A high viscosity insulating paint fine line painting mold

Abstract

The present invention belongs to the technical field of enameled wire processing, and specifically relates to a high-viscosity insulating varnish fine wire painting mold. The mold sleeve cavity of the present invention comprises a tapered hole guide cavity, an equal-diameter connecting cavity, and an installation cavity for placing a mold core, which are arranged in sequence from back to front, and a paint discharge hole is provided through the equal-diameter connecting cavity. The present invention provides a paint discharge hole at the equal-diameter connecting cavity of the mold sleeve so that the insulating varnish can be discharged from the hole, so that the insulating varnish inside the paint storage bag can circulate, which is beneficial to reducing the internal pressure and preventing wire breakage.

Description

Technical Field

[0001] The invention belongs to the technical field of enameled wire processing, and in particular relates to a high-viscosity insulating varnish fine wire painting die. Background Art

[0002] The traditional felt production process cannot meet the large-capacity wire-winding requirements due to the limitations of the pay-off and take-up machines. The bubbles are uneven during the painting process, defects are easily generated, it is not environmentally friendly, the uniformity of the paint film thickness cannot be guaranteed, and only low-viscosity paint can be used. The ordinary continuous wire drawing and die painting production process uses high-solid content insulating varnish, which leads to high viscosity, poor fluidity, and high pressure inside the paint storage capsule. Therefore, when producing small-sized enameled wires, especially enameled wires with fine wire diameters, enameled wire breakage and severe mold wear are very likely to occur, which need to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a high-viscosity insulating paint fine line painting mold; the present invention arranges a paint discharge hole at the equal-diameter connecting cavity of the mold sleeve to allow the insulating paint to be discharged from the hole, so that the insulating paint inside the paint storage bag can circulate, which is beneficial to reducing the internal pressure and preventing wire breakage.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A high-viscosity insulating paint fine line painting mold, including a mold sleeve, characterized in that: the mold sleeve cavity includes a tapered hole guide cavity, an equal-diameter connecting cavity and an installation cavity for placing a mold core arranged in sequence from back to front, and a paint discharge hole is provided through the equal-diameter connecting cavity, and the diameter of the paint discharge hole satisfies the following formula:

[0006]

[0007] in:

[0008] D p is the diameter of the paint discharge hole;

[0009] n is the number of paint discharge holes;

[0010] D d is the aperture of the equal diameter connecting cavity;

[0011] D m is the diameter of the die hole.

[0012] Preferably, two coaxial paint discharge holes formed by radially penetrating the mold sleeve constitute a group of hole path units, and the hole path units are more than two groups and are arranged in sequence along the axis of the mold sleeve.

[0013] Preferably, the mold sleeve is made of polycrystalline material.

[0014] Preferably, the aperture of the small diameter end of the tapered hole guide cavity is equal to the aperture of the equal diameter connecting cavity.

[0015] Preferably, a spherical annular protrusion is coaxially provided on the outer wall of the mold sleeve, and the center of the sphere formed by the annular protrusion is located on the axis of the mold sleeve.

[0016] The beneficial effects of the present invention are:

[0017] 1) On the basis of the traditional painting mold, by arranging an equal-diameter connecting cavity in the shape of an equal-diameter channel and setting a paint discharge hole at the equal-diameter connecting cavity, excess insulating paint can be discharged from the hole, so that the insulating paint inside the paint storage bag can circulate, which is beneficial to reduce the internal pressure and prevent the occurrence of problems such as enameled wire breakage and severe mold wear.

[0018] In actual measurement, not only will excessive internal pressure lead to problems such as broken wires, but too low internal pressure will also lead to uneven painting and insufficient paint layer thickness, which will result in quality failing to meet design requirements. In response to this, the present invention further limits the diameter of the paint drainage holes based on the setting formula on the basis of setting the paint drainage holes, and achieves an optimal balance between the diameter and number of the paint drainage holes, so that the paint pressure reaches the optimal point, avoiding many problems caused by excessive or too low paint pressure.

[0019] In addition, no matter how the paint discharge holes are selected, the number must be arranged at least two, that is, at least two, because: in a single-hole design, there is no air circulation, and the paint liquid will produce negative pressure blockage and poor circulation at the paint discharge hole, and even in turn will further affect the normal flow of the paint liquid at the mold core, thereby affecting the product quality, which is not allowed. In view of this, the present invention arranges more than two paint discharge holes to form at least one paint outlet and at least one vent, thereby ensuring the smooth discharge function of the paint liquid under huge painting pressure, and is more conducive to ensuring the circulation flow and decompression effect of the insulating paint inside the paint storage bag.

[0020] 2) The present invention can not only avoid the phenomenon of fine wire breaking due to excessive pressure during the insulating paint coating process as mentioned above, but also improve the slow paint flow rate caused by the excessive space of the paint storage bag. Under normal use of the present invention, the enameled wire produced can achieve a stable and high-yield effect, effectively improve production efficiency, save production costs, and increase mold life, with significant results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 and Figure 2 It is a structural cross-sectional view of the present invention.

[0022] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0023] 10-die sleeve 11-cone hole guide cavity 12-equal diameter connection cavity 13-installation cavity

[0024] 14-Paint drain hole 15-Annular protrusion

[0025] 20- mold core 30- sintered body DETAILED DESCRIPTION

[0026] For ease of understanding, here we combine Figure 1-2 The specific structure and working mode of the present invention are further described as follows:

[0027] The specific embodiment structure of the present invention refers to Figure 1-2 As shown, it consists of a mold sleeve 10, a mold core 20 located at the front end of the mold sleeve 10, and a sintered body 30 used to fix the mold core 20 to improve the working strength of the mold core 20; when working, the enameled wire or even the wire core enters the mold sleeve 10 through the rear end of the barrel cavity to the front end, and the purpose of uniform painting is achieved through the mold hole of the mold core 20 installed at the front end of the barrel cavity of the mold sleeve 10.

[0028] During actual installation, the entire cavity of the mold sleeve 10 is as follows: Figure 1-2 As shown, it includes a tapered hole guide cavity 11, an equal-diameter connecting cavity 12, and an installation cavity 13 for placing the mold core 20, which are arranged in sequence from back to front. The small-diameter end aperture of the tapered hole guide cavity 11, the aperture of the equal-diameter connecting cavity 12, and the large-diameter end aperture of the sintered body 30 are equal to each other, so that the insulated wire can pass smoothly. On the basis of the above structure, the present invention also radially penetrates four paint drainage holes on the equal-diameter connecting cavity 12. The four paint drainage holes are coaxially arranged in pairs, that is, the two coaxial paint drainage holes 14 formed by radially penetrating the mold sleeve 10 are a group of hole path units, and the hole path units are two groups and are arranged in sequence along the axis of the mold sleeve 10.

[0029] In specific design, the aperture of the paint discharge hole 14 at the above-mentioned hole path unit needs to satisfy the following formula:

[0030]

[0031] in:

[0032] D p is the aperture of the paint discharge hole 14;

[0033] D d is the aperture of the equal-diameter connecting cavity 12;

[0034] D m It is the diameter of the mold hole at the mold core 20.

[0035] The above four paint discharge holes 14 have two groups of hole units in total; at this time, the front group of hole units form a paint outlet designed on demand, and the rear group of hole units form a vent to ensure the smooth discharge of the paint liquid under the huge painting pressure, which is more conducive to ensuring the circulation and decompression effect of the insulating paint inside the paint storage bag. Of course, the aperture of the paint discharge hole 14 needs to be less than or equal to the aperture of the equal-diameter connecting cavity 12 to ensure the normal operation of the paint discharge hole 14.

[0036] Furthermore, during processing, the mold sleeve 10 can use polycrystalline material and abandon traditional felt coating, so the production process is more environmentally friendly and the service life is increased.

[0037] In addition, in actual design, considering the installation matching effect between the mold sleeve 10 and the mold platform, it can be considered to coaxially convexly provide a spherical annular protrusion 15 on the outer wall of the mold sleeve 10, so as to play a role in quickly fixing the mold sleeve 10. Figure 1-2 As shown, the center of the sphere formed by the annular protrusion 15 is located on the axis of the mold sleeve 10, so as to ensure the timely self-adjustment function of the inlet and outlet line angles of the present invention, thereby improving the reliability and stability of the painting process.

[0038] Example 1

[0039] When the same production line is upgraded, the finished products coated with insulating paint are recorded in real time using the same insulating paint, and the conventional painting mold and the painting mold of the present invention are painted. The following table shows:

[0040] Conventional paint mold This paint mold Minimum painting specifications 0.150 0.110 Record start and end time 2022.5.12-2022.5.22 2022.5.22-2022.6.2 Number of disconnections 21 times 3 times Is the line disconnected? Average 2 times / day Average 0.3 times / day

[0041] Table 1, Comparison of finished products coated with insulating paint

[0042] It can be seen from Table 1 that, with the paint mold of the present invention, under the same paint liquid and even the same production line conditions, and even when the wire diameter is finer, the wire breakage rate is significantly reduced, indicating that the fine wire breakage phenomenon can be effectively reduced, so as to further save production costs.

[0043] In addition, the existence of the paint discharge hole 14 also ensures the normal flow of the high-viscosity insulating paint in the paint storage bag of the painting mold, reduces its internal pressure, and is beneficial to improving production efficiency, increasing the service life of the mold, and making production more environmentally friendly, with significant results.

[0044] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0045] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0046] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A high-viscosity insulating varnish fine line painting die, comprising a die sleeve (10), characterized in that: The cylindrical cavity of the mold sleeve (10) comprises a tapered hole guide cavity (11), an equal diameter connecting cavity (12) and an installation cavity (13) for accommodating a mold core (20) arranged in sequence from back to front. A paint drain hole (14) is provided through the equal diameter connecting cavity (12). The diameter of the paint drain hole (14) satisfies the following formula: in: D p is the diameter of the paint discharge hole (14); n is the number of paint discharge holes (14); D d is the aperture of the equal-diameter connecting cavity (12); D m is the aperture of the die hole; The aperture of the small diameter end of the tapered hole guide cavity (11), the aperture of the equal diameter connecting cavity (12) and the aperture of the large diameter end of the sintered body (30) are equal to each other so that the insulated wire can pass smoothly.

2. A high-viscosity insulating varnish fine line painting mold according to claim 1, characterized in that: Two coaxial paint discharge holes (14) formed by radially penetrating the mold sleeve (10) form a group of hole path units. The hole path units are more than two groups and are arranged in sequence along the axis of the mold sleeve (10).

3. A high-viscosity insulating varnish fine line painting mold according to claim 1 or 2, characterized in that: The mold sleeve (10) is made of polycrystalline material.

4. A high-viscosity insulating varnish fine line painting mold according to claim 1 or 2, characterized in that: A spherical annular protrusion (15) is coaxially provided on the outer wall of the mold sleeve (10), and the center of the sphere formed by the annular protrusion (15) is located on the axis of the mold sleeve (10).

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