阅读说明：本技术 一种叠层结构钢帘线的生产方法 (Production method of laminated structure steel cord ) 是由 刘祥 马卫铭 张正裕 刘湘慧 曹恒祥 潘春东 王燕 潘振国 于 2020-04-27 设计创作，主要内容包括：本发明公开了一种叠层结构钢帘线的生产方法,包括如下步骤：将多根第一单丝集束成第一股,并将所述第一股弯曲变形集束成第一层股；将多根第二单丝和所述第一层股集束成第二层股；将多根第三单丝和所述第二层股集束编捻成外层单丝；将所述外层单丝经第一过线轮加捻后再经第二过线轮再次加捻成钢帘线；采用本发明中的一步法加捻成型制作钢帘线,省去传统制作方法中各层股两道加工工序,生产效率提升了70%左右。(The invention discloses a production method of a laminated structure steel cord, which comprises the following steps: bundling a plurality of first filaments into a first strand and bending-deforming the first strand into a first layer strand; bundling a plurality of second monofilaments and the first layer strand into a second layer strand; bundling and twisting a plurality of third monofilaments and the second layer strand into outer layer monofilaments; twisting the outer layer monofilament by a first thread passing wheel and then twisting the outer layer monofilament again by a second thread passing wheel to form a steel cord; the steel cord is manufactured by twisting and forming in one step, two processing procedures of each layer strand in the traditional manufacturing method are omitted, and the production efficiency is improved by about 70%.)

1. A method for producing a laminated structural steel cord, characterized by comprising the steps of:

bundling a plurality of first filaments into a first strand and bending-deforming the first strand into a first layer strand;

bundling a plurality of second monofilaments and the first layer strand into a second layer strand;

bundling and twisting a plurality of third monofilaments and the second layer strand into outer layer monofilaments;

and twisting the outer layer monofilament by the first thread passing wheel and then twisting the outer layer monofilament again by the second thread passing wheel to form the steel cord.

2. A method of producing a laminated structural steel cord as claimed in claim 1, wherein the number of said first monofilaments is 5.

3. A method of producing a laminated structural steel cord as claimed in claim 1, wherein the number of said second filaments is 8.

4. A method of producing a laminated structural steel cord as claimed in claim 1, wherein the number of said third filaments is 14.

5. A method of producing a laminated structural steel cord as claimed in claim 1, characterized in that said bundling a plurality of first filaments into a first strand is specifically: placing a plurality of first monofilaments on an outer paying-off table I, and bundling the first monofilaments into a first strand at a first bundling point A; wherein the first beam focusing point A is positioned on the left side of the outer pay-off table I.

6. A method of producing a laminated structural steel cord as claimed in claim 5, characterized in that said bundling of a plurality of second filaments and said first ply into a second ply is in particular: a plurality of second monofilaments are arranged on an outer pay-off table II, and the second monofilaments and the first strand are bunched into a second layer of strand at a second bunching point D through a monofilament distributing disc; the second beam concentration point D, the first beam concentration point A, the outer pay-off platform I and the outer pay-off platform II are sequentially arranged from left to right.

7. A method for producing a laminated structural steel cord as claimed in claim 6, wherein said bundling and twisting the plurality of third filaments and the second layer strand into outer layer filaments is specifically: a plurality of third monofilaments are arranged on an outer pay-off table III, and the third monofilaments and the second layer of strands are bunched and twisted into outer layer monofilaments at a third bunching point F through a monofilament distributing disc; the outer pay-off table III is located on the right side of the outer pay-off table II, and the third beam focusing point F is located on the left side of the second beam focusing point D.

8. The method for producing a steel cord with a laminated structure according to claim 7, wherein said twisting the outer layer filaments by the first passing wheel and then by the second passing wheel to form the steel cord comprises: and twisting the outer layer monofilaments by a U-shaped first wire passing wheel and then twisting the outer layer monofilaments again by a V-shaped second wire passing wheel to form the steel cord, wherein the second wire passing wheel is positioned on the left side of the first wire passing wheel, and the first wire passing wheel is positioned on the left side of the second beam focusing point D.

9. A method of producing a laminated structural steel cord as claimed in claim 1, wherein said first, second and third filaments each have a diameter of 0.15mm to 0.40 mm.

10. A method of producing a laminated structural steel cord as claimed in claim 1, wherein the lay lengths of said first layer strand, second layer strand and outer layer filament are the same, said lay length being 7.00mm to 30.00 mm.

Technical Field

The invention relates to the technical field of steel cords, in particular to a production method of a steel cord with a laminated structure.

Background

The steel cord for the radial engineering tire has a layered structure, different lay lengths (lay directions) among all layers of strands, twisting and forming by adopting a three-step method of an inward contraction type (outer paying-off) machine type and an outward contraction type (inner paying-off) machine type, and the three processes are independently produced and combined, so that the production cost is high.

Disclosure of Invention

The invention aims to provide a production method of a laminated structural steel cord so as to solve the problem of high production cost in the prior art.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a method for producing a laminated structural steel cord, comprising the steps of:

bundling a plurality of first filaments into a first strand and bending-deforming the first strand into a first layer strand;

bundling a plurality of second monofilaments and the first layer strand into a second layer strand;

bundling and twisting a plurality of third monofilaments and the second layer strand into outer layer monofilaments;

and twisting the outer layer monofilament by the first thread passing wheel and then twisting the outer layer monofilament again by the second thread passing wheel to form the steel cord.

Further, the number of the first monofilaments is 5.

Further, the number of the second monofilaments is 8.

Further, the number of the third monofilaments is 14.

Further, the bundling of the first plurality of filaments into a first strand is specifically: placing a plurality of first monofilaments on an outer paying-off table I, and bundling the first monofilaments into a first strand at a first bundling point A; wherein the first beam focusing point A is positioned on the left side of the outer pay-off table I.

Further, the bundling of the plurality of second monofilaments and the first layer strand into a second layer strand specifically comprises: a plurality of second monofilaments are arranged on an outer pay-off table II, and the second monofilaments and the first strand are bunched into a second layer of strand at a second bunching point D through a monofilament distributing disc; the second beam concentration point D, the first beam concentration point A, the outer pay-off platform I and the outer pay-off platform II are sequentially arranged from left to right.

Further, the bundling, weaving and twisting the plurality of third monofilaments and the second layer strand into outer layer monofilaments specifically comprises: a plurality of third monofilaments are arranged on an outer pay-off table III, and the third monofilaments and the second layer of strands are bunched and twisted into outer layer monofilaments at a third bunching point F through a monofilament distributing disc; the outer pay-off table III is located on the right side of the outer pay-off table II, and the third beam focusing point F is located on the left side of the second beam focusing point D.

Further, the twisting of the outer layer monofilament by the first thread passing wheel and then the second thread passing wheel into the steel cord is specifically as follows: and twisting the outer layer monofilaments by a U-shaped first wire passing wheel and then twisting the outer layer monofilaments again by a V-shaped second wire passing wheel to form the steel cord, wherein the second wire passing wheel is positioned on the left side of the first wire passing wheel, and the first wire passing wheel is positioned on the left side of the second beam focusing point D.

Further, the diameters of the first monofilament, the second monofilament and the third monofilament are all 0.15mm-0.40 mm.

Further, the first layer strand, the second layer strand and the outer layer monofilament have the same lay length, and the lay length is 7.00mm-30.00 mm.

According to the technical scheme, the embodiment of the invention at least has the following effects:

1. the steel cord is manufactured by twisting and forming in one step, two processing procedures of each layer strand in the traditional manufacturing method are omitted, and the production efficiency is improved by about 70%;

2. by adopting the method, the labor employment of workers is reduced by 60 percent; the occupied area is saved by 70 percent; the comprehensive manufacturing cost is reduced by 60 percent;

3. the strength grade of the steel cord produced by the method is increased by 15 percent; the fatigue performance is improved by 20 percent.

Drawings

FIG. 1 is a schematic view showing the arrangement of an apparatus used in a steel cord manufacturing method according to an embodiment of the present invention;

fig. 2 is a schematic view of the structural formation of a steel cord according to an embodiment of the present invention.

Wherein: 0. a first layer strand; 1. a second ply; 2. outer layer monofilaments; 3. and (5) winding the wire outwards.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in figures 1 and 2, the production method of the laminated structural steel cord improves the production efficiency, reduces the manufacturing cost, saves the floor area of a factory building, reduces the labor amount of personnel, has high strength grade and good fatigue resistance, and is generally used in mine, building and port projects.

Referring to fig. 1, the inside take-up (outside pay-off) type is a double twister operating principle of one-step twisting of a first layer strand 0, a second layer strand 1 and an outer layer monofilament 2.

Referring to fig. 1, an outer paying-off table I, an outer paying-off table II and an outer paying-off table III are sequentially placed from left to right, five first monofilaments are connected to the outer paying-off table I, 8 second monofilaments are connected to the outer paying-off table II, and fourteen third monofilaments are connected to the outer paying-off table III. The left side of the outer pay-off platform I is a first beam concentrating point A, the left side of the first beam concentrating point A is a point B, the left side of the point B is a monofilament distributing board point C, the left side of the point C is a second beam concentrating point D, the left side of the second beam concentrating point D is a monofilament distributing board point E, the left side of the point E is a third beam concentrating point F, the left side of the third beam concentrating point F is a U-shaped wire guide wheel point G, the left side of the point G is a V-shaped wire guide wheel point H, and a point J is arranged between the point G and the point H.

Referring to fig. 1, five first monofilaments of a first layer inner strand are placed on an outer pay-off table I, are formed and bundled into a first strand through a wire passing wheel at a first bundling point A, are bent and deformed after passing a point B to form intermittent forced reversal, and are bundled into a first layer strand 0.

Referring to fig. 1, eight second monofilaments in the middle strand of the second layer are placed on an outer pay-off table ii, and are bundled with the first layer strand at a second bundling point D into a second layer strand 1 through a C-point monofilament distribution plate.

Referring to fig. 1, the third monofilament in the outer layer 14 is placed on an outer pay-off table iii, and is bundled with the second layer strand at a third bundling point F through an E-point monofilament distribution plate to be braided and twisted into the outer layer monofilament 2 at one time.

Referring to fig. 1, since the point end F of the third beam-collecting point is fixed and does not rotate, and the point end G of the wire-passing wheel carries the outer layer monofilament 2 to rotate along with the rotating body, the point end G rotates because the point end F of the third beam-collecting point is fixed, and the first twisting is completed after the rotating body rotates for one circle; the H point end of the steel wire rotates, the J point end of the steel wire is fixed, and the second twisting is completed after the rotating body rotates for one circle.

Referring to fig. 1, an outer layer monofilament is formed by one-time weaving and twisting of the end of a point F of a third beam concentration point and passes through a point G 'U' -shaped wire passing wheel to complete a first twisting process, and passes through a point H 'V' -shaped wire passing wheel to complete a second twisting process, and the characteristics of a forced reverse-rotation laminated structure are realized through the point G 'U' -shaped wire passing wheel and the point H 'V' -shaped wire passing wheel, and the change process is shown in fig. 2(a → B → C), and the steel cord is formed in one step after passing through the point H.

Referring to fig. 1, the process principle and design concept are applicable to a structure of 5 × d (0.15 mm-0.40 mm) first monofilament, 8 × d (0.15 mm-0.40 mm) second monofilament, and 14 × d (0.15 mm-0.40 mm) third monofilament.

Referring to fig. 2, 5 first monofilaments of the first layer strand 0, 8 second monofilaments of the second layer strand 1 and 14 third monofilaments of the outer layer monofilament 2 are formed by one-time twisting.

Referring to fig. 2, the first layer strand 0, the second layer strand 1 and the outer layer monofilament 2 have three-layer structure steel cord characteristics.

Referring to fig. 2, the first layer strand 0, the second layer strand 1 and the outer layer monofilament 2 are gradually forced to reverse as shown in fig. 2B, and have uniform discontinuity characteristics.

Production with reference to fig. 2; the lay lengths of the first layer strand 0, the second layer strand 1 and the outer layer monofilament 2 are consistent, and the application range of the lay length size is 7.00mm-30.0 mm.

Referring to fig. 2, the first layer strand 0, the second layer strand 1 and the outer layer monofilament 2 are formed by one-time weaving and twisting, 1 outer winding filament 3 monofilament is added on the outermost layer, and the application range (0.15 mm-0.245 mm) of the outer winding filament 3 filament diameter is increased.

The present process and conventional production cost pair is as follows:

it will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.