WO2019057090A1

WO2019057090A1 - Burst-proof and puncture-proof tire, and mold and method for manufacturing same

Info

Publication number: WO2019057090A1
Application number: PCT/CN2018/106525
Authority: WO
Inventors: 卞泽根
Original assignee: 卞泽根
Priority date: 2017-09-20
Filing date: 2018-09-19
Publication date: 2019-03-28
Also published as: CN207725163U

Abstract

Disclosed are a burst-proof and puncture-proof tire and a mold and a method for manufacturing same. The burst-proof and puncture-proof tire comprises a tire body (1), an inner tire (2) and an inflation head (21), wherein the tire body (1) is of a hollow annular structure, and an accommodation cavity (3) is provided in the tire body (1); the inner tire (2) is of an annular structure, and an inflation cavity is provided inside the inner tire (2); the inner tire (2) is located in the accommodation cavity (3), and is closely connected to the tire body (1); and the inflation head (21) is fixedly connected to the inner tire (2), and is in communication with the inflation cavity. The mold comprises a lower mold (5) and an upper mold (6), wherein a lower fixing needle (7) is arranged on a lower mold cavity (51), and an upper fixing needle (8) is arranged on an upper mold cavity (61); and the fixing needles are used for fixing the inner tire (2). The manufacturing method comprises firstly placing an inner tire in a mold, closing the mold, heating the mold, then turning on a centrifuge to inject a molding material, turning off the centrifuge, and opening the mold after a period of time. The tire manufactured by the method has puncture-proof and burst-proof performance, and provides better comfort.

Description

Explosion-proof stab-resistant tire, mold and production method thereof

Technical field

The present invention relates to the field of tire manufacturing for non-high-speed traveling vehicles, and more particularly to an explosion-proof stab-resistant tire and a mold and a production method thereof.

Background technique

Tires are ground-rolled, circular elastic rubber articles that are assembled on a variety of vehicles or machinery. Usually mounted on a metal rim, it can support the body, cushion external impact, achieve contact with the road surface and ensure the driving performance of the vehicle. There are two kinds of conventional tires used on non-high-speed vehicles and transportation tools. One is solid tires. The advantage is that they are not inflated and will not be broken. However, solid tires have many consumables and are heavy, and the comfort is poor. The shock effect is poor, and it takes time and effort to install the inner tube into the tire casing; the other is the tire, and the existing tire is easily pierced or puncture, which poses a safety hazard and increases the cost and time of repair. Therefore, it is necessary to design a new type of tire that can overcome the shortcomings of the existing two types of tires, in order to meet the needs of tire safety and comfort in daily life.

Summary of the invention

In order to solve the problems existing in the prior art, the present invention provides an explosion-proof stab-resistant tire, a mold thereof and a production method thereof, to solve the problem that the solid tire of the prior art has poor comfort and the tire is easily punctured.

In order to achieve the above object, the technical solution adopted by the present invention is an explosion-proof stab-resistant tire, comprising:

The tire body is a hollow annular structure, and the tire body is provided with a receiving cavity;

The accommodating cavity has a circular shape;

The tire body includes a first protective wall and a second protective wall, the first protective wall and the second protective wall are fixedly connected to form the tire body, and the thickness of the first protective wall is greater than or equal to the second protection The thickness of the wall, and the thickness of the first protective wall is greater than or equal to 8 mm. That is, the minimum thickness of the cross section of the tire body is equal to or greater than 8 mm, so that the tire is not easily pierced or puncture. The first protective wall and the second protective wall are smoothly connected to each other.

In an embodiment of the invention, the method further includes:

The inner tube is an annular structure, and the inner tube is provided with an inflation chamber; the inner tube is located in the accommodating cavity, and is closely connected with the tire body;

An inflation head fixedly coupled to the inner tube and in communication with the inflation chamber, the inflation head extending through the tire body to an exterior of the tire body.

By providing an inflatable inner tube in the accommodating cavity, the inner tube can be inflated according to the user's comfort requirement, thereby ensuring the user's comfort. The inner tube and the tire body of the present invention may be relatively separated, and the inner tube may support the tire body after being inflated.

In an embodiment of the invention, the first protective wall is for direct contact with the ground or near the ground as compared to the second protective wall.

In an embodiment of the invention, the first protection wall and the second protection wall are both circular arc structures, the first protection wall and the second protection wall are respectively symmetrical structures, and the axis of symmetry of the first protection wall and the second The axes of symmetry of the protective walls coincide.

In an embodiment of the invention, the wall thickness gradually decreases from the first protective wall to the second protective wall. That is, the cross section of the tire body is a ring shape having different wall thicknesses.

In an embodiment of the invention, the second protective wall has a minimum thickness of 8 mm.

In an embodiment of the invention, the tire body is directly formed on the outer circumference of the inner tube by a mold. The present invention may also be that the tire body is molded on the outer surface of the inner tube by mold forming such that the tire body is formed integrally with the inner tube.

In an embodiment of the invention, the tire body is provided with an anti-slip pattern. When the outer surface of the tire body is smooth, it can be directly used as the inner tube of the vehicle, and after the tire body is provided with the anti-slip pattern, it can be used as the tire of the vehicle to directly contact the ground and slip.

A mold for an explosion-proof stab-resistant tire, comprising:

a lower mold having an annular lower mold cavity; the lower mold cavity being provided with a lower fixing needle, the lower fixing needle being fixedly connected with the lower mold;

The upper mold is provided with an annular upper mold cavity, the upper mold cavity is matched with the lower mold cavity, and the upper mold cavity is provided with an upper fixing needle, and the upper fixing needle is fixedly connected with the upper mold;

The upper mold is provided with an infusion port;

The lower fixed needle and the upper fixed needle are used to fix the position of the inner tube in the mold during the tire body forming process.

In an embodiment of the invention, the lower fixing needle has a plurality of pins arranged at least three times, each of which is circumferentially distributed, and the length of the lower fixing needle located in the middle one circle is smaller than the length of the lower fixing needle on both sides thereof. One turn of the lower fixed needle position and the center position of the lower mold cavity.

In an embodiment of the invention, the three lower fixed pins are arranged at equal intervals.

In an embodiment of the invention, the distance between two adjacent lower fixed pins on the same circle is 10-25 mm.

In an embodiment of the invention, the upper fixing needle is located at a center position of the upper mold cavity.

A method for producing an explosion-proof stab-resistant tire includes the following steps:

Placing the inner tube in the mold;

Clamping and heating the mold, the temperature is controlled at 50-80 ° C;

Turn on the centrifuge, rotate the mold, and simultaneously inject the elastomer composite;

Turn off the centrifuge to mature the elastomer composite;

Mold.

In an embodiment of the invention, the mold is fixed to the centrifuge.

The technical solution has the following beneficial effects:

By providing an annular accommodating cavity in the tire body of the composite elastomer, and setting the wall thickness of the first protective wall of the tire body to 8 mm or more, the tire is not easily pierced or puncture, and the tire is improved. safety. Further, by providing an inflatable inner tube in the accommodating cavity, the user can inflate the inner tube according to the requirements for comfort, thereby ensuring the user's comfort and the shock absorbing effect is good.

The tire body is formed by a mold matched by the upper mold and the lower mold, and upper fixing nails and lower fixing needles are respectively disposed on the upper mold and the lower mold for fixing the position of the inner tube during the molding process, and placing the inner tube to move, thereby improving The molding quality of the tire body, which greatly reduces the scrap rate of the tire production, improves the performance of the tire.

By optimizing the production process, not only the production process is easier to operate, but also the molding process is easy to control, and the tires produced have the characteristics of explosion-proof and stab-proof performance, and the shock absorption effect is good, so that the occupant has a more comfortable rider experience.

DRAWINGS

Figure 1 is a schematic view showing the structure of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1 of the present invention;

Figure 3 is a partial cross-sectional view of the present invention;

4 is a partial structural schematic view of a tire body of the present invention;

Figure 5 is a schematic structural view of a lower mold of the present invention;

Figure 6 is a plan view of Figure 5 of the present invention;

Figure 7 is a side view of Figure 5 of the present invention;

Figure 8 is a schematic view showing the structure of the upper mold of the present invention.

The reference numerals in the figure are: 1, the tire body; 2, the inner tube; 3, the receiving cavity; 4, the anti-slip pattern; 5, the lower mold; 6, the upper mold; 7, the lower fixed needle; 8, the upper fixed needle. 11, the first protective wall; 12, the second protective wall; 20, the inflation chamber; 21, the inflation head; 51, the lower mold cavity; 61, the upper mold cavity; 111, the outer circle; 222;

Detailed ways

The invention will now be further described in conjunction with the embodiments and Figures 1 through 8.

Example 1

The invention relates to an explosion-proof stab-resistant tire, which comprises a hollow annular structure tire body 1. The tire body 2 is provided with a accommodating cavity 3, and the accommodating cavity 3 has a circular shape. The tire body 1 is formed by a first protective wall 11 and a second protective wall 12, and a smooth transition connection between the first protective wall 11 and the second protective wall 12, the first protective wall 11 and the second protective wall 12 can be formed by one piece. The thickness of the first protective wall 11 is greater than or equal to the thickness of the second protective wall 12, the wall thickness of the first protective wall 11 to the second protective wall 12 is gradually decreased, and the thickness of the first protective wall 11 is greater than Or equal to 8mm.

The first protective wall 11 and the second protective wall 12 are both circular arc structures, and the first protective wall 11 and the second protective wall 12 are respectively symmetric structures, and the axis of symmetry of the first protective wall 11 and the second protective wall 12 The axes of symmetry coincide. In this embodiment, the minimum thickness of the second protective wall 12 is 8 mm, and the maximum thickness of the first protective wall 11 is 16 mm.

Example 2

The invention relates to an explosion-proof stab-resistant tire, which comprises a tire body 1, an inner tube 2 and an inflation head 21. The inner tube 2 is a hollow sealed annular structure, and an inflation chamber 20 is arranged therein for inflation. The inside of the tire body is provided with an annular accommodating cavity 3, and the inner tube 2 is located in the accommodating cavity 3, that is, the tire body 1 is sleeved outside the inner tube 2. The tire body 1 is formed by a first protective wall 11 and a second protective wall 12, and a smooth transition connection between the first protective wall 11 and the second protective wall 12, the first protective wall 11 and the second protective wall 12 can be formed by one piece. The thickness of the first protective wall 11 is greater than or equal to the thickness of the second protective wall 12, and the wall thickness of the first protective wall 11 to the second protective wall 12 gradually decreases.

The first protective wall 11 is a side wall of the tire body 1 in direct contact with the ground or closer to the ground than the second protective wall 12, that is, an outer side wall of the tire, and correspondingly, the second protective wall 12 It is a side wall that is not in contact with the ground or farther from the ground than the first protective wall 11, that is, the inner side wall of the tire.

In this embodiment, the cross-sectional shape of the tire body 1 is a ring shape having various thicknesses, similar to a water drop shape. In other embodiments, it may also be a regular circular shape. When the tire body 1 is placed in the vertical direction, as shown in FIG. 1, the circle having the largest diameter of the outer surface of the tire body 1 is referred to as an outer circle 111, and the diameter of the outer surface of the tire body 1 is minimized. It is the inner circle 222.

The distance from the outer ring of the tire body 11 to the accommodating cavity 3 needs to be greater than or equal to 8 mm, so that the tire cannot be easily punctured or puncture. In this embodiment, the minimum thickness of the second protective wall 12 is 8 mm, that is, the distance between the inner circle 222 of the tire body 11 and the accommodating cavity 3 is 8 mm; the maximum wall of the first protective wall 11 The thickness is 16 mm, that is, the distance from the outer ring 111 of the tire body 11 to the accommodating cavity 3 is 16 mm. And the wall thickness of the first protective wall 11 to the second protective wall 12 gradually decreases.

By providing the inner tube 2 in the accommodating cavity in the tire body 1, according to the user's use requirements, the tire is filled with a proper amount of gas through the inflation head 21 to ensure the comfort performance of the tire. One end of the inflation head 21 is fixed to the inner tube 2, and the other end passes through the tire body 1 and extends to the outside of the tire body. The inflation head 21 is in communication with the inflation chamber 20 for inflating the inner tube 2.

In this embodiment, the tire body 1 is directly formed on the outer surface of the inner tube 2, and the gas-filled inner tube 2 is fixed on the mold, and then the molding material of the tire body 1 is added to the mold, and after cooling, the tire is inflated. The outer surface of the body 2 is shaped to form the tire body 1, that is, the tire body 1 and the pneumatic carcass 2 are integrally formed and closely joined.

In other embodiments, the inner tube 2 is filled in the accommodating cavity, and the pneumatic carcass 2 and the tire body 1 are separated from each other and are not adhered together, that is, the tire body 1 is independently formed on the pneumatic carcass 2 The outside of the tire body 1 is supported by inflating the inner tube 2.

In this embodiment, the tire body 1 has a non-slip pattern 4 and can be directly used as a tire casing of a vehicle. In other embodiments, it may also be a smooth outer surface, which is directly used as a inner tube of a vehicle, and further a tire casing on the outer surface of the tire body 1 to form a vehicle tire.

The material of the tire body 1 is natural rubber, butadiene rubber, styrene butadiene rubber, butyl rubber, preferably polyurethane elastomer composite material, such as polytetramethylene ether glycol (PTMEG, inner tube 2 can be butyl rubber. The invention It can be used on low-speed vehicles such as bicycles, wheelchairs, rickshaws, mopeds, and electric vehicles, as well as on motor vehicles such as motorcycles.

The invention provides a accommodating cavity 3 in the tire body, and the minimum distance of the outer ring of the tire body 1 to the accommodating cavity 3 is designed to be greater than or equal to 8 mm, so that the tire is not easily pierced or puncture, thereby improving The safety of the tires. Further, by providing the inflatable inner tube 2 in the accommodating cavity, the pneumatic carcass can be inflated according to the user's comfort, thereby improving the comfort of use.

Example 3

A mold for an explosion-proof stab-resistant tire, comprising a lower mold 5 and an upper mold 6, wherein the lower mold 5 is provided with an annular lower mold cavity 51; and the lower mold cavity 51 is further provided with a lower fixed needle 7, the lower portion The fixing pin 7 is fixedly connected to the lower die 5; the upper die 6 is provided with an annular upper cavity 61, and the upper cavity is matched with the lower cavity 51. The upper mold cavity 61 is provided with an upper fixing pin 8 fixedly connected with the upper mold 6; the upper mold 6 is provided with an infusion port, and the molding material of the tire body is injected through the filling port. In the mold.

The lower fixing needle 7 and the upper fixing needle 8 are used to fix the position of the inner tube 2 in the mold during the molding process of the tire body 1, and prevent the inner tube from moving under the centrifugal force of the centrifuge. There are several lower fixing pins 7. In this embodiment, three turns are distributed, and each turn is circumferentially distributed, and the fixed stitches are arranged at equal intervals under the three turns. The length of the lower fixing needle 7 located in the middle one turn is smaller than the length of the lower fixing needle on both sides thereof, and the lower fixing needle 7 position of the middle one turn and the center position of the lower mold cavity 51. In the embodiment, the upper fixing pin 8 has only one turn and is located at the center of the upper cavity. In order to better fix the pre-inflated inner tube 2, the distance between two adjacent lower fixing needles 7 on the same circle is set to 10-25 mm, so that the lower fixing needle 7 can evenly hold the inner tube 2 Therefore, the inner tube 2 is not displaced by the action of the centrifugal force during the molding of the tire body 1.

Example 4

A method for producing an explosion-proof stab-resistant tire, first placing a pre-inflated inner tube 2 in a lower mold 5, clamping the inner tube 2 in the lower fixed needle 7, closing the upper mold 6, and then fixing the entire mold to the centrifuge; Warming the mold, turning the mold to 50-80 ° C, turning on the centrifuge, rotating the mold, controlling the rotation speed of the centrifuge at 15 Hz to 40 Hz, and injecting the molding material into the mold through the filling port, the molding used in this embodiment The material is a polyurethane elastomer composite material, such as PTMEG; when the filling is completed, the centrifuge is closed, and the polyurethane elastomer composite material is matured in the mold; finally, the finished product is taken out by mold opening.

Compared with the traditional solid tire, the comfort is poor, the consumables are large, the mass is heavy, the shock absorption effect is poor, or the inflatable tire is easily pierced or puncture. The present invention provides a accommodating cavity in the tire body by accommodating the cavity. The inflatable inner tube is provided to increase the comfort of the tire; and by setting the minimum thickness of the outer side wall of the tire to be more than 8 mm, the puncture and the puncture are effectively prevented, and the safety of the tire is improved.

The above-mentioned embodiments are only intended to explain the present invention, and are not intended to limit the invention, and all the substitutions and changes made to the present invention without creative work are within the scope of the invention and the scope of the claims. Into the scope of protection of the invention patent.

Claims

An explosion-proof stab-resistant tire characterized by comprising:

The tire body is a hollow annular structure, and the tire body is provided with a receiving cavity;

The accommodating cavity has a circular shape;

The tire body includes a first protective wall and a second protective wall, the first protective wall and the second protective wall are fixedly connected to form the tire body, and the thickness of the first protective wall is greater than or equal to the second protection The thickness of the wall, and the thickness of the first protective wall is greater than or equal to 8 mm.
The explosion-proof stab-resistant tire according to claim 1, further comprising:

The inner tube is an annular structure, and the inner tube is provided with an inflation chamber; the inner tube is located in the accommodating cavity, and is closely connected with the tire body;

An inflation head fixedly coupled to the inner tube and in communication with the inflation chamber, the inflation head extending through the tire body to an exterior of the tire body.
The explosion-proof stab-resistant tire according to claim 1, wherein the first protective wall is for directly contacting the ground or close to the ground as compared with the second protective wall.
The explosion-proof stab-resistant tire according to claim 1, wherein the first protection wall and the second protection wall are arc structures, and the first protection wall and the second protection wall are respectively symmetrical structures, and the first The axis of symmetry of the protective wall coincides with the axis of symmetry of the second protective wall.
The explosion-proof stab-resistant tire according to claim 1, wherein the wall thickness gradually decreases from the first protective wall to the second protective wall.
The explosion-proof stab-resistant tire according to claim 5, wherein the second protective wall has a minimum thickness of 8 mm.
The explosion-proof stab-resistant tire according to claim 1, wherein the tire body is directly molded to the outer circumference of the inner tube by a mold.
The explosion-proof stab-resistant tire according to any one of claims 1 to 7, wherein the tire body is provided with an anti-slip pattern.
A mold for an explosion-proof stab-resistant tire, comprising:

a lower mold having an annular lower mold cavity; the lower mold cavity being provided with a lower fixing needle, the lower fixing needle being fixedly connected with the lower mold;

The upper mold is provided with an annular upper mold cavity, the upper mold cavity is matched with the lower mold cavity, and the upper mold cavity is provided with an upper fixing needle, and the upper fixing needle is fixedly connected with the upper mold;

The upper mold is provided with an infusion port;

The lower fixed needle and the upper fixed needle are used to fix the position of the inner tube in the mold during the tire body forming process.
The mold according to claim 9, wherein the lower fixing needle has a plurality of at least three turns, each of which is circumferentially distributed, and the length of the lower fixing needle located in the middle one is smaller than the lower fixing of the two sides thereof. The length of the needle, the lower fixed needle position in the middle of the circle and the center position of the lower mold cavity.
The mold according to claim 10, wherein said three lower fixed pins are arranged at equal intervals.
The mold according to claim 10, wherein the distance between two adjacent lower fixing needles on the same circumference is 10-25 mm.
The mold according to claim 9, wherein said upper fixing needle is located at a center position of the upper mold cavity.
A method for producing an explosion-proof stab-resistant tire, comprising the steps of:

Placing the inner tube in the mold;

Clamping and heating the mold, the temperature is controlled at 50-80 ° C;

Turn on the centrifuge, rotate the mold, and simultaneously inject the elastomer composite;

Turn off the centrifuge to mature the elastomer composite;

Mold.
The production method according to claim 14, wherein the mold is fixed to the centrifuge.