KR20180129095A - Manufacture method of film for home appliance - Google Patents

Abstract

The present invention relates to a method for producing a film for home appliances, the resin melting step in which a resin as a material of a film is melted in an extruder; A resin extrusion step in which molten resin is extruded through a nozzle; And a pattern forming and cooling step in which the extruded resin in a liquid state is pressed and cooled while passing through a plurality of cooling rollers and a three-dimensional pattern is formed on the resin, wherein at least one of the plurality of cooling rollers has a concavo- In the pattern forming and cooling step, the resin in the liquid state is pressed by the cooling rollers on which the pattern forming section is formed, and the pattern is formed and cooled. According to such a method for producing a film for a home appliance, the production process of a film having a three-dimensional pattern is simplified, and the manufacturing cost is reduced.

Description

[0001] The present invention relates to a film for home appliance,

The present invention relates to a method for producing a film for home appliances.

BACKGROUND OF THE INVENTION [0002] In recent consumer electronic devices, a film having a color of a hue or a patterned film is attached in order to enhance the appearance or to respond to customer's taste.

The pattern formed on the film may be formed by printing a pattern, or may be three-dimensionally formed by embossing and embossing.

As a method for producing the film, a calendering method can be used. The calendering method is a method in which a resin as a material of a film is extruded and then pressed between rollers to produce a film having a desired thickness.

On the other hand, as a method of forming a three-dimensional pattern on a film, there can be used a method in which a separate frame on which a pattern having a negative or positive angle is formed is pressed on an extruded resin to form a pattern and then the frame is separated.

Korean Patent Laid-Open Publication No. 10-2012-0086620 (Aug. 03, 2012), which is a prior art document, discloses a method in which a separate patterning film on which an engraved pattern is formed is put into a space between a first roll and a second roll together with an extrudate, And a method of producing a patterned film for separating the patterned film.

However, according to the manufacturing method as in the prior art, it is necessary to manufacture a separate patterning film in order to produce a patterned film, thus increasing the manufacturing cost.

Further, since a separate apparatus for separating the patterning film from the patterned film is required, there is a problem that the manufacturing cost is further increased.

In addition, when the roller provides a cooling function for cooling the extrudate, as the patterning film is positioned between the extrudate and the roller, the contact between the extrudate and the roller is blocked so that the extrudate is not effectively cooled, There is a falling problem.

It is an object of the present invention to provide a method for manufacturing a film for a home appliance in which molding and cooling of a three-dimensional pattern are simultaneously performed on an extruded resin, and a three-dimensional pattern is formed so that the efficiency of the process is high and the manufacturing cost can be reduced.

An object of the present invention is to provide a method for manufacturing a film for a household appliance in which a three-dimensional pattern of various heights can be stably formed.

An object of the present invention is to provide a method for manufacturing a film for a household appliance in which a pattern with high hardness can be stably formed.

A method of manufacturing a film for a home appliance according to an embodiment of the present invention includes: a resin melting step in which a resin as a material of a film is melted in an extruder; A resin extrusion step in which molten resin is extruded through a nozzle; And a pattern forming and cooling step in which the extruded resin in a liquid state is pressed and cooled while passing through a plurality of cooling rollers and a three-dimensional pattern is formed on the resin, wherein at least one of the plurality of cooling rollers has a concavo- In the pattern forming and cooling step, the resin in the liquid state is pressed by the cooling rollers on which the pattern forming section is formed, and the pattern is formed and cooled.

The plurality of cooling rollers are formed with flow passages through which cooling water flows, and the plurality of cooling rollers are cooled by the cooling water to cool the resin to be contacted.

The plurality of cooling rollers may include a pattern roller on which the pattern forming portion is formed on an outer circumferential surface thereof; And a pressure roller spaced apart from the pattern roller. In the pattern forming and cooling step, the extruded resin is injected between the pressure roller and the pattern roller and pressed.

The outer peripheral surface of the pressure roller is uniformly formed, and the resin inserted between the pressure roller and the pattern roller is pressed on one side by the pressure roller to improve smoothness.

The pattern roller is a roll metal mold.

The pressure roller is a metal roll mold.

The plurality of cooling rollers further include a smoothing roller having an outer circumferential surface formed uniformly, and the resin passed between the pressure roller and the pattern roller is pressurized and further cooled by the smoothing roller .

The plurality of smoothing rollers are spaced apart from each other, and a resin passed between the pressure roller and the pattern roller is inserted between the plurality of smoothing rollers.

In the resin melting step, the base resin and the top resin are melted in different extruders, respectively. In the resin extrusion step, the base resin and the top resin are melted in different extruders, After the molten base resin and the top resin are formed into a multi-layer structure in the distributor, the multi-layered resin is extruded through the nozzle.

In the pattern forming and cooling step, the top resin is pressed by a cooling roller formed with the pattern forming section, and the pattern is formed on the top resin.

The base resin is an ABS resin.

The top resin is a PMMA resin.

According to the method for manufacturing a film for a home appliance according to the embodiment of the present invention, the following effects can be expected.

First, a liquid resin extruded by a cooling roller having a concavo-convex pattern forming portion on its outer circumferential surface is pressed, a three-dimensional pattern is formed on the resin, and the resin is cooled to produce a film having a three-dimensional pattern. Therefore, the process is simplified, the productivity of the film is improved, and the manufacturing cost is greatly reduced since a separate device for forming the pattern is not required.

Second, since the pattern is pressed onto the resin in the liquid state, a three-dimensional pattern of various heights can be stably formed, and a three-dimensional pattern can be effectively formed even in a resin having high hardness properties. Therefore, it is possible to effectively produce a film having patterns of various heights or patterns having high hardness.

Third, since the pattern roller is a roll metal mold, the pattern rollers of the present invention can be easily applied to a roll mold for producing a general film. Thus, it becomes possible to produce a patterned film at a low cost.

Fourth, even when a process of extruding a resin having a multi-layer structure is applied to produce a film having complex physical properties, a three-dimensional pattern can be stably formed on a desired surface by using a cooling roller having a pattern forming portion. Accordingly, a film having a complex physical property and a three-dimensional pattern can be produced with low cost and high productivity.

1 is a front view of a refrigerator according to an embodiment of the present invention.
2 is a sectional view showing a cross section of a panel to which the pattern film of the first embodiment of the present invention is attached.
3 is a sectional view showing a cross section of a panel to which the pattern film of the second embodiment of the present invention is attached.
4 is a flowchart schematically showing a method of manufacturing a patterned film according to an embodiment of the present invention.
5 is a flowchart showing a method of manufacturing a pattern film according to the first embodiment of the present invention.
6 is a schematic view schematically showing a molding process of the pattern film of the first embodiment of the present invention.
7 is a flowchart showing a method for manufacturing a pattern film according to a second embodiment of the present invention.
Fig. 8 is a schematic view schematically showing a forming process of a pattern film according to a second embodiment of the present invention.

Exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the embodiment shown in the drawings, and that other embodiments falling within the spirit and scope of the present invention may be easily devised by adding, .

1 is a front view of a refrigerator according to an embodiment of the present invention.

The refrigerator 1 according to the embodiment of the present invention can be shaped by a cabinet 10 forming a storage space and a door 20 mounted on the cabinet 10 to open and close a storage space.

The storage space of the cabinet 10 may include a refrigerating compartment for refrigerating food and a freezing compartment for freezing food. The refrigerator compartment and the freezer compartment may be divided into upper and lower parts or may be formed by being divided into left and right parts. The refrigerating chamber and the freezing chamber may be divided into a plurality of chambers by a barrier.

Inside the refrigerating and freezing compartments, various receiving members such as shelves, drawers or baskets may be provided. The storage member may be taken out and loaded in a state where the door 20 is opened as necessary, and the food can be stored and stored by the drawn-out mouth.

The door 20 is configured to open or close the storage space by a sliding or rotating method. In a closed state, the front surface of the refrigerator 1 can be formed.

The door 20 may include a refrigerating chamber door 21 for opening and closing the refrigerating chamber and a freezing chamber door 22 for opening and closing the freezing chamber.

The refrigerator compartment door (21) may be provided to open and close the opened front face of the refrigerator compartment by pivoting. The freezer compartment door 22 may be provided to open and close the opened front face of the freezer compartment.

A pattern film 100 having a pattern may be attached to the surfaces of the door 20 and the cabinet 10. Accordingly, the refrigerator 1 can realize various textures according to the pattern of the patterned film 100, and can form a beautiful appearance.

In detail, the door 20 and the cabinet 10 can be formed by a panel made of a metal material or a plastic material (FIGS. 2 and 25). The pattern film 100 may be attached to the upper surface of the panel 25. At this time, the pattern film 100 may be attached to part or all of the door 20. The pattern film 100 may be attached to part or all of the cabinet 10.

Hereinafter, the pattern film 100 is attached to the panel 25 forming the outer shape of the door 20 of the refrigerator 1 as an example. Of course, the attachment position of the pattern film 100 is not limited to the embodiment of the present invention, and may be attached to the panel 25 forming the outer shape of the cabinet 10. [ It is noted that the pattern film 100 is not limited to the refrigerator 1 but can be applied to various home appliances.

Meanwhile, the patterned film 100 may be formed of a resin material or a synthetic resin material. The pattern film 100 may be formed of one resin material or may be formed of a plurality of resin materials having different physical properties.

Hereinafter, the first embodiment of the pattern film 100 formed of one resin material will be described in detail.

2 is a sectional view showing a cross section of a panel to which the pattern film of the first embodiment of the present invention is attached.

2, the panel 25 forming the outer shape of the refrigerator 1 may have a top surface exposed to the outside. A pattern film 100 on which a pattern 110 is formed may be attached to the upper surface of the panel 25. The pattern film 100 may be attached to the panel 25 by an adhesive 26.

The patterned film (100) ABS resin or ASA resin or PET resin or PCT resin. Further, it may be formed of a thermosetting resin such as PMMA resin or PC resin.

The patterned film 100 may be manufactured by a method of extruding resin.

A pattern 110 having a predetermined shape may be formed on the pattern film 100. At this time, the pattern 110 may be three-dimensionally formed, or a combination of a recessed region and a protruded region. That is, concavo-convex patterns 110 having embossed and engraved patterns may be regularly arranged on the upper surface of the patterned film 100.

The pattern 110 of the patterned film 100 may be formed by a stamping method on the extruded resin.

Meanwhile, the patterned film 100 may be formed of a plurality of resin materials having different physical properties.

Hereinafter, a second embodiment of the pattern film 100 formed of a plurality of resin materials will be described in detail.

3 is a sectional view showing a cross section of a panel to which the pattern film of the second embodiment of the present invention is attached.

The patterned film (100) ABS resin or ASA resin, PET resin or PCT resin, or may be formed of a thermosetting resin such as PMMA resin or PC resin. At this time, the patterned film 100 may be formed by stacking resins having different physical properties.

The patterned film 100 may be manufactured by simultaneously extruding a plurality of resins having different physical properties.

In detail, the patterned film 100 may include a base layer 130 having different physical properties and a surface layer 120.

Referring to FIG. 3, the base layer 130 may be attached to the upper surface of the panel 25 with an adhesive 26. The surface layer 120 may be formed on the upper surface of the base layer 130.

In this case, the surface layer 120 may not be separately formed on the upper surface of the base layer 130, but may be integrally formed with the base layer 130. For this purpose, the base layer 130 and the surface layer 120 may be formed by bonding resins having different physical properties into a multi-layer structure in a liquid state.

The pattern 110 may be formed on the upper surface of the surface layer 120. At this time, the pattern 110 may be three-dimensionally formed, or a combination of a recessed region and a protruded region. That is, the upper surface of the surface layer 120 may have irregular patterns 110 having embossed and engraved patterns regularly arranged.

The pattern 110 may be formed by stamping the extruded resin.

Meanwhile, the base layer 130 and the surface layer 120 are formed of resin having different physical properties, and the pattern film 100 may have complex physical properties.

For example, the base layer 130 may be formed of a resin material having high moldability and thermal stability, for example, an ABS resin. In addition, the surface layer 120 may be formed of a resin material having high hardness, for example, PMMA resin.

In this case, the compatibility of the resin of the base layer 130 with the resin of the surface layer 120 is compatible and can be stably bonded in a liquid state.

In addition, the moldability of the resin of the base layer 130 is high, so that the productivity of the patterned film 100 can be improved. Since the resin of the base layer 130 has a high thermal stability, even if the adhesive is applied to the panel 25 by using the adhesive 26, it is prevented from being deformed and stably attached to the household appliance have.

In addition, since the resin of the surface layer 120 has excellent hardness, damage to the pattern 110 can be effectively prevented in a solidified state. Therefore, the patterned film 100 of high quality can be provided.

Hereinafter, the method of manufacturing the patterned film 100 will be described in detail.

4 is a flowchart schematically showing a method of manufacturing a patterned film according to an embodiment of the present invention.

The method of manufacturing the patterned film 100 according to an embodiment of the present invention may include a resin melting step S100, a resin extrusion step S200, a pattern forming and cooling step S300.

Specifically, in the resin melting step, the resin in a solid state, which becomes the material of the pattern film 100, may be melted and liquidated in the extruder.

In the resin extrusion step, the molten resin may be extruded through the nozzle.

In the pattern forming and cooling step, the pattern 110 may be formed by a stamping method on the extruded resin, and the resin may be cooled and solidified.

In the pattern forming and cooling step, the extruded resin in a liquid state is injected into a plurality of cooling rollers, and the pattern 110 is molded by the plurality of cooling rollers, cooled, and solidified. Then, it is pressed while passing through the plurality of cooling rollers to be formed into a required thickness, and the smoothness can be improved.

6 and 425) for forming the pattern 110 may be formed on the outer circumferential surface of at least one of the plurality of cooling rollers. The resin in the extruded liquid state can be pressed by the cooling roller having the pattern forming part 425 to form the pattern 110.

The outer circumferential surfaces of the rollers other than the cooling rollers having the pattern forming portion 425 among the plurality of cooling rollers may be uniformly formed. The resin may be pressed by a cooling roller having an outer circumferential surface formed uniformly to improve smoothness.

The plurality of cooling rollers may include a flow path through which cooling water flows, and may be cooled by the cooling water to cool the resin.

Meanwhile, the method of producing the pattern film may differ in the resin melting step and the resin extrusion step, depending on whether the pattern film is the pattern film of the first embodiment or the pattern film of the second embodiment.

Hereinafter, with reference to the drawings, the manufacturing method of the pattern film of the first embodiment and the manufacturing method of the pattern film of the second embodiment will be described in more detail.

FIG. 5 is a flowchart showing a method of manufacturing a pattern film according to a first embodiment of the present invention, and FIG. 6 is a schematic view schematically showing a forming process of a pattern film according to the first embodiment of the present invention.

Referring to FIGS. 5 and 6, the resin that becomes the material of the pattern film 100 may be melted in the extruder 200. The resin in the molten liquid state can be transferred to the nozzle 300 provided at the outlet side of the extruder 200.

In detail, a solid state resin can be supplied to the extruder 200. The extruder 200 can heat and melt the resin in the solid state. At this time, the extruder 200 may heat the resin to a predetermined temperature so that the resin is in a liquid state of a predetermined viscosity.

The extruder 200 pushes the molten resin from the inside of the extruder 200 to the outlet of the extruder 200 and transfers the resin to the nozzle 300 provided at the outlet of the extruder 200. [

The nozzle 300 may adjust the molten resin to be extruded at a predetermined temperature and amount. Accordingly, the resin in the liquid state can be extruded in a predetermined amount through the nozzle 300. [S200]

On the other hand, the extruded resin in the liquid state is cooled and solidified by the cooling roller 400, and smoothness can be improved. The pattern 110 may be formed by the cooling roller 400.

In detail, the cooling roller 400 may be provided in a plurality of ways. The plurality of cooling rollers 400 may be spaced apart from each other by a predetermined distance to form the pattern film 100 to have an intended thickness.

The extruded liquid resin is supplied to the plurality of cooling rollers 400 and pressed by the plurality of cooling rollers 400 to be processed into a pattern film 100 having an intended thickness.

On the other hand, a cooling passage through which cooling water flows can be formed inside the plurality of cooling rollers 400. Accordingly, the plurality of cooling rollers 400 are cooled by cooling water, and the resin in the liquid state passes through the plurality of cooling rollers 400 and is cooled to become a solidified pattern film 100 .

At least one of the plurality of cooling rollers 400 may be formed with a pattern forming portion 425 for forming the pattern 110 on the outer circumferential surface.

In detail, the cooling roller 400 may include a pattern roller 420.

The pattern roller 420 may have a pattern forming portion 425 formed on an outer circumferential surface thereof to form the pattern 110. The pattern forming unit 425 may be formed by combining a protruding region and a recessed region to form the three-dimensionally patterned pattern 110. That is, the pattern forming unit 425 may be formed as a concavo-convex shape having an engraved and an embossed shape on the outer peripheral surface of the pattern roller 420.

An area recessed from the protruding area of the pattern forming part 425 may be formed along the outer circumferential surface of the pattern roller 420 and may be formed on the entire outer circumferential surface.

Meanwhile, the cooling roller 400 may include a pressure roller 410. The pressing roller 410 may be spaced apart from the pattern roller 420 by a predetermined distance to press the resin supplied to the space between the pattern roller 420 and the pattern roller 420.

The liquid resin extruded from the nozzle 300 may be supplied between the pressure roller 410 and the pattern roller 420. The pattern 110 may be formed by being pressed between the pressing roller 410 and the pattern roller 420 and stamped by the pattern forming section 425 of the pattern roller 420. Further, the smoothness can be improved by the pressure roller 410.

That is, the recessed area of the pattern 110 is formed by the protruded area of the pattern forming part 425, and the protruded area of the pattern 110 by the recessed area of the pattern forming part 425 Can be formed.

At this time, the pressure roller 410 and the pattern roller 420 are cooled by the cooling water to form the pattern 110, and at the same time, the liquid resin can be cooled. Accordingly, the extruded liquid resin can improve the smoothness of the surface opposite to the surface on which the pattern 110 is formed at the same time as the pattern 110 is formed, and can be cooled and solidified at the same time.

That is, the resin supplied between the pressing roller 410 and the pattern roller 420 is cooled on one side by the pressing roller, and the smoothness can be improved. The other surface of the pattern roller 420 may be cooled by the pattern roller 420, and the pattern 110 may be formed.

The resin on which the pattern 110 is formed can be transferred in contact with an area of more than half the outer circumferential surface of the pattern roller 420. That is, the pattern 110 may be transferred in contact with a region as wide as possible around the circumference of the pattern roller 420, and the pattern 110 may be transferred while being continuously cooled.

The concavo-convex pattern forming portion 425 may be further formed on the outer circumferential surface of the pressure roller 410. That is, patterns may be formed on both sides of the resin passing between the pressing roller 410 and the pattern roller 420. [S310]

Meanwhile, the cooling roller 400 may further include a smoothing roller 430. The smoothing roller 430 may be positioned in a direction in which the resin is conveyed by the pattern roller 420.

The smoothing roller 430 may provide a function of increasing the smoothness of the resin having the pattern 110 and cooling it.

The smoothing roller 430 may be disposed at a position spaced apart from the pattern roller 420 by a predetermined distance.

The resin on which the pattern 110 is formed can be supplied and pressed between the pattern roller 420 and the smoothing roller 430. Further, it is further cooled by the smoothing roller 430 and the smoothness can be improved.

Meanwhile, the smoothing rollers 430 may be arranged in a sequential manner and spaced apart from each other. The resin passed between the pattern rollers 420 and the pattern rollers 420 and the smoothing rollers 430 adjacent to the pattern rollers 420 is further cooled stably while passing between the plurality of smoothing rollers 430, Can be improved. [S320]

Meanwhile, the cooling roller 400 may be a soft roller formed of an elastically deformable material. Alternatively, the cooling roller 400 may be a hard roller formed of a metal material. That is, it may be a roll metal mold.

For example, the pattern roller 420 may be applied as a hard roller so that the pattern 110 is uniformly and deeply formed. The pressing roller 410 may be also used as a hard roller so that the pattern 110 can be formed more deeply and uniformly and the pattern film 100 formed with the pattern 110 can be stably .

The smoothing roller 430 may also be a hard roller or a soft roller. When the smoothing roller 430 is used as a cutter roller, the pattern 110 is prevented from being deformed by pressure and the smoothness of the resin can be stably improved.

Of course, it is also possible that the pattern roller 420, the pressure roller 410 and the smoothing roller 430 are both applied as soft rollers or hard rollers.

According to such a manufacturing method, the resin in the liquid state can be formed into the pattern film 100 by cooling the pattern 110 with the pattern roller 420. Therefore, the manufacturing process of the patterned film 100 in which the three-dimensionally patterned pattern 110 is formed can be simplified and manufactured at a low cost.

Since the pattern 110 is formed on the resin in the liquid state, it is possible to effectively form a pattern with a clear and varying height even in a resin having a high hardness.

Hereinafter, a method of manufacturing the pattern film 200 of the second embodiment formed of a plurality of resin materials having different physical properties will be described in detail.

FIG. 7 is a flowchart showing a manufacturing method of a pattern film according to a second embodiment of the present invention, and FIG. 8 is a schematic view schematically showing a molding process of a pattern film according to a second embodiment of the present invention.

Referring to FIGS. 7 and 8, the base resin, which is the base material of the base layer 130, may be melted in the first extruder 210. The molten base resin may be transferred to the distributor 350 provided at the outlet side of the first extruder 210.

In detail, a solid base resin may be supplied to the first extruder 210. The first extruder 210 can heat the base resin in a solid state to melt the base resin. At this time, the first extruder 210 may heat the base resin to a predetermined temperature so that the base resin is in a liquid state having a predetermined viscosity.

The first extruder 210 pushes the molten base resin to the outlet side and can transfer it to the distributor 350 provided at the outlet side.

On the other hand, the top resin, which is the material of the surface layer 120, can be melted in the second extruder 220. The molten top resin may be transferred to the distributor 350 provided at the outlet side of the second extruder 220.

In detail, a solid state top resin can be fed to the second extruder 220. The second extruder 220 may be heated by applying heat to the solid top resin. At this time, the second extruder 220 may heat the top resin to a predetermined temperature so that the top resin becomes a liquid state having a predetermined viscosity.

The molten top resin may be pushed out of the second extruder 220 to the outlet side and may be transferred to the distributor 350. [S120]

The base resin and the top resin in the liquid state transferred to the distributor 350 may be formed of a resin having a multilayer structure in the inside of the distributor 350. That is, the distributor 350 may divide the base resin and the top resin into a predetermined amount to form a laminated resin.

At this time, the base resin and the top resin in a liquid state can form a stable multi-layer structure due to differences in physical properties or differences in viscosity.

 The resin of the multi-layer structure can be transferred to the nozzle 360 provided at the outlet side of the distributor 350. The distributor 350 and the nozzle 360 may be a T-die device for forming a multi-layered resin. [S210]

The nozzle 360 can adjust the resin in a liquid state to be extruded at a predetermined temperature and amount. Thus, the resin of the multi-layer structure can be extruded through the nozzle 360 in a predetermined amount. [S220]

On the other hand, the extruded multi-layered resin in the liquid state can be cooled and solidified by the cooling roller 400, and the smoothness can be improved. The pattern 110 may be formed by processing the cooling roller 400.

In detail, the cooling roller 400 may be provided in a plurality of ways. The plurality of cooling rollers 400 may be spaced apart from each other at a predetermined interval to form the pattern film 100 to have an intended thickness.

The extruded liquid multi-layered resin is fed into the plurality of cooling rollers 400 and pressed by the plurality of cooling rollers 400 to be processed into a pattern film 100 of an intended thickness have.

On the other hand, a cooling passage through which cooling water flows can be formed inside the plurality of cooling rollers 400. Accordingly, the plurality of cooling rollers 400 are cooled by cooling water, and the resin in the liquid state multi-layer structure is cooled by the cooling rollers 400, Lt; / RTI >

At least one of the plurality of cooling rollers 400 may be formed with a pattern forming portion 425 for forming the pattern 110 on the outer circumferential surface.

In detail, the cooling roller 400 may include a pattern roller 420.

The pattern roller 420 may have a pattern forming portion 425 formed on an outer circumferential surface thereof to form the pattern 110. The pattern forming unit 425 may be formed by combining a protruding region and a recessed region to form the three-dimensionally patterned pattern 110. That is, the pattern forming unit 425 may be formed as a concavo-convex shape having an engraved and an embossed shape on the outer peripheral surface of the pattern roller 420.

An area recessed from the protruding area of the pattern forming part 425 may be formed along the outer circumferential surface of the pattern roller 420 and may be formed on the entire outer circumferential surface.

Meanwhile, the cooling roller 400 may include a pressure roller 410. The pressing roller 410 may be spaced apart from the pattern roller 420 by a predetermined distance to press the resin supplied to the space between the pattern roller 420 and the pattern roller 420.

A liquid multi-layered resin extruded from the nozzle 360 may be supplied between the pressure roller 410 and the pattern roller 420. The pattern 110 may be formed by being pressed between the pressing roller 410 and the pattern roller 420 and being subjected to a tapping process by the pattern forming unit 425 of the pattern roller 420. Further, the smoothness can be improved by the pressure roller 410.

When the resin in the liquid state is supplied, the surface of the base resin may contact the pressing roller 410 and the surface of the top resin may contact the pattern roller 420. That is, the pressing roller 410 presses the base resin to improve smoothness, and the pattern roller 420 can mold the pattern 110 by stamping the top resin.

The pressure roller 410 and the pattern roller 420 may be cooled by cooling water to cool the base resin and the top resin, respectively. Therefore, the base resin is cooled while the smoothness is improved, and the top resin is cooled while the pattern 110 is formed, so that the liquid multi-layered resin can be solidified.

The top resin on which the pattern 110 is formed may be transferred in contact with at least half the area of the outer circumferential surface of the pattern roller 420. That is, the pattern 110 is transferred in contact with a region as wide as possible around the outer circumference of the pattern roller 420, and the pattern 110 can be transferred while being continuously cooled.

Meanwhile, the cooling roller 400 may further include a smoothing roller 430. The smoothing roller 430 may be positioned in a direction in which the resin is conveyed by the pattern roller 420.

The smoothing roller 430 may provide a function of enhancing the smoothness of the resin having the multi-layer structure in which the pattern 110 is formed and cooling it.

The smoothing roller 430 may be disposed at a position spaced apart from the pattern roller 420 by a predetermined distance.

The resin having the multi-layer structure in which the pattern 110 is formed may be supplied and pressed between the pattern roller 420 and the smoothing roller 430. Further, the smoothing roller 430 can be further cooled and the smoothness can be improved.

Meanwhile, the smoothing rollers 430 may be arranged in a sequential manner and spaced apart from each other. The resin of the multi-layer structure passing between the pattern rollers 420 and the pattern rollers 420 and the smoothing rollers 430 adjacent to the pattern rollers 420 passes through between the plurality of smoothing rollers 430, And the smoothness can be further improved. [S320]

Meanwhile, the cooling roller 400 may be a soft roller formed of an elastically deformable material. Alternatively, the cooling roller 400 may be a hard roller formed of a metal material. That is, it may be a roll metal mold.

For example, the pattern roller 420 may be applied as a hard roller so that the pattern 110 is uniformly and deeply formed. The pressing roller 410 is also used as a hard roller so that the pattern 110 can be formed more deeply and uniformly and the resin having a multi-layer structure in which the pattern 110 is formed can be formed stably can do.

The smoothing roller 430 may be a hard roller or a soft roller. When the smoothing roller 430 is applied as a cutter roller, the pattern 110 is prevented from being deformed by pressure and the smoothness of the resin can be stably improved.

Of course, it is also possible that the pattern roller 420, the pressure roller 410 and the smoothing roller 430 are both applied as soft rollers or hard rollers.

According to such a manufacturing method, since the pattern film 100 is formed into a resin having a multi-layer structure having different physical properties, a pattern film having various properties can be produced.

For example, the hardness of the surface layer 120 on which the pattern 110 is formed can be made excellent by using a top resin having excellent hardness. Accordingly, it is possible to prevent the surface layer 120 formed with the pattern 110 from being damaged during the manufacturing process, and to provide the high quality pattern film 100.

The base layer 130 can be formed using a base resin having excellent moldability and thermal stability. Accordingly, the patterned film 100 can be easily manufactured with excellent moldability. And, when heated for attachment to a household appliance by excellent thermal stability, deformation can be prevented and stably attached.

In addition, the manufacturing process of the patterned film 100 having the three-dimensional pattern 110 and the complex physical property can be remarkably simplified, and the manufacturing cost can be greatly reduced.

In detail, in order to produce a pattern film having generally complex physical properties, a manufacturing method in which a three-dimensional patterned top resin and a base resin having different physical properties are produced and attached can be used. In particular, in order to attach a top resin having a three-dimensional pattern to a base resin, a process using a soft roller is required in consideration of bending of the pattern. In contrast, the manufacturing method according to the present invention omits the step of adhering the top resin and the base resin, thereby simplifying the manufacturing process and greatly reducing the manufacturing cost.

Claims (12)

A resin melting step in which a resin as a material of the film is melted in an extruder;
A resin extrusion step in which molten resin is extruded through a nozzle;
And a pattern forming and cooling step in which a three-dimensional pattern is formed on the resin while the extruded liquid resin is pressed and cooled while passing between the plurality of cooling rollers,
Wherein at least one of the plurality of cooling rollers has a concavo-convex pattern forming portion formed on an outer circumferential surface thereof,
Wherein in the pattern forming and cooling step, the liquid resin is pressed by the cooling rollers on which the pattern forming portion is formed, and the pattern is molded and cooled. The method according to claim 1,
Wherein a plurality of cooling rollers are formed with a flow passage through which cooling water flows,
Wherein the plurality of cooling rollers are cooled by cooling water to cool the resin to be contacted. The method according to claim 1,
The plurality of cooling rollers include:
A pattern roller on which the pattern forming portion is formed on an outer circumferential surface;
And a pressure roller spaced apart from the pattern roller,
Wherein in the pattern forming and cooling step, the extruded resin is injected between the pressure roller and the pattern roller and pressed. The method of claim 3,
The outer peripheral surface of the pressure roller is uniformly formed,
Wherein the resin applied between the pressure roller and the pattern roller is pressed on one side by the pressure roller to improve smoothness. The method of claim 3,
Wherein the pattern roller is a roll mold of a metal material. The method of claim 3,
Wherein the pressure roller is a metal roll mold. The method of claim 3,
Wherein the plurality of cooling rollers further include a smoothing roller having an outer circumferential surface formed uniformly,
Wherein the resin passed between the pressure roller and the pattern roller is pressed and further cooled by the smoothing roller. 8. The method of claim 7,
The smoothing roller is provided with a plurality of spaced-
Wherein the resin passed between the pressure roller and the pattern roller is inserted between the plurality of smoothing rollers. The method according to claim 1,
The film has a multi-layer structure in which a base resin and a top resin having different physical properties are laminated,
In the resin melting step, the base resin and the top resin are respectively melted in different extruders,
Wherein in the resin extrusion step, the molten base resin and the top resin are formed into a multilayer structure in a distributor, and then the resin having a multi-layer structure is extruded through a nozzle. 10. The method of claim 9,
In the pattern forming and cooling step,
Wherein the top resin is pressed by a cooling roller on which the pattern forming portion is formed to form the pattern on the top resin. 11. The method of claim 10,
Wherein the base resin is an ABS resin. 12. The method of claim 11,
Wherein the top resin is a PMMA resin.

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