KR101887859B1 - Manufacturing method of coated cooking vessel with protective film and its coated cooking vessel - Google Patents

Abstract

The present invention relates to a method for manufacturing a coated cooking vessel having a protective film and a coated cooking vessel thereof. The method for manufacturing a coated cooking vessel comprises the following steps: mechanically treating the inside of a prepared aluminum plate to make the inside rough; pretreating the inside of the aluminum plate, having been treated to become rough, by electrolysis; forming a fluorine resin coating layer by performing spin coating of fluorine resin on the pretreated inside of the aluminum plate; drying and firing the spin-coated fluorine resin coated layer; forming a coated cooking vessel by drawing-processing the aluminum plate on which the fluorine resin coating layer has been formed; mechanically treating the outside of the molded coated cooking vessel to make the outside rough; forming a lower coating layer by coating the outside of the coated cooking vessel, having been treated to become rough, with a coating agent and drying the coating layer; obtaining the coated cooking vessel by coating the outside of the coated cooking vessel having the lower coating layer with a transparent or translucent coating agent, drying the coating agent, and firing the coating agent with the lower coating layer; and forming a fluorine resin coating layer on the inside of the aluminum plate and then forming and attaching the protective film on the fluorine resin coating layer. Total processes including manufacturing processes after the steps stated above, a process for delivering the finished coated cooking vessel to a whole or retail store, a process for displaying the finished coated cooking vessel, and a process for selling the finished coated cooking vessel to customers are performed in a condition that the protective film is attached on the fluorine resin coating layer. Accordingly, damage to the fluorine resin coating layer can be prevented until the coated cooking vessel is sold to customers after manufacturing the coated cooking vessel.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a coated cooking vessel having a protective film,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a coated cooking vessel having a protective film and a coating and cooking vessel thereof, and more particularly, will be.

Generally, aluminum is widely used as a cooking container used for cooking food, which is superior to other metals in terms of heat conductivity, handleability and moldability.

In the case of such an aluminum cooking vessel, the characteristic inherent to aluminum, that is, strength and corrosion resistance, is weak, and when it is exposed to heat or salts, discoloration or surface damage is caused. Also, since the food is easily pressed, And a coating layer is formed from various materials such as a method for manufacturing a coated cooking vessel using drawing processing and a method for manufacturing the same as disclosed in Japanese Patent Application Laid-Open No. 10-1332565.

However, in the case of coated cookware, it is necessary to prevent the scratch or damage of the coating layer, but it is necessary to prevent the scratch or damage of the coating layer. However, since the coating layer is formed during the manufacturing process of the cooking container, There is a high risk of damage.

That is, when a coating layer is formed on the inner surface during the manufacturing process of the coated cooking vessel, the coating layer may be easily damaged by contact with a related apparatus or a component when the coating layer is exposed to a subsequent working process.

In addition, even though the coating surface is not damaged and the packaging process is progressed in the remaining working process after forming the coating layer on the coating cooking vessel, even when several cooking vessels are stacked in a bulk state, when the product is delivered to a retailer, There is a fear that the coating layer is easily damaged by the collision.

In order to sell the coated cooking vessel delivered to retailers to consumers, there is a possibility that the coating layer is contaminated by the fine dust when it is displayed on the store, and the color of the coating layer may be discolored due to the exposure to infrared rays. If it is stored for a long time in a warehouse, the coating layer is oxidized and oxidized by the humid air, and when the coating layer is dirty or discolored or corroded, it is lost in commerciality and must be discarded, resulting in a financial loss.

Therefore, although the coating layer is protected by using various packaging means after the manufacture of the coating cooking container, the satisfactory results have not yet been obtained.

In other words, although most of the transparent vinyls having a thickness of 30 탆 or less are covered entirely in the coated cooking vessel to protect the coating layer, in such a case, not only the appearance is not good, but also the commerciality is deteriorated. It is a hassle to remove.

In some cases, the opaque sheet made of non-woven fabric or polyethylene is covered entirely in the coated cooking vessel to protect the coating layer. However, in this case, since the sheet is opaque and the packaged cooking vessel can not be identified, It is difficult to protect the coating layer until it is sold to the consumers after the display.

In order to overcome the disadvantages of the packaging of the coated cooking vessel using the vinyl or sheet paper, a cover made of polyethylene terephthalate in the same shape as the coated surface of the coated cooking vessel is attached to the inner surface of the coated cooking vessel, However, the scotch tape, which is a fixing means of the cover, has a weak adhesive strength to a smooth coated surface, so that the cover may be easily separated during handling to lose the protective function of the coating layer. In some cases, The cover is formed in a form that can be wrapped around the container as a whole to protect the coating layer by covering the coating container entirely. However, since there is no fear that the cover is separated during handling, the manufacturing cost of the cover is high, Urgent measures It is.

Patent No. 10-1332565 'Frying pan and its manufacturing method' Open No. 10-2017-0021186 'Method of Manufacturing Coated Cooking Container Using Drawing'

It is an object of the present invention to provide a method for manufacturing a coated cooking vessel, in which when a fluororesin coating layer is formed on the inner surface of an aluminum plate in a manufacturing process for obtaining a coating cooking vessel, a protective film is formed on the fluororesin coating layer, And a protective film adhered to the fluororesin coating layer to obtain a cooking container and allowing the consumers to easily peel and use the coated cooking container after purchasing the coated cooking container. .

In order to accomplish the above object, there is provided a method of manufacturing a coated cooking vessel having a protective film according to an embodiment of the present invention, comprising the steps of preparing a rolled aluminum plate, mechanically roughening the inner surface of the prepared aluminum plate, The inner surface is pretreated by electrolysis, the inner surface of the pretreated aluminum plate is spin-coated with fluorine resin, followed by drying and firing to form a fluorine resin coating layer. A protective film is adhered to the inner surface of the aluminum plate on which the fluorine resin coating layer is formed, The bonded aluminum plate is then drawn to form a coated cooking vessel having a desired shape. The outer surface of the coated cooking vessel is mechanically roughened to form a lower coating layer on the outer surface of the roughened coating cooking vessel A top coat layer is formed on the entire outer surface of the coated cooking vessel having a dried and undercoated layer, followed by drying Be fired together with the coating layer is characterized in that configured to obtain the finished coated cooking vessel is formed, the protective film adhered on the fluorine resin coating layer.

The present invention can reduce the material cost for protecting the fluororesin coating layer formed on the inner surface of the coated cooking vessel and the transparent protective film adhered on the fluororesin coating layer has no fear of hindering the appearance of the coated cooking vessel, In particular, since there is no risk of damaging the fluororesin coating layer during the entire process of forming the fluororesin coating layer during the manufacturing process of the coated cooking vessel and then sold to consumers, it is possible to guarantee the commerciality of the coated cooking vessel It is, of course, possible to prevent a financial loss due to the damage of the fluororesin coating layer.

Figure 1: Manufacturing process diagram of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, in describing the present invention, a general manufacturing method for obtaining a finished coated cooking vessel by drawing an aluminum plate having a coating layer formed on the inner surface thereof will not be described in detail. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the present invention, the term " aluminum " includes all aluminum alloys whose main component is aluminum.

The present invention relates to an aluminum plate preparing step (10) for preparing a rolled aluminum plate, an aluminum plate inner surface mechanical roughening treatment step (12) for mechanically roughening the inner surface of the prepared aluminum plate, An inner surface pretreatment step 14 for pretreating the inner surface of the roughened aluminum plate through electrolysis; and a step for forming a fluororesin coating layer by spin coating the inner surface of the aluminum plate, which has been pretreated through electrolysis, with a fluorine resin An aluminum plate inner surface fluororesin spin coating step (16), an aluminum plate inner surface fluororesin coating layer drying and firing step (18) for drying and firing the spin coated fluororesin coating layer, a step of drying and firing the fluororesin coating layer An inner surface protective film adhering step (20) of bonding an aluminum plate inner protective film to a protective film on the resin coating layer, and a step An aluminum plate drawing processing step (22) of drawing an aluminum plate to form a coated cooking vessel, a coated cooking vessel outer surface mechanical roughening processing step (24) of mechanically roughening the outer surface of the drawn coating vessel, An outer surface coating step (26) for forming a lower coating layer on the outer surface of the roughened surface of the coated cooking vessel, a drying step (28) for drying the coated surface of the outer surface of the coated cooking vessel to dry the coated lower coating layer, A coating-cooking vessel for forming an upper coating layer on the coating layer; and an upper coating step (30) for coating the upper coating layer and a top coating layer for drying the upper coating layer together with the lower coating layer. .

The aluminum plate preparing step (10) for preparing the rolled aluminum plate in the present invention is a step of preparing the aluminum plate for preparing the rolled aluminum plate, in which the thickness and flatness of the bottom and side surfaces required for the coated cooking container to be obtained and the properties of the pre- The selected aluminum alloy is then rolled into a plate.

It is needless to say that the outer shape of the aluminum plate may be formed into various shapes such as a disk or a rectangular plate depending on the shape of the cooking container to be obtained.

In addition, the inner surface mechanical roughening treatment step 12 of the aluminum plate for mechanically roughening the prepared inner surface of the aluminum plate increases the roughness of the inner surface of the aluminum plate by the roughening treatment using a brush or a sand blast, And to maximize the activated surface area required in the fluororesin spin coating step (16).

The present invention is not limited to the aluminum plate internal surface roughening treatment step 12 after the aluminum plate preparing step 10 and may be performed after the aluminum plate preparing step 10 and the aluminum plate internal surface roughening treatment step 12 The inner surface pattern design forming step of forming an aluminum plate physical pattern design on the inner surface of the aluminum plate prepared between the inner surface of the aluminum plate and the outer surface of the aluminum plate.

In the step of forming the inner surface pattern design of the aluminum plate, a desired pattern pattern of various patterns is stamped on the inner surface of the prepared aluminum plate using a press machine or a laser processing machine.

The inner surface pretreatment step 14 of the aluminum plate for pretreating the inner surface of the roughened aluminum plate through electrolysis includes a step of micromachining the inner surface of the mechanically roughened aluminum plate using electrolysis, And it is possible to remove various foreign substances sticking to the surface of the substrate during the previous mechanical roughening treatment step (12), maximize the mechanical roughening effect, (16), the adhesion of the fluororesin coating layer is increased so that the corrosion resistance of the coated cooking vessel is improved to prevent corrosion by the brine.

The inner surface fluororesin spin coating step 16 for forming a fluororesin coating layer by spin-coating a fluororesin on the inner surface of the pretreated aluminum plate may be carried out by spinning a nozzle or the like on the aluminum plate in a state in which the aluminum plate is rotated by the rotating means When the liquid fluororesin is supplied in an appropriate amount, the supplied fluororesin spreads radially and the inner surface of the aluminum plate is entirely coated to form a fluororesin coating layer.

The drying and firing step (18) for drying and firing the inner surface fluorine resin coating layer on the inner surface of the aluminum plate for drying and firing the spin coat-coated fluorine resin coating layer on the inner surface of the aluminum plate, The fluorine resin coating layer was re-arranged in a vitrification state by firing by applying heat of 380 to 420 ° C for at least 5 minutes to the dried fluorine resin coating layer after 7 minutes to remove water from the fluorine resin coating layer. As shown in Fig.

However, in the present invention, in order to form a fluororesin coating layer more firmly or to form a thick fluororesin coating layer in accordance with a coated cooking vessel to be obtained when forming a fluororesin coating layer on the inner surface of an aluminum plate, an aluminum plate inner fluororesin spin coating Step 16 and the aluminum plate inner surface fluororesin coating layer drying and firing step 18 may be repeated.

In addition, the step of adhering the aluminum plate inner protective film 20 for adhering the protective film on the fluorine resin coating layer coated on the inner surface of the aluminum plate is for protecting the fluorine resin coating layer by adhering a protective film on the fluorine resin coating layer. The protective film to be used is formed of a film adhesive on the back surface of a transparent film, and casting polypropylene having excellent hygienic properties, thermal adhesiveness, transparency, moisture resistance and the like is used as the material of the film, Polymer (Rubber Based Co-polymer) is used.

At this time, the thickness of the film constituting the protective film is 40 占 퐉 占 15 占 퐉, the elongation is 500% in the width direction and 700% in the length direction, and the tensile strength is the film having the characteristics of 420 kg in the width direction and 290 kg in the length direction.

If the film used is thinner than the previously given thickness and the elongation and tensile strength is low, the film is easily torn in the aluminum plate drawing process step 22. On the contrary, if the film is too thick and the elongation and tensile strength are high, Since the film is not uniformly stretched during the drawing process step 22, irregular traces are generated in the fluororesin coating layer due to the thickness variation. Therefore, the thickness, elongation, and tensile strength of the film must satisfy the above-mentioned conditions to obtain desired results.

In addition, the adhesive force of the film adhesive constituting the protective film must be able to withstand 100 ± 50 gf / 25 mm, so that under the high pressure given at the time of drying and firing of the hydraulic pressure and undercoating layer and the upper coating layer, The fluororesin coating layer can be protected without separation.

Further, in the aluminum plate drawing processing step (22) in which the protective film is adhered on the fluorine resin coating layer on the inner surface of the aluminum plate and the aluminum plate is drawn to form the coated cooking vessel, the aluminum plate is drawn To form a coating-cooking eluate having a desired shape.

However, since the aluminum plate drawing processing step (22) is performed in a state that the protective film is adhered on the fluorine resin coating layer, the tolerance of the upper and lower metal molds for drawing the aluminum plate is necessarily +15/100 to +20/100 You must.

If the tolerance of the upper and lower molds for drawing the aluminum plate is smaller than the given tolerance, the protective film may be torn. If the tolerance is larger than the given tolerance, the protective film may be peeled off. The tolerances of the molds must be determined within the tolerance range given.

In addition, the outer surface mechanical roughening treatment step (24) of mechanically roughening the outer surface of the drawn coating-coated cooking vessel is a step of roughening the outer surface of the coated cooking vessel drawn by brushing, sand blasting or the like To increase the roughness so as to maximize the active surface area required for subsequent coating of the outer surface coating step 26 of the coated cooking vessel and the coating step 30 of the outer surface of the coated cooking vessel.

The present invention is not limited to the step 24 of machining the outer surface of the cooking vessel after the step 22 of drawing the aluminum plate. The step of drawing the aluminum plate 22 and the step of mechanically roughening the outer surface of the cooking vessel And an outer surface electromagnetic induction heating layer forming step of forming an electromagnetic induction heating layer on the outer bottom surface of the coated cooking vessel drawn between the first and second heating chambers 24.

When such a coating-cooking vessel outer-surface electromagnetic induction heating layer-forming step is included, a more various kinds of coating-cooking vessels can be obtained.

In forming the electromagnetic induction heating layer in the coated cooking vessel, various means such as bonding an electromagnetic induction heating plate to the coated cooking vessel or spraying the electromagnetic induction heating material can be exemplified. Any one having an electromagnetic induction heating layer formed on the bottom surface is satisfactory.

In addition, the outer surface coating step 26 for forming the undercoating layer on the outer surface of the roughened surface of the coated cooking vessel may include a step of partially or wholly coating the outer surface of the roughened surface with a coating selected from heat- Spray coating as a whole to form a subcoat layer.

In addition, the drying step (28) for drying the undercoating layer on the outer surface of the coated cooked container for drying the undercoating layer coated on the outer surface of the coated cooked container is for forming an overcoat layer on the undercoat layer. If a heat-resistant paint is used as the undercoating agent, heat is applied at a temperature of 130-170 ° C for 10-15 minutes. If a fluorocarbon resin is used, Allow to dry for 15 minutes. If ceramic is used, heat it at 100 ~ 150 ℃ for 15 ~ 20 minutes.

However, the drying step (28) of coating the outer surface of the coated cooked container is to coat the upper coating layer on the lower coating layer. The drying step (28) of coating the outer surface of the coating cooked container ) May be eliminated.

In addition, the outer coating step (30) for coating the outer surface of the coating cooking cavity, in which a lower coating layer is formed on the outer surface of the coating cooking vessel and an upper coating layer is formed on the lower coating layer, is coated with a coating material selected from heat resistant paint made of transparent or translucent, A top coating layer for protecting the undercoat layer is formed by spray coating on the outer surface of the cooking container as a whole.

The present invention is not limited to the formation of the upper coating layer after forming the lower coating layer on the outer surface of the coating cooking vessel. It is also possible to form the upper coating layer on the outer surface of the coating cooking cavity, It is possible to further increase the commerciality of the coated cooking container to be obtained by including the coating pattern of the outer surface of the cooking cavity to form the pattern design on the outer surface of the cooking cavity.

The pattern design formed on the outer surface of the coating cooking vessel in the step of forming the outer surface pattern design of the coated cooking vessel may be a letter, a pattern, or may be partially or wholly formed on a desired portion of the outer surface of the coated cooking vessel.

However, in the present invention, when the coating cooking vessel includes the step of forming the outer surface pattern design, the outer surface coating layer drying step (28) for drying the lower coating layer after formation of the lower coating layer through the outer coating step 26 The outer surface of the outer surface of the coated cooked container may be dried at the outer surface of the outer surface of the coated container to dry the undercoated layer and the patterned design at the same time.

In addition, the outer coating layer drying and firing step (32) for coating the upper surface coating layer and the upper coating layer and the optional outer surface pattern design and firing of the lower coating layer on the upper surface coating layer are performed depending on the kind of the coating material used, The top coating layer, the pattern design and the undercoat layer were re-arranged in a vitrified state by firing by applying heat to the dried top coat layer and optional pattern design and undercoat layer. After recrystallization with cooling, solidified on the outer surface of the coated cookware Thereby forming a junction.

The drying of the top coat layer, the drying of the top coat layer, the pattern design and the baking of the undercoat layer are carried out at different temperatures and times depending on the type of coating used. When heat-resistant paint is used, To 15 minutes, and firing is carried out at a temperature of 270 to 310 ° C. for 15 to 20 minutes. When a fluororesin is used, drying is carried out at a temperature of 100 to 150 ° C. for 10 to 15 minutes, When the ceramic is used, drying is performed by heating at 100 to 150 ° C for 15 to 25 minutes, and calcining is performed at a temperature of 230 to 270 ° C for 15 to 20 minutes Minute.

After the drying and firing step (32) of coating layer on the outer surface of the coated cooking vessel, it is necessary to include a handle assembly step for assembling the handle when the handle is required according to the coated cooking container to be obtained. And a packaging step for the above-mentioned manufacturing steps. However, a detailed description of these general and ancillary manufacturing steps will be omitted.

Accordingly, the present invention provides a method of manufacturing a coated cooking vessel, which comprises spin coating a fluororesin on the inner surface of a prepared aluminum plate, and then performing a drawing process to produce a coated cooking vessel, wherein a fluororesin coating layer is formed on the aluminum plate, The entire process from adhering the film to the subsequent manufacturing process as well as the delivery of the finished coated cooking container to the retail store and the display on the retail store to the sale to the consumer is performed in a state in which the protective film is adhered on the fluororesin coating layer So that there is no possibility that the coating layer of the fluororesin is damaged until the coated cookware is manufactured and sold to consumers.

As described above, the present invention includes an aluminum plate inner pattern design forming step for forming a physical pattern design on the inner surface of the aluminum plate prepared between the aluminum plate preparing step 10 and the aluminum plate inner surface mechanical roughening processing step 12 Or for forming an electromagnetic induction heating layer on the outer bottom surface of the coated cooking vessel drawn between the aluminum plate drawing processing step 22 and the cooking vessel outer surface mechanical roughening processing step 24, And may include a step of forming an induction heating layer, and may include a step of forming a pattern design on the outer surface of the coated cooking vessel between the step (28) of drying the outer coating layer of the coated cookware and the step (30) A pattern design forming step may be included, and the scope of the right is not limited to the above-described embodiment and the accompanying drawings It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

(10) -Aluminum plate preparation step
(12) - Aluminum plate inner surface roughening treatment step
(14) - Aluminum plate inner surface pretreatment step
(16) - Aluminum plate inner surface fluorine resin spin coating step
(18) - Aluminum plate inner surface fluoropolymer coating layer drying and firing step
(20) - Aluminum plate inner protective film adhesion step
(22) - Aluminum plate drawing processing step
(24) - Coated cooking vessel Outside surface Mechanical roughening treatment step
(26) -coated cooking vessel outer coating step
(28) - drying step of outer coating layer of coated cooked container
(30) -coated cooking vessel outer surface coating step
(32) - Coating of outer surface of cooked container top coating layer drying and calcination step

Claims (9)

An aluminum plate preparing step (10) for preparing an aluminum plate having a desired thickness and appearance, an aluminum plate internal surface roughening treatment step (12) for mechanically roughening the prepared aluminum plate inner surface, a roughened aluminum plate An inner surface pretreatment step (14) of pretreating an inner surface of the aluminum plate by electrolysis, an aluminum plate inner surface fluororesin spin coating step (16) of forming a fluororesin coating layer by spin coating a fluororesin on the inner surface of the pretreated aluminum plate, An aluminum plate inner surface fluororesin coating layer drying and firing step (18) for drying and firing the coated fluororesin coating layer, and an aluminum plate inner surface for adhering a protective film on the baked fluororesin coating layer after drying and firing of the fluororesin coating layer A protective film adhering step (20), drying and firing of the fluororesin coating layer, and drawing an aluminum plate to mold the coated cooking vessel An aluminum plate drawing processing step (22), a cooking vessel external surface mechanical surface roughening processing step (24) for mechanically roughening the external surface of the drawn coating coated cooking vessel, a step of heat- An outer surface coating step 26 for coating a selected coating material selected from the group consisting of a fluorine resin, a fluorine resin, and a ceramic to form a lower coating layer; a drying step 28 for drying a coating outer surface coating layer for drying the coated lower coating layer; A top surface coating step (30) for forming a top coating layer by coating a coating agent selected from heat-resistant paint, fluororesin and ceramic on the outer surface of the formed cooking vessel and further comprising a transparent or translucent coating agent, and drying the top coat layer, And a coating layer drying and firing step (32) on the outer surface of the cooking vessel for firing the lower coating layer, The protective film used in the plate inner surface protective film adhering step 20 is formed of a rubber based co-polymer on the back surface of a transparent film made of casting polypropylene having excellent hygienic properties, wherein the protective film is formed of a film adhesive composed of a polymer and a polymer. delete The film according to claim 1, wherein the protective film has a thickness of 40 탆 15 탆, an elongation of 500% in the width direction and 700% in the longitudinal direction, and a tensile strength of 420 kg in the width direction and 290 kg in the length direction ≪ / RTI > wherein the protective film has a protective film. The method according to claim 1, wherein the adhesive force of the film adhesive constituting the protective film is 100 ± 50 gf / 25 mm. The coated cooking vessel as claimed in claim 1, wherein the tolerance of the upper and lower dies for drawing the aluminum plate in the aluminum plate drawing processing step (22) is +15/100 to +20/100. Gt; An aluminum plate is prepared by rolling an aluminum alloy, the inner surface of the prepared aluminum plate is mechanically roughened, the inner surface of the roughened aluminum plate is pretreated through electrolysis, and a fluorine resin is spin-coated on the inner surface of the pretreated aluminum plate And then drying and firing to form a fluororesin coating layer. A protective film is adhered to the baked fluororesin coating layer, and an aluminum plate is drawn to form an inner surface of the fluororesin coating layer to which the protective film is adhered, The outer surface of the coated cooking vessel is mechanically roughened, and the outer surface of the roughened surface of the outer surface of the roughened surface is coated with a coating composition selected from heat resistant paint, fluororesin and ceramic, A heat-resistant paint, a fluororesin, and a ceramic Wherein the coating film is formed by coating a top coat layer using a coating agent made of a transparent or semi-transparent material and then drying and baking the coating layer together with the undercoat layer, wherein the protective film comprises a film made of cast polypropylene, Wherein a film adhesive composed of a copolymer (Rubber Based Co-polymer) is formed. delete The film according to claim 6, wherein the thickness of the film constituting the protective film is 40 占 퐉 占 15 占 퐉, the elongation is 500% in the width direction and 700% in the longitudinal direction, and the tensile strength is 420kg in the width direction and 290kg in the length direction Characterized in that the protective film has a thickness of at least 10 mm. The coated cooking vessel according to claim 6, wherein the adhesive force of the film adhesive constituting the protective film is 100 ± 50 gf / 25 mm.

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