TWI727147B - A manufacturing method of a pressure container comprising in-mold label and three-dimensional shape - Google Patents

Abstract

The present invention provides a method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape, including the following steps: heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to the three-dimensional shape to be formed on the surface of the container; opening the mold; The label is attached to the inner surface of the mold and at least a part of the label attached to the inner surface of the mold covers the three-dimensional groove; the preform of the container is arranged inside the cavity of the mold; the mold is closed and a predetermined range of pressure is applied to the preform through the first path Inject air inside to expand the preform; make the label attached to the surface of the preform and the surface of the expanded preform be deformed by air pressure; inject cooling air into the expanded and deformed preform through the second path; separate the mold and The container is taken out of the mold, so that the pressure container can have a three-dimensional shape, color, and texture, which helps to improve the advertising effect of the product using the pressure container.

Description

Manufacturing method of pressure vessel including in-mold label and three-dimensional shape

The present invention relates to a pressure vessel with an in-mold label and a manufacturing method thereof, in particular to a pressure vessel in which a three-dimensional shape can be formed on the outer peripheral surface of a pressure vessel labeled in a mold by blowing a preform and a manufacturing method thereof.

A container that can withstand internal pressure in order to contain carbonated beverages and other fluids with internal pressure is called a pressure vessel.

This type of pressure vessel is manufactured by first manufacturing a normal preform (free form), and then performing a blowing operation in which air is injected to manufacture the vessel.

In addition, in order to stick the label to the pressure vessel, the preform is expanded after sticking the label inside the mold so that it naturally adheres to the surface of the container, which is called the in-mold labeling process.

However, when using the in-mold labeling process to manufacture a label-attached pressure vessel, as described in Japanese Patent Publication No. 2006-276646, since the outer peripheral surface is flat, when the product is manufactured and marketed using this pressure vessel , The shape design is inevitable a thousand times, so it is insufficient in attracting the attention of consumers.

In addition, at present, when a three-dimensional shape is to be formed on a plastic container, the three-dimensional shape is formed on the outside of the container, and the label is covered and completed by heat shrinking. However, in this case, the label part (hologram) of the three-dimensional part should be covered. , The boundary of the text part) is inconsistent with the boundary of the three-dimensional part, so it is impossible to produce a container that can present the aesthetic feeling as desired.

technical problem

The present invention solves this limitation, and aims to provide a pressure vessel with an in-mold label and a pressure vessel with an in-mold label that is capable of three-dimensionally forming at least a part of the outer surface of the pressure vessel and deforming the label above it to present a three-dimensional effect. Production method.

Technical solutions

In order to achieve the above object, the object of the present invention is to provide a method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape, including the step of heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to the one to be formed in the container The three-dimensional shape of the surface; the step of opening the mold; the step of attaching a label to the inner surface of the mold and allowing at least a part of the label attached to the inner surface of the mold to cover the three-dimensional groove; arranging the preform of the container inside the cavity of the mold Steps; closing the mold and injecting air into the preform through the first path with a predetermined range of pressure to expand the preform; making the label attached to the surface of the preform in the process of attaching the expanded preform and the label to each other, The step of deforming the surface of the expanded preform into a three-dimensional shape corresponding to the three-dimensional groove by air pressure; the step of injecting cooling air into the interior of the expanded and deformed preform into a container form through the second path; and separating the mold And the step of taking out the container with the three-dimensional shape and the corresponding deformed label attached from the mold.

The label includes: a substrate part; an adhesive layer, which is provided on the inner surface of the substrate part and melts when the temperature is above a predetermined temperature; and a printing layer, which is provided on the outer surface of the substrate part, is printed with corresponding to the three-dimensional shape The pattern, pattern, image, character or number of the part processed by the protrusion or depression, wherein the step of attaching the label to the inner surface of the mold is the step of attaching the label to the mold and making the position of the printing layer correspond to the three-dimensional groove.

The step of expanding the preform is realized by injecting air according to the first pressure range, and then further includes the step of injecting air with a second pressure range higher than the first pressure range.

The first path is realized by using an air supply port that can be raised and lowered and can be arranged at the inlet of the preform, and the second path is realized by a pipe of an air injection device that can be raised and lowered and can be inserted into the preform.

The step of heating the mold is to heat the mold so that the temperature of the mold is maintained in the temperature range of 40~80°C.

The present invention further provides another method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape, including: heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to the three-dimensional shape to be formed on the surface of the container; opening The step of mold; the step of attaching a label to the inner surface of the mold and at least a part of the label attached to the inner surface of the mold covers the three-dimensional groove; the step of arranging the preform of the container inside the cavity of the mold; closing the mold and The step of using an air injection device located outside the mold to inject air into the preform with a predetermined range of pressure to expand the preform; the label attached to the surface of the preform will interact with the expanded preform during the process of attaching the expanded preform and the label to each other. The step of deforming the surface of the preform into a three-dimensional shape corresponding to the three-dimensional groove by air pressure; the step of injecting cooling air into the inside of the container formed by the expanded preform; separating the mold and taking it out of the mold to have a three-dimensional effect Steps to shape and attach a correspondingly deformed label to the container.

The step of expanding the preform is realized by injecting air into an air supply port that can be arranged at the entrance of the preform and capable of supplying air to the inside of the preform, and the step of cooling the preform is realized by injecting air into the interior of the preform. The pipe of the device is realized by injecting cooling air into the interior of the preform.

The step of expanding the preform includes the step of injecting air with a first pressure range; after injecting the air with the first pressure range, the step of injecting air with a second pressure range higher than the first pressure range.

The present invention further provides yet another method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape, including the step of heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to the three-dimensional shape to be formed on the surface of the PET container; The step of opening the mold; the step of attaching a label to the inner surface of the mold and allowing at least a part of the label attached to the inner surface of the mold to cover the three-dimensional groove; the step of arranging the PET preform of the container inside the cavity of the mold; closing Mold and insert the tube of the air injection device located outside the mold into the PET preform and inject air into the PET preform with a predetermined range of pressure to expand the PET preform; the label attached to the surface of the PET preform is inflated In the process of attaching the PET preform to the label, the surface of the expanded PET preform is deformed by air pressure into a three-dimensional shape corresponding to the three-dimensional groove; the mold is separated and the three-dimensional shape is removed from the mold and attached Steps for PET containers with correspondingly deformed labels.

The label includes: a substrate part; an adhesive layer, which is provided on the inner surface of the substrate part and melts when the temperature is above a predetermined temperature; and a printing layer, which is provided on the outer surface of the substrate part, is printed with corresponding to the three-dimensional shape The pattern, pattern, image, character or number of the part processed by the protrusion or depression, wherein the step of attaching the label to the inner surface of the mold is the step of attaching the label to the mold and making the position of the printing layer correspond to the three-dimensional groove.

Technical effect

According to the present invention, the pressure vessel can be provided with a three-dimensional shape, color and texture, and therefore contributes to improving the advertising effect of products using such a pressure vessel.

In addition, a variety of patterns or characters, patterns, numbers, and portraits are formed in the cavity of the mold, so that a variety of three-dimensional shapes can be formed.

As far as the current three-dimensional shape is concerned, only heat shrinkage or direct attachment can be used, and the three-dimensional shape of the container is inconsistent with the printing surface (text, image, pattern, pattern, number, etc.) of the label that should cover the three-dimensional shape .

As far as the present invention is concerned, the three-dimensional shape is strongly formed by the in-mold label and the blowing method, and the corresponding part of the label is accurately attached to the three-dimensional shape part. Therefore, it has the advantage of being able to provide a pressure vessel that exhibits beauty and accuracy in configuration.

The advantages, features, and implementation methods of the present invention can be clarified by referring to the drawings and the embodiments specifically described in combination with the drawings.

However, the present invention is not limited to the embodiments disclosed below, but is implemented in different and multiple forms. This embodiment only makes the disclosure of the present invention more complete, so that those of ordinary skill in the art to which the present invention belongs can easily Provided by understanding the scope of the present invention, the present invention is defined by the scope of technical solutions.

In addition, the terms used in this specification are used to describe the embodiments, but not to limit the present invention.

Singular sentences in this manual also include plural sentences unless otherwise stated. The "comprises" and/or "comprising" used in the specification mean that it does not exclude the presence or presence of other constituent elements in addition to the aforementioned constituent elements.

If there is no other definition, all terms (including technical terms or scientific terms) used in this specification can be used with the same meanings as those of ordinary skill in the art to which the present invention belongs.

Hereinafter, in order to explain the present invention more specifically, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in FIG. 1, the pressure vessel 100 with the in-mold label 200 of the present invention is composed of an inlet portion 110 and a body portion 120 having a larger diameter than the inlet portion 110.

A label 200 is attached to the outer peripheral surface of the main body 120, and the edge of the label 200 forms a break 121 formed during in-mold labeling.

This is a gap between the part that is in contact with the label 200 during the expansion of the pressure vessel 100 and the part that is attached to the label 200 and the part that is not attached to the label 200, and the part that is not attached to the label 200 is slightly oriented toward the part that is attached to the label 200. Outwardly protruding form.

The label 200 includes a base material portion 201 and a printed layer 202 disposed on the outer surface of the base material portion 201. The printed layer 202 is located on the three-dimensional portion 122 formed on the outer peripheral surface of the pressure vessel 100 (refer to Figure 2), corresponding to the shape of the three-dimensional portion 122 The ground is protruded or recessed to create a three-dimensional effect.

An adhesive layer 203 (refer to Fig. 5) is formed on the back of the base part 201, and the adhesive layer 203 is melted with the surface of the expanded preform (the preform to be formed into a pressure vessel) with a high surface temperature in the in-mold labeling step. The label 200 is attached to the surface of the pressure vessel 100.

Observing the state of the label 200 attached to the main body 120 of the pressure vessel 100, the printed layer 202 of the label 200 is located on the three-dimensional portion 122 formed on the surface of the main body of the pressure vessel 100, so it appears that the printed layer 202 protrudes outward.

In particular, when the printed layer 202 is an eye-catching reflective layer or a holographic layer, the mapped color differs depending on the visual direction of the observer, so it can attract the observer's attention or line of sight.

The oblique line in the first figure is the part of the printing layer 202 that is processed as a holographic layer or a reflective layer. The advantage of this part is that it can more highlight the 3D three-dimensional structure.

FIG. 2 shows the state after the label 200 is removed from the main body 120 of the pressure vessel 100.

The label 200 attached to the pressure vessel 100 of the present invention has a planar two-dimensional structure instead of the original three-dimensional structure.

However, the part covering the three-dimensional part 122 of the body part 120 of the pressure vessel 100 is formed with a printing layer 202, and the part is processed with a reflective layer or a holographic layer, or a color, pattern, or pattern different from the surface color of the base part 201 is formed. , Numbers, text, portraits, etc.

The pressure generated when the three-dimensional portion 122 of the main body 120 of the pressure vessel 100 is formed by in-mold labeling transforms the original two-dimensional label 200 into a three-dimensional structure.

A three-dimensional portion 122 is formed on the surface of the main body 120 of the pressure vessel 100, and the three-dimensional portion 122 is processed to be more convex or concave than other surfaces of the main body 122, so that the boundary with the other surfaces is clear.

In addition, the boundary of the three-dimensional portion 122 and the boundary of the printed layer 202 of the label 200 are arranged at the same or similar positions, so that the outline of the three-dimensional portion 122 can be faithfully presented on the printed layer 202 of the label 200.

In addition, the visible line of the outline of the location where the label 200 is to be attached indicates the broken portion 121, which forms the boundary between the labeled portion and the non-labeled portion during the in-mold labeling process.

As shown in Figure 3, when viewing the pressure vessel 100 with a three-dimensional structure formed and labeled from the side, the three-dimensional portion 122 and the printed layer 202 covering the three-dimensional portion 122 appear to protrude outward, which significantly induces the absence of the three-dimensional portion 122 The visual contour difference between the surfaces.

As shown in FIG. 4, the three-dimensional part 122 formed in the pressure vessel 100 protrudes outward than other parts, and protrudes more than other parts.

In addition, the protruding degree of each part on the three-dimensional portion 122 is also different, and the part forms characters, numbers, images, patterns, patterns, patterns, etc., which can attract people's attention.

The label 200 is attached to the three-dimensional part 122, and the printed layer 202 is located on the surface of the label 200 and protrudes through the three-dimensional part 122. Therefore, its advantage is that in addition to the shape factor, the color, reflectance, and holography can also be used. The picture is more attractive to people's attention.

Here, it is preferable that the interface of the printed layer 202 corresponds to the interface of the three-dimensional portion 122.

The reason why the three-dimensional portion 122 can be formed on the pressure vessel 100 is because the three-dimensional groove 322 (Figure 9) that exactly matches the three-dimensional portion 122 is formed inside the mold used for the blowing operation, and the printing layer 202 of the label 200 should be arranged accurately Covering such a three-dimensional groove 322, which will be described later.

In this state, when the preform 700 (FIG. 9) expands, the expanded portion of the three-dimensional groove 322 pushes the label 200 toward the inner surface of the three-dimensional groove 322 to form the three-dimensional portion 122 and make the label appear three-dimensional.

Figure 5 shows the state of separating the pressure vessel 100 and the label 200.

When the label 200 is deformed while being attached to the pressure vessel 100 and then removed, the portion corresponding to the printed layer 202 of the label 200 is deformed into a shape corresponding to the three-dimensional portion 122 of the pressure vessel 100 due to thermal and physical deformation. The three-dimensional shape.

However, as described above, the label 200 originally has a planar shape with a two-dimensional structure, a flat printed layer 202 is formed on the outer surface of the base portion 201, and an adhesive layer 203 is formed on the inner surface of the base portion 201.

Figures 6 to 8 show images of the pressure vessel 100 in a three-dimensional form (for example, a dragon shape).

If Figures 1 to 5 show that characters can be presented in three-dimensional shapes, then Figures 6 to 8 show that in addition to characters, images or patterns that can present complex shapes are also shown.

Here, the first label 1200 is printed with a plane-shaped dragon pattern, and the first label 1200 includes a base 1201 and a printed layer 1202 having a dragon-shaped image.

However, if a dragon-shaped three-dimensional groove is formed on the inner surface of the mold cavity used for the air blowing step, the dragon-shaped image is accurately attached to the three-dimensional groove and air is injected to expand the preform. The surface of the preform in which the groove moves expands to form a three-dimensional part in the form of a three-dimensional groove on the surface of the container.

In addition, through the above process, the printed layer 1202 with a dragon-shaped portrait can also be accurately transformed into a three-dimensional shape with a three-dimensional effect.

Figure 9(a) to Figure 9(d) show the manufacturing steps of the pressure vessel with in-mold label of the present invention.

As shown in FIG. 9(a), the molds 300, 310, and 320 for manufacturing the shape of the pressure vessel 100 are separated from each other.

It is necessary to use warm water or a heater to heat the molds 300, 310, and 320. The arrow T indicated by the dotted line in Figs. 9 to 10 shows the heating state.

The reason why the molds 300, 310, and 320 need to be heated will be explained in detail later, but the purpose is to make the label easy to stick to the container and maintain the sticking state firmly and stably.

A three-dimensional groove 322 for forming a three-dimensional portion 122 (refer to FIG. 2) is formed on the inner surface of the cavity of any one of the molds 320.

The molds 300, 310, and 320 are formed with suction flow paths 311, 321 for vacuum suction of the label 200 when the label 200 is attached.

When the molds 300, 310, and 320 are opened, the vertical arm 401 of the label supply device 400 above the molds 300, 310, and 320 is lowered to move the label 200 into the molds 300, 310, and 320.

In addition, the vertical arm 401 of the label supply device 400 is provided with a tube 403 that can telescopically move in the horizontal direction (or move in a sleeve multi-stage manner), and has a supporting element 402 arranged between the vertical arm 401 and the tube 403.

The tube 403 also has a vacuum adsorption force, so that the label 200 is in a state of being adsorbed on the tube 403.

In this state, when the tube 403 moves on the inner surface of each mold, the label 200 attached to the tube 403 is attached to the inside of the mold.

After the label 200 is attached to the inner surface of the molds 300, 310, and 320 by vacuum suction pressure, the vacuum pressure on the inner surface of the tube 403 is released.

In this state, when the tube 403 returns to its original shape, the label 200 remains attached to the inner surface of the cavity.

Here, it is preferable that the position of the interface of the three-dimensional groove 322 and the interface of the printed layer 202 (refer to FIG. 2) of the label 200 coincide with each other.

Since the label 200 is a two-dimensional plane, it does not enter the inner surface of the three-dimensional groove 322, but only forms a state covering the three-dimensional groove 322.

In this state, the preform 700 enters between the opened molds 300, 310, and 320 in a state of being placed upside down on the rib 600.

Here, the preform 700 may be a preform such as PE, PET, etc., but is preferably a PET preform.

In addition, a bottom forming part 500 for forming the bottom surface of the pressure vessel 100 is arranged on the upper part of the molds 300, 310, and 320.

And as shown in FIG. 9(c), the molds 300, 310, and 320 are closed, and the bottom forming part 500 also seals the upper portions of the molds 300, 310, and 320.

In this state, the lower part of the mold 300, 310, 320 is closed by the rib 600.

In this state, in order to perform the blowing operation of the expanded preform 700, the pipe 800 of the air injection device enters the interior of the preform 700 from the lower part of the rib 600, and the air supply port 920 of the air injection device enters the lower part of the rib 600. On the inlet side of the preform 700, after the expansion of the container is completed, air for cooling the container is supplied.

The air supply port 920 of the air injection device is arranged on the upper part of the main body 900. The inside of the main body 900 has a flow path communicating with the air supply port 920 and the air can move, and the outside of the main body 900 has a communication hole 910 communicating with the flow path. .

Therefore, when a hose (not shown) connected to a device for supplying compressed air such as an external compressor (not shown) is connected to the communication hole 910 to supply air, the air passes through the flow located inside the body portion 900. The path moves and discharges toward the air supply port 920.

In addition, the tube 800 of the air injection device is arranged to be able to penetrate the air supply port 920 in the vertical direction. The tube 800 of the air injection device is configured to be able to perform ascending or descending motion by an additional actuator (not shown), and its ascending or descending speed can also be adjusted.

In addition, the outer peripheral surface of the tube 800 of the air injection device is formed with a plurality of discharge holes 801 through which air can be discharged.

When air is injected into the air supply port 920 of the air injection device in this state, as shown in Figure 9(d), the preform 700 is expanded and deformed to conform to the shape of the inner cavity of the closed mold 300, 310, 320 .

As shown in FIG. 9(c), the air supply port 920 is arranged on the inlet side of the preform 700 ascending. In addition, the tube 800 of the air injection device also rises and inserts into the inlet of the preform 700.

Ascending in this state and air is injected as shown by A, the air flows into the communication hole 910, moves along the inside of the body portion 900 and is discharged through the air supply port 920 to flow into the inside of the preform 700 to expand the preform.

The air discharged from the air supply port 920 enters the space between the inlet of the preform 700 and the pipe 800.

The above-mentioned moving path of the air capable of expanding the preform (communicating hole 910 → inside the main body 900 → air supply port 920 → space between the inlet of the preform 700 and the pipe 800 → inside the preform 700) is defined as the first path .

Preferably, the injected air is supplied at room temperature or in a heated state.

In addition, the pressure of the air injected during the expansion of the container is in the first pressure range (for example, 1.5 to 2.0 MPa). This is the pressure range that causes the preform to expand at an appropriate speed to prevent tearing or damage to its surface.

However, the above-mentioned pressure range can be changed without being limited to this.

As shown in Fig. 10(a), air is injected through the air supply port 920, and the preform 700 is expanded and extended by air blowing, and at the same time, the tube 800 of the air supply device rises upward. Here, the upper end of the tube 800 of the air supply device can push up the inner surface of the preform 700 to facilitate the expansion of the expansion agent.

Therefore, the preform 700 is molded into the shape of the pressure vessel 100 conforming to the shape of the inner surface of the mold as shown in FIG. 10(b).

As described above, the mold 320 is formed with the three-dimensional groove 322, and therefore, the three-dimensional portion 122 that matches the shape of the three-dimensional groove 322 can be formed on the container (Figure 2).

When a part of the surface of the preform 700 moves toward the three-dimensional groove 322, a part of the surface presses the label 200 covering the three-dimensional groove 322, so that the label 200 is deformed correspondingly according to the three-dimensional groove 322.

As described above, the label 200 is attached to the inner surface of the molds 300, 310, and 320 during the container molding process.

As described in Figures 4 and 5 above, an adhesive layer 203 is formed on the inner surface of the label 200. The adhesive layer 203 can be melted and adhered at a predetermined temperature (for example, 50°C) or higher, so that it is closely adhered to the preform When the surface of 700 is heated, the surface temperature of the preform 700 and the temperature of the molds 300, 310, 320 are melted, and the label 200 is firmly fixed to the surface of the pressure vessel 100.

In addition, a three-dimensional portion 122 is formed on the surface of the pressure vessel by the three-dimensional groove 322 (refer to FIG. 2 ). The three-dimensional portion 122 is covered by the label 200, and together with the label 200, gives the pressure vessel a visual three-dimensional feature.

When the preform is in close contact with the molds 300, 310, 320, it is deformed and formed into a container shape and is labeled with air that has a pressure in a second pressure range higher than the first pressure range (shown by B). ). The air movement path is the same as the first path, the difference is that the pressure range is higher.

The temperature of the injected air is kept at room temperature or heated (for example, 40~90°C).

Its purpose is to further ensure the shape of the container itself or the shape of the three-dimensional portion or the specific shape of the end portion of the three-dimensional portion after the preform 700 has expanded to a predetermined degree, while ensuring that the label can be more firmly adhered to the surface of the container, especially the three-dimensional shape is formed s surface.

Here, it is preferable that the second pressure range is larger than the first pressure range (for example, a pressure range (for example, 2.5 to 4.0 MPa (25 to 40 bar)) that is higher than 1.5 to 2.0 MPa (15 to 20 bar). However, the pressure range can be changed without being limited to this.

Then, as shown in Fig. 10(c), a process of injecting cooled air through the pipe 800 of the air injection device to cool the container is required.

Here, the air flows into the container 100 through the tube 800 of the air injection device to cool the container 100 and is discharged from the space between the inlet of the container and the tube 800 of the air injection device. This path is defined as the second path and denoted by C.

When the mold is opened immediately after the container is formed, the difference between the atmospheric temperature and the container temperature causes the container to shrink, resulting in defects such as container deformation and deviation, and can cause the label to fall off the container.

However, in order to solve this problem, if the mold is waited for a predetermined time to cool the mold, not only the productivity is low, but the label may not be properly adhered to the container when the mold itself is cooled.

To solve this disadvantage, cooling air is supplied to the inside of the molded container and discharged to maximize the productivity of the container.

Here, the injection pressure of the cooling air is preferably 1.5 to 4.0 Mpa (15 to 40 bar), but it can be changed without being limited to this. The temperature of the air can be room temperature air or air that is cooler than it.

In order to make the adhesive layer 203 easy to melt during the molding process of the container shown in Figures 9 and 10 to ensure that the label 200 is firmly attached to the surface of the pressure vessel 100, it is preferable to maintain the surface temperature of the molds 300, 310, and 320 At 40~80℃.

For this reason, it is preferable to continuously heat the molds 300, 310, and 320 as shown in T in FIG. 9 and FIG. 10.

However, the temperature can also be adjusted accordingly outside the above-mentioned temperature range according to the situation.

In addition, the material constituting the pressure vessel of the present invention is a plastic resin, preferably a polyethylene terephthalate (PET) material suitable for a pressure vessel.

However, since the surface temperature of the preform made of PET is 90-100°C, its surface latent heat is not high. Especially compared with the surface temperature of the preform made of PE which can reach 180~200℃, the surface latent heat is significantly lower.

Therefore, in the case of forming a container with a PET preform, since the latent heat is small, the latent heat of the PET preform alone is not sufficient for perfect and firm labeling.

Therefore, it is necessary to additionally heat the molds 300, 310, 320 as above to make the labeling well.

For this reason, the present invention introduces the step of heating the mold instead of cooling the molds 300, 310, 320, supplementing the low latent heat of the PET preform so that the label is more easily attached to the surface of the container and the three-dimensional shape formed on the surface of the container, so that the attachment state is firm .

However, when the mold is heated as described above, there is a problem of hindering the cooling of the container, so a step of injecting cooling air through the pipe 800 of the air injection device (indicated by C in FIG. 10) is introduced.

The cooling air can be discharged from between the inlet of the container and the pipe 800 after being injected into the inside of the container to cool the container.

As above, heating the molds 300, 310, and 320 makes the label adhere firmly to the container and injects cooling air into the container to increase the production speed of the labeled container by increasing the cooling rate of the container.

After the container cooling step is completed, the tube 800 of the air injection device is lowered as shown in Figure 10(d), then the molds 300, 310, 320 are opened, and the labeling and cooling-finished container 100 is taken out to the outside.

Figure 11 is a flowchart schematically showing the steps of manufacturing a three-dimensional shaped and labeled container according to the present invention.

First, as shown in Figure 9(a), the molds 300, 310, 320 (refer to Figures 9 and 10) formed with three-dimensional grooves 322 (refer to Figures 9 and 10) are opened (S1101), and heated Molds 300, 310, 320 (S1102).

Then, as shown in Figure 9(a), with the mold open, use the label supply device to paste the label on the inner surface of the mold (S1103). Here, the mold has suction flow paths 311 and 321 (Figures 9 and 10), and the label can be attached to the inner surface of the mold by vacuum suction pressure.

And, as shown in FIG. 9(b), a preform (preferably a PET preform) 700 is arranged in the space between the opened molds (S1104).

The preform 700 is located in the lower region of the space between the molds 300, 310, 320 under the support of the rib 600.

In this state, the molds 300, 310, and 320 are closed as shown in Figure 9(c) (S1105), the air supply port 920 is raised and inserted into the preform 700, and heated air is injected according to the first pressure range ( S1106).

In this case, as shown in Fig. 10(a), the preform 700 expands, and the tube 800 of the air injection device rises accordingly.

Therefore, the expansion of the preform is completed to deform into the shape of the container, and the container is formed with a three-dimensional shape consistent with the shape of the three-dimensional groove 322 in the mold 320, and the label 200 is attached to the surface of the container by in-mold labeling.

In this state, the three-dimensional form formed in the container is completed, and in order to label more firmly, heated air is injected into the container in a second pressure range higher than the first pressure range (S1107).

Since the mold is continuously heated, it cools the labeled container, and the cooling air is injected into the container through the pipe 800 of the air injection device (S1108).

After cooling, the tube 800 and the air supply port 920 of the air injection device are lowered, and then the molds 300, 310, and 320 are opened (S1109), and the three-dimensionally labeled container is taken out to the outside (S1110).

The present invention has been described above with reference to the embodiments shown in the drawings, but this is only used to illustrate the invention, and those of ordinary skill in the art to which the present invention pertains should understand that various modified or equivalent embodiments can be obtained based on the above detailed description.

Therefore, the true scope of the present invention depends on the technical solution of the present invention.

100‧‧‧Pressure vessel 110‧‧‧Entrance part 120‧‧‧Body part 121‧‧‧Break part 122‧‧‧Three-dimensional part 200, 1200‧‧ Label 201, 1201‧‧‧Material part 202, 1202 ‧‧‧Printing layer 203‧‧‧Adhesive layer 300, 310, 320‧‧‧Mold 311, 312‧‧‧Adsorption flow path 322‧‧‧Three-dimensional groove 400‧‧‧Supply device 401‧‧‧Vertical arm 402‧‧ ‧Supporting element 403‧‧‧Tube 500‧‧Bottom forming part 600‧‧‧Rib 700‧‧‧Preform 800‧‧‧Tube 801 of the air injection device 801‧‧‧Exhaust hole 900‧‧‧Main body 910‧ ‧‧Connecting hole 920‧‧‧Air supply port A, B, C‧‧‧Air movement path S1101, S1102, S1103, S1104, S1105, S1106, S1107, S1108, S1109, S1110‧‧‧Step T‧‧‧Display Heating state

Figure 1 is a perspective view of a pressure vessel with an in-mold label formed with three-dimensional characters;

Figure 2 is a perspective view of the pressure vessel body of the pressure vessel of Figure 1 separated from the label;

Figure 3 is a side view of the pressure vessel in Figure 1;

Figure 4 is a plan sectional view of the pressure vessel in Figure 1;

Figure 5 is a horizontal cross-sectional view of the state where the label is removed from the pressure vessel of Figure 1;

Figure 6 is a perspective view of a pressure vessel with an in-mold label formed with a three-dimensional portrait;

Figure 7 is a front view of the pressure vessel in Figure 6;

Figure 8 is a side view of the pressure vessel in Figure 6;

Figures 9 to 10 show the manufacturing sequence of a pressure vessel with an in-mold label formed with a three-dimensional portion according to the present invention;

Figure 11 is a flowchart of the present invention.

S1101, S1102, S1103, S1104, S1105, S1106, S1107, S1108, S1109, S1110‧‧‧Steps

Claims (3)

A method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape includes: heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to a three-dimensional shape to be formed on the surface of a PET container; and opening the Steps of the mold; attaching a label to the inner surface of the mold and making at least a part of the label attached to the inner surface of the mold cover the three-dimensional groove; placing a PET preform of the PET container upside down on a rib The state of the mold is arranged inside a cavity of the mold; the mold is closed, the upper part of the mold is sealed by a bottom forming part and the lower part of the mold is sealed by the ribs, and passes through a first path with a predetermined range of The step of injecting air into the PET preform by pressure to expand the PET preform; causing the label attached to the surface of the PET preform to interact with the expanded PET preform during the process of attaching the expanded PET preform to the label. The surface of the PET preform is deformed into a three-dimensional shape corresponding to the three-dimensional groove by an air pressure; the step of maintaining the heated state makes the adhesive layer of the label adhere to the surface of the PET preform; The step of injecting cooling air into the PET preform that expands and deforms into the shape of the PET container; and separating the mold and taking out the PET container having a three-dimensional shape and attached with the corresponding deformed label from the mold A step of; Wherein, the step of expanding the PET preform is realized by injecting air according to a first pressure range, and then further comprising the step of injecting air with a second pressure range higher than the first pressure range; wherein, the first path is It is realized by using an air supply port that can be raised and lowered and can be arranged at the entrance of the PET preform, and the second path is realized by using a tube of an air injection device that can be raised and lowered and can be inserted into the inside of the PET preform. of. According to the method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape as described in item 1 of the scope of the patent application, the label includes: a base material part; the adhesive layer is disposed on the inner surface of the base material part and has a It melts when the temperature is above a predetermined temperature; and a printing layer, which is arranged on the outer surface of the base material, is printed with a pattern, a pattern, a picture, a letter or a number corresponding to the convex or concave portion of the three-dimensional shape , Wherein the step of attaching the label to the inner surface of the mold is a step of attaching the label to the mold and making the position of the printing layer correspond to the three-dimensional groove. A method for manufacturing a pressure vessel with an in-mold label and a three-dimensional shape includes: heating a mold formed with a three-dimensional groove, wherein the three-dimensional groove corresponds to a three-dimensional shape to be formed on the surface of a PET container; opening the mold The step; the step of attaching a label to the inner surface of the mold and making at least a part of the label attached to the inner surface of the mold cover the three-dimensional groove; The step of placing a PET preform of the PET container in a state of being placed upside down on a ribbed inside a cavity of the mold; closing the mold, the upper part of the mold is sealed by a bottom forming part and the lower part of the mold is The ribs are sealed, and an air injection device located outside the mold is used to inject air into the PET preform with a pressure of a predetermined range to expand the PET preform; the label attached to the surface of the PET preform is During the process of attaching the expanded PET preform to the label, the surface of the expanded PET preform is deformed by an air pressure to correspond to the three-dimensional groove and has a three-dimensional shape; the step of maintaining the heated state , The adhesive layer of the label is attached to the surface of the PET preform; the step of injecting a cooling air into the inside of the PET container formed by the expanded PET preform; and separating the mold and removing it from the mold. The step of the PET container with the three-dimensional shape and the label attached with the corresponding deformation; wherein, the step of expanding the PET preform is by being able to be arranged at the entrance of the PET preform and capable of supplying air to the inside of the PET preform The step of expanding the PET preform includes: injecting air with a first pressure range; and after injecting air with the first pressure range, using a pressure higher than the first pressure The step of injecting air into a second pressure range of the range; wherein, the step of cooling the PET preform is configured to be able to insert the PET The pipe of the air injection device inside the preform injects the cooling air into the inside of the PET preform.

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