Steel cord joint structure

Abstract

The utility model provides a kind of steel wire calendered cord joint structure. Including the connecting portion of the tail part steel cord of connecting first steel cord and the head part steel cord of second steel cord, the tail part steel cord of first steel cord and the head part steel cord of second steel cord are placed in overlap to constitute overlapping area;The connecting portion is the composite layer of the overlapping area steel cord of partial length or all length through vulcanization. The connecting portion includes two rows of steel cord;The gap between the steel cord and the external wrapping vulcanization layer of steel cord are fixedly connected between the vulcanization layer and steel cord. The utility model reduces manual operation, to save time and manpower, improve efficiency. In the utility model, the connecting portion needs little overlapping length to connect two batches of steel cord, to reduce waste, further save cost.

Description

Technical Field

[0001] This utility model belongs to the field of tire manufacturing, and specifically relates to a steel wire rolled cord joint structure. Background Technology

[0002] Steel cord calendering is a critical process in tire production, impacting tire quality and significantly reducing production costs. A row of steel wires arranged in a row forms steel cord, which is then calendered to form a complete steel cord fabric. Currently, when changing the type (specification) of each roll of calendered steel cord, the uncalendered steel cord at the end of the previous roll (after calendering) needs to be connected to the head of the next roll (not yet calendered into a steel cord fabric). Then, the previous roll on the production line can be pulled by the joint to move the next roll, allowing for continuous calendering. After the entire process is completed, the joint portion needs to be cut and discarded, creating waste material. In the current process, the steel cord at the joint is bundled together, resulting in a large amount of waste steel cord and increasing production costs. Summary of the Invention

[0003] This utility model provides a steel wire rolled cord joint structure that reduces the length of the joint portion, thereby reducing waste.

[0004] The purpose of this utility model is achieved in the following way: a steel wire rolled cord joint structure, including a connecting part that connects the tail steel cord of the first steel cord and the head steel cord of the second steel cord, wherein the tail steel cord of the first steel cord and the head steel cord of the second steel cord are placed overlappingly to form an overlapping area; the connecting part is a composite layer formed by vulcanizing part or all of the overlapping area steel cord.

[0005] The connecting part includes upper and lower rows of steel cords; the gaps between the steel cords and the outer surface of the steel cords are wrapped with a vulcanized layer, and the vulcanized layer and the steel cords are fixedly connected.

[0006] The length of the connecting part is between 100 mm and 300 mm.

[0007] The thickness of the connecting part is 10 mm; the width is 900 mm.

[0008] The first steel cord is the portion of the previous bolt of steel cord that has not been rolled into steel cord fabric; the second steel cord is the next bolt of steel cord that has not been rolled.

[0009] Compared to existing technologies, this invention reduces manual operations, thereby saving time and manpower and improving efficiency. Furthermore, the connecting part in this invention requires very little overlap to connect two batches of steel cord, thus reducing waste and further saving costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the connector structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the internal structure of the connecting part of this utility model.

[0012] Among them, 1 is the first steel cord, 2 is the second steel cord, 3 is the connecting part, 30 is the vulcanized layer, and 4 is the steel cord fabric. Detailed Implementation

[0013] In this utility model, unless otherwise expressly specified and limited, the technical terms used in this application shall have the ordinary meaning understood by those skilled in the art. Terms such as "connected," "linked," "fixed," and "set" shall be interpreted broadly, referring to fixed connections, detachable connections, or integral connections; direct connections or indirect connections via an intermediate medium; mechanical connections or electrical connections. Unless otherwise expressly specified and limited, "above" or "below" a second feature may mean that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," or "over" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Relational terms such as "first," "second," etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms used in the description, such as “center,” “lateral,” “longitudinal,” “length,” “width,” “thickness,” “height,” “front,” “rear,” “left,” “right,” “up,” “down,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “axial,” “radial,” “circumferential,” “clockwise,” and “counterclockwise,” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Figure 1-2As shown, a steel wire rolled cord joint structure includes a connecting part 3 that connects the tail steel cord of the first steel cord 1 and the head steel cord of the second steel cord 2. The tail steel cord of the first steel cord 1 and the head steel cord of the second steel cord 2 are placed overlappingly to form an overlapping area. The connecting part 3 is a composite layer formed by vulcanizing part or all of the overlapping area steel cord. The joint structure of this utility model can be vulcanized on an existing vulcanizing machine. Compared with the existing manual binding method for connecting the head and tail steel cords, this utility model reduces manual operation, thereby saving time and manpower and improving efficiency. In addition, the binding method requires the removal of a large amount of unrolled waste material after vulcanization, while the connecting part 3 in this utility model only needs a small overlap length to connect two batches of steel cord fabric, thereby reducing waste material and further saving costs. For example, in one batch of joint structures, the waste material between two connected steel cords is reduced from about 3 meters to 1 meter, thereby saving costs.

[0015] Specifically, the connecting part 3 includes two rows of steel cords; the space between the two rows of steel cords is filled with rubber, which undergoes a chemical cross-linking reaction under temperature and time conditions to form a three-dimensional network structure of elastic material, namely vulcanized layer 30, which fuses the steel wires into the middle of the rubber elastomer for fixed connection.

[0016] In this invention, it is not limited whether the upper row of steel cords and the lower row of steel cords specifically belong to the first steel cord 1 or the second steel cord 2. Specific operation (preferred): First, lay a layer of rubber sheet on the vulcanizing machine. Then, lay the steel cords from the previous batch on the rubber sheet, that is, place the tail end of the first steel cord 1 in the lower row. Then, lay another layer of rubber sheet on the steel cords. Next, lay the head end of the next batch of steel cords, that is, the second steel cord 2, on the upper row. Lay another layer of rubber sheet, and start the vulcanizing machine for vulcanization.

[0017] Specifically, the length of the connecting part 3 is between 100 mm and 300 mm. In a specific embodiment, the length of the connecting part 3 can be 200 mm. Other lengths can also be set according to the width of the flat vulcanizing machine, all of which are within the protection scope of this utility model.

[0018] Preferably, the thickness of the connecting portion 3 is 10 mm, and the width is 900 mm. The thickness and width of the connecting portion 3 are determined as needed. This data is only one embodiment. Other thicknesses and widths are also within the protection scope of this utility model.

[0019] Preferably, the film between the upper and lower rows of steel cords in the connecting part 3 has a thickness of 1.5 mm for each layer, a length of 200 mm, and a width of 900 mm. The thickness, length, and width of the film in the connecting part 3 are determined as needed. This data is only one embodiment. Other thicknesses, lengths, and / or widths are also within the protection scope of this utility model.

[0020] Furthermore, the first steel cord 1 is a portion (tail cord) of the previous bolt of steel cord 4; the second steel cord 2 is the next bolt of unrolled steel cord (head cord). In actual operation, the previous bolt of steel cord is rolled to form steel cord 4, and the remaining tail cord (not rolled to form steel cord) is placed in the vulcanizing equipment. Then, the head of the next bolt of unrolled steel cord is also overlapped and placed in the vulcanizing equipment; through vulcanization, the steel wires are fused into the rubber elastomer, thereby forming the vulcanized layer 30. The vulcanization process is prior art and will not be described in detail.

[0021] In this invention, the vulcanizing machine for vulcanizing steel cord can utilize existing flat vulcanizing machines, such as electro-vulcanizing devices. Electro-vulcanization offers advantages such as rapid heating, high energy utilization, and precise temperature control, effectively shortening vulcanization time, improving production efficiency, and reducing energy consumption. The pressure of the electro-vulcanizing device can be provided by a hydraulic station, ensuring stable and sufficient pressure output. The hydraulic cylinder pressure is precisely adjusted via an overflow valve, allowing for precise setting and adjustment of the pressure according to different vulcanization process requirements, ensuring the stability and accuracy of pressure during vulcanization, resulting in a more uniform and reliable vulcanization effect. The upper and lower heating plates of the vulcanizing device can be heated synchronously, and a temperature detection function is provided to monitor the heating plate temperature in real time. Through a precise temperature control system, temperature fluctuations can be controlled within a minimal range, ensuring stable vulcanization under the set temperature conditions, greatly improving the stability of the vulcanization temperature. The vulcanization temperature can be set between 160-190℃ as needed, and the vulcanization time is approximately 3-6 minutes. The electro-vulcanizing device and vulcanization process are existing technologies and will not be described in detail further.

[0022] In practice: The remaining tail of the steel cord from the previous roll of steel cord 4 is placed in the vulcanizing equipment without being rolled. Then, the head of the next roll of unrolled steel cord is also placed in the vulcanizing equipment. Rubber layers are added to the bottom, middle, and top layers. After vulcanization in the vulcanizing machine, under predetermined temperature, time, and pressure conditions, the rubber layer undergoes a chemical cross-linking reaction, transforming the originally linear rubber layer into a three-dimensional network elastic material, fusing the steel wires within the rubber elastomer, thus forming the vulcanized layer 30. The vulcanization process is existing technology and will not be described in detail. After vulcanization, the next roll of steel cord is drawn to a four-roll calender to produce steel cord 4. At the winding point, the middle connecting part 3 and the unrolled steel cord are cut off.

[0023] The technical features of the embodiments described above can be combined in any way, and as long as there is no contradiction in the combination of these technical features, they should all be considered within the scope of this specification. Without departing from the overall concept of this utility model, any equivalent substitutions or modifications made to the technical solution of this utility model, as well as any changes and improvements, should also be considered within the protection scope of this utility model.

Claims

1. A steel wire rolled cord joint structure, comprising a connecting portion for connecting the tail section of a first steel cord and the head section of a second steel cord, characterized in that: The tail section of the first steel cord and the head section of the second steel cord are placed overlapping each other to form an overlapping area; the connecting part is a composite layer formed by vulcanizing part or all of the overlapping area steel cord.

2. The steel wire rolled cord joint structure according to claim 1, characterized in that: The connecting part includes upper and lower rows of steel cords; the gaps between the steel cords and the outer surface of the steel cords are wrapped with a vulcanized layer, and the vulcanized layer and the steel cords are fixedly connected.

3. The steel wire rolled cord joint structure according to claim 2, characterized in that: The length of the connecting part is between 100 mm and 300 mm.

4. The steel wire rolled cord joint structure according to claim 2, characterized in that: The thickness of the connecting part is 10 mm; the width is 900 mm.

5. The steel wire rolled cord joint structure according to claim 2, characterized in that: The first steel cord is the portion of the previous bolt of steel cord that has not been rolled into steel cord fabric; the second steel cord is the next bolt of steel cord that has not been rolled.

Images