JPS6118576Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new segmented metal die for coating enameled wire.

Generally, enameled wires are manufactured by repeatedly applying enamel paint to a conductor 5 to 15 times, squeezing, and baking. The drawing methods for enamel paint include felt drawing, roller die drawing, and metal die drawing. The felt drawing method and the roller die drawing method are extremely easy to wire in the enamelled wire manufacturing setup work, but it is very difficult to maintain a constant amount of paint applied.
On the other hand, since the metal die drawing method uses a metal fixed hole die, it is extremely easy to maintain a constant amount of paint applied. However, on the other hand, when using metal dies, it is necessary to sequentially insert one die into each coated line during enamelled wire manufacturing setup work, which requires a large number of man-hours and generates a large amount of lead wire waste.

From this point of view, various split metal dies with excellent die-hanging workability have been studied. However, since conventional split metal dies are designed with emphasis only on die-hanging workability, they have poor enamelability and are hardly ever put into practical use.

The object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a split metal die for enameling wire coating, which has good die-hanging workability and excellent enamel coating properties.

The gist of the present invention is to provide a split metal die for enameling wire coating with a vertically split tapered die chip having a cutout in the radial direction, and whose upper inner circumferential surface is in contact with the outer surface of the tapered part of the vertically split tapered die chip. a cylindrical upper holding jig that is tapered in contact with each other and has a threaded groove on its lower inner circumferential surface; and a cylindrical upper holding jig that has a cutout in the radial direction and whose upper outer circumferential surface engages with the threaded groove of the upper holding jig. The present invention is characterized in that the vertically split tapered die chip is gripped and fixed by a lower holding jig having matching thread grooves so that the tapered end side of the vertically split tapered die chip protrudes from the upper surface of the upper holding jig. .

Next, according to the drawing, one of the split metal dies of the present invention is shown.
Explain an example.

FIG. 1 shows an example of the split metal die of the present invention. FIG. 1a is a longitudinal cross-sectional view showing the state of application and squeezing of enamel paint during manufacture of enameled wire using one example of the split metal die of the present invention. That is, in FIG. 1a, after the enameled wire conductor 5 is coated with the enamel paint 4, the excess enamel paint is squeezed out with a vertically divided tapered die chip 1.
This figure shows the state in which it then heads to the baking furnace located above the die.

FIG. 1b shows a plan view of one example of the split metal die of the present invention, in which 1 is a vertically divided tapered die tip, 2 is an upper holding jig, and 6 is the radius of the upper holding jig 2. This is the cut in the direction. 1st
As shown in Figures a and 1b, the upper holding jig 2 has a cutout part 6 in the radial direction, and the upper inner peripheral surface thereof is tapered so as to come into contact with the outer periphery of the tapered part of the vertically split tapered die chip 1. It is a cylindrical holding jig which has a threaded groove on its lower inner circumferential surface.

Fig. 1c shows a bottom view of one example of the split metal die of the present invention, in which 1 is a vertically divided tapered die tip, 3 is a lower holding jig, and 6 is the radius of the lower holding jig 3. This is the cut in the direction. 1st
As shown in FIG. a and FIG. 1c, the lower holding jig 3 has a cutout in the radial direction, and its upper outer peripheral surface has a thread groove that engages with the thread groove of the upper holding jig 2, and Its lower inner circumferential surface is tapered to expand downward. The reason why the lower inner circumferential surface of the lower holding jig 3 is tapered to expand downward is to facilitate the introduction of the enamel paint into the die.

FIG. 1c shows a plan view of a tapered die chip 1 which is vertically divided into two parts, and 7 is a die hole formed at the tip end of the taper. As shown in FIGS. 1a and 1b, the vertically two-split tapered die chip 1 can be divided into two vertically, and when integrated, the tip side of the taper forms a die hole 7. . Since the vertically divided tapered die chip 1 comes into contact with the enameled wire conductor 5 through the enamel paint 4, it is suitably made of wear-resistant cemented carbide metal, such as die steel or sintered metal.

The radial cutting portions of the upper holding jig 2 and the lower holding jig 3 are provided to improve wire hanging workability during enamelled wire manufacturing setup work, and the opening width is set to fit the enamel wire to be worked on. Although determined by the wire conductor diameter, the commonly used opening width is 2 to 20 mm. Further, the material of the upper holding jig 2 and the lower holding jig 3 may be general steel, copper alloy, or the like.

Next, a wire threading procedure for setting up enamelled wire production using the split metal die of the present invention will be explained.

In the wire setting operation of the split metal die of the present invention, first, the upper holding jig 2 is lined from the radial cutout part 6, and then the vertically split tapered die tip 1 is attached so that the tapered tip side is connected to the upper holding jig 2. Insert it so that it protrudes from the top surface, and finally insert the lower holding jig 3.
from the cutout part 6 in the radial direction, and then tighten the screws to the upper holding jig 2 while pushing up the vertically bisected tapered die tip 1,
Strongly integrate the three parties. The integrated split metal die of the present invention is fixed by screwing the upper holding jig 2 and the lower holding jig 3, and the tip side of the vertically split tapered die chip 1 is pulled in the enamelled wire drawing direction, which is advantageous. Demonstrates excellent enamel paintability. Further, when enameled wire is manufactured using the divided metal die of the present invention, the work of removing the die is easy, and the work of cleaning the removed die is extremely easy because it is divided into three parts.

The vertically split tapered die chip 1 to be incorporated into the split metal die of the present invention must have its tapered tip end protruding from the upper surface of the upper holding jig 2. This is to minimize the area around the die hole to eliminate defects in the appearance of the enameled wire due to falling and adhesion of dust floating in the enameled wire baking furnace. This is also to facilitate inspection around the die hole.

The split metal die of the present invention has an upper holding jig 2,
It consists of a vertically 2-split tapered die chip 1 and a lower holding jig 3, and a split metal die with an arbitrary die hole diameter can be prepared by simply replacing the vertically 2-split tapered die chip 1.
Therefore, the split metal die of the present invention can significantly reduce die manufacturing costs.

As described in detail above, the split metal die of the present invention has extremely good die-hanging workability, die cleaning properties, and enamel painting properties, and furthermore, the die manufacturing cost can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 shows an example of the split metal die of the present invention, Fig. 1a is a longitudinal cross-sectional view showing an enamelled wire coating state, Fig. 1b is a plan view, and Fig. 1c is a bottom view. , FIG. 1d is a plan view of the vertically divided tapered die chip 1. As shown in FIG. 1: Vertical 2-split tapered die chip, 2:
Upper holding jig, 3: Lower holding jig, 4: Enamel paint, 5: Enamel wire conductor, 6: Radial cut portion, 7: Die hole formed by a vertically bisected tapered die tip.

Claims (1)

[Scope of utility model registration request] In a split metal die for coating enameled wire, a vertically 2-split tapered die chip 1 has a cutout part 6 in the radial direction, and the upper inner circumferential surface of the die chip has a tapered part 1 that is in contact with the outer periphery of the tapered part of the vertically 2-split tapered die tip. A cylindrical upper holding jig 2 having a threaded groove on its lower inner circumferential surface, and a cylindrical upper holding jig 2 having a cutout part 6 in the radial direction and its upper outer circumferential surface engaging with the threaded groove of the upper holding jig 2. With the lower holding jig 3 having a thread groove,
A split metal die for coating enameled wire, characterized in that the tapered die chip 1 is gripped and fixed in such a way that the tapered end side of the vertically split tapered die chip 1 protrudes from the upper surface of the upper holding jig 2.