JPH0890054A - Extruding part structure of rotary wheel type extruding machine - Google Patents

Abstract

PURPOSE: To obtain the extruding part structure of a rotary wheel type extruding machine capable of preventing seizure of a nipple. CONSTITUTION: A nipple 9 is provided with small holes 14 of the prescribed number communicating from an assembling chamber 8 to a core introducing part 13, an extruding stock 5 extruded from the small hole 14 is interposed between inner face of nipple 9 and a core wire 10. Aluminum is interposed between the nipple inner face and core wire, there is no seizure to a core wire introducing part 13 of nipple 9, no defect is generated to the core wire 10, wire breakage in the subsequent drawing process is to prevented to improve productivity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an extrusion section of a rotary wheel type extruder, which can obtain a high quality composite wire.

[0002]

2. Description of the Related Art A rotary wheel type extruder is widely used for manufacturing aluminum-coated steel wires and the like because it can continuously manufacture long products and is excellent in productivity. This rotary wheel type extruder has an endless groove 2 and an endless groove 2 provided on the periphery of a rotary wheel 1 as shown in FIG.
A passage 4 is formed by a fixed shoe block 3 that engages with the extruded material 5, and the extruded material 5 is continuously supplied into the passage 4. The extruded material 5 due to the frictional resistance generated in the
An extruding pressure is generated in the abutment 6, and this is further increased to an extruding equivalent pressure in the sub-container 7 provided in the abutment 6 and the collecting chamber 8 at the back thereof, and the core wire 10 is supplied to the collecting chamber 8 through the nipple 1. The extruded material 5 is compounded on the outer periphery of the core wire 10,
This composite body 11 is molded through a die 12.
As described above, since the rotary wheel type extruder generates an extrusion pressure by frictional resistance, a soft material having a relatively low melting point such as aluminum is often used as an extrusion material.

[0003]

FIG. 3 is an enlarged view of the nipple portion of the rotary wheel type extruder. The core wire 10 passes through the core wire introducing portion 13 of the nipple 9 and enters the collecting chamber 8. The clearance between the core wire 10 and the core wire introduction portion 13 of the nipple 9 is narrowed in order to prevent uneven thickness of the obtained composite wire 11. Since the clearance is so narrow, when the core wire 10 is displaced due to the pressure fluctuation in the collecting chamber, the core wire 10 comes into contact with the inner surface of the hard nipple (usually made of tool steel) 9, and seizure occurs at the contact portion. This seizure portion becomes a defect, and causes a disconnection when the composite wire 11 is drawn later. The present invention
An object of the present invention is to provide an extrusion part structure of a rotary wheel type extruder in which seizure of a nipple is prevented.

[0004]

According to the present invention, a passage 4 is formed by an endless groove 2 provided at a peripheral edge of a rotary wheel 1 and a fixed shoe block 3 engaging with the endless groove 2, and the passage 4 is formed in the passage 4. Extruded material 5 is continuously supplied to
The extrusion pressure is generated in the extrusion material 5 by the frictional resistance generated between the extrusion material 5 and the inner surface of the endless groove 2 as the rotary wheel 1 rotates, and the sub-container 7 provided in the abutment 6 Meeting room 8 at the back
To a pressure equivalent to extrusion, and the core wire 10 is supplied to the collecting chamber 8 through the nipple 9, the extrusion material 5 is compounded on the outer periphery of the core wire 10, and the composite body 11 is molded through the die 12 to form a rotary wheel type extruder. In the nipple 9, a required number of small holes 14 communicating with the core wire introducing portion 13 from the collecting chamber 8 are provided, and the extruded material 5 extruded from the small holes 14 is interposed between the inner surface of the nipple 9 and the core wire 10. It is the extrusion part structure of the rotary wheel type extruder characterized by the above.

1A and 1B are a longitudinal sectional view and a rear view showing an embodiment of a structure of an extrusion part of a rotary wheel type extruder of the present invention. In the nipple 9, small holes 14 communicating with the core wire introducing portion 13 from the collecting chamber 8 are provided at four locations at equal intervals. The small hole 14
The extruded material 5 extruded from is dragged by the running core wire 10 and is interposed between the core wire 10 and the inner surface of the nipple 9 near the collecting chamber 8. In addition, R is attached to the inner surface of the core wire introducing portion 13 of the nipple 9 so that the core wire 10 can be smoothly introduced.

In the present invention, the number, shape, position (distance L from the collecting chamber), direction (angle θ with respect to the axial direction) of the small holes 14 provided in the nipple 9 are extruded from the small holes 14. It is optional as long as the material 5 is configured to be dragged by the core wire 10 and interposed between the inner surface of the nipple 9 and the core wire 10.

[0007]

In the structure of the extrusion part of the rotary wheel type extruder of the present invention, the nipple is provided with a required number of small holes leading from the collecting chamber to the core wire introducing part, and the extruded material extruded from the small holes is between the inner surface of the nipple and the core wire. It is intended to intervene. Therefore, even if the core wire is displaced due to the pressure fluctuation in the collecting chamber, the soft extruded material is interposed between the core wire and the nipple, so that seizure does not occur on the inner surface of the core wire introducing portion of the nipple.

[0008]

EXAMPLES The present invention will be described in detail below with reference to examples. (Example 1) An aluminum-coated steel wire with an outer diameter of 5.4 mmφ (steel wire diameter: 3.2 mmφ) of 40 m / min. Extruded 10 tons at speed. A 9.5 mmφ pure aluminum wire was used as the extruded material. The metal temperature in the assembly chamber was 530 ° C. The number and diameter of small holes were variously changed. The radius of the nipple is 200 mmφ, and the diameter D of the inlet of the nipple is 3.6.
mmφ.

(Comparative Example 1) An aluminum-coated steel wire was extruded by the same method as in Example 1 except that a conventional rotary wheel type extruder having no small holes in the nipple as shown in FIG. 3 was used. The obtained aluminum-coated steel wire was drawn to have a diameter of 3.6 mm, and the number of breaks during drawing was examined. The results are shown in Table 1.

[0010]

[Table 1]

As is clear from Table 1, the product of the present invention (No.
All of 1 to 7) were unbroken. This is because aluminum is present between the inner surface of the core wire introducing portion of the nipple and the core wire to prevent seizure. On the other hand, the comparative example product No. 8
Was disconnected three times. When the broken portion was examined, scratch-like defects were found on the surface of the steel wire. Although the case where an aluminum-coated steel wire is manufactured has been described above, the same effect can be obtained when the present invention is used for manufacturing a composite wire made of another core material and a covering material such as a composite deformed trolley wire.

[0012]

As described above, according to the extrusion part structure of the rotary wheel type extruder of the present invention, since aluminum is interposed between the inner surface of the core wire introduction part of the nipple and the core wire, there is no seizure in the core wire introduction part of the nipple. Therefore, the core wire is not defective, and the breakage is prevented in the subsequent wire drawing step, and the productivity is improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view and a rear view showing an aspect of a structure of an extrusion part of a rotary wheel type extruder of the present invention.

FIG. 2 is an explanatory view of a rotary wheel type extruder.

FIG. 3 is a vertical cross-sectional view showing a structure of an extrusion part of a conventional rotary wheel type extruder.

[Explanation of symbols]

 1-Rotating wheel 2-Endless groove 3-Fixed shoe block 4-Passage 5 Extrusion material 6-Abutment 7-Sub container 8-Gathering chamber 9-Nipple 10-Core wire 11- ─Composite 12 ──Die 13 ──Nipple core wire introduction part 14 ──Small hole

Claims (1)

[Claims] 1. A passage (4) is formed by an endless groove (2) provided in a peripheral edge of a rotating wheel (1) and a fixed shoe block (3) engaging with the endless groove (2), and the passage (4) is formed. (4) The extruded material (5) is continuously supplied into the inside of the extruded material (5) and the extruded material (5) and the inner surface of the endless groove (2) due to the frictional resistance generated by the rotation of the rotating wheel (1). Extrusion pressure is generated in the material (5), and this is further installed in the abutment (6), the sub-container (7) and the gathering chamber in the back
The pressure equivalent to extrusion is increased by (8), the core wire (10) is supplied to the collecting chamber (8) through the nipple (9), and the extrusion material (5) is compounded on the outer periphery of the core wire (10). In the rotary wheel type extruder for molding the body (11) through the die (12), the nipple (9) is provided with a required number of small holes (14) communicating with the core wire introducing portion (13) from the collecting chamber (8), The extrusion part structure of a rotary wheel type extruder, wherein an extrusion material (5) extruded from the small hole (14) is interposed between the inner surface of the nipple (9) and the core wire (10).