JPH04344821A - Two-wheel type continuous extruding device - Google Patents

Abstract

PURPOSE:To obtain a two-wheel type continuous extruding device which can adjust easily the sealing surface pressure, does not necessitate high dimension accuracy of a tool, and also, whose handling work is facilitated. CONSTITUTION:In the two-wheel type continuous extruding device provided with a pair of the upper and the lower rotary wheels 10a and 10b, shoe blocks 25a and 25b corresponding to each of the rotary wheels, a collecting chamber 19 in which a core wire and a covering stock are collected, and covering stock inflow holes 18a and 18b for guiding the covering stock to the collecting chamber, the covering stock inflow holes 18a and 18b are formed in a position having a prescribed angle in the direction reverse to the rotating direction against a line for connecting the rotation axes of the upper and the lower rotary wheels 18a and 18b. This angle, is desirable to be 15-40.

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 improvement in the formation position of a coating material inflow hole in a two-wheel continuous extrusion device.

0002

[Prior Art] A two-wheel type continuous extrusion device is equipped with a pair of upper and lower rotating wheels, and the coating material supplied from the upper and lower directions by each rotating wheel is coated by extrusion onto a core wire supplied from the horizontal direction. This is a device that manufactures composite wire.

FIG. 5 shows an example of a conventional two-wheel type continuous extrusion device. This extrusion device consists of two sets of rotating wheels 10a and 10b having grooves 11a and 11b on their outer peripheral surfaces.
, fixed shoes 12a and 12b arranged corresponding to each rotating wheel 10a and 10b, abutments 14a and 14b that close grooves 11a and 11b, and nipples 15a and 15b that grip core wire 20 supplied from the outside.
, restraint plates 17a and 17b for restraining each abutment in a predetermined position, and adjustment bolts 16a and 16b for adjusting the position of each abutment.

[0004] In this extrusion device, the covering material 21a
and 21b are the grooves 11 of each rotating wheel 10a and 10b.
a and 11b, each coating material inflow hole 18
a and 18b and merges with the core wire 20 in the gathering room 19,
It is extruded through a die 13 and a composite wire 22 is formed. The covering material inflow holes 18a and 18b are formed on a line connecting the rotation axes of the rotating wheels 10a and 10b. The strength of the surface pressure on the sealing surface can be determined by adjusting the upper and lower abutments 14a and 14b independently with adjusting bolts 16a and 1.
6b by moving along the extrusion direction.

FIG. 6 shows another example of a conventional continuous extrusion device. The basic configuration of the device is the same as the extrusion device shown in FIG. 5, but in this embodiment, the covering material inflow hole 18a
and 18b are formed to have a constant angle in the rotation direction of the rotary wheels with respect to a line connecting the rotation axes of the rotary wheels 10a and 10b. Furthermore, in this embodiment, die boxes 23a and 23b are provided in which an abutment part and a nipple part are integrally formed. The strength of the surface pressure on the sealing surface is determined by adjusting the entire die boxes 23a and 23b, respectively, with adjusting bolts 16a and 16b.
It is moved and adjusted using . In addition, the adjustment bolt 16a
and 16b to tilt the die boxes 23a and 23b, it is possible to adjust not only the horizontal pressure but also the vertical pressure.

[0006]

[Problems to be Solved by the Invention] However, the conventional two-wheel type continuous extrusion device as described above has the following problems. In the extrusion device shown in Figure 5, the effect of adjusting the sealing surface by changing the position of the abutment is very small, so tools such as rotating wheels are worn out and deformed during extrusion processing, resulting in the generation of burrs. Even though the amount increased, this could not be adequately adjusted and the tool had to be replaced. In addition, in order to perform appropriate extrusion processing, it was necessary to provide each tool with high dimensional accuracy in advance. However, the dimensional accuracy of the tool had to be determined experimentally, and adjustment took a lot of time. moreover,
There is also a problem in that the retracting force (horizontal force) of the shoe block due to the rotational power of the rotating wheel is directly applied to the restraint section consisting of the restraint plate and the adjustment bolt, increasing the rigidity of the restraint section.

On the other hand, in the continuous extrusion apparatus shown in FIG. 6, by moving and adjusting the entire die box,
The sealing surface pressure can be adjusted relatively easily, and the dimensional accuracy of the tool does not need to be very high, so it is more practical than the device shown in FIG. However, the covering material inflow hole
Since the die box is formed at a position having a predetermined angle in the rotation direction with respect to a line connecting the axes of the upper and lower rotating wheels, the force required to restrain the die box is relatively large. Further, since the entire die box has a large structure, it is generally divided into two parts for handling problems. As a result, a problem arises in that the manufacturing cost of the die box increases. In addition, a new task is required to assemble or disassemble the die box that has been divided into two parts, which requires additional work time and specialized skill.

[0008] Accordingly, an object of the present invention is to provide a two-wheel type continuous extrusion device that allows easy adjustment of sealing surface pressure, does not require high dimensional accuracy of tools, and is easy to handle.

[0009]

[Means for Solving the Problems] The present invention provides a pair of rotating wheels, a shoe block corresponding to each of the rotating wheels, a collecting chamber in which a core wire and a covering material are collected, and a collecting room in which the covering material is collected in the collecting room. In a two-wheel type continuous extrusion device that continuously manufactures a composite wire by coating a core wire with a coating material by extrusion, the coating material inflow hole is provided with a coating material inflow hole that guides the core wire by extrusion, and the coating material inflow hole is provided with a It is formed to have a predetermined angle in the opposite direction to the rotation direction of the rotary wheel with respect to the connecting line. Preferably, this angle is within the range of 15 to 40 degrees.

0010

[Operation] The horizontal force (restraint force) required to restrain the die box is the horizontal component of the force that pulls the die box in due to the rotation of the rotating wheel, and the reaction force due to the power (extrusion pressure) of the rotating wheel. It has the same magnitude and opposite vector as the resultant force with the horizontal component force. Each horizontal component of the retraction force and the reaction force changes depending on the formation angle of the covering material inflow hole, and when the covering material inflow hole is formed at a predetermined angle in the opposite direction to the rotation direction of the rotating wheel. The restraining force becomes smaller. Further, the direction of the required restraining force in this case is opposite to the extrusion direction. In this case, no restraining force is required on the abutment side, and only the portion corresponding to the fixing shoe of the conventional extrusion device needs to be position adjustable. Then, by applying a relatively small restraining force from a direction opposite to the extrusion direction, the shoe block is restrained as necessary.

[0011] In addition, if the forming angle of the coating material inflow hole is such that the direction of the restraining force of the die box varies in both the extrusion direction and the opposite direction, the In this case, it becomes necessary to provide restraining portions of the die box both on the extrusion direction side and on the core wire supply side in the opposite direction, which is not preferable. Further, as the formation angle of the covering material inflow hole increases, the covering material inflow hole itself becomes longer. As the coating material inflow hole becomes longer, the pressure due to material flow increases in the middle of the inflow hole, and the contact friction resistance with the tool wall surface increases. As a result, pressure loss increases,
Extrusion becomes difficult. Therefore, the preferable forming angle of the covering material inflow hole has an upper limit as described above.

0012

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of a two-wheel type continuous extrusion apparatus of the present invention, and FIG. 2 is an enlarged sectional view showing the upper part of the extrusion apparatus of this embodiment. In the extrusion device of this embodiment, the covering material inflow holes 18a and 18
b is formed to have a certain angle in the extrusion direction with respect to a line connecting the rotation axes of the upper and lower rotation wheels 10a and 10b. Also, abutments 24a and 24
b does not have a position adjustment means (restriction part), and conversely, the shoe blocks 25a and 25b on the extrusion direction side are provided with restraint parts consisting of adjustment bolts 16a and 16b and restraint plates 17a and 17b. The other configurations are basically the same as the conventional extrusion apparatus shown in FIGS. 5 and 6, and the same or equivalent parts are designated by the same reference numerals as in FIGS. 5 and 6.

Next, the magnitude and direction of various forces that act when extrusion is performed using the extrusion apparatus of this embodiment will be discussed. As mentioned above, the restraining force F0 required to restrain the shoe block is the horizontal component f1 of the force F1 that pulls in the shoe block due to the rotation of the rotating wheel, and the reaction force F2 due to the power (extrusion pressure) of the rotating wheel. It has the same magnitude as the resultant force with the horizontal component force f2 of , but has a vector in the opposite direction. In FIG. 2, the directions in which the retraction force F1 and the reaction force F2 act are shown by vectors. FIG. 3 shows the vector of each force with the direction opposite to the extrusion direction being positive. The retraction force F1 and the reaction force F2 are shown in (a) and () in Fig. 3, respectively.
In the case of having the vector shown in b), the direction of the restraining force F0 can be either the same direction as the extrusion direction or the opposite direction, as shown in (c).

FIG. 4 shows the relationship between the forming angle of the coating material inflow hole with respect to the rotating wheel axis and the magnitude of the force acting in the horizontal direction. In this case, each force is defined as positive if it acts in the extrusion direction, and the direction of rotation (counterclockwise) of the rotary wheel is defined as positive for the forming angle of the covering material inflow hole. As can be seen from the figure, the horizontal component force f of the retraction force F1
1 always acts in the positive direction regardless of the forming angle of the covering material inflow hole, and takes a maximum value when the forming angle of the covering material inflow hole is around 0°. On the other hand, horizontal component force f2 of reaction force F2
f takes a nearly negative value in a region where the formation angle of the covering material inflow hole is negative, and a nearly positive value in a region where the formation angle of the covering material inflow hole is positive, and as the positive and negative angles become larger, f
The absolute value of 2 is also increasing.

[0015] The resultant force of the horizontal component f1 of the retraction force F1 and the horizontal component f2 of the reaction force F2 (-restraint force F0
) becomes 0 at a predetermined angle Θc in a region where the forming angle of the covering material inflow hole is negative, takes a negative value in a region where the angle is more negative than Θc, and takes a positive value in a region on the positive side. Moreover, as the angle goes to the positive side, the resultant force (-F0) also increases, and then reaches its maximum value. Therefore, if the forming angle of the covering material inflow hole is around Θc, the restraining force F0 can be 0 or relatively small, and the position of the shoe block can be adjusted with a small force, making fine adjustment easy. In addition, if the area is on the negative side of Θc, the resultant force is negative and the restraining force F0 is positive.
In other words, adjustment by force in the direction opposite to the extrusion direction is sufficient.

In this embodiment, the forming angle of the coating material inflow holes 18a and 18b is -25°, that is, the rotation wheel 1
It is formed to have an angle of 25° clockwise with respect to a line connecting the rotation centers of 0a and 10b. In this case, the restraining force is about 5 tons, which means that a relatively small restraining force is sufficient. Furthermore, if the angle is further clockwise than this angle, the horizontal component of the retraction force will always be smaller than the horizontal component of the reaction force, so the required restraint force will always be in the opposite direction to the extrusion direction. Become. As a result, a restraining mechanism on the core wire supply side becomes unnecessary, and the restraining part of the die box only needs to be provided on the extrusion direction side. Therefore, it becomes extremely easy to adjust the position of the die box and the sealing surface pressure.

[0017]

As explained above, according to the present invention, the pressure on the sealing surface can be easily adjusted, high dimensional accuracy of the tool is not required, and the handling operation becomes easy.

[Brief explanation of the drawing]

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

FIG. 2 is an enlarged cross-sectional view of the upper part of an embodiment of the two-wheel continuous extrusion device of the present invention.

FIG. 3 is an explanatory diagram showing vectors of forces acting in a two-wheel continuous extrusion device.

FIG. 4 is a diagram showing the relationship between each force acting in the two-wheel type continuous extrusion device and the angle of the coating material inflow hole.

FIG. 5 is a sectional view showing an example of a conventional two-wheel type continuous extrusion device.

FIG. 6 is a sectional view showing another example of a conventional two-wheel type continuous extrusion device.

[Explanation of symbols]

10a, 10b Rotating wheel 11a, 11b groove 12a, 12b Fixed shoe 13 Dice 14a, 14b Abutment 15a, 15b Nipple 16a, 16b Adjustment bolt 17a, 17b restraint plate 18a, 18b Covering material inflow hole 19 Meeting room 20 Core wire 21a, 21b Covering material 22 Composite line 23a, 23b Shoe block 24a, 24b Abutment 25a, 25b Shoe block

Claims (1)

[Claims] 1. A pair of rotating wheels, a shoe block corresponding to each of the rotating wheels, a gathering chamber where a core wire and a covering material gather, and a covering material inflow hole that guides the covering material to the collecting chamber. In a two-wheel continuous extrusion device that continuously manufactures a composite wire by coating a core wire with a coating material by extrusion, the coating material inflow hole is located at a position of the rotating wheel with respect to a line connecting the rotation axis of the rotating wheel. A two-wheel type continuous extrusion device, characterized in that it is formed in a direction having a predetermined angle in the opposite direction to the rotation direction.