JPH04344822A - Two-wheel type continuous extruding device - Google Patents

Abstract

PURPOSE:To obtain the two-wheel type continuous extruding device which can adjust easily supply pressure of an upper and a lower covering stocks, generates no uneven thickness in a covering layer of an obtained composite wire, and can straighten easily the eneven thickness state even in the case uneven thickness is generated. CONSTITUTION:A shoe block angle adjusting means for adjusting a fixed angle of shoe blocks 12a and 12b is provided. As for this showe block angle adjusting means, for instance, that which has wedge-like members 20a and 20b provided so as to be freely movable in the horizontal direction, and on the other hand, forms inclined parts 23a and 23b corresponding to the wedge-like members in the shoe blocks, and executes a position adjustment so as to move the wedge-like members in the horizontal direction in a state abutting on the inclined parts is also available. Also, as for this shoe block angle adjusting means, that which has a position adjusting member having a projecting spherical surface provided so as to be freely movable in the horizontal direction, and on the otherhand, forms a recessed spherical surface corresponding to the projecting spherical surface in the shoe block, and moves the projecting spherical surface in the horizontal direction in a state abutting on the recessed spherical surface is also available.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wheel continuous extrusion device, and more particularly to an improved shoe block position adjustment mechanism.

0002

2. Description of the Related Art Conventionally, there has been a two-wheel type continuous extrusion apparatus for manufacturing a composite wire by coating a core wire with a coating material by extrusion processing, for example, an apparatus having the structure shown in FIG. 3. This extrusion device includes a pair of rotating wheels 10a and 10b each having grooves 11a and 11b formed on the outer peripheral surface, shoe blocks 12a and 12b provided corresponding to the rotating wheels 10a and 10b, and grooves 11a and 11b. The abutments 14a and 14b are provided to close the abutments 14a and 14b. Further, this extrusion device is provided with a stand (not shown) that fixes the rotating wheel and the shoe block, and the shoe block is positioned with respect to this stand.

[0003] When manufacturing a composite wire using this extrusion device, the core wire 17 is fed in the extrusion direction indicated by the arrow while being gripped by nipples 13a and 13b provided on shoe blocks 12a and 12b. On the other hand, the covering materials 18a and 18
b is the groove 11a and 1 of the rotating wheels 10a and 10b.
1b, and merges with the core wire 17 in the collection chamber 15. The grooves 11a and 11b are connected to the abutments 14a and 1
4b, the covering materials 18a and 1
8b is pressurized and is extruded while being covered with the core wire 17 when passing through the die 16 together with the core wire 17, thereby obtaining a composite wire 19.

0004

[Problem to be Solved by the Invention] In the conventional extrusion device as described above, it is necessary for the shoe block to be accurately positioned vertically with respect to the stand, but in reality, these tools are Since processing and assembly tolerances are taken into account during processing, a certain positioning error may occur from the beginning. In addition, gaps between the tools may occur at several locations due to wear and the like occurring during extrusion, and the center of the core wire may not be set on the center line between the upper and lower rotating wheels. Under these conditions, the shoe block usually becomes slightly lower than the center height due to its own weight, and the running height of the core wire becomes relatively high. As a result, a problem arises in that the lower coating layer of the composite wire obtained by extrusion becomes thicker, so-called uneven thickness, and the quality of the manufactured composite wire deteriorates.

[0005] The above thickness deviation depends on the positioning of tools such as shoe blocks before starting extrusion processing, and in order to reduce the thickness deviation, it is necessary to position the shoe block with extremely high accuracy, which reduces work efficiency. was bad. In addition, if an uneven thickness exceeding the standard value is detected during extrusion work,
It was necessary to interrupt the extrusion operation and reconfigure the tool set. In addition, when uneven thickness occurs, surface defects are likely to occur in the manufactured composite wire, and even if the amount of uneven thickness is within the allowable range, it is unfavorable in terms of the quality of the manufactured composite wire. , which led to a decline in the pass rate for the combined route. Furthermore, when uneven thickness occurs, wire drawing troubles tend to occur during the wire drawing process, which also causes a decrease in the pass rate.

[0006] As a countermeasure for the case where uneven thickness occurs due to imbalance between the supply amounts of the upper and lower coating materials as described above, indirect methods such as changing the supply amounts of the upper and lower coating materials can be considered. However, with such indirect methods, the amount of burrs generated cannot be predicted and adjustment is extremely difficult.

Therefore, an object of the present invention is to be able to easily adjust the supply pressure of the upper and lower coating materials, to prevent uneven thickness from occurring in the coating layer of the obtained composite wire, and to prevent uneven thickness from occurring even if uneven thickness occurs. An object of the present invention is to provide a two-wheel type continuous extrusion device that can be easily corrected.

[0008]

[Means for Solving the Problems] The present invention comprises a pair of upper and lower rotating wheels and a shoe block corresponding to each of the pair of rotating wheels, and a core wire and a covering material are coated by extrusion pressure to form a composite material. A two-wheel type continuous extrusion device for manufacturing wire is provided with shoe block angle adjusting means for adjusting the fixing angle of the shoe block.

The angle adjustment means includes, for example, a wedge-shaped member movable in the horizontal direction, and the shoe block is formed with an inclined portion corresponding to the wedge-shaped member, and the wedge-shaped member is brought into contact with the inclined portion. The fixing angle of the shoe block may be adjusted by moving the shoe block horizontally in this state. Further, this angle adjustment means includes a position adjustment member having a convex spherical surface that is movable in the horizontal direction, and a concave spherical surface corresponding to the convex spherical surface is formed on the shoe block, and the convex spherical surface is formed on the shoe block. The fixing angle of the shoe block may be adjusted by moving the position adjusting member horizontally while in contact with the concave spherical surface.

0010

[Operation] In the present invention, since a shoe block angle adjusting means is provided to adjust the fixing angle of the shoe block,
By adjusting the fixing angle of the shoe block, it is possible to adjust the position of the shoe block not only in the horizontal direction but also in the vertical direction. Therefore, it becomes possible to more appropriately control the amount of upper and lower burrs, and the occurrence of uneven thickness in the coating layer of the manufactured composite wire is prevented.

[0011]

[Examples] Examples of the present invention will be described in detail below. FIG. 1 shows an embodiment of the two-wheel type continuous extrusion apparatus of the present invention. In the figure, parts that are the same as or corresponding to those in FIG. 3 are designated by the same reference numerals. The extrusion device of this embodiment is characterized by position adjustment means for adjusting the positions of the respective tools of the shoe blocks 12a and 12b and the abutments 14a and 14b. That is, shoe blocks 12a and 12b
The position adjustment means consists of wedge-shaped members 20a and 20b fixed to the tips of adjustment bolts 21a and 21b, respectively, and restraining plates 22a and 22b that support each adjustment bolt. In addition, the shoe blocks 12a and 12b are formed with inclined portions 23a and 23b, respectively, at positions where they come into contact with the wedge-shaped members 20a and 20b. On the other hand, the configuration of the position adjusting means for the abutments 14a and 14b is completely the same as that of the shoe block, and the wedge-shaped member 24
a and 24b, adjustment bolts 25a and 25b, and restraining plates 26a and 26b. Further, the abutments 12a and 12b are formed with inclined portions 27a and 27b, respectively, at positions where they abut against the wedge-shaped members 24a and 24b.

Next, the operation of adjusting the position of the shoe block or abutment in the extrusion device having the above structure will be explained by taking the position adjustment of the shoe block 12a as an example. First, the adjustment bolt 21a is rotated, and the wedge-shaped member 2 that is in contact with the inclined part 23a of the shoe block 12a is rotated.
Move 0a horizontally. When the wedge-shaped member 20a is moved in the extrusion direction, the shoe block 12a rotates slightly counterclockwise, and the position of the shoe block 12a is adjusted downward in the portion where extrusion is performed. On the other hand, when the wedge-shaped member 20a is moved in the opposite direction to the extrusion direction, the shoe block 12a rotates slightly clockwise, and the position of the shoe block 12a is adjusted upward in the portion where extrusion is performed. In this way, the vertical angle of the shoe block 12a is finely adjusted. The positions of shoe block 12b and abutments 14a and 14b can also be adjusted using the same procedure.

[0013] The amount of necessary adjustment of the vertical position of the shoe block, etc. is determined based on the thickness deviation of the upper and lower coating layers of the extruded composite wire during extrusion, the amount of coating material supplied, the weight of generated burrs, etc. It is determined by determining the equilibrium state of For example, if the diameter of the covering material is 9.5 mm and the extrusion yield is 90%, the thickness of the generated burr is about 0.2 mm. To adjust this amount, the required vertical adjustment amount of the shoe block, etc. is about 0.2 mm. In reality, uneven thickness becomes a problem when extrusion is performed under conditions where the material yield is poor. For example, there are cases where the material yield is less than 50%, and in this case the thickness of the burr is as much as 1 mm, and the required amount of vertical adjustment is about 1 mm.

The thickness unevenness ratio when extrusion is actually performed is shown below. When the material yield was 92%, the thickness unevenness ratio of the composite wire without adjustment was 1.21. Furthermore, the ratio of the amount of burrs generated on the upper and lower sides was 2.33/1, which was significantly unbalanced between the upper and lower sides, even though the supply amount of the coating material was constant. Therefore, the amount of adjustment of the vertical position of the shoe block was varied, and the ratio of the amount of burrs generated was adjusted to 1/1. the result,
The thickness unevenness ratio was improved to 1.02. Further, when the burr generation ratio was adjusted to 1/1.05, the thickness unevenness ratio was 1.0.

FIG. 2 shows another embodiment of the two-wheel type continuous extrusion apparatus of the present invention. In the extrusion device of this embodiment, the position adjustment means for the shoe blocks 12a and 12b on the core wire supply side are composed of position adjustment members 27a and 27b having convex spherical surfaces 28a and 28b, respectively, and the convex spherical surface 28a and 28b are adapted to be joined to concave spherical surfaces 29a and 29b formed on the shoe block. The rest of the structure is the same as the device in FIG. 1, and the same or equivalent parts are designated by the same reference numerals.

In this embodiment, when adjusting the position of the shoe block 12a, for example, the position adjustment member 27a is moved in the horizontal direction by an adjustment bolt (not shown), and the convex spherical surface 28a and the concave spherical surface 29a of the shoe block 12a are aligned. Adjust pressure. When the position adjustment member 27a is moved in the extrusion direction, the shoe block 12a is pushed and the concave spherical surface 29 moves upward while sliding on the convex spherical surface 28a. The position will be adjusted downward. When the position adjustment member 27a is moved in the opposite direction to the extrusion direction, the position adjustment member 2
The pressure caused by 7a weakens, and the concave spherical surface 29 becomes the convex spherical surface 28.
Move downward while sliding on a, and reversely move to shoe block 1.
The part 2a where extrusion is performed will be adjusted upward.

[0017]

Effects of the Invention As explained above, according to the present invention, the supply pressure of a pair of coating materials can be easily adjusted, and uneven thickness does not occur in the coating layer of the obtained composite wire. If this occurs, the condition can be easily corrected.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a two-wheel type continuous extrusion device of the present invention.

FIG. 2 is a sectional view showing another embodiment of the two-wheel type continuous extrusion device of the present invention.

FIG. 3 is a sectional view showing the main parts of a conventional two-wheel type continuous extrusion device.

[Explanation of symbols]

10a, 10b Rotating wheel 11a, 11b groove 12a, 12b Shoe block 13a, 13b Nipple 14a, 14b Abutment 15 Meeting room 16 Dice 17 Core wire 18a, 18b Covering material 19 Composite line

Claims (3)

[Claims] 1. A shoe block comprising a pair of rotating wheels and a shoe block corresponding to each of the pair of rotating wheels,
A two-wheel type continuous extrusion device for manufacturing a composite wire by coating a core wire with a coating material under extrusion pressure, characterized in that a shoe block angle adjusting means for adjusting the fixing angle of the shoe block is provided. Extrusion equipment. 2. The shoe block angle adjusting means includes:
The shoe block has a wedge-shaped member that is movable in the horizontal direction, and has an inclined part corresponding to the wedge-shaped member, and the shoe block is moved in the horizontal direction with the wedge-shaped member in contact with the inclined part. The two-wheel type continuous extrusion device according to claim 1, wherein the fixed angle of the shoe block is adjusted. 3. The shoe block angle adjusting means includes:
The shoe block has a position adjusting member having a convex spherical surface and is movable in the horizontal direction, and the shoe block has a concave spherical surface corresponding to the convex spherical surface, and the convex spherical surface is in contact with the concave spherical surface. 2. The two-wheel type continuous extrusion device according to claim 1, wherein the fixing angle of the shoe block is adjusted by moving the position adjustment member in the horizontal direction.