METHOD FOR SPRAYING INSULATING MIXED PAINT

Abstract

A method for spraying insulating mixed paint, which includes the following steps: (a) arranging two atomization nozzles at a spraying device with one of the atomization nozzles spraying a main paint mist and the other one of the atomization nozzles spraying a curing agent mist; (b) adjusting spray angles of the two atomization nozzles, such that the sprayed main paint mist and curing agent mist intersect at a spray area to form a paint mixing zone in which the main paint mist and the curing agent mist are mixed; (c) adjusting nozzle flow rates of the two atomization nozzles to control a mixing ratio of the main paint and the curing agent; and (d) placing a work piece in the paint mixing zone to spray the work piece.

Claims

1. A method for spraying insulating mixed paint, comprising the following steps: (a) arranging two atomization nozzles (1) at a spraying device with one of the atomization nozzles (1) spraying a main paint mist and the other one of the atomization nozzles (1) spraying a curing agent mist; (b) adjusting spray angles of the two atomization nozzles (1), such that the sprayed main paint mist and curing agent mist intersect at a spray area to form a paint mixing zone (3) in which the main paint mist and the curing agent mist are mixed; (c) adjusting nozzle flow rates of the two atomization nozzles (1) to control a mixing ratio of the main paint and the curing agent; and (d) placing a work piece (2) in the paint mixing zone (3) to spray the work piece (2).

2. The method for spraying insulating mixed paint of claim 1, wherein a distance between the two atomization nozzles (1) is 630-700 mm.

3. The method for spraying insulating mixed paint of claim 2, wherein a distance from the work piece (2) to a connecting line between the two atomization nozzles (1) is 250-310 mm.

4. The method for spraying insulating mixed paint of claim 3, wherein an included angle between a central axis of each atomization nozzle (1) and the connecting line between the two atomization nozzles (1) is equal.

5. The method for spraying insulating mixed paint of claim 4, wherein the included angle between the central axis of each atomization nozzle (1) and the connecting line between the two atomization nozzles (1) is 30-50 degrees.

6. The method for spraying insulating mixed paint of claim 1, wherein during spraying, a plurality of work pieces (2) pass through the paint mixing zone (3) one by one, and the work pieces (2) move in a direction parallel to the connecting line between the two atomization nozzles (1).

7. The method for spraying insulating mixed paint of claim 6, wherein the work pieces (2) move at a speed of 32-38 mm/s.

8. The method for spraying insulating mixed paint of claim 6, wherein the work pieces (2) spin while passing through the paint mixing zone (3).

9. The method for spraying insulating mixed paint of claim 8, wherein the work pieces (2) spin at a speed of 30-90 r/min.

10. The method for spraying insulating mixed paint of claim 1, wherein the main paint is an epoxy resin insulating paint, and the curing agent is a polyamide paint.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present solution will be described below in detail with reference to the accompanying drawings and embodiments.

[0022] FIG. 1 shows a schematic diagram of spraying of the present solution.

DETAILED DESCRIPTION

[0023] Referring to FIG. 1, a method for spraying insulating mixed paint includes the following steps: [0024] (a) arranging two atomization nozzles 1 at a spraying device with one of the atomization nozzles 1 spraying a main paint mist and the other one of the atomization nozzles 1 spraying a curing agent mist; [0025] (b) adjusting spray angles of the two atomization nozzles 1, such that the sprayed main paint mist and curing agent mist intersect at a spray area to form a paint mixing zone 3 in which the mixing of the main paint mist and the curing agent mist is completed; [0026] (c) adjusting nozzle flow rates of the two atomization nozzles 1 to control a mixing ratio of the main paint and the curing agent; and [0027] (d) placing a work piece 2 in the paint mixing zone 3 to spray the work piece.

[0028] There are various specifications and sizes of the two atomization nozzles 1 that can be selected for the spraying device. Table 1-1 shows spray parameters of several commonly used atomization nozzles. When the work piece 2 to be sprayed has a large area, a larger amount of the spray paint is needed, and the greater the area to be sprayed is, the larger the atomization nozzle 1 required is. The two atomization nozzles 1 of the same specification are adopted.

TABLE-US-00001 TABLE 1 Spraying span of parallel pattern Air usage amount Air diameter , in Spraying quantity spraying and spraying width (during continuous Compressor mm of water in ml/min 200 mm 300 mm parallel pattern spraying) in KW 0.5 0-60 160 200 60 0.4-0.75 1.0 0-250 200 250 80 0.4-0.75 1.3 0-360 250 350 100 0.75-1.5 2.0 0-600 300 400 140 0.75-1.5
Table 1-1 shows spray parameters of commonly used atomization nozzles

[0029] Referring to FIG. 1, preferably, a distance between the two atomization nozzles 1 is 670 mm, a distance from the work piece 2 to a connecting line between the two atomization nozzles 1 (i.e., the distance din FIG. 1) is 280 mm, an included angle of a fan section sprayed by the atomization nozzles 1 is about 120 degrees, and an included angle between a central axis of each atomization nozzle 1 and the connecting line between the two atomization nozzles 1 is equal, so that the mixing effect of the main paint and the curing agent is optimized, and the mixing ratio of the main paint and the curing agent is easily adjusted. The mixing ratio of the main paint and the curing agent is controlled by controlling the nozzle flow rates of the atomization nozzles 1, i.e., by controlling a paint spraying speed of the atomization nozzles 1. For example, when the ratio of the main paint to the curing agent is 2:1, the paint spraying speed of the atomization nozzle 1 for spraying the main paint is twice that of the atomization nozzle 1 for spraying the curing agent. In order to mix the main paint and the curing agent more fully, the included angle between the central axis of the two atomization nozzles 1 and the connecting line between the two atomization nozzles 1 (i.e., the included angle in FIG. 1) is 40 degrees, which maximizes the area of the paint mixing zone 3, and not only can achieve better mixing, but also maximizes the spraying area, thereby improving the spraying efficiency.

[0030] Referring to FIG. 1, preferably, in order to better implement the automatic spraying of the work piece 2, in the spraying process, a plurality of work pieces 2 pass through the paint mixing zone 3 one by one by adopting an automatic transportation line, and the work pieces 2 are positioned and supported by clamping with a support fixture. The work pieces 2 move in a direction parallel to the connecting line between the two atomization nozzles 1, and move at a speed of 36 mm/s.

[0031] Referring to FIG. 1, preferably, the work piece 2 spins at a speed of 60 r/min while passing through the paint mixing zone 3. The work piece 2 needs to be sprayed with the insulating paint is mostly a strong-power metal hand tool, and the whole surface of the metal tool needs to be sprayed for insulation, so the tool needs to spin in the spraying process to allow uniform spraying of the paint on the surface of the tool. When passing through the paint mixing zone 3, the support fixture rotates by a friction belt.

[0032] Preferably, the main paint is an epoxy resin insulating paint, and the curing agent is a polyamide paint.

[0033] Compared with the prior art, in the present solution two atomization nozzles 1 are adopted to spray the main paint and the curing agent, respectively, and the mixing of the main paint and the curing agent is completed in the process of being sprayed to the surface of the work piece 2, such that the step of mixing and stirring the paint is eliminated. Therefore, the time for mixing the paint is saved, the spraying cost is saved, and the spraying efficiency is improved. Secondly, the main paint and the curing agent are sprayed by the two atomization nozzles 1 respectively, and will not contact each other before spraying, so that the situation in which the main paint solidifies in the pipeline of the spraying device after being mixed with the curing agent and results in pipeline blockage will not occur, thereby ensuring the normal operation of the spraying device, reducing the maintenance cost of the spraying device, making full use of the paint, and reducing the waste of the paint.

[0034] The preferred embodiments of the present disclosure have been described in detail above with reference to the drawings. However, the present disclosure is not limited to the specific details in the above embodiments, various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and these simple variations are all within the protection scope of the present disclosure.

[0035] It should be further noted that the specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not additionally illustrated in the present disclosure.

[0036] In addition, various different embodiments of the present disclosure can be randomly combined, and the combinations should also be regarded as the contents disclosed by the present disclosure as long as not deviating from the spirit of the present disclosure.