KR20220144581A - UV-printed acrylic kitchenware manufacturing method - Google Patents

Abstract

According to the present invention, a method for manufacturing a UV-printed acrylic kitchen bowl comprises: a UV printing step of forming a printed layer by printing a predetermined design on a rear surface of an acrylic flat plate; a flat plate arrangement step of arranging the acrylic flat plate, on which the printed layer is formed, in a lower mold; and a kitchen bowl forming step of molding the acrylic flat plate into a kitchen bowl having a bent portion using a pressurizing force transmitted when an upper mold separately disposed at an upper part of the lower mold descends toward the lower mold. The present invention can provide the method for manufacturing a UV-printed acrylic kitchen bowl, which can form a printed layer by UV-printing a predetermined design on a rear surface of an acrylic flat plate and can mold the acrylic flat plate into a kitchen bowl, and thus, various designs can be printed by UV-printing and printing can be carried out with various colors using CMYK colors.

Description

UV-printed acrylic kitchenware manufacturing method

The present invention relates to a method for manufacturing UV printed acrylic kitchenware.

In general, kitchen bowls including trays with patterned patterns are printed on melamine synthetic resin sheets and bent to form bowls, or printed fabric sheets (fabric) are placed on glass fiber reinforced plastic (FRP) sheets. It was made by placing it and attaching it with adhesive resin, and forming it by bending it.

A bowl made of such a printed fabric sheet can express texture, but due to the nature of the woven fabric, a smooth surface is not possible, so the printed pattern is not clear or a more detailed pattern is not expressed.

In addition, even when a pattern is expressed by various colors, the fabric sheet has excellent hygroscopicity, and the colors are mixed with each other at the boundary where different colors are mixed, resulting in undesired colors or the desired pattern being printed unclearly. there was

In addition, due to the characteristics of the sheet, it is difficult to manufacture a small amount, and it is necessary to manufacture a large amount, and due to the disadvantage of having to manufacture a large amount of cloth sheet for one design, it is difficult to produce a bowl having various designs printed therein.

Republic of Korea Patent Publication 10-1994-0025740 Republic of Korea Patent Registration 10-0318989 Republic of Korea Patent Publication 10-2012-0133158

An object of the present invention, which was devised to solve the above problems, is to form a printed layer by UV printing a preset design on the back surface of an acrylic flat plate, and then molding a kitchen bowl, thereby printing various designs by UV printing. In addition, it is to provide a method for manufacturing UV printed acrylic kitchenware that can be printed in various colors with CMYK color.

In addition, an object of the present invention is to place a crack prevention pad on the upper part of the acrylic plate, and then lower the upper mold to form a kitchen bowl. The purpose of this is to provide a method for manufacturing UV-printed acrylic kitchenware that can reduce the defect rate and increase the production rate by preventing and blocking the crack phenomenon in which the printed layer is broken through impact prevention and elastic support according to the pressing force of the product.

According to the UV-printed acrylic kitchenware manufacturing method of the present invention for achieving the above object, a UV printing step of UV-printing a preset design on the back surface of an acrylic plate to form a printing layer; a flat plate arrangement step of placing the acrylic flat plate on which the printing layer is formed on a lower mold; and a bowl forming step of forming the acrylic plate into a kitchen bowl having a bent portion with a pressing force transmitted while the upper mold provided spaced apart from the lower mold descends toward the lower mold.

In addition, the printing layer includes a design layer formed by UV printing the design on the back surface of the acrylic plate, and a background layer formed by UV printing a preset background color on the design layer.

In addition, the base layer is made of white, it is characterized in that the transparency is 45 to 55.

In addition, the UV printing step is characterized in that before forming the UV printing layer on the back surface of the acrylic plate, a pretreatment agent for attaching the UV ink liquid is applied.

In addition, between the flat plate arrangement step and the kitchen bowl forming step, a pad arrangement step of disposing a crack prevention pad on the upper part of the acrylic plate; It is characterized in that the printed layer is prevented from being broken through shock prevention and elastic support according to the pressing force of the upper mold when forming the bent part by pressing the .

The effect of the present invention as described above is, by UV printing a preset design on the back surface of the acrylic plate to form a printing layer, and then molding a kitchen bowl, thereby printing various designs by UV printing and various colors in CMYK color. It is possible to provide a method for manufacturing a UV printed acrylic kitchenware that can be printed with

In addition, the effect of the present invention is that, after placing the anti-crack pad on the upper part of the acrylic plate, the upper mold is lowered to form the kitchen bowl, and the upper mold is lowered and the acrylic plate is pressed to form a bent part when the upper mold is formed. It is possible to provide a UV-printed acrylic kitchenware manufacturing method that can prevent and block the crack phenomenon in which the printed layer is broken through impact prevention and elastic support according to the pressing force, thereby lowering the defect rate and increasing the production rate.

1 is a flowchart showing a UV-printed acrylic kitchenware manufacturing method according to a preferred embodiment of the present invention.
2 is a flowchart showing the UV printing step of the UV-printed acrylic kitchenware manufacturing method according to a preferred embodiment of the present invention.
Figure 3 is a view schematically showing the kitchen bowl forming step of the UV-printed acrylic kitchen bowl manufacturing method according to a preferred embodiment of the present invention.
4 is a photograph showing a state in which a crack has occurred in the kitchen bowl.
5 is a photograph showing a kitchen bowl manufactured according to the UV-printed acrylic kitchen bowl manufacturing method according to a preferred embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining a UV-printed acrylic kitchenware manufacturing method according to embodiments of the present invention.

1, the UV-printed acrylic kitchenware manufacturing method according to the present invention includes a UV printing step (S10), a flat plate placement step (S20), a pad placement step (S30) and a kitchen bowl forming step (S40) do.

Here, the kitchenware includes a tray, a plate, a rice bowl, and the like.

First, in the UV printing step (S10), a printed layer is formed by UV printing a preset design on the back surface of the acrylic flat plate 10 .

At this time, the acrylic plate 10 is made of an acrylic resin and is one of the types of plastic having a predetermined thickness.

Since vinyl is adhered to the flat surface of the acrylic flat plate 10, it is preferable to perform UV printing on the back surface so that the printed layer is visible on the flat surface, but the present invention is not limited thereto.

Meanwhile, referring to FIG. 2 , the UV printing step (S10) includes a preparation step (S11), a design printing step (S12), a background printing step (S13), and a curing step (S14).

In the preparation step (S11), the transparent acrylic plate 10 is cut to the size of the press mold 40 to be produced, and a pretreatment agent is applied to the back surface to be UV printed.

The pretreatment agent is applied in order to adhere the UV ink solution.

Referring to FIG. 4 , in general, the printed layer printed with UV ink is fixed without applying a pretreatment agent to the acrylic flat plate 10 . At this time, in the case of bending the acrylic flat plate 10 on which the printing layer is formed, that is, forming the curved part 31 like the kitchen bowl 30, the printing layer is bent in the press mold 40 and peeled off from the curved part 31 part. Or a crack may occur.

Therefore, after applying the pretreatment agent, by forming a printed layer through UV printing, it is possible to prevent cracks caused by the press mold 40 in the kitchen bowl forming step (S40) to be described later, and the kitchen bowl 30 is Peeling can be prevented by bending or heating.

The design printing step (S12) and the background printing step (S13) are steps of forming a print layer.

The printing layer includes a design layer 12 formed by UV printing a design on the back surface of the acrylic flat plate 10 and a background layer 11 formed by UV printing a preset background color on the upper portion of the design layer 12 .

That is, in the design printing step (S12), the design layer 12 is formed by UV printing a preset design on the back surface of the acrylic flat plate 10 .

In addition, in the background printing step (S13), the background layer 11 is formed by UV printing a predetermined background color on the upper part of the design layer 12 .

At this time, when the design layer 12 and the base layer 11 are formed, the steps may be changed back and forth.

In particular, a white UV ink liquid can be used for the background color, and it can also be formed by using 2 degrees.

The base layer 11 may have a transparency of 45 to 55, preferably 50, but is not limited thereto.

Here, when the design layer 12 is formed on the transparent acrylic flat plate 10 , the base layer 11 serves to increase the sharpness that makes the design layer 12 stand out. At this time, when the base layer 11 is formed, if it is thickly formed without transparency, cracks in the base layer 11 may occur due to pressurization of the press mold 40 .

That is, the base layer 11 is thinly formed using transparency to prevent cracks in the base layer 11 , and when the transparency is 45 to 55, the design layer 12 is the acrylic plate 10 . Blurry reflection from the back.

In addition, when the transparency of the base layer 11 is less than 45, the color development of the design layer 12 is lowered and the clarity is lowered. Since cracks occur in the base layer 11 during molding through (40), the base layer 11 preferably has a transparency of 45 to 55.

At this time, the portion corresponding to the bent portion 31 of the kitchen bowl 30 to be described later is preferably made of only the base layer 11 without the design layer 12 to have a certain thickness, but is not limited thereto.

On the other hand, the transparency of the base layer 11 is a white UV ink liquid, and when the acrylic flat plate 10 has a thickness of 1.5 to 3 mm, it may be made of 45 to 55. Since the base layer 11 is formed on the transparent acrylic flat plate 10, the thickness may be irrelevant in the case of the transparent acrylic flat plate 10, but when a colored UV ink liquid is used, the transparency may be changed.

As in the prior art, a fabric is provided to form a design, but there is a disadvantage that a large amount of fabric is required for one design and thus various designs cannot be formed. In addition to being able to selectively form the design layer 12 easily, there is an advantage in that various colors can be provided by printing through CMYK colors.

In the curing step (S14), the printed layer is cured by irradiating it with ultraviolet rays.

UV ink is a mixture of total volatile organic compounds (TVOC), toluene, and formaldehyde. The curability is controlled according to the emission spectrum of the ultraviolet ray irradiated for curing the print layer, and the wavelength range of the ultraviolet ray advantageous for curing the print layer may be 350 to 420 mm. This is because UV light in the 350-420 mm long region is advantageous for transmittance, and the pigment used in the UV ink solution exhibits the maximum transmittance at a wavelength of 360 mm.

In addition, the irradiation time of ultraviolet rays varies depending on the number of ultraviolet lamps and the distance from the lamps, but it can be made to have an ultraviolet irradiation time of 0.5 to 5 seconds to suit the conveyor speed of the UV printing machine and to enable external curing of the UV ink liquid. .

If the irradiation time of ultraviolet rays is less than 0.5 seconds, there is a fear that the UV ink may not be cured, so there is a risk of color bleeding in the subsequent process.

The ultraviolet lamp may use a high-pressure mercury lamp or a metal halide lamp.

In the flat plate arrangement step (S20), the acrylic flat plate 10 on which the printing layer is formed is placed on the lower mold 41 .

At this time, the printing layer is disposed to face the lower mold 41 .

In addition, referring to FIG. 3 , the lower mold 41 is formed in a concave shape with a flat inside, and is formed to be curved at the rim, so that the concave shape of the kitchen bowl 30 and the bent part 31 can be formed on the outer side. have. At this time, the upper mold 42 may be formed in a protruding shape to be inserted into the lower mold 41 with a concave rear surface and to form the bent portion 31 . The lower mold 41 and the upper mold 42 are formed to correspond to each other as the press mold 40 .

In the pad arrangement step (S30), the crack prevention pad 20 is placed on the top of the acrylic plate 10 .

The anti-crack pad 20, when the upper mold 42, which will be described later, descends and presses the acrylic plate 10 disposed on the lower mold 41 to form the bent portion 31, the pressing force of the upper mold 42 It is possible to prevent the printed layer of the molded kitchen bowl from breaking through impact prevention and elastic support.

That is, by preventing the upper mold 42 made of metal and the acrylic plate 10 from coming into direct contact with each other, the pressing force of the upper mold 42 is not directly transmitted, but can be made indirectly. As this indirect pressing force is constantly transmitted simultaneously with the expansion of the crack prevention pad 20, it is possible to block the occurrence of cracks in the printed layer, as shown in FIG. 5 .

In this case, the anti-crack pad 20 may have a thickness of 1 to 2 mm, but is not limited thereto.

In the jigbang molding step, the upper mold 42 provided spaced apart from the upper mold 41 descends toward the lower mold 41, and the acrylic plate 10 is applied with a pressing force to transmit the bent portion 31 to the kitchen bowl ( 30) is molded.

On the other hand, the crack prevention pad 20, the portion corresponding to the bent portion 31 is partially expanded when the upper mold 42 is pressed, or contracted when the upper mold 42 is returned to its original position. and may be made of a material having a contractile force. For example, it may be made of a rubber material, but is not limited thereto.

Here, when the anti-crack pad 20 is formed to be flat, the corner 32 portion where the different curved portions 31 of the kitchen bowl 30 meet during the pressing process is a wool phenomenon in which the anti-crack pad 20 is wrinkled. This may occur, and the pressing force may not be constantly applied to the edge 32 of the kitchen bowl 30 due to the wool phenomenon. As a result, the expansion of the acrylic flat plate 10 and the printed layer may not be uniformly made, and the printed layer may become wrinkled.

In order to prevent this phenomenon, the crack prevention pad 20 may be formed with a rear surface protruding to correspond to the lower mold 41 , and a flat surface to be formed to correspond to the upper mold 42 . Accordingly, when the upper mold 42 descends, the plane of the anti-crack pad 20 comes into contact with the upper mold 42 as if fitted, and then the acrylic plate 10 is pressed. When the acrylic plate 10 is inserted and molded into the lower mold 41 by pressing, the expansion of the crack prevention pad 20 corresponding to the bent portion 31 is minimized and no wool is generated in the corner 32. While a pressing force is constantly applied to the crack prevention pad 20 that maintains a constant shape, the shock is also uniformly absorbed as a whole. At the same time, the acrylic plate 10 is molded while the pressing force is constantly pressed to the acrylic plate 10 .

For this reason, the printed layer corresponding to the bent part 31 of the kitchen bowl 30 is constantly pressed, and cracks do not occur while expanding.

As described above, in the manufacture of the kitchen bowl 30 of the present invention, UV printing is performed so that only the base layer 11 is formed on the printed layer corresponding to the bent portion 31 of the kitchen bowl 30, but the base layer 11 is printed so that the transparency of is 45 to 55, provided between the acrylic plate 10 and the upper mold 42, but provided with a crack prevention pad 20 corresponding to the upper mold 42 and the lower mold 41 By allowing the pressing force to be constantly applied, it is possible to prevent cracks from occurring in the printed layer formed on the kitchen bowl 30 formed of an acrylic material.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims described below rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted In addition, the operation sequence of the components described in the above process does not necessarily have to be performed in a time-series order, and if the gist of the present invention is satisfied even if the execution order of each configuration and step is changed, such a process may fall within the scope of the present invention. Of course you can.

S10: UV printing step S11: preparation step
S12: design printing step S13: background printing step
S14: hardening step S20: flat plate arrangement step
S30: Pad placement step S40: Kitchen bowl forming step
10: Acrylic flat plate 11: Design layer
12: base layer 20: crack prevention pad
30: kitchen bowl 31: bent part
32: corner 40: press mold
41: lower mold 42: upper mold

Claims (5)

UV printing step of UV printing a preset design on the back surface of the acrylic plate to form a print layer;
a flat plate arrangement step of placing the acrylic flat plate on which the printing layer is formed on a lower mold;
A kitchen bowl forming step of forming the acrylic plate into a kitchen bowl having a bent portion with a pressing force transmitted while the upper mold provided spaced apart from the lower mold descends toward the lower mold; UV-printed acrylic kitchenware manufacturing comprising a Way.
The method of claim 1,
The printed layer is
A UV printed acrylic kitchenware manufacturing method comprising a design layer formed by UV printing the design on the back surface of the acrylic plate, and a base layer formed by UV printing a preset background color on the upper portion of the design layer.
3. The method of claim 2,
The base layer is made of white, the UV-printed acrylic kitchenware manufacturing method, characterized in that the transparency of 45 to 55.
The method of claim 1,
The UV printing step, UV printed acrylic kitchenware manufacturing method, characterized in that before forming the UV printing layer on the back surface of the acrylic plate, applying a pretreatment for attaching the UV ink liquid.
The method of claim 1,
Between the flat plate arrangement step and the kitchen bowl forming step, a pad arrangement step of disposing a crack prevention pad on the top of the acrylic flat plate; further comprising,
The crack prevention pad is characterized in that when the upper mold descends and the acrylic plate is pressed to form a bent portion, the printed layer is prevented from being broken through impact prevention and elastic support according to the pressing force of the upper mold. How to make UV printed acrylic kitchenware.

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