, the apparatus is turned off and the static mixer 116 is separated from the opening of the valve stem 206. The dispensing apparatus 100 can automatically introduce the amount of mixing necessary for filling the rim and rim assembly 208 based on the size and / or weight of the rim and rim assembly 208 obtained as written in block 406. In one embodiment, the rim can be filled in approximately 30 seconds or less. The apparatus 100 may also have a safety feature for automatic filling of the tire and shutting it down, when the desired amount of mixture is injected into the tire and rim assembly to prevent overfilling of the tire with the mixture. For example, the apparatus 100 may include a trigger that activates the injection of the mixture into the rim and rim assembly 208. If the trigger is accidentally released before the apparatus 100 completes the injection of the mixture, the apparatus will automatically turn off as a safety precaution. The automatic filling feature can be carried out by a control panel (not shown) mounted on the frame assembly 110 including a keypad that allows the operator to enter the desired number of kilograms of fill for a given tire size. The keyboard can also be used to enter the specific density for the filling mixture to be injected into the tire. The control panel may include a processor programmed to convert the numerical input into weight, to volume, to determine the desired flow velocity (pumping speed) required to inject the selected fill weight into the tire. The pumping speed for the reactive materials can be monitored and controlled by, for example, placing a counter in the direction of the arrow of each pump to monitor the number of rotations of the arrow and thus, monitor the volume of the reactive materials. The scale 120 on the work surface 114 can be used to weigh the tire and rim assembly vacuum to obtain a vacuum weight for the rim and wheel assembly and to monitor the weight increase for the rim and wheel assembly, as that the mixture of reactive materials with entrained gas is injected into the rim. Once the weight selected by the operator is reached, the control panel can be programmed to shut down the reactive material pumps and also the nuclear gas source to the mixer. In block 420, after filling, the opening of the stem valve 206 can be closed with a rubber plug to hold the mixture inside the rim and wheel assembly 208. The inserted plug can also serve to prevent a user from accidentally adding. air to the tire and rim assembly 208 filled with foam. The plug can be an indication that the rim and wheel assembly 208 has been filled with foam. The full rim and tire assembly 208 is put in place for approximately 3 to 10 minutes to allow the mixture to react to create the foam and the air escaping from the trapped air will rise through the ventilation holes formed in the rim, as it is shown in block 422. This also allows the foam to undergo an initial cure. If the full tire is driven before the initial foam cure, the tire can get out of the wheel. The rim and rim assembly 208 filled with foam can then be placed on a fastening element, such as a storage rack and placed on its side for approximately 12 to 24 hours (curing time), as shown in block 424 After 12 to 24 hours, the tire filled with foam 208 can be returned to service. The resulting rim and wheel assembly is now filled with a lightweight, flexible foam having a cellular structure with a density of approximately 481 Kg / M3 or less. In one, but not the only mode, the resulting foam has a density of 232 Kg / M3 or less. It can be emphasized that the above-described embodiments of the present method and apparatus for preparing the pneumatic tire and rim assembly and the resulting piling assembly, particularly, any preferred embodiments, are primarily possible examples of implementations noted only for a clear understanding of the principles of the invention. Many variations and modifications can be made to the above-described embodiments without substantially departing from the spirit and principles of the invention. It is intended that the modifications and variations included herein be within the spirit and scope of the present invention and protected by the following claims.

Claims (28)

1. CLAIMS 1. A method for assembling a rivet and rippling tire, comprising the steps of: supplying to a static mixer at least two materials that react together to create a foam, mixing the reactive materials with the static mixer, supplying nuclear gas to the mixer static at a pressure sufficient to draw the gas into the mixture of reactive materials in static mixing, injecting the mixture of reactive materials with the entrained gas, into said rim and rim assembly, allowing the mixture of reactive materials to react within the rim creates a foam filling and heals the foam filling inside the rim.
2. 2. The method defined according to claim 1, wherein the reactive materials include a polyisocyanate and a polyol to react together to form a polyurethane foam.
3. 3. The method defined in accordance with claim 1, further comprising removing a rod valve from the rim and rim assembly to form an opening in the rod valve.
4. 4. The method defined in accordance with claim 3, wherein injecting the mixture of reactive materials with the entrained gas into the rim and rim assembly comprises injecting the mixture through the opening of the rod valve.
5. 5. The method defined in accordance with claim 4, further comprising inserting a plug into the opening of the rod valve after the injection is completed.
6. 6. The method defined in accordance with claim 1, further comprising mounting a rim on a rim and a rim to form said rim and rim assembly.
7. 7. The method defined in accordance with claim 1, further comprising filling with air of said rim and rim assembly before injecting the mixture to stretch the rim.
8. 8. The method defined in accordance with claim 1, further comprising obtaining the size of the tire and rim assembly to determine the amount of the mixture to be injected into said rim and rim assembly.
9. 9. The method defined in accordance with claim 1, further comprising forming at least one vent hole in said rim before injecting the mixture.
10. 10. The method defined in accordance with claim 9, further comprises allowing the foam to expand in said rim and rim assembly and allowing trapped air to escape through the vent hole in said rim.
11. 11. The method defined in accordance with claim 1, wherein injecting the mixture into said rim and wheel assembly comprises automatically injecting the amount of mixture necessary to fill said rim and rim assembly based on the size and / or weight of the assembly. rim and rin obtained.
12. 12. The method defined in accordance with claim 1, wherein the reactive materials are mixed and injected into the tire under ambient temperature conditions.
13. 13. The method defined in accordance with claim 1, wherein the reactive materials are mixed and injected into the rim under ambient pressure conditions.
14. 14. The method defined according to claim 1, wherein injecting the mixture of reactive materials with the entrained gas into the rim and rim assembly comprises injecting the mixture through the rod valve.
15. 15. The method defined in accordance with claim 1, further comprising drilling a hole through the side wall of the rim or rim to form an opening in the rod valve.
16. 16. The method defined in accordance with claim 19, wherein injecting the mixture of reactive materials with entrained gas into the rim and wheel assembly comprises injecting the mixture through the hole created in the sidewall of the rim.
17. 17. The method defined in accordance with claim 1, wherein the rim and rim assembly to be puncture-proof is a rim assembly with chamber and rim.
18. 18. A tire and wheel assembly where the tire is filled with a foam having a low density cellular structure of approximately 481 Kg / M3 or less.
19. 19. The rim according to claim 18, wherein the rim is filled with a polyurethane foam.
20. 20. The rim according to claim 18, wherein the foam has a density of about 232 Kg / M3 or less.
21. 21. A system for filling a rim and wheel assembly with a mixture of reactants to react within said rim and rim assembly to create a foam filler within said rim and rim assembly, comprising: a frame having a work surface to receive said rim and wheel assembly, a mixer associated with the frame to receive said reagents and create a mixture of said reagents, supply lines attached to the mixer to release said reagents within the mixer and a gas supply line attached to the mixer to release gas directly into the mixer to be entrained in said reagents in the mixer, the mixer includes an outlet for injecting the mixture of said reagents and entrained gas into said rim and wheel assembly.
22. 22. The system defined in accordance with claim 21, wherein the mixer is a static mixer.
23. 23. The system defined in accordance with claim 21, wherein the work surface includes a scale for weighing the rim.
24. 24. The system defined in accordance with claim 21, wherein the frame includes means for automatically controlling the amount of reagents mixed by the mixer for injection into said rim.
25. 25. The system defined in accordance with claim 21, wherein the mixer is designed to align with the opening of the stem valve of said rim to inject the mixture of said reagents and entrained gas into said rim.
26. 26. The system defined in accordance with claim 21, further including means for creating a vent hole in said rim to allow gas to escape from said rim and rim assembly after injection of the mixture of said reagents and entrained gas within. of said rim and wheel assembly.
27. 27. The system defined according to claim 21, wherein the mixer has a mixing head to which the supply lines and the mixer outlet are attached, the gas supply line is attached between the mixing head and the mixer outlet .
28. 28. The system defined in accordance with claim 21, wherein the frame is a frame having wheels.