CN110576550A - Double-layer filling tire, preparation method thereof and simulated pneumatic tire with filling tire - Google Patents
Double-layer filling tire, preparation method thereof and simulated pneumatic tire with filling tire Download PDFInfo
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- CN110576550A CN110576550A CN201810591762.1A CN201810591762A CN110576550A CN 110576550 A CN110576550 A CN 110576550A CN 201810591762 A CN201810591762 A CN 201810591762A CN 110576550 A CN110576550 A CN 110576550A
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- tire
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- double
- core layer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/02—Solid tyres ; Moulds therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/002—Inflatable pneumatic tyres or inner tubes filled at least partially with foam material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
The invention provides a preparation method of a double-layer filling tire, which comprises the following steps of 1) providing a first mold, pouring a first foaming material, and foaming to prepare a spare tire core layer; 2) and providing a second mold, placing the tire core layer into the second mold, pouring a second foaming material, foaming the outer surface of the tire core layer to prepare the tire core outer layer, so that the tire core outer layer covers the tire core layer, and thus obtaining the double-layer filled tire, wherein the elasticity of the first foaming material is lower than that of the second foaming material, and the density of the first foaming material is lower than that of the second foaming material. The preparation method is simple, the tire core layer and the tire core outer layer are both prepared from different foaming materials, so that various performances of the double-layer filling tire are not influenced by a single foaming material, and the obtained double-layer filling tire has the advantages of low weight, high elasticity and high strength. The invention also provides the double-layer filling tire prepared by the preparation method and the simulated pneumatic tire containing the double-layer filling tire.
Description
Technical Field
The invention relates to the field of tires, in particular to a double-layer filling tire, a preparation method thereof and a simulated pneumatic tire with the filling tire.
background
With the advancement of the times and the improvement of the quality of life, there are many different designs of wheels for baby carriages or children's toys. The traditional pneumatic tire is provided with an outer tire and an inner tire, wherein the outer tire is made of rubber materials, the inner tire is hollow, the inner tire needs to be inflated firstly when the pneumatic tire is used, the pneumatic tire has the defect of easy tire burst, and even if the tire burst is avoided, the trouble of frequent inflation is also caused.
In view of the disadvantages of pneumatic tires, simulated pneumatic tires have been produced and developed well. The imitation inflatable tire mainly comprises an outer tire, a filling tire and a hub, wherein the filling tire is prepared from a foaming material, and is sleeved in the outer tire and mounted on the hub together without being inflated. However, the existing filling tire is usually prepared by using EVA foaming material, the filling tire with only one foaming layer is prepared, and the density of the filling tire prepared by EVA foaming is 0.15g/cm3So that the filled tire has large weight, low elasticity and low strength.
Therefore, it is desired to develop a low-weight, highly elastic and high-strength tire to solve the above problems.
Disclosure of Invention
an object of the present invention is to provide a method for manufacturing a double-layered tire, which can manufacture a double-layered tire having a low weight, high elasticity and high strength.
The invention also aims to provide a double-layer filling tire prepared by the preparation method.
It is still another object of the present invention to provide a simulated pneumatic tire comprising the above-described two-ply pneumatic tire.
In order to achieve the above object, the present invention provides a method for preparing a double-layer filled tire, comprising:
1) Providing a first mould, pouring a first foaming material, and foaming to prepare a spare tire core layer;
2) And providing a second mold, placing the tire core layer into the second mold, pouring a second foaming material, foaming the outer surface of the tire core layer to prepare the tire core outer layer, so that the tire core outer layer covers the tire core layer, and thus obtaining the double-layer filled tire, wherein the elasticity of the first foaming material is lower than that of the second foaming material, and the density of the first foaming material is lower than that of the second foaming material.
Preferably, the first foam material of the present invention is EPP.
Preferably, the second foaming material of the present invention is one or both of ETPO and ETPU.
Preferably, the first foam material of the present invention is foamed to a foaming ratio of the core layer of 40 times.
Preferably, the second foaming material of the present invention is foamed with a foaming ratio of the outer layer of the core being 10 times.
Preferably, in step 2), before the step of placing the core layer in the second mold, a positioning hole is formed in the core layer, and the core layer is aligned with the second mold through the positioning hole.
the invention also provides a double-layer filling tire prepared by the preparation method.
Preferably, the outer layer of the core of the present invention has a density more than six times that of the core layer.
Preferably, the volume of the core layer and the core outer layer of the present invention satisfies the following formula:
(D1×V1+D2×V2)＜D×V；V1+V2＝V，
Wherein D1 is the density of the core layer, V1 is the volume of the core layer, D2 is the density of the core-outer layer, V2 is the volume of the core-outer layer, D is the density of the EVA foam monolayer-filled tire and D is 0.15g/cm3And V is the volume of the single-ply filled tire and is equal to the total volume of the double-ply filled tire.
preferably, D1 is less than D, and D is less than or equal to D2.
The invention also provides a simulated pneumatic tire which comprises an outer tire, wherein the inner part of the outer tire is only provided with the double-layer filling tire, and the simulated pneumatic tire also comprises a hub for supporting the double-layer filling tire.
Compared with the prior art, the invention adopts the first foaming material to foam the spare tire core layer, and adopts the second foaming material to foam the outer surface of the tire core layer to prepare the outer tire core layer, so as to form the double-layer filling tire with the two parts of the tire core layer and the outer tire core layer. The preparation method is simple, and the tire core layer and the tire core outer layer are both prepared from different foaming materials, so that various performances of the double-layer filling tire are not influenced by a single foaming material. Meanwhile, the density of the first foaming material is lower than that of the second foaming material, so that the prepared tire core layer has the advantage of light weight, the elasticity of the first foaming material is lower than that of the second foaming material, the outer layer of the tire core has good elasticity, and the double-layer filling tire has the advantages of low weight and high elasticity by utilizing the complementation of the performances of the tire core layer and the outer layer of the tire core.
Drawings
FIG. 1 is a schematic perspective view of a double-ply infilled tire according to the invention.
Fig. 2 is a cross-sectional view of the two-ply infilled tire shown in fig. 1.
Description of the element reference numerals
100 double-layer filling tire, 10 tire core layers, 20 tire core outer layers and 30 positioning holes.
Detailed Description
embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements.
Referring to fig. 1-2, the dual-layer tire 100 of the present invention includes a core layer 10 and a core outer layer 20 covering the core layer 10, wherein the core layer 10 is made of a first foam material, the core outer layer 20 is made of a second foam material, the first foam material has a lower elasticity than the second foam material, and the first foam material has a lower density than the second foam material. The double-layer filling tire 100 is designed by the two parts of the tire core layer 10 and the tire core outer layer 20, and the tire core layer 10 and the tire core outer layer 20 are prepared by different foaming materials, so that the performance limitation caused by the fact that the double-layer filling tire 100 is prepared by the same material is avoided. The tire core layer 10 and the tire core outer layer 20 are formed by foaming materials, inflation is not needed, and tire burst is reduced. Furthermore, the density of the first foaming material is lower than that of the second foaming material, so that the prepared tire core layer 10 has the advantage of light weight, and meanwhile, the elasticity of the second foaming material is higher than that of the first foaming material, so that the tire core outer layer 20 has good elasticity and compressive strength, and is coated on the tire core layer 10 to protect the tire core layer. The double-layered tire 100 has advantages of low weight, high elasticity and high compressive strength of the entire tire 100 by utilizing the complementation of the properties of the core layer 10 and the core outer layer 20.
Specifically, the first foam material may be EPP, and the core layer 10 is prepared by EPP foaming, and the density of the core layer 10 is about 0.0225g/cm3So that the prepared tire core layer 10 has light weight, and the EPP also belongs to an environment-friendly material and meets the requirement of environmental protection. The second foaming material is one or two of ETPO or ETPU. In this example, the core outer layer 20 is prepared by ETPO foaming, and the density of the core outer layer 20 is about 0.25g/cm3The ETPO adopted is thermoplastic polyolefin foam material, has high elasticity and stronger compressive strength, and the prepared tire core outer layer 20 has the advantages of high elasticity and high compressive strength. Of course, ETPU foaming can also be used to prepare the core outer layer 20, and the density of the core outer layer 20 is about 0.15g/cm3Wherein, the ETPU material is foaming thermoplastic polyurethane, which belongs to nontoxic, tasteless and degradable material, thereby the double-layer filling tire 100 is more environment-friendly. Meanwhile, the ETPU material has the advantages of higher compressive strength and high elasticity, can prolong the service life of the double-layer filling tire 100 and has a damping effect. The outer layer 20 of the core may also be prepared by co-foaming ETPO and ETPU according to actual needs, which is not limited herein. In this embodiment, because the core layer 10 is made of EPP material, the core layer 10 has a very small density compared to the core outer layer 20, specifically, the density of the core outer layer 20 is more than six times of the density of the core layer 10, and in the embodiment using ETPO as the core outer layer 20, the density of the core outer layer 20 is more than ten times of the density of the core layer 10, the core layer 10 can have a lighter weight compared to the core outer layer 20, which is beneficial to reducing the weight of the double-layer filled tire 100. Meanwhile, the outer tire core layer 20 is prepared by ETPO foaming, so that the outer tire core layer 20 covers the tire core layer 10, and the tire core layer is protected and provides better elasticity and compressive strength to the outside. In one embodiment, the expansion ratio of the core layer 10 using EPP may be 40 times, and the expansion ratio of the core outer layer 20 using ETPO may be 10 times.
In order to more conveniently adjust the volume ratio of the core layer 10 to the core outer layer 20 so as to achieve lighter weight compared with a filled tire prepared by traditional EVA foaming, the volumes of the core layer 10 and the core outer layer 20 of the invention satisfy the following formula:
(D1×V1+D2×V2)＜D×V；V1+V2＝V，
Wherein D1 is the density of the core layer 10, V1 is the volume of the core layer 10, D2 is the density of the core outer layer 20, V2 is the volume of the core outer layer 20, D is the density of a conventional EVA foam prepared single ply filled tire and D is about 0.15g/cm3and V is the volume of the single-layer filled tire prepared by conventional EVA foaming and is equal to the total volume of the double-layer filled tire 100. In the embodiment where the core layer 10 is made of EPP material and the core outer layer 20 is made of ETPO foam, the core layer 10 has a density D1 of 0.0225g/cm3The volume V1 of the core layer 10 is 731cm3(ii) a The fetal heart outer layer 20 has a density D2 of 0.15g/cm3The volume V2 of the fetal heart outer layer 20 is 558cm3The total volume V of the double-layer filling tire 100 is 1289cm3. Further, according to the above formula, it can be calculated that the weight of the conventional EVA foamed single-layer tire is about 193.35g, while the weight of the present invention double-layer tire 100 is about 155.9g, so that the tire has a significantly lower mass than the conventional dry EVA foamed single-layer tire.
With continued reference to fig. 1, in order to ensure the fixation of the core layer 10 on the mold, the core layer 10 is provided with positioning holes 30, specifically, the positioning holes 30 are uniformly arranged on both sides of the core layer 10 to make the fixation stable, and the core outer layer 20 is also provided with the positioning holes 30 in a better way, which is beneficial for the preparation process.
The method for producing the double-layer infilled tire 100 of the present invention includes:
Providing a first mould, pouring a first foaming material, and foaming to prepare a tire core layer 10;
Providing a second mold, aligning the core layer 10 with the positioning holes and placing the core layer in the second mold, injecting a second foaming material, foaming the outer surface of the core layer 10 to prepare the core outer layer 20, so that the core outer layer 20 covers the core layer 10, and obtaining the double-layer filled tire 100, wherein the elasticity of the first foaming material is lower than that of the second foaming material, and the density of the first foaming material is lower than that of the second foaming material.
In this embodiment, EPP material is injected into the first mold through the injection hole of the first mold to foam the spare tire core layer 10, and then the tire core layer 10 is placed in the second mold, and ETPO material is injected into the second mold through the injection hole to foam the outer surface of the tire core layer 10 to prepare the tire core outer layer 20, so that the tire core outer layer 20 covers the tire core layer 10.
The invention also provides a simulated pneumatic tire, which comprises an outer tire, a hub and the double-layer filling tire 100, wherein the double-layer filling tire 100 is only arranged in the outer tire and supported by the hub, and the simulated pneumatic tire has the advantages of low weight, high elasticity and high strength due to the advantages of the double-layer filling tire 100.
Comparative example 1
The preparation method is the same as above, the double-layer filling tire is prepared only by adopting ETPO, namely the tire core layer and the tire core outer layer are foamed by adopting ETPO materials, although the ETPO materials have the characteristic of high elasticity, the tire core layer prepared by adopting the ETPO materials can cause the weight of the tire core layer to be larger, the weight of the whole double-layer filling tire is large, and meanwhile, the cost of the ETPO materials is higher.
Comparative example 2
The preparation method is the same as the above, the EPP foaming is only adopted to prepare the double-layer filled tire, namely, the tire core layer and the tire core outer layer are both foamed by adopting the EPP material, although the double-layer filled tire with lighter weight can be obtained, the elastic strength of the tire core outer layer is lower, the compressive strength is not strong, and the use requirement of the simulated pneumatic tire is difficult to achieve.
Compared with the prior art, the invention adopts the first foaming material to foam the spare tire core layer 10 and adopts the second foaming material to foam the outer surface of the tire core layer 10 to prepare the tire core outer layer 20 so as to form the double-layer filling tire 100 with two parts of the tire core layer 10 and the tire core outer layer 20. The preparation method is simple, and the core layer 10 and the core outer layer 20 are both prepared by adopting different foaming materials, so that various performances of the double-layer filling tire 100 are not influenced by a single foaming material. Meanwhile, the density of the first foaming material is lower than that of the second foaming material, so that the prepared tire core layer 10 has the advantage of light weight, the elasticity of the first foaming material is lower than that of the second foaming material, the tire core outer layer 20 has good elasticity, and the double-layer filling tire 100 has the advantages of low weight and high elasticity by utilizing the complementation of the performances of the tire core layer 10 and the tire core outer layer 20.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (11)
1. A method for preparing a double-layer filling tire is characterized by comprising the following steps:
1) Providing a first mould, pouring a first foaming material, and foaming to prepare a spare tire core layer;
2) Providing a second mould, placing the tire core layer in the second mould, pouring a second foaming material, foaming the outer surface of the tire core layer to prepare a tire core outer layer, so that the tire core outer layer covers the tire core layer, and obtaining the double-layer filling tire, wherein the elasticity of the first foaming material is lower than that of the second foaming material, and the density of the first foaming material is lower than that of the second foaming material.
2. The method of producing a two-layer pneumatic tire as claimed in claim 1, wherein the first foam material is EPP.
3. The method of producing a two-layer filled tire according to claim 1, wherein the second foam material is one or both of ETPO and ETPU.
4. The method of producing a two-layer pneumatic tire as claimed in claim 1, wherein the first foam material is foamed at a foaming ratio of 40 times to the core layer.
5. The method of producing a two-layer pneumatic tire as claimed in claim 1, wherein said second foam material is foamed at a foaming ratio of 10 times in said core outer layer.
6. The method of manufacturing a two-layer pneumatic tire as claimed in claim 1, wherein the step 2) of placing the core layer in front of the second mold further comprises forming a positioning hole in the core layer, the core layer being aligned with the second mold by means of the positioning hole.
7. A double-layered infilled tyre, characterized in that it is obtained by the process for the preparation of a double-layered infilled tyre according to any one of claims 1 to 6.
8. The dual-filled tire of claim 7, wherein the density of the outer core layer is more than six times the density of the core layer.
9. The dual-filled tire of claim 7, wherein the volume of the core layer and the core outer layer satisfies the following equation:
(D1×V1+D2×V2)＜D×V；V1+V2＝V，
Wherein D1 is the density of the core layer, V1 is the volume of the core layer, D2 is the density of the outer core layer, V2 is the volume of the outer core layer, D is the density of an EVA foam monolayer-filled tire and D is 0.15g/cm3And V is the volume of the single-ply filled tyre and is equal to the total volume of the double-ply filled tyre.
10. the double-ply infilled tire of claim 9, wherein said D1 is less than said D, and said D is less than or equal to said D2.
11. A simulated pneumatic tire comprising an outer tire having disposed therein only a double-ply infill as claimed in any one of claims 7 to 10, the simulated pneumatic tire further comprising a hub for supporting the double-ply infill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810591762.1A CN110576550A (en) | 2018-06-08 | 2018-06-08 | Double-layer filling tire, preparation method thereof and simulated pneumatic tire with filling tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810591762.1A CN110576550A (en) | 2018-06-08 | 2018-06-08 | Double-layer filling tire, preparation method thereof and simulated pneumatic tire with filling tire |
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| CN110576550A true CN110576550A (en) | 2019-12-17 |
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| CN201810591762.1A Pending CN110576550A (en) | 2018-06-08 | 2018-06-08 | Double-layer filling tire, preparation method thereof and simulated pneumatic tire with filling tire |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0257865A2 (en) * | 1986-08-19 | 1988-03-02 | Watts Industrial Tyres Limited | Tyre construction method |
| US20100212797A1 (en) * | 2009-02-24 | 2010-08-26 | Vanquish Products Llc | Adjustable Foam Inserts for Vehicle Tires |
| JP2013184615A (en) * | 2012-03-08 | 2013-09-19 | Yokohama Rubber Co Ltd:The | Non-pneumatic tire and method of manufacturing the same |
| CN105034697A (en) * | 2015-08-11 | 2015-11-11 | 大连华工创新科技股份有限公司 | E-TPU (expanded thermoplastic polyurethane) tire and manufacturing method thereof |
| CN106114065A (en) * | 2016-08-04 | 2016-11-16 | 东莞杰美塑胶五金有限公司 | A kind of mixed foaming body tire and production mould, production method |
| CN106891470A (en) * | 2017-04-12 | 2017-06-27 | 张海亭 | A kind of E TPU foaming tires manufacture method and wheel |
| CN107443644A (en) * | 2017-09-20 | 2017-12-08 | 上海威纳工程技术有限公司 | The solid bicycle tires of PU and its manufacture method of a kind of expanded beads containing ETPU |
| CN207015082U (en) * | 2017-07-03 | 2018-02-16 | 叶凯旋 | A kind of hollow non-inflatable tyre of composite high-molecular material |
-
2018
- 2018-06-08 CN CN201810591762.1A patent/CN110576550A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0257865A2 (en) * | 1986-08-19 | 1988-03-02 | Watts Industrial Tyres Limited | Tyre construction method |
| US20100212797A1 (en) * | 2009-02-24 | 2010-08-26 | Vanquish Products Llc | Adjustable Foam Inserts for Vehicle Tires |
| JP2013184615A (en) * | 2012-03-08 | 2013-09-19 | Yokohama Rubber Co Ltd:The | Non-pneumatic tire and method of manufacturing the same |
| CN105034697A (en) * | 2015-08-11 | 2015-11-11 | 大连华工创新科技股份有限公司 | E-TPU (expanded thermoplastic polyurethane) tire and manufacturing method thereof |
| CN106114065A (en) * | 2016-08-04 | 2016-11-16 | 东莞杰美塑胶五金有限公司 | A kind of mixed foaming body tire and production mould, production method |
| CN106891470A (en) * | 2017-04-12 | 2017-06-27 | 张海亭 | A kind of E TPU foaming tires manufacture method and wheel |
| CN207015082U (en) * | 2017-07-03 | 2018-02-16 | 叶凯旋 | A kind of hollow non-inflatable tyre of composite high-molecular material |
| CN107443644A (en) * | 2017-09-20 | 2017-12-08 | 上海威纳工程技术有限公司 | The solid bicycle tires of PU and its manufacture method of a kind of expanded beads containing ETPU |
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