A steel cord twisting system

Abstract

The present invention provides a steel cord twisting system for twisting steel cords, wherein the steel cords have a core wire and an outer winding wire twisted around the core wire, and the steel cord twisting system comprises: a first rotatable flywheel portion, wherein the first flywheel portion is used to release more than two outer winding wires at the same time and twist them into a whole outer winding wire bundle; a first twister, which is arranged at the rear side of the first flywheel portion, wherein the outer winding wire bundle passes through the first twister and is reversely twisted into a single outer winding wire; a second rotatable flywheel portion, which is arranged at the rear side of the first twister, wherein the second flywheel portion is used to release a single core wire and simultaneously twist the core wire and the outer winding wire from the first twister to obtain a steel cord. The present invention can compensate for the axial length of the steel cord by adjusting the wire release amount of the core wire, thereby ensuring that the core wire and the outer winding wire are consistent in axial length, thereby improving the stability of the final product structure.

Description

Technical Field

[0001] The invention relates to the technical field of steel cords, in particular to a steel cord twisting system. Background Art

[0002] Steel cord is a special-purpose fine steel strand or rope made of high-quality high-carbon steel with brass coating on the surface. It is mainly used for car tires, light truck tires, heavy truck tires, construction machinery tires, aircraft tires and other rubber product skeleton materials. The radial tire made of steel cord as reinforcement material has the advantages of long service life, high driving speed, puncture resistance, good elasticity, safety and comfort, and fuel saving.

[0003] At present, the 1+N type of steel cord is composed of a core wire and N outer winding wires wrapped around the core wire. During production, the 1+N steel cord is Figure 1 As shown, the core wire is first unwound and twisted, and then passed through a bundled wire die together with the outer winding wire and twisted through a flying disc. Since the twist pitch of the core wire and the outer winding wire are inconsistent, when the two are twisted at the same time, there is a difference in the shrinkage of the core wire and the outer winding wire. This is intuitively reflected in the inconsistent shortening length of the core wire and the outer winding in the axial direction. This process cannot be adjusted and compensated, resulting in defects and deficiencies in the stability of the final product structure. Summary of the invention

[0004] The present invention aims to avoid the shortcomings of the prior art and provides a steel cord twisting system capable of compensating for axial length.

[0005] The present invention solves the technical problem by adopting the following technical solution: a steel cord twisting system for twisting a steel cord, wherein the steel cord has a core wire and an outer winding wire twisted around the core wire, and the steel cord twisting system comprises:

[0006] A first flywheel part capable of rotating, the first flywheel part is used to release more than two outer winding wires at the same time and twist them into a whole outer winding wire bundle;

[0007] A first twister is arranged at the rear side of the first flywheel part, and the outer winding wire bundle passes through the first twister and is reversely twisted into a single outer winding wire;

[0008] A second rotatable flywheel part is arranged at the rear side of the first twister, and the second flywheel part is used to release a single core wire and simultaneously twist the core wire and the outer winding wire from the first twister to obtain a steel cord;

[0009] A second twister is arranged at the rear side of the second flywheel portion;

[0010] A traction part, arranged at the rear side of the second twister, and used for traction of the steel cord;

[0011] A length measuring part, arranged at the rear side of the traction part, and used for measuring the length of the steel cord;

[0012] The winding section is arranged at the rear side of the length measuring section, and is used for winding the steel cord.

[0013] In several embodiments, a plurality of first pay-off wheels are disposed in the first flywheel portion, and the first pay-off wheels are used to pay out the outer winding wires, and the plurality of the outer winding wires are gathered into a whole outer winding wire bundle after passing through the first wire bundler.

[0014] In several embodiments, a guide wheel is provided at each end of the first flywheel portion, and the guide wheel is used to guide the outer winding bundle to change direction, and the outer winding bundle is twisted at the guide wheel.

[0015] In several embodiments, a second pay-off wheel is disposed in the second flywheel portion, and the second pay-off wheel is used to pay out the core wire. A second wire bundler is disposed at the rear side of the second flywheel portion, and the core wire and the outer winding wire simultaneously enter the second wire bundler to be closed and twisted into a steel cord.

[0016] In several embodiments, the rotational speed of the second flywheel portion is twice the rotational speed of the first flywheel portion.

[0017] In several embodiments, a tension adjusting wheel is further provided between the length measuring portion and the winding portion, and the tension adjusting wheel is used to adjust the winding tension of the steel cord.

[0018] In several embodiments, the steel cord twisting system includes the following twisting method:

[0019] S1, twisting of the outer winding wire: controlling the first flywheel part to rotate, and the multiple first pay-off wheels inside the first flywheel part unwind at the same time, and the multiple outer winding wires unwound are simultaneously passed through the first bundler and then closed into a whole outer winding wire bundle, and the outer winding wire bundle passes through the first flywheel part and passes around the two guide wheels on both sides in turn, so that the outer winding wire bundle is twisted at the two guide wheels to obtain a twisted outer winding wire bundle;

[0020] S2, untwisting of the outer winding: the twisted outer winding bundle passes through the first twister, and after reverse untwisting, multiple separate outer windings are obtained again;

[0021] S3, twisting of steel cord: the second flywheel part rotates, the outer winding after untwisting moves to the outside of the second flywheel part, the second pay-off wheel in the second flywheel part is used to pay out the core wire, the core wire is located at the center of the outer winding wire, and the core wire and the outer winding wire are controlled to enter the second cable bundler at the same time to be closed and twisted into a steel cord;

[0022] S4, length adjustment: monitor the position of the second cable tie by manual or visual inspection, observe the length difference between the outer winding and the core wire of the steel cord at the second cable tie, if the length of the outer winding is greater than the length of the core wire, control the second pay-off wheel to increase the pay-off speed to supplement the length of the core wire to the same as the outer winding, if the length of the outer winding is less than the length of the core wire, control the second pay-off wheel to reduce the pay-off speed to reduce the length of the core wire to the same as the outer winding;

[0023] S5: After axial length adjustment and calibration, the steel cord passes through the second twister to eliminate torsional stress, and then passes through the traction part, length measuring part, tension adjustment wheel and winding part in sequence to be wound into the finished product.

[0024] The present invention has the following beneficial effects:

[0025] The present invention combines the first flywheel part with the second flywheel part, twists the outer winding wire through the first flywheel part to eliminate stress, and then unfolds it through the first twister to obtain a separate outer winding wire. The separate outer winding wire and the separate core wire are twisted in the second flywheel part to obtain a steel cord. Since the core wire and the outer winding wire are not combined in the second flywheel part, the axial length of the steel cord can be compensated by adjusting the wire release amount of the core wire, ensuring that the axial length of the core wire and the outer winding wire are consistent, thereby improving the stability of the final product structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are for illustrative purposes only of selected embodiments and do not represent all possible implementations, and should not be considered to limit the scope of the present invention.

[0027] Figure 1 The steel cord twisting system in the prior art is schematically shown;

[0028] Figure 2 The steel cord twisting system in this embodiment is schematically shown. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below. To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0031] The terms used herein are intended to explain the embodiments and are not intended to limit and / or define the present invention.

[0032] like Figure 1 As shown, this type of steel cord twisting system first twists and unwinds the core wire in flywheel A, then enters flywheel B, and is combined with the four outer windings at point C through a wire bundle mold, and finally twisted at point D. Since the core wire and the outer winding are combined together before point D, the axial length is uneven when twisting at point D, and it cannot be adjusted, which makes it easy for the steel cord structure to be damaged.

[0033] like Figure 2 As shown, the steel cord twisting system provided in this embodiment is mainly composed of a first flywheel part 10, a first twister 20, a second flywheel part 30, a second twister 40, a traction part 50, a length measuring part 60, a tension adjustment wheel 70 and a winding part 80 which are arranged in sequence. This steel cord twisting system is used for the production of 1+N type steel cords, that is, a steel cord structure consisting of a core wire 1 and N outer winding wires wound around the core wire 1.

[0034] Specifically, the first flywheel part 10 and the second flywheel part 30 are both conventional flywheel structures capable of self-rotation, and the twisting action of the steel cord is achieved through the self-rotation motion.

[0035] Among them, four first pay-off wheels 11 are arranged in the first flywheel part 10, and a first cable bundler 13 is arranged at the exit position of the front end thereof. The first pay-off wheel 11 is used to pay out the outer winding wire 2. The four outer winding wires 2 are gathered into a whole outer winding wire bundle after passing through the first cable bundler 13, and are twisted at two symmetrically arranged guide wheels 12 on the front and rear sides of the first flywheel part 10, that is, two twisting amounts are completed, and the forward direction of the outer winding wire bundle is changed through the guide wheel 12.

[0036] Among them, the first twister 20, that is, the internal twister, is arranged at the rear side of the first flywheel part 10. After the outer winding bundle formed by the first flywheel part 10 passes through the first twister 20, it is reversely twisted into a single outer winding 2.

[0037] Among them, the second flywheel part 30 is arranged on the rear side of the first twister 20, and a second pay-off wheel 31 is arranged in the second flywheel part 30. The second pay-off wheel 31 is used to pay out the core wire 1. A second cable bundler 32 is arranged on the rear side of the second flywheel part 30. At this time, the outer winding wire 2 that has become a single wire again passes through the outer surface of the second flywheel part 30 at even intervals. The core wire 1 and the outer winding wire 2 enter the second cable bundler 32 at the same time, close together and are twisted at this position to become a steel cord.

[0038] Since the first flywheel part 10 twists the wire at two positions, and the second flywheel part 30 twists the wire at only one position of the second cable tie 32 , the rotation speed of the second flywheel part 30 needs to be twice that of the first flywheel part 10 to maintain balance.

[0039] The second twister 40, namely the external twister, is arranged at the rear side of the second flywheel portion 30, and the second twister 40 is used to eliminate stress of the steel cord passing therethrough.

[0040] The traction part 50 is arranged at the rear side of the second twister 40, and the traction part 50 is used to pull the steel cord.

[0041] The length measuring part 60 is arranged at the rear side of the traction part 50, and the length measuring part 60 is used to measure the length of the steel cord, such as a meter.

[0042] The tension adjusting wheel 70 is located between the length measuring part 60 and the winding part 80 . The winding tension of the steel cord can be adjusted by changing the position of the tension adjusting wheel 70 .

[0043] Furthermore, the winding section 80 is disposed at the rear side of the length measuring section 60 , and the steel cord is wound through the winding section 80 .

[0044] The present invention, when being produced, is mainly composed of the following steps:

[0045] First, the outer winding wire 2 is twisted: the first flywheel part 10 is controlled to rotate, and multiple first pay-off wheels 11 inside the first flywheel part 10 unwind at the same time, and the multiple outer winding wires 2 unwound are simultaneously inserted into the first bundler and then closed into a whole outer winding wire bundle, and the outer winding wire bundle passes through the first flywheel part 10 and passes around the two guide wheels 12 on both sides in turn, so that the outer winding wire bundle is twisted at the two guide wheels 12 to obtain a twisted outer winding wire bundle, thereby eliminating the stress of the outer winding wire 2.

[0046] Next is the untwisting of the outer winding wire 2: the twisted outer winding wire bundle passes through the first twister 20, and after reverse untwisting, a plurality of separate outer winding wires 2 are obtained again.

[0047] Next comes the twisting of the steel cord: the second flywheel portion 30 rotates, and the outer winding wire 2 after untwisting moves to the outside of the second flywheel portion 30. The second pay-off wheel 31 in the second flywheel portion 30 is used to pay out the core wire 1, which is located at the center of the outer winding wire 2. The core wire 1 and the outer winding wire 2 are controlled to enter the second cable bundler 32 at the same time, be closed and twisted into a steel cord.

[0048] Next is the length adjustment: monitor the position of the second cable tie 32 through manual or visual inspection, and observe the length difference between the outer winding 2 and the core wire 1 in the steel cord at the second cable tie 32. If the length of the outer winding 2 is greater than the length of the core wire 1, control the second pay-off wheel 31 to increase the pay-off speed to supplement the length of the core wire 1 to be consistent with the outer winding 2. If the length of the outer winding 2 is less than the length of the core wire 1, control the second pay-off wheel 31 to reduce the pay-off speed to reduce the length of the core wire 1 to be consistent with the outer winding 2. In this way, the structural stability of the steel cord product can be guaranteed.

[0049] The next step is winding: the steel cord after axial length adjustment and calibration passes through the second twister 40 to eliminate torsional stress, and then passes through the traction part 50, the length measuring part 60, the tension adjustment wheel 70 and the winding part 80 in sequence to be wound into a finished product.

[0050] The illustrated examples of the present invention, the embodiments and special forms of the representations have been shown and described in detail in the drawings and the foregoing description, and should also be considered to be illustrative rather than restrictive. The description of special features in one embodiment does not mean that those special features are necessarily limited to that one embodiment. The features of one embodiment can be used in combination with the features of other embodiments, which can be understood by those of ordinary skill in the art, whether or not explicitly described in this way. Exemplary embodiments have been shown and described, and all changes and improvements fall into the spirit of the present invention and are expected to be protected.

Claims

1. A steel cord twisting system for twisting a steel cord, wherein the steel cord comprises a core wire and an outer winding wire twisted around the core wire, characterized in that: The steel cord twisting system comprises: A first flywheel part capable of rotating, the first flywheel part is used to release more than two outer winding wires at the same time and twist them into a whole outer winding wire bundle; A first twister is arranged at the rear side of the first flywheel part, and the outer winding wire bundle passes through the first twister and is reversely twisted into a single outer winding wire; A second rotatable flywheel part is arranged at the rear side of the first twister, and the second flywheel part is used to release a single core wire and simultaneously twist the core wire and the outer winding wire from the first twister to obtain a steel cord; A second twister is arranged at the rear side of the second flywheel portion; A traction part, arranged at the rear side of the second twister, and used for traction of the steel cord; A length measuring part, arranged at the rear side of the traction part, and used for measuring the length of the steel cord; A winding section, arranged at the rear side of the length measuring section, and used for winding the steel cord; A second pay-off wheel is arranged in the second flywheel part, and the second pay-off wheel is used to pay out the core wire. A second wire bundler is arranged at the rear side of the second flywheel part. The core wire and the outer winding wire enter the second wire bundler at the same time, are closed and twisted into a steel cord, and the position of the second wire bundler is monitored by manual or visual inspection, and the length difference between the outer winding wire and the core wire in the steel cord at the second wire bundler is observed. If the length of the outer winding wire is greater than the length of the core wire, the second pay-off wheel is controlled to increase the pay-off speed to supplement the length of the core wire to be consistent with the outer winding wire. If the length of the outer winding wire is less than the length of the core wire, the second pay-off wheel is controlled to reduce the pay-off speed to reduce the length of the core wire to be consistent with the outer winding wire. A plurality of first pay-off wheels are arranged in the first flywheel part, and the first pay-off wheels are used to pay out the outer windings, and the plurality of the outer windings are gathered into a whole outer winding bundle after passing through the first bundler; A guide wheel is disposed at each end of the first flywheel part, and the guide wheel is used to guide the outer winding bundle to change direction, and the outer winding bundle is twisted at the guide wheel; The rotation speed of the second flywheel part is twice the rotation speed of the first flywheel part.

2. A steel cord twisting system according to claim 1, characterized in that: A tension adjusting wheel is also arranged between the length measuring part and the winding part, and the tension adjusting wheel is used for adjusting the winding tension of the steel cord.

3. A steel cord twisting system according to claim 2, characterized in that: The following twisting methods are included: S1, twisting of the outer winding wire: controlling the first flywheel part to rotate, and the multiple first pay-off wheels inside the first flywheel part unwind at the same time, and the multiple outer winding wires unwound are simultaneously passed through the first bundler and then closed into a whole outer winding wire bundle, and the outer winding wire bundle passes through the first flywheel part and passes around the two guide wheels on both sides in turn, so that the outer winding wire bundle is twisted at the two guide wheels to obtain a twisted outer winding wire bundle; S2, untwisting of the outer winding: the twisted outer winding bundle passes through the first twister, and after reverse untwisting, multiple separate outer windings are obtained again; S3, twisting of steel cord: the second flywheel part rotates, the outer winding after untwisting moves to the outside of the second flywheel part, the second pay-off wheel in the second flywheel part is used to pay out the core wire, the core wire is located at the center of the outer winding wire, and the core wire and the outer winding wire are controlled to enter the second cable bundler at the same time to be closed and twisted into a steel cord; S4, length adjustment: monitor the position of the second cable tie by manual or visual inspection, observe the length difference between the outer winding and the core wire of the steel cord at the second cable tie, if the length of the outer winding is greater than the length of the core wire, control the second pay-off wheel to increase the pay-off speed to supplement the length of the core wire to the same as the outer winding, if the length of the outer winding is less than the length of the core wire, control the second pay-off wheel to reduce the pay-off speed to reduce the length of the core wire to the same as the outer winding; S5: After axial length adjustment and calibration, the steel cord passes through the second twister to eliminate torsional stress, and then passes through the traction part, length measuring part, tension adjustment wheel and winding part in sequence to be wound into the finished product.

Images