Multi-composite tire tread pre-die

Abstract

The utility model provides a kind of multi-composite tire tread pre mouth shape, comprising: pre mouth shape main part, pre mouth shape main part is provided with multiple end surfaces, pre mouth shape main part is communicated with extruder flow channel mouth by first end surface, to receive fluid glue, pre mouth shape main part is connected with mouth shape plate by second end surface, to form the tire tread with predetermined cross-sectional shape;Multi-layer composite flow channel, each layer flow channel is provided with several glue inlets and several glue outlets, and the glue outlet of different layer flow channel is provided with preset interval width towards the gel flow direction end, to facilitate the composite between different layer glue material.The utility model uses multi-layer composite flow channel, by introducing and pattern style matching tread pre mouth shape structure, after combination, the composite tread of different pattern can be extruded, improve tread wear resistance and tear resistance, obtain to meet the performance requirements of composite tire tread structure, solve the problem of low tire shoulder hardness and poor tear resistance of previous pre mouth shape.

Description

Technical Field

[0001] This utility model relates to the field of tire processing technology, and in particular to a pre-groove pattern for a multi-composite tire tread. Background Technology

[0002] Low rolling resistance tires produced using existing tread pre-pitch designs often suffer from reduced shoulder wear resistance and under-shoulder support due to their low hardness and poor tear resistance. This makes them prone to circumferential cracks under the shoulder, affecting tire lifespan. Simply changing the tire compound to improve its resistance to chipping and breakage increases rolling resistance, failing to meet fuel efficiency requirements. While adding tread rounded edges to the tread grooves can maintain some shoulder support initially, as mileage increases, the rubber compound ages further, exacerbating cracking.

[0003] To solve the above technical problems, different high wear-resistant and high tear-resistant rubber compounds need to be used in the lower part of the tire shoulder, and in order to maintain the original low rolling resistance characteristics, the tread area still uses low rolling resistance rubber compounds to form a composite tire tread with multiple rubber compounds. However, the existing tire tread pre-gauge structure is difficult to produce a composite tire tread that meets the above requirements.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the shortcomings of the aforementioned technologies, this invention provides a multi-composite tire tread pre-cut pattern. This tread pre-cut pattern structure enables the production of composite tire treads with low rolling resistance and high wear resistance and tear resistance at the tire shoulder, thus solving the problems of existing tire shoulder wear and dynamic circumferential cracking in the under-shoulder area.

[0006] The specific technical solution proposed by this utility model is as follows:

[0007] A pre-groove pattern for a multi-compound tire tread, comprising:

[0008] The pre-ditch body has multiple end faces. The pre-ditch body is connected to the extruder flow channel through the first end face to receive the fluid adhesive. The pre-ditch body is connected to the die plate through the second end face to form a tire tread with a predetermined cross-sectional shape.

[0009] The multi-layer composite flow channel is set on the pre-form body and includes multiple flow channels. Each flow channel is provided with several glue inlets and several glue outlets. The glue outlets of different flow channels are provided with a preset interval width facing the glue outflow direction to facilitate the composite between different layers of glue.

[0010] Furthermore, the first end face is a wide end face, and the pre-gutter body is in contact with the flow channel opening through the wide end face; the second end face is a narrow end face, and the pre-gutter body is in contact with the nozzle plate through the narrow end face.

[0011] Furthermore, the pre-form body is also provided with a third end face, which is an inclined end face, and the inclined end face is connected to the matching end face of the form box.

[0012] Furthermore, the multi-layer composite flow channel includes a top layer flow channel, a middle layer flow channel, and a bottom layer flow channel. Each of the top layer flow channel, the middle layer flow channel, and the bottom layer flow channel independently constitutes a complete fluid passage, and the glue inlet of each layer flow channel is located on the same radial plane.

[0013] Furthermore, the top layer flow channel is located on the upper part of the pre-gutter body, including two top layer branch flow channels. The two top layer branch flow channels are symmetrically distributed along the center line of the pre-gutter body, and the inner diameter of the top layer branch flow channels gradually decreases along the direction from the glue inlet to the glue outlet.

[0014] Furthermore, the cross-section of the top layer flow channel outlet is an irregular polygon with distinct boundaries. The irregular polygon can be composed of an upper rectangle, a middle right trapezoid, and a lower right trapezoid.

[0015] Furthermore, the middle flow channel is symmetrical about the centerline of the pre-gauge body, and the discharge port cross-section of the middle flow channel is a polygon composed of two isosceles trapezoids at the upper and lower ends.

[0016] Furthermore, the lower flow channel is located below the middle flow channel and below the pre-guzzling body, and the cross-section of the lower flow channel outlet is concave.

[0017] Furthermore, the preset interval width is 1.5-2.5cm.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] (1) This utility model uses a multi-layer composite flow channel. By introducing a tread pre-drill structure that matches the tread pattern, composite treads suitable for different patterns can be extruded after combination, improving the wear resistance and tear resistance of the tread. This solves the problems of low tire shoulder hardness and poor tear resistance in the previous pre-drills, thus forming a composite tire tread structure that meets the performance requirements.

[0020] (2) This utility model extrudes the wing rubber part of the composite tire tread through the top layer flow channel rubber outlet, the tread rubber part of the composite tire tread through the middle layer flow channel rubber outlet, and the base rubber part of the composite tire tread through the bottom layer flow channel rubber outlet. The combination of multiple rubber materials improves the wear resistance of the tread shoulder and the support of the shoulder, and solves the existing problems of uneven wear of the shoulder and dynamic circumferential cracks in the shoulder area.

[0021] The multi-layer composite flow channel includes a top layer flow channel, a middle layer flow channel, and a bottom layer flow channel. The design of each layer of flow channel facilitates the flow and compounding of different rubber compounds, resulting in a three-layer composite tread with stable dimensions and less prone to shrinkage and deformation. Attached Figure Description

[0022] Figure 1 This is an overall schematic diagram of the pre-groove pattern of the multi-composite tire tread in this utility model;

[0023] Figure 2 This is a rear view schematic diagram of the pre-groove pattern of the multi-composite tire tread in this utility model;

[0024] Figure 3 This is a schematic diagram of the pre-cut tread pattern of the multi-composite tire in this utility model from perspective A;

[0025] Figure 4 This is a cross-sectional view along the FF direction of the pre-cut tread pattern of the multi-composite tire in this utility model;

[0026] Figure 5 This is a schematic diagram of the pre-cut plate for the tread of the multi-composite tire in this utility model;

[0027] Figure 6 This is a schematic diagram of the finished three-composite tire tread obtained by this utility model.

[0028] Marked in the image:

[0029] 1. Pre-formed body;

[0030] 11. First end face; 12. Second end face; 13. Third end face;

[0031] 2. Top layer flow channel;

[0032] 21. Top runner inlet; 22. Top runner outlet;

[0033] 3. Middle layer flow channel;

[0034] 31. Inlet of the middle layer flow channel; 32. Outlet of the middle layer flow channel;

[0035] 4. Lower flow channel;

[0036] 41. Lower layer flow channel inlet; 42. Lower layer flow channel outlet;

[0037] 5. Mouth-shaped plate;

[0038] 51. Upper part of the lip-shape plate; 52. Lower part of the lip-shape plate;

[0039] 6. Tire tread;

[0040] 61. Tread compound; 62. Flange compound; 63. Base compound. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] As attached Figure 1-6 As shown, this utility model proposes a pre-groove pattern for a multi-composite tire tread, comprising:

[0045] The pre-ditch body 1 has multiple end faces. The pre-ditch body 1 is connected to the extruder flow channel through the first end face 11 to receive the fluid adhesive. The pre-ditch body 1 is connected to the die plate 5 through the second end face 12 to form a tire tread 6 with a predetermined cross-sectional shape.

[0046] A multi-layer composite flow channel is set on the pre-form body 1, including multiple flow channels. Each flow channel is provided with several glue inlets and several glue outlets. The glue outlets of different flow channels are provided with a preset interval width facing the glue outflow direction to facilitate the composite between different layers of glue.

[0047] Obviously, as shown in the attached document Figure 1 The tread pre-groove structure shown achieves precise compounding of multiple rubber layers through a multi-layer composite flow channel design. Each flow channel has an independent inlet and outlet, and the outlets of different layers are spaced at preset intervals, allowing different rubber materials to gradually fuse during extrusion. This avoids interface defects caused by direct mixing and effectively balances the extrusion pressure of each layer, reducing the problem of poor tread flatness caused by uneven pressure. At the same time, the layered compounding enhances the bonding force between the rubber layers of the tread, improving the tire's tear resistance and durability.

[0048] As an embodiment of this application, the first end face 11 is a wide end face, and the pre-grooving body 1 is in contact with the flow channel opening through the wide end face; the second end face 12 is a narrow end face, and the pre-grooving body 1 is in contact with the nozzle plate 5 through the narrow end face.

[0049] As attached Figure 5 As shown, the mouth plate 5 includes an upper mouth plate 51 and a lower mouth plate 52, and the upper mouth plate 51 and the lower mouth plate 52 are connected by a fastener.

[0050] The variable diameter design, with a wide inlet and a short outlet, optimizes the flow characteristics of the rubber compound. The wide inlet increases the contact area of ​​the fluid rubber, reducing pressure concentration at the extruder outlet; the narrow outlet increases the flow rate of the rubber compound through cross-sectional area reduction, forming a stable laminar flow state and avoiding bubble or delamination defects caused by turbulent flow. The wide inlet and short outlet design allows the rubber compound to undergo preliminary homogenization before entering the die plate 5, significantly improving the thickness uniformity of the tread section 6 and reducing the need for trimming processes in subsequent manufacturing.

[0051] Furthermore, the pre-form body 1 is also provided with a third end face 13, which is an inclined end face. The inclined end face is in contact with the mating end face of the die box. The matching design of the inclined end face and the die box achieves three-dimensional sealing and flow channel optimization. The cooperation between the inclined end face and the inclined surface of the die box not only improves the connection sealing performance and avoids leakage of high-pressure rubber, but also guides the rubber along the preset path by changing the flow channel angle, reducing dead angles in the flow channel. The structural design of the inclined end face can reduce the risk of rubber retention and prevent rubber scorching caused by local overheating. At the same time, it optimizes the flow channel pressure distribution and further improves the composite quality of the tread 6.

[0052] It should be further noted that the center lines of the lip-shaped box, the pre-lip-shaped body 1, and the lip-shaped plate 5 coincide with each other, which facilitates the installation and correction of the structure.

[0053] As an example of this application, see the attached document. Figure 1-4 As shown, the multi-layer composite flow channel includes a top layer flow channel 2, a middle layer flow channel 3, and a bottom layer flow channel 4. Each of the top layer flow channel 2, the middle layer flow channel 3, and the bottom layer flow channel 4 independently constitutes a complete fluid passage, and the inlet of each layer flow channel is located on the same radial plane.

[0054] The independent layered flow channels and coplanar glue inlet structure design enable precise control of multiple rubber compounds. The top, middle, and bottom flow channels 4 are completely independent, allowing different rubber compounds (such as tread compound 61, wing compound 62, and base compound 63) to be injected through independent pipelines, avoiding cross-contamination. The glue inlets being located on the same radial plane simplifies the connection structure between the extruder and the pre-form, reduces installation and debugging difficulty, and facilitates synchronous pressure adjustment of each layer of rubber compound, ensuring flow rate matching of each layer during the compounding process.

[0055] As an example of this application, see the attached document. Figure 1-2 As shown, the top layer flow channel 2 is located on the upper part of the pre-gutter body 1, including two top layer branch flow channels. The two top layer branch flow channels are symmetrically distributed along the center line of the pre-gutter body 1. The inner diameter of the top layer branch flow channels gradually decreases along the direction from the glue inlet to the glue outlet.

[0056] The tapered top-branch flow channel enables dynamic pressurization of the rubber compound. The structure, with its gradually decreasing inner diameter along the flow channel direction, allows the rubber compound to naturally pressurize during flow, gradually increasing the flow velocity and forming a dynamic equilibrium state of "laminar-turbulent-laminar flow." The tapered structure design also effectively eliminates stagnation zones of the rubber compound within the flow channel. Simultaneously, the symmetrically distributed dual-branch flow channels ensure symmetrical extrusion of the rubber compound at the crown of the tread, preventing tread deviation caused by unilateral pressure imbalances.

[0057] Furthermore, the top runner 2 is provided with a top runner inlet 21 and a top runner outlet 22. Obviously, the top runner inlet 21 is located at the beginning of the top runner 2, and the top runner outlet 22 is located at the end of the top runner 2.

[0058] As attached Figure 2 As shown, the top layer flow channel inlet 21 is a rectangular shape with rounded corners. The rounded corners design can prevent fluid accumulation and facilitate the flow of the colloid.

[0059] As attached Figure 1 As shown, the cross-section of the top layer flow channel outlet 22 is an irregular polygon with distinct boundaries. The irregular polygon can be composed of an upper rectangle, a middle right trapezoid, and a lower right trapezoid.

[0060] For example, the upper rectangle is 75cm*6cm, the middle right-angled trapezoid has a top edge width of 75mm, a bottom edge width of 55mm, and a height of 18mm, and the lower right-angled trapezoid has a top edge width of 55mm, a bottom edge width of 30mm, and a height of 7mm. The polygonal glue outlet formed by this is used to extrude the wing glue 62 of the composite tread 6.

[0061] It should be noted that the irregular polygonal rubber outlet enables a differentiated design for the crown of the tread 6. The cross-sectional shape, composed of a combination of rectangles and right-angled trapezoids, allows for precise allocation of rubber thickness according to the usage requirements of the tread 6: the upper rectangular area corresponds to the high-wear zone in the center of the tread 6, providing wear-resistant support; the middle right-angled trapezoidal transition area enhances tear resistance; and the lower trapezoidal area optimizes the interface with the base rubber 63. This structural design allows the tread 6 to achieve synergistic optimization of the composite tire tread 6 without increasing the amount of material used.

[0062] As an embodiment of this application, the middle layer flow channel 3 is symmetrical about the center line of the pre-form body 1, and the middle layer flow channel 3 is provided with a middle layer flow channel inlet 31 and a middle layer flow channel outlet 32.

[0063] As attached Figure 2 As shown, the glue inlet 31 of the middle layer flow channel is located at the starting end of the middle layer flow channel 3 and is rectangular in shape.

[0064] As attached Figure 1 and 3 As shown, the cross-section of the middle layer flow channel outlet 32 ​​is a polygon composed of two isosceles trapezoids at the upper and lower ends. For example, the upper isosceles trapezoid has a top edge width of 190mm, a bottom edge width of 230mm, and a height of 19mm; the lower isosceles trapezoid has a top edge width of 230mm, a bottom edge width of 120mm, and a height of 4mm, thereby forming the middle layer flow channel outlet 32 ​​for extruding the tread rubber 61 of the composite tread 6.

[0065] In the above embodiment, the double isosceles trapezoidal middle layer flow channel 3 strengthens the structural support of the tread 6, and provides lateral constraint on the rubber materials on both sides during the extrusion process of the tread 6, reducing the extrusion expansion deformation of the shoulder area. At the same time, the tapering characteristics of the trapezoidal flow channel can make the middle layer rubber material form a pre-compressed state before entering the die plate 5, enhancing the physical engagement with the upper and lower layers of rubber material and improving the overall peel strength of the composite tread 6.

[0066] As an example of this application, see the attached document. Figure 1-3 As shown, the lower flow channel 4 is located below the middle flow channel 3 and below the pre-gauge body 1.

[0067] The lower flow channel 4 includes a lower flow channel inlet 41 and a lower flow channel outlet 42. This is obvious, as shown in the attached diagram. Figure 2 As shown, the lower flow channel inlet 41 is rectangular; as attached Figure 1 As shown, the cross-section of the lower flow channel outlet 42 is concave. For example, the total width of the lower flow channel outlet 42 is 280mm, and the lower flow channel outlet 42 is used to extrude the base adhesive 63 of the composite tread 6.

[0068] Furthermore, the lower flow channel 4 is inclined downwards along the direction from the glue inlet to the glue outlet, with an inclination angle ranging from 10°. o -20 o The concave lower layer flow channel 4 can optimize the performance of the tread base 6. The concave cross section forms a reinforcing structure at the base of the tread 6. On the one hand, it balances the overall extrusion pressure by increasing the flow resistance of the rubber compound. On the other hand, it forms a stress dispersion zone in the shoulder area, improving the tire's impact resistance under complex road conditions, thereby further extending the service life of the shoulder area.

[0069] As an embodiment of this application, the preset interval width between the outlets of different flow channels facing the direction of colloid flow is 1.5-2.5 cm. Preferably, the preset interval width is 2 cm. The preset interval setting achieves an optimal balance between the compounding effect and production efficiency. Within this interval width range, it ensures that a sufficient molecular diffusion layer (approximately 0.5-1.0 mm) is formed at the interface of different rubber materials, while avoiding an increase in extrusion energy consumption due to excessively large intervals. Through limited simulation experiments, it has been verified that within this interval range, the shear stress distribution between the tread rubber layers is uniform, the interfacial bonding strength is improved by more than 30% compared to the traditional design, and the extrusion speed can be maintained in the efficient range of 1.2-1.5 m / min.

[0070] Compared with the prior art, the above embodiments have the following beneficial technical effects:

[0071] (1) This utility model uses a multi-layer composite flow channel. By introducing a tread pre-cut structure that matches the pattern, composite treads 6 suitable for different patterns can be extruded after combination, improving the wear resistance and tear resistance of treads 6. This solves the problems of low tire shoulder hardness and poor tear resistance in previous pre-cuts, thus forming a composite tire tread structure that meets performance requirements.

[0072] (2) This utility model extrudes the wing rubber 62 part of the composite tire tread 6 through the rubber outlet 22 of the top layer flow channel, the rubber outlet of the middle layer flow channel 3, the rubber outlet of the composite tire tread 6, the rubber 61 part of the composite tire tread 6, and the rubber outlet 42 of the bottom layer flow channel, the rubber 63 part of the base of the composite tire tread 6. The combination of multiple rubber materials improves the wear resistance of the shoulder of the tire tread 6 and the support of the shoulder, and solves the existing problems of uneven wear of the shoulder and dynamic circumferential cracks in the shoulder area.

[0073] The multi-layer composite flow channel includes a top layer flow channel 2, a middle layer flow channel 3, and a bottom layer flow channel 4. The design of each layer of flow channel facilitates the flow and compounding of different rubber compounds, resulting in a three-layer composite tread 6 with stable dimensions and less prone to shrinkage and deformation.

[0074] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A multi-composite tire tread pre-die, characterized in that, include: The pre-ditch body has multiple end faces. The pre-ditch body is connected to the extruder flow channel through the first end face to receive the fluid adhesive. The pre-ditch body is connected to the die plate through the second end face to form a tire tread with a predetermined cross-sectional shape. A multi-layer composite flow channel is disposed on the pre-form body, comprising multiple flow channels, each flow channel having several inlets and several outlets. The outlets of different flow channels are provided with a preset interval width facing the direction of glue flow to facilitate the composite of different layers of glue.

2. A multi-composite tire tread pre-die as defined in claim 1, wherein, The first end face is a wide end face, and the pre-grooving body is in contact with the flow channel opening through the wide end face; the second end face is a narrow end face, and the pre-grooving body is in contact with the nozzle plate through the narrow end face.

3. A multi-composite tire tread pre-die as defined in claim 2, wherein, The pre-form body is also provided with a third end face, which is an inclined end face, and the inclined end face is connected to the matching end face of the form box.

4. A multi-composite tire tread pre-die according to any one of claims 1-3, characterized in that, The multi-layer composite flow channel includes a top layer flow channel, a middle layer flow channel, and a bottom layer flow channel. Each of the top layer flow channel, the middle layer flow channel, and the bottom layer flow channel independently constitutes a complete fluid passage, and the glue inlet of each layer flow channel is located on the same radial plane.

5. A multi-composite tire tread pre-die as defined in claim 4, wherein, The top-level flow channel is located on the upper part of the pre-gutter body and includes two top-level branch flow channels. The two top-level branch flow channels are symmetrically distributed along the center line of the pre-gutter body. The inner diameter of the top-level branch flow channels gradually decreases along the direction from the glue inlet to the glue outlet.

6. A multi-composite tire tread pre-die as defined in claim 5, wherein, The cross-section of the top layer flow channel outlet is an irregular polygon with distinct boundaries. The irregular polygon can be composed of an upper rectangle, a middle right trapezoid, and a lower right trapezoid.

7. A multi-composite tire tread pre-die as defined in claim 5, wherein, The middle flow channel is symmetrical about the center line of the pre-gauge body, and the discharge port cross-section of the middle flow channel is a polygon composed of two isosceles trapezoids at the upper and lower ends.

8. A multi-composite tire tread pre-die according to claim 7, wherein, The lower flow channel is located below the middle flow channel and at the lower end of the pre-form body. The cross-section of the glue outlet of the lower flow channel is concave.

9. A multi-composite tire tread pre-die as defined in claim 1, wherein, The preset interval width is 1.5-2.5cm.

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