阅读说明：本技术 一种内腔延展周期性波浪式免充气轮胎及其加工方法 (Inner cavity extending periodic wave type inflation-free tire and processing method thereof ) 是由 郁萍 于 2020-12-15 设计创作，主要内容包括：本发明公开了一种内腔延展周期性波浪式免充气轮胎及其加工方法,属于免充气轮胎技术领域领域。本发明的一种内腔延展周期性波浪式免充气轮胎及其加工方法,将混炼好的胶料经过螺杆挤出机挤出胎腹上形成胎腹凹槽的轮胎胚条,再借助工件将轮胎胚条包覆在模芯构件上,以形成内腔凹槽相连形成延展周期性波浪式的内腔,从而保证轮胎既具备传统环腔结构的舒适性,又具备传统囊腔结构的支撑强度。将使用轻质缓冲材料物料B的胎侧部,与使用高耐磨、抗湿滑物料A的胎冠复合,从而尽可能减轻胎体重量、节约成本,还能够保证胎体足够的支撑强度、提高轮胎的使用寿命。(The invention discloses an inner cavity extending periodic wave type inflation-free tire and a processing method thereof, belonging to the technical field of inflation-free tires. The invention relates to an inner cavity extension periodic wave type inflation-free tire and a processing method thereof. The tire side part using the light buffer material B is compounded with the tire crown using the high-wear-resistance and anti-slippery material A, so that the weight of the tire body is reduced as much as possible, the cost is saved, the sufficient support strength of the tire body can be ensured, and the service life of the tire is prolonged.)

1. The utility model provides an inner chamber extension periodic wave formula exempts from pneumatic tire, includes tire embryo strip (1) that extrudees through screw extruder, its characterized in that: tire strip (1) is including child hat (11) and child belly (12), child belly recess (121) have been seted up along its circumference on child belly (12), equal interval is provided with a plurality of groups inner chamber recess (14) along its circumference in child belly recess (121) inside, inner chamber recess (14) end to end form inner chamber (141) of the periodic wave formula of extension.

2. An internally extended periodic undulating non-pneumatic tire as claimed in claim 1, wherein: a crown groove (111) is formed in the crown (11) along the circumferential direction of the crown, and the crown groove (111) is filled with a material A (112).

3. An internally extended periodic undulating non-pneumatic tire as claimed in claim 2, wherein: the material A (112) is a high-wear-resistance and anti-wet-skid tread rubber material.

4. An internally extended periodic undulating non-pneumatic tire according to claim 3 wherein: still include sidewall portion (13), sidewall portion recess (131) have been seted up along its circumference in the middle part of sidewall portion (13), sidewall portion recess (131) intussuseption is filled with material B (132).

5. An internally extended periodic undulating non-pneumatic tire according to claim 4 wherein: the material B (132) is a foaming and other related light buffer materials.

6. A processing method of an inner cavity extending periodic wave type inflation-free tire is characterized by comprising the following steps:

step one, extruding a tire strip (1): extruding the mixed rubber material out of a tire strip (1) with a tire web groove (121) along the circumferential direction of a tire web (12) by using a screw extruder;

step two, preforming preparation: cutting the extruded tire strip (1) into sections according to the size, and then coating the sections on a mold core component (5) by means of a tool, so that the mold core component (5) is embedded into a tire cavity groove (121) at equal intervals along a tire cavity (12);

step three, preforming: placing the tire blank strip (1) in the second step into a preforming mold (2), completely placing the tire blank strip (1) in an upper mold cavity (23) and a lower mold cavity (24), covering an upper mold (21) and a lower mold (22), placing a mold core member head end (51) at the front end of a mold core member (5) in a tire belly groove (121), and reserving a mold core member tail end (52) at the rear end of the mold core member (5) outside the tire blank strip (1) through a mold outlet through hole (25);

step four, injection molding at the tire crown (11): injecting a material A (112) into the crown groove (111) along the injection pipe I (3);

step five, injection molding of the side wall part (13): injecting a material B (132) into the sidewall groove (131) along the injection pipe II (4);

step six, vulcanization molding: vulcanizing the tire blank strip (1) in the preforming mold (2), wherein in the vulcanizing process, the mold core component (5) is left in the tire blank strip (1);

seventhly, taking out the mold core component (5): after the mold core component (5) is taken out along the axial direction of the mold through hole (25), all adjacent cavity grooves (14) formed in the tire belly groove (121) by the mold core component (5) are connected end to form an extended periodic wave-shaped cavity (141);

step eight, demolding: and (3) detaching the upper die (21) and the lower die (22), opening the upper die cavity (23) and the lower die cavity (24), and taking out the molded tire.

7. The method of manufacturing an internally extended periodic undulating non-pneumatic tire as claimed in claim 6, wherein: the horizontal plane projection shape of the mold core component (5) is a semi-ellipse and comprises a mold core component head end (51) and a mold core component tail end (52); the maximum outer diameter of the contact surface of the head end (51) of the mold core component and the tail end (52) of the mold core component is smaller than or equal to the outer diameter of the mold stripping through hole (25).

Technical Field

The invention relates to the technical field of non-pneumatic tires, in particular to an inner cavity extending periodic wave type non-pneumatic tire and a processing method thereof.

Background

The non-pneumatic tire has been widely noticed, popularized and applied because of the advantages of no need of inflation, convenient maintenance, long service life, puncture resistance, wear resistance and the like, and the non-pneumatic tire comprises a non-pneumatic solid tire and a non-pneumatic hollow tire, the traditional molding process is mature for the production of the non-pneumatic solid tire, but the non-pneumatic hollow tire is difficult to finish by the traditional molding process. Meanwhile, the comfort problem of the non-pneumatic tire during riding is not fundamentally solved, and the production process is relatively complex.

Through retrieval, in order to solve the problems, such as Chinese patent, the publication numbers are as follows: CN109109352A, published as: 1 month and 1 day 2019; disclosed is a one-time injection, hollow and vulcanization molding production method of rubber products, which can complete the injection, hollow and vulcanization processes in the same mold cavity, wherein the mold cavity comprises an upper half mold, a lower half mold and a mold core, the mold core lays a foundation for the hollow of the mold cavity, the hollow mold has the condition of filling high-temperature and high-pressure gas required by vulcanization, and further integrates the injection molding, hollow and vulcanization devices, thereby avoiding the heat loss and process flow cost caused by the flow of each process in the prior art, greatly improving the defect of complex process in the traditional process, simplifying the manufacturing process, but through the use of the process, the process can theoretically realize full-automatic production, but when the hollow tire is vulcanized and molded in the actual production process, high-temperature gas or compressed air and the like need to be introduced to heat the inner cavity of the hollow tire, the yield of the hollow tire is found to be low, meanwhile, high-temperature gas or compressed air and the like are needed to be generated in the operation process of equipment, so that potential safety hazards exist, the responsible coefficient of the product implementation process is increased, and large-scale industrial production is difficult to realize.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention provides an inner cavity extended periodic wave type inflation-free tire and a processing method thereof, aiming at the problems that the conventional tire is easy to puncture and cause safety accidents and difficult maintenance, and the like, the invention provides an inner cavity extended periodic wave type inflation-free tire and a processing method thereof.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention provides an inner cavity extension periodic wave type inflation-free tire, which comprises a tire strip extruded by a screw extruder, wherein the tire strip comprises a tire crown and a tire web, a tire web groove is formed in the tire web along the circumferential direction of the tire web, a plurality of groups of inner cavity grooves are arranged in the tire web groove at equal intervals along the circumferential direction of the tire web groove, and the inner cavity grooves are connected end to form an extension periodic wave type inner cavity, so that the tire provided by the invention has the comfort of a traditional annular cavity structure and the support strength of a traditional bag cavity structure.

According to the further technical scheme, a tire crown groove is formed in the tire crown along the circumferential direction of the tire crown, a material A is filled in the tire crown groove, and the material A is a high-wear-resistance and anti-wet-skid tread rubber material, so that the problems that the tire jumps due to uneven tire joints in the mold pressing process, even the tire cracks to cause potential safety hazards, and the problems of elimination or early warning and the like can be solved.

The technical scheme is further that the tire comprises a tire side portion, a tire side portion groove is formed in the middle of the tire side portion along the circumferential direction of the tire side portion, a material B is filled in the tire side portion groove, the material B is a foaming and other related light buffer materials, the tire side portion which is not in contact with the ground uses the light buffer materials, and is compounded with a tire crown which uses high-wear-resistance and anti-wet-skid tire tread rubber materials, so that the weight of the tire body is reduced as much as possible, the cost is saved, the sufficient supporting strength of the tire body can be guaranteed, and the service life of the tire is prolonged.

A processing method of an inner cavity extending periodic wave type inflation-free tire comprises the following steps:

step one, extruding a tire strip: extruding the mixed rubber material by a screw extruder to form a tire strip with a tire web groove formed on the tire web along the circumferential direction of the tire web;

step two, preforming preparation: cutting the extruded tire strip into sections according to the size, and then coating the sections on a mold core component by means of a tool, so that the mold core component is embedded into a tire cavity groove at equal intervals along a tire cavity, the tire cavity groove can ensure that the mold core component is accurately aligned and inserted, and can play a role in limiting and clamping so as to ensure the smooth proceeding of a subsequent molding process;

step three, preforming: placing the tire blank strip in the second step into a preforming mold, completely placing the tire blank strip in the upper mold cavity and the lower mold cavity, and then covering the upper mold and the lower mold, so that the head end of the mold core component at the front end of the mold core component is placed in the tire cavity groove, and the tail end of the mold core component at the rear end of the mold core component is reserved outside the tire blank strip through a mold outlet through hole, so that the mold core component can be taken out conveniently, and the energy consumption generated by taking and placing the mold core component in the mold opening process is reduced;

step four, injection molding at the tire crown: injecting a material A into the crown groove along the injection pipe I, wherein the material A is a high-wear-resistance and anti-slippery tread rubber material;

step five, injection molding of the tire side part: injecting a material B into the groove of the side part of the tire along the injection pipe II, wherein the material B is a foaming and other related light buffer materials;

step six, vulcanization molding: vulcanizing the tire blank strip in the preforming mold, wherein in the vulcanizing process, the mold core component is retained in the tire blank strip so as to avoid the dimensional tolerance of the tire belly groove precision in the vulcanizing reaction;

step seven, taking out the mold core component: after the mold core member is taken out along the axial direction of the mold outlet through hole, all adjacent inner cavity grooves formed in the tire web grooves by the mold core member are connected end to form an extended periodic wave-shaped inner cavity, so that the effects of strengthening the structural strength of the tire and improving the buffering capacity of the tire body are achieved, the riding comfort is further enhanced, and the riding power consumption is saved;

step eight, demolding: and (4) dismantling the upper die and the lower die, opening the upper die cavity and the lower die cavity, and taking out the molded tire.

According to a further technical scheme, the horizontal plane projection shape of the mold core component is a semi-ellipse and comprises a mold core component head end and a mold core component tail end; the maximum outer diameter of the contact surface of the head end of the mold core member and the tail end of the mold core member is smaller than or equal to the outer diameter of the mold stripping through hole, so that the head end of the mold core member is easy to pull out from the mold stripping through hole.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the inner cavity extension periodic wave type inflation-free tire and the processing method thereof, mixed rubber materials are extruded out of a tire strip forming a tire cavity groove on a tire cavity through a screw extruder, and then the tire strip is coated on a mold core component through a workpiece, so that the mold core component is embedded into the tire cavity groove at equal intervals to form a plurality of groups of inner cavity grooves, the tire cavity groove can ensure that the mold core component is accurately aligned and inserted, and can also play a role in limiting and clamping so as to ensure the smooth proceeding of a subsequent forming process; the inner cavity grooves are connected to form an extended periodic wave type inner cavity, so that the tire is ensured to have the comfort of the traditional annular cavity structure and the support strength of the traditional bag cavity structure;

(2) the invention relates to an inner cavity extended periodic wave type inflation-free tire and a processing method thereof.A horizontal plane projection shape of a mold core member is a semiellipse and comprises a mold core member head end and a mold core member tail end; the maximum outer diameter of the contact surface of the head end of the mold core member and the tail end of the mold core member is smaller than or equal to the outer diameter of the mold stripping through hole, so that the head end of the mold core member is easy to pull out from the mold stripping through hole.

(3) The invention relates to an inner cavity extension periodic wave type inflation-free tire and a processing method thereof, wherein a tire strip comprises a tire crown, a tire crown groove is formed in the tire crown along the circumferential direction of the tire crown, a material A is filled in the tire crown groove, and the material A is a high-wear-resistance and anti-wet-skid tread rubber material, so that the problems of tire jumping caused by uneven tire joints in a mold pressing process, even potential safety hazards caused by fracture, elimination of the potential safety hazards, early warning and the like can be solved;

(4) the invention relates to an inner cavity extension periodic wave type inflation-free tire and a processing method thereof, and the tire also comprises a tire side part, wherein a tire side part groove is formed in the middle of the tire side part along the circumferential direction of the tire side part, a material B is filled in the tire side part groove, the material B is a foaming and other related light buffer materials, the tire side part which is not in contact with the ground is made of the light buffer materials, and is compounded with a tire crown made of a high-wear-resistance and anti-wet-skid tread rubber material, so that the weight of a tire body is reduced as much as possible, the cost is saved, the sufficient supporting strength of the tire body can be ensured, and.

Drawings

FIG. 1 is a schematic perspective view of an inflation-free dual density layer tire of the present invention;

FIG. 2 is a schematic diagram of the non-pneumatic dual density layer tire of FIG. 1 after filling with material;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a schematic view of the longitudinal cut-away structure of FIG. 1;

FIG. 5 is a schematic view of the cross-sectional structure of FIG. 1;

FIG. 6 is a schematic view of a longitudinal cut-away structure of the filled material of FIG. 4;

FIG. 7 is a longitudinal sectional view of the recess of the cavity groove in FIG. 5;

FIG. 8 is a schematic structural view of an inflation-free dual density layer tire forming mold of the present invention;

fig. 9 is a schematic view of a middle mold core member of the present invention.

In the figure: 1-tire strip, 2-preforming mold, 3-injection tube I, 4-injection tube II, 5-mold core component, 11-tire crown, 12-tire belly, 13-tire side, 14-inner cavity groove, 21-upper mold, 22-lower mold, 23-upper mold cavity, 24-lower mold cavity, 25-mold through hole, 51-mold core component head end, 52-mold core component tail end, 111-tire crown groove, 112-material A, 121-tire belly groove, 131-tire side groove, 132-material B, 141-inner cavity, 142-bulge and 143-depression.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Example 1

The inner cavity extended periodic wave type non-pneumatic tire of the embodiment, as shown in fig. 2, comprises a tire strip 1 extruded by a screw extruder, wherein the tire strip 1 comprises a tire crown 11 and a tire bead 12, as shown in fig. 4 to 5, a tire bead groove 121 is formed in the tire bead 12 along the circumferential direction thereof, a plurality of groups of inner cavity grooves 14 are arranged in the tire bead groove 121 at equal intervals along the circumferential direction thereof, the inner cavity grooves 14 are connected end to form an extended periodic wave type inner cavity 141, as shown in fig. 6 to 7, in the riding process, a wave type convex part 142 is in a round and smooth ellipsoid shape (ellipsoid and flat); the spaced depressions 143 are recessed inwardly from the projections 142 and become thinner and thicker, so that the tire of the present invention has both the comfort of the conventional toroidal structure and the support strength of the conventional bladder structure.

Example 2

The basic structure of the non-pneumatic tire with an extended periodic wave inner cavity of the present embodiment is the same as that of embodiment 1, and the differences and improvements are that: as shown in fig. 1, 3 and 6, a tire crown groove 111 is formed in the tire crown 11 along the circumferential direction, a material a112 is filled in the tire crown groove 111, and the material a112 is a high-wear-resistance and anti-wet-skid tread rubber material, so that the problems of tire jumping, even fracture, potential safety hazard caused by uneven tire joints in a molding process, elimination or early warning of the potential safety hazard can be solved.

As shown in fig. 4 and 6, the tire further comprises a sidewall portion 13, a sidewall portion groove 131 is formed in the middle of the sidewall portion 13 along the circumferential direction of the sidewall portion, a material B132 is filled in the sidewall portion groove 131, the material B132 is a foaming and other related light buffer materials, the sidewall portion 13 which is not in contact with the ground is made of the light buffer material, and is compounded with the tire crown 11 made of a high-wear-resistance and anti-wet-skid tread rubber material, so that the weight of the tire body is reduced as much as possible, the cost is saved, the sufficient support strength of the tire body can be ensured, and the service life of the tire is prolonged.

Example 3

The basic structure of the method for processing the non-pneumatic tire with the periodically-wavy inner cavity extending structure of the present embodiment is the same as that of embodiment 2, and the differences and improvements are as follows: as shown in fig. 4 to 8, the method comprises the following steps:

step one, extruding a tire strip 1: extruding the mixed rubber material out of a tire strip 1 with a tire web groove 121 formed in the tire web 12 along the circumferential direction by using a screw extruder;

step two, preforming preparation: cutting the extruded tire blank strip 1 into sections according to the size, and then coating the sections on a mold core member 5 by means of a tool, so that the mold core member 5 is embedded into a tire cavity groove 121 at equal intervals along a tire cavity 12, the tire cavity groove 121 can ensure that the mold core member 5 is accurately aligned and inserted, and can play a role in limiting and clamping so as to ensure that the subsequent molding process is smoothly carried out;

step three, preforming: placing the tire blank strip 1 in the step two in a preforming mold 2, enabling the tire blank strip 1 to be completely placed in the upper mold cavity 23 and the lower mold cavity 24, and then covering the upper mold 21 and the lower mold 22, enabling the head end 51 of the mold core member at the front end of the mold core member 5 to be placed in the tire cavity groove 121, and enabling the tail end 52 of the mold core member at the rear end of the mold core member 5 to be reserved outside the tire blank strip 1 through the mold outlet through hole 25, so that the mold core member 5 can be taken out conveniently, and energy consumption generated by taking and placing the mold core member 5 in an open mold is reduced;

step four, injection molding at the tire crown 11: injecting a material A112 into the crown groove 111 along an injection pipe I3, wherein the material A112 is a high-wear-resistance and anti-wet-skid tread rubber material;

step five, injection molding of the side wall part 13: injecting a material B132 into the side wall part groove 131 along an injection pipe II4, wherein the material B132 is a foaming and other related light buffer materials;

step six, vulcanization molding: vulcanizing the tire blank strip 1 in the preforming mold 2, wherein in the vulcanizing process, the mold core member 5 is retained in the tire blank strip 1 so as to avoid the dimensional tolerance of the precision of the tire belly groove 121 in the vulcanizing reaction;

step seven, taking out the mold core component 5: after the mold core member 5 is taken out along the axial direction of the mold stripping through hole 25, the adjacent inner cavity grooves 14 formed in the tire belly groove 121 by the mold core member 5 are connected end to form an inner cavity 141 with a spreading periodic wave form, so that the effects of strengthening the structural strength of the tire and improving the buffering capacity of the tire body are achieved, the riding comfort is further enhanced, and the riding power consumption is saved;

step eight, demolding: the upper mold 21 and the lower mold 22 are removed, the upper mold cavity 23 and the lower mold cavity 24 are opened, and the molded tire is taken out.

In the embodiment, the distance between the tire belly 12 (the bottom surface where the tire is attached to the rim) and the tire crown 11 is less than or equal to the distance between the corresponding mold cavities, so as to ensure that a gap is reserved in the circumferential direction after the tire strip 1 is placed in the upper mold cavity 23 and the lower mold cavity 24; the distance (vertical thickness) between the sidewall portions 13 is larger than the height of the upper cavity 23 and the lower cavity 24 after the mold is closed. When the mold is closed, the pressure of the upper mold 21 and the lower mold 22 enables the tire strip 1 to complete deformation under constraint force (namely, the tire belly groove 121 can be omni-directionally engaged with the mold core member 5 in the groove while ensuring that the mold cavity is filled with rubber materials), so as to ensure the integrity and unification of the internal structure and the tire body of the tire strip 1.

Example 4

The basic structure of the method for processing the non-pneumatic tire with the periodically-wavy inner cavity extending is the same as that of the embodiment 3, and the differences and improvements are that: as shown in fig. 8, the horizontal projection shape of the core member 5 is a semi-ellipse, and includes a core member head end 51 and a core member tail end 52; the maximum outer diameter of the contact surface of the head end 51 of the mold core component and the tail end 52 of the mold core component is less than or equal to the outer diameter of the mold through hole 25, so that the head end 51 of the mold core component is easy to pull out from the mold through hole 25.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.