Straightener for flat structure steel cord production

Abstract

The invention discloses a straightener for production of a flat structure steel cord. The straightener comprises a mold frame; the first group of straightening roller wheels comprises a plurality of first straightening roller wheels which are rotationally connected in the mold frame, the plurality of first straightening roller wheels are arranged oppositely in a staggered manner in an upper row and a lower row, and the groove profile of the first straightening roller wheels is V-shaped or U-shaped; the second group of straightening roller wheels comprises a plurality of second straightening roller wheels which are rotationally connected in the mold frame, the plurality of second straightening roller wheels are arranged oppositely in a staggered manner in the upper row and the lower row, and the second straightening roller wheels are groove-free; the third group of straightening roller wheels comprises a plurality of third straightening roller wheels which are rotationally connected in the mold frame, the plurality of third straightening roller wheels are arranged oppositely in a staggered manner in the upper row and the lower row, and the groove profiles of the third straightening roller wheels are V-shaped; wherein the second group of straightening rollers are arranged between the first group of straightening rollers and the third group of straightening rollers. The flat structure steel cord can be stably produced, and periodic overturning is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of steel cords, and in particular relates to a straightener for producing flat structure steel cords. Background Art

[0002] Steel cord, as a reinforcement material for radial tires, has a significant impact on tire performance and service life. The prerequisite for steel cord to play a reinforcing role in the tire is effective bonding with the tire rubber, forming a composite. In the early days of radial tires, little attention was paid to early failure and the nature of failure. However, with the development of technology and advancements in the tire industry, competition among various companies has become increasingly fierce, and consumers and customers have become less and less tolerant of premature cord delamination and breakage in tires. This has forced the tire industry to improve tire performance, and as a crucial component of the tire's skeleton material, steel cord performance improvements are also imminent.

[0003] Compared to conventional structural steel cord, flat steel cord offers greater openness. After vulcanization, the rubber permeability is higher, preventing the formation of enclosed cavities within the cord. This allows for cleaner air discharge and reduces the likelihood of premature corrosion of the steel cord during tire use. Given the advantages of flat structural steel cord, the production of this structure presents a significant challenge for the industry. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a straightener for producing flat structural steel cords, which can stably produce flat structural steel cords without periodic flipping.

[0005] To solve the above technical problems, the present invention is implemented by adopting the following solutions: The present invention provides a straightener for flat structure steel cord production, comprising: mold base; The first set of straightening rollers includes a plurality of first straightening rollers rotatably connected to the mold frame, the plurality of first straightening rollers are arranged in upper and lower rows and staggered relative to each other, and the grooves of the first straightening rollers are V-shaped or U-shaped; The second group of straightening rollers includes a plurality of second straightening rollers rotatably connected to the mold frame, the plurality of second straightening rollers are arranged in upper and lower rows and staggered relative to each other, and the second straightening rollers are non-grooved; A third set of straightening rollers includes a plurality of third straightening rollers rotatably connected to the mold frame, wherein the plurality of third straightening rollers are arranged in an upper and lower rows and are staggered and opposed to each other, and the groove of the third straightening rollers is V-shaped; The second group of straightening rollers is arranged between the first group of straightening rollers and the third group of straightening rollers, and the diameter d of the second straightening rollers satisfies 0.5T≤πd / 4≤T, where T is the twist pitch of the flat structure cord.

[0006] Furthermore, the groove depth of the V-groove is H=0.70~0.95D, where D is the diameter of the steel cord before flattening.

[0007] Furthermore, the groove width L of the V-groove is 2H.

[0008] Furthermore, the groove width K of the U-shaped groove is 1.1~1.25D, where D is the cord diameter before flattening.

[0009] Furthermore, it also includes: The push rod is arranged below the mold frame, can be extended and retracted up and down and abuts against the rotating unit where the lower row of straightening rollers are located, and the rotating unit where the lower row of straightening rollers are located is slidably connected to the mold frame.

[0010] Furthermore, there are at least 10 first straightening rollers.

[0011] Furthermore, there are at least three second straightening rollers.

[0012] Furthermore, there are at least 10 third straightening rollers. Beneficial effects

[0013] The present invention guides the steel cord to the second group of straightening rollers without grooves through the first group of straightening rollers to produce flat structural steel cord. Finally, the flat structural steel cord is limited by the third group of straightening rollers with V-grooves and is transmitted without periodic flipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a flat structure steel cord straightener provided by an embodiment of the present invention; Figure 2 This is a schematic structural diagram of a V-groove straightening roller in a straightener for flat structure steel cord production provided by an embodiment of the present invention; Figure 3 This is a schematic structural diagram of a U-groove straightening roller in a straightener for flat structure steel cord production provided by an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a second straightening roller in a straightener for flat structure steel cord production provided by an embodiment of the present invention; In the figure: 1. mold frame; 2. first set of straightening rollers; 3. second set of straightening rollers; 4. third set of straightening rollers; 5. ejector rod; 6. second straightening roller. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Example 1

[0016] like Figures 1 to 4 As shown, this embodiment provides a straightening device for the production of flat structural steel cord, which consists of a mold frame 1, a first group of straightening rollers 2, a second group of straightening rollers 3 and a third group of straightening rollers 4. The first group of straightening rollers 2 consists of a number of first straightening rollers rotatably connected to the mold frame 1, and the first straightening rollers are divided into upper and lower rows and staggered and opposed to each other, and the groove of the first straightening rollers is V-shaped or U-shaped; the second group of straightening rollers 3 consists of a number of second straightening rollers rotatably connected to the mold frame 1, and the second straightening rollers are divided into upper and lower rows and staggered and opposed to each other, and the second straightening roller 6 has no groove; the third group of straightening rollers 4 consists of a number of third straightening rollers rotatably connected to the mold frame 1, and the third straightening rollers are divided into upper and lower rows and staggered and opposed to each other, and the groove of the third straightening roller is V-shaped; wherein, the second group of straightening rollers 3 is arranged between the first group of straightening rollers 2 and the third group of straightening rollers 4. The straightener guides the steel cord to the second set of straightening rollers 3 without grooves through the first set of straightening rollers 2 to produce flat structural steel cord. Finally, the flat structural steel cord is limited by the third set of straightening rollers 4 with V-grooves and is transmitted out without periodic flipping.

[0017] Specifically, the diameter d of the second straightening roller satisfies 0.5T≤πd / 4≤T, where T is the lay pitch of the flattened steel cord. The V-groove depth H is 0.70-0.95D, the V-groove width L is 2H, where D is the diameter of the steel cord before flattening. The U-groove width K is 1.1-1.25D, where D is the diameter of the steel cord before flattening.

[0018] In addition, there are at least 10 first straightening rollers, at least 3 second straightening rollers 6, and at least 10 third straightening rollers. The upper row of straightening rollers is rotatably connected to the mold frame 1 in a fixed position, while the lower row of straightening rollers is rotatably connected to the mold frame 1 in an upward and downward movable manner. The lower row of straightening rollers and their rotating units (including rotating frames, rotating shafts and other similar rotating structures) are integrally connected to the mold frame 1 in an upward and downward sliding manner. A top rod 5 is provided under the mold frame 1. The top rod 5 can be extended and retracted up and down and abut against the rotating unit where the lower row of straightening rollers are located, thereby lifting or lowering the lower row of straightening rollers without affecting the rotation of the lower row of straightening rollers, thereby realizing flexible adjustment of the spacing between the upper and lower rows of straightening rollers, and facilitating the production of flat structural steel cords. Example 2

[0019] To produce 5×0.30 flat structure steel cord, the cord twist pitch T is 15 mm, and the diameter D of the cord before flattening treatment is 0.82 mm. In order to produce 5×0.30 flat structure steel cord, the straightener for flat structure steel cord production described in Example 1 is used, wherein the groove shape of the first group of straightening rollers 2 and the third group of straightening rollers 4 are both V-shaped, and the V-groove H size is 0.7 mm. The roller diameter d of the second group of straightening rollers 3 is 15 mm. Example 3

[0020] 4×0.38 flat steel cords were produced with a cord lay pitch T of 18 mm. The diameter D of the cord before flattening was 0.84 mm. To produce the flat 4×0.38 steel cords, the straightener for producing flat steel cords described in Example 1 was used. The first set of straightening rollers (2) had a U-shaped groove with a U-groove K dimension of 1.0 mm. The third set of straightening rollers (4) had a V-shaped groove with a V-groove H dimension of 0.7 mm. The second set of straightening rollers (3) had a roller diameter (d) of 15 mm. Example 4

[0021] 4×0.225 flat steel cord with a lay pitch T of 12 mm was produced. The diameter D of the cord before flattening was 0.54 mm. To produce the flat 4×0.225 steel cord, the straightener for flat steel cord production described in Example 1 was used. The first and third straightening roller sets 2 and 4 had V-shaped grooves, with a V-groove H dimension of 0.4 mm. The second straightening roller set 3 had a roller diameter d of 10 mm.

[0022] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A straightener for flat structural steel cord production, characterized in that: include: mold base; The first set of straightening rollers includes a plurality of first straightening rollers rotatably connected to the mold frame, the plurality of first straightening rollers are arranged in upper and lower rows and staggered relative to each other, and the grooves of the first straightening rollers are V-shaped or U-shaped; The second group of straightening rollers includes a plurality of second straightening rollers rotatably connected to the mold frame, the plurality of second straightening rollers are arranged in upper and lower rows and staggered relative to each other, and the second straightening rollers are non-grooved; A third set of straightening rollers includes a plurality of third straightening rollers rotatably connected to the mold frame, wherein the plurality of third straightening rollers are arranged in an upper and lower rows and are staggered and opposed to each other, and the groove of the third straightening rollers is V-shaped; The second group of straightening rollers is arranged between the first group of straightening rollers and the third group of straightening rollers, and the diameter d of the second straightening rollers satisfies 0.5T≤πd / 4≤T, where T is the twist pitch of the flat structure cord.

2. The straightener for flat structural steel cord production according to claim 1, characterized in that: The depth of the V-groove is H=0.70~0.95D, where D is the diameter of the steel cord before flattening.

3. The straightener for flat structural steel cord production according to claim 2, characterized in that: The width of the V-groove is L=2H.

4. The straightener for producing flat structural steel cord according to claim 1, characterized in that: The width of the U-groove is K=1.1~1.25D, where D is the cord diameter before flattening.

5. The straightener for flat structural steel cord production according to claim 1, characterized in that: Also includes: The push rod is arranged below the mold frame, can be extended and retracted up and down and abuts against the rotating unit where the lower row of straightening rollers are located, and the rotating unit where the lower row of straightening rollers are located is slidably connected to the mold frame.

6. The straightener for producing flat structural steel cord according to claim 1, characterized in that: There are at least 10 first straightening rollers.

7. The straightener for producing flat structural steel cord according to claim 1, characterized in that: There are at least three second straightening rollers.

8. The straightener for flat structural steel cord production according to claim 1, characterized in that: The number of the third straightening rollers is at least 10.

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