CN113130145B

CN113130145B - Double-spraying paint system for enameling machine

Info

Publication number: CN113130145B
Application number: CN202110371216.9A
Authority: CN
Inventors: 陈彬; 周俊; 王亚尼; 杨晓春
Original assignee: Tongling Jingxun Special Enamelled Wire Co ltd
Current assignee: Tongling Jingxun Special Enamelled Wire Co ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2022-05-31
Anticipated expiration: 2041-04-07
Also published as: CN113130145A

Abstract

The invention belongs to the technical field of enameled wire production, and particularly relates to a double-spraying paint system for an enamelling machine. The invention comprises a die holder, wherein a first painting nozzle and a painting die are sequentially arranged in the die holder: the system also comprises a transition pipe and a head end screw, wherein lead of the head end screw vertically penetrates through the head end of the transition pipe, the die holder and the paint pipe in sequence and forms threaded fit one by one, a counter bore is vertically and upwardly concavely arranged on the bottom end surface of the head end screw, and a radial hole communicated with the counter bore is radially arranged at the side wall of the head end screw in a penetrating manner; the system also comprises a second painting nozzle, wherein the axis of the second painting nozzle is vertically arranged at the tail end of the transition pipe, and a paint outlet of the second painting nozzle is positioned on the traveling path of the lead; and the paint inlet of the second paint spraying nozzle is communicated with the pipe cavity of the transition pipe. The invention can realize the function of uniformly painting the enameled wire based on the existing enamelling machine, and finally solves the problem of paint film eccentricity frequently encountered in the production of the enameled wire at present.

Description

Double-spraying paint system for enameling machine

Technical Field

The invention belongs to the technical field of enameled wire production, and particularly relates to a double-spraying paint system for an enamelling machine.

Background

Painting, which is a process of coating wire paint on a conductive wire so as to form a uniform paint layer with a certain thickness; the general wire paint is coated for many times and baked for many times to ensure that the solvent is fully evaporated, the reaction of the paint base resin is complete, and finally a good paint film is formed. During actual operation, the number of painting passes is greatly influenced by factors such as solid content, viscosity, surface tension, contact angle and drying speed of paint liquid, and although the thickness of the paint layer can be ensured to reach the standard to a certain extent by adopting a mode of repeatedly coating for many times, the uneven thickness of the paint layer is always an inherent difficult problem which cannot be solved in the industry. The reason for this is that: because of the above factors, especially the influence of the viscosity and surface tension of the paint liquid, when the paint liquid enters the die cavity of the painting die from bottom to top along the paint pipe and infiltrates the wire moving at high speed at the opening end of the painting die from bottom to top, the contact time between the wire and the paint liquid is short, the paint layer on the lower surface of the wire body close to the paint outlet of the painting die is often thick, and the paint layer on the upper surface of the wire body is thin. The wires with the different thickness of the paint layer can generate slight eccentricity of the paint film after the next baking procedure; the multi-pass eccentric paint film has less accumulation and more quality hidden troubles caused by the subsequent generation, thereby bringing about a plurality of troubles to manufacturers and users.

Disclosure of Invention

The invention aims to provide a double-spraying painting system for an enamelling machine, which has the characteristics of flexible and convenient use and high cost performance, can realize the function of uniformly painting enamelled wires on the basis of the existing enamelling machine, finally solves the problem of paint film eccentricity frequently encountered in the production of the existing enamelled wires, and ensures that the finished product quality of the existing enamelled wires meets the actual requirement.

In order to achieve the purpose, the invention adopts the following technical scheme:

a double-spraying painting system for an enameling machine comprises a die holder, wherein a first painting nozzle for painting and a painting die for scraping paint are sequentially arranged in the die holder along the advancing direction of a lead; the first painting nozzle vertically extends downwards and penetrates through the die holder, so that the first painting nozzle is connected with a painting pipe below the die holder; the method is characterized in that: the system also comprises a transition pipe arranged in the die holder, wherein the head end of the transition pipe is fixed beside the first painting nozzle and is positioned right above the painting pipe, and the tail end of the transition pipe extends to the position right below a section of conducting wire between the first painting nozzle and the painting die; the system also comprises a head end screw, wherein lead of the head end screw vertically penetrates through the head end of the transition pipe, the die holder and the paint pipe in sequence and forms threaded fit one by one, a counter bore is vertically and upwardly concavely arranged on the bottom end surface of the head end screw, and a radial hole communicated with the counter bore is radially arranged at the side wall of the head end screw in a penetrating manner; the system also comprises a second painting nozzle, wherein the axis of the second painting nozzle is vertically arranged at the tail end of the transition pipe, and a paint outlet of the second painting nozzle is positioned on the traveling path of the lead; and the paint inlet of the second painting nozzle is communicated with the tube cavity of the transition tube, so that paint liquid in the paint tube flows into the tube cavity of the transition tube through the counter bore and the radial hole and flows out to the lead along the paint outlet of the second painting nozzle.

Preferably, after the transition pipe extends along the advancing direction of the lead, the transition pipe is vertically bent along the bottom surface of the die holder cavity and extends into the position right below the lead, so that an L-shaped pipe with two closed end pipe openings is formed.

Preferably, the transition pipe is provided with a fabrication hole convenient for drilling a pipe cavity; and a blocking cover is arranged on the fabrication hole.

Preferably, a set of double paint spraying units for painting a single wire is formed by a set of transition pipes, a set of head screws, a set of first paint spraying nozzles, a set of second paint spraying nozzles and a set of paint spraying dies, and the double paint spraying units are arranged on the die holder in parallel.

The invention has the beneficial effects that:

1) considering the influence of factors such as the surface tension of the paint liquid, the paint liquid is often not nearly full of the whole outer surface of the wire when the wire passes through the paint liquid quickly once, so that the paint layer is easy to be eccentric. Based on the structure, the invention provides the double-spraying painting structure, the primary infiltration coating of the lead is ensured through the first group of nozzles, at the moment, at least the lower surface of the lead is wetted by the paint liquid, so when the lead passes through the paint outlet of the second group of nozzles, the paint liquid can quickly pass through the lower surface of the lead and quickly infiltrate and coat the upper surface of the lead, and finally, the completely-coated infiltration painting effect on the whole outer surface of the lead is finished.

The foregoing is the basic principle of the present invention, however, in practice, the painting machine, as part of the overall painting process, is often installed extremely compactly in a small space of the overall production line; and the paint pipe is required to be painted in parallel, so the paint pipe extends along the radial direction of the wire traveling direction and is positioned right below the first group of nozzles, and the installation position of the paint pipe cannot be changed in any other way. At this time, how to design the second group of nozzles, namely the second painting nozzles, in a narrow space without additional modification and meet the basic liquid feeding requirement becomes difficult. Based on the above, the invention realizes the purpose of simple and convenient installation of the transition pipe by using the transition pipe and matching the head end screw with the fixing function and the drainage function, thereby not only ensuring the compactness and the rationality in structure, but also realizing the design requirement that the paint liquid flows from the original paint pipe to the second painting nozzle in a shunt way, and achieving multiple purposes.

In conclusion, the invention can realize the fixation of the transition pipe and the paint liquid drainage operation by adopting a special structure screw in a narrow die holder box cavity on the basis of not changing the original structure and working mode, finally realize the uniform painting function of the enameled wire on the basis of the existing enamelling machine, solve the problem of paint film eccentricity frequently encountered in the existing enameled wire production and ensure that the finished product quality of the existing enameled wire meets the actual requirement.

Drawings

FIG. 1 is a diagram of the working state of the present invention;

FIG. 2 is a cross-sectional view of the structure of FIG. 1 taken along the axial direction of the paint tube;

FIG. 3 is a top plan view of the transition duct in an assembled state;

fig. 4 is a schematic perspective view of a head screw.

The corresponding relation between each figure label and each part name of the invention is as follows:

a-wire b-frame plate

10-die holder 20-first painting nozzle 30-painting die 40-paint tube

51-transition pipe 52-head end screw 52 a-counter bore 52 b-radial hole

53-second paint spray nozzle

Detailed Description

For ease of understanding, the structure and operation of the present invention are further described herein with reference to FIGS. 1-4:

in actual operation, the painting process is actually multi-pass; that is, a plurality of sets of the die holders 10 with the painting nozzles and the painting dies 30 are placed on the horizontally arranged frame plate b, a set of the die holders 10 forms a set of processing units corresponding to a set of baking devices, the wires a are sequentially passed through the processing units, and finally, a paint film with a required thickness is formed on the surface of the wire. In the process, because the whole processing flow is long, the wire a actually needs to be bent back to enter the next processing unit again after passing through one group of processing units; in other words, in the field, a large number of die holders 10 can be mounted on the rack plate b with a small area compactly, and the trend of the paint pipe 40 and other necessary components need to be considered; it can be said that the current enameling machines are extremely sophisticated and mature in space utilization, and any minor change may involve extensive modification, resulting in huge updating cost. Meanwhile, the cramped installation space of the die cavity of the die holder 10 makes additional modification extremely difficult after the original die and the nozzle are fully filled.

In view of the above, the present invention provides a dual paint spraying mechanism suitable for the current die holder 10 without changing the structure of the original enameling machine. Specifically, a draft tube is formed by a transition tube 51 in a 7-shaped or L-shaped layout as shown in fig. 1 and 3, a secondary painting end is formed by a second painting nozzle 53, and a head screw 52 as shown in fig. 4 has both fixing and drainage functions, thereby finally achieving the purpose of secondary painting in a narrow space.

After the above components are integrally installed, as can be seen from fig. 1, the fixing function of the entire transition pipe 51 is completely assumed by the head screw 52, and since the head screw 52 vertically penetrates through the transition pipe 51, the die holder 10 and the paint pipe 40 in sequence, it is equivalent to that a branch flow passage is formed in the paint pipe 40. Of course, when the paint pipe 40 is located below the frame plate b as shown in fig. 2, the head screw 52 must also penetrate through the frame plate b. Thus, while the paint liquid is normally sprayed out along the first painting nozzle 20, the paint liquid also flows into the transition pipe 51 through the counter bore 52a and the radial bore 52b of the head screw 52 in sequence, and is finally sprayed out from the second painting nozzle 53, so as to achieve the secondary painting effect. The wire a after the secondary painting is completely soaked and coated by the paint liquid, so that the condition that the coating of the paint liquid is incomplete or uneven caused by the traditional single painting is avoided, and the effect is remarkable.

It will, of course, be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims

1. A double-spraying painting system for an enameling machine comprises a die holder (10), wherein a first painting nozzle (20) for painting and a painting die (30) for scraping paint are sequentially arranged in the die holder (10) along the advancing direction of a lead; the first painting nozzle (20) vertically extends downwards and penetrates through the die holder (10) so as to be connected with a painting pipe (40) positioned below the die holder (10); the method is characterized in that: the system further comprises a transition pipe (51) arranged in the die holder, wherein the head end of the transition pipe (51) is fixed beside the first painting nozzle (20) and is positioned right above the painting pipe (40), and the tail end of the transition pipe (51) extends to a position right below a section of conducting wire between the first painting nozzle (20) and the painting die (30); the system also comprises a head end screw (52), wherein lead of the head end screw (52) vertically penetrates through the head end of the transition pipe (51), the die holder and the lacquer pipe (40) in sequence and forms threaded fit one by one, a counter bore (52a) is vertically and upwardly concavely arranged on the bottom end surface of the head end screw (52), and a radial hole (52b) communicated with the counter bore (52a) is radially arranged at the side wall of the head end screw (52) in a penetrating manner; the system also comprises a second painting nozzle (53), wherein the axis of the second painting nozzle (53) is vertically arranged at the tail end of the transition pipe (51), and a paint outlet of the second painting nozzle (53) is positioned on the traveling path of the wire; the paint inlet of the second paint nozzle (53) is communicated with the tube cavity of the transition tube (51), so that the paint liquid in the paint tube (40) flows into the tube cavity of the transition tube (51) through the counter bore (52a) and the radial hole (52b) and flows out to the lead along the paint outlet of the second paint nozzle (53).

2. The dual spray painting system for the enameling machine according to claim 1, characterized in that: the transition pipe (51) extends along the advancing direction of the lead, then vertically bends along the bottom surface of the cavity of the die holder (10) and extends into the position right below the lead, so that an L-shaped pipe with two closed end pipe openings is formed.

3. The dual spray painting system for the enameling machine according to claim 1, characterized in that: the transition pipe (51) is provided with a fabrication hole convenient for drilling a pipe cavity; and a blocking cover is arranged on the fabrication hole.

4. The dual spray painting system for the enameling machine according to claim 1, 2 or 3, characterized in that: a set of double paint spraying units for painting a single lead is formed by a set of transition pipes (51), a set of head end screws (52), a set of first paint spraying nozzles (20), a set of second paint spraying nozzles (53) and a set of paint spraying dies (30), and the double paint spraying units are arranged on a die holder (10) in parallel.