JPS59105872A - Apparatus for application of paint onto filament body - Google Patents

Abstract

PURPOSE:To freely perform washing and servicing, by attaching a supporting plate, a coil spring and a die each made of a magnetic material with magnets, and specifying the structure of the nozzle of said die. CONSTITUTION:A supporting plate 14 and a coil spring 22 above a coating tank 13 are made of a magnetic material, the upper end of the coil spring 22 is attached to the supporting plate 14 with the first magnet 20, and a die 25 is attached to the lower end of the coil spring 22 with the second magnet 23. In addition, the difference s between the caliber of the nozzle of said die 25 at its outlet and the diameter of a filament body is determined in relation with the difference h between the caliber of the nozzle at a position m entering into 20% of the length l of the die 25 from its inlet opening and the diameter of the filament body, so as to adjust the ratio of h/s to 1.5-20. Hence, the attached magnets can be freely seperated. Consequently, washing or servicing these parts can be freely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to an apparatus for applying paint to a filament, particularly an insulating paint to a filament by a floating die method using a die having a unique hole structure. The present invention relates to a coating device.

(b) Conventional technology A device for applying paint to a striatum using a floating die method is a system in which the die is supported in a floating state on the paint and passed through the striatum. According to this method, even if the striatum Even if large lateral vibrations or small lateral vibrations occur, the die follows the movement, which has the advantage that the paint can be applied evenly. Therefore, it can be said that the floating die method is more advantageous in terms of uniform application of paint than the fixed die method in which the filament is passed through the filament while the die is fixed.

Various methods have been known to make the die float, but in all of them, when the viscosity of the paint or the linear velocity of the filament changes, the floating conditions of the die change, so the die or its studs change each time. Therefore, the weight of the holder must be adjusted, which causes a problem in that workability is very poor.

As one means for solving this problem, a paint coating device shown in FIG.
(See Publication No. 81). That is, a guide cylinder 4 that is similar to the through hole 3 is fixed to the lower surface of the support plate 2 fixed to the upper part of the paint tank 1.
The upper end of a coil spring 5 is loosely fitted inside the guide tube 4, and a die 6 is fixed to the lower end.

The paint application device with this unique structure increases the apparent weight of the die by balancing the elastic force of the coil spring 5 and the floating blade acting on the die 6, and selects an appropriate elastic modulus of the coil spring 5. by paint7
Even if the viscosity changes depending on the type or temperature change, or the wire diameter or wire speed changes, there is an advantage that the die 6 can be maintained in a predetermined floating state without replacing the coil spring 5 or the die 6.

On the other hand, as for the die 6, conventionally, as shown in FIG. 2, a structure in which the die hole 8 is wide open at its population 9 and sharply narrows near the exit 10 is used. . In this case, a, the difference between the hole diameter at the die hole exit 10 and the diameter of the filament 11 is δ, and b, the hole diameter at the position m which is 20% of the die length l from the die hole entrance 9 and the diameter of the filament 10. When the difference from the diameter is h, the conventional die 6 has a very large ratio of h to δ, h/δ, for example, 60 or more.

(c) The point to be solved by the invention: The floating die coating device shown in FIG. 1 has a die 6 fixed to the lower end of the coil spring 5. It is inconvenient to clean the die 6 after finishing the coating work or to remove it for inspection.

Further, since the guide tube 4 is fixed to the lower surface of the support plate 2, cleaning and maintenance work may be difficult when the inner surface becomes dirty with paint or the like.

Furthermore, during the wire threading operation before putting the paint 7 into the paint tank 1, the coil spring 5 has fallen to the bottom of the paint tank 1 as shown by the chain line in the figure, so the paint 7 into the tank, compress the coil spring 5 and release the die 6.
When the coil spring 5 is lifted up, it is difficult to smoothly insert the coil spring 5 into the guide tube 4. Particularly when the number of filaments 11 is large and the coating is repeated many times, the workability becomes extremely poor.

On the other hand, regarding the structure of the die 6 itself, the aforementioned ratio h/δ is 6.
In the case of conventional dice that exceed 0, the striatum 11
Even if the center axis of the filament 11 and the center axis of the die 6 are shifted from each other due to minute vibrations, slight left/right movement of the die 6, inclination, etc., the cap that tries to return it to its original position will not move. Because the force is extremely small (that is, the self-aligning ability is small),
The paint 7 is attached to the striatum 11 while it is eccentric or continues to change.
As a result, the cured film may have an uneven thickness.

As described above, in the prior art, both the coating device and the die have various spots, and the advantages of the floating die type coating device cannot be fully utilized.

(d) Means for Solving the Problems Therefore, the present invention forms the support plate and the coil spring provided on the upper part of the paint tank from a magnetic material, and interposes a first magnet between the two to attach the coil spring to the support plate. At the same time, a second magnet is fixed above the die, and the die is accommodated at the lower end of the coil spring by activating the magnet, and the above-mentioned ratio h/δ is set to 1.5 or more in the structure of the die hole. 20 or less.

With the above configuration, it is possible to freely separate or assemble the attracted portion by the magnet, and it is also possible to obtain an apparatus for applying paint to a linear body using a floating die method with a large self-aligning ability.

(E) Embodiment FIGS. 3 to 5 show a first embodiment of the present invention, and FIG. 6 shows a second embodiment.

In the first embodiment, a paint tank 13 and a support plate 14 are fixed to the fixing base 12, and a through hole 1 is formed in the bottom of the paint tank 13.
5, which penetrates the filament 16 and is pulled out upward.

The support plate 14 is made of a magnetic material, has a through hole 17 through which the filament 16 passes, and has a recess 18 centered around the through hole 17 on its lower surface. The recess 1
8 includes a first disk-shaped magnet 20 having a through hole 19 in the center.
are perfectly fitted and adsorbed.

Further, a recess 21 centered on the medical passage hole 19 is provided on the lower surface of the magnet 20, and the upper end of the coil spring 22 is fitted into the recess 21 and attracted thereto.

A second disk-shaped magnet 23 is attached to the lower end of the coil spring 22.
is adsorbed. This disk-shaped magnet 23 has a recess 2 on the top surface.
4, the lower end of the coil spring 22 is fitted into the recess 24, and a through hole 26 is provided in the center of the hole 8 (see FIG. 2) of the die 25. dice 25
is made of a magnetic material and is attracted to the magnet 23, or is made of a non-magnetic material and fixed to the magnet 23 with an adhesive or the like.

Further, as shown in FIG. 4, the die 25 has a shape in which the hole 27 is symmetrical about the central axis, and the hole diameter does not decrease continuously from the hole outlet 28 to the hole inlet 29. is doing. In addition, for the hole 27, the difference between the hole diameter and the filament diameter at the hole outlet 28 is δ, and the difference between the hole diameter and the filament diameter at a position m, which is 20% of the die length l from the hole entrance 29, is δ. h, the ratio h/δ is 1.5 or more 2
It is set to 0 or less, preferably 2 or more and 15 or less.

Next, in FIG. 5, the die 25 shown in FIG. 4 is loaded into the apparatus shown in FIG.
The state is shown in which the wire is passed through the die 25, the second magnet 23, the coil spring 22, the first magnet 20, and the support plate 14 in order from the bottom and is advanced upward. A large amount of paint 30 attached to the filament 16 is squeezed by the die 25, but due to the shear stress caused by the viscosity of the paint 30,
The dice 25 are pulled up in the advancing direction of the filament 16 and stopped in a state balanced with the elastic force of the coil spring 22, so that the dice 25 become in a floating state.

In the apparatus of the above embodiment, even if the progression of the filament 16 is stopped upon completion of the coating operation, the die assembly, that is, the second magnet 23 fixed to the die 25, the coil spring 22, and the first magnet 20 are not mutually connected to each other. These magnets 23 and 20 are connected by the attraction force and are attracted to the support plate 14, so that
It will not fall into the paint tank 13. Moreover, when cleaning these parts, it is sufficient to apply a force greater than the attraction force of the magnets 23 and 20 to separate the parts.

[Experimental example and results regarding the die 25] The die 25 as shown in FIG. 4 was made with h/δ varied from 1 to 60, and the diameter was 0.5 mm using the floating die method.
Polyvinyl formal varnish was applied to a 7 mm copper wire and baked. The film eccentricity of the completed power supply is set at 1 m intervals by 50
Point measurements were taken and the average value was determined. The results are shown graphically in FIG.

The black circles in the figure indicate measured values.

Incidentally, the film eccentricity here refers to the film thickness ratio (maximum film thickness/minimum film thickness) in the cleaning body formed by coating and curing the paint.

As can be seen from the above experimental results, the film eccentricity decreases significantly when h/δ is in the range of 1.5 to 20.

In addition, regarding the shape of the hole opening in the longitudinal section including the center axis of the die hole, there are cases in which it is convex inward, convex outward, linear, or a combination of these, and the shape of the die hole Regarding the hole shape of the part with a length equivalent to 20% of the die length, there are cases where the cut shape of the vertical cross section including the central axis of the die hole is convex inward, convex outward, and linear. , or a combination of these.

As a result, it was found that the film eccentricity changed only depending on the value of h/δ. Any shape may be used as long as the die hole 27 is symmetrical about the center axis and the die hole diameter does not decrease continuously from the die hole outlet 28 to the die hole population 29.

In addition, in the second embodiment shown in FIG.
The coil spring 22, the first magnet 20, and the support plate 14 are made to pass through each concealing hole, and the upper end of the coil spring 22, the first magnet 20, and the support plate 14 are made to protrude a required length above the support plate 14. be done.

The tubular body portion 31 functions to guide the coil spring 22 so that it contracts stably when the coil spring 22 contracts.

(e) Effects Since the present invention has the above-described configuration, the magnetic attraction portion of the die assembly consisting of the die, magnet, and coil spring can be separated, and the attachment of the magnet to the support plate can be freely separated. These can be cleaned and maintained freely and have excellent workability.

Further, since the die has a unique hole structure, it has a high self-aligning ability and therefore has the effect of providing a good coating uniformity.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional example, Fig. 2 is an enlarged sectional view of a conventional die, Fig. 3 is a sectional view of the first embodiment, and Fig. 4 is an enlarged sectional view of the die used in the first embodiment. , FIG. 5 is a sectional view of the first embodiment in use, FIG. 6 is a sectional view of the second embodiment in use, and FIG. 7 is a graph of experimental results. 13... Paint tank, 14... Support plate, 16... Line condition, 17... Through hole, 1B... Recess, 19... Through hole, 20... First magnet, 21... recess, 22...
・Coil spring, 23...second magnet, 24...recess,
25...Dice, 26...Through hole, 27...Dice hole, 2B...Hole exit, 29...Hole inlet, 30...
・Paint, 31... Pipe body patent applicant: Sumitomo Electric Industries, Ltd. Agent: Fumiji Kamata Procedural amendment (voluntary) October 7, 1980 Commissioner of the Patent Office Kazuo Wakasugi 1, Indication of the case 1982 Patent Application No. 215928 2, Title of the invention: Apparatus for applying paint to the striatum 3, Relationship with the amended table case Patent applicant address: 5-15 Kitahama, Higashi-ku, Osaka Name (name) (213) Sumitomo Electric Industrial Co., Ltd. 4. Agent address: Mr. Osaka 1-18-12 Nihonbashi, Minami-ku Name (74
20) Patent attorney Bunji Kamata Telephone Osaka 06 (631) 0021 (representative) 5, Showa year, month, day (shipment date) 6. Number of inventions increased due to amendment7. Specification subject to amendment 8. Contents of the Amendment As shown in the attached sheet, the contents of the amendment 1 and the scope of the claims have been corrected as shown in the attached sheet. 2. We will correct "disc-shaped" to "plate-shaped" in three places on page 8, line 9, line 14, and line 15 of page 8 of the specification. 3. On the 8th page, 3rd line from the bottom, change "Hole 8 (see Figure 2)" to "
Hole 27 (see Figure 4)”. 4. On page 5, line 13, "device" is corrected to "invention." Claims (1) The upper end of a coil spring is attached to the lower surface of a support plate provided at the top of the paint tank, and a die is attached to the lower end of the coil spring, and the filament that has passed through the paint tank is connected to the die, coil spring, and support plate. In an apparatus for applying paint to a filament body using a floating die method configured so as not to penetrate and be drawn upward, the support plate and the coil spring are formed of a magnetic material, and a first magnet is interposed between them. The upper end of the coil spring is attached to the support plate, a second magnet is fixed to the upper surface of the die, the die is attached to the lower end of the coil spring via the magnet, and the difference between the hole diameter at the hole exit of the die and the filament is is characterized by forming the ratio h/δ to 1.5 or more and 20 or less, where δ is the difference between the hole diameter and the striatal diameter at a position 20% of the die length from the hole entrance. A device for applying paint to the striatum. (2) A recess corresponding to the through hole is provided on the underside of the support plate,
2. The apparatus for applying paint to a linear body according to claim 1, wherein a first plate-shaped magnet having a through-hole coaxial with the through-hole is fitted into the recess by attraction. (3) The linear body according to claim 1 or 2, characterized in that the opposing surfaces of the first magnet and the second magnet have recesses into which the upper and lower ends of the coil spring fit. paint application equipment. (4) The tube body part of the die, whose upper part has a protruding tube shape, is passed through the second magnet, the coil spring, the first magnet, and the support plate, and at least the tube body part is sealed with a non-magnetic material. A coating device for a striatum according to claim 1. (5) Provide a recess on the bottom surface of the support plate that matches the through hole,
A first plate-shaped magnet having a through-hole in the same window as the above-mentioned through-hole is adsorbed and fitted into the recess, and a recess into which the upper and lower ends of the coil spring fit is formed on the opposing surfaces of the first magnet and the second magnet. An apparatus for applying paint to a striated body according to claim 4.

Claims (5)

[Claims] (1) Attach the upper end of the coil spring to the lower surface of the support plate provided at the top of the paint tank, and attach a die to the lower end of the coil spring. In an apparatus for applying paint to a filament body using a floating die method, the support plate and the coil spring are formed of magnetic paulownia material, and a first magnet is interposed between the two, and the coil spring is attached to the support plate. Attach the upper end and fix a second magnet to the upper surface of the die, valve the magnet to fit the die to the lower end of the coil spring, and calculate the difference between the hole diameter at the hole exit of the die and the filament as δ, A filament body characterized in that the ratio h/δ is 1.5 or more and 20 or less, where h is the difference between the hole diameter and the filament diameter at a position 20% of the die length from the hole entrance. Paint application equipment. (2) A recess corresponding to the through hole is provided on the underside of the support plate,
Paint application to a thin strip body according to claim 1, characterized in that a disk-shaped first magnet having a through hole (1) in the same window as the above-mentioned blocking hole is fitted into the recess by adsorption. Device. (3) The linear body according to claim 1 or 2, characterized in that the opposing surfaces of the first magnet and the second magnet have recesses into which the upper and lower ends of the coil spring fit. paint application equipment. (4) The body part of the die whose upper part has a protruding tube shape is passed through the second magnet, the coil spring, the first magnet, and the support plate, and at least the tube body part is formed of a non-magnetic material. A coating device for a striatum according to claim 1. (5) Provide a recess on the bottom surface of the support plate that matches the through hole,
A first disc-shaped magnet having a through hole coaxial with the through hole is fitted into the recess by attraction, and a recess into which the upper and lower ends of the coil spring are fitted is formed on the opposing surfaces of the first magnet and the second magnet. 5. The apparatus for applying coating to the striatum according to claim 4, characterized in that the apparatus has a coating apparatus.