阅读说明：本技术 可射铸单色双密度橡胶轮胎及其成型工艺 (Single-color double-density rubber tire capable of being injection-cast and forming process thereof ) 是由 汤泰山 赵正 于 2019-11-21 设计创作，主要内容包括：本发明涉及橡胶轮胎领域,具体涉及可射铸单色双密度橡胶轮胎及其成型工艺,包括如下步骤,步骤一：合模,双密度射铸；步骤二：开模,自动抽掉模芯；步骤三：二次合模；步骤四：放入预成型好的轻质高弹的橡胶发泡轮胎,合模使之具备硫化条件；步骤五：硫化；步骤六：二次开模,打开模腔,取出单色双密度一次成型橡胶轮胎。本发明采用一次性射铸成型工艺,生产流程简单、生产效率高、能耗低、生产成本低,且生产出的轮胎舒适性好、减震和防打滑效果好。(The invention relates to the field of rubber tires, in particular to a single-color double-density rubber tire capable of being subjected to injection molding and a molding process thereof, wherein the molding process comprises the following steps: die assembly and double-density injection casting; step two: opening the mold, and automatically removing the mold core; step three: secondary die assembly; step four: placing the preformed light high-elastic rubber foaming tire, and closing the mold to enable the tire to have a vulcanization condition; step five: vulcanizing; step six: opening the mold for the second time, opening the mold cavity, and taking out the single-color double-density once-formed rubber tire. The invention adopts a one-time injection molding process, has simple production flow, high production efficiency, low energy consumption and low production cost, and the produced tire has good comfort and good shock absorption and anti-slip effects.)

1. The injection-castable single-color double-density rubber tire molding process is characterized by comprising the following steps of: comprises the following steps of (a) carrying out,

the method comprises the following steps: closing the dies, namely folding the upper half die and the lower half die to form a die cavity, arranging the die core in the die cavity, dividing the die cavity into an upper die cavity and a lower die cavity by taking the die core as a boundary, and taking the sizing material for double-density injection casting;

step two: opening the mold, opening the mold cavity, separating an upper half mold and a lower half mold which respectively contain a half rubber tire, and automatically drawing off the mold core;

step three: secondarily closing the dies, namely secondarily folding the upper half die and the lower half die which respectively contain half rubber tires, wherein the rubber tires are hollow after the mold cores are removed;

step four: placing the preformed light high-elastic rubber foaming tire, and closing the mold to enable the tire to have a vulcanization condition;

step five: vulcanizing, namely vulcanizing the rubber tire in the mold cavity, and maintaining the temperature of the upper half mold and the lower half mold to be constant during vulcanization according to the material characteristics;

step six: opening the mold for the second time, opening the mold cavity, and taking out the single-color double-density once-formed rubber tire.

2. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, heaters are arranged on the outer walls of the upper half die and the lower half die to heat, so that the die cavity is heated to 130-180 ℃ during die assembly.

3. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, after die assembly, before injection casting, vacuum pumping is carried out, so that the cavity of the die is in a negative pressure state.

4. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, during double-density injection casting, the material temperature is 60-80 ℃, the injection time is 5-40 s, and the injection is followed by standing for 5-50 s.

5. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: and step two, automatically drawing out the mold core and then carrying out water cooling to control the temperature of the mold core to be 60-80 ℃.

6. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the fifth step, the vulcanization time is 100-1000 s.

7. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, the upper half die, the lower half die and the die core are matched with the shape of the rubber tire to be formed.

8. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, the die cavity is a fixed machine position.

9. The process for molding a single-color dual-density rubber tire as claimed in claim 1, wherein: in the first step, the injected rubber material is the combination of cross-linkable rubber and waste rubber.

10. But the monochrome dual density rubber tire of injection molding, its characterized in that: the molding process of any one of claims 1 to 9.

Technical Field

The invention relates to the field of rubber tires, in particular to a single-color double-density rubber tire capable of being subjected to injection molding and a molding process thereof.

Background

The tire is one of important components of the automobile, and mainly has the functions of supporting the mass of the automobile, bearing the load of the automobile, transmitting traction and braking torque and ensuring the adhesion between wheels and a road surface; the vibration and impact force of the automobile during running are reduced and absorbed, the automobile parts are prevented from being subjected to severe vibration and early damage, the high-speed performance of the automobile is adapted, the noise during running is reduced, and the running safety, the operation stability, the comfort and the energy-saving economy of the automobile are ensured.

Tires are classified into solid tires and pneumatic tires. The solid tire is a tire corresponding to a pneumatic tire (hollow tire), and the carcass thereof is solid, does not use a cord as a framework, does not need to be inflated, and thus does not need an inner tube or an inner liner. Solid tires are currently used only for high-load vehicles running at low speed, such as balance cars, scooters, golf carts, mobility carts for the elderly, and the like.

The existing solid tyre generally adopts the procedures of batching, hot-mixing extrusion, molding, vulcanization and the like. The preparation process of the solid tire has the following defects: on one hand, the extrusion process is complex, the production flow is long, the qualification rate is high, the energy consumption is high, the cost is high, and the production process is easy to pollute the environment. In the second aspect, the produced tire has poor comfort, no shock absorption and easy slipping.

The invention provides the single-color double-density one-time injection molding process of the rubber tire to solve the phenomenon, the molding and the vulcanization are completed in the same mold cavity, the cost and the expense of the tire are reduced in the vulcanization process, the molding time is short, the adhesion is not needed, the energy consumption is reduced, the environment is not polluted, and the environment is protected.

Disclosure of Invention

In order to solve the problems, the invention provides the injection-castable single-color double-density rubber tire which adopts a one-time injection-casting molding process, has simple production flow, high production efficiency, low energy consumption and low production cost, and has good comfort, shock absorption and anti-slip effects, and the molding process thereof.

The technical scheme adopted by the invention is as follows: a process for preparing the dual-density single-colour rubber tyre by injection moulding includes such steps as preparing the rubber tyre,

the method comprises the following steps: closing the dies, namely folding the upper half die and the lower half die to form a die cavity, arranging the die core in the die cavity, dividing the die cavity into an upper die cavity and a lower die cavity by taking the die core as a boundary, and taking the sizing material for double-density injection casting;

step two: opening the mold, opening the mold cavity, separating an upper half mold and a lower half mold which respectively contain a half rubber tire, and automatically drawing off the mold core;

step three: secondarily closing the dies, namely secondarily folding the upper half die and the lower half die which respectively contain half rubber tires, wherein the rubber tires are hollow after the mold cores are removed;

step four: placing the preformed light high-elastic rubber foaming tire, and closing the mold to enable the tire to have a vulcanization condition;

step five: vulcanizing, namely vulcanizing the rubber tire in the mold cavity, and maintaining the temperature of the upper half mold and the lower half mold to be constant during vulcanization according to the material characteristics;

step six: opening the mold for the second time, opening the mold cavity, and taking out the single-color double-density once-formed rubber tire.

The technical scheme is further improved in that in the step one, heaters are arranged on the outer walls of the upper half die and the lower half die to heat, so that the die cavity is heated to 130-180 ℃ during die assembly.

The technical scheme is further improved in that in the step one, after die assembly, before injection casting, vacuumizing is performed, so that the cavity of the die is in a negative pressure state.

The technical scheme is further improved in the step one, during double-density injection casting, the material temperature is 60-80 ℃, the injection time is 5-40 s, and the injection is performed and then the injection is performed for 5-50 s.

The technical scheme is further improved in that in the step two, the mold core is automatically drawn out and then water cooling is carried out, so that the temperature of the mold core is controlled to be 60-80 ℃.

The technical scheme is further improved in that in the fifth step, the vulcanization time is 100-1000 s.

The technical scheme is further improved in that in the step one, the upper half die, the lower half die and the die core are matched with the shape of the rubber tire to be formed.

The technical scheme is further improved in that in the step one, the die cavity is a fixed machine position.

The technical scheme is further improved in that in the step one, the rubber material for injection casting is a combination of crosslinkable rubber and waste rubber.

A single color dual density rubber tire, produced by the molding process of any one of claims 1 to 9.

The invention has the beneficial effects that:

1. on one hand, the rubber tire molding process can complete single-color double-density injection casting, hollowing, foaming and vulcanizing processes in a single system, can effectively solve the problems of energy consumption, time consumption, high cost and the like caused by secondary re-pressurization, heating and the like in the rubber tire production process, also avoids circulation of tires in each process, reduces cost and molding time, reduces energy consumption, reduces harmful gas emission caused by secondary heating, reduces energy consumption caused by secondary heating, and achieves the effects of environmental protection and energy conservation. In the second aspect, the single-color double-density one-shot injection molding process for the rubber tire can adjust the required process parameters, the injection casting pressure, the injection temperature, the air pressure temperature vulcanization time and the like according to different process requirements of the rubber tire, thereby achieving the best effect of the tire. In the third aspect, the single-color double-density one-step injection molding process for the rubber tire has the advantages that the manufactured tire is heat-resistant, wear-resistant and weather-resistant, the production quality of the same mold cavity is stable, and the dynamic balance is uniform and good. In the fourth aspect, the production process can realize continuous uninterrupted production, and has high production efficiency and high automation degree. In the fifth aspect, the same mold cavity comprises an upper mold half, a lower mold half, a mold core and a cavity formed by the upper mold half, the lower mold half, the mold core and the mold core, the mold core lays a foundation for the hollow of the mold cavity, and further injection molding, a hollow and vulcanizing device is integrated, a liner required for filling and vulcanizing is arranged after the hollow mold, and the tire with a light high-elastic foaming structure enters mold closing and vulcanizing, so that heat loss and process flow cost caused by process flow in the prior art are avoided, and the defects of multiple pressurization, heating and secondary glue pasting of the traditional rubber tire process, energy consumption and high time consumption and cost are overcome. And in the sixth aspect, the rubber tire produced by adopting the molding process adopts a solid and double-density structure, so that the comfort is good, and the shock absorption and anti-slip effects are good. In the seventh aspect, the process of the invention also reduces the emission of harmful gases caused by secondary heating, reduces the rejection rate of the dual-density rubber tire caused by secondary heating, reduces the energy consumption caused by secondary heating and pressurization, and achieves the effects of environmental protection and energy saving. In an eighth aspect of the present invention,

2. in the first step, heaters are arranged on the outer walls of the upper half die and the lower half die to heat, so that the die cavity is heated to 130-180 ℃ during die assembly. The outer walls of the upper half die and the lower half die are heated, heat is transferred to the die cavity, and the temperature required during vulcanization is guaranteed, so that vulcanization can be smoothly carried out. Meanwhile, if the temperature in the die cavity is too high and exceeds 180 ℃, the rubber tire can be aged, the service life of the rubber tire is influenced, and if the temperature is lower than 130 ℃, the vulcanization temperature cannot be reached, the vulcanization efficiency can be reduced. The vulcanization temperature is optimal between 130 ℃ and 180 ℃, and the proper temperature can be selected according to the specification and the shape of the rubber tire.

3. In the first step, after die assembly, before injection casting, vacuum pumping is carried out, and residual gas in the die is pumped out, so that the cavity of the die is in a negative pressure state, rubber materials are conveniently injected and cast, and the forming efficiency is improved.

4. In the first step, during double-density injection casting, the material temperature is 60-80 ℃, the injection time is 5-40 s, and the injection is followed by standing for 5-50 s. The intermittent injection casting is adopted, so that the injection casting is uniform and consistent, and the quality of a finished product is good.

5. And step two, automatically drawing out the mold core and then carrying out water cooling to control the temperature of the mold core to be 60-80 ℃. The mold core is uniformly cooled by water cooling, so that the mold core is prevented from being aged due to overhigh temperature.

6. In the fifth step, the vulcanization time is 100-1000 s. And selecting the vulcanization time, wherein the proper vulcanization time can be selected according to the specification and the shape of the rubber tire so as to ensure the best quality of the tire.

7. In the first step, the upper half die, the lower half die and the die core are matched with the shape of the rubber tire to be formed, and the shape of the die can be adjusted according to the shape of the tire, so that the die can meet the requirement of continuous production.

8. In the first step, the die cavity is a fixed machine position. The injection platform is the fixed position, and the two is fixed relatively for the operation is more stable during the injection, and it is unstable to avoid the motion repeatedly between the position, is favorable to improving shaping efficiency and product quality.

9. In the first step, the injected rubber material is the combination of cross-linkable rubber and waste rubber. By recycling the waste rubber, the resource utilization rate is improved, and the production cost is greatly reduced.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

FIG. 1 shows a process flow diagram of the present invention.