JPH0147266B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a cutting die (hereinafter also simply referred to as a die or die) for producing stranded wire.

Conventionally, the manufacturing method for stranded wire, especially annealed copper stranded wire, has been separated into three steps: (a) wire drawing process, (b) annealing process, and (c) wire stranding process, which requires large manufacturing equipment and a large installation area. In addition, since the drum winding portions overlap in each step (a) to (c), power consumption is high.

Therefore, the present applicant has developed a new method and device for manufacturing stranded wire in order to make the wire drawing, annealing, and stranding processes continuous, thereby downsizing the entire manufacturing process, reducing installation space, and reducing power consumption. Published in 1987-
This was proposed in Publication No. 1533. As shown in FIGS. 1 and 2, this device has an annular groove 3 formed between an internal rotating body 1 and an external rotating body 2 that rotate in the same direction, and The raw material 5 is continuously fed out by a fixed or rotationally movable show member 4 arranged in the same direction, and the fed material 5 is turned into a plurality of strands 9 by a rotary head 8 having a plurality of dies 6 arranged in an annular shape. This is a device that manufactures a stranded wire 11 by sending it out from a passage 10 and twisting it together with a plurality of sent out strands 9.

A conventional example of the die 6 mounted on the rotary head 8 of the above-mentioned apparatus has the shape shown in FIG. In the figure, the material 5 is progressing in the direction of the arrow,
It is received by a concave or inverted conical bell portion 300 of the die 6. The material within the semicircle 305 on the front surface of the die 6 flows from the bell section 300 to the reduction section 301 while causing plastic flow due to high pressure. The reduction portion 301 has a gently tapered shape, and by passing through this, the material 5 is gradually formed into a thinner shape. Thereafter, by passing through a bearing portion 302 having a uniform cross-sectional shape, the final shape of the wire 9 is obtained. The strand 9 that has passed through the bearing part 302 is separated from the die 6 by the taper of the release part 303 and sent out to the outside of the die 6 through the inner groove 304 . In this way, forming the wire 9 from the raw material 5 using the die 6 is as follows:
Basically, the principle is extrusion using frictional force.

However, in order to efficiently use the conventional die shown in FIG. 24 above, the rotary head 8 in FIG.
There is a problem in that when used on a sloped part, the power used becomes very large. That is, the work done in this extrusion molding is the work of the inclined part of the rotary head 8 to push through the material 5, the work of the bell part 300,
The work that causes distortion in the reduction section 301 is the work of friction when the wire passes through the bearing section 302. Furthermore, high pressure to cause plastic flow needs to be applied over a wide range of the semicircle 305 on the front surface of the die 6.

Further, since the plastic flow is not smooth, even if the relatively long reduction portion 301 is provided, the surface of the winding becomes rough, and satisfactory results regarding formability cannot necessarily be obtained.

Therefore, the inventors of the present invention set out to provide a molding die that can be attached to the rotating head of a continuous stranded wire manufacturing apparatus as described above, which has excellent moldability and durability, and can reduce the power required for molding. As a result of various studies, we discovered that the above object could be achieved by providing extrusion functions as well as cutting and molding functions, and by creating a die structure with a shape that provides less resistance to the material, thereby creating the present invention. It came to this.

Conventionally, the dies shown in FIGS. 3 to 6 are known as dies equipped with an extrusion function and a cutting function, but the structure of the die of the present invention is different from any of these dies. It is.

That is, Fig. 3 shows a die used in the so-called cut-forming process, Fig. 3 a shows its plan view, and b shows its front view, which corresponds to the A-A cross section of do. In FIG. 3, reference numeral 12 denotes a block-shaped die that advances in the direction of arrow a, and a passage 13 for cutting products is provided inside the die 12 at an angle to one side of the die 12.
The sharp tip 14 formed by the sloped surface of and the cutting edge is used as a cutting blade, and the cutting blade 14 is pressed against the material 15 rotating in the direction of the arrow b to cut the material 15, and the cut material is removed from the passage 13. It is sent out in the direction of arrow c. Note that angles 5, 5' and 5'' are for die 1.
This is the clearance angle for the material 15 of No. 2. However, such types of dies are asymmetrical and complex in shape;
The manufacturing process of the die is difficult and expensive, making it unsuitable for mass production.

Figure 4 shows a die used in a process called the Filaderm Process, in which a pore 17 is bored in the center and the tip of the pore 17 is formed into a cutting edge 18. It is made from a super hard material like diamond using a die. In this die, the material 19 rotates in the direction of arrow d.
By strongly pressing the cutting blade 18 at the tip of the die 16, the high pressure generated causes the material to be cut into the pores 17.
It is extruded as a finer wire 20. Therefore, this die 16 is suitable for producing ultra-fine wires, but is not suitable for producing anything other than ultra-fine wires. In addition, since it is made of diamond, it is not suitable for processing that involves heating above warm temperatures.

FIG. 5 shows a facing die used in a continuous casting method called the dip-forming process. The deep forming process is a wire manufacturing method in which the wire is passed through a seed wire in a crucible filled with molten material, and the melted material is attached to the wire to gradually thicken the wire. It is attached to the crucible (not shown) in series. That is, the cylinder 24
A conical part 23 is provided on the upper part of the conical part 23.
An opening 22 communicating with the internal space 25 of the cylinder 24 is provided at the tip of the cylinder 24, and the peripheral edge of the opening 22 is formed into a cutting blade 21. In addition, a notch 27 is provided on the surface of the conical portion facing the opening 22, and a release portion 26 that expands from the cutting blade 21 toward the internal space 25 is provided directly, thereby forming the cutting edge of the cutting blade 21 to be sharp. . The purpose of this die is to insert a seed wire (not shown) into the opening 22 in the direction of arrow e to remove surface oxides and deposits from the seed wire, and at the same time to seal the atmosphere inside the crucible.

FIG. 6 shows a facing die for wire used in pre-treatment processes such as wire drawing, in which an opening 30 communicating with the internal space 29 of the cylinder 28 is formed in the center of the upper surface of the cylinder 28 whose upper and lower surfaces are flat. A perforated disc-shaped protrusion 31 is provided, and the peripheral edge of the opening 30 is formed into a cutting blade 32, and the area from the cutting blade 32 to the internal space 29 is expanded directly from the cutting blade 32, similar to the die shown in FIG. They communicate via a release part 33 that opens. This facing die cuts the surface of the wire pulled in the direction of the arrow f using the cutting blade 32.
It is used for the purpose of removing surface oxides and deposits by scraping. In this way, Figures 5 and 6
The die shown in the figure was originally used to cut the surface of a wire with a circular cross section, and it is difficult to cut the material with a large reduction (reduction rate of area) and extrude it. It is unsuitable for use as a die attached to a rotating head of manufacturing equipment.

The present invention was completed by focusing on the problems of such conventional dies, and has an annular groove formed between an internal rotary body and an external rotary body rotating in the same direction, and an annular groove formed on the outer periphery of the internal rotary body. The material is continuously fed out by a rotatably movable shoe member placed against the
An opening having a cutting edge in a die used in a twisted wire manufacturing device that sends out the material as a plurality of strands by a rotating head having a plurality of dies arranged in a ring, and twists the plurality of strands that are sent out. a bearing part that is connected to the opening and has the same cross section as the strand; A release part that is connected to the bearing part and gradually expands, and an inner groove that is connected to the expanded end of the release part, from the tip of the protruding part to the other end of the support, along the central axis of the support. It has a structure in which it is installed along the line.

Next, embodiments of the die of the present invention will be described based on the drawings.

FIG. 7a is a plan view of the die of the present invention, and FIG. 7b is a front view thereof. In the figure, the die A ₁ of the present invention has a conical protrusion 41 horizontally provided with an opening 40 at its upper end and is integrally formed with the upper edge 43 of a cylindrical support 42 . A bearing part 44 is provided in communication with the protruding part 41 in the direction of its central axis, and a release part 46 that gradually expands from the lower end edge 45 of the bearing part 44 is connected to the lower end edge 45 of the release part 46 . An inner groove 48 extends from 47 in the direction of the central axis of the support body 42 . Thus, a cutting edge 49 is formed in the opening 40 formed by the line of intersection between the upper edge of the protruding portion 41 and the upper edge of the bearing portion 44 . Also, the seventh
In die A ₁ shown in the figure, the opening 40 and the bearing part 4
Although the cross section of 4 is formed into a perfect circle, it can be formed into an appropriate shape according to the cross-sectional shape of the wire to be molded.

FIG. 8 is a partial sectional view showing a state in which the die A ₁ of the present invention shown in FIG. 7 is attached to the rotating head 8 of the stranded wire manufacturing apparatus shown in _FIG . The traveling direction arrow B is shown in the section 203.
The center axis L of the die A ₁ is mounted at an angle θ with respect to the vertical position of the die holder 200 with respect to the contact surface 202 with the raw material 201 . In this case, the die _A1 is mounted so that the entire cutting edge 49 and part of the protrusion 41 bite into the material 201 filling the annular groove 3 facing the rotating head 8 in FIG.
The die _A1 mounted on the die holder 200 of the rotary head in this way moves along with the die holder 200 in the direction indicated by the arrow B.
As the material 201 advances in the direction, it is cut by the cutting blade 49 of the die A ₁ and continuously fed into the bearing part 44 , and after being formed into a predetermined cross-sectional shape, the material 201 is cut into the release part 46 and the inner groove 48 . The wire is then sent out from the wire passageway 204 in the rotating head to the outside of the machine.

Other embodiments of the die of the present invention are shown in FIGS. 9 to 19, and in each figure, a is a plan view and b is a front view. The difference between the die A ₂ of the embodiment shown in FIG. 9 and the die A ₁ of FIG. 7 is that the cutting edge 50 is
is cut diagonally at the tip of the protrusion 51.
An alignment band 52 is formed on one side of the upper surface of the protruding portion 51 to ensure alignment between the cutting edge 50 and the cutting edge 50, and a cutout portion 54 is formed on the opposing side surface of the columnar support 53. In addition, 55 is a bearing part, 56
is a release part and is constructed in the same way as die _A1 in FIG. As shown in FIG. 8, the die A ₂ of this embodiment is mounted on the die holder 200 of the rotary head so that the surface of the obliquely cut cutting edge 50 is more perpendicular to the contact surface 202 between the material 201 and the die holder 200. By attaching the cutting blade 50 and the material 20 to
The contact resistance with A1 increases, and more material can be fed into the bearing part 55 compared to the _A1 die. Furthermore, when feeding the same amount of material as the die A ₁ , the installation inclination angle θ of the die A ₂ with respect to the die holder 200 can be made small. Further, a notch 54 formed on the side surface of the support body 53 is used for positioning when mounting the die holder 200 in the hole 203 (FIG. 8).

FIG. 10 shows another embodiment of die _A3 .
The difference between the die A ₃ and the die A ₁ shown in FIG. Similar to die _A2 in FIG. 9, a notch 64 is formed. In addition, 65 is the bearing part,
Reference numeral 66 denotes a release portion, which is constructed in the same manner as the die _A1 in FIG.

When using the die _A3 of this embodiment, the material 201 of FIG. 8 is inserted into the die of FIG.
_A2 or more can be fed into the bearing part 65.

FIG. 11 shows another embodiment of die _A4 .
The difference between the die A ₄ and the die A ₁ is that the cutting edge 70 and the bearing part 74 have an oval cross-sectional shape, and
The point is that notches 73 similar to those of the die _A2 are formed on both opposing sides of the support body 72. In addition, 71 is a protrusion part and 75 is a release part.

The die A ₄ of this embodiment is placed in the die holder 20 of FIG.
0, when the horizontal longitudinal direction of the ellipse of the cutting blade 70 is installed at an angle θ in a direction that coincides with the advancing direction B of the die, the tendency of the cross section of the wire fed into the bearing part 74 to become flattened is alleviated. It has the effect of

FIG. 12 shows die _A5 of another embodiment. Thailand
The difference between the die _A5 and the die _A2 shown in FIG. 9 is that the cutting blade 80 and the bearing portion 85 have an oval cross-sectional shape.

When using this die A ₅ , the amount of material fed into the bearing part is large as in A ₂ in Fig. 9,
In addition, the tendency of the strand cross section to become flattened compared to _A2 is alleviated, and the formability of the strand is improved.

In the figure, 81 is a protrusion, 82 is a matching band, and 83
84 represents a support, 84 represents a notch, and 86 represents a release portion.

FIG. 13 shows die _A6 of another embodiment. Thailand
The difference between die A ₃ shown in FIG. 10 of A ₆ is as follows:
The cutting edge 90 and the bearing portion 95 have an oval cross-sectional shape. When this die _A6 is used, the effect of the die _A4 in FIG. ₁₁ is added in addition to the effect of the die A3. In the figure, 91 is a protrusion, 92 is a socket, 93 is a support, 94 is a notch, and 96 is a release part.

The die A ₇ shown in the embodiment of FIG.
02, and the other components are the same as the die _A1 in FIG. This rake face 10
2 is a tapered surface formed so that the diameter gradually decreases from the circumferential edge of the cutting edge 100 toward the upper edge of the bearing portion 101; By widening the formed angle K, the strength against the shearing force acting on the cutting blade 100 can be reinforced and durability can be increased. In addition, 104 is a support, 1
05 is a release part.

The die A ₈ shown in the embodiment of FIG.
17, and is otherwise the same as die _A2 in FIG. The function of the rake face 117 is similar to that of the die _A7 .

In addition, 111 is a protrusion, 112 is a matching band, 11
3 is a support body, 114 is a notch portion, and 116 is a release portion.

Die A ₉ shown in the embodiment of FIG. 16 is similar to die A 3 of FIG. ₁₀ except that a rake face 127 similar to die A ₇ of FIG. It is configured in the same way.

In addition, 121 is a protrusion, 122 is a socket, 12
3 is a support body, 124 is a notch portion, and 126 is a release portion.

Die A ₁₀ shown in the embodiment of FIG. 17 is similar to die A 4 of FIG. 11 except that a rake face 136 similar to die A ₇ of FIG. 14 is provided between the cutting edge 130 and the bearing portion ₁₃₄ . It is configured in the same way.

Note that 131 is a protrusion, 132 is a support, and 13
3 is a notch portion, and 135 is a release portion.

Die A ₁₁ shown in the embodiment of FIG. 18 is similar to die A 5 of FIG. 12 except that a rake face 147 similar to die A ₈ of FIG. 15 is provided between the cutting edge 140 and the bearing portion ₁₄₅ . It is configured in the same way.

In addition, 141 is a protrusion, 142 is a matching band, 14
3 is a support body, 144 is a notch portion, and 146 is a release portion.

Die A ₁₂ shown in the embodiment of FIG. 19 is similar to die A 6 of FIG. 13 except that a rake face 157 similar to die A ₉ of FIG. 16 is provided between the cutting edge 150 and the bearing portion ₁₅₅ . It is configured in the same way.

In addition, 151 is a protrusion, 152 is a socket, 15
3 is a support body, 154 is a notch portion, and 156 is a release portion.

FIG. 20a shows a state in which the die A ₁₃ shown in FIG. 7, which has a structure in which a notch is provided in the protrusion of the die A ₁ , is mounted obliquely on the die holder 200 of the rotary head in the same way as in FIG. 8. There is. Die A ₁₃ has protrusion 16
A partial notch 1 at the contact surface with the material 201 of 1
The structure is the same as that shown in FIG. 7 except that 65 is formed. In addition, 160 is a cutting blade, 162 is a support body,
163 is a bearing part, and 164 is a release part. The die A ₁₃ moves in the direction of arrow B together with the die holder 200, and the material 201 is cut by the cutting blade 160 and fed into the bearing part 163 to be molded.

FIG. 20b is a diagram showing the advancing direction of the die A ₁₃ shown in FIG. Only material 2
The amount of deformation of 01 is reduced, and therefore the power required for pushing the materials apart can be reduced.

Such a notch provided on the protrusion surface of the die can also be applied to the dies A ₂ to A ₁₂ shown in FIGS. 9 to 19.

FIG. 21a shows a die A ₁₄ having the same structure as in FIG. 7 except that the length of the bearing portion 173 is shortened, and is mounted on the die holder 200 of the rotary head in the same manner as in FIG. 8. In this case, when the die A ₁₄ advances in the arrow direction B with respect to the material 201, the cutting edge 170 of the die A ₁₄ does not form the outermost part of the die in the material 201 when projected, that is, in the case shown in the figure. Intersection line 1 between the protrusion 171 and the support 172
75 is installed with an inclination angle θ ₁ such that the outermost part is the outermost part. When the die is attached to the die holder with such an inclination angle, the flow resistance when the material 201 passes through the protrusion 171 is reduced, and the shear stress acting near the tip of the protrusion 171 is alleviated, and Since the surface of the cutting edge 170 approaches perpendicular to the direction of movement of the die, the force acting on the material 201 from the tip opening of the die in the direction of the central axis L also becomes large. Therefore, in order to improve the moldability including the roundness of the wire in the bearing part 173, the length of the bearing part is formed shorter than that of the die _A1 in FIG. 7, and the power required for molding is reduced. becomes possible.

FIG. 21b is a diagram showing the direction of movement of the die A ₁₄ shown in a in the front direction, and the cutting edge 170 of the die A ₁₄ constitutes the outermost shell of the die in the direction of movement of the die in the material. Without, the protrusion 171 and the support 172
It can be seen that the intersecting line 175 with A constitutes the outermost contour A.

In addition, 174 is a release part, and 175 is a protrusion part 1.
71 and the support 172 are shown.

In FIG. 22a, the length of the bearing part 183 is shortened, and the cutting blade 185 is placed at a symmetrical position on the support body 182.
The die A ₁₅ having the same structure as in FIG. 7 except for the provision of the die A 15 is shown mounted on the die holder 200 with the same inclination angle θ ₁ as in FIG. 21. in this case,
When the die A ₁₅ moves in the direction of the arrow B, the cutting edge 180 of the die A ₁₅ projected in the direction of movement does not constitute the outermost part of the die in the material 201, as in the case of FIG. By providing the notch 185, the amount of deformation of the material 201 is reduced compared to the case shown in FIG. That is, FIG. 22b is a diagram showing the advancing direction of the die A ₁₅ shown in a to be the front direction, and of the tangent between the protrusion 181 and the support 182, the part in contact with the material 201 is shown at 186. Compared to the die _A14 in which the support body is not provided with a notch in FIG. 21, the amount of deformation that pushes the material 201 is
only decreases. Therefore, it is possible to save the power for pushing the material apart corresponding to the amount of deformation β of the material.

FIG. 23a shows a die A ₁₆ having the same structure as FIG. It shows a state where it is attached to the die holder 200 with the same inclination angle θ ₁ as in FIG. 21. In this case, the protrusion 19
The inclination angle θ ₂ of the die A 1 with respect to the horizontal plane is formed in the same manner as the inclination angle of the protrusion 171 of the die A ₁₄ in FIG. ₃ is formed to be larger than the inclination angle θ ₂ of the protrusion 191, so that the support body 192
The outer diameter of the die is also smaller than that of the die _A14 in FIG.

When the die A ₁₆ moves in the direction of the arrow B, the protrusion 195 acts as a relief surface that reduces the contact resistance against the material 201, and the amount of deformation of the material 201 is significantly reduced compared to the case shown in FIG. . That is, FIG. 23b is a diagram showing the advancing direction of the die A ₁₆ shown in a to be the front direction, and of the tangent line between the protruding part 195 and the support body 192, the part in contact with the material 201 is shown at 196. The amount of deformation for pushing the material 201 apart is reduced by the hatching portion γ compared to the die _A14 in FIG. Therefore, it is possible to save the power for pushing the material apart corresponding to the amount of deformation γ of the material.

As explained above, the die of the present invention can significantly reduce the amount of extrusion molding work and reduce the driving power of the stranded wire manufacturing apparatus compared to conventional dies. That is, the work performed by extrusion molding according to the present invention will be explained below using the embodiment shown in FIG. The work of the die A ₁ is the work of cutting through the material 201, and the work of friction when the wire passes through the bearing part 44. Comparing this with the conventional example shown in FIG. 24, first, it is no longer necessary to mount the die on the slope of the rotary head 8, so the rotary head 8 no longer has to work through the material 201.
Next, since the bell section 300 and the reduction section 301 are no longer present, there is no longer any work to cause distortion there. Also, the work of the die A ₁ itself to cut into the material has increased, but this is a small increase because the cutting blade 49 scrapes off the material. In addition, die
If the biting depth of the material 201 of _A1 is shallow enough to allow the cutting blade 49 to enter, this work will become smaller over time. Although the work increases because the bearing portion 44 is longer than before, it has almost no effect. In addition to the above, there are also differences in the range in which plastic flow occurs. That is, in the past, the semicircular area shown in FIG. 24 was wide, but in the present invention, only a narrow area in front of the cutting edge 49 is sufficient, and from this point of view as well, the amount of work is significantly reduced. Therefore, the driving power of the stranded wire manufacturing device also becomes smaller.

Further, since the raw material is processed by both plastic flow and cutting with a cutting blade, the raw material can be easily transformed into a strand, and a strand with an excellent appearance can be provided.

In addition, dies with oblique cutting edges as shown in FIGS. 9, 12, 15, and 18, and dies with oblique cutting edges as shown in FIGS. 10, 13, 16, and 19 In the die in which the receptacle is formed in the upper end opening of the protruding part, the formability of the wire is improved compared to the die shown in FIG. 7, and the bearing part can be shortened to reduce the power required for forming.

Also, FIGS. 11 to 13, and 17 to 1
As shown in FIG. 9, the die in which the cross section of the bearing portion is formed into an oval shape has the effect of increasing the roundness of the cross section of the strand compared to the die shown in FIG. 7, in which the cross section of the bearing portion is a perfect circle.

Further, in a die having a rake face facing the cutting edge as shown in FIGS. 14 to 19, the durability of the cutting edge can be increased and the life span can be extended.

Furthermore, as shown in Fig. 20, a die in which a notch is formed in the protruding part and the bearing part is formed short has the effect of reducing the power required for cutting and forming, and increasing the durability of the cutting blade. be.

Furthermore, when mounting the die on the die holder by increasing the inclination angle of the die as shown in FIG. 21, compared to the mounting method shown in FIG. 8, the formability including the roundness of the wire is improved,
The bearing part can be shortened, the power required for cutting and forming is reduced, and the durability of the cutting blade is increased.

Furthermore, as shown in FIGS. 22 and 23, when the die has a notch on the side surface of the support or a relief surface formed on the protrusion, the cutting time is reduced when mounted on the die holder as shown in FIG. 21. This has the effect of significantly reducing power.

[Brief explanation of drawings]

Figures 1 and 2 are partially cutaway perspective views of a cutting forming machine part of a continuous stranded wire manufacturing device, and Figure 3 shows an example of a conventional cutting die, a is a plan view thereof, and b is an A of a. -A sectional view, FIG. 4 is an explanatory diagram showing another example of a conventional cutting die, FIGS. 5 and 6 are perspective views showing an example of a conventional facing die, and FIG. 7 is a die of the present invention. 1 shows an embodiment of the present invention, in which a shows a plan view thereof and b shows a front view thereof. 8 is a diagram showing the die of FIG. 7 mounted on the rotary head of the stranded wire manufacturing apparatus of FIG. 1, and FIGS. 9 to 19 show other embodiments of the die of the present invention, In the figure, a shows a plan view, and b shows a front view. Second
0 to 23 are diagrams showing a state in which a die showing another embodiment of the present invention is mounted on the rotary head,
In each figure, a is a state diagram seen from the front direction of the die, b
24 is a state diagram as seen from the front side of the die, and FIG. 24 is a sectional view of the conventional die. DESCRIPTION OF SYMBOLS 1... Internal rotating body, 2... External rotating body, 3... Annular groove, 4... Shoe member, 5... Material, 6... Die, 8
...Rotating head, 9...Element wire, 12...Die, 15...Material, 16...Die, 18...Cutting blade, 20...Extra fine wire, 2
2... Opening, 23... Cone, 24... Cylinder, 28... Cylinder, 30... Opening, 32... Cutting blade, 40... Opening, 4
1, 51, 61, 71, 81, 91, 103, 1
11, 121, 131, 141, 151, 16
1,171,181,191,195... protrusion,
42, 53, 63, 72, 83, 93, 104,
113, 123, 132, 143, 153, 16
2,172,182,192...Support, 49,5
0,60,70,80,90,100,110,
120, 130, 140, 150, 160, 17
0,180,190...cutting edge, 44,55,65,
74, 85, 95, 101, 115, 125, 1
34, 145, 155, 163, 173, 18
3,193...bearing part, 46,56,66,
75, 86, 96, 105, 116, 126, 1
35, 146, 156, 164, 174, 18
4,194...Release part, 52,82,112,
142...matching band, 62, 92, 122, 152...
Socket, 54, 64, 73, 84, 94, 11
4,124,133,144,154,185...
Notch, 102, 117, 127, 136, 14
7,157...Rake face.

Claims (1)

[Claims] 1. An annular groove formed between an internal rotating body and an external rotating body that rotate in the same direction, and a rotationally movable shoe member disposed relative to the outer periphery of the internal rotating body. Used in twisted wire manufacturing equipment that continuously feeds out the raw material, sends out the raw material as multiple strands by a rotating head with multiple dies arranged in a ring, and twists the multiple strands that are fed out. The die includes a conical protrusion having an opening with a cutting edge at its tip, and a columnar support connected to the base end of the conical protrusion, which is connected to the opening and is connected to the strand. A bearing part having the same cross section, a release part connected to the bearing part and gradually expanding, and an inner groove connected to the expanded end of the release part are connected to the support body etc. from the tip of the protruding part. A cutting molding die for producing stranded wire, characterized in that the die extends through the end of the support along the central axis of the support.