CN106346649A - Vacuum type tire segment mold - Google Patents

Abstract

The invention discloses a vacuum tire flexible mold, which comprises an outer tire cavity and an inner tire forming member; the outer tire cavity is used for shaping and vulcanizing the outer surface of the tire; the inner tire forming member is used for shaping the inner surface of the tire. The upper part of the mold is provided with an upper sealing ring, which is used to realize and maintain the vacuum state of the mold; the upper sealing ring includes a ring body, and the outer side of the ring body is provided with an annular outer boss. The present invention adopts the above technical scheme, and compared with the prior art, it has the following advantages: the upper sealing ring can be added on the upper part of the existing mold, and the vacuum function of the existing mold can be increased; there is no need to redesign and process The new structure of the vacuum mold greatly reduces the design and processing cost of the vacuum mold, and can reduce the processing cost of the vacuum mold by about 50%.

Description

Vacuum tire flexible mold

technical field

The invention relates to a tire mold, which is suitable for moving tires for passenger tires, light truck tires, engineering tires, and giant tires. Specifically, it relates to a vacuum-type tire moving mold, which belongs to the technical field of tire molds.

Background technique

The tire active mold is the necessary equipment for tire vulcanization molding. At present, the tire vulcanization process is summarized as follows: place the green tire in a mold heated to about 180°C, press the green tire to the sidewall and pattern block by inflating the forming bladder, and the gas between the green tire and the inner wall of the mold cavity Extruded by the tire blank, it is passively discharged from the vent holes of the sidewall and pattern block, so that the tire blank can fill the mold cavity, and the tire blank starts to vulcanize until the vulcanization is completed.

During the vulcanization process of the tire, the gas between the tire blank and the mold cavity must be discharged in time. If it cannot be discharged in time, the gas will remain in the dead corners such as the pattern, which will lead to rubber shortage in the dead corners after the tire vulcanization is completed, and the tire will be scrapped. In order to discharge the gas smoothly, during the mold processing, a large number of vent holes will be processed on the cavity surface according to the tire exhaust requirements, and the gas between the tire blank and the mold tread will be discharged through the vent holes. However, in this exhaust method, the gas is discharged through the extrusion of the molded capsule, but sometimes due to the unreasonable design of the position of the tread air hole, the air hole is blocked by the rubber material and the air hole is not cleared in time, and the outline shape of the tire is unreasonable. Wait, the traditional exhaust method will easily cause the gas to remain in the pattern or other dead corners. After the tire is vulcanized, there will still be rubber shortage defects and become waste products. At the same time, a large number of air holes are processed on the tire cavity, and the rubber material of the tire blank will also be squeezed into the air vent holes. After demolding, a large number of rubber strips will be left on the tire surface, which will greatly affect the appearance quality of the tire and cause waste of rubber material. . In order to improve the appearance quality of the tire, it is necessary to manually trim the rubber strip, which also increases the production cost of the tire.

Existing molds that provide vacuuming mainly process sealing grooves and place sealing rings inside the mold structure and on the connection surfaces between mold structural parts that may be ventilated to the outside. This method of vacuuming the mold often requires a completely designed and processed mold with a new structure. Not only does it need to recalculate the size of the joint surface where the mold leaks, but it also needs to consider the connection relationship between each structural part and the machining accuracy of each joint surface. The requirements are very high, resulting in very high design and processing costs.

Especially for the sealing device on the upper part of the mold, because the main power of the opening and closing action of the mold comes from the vulcanizer, the sealing of its connection position has always been difficult to solve, and it is often necessary to redesign the mold structure and remanufacture the mold.

Contents of the invention

The technical problem to be solved by the present invention is to provide a vacuum-type tire active mould, which has the advantages of timely exhaust, good vacuum effect, wide applicability, low processing accuracy, low cost and long service life in view of the shortcomings of the existing technology. , The advantages of good product quality.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a vacuum tire flexible mold, including an outer tire cavity and an inner tire forming member;

The outer tire cavity is used to shape and vulcanize the outer side of the tire;

The inner tire building member is used to shape the inner side of the tire.

The following is a further improved technical solution:

The upper part of the mold is provided with an upper sealing ring for realizing and maintaining the vacuum state of the mould;

The upper sealing ring includes a ring body, and the outer side of the ring body is provided with an annular outer boss.

The mold also includes an upper sealing device;

The upper sealing device includes an upper sealing ring and a second sealing ring;

A light hole is arranged on the upper sealing ring, and the second sealing ring is arranged around the light hole.

The mold also includes a middle mold casing, the middle mold casing is connected with an upper sealing ring, and a first sealing ring is provided between the upper sealing ring and the outer side of the middle mold casing.

An upper cover is connected below the upper sealing ring; a third sealing ring is provided between the contact surface of the upper sealing ring and the upper cover.

The second sealing ring is arranged on both sides of the light hole;

or,

The second sealing ring is arranged outside the outermost light hole and inside the innermost light hole, and the number is two rings.

The second sealing ring is arranged in the sealing groove provided on the upper sealing ring;

or,

A mounting ring is connected below the upper sealing ring, and the second sealing ring is arranged in a sealing groove provided on the mounting ring.

The first sealing ring is arranged in the sealing groove provided on the upper sealing ring, or the first sealing ring is arranged in the sealing groove provided on the middle die sleeve.

The third sealing ring is arranged in the sealing groove opened on the upper sealing ring, or the third sealing ring is arranged in the sealing groove opened on the upper cover.

The mold also includes a lower sealing device;

The lower sealing device includes a lower sealing boss, and the lower sealing boss is connected with a middle mold cover. After the mold is closed, the lower part of the middle mold cover cooperates with the lower sealing boss, and a fourth sealing ring is arranged at the matching place;

The mold also includes a base and a lower side plate;

A fifth sealing ring is provided between the connecting surface of the base and the lower side plate.

the mold includes a mounting ring;

There are pin holes on the mounting ring;

The outer periphery of each pin hole is provided with a sealing groove, and the sealing groove is located on the outer periphery of the pin hole;

or,

The inner side and the outer side of the pin hole are respectively provided with sealing grooves.

The upper sealing ring is integrally connected with a mounting ring.

The inside of the upper sealing ring is provided with an inner boss, and a sixth sealing ring is arranged between the inner boss and the central lifting device of the vulcanizer;

An upper cover is connected below the upper sealing ring; a seventh sealing ring is arranged outside the fixing bolts connecting the upper cover and the central lifting device of the vulcanizing machine.

The sixth sealing ring is set in the sealing groove on the inner boss, or the sixth sealing ring is set in the sealing groove of the central lifting device of the vulcanizer;

The seventh sealing ring is arranged in the sealing groove of the upper cover,

or,

The seventh sealing ring is arranged in the sealing groove of the central lifting device of the vulcanizing machine.

The outer tire cavity includes an upper side plate, a lower side plate and several tread blocks that can run radially;

An upper cover is fixedly connected above the upper side plate, and a lower sealing ring is fixedly connected below the lower side plate, and the pattern blocks are located outside the upper side plate and the lower side plate;

The inner tire forming member is an inner tire forming bladder, and the inner tire forming bladder is used to shape the inner surface of the tire through inflation and expansion.

The mold includes a pattern block driving device, which is used to drive the pattern block to move radially;

The pattern block driving device includes a bow seat, a guide bar, an upper slider, a middle die sleeve and a mounting ring;

The pattern block is fixedly connected with the bow-shaped seat by locking screws. The bow-shaped seat forms a guideable inclined surface with the middle mold sleeve through the guide bar. The upper part of the bow-shaped seat is connected with an upper slider. slide in the slot.

The mounting ring and the middle die sleeve are integrally structured.

The present invention adopts the above technical scheme, and compared with the prior art, has the following advantages:

1. The upper sealing ring can be added on the upper part of the existing mold, which can realize the increase of the vacuum function of the existing mold; there is no need to redesign and process the vacuum mold with a new structure, which greatly reduces the design of the vacuum mold The processing cost can reduce the processing cost of the vacuum mold by about 50%;

2. It is only necessary to ensure the accuracy of the mating surface between the upper sealing ring and the middle mold sleeve, the connecting surface between the upper sealing ring and the upper surface of the mounting ring, and the connecting surface between the upper sealing ring and the upper cover to meet the sealing requirements. The processing difficulty of these three surfaces is far less than the processing difficulty of the connecting surface between the upper cover, the mounting ring and the middle die sleeve where the sealing device is installed. It can better ensure the sealing of the mold, and at the same time reduce the processing cost, which can reduce the processing cost by about 10%;

3. The device of this patent can reduce the processing accuracy requirements of the upper cover, the installation ring and other mechanisms inside the mold, and reduce the processing cost;

4. Reduce the cost of sealing rings by using small-sized sealing rings around the screw holes;

5. The end face static seal is used between the upper sealing ring and the installation ring to improve the service life of the sealing ring. The service life is at least one year, which is about 5 times the service life of the dynamic seal;

6. The thickness of the upper sealing ring is relatively thin, and the material cost is low;

7. Wide adaptability, low requirements for flexible mold structure, and can be used for molds with various shapes and types of mounting rings;

8. There is no need for a vent hole structure, and the process of vent hole processing and inserting can be eliminated, reducing cost and processing difficulty;

9. Each component can be processed with existing processing technology, and the difficulty is relatively low;

10. The exhaust is timely, the vacuum effect is good, and the vacuum degree can reach a negative atmospheric pressure;

11. The tires produced by this mold are of good quality, without glue strips or lack of glue.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Accompanying drawing 1 is the structural representation of tire flexible mold in the embodiment of the present invention 1;

Accompanying drawing 2 is the structural representation of upper seal ring in the embodiment 1 of the present invention;

Accompanying drawing 3 is the structural representation of mounting ring in the embodiment 1 of the present invention;

Accompanying drawing 4 is the P-direction structure schematic diagram of upper sealing ring in the embodiment 1 of the present invention;

Accompanying drawing 5 is the Q direction structure schematic diagram of the installation ring in the embodiment 1 of the present invention;

Accompanying drawing 6 is the structural representation of mounting ring in the embodiment 2 of the present invention;

Accompanying drawing 7 is the structural representation of tire active mold in the embodiment of the present invention 3;

Accompanying drawing 8 is the structural representation of tire active mold in the embodiment of the present invention 4;

In the figure,

1-base, 2-outer tire cavity, 21-upper side plate, 22-lower side plate, 23-pattern block, 3-inner tire molding capsule, 4-upper cover, 5-pattern block driving device, 51-bow Seat, 53-upper slider, 54-middle mold sleeve, 55-installation ring, 551-pin hole, 552-sealing groove, 6-sealing device, 61-upper sealing device, 611-upper sealing ring, 611A-outside protrusion Platform, 611B-ring body, 611C-light hole, 611D-inner boss, 612-sealing component, 612A-first sealing ring, 612B-second sealing ring, 612C-third sealing ring, 612D-sixth sealing ring , 612E-seventh sealing ring, 62-lower sealing device, 621-lower sealing boss, 622-fourth sealing ring, 623-fifth sealing ring, 7-vulcanizing machine center lifting mechanism, 8-limit pin.

detailed description

Embodiment 1, as shown in Fig. 1-Fig. 5, the vacuum type tire active mold is made up of base 1, outer tire cavity 2, inner tire molding capsule 3, upper cover 4 and pattern block driving device 5.

The outer tire cavity 2 is used to shape and vulcanize the outer side of the tire, and includes an upper side plate 21 , a lower side plate 22 and several radially movable pattern blocks 23 . The upper side plate 21 is fixed below the upper cover 4 , the lower side plate 22 is fixed above the lower sealing ring 621 , and the pattern blocks 23 are located outside the upper side plate 21 and the lower side plate 22 .

The inner tire building bladder 3 is used for shaping the inner surface of the tire by inflation.

The pattern block driving device 5 is used to drive the pattern block 23 to move radially, and includes an arcuate seat 51 , a guide bar, an upper slider 53 , a middle die sleeve 54 and a mounting ring 55 . The pattern block 23 is fixedly connected with the bow seat 51 by locking screws. The bow seat 51 forms a guideable inclined surface with the middle mold cover 54 through the guide bar. The upper part of the bow seat 51 is connected with an upper slider 53. The upper slider 53 Can slide in the chute of loam cake 4.

The upper part of the middle die sleeve 54 is connected with the mounting ring 55 .

The mounting ring 55 is provided with pin holes 551 , and each pin hole 551 is provided with a sealing groove 552 on the outer periphery thereof, and the sealing groove 552 is located on the outer periphery of the pin hole 551 .

In addition to the above structure, the mold is also provided with a sealing device 6 . The sealing device 6 includes an upper sealing device 61 and a lower sealing device 62;

The upper sealing device 61 includes: an upper sealing ring 611 and a sealing member 612 .

The upper sealing ring 611 covers the upper cover 4 and the mounting ring 55 . The upper sealing ring 611 is fixedly connected with the hot plate mechanism of the vulcanizer. Generally, bolts are provided on the hot plate of the vulcanizer in this connection mode, and the bolts pass through the light hole 611C of the upper sealing ring 611 and are fixedly connected with the mounting ring 55 . The bolts are arranged in groups on the mounting ring 55, the number of each group of bolts is greater than or equal to 3, and the plurality of bolts in each group are evenly distributed on the mounting ring 55, the number of groups of the bolts is greater than or equal to 1 group, preferably 1 group or 2 Group.

The upper sealing ring 611 includes a ring body 611B. An annular outer boss 611A is provided on the outer side of the ring body 611B. The outer boss 611A cooperates with the middle mold casing 54 , and a first sealing ring 612A is arranged on the outer side of the middle mold casing 54 .

The sealing component 612 includes a second sealing ring 612B provided on the outer periphery of the light hole of the upper sealing ring, and a third sealing ring 613C provided between the contact surface of the upper sealing ring 611 and the upper cover 4 .

The second sealing ring 612B can also be arranged on both sides of the light hole 611C, and the number is two. For a mold with multiple sets of bolts, the second sealing ring 612B is arranged on the outer side of the outermost light hole group and the innermost light hole group of the multiple sets of light holes corresponding to the multiple sets of bolts, and the number is also two rings.

The second sealing ring 612B can be set in the sealing groove opened on the upper sealing ring 611 , and can also be set in the sealing groove 552 opened on the mounting ring 55 .

Similarly, the third sealing ring 612C can be set in the sealing groove opened on the upper sealing ring 611 , or can be set in the sealing groove opened on the upper cover 4 .

Similarly, the first sealing ring 612A can be arranged in the sealing groove provided on the upper sealing ring 611 , or can be arranged in the sealing groove provided on the middle mold casing 54 .

The lower sealing device 62 is used to realize the sealing of other positions of the mold, especially the lower part.

The lower sealing device 62 can be that the base 1 is provided with a lower sealing boss 621, and after the lower sealing boss 621 and the middle mold cover 54 are mold-closed, the lower part of the middle mold cover 54 cooperates, and a fourth sealing ring 622 is designed at the mating place. At the same time, a fifth sealing ring 623 is provided between the connecting surface of the base 1 and the lower side plate 22 .

Embodiment 2, as shown in FIG. 6 , is a vacuum-type tire active mould. A pin hole 551 is provided on the mounting ring 55 , and sealing grooves 552 are respectively provided on the inner side and the outer side of the pin hole 551 . The rest of the structure is the same as that of Embodiment 1, and will not be repeated in this embodiment.

Embodiment 3, as shown in FIG. 7 , the vacuum tire flexible mould, the mounting ring 55 and the upper sealing ring 611 can adopt an integral structure design, thereby reducing the number of sealing rings used. The rest of the structure is the same as that of Embodiment 1, and will not be repeated in this embodiment.

Embodiment 4, as shown in FIG. 8 , is a vacuum tire active mold. An inner boss 611D is provided inside the upper sealing ring 611 , and a sixth sealing ring 612D is arranged between the inner boss 611D and the central lifting device 7 of the vulcanizing machine. At the same time, a seventh sealing ring 612E is provided on the outer side of the connecting and fixing bolts between the upper cover 4 and the central lifting device 7 of the vulcanizing machine.

The sixth sealing ring 612D can be set in the sealing groove on the inner boss 611D, or can be set in the sealing groove of the central lifting device 7 of the vulcanizer.

The seventh sealing ring 612E can be set in the sealing groove of the upper cover 4 , or in the sealing groove of the central lifting device 7 of the vulcanizer.

Embodiment 5, the vacuum type tire active mould, the mounting ring 55 and the middle mold casing 54 adopt an integral structure design, and the outer side of the middle mold casing 54 does not need to be provided with a sealing ring. The rest of the structure is the same as that of Embodiment 1, and will not be repeated in this embodiment.

Based on the description of the above-mentioned embodiments, when the operation of the present invention, use and the effect produced by the present invention can be fully understood, the above is an example of the best implementation mode of the present invention, and can not limit the scope of the implementation of the present invention with this. The scope of protection is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention is also within the scope of protection of the present invention.

Claims (17)

1. vacuum type tyre adjustable die it is characterised in that: described mould includes outside tire die cavity (2), inside tire molding Component；

Outside tire die cavity (2) is used for tire lateral surface being shaped and vulcanizing；

Inside tire shaped component is used for the medial surface of tire is shaped.

2. vacuum type tyre adjustable die as claimed in claim 1 it is characterised in that: the top of described mould is provided with sealing Ring (611), for realizing and keeping the vacuum state of mould；

Described upper sealing ring (611) includes ring body (611b), and the outside of ring body (611b) is provided with annular outboard boss (611a).

3. vacuum type tyre adjustable die as claimed in claim 1 it is characterised in that: described mould also includes upper sealing device (61)；

Described upper sealing device (61) includes upper sealing ring (611) and the second sealing ring (612b)；

Described upper sealing ring (611) is provided with unthreaded hole (611c), and the second sealing ring (612b) is arranged on unthreaded hole (611c) around.

4. vacuum type tyre adjustable die as claimed in claim 1 it is characterised in that: described mould also includes middle die sleeve (54), middle die sleeve (54) is connected with upper sealing ring (611), is provided between the outside of upper sealing ring (611) and middle die sleeve (54) One sealing ring (612a).

5. vacuum type tyre adjustable die as claimed in claim 2 it is characterised in that: connect below described upper sealing ring (611) It is connected to lid (4)；The 3rd sealing ring (612c) being provided between upper sealing ring (611) and upper lid (4) contact surface.

6. vacuum type tyre adjustable die as claimed in claim 3 it is characterised in that: the setting of described second sealing ring (612b) In unthreaded hole (611c) both sides；

Or,

Second sealing ring (612b) is arranged on the outside of outermost unthreaded hole (611c), and the unthreaded hole (611c) of innermost layer is interior Side, quantity is two circles.

7. vacuum type tyre adjustable die as claimed in claim 3 it is characterised in that: the setting of described second sealing ring (612b) In the seal groove opening up on upper sealing ring (611)；

Or,

It is connected with mounting ring (55), the second sealing ring (612b) is arranged on and opens up in mounting ring (55) below upper sealing ring (611) Seal groove (552) in.

8. vacuum type tyre adjustable die as claimed in claim 4 it is characterised in that: the setting of described first sealing ring (612a) In the seal groove opening up on upper sealing ring (611), or, the first sealing ring (612a) is arranged on open up on middle die sleeve (54) close In sealing groove.

9. vacuum type tyre adjustable die as claimed in claim 5 it is characterised in that: described 3rd sealing ring (612c) setting In the seal groove opening up on upper sealing ring (611), or, the 3rd sealing ring (612c) is arranged on the sealing open up on lid (4) In groove.

10. vacuum type tyre adjustable die as claimed in claim 1 it is characterised in that: described mould also include lower sealing dress Put (62)；

Lower sealing device (62) includes lower seal boss (621), lower seal boss (621) be connected with middle die sleeve (54) matched moulds it Afterwards, middle die sleeve (54) bottom and lower seal boss (621) cooperation, are provided with the 4th sealing ring (622) at cooperation；

Described mould also includes base (1) and lower side panel (22)；

It is provided with the 5th sealing ring (623) between base (1) and lower side panel (22) joint face.

11. vacuum type tyre adjustable dies as claimed in claim 1 it is characterised in that: described mould includes mounting ring (55)；

Mounting ring (55) is provided with pin-and-hole (551)；

The periphery of each pin-and-hole (551) is provided with a seal groove (552), and seal groove (552) is located at the periphery of pin-and-hole (551)；

Or,

The inner side and outer side of pin-and-hole (551) is respectively equipped with seal groove (552).

12. vacuum type tyre adjustable dies as claimed in claim 2 it is characterised in that: described upper sealing ring (611) integrally connects It is connected to mounting ring (55).

13. vacuum type tyre adjustable dies as claimed in claim 2 it is characterised in that: set inside described upper sealing ring (611) There is inner side boss (611d), between inner side boss (611d) and vulcanizer center hoisting gear, be provided with the 6th sealing ring (612d)；

It is connected with lid (4) below upper sealing ring (611)；Upper lid (4) and the bolt that is connected of vulcanizer center hoisting gear Outside is provided with the 7th sealing ring (612e).

14. vacuum type tyre adjustable dies as claimed in claim 15 it is characterised in that: described 6th sealing ring (612d) sets Put in the seal groove on inner side boss (611d), or, the 6th sealing ring (612d) is arranged on vulcanizer center hoisting gear In seal groove；

7th sealing ring (612e) is arranged in the seal groove of lid (4), or, the 7th sealing ring (612e) is arranged in vulcanizer In the seal groove of heart lowering or hoisting gear.

15. vacuum type tyre adjustable dies as claimed in claim 1 it is characterised in that: described outside tire die cavity (2) includes Epipleural (21), lower side panel (22) and some pattern blocks (23) that can radially run；

It is fixedly connected with lid (4) above epipleural (21), below lower side panel (22), be fixedly connected with lower sealing ring (621), flower Stricture of vagina block (23) is located at outside epipleural (21) and lower side panel (22)；

Described inside tire shaped component is inside tire moulding capsules (3), and inside tire moulding capsules (3) pass through inflation It is used for the medial surface of tire is shaped.

16. vacuum type tyre adjustable dies as claimed in claim 15 it is characterised in that: described mould include pattern block drive Device (5), for driving pattern block (23) to move radially；

Described pattern block driving means (5) include arcuate seat (51), gib block (52), top shoe (53), middle die sleeve (54) and peace Dress ring (55)；

Pattern block (23) is fixedly connected with arcuate seat (51) by tightly locking screw, and arcuate seat (51) passes through gib block (52) and middle die sleeve (54) formed can guiding surface, arcuate seat (51) top is connected with top shoe (53), and top shoe (53) is during mould open/close Can slide in the chute of Shang Gai (4).

17. vacuum type tyre adjustable dies as claimed in claim 16 it is characterised in that: described mounting ring (55) and middle die sleeve (54) it is structure as a whole.