Tire compound pre-positioning device and building machine

Abstract

This invention provides a tire rubber pre-positioning device and a molding machine. The tire rubber pre-positioning device includes: a transfer ring, multiple support arms, and a clamping ring. Each support arm is arranged circumferentially along the transfer ring, and the rubber material is supported on the outside of the support arm. The support arm has a first abutment position. The clamping ring is axially movable relative to the transfer ring and has a second abutment position. When the clamping ring moves towards the transfer ring, the second abutment position abuts against one side of the rubber material, and the other side of the rubber material abuts against the first abutment position, thereby adjusting the position of the rubber material. This invention solves the problem of low rubber material positioning accuracy in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of tire forming equipment, and more specifically, to a tire rubber prepositioning device and a forming machine. Background Technology

[0002] Currently, in the process of applying and bonding annular strip rubber compound to tire blanks, the positioning method for the annular strip rubber compound typically involves manually or robotically placing the annular strip rubber compound on a non-powered support arm. The non-powered support arm has guide rod cylinders with limit plates at the end. The rubber compound is positioned by pushing it outward with the guide rod cylinders. However, this method has significant limitations and shortcomings: 1. When the guide rod cylinders push the annular strip rubber compound outward, not only can the synchronization of each set of guide rod cylinders not be effectively guaranteed, but the frictional resistance between each non-powered support arm and the annular strip rubber compound is inconsistent, thus affecting positioning accuracy; 2. Because there is no effective positioning device on the outer side of the annular strip rubber compound, the stroke of the rubber compound cannot be guaranteed to be completely consistent, thus compromising positioning accuracy; 3. Multiple sets of guide rod cylinders are required, resulting in high mechanical and pneumatic costs. Utility Model Content

[0003] The main objective of this invention is to provide a tire rubber pre-positioning device and a molding machine to solve the problem of low rubber positioning accuracy in the prior art.

[0004] To achieve the above objectives, according to one aspect of the present invention, a tire rubber pre-positioning device is provided, comprising: a transfer ring, a plurality of support arms and a clamping ring, each support arm being arranged circumferentially along the transfer ring, the rubber being supported on the outside of the support arm, and the support arm having a first abutment position; the clamping ring being axially movable relative to the transfer ring, the clamping ring having a second abutment position, wherein when the clamping ring moves toward the transfer ring, the second abutment position abuts against one side of the rubber and abuts the other side of the rubber against the first abutment position, thereby adjusting the position of the rubber.

[0005] Furthermore, the support arm includes positioning elements, each positioned along the circumference of the transfer ring, and each positioning element has a radially extending abutment surface, which serves as a first abutment position.

[0006] Furthermore, the positioning element includes a first section and a second section that are bent and connected. The first section extends axially along the transfer ring, and the second section extends radially along the transfer ring. The side of the second section facing the clamping ring is the abutment surface.

[0007] Furthermore, the clamping ring includes multiple pressing members, each pressing member being arranged circumferentially along the transfer ring. Each pressing member includes a first segment and a second segment that are bent and connected. The first segment extends axially along the clamping ring, and the second segment extends radially along the clamping ring. The side of the second segment facing the transfer ring is a second abutment position.

[0008] Furthermore, the pressing member is radially movable along the clamping ring and has an adjustment position that abuts against the side of the rubber material end and a pressing position that abuts against the circumferential side of the rubber material. The diameter of each pressing member when it is in the adjustment position is greater than the diameter when it is in the pressing position.

[0009] Furthermore, the tire rubber prepositioning device also includes a pushing drive component, which is driven to connect with the pushing component and is capable of driving the second segment to switch between the adjustment position and the pressing position.

[0010] Furthermore, the support arm includes multiple rolling elements, which are movable and / or rollable relative to the transfer ring. The rolling elements form a support surface, on which the rubber material is supported. When the rubber material moves, it drives the rolling elements to move and / or roll.

[0011] Furthermore, the tire rubber prepositioning device also includes a first driving member, which is drivenly connected to the support arms and drives each support arm to move away from or towards each other in order to clamp or release the rubber.

[0012] Furthermore, the tire rubber prepositioning device also includes a second driving member and a third driving member. The second driving member is driven to connect with the transfer ring and drives the transfer ring to move axially; the third driving member is driven to connect with the clamping ring and drives the clamping ring to move axially.

[0013] According to another aspect of the present invention, a molding machine is provided, including the above-described tire rubber prepositioning device.

[0014] By applying the technical solution of this utility model, the first and second abutting positions are respectively set on opposite sides of the rubber material to abut, thereby positioning the rubber material on both sides, ensuring the pre-positioning effect of the rubber material. Compared with the traditional method of positioning only one side of the rubber material by pushing the rubber material outward, the positioning method of this embodiment can improve the pre-positioning accuracy of the rubber material, which is beneficial to improving tire quality and production efficiency. Moreover, the positioning method of this embodiment by abutting is less expensive than the traditional method of pushing the rubber material with a cylinder, which helps to reduce costs. In addition, the support arm is set along the circumference of the transfer ring to form an annular support surface to support the annular rubber material and prevent the rubber material from falling, thereby improving production efficiency. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the tire rubber prepositioning device of this utility model is shown.

[0017] The above figures include the following reference numerals:

[0018] 10. Transfer ring; 20. Support arm; 21. Positioning component; 30. Clamping ring; 31. Pushing component; 311. First segment; 312. Second segment; 40. First driving component; 50. Second driving component; 60. Third driving component; 70. Rubber material. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0022] To address the problem of low positioning accuracy of rubber compound in existing technologies, this utility model provides a tire rubber compound pre-positioning device and a molding machine, wherein the molding machine includes the tire rubber compound pre-positioning device described below.

[0023] like Figure 1 The tire rubber prepositioning device shown includes: a transfer ring 10, a plurality of support arms 20 and a clamping ring 30. Each support arm 20 is arranged circumferentially along the transfer ring 10. Rubber 70 is supported on the outside of the support arm 20. The support arm 20 has a first abutment position. The clamping ring 30 is axially movable relative to the transfer ring 10. The clamping ring 30 has a second abutment position. When the clamping ring 30 moves toward the transfer ring 10, the second abutment position abuts against one side of the rubber 70 and abuts the other side of the rubber 70 against the first abutment position to adjust the position of the rubber 70.

[0024] In this embodiment, by setting the first abutment position and the second abutment position to abut on opposite sides of the rubber material 70, the rubber material 70 can be positioned on both sides, thus ensuring the pre-positioning effect of the rubber material 70. Compared with the traditional method of positioning only one side of the rubber material 70 by pushing the rubber material 70 outward, the positioning method of this embodiment can improve the pre-positioning accuracy of the rubber material 70, thereby improving tire quality and production efficiency. Moreover, the positioning method of this embodiment by abutment is less expensive than the traditional method of pushing the rubber material 70 with a cylinder, which helps to reduce costs. In addition, the support arm 20 is arranged circumferentially along the transfer ring 10 to form an annular support surface to support the annular rubber material 70 and prevent the rubber material 70 from falling, thereby improving production efficiency.

[0025] It should be noted that the rubber compound 70 is supported on the outside of the support arm 20, where "outer side" refers to the surface of the support arm 20 that is away from the axis of the transmission ring 10. In this embodiment, the rubber compound 70 refers to an annular strip-shaped rubber compound 70 such as the tread. Therefore, multiple support arms 20 are provided to form an annular support surface for supporting the rubber compound 70 on the outside of the support arm 20.

[0026] In this embodiment, the support arm 20 includes positioning members 21, each positioning member 21 is arranged along the circumference of the transfer ring 10, and the positioning member 21 has a radially extending abutment surface, which serves as a first abutment position, so that the side of the adhesive 70 close to the transfer ring 10 can be abutted by the first abutment position, thereby improving the consistency of the axial position of the side of the adhesive 70 close to the transfer ring 10, thereby improving the pre-positioning accuracy of the adhesive 70. Specifically, in this embodiment, multiple positioning elements 21 are provided and arranged circumferentially along the transfer ring 10, thus having multiple circumferentially arranged abutment surfaces, thereby forming an annular first abutment position. In this way, when the clamping ring 30 moves towards the transfer ring 10 and abuts against the adhesive 70, on the one hand, the side of the adhesive 70 away from the clamping ring 30 can abut against the first abutment position, thereby achieving positioning of the adhesive 70. On the other hand, the annular first abutment surface can achieve uniform abutment against the adhesive 70, avoiding deformation of the adhesive 70 caused by uneven abutment in some areas. At the same time, it avoids the problem of poor synchronization of multiple cylinders when the traditional cylinder pushes the adhesive 70, thereby ensuring the consistency of the axial position of the side of the adhesive 70 away from the transfer ring 10. Moreover, it eliminates the need for multiple guide rod cylinders in the traditional positioning method, directly reducing mechanical and pneumatic costs, and also reducing subsequent maintenance costs.

[0027] Preferably, each positioning element 21 is provided with an adjusting element, which is movably configured with the positioning element 21. The adjusting element can adjust the position of the positioning element 21 along the axial direction of the transfer ring 10, thereby ensuring the consistency of the axial position of each contact surface and thus ensuring the pre-positioning accuracy of the rubber compound 70. Before using the tire rubber compound pre-positioning device, it is necessary to check the consistency of the axial position of the positioning elements 21. When the axial positions of the positioning elements 21 are inconsistent, it is necessary to adjust the adjusting element corresponding to each positioning element 21 to ensure that the contact surfaces of each positioning element 21 are in the same plane, thereby ensuring the pre-positioning accuracy of the rubber compound 70. Optionally, the adjusting element can be a limit screw.

[0028] In this embodiment, the positioning member 21 includes a first segment and a second segment that are bent and connected. The first segment extends axially along the transfer ring 10, and the second segment extends radially along the transfer ring 10. The side of the second segment facing the clamping ring 30 is the abutment surface, thereby achieving both reliable positioning of the adhesive 70 and ensuring stable connection of the positioning member 21. Specifically, the positioning member 21 in this embodiment is L-shaped, with the first and second segments arranged perpendicularly. The first segment is located on the side of the second segment away from the clamping ring 30, and is located at the outer diameter of the second segment. In this way, on the one hand, when the adhesive 70 moves axially and approaches the second segment, it abuts against the surface of the second segment away from the first segment, thereby positioning the axial position of the adhesive 70. On the other hand, the first and second segments form a space facing the axis of the transfer ring 10, which facilitates reliable connection between the positioning member 21 and other components of the support arm 20, while also covering other components of the support arm 20 within the space near the axis of the transfer ring 10 to prevent damage.

[0029] In this embodiment, the clamping ring 30 includes a plurality of pressing members 31, each pressing member 31 being arranged circumferentially along the transfer ring 10. Each pressing member 31 includes a first segment 311 and a second segment 312 that are bent and connected. The first segment 311 extends axially along the clamping ring 30, and the second segment 312 extends radially along the clamping ring 30. The side of the second segment 312 facing the transfer ring 10 is a second abutment position, thereby further improving the pre-positioning accuracy of the adhesive 70. Specifically, the structure of the pressing member 31 in this embodiment is similar to that of the positioning member 21, also being L-shaped. The first segment 311 is located on the side of the second segment 312 away from the transfer ring 10, and the first segment 311 and the second segment 312 are connected on the side closer to the axis of the clamping ring 30. In this way, on the one hand, when the clamping ring 30 moves towards the transfer ring 10, the second abutment position approaches and abuts one side of the rubber material 70, thereby pushing the other side of the rubber material 70 towards the positioning member 21. The clamping ring 30 continues to move, so that the other side of the rubber material 70 abuts with the first abutment position, thereby making both sides of the rubber material 70 abutted, thus improving the pre-positioning accuracy of the rubber material 70. On the other hand, multiple second segments 312 are arranged circumferentially along the clamping ring 30, and their side near the transfer ring 10 forms an annular second abutment position. The first abutment position and the second abutment position are both set to an annular shape consistent with the rubber material 70, so that both sides of the rubber material 70 are abutted around the circumference, thereby ensuring the consistency of the axial position of the rubber material 70, thereby reducing the deformation of the rubber material 70, and thus improving the pre-positioning accuracy of the rubber material 70.

[0030] Preferably, the pressing member 31 is radially movable along the clamping ring 30 and has an adjustment position abutting against the end side of the adhesive material 70 and a pressing position abutting against the circumferential side of the adhesive material 70. This allows the pressing member 31 to move axially to abut against the end side of the adhesive material 70 and also radially to abut against the circumferential side of the adhesive material 70. Specifically, both the first segment 311 and the second segment 312 are plate-shaped with a certain surface area to facilitate contact with the adhesive material 70. In this embodiment, the adjustment position of the pressing member 31 is the position where the second segment 312 abuts against the end side of the adhesive material 70. When the pressing member 31 is in the adjustment position, it can cooperate with the positioning member 21 to position the axial position of the adhesive material 70. The pressing position is where the first segment 311 abuts against the circumferential side of the rubber material 70. When the pressing member 31 is in the pressing position, it can press the rubber material 70 onto the drum and compact the rubber material 70 radially along the clamping ring 30, thus achieving the pressing and compaction of the rubber material 70 with the tire blank on the drum. This enables the pressing member 31 to be used in multiple functions, and the overall structure is simple, practical, and has high positioning accuracy. Considering that in this embodiment, when the rubber material 70 is in the adjustment position, the support arm 20 is in an expanded state to facilitate the positioning and conveying of the rubber material 70, and when the rubber material 70 is in the pressing position, the support arm 20 drives the rubber material 70 to a contracted state so that the rubber material 70 can contact the tire blank on the drum, the diameter of each pressing member 31 when it is in the adjustment position is larger than the diameter when it is in the pressing position.

[0031] It should be noted that, in this embodiment, the end sides of the adhesive 70 refer to the two sides of the adhesive 70 that are perpendicular to the axial direction of the transfer ring 10, which are the two sides of the adhesive 70 mentioned in this embodiment. They are also the two sides that abut against the first contact position and the second contact position respectively. The peripheral side of the adhesive 70 is the outer peripheral side of the adhesive 70 between the two end sides.

[0032] In this embodiment, the tire rubber prepositioning device further includes a pushing drive component, which is drivenly connected to the pushing component 31 and can drive the second segment 312 to switch between an adjustment position and a pressing position, thereby realizing the multi-functional application of the pushing component 31 abutting the rubber 70 axially and pressing the rubber 70 radially. Specifically, the pushing drive component of this embodiment can drive the pushing component 31 to move away from the axis of the clamping ring 30 radially, so that the pushing component 31 is in the adjustment position, thereby putting the rubber 70 in an expanded state. At the same time, it can drive the pushing component 31 to move closer to the axis of the clamping ring 30 radially, so that the pushing component 31 is in the pressing position, so that the rubber 70 contacts the tire blank on the drum.

[0033] In this embodiment, the support arm 20 includes multiple rolling elements. These rolling elements are movable and / or rollable relative to the transfer ring 10. The rolling elements form a support surface on which the rubber material 70 is supported. When the rubber material 70 moves, it drives the rolling elements to move and / or roll, thereby reducing the frictional force experienced by the rubber material 70 during its movement and thus reducing deformation. Specifically, the rolling elements in this embodiment include multiple rolling bearings. When the pressing member 31 pushes the rubber material 70 to move on the rolling elements, the rolling bearings roll accordingly, thereby reducing the resistance experienced by the rubber material 70 and preventing damage during its movement. Preferably, the rolling elements can also be configured to move axially along the transfer ring 10. When the rubber material 70 moves axially along the rolling elements under the action of the pressing member 31, the rolling elements can passively move axially with the rolling elements to reduce the frictional force experienced by the rubber material 70. The rolling elements can also be configured to be both axially movable and rollable simultaneously, thereby further reducing the frictional force experienced by the rubber material 70 during its movement. Of course, the rolling element can also be configured with multiple balls that contact the surface of the rubber material 70, which can also generate rolling during the movement of the rubber material 70, thereby reducing the friction between the rubber material 70 and the rolling element.

[0034] In this embodiment, the tire rubber pre-positioning device further includes a first driving member 40, which is drivenly connected to the support arms 20 and drives each support arm 20 to move away from or towards each other to clamp or release the rubber 70, thereby allowing the support arms 20 to flexibly adjust the clamping state of the rubber 70 as needed. When the rubber 70 is placed on the support arm 20, the first driving member 40 drives the support arms 20 to move closer to each other, thereby reducing the diameter of the support surface formed by the support arms 20, so that the rubber 70 can be fitted onto the outside of the support surface. When the position of the rubber 70 is pre-positioned, the support arms 20 move away from each other, thereby supporting the rubber 70 in a circular shape, so that the positioning member 21 and the pushing member 31 can abut against the end face of the rubber 70. In this way, the support surface formed by the support arms 20 can be flexibly adjusted to adapt to the position requirements of the rubber 70, and the structure of the support arm 20 with an adjustable support surface diameter can adapt to rubber 70 with different diameters, thereby improving the versatility of the tire rubber pre-positioning device. Optionally, the first driving element 40 may be a motor, which drives all the support arms 20 to move closer to each other or further away from each other simultaneously.

[0035] In this embodiment, the tire rubber pre-positioning device further includes a second driving member 50 and a third driving member 60. The second driving member 50 is driven to move the transfer ring 10 axially, thereby enabling the transfer ring 10 to drive the support arm 20 and the rubber 70 to move axially, thus realizing the transfer function of the rubber 70. The third driving member 60 is driven to move the clamping ring 30 axially, thereby enabling the clamping ring 30 to move axially closer to and further away from the transfer ring 10, thus realizing the contact and clamping of the rubber 70. At the same time, according to actual needs, the clamping ring 30 can also move to a position to avoid other components. Optionally, the second driving member 50 and the third driving member 60 can be motors.

[0036] In this embodiment, the transfer ring 10 is configured as a circular ring, serving as a carrier for the support arm 20, the first driving member 40, etc. Both the support arm 20 and the first driving member 40 can be mounted on the transfer ring 10, and the second driving member 50 drives the support arm 20 and the rubber material 70 to move axially along the base of the tire rubber material pre-positioning device. The clamping ring 30 also includes a ring body, which is circular. The ring body of the clamping ring 30 is coaxially arranged with the transfer ring 10, serving as a carrier for the pressing member 31. The pressing member 31 is mounted on the ring body of the clamping ring 30, and both the ring body of the clamping ring 30 and the pressing member 31 can move axially along the driving member of the third driving member 60.

[0037] The process of using the tire rubber pre-positioning device in this embodiment is as follows: 1. Rubber material 70 is placed on the support arm 20 by manual labor or a robotic arm; 2. The first driving member 40 drives the support arm 20 away from each other, thereby expanding the rubber material 70; 3. The third driving member 60 drives the clamping ring 30 to move axially and approach the transfer ring 10, and the pushing member 31 pushes the rubber material 70 close to the first contact position; 4. When the pushing member 31 pushes the rubber material 70 into contact with the first contact position, it continues to push, causing the rubber material 70 to undergo slight deformation. At this time, the clamping ring 30 stops moving; 5. The third driving member 60 drives the clamping ring 30 to move away from the transfer ring 10. The clamping ring 30 moves slowly along the axial direction to ensure that the slight deformation of the rubber material 70 slowly recovers until the pushing member 31 and the rubber material 70 disengage. At this time, the pre-positioning of the rubber material 70 is completed, laying the foundation for the next bonding process. This process requires no operator intervention, boasts high positioning accuracy (within 0.5mm), improves production efficiency, and significantly enhances tire quality.

[0038] It should be noted that "multiple" in the above embodiments refers to at least two.

[0039] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0040] 1. It solves the problem of low positioning accuracy of rubber compound in existing technologies;

[0041] 2. By setting the first abutting position and the second abutting position to abut on opposite sides of the rubber material, the rubber material can be positioned on both sides, thereby ensuring the pre-positioning effect of the rubber material. Compared with the traditional method of positioning only one side of the rubber material by pushing the rubber material outward, the positioning method of this embodiment can improve the pre-positioning accuracy of the rubber material, which is conducive to improving tire quality and production efficiency.

[0042] 3. This embodiment uses a contact method for positioning, which is less costly. Compared with the traditional method of using a cylinder to push the rubber material, it is beneficial to reduce costs. In addition, the support arm is set along the circumference of the transfer ring, thereby forming a ring-shaped support surface to support the ring-shaped rubber material and prevent the rubber material from falling, which helps to improve production efficiency.

[0043] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0044] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tire rubber pre-positioning device, characterized in that, include: Transfer loop (10); Multiple support arms (20) are provided, each of the support arms (20) being arranged circumferentially along the transfer ring (10), and rubber material (70) is supported on the outside of the support arm (20), the support arm (20) having a first abutment position; A clamping ring (30) is axially movable relative to the transfer ring (10). The clamping ring (30) has a second abutment position. When the clamping ring (30) moves toward the transfer ring (10), the second abutment position abuts against one side of the adhesive material (70) and abuts the other side of the adhesive material (70) against the first abutment position to adjust the position of the adhesive material (70).

2. The tire rubber pre-positioning device according to claim 1, characterized in that, The support arm (20) includes positioning elements (21), each of the positioning elements (21) being arranged circumferentially along the transfer ring (10), the positioning element (21) having a radially extending abutment surface, the abutment surface serving as the first abutment position.

3. The tire rubber pre-positioning device according to claim 2, characterized in that, The positioning member (21) includes a first section and a second section that are bent and connected. The first section extends axially along the transfer ring (10), and the second section extends radially along the transfer ring (10). The side of the second section facing the clamping ring (30) is the abutment surface.

4. The tire rubber pre-positioning device according to claim 1, characterized in that, The clamping ring (30) includes a plurality of pushing members (31), each of the pushing members (31) being arranged circumferentially along the transfer ring (10). Each pushing member (31) includes a first segment (311) and a second segment (312) that are bent and connected. The first segment (311) extends axially along the clamping ring (30), and the second segment (312) extends radially along the clamping ring (30). The side of the second segment (312) facing the transfer ring (10) is the second abutment position.

5. The tire rubber pre-positioning device according to claim 4, characterized in that, The pushing member (31) is movably disposed radially along the clamping ring (30) and has an adjustment position abutting against the end side of the rubber material (70) and a pressing position abutting against the peripheral side of the rubber material (70). The diameter of each pushing member (31) when it is in the adjustment position is greater than the diameter when it is in the pressing position.

6. The tire rubber pre-positioning device according to claim 5, characterized in that, The tire rubber prepositioning device further includes a push drive component, which is driven to connect with the push component (31) and can drive the second segment (312) to switch between the adjustment position and the pressing position.

7. The tire rubber pre-positioning device according to claim 1, characterized in that, The support arm (20) includes a plurality of rolling elements, which are movable and / or rollable relative to the transfer ring (10). The rolling elements form a support surface, and the adhesive material (70) is supported on the support surface. When the adhesive material (70) moves, it drives the rolling elements to move and / or roll.

8. The tire rubber pre-positioning device according to any one of claims 1 to 7, characterized in that, The tire rubber prepositioning device further includes a first driving member (40), which is drivenly connected to the support arm (20) and drives each of the support arms (20) to move away from or towards each other in order to clamp or release the rubber (70).

9. The tire rubber pre-positioning device according to any one of claims 1 to 7, characterized in that, The tire rubber pre-positioning device further includes: The second driving member (50) is drivingly connected to the transmission ring (10) and drives the transmission ring (10) to move axially; The third driving member (60) is drivingly connected to the clamping ring (30) and drives the clamping ring (30) to move axially.

10. A molding machine, characterized in that, The tire rubber prepositioning device includes any one of claims 1 to 9.

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