CN115257034B - Vacuum-pumping segmented mold - Google Patents
Vacuum-pumping segmented mold Download PDFInfo
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- CN115257034B CN115257034B CN202211186739.7A CN202211186739A CN115257034B CN 115257034 B CN115257034 B CN 115257034B CN 202211186739 A CN202211186739 A CN 202211186739A CN 115257034 B CN115257034 B CN 115257034B
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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
- B29D30/06—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/0038—Moulds or cores; Details thereof or accessories therefor with sealing means or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
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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
- B29D30/06—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
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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
- B29D30/06—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
- B29D2030/0617—Venting devices, e.g. vent plugs or inserts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of tire molds and provides a vacuumizing adjustable mold, which comprises an upper tire sidewall mold, a lower tire sidewall mold, a plurality of tire tread molds and a guide ring, wherein the upper tire sidewall mold is provided with a plurality of grooves; the upper end of the guide ring is provided with a mounting ring, and the periphery of the lower tire side die is provided with a sealing ring protruding upwards; a support table is formed on the inner periphery of the mounting ring, a concave part is formed on the outer side of the upper part of the upper tire side mold, a first sealing plate is arranged on the support table, and the first sealing plate is supported on the support table and is positioned above the concave part; the sunken part of going up the child side form is provided with the second closing plate, is provided with bearing structure between second closing plate and the last child side form, and bearing structure provides ascending jacking force for the second closing plate. The mutual matching of the sealing ring, the first sealing plate and the second sealing plate is used for increasing the vacuumizing stroke before the die assembly is completed, namely the residual radial stroke of the tread die before the sealing cavity is formed is increased, so that the air between the cavity surface of the tread die and the tire blank is fully vacuumized before the cavity surface of the tread die is contacted with the tire blank, and the problem of rubber shortage of the tire is avoided.
Description
Technical Field
The utility model relates to a tire mould technical field especially relates to a take out vacuum segmented mold utensil.
Background
The tire mold is a key basic device for tire vulcanization production, a large number of vent holes need to be processed on a cavity surface in order to enable gas to be smoothly discharged during tire vulcanization, the gas between a tire blank and a mold tread is passively discharged through the vent holes, and the air is easily subjected to air pocket phenomenon under the influence of temperature and the fluidity of the heated tire blank, so that the tire is lack of glue, the tire edge is not clear, and the service performance and the appearance of the tire are influenced.
The problem of tire mould nest gas is generally solved through evacuation mould in the trade, and evacuation mould can reduce the quantity of the exhaust hole on the die cavity face, realizes initiatively exhausting. However, when the tire has a complex pattern structure and a deep pattern depth, the existing vacuum-pumping mold still has the air pocket problem. In the related art, an upper cover is provided with an upper sealing ring, a bottom plate is provided with a lower sealing ring, and sealing elements at other positions are matched to form sealing on an inner cavity of a mold after the mold is closed, but when the mold forms a sealing cavity, the mold is basically closed, pattern blocks are contacted with a green tire, patterns of the mold cavity and the green tire form a sealing space, and gas in the sealing space cannot be exhausted through vacuum pumping, so that the partial area of the tire is short of rubber.
Disclosure of Invention
In order to solve the technical problem, the present disclosure provides a vacuum-pumping segmented mold.
The invention provides a vacuumizing adjustable die which comprises an upper die body, a lower die body, a plurality of die surface dies and a guide ring, wherein the plurality of die surface dies are sequentially arranged along the circumferential direction to form an annular shape and have upper and lower openings;
the upper end of the guide ring is provided with a mounting ring, a first sealing element is arranged between the mounting ring and the guide ring, the periphery of the lower tire side die is provided with a sealing ring protruding upwards, a second sealing element is arranged between the inner periphery of the sealing ring and the outer periphery of the guide ring, and a vacuumizing opening is formed in the sealing ring or the guide ring;
a support table is formed on the inner periphery of the mounting ring, a concave part is formed on the outer side of the upper part of the upper tire side mold, a first sealing plate is arranged on the support table, a third sealing element is arranged between the outer periphery of the first sealing plate and the support table, and the first sealing plate is supported on the support table and is positioned above the concave part;
the sunken part is provided with the second closing plate, the second closing plate with be provided with bearing structure between the side mould of last child, bearing structure is used for the second closing plate provides ascending jacking force, the periphery of second closing plate with be provided with the fourth sealing member between the interior week of first closing plate, the interior week of second closing plate with be provided with the fifth sealing member between the sunken part.
Optionally, the supporting structure is an elastic supporting structure, and the elastic supporting structure includes a limiting member and an elastic member sleeved on the limiting member;
one of the second sealing plate and the upper sidewall mold is provided with a counter bore, the limiting piece at least partially penetrates through the other of the second sealing plate and the upper sidewall mold through the counter bore and is in limiting fit with the other of the second sealing plate and the upper sidewall mold, and the elastic piece is supported between the second sealing plate and the upper sidewall mold.
Optionally, the limiting member is a limiting screw, the counter bore is formed in the second sealing plate, the upper sidewall mold is provided with a mounting hole corresponding to the counter bore, the upper portion of the mounting hole is formed as a sunken platform, the lower portion of the mounting hole is formed as a threaded hole, the limiting member penetrates through the second sealing plate from the counter bore downward and is in threaded fit with the threaded hole, and the limiting member is supported between the sunken platform and the second sealing plate.
Optionally, a sealing plug is arranged in the counter bore, the sealing plug is located at the top of the limit screw, and the periphery of the sealing plug is in sealing fit with the inner wall of the counter bore.
Optionally, the limiting part is a limiting screw, the counter bore is formed in the upper sidewall mold, the second sealing plate is provided with a mounting hole corresponding to the counter bore, the lower portion of the mounting hole is formed into a sunken platform, the upper portion of the mounting hole is formed into a threaded hole, the limiting part upwards at least partially penetrates through the counter bore, the upper sidewall mold is in threaded fit with the threaded hole, and the limiting part is supported between the upper sidewall mold and the sunken platform.
Optionally, the sum of the sealing stroke L1 of the second sealing plate and the sealing stroke L2 of the first sealing plate is less than or equal to the sealing stroke L3 of the sealing ring;
the sealing structure comprises a support structure, a concave portion, a first sealing plate, a second sealing plate and a guide ring, wherein L1 is the maximum axial displacement which can be generated by the second sealing plate under the action of the resisting and jacking force of the support structure under the sealing and matching state of the inner periphery of the second sealing plate and the outer periphery of the concave portion, L2 is the maximum axial displacement which can be generated by the first sealing plate relative to the second sealing plate under the sealing and matching state of the inner periphery of the first sealing plate and the outer periphery of the second sealing plate, and L3 is the axial distance from the bottom surface of the guide ring to the upper end surface of the lower tire side mold when a sealing cavity is initially formed in the mold closing process.
Optionally, L1 is 8 to 20mm, L2 is 8 to 20mm, and L3 is 20 to 30mm.
Optionally, the tread mold comprises an arch-shaped seat and pattern blocks, the pattern blocks are fixed on the inner side of the arch-shaped seat, and the outer periphery of the arch-shaped seat is connected with the inner periphery of the guide ring in a sliding manner through conical surface fit;
the surface of decorative pattern piece is provided with the flower muscle, the height of flower muscle is h, the interior conical surface of guide ring is theta for axial inclination, and L1 and L2 satisfy: (L1 + L2). Times.tan. Theta. > h.
Optionally, the upper sidewall mold comprises an upper base plate and an upper sidewall plate, the upper sidewall plate is located below the upper base plate and is fixedly connected with the upper base plate, and the recessed portion is formed on the outer side of the upper portion of the upper base plate.
Optionally, the lower sidewall mold comprises a lower substrate and a lower sidewall plate, the lower sidewall plate is located above the lower substrate and fixedly connected with the lower substrate, a sixth sealing element is arranged between the lower substrate and the lower sidewall plate, and the sealing ring is formed on the periphery of the lower substrate.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
according to the vacuumizing adjustable die provided by the embodiment of the disclosure, the sealing ring protruding upwards is arranged on the periphery of the lower tire side die, the first sealing plate is arranged on the support table, the second sealing plate is arranged in the concave part of the upper tire side die, and when the vacuumizing adjustable die is used for die assembly, the vacuumizing stroke before the die assembly is completed is increased through the mutual matching of the sealing ring, the first sealing plate and the second sealing plate, namely, the residual radial stroke of the tire tread die when the sealing cavity is initially formed is increased, so that the air between the cavity surface of the tire tread die and the tire blank can be fully vacuumized before the cavity surface of the tire tread die is contacted with the tire blank, the problem that the air between the cavity surface of the tire tread die and the tire blank cannot be vacuumized due to the fact that the air between the cavity surface of the tire tread die and the tire blank is too early contacted to form a sealing space is solved, and the tire vulcanization quality and the yield are improved; meanwhile, the vacuumizing segmented mold is ensured to have enough vacuumizing travel by the mode that the sealing travel of the first sealing plate and the sealing travel of the second sealing plate are overlapped, the thickness of the upper sidewall mold of the mold is not increased, the material cost is saved, the energy consumption of the running of a vulcanizing machine is reduced, and the like.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of an exemplary mold opening of a vacuum-pumping segmented mold according to the disclosure;
FIG. 2 is a schematic mold closing diagram of a vacuum-pumping segmented mold according to an embodiment of the present disclosure;
FIG. 3 is an enlarged view at A in FIG. 2;
fig. 4 is a schematic view of an elastic support structure according to another embodiment of the present disclosure.
Reference numerals:
1. a guide ring; 2. a mounting ring; 21. a support table; 31. a first seal member; 32. a second seal member; 33. a third seal member; 34. a fourth seal member; 35. a fifth seal member; 36. a sixth seal member; 4. a seal ring; 41. a vacuum pumping port; 5. a recessed portion; 61. a first sealing plate; 62. a second sealing plate; 71. a limiting member; 72. an elastic member; 73. a counter bore; 74. mounting holes; 75. a sealing plug; 81. an arcuate seat; 82. pattern blocks; 91. an upper substrate; 92. an upper tire side plate; 93. a lower substrate; 94. and (4) a lower tire side plate.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Referring to fig. 1 to 4, some embodiments of the present disclosure provide a vacuum pumping segmented mold, including upper sidewall mold, lower sidewall mold, a plurality of tread molds and guide ring 1, a plurality of tread molds are arranged in proper order along circumference and enclose into annular and upper and lower opening, upper sidewall mold is located the upper shed department, lower sidewall mold is located the lower opening department to form the space that is used for holding the child embryo, but the periphery and the guide ring 1 of tread mold are connected that slides, can realize the connection that slides through modes such as guide strip or guide block specifically.
The upper end of the guide ring 1 is provided with a mounting ring 2, a first sealing element 31 is arranged between the mounting ring 2 and the guide ring 1, the periphery of the lower tire side die is provided with a sealing ring 4 protruding upwards, and a second sealing element 32 is arranged between the inner periphery of the sealing ring 4 and the outer periphery of the guide ring 1. And the sealing ring 4 is provided with a vacuum port 41. The first seal 31 may be disposed on the top of the guide ring 1, or on the bottom of the mounting ring 2. The second seal 32 may be provided inside the seal ring 4 or on the outer periphery of the guide ring 1. The evacuation port 41 may also be provided at other locations, such as the upper end of the guide ring 1.
A support table 21 is formed on the inner periphery of the mounting ring 2, a recessed portion 5 is formed on the outer side of the upper portion of the upper sidewall mold, a first seal plate 61 is provided on the support table 21, and the first seal plate 61 is supported on the support table 21 and positioned above the recessed portion 5. A third seal 33 is provided between the outer periphery of the first seal plate 61 and the support base 21. The third seal 33 may be provided on the first seal plate 61 or on the support base 21.
Referring to fig. 1 and 2, the recess 5 of the upper sidewall mold is provided with a second sealing plate 62, a support structure is provided between the second sealing plate 62 and the upper sidewall mold, the support structure is used for providing an upward abutting force for the second sealing plate 62, a fourth sealing member 34 is provided between the outer circumference of the second sealing plate 62 and the inner circumference of the first sealing plate 61, and the fourth sealing member 34 may be provided on the inner circumference of the first sealing plate 61 or the outer circumference of the second sealing plate 62. A fifth seal 35 is provided between the inner periphery of the second seal plate 62 and the recessed portion 5. The fifth seal 35 may be provided on the inner periphery of the second seal plate 62 or on the outer peripheral surface of the recessed portion 5.
Through the arrangement, when the vacuumizing adjustable mold is used for closing the mold, the vacuumizing stroke of the mold before closing the mold is increased through the mutual matching of the sealing ring 4, the first sealing plate 61 and the second sealing plate 62, namely the residual radial stroke of the tread mold when the sealing cavity is initially formed in the mold closing process is increased, as shown in fig. 1, b in the drawing represents an outer curved surface of a tire blank, and c represents a gap between the tread mold and the outer curved surface b of the tire blank when the sealing cavity is initially formed in the mold closing process, so that air between the cavity surface of the tread mold and the tire blank can be fully vacuumized before the cavity surface of the tread mold and the tire blank are contacted, the problem that the air between the cavity surface of the tread mold and the tire blank is not vacuumized to cause the lack of rubber of the tire due to the fact that the sealing space is formed by the premature contact of the cavity surface of the tire blank and the tire blank is avoided, and the tire vulcanization quality and the yield are improved; meanwhile, the vacuumizing segmented mold is ensured to have enough vacuumizing travel by the mode that the sealing travel of the first sealing plate 61 and the sealing travel of the second sealing plate 62 are overlapped, the thickness of the upper sidewall mold of the mold is not increased, the material cost is saved, the energy consumption of the running of a vulcanizing machine is reduced, and the like, and meanwhile, the influence on the mold adjusting height of the vulcanizing machine is also avoided.
It should be noted that the second sealing plate 62 may be a whole plate, or may include at least two sub-sealing plates arranged in sequence along the radial direction of the mold, and the support structure as described above is arranged between each sub-sealing plate and the upper sidewall mold. The plurality of sub-sealing plates are sequentially sleeved, the sealing elements are arranged between the adjacent sub-sealing plates, and the two adjacent sub-sealing plates can axially displace, so that the sealing stroke of the second sealing plate 62 is further increased, and the vacuumizing stroke before the die assembly of the die is completed can be effectively increased.
In this embodiment, the supporting structure is preferably an elastic supporting structure, which ensures smooth mold opening and closing and simple structure. The elastic supporting structure comprises a limiting piece 71 and an elastic piece 72 sleeved on the limiting piece 71; the elastic member 72 is used to abut against the second sealing plate 62, so that the second sealing plate 62 tends to rise, and the limiting member 71 is used to limit the axial stroke of the second sealing plate 62. One of the second sealing plate 62 and the upper sidewall mold is provided with a counter bore 73, the limiting member 71 at least partially penetrates through one of the second sealing plate 62 and the upper sidewall mold through the counter bore 73 and is in limiting fit with the other one of the second sealing plate 62 and the upper sidewall mold, and the elastic member 72 is supported between the second sealing plate 62 and the upper sidewall mold so as to avoid forming a passage for communicating the inside and the outside of the mold and reduce the use of sealing members. In another embodiment, the limiting member 71 may also be a limiting column or the like with a blocking portion at both ends.
Specifically, referring to fig. 3, the stopper 71 is a stopper screw, and the elastic member 72 is a spring. The counter bore 73 is formed in the second seal plate 62, the upper sidewall mold is provided with a mounting hole 74 corresponding to the counter bore 73, the upper portion of the mounting hole 74 is formed as a counter sink, the lower portion of the mounting hole 74 is formed as a threaded hole, the limiting member 71 downwardly penetrates through the second seal plate 62 from the counter bore 73 and is in threaded fit with the threaded hole, and the limiting member 71 is supported between the counter bore 73 and the second seal plate 62. The number of the elastic supporting structures can be multiple, that is, the number of the limiting screws and the number of the springs can be multiple, for example, 4 to 12, and the elastic supporting structures are preferably uniformly distributed along the circumferential direction.
A sealing plug 75 is arranged in the counter bore 73, the sealing plug 75 is positioned at the top of the limiting screw, and the periphery of the sealing plug 75 is in sealing fit with the inner wall of the counter bore 73 through a sealing element.
It should be noted that the above arrangement is only an exemplary arrangement, and does not limit the protection scope of the present invention, and the arrangement of the second sealing plate 62 and the upper sidewall mold may be flexibly adjusted in practical applications. In another possible embodiment, referring to fig. 4, the limiting member 71 is a limiting screw, the counter bore 73 is formed in the upper sidewall mold, the second sealing plate 62 is formed with a mounting hole 74 corresponding to the counter bore 73, a lower portion of the mounting hole 74 is formed as a counter sink, an upper portion of the mounting hole 74 is formed as a threaded hole, the limiting member 71 at least partially penetrates through the upper sidewall mold from the counter bore 73 upward and is in threaded engagement with the threaded hole, and the limiting member 71 is supported between the upper sidewall mold and the counter bore 73.
Of course, in practical applications, the supporting structure is not limited to the supporting structure, and may be replaced by other power mechanisms, for example, a mini cylinder may provide the upward abutting force for the second sealing plate 62, as long as the upward abutting force can be provided for the second sealing plate 62, without departing from the design concept of the present disclosure.
In the present embodiment, the sum of the sealing stroke L1 of the second seal plate 62 and the sealing stroke L2 of the first seal plate 61 is equal to or less than the sealing stroke L3 of the seal ring 4; wherein, L1 is the maximum axial displacement that second seal plate 62 can take place under the effect of bearing force of bearing structure under the sealed cooperation state of the inner periphery of second seal plate 62 and the periphery of depressed part 5, L2 is the maximum axial displacement that first seal plate 61 can take place relative to second seal plate 62 under the sealed cooperation state of the inner periphery of first seal plate 61 and the periphery of second seal plate 62, and L3 is the axial distance of the upper end face of lower sidewall mould of bottom surface distance of guide ring 1 when the initial formation sealed chamber in the mould compound die process. Namely L1+ L2 is less than or equal to L3. In some preferred embodiments, L1+ L2= L3- (5 to 8) mm. Specifically, in order to ensure smooth mold clamping of the mold and facilitate the evacuation operation after the mold clamping is completed, as shown in fig. 2, an axial gap of 5 to 8mm is usually provided between the bottom surface of the guide ring 1 and the upper end surface of the lower sidewall mold after the mold clamping is completed, so that the evacuation operation is performed through the evacuation port 41 provided in the seal ring 4.
It should be noted that, in order not to increase the overall thickness of the upper sidewall mold, the sealing stroke of the upper portion of the guide ring 1 with respect to the upper sidewall mold may be implemented by the superposition of L1 and L2, and the sealing stroke of the lower portion of the guide ring 1 with respect to the lower sidewall mold may be implemented by increasing the height of the sealing ring 4. Therefore, the existing die can be modified without processing a new die, so that the manufacturing cost of the die is reduced.
In some embodiments, referring to FIG. 1, the second seal plate 62 is a unitary plate, the fourth seal 34 is disposed in a groove disposed about the periphery of the second seal plate 62, the fifth seal 35 is disposed in a groove disposed about the periphery of the recess 5, and the second seal 32 is disposed in a groove disposed about the lower periphery of the guide ring 1. When a sealing cavity is initially formed in the mold closing process, the axial distance from the bottom surface of the second sealing plate 62 to the bottom surface of the recessed portion 5 is L1, the axial distance from the fourth sealing element 34 to the fifth sealing element 35 is L2, the axial distance from the bottom surface of the guide ring 1 to the upper end surface of the lower sidewall mold is L3, and L1+ L2 is not more than L3. In some preferred embodiments, L1+ L2= L3- (5 to 8) mm.
Wherein L3 is more than or equal to 20mm. In some preferred embodiments, L1 is 8 to 20mm, L2 is 8 to 20mm, and L3 is 20 to 30mm.
Referring to fig. 1 and 2, specifically, the tread mold comprises an arch seat 81 and a pattern block 82, wherein the pattern block 82 is fixed on the inner side of the arch seat 81, and the outer periphery of the arch seat 81 is in sliding connection with the inner periphery of the guide ring 1 through conical surface matching; the surface of the pattern block 82 is provided with pattern ribs, the height of the pattern ribs is h, the inclination angle of the inner conical surface of the guide ring 1 relative to the axial direction is theta, and L1 and L2 meet the following conditions: (L1 + L2). Times.tan. Theta. > h.
For example, when the inner taper angle θ of the guide ring 1 is 18 °, if L1+ L2=30mm, when the vacuum segmented mold is closed, the arcuate seat 81 radially slides in a direction close to the tire blank under the action of the inner taper of the guide ring 1, so that the block 82 also radially moves toward the tire blank, when the mold is closed to form a sealed cavity, the residual radial stroke L4 of the block 82 is 30 × tan θ =9.75mm, and generally, the height of the rib is less than 10mm, for example, 6-8mm, so that the gas between the block 82 and the tire blank is rapidly discharged through the vacuum-pumping port 41 through the residual gap between the block 82 and the tire blank, thereby preventing the tire from being starved due to the formation of a sealed space caused by the premature contact between the cavity surface of the block 82 and the tire blank, improving the tire vulcanization quality and the yield, making the exhaust of the mold smooth and the dead angle during closing, and the tire blank rubber material is easily filled into the mold.
In other embodiments, the second sealing plate 62 includes at least two sub sealing plates, the at least two sub sealing plates are sequentially arranged along the radial direction of the mold, a sealing member is arranged between every two adjacent sub sealing plates, a fourth sealing member 34 is arranged between the outer circumference of the outermost sub sealing plate and the inner circumference of the first sealing plate 61, and a fifth sealing member 35 is arranged between the inner circumference of the innermost sub sealing plate and the recess 5. By arranging a plurality of mutually sleeved sub-sealing plates, the sealing stroke of the second sealing plate 62 is further increased, so that the vacuumizing stroke before the die assembly of the die is completed can be more effectively increased.
Specifically, the supporting structure is arranged between each sub-sealing plate and the upper sidewall mold, two adjacent sub-sealing plates can axially displace, and the sealing stroke L1 of the second sealing plate 62 is the superposition of the sealing strokes of all the sub-sealing plates; the sum of the sealing stroke L1 of the second sealing plate 62 and the sealing stroke L2 of the first sealing plate 61 is less than or equal to the sealing stroke L3 of the sealing ring 4, namely L1+ L2 is less than or equal to L3, and preferably L1+ L2= L3- (5 to 8) mm.
Taking the example where the second seal plate 62 includes two sub seal plates, the sealing stroke L1 of the second seal plate 62 is the sum of the sealing strokes of the two sub seal plates. When a sealed cavity is initially formed in the mold closing process, the sealing stroke a1 of the inner sub-sealing plate is the axial distance from the bottom surface of the inner sub-sealing plate to the bottom surface of the recessed portion 5, and the sealing stroke a2 of the outer sub-sealing plate is the axial distance from the sealing member between the two sub-sealing plates to the fifth sealing member 35, that is, L1= a1+ a2; the sealing stroke L2 of the first seal plate 61 is the axial distance of the fourth seal 34 from the seal located between the two sub seal plates; the sealing stroke L3 of the sealing ring 4 is the axial distance from the bottom surface of the guide ring 1 to the upper end surface of the lower tire side mold.
Wherein L3 is more than or equal to 20mm. In some preferred embodiments, L1 is 8 to 20mm, L2 is 8 to 20mm, and L3 is 20 to 30mm. Of course, the values of L1, L2, and L3 are not limited to the above specific limitations, and may be set reasonably according to actual situations.
Referring to fig. 2, in detail, the upper sidewall mold in the present embodiment includes an upper base plate 91 and an upper sidewall plate 92, the upper sidewall plate 92 is located below the upper base plate 91 and is fixedly connected to the upper base plate 91, and the recess 5 is formed outside an upper portion of the upper base plate 91.
The lower sidewall mold includes a lower substrate 93 and a lower sidewall plate 94, the lower sidewall plate 94 is located above the lower substrate 93 and is fixedly connected to the lower substrate 93, a sixth sealing member 36 is disposed between the lower substrate 93 and the lower sidewall plate 94, and a sealing ring 4 is formed on the outer periphery of the lower substrate 93. Wherein the sixth seal 36 may be disposed on the lower base plate 93 and also on the lower sidewall plate 94.
The six sealing elements in the above embodiment are respectively arranged in the corresponding six sealing grooves, the cross section of each sealing groove is in an inverted V shape or an inverted semi-circular shape, and the cross section of each sealing element is in any one of a trapezoid shape, a semi-circle shape and a triangle shape. As long as six sealing members are respectively matched with the shapes of the corresponding sealing grooves, the sealing members can be prevented from being separated from the sealing grooves. In the present embodiment, the first seal 31, the second seal 32, the third seal 33, the fourth seal 34, the fifth seal 35, and the sixth seal 36 are all seal rings.
The arrangement of the upper sidewall mold, the lower sidewall mold and the tread mold is only a preferred arrangement, and does not limit the scope of the present invention. In another possible embodiment, the upper sidewall mold, the lower sidewall mold, and the tread mold may be of an integral structure.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which will enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A vacuumizing adjustable die is characterized by comprising an upper tread die, a lower tread die, a plurality of tread dies and a guide ring (1), wherein the tread dies are sequentially arranged along the circumferential direction to form an annular shape and are provided with upper and lower openings, the upper tread die is positioned at the upper opening, the lower tread die is positioned at the lower opening, and the periphery of the tread dies is connected with the guide ring (1) in a sliding manner;
the upper end of the guide ring (1) is provided with a mounting ring (2), a first sealing element (31) is arranged between the mounting ring (2) and the guide ring (1), the periphery of the lower tire side die is provided with a sealing ring (4) protruding upwards, a second sealing element (32) is arranged between the inner periphery of the sealing ring (4) and the outer periphery of the guide ring (1), and the sealing ring (4) or the guide ring (1) is provided with a vacuumizing opening (41);
a support table (21) is formed on the inner periphery of the mounting ring (2), a concave part (5) is formed on the outer side of the upper portion of the upper tire side mold, a first sealing plate (61) is arranged on the support table (21), a third sealing element (33) is arranged between the outer periphery of the first sealing plate (61) and the support table (21), and the first sealing plate (61) is supported on the support table (21) and is located above the concave part (5);
the sunken part (5) is provided with a second sealing plate (62), a supporting structure is arranged between the second sealing plate (62) and the upper sidewall mold, the supporting structure is used for providing upward abutting force for the second sealing plate (62), the second sealing plate (62) can axially displace under the abutting force of the supporting structure, a fourth sealing element (34) is arranged between the outer periphery of the second sealing plate (62) and the inner periphery of the first sealing plate (61), and a fifth sealing element (35) is arranged between the inner periphery of the second sealing plate (62) and the sunken part (5);
to increase the residual radial travel of the tread mold during initial formation of the seal cavity during mold closing.
2. The evacuated segmented mold according to claim 1, wherein the supporting structure is an elastic supporting structure, and the elastic supporting structure comprises a limiting member (71) and an elastic member (72) sleeved on the limiting member (71);
one of the second sealing plate (62) and the upper sidewall mold is provided with a counter bore (73), the limiting piece (71) at least partially penetrates through the other one of the second sealing plate (62) and the upper sidewall mold through the counter bore (73) and is in limiting fit with the other one of the second sealing plate (62) and the upper sidewall mold, and the elastic piece (72) is supported between the second sealing plate (62) and the upper sidewall mold.
3. The vacuum extraction segmented mold according to claim 2, wherein the limiting member (71) is a limiting screw, the counter bore (73) is formed in the second sealing plate (62), the upper sidewall mold is provided with a mounting hole (74) corresponding to the counter bore (73), an upper portion of the mounting hole (74) is formed as a sunken table, a lower portion of the mounting hole (74) is formed as a threaded hole, the limiting member (71) downwardly penetrates through the second sealing plate (62) from the counter bore (73) and is in threaded engagement with the threaded hole, and the limiting member (71) is supported between the sunken table and the second sealing plate (62).
4. The vacuum-pumping segmented mold according to claim 3, characterized in that a sealing plug (75) is arranged in the counterbore (73), the sealing plug (75) is positioned at the top of the limit screw, and the periphery of the sealing plug (75) is in sealing fit with the inner wall of the counterbore (73).
5. The vacuum-pumping segmented mold according to claim 2, wherein the limiting member (71) is a limiting screw, the counter bore (73) is formed in the upper sidewall mold, the second sealing plate (62) is provided with a mounting hole (74) corresponding to the counter bore (73), the lower portion of the mounting hole (74) is formed as a sunken platform, the upper portion of the mounting hole (74) is formed as a threaded hole, the limiting member (71) at least partially penetrates through the upper sidewall mold upwards from the counter bore (73) and is in threaded fit with the threaded hole, and the limiting member (71) is supported between the upper sidewall mold and the sunken platform.
6. The evacuated segmented mold according to any one of claims 1 to 5, characterized in that the sum of the sealing stroke L1 of the second sealing plate (62) and the sealing stroke L2 of the first sealing plate (61) is less than or equal to the sealing stroke L3 of the sealing ring (4);
the sealing structure comprises a support structure, a concave portion (5) and a guide ring (1), wherein the support structure is arranged in the support structure, the concave portion is arranged in the support structure, the inner periphery of the second sealing plate (62) is in sealing fit with the outer periphery of the concave portion (5), the second sealing plate (62) can generate maximum axial displacement under the action of abutting force of the support structure, the inner periphery of the first sealing plate (61) is in sealing fit with the outer periphery of the second sealing plate (62), the first sealing plate (61) can generate maximum axial displacement relative to the second sealing plate (62), and the bottom surface of the guide ring (1) is away from the axial distance of the upper end surface of the lower tire side mold when a sealing cavity is initially formed in the mold closing process.
7. The vacuumized adjustable mold according to claim 6, wherein L1 is 8 to 20mm, L2 is 8 to 20mm, and L3 is 20 to 30mm.
8. The vacuum-pumping segmented mold according to claim 6, characterized in that the tread mold comprises an arched seat (81) and a pattern block (82), wherein the pattern block (82) is fixed on the inner side of the arched seat (81), and the outer periphery of the arched seat (81) is slidably connected with the inner periphery of the guide ring (1) through conical surface fitting;
the surface of the pattern block (82) is provided with a pattern rib, the height of the pattern rib is h, the inclination angle of the inner conical surface of the guide ring (1) relative to the axial direction is theta, and L1 and L2 meet the following conditions: (L1 + L2). Times.tan. Theta. > h.
9. An evacuated segmented mold according to any claim 1 to 5, characterized in that the upper sidewall mold comprises an upper base plate (91) and an upper sidewall plate (92), the upper sidewall plate (92) is positioned below the upper base plate (91) and fixedly connected with the upper base plate (91), and the recess (5) is formed at the upper outer side of the upper base plate (91).
10. The evacuated segmented mold according to any one of claims 1 to 5, characterized in that the lower sidewall mold comprises a lower base plate (93) and a lower sidewall plate (94), the lower sidewall plate (94) is positioned above the lower base plate (93) and is fixedly connected with the lower base plate (93), a sixth sealing member (36) is arranged between the lower base plate (93) and the lower sidewall plate (94), and the sealing ring (4) is formed on the periphery of the lower base plate (93).
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| CN202211186739.7A CN115257034B (en) | 2022-09-28 | 2022-09-28 | Vacuum-pumping segmented mold |
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| CN202211186739.7A CN115257034B (en) | 2022-09-28 | 2022-09-28 | Vacuum-pumping segmented mold |
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| CN115257034B true CN115257034B (en) | 2023-01-31 |
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| CN117227231B (en) * | 2023-11-10 | 2024-03-22 | 山东豪迈机械科技股份有限公司 | Vacuumizing mold |
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| CN115257034A (en) | 2022-11-01 |
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