CN114311780A - Preparation method of TPU (thermoplastic polyurethane) ultra-light bicycle inner tube - Google Patents
Preparation method of TPU (thermoplastic polyurethane) ultra-light bicycle inner tube Download PDFInfo
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Abstract
The invention provides a preparation method of a TPU (thermoplastic polyurethane) ultra-light bicycle inner tube, which comprises the following steps: s1, putting the tire tube rubber into a dryer; s2, putting the dried tire tube rubber material into a tire tube extruder to obtain a TPU tire tube; s3, spraying codes on the TPU tire tube; s4, cutting the TPU tire tube to obtain the TPU inner tube; s5, putting the air tap rubber into a dryer; s6, putting the dried air faucet glue into an air faucet injection molding machine to obtain a TPU air faucet; s7, putting the air tap adapter sheet rubber material into a dryer; s8, putting the dried air nozzle adapter sheet rubber material into an air nozzle adapter sheet injection molding machine to obtain a TPU air nozzle with an adapter sheet; s9, punching the TPU inner tube, inserting the TPU air nozzle with the adapter sheet into the punched hole and welding; and S10, carrying out closed-loop welding on the TPU inner tube. The preparation method of the TPU ultralight bicycle inner tube has simple steps, and the prepared TPU ultralight bicycle inner tube has light weight, good puncture resistance and small rolling resistance.
Description
Technical Field
The invention relates to a preparation method of a TPU (thermoplastic polyurethane) ultra-light bicycle inner tube.
Background
In recent years, in the middle-high end sports bicycle market, users have strong requirements for weight reduction and performance enhancement of bicycles, and the traditional bicycle inner tube is mostly a butyl inner tube, but the traditional butyl inner tube is heavy, poor in puncture resistance and large in rolling resistance, so that a preparation method of the TPU ultra-light bicycle inner tube is urgently needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a TPU (thermoplastic polyurethane) ultra-light bicycle inner tube.
In order to solve the technical problems, the invention provides a preparation method of a TPU (thermoplastic polyurethane) ultra-light bicycle inner tube, which comprises the following steps:
s1, putting the tube rubber material consisting of TPU, a tapping agent, color master and butadiene rubber into a dryer, drying for 4 hours at 104 ℃ and uniformly stirring;
s2, putting the dried tire tube rubber material into a hopper of a tire tube extruder, obtaining a TPU tire tube through the tire tube extruder, and cooling and shaping the TPU tire tube;
s3, conveying the TPU tire tube into an ink-jet printer to perform ink-jet printing;
s4, conveying the code-sprayed TPU tire tube to a tractor, and cutting the TPU tire tube through the tractor and a cutting machine to obtain a TPU inner tube;
s5, putting the air tap rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s6, putting the dried air faucet glue into a hopper of an air faucet injection molding machine, installing an air faucet mold into the air faucet injection molding machine, and obtaining a TPU air faucet through the air faucet mold;
s7, putting the air tap adapter sheet rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s8, putting the dried air nozzle adapter sheet rubber material into a hopper of an air nozzle adapter sheet injection molding machine, installing an air nozzle adapter sheet mold into the air nozzle adapter sheet injection molding machine, inserting the TPU air nozzle obtained in the step S6 into the air nozzle adapter sheet mold, and obtaining the TPU air nozzle with the adapter sheet through the air nozzle adapter sheet mold;
s9, punching the TPU inner tube obtained in the step S4, inserting the TPU air nozzle with the adapter sheet into the TPU inner tube from the hole of the punched hole, and welding the TPU inner tube through a high-frequency welding machine;
and S10, performing closed-loop welding on the TPU inner tube processed in the step S9 through a high-frequency welding machine to obtain the TPU ultra-light bicycle inner tube.
In the step S1, the tube rubber comprises the following raw materials by weight: TPU85, opening agent 8, color master batch 4 and butadiene rubber 3.
In the step S2, the rubber material of the tire tube is kept at 80 ℃ in the hopper of the tire tube extruder, so as to avoid secondary moisture of the rubber material.
In the step S4, the length of the TPU inner tube is 202 cm.
In the step S5, the air tap rubber material includes the following raw materials by weight: TPU 96 and color master batch 4.
In the step S6, the air tap sizing material is kept at 65 ℃ in the hopper of the air tap injection molding machine, so that the air tap sizing material is prevented from being secondarily damped.
In the step S7, the air tap adapter piece rubber material includes the following raw materials by weight: TPU 96 and color master batch 4.
In the step S8, the air tap adapter sheet rubber material is kept at 65 ℃ in the hopper of the air tap adapter sheet injection molding machine, so that the air tap rubber material is prevented from being secondarily damped.
The invention achieves the following beneficial effects: the preparation method of the TPU ultralight bicycle inner tube has simple steps, and the prepared TPU ultralight bicycle inner tube has light weight, good puncture resistance and small rolling resistance, can meet the requirements of users on the weight reduction and performance enhancement of bicycles, and has wide market prospect.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments.
Example 1
The preparation method of the TPU ultralight bicycle inner tube comprises the following steps:
s1, putting the tube rubber material consisting of TPU, a tapping agent, color master and butadiene rubber into a dryer, drying for 4 hours at 104 ℃ and uniformly stirring;
s2, putting the dried tire tube rubber material into a hopper of a tire tube extruder, obtaining a TPU tire tube through the tire tube extruder, and cooling and shaping the TPU tire tube;
s3, conveying the TPU tire tube into an ink-jet printer to perform ink-jet printing;
s4, conveying the code-sprayed TPU tire tube to a tractor, and cutting the TPU tire tube through the tractor and a cutting machine to obtain a TPU inner tube;
s5, putting the air tap rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s6, putting the dried air faucet glue into a hopper of an air faucet injection molding machine, installing an air faucet mold into the air faucet injection molding machine, and obtaining a TPU air faucet through the air faucet mold;
s7, putting the air tap adapter sheet rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s8, putting the dried air nozzle adapter sheet rubber material into a hopper of an air nozzle adapter sheet injection molding machine, installing an air nozzle adapter sheet mold into the air nozzle adapter sheet injection molding machine, inserting the TPU air nozzle obtained in the step S6 into the air nozzle adapter sheet mold, and obtaining the TPU air nozzle with the adapter sheet through the air nozzle adapter sheet mold;
s9, punching the TPU inner tube obtained in the step S4, inserting the TPU air nozzle with the adapter sheet into the TPU inner tube from the hole of the punched hole and welding and fixing the TPU air nozzle, wherein a high-frequency welding machine is adopted for welding during welding;
and S10, carrying out closed-loop welding on the TPU inner tube processed in the step S9 through a tube, and welding by adopting a high-frequency welding machine during welding to obtain the TPU ultra-light bicycle inner tube.
In the step S1, the tube rubber includes the following raw materials by weight (kg): TPU85, opening agent 8, color master batch 4 and butadiene rubber 3.
In the step S2, the rubber material of the tire tube is kept at 80 ℃ in the hopper of the tire tube extruder, so as to avoid secondary moisture of the rubber material.
In the step S4, the length of the TPU inner tube is 202 cm.
In the step S5, the air tap rubber material includes the following raw materials by weight (kg): TPU 96 and color master batch 4.
In the step S6, the air tap sizing material is kept at 65 ℃ in the hopper of the air tap injection molding machine, so that the air tap sizing material is prevented from being secondarily damped.
In the step S7, the air nozzle adapter piece glue stock includes the following raw materials by weight (kg): TPU 96 and color master batch 4.
In the step S8, the air tap adapter sheet rubber material is kept at 65 ℃ in the hopper of the air tap adapter sheet injection molding machine, so that the air tap rubber material is prevented from being secondarily damped.
Example 2
The preparation method of the TPU ultralight bicycle inner tube of the embodiment is different from that of the embodiment 1 in that: the tire tube rubber material comprises the following raw materials by weight (kilogram): TPU850, an opening agent 80, color master batch 40 and butadiene rubber 30. The air faucet sizing material comprises the following raw materials by weight (kilogram): TPU 960, color masterbatch 40. The air faucet adapter sheet rubber material comprises the following raw materials by weight (kilogram): TPU 960, color masterbatch 40.
Example 3
The preparation method of the TPU ultralight bicycle inner tube of the embodiment is different from that of the embodiment 1 in that: the tire tube rubber material comprises the following raw materials by weight (kilogram): 8.5 parts of TPU, 0.8 part of an opening agent, 0.4 part of color master batch and 0.3 part of butadiene rubber. The air faucet sizing material comprises the following raw materials by weight (kilogram): 9.6 parts of TPU and 0.4 part of color master batch. The air faucet adapter sheet rubber material comprises the following raw materials by weight (kilogram): 9.6 parts of TPU and 0.4 part of color master batch.
The preparation method of the TPU ultralight bicycle inner tube comprises the following steps of:
1. production of a tire tube:
1) mixing a tire tube rubber material according to the proportion of 85% of TPU, 8% of an opening agent, 4% of color master batch and 3% of butadiene rubber, drying for 4 hours at 104 ℃ in a dryer and uniformly stirring;
2) sucking the mixed and dried tire tube rubber material into a hopper of a tire tube extruder through a vacuum suction machine, wherein the hopper of the tire tube extruder is kept at a constant temperature of 80 ℃ all the time in the production process, so that the secondary moisture of the raw material is avoided;
3) the tire tube extruder is controlled by four temperature zones, and the four temperature zones of the tire tube extruder are respectively set as the following heating temperatures: 175 ℃, 186 ℃, 195 ℃, die temperature set to: extrusion rate at 190 ℃, 185 ℃, 180 ℃: the rotating speed is 13.75;
4) starting the extruder for preheating, and starting a screw of the tube extruder for extruding when the temperature of each section reaches a set value;
5) adjusting the water yield of the liquid cooling system to cool the cooled TPU tire tube, so that the inner wall cannot be adhered and cannot be corrugated;
6) adjusting an air cooling shaping system to stabilize the diameter of the TPU tire tube, and drying the cooling liquid on the tube wall;
7) conveying the TPU tire tube to an ink-jet printer through a conveyor belt, and carrying out ink-jet printing on the character contents such as product trademarks, serial numbers, installation prompts and the like;
8) the TPU tyre tube after code spraying continues to be conveyed to the tractor through the conveying belt, enters the servo cutting machine through the tractor, is accurately cut to obtain a TPU inner tube, and the length of the TPU inner tube is 202 cm:
9) the diameter of the extruded pipe is manually checked by a go gauge and a no-go gauge, and product quality indexes such as wall thickness, surface smoothness, length and the like are detected; the specific criteria are as follows:
(1) if the diameter of the TPU tire tube is larger than a standard value, the speed of the tractor needs to be increased and the rotating speed of the screw needs to be reduced, and if the diameter of the outlet tube is smaller than the standard value, the speed of the tractor needs to be reduced and the rotating speed of the screw needs to be increased.
(2) If the wall thickness of the TPU tire tube is too thin or too thick, or the wall thickness is not uniform or eccentric, the die head of the tire tube extruder needs to be adjusted.
(3) If the wall of the TPU tire tube is not smooth and water ripples appear, the water yield of the water cooling system needs to be adjusted.
(4) If the TPU tire tube is unqualified in length, the servo cutting machine is adjusted to be matched with the tractor in speed.
Secondly, air tap injection molding production:
1) mixing the air faucet rubber material according to the proportion of 96 percent of TPU and 4 percent of color master batch, drying for 4 hours in a dryer at 75 ℃, and uniformly stirring;
2) sucking the mixed and dried air faucet glue stock into a hopper of an air faucet injection molding machine through a vacuum suction machine, wherein the hopper of the air faucet injection molding machine is kept at a constant temperature of 60 ℃ all the time in the production process, so that the raw material is prevented from being secondarily damped;
3) installing the air nozzle mold into an air nozzle injection molding machine;
4) the air nozzle injection molding machine is controlled by adopting three temperature zones, wherein the temperature of an air nozzle mold is set to be 40 ℃, the heating temperatures of the three temperature zones are respectively set to be 215 ℃, 225 ℃ and 230 ℃, the injection pressure is 2000psi, the temperature of a die head is set to be 230 ℃, and the extrusion rotating speed is 150 rpm;
5) starting the injection molding machine for preheating, and starting a screw of the air nozzle injection molding machine for injection molding when the temperature of each section reaches a set value;
because the temperature of the initial machine is uneven, the front 100 moulds may have incomplete injection molding, bubbles exist in injection molding parts and the like, products can be gradually stabilized after the 100 moulds, and finished products can be collected; because of the inside screw thread of moulding plastics that contains of air cock, consequently the injection mould has automatic dismantlement screw thread system, and mould internal design has prevented the skid tooth circle, and the air cock after conveniently moulding plastics can rotatory dropout be dismantled, and can not lead to the fact the damage to the screw thread of moulding plastics.
Thirdly, injection molding production of the air nozzle adapter sheet:
1) mixing the air tap adapter sheet rubber material according to the proportion of 96 percent of TPU and 4 percent of color master, drying for 4 hours at 80 ℃ in a dryer and uniformly stirring;
2) sucking the mixed and dried raw materials into a hopper of an air nozzle adapter sheet injection molding machine through a vacuum suction machine, wherein the hopper of the air nozzle adapter sheet injection molding machine is kept at a constant temperature of 65 ℃ all the time in the production process, so that the raw materials are prevented from being secondarily damped;
3) installing the air nozzle adapter sheet mold into an air nozzle adapter sheet injection molding machine;
4) the air nozzle adapter sheet injection molding machine is controlled by adopting three temperature zones, the temperature of a mold is set to be 40 ℃, the heating temperatures of the three temperature zones are respectively set to be 210 ℃, 220 ℃ and 225 ℃, the injection pressure is 2200psi, the temperature of a die head is 225 ℃, and the extrusion rotating speed is 170 rpm;
5) and starting the injection molding machine for preheating, and starting the screw for injection molding when the temperature of each section reaches a set value.
6) Inserting the air faucet produced in the step into an air faucet adapter sheet die, wherein a supporting pin for supporting the air faucet in the die is inserted into a platform inside the air faucet for supporting due to high secondary injection pressure, and if the external end face is directly supported, the threads of the air faucet are deformed and damaged under the high pressure of secondary injection; finally, the air nozzle with the adapter sheet is obtained.
Fourthly, punching the tyre tube:
1) punching the TPU tire tubes by adopting an autonomously developed pneumatic punching machine, wherein 5 TPU tire tubes can be punched each time;
2) respectively inserting 5 TPU tire tubes into a punching die, wherein the punching position is 6.5cm from the center of a hole to the end face of the tire tube;
3) flattening a disc at the bottom of the air faucet with the adapter sheet prepared in the step, placing the disc into a TPU tire tube from the punched hole, wherein the adapter sheet is arranged in the tire tube, and the air faucet is arranged outside the tire tube;
4) starting the high-frequency welding machine, and adjusting the high-frequency current to 3.1A;
5) the right foot steps down the positioning pedal to ensure that the welding mould is fully contacted with the bottom of the air faucet;
6) after the position is determined, the right foot is kept still when being stepped on, the left foot is used for stepping down the power-on pedal, the power-on time is adjusted to 4-5 seconds, and then the welding of the air faucet is completed;
fifthly, closed-loop welding of the tire tube:
1) starting the high-frequency welding machine, and adjusting the high-frequency current to 1.2A;
2) and (3) coating silicone insulating lubricating grease on the inner wall of the port of the TPU tire tube on one side close to the air nozzle rod, wherein the coating width is 2cm, and after the coating is finished, the outer wall of the tire tube is pinched by hands to rub up and down, left and right, so that the insulating lubricating grease is fully and uniformly coated on the inner wall.
3) Inserting a section of the tube coated with the insulating grease into the inner side of one end which is not coated with the insulating grease, wherein the step can not be reversed, and the insertion length is 1.5 cm;
4) placing two sections of superposed 1.5cm tire tubes on a mold of a high-frequency welding machine, and treading down a positioning pedal by a right foot to ensure that the welding mold is fully contacted with the bottom of an air faucet;
5) after the position is determined, the right foot is kept still when being stepped on, the left foot is used for stepping down the power-on pedal, the power-on time is adjusted to be 3 seconds, and then the closed-loop welding of the tire tube is completed.
The preparation method of the TPU ultralight bicycle inner tube comprises the following steps: the accurate addition amount of the opening agent and the butadiene rubber can greatly enhance the elasticity and the toughness of the inner tube, increase the smoothness of the inner surface and the outer surface of the inner tube and not change the inherent material characteristic advantages of the TPU. Thereby making the installation of the inner tube easier and greatly reducing the possibility of snake bite of the inner tube on the bumpy road surface. The wall thickness of the inner tube is 0.18mm-0.22mm, and the requirement of the inner tube wall is very smooth. Therefore, the requirement on the die head process is high, and the adjustment needs to be very careful. Because the tyre wall is too thin, the tube-forming cooling needs water cooling and air filling cooling to be used simultaneously, the tyre tube can be rapidly cooled and formed, and meanwhile, the water quantity and the air quantity need to be accurately controlled, so that the tyre wall cannot deform.
Test 1
For inner tubes of different brands and different materials, the weight test and the tire resistance test (the unit of the tire resistance is Nm/m) under different tire pressures (the test is adjusted to 42.5 kg/417N for load and 29kmh/18mph for speed) of the TPU inner tube prepared by the invention are shown in the table 1:
TABLE 1
From the above table, the TPU inner tube prepared by the preparation method of the TPU ultra-light bicycle inner tube has the lightest weight, the first tire resistance and the third tire resistance, and the surface TPU inner tube has good tire resistance performance under the condition of the lightest weight.
Test 2
Aiming at the inner tube of Victoria Latex 25/28 model, the air tightness test is carried out on the inner tube and the TPU inner tube prepared by the invention, the original tire pressure is 6.9bar, the tire pressure measurement is respectively carried out for 24 hours, 48 hours, 72 hours and 96 hours, and the measurement results are shown in Table 2;
| inner tube type | 0 hour | 24 hours | 48 hours | 72 hours | 96 hours |
| TPU inner tube prepared by the invention | 6.9 | 6.6 | 6.3 | 6.1 | 5.9 |
| Victoria Latex 25/28 | 6.9 | 6.0 | 5.2 | 4.8 | 4.4 |
As can be seen from the above table, the TPU inner tube prepared by the method of the present invention has better air tightness compared with the inner tube of victoria Latex 25/28 type.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
In the description of the present invention, it is to be noted that the description is made for convenience only and for simplicity, and it is not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be taken as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (8)
1. A preparation method of a TPU (thermoplastic polyurethane) ultra-light bicycle inner tube comprises the following steps:
s1, putting the tube rubber material consisting of TPU, a tapping agent, color master and butadiene rubber into a dryer, drying for 4 hours at 104 ℃ and uniformly stirring;
s2, putting the dried tire tube rubber material into a hopper of a tire tube extruder, obtaining a TPU tire tube through the tire tube extruder, and cooling and shaping the TPU tire tube;
s3, conveying the TPU tire tube into an ink-jet printer to perform ink-jet printing;
s4, conveying the code-sprayed TPU tire tube to a tractor, and cutting the TPU tire tube through the tractor and a cutting machine to obtain a TPU inner tube;
s5, putting the air tap rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s6, putting the dried air faucet glue into a hopper of an air faucet injection molding machine, installing an air faucet mold into the air faucet injection molding machine, and obtaining a TPU air faucet through the air faucet mold;
s7, putting the air tap adapter sheet rubber material consisting of TPU and color master into a dryer, drying for 4 hours at the temperature of 80 ℃, and uniformly stirring;
s8, putting the dried air nozzle adapter sheet rubber material into a hopper of an air nozzle adapter sheet injection molding machine, installing an air nozzle adapter sheet mold into the air nozzle adapter sheet injection molding machine, inserting the TPU air nozzle obtained in the step S6 into the air nozzle adapter sheet mold, and obtaining the TPU air nozzle with the adapter sheet through the air nozzle adapter sheet mold;
s9, punching the TPU inner tube obtained in the step S4, inserting the TPU air nozzle with the adapter sheet into the TPU inner tube from the hole of the punched hole, and welding the TPU inner tube through a high-frequency welding machine;
and S10, performing closed-loop welding on the TPU inner tube processed in the step S9 through a high-frequency welding machine to obtain the TPU ultra-light bicycle inner tube.
2. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S1: the rubber material for the tire tube comprises the following raw materials in percentage by weight: TPU85, opening agent 8, color master batch 4 and butadiene rubber 3.
3. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S2: the rubber material of the tire tube is kept at 80 ℃ in a hopper of the tire tube extruder, so that the rubber material is prevented from being damped secondarily.
4. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S4: the length of the TPU inner tube is 202 cm.
5. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S5: the air tap sizing material comprises the following raw materials in percentage by weight: TPU 96 and color master batch 4.
6. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S6: the air tap sizing material is kept at 65 ℃ in a hopper of the air tap injection molding machine, so that the air tap sizing material is prevented from being secondarily damped.
7. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S7: the air faucet adapter sheet rubber material comprises the following raw materials in percentage by weight: TPU 96 and color master batch 4.
8. The method for preparing the TPU ultra-light bicycle inner tube according to claim 1, wherein in step S8: the air nozzle adapter piece rubber material is kept at 65 ℃ in a hopper of the air nozzle adapter piece injection molding machine, and secondary moisture of the air nozzle rubber material is avoided.
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| CN202111492464.5A CN114311780A (en) | 2021-12-08 | 2021-12-08 | Preparation method of TPU (thermoplastic polyurethane) ultra-light bicycle inner tube |
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| US5498377A (en) * | 1993-11-22 | 1996-03-12 | Mitsubishi Cable Industries, Ltd. | Production of thermoplastic polyurethane elastomer tube |
| TW201242800A (en) * | 2011-04-27 | 2012-11-01 | Yue-Shiu Hunz | A method of forming an inner tube and a gas nozzle of a tire and a composition of matters |
| CN103203886A (en) * | 2012-01-11 | 2013-07-17 | 四川远星橡胶有限责任公司 | Tire inflating valve installing apparatus and installing technology thereof |
| US20150183283A1 (en) * | 2012-06-18 | 2015-07-02 | Basf Se | Valve for an inflatable hose section |
| CN105462013A (en) * | 2015-12-09 | 2016-04-06 | 安徽世界村新材料有限公司 | Rubber composite material for tire tubes and preparation method of rubber composite material |
| CN108084576A (en) * | 2017-10-24 | 2018-05-29 | 固比斯特科技(宁波）有限公司 | A kind of inner tube of a tyre rubber composition and the pricking-proof explosion-proof tire with the inner tube of a tyre |
| DE102018202798A1 (en) * | 2018-02-23 | 2019-08-29 | Ralf Bohle Gmbh | Method and device for producing a toroidal bicycle hose and bicycle hose |
| CN111775407A (en) * | 2020-08-05 | 2020-10-16 | 周建区 | TPU air nozzle injection mold and injection molding method |
-
2021
- 2021-12-08 CN CN202111492464.5A patent/CN114311780A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5498377A (en) * | 1993-11-22 | 1996-03-12 | Mitsubishi Cable Industries, Ltd. | Production of thermoplastic polyurethane elastomer tube |
| TW201242800A (en) * | 2011-04-27 | 2012-11-01 | Yue-Shiu Hunz | A method of forming an inner tube and a gas nozzle of a tire and a composition of matters |
| CN103203886A (en) * | 2012-01-11 | 2013-07-17 | 四川远星橡胶有限责任公司 | Tire inflating valve installing apparatus and installing technology thereof |
| US20150183283A1 (en) * | 2012-06-18 | 2015-07-02 | Basf Se | Valve for an inflatable hose section |
| CN105462013A (en) * | 2015-12-09 | 2016-04-06 | 安徽世界村新材料有限公司 | Rubber composite material for tire tubes and preparation method of rubber composite material |
| CN108084576A (en) * | 2017-10-24 | 2018-05-29 | 固比斯特科技(宁波）有限公司 | A kind of inner tube of a tyre rubber composition and the pricking-proof explosion-proof tire with the inner tube of a tyre |
| DE102018202798A1 (en) * | 2018-02-23 | 2019-08-29 | Ralf Bohle Gmbh | Method and device for producing a toroidal bicycle hose and bicycle hose |
| CN111775407A (en) * | 2020-08-05 | 2020-10-16 | 周建区 | TPU air nozzle injection mold and injection molding method |
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