A tire flexible mold

Abstract

The present invention relates to the technical field of tire processing, and discloses a tire flexible mold. The tire flexible mold comprises a base, an upper cover, a plurality of sliders arranged between the base and the upper cover along the circumferential direction, and a guide ring sleeved on the outer peripheral side of the plurality of sliders. Rolling bodies are arranged between the guide ring and the slider, and / or between the slider and the upper cover, so the friction mode between the guide ring and the slider, and / or between the slider and the upper cover is rolling friction. Compared with the sliding friction adopted in the current technology, the friction coefficient can be reduced by 70%, which reduces wear and improves the mold precision. And compared with the flexible mold of the current technology, it does not need to frequently replace the wear-resistant plate, so the efficiency of tire vulcanization is also improved. With the reduction of friction, the opening and closing of the mold becomes smooth, the noise is reduced, and the probability of mold sticking can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tire production, in particular to a tire flexible mold. Background Art

[0002] The radial tire active mold is used to produce radial tires. It is the most personalized "dynamic" mold in the mold family. During the vulcanization process of the tire, it needs to perform tens of thousands of opening and closing movements in a high temperature (about 145-185℃), high pressure (about 2.5-3.0MPA), and corrosive environment, and must withstand a clamping force of tens to thousands of tons. In order to ensure the lubrication of the opening and closing movement, the existing active molds are equipped with wear-resistant plates between the relatively moving parts. There is sliding friction between the moving parts and the wear-resistant plates, but this method has a large friction coefficient and the wear-resistant plates wear quickly, resulting in changes in the gaps between the parts, reduced mold accuracy, and the need to frequently replace the wear-resistant plates, affecting the tire vulcanization efficiency. In addition, due to the large friction coefficient of sliding friction, the noise of opening and closing the mold is large, and it is easy to cause mold sticking, that is, when the tire vulcanization is completed, the mold cannot be opened. Summary of the invention

[0003] The purpose of the present invention includes providing a tire flexible mold to improve the problems of the current flexible mold that the opening and closing of the mold is not smooth, the mold is easy to stick, the noise is large, and the mold is easy to wear, resulting in reduced mold accuracy and reduced tire vulcanization efficiency.

[0004] The embodiment of the present invention is achieved as follows:

[0005] A tire flexible mold, comprising:

[0006] Base;

[0007] An upper cover spaced apart from the base;

[0008] A plurality of sliders are arranged between the base and the upper cover, the sliders are arranged along the circumferential direction between the base and the upper cover, and the base, the upper cover and the sliders together form a vulcanization cavity for accommodating the tire; the sliders can move radially relative to the upper cover and the base;

[0009] A guide ring is sleeved on the outer side of the plurality of sliders, the guide ring is movably connected to the sliders, and a matching surface is provided between the guide ring and the sliders that is inclined relative to the axis of the guide ring; the guide ring is configured to drive the sliders to move radially outward when the guide ring moves away from the base in the direction of its own axis;

[0010] Among them, one of the guide ring and the slider is provided with a first rolling body to achieve rolling friction between the guide ring and the slider, and / or a second rolling body is provided between the upper cover and the slider to achieve rolling friction between the upper cover and the slider.

[0011] In one embodiment of the present invention, one of the guide ring or the slider is provided with a sliding portion, and the other of the guide ring or the slider is provided with a sliding groove, and the sliding portion is embedded in the sliding groove and is slidingly connected to the sliding groove through a first rolling body.

[0012] In one embodiment of the present invention, the inner side surface of the guide ring is a conical surface, the sliding portion is arranged on the inner side surface of the guide ring, the slide groove is arranged on the outer side of the slider, the sliding portion includes a guide bar connected to the inner side surface of the guide ring and a mounting bar connected to the guide bar, the mounting bar is wider than the guide bar so that the cross-section of the sliding portion is T-shaped, the slide groove is a T-shaped groove, and a plurality of first rolling bodies are arranged on the side of the mounting bar facing the guide ring.

[0013] In an embodiment of the present invention, a plurality of first rolling bodies are divided into two rows and arranged on the mounting strip, and the two rows of first rolling bodies are respectively located on both sides of the guide strip.

[0014] In one embodiment of the present invention, the first rolling element is one of a roller, a ball or a needle.

[0015] In one embodiment of the present invention, the first rolling element is rotatably connected to the mounting bar via a bearing.

[0016] In one embodiment of the present invention, a limit block is provided on the guide ring, and the sliding block is provided with an abutting surface for abutting the limit block.

[0017] In an embodiment of the present invention, a third rolling body is further arranged between the guide ring and the sliding block, and the third rolling body is located outside the sliding groove.

[0018] In an embodiment of the present invention, a plurality of third rolling bodies are arranged in two rows on both sides of the slide groove.

[0019] In an embodiment of the present invention, a fourth rolling body is provided between the slider and the base, and the slider and the base are slidably connected via the fourth rolling body.

[0020] The beneficial effects of the embodiments of the present invention are:

[0021] The tire active mold provided by the embodiment of the present invention comprises a base, an upper cover, a plurality of sliders arranged between the base and the upper cover along the circumferential direction, and a guide ring sleeved on the outer peripheral side of the plurality of sliders. The slider is slidably connected to the base and the upper cover respectively so that the slider can move radially relative to the upper cover. The guide ring is movably connected to the slider, and the mating surfaces of the two are inclined relative to the axis of the guide ring, so that when the guide ring moves away from the base in the direction of its own axis, it can drive the slider to move radially outward. Among them, a rolling body is arranged between the guide ring and the slider, or / and between the slider and the upper cover, so the friction mode between the guide ring and the slider, or / and between the slider and the upper cover is rolling friction, and the friction coefficient can be reduced by more than 70% compared with the sliding friction used in the current technology, reducing wear and thus improving the mold precision. And compared with the active mold of the current technology, it does not need to frequently replace the wear-resistant plate, so the processing efficiency is also improved. With the reduction of friction, the opening and closing of the mold becomes smooth, the noise is also reduced, and the probability of mold sticking can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a cross-sectional view of the tire active mold in the mold closing state according to the embodiment of the present invention;

[0024] Figure 2 It is a cross-sectional view of the tire flexible mold in the mold opening state according to an embodiment of the present invention.

[0025] Figure 3 for Figure 1 Sectional view in the AA direction;

[0026] Figure 4 A cross-sectional view of a tire flexible mold in another embodiment of the present invention;

[0027] Figure 5 for Figure 4 A cross-sectional view along the middle line A'-A';

[0028] Figure 6 for Figure 1 The cross-sectional view along the BB direction;

[0029] Figure 7 for Figure 2 Cross-sectional view along CC direction.

[0030] Icons: 010-tire active mold; 100-upper cover; 110-second rolling element; 200-base; 300-slider; 310-slide groove; 311-sliding surface; 312-contact surface; 313-yield groove; 320-fourth rolling element; 400-guide ring; 410-sliding part; 411-guide strip; 412-mounting strip; 413-first rolling element; 420-limiting part; 430-third rolling element; 440-mounting part. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invented product is usually placed when in use, which is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Figure 1 It is a cross-sectional view of the tire active mold 010 in the mold closing state according to the embodiment of the present invention; Figure 2 This is a cross-sectional view of the tire active mold 010 in the mold opening state according to the embodiment of the present invention. Figure 1 and Figure 2 The present embodiment provides a tire active mold 010, which includes an upper cover 100, a base 200, and a plurality of sliders 300 ( Figure 1 , Figure 2 Only one is shown in each figure) and a guide ring 400 sleeved on the outer circumference of multiple sliders 300. The slider 300 is frictionally matched with the guide ring 400, the upper cover 100, and the base 200 respectively. Since the matching surface between the slider 300 and the guide ring 400 is inclined to the axis of the guide ring 400, the slider 300 can slide relative to the base 200 and the upper cover 100 in the radial direction under the drive of the guide ring 400.

[0037] In this embodiment, the guide ring 400 is annular, the upper cover 100 and the base 200 are both roughly circular plates, and the axis of the guide ring 400 is perpendicular to the base 200 and the upper cover 100. The inner side surface of the guide ring 400 is a conical surface, so that the upper opening of the guide ring 400 is smaller than the lower opening. The outer side surface of each slider 300 is an inclined surface that matches the inner side surface of the guide ring 400, so that when the guide ring 400 moves downward, it can push the slider 300 to move radially inward.

[0038] In this embodiment, the inner side surface of the guide ring 400 is provided with a sliding part 410, and the outer side surface of the slider 300 is provided with a sliding groove 310 for cooperating with the sliding part 410. The opening of the sliding groove 310 is smaller than its internal space, so that when the guide ring 400 moves upward, it can drive the slider 300 to move radially outward, thereby realizing mold opening. A plurality of first rolling bodies 413 arranged along the extending direction of the sliding part 410 are provided on the sliding part 410, and the first rolling bodies 413 contact the inner wall of the sliding groove 310 to realize the sliding connection between the sliding part 410 and the slider 300. When the two move relative to each other, the friction mode is rolling friction, and the friction coefficient is low. It should be understood that in some other embodiments of the present invention, the sliding groove 310 can also be provided on the guide ring 400, the sliding part 410 is provided on the outside of the slider 300, and the first rolling body 413 can be provided on the slider 300 or the sliding part 410, as long as the rolling friction between the slider 300 and the guide ring 400 during relative movement can be realized.

[0039] Figure 3 for Figure 1 For the cross-sectional view in the AA direction, please refer to Figure 3 and Figure 1In this embodiment, the sliding part 410 includes a guide bar 411 and a mounting bar 412, wherein the guide bar 411 is mounted on the inner side of the guide ring 400 and extends along the friction direction of the inner side of the guide ring 400 relative to the slider 300 when the mold is opened and closed, that is, extends along a generatrix direction of the inner side of the guide ring 400. The mounting bar 412 is arranged on the side of the guide bar 411 away from the guide ring 400 and is fixed to the guide bar 411. The mounting bar 412 extends in the same direction as the guide bar 411 and is wider than the guide bar 411, so that the cross section of the entire sliding part 410 presents a T shape. The slide groove 310 matched with the sliding part 410 is a T-shaped groove, whose opening is smaller than the bottom, and the first rolling body 413 is arranged on the side of the mounting bar 412 facing the guide ring 400. The two side surfaces facing the bottom of the T-shaped groove are sliding surfaces 311, which are used to contact and cooperate with the first rolling body 413. In this embodiment, a plurality of first rolling bodies 413 are arranged in two rows, and the two rows of first rolling bodies 413 are located on both sides of the guide bar 411 in parallel and at intervals, and each row of first rolling bodies 413 is arranged along the length direction of the mounting bar 412. The first rolling body 413 is a roller in this embodiment, which can be rotatably arranged on the mounting bar 412 through a bearing, or embedded in a mounting groove on the mounting bar 412, and the cross-sectional profile of the mounting groove can be a major arc, so that the structure with an opening smaller than the interior can prevent the first rolling body 413 from falling out. In other embodiments of the present invention, the first rolling body 413 can also be in the form of a needle roller, a ball roller, etc.

[0040] The tire flexible mold 010 of this embodiment, when the mold is opened, the guide ring 400 moves upward (to Figure 1 , Figure 2 The first rolling body 413 is installed on the side of the installation strip 412 facing the guide ring 400, and the sliding surface 311 matched therewith is an inclined surface. Therefore, the guide ring 400 can pull the slider 300 to move outward during the movement, and the tire mold is opened to demold the tire. In this process, there is rolling friction between the guide ring 400 and the slider 300, with a small friction coefficient, less noise, and less wear. In the mold closing process, the guide ring 400 will squeeze the slider 300 to move inward. Therefore, it can be understood that a rolling body can also be set on the side of the guide ring 400 facing the slider 300, so that there is rolling friction between the two during the mold closing process.

[0041] Figure 4 A cross-sectional view of a tire flexible mold 010 in another embodiment of the present invention; Figure 5 for Figure 4 The cross-sectional view along A'-A'. Figure 4 and Figure 5In the embodiment, the slide groove 310 is located on the guide ring 400, and the sliding part 410 is located on the slider 300. In this embodiment, a strip-shaped mounting part 440 is fixedly arranged on both sides of the slide groove 310 of the guide ring 400, and the two mounting parts 440 are parallel and spaced apart, and the spacing distance W2 is smaller than the bottom width W1 of the slide groove 310. The interval between the two mounting parts 440 forms an opening of the slide groove 310, and the two mounting parts 440 and the guide ring 400 together form a slide groove 310 whose opening (width W2) is smaller than the bottom (width W1). Figure 3 The difference between the embodiments is that the first rolling body 413 is arranged on the wall surfaces facing the bottom of the groove on both sides of the opening of the slide groove 310, that is, the side of the mounting portion 440 facing the bottom of the slide groove 310; and the sliding surface 311 abutting against the first rolling body 413 is located on the sliding portion 410. Such a structure allows rolling friction between the guide ring 400 and the slider 300 when the mold is opened. In addition, outside the slide groove 310, a third rolling body 430 is also arranged on the inner side of the guide ring 400 facing the slider 300, so that rolling friction is still present between the guide ring 400 and the slider 300 when the mold is closed. Preferably, the third rolling body 430 is also a roller arranged in two rows, and the two rows of rollers are respectively located on both sides of the slide groove 310.

[0042] On the basis of the above embodiment, further, a limit block may be provided on the guide ring 400, and the slider 300 is provided with an abutting surface 312 for abutting against the limit block. Figure 1 and Figure 2 Taking the tire active mold 010 of the embodiment as an example, the limit block is fixed to the lower end of the sliding part 410 and protrudes into the tire active mold 010. The limit block can be fixed by fasteners such as bolts. In this embodiment, the bottom of the slide 310 has a clearance groove 313 for the limit part 420 to pass through. The end face of the upper end of the clearance groove 313 is the abutment surface 312, and the abutment surface 312 faces the limit part 420. During the mold opening process, the limit part 420 moves upward in the slide 310 and finally abuts against the abutment surface 312 (such as Figure 2 As shown), the guide ring 400 cannot move further upward relative to the slider 300.

[0043] Figure 6 for Figure 1 Cross-sectional view along the BB direction. Please refer to Figure 6 ,exist Figure 1 , Figure 2In the embodiment of the present invention, a mounting seat is fixed to the bottom of the slider 300 by fasteners, and the fourth rolling body 320 is rotatably arranged on the mounting seat and abuts against the base 200, so that the friction between the slider 300 and the base 200 is rolling friction during the mold opening and closing process. Similar to the installation method of the first rolling body 413, the fourth rolling body 320 is also arranged in two rows. It should be understood that in other embodiments of the present invention, the fourth rolling body can also be rotatably connected to the base and used to abut the slider.

[0044] Figure 7 for Figure 2 Cross-sectional view along CC direction. Please refer to Figure 7 Furthermore, the upper end of the slider 300 is slidably connected to the upper cover 100 via the second rolling body 110. Specifically, a mounting seat is fixed to the side of the upper cover 100 facing the slider 300 via a fastener, and the second rolling body 110 is arranged on the mounting seat. The arrangement method is similar to that of the fourth rolling body 320, and will not be repeated here. Through this structure, it can be achieved that during the process of opening and closing the mold, the friction between the slider 300 and the upper cover 100 is rolling friction, and therefore also has a smaller friction coefficient, thereby achieving the effect of reducing wear and noise during opening and closing the mold. It should be understood that in other embodiments of the present invention, the second rolling body can also be rotatably connected to the slider and abut against the upper cover.

[0045] The tire flexible mold 010 provided in this embodiment provides rolling friction between the guide ring 400 and the slider 300, between the slider 300 and the upper cover 100, and between the slider 300 and the base 200, thereby greatly reducing the friction coefficient between the components, thereby making the mold opening and closing smoother and reducing the probability of mold sticking. At the same time, it reduces noise, reduces the impact of wear on the mold's precision, improves the operation of frequently replacing the wear-resistant plate, and improves the tire vulcanization efficiency. In other embodiments of the present invention, the first rolling body and the second rolling body can be selected.

[0046] In summary, the tire active mold provided by the embodiment of the present invention includes a base, an upper cover, a plurality of sliders arranged between the base and the upper cover along the circumferential direction, and a guide ring sleeved on the outer peripheral side of the plurality of sliders. The slider is slidably connected to the base and the upper cover respectively so that the slider can move radially relative to the upper cover. The guide ring is movably connected to the slider, and the mating surfaces of the two are inclined relative to the axis of the guide ring, so that when the guide ring moves away from the base in the direction of its own axis, it can drive the slider to move radially outward. Among them, a rolling body is arranged between the guide ring and the slider, or / and between the slider and the upper cover, so the friction between the guide ring and the slider, or / and between the slider and the upper cover is rolling friction. Compared with the sliding friction used in the current technology, its friction coefficient can be reduced by more than 70%, reducing wear, thereby improving the mold precision. And compared with the active mold of the current technology, it does not need to frequently replace the wear-resistant plate, so the processing efficiency is also improved. With the reduction of friction, the opening and closing of the mold becomes smooth, the noise is also reduced, and the probability of mold sticking can be reduced.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tire flexible mold, characterized in that: It includes: Base; An upper cover spaced apart from the base; A plurality of sliders are disposed between the base and the upper cover, the plurality of sliders are arranged along a circumferential direction between the base and the upper cover, and the base, the upper cover and the plurality of sliders together form a vulcanization cavity for accommodating a tire; The slider can move radially relative to the upper cover and the base; A guide ring sleeved on the outer sides of the plurality of sliders, the guide ring being movably connected to the slider, and having a mating surface inclined relative to the axis of the guide ring between the guide ring and the slider; the guide ring is configured to drive the slider to move radially outward when the guide ring moves away from the base in the direction of its own axis; Wherein, a first rolling body is arranged between the guide ring and the slider to realize rolling friction between the guide ring and the slider, and / or a second rolling body is arranged between the upper cover and the slider to realize rolling friction between the upper cover and the slider; One of the guide ring or the slider is provided with a sliding portion, and the other of the guide ring or the slider is provided with a sliding groove, wherein the sliding portion is embedded in the sliding groove and is slidably connected to the sliding groove through the first rolling body; When the slide groove is located at the guide ring and the sliding part is located at the slider, a strip-shaped mounting part is fixedly arranged on both sides of the slide groove of the guide ring, the two mounting parts are parallel and spaced apart, the spacing distance between the two mounting parts is smaller than the bottom width of the slide groove, and the opening of the slide groove is formed at the spacing between the two mounting parts; the first rolling bodies are arranged on the wall surfaces facing the groove bottom on both sides of the slide groove opening; the third rolling body is also arranged on the inner side surface of the guide ring facing the slider outside the slide groove; The plurality of third rolling bodies are arranged in two rows on both sides of the slide groove.

2. The tire flexible mold according to claim 1, characterized in that: The inner side surface of the guide ring is a conical surface, the sliding part is arranged on the inner side surface of the guide ring, the slide groove is arranged on the outer side of the slider, the sliding part includes a guide bar connected to the inner side surface of the guide ring and a mounting bar connected to the guide bar, the mounting bar is wider than the guide bar so that the cross-section of the sliding part is T-shaped, the slide groove is a T-shaped groove, and a plurality of the first rolling bodies are arranged on the side of the mounting bar facing the guide ring.

3. The tire flexible mold according to claim 2, characterized in that: The plurality of first rolling bodies are divided into two rows and arranged on the mounting strip, and the two rows of first rolling bodies are respectively located on both sides of the guide strip.

4. The tire flexible mold according to claim 3, characterized in that: The first rolling body is rotatably connected to the mounting bar via a bearing.

5. The tire flexible mold according to any one of claims 1 to 3, characterized in that: The first rolling element is one of a roller, a ball or a needle.

6. The tire flexible mold according to claim 1, characterized in that: A limit block is arranged on the guide ring, and the sliding block is provided with an abutting surface for abutting against the limit block.

7. The tire flexible mold according to claim 1, characterized in that: A fourth rolling body is arranged between the slider and the base, and the slider and the base are slidably connected via the fourth rolling body.

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