KR100600032B1 - Method of producing roller for cleaning and moving flat panel display - Google Patents

Abstract

Carbon fiber pipe is inserted into Teflon tube and compressed by heat shrinking process to reduce the weight of the shaft and greatly reduce the amount of warpage deformation caused by its own weight. LCD, PDP and organic EL have excellent heat resistance, chemical resistance and excellent rigidity. Disclosed are a cleaning roller and an industrial feed roller for a thin film display panel. The industrial roller of the thin film display panel comprises a hollow carbon fiber pipe; Teflon tube surrounding the outer circumferential surface of the carbon fiber pipe to form an outer skin layer; And a shaft made of steel or polymer synthetic resin, such as stainless steel, which is inserted and fixed to both sides of the hollow carbon fiber pipe by an adhesive.

LCD, PDP, Thin Film Display Panel, Carbon Fiber, Teflon Tube, Heat Shrink

Description

Industrial roller of thin-film display panel and its manufacturing method {METHOD OF PRODUCING ROLLER FOR CLEANING AND MOVING FLAT PANEL DISPLAY}

1 is a cross-sectional view showing a roller manufactured according to a method for manufacturing an industrial roller of a thin film display panel according to the present invention;

2 is a process chart showing a manufacturing method of a roller according to the present invention;

3a schematically illustrates a method of polishing a roller using an abrasive film;

3b schematically illustrates a method of polishing a roller using abrasive stone; And

4 is a cross-sectional view showing a cleaning roller according to the present invention.

<Description of the symbols for the main parts of the drawings>

10 roller 20 carbon fiber pipe

25 concave portion 30 Teflon tube

40: shaft 45: stepped portion

60: brush part

The present invention relates to an industrial roller of a thin film display panel and a method of manufacturing the same, and more particularly, by inserting a carbon fiber pipe into a teflon tube and thermally contracting the teflon tube, thereby reducing the total weight and dramatically reducing the amount of warpage deformation caused by its own weight. The present invention relates to an industrial roller of a thin film display panel and a method for manufacturing the same, which can be reduced and have heat resistance, chemical resistance and excellent rigidity.

In general, during the manufacturing process of a thin film display such as LCD, PDP, organic EL, etc., rollers are used to clean the surface of the thin film display panel or to transfer the thin film display panel. Rollers made of pipes or rollers made by inserting the outer circumferential surface of a carbon fiber pipe into a stainless pipe have been used.

Modules of thin-film displays currently being produced are being enlarged, and cleaning or conveying rollers have to be lengthened to clean or convey the panels of such large thin-film displays. However, as the length of the roller increases, the self-weight of the roller increases, and therefore, the deflection amount also increases due to the concentrated load applied to the center of the roller.

As such, when the weight of the roller increases or the amount of deflection increases, the surface of the thin-film display panel cannot be cleaned evenly, and the surface is subjected to a considerable load, thereby damaging the surface of the display panel or overloading the product. It can happen.

Therefore, as the panel of the thin-film display is enlarged in size, there has been a continuous demand for development of a roller capable of effectively cleaning or transporting it.

Republic of Korea Patent No. 10-0430553 (2004.04.26) discloses a method for manufacturing a composite roller. The manufacturing method of the composite roller relates to a roller that can be used as a roller and the like of the film production line, and a manufacturing method thereof, cylindrical fiber-reinforced composite tube; A metal tube inserted in close contact with an outer circumferential surface of the fiber reinforced composite material tube; And a plating layer formed on the surface of the metal tube. The composite roller according to the present invention is lighter than the roller made of conventional steel and has good damping characteristics against vibration, thereby increasing productivity by increasing the rotational speed, and the rotational moment of inertia is constant, and the surface roughness is constant, thus conveying the film. When used or wound, the sliding phenomenon can be greatly reduced without damaging the surface of the film.

However, since the patent uses a metal tube as a reinforcing material, there is a disadvantage in that the weight cannot be reduced as much as desired. In addition, there is a disadvantage that the metal plating layer is peeled off in the secondary processing step of manufacturing the application.

SUMMARY OF THE INVENTION An object of the present invention is to provide an industrial roller and a method of manufacturing the thin film display panel which can significantly reduce the weight by using carbon fiber material, and also greatly reduce the amount of bending rigidity over the entire length.

Another object of the present invention is to provide an industrial roller and a method of manufacturing the thin film display panel excellent in non-tackiness, low friction, insulation, heat resistance and chemical resistance.

Still another object of the present invention is to provide an industrial roller and a method of manufacturing the same for a thin film display panel, which can greatly reduce the manufacturing process and manufacturing cost.

In order to achieve the above objects, the industrial roller of the thin film display panel according to the present invention, the hollow carbon fiber pipe; Teflon tube surrounding the outer circumferential surface of the carbon fiber pipe to form an outer skin layer; And a shaft inserted and fixed by an adhesive at both ends of the hollow carbon fiber pipe and made of steel or polymer synthetic resin.

Both ends of the carbon fiber pipe inside is formed as a concave portion, characterized in that the step portion having an outer diameter smaller than the outer diameter of the shaft is formed so that one end of the shaft is easily inserted into the carbon fiber pipe.

The brush portion is mounted on the outer circumferential surface of the Teflon tube.

Method for producing an industrial roller of a thin film display panel according to the present invention comprises the steps of preparing a hollow carbon fiber pipe; Inserting and fixing a shaft made of steel or a polymer synthetic resin using adhesives at both ends of the carbon fiber pipe; Preparing a teflon tube having an inner diameter larger than an outer diameter of the carbon fiber tube; Inserting an outer circumferential surface of the carbon fiber pipe into the teflon tube; And performing thermal contraction by performing hot air drying or heat drying in a state in which the outer circumferential surface of the carbon fiber pipe is inserted into the teflon tube.

The preparing of the carbon fiber pipe may further include polishing an outer circumferential surface of the carbon fiber pipe to improve roundness, concentricity and straightness of the roller.

After the heat shrink step, further comprising the step of polishing the surface of the roller.

Hereinafter, an industrial roller and a method of manufacturing the same in a thin film display panel according to the present invention will be described in detail with reference to the accompanying drawings. The objects and constructional features of the present invention will become more apparent from the accompanying drawings and the description of the detailed and preferred embodiments of the present invention described below. In addition, it is to be noted that the same to similar parts in the drawings are described with the same to similar reference numerals for convenience of description and understanding.

1 is a cross-sectional view showing a roller manufactured according to a method for manufacturing an industrial roller of a thin film display panel according to the present invention.
The industrial roller includes a cleaning roller for cleaning the display panel, and a transfer roller for transporting the display panel.

As shown in FIG. 1, the roller 10 manufactured according to the present invention comprises a hollow carbon fiber pipe 20 and a teflon tube 30 surrounding the outer circumferential surface thereof to form an outer skin layer. At this time, the shaft 40 is inserted and fixed to both sides of the hollow carbon fiber pipe 20 by an adhesive.

The shaft 40 is preferably made of steel, such as stainless steel, or a polymer synthetic resin.

At this time, both ends of the carbon fiber pipe 20 is formed with a concave portion 25, and one end of the shaft 40 is also easily inserted into the carbon fiber pipe 20 and fixed to the shaft 40. A stepped portion 45 having an outer diameter smaller than the outer diameter of) is formed. Therefore, the stepped portion 45 of the shaft 40 is stably coupled to the recess 25 of the carbon fiber pipe 20 by an adhesive.

The adhesive may be an epoxy resin.

Figure 2 is a process chart showing a manufacturing method of the roller according to the present invention, the manufacturing method will be described in detail as follows.

(1) carbon fiber pipe preparation step (S1)

The raw material for making carbon fiber pipes is made by prepreg impregnating carbon yarn with epoxy resin in one direction. It then consists of the cutting of the bias layer which determines the torque and the cutting of the thread layer which determines the strength. High-elastic fabrics can be designed with low weight due to their high strength and low strength.

In the cut fabric, sheets of the bias layer and the thread layer are rolled into the mold by a rolling machine.

The fabrics rolled through the rolling machine are wound with a kind of film mounted on the tapping machine, which shrinks when heat is applied, thus tightening the carbon fiber pipe in the process of forming in the electric furnace to reduce the bubble phenomenon that may occur in each layer. It serves to keep the carbon fiber pipe tightly in contact.

After completion of the tapping, the carbon fiber pipe is completed in a heat treatment furnace, such as an electric furnace, for about 1 hour.

The completed carbon fiber pipe is separated from the mold through a de-core machine, and thus a hollow carbon fiber pipe is manufactured.

The carbon fiber pipe completed as described above can be used as a part of the roller itself, but may be subjected to the step of polishing the outer circumferential surface in order to more accurately roundness (cylindrical degree), concentricity and straightness (straightness) of the roller. .

(2) Shaft insertion fixing step (S2)

A shaft made of steel, such as stainless steel, or a polymer synthetic resin is inserted into and fixed at both ends of the carbon fiber pipe, and epoxy may be used as the adhesive.

(3) Teflon tube preparation step (S3)

TEFLON TUBE is a material with excellent properties such as heat resistance, chemical stability, electrical insulation, purity, and low friction coefficient.

In general, the Teflon coating is performed in the form of paint or powder, and a method of compressing and fixing the pipe by heat shrinkage by producing a tube form as in the present invention is a new technique.

Teflon tube used in the present invention is a fluoropolymer synthetic resin tube such as PTFE (Poly Tetra Fluoro Ethylene), FEP (Fluorinated Ethylene Propylene copolymer), PFA (Per Fluoro Alkoxy) or ETFE (copolymer of Ethylene and TetraFluoro Ethylene) Are manufactured.

Teflon tube of the material as described above should have an inner diameter larger than the outer diameter of the carbon fiber tube, preferably have an inner diameter of 1 to 30% larger than the outer diameter of the carbon fiber tube, more preferably 2 to 10 It is good to have a large inner diameter of%.

The thickness of the teflon tube does not matter, but is preferably within 0.5 ~ 2mm.

(4) inserting the carbon fiber pipe into the Teflon tube (S4)

The outer peripheral surface of the prepared carbon fiber pipe is inserted into the prepared Teflon tube. At this time, the Teflon tube is mounted to exceed the length of the carbon fiber pipe in consideration of the match or shrinkage.

(5) heat shrink step (S5)

Hot air drying or heat drying in the state in which the outer circumferential surface of the carbon fiber pipe is inserted into the Teflon tube causes the Teflon tube to shrink and firmly adheres to the carbon fiber pipe.

At this time, it is preferable that the temperature at the time of hot air drying or hot drying is 50-400 degreeC, More preferably, it is 100-200 degreeC.

By attaching the Teflon tube by heat shrinkage, it is not necessary to use a separate adhesive agent and the surface can be formed smoothly.

(6) Polishing and final inspection (S6)

The roller completed through the above process can be subjected to surface polishing depending on the intended use.

Surface polishing methods include super finishing using the abrasive film 80 and grinding stone using the abrasive stone 90.

3A schematically illustrates a method of polishing the roller 10 using the abrasive film 80, and FIG. 3B schematically illustrates a method of polishing the roller using the abrasive stone 90.

Table 1 shows a comparative analysis of the carbon fiber pipe and the pipe made of stainless steel.

division The present invention (carbon fiber pipe) Original (stainless steel pipe) standard Outer Diameter (mm) Inner Diameter (mm) Thickness (mm) Overall Length (mm) 74 66 4 1910 74 65.9 4.05 1910 Exam conditions Load (Kg) Load Length (mm) Support Length (mm) 100 1910 1910 100 1910 1910 result Flexural deformation (mm) 0.024 0.105 Weight (Kg) 2.28 13.3

As shown in Table 1, as a result of testing a stainless pipe having similar specifications such as outer diameter, inner diameter, thickness, and electrical length of the carbon fiber pipe of the present invention under the conditions of the same load, load length and support length, Comparing the deflection strain and the weight, the carbon fiber pipe of the present invention is 0.024mm, which shows that the deflection strain is much smaller than the 0.105mm of the conventional stainless steel pipe, the weight of the carbon fiber pipe of the present invention is 2.28Kg It can be seen that much less than 13.3Kg of conventional stainless steel pipe.

Therefore, the roller manufactured using the carbon fiber pipe of the present invention has a small total weight and a small amount of warpage, and thus can be utilized throughout the industry, and also for industrial rollers of thin-film display panels such as next-generation LCDs, PDPs, organic ELs, and the like. It can be seen that it is suitable as.

4 is a cross-sectional view showing a cleaning roller according to the present invention.

As shown in Figure 4, the cleaning roller according to the present invention is to produce a roller for cleaning a thin-film display panel such as LCD, PDP or organic EL by mounting a brush 60 to the completed roller as described above Since the technique of attaching the brush portion to the roller is a technique already known in the art, it will not be described in detail in the present invention.

Alternatively, a product such as rubber, sponge or O-ring may be mounted on the outer circumferential surface of the roller manufactured according to the present invention.

According to the manufacturing method of the industrial roller of the thin-film display panel according to the present invention, it is possible to greatly reduce the weight of the entire roller and to significantly reduce the amount of warpage deformation due to its own weight, but also has excellent stiffness. Suitable for the manufacture of industrial rollers for display panels.

In addition, the roller according to the present invention is excellent in non-tackiness, low friction, heat resistance, insulation and chemical resistance, there is an advantage that can greatly reduce the manufacturing process and manufacturing cost.

Claims (6)

delete Hollow carbon fiber pipe 20; Teflon tube 30 surrounding the outer circumferential surface of the carbon fiber pipe 20 to form an outer shell layer; And And a shaft 40 made of steel or polymer synthetic resin that is inserted and fixed to both sides of the hollow carbon fiber pipe 20 by an adhesive. Both ends of the carbon fiber pipe 20 are formed with recesses 25, and one end of the shaft 40 is easily inserted into and fixed to the carbon fiber pipe 20. An industrial roller of a thin film display panel, characterized in that a stepped portion 45 having an outer diameter smaller than the outer diameter is formed. The method of claim 2, The roller of the thin film display panel, characterized in that the brush unit 60 is mounted on the outer peripheral surface of the Teflon tube (30). Preparing a hollow carbon fiber pipe; Inserting and fixing a shaft made of steel or a polymer synthetic resin using adhesives at both ends of the carbon fiber pipe; Preparing a teflon tube having an inner diameter larger than an outer diameter of the carbon fiber tube; Inserting an outer circumferential surface of the carbon fiber pipe into the teflon tube; And And thermal contraction by performing hot air drying or heat drying in a state in which the outer circumferential surface of the carbon fiber pipe is inserted into the teflon tube. The method of claim 4, wherein The preparing of the carbon fiber pipe may further include polishing an outer circumferential surface of the carbon fiber pipe in order to improve roundness, concentricity and straightness of the roller. Manufacturing method. The method according to claim 4 or 5, After the heat shrink step, the manufacturing method of the industrial roller of the thin film display panel further comprising the step of polishing the surface of the roller.

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