CN104848002A - Control method for heat-insulating layer structural uniformity - Google Patents
Control method for heat-insulating layer structural uniformity Download PDFInfo
- Publication number
- CN104848002A CN104848002A CN201510246498.4A CN201510246498A CN104848002A CN 104848002 A CN104848002 A CN 104848002A CN 201510246498 A CN201510246498 A CN 201510246498A CN 104848002 A CN104848002 A CN 104848002A
- Authority
- CN
- China
- Prior art keywords
- pneumatic bag
- rubber pneumatic
- insulation layer
- heat insulation
- inflation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
A control method for heat-insulating layer structural uniformity belongs to the technical field of solid rocket motor heat-insulating layer manufacturing, The method sequentially includes the steps: preparation, evacuation, inflation and exhausting, inflation and rotation. The structural uniformity of the heat-insulating layer can be improved through the above steps. Due to the conversion between the inflation and the exhausting of a rubber air bag and the speed controlling of the inflation and exhausting, uniform bulge of each portion of the rubber air bag can be ensured, and the displacement of a sinker arranged on the upper portion of the rubber air bag can be avoided. After the basic bulge of the rubber air bag, rotation and adjustment are conducted, the influence on the thickness of the heat-insulating layer sinker by the gravity can be solved, and thus the purpose of the complete structure and the uniform thickness of the heat-insulating layer can be achieved. The control method for the heat-insulating layer structural uniformity is applied to products in various models, remarkably improves the profile quality of the heat-insulating layer, solves the quality problem that the thickness of the heat-insulating layer is not uniform, and passes the ground test of motors.
Description
Technical field
The invention belongs to solid propellant rocket heat insulation layer manufacturing technology field, be specifically related to a kind of controlling method of insulating structure uniformity.
Background technique
In heat insulation layer overall vacuum paster process, heat insulation layer raw cook is wrapped in rubber pneumatic bag outside and inserts housing relevant position, the stickup of heat insulation layer raw cook and housing is realized in rubber pneumatic bag gas replenishment process, the gas replenishment process of rubber pneumatic bag is that rubber pneumatic bag is heaved to utricule designing shape by flat form, and the process to heat insulation layer raw cook stress application.In this course, heaving of each position of rubber pneumatic bag is not uniformity, and the speed of heaving of the valve position of rubber pneumatic bag is greater than all the other positions, therefore there is the possibility being placed in the displacement of rubber pneumatic bag upper thermal barrier layer raw cook, thus occurs wrinkle and flange.After rubber pneumatic bag is full of, before stress application, the state of heat insulation layer raw cook is its design point, paste for avoiding heat insulation layer raw cook and occur systematic fold defect, reserve process allowance, heat insulation layer raw cook external diameter is now less than housing inner diameter, and the external diameter of rubber pneumatic bag is less than the minimum diameter of heat insulation layer raw cook simultaneously.In rubber pneumatic bag stress application process, rubber pneumatic bag continues to expand, drive the hoop of heat insulation layer raw cook to extend simultaneously, the thickness of heat insulation layer raw cook also synchronously reduces, and due to the effect of gravity, the decreasing value of each part thickness of heat insulation layer raw cook is inconsistent, upper numerical is greater than bottom, bottom is zero substantially, and top is maximum value, defines the phenomenon of local reduction.If evenly thinning, heat insulation layer raw cook thickness can be taked to reserve the means of surplus, but local reduction is then invalid.In heat insulation layer production process, problem ubiquity in uneven thickness, causes heat insulation layer weight to exceed the quality problems of design objective requirement after reprocessing.
Summary of the invention
The invention provides a kind of controlling method of insulating structure uniformity, insulating structure is complete to reach, thickness is even, thus guarantee the object of quality of product.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of controlling method of insulating structure uniformity, and concrete steps are:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Under the state that calculating, test degree of vacuum are-0.096MPa, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: the motor body of band heat insulation layer raw cook and rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) row's step is filled: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V
1/ 2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle;
Be improved by the structural homogeneity of the heat insulation layer of above-mentioned steps process.
Described 2), in evacuation step, the relative position relation of heat insulation layer raw cook, rubber pneumatic bag and motor body is that heat insulation layer raw cook is positioned at motor body, and rubber pneumatic bag is positioned at heat insulation layer raw cook.
Described 2), before evacuation step, adhesive is smeared in motor body inside.
Described 2) before evacuation step, smear adhesive in motor body inside, and also smear adhesive on heat insulation layer raw cook.
Described 3) fill in row's step, the speeds control of exhaust and inflation is at 50 ~ 60L/min.
Described 4), in aeration step, aeration speed controls at 10 ~ 15L/min.
Described 5), in spin step, rotational speed controls at 10 ~ 15 turns/min.
The inflation of rubber pneumatic bag and the conversion of exhaust process, the speed of controller inflation and exhaust, that can guarantee each position of rubber pneumatic bag heaves uniformity, avoids to be placed in rubber pneumatic bag top raw cook and to be shifted.Before rubber pneumatic bag unaerated to basic expansion, due to the excesssive gap between motor body and heat insulation layer raw cook, carry out rotating movement and the upset that adjustment certainly will drive heat insulation layer raw cook and rubber pneumatic bag, cause heat insulation layer raw cook fold and distortion, and after rubber pneumatic bag is inflated to complete expansion, heat insulation layer raw cook and motor body come in contact, and the object carrying out rotating adjustment cannot realize.Therefore, after rubber pneumatic bag expands substantially, carry out and rotate adjustment, the thickness effect of gravity to heat insulation layer raw cook can be solved, insulating structure is complete to reach, the uniform object of thickness.The present invention has been successfully applied to several type product, and the profile quality of heat insulation layer significantly improves, and solves the quality problems that heat insulation layer is in uneven thickness, and product have passed rocket engine ground test examination.
Embodiment
Further illustrate the present invention below in conjunction with embodiment, but the scope of protection of present invention is not limited to the scope of embodiment's statement.
Embodiment 1:
A controlling method for insulating structure uniformity, mainly comprises the following steps:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Calculate, test degree of vacuum: under-0.096MPa state, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: smear adhesive in motor body inside, the motor body of band heat insulation layer raw cook, rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) row's step is filled: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V
1/ 2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely, the speeds control of exhaust and inflation is at 50L/min;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation, exhaust velocity controls at 10 L/min;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle, rotational speed controls at 10 turns/min.
The profile quality of heat insulation layer adopting the method to make significantly improves, and insulating structure is complete, solve heat insulation layer quality problems in uneven thickness, and product have passed rocket engine ground test examination.
Embodiment 2:
A controlling method for insulating structure uniformity, is characterized in that, mainly comprises the following steps:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Calculate, test degree of vacuum: under-0.096MPa vacuum state, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: smear adhesive in motor body inside, the motor body of band heat insulation layer raw cook, rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) fill row's step: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V1/2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely, the speeds control of exhaust and inflation is at 60L/min;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation, exhaust velocity controls at 15L/min;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle, rotational speed controls at 15 turns/min.
The profile quality of heat insulation layer adopting the method to make significantly improves, and insulating structure is complete, solve heat insulation layer quality problems in uneven thickness, and product have passed rocket engine ground test examination.
Embodiment 3:
A controlling method for insulating structure uniformity, is characterized in that, mainly comprises the following steps:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Calculate, test degree of vacuum: under-0.096MPa vacuum state, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: smear adhesive in motor body inside, and also adhesive is smeared on heat insulation layer raw cook, the motor body of band heat insulation layer raw cook, rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) fill row's step: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V1/2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely, the speeds control of exhaust and inflation is at 60L/min;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation, exhaust velocity controls at 15L/min;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle, rotational speed controls at 15 turns/min.
The profile quality of heat insulation layer adopting the method to make significantly improves, and insulating structure is complete, solve heat insulation layer quality problems in uneven thickness, and product have passed rocket engine ground test examination.
Embodiment 4:
A controlling method for insulating structure uniformity, mainly comprises the following steps:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Calculate, test degree of vacuum: under-0.096MPa state, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: smear adhesive in motor body inside, and also adhesive is smeared on heat insulation layer raw cook, the motor body of band heat insulation layer raw cook, rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) row's step is filled: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V
1/ 2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely, the speeds control of exhaust and inflation is at 55L/min;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation, exhaust velocity controls at 12 L/min;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle, rotational speed controls at 12 turns/min.
The profile quality of heat insulation layer adopting the method to make significantly improves, and insulating structure is complete, solve heat insulation layer quality problems in uneven thickness, and product have passed rocket engine ground test examination.
Claims (7)
1. a controlling method for insulating structure uniformity, is characterized in that, concrete steps are:
1) preparation process: according to motor insulating structure feature, the corresponding rubber pneumatic bag of design and manufaction; Under the state that calculating, test degree of vacuum are-0.096MPa, rubber pneumatic bag heaves required air inlet total amount V completely
1and the air inlet total amount V that rubber pneumatic bag expands required substantially
2; Described heave completely refer to rubber pneumatic bag inflation after, be in and heave but the state do not expanded; After basic expansion refers to rubber pneumatic bag inflation, be in and touch heat insulation layer raw cook but not to the state that heat insulation layer raw cook is exerted pressure;
2) evacuation step: the motor body of band heat insulation layer raw cook and rubber pneumatic bag is pushed vacuum cabin, and vacuumize, degree of vacuum is-0.096MPa;
3) row's step is filled: continue pressurize in vacuum cabin, inflate in rubber pneumatic bag, institute's inflatable body volume is V
1/ 2, then stop inflation, start exhaust, institute's exhaust volume is V
1/ 4, continue to be inflated to V
1/ 2, be again vented, institute's exhaust volume is V
1/ 4, last continuous charge, until rubber pneumatic bag is heaved completely;
4) aeration step: continue pressurize in vacuum cabin, slowly inflate in rubber pneumatic bag, until gas gross reaches V in rubber pneumatic bag
2, stop inflation;
5) spin step: adopt servo vacuum driven by motor motor body at the uniform velocity to rotate a circle;
Be improved by the structural homogeneity of the heat insulation layer of above-mentioned steps process.
2. method according to claim 1, is characterized in that: described 2) in evacuation step, and the relative position relation of heat insulation layer raw cook, rubber pneumatic bag and motor body is that heat insulation layer raw cook is positioned at motor body, and rubber pneumatic bag is positioned at heat insulation layer raw cook.
3. method according to claim 1, is characterized in that: described 2) before evacuation step, smear adhesive in motor body inside.
4. method according to claim 3, is characterized in that: described 2) before evacuation step, smear adhesive in motor body inside, and also smear adhesive on heat insulation layer raw cook.
5. the method according to claim 1-4 any one, is characterized in that: described 3) fill in row's step, the speeds control of exhaust and inflation is at 50 ~ 60L/min.
6. the method according to claim 1-4 any one, is characterized in that: described 4) in aeration step, aeration speed controls at 10 ~ 15L/min.
7. the method according to claim 1-4 any one, is characterized in that: described 5) in spin step, rotational speed controls at 10 ~ 15 turns/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510246498.4A CN104848002B (en) | 2015-05-15 | 2015-05-15 | A kind of control method of insulating structure uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510246498.4A CN104848002B (en) | 2015-05-15 | 2015-05-15 | A kind of control method of insulating structure uniformity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104848002A true CN104848002A (en) | 2015-08-19 |
| CN104848002B CN104848002B (en) | 2017-03-01 |
Family
ID=53847861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510246498.4A Active CN104848002B (en) | 2015-05-15 | 2015-05-15 | A kind of control method of insulating structure uniformity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104848002B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584771A (en) * | 2016-11-03 | 2018-01-16 | 湖北航天化学技术研究所 | Solid propellant rocket internal insulation forming method |
| CN108506649A (en) * | 2017-02-28 | 2018-09-07 | 芜湖美的厨卫电器制造有限公司 | The production method of heat-insulating profile |
| CN108506648A (en) * | 2017-02-28 | 2018-09-07 | 芜湖美的厨卫电器制造有限公司 | The production method of heat-insulating profile |
| CN111361061A (en) * | 2020-03-26 | 2020-07-03 | 上海航天化工应用研究所 | Automatic control system for vacuum paster on heat insulating layer of combustion chamber and operation method |
| CN113818972A (en) * | 2021-05-25 | 2021-12-21 | 西安英利科电气科技有限公司 | Bonding structure and method for thermal insulation layer of solid rocket combustion chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61274919A (en) * | 1985-05-31 | 1986-12-05 | Nissan Motor Co Ltd | Method for laminating insulator preform to inner surface of case |
| JPH0247041A (en) * | 1988-08-09 | 1990-02-16 | Nissan Motor Co Ltd | Method for sticking insulator to inner face of container |
| TWI230222B (en) * | 2003-11-21 | 2005-04-01 | Chung Shan Inst Of Science | Insulator forming method and device thereof for a rocket motor casing |
| CN104494159A (en) * | 2014-11-26 | 2015-04-08 | 上海复合材料科技有限公司 | Production method of tactical missile engine composite shell |
-
2015
- 2015-05-15 CN CN201510246498.4A patent/CN104848002B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61274919A (en) * | 1985-05-31 | 1986-12-05 | Nissan Motor Co Ltd | Method for laminating insulator preform to inner surface of case |
| JPH0247041A (en) * | 1988-08-09 | 1990-02-16 | Nissan Motor Co Ltd | Method for sticking insulator to inner face of container |
| TWI230222B (en) * | 2003-11-21 | 2005-04-01 | Chung Shan Inst Of Science | Insulator forming method and device thereof for a rocket motor casing |
| CN104494159A (en) * | 2014-11-26 | 2015-04-08 | 上海复合材料科技有限公司 | Production method of tactical missile engine composite shell |
Non-Patent Citations (2)
| Title |
|---|
| 惠亚军: "真空加压绝热工艺研究", 《中国化学会第五届全国化学推进剂学术会议论文集》 * |
| 苑玲等: "软模热膨胀法成型发动机燃烧室壳体贴壁内衬", 《宇航材料工艺》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107584771A (en) * | 2016-11-03 | 2018-01-16 | 湖北航天化学技术研究所 | Solid propellant rocket internal insulation forming method |
| CN107584771B (en) * | 2016-11-03 | 2020-05-29 | 湖北航天化学技术研究所 | Method for forming internal heat insulation layer of solid rocket engine |
| CN108506649A (en) * | 2017-02-28 | 2018-09-07 | 芜湖美的厨卫电器制造有限公司 | The production method of heat-insulating profile |
| CN108506648A (en) * | 2017-02-28 | 2018-09-07 | 芜湖美的厨卫电器制造有限公司 | The production method of heat-insulating profile |
| CN111361061A (en) * | 2020-03-26 | 2020-07-03 | 上海航天化工应用研究所 | Automatic control system for vacuum paster on heat insulating layer of combustion chamber and operation method |
| CN113818972A (en) * | 2021-05-25 | 2021-12-21 | 西安英利科电气科技有限公司 | Bonding structure and method for thermal insulation layer of solid rocket combustion chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104848002B (en) | 2017-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104848002A (en) | Control method for heat-insulating layer structural uniformity | |
| CN103341987B (en) | Ω long purlin orthogonal stiffeners composites wallboard co-curing reaction | |
| CN107584771B (en) | Method for forming internal heat insulation layer of solid rocket engine | |
| JP5358272B2 (en) | Unvulcanized tire manufacturing apparatus and unvulcanized tire manufacturing method | |
| CN104886876B (en) | A kind of plasticity footwear material shaping equipment | |
| CN106978578A (en) | A kind of aluminium alloy plate creep age forming method | |
| CN100515745C (en) | Forming process for all steel load radial tyre blank | |
| CN202922966U (en) | Up-rotation PVC (Polyvinyl Chloride) heat shrinkable membrane blowing unit | |
| CN109318442A (en) | A kind of dual density is disposably injection moulded rubber tyre and its production technology | |
| WO2015101202A1 (en) | Synchronous locking device for steel wire bead of tyre building drum | |
| CN107932811A (en) | A kind of dry sleeve insulator vacuum aerating running gate system and its pouring procedure | |
| CN110509585A (en) | The tire moulding method of tyre building machine | |
| CN107716689A (en) | A kind of positive drawing under sheet material inflation back pressure effect is backwards to the compound superplastic forming device of bulging and its method | |
| CN105881937B (en) | Whole double-layer air bag and its manufacturing method for composite molding | |
| CN209381279U (en) | A kind of dual density is disposably injection moulded rubber tyre | |
| JP2011230424A (en) | Method of manufacturing green tire, and side bladder used in the same | |
| CN102744820B (en) | Dual-inflating structure of work arm of rotational molding machine | |
| CN201721048U (en) | Preheating device of tire vulcanizing mould | |
| CN110861334A (en) | Single-color double-density rubber tire capable of being injection-cast and forming process thereof | |
| CN202846796U (en) | Large-torque dual-inflation L-shaped arm of rotational molding machine | |
| CN104875470B (en) | Air distribution system for manufacturing engine heat insulation layer and control method of air distribution system | |
| KR100943820B1 (en) | Tire vulcanizing apparatus and method to improve uniformity and innerliner evenness | |
| CN103085300A (en) | Manufacturing process of double-density/multi-density solid tire group | |
| CN209381688U (en) | A kind of inflatable trouble-proof tire | |
| CN205631169U (en) | Improvement formula tire sulfurization capsule |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |