阅读说明：本技术 一种双材料双密度实心轮胎及其制作方法 (Double-material double-density solid tire and manufacturing method thereof ) 是由 计文华 于 2019-09-03 设计创作，主要内容包括：本发明涉及一种双材料双密度实心轮胎及其制作方法,包括：一体结构成型的实心胎胚层和中空外胎层,其中,所述实心胎胚层设置于所述中空外胎层的内腔中,且所述实心胎胚层为低密度PU层,用于减轻轮胎整体重量和增加弹性,相应的,所述中空外胎层为高密度橡胶层,且所述中空外胎层设有至少一对注射孔和排气孔,所述注射孔用于注入PU液体形成所述低密度PU层,所述排气孔用于排气泄压,避免实心轮胎产生缺陷。本发明实心轮胎具备外侧的橡胶胎体,保证其强度和耐磨性,并且轮胎的内部实心层为PU液体,保证了其整体的弹性,提高了舒适度,降低了维修成本和安全事故的发生。(The invention relates to a dual-material dual-density solid tire and a manufacturing method thereof, wherein the dual-material dual-density solid tire comprises the following steps: integrated into one piece's solid fetal germ layer and hollow extraterrestrial layer, wherein, solid fetal germ layer set up in the inner chamber of cavity extraterrestrial layer, just solid fetal germ layer is low density PU layer for alleviate the whole weight of tire and increase elasticity, it is corresponding, the cavity extraterrestrial layer is high density rubber layer, just the cavity extraterrestrial layer is equipped with at least a pair of injection hole and exhaust hole, the injection hole is used for injecting into PU liquid and forms the low density PU layer, the exhaust hole is used for the exhaust pressure release, avoids solid tire to produce the defect. The solid tire provided by the invention has the rubber tire body on the outer side, so that the strength and the wear resistance of the solid tire are ensured, and the solid layer in the tire is PU liquid, so that the integral elasticity of the solid tire is ensured, the comfort level is improved, and the maintenance cost and the safety accident are reduced.)

1. A bi-material dual density solid tire, comprising: integrated into one piece's solid fetal germ layer and hollow extraterrestrial layer, wherein, solid fetal germ layer set up in the inner chamber of cavity extraterrestrial layer, just solid fetal germ layer is low density PU layer for alleviate the whole weight of tire and increase elasticity, it is corresponding, the cavity extraterrestrial layer is high density rubber layer, just the cavity extraterrestrial layer is equipped with at least a pair of injection hole and exhaust hole, the injection hole is used for injecting into PU liquid and forms the low density PU layer, the exhaust hole is used for the exhaust pressure release, avoids solid tire to produce the defect.

2. The dual material dual density solid tire of claim 1, wherein the solid tread layer is formed by foaming the PU liquid and has a density of 0.3-0.5g/cm as thin as the thin film, and correspondingly, the high density rubber layer has a density of greater than 0.5g/cm as thin as the thin film.

3. The dual material dual density solid tire of claim 2, wherein it is formed by injecting the PU liquid foam into the hollow outer tire layer that has been vulcanization molded.

4. The dual material dual density solid tire of claim 1, wherein the injection hole and the exhaust hole are symmetrically disposed on the carcass of the hollow carcass layer.

5. A method for manufacturing the dual material dual density solid tire according to claim 3, comprising the steps of:

step one, preparing a hollow outer tire layer: preparing the vulcanized and molded high-density rubber layer, namely the hollow outer tire layer, through a mold;

step two: moving the mold: opening the mold, taking out the hollow outer tire layer and moving the hollow outer tire layer into another mold cavity at normal temperature;

step three: injecting and foaming: injecting PU liquid into the hollow outer tire layer through the injection holes for foaming to generate the low-density PU layer;

step four: pressure relief: exhausting and decompressing through the exhaust hole;

step five: opening the mold: and opening the mold and taking out the prepared dual-material dual-density solid tire.

6. The method of claim 5, wherein the temperature of the hollow carcass layer is maintained at 80-100 ℃ during the transfer.

7. The method of claim 5, wherein the foaming temperature is 40-80 ℃ and the foaming time is 10-20 min.

Technical Field

The invention belongs to the technical field of tires, and particularly relates to a dual-material dual-density solid tire and a manufacturing method thereof.

Background

In the performance indexes of the tire, the strength and the wear resistance of the tire are required to be ensured, and the elasticity and the comfort degree of the tire are also required to be ensured, the traditional tire is generally a hollow tire and a solid tire, wherein the hollow tire needs to be inflated inwards, is easy to explode and is not wear-resistant, the maintenance cost is increased, and safety accidents are easy to happen; the whole solid tyre is a density material, is mostly a rubber material, leads to whole overweight, and elasticity is not good, and the comfort level is low.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the dual-material dual-density solid tire and the manufacturing method thereof.

In order to solve at least one of the above technical problems, the technical solution adopted by the present invention is:

a bi-material dual density solid tire comprising: integrated into one piece's solid fetal germ layer and hollow extraterrestrial layer, wherein, solid fetal germ layer set up in the inner chamber of cavity extraterrestrial layer, just solid fetal germ layer is low density PU layer for alleviate the whole weight of tire and increase elasticity, it is corresponding, the cavity extraterrestrial layer is high density rubber layer, just the cavity extraterrestrial layer is equipped with at least a pair of injection hole and exhaust hole, the injection hole is used for injecting into PU liquid and forms the low density PU layer, the exhaust hole is used for the exhaust pressure release, avoids solid tire to produce the defect.

Further, the solid tread layer is formed by foaming the PU liquid, the density of the solid tread layer is 0.3-0.5g/cm, and correspondingly, the density of the high-density rubber layer is higher than 0.5g/cm in thin film and thin film.

Further, the PU rubber tire is formed by injecting the PU liquid into the hollow outer tire layer which is vulcanized and molded and foaming.

Furthermore, the injection hole and the exhaust hole are symmetrically arranged on the carcass of the hollow outer tyre layer.

In another aspect of the present invention, a method for manufacturing a dual material dual density solid tire according to the present invention is provided, comprising the steps of:

step one, preparing a hollow outer tire layer: preparing the vulcanized and molded high-density rubber layer, namely the hollow outer tire layer, through a mold;

step two: moving the mold: opening the mold, taking out the hollow outer tire layer and moving the hollow outer tire layer into another mold cavity at normal temperature;

step three: injecting and foaming: injecting PU liquid into the hollow outer tire layer through the injection holes for foaming to generate the low-density PU layer;

step four: pressure relief: exhausting and decompressing through the exhaust hole;

step five: opening the mold: and opening the mold and taking out the prepared dual-material dual-density solid tire.

Further, the temperature of the hollow carcass layer is maintained at 80-100 ℃ during the transfer.

Furthermore, the foaming temperature is 40-80 ℃, and the foaming time is 10-20 min.

The beneficial effects of the invention at least comprise:

(1) according to the dual-material dual-density solid tire and the manufacturing method thereof, the PU liquid material can be directly injected into the vulcanized and molded rubber hollow outer tire layer (namely, the hollow tire) or the existing rubber hollow tire, so that the process of processing the hollow tire is saved, the existing waste rubber hollow tire is utilized, the resource is recycled, the manufacturing cost is saved, and the dual-material dual-density solid tire is economic and environment-friendly;

(2) the solid tire prepared by the invention has the rubber tire body on the outer side, so that the strength and the wear resistance of the solid tire are ensured, and the solid layer in the tire is made of the PU liquid material, so that the integral elasticity of the solid tire is ensured, the comfort level is improved, and the maintenance cost and the safety accidents are reduced.

Drawings

FIG. 1 is a schematic structural view of a solid tire according to the present invention.

FIG. 2 is a schematic view of the structure of the hollow outer tube layer of the present invention.

Wherein, PU solid tire germ layer 1, rubber hollow outer tire layer 2, injection hole 3 and exhaust hole 4.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.