KR20160071596A - Apparatus for Coating PTFE Automatically - Google Patents

Abstract

The present invention relates to an apparatus for automatically applying polytetrafluoroethylene (PTFE), capable of automatically recognizing a supplied base steel plate and automatically uniformly applying PTFE according to a designated pattern. The apparatus for automatically applying PTFE has a spray application region (1) to supply PTFT powder to a base steel plate material transferred on a conveyer, a control panel region (2) disposed on one side of the spray application region (1), and a material transfer region (3) disposed below the spray application region (1). The apparatus for automatically applying PTFE comprises: a spray unit (10) horizontally movable in the spray application region (1); a pair of cable veyors (20,30) allowing the spray unit (10) to be horizontally moved; a material transfer conveyer (40), disposed in the material transfer region (3), supplying the base steel plate material along a lower portion of the spray application region (1); a material sensor installed in front of the spray application region (1); and a supply speed adjusting unit (60) disposed in a front end portion of the material transfer conveyer (40). Upon recognizing whether the base steel plate material is introduced from the material sensor, the control panel region (2) adjusts a driving speed of the material transfer conveyer (40) through the supply speed adjusting unit (50) and guides a movement path of the spray unit (10) according to a preset pattern using the pair of cable veyors (20,30).

Description

[0001] Apparatus for Coating PTFE Automatically [

The present invention relates to an automatic PTFE coating apparatus. More particularly, the present invention relates to a technique of automatically recognizing a base steel sheet supplied to uniformly coat a PTFE thin film on a base steel plate forming an oilless bearing and automatically applying PTFE according to a designated pattern.

Conventionally, in the process of coating Teflon on a base steel plate which forms an oilless bearing, it has been difficult to adjust the thickness of the Teflon coating film smoothly as it proceeds through application of spray of an operator and thus it is difficult to obtain uniform coating conditions.

As a result of observing the surface of the product coated with Teflon on the base steel plate by manual operation, the defects in the subsequent process are increased as the deviation of the Teflon coating thickness along the surface area of the base steel plate becomes larger.

PTFE (Polytetrafluoroethylene) is a fluororesin, which is available from DuPont Teflon and ICI Fluon. PTFE is excellent in chemical resistance and does not change its characteristics over a wide temperature range. It is used for cases of heaters for plating and heat exchangers. PTFE is good in electric characteristics, has good non-flammability and weatherability, is non-tacky, has low wear coefficient, and is non-toxic. In addition, it is used for inner lining of a mold using a chemical resistance, belt, roll, mold releasing property, a frying pan in kitchen products, and an inner surface lining of an ice maker.

Recently, in the development of thin films of PTFE materials, attempts to secure product competitiveness by developing surface treatment technology to achieve a thickness of about 15 ± 10 (㎛) have been achieved through improvement of defect rate, cost reduction through thin film surface treatment and quality assurance have.

On the other hand, the PTFE coating has a higher unit cost than the ordinary powder coating, but is excellent in heat resistance, corrosion resistance and releasability, and is advantageous to be applied to the entire industry. However, the thickness variation is very large when applied in an inappropriate manner. There is a problem that it becomes a factor that adversely affects.

In the case of the usual heat-treated coating, it is heated and dried at 180 to 220 ° C. In the case of the PTFE coating, heat treatment is performed at a high temperature of 300 ° C. or more. In the process of coating the PTFE material on the base steel plate, Processes have a significant impact on the quality measure.

As a conventional document which suggests a coating apparatus for stably forming a coating film on the surface of a flat single piece member, reference is made to Registration No. 10-0369571 (Jan. 13, 2003).

In this document, a coating method capable of forming a stable and uniform coating film on the supplied coated member with good reproducibility without damaging the characteristics of the die coater such as economical efficiency, high-precision thin film coating ability and hermeticity of the coating liquid, However, there is a limit in that PTFE is applied on a base steel plate through a manual operation in the related art, but there is no limitation to disclose a method for preventing water-based cohesion and carbonization phenomenon due to lapping of coating liquid, have.

(Patent Document 1) KR10-0369571 B

In order to uniformly coat a PTFE thin film on a base steel plate constituting an oilless bearing, the present invention automatically recognizes a base steel plate to be automatically fed and uniformly applies PTFE The present invention has been made to solve the above problems.

In order to achieve the above object, an automatic PTFE coating apparatus according to the present invention includes a spray coating area 1 for supplying PTFE powder onto a bottom steel plate conveyed by a conveyor, a spray coating area 1 disposed on one side of the spray coating area 1, And a material transferring region 3 disposed on the lower side of the spray applying region 1. The PTFE automatic applying apparatus has a control panel region 2, An injection unit (10); A pair of cable bearings (20, 30) enabling horizontal movement of the injection unit (10); A material conveying conveyor (40) for feeding the base steel sheet material along the lower portion of the spray application area (1) while being disposed on the material conveyance area (3); A material detection sensor installed at a front end of the spray application region 1; And a feed rate control unit 50 disposed at a front end of the material conveyance conveyor 40. The control panel region 2 recognizes whether or not the base steel plate material is inputted from the material detection sensor, The driving speed of the material conveying conveyor 40 is controlled through the feeding speed adjusting unit 50 and the moving path of the injection unit 10 is controlled in a predetermined pattern by using the pair of cable bearers 20, Guide.

The pair of cable bearings 20 and 30 includes a first cable bearer 20 for moving the injection unit 10 along the X axis in the feeding direction of the bottom steel plate material, And a second cable bearer (30) for moving along a Y axis which is a direction orthogonal to the transport direction, wherein the predetermined pattern is a direction in which the Y axis is moved in the process of repeatedly moving the jet unit (10) along the X axis A predetermined interval of the injection unit 10 along the X-axis in a first pattern for setting the predetermined interval movement of the injection unit 10 or a repeated movement of the injection unit 10 along the Y- And a second pattern for setting the movement.

The supply speed adjusting unit 50 includes a drive motor 56, a speed reducer 52 connected to the drive motor 56, and a power transmission belt 54 connecting the speed reducer 52 and the material conveying conveyor 40. [ (54) to feed the PTFE powder onto the bottom steel plate material conveyed by the conveying conveyor (40) to adjust the conveying speed of the bottom iron plate material on the material conveying conveyor (40).

The automatic PTFE coating apparatus of the present invention as described above can dispense the problems of the conventional passive PTFE coating and adjust the PTFE application pattern, spacing, and time so as to more precisely apply the PTFE coating solution to solve coating defects, The base steel plate is automatically recognized and the PTFE can be uniformly applied automatically in accordance with the designated pattern, whereby the accuracy of application is greatly improved.

In the case of coating with the pattern according to the present invention, the phenomenon of poor coating due to the over-coating of the conventional manual work is greatly reduced and the quality of the prototype is improved.

When the porosity is measured on the surface area in the coated state according to the present invention, the number of pores of the pores is small, which means that the coating film deviation is small and the coating stability of the product is excellent when the present invention is used. That is, in the case of the conventional passive process, the variation of the coating film is large and the number of the pores is very large. However, when the present invention is applied, it can be seen that the coating layer is stable and excellent.

1 is a configuration diagram of an automatic PTFE coating apparatus according to an embodiment of the present invention,
Fig. 2 is a plan view of Fig. 1,
Figure 3 is a side view of Figure 1, and
4 is a schematic diagram showing a connection relationship between the Teflon supply pipe, the air supply pipe, and the application gun.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of other various forms of implementation, and that these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know completely. Wherein like reference numerals refer to like elements throughout.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected,""coupled," or "connected. &Quot;

1 is a side view of FIG. 1, and FIG. 4 is a cross-sectional view showing a connection relationship between a Teflon supply pipe, an air supply pipe, and a coating gun according to an embodiment of the present invention. Fig.

The PTFE automatic coating apparatus according to the present invention can uniformly coat Teflon on a base steel plate that forms an oilless bearing, and will be described below. However, the present invention is not limited to this, and a process for applying a material other than Teflon, And may be applied to various application processes in a manufacturing process.

As shown in FIGS. 1 to 3, the automatic PTFE coating apparatus according to the present invention includes a spray coating area 1 for spraying PTFE powder with uniform thickness on a base steel sheet fed to the lower side, 1, a control panel region 2 for controlling the feed rate of the underlying steel sheet material, the injection pattern of the PTFE powder and the injection amount, etc., a material for supplying the bottom steel sheet material to the lower side of the spray application region 1, A transfer region 3 and a firing region 4 for performing a sintering process on a bottom metal plate coated with PTFE powder.

The present invention is characterized in that a separate material detection sensor (not shown) is provided at the front end of the spray application region 1 to detect the front end and the rear end of the base metal plate material fed and fed to the base metal plate material By confirming the length, it is possible to supply the PTFE powder effectively. Accordingly, it is possible to reduce the movement loss due to a plurality of base steel plates continuously supplied with a time difference.

The automatic PTFE coating apparatus according to the present invention includes an injection unit 10 movable along a horizontal direction in a spray application region 1, a first cable feeder 10 for moving the injection unit 10 along a feed direction of a base metal plate material, (20), a second cable feeder (30) for moving the ejection unit (10) along a direction orthogonal to the conveying direction of the bottom steel plate material, and a second cable feeder A material feeding conveyor 40, a feeding speed regulating part 50 for controlling the feeding speed of the bottom metal plate material supplied to the spray application area 1 in a state of being disposed at the front end of the material conveying conveyor 40, A base plate 60 for supporting the first and second cable bearings 20 and 30, the injection unit 10 and the material conveying conveyor 40 at a lower portion of the spray coating area 40, In the deployed state, And a PTFE supply unit 70 for containing the paint.

In the present invention, the conveying direction of the base steel sheet material is set to the X axis and the direction perpendicular to the conveying direction of the base steel sheet material is set to the Y axis with reference to the horizontal plane as the upper surface of the material conveying conveyor 40. [

The injection unit 10 employs a gun type injection nozzle 12 so as to have an excellent arrival rate in order to ensure a uniform surface of the PTFE coating thickness formed on the bottom steel plate material. The spray nozzle 12 may be, for example, an automatic spray gun type. Specifically, RP AUTO GUN of the SATA company can be selected to increase the degree of completion of final spraying.

The invention enables free horizontal movement of the injection unit (10) over the spray application area (1) through the combination of the first and second cable bearings (20, 30). That is, by controlling the movement of the first cable bearer 20 in the X-axis direction and the movement of the second cable bearer 30 in the Y-axis direction, The injection unit 10 can be positioned on any point of the injection unit 10. On the other hand, the movement of the injection unit 10 in the upper and lower direction can be made possible by providing a separate ascending / descending unit as required.

The feed rate control unit 50 adjusts the feed rate of the base metal plate material in combination with the material feed conveyor 40.

The supply speed regulating section 50 includes a drive motor 56, a speed reducer 52 connected to the drive motor 56 and a power transmission belt 54 connecting the speed reducer 52 and the material conveying conveyor 40 do.

The base plate 60 is disposed at a lower portion of the material conveying conveyor 40. When the base plate 60 is coated on the base steel plate material in this state, the remaining material of the coating material, which is a coating material flowing along the side of the material conveying conveyor 40, . That is, the base plate 60 is connected at its lower end with a PTFE residue outlet 62, which allows collection of the PTFE residual material through the PTFE residue outlet 62.

The PTFE supply unit 70 includes a supply body 71 containing a PTFE paint, a regulator 72 installed through the inside and outside of the supply body 71, and a regulator 72 disposed at a distance from the regulator 72, And an agitator 74 installed inside and outside.

Embodiments of the coating pattern using the PTFE automatic coating apparatus according to the present invention are as follows. The pattern to be described later is program patterning by adopting a method in which the redundancy of the application interval is small and the arrival rate is excellent.

The programmed predetermined pattern may include a first pattern for setting a constant spacing of the injection unit 10 along the Y axis in a process of repeatedly moving the injection unit 10 along the X axis, And a second pattern for setting a constant interval movement of the injection unit 10 along the X axis in the process of causing the nozzle 10 to move repeatedly.

In the case of the first pattern, as a pattern which can be applied centrally along the X axis which is the conveying direction of the base steel sheet material, a good coating surface is ensured by appropriately setting the overlapping interval along the Y axis.

In the case of the second pattern, a good application surface can be ensured by appropriately setting the overlapping interval along the X axis, which is the transport direction of the base steel sheet material, as a pattern that can be centrally applied along the Y axis. In the case of the above pattern, it can be used when the length of the base steel plate material is considerably larger than the width, and it is possible to maintain the excellent coating quality by controlling the feeding speed and the coating speed.

Hereinafter, the process of applying the PTFE particles through the injection nozzle 12 of the injection unit 10 will be described with reference to FIG.

The injection nozzle 12 is connected to the PTFE supply line 82, the air spray line 84, and the air control line 86 where the regulator 72 is disposed. An air regulator 88 is connected to the three lines 82, 84, 86. The air flowing through the air regulator 88 in the process of supplying the PTFE particles from the regulator 72 to the injection nozzle 12 through the PTFE feed line 82 is supplied to the injection nozzle 12 through the air spray line 84, The air control line 86 controls the air pressure or the amount of air supplied through the valve on / off process. The air regulator 88 regulates the operation of the regulator 72 and the agitator 74 based on the amount of air supplied.

The automatic PTFE coating apparatus of the present invention as described above can dispense the problems of the conventional passive PTFE coating and adjust the PTFE application pattern, spacing, and time so as to more precisely apply the PTFE coating solution to solve coating defects, The base steel plate is automatically recognized and the PTFE can be uniformly applied automatically in accordance with the designated pattern, whereby the accuracy of application is greatly improved.

It is to be understood that the terms "comprises", "comprising", or "having" as used in the foregoing description mean that the constituent element can be implanted unless specifically stated to the contrary, But should be construed as further including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as falling within the scope of the present invention.

10: injection unit
20: First Cable Bayer
30: 2nd Cable Bayer
40: Material conveying conveyor
50: Feed rate regulator
60: base plate
70: PTFE supply part

Claims (3)

A control panel region (2) arranged on one side of the spray application region (1), and a lower side of the spray application region (1) for supplying PTFE powder onto a base metal plate conveyed by a conveyor In the PTFE automatic dispensing apparatus having the material transferring region (3)
The PTFE automatic coating apparatus includes:
A spraying unit (10) horizontally movable in the spray application area (1);
A pair of cable bearings (20, 30) enabling horizontal movement of the injection unit (10);
A material conveying conveyor (40) for feeding the base steel sheet material along the lower portion of the spray application area (1) while being disposed on the material conveyance area (3);
A material detection sensor installed at a front end of the spray application region 1; And
And a feed rate control unit (50) disposed at a front end of the material conveyance conveyor (40)
The control panel region 2 recognizes whether or not the base steel sheet material has entered from the material detection sensor, adjusts the driving speed of the material conveyance conveyor 40 through the feed rate control unit 50,
A pair of cable bearers (20, 30) for guiding a movement path of the injection unit (10) in a predetermined pattern,
PTFE automatic application device.
The method according to claim 1,
The pair of cable bearings 20 and 30 includes a first cable bearer 20 for moving the injection unit 10 along the X axis in the feeding direction of the bottom steel plate material, And a second cable feeder (30) for moving along a Y axis which is a direction orthogonal to the feeding direction,
The predetermined pattern may include a first pattern for setting a constant interval movement of the injection unit 10 along the Y axis in a process of repeatedly moving the injection unit 10 along the X axis, And a second pattern for setting a constant interval movement of the injection unit (10) along the X axis in a process of repeatedly moving the injection unit (10)
PTFE automatic application device.
The method according to claim 1,
The supply rate regulator (50)
A driving motor 56, a speed reducer 52 connected to the driving motor 56 and a power transmission belt 54 connecting the speed reducer 52 and the material conveying conveyor 40, Which adjusts the feeding speed of the base steel sheet material on the material conveying conveyor 40,
PTFE automatic application device.

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