CN113524748B - Vulcanizing mold for foldable spare tire - Google Patents
Vulcanizing mold for foldable spare tire Download PDFInfo
- Publication number
- CN113524748B CN113524748B CN202110929688.1A CN202110929688A CN113524748B CN 113524748 B CN113524748 B CN 113524748B CN 202110929688 A CN202110929688 A CN 202110929688A CN 113524748 B CN113524748 B CN 113524748B
- Authority
- CN
- China
- Prior art keywords
- side plate
- clamping
- chuck
- clamping blocks
- center rod
- 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.)
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000003825 pressing Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000009956 central mechanism Effects 0.000 claims abstract description 5
- 230000008602 contraction Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 14
- 239000002775 capsule Substances 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
-
- 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
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0603—Loading or unloading the presses
-
- 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
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- 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
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
-
- 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
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0662—Accessories, details or auxiliary operations
- B29D2030/0666—Heating by using fluids
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention relates to a vulcanizing mould of a foldable spare tire, wherein an upper side plate and a lower side plate are respectively provided with rings which are consistent with the shapes of an upper folding part and a lower folding part of the tire, and a reserved gap is arranged at a bolt position of an upper cover by a bolt of a middle die sleeve connected with the upper cover; the upper central rod and the lower central rod of the upper and lower lifting central mechanism are provided with central air outlet holes and air pumping holes; the upper chuck of the upper chuck opening and contracting mechanism comprises a plurality of expandable and contractible clamping blocks I, and the clamping blocks I slide radially along a guide groove I arranged on the upper steel ring through the guide blocks I; lifting the upper center rod drives the upper pressing disc to link each clamping block I to form radial expansion and contraction of the upper chuck; the lower chuck of the lower chuck opening and contracting mechanism comprises a plurality of expandable and contractible clamping blocks II, and the clamping blocks II slide radially along a guide groove II arranged on the lower steel ring through the guide blocks II; the lifting of the lower center rod drives the lower pressing disc to link each clamping block II to form radial expansion and contraction of the lower chuck. Has the advantages of no capsule, and universal tyre loading and unloading.
Description
Technical Field
The present invention relates to a vulcanizing mold for a foldable spare tire.
Background
At present, a tire vulcanizing process generally adopts capsule expansion to support a tire blank, and heat transfer is used for vulcanizing the tire. Because the service life of the capsule is limited, under the condition that the service life of the capsule exceeds the service life in actual production, the capsule is exploded, the tire is scrapped, and even safety accidents are caused. The folding spare tyre can be removed by forced demoulding due to shallow tread depth, and is mainly applied to SUV vehicle type. The development and application of the vehicle-mounted tire solves the problem that the spare tire occupies the space of the trunk. The foldable spare tire is inflated after being mounted on the hub, and the foldable tire expands the storage part to enlarge the diameter of the tire to reach the designed outer diameter.
Disclosure of Invention
The invention aims to solve the problems and provide a curing mold for a foldable spare tire which is free of capsules and is universal for loading and unloading.
The purpose of the invention is realized in the following way: the device comprises an upper cover, an upper side plate, an upper movable side plate, a middle die sleeve, a lower movable side plate, a lower side plate, a base, an upper and lower lifting center mechanism, an upper chuck expanding and contracting mechanism and a lower chuck expanding and contracting mechanism; the lower part of the upper cover is connected with an upper side plate, the upper side plate is provided with a ring which is consistent with the shape of an upper folding part of the tire, a reserved gap is arranged at a bolt position of the upper cover, and the upper movable side plate is connected with the upper side plate through a spring I and positioned through a positioning pin; the upper part of the base is connected with a lower side plate, the lower side plate is provided with a ring which is consistent with the shape of the lower folding part of the tire, and the lower movable side plate is connected with the lower side plate through a spring II and guided by a guide pin; the upper and lower lifting central mechanism comprises an upper central rod, a lower central rod, an upper central rod sleeve and a lower central rod sleeve, and central air outlet and air suction holes are formed in the upper central rod and the lower central rod; the upper chuck opening and contracting mechanism comprises an upper chuck, an upper pressing disc and an upper steel ring; the upper clamping plate comprises a plurality of clamping blocks I which can be opened and contracted, the outer end of each clamping block I is connected with a guide block I, and when the upper steel ring is driven by the upper center rod sleeve to lift relative to the upper center rod, each clamping block I radially slides along a guide groove I arranged on the upper steel ring through the guide block I; the inner end of each clamping block I is connected with an upper pressing disc through a connecting rod I, and the upper pressing disc is driven to be linked with each clamping block I through the lifting of an upper center rod so as to form a radial expanding and contracting structure of an upper clamping disc; the lower chuck opening and contracting mechanism comprises a lower chuck, a lower pressing disc and a lower steel ring; the lower clamping plate comprises a plurality of clamping blocks II which can be expanded and contracted, the outer end of each clamping block II is connected with a guide block II, and when the lower steel ring is driven by the lower center rod sleeve to lift relative to the lower center rod, each clamping block II radially slides along a guide groove II arranged on the lower steel ring through the guide block II; the inner end of each clamping block II is connected with the lower pressing disc through a connecting rod II, and the lower pressing disc is driven to be linked with each clamping block II through the lifting of the lower center rod so as to form a radial expanding and contracting structure of the lower clamping disc.
The upper clamping plate comprises four large clamping blocks I and four small clamping blocks I, wherein the large clamping blocks I and the small clamping blocks I are arranged in a crossing manner according to an expandable and contractible structure; the lower clamping plate comprises four large clamping blocks II and four small clamping blocks II, and the large clamping blocks II and the small clamping blocks II are arranged in a crossing manner according to an expandable and contractible structure.
According to the invention, the upper side plate and the upper center rod sleeve form a sealing sleeve structure through a sealing ring I; the lower side plate and the lower center rod sleeve form a sealing sleeve structure through a sealing ring II.
The invention has the advantages that as the mould for producing the foldable tire adopts the movable chuck to clamp and fix the mould, the upper and lower central rods are used for discharging steam and exhausting air, the function assists the foldable spare tire mould to vulcanize and recycle the steam; the mold design scheme designs the clamp into a movable structure, and the vulcanizing machine drives the connecting rod transmission mechanism to be converted into radial expansion and contraction actions of the upper chuck and the lower chuck through the stretching and contraction actions of the central mechanism, so that the upper chuck and the lower chuck compress a tire blank and loosen a tire, and the purpose of general tire loading and unloading is achieved; the center movable clamping mechanism is adopted for the foldable tire, so that the bladder structure adopted by the traditional vulcanization process is reduced while the tire body is fixed, and the scrapping condition of the tire in the vulcanization process due to the service life of the bladder is reduced.
The invention is further illustrated by the following examples in conjunction with the accompanying description.
Drawings
FIG. 1 is a schematic diagram of the structure of one embodiment of the present invention;
FIG. 2 is a schematic diagram of the open mold structure of the embodiment of FIG. 1;
FIG. 3 is a schematic view of the upper or lower chuck of the embodiment of FIG. 1 in an open configuration;
Fig. 4 is a schematic view of the upper or lower chuck of the embodiment of fig. 1 in a contracted state.
In the figure, 1, an upper cover; 2. an upper side plate; 3. an upper movable side plate; 4. a middle die sleeve; 5. a lower movable side plate; 6. a lower side plate; 7. a base; 8. a tire; 9. a ring; 10. a bolt; 11. a positioning pin; 12. a spring I; 13. a guide pin; 14. a spring II; 15. a steel ring is arranged; 16. an upper center rod sleeve; 17. an upper platen; 18. an upper center rod; 19. clamping block I; 20. a guide block I; 21. a guide groove I; 22. a lower steel ring; 23. a lower center rod sleeve; 24. a lower platen; 25. a lower center rod; 26. clamping blocks II; 27. a guide block II; 28. a guide groove II; 29. a sealing ring I; 30. a sealing ring II; 31. a connecting rod I; 32. a connecting rod II; d. a gap is reserved.
Detailed Description
Referring to fig. 1 to 4, the present embodiment is a vulcanizing mold for a foldable spare tire, comprising an upper cover 1, an upper side plate 2, an upper movable side plate 3, a middle die sleeve 4, a lower movable side plate 5, a lower side plate 6, a base 7, an up-down lifting center mechanism, an upper chuck expanding and contracting mechanism and a lower chuck expanding and contracting mechanism; the lower part of the upper cover is connected with an upper side plate, the upper side plate is provided with a ring 9 which is consistent with the shape of an upper folding part of the tire 8, a reserved gap d is arranged at a bolt position of the upper cover, and the upper movable side plate is connected with the upper side plate through a spring I12 and positioned through a positioning pin 11; the upper part of the base is connected with a lower side plate, the lower side plate is provided with a ring which is consistent with the shape of a lower folding part of the tire, and the lower movable side plate is connected with the lower side plate through a spring II 14 and is guided by a guide pin 13; the upper and lower lifting central mechanism comprises an upper central rod 18, a lower central rod 25, an upper central rod sleeve 16 and a lower central rod sleeve 23, wherein the upper central rod and the lower central rod are provided with central air outlet and air suction holes; the upper chuck opening and contracting mechanism comprises an upper chuck, an upper pressing disc 17 and an upper steel ring 15; the upper clamping chuck consists of four large clamping blocks I and four small clamping blocks I19 which can be expanded and contracted in a crossed manner, the outer end of each clamping block I is connected with a guide block I20, and when the upper steel ring is driven by the upper center rod sleeve to lift relative to the upper center rod, each clamping block I radially slides along a guide groove I21 arranged on the upper steel ring through the guide block I; the inner end of each clamping block I is connected with an upper pressing disc through a connecting rod I31, and the upper pressing disc is driven to be linked with each clamping block I through the lifting of an upper center rod so as to form a radial expanding and contracting structure of an upper clamping disc; the lower chuck opening and closing mechanism comprises a lower chuck, a lower pressure plate 24 and a lower steel ring 22; the lower clamping chuck consists of four large clamping blocks II and four small clamping blocks II 26 which can be expanded and contracted in a crossed manner, the outer end of each clamping block II is connected with a guide block II 27, and when the lower steel ring is driven by the lower center rod sleeve to lift relative to the lower center rod, each clamping block II radially slides along a guide groove II 28 arranged on the lower steel ring through the guide block II; the inner end of each clamping block II is connected with a lower pressing disc through a connecting rod II 32, and the lower pressing disc is driven to be linked with each clamping block II through the lifting of a lower center rod so as to form a radial expanding and contracting structure of the lower clamping disc; the upper side plate and the upper center rod sleeve form a sealing sleeve structure through a sealing ring I29; the lower side plate and the lower center rod sleeve form a sealing sleeve structure through a sealing ring II 30.
The working process of the invention is as follows: when the vulcanization of the foldable spare tire is completed, the steam in the tire is pumped out through the central pipelines of the upper central rod and the lower central rod, pumped to-0.03 MPA, and then air is introduced. Immediately, the upper center rod starts to extend downwards, the upper center rod sleeve moves downwards, the moving speed is smaller than that of the upper center rod, the upper chuck is driven to shrink, namely, four large clamping blocks I and four small clamping blocks I, the four large clamping blocks I and the four small clamping blocks I respectively move in sequence through connecting rods I to reach a set stroke, and the rim of the upper chuck breaks away from clamping the edge of the tire.
When the die starts to act, the upper center rod sleeve and the upper center rod move upwards along with the die, the upper cover is driven by the upper hot plate of the vulcanizing machine to lift upwards to drive the upper side plate to move upwards, as the reserved gap is arranged at the bolt position of the upper cover, which is connected with the middle die sleeve, the upper moving side plate is firstly demoulded under the action of the spring I, and when the bolt reaches the reserved space, the middle die sleeve starts to be driven to move upwards, and at the same time, the lower moving side plate moves upwards under the action of the spring II to enable the tire to move upwards. As the upper mold portion continues to lift, the tire comes off the upper side plate. After the lifting height of the middle die sleeve exceeds the upper sidewall of the tire, the upper central rod and the upper central rod sleeve start to shrink back, after the set height is reached, the lower central rod starts to extend upwards, four large clamping blocks II and four small clamping blocks II of the lower chuck are driven by the lower pressure plate to shrink radially through the guide blocks II, and when the set position is reached, the lower chuck is disconnected from the tire clamping position. The lower center rod sleeve starts to extend upwards and is separated from the lower side plate through the ejection of the tire by the lower steel ring, the tire is taken out by the manipulator, and the mold opening is completed.
When the next vulcanization cycle starts, the tire blank is mechanically sent to the lower steel ring position under the shrinkage state of the lower clamping plate, the lower central rod starts to descend, and the lower pressing plate drives the connecting rod II to enable the lower clamping plate to perform radial expansion along the guide block II, so that the lower part of the tire blank is clamped. The upper central rod sleeve and the upper central rod extend out, the upper chuck is contracted in place, then the upper central rod sleeve continuously descends to contact the tire blank, the upper central rod sleeve extends out to stop, the upper central rod starts to contract, the upper chuck is driven by the upper pressure plate to perform radial opening motion along the guide block I, the upper sub-opening part of the tire blank is clamped at the upper steel ring part, then the manipulator moves away from the vulcanizing machine, and the upper central rod and the lower central rod pump air to the inside of the tire blank, so that the crown part of the tire blank starts to shrink. The lower steel ring and the lower chuck move downwards under the synchronous driving of the lower center rod sleeve and the lower center rod, and the lower steel ring is contacted with the lower side plate; the upper center rod sleeve and the upper center rod synchronously move downwards to the die closing position while the lower center rod acts, and then stop. The upper hot plate of the sulfur cargo aircraft starts to move downwards, after the middle die sleeve is contacted with the lower movable side plate, the lower movable side plate moves downwards along the guide pin to be contacted with the plane of the lower side plate and then stops, and the lower conical surface of the middle die sleeve continues to move downwards until contacting and attaching with the base. And the parting surface on the middle die sleeve is contacted with the upper movable side plate and then moves upwards until the parting surface is attached to the upper side plate, the upper matching surface of the middle die sleeve is matched with the conical surface of the upper cover, and the die assembly is completed. And the upper central rod and the lower central rod begin to be inflated with steam, so that the embryo is attached along the outline of the die, and shaping and vulcanization are carried out.
According to the invention, the inner guide block ensures that the expanding and contracting actions of the upper chuck and the lower chuck move along the appointed radial direction; positioning pins and guide pins are adopted for positioning and guiding, and the springs can assist in demolding.
Claims (1)
1. A vulcanizing mold for a foldable spare tire, comprising: the device comprises an upper cover (1), an upper side plate (2), an upper movable side plate (3), a middle die sleeve (4), a lower movable side plate (5), a lower side plate (6), a base (7), an upper and lower lifting center mechanism, an upper chuck expanding and contracting mechanism and a lower chuck expanding and contracting mechanism;
the lower part of the upper cover is connected with an upper side plate, the upper side plate is provided with a ring (9) which is consistent with the shape of an upper folding part of the tire (8), a reserved gap (d) is formed in a bolt position of the upper cover, which is connected with a bolt (10) of a middle die sleeve, and the upper movable side plate is connected with the upper side plate through a spring I (12) and is positioned through a positioning pin (11);
the upper part of the base is connected with a lower side plate, the lower side plate is provided with a ring which is consistent with the shape of a lower folding part of the tire, and the lower movable side plate is connected with the lower side plate through a spring II (14) and guided by a guide pin (13);
The upper and lower lifting central mechanism comprises an upper central rod (18), a lower central rod (25), an upper central rod sleeve (16) and a lower central rod sleeve (23), and central air outlet and air suction holes are formed in the upper central rod and the lower central rod;
the upper chuck opening and shrinking mechanism comprises an upper chuck, an upper pressing disc (17) and an upper steel ring (15); the upper clamping plate comprises a plurality of clamping blocks I (19) which can be opened and contracted, the outer end of each clamping block I is connected with a guide block I (20), and when the upper steel ring is driven by the upper center rod sleeve to lift relative to the upper center rod, each clamping block I radially slides along a guide groove I (21) arranged on the upper steel ring through the guide block I; the inner end of each clamping block I is connected with an upper pressing disc through a connecting rod I (31), and the upper pressing disc is driven to be linked with each clamping block I through the lifting of an upper center rod so as to form a radial expansion and contraction structure of an upper clamping disc;
The lower chuck opening and shrinking mechanism comprises a lower chuck, a lower pressing disc (24) and a lower steel ring (22); the lower clamping plate comprises a plurality of clamping blocks II (26) which can be opened and contracted, the outer end of each clamping block II is connected with a guide block II (27), and when the lower steel ring is driven by the lower center rod sleeve to lift relative to the lower center rod, each clamping block II radially slides along a guide groove II (28) arranged on the lower steel ring through the guide block II; the inner end of each clamping block II is connected with a lower pressing disc through a connecting rod II (32), and the lower pressing disc is driven to be linked with each clamping block II through the lifting of a lower center rod so as to form a radial expanding and contracting structure of the lower clamping disc;
The upper clamping plate comprises four large clamping blocks I and four small clamping blocks I, and the large clamping blocks I and the small clamping blocks I are arranged in a crossing manner according to an expandable and contractible structure; the lower clamping plate comprises four large clamping blocks II and four small clamping blocks II, and the large clamping blocks II and the small clamping blocks II are arranged in a crossing manner according to an expandable and contractible structure;
The upper side plate and the upper center rod sleeve form a sealing sleeve structure through a sealing ring I (29); the lower side plate and the lower center rod sleeve form a sealing sleeve structure through a sealing ring II (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929688.1A CN113524748B (en) | 2021-08-13 | 2021-08-13 | Vulcanizing mold for foldable spare tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110929688.1A CN113524748B (en) | 2021-08-13 | 2021-08-13 | Vulcanizing mold for foldable spare tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113524748A CN113524748A (en) | 2021-10-22 |
| CN113524748B true CN113524748B (en) | 2024-07-16 |
Family
ID=78091024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110929688.1A Active CN113524748B (en) | 2021-08-13 | 2021-08-13 | Vulcanizing mold for foldable spare tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113524748B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215283484U (en) * | 2021-08-13 | 2021-12-24 | 巨轮智能装备股份有限公司 | Vulcanization mold of foldable spare tire |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201105490Y (en) * | 2007-10-24 | 2008-08-27 | 桂林橡胶机械厂 | Center mechanism of tyre shaping vulcanizer |
| JP5270241B2 (en) * | 2008-07-11 | 2013-08-21 | 株式会社神戸製鋼所 | Center mechanism of tire vulcanizer and mold operation method of tire vulcanizer |
| CN202922810U (en) * | 2012-12-12 | 2013-05-08 | 广东巨轮模具股份有限公司 | Air-exhaust-type movable mold for automobile radial tire |
| CN107972234A (en) * | 2017-11-27 | 2018-05-01 | 巨轮智能装备股份有限公司 | A kind of injecting molding die of solid tyre and its method for producing solid tyre |
-
2021
- 2021-08-13 CN CN202110929688.1A patent/CN113524748B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215283484U (en) * | 2021-08-13 | 2021-12-24 | 巨轮智能装备股份有限公司 | Vulcanization mold of foldable spare tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113524748A (en) | 2021-10-22 |
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