JPS6152928A - Continuous extrusion device of composite wire - Google Patents

Abstract

PURPOSE:To prevent the thickness deviation of a covered wire by forming a small sized cylindrical part with eccentricity inside a subcontainer on a nipple and by providing a flow dividing edge and pressure resistant supporting piece in the cylindrical part. CONSTITUTION:The subcontainer 28 where a covering material 1 is introduced between a nipple 18 and die 20 is formed. The nipple 18 forms a small sized cylindrical part 30 with eccentricity inside the subcontainer 28 and a flow dividing edge 32 and pressure resistant supporting piece 34 are provided at the position corresponding to a communicating port 26. With this method the outer part covering material 1 is enabled to be flowed in many quantity on the opposite side of the communicating port 26 of the cylindrical part 30, also the dividing edge 32 conducts the flow of materials with good balance to the right and left. The composite wire 4 for good quality without any thickness deviation is thus obtainable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a continuous coating extrusion device for composite wire, which coats an outer coating material onto a core wire, such as an aluminum-coated steel wire.

(Prior art) As a continuous extrusion device of this type, the outer covering material is transferred from the outer covering material container formed between the annular wheel groove of the movable wheel and the fixed shoe block to the sub-container through the communication port of the fixed shoe block. However, it has been proposed that an external coating material is introduced into the confluence chamber formed between the nipple and the die through cutouts on both sides of the nipple within this subcontainer (Japanese Patent Application Laid-Open No. Showa 56-80
No. 319), this outer coating contacts the core wire passing through the nipple in the merging chamber and passes through the die to form a coating of a predetermined shape.

However, in this extrusion device, the nipple is supported over its entire length by the inner wall of the merging chamber, so its shape is restricted.
The passage for the material is narrow between the first port and the merging chamber, and the flow resistance is large, and the nipple is concentric with the merging chamber, so the material entering from the communicating port remains as a strong flow in the @lhi direction. Therefore, it is difficult to change the force uniformly in the horizontal direction, and the coating becomes uneven in the circumferential direction, resulting in uneven thickness. To avoid this, the length of the part of the nipple that has the Y3 drop part should be increased. This has the disadvantage of increasing extrusion resistance.

(Object of the Invention) An object of the present invention is to provide a continuous extrusion device for a composite wire that can coat the wire with small extrusion resistance without causing uneven thickness.

(Structure of the Invention) According to the continuous extrusion device for composite wire of the present invention, the nipple has a cylindrical portion with a smaller diameter in the subcontainer than the subcontainer and is biased toward the communication port side, and This small-diameter cylindrical portion has a flow dividing blade provided on the communication port side at a position facing the communication port, and a pressure-resistant support piece provided on the opposite side to the flow dividing blade. If the nipple is eccentric to the Tsudori port side in this way, the material entering the subcontainer from the communication port will flow sufficiently to the side opposite to the communication port, so the flow in the water direction will be uniform, and the material will be coated with less uneven thickness. Obtainable.

(Example) An example of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a continuous extrusion device 10 for composite wire according to the present invention,
This continuous extrusion device 0 consists of a fixed shoe block 12 and a movable wheel 16 having an annular wheel groove 16a forming a container 14 through which the outer covering 1 passes between the shoe face 12a of the fixed shoe block 12. There is.

The container 14 is connected to the shoe surface 12 of the fixed shoe block 12.
terminating in an abutment 12b formed at the end of a.

There is a nipple 18klE2 in the fixed shoe block 12.
0 &ff1N'XtfbFL-C', '6・°・7'
7t18.

is fitted into the sub-container 28 with a tighter fit than a dead fit. Nipple 18 and die 20 are each adjusted by positioning screws 22.24 to set the spacing therebetween. A sub-container 28 is formed between the nipple 18 and the die 20. The sub-container 28 communicates with the container 14 through a communication port 26 formed in the fixed shoe block 12 and into which the external covering material 1 is introduced. Inside the container 28, a cylindrical portion 30 having a diameter smaller than that of the sub-container 28 is collapsed, and as shown in FIG. A pressure-resistant support piece 34 that is provided on the opposite side of the flow dividing blade 32 and engages with the inner wall of the sub-container 28
and has. The core wire 2 has a nipple adjustment screw 22. The wire passes through the knee and pull 18 to contact the outer sheathing material 1 in the sub-container 28, and is led out through the die 20 and the die 31 node screw 24 to become the composite wire 4 with the outer sheath 3.

In this way, the nipple 18 has a small diameter inside the sub-container 28, and the communicating hole 26 is connected to the sub-container 28.
With eccentricity to the side, the outer dressing 1 introduced into the sub-container 28 through the communication opening 26 will flow sufficiently into the side opposite the communication opening 26 of the small diameter cylindrical part 30 of the nipple, especially the first As is clear from FIG. 1, the two-way flow dividing blade 32 and the pressure-resistant support piece 34 end before the small diameter portion 30, and therefore, as seen from FIG. The space on the side opposite to the communication hole 26 is sufficiently larger than the space on the side of the communication hole 26, so that a large amount of the external covering material 1 flows into the side opposite to the communication port 26. In addition, since the small diameter portion 30 is cylindrical, the coating material 1 easily flows into a cylindrical uniform flow beyond the small diameter portion 30, and the outer coating 3 does not have uneven thickness. A uniform flow of shape is easier to obtain as the length of the sub-container 28, that is, the distance between the nipple 18 and the die 20 is larger, but in consideration of flow resistance, these distances are set to the minimum distance that minimizes uneven thickness. Ru. This can be achieved by advancing the nipple 18 as far as possible, fixing the die 20, and performing extrusion, gradually retracting the nipple, and stopping the nipple at a point where the thickness deviation is least.

Next, in a specific example of the present invention, the diameter of the sub-container 28 is 20 to 20.02 ml11, and the outer diameters of the nipple 18 and die 20 are 11],! 39 to 20 times, the length of the branching blade 32 is 25 ma+, and the length of the pressure-resistant support piece 34 is 2
The small-diameter cylindrical portion 30 of the nipple 18 had an outer diameter of 10 a+m, and was offset by 2 mm from the sub-container 28. The angle of the diverter blade 32 was 80°, and the minimum thickness of the support piece 34 was 2 mm. The die hole diameter is 51. The core wire passing through the nipple was a piano wire with an outer diameter of 3.2 mm. With a spacing between the die and the nipple of 8+am, the eccentricity of the outer coating was only 0.04 stops.

Other examples use the same subcontainer.

An aluminum-coated steel wire with an outer diameter of 5 mm and a core wire diameter of 4i+m was manufactured using a nipple as shown in FIG. The eccentricity of the small diameter cylindrical portion 30 was set to 1.5n+m.

The reason why the eccentricity in this example is made smaller than in the previous example is to prevent the nipple wall thickness from becoming smaller due to the larger nipple hole diameter, and instead to increase the flow component of the material on the lower side. The lower side of the small diameter cylindrical portion 30 is marked 30a.
It is chamfered as shown in .

(Effects of the Invention) According to the present invention, as described above, the outer sheathing material can sufficiently flow on the side opposite to the communication port and can smoothly change into a circular flow, and the flow dividing blade can also flow smoothly on the side opposite to the communication port. This has the practical benefit of guiding the flow of material from side to side in a well-balanced and smooth manner, thereby producing a high-quality composite wire with no uneven thickness.

[Brief explanation of drawings]

FIG. 1 is a #fr side view of a continuous extrusion device for composite wire according to the present invention, and FIGS. 2 to 4 are lines A-A', B-B' and c-c' in FIG. 1, respectively. FIG. 5 is a side view of a modified example of the knot used in the present invention. 1--1--Outer covering material, 2----- Core wire. 3---One outer covering, 4---Composite wire. 10----Continuous extrusion device for double gold wire, 12-111 fixed shoe block, 14----Container, 16-
----Machimo wheel, 16a---Wheel groove, 18---Nipple, 20---Die, 2
6-----Series B, 28-----Subcontainer, 3
0--1--Small diameter cylindrical portion, 32-----Diversion blade. 34 - - Pressure-resistant support piece. M2 figure Chin 3 figure Chest 5 figure 18 Chest 4 figure

Claims (1)

[Claims] It consists of a movable wheel having an annular wheel groove that forms a container through which an external covering material passes between a fixed shoe block and a shoe surface of the fixed shoe block, and a nipple and die provided in the fixed shoe block and through which a core wire passes. , in a continuous extrusion device for a composite wire, having a sub-container provided in the fixed shoe block between the nipple and the die and communicating with the container through a communication port,
In the sub-container, the nipple has a cylindrical portion having a smaller diameter than the sub-container and is eccentric toward the communication port, and the small-diameter cylindrical portion is located opposite to the communication port and is eccentric toward the communication port. A continuous extrusion device for a composite wire, characterized in that it has a diverter blade provided and a pressure-resistant support piece provided on the opposite side of the diverter blade.