JP2001001037A - Production device of multilayer wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production device of a multilayer wire in which a die and a nipple are easily changed and temp. setting is easily performed. SOLUTION: A device is provided with an inner layer supply wheel 1 which is rotated in a prescribed direction around a rotation axis 1a apart from and orthogonal to the geometrical axial line of an extruded multilayer wire 10' and supplies an inner layer coating material 3 toward the axial line, an outer layer supply wheel 2 which interposes the axial line, is rotated around the other rotation axis 2a parallel to the rotation axis 1a in the same direction as the inner layer supply wheel 1 and supplies an outer layer coating material 4 toward the axial line, a die box 6 for inner layer which is inserted into the space encircled with the inner layer supply wheel 1 and the outer layer supply wheel 2 from the upstream of extrusion and accommodates a die for inner layer coating, and a die box 7 for outer layer which is inserted into the space encircled with the inner layer supply wheel 1 and the outer layer supply wheel 2 from the downstream of extrusion and accommodates a die for outer layer coating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a multilayer composite wire (multilayer composite material) in which an inner layer coating and an outer layer coating are continuously formed by extrusion, and in particular, exchange of dies and nipples is easy and temperature setting is possible. The present invention relates to an apparatus for easily manufacturing a multilayer composite wire.

[0002]

2. Description of the Related Art As a prior art, Japanese Patent Laid-Open Publication No.
An apparatus for manufacturing a composite pipe described in Japanese Patent Publication No. 2 will be described.

As shown in FIG. 2, in this composite pipe manufacturing apparatus, two drive wheels 33 and 34 having grooves 31 and 32 on the outer periphery are arranged so that their respective rotation shafts are pushed in a pushing direction (right in the drawing). Up and down across the geometrical line axis of the extruded composite pipe 35 at a distance of
Are located in Immediately below the drive wheel 33 and directly above the drive wheel 34, that is, closest to the line axis of each drive wheel, collecting chambers 36 and 37 are formed by an integral fixing tool 38. Projections 39 and 40 for closing the grooves 31 and 32 are formed on the fixing tool. The drive wheels 33 and 34 are individually driven by two motors (not shown). The rotation directions of the drive wheels 33 and 34 are opposite to each other.

[0004] Two kinds of rod-shaped metal materials (inner tube material F ₁ and outer tube material F ₂ ) are supplied to the grooves 31 and 32, and the respective metal materials are forcibly fed from the drive wheels 33 and 34 to the respective collecting chambers 36 and 37. By feeding, each of the collecting chambers 36 and 37 is filled with a plasticized metal, and a pipe can be manufactured and a coating layer can be formed with the plasticized metal.

[0005] First, the die 4 from the inner tube F ₁ is set chamber 36
The inner tube P ₁ made by the process of passing through the first and the mandrel 42, then the mandrel 4 outer tubing F ₂ from the collection chamber 37
3 and covered by the inner tube P ₁ of the surface outer tube P ₂ are formed in the process of passing through the die 44, by the inner pipe P ₁ and the outer tube P ₂ is extruded in the A direction coaxially, A composite tubing is manufactured.

In another prior art shown in FIG. 3, two sets of dies and nipples are incorporated in one die box 53 by providing the rotation shafts of two drive wheels 51 and 52 without shifting in the extrusion direction. In addition, each drive wheel 51,5
The rotation directions of 2 are opposite to each other. Each meeting room 54,5
The inlet to 5 is both downstream of the extrusion from the closest point of the drive wheels 51, 52 to the line axis. For this reason, each inlet and each collecting chamber are close to each other.

[0007]

According to the conventional composite pipe manufacturing apparatus shown in FIG. 2, since the drive wheels are individually driven by two motors, a motor and a speed reducer are provided for each drive wheel. This requires a large device, a large space, a large noise, and a complicated control circuit. For this reason, it is inevitable that the reliability decreases and the device cost increases. Further, since the wall thickness of the pipe is adjusted by controlling the rotation speed of the drive wheel, it is difficult to make fine settings for the wall thickness adjustment. Furthermore, this manufacturing apparatus is limited to the manufacture of composite tubing and cannot manufacture multilayer composites. Further, since the rotating shafts of the two drive wheels are displaced in the pushing direction, the forces acting on the fixed tool and the like are not symmetrical, and the design becomes difficult.

In the prior art shown in FIG. 3, it is very difficult to exchange dies and nipples when switching the product size. Further, the dies and nipples are very expensive due to the very complicated shape and assembly mechanism.

In the extrusion of the coating material, there is an extrusion temperature suitable for each coating material. However, in the prior art shown in FIGS. 2 and 3, since one die box is used, a temperature setting suitable for each coating material is used. Is very difficult to do.

Further, it is very difficult to adjust the extrusion pressure of each coating material to an extrusion pressure suitable for each coating material with one die box.

An object of the present invention is to solve the above-mentioned problems and to provide an apparatus for manufacturing a multi-layer composite wire in which dies and nipples can be easily replaced and the temperature can be easily set.

[0012]

In order to achieve the above object, the present invention relates to an apparatus for manufacturing a multilayer composite wire in which an inner coating and an outer coating are continuously formed by extrusion. An inner layer supply wheel rotated in a predetermined direction about a rotation axis orthogonal to the line axis at a distance from the line axis to supply the inner layer coating material toward the line axis, and another rotation parallel to the rotation axis across the line axis An outer-layer supply wheel that is rotated around the axis in the same direction as the inner-layer supply wheel and supplies the outer-layer coating material toward the linear axis, and from an upstream of extrusion into a space interposed between the inner-layer supply wheel and the outer-layer supply wheel. An inner layer die box that is inserted and accommodates a die for forming an inner layer coating, and is inserted from the downstream of the extrusion into the space between the inner layer supply wheel and the outer layer supply wheel and is externally inserted. Those having a containing a die for overmolding an outer layer die box.

[0013] An inlet for inflow of the inner layer coating material into the inner layer die box is disposed upstream of the extrusion of the inner layer supply wheel from the closest point to the line axis, and the inlet is disposed at the nearest point of the outer layer supply wheel to the line axis. An inflow port for allowing the outer layer coating material to flow into the outer layer die box may be arranged downstream of.

[0014] A heater may be housed in one or both of the inner layer die box and the outer layer die box.

[0015] A substantial center wire may be disposed on the wire axis, and the center wire may be run to extrude a multilayer composite wire including the center wire.

[0016]

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, in the multilayer composite wire continuous extruder according to the present invention, two drive wheels (hereinafter, also referred to as movable wheels) 1 and 2 are extruded from right to left in the figure. The multi-layered composite line is arranged vertically (not shown; the center wire occupies the line axis here) and vertically (the upper side in the figure is the upper side). In each of the movable wheels 1 and 2, the rotating shafts 1a and 2a are three-dimensionally orthogonal to the line axis, and these rotating shafts 1a and 2a are arranged at the same position in the extrusion direction. The lower movable wheel 1 is an inner layer supply wheel that is rotated counterclockwise to supply the inner layer coating material 3 toward the linear axis. The upper movable wheel 2 is an outer layer supply wheel rotated in a counterclockwise direction to supply the outer layer coating material 4 toward the linear axis. Each movable wheel 1, 2
May be supported by a cantilevered structure or a double-ended structure. Also, each movable wheel 1, 2
The number of grooves 5 may be one or two.

Two die boxes 6 and 7 are provided in a space between the upper and lower movable wheels 1 and 2. That is, the die box 6 inserted near the narrowest portion between the upper and lower movable wheels (the portion where a straight line connecting the rotating shafts 1a and 2a passes) from the upstream of the extrusion accommodates the die 8 and the nipple 9 for forming the inner layer coating. It is an inner layer die box. The inner layer die box 6 has a through hole 11 for allowing the center wire 10 to pass therethrough, and a collecting chamber 1 in which the coating material 3 is filled.
2. A projection 13 for closing the groove of the inner layer supply wheel and a hole 14 for accommodating a heater are formed. The die 8 is provided on the downstream side of the collecting room 12, and the nipple 9 is provided on the upstream side of the collecting room 12. The die box 7 inserted from the downstream of the extrusion to the vicinity of the narrowest portion between the upper and lower movable wheels is an outer layer die box containing the outer layer coating forming die 15 and the nipple 16. The outer-layer die box 7 has a through hole 17 for passing the multilayer composite wire 10 ′,
A collecting chamber 18 filled with the coating material, a projection 19 for closing the groove of the outer layer supply wheel, and a hole 20 for accommodating a heater are formed. The die 15 is provided on the downstream side of the collecting room 18, and the nipple 16 is provided on the upstream side of the collecting room 18.

A protrusion 13 of the inner layer die box 6 is provided at a front end facing the narrowest portion between the upper and lower movable wheels, and a rear end of the protrusion 13 has a collecting chamber 12 of the inner layer die box 6.
Is provided. As described above, the inflow port 21 for allowing the inner layer coating material 3 to flow into the collecting chamber 12 is connected to the inner layer supply wheel 1.
Is located upstream of the extrusion from the closest point to the line axis.
Further, a protrusion 19 of the outer layer die box 7 is provided at a front end facing the narrowest portion between the upper and lower movable wheels, and a collecting chamber 18 of the outer layer die box 7 is provided at a rear end of the protrusion 19. Thus, the outer layer coating material 4 is transferred to the collecting chamber 18.
Is located upstream of the extrusion from a point closest to the line axis of the outer layer supply wheel 2.

The through holes 11 of the two die boxes 6 and 7
17 is located on the linear axis. These through holes 11, 1
The center wire 10 is inserted into 7. A continuous supply source of the center wire 10 is provided on the right side outside the drawing, and a drum for winding and cooling the multi-layer composite wire 10 ′ is provided on the left side outside the drawing. By performing the extrusion, a multilayer composite wire 10 ′ having an inner layer coating and an outer layer coating formed around the center wire 10 can be continuously manufactured.

Holes 1 for heaters of two die boxes
Each of the heaters 4 and 20 accommodates an electric heating heater (not shown). Reference numeral 23 denotes a power cable for driving the heater, which is connected to a heating control device (not shown). The heating control device sets a temperature suitable for each coating material by each heater.

Next, the operation of the multilayer composite wire continuous extruder will be described.

The center wire 10 inserted into the inner layer die box 6 passes through the nipple 9 and enters the collecting chamber 12. The inner layer coating material 3 supplied from the inner layer supply wheel 1 via the inflow port 21 is filled in the collecting chamber 12 and coated on the center wire 10. The wire coated with the inner layer is formed into a predetermined size with a die 8, exits the inner layer die box 6, reaches the outer layer die box 7, and passes through the nipple 16 of the outer layer die box 7. Then, enter the collecting room 18. Here, since the outer layer coating material 4 supplied from the outer layer supply wheel 2 through the inflow port 22 is filled in the collecting chamber 18, the outer layer coating material 4 is coated on the inner layer coating. The wire coated with the inner layer coating and the outer layer coating is formed into a multilayer composite wire 1 by forming the outer layer coating into a predetermined size with a die 15.
It becomes 0 '. After exiting the outer layer die box 7, the multilayer composite wire 10 'is cooled, dried, and wound around a drum.

The thickness of each coating can be adjusted by changing the positions of the projections 13 and 19 provided on each of the die boxes 6 and 7. The thickness of each coating can also be adjusted by changing the extrusion pressure in each die box 6,7. In order to change the extrusion pressure, the pushing amount of the die boxes 6 and 7 may be changed.

In this multilayer composite wire continuous extruder,
The rotation directions of the two movable wheels 1 and 2 are the same. For this reason, the inlets 21 and 22 for supplying the coating material from the respective movable wheels 1 and 2 toward the line axis are separated upstream and downstream of the extrusion with respect to the nearest point of the respective movable wheels 1 and 2 to the line axis. Will be provided. This makes it possible to increase the mutual interval between the two inlets 21 and 22 and the two collecting chambers 12 and 18, and to divide the die box into two. Since the intervals between the collecting chambers 12 and 18 are wide, it is easy to set the temperature individually. Further, heaters for individually setting temperatures can be accommodated in the respective die boxes 6 and 7. The dies and nipples can also be accommodated in the respective die boxes 6 and 7.

In this multilayer composite wire continuous extruder, two types of coating materials 3 and 4 are simultaneously extruded by one extruder to produce a multilayer composite wire continuously in one step. Can be. The heating temperature of each of the die boxes 6 and 7 can be adjusted, and a temperature suitable for the coating materials 3 and 4 to be used can be set. In addition, since the pushing amount of each die box 6, 7 can be adjusted, the adjustment of the extrusion pressure becomes easy, and the thickness of the coating,
Adhesive strength can be adjusted. In addition, since the tool structure such as a die box can be simplified, each tool can be manufactured at low cost. Further, workability such as tool change is good, and the production speed and the production amount can be increased. Also, only one motor is required to drive the movable wheels 1 and 2.

The multilayer composite wire continuous extruder according to the present invention is, for example, a zinc-coated AS wire (center wire:
Steel, inner coated wire: aluminum, outer coated wire: zinc).

[0028]

The present invention exhibits the following excellent effects.

(1) An inner layer die box and an outer layer die box are separately formed, and these two die boxes are extruded into a space interposed between the inner layer supply wheel and the outer layer supply wheel and are separately arranged upstream and downstream. Therefore, the structure of each die box is simplified, and dies and nipples can be easily exchanged.

(2) Since the inner-layer die box and the outer-layer die box are separately formed, the temperature of each die box can be easily set.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along a line axis of a multilayer composite wire continuous extrusion apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along a line axis of a conventional composite pipe manufacturing apparatus.

FIG. 3 is a sectional view taken along a line axis of a conventional composite pipe manufacturing apparatus.

[Explanation of symbols]

 Reference Signs List 1 movable wheel (inner layer supply wheel) 1a, 2a rotation axis 2 movable wheel (outer layer supply wheel) 3 inner layer coating material 4 outer layer coating material 6 die box (inner layer die box) 7 die box (outer layer die box) 8,15 Dies 9,16 Nipple 10 Center wire 10 'Multi-layer composite wire 21,22 Inlet

Claims (4)

[Claims] 1. An apparatus for manufacturing a multilayer composite wire in which an inner layer coating and an outer layer coating are continuously formed by extrusion, wherein a predetermined axis is set around a rotation axis orthogonal to the geometrical axis of the extruded multilayer composite line at a distance. An inner layer supply wheel that is rotated in a direction to supply an inner layer coating material toward the line axis, and is rotated in the same direction as the inner layer supply wheel around another rotation axis parallel to the rotation axis across the line axis. An outer-layer supply wheel for supplying an outer-layer coating material toward the linear axis, and an inner-layer die containing a die for inner-layer coating molding inserted into the space between the inner-layer supply wheel and the outer-layer supply wheel from the upstream of the extrusion. A box, an outer die box containing a die for outer layer coating molding inserted from the downstream of the extrusion into a space sandwiched between the inner layer supply wheel and the outer layer supply wheel, and An apparatus for producing a multilayer composite wire, comprising: 2. An inflow port through which an inner layer coating material flows into the inner layer die box is provided upstream of the extrusion from the closest point of the inner layer supply wheel to the line axis, and the closest point of the outer layer supply wheel to the line axis. 2. The apparatus for manufacturing a multilayer composite wire according to claim 1, further comprising an inflow port through which an outer layer coating material flows into the outer layer die box downstream of the extrusion. 3. The apparatus according to claim 1, wherein one or both of the inner layer die box and the outer layer die box contains a heater. 4. A substantial center wire is disposed on the line axis,
The multilayer composite wire manufacturing apparatus according to any one of claims 1 to 3, wherein the multilayer composite wire including the central wire is extruded by running the central wire.