CN211222145U - Turn-up forming equipment and three-drum forming machine - Google Patents

Abstract

The utility model provides a turn over package former and three drum make-up machines. Wherein, anti-equipment of wrapping includes: the tire body and the tire side structure are sleeved on the forming drum, and the forming drum rotates to drive the tire body and the tire side structure to rotate; the turn-up bladder is connected with the forming drum and has an inflation state for attaching the first part of the sidewall structure to the tire body; after the turn-up bladder exhausts, a turn-up gap is formed between the turn-up bladder and a second part of the sidewall structure, which is not attached to the tire body; and the compression roller assembly comprises a turn-up compression roller, and the turn-up compression roller is movably arranged relative to the forming drum so that the turn-up compression roller extends into the turn-up gap and rolls the second part of the side wall structure onto the tire body. The technical scheme of the utility model the longer problem of anti-package time of anti-package former among the prior art has been solved.

Description

Turn-up forming equipment and three-drum forming machine

Technical Field

The utility model relates to a tire manufacturing technical field particularly, relates to a turn-up former and three drum make-up machines.

Background

In the related art, a turn-up molding device adopts a mechanical drum to turn up a sidewall structure on a tire body, and an indentation is left on the sidewall structure, so that the uniformity of tire cord fabric arrangement is influenced, and the quality of a tire is influenced; the other type of turn-up forming equipment adopts the cooperation of the turn-up bladder and the boosting bladder, the turn-up bladder and the boosting bladder are controlled to be inflated to enable the tire side structure to be completely attached to the tire body, and the diameter of the inflated bladder is large, so that the service life of the inflated bladder is short and the inflation time is long.

In addition, the two types of turn-up molding equipment need to roll the sidewall structure on the tire body once, so that the turn-up time is long.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a turn-up former and three drum make-up machines to solve the longer problem of turn-up time of the turn-up former among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an anti-ladle forming apparatus, comprising: the tire body and the tire side structure are sleeved on the forming drum, and the forming drum rotates to drive the tire body and the tire side structure to rotate; the turn-up bladder is connected with the forming drum and has an inflation state for attaching the first part of the sidewall structure to the tire body; after the turn-up bladder exhausts, a turn-up gap is formed between the turn-up bladder and a second part of the sidewall structure, which is not attached to the tire body; and the compression roller assembly comprises a turn-up compression roller, and the turn-up compression roller is movably arranged relative to the forming drum so that the turn-up compression roller extends into the turn-up gap and rolls the second part of the side wall structure onto the tire body.

Furthermore, along the radial direction of the tire body, the height of the turn-up bladder on one side of the forming drum is H1, the height of the tire body on one side of the forming drum is H2, and H1/H2 is 1/4-1/2.

Further, the roll assembly further comprises: the bracket is movably arranged along the radial direction of the tire body; the cylinder, the cylinder setting is on the support, and the output shaft and the anti-compression roller of cylinder are connected to through the axially movable setting of cylinder drive anti-compression roller along tire body.

Further, the cylinder is rotatably arranged relative to the bracket; the compression roller assembly further comprises: the bracket is arranged on the mounting plate; the servo motor is arranged on the mounting plate and is arranged at intervals with the bracket; the steering box is arranged on the mounting plate, and an input shaft of the steering box is connected with an output shaft of the servo motor through a rotating shaft; an output shaft of the steering box is connected with a cylinder body of the air cylinder, and the output shaft of the steering box is perpendicular to an input shaft of the steering box, so that the servo motor drives the cylinder body to drive the reverse wrapping pressing roller to rotate relative to the support through the rotating shaft.

According to another aspect of the utility model, a three-drum forming machine is provided, and three-drum forming machine includes the anti-equipment of wrapping, and the anti-equipment of wrapping is foretell anti-equipment of wrapping.

Use the technical scheme of the utility model, the structure through changing anti-package former has changed anti-package former. Specifically, a first part of the sidewall structure is attached to the tire body by utilizing the turn-up bladder, then the forming drum is controlled to drive the sidewall structure to rotate, the turn-up bladder is controlled to exhaust, and a second part of the sidewall structure, which is not attached to the tire body, forms a turn-up gap with the turn-up bladder under the action of centrifugal force; and controlling the turn-up roller to extend into the turn-up gap and roll the second part of the side wall structure onto the tire body. In this way, the turn-up bladder, the forming drum and the turn-up compression roller are matched to realize the spin-draw turn-up, the tire side structure does not need to be rolled again after the turn-up bladder is turned up, the turn-up time is favorably shortened, and the turn-up efficiency is improved; meanwhile, in the application, the turn-up bladder only needs to enable the first part of the sidewall structure to be attached to the tire body, so that the diameter of the turn-up bladder can be reduced, the inflation time of the turn-up bladder is shortened, the turn-up time is further shortened, and the turn-up efficiency is improved; in addition, in this application, adopt the turn-up compression roller directly to roll the second part of side wall structure on tire body, can avoid producing the bubble between side wall structure and the tire body, turn-up quality is better to be favorable to promoting tire production quality.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a turn-up forming apparatus according to an alternative embodiment of the present invention in one state;

FIG. 2 is a schematic view showing the structure of the apparatus of FIG. 1 in another state;

FIG. 3 is a schematic view showing the structure of the apparatus of FIG. 1 in a further state;

fig. 4 shows a schematic structural view of a press roll assembly of the reverse-forming apparatus of fig. 1.

Wherein the figures include the following reference numerals:

1. a sidewall structure; 2. a tire body; 100. a turn-up gap; 10. turning and packaging the capsules; 20. a forming drum; 21. a flange; 30. a press roll assembly; 31. a reverse wrapping press roller; 32. a support; 33. a cylinder; 34. a servo motor; 35. a steering box; 36. a rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In order to solve the longer problem of anti-package time of the anti-package former among the prior art, the utility model provides an anti-package former and three drum make-up machines.

The application provides a turn-up former for with side wall structure 1 laminating on tire body 2. As shown in fig. 1 to 4, the turn-up forming device comprises a turn-up bladder 10, a forming drum 20 and a compression roller assembly 30, wherein the tire body 2 and the sidewall structure 1 are sleeved on the forming drum 20, the forming drum 20 rotates to drive the tire body 2 and the sidewall structure 1 to rotate, the turn-up bladder 10 is connected with the forming drum 20, and the turn-up bladder 10 has an inflation state for attaching a first part of the sidewall structure 1 to the tire body 2; wherein, after the turn-up bladder 10 exhausts, a turn-up gap 100 is formed between the turn-up bladder 10 and a second part of the sidewall structure 1, which is not attached to the tire body 2, the roller assembly 30 comprises a turn-up roller 31, and the turn-up roller 31 is movably arranged relative to the forming drum 20, so that the turn-up roller 31 extends from the turn-up gap 100 and rolls the second part of the sidewall structure 1 onto the tire body 2. In the embodiment, the turn-up bladder 10 only needs to attach the first part of the sidewall structure 1 to the tire body 2, so that the size of the turn-up bladder 10 is reduced, the inflation time of the turn-up bladder 10 is shortened, the turn-up efficiency is improved, and the inflated pressure of the part of the turn-up bladder 10 close to the forming drum 20 is higher, so that the first part of the sidewall structure 1 can be better attached to the tire body 2 under the pressing of the turn-up bladder 10, and bubbles are prevented from being generated between the first part of the sidewall structure 1 and the tire body 2; the size of the turn-up capsule 10 is reduced, and meanwhile, a boosting capsule is eliminated, so that the manufacturing cost of turn-up forming equipment is reduced; after the turn-up bladder 10 exhausts to generate a turn-up gap 100, the turn-up press roller 31 is used for rolling the second part of the sidewall structure 1 onto the tire body 2, so that the turn-up quality and the turn-up efficiency are improved.

Alternatively, as shown in fig. 1, the height of the turn-up bladder 10 on the side of the forming drum 20 is H1, and the height of the tire body 2 on the side of the forming drum 20 is H2, H1/H2 is 1/4 to 1/2 in the radial direction of the tire body 2. Experiments show that when the relation between H1 and H2 is within the numerical range, the anti-ladle effect is good, and the anti-ladle efficiency is high.

In one particular embodiment of the present application, H1/H2 ═ 1/3.

As shown in fig. 4, the pressing roller assembly 30 further includes a bracket 32 and an air cylinder 33, the bracket 32 is movably disposed along the radial direction of the tire body 2, the air cylinder 33 is disposed on the bracket 32, and an output shaft of the air cylinder 33 is connected with the anti-wrapping pressing roller 31 so as to drive the anti-wrapping pressing roller 31 to be movably disposed along the axial direction of the tire body 2 through the air cylinder 33. In this way, the bracket 32 drives the turn-up roller 31 to move to a position opposite to the turn-up gap 100 along the radial direction of the tire body 2, and the cylinder 33 is used for controlling the turn-up roller 31 to move along the axial direction of the tire body 2, so that the turn-up roller 31 extends from the turn-up gap 100 until the turn-up roller 31 abuts against the sidewall structure 1; the counter-wrapping roller 31 is then driven by the bracket 32 to retreat along the radial direction of the tire body 2 until the second part of the sidewall structure 1 is completely rolled on the tire body 2.

In a specific implementation, the roller assembly 30 further includes a driving portion, and an output end of the driving portion is in driving connection with the support 32 to drive the support 32 to move along the radial direction of the tire body 2. In this way, it is advantageous to raise the degree of automation of the roll assembly 30.

In specific implementation, two turnup bladders 10 are symmetrically arranged on two axial sides of the tire body 2, two sidewall structures 1 are symmetrically arranged on two axial sides of the tire body 2, and two first parts of the two sidewall structures 1 are respectively attached to two sides of the tire body 2 by using the two turnup bladders 10; the two sets of the pressing roller assemblies 30 are respectively arranged on two axial sides of the tire body 2, and the two anti-wrapping rollers 31 of the two sets of the pressing roller assemblies 30 are used for respectively rolling two second parts of the two sidewall structures 1 on two sides of the tire body 2.

In specific implementation, the driving part is used for driving the supports 32 of the two sets of pressure roller assemblies 30 to move along the radial direction of the tire body 2 synchronously, so that the turn-up efficiency is improved, and the consistency of the two sidewall structures 1 is ensured.

When the concrete implementation, the driving structure controls the two turn-up compression rollers 31 to perform separation and combination movement along the axial direction of the tire body 2, so that the turn-up efficiency is improved, and the consistency of the two side wall structures 1 is ensured.

The forming drum 20 comprises a flange 21 and is connected with the machine box through the flange 21, the machine box drives the forming drum 20 to rotate around the axis of the flange 21 through the flange 21, so that the forming drum 20 drives the tire body 2 and the sidewall structure 1 to rotate, the second part of the sidewall structure 1 cannot fall back under the action of centrifugal force, and a turn-up gap 100 is formed between the second part of the sidewall structure 1 and the turn-up bladder 10.

As shown in fig. 4, the cylinder 33 is rotatably provided with respect to the bracket 32; the compression roller assembly 30 further comprises a mounting plate, a servo motor 34 and a steering box 35, wherein the support 32 is arranged on the mounting plate, the servo motor 34 is arranged on the mounting plate and is arranged at intervals with the support 32, the steering box 35 is arranged on the mounting plate, and an input shaft of the steering box 35 is connected with an output shaft of the servo motor 34 through a rotating shaft 36; an output shaft of the steering box 35 is connected with a cylinder body of the air cylinder 33, and the output shaft of the steering box 35 is perpendicular to an input shaft of the steering box 35, so that the servo motor 34 drives the cylinder body through a rotating shaft 36 to drive the counter-pressure roller 31 to rotate relative to the bracket 32. Utilize to turn to case 35 and servo motor 34 cooperation, drive actuating cylinder 33 and turn up the compression roller 31 and rotate for support 32 to make turn up the compression roller 31 all the time with be the tire body 2 looks vertically that the arc set up, thereby be favorable to promoting the roll extrusion effect.

In specific implementation, the steering box 35 is a bevel gear steering box, an output shaft of the steering box 35 is perpendicular to an input shaft of the steering box 35, and the rotation angle of the rotating shaft 36 is precisely controlled by the servo motor 34, so that the rotation angle of the counter-wrapping roller 31 is precisely controlled. In the application, due to the arrangement of the turn-up bladder 10, the first part of the sidewall structure 1 can be attached to the tire body 2, the rotating speed of the forming drum 20 does not need to be too high, and only the second part of the sidewall structure 1 needs to be ensured not to fall back after the turn-up bladder 10 exhausts.

When in specific use, the turn-up bladder 10 is inflated, and the forming drum 20 rotates at a high speed; the turn-up bladder 10 exhausts, because the forming drum 20 rotates at a high speed, the outer end of the sidewall structure 1 is acted by centrifugal force and can not fall back along with the turn-up bladder 10, so that a turn-up gap 100 is formed between the turn-up bladder 10 and the sidewall structure 1, the turn-up pressure roller 31 is brought to a working position by the bracket 32, the output end of the air cylinder 33 extends out to push out the turn-up pressure roller 31, and the turn-up pressure roller 31 enters along the turn-up gap 100 and is pressed on the sidewall structure 1; the turn-up compression roller 31 is followed support 32 and is made the return motion, and servo motor 34 rotates simultaneously, drives pivot 36 and rotates, and pivot 36 drives the input shaft that turns to case 35 and rotates, turns to the output shaft of case 35 and drives cylinder 33 and rotate, makes cylinder 33 swing certain angle, and cylinder 33 drives the swing of turn-up compression roller 31, makes the angle production change of turn-up compression roller 31 and tire body 2, gradually with the whole roll extrusion of side wall structure 1 to tire body 2. The side wall structure 1 completes the turn-up operation through the combined action of the rotation of the forming drum 20 and the backward movement of the turn-up pressing roller 31, the side surface of the produced tire is smooth and uniform without indentation, the turn-up operation time is short, and the production efficiency of the forming machine is improved.

The application also provides a three-drum forming machine, which comprises the turn-up forming equipment, wherein the turn-up forming equipment is the turn-up forming equipment.

The application provides a turn-up former is applied to three drums and in the make-up machine, can realize the turn-up of side wall structure 1, is favorable to promoting three drums and makes up turn-up efficiency, the life of the turn-up capsule 10 who promotes three drums and make-up machine, promotes the quality of the tire that three drums and make-up machine produced.

Optionally, the three-drum forming machine provided by the present application is an all-steel three-drum forming machine, and the spin-draw and reverse-wrap operation is completed by using the reverse-wrap capsule 10, the forming drum 20 and the reverse-wrap pressure roller 31 in cooperation.

When the side wall structure 1 is attached to the tire body 2 by using the turn-up forming equipment, the method comprises the following steps: step S1, controlling the turn-up bladder 10 to inflate to make the first part of the side wall structure 1 attached to the tire body 2; controlling the forming drum 20 to drive the sidewall structure 1 to rotate; step S2, controlling the turn-up bladder 10 to exhaust so that a turn-up gap 100 is formed between the second part of the sidewall structure 1, which is not attached to the tire body 2, and the turn-up bladder 10; in step S3, the turn-up roller 31 is controlled to extend from the turn-up gap 100 and roll the second portion of the sidewall structure 1 onto the tire body 2.

In the embodiment, as shown in fig. 1, a first portion of the sidewall structure 1 is attached to the tire body 2 by using the turn-up bladder 10, then the forming drum 20 is controlled to drive the sidewall structure 1 to rotate, the turn-up bladder 10 is controlled to exhaust air, and a second portion of the sidewall structure 1, which is not attached to the tire body 2, forms a turn-up gap 100 with the turn-up bladder 10 under the action of centrifugal force; as shown in fig. 2, the turning roll 31 is controlled to extend from the turning gap 100 and roll the second part of the sidewall structure 1 onto the tire body 2; as shown in fig. 3, the counter-pressure roller 31 rolls the second portion of the sidewall structure 1 entirely onto the tire body 2. Therefore, the turnup and turndown are realized by matching the turnup bladder 10, the forming drum 20 and the turnup and turndown roller 31, the tire side structure 1 does not need to be rolled again after the turnup bladder 10 is turned up, the turnup time is shortened, and the turnup efficiency is improved; meanwhile, in the embodiment, the turn-up bladder 10 only needs to make the first part of the sidewall structure 1 attached to the tire body 2, so that the inflated diameter of the turn-up bladder 10 can be reduced, the inflation time of the turn-up bladder 10 can be shortened, the turn-up time can be further shortened, and the turn-up efficiency can be improved; in addition, in this application, adopt turn-up compression roller 31 directly to roll the second part of side wall structure 1 on tire body 2, can avoid producing the bubble between side wall structure 1 and the tire body 2, turn-up quality is better to be favorable to promoting tire production quality.

Optionally, step S3 includes: the control turn-up roller 31 extends from the turn-up gap 100 and enables the turn-up roller 31 to be abutted against the tire side structure 1, the control turn-up roller 31 moves towards one side far away from the forming drum 20 along the radial direction of the tire body 2, and the second part of the tire side structure 1 is rolled onto the tire body 2. Like this, retreat for tire body 2 through control anti-package compression roller 31, roll on tire body 2 with the second part of side wall structure 1, guarantee anti-package compression roller 31 all the time with side wall structure 1 butt to can press side wall structure 1 on tire body 2, avoid producing the bubble between side wall structure 1 and the tire body 2.

In specific implementation, the air exhaust preset time of the turn-up bladder 10 is controlled, so that the turn-up gap 100 is large enough to allow the turn-up roller 31 to extend, and after the tire side structure 1 and the turn-up bladder 10 are ensured not to interfere with the turn-up roller 31, the turn-up roller 31 is controlled to extend from the turn-up gap 100.

Alternatively, while controlling the turn-up roller 31 to move toward the side away from the building drum 20 in the radial direction of the tire body 2, the turn-up roller 31 is controlled to move toward the side close to the tire body 2 in the axial direction of the tire body 2, and the second portion of the sidewall structure 1 is rolled onto the tire body 2 arranged in an arc shape. Like this, the turn-up former that this application provided can be applicable to on being the tire body 2 of arc setting, guarantees turn-up compression roller 31 all the time with side wall structure 1 butt, avoids producing the bubble between side wall structure 1 and the tire body 2.

Alternatively, while controlling the turn-up roller 31 to move toward the side away from the forming drum 20 in the radial direction of the tire body 2, the turn-up roller 31 is controlled to rotate and the turn-up roller 31 is made perpendicular to the tire body 2 arranged in an arc shape. In this way, the rolling effect of the turn-up roller 31 can be improved.

Optionally, controlling two turn-up bladders 10 positioned at two axial sides of the tire body 2 to be inflated simultaneously, so that two sidewall structures 1 positioned at two sides of the tire body 2 are attached to the tire body 2; controlling the forming drum 20 to drive the two sidewall structures 1 to synchronously rotate; controlling the two turn-up bladders 10 to exhaust air simultaneously, and forming two turn-up gaps 100 between the two turn-up bladders 10 and the two sidewall structures 1; and controlling the two turn-up rollers 31 to synchronously extend into the two turn-up gaps 100, and simultaneously rolling the two sidewall structures 1 onto the tire body 2. Therefore, the method is beneficial to further improving the anti-package efficiency and saving the anti-package time.

When the above-mentioned turn-up forming equipment is used for attaching the sidewall structure 1 to the tire body 2, the method further comprises the following steps: in step S4, the forming drum 20 is controlled to stop rotating, and the turn-up operation is completed. And after the other structures of the three-drum forming machine are prepared before the turn-up operation is finished, the steps are repeatedly executed, and the turn-up operation is finished.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the method has the advantages that the forming efficiency of the tire forming machine is required to be improved continuously along with the rapid development of the tire manufacturing industry, the time of a reverse-wrapping forming process of the three-drum forming machine in the related technology is long, and the reverse-wrapping forming process becomes a bottleneck for restricting the speed of the three-drum forming machine; need not utilize and turn up bladder 10 and all laminate the back on tire body 2 with side wall structure 1 and reuse turn up compression roller 31 side wall structure 1 and roll extrusion, be favorable to further promoting and turn up efficiency.

The application provides a turn-up former has faster, high quality and more economic advantage. The application provides turn-up former and three drum make-up machines can realize faster, high quality, more economic tire turn-up former.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A turn-up forming apparatus, characterized in that it comprises:

the tire comprises a forming drum (20), a tire body (2) and a sidewall structure (1) are sleeved on the forming drum (20), and the forming drum (20) rotates to drive the tire body (2) and the sidewall structure (1) to rotate;

-a turn-up bladder (10), said turn-up bladder (10) being connected to said forming drum (20), said turn-up bladder (10) having an inflated condition for fitting a first portion of said sidewall structure (1) on said tyre body (2); wherein, when the turn-up bladder (10) is exhausted, a turn-up gap (100) is formed between the turn-up bladder (10) and a second part of the sidewall structure (1) which is not attached to the tire body (2);

a roller assembly (30), the roller assembly (30) comprising a turn-up roller (31), the turn-up roller (31) being movably arranged relative to the building drum (20) such that the turn-up roller (31) extends from the turn-up gap (100) and rolls the second portion of the sidewall structure (1) onto the tire body (2).

2. The turn-up forming apparatus according to claim 1, characterized in that, in the radial direction of the tire body (2), the height of the turn-up bladder (10) on the side of the forming drum (20) is H1, and the height of the tire body (2) on the side of the forming drum (20) is H2, H1/H2-1/4-1/2.

3. The apparatus of claim 1, wherein the roller assembly (30) further comprises:

a support (32), said support (32) being movably arranged in a radial direction of said tyre body (2);

the air cylinder (33) is arranged on the support (32), and an output shaft of the air cylinder (33) is connected with the turn-up pressure roller (31) so as to drive the turn-up pressure roller (31) to be movably arranged along the axial direction of the tire body (2) through the air cylinder (33).

4. Turn-up forming apparatus according to claim 3, wherein the air cylinder (33) is rotatably arranged with respect to the bracket (32); the press roll assembly (30) further comprises:

a mounting plate on which the bracket (32) is disposed;

the servo motor (34) is arranged on the mounting plate and is spaced from the bracket (32);

the steering box (35) is arranged on the mounting plate, and an input shaft of the steering box (35) is connected with an output shaft of the servo motor (34) through a rotating shaft (36); an output shaft of the steering box (35) is connected with a cylinder body of the air cylinder (33), and the output shaft of the steering box (35) is perpendicular to an input shaft of the steering box (35), so that the servo motor (34) drives the cylinder body to drive the anti-wrapping pressure roller (31) to rotate relative to the bracket (32) through the rotating shaft (36).

5. A three-drum forming machine comprising a turn-up forming apparatus, characterized in that the turn-up forming apparatus is a turn-up forming apparatus according to any one of claims 1 to 4.

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