CN105346332A - Tyre - Google Patents

Abstract

The invention provides a tyre, and belongs to the technical field of tyres. The tyre comprises a tyre rim, a tyre body and a tyre core, wherein the tyre body is mounted on the tyre rim and consists of a tyre surface part and a tyre side part which are integrally connected; the tyre side part is tightly connected with the tyre rim; the tyre core is stuffed between the tyre surface part and the tyre side part in a sealing manner; the tyre core is formed from molding compression of E-TPU foaming granules. The tyre disclosed by the invention has the advantages of being high in strength and not liable to have a blowout.

Description

a tire

technical field

The invention belongs to the technical field of tires, and relates to a tire, in particular to a tire suitable for harsh working environments such as large and small automobiles, airplanes, military affairs, industry, and mining.

Background technique

In today's rapidly developing human society, transportation is becoming more and more developed. Whether it is flying in the sky or running on the ground, it is inseparable from tires. Tires are circular elastic rubber products that are rolled on the ground and rolled on various vehicles or machinery. Usually installed on metal rims, it can support the body, buffer external impact, realize contact with the road surface and ensure the driving performance of the vehicle. Tires are often used under complex and harsh conditions, and they are subjected to various deformations, loads, forces, and high and low temperature effects during driving, so they must have high load-bearing performance, traction performance, and cushioning performance. At the same time, it is also required to have high wear resistance and flex resistance, as well as low rolling resistance and heat generation.

In the prior art, there are certain shortcomings in the structure and production process of tires made of general rubber materials. The main defects are as follows: additives such as carbon black need to be added during processing, and vulcanization and setting are required, which puts a lot of pressure on environmental protection; Complex processes such as banburying, molding, and vulcanization are required, requiring a lot of manpower and material resources; high-pressure air needs to be filled in the tire, resulting in an unsolvable tire blowout problem; a large amount of steel wire needs to be added in the tire, which increases the weight, while increasing energy consumption.

In addition, the internal friction of the internal molecular chain of the polyurethane solid tire material in the past leads to mechanical hysteresis, which leads to heat loss and heat generation. In addition, the polyurethane material is a poor conductor of heat, and thermal damage caused by internal heat accumulation affects the service environment and life of the tire. .

To sum up, in order to solve the deficiencies in the existing tire structure, it is necessary to design a tire with high strength and not easy to blow out.

Contents of the invention

The purpose of the present invention is to propose a tire with high strength and not easy to blow out, aiming at the above-mentioned problems in the prior art.

The purpose of the present invention can be achieved through the following technical solutions: a tire comprising:

rim;

The carcass is installed on the rim and is composed of a connected tread portion and a sidewall portion, and the sidewall portion is closely connected with the rim;

The tire core is sealed and filled between the tread part and the sidewall part, and the tire core is made of E-TPU foamed particles by compression molding.

As a further improvement of the present invention, the carcass is made of polyurethane material.

As a further improvement of the present invention, the tire core is adhesively connected with the tread portion and the sidewall portion respectively.

As a further improvement of the present invention, a plurality of beads are buried on a side of the tire core close to the rim, and the beads are arranged close to the inside of the sidewall.

As a further improvement of the present invention, there are six beads and the six beads are symmetrically installed in the tire core, and the beads on the same side are arranged in steps from outside to inside with decreasing diameters.

As a further improvement of the present invention, the outer surface of the sidewall portion is coated with a protective coating for preventing foreign impurities from penetrating into the tire core.

As another improvement of the present invention, the middle part of the core near the rim is coated with an air-tight layer, and an air-filled cavity is formed between the air-tight layer and the sidewall, and the sidewall is detachably An air valve for conducting the air-filled chamber and the outside air is installed, and the air valve is worn on the rim.

Based on the above technical solutions, the embodiments of the present invention can produce at least the following technical effects:

1. The tire core is made of high-elastic E-TPU particles made by molding process, which has low flattening resistance coefficient and higher load capacity, and the tire body composed of the above-mentioned carcass and tire core is solid, so it has It has the characteristics of high strength, no fear of puncture, no tire blowout, and safe use.

2. The pores inside the tire core plus a small amount of molded pores can solve the internal heat accumulation problem of other polyurethane tire cores, and the tire manufacturing process is simple, without adding additives such as carbon black, and the production process is pollution-free. The wear and tear produced during use will not cause pollution, which is beneficial to human beings and the environment. It is a safe, durable, green and environmentally friendly new type of tire, which can be widely used in various large and small cars, aircraft, military, industrial, Wide versatility in places with harsh environments such as mining.

Description of drawings

Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in further detail, wherein:

Fig. 1 is a sectional view of a preferred embodiment of the present invention.

Fig. 2 is a cross-sectional view of a second embodiment of the present invention.

Fig. 3 is a cross-sectional view of a third embodiment of the present invention.

In the figure, 10, rim; 20, carcass; 21, tread portion; 22, sidewall; 30, tire core; 31, airtight layer; 40, bead; 50, inflation cavity; 60, air valve.

detailed description

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

The invention protects a tire, especially a solid tire formed by TPU, especially a solid tire molded by E-TPU foam particles, which is mainly used for large and small automobiles, aircraft, military, industrial, mining and other environments with harsh environments. industry, and can also be applied to other operating environments other than the above-mentioned industries.

Existing tires have certain shortcomings in structure and production technology, such as poor strength, generally difficult to solve the problem of tire blowout, and the production process is complicated, and the protection of environmental protection and safety is insufficient. Therefore, in order to overcome the puncture and puncture problems of common rubber material tires and the internal heat accumulation problem of common polyurethane solid tires, it is necessary to develop a more reasonable tire.

The technical solution provided by the present invention will be described in more detail below in conjunction with FIG. 1 to FIG. 3 .

As shown in Figures 1 to 3, the tire includes:

rim 10;

The carcass 20 is installed on the rim 10 and is composed of a connected tread portion 21 and a sidewall portion 22, and the sidewall portion 22 is closely connected with the rim 10;

The tire core 30 is sealed and filled between the tread part 21 and the sidewall part 22, and the tire core 30 is made of E-TPU foamed particles by molding.

In this case, the above-mentioned tire is a new type of E-TPU particle solid tire, which is a green, environmentally friendly and safe tire made of new materials and new technologies. The above-mentioned tread portion 21 is the tread position of the tire, and the sidewall The portion 22 is the side and inner side of the tire, and the inner side of the sidewall portion 22 is in close contact with the rim 10 during actual production.

As a new type of polymer material, TPU is called thermoplastic polyurethane elastomer rubber. It is a thermoplastic granular material. TPU has good elasticity, high strength, good wear resistance, non-toxic, oxidation resistance, various processing methods and wide applicability. Therefore, driven by multiple factors such as technological development, application promotion, cost reduction, and environmental protection concepts, the TPU industry will maintain a rapid growth trend in the future, and TPU foaming technology has also become a topic that has attracted much attention in recent years.

E-TPU is a kind of foamed thermoplastic polyurethane particles with closed-cell structure, which has the characteristics of high elasticity, excellent resilience, good wear resistance, high tensile strength, good chemical stability and environmental friendliness. It is still very soft and elastic at extremely low temperatures (such as minus 20 degrees).

In the initial state of this tire, the tire core 30 adopts highly elastic E-TPU particles made by a special process, which has a low flattening resistance coefficient and higher load capacity, and the tire composed of the above-mentioned carcass 20 and tire core 30 The main body is solid, so it has the characteristics of high strength, no fear of puncture, no tire blowout, and safe use.

Furthermore, in the present invention, the pores of the inner particles of the tire core 30 plus a small amount of pores molded can solve the problem of internal heat generation and accumulation existing in other polyurethane tire cores 30 .

In addition, the manufacturing process of the tire of the present invention is simple, does not need to add additives such as carbon black, the manufacturing process is pollution-free, and the wear and tear generated in the use process will not cause pollution, which is beneficial to human beings and the environment. It is a safe, durable, Green and environment-friendly new tires can be widely used in places with harsh environments such as various large and small cars, aircraft, military, industry, and mining.

As a preferred or optional implementation manner, preferably, the above-mentioned carcass 20 is made of polyurethane material. Further, the polyurethane material is a polyurethane material with high density, high wear resistance, tear resistance and low modulus, so that the finished carcass 20 has strong wear resistance, tear resistance and crack growth resistance, and Its wear resistance is 2-10 times that of natural rubber, which makes the tire use in a wider range of environments and has a longer service life.

Specifically, the carcass 20 can be made of high wear-resistant polyurethane material such as polyurethane to ensure the strength of the finished tread portion 21 .

In order to prevent the tire core 30 from dislocation sliding with the tire tread and the sidewall portion 22, preferably, the tire core 30 in the present invention is adhesively connected to the tread portion 21 and the sidewall portion 22 respectively.

To facilitate fixing the tire core 30 and the sidewall portion 22 during production, preferably, a plurality of beads 40 are buried on the side of the tire core 30 close to the rim 10 , and the beads 40 are arranged close to the inside of the sidewall portion 22 . The bead 40 mainly plays the role of fixing and positioning, especially at least one bead 40 is embedded in the shoulder of the sidewall part 22, that is, at least one bead 40 should be buried in the bending part of the sidewall part 22 close to the side of the rim 10. The fixed bead 40 ensures production efficiency and reliability of work.

Further preferably, in this case, there are six beads 40 and the six beads 40 are symmetrically installed in the tire core 30 , and the beads 40 on the same side are arranged in steps from outside to inside with decreasing diameters. In practical applications, preferably, two to six bead beads 40 are provided, and the bead beads 40 are symmetrically distributed.

The bead 40 adopting the above-mentioned structural layout closely cooperates with the tire core 30, the sidewall portion 22, and the rim 10, and is firmly fixed to ensure the reliability and safety of the tire.

In this case, the above-mentioned tire can not only be made completely solid, but also can reserve a certain inflation space according to actual needs, so it can be used flexibly and has wide versatility. Below in conjunction with Fig. 1 to Fig. 3 respectively enumerate two kinds of preparation methods for preparing the above-mentioned solid tire and a kind of preparation method for preparing the tire with reserved inflation space, wherein Fig. 1, Fig. 2 show that preferred in the present invention Figure 3 shows the tire with reserved air space.

The tire shown in Figure 1 mainly includes a rim 10, a carcass 20, a tire core 30 and a bead 40, which is a new type of E-TPU particle solid tire. It should be added that the carcass 20 of the solid tire Consisting only of the tread portion 21, the carcass 20 is not provided with a sidewall portion 22, that is to say, in the molded tire, the side of the tire core 30 is directly exposed to the outside world, and the side of the tire core 30 is the sidewall. For this, preferably, the outer surface of the sidewall portion 22 (ie, the side surface of the tire core 30 ) is coated with a protective coating for preventing foreign impurities from penetrating into the tire core 30 . It prevents other fine sundries in the environment from penetrating into the interior of the tire after the sidewall portion 22 is used for a long time, reduces damage to the tire, and improves its service life.

It is worth mentioning that the carcass 20 of the tire shown in Fig. 2 and Fig. 3 is composed of a connected tread portion 21 and a sidewall portion 22, and the tire core 30 is not exposed to the outside world. Therefore, Fig. 2 and Fig. 3 The sidewall portion 22 of the tire shown in FIG. 3 can be selected whether to be coated with a protective coating according to actual needs.

The preparation method of the tire shown in Figure 1 is as follows: first, based on supercritical carbon dioxide and high-temperature steam, ultra-slightly expanded TPU particles with low density, high elasticity, and low internal heat generation are prepared; then the expanded particles are placed in the tire core In the preparation mold of 30, it is molded at a certain temperature, pressure, and time (steam molding or heating molding can be used). 10; open the above-mentioned mold, take out the tire core 30; then inject high-density, high wear-resistant, tear-resistant, low-modulus polyurethane material into the tread mold by using an injection molding machine; open the mold, and take out the tire tire obtained by curing Body 20 (i.e. tread portion 21); the tread portion 21 is bonded to the tire core 30 with an adhesive; finally, a layer of protective coating (made of special material) is applied on the sidewall portion 22, and after standing for a certain period of time, Serve finished tires.

In the tire shown in FIG. 1, since no sidewall portion 22 is provided, in order to make the structural layout more reasonable, it is preferable that the width of the core 30 is equal to the width of the tread portion 21, and the tread of the tire is closely connected with the core 30. The inside of the carcass 20 does not use any cords and carbon black as reinforcing materials.

In order to make the molded tire work more reliably and stably, it is preferable to adopt the second preparation method to make the tire shown in Figure 2, which mainly includes a rim 10, a carcass 20 (including a tread portion 21 and a sidewall portion 22), The tire core 30 and the bead 40 are also a novel E-TPU particle solid tire, and its preparation method is as follows:

First, based on supercritical carbon dioxide, ultra-slightly expanded TPU particles with low density, high elasticity, and low internal heat generation are prepared; then the expanded particles are placed in the core 30 preparation mold, and molded at a certain temperature, pressure, and time Molding (steam molding or heating molding can be used), during this process, it is necessary to embed the tire bead 40 (preferably a bead ring) into the tire core 30 near the rim 10; open the mold, take out the tire core 30; The surface of the core 30 is coated with an appropriate amount of adhesive, put into the follow-up mold, then the mold is closed, the centrifugal molding machine is started, and the high-density, high wear-resistant, tear-resistant, and low-modulus polyurethane material is injected into the mold by the injection molding machine. In the mold; stop the machine, wait for 15-25 minutes to mature and form the carcass 20, open the mold, and after some post-processing, the finished tire is obtained.

In the above-mentioned tire preparation method, the internal structure of the tire is a high-density, high-wear-resistant polyurethane material tread portion 21 and sidewall portion 22 wrapping a tire core 30 molded by low-density, high-elasticity E-TPU particles, The tread and tire core 30 are bonded together as a whole, and no cords and carbon black are used as reinforcing materials inside the carcass 20; The full solid tire produced by the combination of craftsmanship and compression molding has higher strength and is less prone to puncture.

As shown in Figure 3, the tire is a tire with reserved inflation space. The tire includes a rim 10, a carcass 20 (including a tread portion 21 and a sidewall portion 22), a tire core 30 and a bead 40, further, the tire core 30 is coated with an airtight layer 31 in the middle of one side close to the rim 10, and an air-filled cavity 50 is formed around the air-tight layer 31 and the sidewall part 22. and the air valve 60 of outside air, and the air valve 60 is set on the rim 10 .

The preparation method of the tire shown in Figure 3 is as follows: firstly, supercritical carbon dioxide is used to prepare ultra-slightly expanded TPU particles with low density, high elasticity, and low internal heat generation by using high-temperature steam; In the mold, it is molded under a certain temperature, pressure, and time (steam molding or heating molding can be used), and during this process, it is necessary to embed the tire bead 40 (preferably a steel bead) into the tire core 30 near the rim 10 ; open the mold, take out the tire core 30; apply an appropriate amount of adhesive on the surface of the molded tire core 30, put it into the follow-up mold, then close the mold, start the centrifugal molding machine, and make the high-density, high wear-resistant, tear-resistant Cracked, low-modulus polyurethane material utilizes injection molding machine to inject in this mould; Shut down, after waiting for 15-25 minutes to ripen molding carcass 20, open mould; The inner liner 31 is coated, and after some post-processing, the finished tire is obtained.

In the tire preparation method, the internal structure of the tire is a high-density, high-wear-resistant polyurethane material tread portion 21 and sidewall portion 22 wrapping a tire core 30 molded by low-density, high-elasticity E-TPU particles. The surface and the core 30 are bonded together as a whole, and no cords and carbon black are used as reinforcing materials inside the carcass 20; a certain gap is left at the bottom of the core 30, and an airtight layer 31 is coated on the surface of the core 30 above the gap, so that the air The dense layer 31 is determined according to the tire specification; the tread portion 21 and the sidewall portion 22 of the carcass 20 are also produced by the centrifugal molding process, and the full solid tire produced by the combination of the centrifugal forming process and compression molding has higher strength. It is more difficult to blow out, and an inflation space (that is, the area enclosed between the airtight layer 31 and the sidewall 22) is preset in the tire, which can meet the actual use requirements, and the space of the tire core 30 occupied by the inflation space Less, to ensure the structural strength of the tire, so that it is not easy to wrap, making the tire more flexible to use.

In summary, the technical solution adopted by the present invention to solve its technical problems is preferably the tire shown in Fig. 2 or Fig. 3, and its tread adopts polyurethane material with high density, high wear resistance, tear resistance and low modulus. The wear resistance is 2-10 times that of natural rubber; the tire core 30 is molded with highly elastic E-TPU foam particles and bonded to the tread and sidewall to prevent the tread and tire core 30 from misalignment and sliding; The carcass 20 does not use additives such as cords and carbon black as reinforcing materials; 2-6 beads 40 are embedded near the rim 10 of the tire, especially at least one bead is buried at the tire shoulder; the tire adopts centrifugal molding process and compression molding The way of bonding is made again. The tread and the tire core 30 are made twice. The tire core 30 is first molded, and then placed in the mold to pour the centrifugally formed tread, so that the tread, that is, the tire core 30, is tightly bonded into a whole. The finished tire can be completely solid, and its strength is much greater than that of ordinary rubber tires. It can also leave a certain inflation space according to requirements, which is flexible in use and wide in versatility.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (7)

1. A tire, characterized in that: comprising: rim; The carcass is installed on the rim and is composed of a connected tread portion and a sidewall portion, and the sidewall portion is closely connected with the rim; The tire core is sealed and filled between the tread part and the sidewall part, and the tire core is made of E-TPU foamed particles by compression molding. 2. A tire according to claim 1, characterized in that: the carcass is made of polyurethane material. 3 . The tire according to claim 1 , wherein the tire core is adhesively connected to the tread portion and the sidewall portion respectively. 4 . 4 . The tire according to claim 1 , 2 or 3 , wherein a plurality of beads are embedded on a side of the tire core close to the rim, and the beads are arranged close to the inside of the sidewall. 5. A tire according to claim 4, characterized in that: there are six beads and the six beads are symmetrically installed in the tire core, the beads on the same side are arranged in steps from outside to inside and Decreasing diameter. 6. A tire according to claim 1, 2 or 3, characterized in that: the outer surface of the sidewall part is coated with a protective coating for preventing foreign impurities from penetrating into the tire core. 7. A tire according to claim 1, 2 or 3, characterized in that: the middle part of the side of the tire core close to the rim is coated with an airtight layer, and an airtight layer is formed between the airtight layer and the sidewall. In the air chamber, an air valve for conducting the air chamber and outside air is detachably installed on the sidewall, and the air valve is pierced on the rim.