JP4263076B2 - Method and apparatus for manufacturing steel wire rubber composite material - Google Patents

Description

  The present invention relates to a method and apparatus for manufacturing a steel wire rubber composite material, and more specifically, a vibration is applied to a plurality of stranded steel wires to suppress breakage of the steel wires due to twisting disturbance, and between the steel wires. The present invention relates to a method and apparatus for manufacturing a steel wire rubber composite material that can efficiently infiltrate a rubber material into the gap.

  Conventionally, when a composite material is manufactured by coating a stranded wire steel wire with a rubber material, a tension of about 29 N to 40 N is applied in a state where a single wire or a plurality of stranded wire steel wires are arranged in parallel, and a rubber extruder In addition, the rubber material was coated with a calendar device composed of a plurality of rollers. However, when the rubber is coated between the stranded steel wires, depending on the stranded structure of the steel wire used, a disturbance of the wire strand called “twisting back” occurs upstream of the inlet of the extrusion head.

  By this “twisting back”, one wire strand is lifted from the stranded steel wire, and the lifted strand is caught in the wire alignment hole of the steel wire alignment guide (die insert). If the rubber coating is continued in this state, there is a problem that the steel wire breaks in a short time.

  Possible causes of this “twisting back” are, for example, that the wire strand moves when the rubber material is coated because the tension of the stranded steel wire is low, and the rubber pressure in the extrusion head is high.

  On the other hand, it is possible to change from the conventional 3 + 9 wire structure shown in FIG. 7 to the 3 + 8 structure which is a sparse structure shown in FIG. 8 so that the rubber easily penetrates between the strands of the steel wire S during rolling of the rubber material. (For example, refer to Patent Document 1).

  However, in the rolling method using the conventional calendar apparatus 1 shown in FIG. 9, the rubber sheet W is formed in advance by the calender rolls 2a, 2b, 2c, and 2d, and the steel wire S is formed in a sandwich structure with the rubber sheet W. Therefore, by making the rotation speed of the calendar rolls 2a to 2d coincide with the feed speed of the steel wire S, no shear force acts between the rubber and the wire.

  On the other hand, when the rubber material is coated by an extruder, the rubber material is coated so as to be dragged by the wire in the extrusion head, and thus a strong shearing force is generated between the wire and the rubber material. Thereby, it is considered that the wire strand is moved by the shearing force in the loosely twisted wire as in the 3 + 8 structure described above, and the twist is returned.

  Therefore, in order to suppress the “twisting back” of the steel wire, (a) the wire tension is increased to suppress the movement of the wire element, and (b) the inside of the extrusion head to reduce the shearing force between the steel cord rubbers. It was found from experiments and the like that the effect is great when the rubber pressure is reduced.

  However, when considering the point that the 3 + 8 structure is used as described above in order to improve the permeability of the rubber material between the wire wires of the steel cord as described above, the wire tension is increased or the shearing force between the wire rubbers is increased. Is kept low, the permeability of the rubber is lowered, and the effect of changing to the 3 + 8 structure cannot be expected.

As described above, in the conventional method of manufacturing a composite material by coating a stranded wire steel wire with a rubber material, the steel wire is prevented from being “twisted back” and the permeability of the rubber material between the wire strands is improved. There was a problem that it was difficult to do things at the same time.
JP-A-4-163020

  The present invention pays attention to such conventional problems, and can produce a steel wire rubber composite material that can suppress the “twisting back” of the steel wire and improve the permeability of the rubber material between the wire strands. It is an object to provide a method and apparatus thereof.

  In order to achieve the above object, the present invention provides a method for producing a steel wire rubber composite material according to the present invention immediately before coating a rubber material by applying a constant tension to a stranded steel wire and transporting it at a predetermined speed. The gist is to apply a vibration to the stranded steel wire with a mechanical vibration device to coat the rubber material.

  It is also possible to coat the stranded steel wire with a rubber material in a state in which the stranded steel wire is aligned in parallel with a single wire or a plurality of stranded steel wires, and the stranded wire steel wire is coated by extruding the rubber material with a rubber extruder. .

  In this manner, by applying a constant tension to the stranded steel wire and carrying it with a mechanical vibration device on the stranded steel wire immediately before coating the rubber material by conveying it at a predetermined speed, It is possible to suppress “twisting back” of the steel wire and improve the permeability of the rubber material between the wire strands.

  The steel wire rubber composite material manufacturing apparatus according to the present invention is provided with a mechanical vibration device for applying vibration to the stranded steel wire just before the rubber material coating processing device during the stranded wire steel wire conveyance process. This is the gist. The stranded wire steel wires are a single wire or a group of stranded wire steel wires arranged in parallel, and the mechanical vibration device applies vibration to the stranded wire steel wires in the vertical direction by rotational driving of a motor. It consists of rotational vibration means. Furthermore, a rubber extruder is used as the coating processing apparatus.

  With this configuration, higher pressure in the head can be applied to stranded steel wire, which is more likely to break due to twisting disturbances, when coating rubber material. Since the composite material can be manufactured, and the apparatus stop time due to the breakage of the stranded steel wire can be eliminated, the productivity can be improved.

  In the present invention, as described above, a constant tension is applied to the stranded wire steel wire, and the stranded wire steel wire is loaded with a mechanical vibration device immediately before the rubber material is coated by being conveyed at a predetermined speed. By coating the rubber material, it is possible to suppress the “twisting back” of the steel wire and to improve the permeability of the rubber material between the wire strands.

  Moreover, in the steel wire rubber composite material manufacturing apparatus of the present invention, a mechanical vibration device for applying vibration to the stranded steel wire is installed immediately before the rubber material coating apparatus during the stranded steel wire conveyance process. Therefore, higher pressure in the head can be applied to stranded steel wire, which is more likely to break due to twisting disturbance when coating the rubber material, making it possible to produce a composite material coated with a good rubber material. In addition, since the apparatus stop time due to the breakage of the stranded steel wire can be eliminated, the productivity can be improved.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.

  FIG. 1 shows a front view of a production apparatus for carrying out a method for producing a steel wire rubber composite material according to the present invention. The production apparatus for a steel wire rubber composite material comprises a stranded steel wire S (this embodiment). Then, a creel stand 4 in which a plurality of reels 3 around which a 3 + 8 structure shown in FIG. 8 is wound is rotatably arranged, a mechanical vibration device 5 for applying vibration to a stranded steel wire W, and an extrusion. An extruder 7 having a head 6, a cooling drum device 8 having three cooling drums 8a for feeding steel wire rubber-coated steel wire rubber composite material G, and three dancer rolls 9a Winding composed of a dancer device 9 for adjusting the tension with a winding drum 10a for winding the steel wire rubber composite material G and a liner winding drum 10b It is composed of a location 10.

  The creel stand 4 has a plurality of reels 3 on a movable carriage 11 (in this embodiment, a total of 50 vertical, 5 vertical, 10 horizontal, but not limited to this embodiment). 6 is rotatably arranged, and a plurality of guide rollers 12 for guiding the steel wires S unwound from the reels 3 and a ceramic wire through which the steel wires S are inserted as shown in FIG. A wire guide plate 14 formed of an iron plate or the like provided with a plurality of guide holes 13 is installed.

  As shown in FIGS. 2 and 3, the mechanical vibration device 5 installed between the creel stand 4 and the extruder 7 is provided with a steel wire S aligned with a wire guide plate 14 by a rotational drive of a motor 15. On the other hand, it is composed of rotational vibration means 16 for applying vibration in the vertical direction.

  The rotational vibration means 16 has a pair of left and right disk-shaped amplitude adjusting plates 20a and 20b, which rotatably support both end shaft portions 19 of the free rollers 18a and 18b, mounted on the rotational drive shaft 17 of the motor 15 in parallel. On the side surfaces of the amplitude adjusting plates 20a and 20b, a plurality of long holes 21 for adjusting the mounting positions of the both end shaft portions 19 of the free rollers 18a and 18b are formed radially toward the center.

  Accordingly, when adjusting the amplitude of the rotational vibration means 16 in the cantilever state, the position of the shafts 19 on both ends of the free rollers 18a and 18b is adjusted along the long hole 21, so that the motor 15 is rotated by the rotational drive. The drive shaft 17 swings in the vertical direction, and the steel wire S that contacts the free rollers 18a and 18b also vibrates in the vertical direction.

  The mechanical vibration device 5 is not limited to the rotational vibration means 16 as described above, and a commercially available ball vibrator or the like can also be used. As shown in FIGS. 4 and 5, the extruder 7 provided with the extrusion head 6 aligns a plurality of steel wires S in the extrusion head 6 and has a wire alignment tool 22 (including a wire alignment hole 22a). A predetermined pressure (in this embodiment, a head pressure of 110 kg is used), the number of steel wires S and the wire strands are used. The rubber material Wx (which is arbitrarily set depending on the diameter or the like) is coated on the steel wire S through the rubber flow path 25.

  Then, the steel wire rubber composite material G, in which a plurality of steel wires S are covered with rubber, is alternately wound around the three cooling drums 8a of the cooling drum device 8, and then the three wire elements of the dancer device 9 are wound. The tension is adjusted by the dancer roll 9a, and the liner R unwound from the liner unwinding drum 10b is interposed so as to be wound around the winding drum 10a of the winding device 10.

  In the present invention, as described above, just before the rubber material Wx is coated on the steel wire S having the 3 + 8 structure by the extruder 7, the plurality of steel wires S are applied to the plurality of steel wires S with the predetermined amplitude by the rotational vibration means 16 of the mechanical vibration device 5. By applying the vibration, the steel wire S can be prevented from being locally rubbed with the wire alignment hole 22a of the wire alignment tool 22, and the strands lifted by twisting can be prevented from being caught by the wire alignment tool 22. By intermittently increasing the wire tension between the cooling drum device 8 and the dancer device 9, it is possible to increase the permeability of the rubber material Wx between the wire strands while suppressing the twist back of the steel wire S. It is.

It is a front view of the manufacturing apparatus for enforcing the manufacturing method of the steel wire rubber composite material which implemented this invention. It is a front view of the rotational vibration means of the mechanical vibration apparatus implemented by this invention. It is an AA arrow side view of FIG. It is an expanded sectional view from the BB arrow direction of the extrusion head of FIG. It is an expanded sectional view of the CC arrow direction of the extruder of FIG. It is a front view of the wire guide plate formed with the iron plate etc. which provided the guide hole. It is sectional drawing of the strand wire steel wire of 3 + 9 structure. It is sectional drawing of the strand wire steel wire of 3 + 8 structure. It is explanatory drawing of the conventional calendar apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Calendar apparatus 2a, 2b, 2c, 2d Calender roll W Rubber sheet S Steel wire 3 Reel 4 Creel stand 5 Mechanical vibration apparatus 6 Extrusion head 7 Extruder 8 Cooling drum apparatus 8a Cooling drum 9 Dancer apparatus 9a Dancer Roll 10 Winding device 10a Winding drum 10b Liner unwinding drum 11 Cart 12 Guide roller 13 Guide hole 14 Wire guide plate 15 Motor 16 Rotating vibration means 17 Rotating drive shaft 18a, 18b Free roller 19 Both ends shaft portion 20a, 20b Amplitude adjustment Plate 21 Long hole 22 Wire alignment tool 22 (die insert)
22a Wire alignment hole 23 Die throat 24 Screw head 25 Rubber flow path G Steel wire rubber composite material R Liner Wx Rubber material

Claims (7)

  In a manufacturing method of a steel wire rubber composite material, in which a stranded wire steel wire conveyed at a predetermined speed is continuously manufactured while being coated with a rubber material, a constant tension is applied to the stranded wire steel wire and the stranded wire steel wire is conveyed at a predetermined speed. A method of manufacturing a steel wire-rubber composite material, wherein the rubber material is coated by applying vibration to the stranded steel wire with a mechanical vibration device immediately before coating the rubber material.   The manufacturing method of the steel wire rubber composite material of Claim 1 which coat | covers a rubber material in the state with which the said strand wire steel wire was arranged in parallel with the single wire or multiple pieces.   The method for producing a steel wire rubber composite material according to claim 1 or 2, wherein a rubber material is extruded and coated on the stranded steel wire by a rubber extruder. During transport step strands steel wire for conveying giving constant tension to the strand steel wire, the steel wire rubber composite material comprising providing a coating apparatus of a rubber material covering the rubber material into the twisted steel wires In manufacturing equipment,
An apparatus for producing a steel wire rubber composite material, wherein a mechanical vibration device for applying vibration to a stranded wire steel wire is installed immediately before the rubber material coating apparatus in the process of conveying the stranded steel wire.   The apparatus for producing a steel wire rubber composite material according to claim 4, wherein the stranded steel wire is a single wire or a group of stranded steel wires arranged in parallel.   6. The steel wire rubber composite according to claim 4, wherein the mechanical vibration device is constituted by rotational vibration means for applying vibration in a vertical direction to a stranded steel wire by rotational driving of a motor. Material production equipment.   The apparatus for producing a steel wire rubber composite material according to claim 4, 5 or 6, wherein the coating processing apparatus is a rubber extruder.

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