JPH0214086A - Production of steel cord and apparatus therefor - Google Patents

Abstract

PURPOSE:To obtain the subject cord, having two wiry units arranged around a twisted wire group and good in rubber penetration ratio by simultaneously guiding three kinds of twisted wire groups or wiry units in one rotating body through specific passages. CONSTITUTION:Wiry units are divided into three kinds of a twisted wire group 21 delivered from a cradle 2 through one shaft center of a rotating body 1 to a shaft center on the opposite side while being rotated around the cradle, a wiry unit 20 delivered from the outside of the rotating body through one shaft center of the rotating body 1 to the shaft center on the opposite side while being rotated around the cradle and a wiry unit 19 delivered from the upper part of the cradle directly to the shaft center on the opposite side and guided. Twist is applied to the twisted wire group twice for one rotation of the rotating body without applying any twist or torsion to the other two wiry units themselves. Twist is applied to the other two wiry units of the twisted wire group once for one rotation of the rotating body.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method and apparatus for manufacturing steel cords used as rubber reinforcing materials for tires, conveyor belts, etc.

(Prior Art) This type of steel cord has conventionally been manufactured using a cylindrical strander type strander. Furthermore, as shown in Fig. 5 (a) to (d), conventional steel cord A (IX4
), B (IX5), C (3X3).

D (3+6) was mainly composed of wires in which the strands were in close contact with each other. And Figure 5 (A), (II)
Steel cord A with a single layer strand structure as shown in .

In B, the twisting process is a single step, while in other steel cords C and D, shown in Figure 5 (C) and (:), which have a multi-strand or multi-layer twist structure, the twisting process is a multiple process. It was manufactured.

However, in order to improve the quality and performance of rubber as a reinforcing material, some recent steel cords have a structure that allows rubber to penetrate into the interior of the steel cord. Furthermore, as a manufacturing method for steel cord, there is a method in which two types of twists can be imparted in the -step. (for example,
Japanese Patent Publication No. 57-193253 2 Special Publication No. 61-155
Publication No. 3, Special Publication No. 1554 of 1983, Special Publication of Publication No. 1981-
(See Publication No. 1555).

The method for manufacturing the above steel cord is to
Unlike the conventional one shown in Figure 5, which is twisted closely together (in order to have gaps between the strands, the twisted steel cord is divided into two groups with different types of twist, and these are separated into two groups. Steel cord E (IX2+
2) is shown in FIG. 6 as an example. By the way, in the above-mentioned conventional steel cord manufacturing method, since the twisting is done in the - step and with one rotating body, some of the wires are twisted twice. The rotating body is guided so as to be twisted, and the other linear bodies are guided so as not to be twisted, so that each of these two groups of linear bodies is twisted mutually, and the steel is Code is manufactured.

(Problem to be Solved by the Invention) However, in this conventional steel cord manufacturing method, two groups of wire bodies with different twists (twisted and untwisted) are twisted. Since the method of fitting is limited, there is a problem in that the cross section of the steel cord becomes very non-uniform in various parts in the longitudinal direction.

The present invention was made to solve the conventional problems, and the inventors have made the following points: 1. As a result of repeated research on the method of guiding a linear body in a rotating body, we have found that three types of twisted wire groups and linear bodies can be guided simultaneously in one rotating body, and the cross section is uniform and stable at each part in the longitudinal direction. Therefore, it is an object of the present invention to provide a steel cord manufacturing method and a manufacturing apparatus that can easily manufacture a steel cord whose quality is further improved than that of conventional steel cords.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides two types of linear bodies that are introduced into both axes of the rotary body from a feeding portion on a cradle inside the rotary body, and a linear body that is introduced outside the rotary body. Another type of linear body is introduced into the rotating body from the feeding part, and a plurality of linear bodies of one of the two types of linear bodies are simultaneously guided from the feeding part to one axis of the rotating body. The strands are guided around the rotating body, rotated around the cradle, and twisted while being guided through the opposite axis as a group of strands. The linear body is led out directly through the axis on the opposite side, and further, the linear body to be introduced into the rotating body is fed out from the external feeding section, guided around the rotating body through one axis of the rotating body, and rotated around the cradle. A method for producing a steel cord according to the first invention, in which the steel cord is led out through the shaft core on the opposite side and twisted together at the same time; A feeding section is provided on a cradle that is freely suspended inside the rotating body, and each part of the rotating body has one of the linear bodies fed out in two directions from the feeding section on the cradle. A plurality of linear members are guided through one axis of the rotating body and guided around the rotating body and guided through the opposite axis, and the other linear body is guided from above the rotating body from above the cradle. A guide member arranged so as to be guided directly through the axis on the opposite side, and a linear body of the feeding part outside the rotating body passed through one axis of the rotating body and guided around the rotating body to guide it directly through the axis on the opposite side. and a guide member disposed so as to be guided through the steel cord manufacturing apparatus of the second invention.

(Function) Since the present invention has the above-mentioned configuration, a group of stranded wires that are rotated around the cradle by rotating one axis of the rotating body from above the cradle and are fed out to the axis on the opposite side, and The wires are divided into three types and guided directly to the shaft on the opposite side, which is fed out to the shaft on the feeding side, and the twisted wire group is given two twists per rotation of the rotating body, and the other two The linear body itself is not twisted or twisted at all, and the twisted wire group and the other two linear bodies are twisted once per rotation of the rotating body. It is possible to manufacture a steel cord with a uniform cross section in the longitudinal direction in which two linear bodies are arranged around a group of wires.

(Example) Embodiments of the present invention will be described below based on the drawings.

In Figure 1, (1) is a rotating body for rotating a linear body around a cradle (2), (3) and (4) are feeding reels placed on the cradle, and (5) is a rotating body. A feed-out reel disposed outside the body, (6) a guide roller for feeding out the linear body from the feed-out reel, and (7).

(9), αω 1 time is the rotating body axis guide roller, (8),
αD is a guide roller on the circumference of the rotating body, α罎 is a voice, α( is a correction roller, a!9 is a take-up capstan, αω is a traverse roller, αη is a steel cord take-up reel,
αyang, αω, r2@ are linear bodies, (sha) are multiple linear bodies (
To) has been given a twist! 2! It is a group of lines.

The linear bodies Ql, Ql are guided from the feeding reel (3), (31) on the cradle (2) from one axis of the rotating body (1) through the rotating body axis guide roller (7), and guided around the circumference of the rotating body. The rollers (8) guide the rotating body around the cradle (2), and while twisting these linear bodies α barrels, the twisted wire group (2) returns to the rotating body on the opposite axis. At the same time, the linear body Ql is directly led out from the feed reel (4) on the cradle (2) through the shaft on the opposite side of the rotating body, and is also placed outside the rotating body. The linear body 01 is fed out from the feeding reel (5), passed from one axis of the rotating body (1) through the rotating body axis guide roller 01, and guided around the rotating body by the guide roller αυ on the circumference of the rotating body, and placed in a cradle. (2
) and guide it out of the rotating body together with the twisted wire group (2) and the linear body α through the rotating body shaft guide roller @ of the opposite shaft core, twisting them together, and taking them back to the capstan Q51. Take it up with the steel cord winding reel αη. The cross-sectional shape of the steel cord @ thus obtained is shown in FIG. Comparing this with the conventional steel cord E (FIG. 6), the steel cord (2) has a uniform cross-sectional shape at each portion in the longitudinal direction.

When the above-mentioned Steel Cord @ and the conventional Steel Cord E were twisted using the same type of equipment with the same number of strands and were twisted together, the results shown in the following table were obtained.

By the way, the linear body described in the present invention is not limited to a single strand, but may be a plurality of wires, or may be a twisted strand. It is also possible to stabilize the quality of the steel cord by providing over-twisting rollers or the like on the cradle or outside the rotating body.

Furthermore, as shown in FIG. 8, the steel cord twisted according to the present invention can be successively introduced into another twisting machine T, and can be twisted one more time. In this case, not only the productivity is greatly improved, but also it becomes possible to add a new linear body from outside the rotating body as shown in FIG.

(Effect of the invention) According to the present invention, three rotors can be used simultaneously in one rotating body.
Since the stranded wire group or linear body is guided, it is possible to easily manufacture a steel cord with a good rubber penetration rate and a uniform cross-sectional shape at each part in the longitudinal direction in a single process. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of the steel cord manufacturing apparatus of the present invention, FIG. 2 is a sectional view of the steel cord obtained by the present invention, and FIGS. 3 and 4 are other embodiments. A schematic configuration diagram of the steel cord manufacturing equipment shown in Fig. 5C4), ([+), (c), (,) and (1).
...Rotating body, (2) ...Cradle, [
3), +4), +5)...Feeding reel,
(6)... Guide roller, (7+, (9). 0 [, Hit... Rotating body axis guide roller, (81
, (11)...Rotating body circumferential guide roller, 0co...Voice, ao...Correcting roller, α
Death...Take-back capstan, Q6)...Trace roller, 0η...Steel cord S-take IJ-ru, α static, α9. (2Φ... linear body, (
)...Twisted wire group, (2)...Fig. 1 Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Scope of Claims] 1. Two types of linear bodies introduced into both axes of the rotating body from a feeding part on a cradle inside the rotating body, and another type of linear body introduced into the rotating body from a feeding part outside the rotating body. A plurality of linear bodies, one of the above two types of linear bodies, is simultaneously guided from the feeding section to one axis of the rotating body and guided around the rotating body, and rotated around the cradle. The twisted wire group is guided through the opposite shaft core while being twisted, and the other of the two types of wire bodies is directly led out from the feeding part through the opposite shaft core, and further, The linear body to be introduced into the rotating body is fed out from the external feeding section, guided around the rotating body through one axis of the rotating body, rotated around the cradle, guided through the axis on the opposite side, and simultaneously A method for manufacturing twisted steel cord. 2. A feeding section and a winding section are arranged on both sides of the outside of the rotating body,
A feeding section is provided on a cradle that is freely suspended inside the rotating body, and each part of the rotating body has a plurality of linear bodies, one of which is fed out in two directions from the feeding section on the cradle. A guide member arranged to guide the body through one axis of the rotating body and guide it around the rotating body and guide it through the axis on the opposite side, and the other linear body is guided from above the cradle to the opposite side of the rotating body. A guide member arranged so as to be guided directly through the axis of the rotating body, and a linear body of the feeding portion outside the rotating body is guided around the rotating body through one axis of the rotating body, and guided through the axis of the opposite side. A steel cord manufacturing device comprising a guide member arranged as shown in FIG.