阅读说明：本技术 实心轮胎的生产方法 (Method for producing solid tyre ) 是由 赵会岩 王顺利 赵海林 张学永 刘涛 于 2019-11-27 设计创作，主要内容包括：本发明公开了实心轮胎的生产方法,涉及实心轮胎生产技术领域。聚氨酯内层(1)是形如实心轮胎的实体结构,纤维骨架层(2)附着在聚氨酯内层(1)的外环胎冠面上,天然胶外层包裹在纤维骨架层(2)和聚氨酯内层(1)的外侧；S1、浇注出聚氨酯内层(1)；S2、纤维骨架层(2)沿着圆周方向紧紧贴在聚氨酯内层(1)的外环胎冠面上,形成预制体(10)；S3、预制体(10)置于实心轮胎模具(4)的型腔中；S4、浇注液态橡胶,得到实心轮胎。与现有技术相比,本发明中的有益效果：在聚氨酯内层的外侧加设纤维骨架层,有效防止聚氨酯内层的变形,提高实心轮胎整体的强度；采用二次浇注的方法制备实心轮胎,提高实心轮胎的整体均匀性。(The invention discloses a production method of a solid tire, and relates to the technical field of solid tire production. The polyurethane inner layer (1) is a solid structure like a solid tire, the fiber framework layer (2) is attached to the outer ring tire crown surface of the polyurethane inner layer (1), and the natural rubber outer layer is wrapped on the outer sides of the fiber framework layer (2) and the polyurethane inner layer (1); s1, pouring out the polyurethane inner layer (1); s2, tightly attaching the fiber framework layer (2) to the outer ring tread surface of the polyurethane inner layer (1) along the circumferential direction to form a prefabricated body (10); s3, placing the prefabricated body (10) in a cavity of a solid tire mold (4); and S4, pouring liquid rubber to obtain the solid tire. Compared with the prior art, the invention has the beneficial effects that: the fiber framework layer is additionally arranged on the outer side of the polyurethane inner layer, so that the deformation of the polyurethane inner layer is effectively prevented, and the integral strength of the solid tire is improved; the solid tire is prepared by adopting a secondary pouring method, so that the integral uniformity of the solid tire is improved.)

1. A method for producing a solid tire, characterized in that,

the method comprises the following steps: the tire is characterized by comprising a polyurethane inner layer (1), a fiber framework layer (2) and a natural rubber outer layer, wherein the polyurethane inner layer (1) is of a solid structure like a solid tire, the fiber framework layer (2) is attached to the outer ring tire crown surface of the polyurethane inner layer (1), and the natural rubber outer layer is wrapped on the outer sides of the fiber framework layer (2) and the polyurethane inner layer (1);

the method comprises the following steps:

s1, preparing liquid polyurethane, pouring the liquid polyurethane into a mold cavity of the polyurethane inner layer (1), vulcanizing, opening the mold and taking out the polyurethane inner layer (1);

s2, coating an adhesive on the crown surface of the outer ring of the polyurethane inner layer (1), and tightly attaching the fiber framework layer (2) to the crown surface of the outer ring of the polyurethane inner layer (1) along the circumferential direction to form a prefabricated body (10);

s3, placing the preform (10) in a cavity of a solid tire mold (4), wherein a liquid channel is arranged between the inner wall of the cavity of the solid tire mold (4) and the outer wall of the preform (10), the outer wall of a pattern block (502) on a pattern column (5) is in contact with the inner annular wall of the preform (10), and a channel is arranged between a pattern groove (503) and the inner annular wall of the preform (10);

s4, preparing liquid rubber, pouring the liquid rubber into a cavity of a solid tire mold (4), vulcanizing, opening the mold, taking out, ejecting the pattern columns (5), and trimming to obtain the solid tire.

2. The process for the production of solid tyres according to claim 1, characterized in that the liquid polyurethane preparation process: firstly, diisocyanate, polyether polyol, castor oil, butanediol, trimethylolpropane, epoxy resin, dimethylolpropionic acid, N-methyl pyrrolidone, acetone, azodiisobutyronitrile, dibutyltin dilaurate, a film forming auxiliary agent, a flatting agent and a thickening agent react to form pre-polyurethane, and then the pre-polyurethane is neutralized by triethylamine, emulsified in water at 55 ℃ and subjected to ethylenediamine chain extension to obtain polyurethane emulsion; heating the polyurethane emulsion to 80-90 ℃, uniformly dropwise adding azodiisobutyronitrile solution within 2.5h, keeping the temperature for 3h, cooling, discharging, and filtering by using a 200-mesh screen to obtain filtrate, namely liquid polyurethane.

3. The method for producing a solid tire according to claim 1, wherein the rubber is prepared in a liquid state by: firstly, 80-100 parts of natural rubber, 10-30 parts of butadiene rubber, 40-60 parts of carbon black, 2-5 parts of zinc oxide, 3-5 parts of stearic acid, 3-5 parts of sulfur, 1-3 parts of accelerator, 0.2-0.7 part of anti-scorching agent and 1-3 parts of anti-aging agent are subjected to rubber mixing to obtain rubber strips, the rubber strips are added into the injection agent and heated to a molten state, and the rubber strips are sheared and stirred by a screw rod and a charging barrel of the injection machine to form continuous, uniform and liquid rubber.

4. A method for producing a solid tyre as claimed in claim 1, wherein the inner surface of the mould cavity of the inner layer (1) of polyurethane is smooth.

5. The method for producing a solid tire according to claim 1,

the solid tire mold (4) comprises a pattern column (5), an upper mold (6) and a lower mold (7), the pattern column (5) is arranged in the middle of the inner parts of the upper mold (6) and the lower mold (7), and a cavity formed between the outer wall of the pattern column (5) and the inner walls of the upper mold (6) and the lower mold (7) has the same size as that of a solid tire to be prepared;

the side surface of a column body (501) of the pattern column (5) is provided with outward convex pattern blocks (502), and a pattern groove (503) is formed between the adjacent pattern blocks (502); the upper surface and the lower surface of the cylinder (501) are respectively provided with a groove (504) and a positioning groove (505), and the positioning groove (505) is connected on the groove (504);

a first large bulge (604) is downwards arranged in the upper die (6), and the thickness of the first large bulge (604) is equal to that of the outer layer of the natural rubber; a first small bulge (605) and a first positioning key (606) are arranged in the middle of the bottom of the first large bulge (604); the first small bulge (605) and the first positioning key (606) are respectively matched with a groove (504) and a positioning groove (505) above the pattern column (5);

a second big bulge (703) is arranged above the inner part of the lower die (7), and the thickness of the second big bulge (703) is equal to that of the outer layer of the natural rubber; a second small bulge (704) and a second positioning key (705) are arranged in the middle of the upper part of the second large bulge (703); the second small bulge (704) and the second positioning key (705) are respectively matched with a groove (504) and a positioning groove (505) below the pattern column (5);

a pouring port (603) for pouring liquid rubber is arranged above the upper die (6), and the pouring port (603) is communicated with a closed cavity formed by the upper die (6) and the lower die (7).

6. A method of producing a solid tire as in claim 5, wherein the first large protrusion (604) and the second large protrusion (703) have blocks (502) on the sides thereof, and a groove (503) is formed between the adjacent blocks (502).

7. A method for producing a solid tire as claimed in claim 6, wherein the first large protrusions (604) have an outer diameter not larger than the inner diameter of the inner polyurethane layer (1), and the second large protrusions (703) have an outer diameter not larger than the inner diameter of the inner polyurethane layer (1).

8. A method for producing solid tyres as claimed in claim 5, wherein above the upper mould (6) there are provided a first inlet pipe (601) and a first outlet pipe (602) for the inlet and outlet of a heat-supplying medium; a second inlet pipe (701) and a second outlet pipe (702) for heat supply media to enter and exit are arranged at the bottom of the lower die (7); a heat medium channel is arranged inside the wall of the upper die (6) and the lower die (7).

9. A method for producing a solid tyre as claimed in claim 5, wherein the height of the columns (501) is equal to the height of the preforms (10).

10. A method for producing a solid tyre as claimed in claim 5, wherein the upper die (6) and the lower die (7) are fastened together by means of bolts (8) and nuts (9).

Technical Field

The invention relates to the technical field of solid tire production, in particular to a production method of a solid tire.

Background

The solid tyre is a kind of tyre corresponding to the pneumatic tyre (hollow tyre), and its tyre body is solid, and because of its advantages of good puncture resistance and no need of inflation, it is mainly used in the fields of mineral exploitation, engineering construction and goods transportation. The solid tire has low strength due to single material, simple structure and the like, and can be generally used only under the condition of low speed.

The production method of the solid tyre can be a rubber strip filling vulcanization method, a one-step casting molding method and a preforming vulcanization method. The adhesive tape filling and vulcanizing method is to directly fill adhesive tapes into the mold cavity and then to mold and vulcanize; the one-step casting molding is to directly cast the liquid raw material into a mold cavity for vulcanization; the preforming and vulcanizing method is to adopt a forming process similar to that of a hollow tire, firstly attach the film layer to perform a tire blank, and then put the tire blank into a mold cavity to perform mold closing and vulcanizing. Wherein, the integral uniformity of the tire molded by one-time casting is high.

The Chinese patent with the publication number of CN104526928B, 22.2.2017 and the name of 'mould for polyurethane solid tyre and processing method thereof' discloses a mould for polyurethane solid tyre and a processing method for polyurethane solid tyre at the same time. The polyurethane material is easy to deform when stressed or subjected to temperature change, and the polyurethane material is not restricted by a framework structure, so that the application of the polyurethane material is seriously limited.

Disclosure of Invention

The invention provides a production method of a solid tire, which is characterized in that a fiber framework layer is added in the solid tire, and a secondary casting molding method is adopted to solve the technical problem.

The specific technical scheme is that the production method of the solid tire comprises the following steps: the tire comprises a polyurethane inner layer, a fiber framework layer and a natural rubber outer layer, wherein the polyurethane inner layer is of a solid structure like a solid tire, the fiber framework layer is attached to the outer ring tire crown surface of the polyurethane inner layer, and the natural rubber outer layer is wrapped on the outer sides of the fiber framework layer and the polyurethane inner layer;

the method comprises the following steps:

s1, preparing liquid polyurethane, pouring the liquid polyurethane into a mold cavity of the inner polyurethane layer, vulcanizing, opening the mold and taking out the inner polyurethane layer;

s2, coating an adhesive on the crown surface of the outer ring of the inner polyurethane layer, and tightly attaching the fiber framework layer to the crown surface of the outer ring of the inner polyurethane layer along the circumferential direction to form a prefabricated body;

s3, placing the prefabricated body in a cavity of a solid tire mold, wherein a liquid channel is arranged between the inner wall of the cavity of the solid tire mold and the outer wall of the prefabricated body, the outer wall of a pattern block on a pattern column is in contact with the inner annular wall of the prefabricated body, and a channel is arranged between a pattern groove and the inner annular wall of the prefabricated body;

and S4, preparing liquid rubber, pouring the liquid rubber into a cavity of the solid tire mold, vulcanizing, opening the mold, taking out, ejecting the pattern columns, and trimming to obtain the solid tire.

Further, the liquid polyurethane preparation method comprises the following steps: firstly, diisocyanate, polyether polyol, castor oil, butanediol, trimethylolpropane, epoxy resin, dimethylolpropionic acid, N-methyl pyrrolidone, acetone, azodiisobutyronitrile, dibutyltin dilaurate, a film forming auxiliary agent, a flatting agent and a thickening agent react to form pre-polyurethane, and then the pre-polyurethane is neutralized by triethylamine, emulsified in water at 55 ℃ and subjected to ethylenediamine chain extension to obtain polyurethane emulsion; heating the polyurethane emulsion to 80-90 ℃, uniformly dropwise adding azodiisobutyronitrile solution within 2.5h, keeping the temperature for 3h, cooling, discharging, and filtering by using a 200-mesh screen to obtain filtrate, namely liquid polyurethane.

Further, the liquid rubber preparation method comprises the following steps: firstly, 80-100 parts of natural rubber, 10-30 parts of butadiene rubber, 40-60 parts of carbon black, 2-5 parts of zinc oxide, 3-5 parts of stearic acid, 3-5 parts of sulfur, 1-3 parts of accelerator, 0.2-0.7 part of anti-scorching agent and 1-3 parts of anti-aging agent are subjected to rubber mixing to obtain rubber strips, the rubber strips are added into the injection agent and heated to a molten state, and the rubber strips are sheared and stirred by a screw rod and a charging barrel of the injection machine to form continuous, uniform and liquid rubber.

Further, the inner surface of the mold cavity of the polyurethane inner layer is smooth. The surface of the inner layer of the produced polyurethane has no pattern and is smooth, and the inner layer of the polyurethane is a transitional semi-finished product.

Further, the solid tire mold comprises a pattern column, an upper mold and a lower mold, the pattern column is arranged in the middle of the inner parts of the upper mold and the lower mold, and a cavity formed between the outer wall of the pattern column and the inner walls of the upper mold and the lower mold is the same as the size of the solid tire to be prepared;

the side surface of the column body of the pattern column is provided with outward convex pattern blocks, and pattern grooves are formed between the adjacent pattern blocks; the upper surface and the lower surface of the column body are respectively provided with a groove and a positioning groove, and the positioning groove is connected on the groove;

a first large bulge is downwards arranged in the upper die, and the thickness of the first large bulge is equal to that of the outer layer of the natural rubber; a first small bulge and a first positioning key are arranged in the middle of the bottom of the first large bulge; the first small bulge and the first positioning key are respectively matched with the groove and the positioning groove above the pattern column;

a second large bulge is arranged above the inner part of the lower die, and the thickness of the second large bulge is equal to that of the outer layer of the natural rubber; a second small bulge and a second positioning key are arranged in the middle above the second large bulge; the second small bulge and the second positioning key are respectively matched with the groove and the positioning groove below the pattern column;

and a pouring port for pouring liquid rubber is formed above the upper die, and the pouring port is communicated with a closed cavity formed by combining the upper die and the lower die.

The poured liquid rubber flows into a cavity formed between the outer wall of the pattern column and the inner walls of the upper mold and the lower mold, the liquid rubber is basically not present at the contact part of the outer wall of the pattern block and the inner annular wall of the prefabricated body, the liquid rubber is present at the outer sides of other fiber framework layers and the inner polyurethane layer between the pattern groove and the inner annular wall of the prefabricated body, the pouring amount of the liquid rubber is reasonably controlled, and the uniform and compact outer natural rubber layer can be formed at the outer sides of the fiber framework layers and the inner polyurethane layer.

Further, the side surfaces of the first large bulge and the second large bulge are provided with pattern blocks, and pattern grooves are formed between the adjacent pattern blocks. The grooves form liquid rubber channels to facilitate the liquid rubber to flow between the grooves and the inner ring wall of the prefabricated body.

Furthermore, the outer diameter of the first large bulge is less than or equal to the inner diameter of the polyurethane inner layer, and the outer diameter of the second large bulge is less than or equal to the inner diameter of the polyurethane inner layer. When the outer diameter of the first large projection and the outer diameter of the second large projection are equal to the inner diameter of the polyurethane inner layer, the inner sidewall of the solid tire can be directly formed when the pattern columns are ejected in S4. When the outer diameter of the first large bulge is smaller than the inner diameter of the polyurethane inner layer or the outer diameter of the second large bulge is smaller than the inner diameter of the polyurethane inner layer, the natural rubber outer layer at the inner ring wall of the solid tire can be partially removed to form the inner ring wall of the solid tire when the pattern columns are ejected.

Further, a first inlet pipe and a first outlet pipe for heat supply media to enter and exit are arranged above the upper die; a second inlet pipe and a second outlet pipe for the heat supply medium to enter and exit are arranged at the bottom of the lower die; a heat medium passage is provided inside the walls of the upper mold and the lower mold. Compare in the outside heating equipment such as heating jacket that sets up, directly set up the hot medium passageway on the lateral wall of last mould and bed die, when heating the vulcanization to the natural rubber skin, more energy saving, heat transfer effect is good.

Further, the height of the column is equal to the height of the preform. When the mold is filled, the pattern column is filled into the inner ring of the prefabricated body firstly, the pattern column and the inner ring are aligned up and down, and then the pattern column is put into the upper mold and the lower mold, so that the mold is filled conveniently, and the up-and-down position of the prefabricated body between the upper mold and the lower mold is controlled.

Furthermore, the upper die and the lower die are fixedly connected through bolts and nuts.

Compared with the prior art, the invention has the advantages that,

1) the structure of the solid tire is changed, and the fiber framework layer is additionally arranged on the outer side of the polyurethane inner layer, so that the deformation of the polyurethane inner layer can be effectively prevented, and the overall strength of the solid tire can be improved;

2) the solid tire is prepared by adopting a secondary pouring method, so that the integral uniformity of the solid tire is improved; when the liquid rubber is vulcanized, the polyurethane inner layer and the fiber framework layer are heated simultaneously, so that the bonding force between the polyurethane inner layer and the fiber framework layer, between the polyurethane inner layer and the natural rubber outer layer, and between the fiber framework layer and the natural rubber outer layer can be enhanced;

3) the outer layer of the natural rubber is formed on the outer side of the solid tire, so that the driving comfort of the solid tire in use can be improved.

Drawings

FIG. 1 is a schematic view of the structure of a preform according to the present invention;

FIG. 2 is a schematic structural view of a solid tire mold used in pouring liquid rubber in the present invention;

FIG. 3 is a front view of a solid tire mold;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;

FIG. 6 is a schematic view of a pattern post structure;

FIG. 7 is a schematic view of an upper mold structure;

FIG. 8 is a schematic view of the structure of the lower mold.

1. The tire comprises a polyurethane inner layer, a fiber framework layer, a solid tire mold, a pattern column, an upper mold, a lower mold, a bolt, a nut, a prefabricated body and a tire body, wherein the polyurethane inner layer comprises 2 parts of a fiber framework layer, 4 parts of a solid tire mold, 5 parts of a pattern column, 6 parts of an upper mold, 7 parts of a;

501. column 502, pattern block 503, pattern groove 504, groove 505, positioning groove;

601. a first inlet pipe 602, a first outlet pipe 603, a pouring gate 604, a first big protrusion 605, a first small protrusion 606 and a first positioning key;

701. a second inlet pipe 702, a second outlet pipe 703, a second big protrusion 704, a second small protrusion 705 and a second positioning key.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications, proportions, changes, and variations of the structures, and dimensions which are within the scope of the present disclosure are not to be considered as limiting the present disclosure.

In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1-8, a method of producing a solid tire includes: the tire comprises a polyurethane inner layer 1, a fiber framework layer 2 and a natural rubber outer layer, wherein the polyurethane inner layer 1 is of a solid structure like a solid tire, the fiber framework layer 2 is attached to the outer ring tire crown surface of the polyurethane inner layer 1, and the natural rubber outer layer is wrapped on the outer sides of the fiber framework layer 2 and the polyurethane inner layer 1;

the method comprises the following steps:

s1, preparing liquid polyurethane, pouring the liquid polyurethane into a mold cavity of the polyurethane inner layer 1, vulcanizing, opening the mold and taking out the polyurethane inner layer 1;

s2, coating an adhesive on the crown surface of the outer ring of the polyurethane inner layer 1, and tightly attaching the fiber framework layer 2 to the crown surface of the outer ring of the polyurethane inner layer 1 along the circumferential direction to form a prefabricated body 10;

s3, placing the preform 10 in a cavity of a solid tire mold 4, wherein a liquid channel is arranged between the inner wall of the cavity of the solid tire mold 4 and the outer wall of the preform 10, the outer wall of a pattern block 502 on a pattern column 5 is in contact with the inner annular wall of the preform 10, and a channel is arranged between a pattern groove 503 and the inner annular wall of the preform 10;

and S4, preparing liquid rubber, pouring the liquid rubber into a cavity of the solid tire mold 4, vulcanizing, opening the mold, taking out, ejecting the pattern columns 5, and trimming to obtain the solid tire.

The preparation method of the liquid polyurethane comprises the following steps: firstly, diisocyanate, polyether polyol, castor oil, butanediol, trimethylolpropane, epoxy resin, dimethylolpropionic acid, N-methyl pyrrolidone, acetone, azodiisobutyronitrile, dibutyltin dilaurate, a film forming auxiliary agent, a flatting agent and a thickening agent react to form pre-polyurethane, and then the pre-polyurethane is neutralized by triethylamine, emulsified in water at 55 ℃ and subjected to ethylenediamine chain extension to obtain polyurethane emulsion; heating the polyurethane emulsion to 80-90 ℃, uniformly dropwise adding azodiisobutyronitrile solution within 2.5h, keeping the temperature for 3h, cooling, discharging, and filtering by using a 200-mesh screen to obtain filtrate, namely liquid polyurethane.

The preparation method of the liquid rubber comprises the following steps: firstly, 80-100 parts of natural rubber, 10-30 parts of butadiene rubber, 40-60 parts of carbon black, 2-5 parts of zinc oxide, 3-5 parts of stearic acid, 3-5 parts of sulfur, 1-3 parts of accelerator, 0.2-0.7 part of anti-scorching agent and 1-3 parts of anti-aging agent are subjected to rubber mixing to obtain rubber strips, the rubber strips are added into the injection agent and heated to a molten state, and the rubber strips are sheared and stirred by a screw rod and a charging barrel of the injection machine to form continuous, uniform and liquid rubber.

The inner surface of the mold cavity of the polyurethane inner layer 1 is smooth. The surface of the manufactured polyurethane inner layer 1 has no patterns and is smooth, and the polyurethane inner layer 1 is a transitional semi-finished product.

The solid tire mold 4 comprises a pattern column 5, an upper mold 6 and a lower mold 7, wherein the pattern column 5 is arranged in the middle of the inner parts of the upper mold 6 and the lower mold 7, and a cavity formed between the outer wall of the pattern column 5 and the inner walls of the upper mold 6 and the lower mold 7 has the same size as that of a solid tire to be prepared;

the side surface of a column body 501 of the pattern column 5 is provided with blocks 502 which are protruded outwards, and a groove 503 is formed between the adjacent blocks 502; the upper and lower surfaces of the cylinder 501 are respectively provided with a groove 504 and a positioning groove 505, and the positioning groove 505 is connected on the groove 504;

a first big bulge 604 is arranged downwards in the upper die 6, and the thickness of the first big bulge 604 is equal to that of the outer layer of the natural rubber; a first small bulge 605 and a first positioning key 606 are arranged in the middle of the bottom of the first large bulge 604; the first small projection 605 and the first positioning key 606 are respectively matched with the groove 504 and the positioning groove 505 above the pattern column 5;

a second big bulge 703 is arranged above the inner part of the lower die 7, and the thickness of the second big bulge 703 is equal to that of the outer layer of the natural rubber; a second small bulge 704 and a second positioning key 705 are arranged in the middle of the upper part of the second large bulge 703; the second small bulge 704 and the second positioning key 705 are respectively matched with the groove 504 and the positioning groove 505 below the pattern column 5;

a pouring port 603 for pouring liquid rubber is arranged above the upper die 6, and the pouring port 603 is communicated with a closed cavity formed by the upper die 6 and the lower die 7.

The first large protrusion 604 and the second large protrusion 703 have blocks 502 on the sides thereof, and a groove 503 is formed between the adjacent blocks 502. The groove 503 forms a channel for the liquid rubber to flow between the groove 503 and the inner annular wall of the preform 10.

The outer diameter of the first large protrusion 604 is not more than the inner diameter of the polyurethane inner layer 1, and the outer diameter of the second large protrusion 703 is not more than the inner diameter of the polyurethane inner layer 1. When the outer diameter of the first large protrusion 604 and the outer diameter of the second large protrusion 703 are equal to the inner diameter of the polyurethane inner layer 1, the inner circumferential wall of the solid tire can be directly formed when the pattern pillars 5 are ejected in S4. When the outer diameter of the first large protrusion 604 is smaller than the inner diameter of the inner polyurethane layer 1 or the outer diameter of the second large protrusion 703 is smaller than the inner diameter of the inner polyurethane layer 1, the outer natural rubber layer at the inner annular wall of the solid tire is partially removed to form the inner annular wall of the solid tire when the pattern columns 5 are ejected.

A first inlet pipe 601 and a first outlet pipe 602 for heat supply medium to enter and exit are arranged above the upper die 6; a second inlet pipe 701 and a second outlet pipe 702 for the heat supply medium to enter and exit are arranged at the bottom of the lower die 7; inside the walls of the upper and lower dies 6, 7, a thermal medium channel is provided. Compare in the outside heating equipment such as heating jacket that sets up, directly set up the hot medium passageway on the lateral wall of last mould 6 and bed die 7, when heating the vulcanization to the natural rubber skin, more energy saving, heat transfer effect is good.

The height of the column 501 is equal to the height of the preform 10. When the mold is filled, the pattern column 5 is firstly filled into the inner ring of the prefabricated body 10, and the pattern column and the inner ring are aligned up and down, and then the pattern column is put into the upper mold 6 and the lower mold 7, so that the mold filling is convenient, and the up-and-down position of the prefabricated body 10 between the upper mold 6 and the lower mold 7 is controlled.

The upper die 6 and the lower die 7 are tightly connected through a bolt 8 and a nut 9.

The poured liquid rubber flows into a cavity formed between the outer wall of the pattern column 5 and the inner walls of the upper die 6 and the lower die 7, liquid rubber is not basically generated at the contact part of the outer wall of the pattern block 502 and the inner annular wall of the prefabricated body 10, liquid rubber is generated at the outer sides of the other fiber framework layers 2 and the polyurethane inner layer 1 between the pattern groove 503 and the inner annular wall of the prefabricated body 10, the pouring amount of the liquid rubber is reasonably controlled, and uniform and compact natural rubber outer layers can be formed at the outer sides of the fiber framework layers 2 and the polyurethane inner layer 1.

According to the invention, the structure of the solid tire is changed, and the fiber framework layer 2 is additionally arranged on the outer side of the polyurethane inner layer 1, so that the deformation of the polyurethane inner layer 1 can be effectively prevented, and the overall strength of the solid tire can be improved; the solid tire is prepared by adopting a secondary pouring method, so that the integral uniformity of the solid tire is improved; when the liquid rubber is vulcanized, the polyurethane inner layer 1 and the fiber framework layer 2 are heated simultaneously, so that the bonding force between the polyurethane inner layer 1 and the fiber framework layer 2, between the polyurethane inner layer 1 and the natural rubber outer layer, and between the fiber framework layer 2 and the natural rubber outer layer can be enhanced.

Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.