KR20110111012A - In-mold injection molding method and device for the same - Google Patents

In-mold injection molding method and device for the same Download PDF

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Publication number
KR20110111012A
KR20110111012A KR1020100030379A KR20100030379A KR20110111012A KR 20110111012 A KR20110111012 A KR 20110111012A KR 1020100030379 A KR1020100030379 A KR 1020100030379A KR 20100030379 A KR20100030379 A KR 20100030379A KR 20110111012 A KR20110111012 A KR 20110111012A
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KR
South Korea
Prior art keywords
mold
container
label film
resin
label
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KR1020100030379A
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Korean (ko)
Inventor
최연욱
Original Assignee
주식회사 비앤씨
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Priority to KR1020100030379A priority Critical patent/KR20110111012A/en
Publication of KR20110111012A publication Critical patent/KR20110111012A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14688—Coating articles provided with a decoration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
    • B29C2045/14918—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Disclosed are an in-mold injection method and apparatus for in-mold injection molding not only on the outer surface but also the bottom surface of an IML container. The in-mold injection method according to the present invention comprises the steps of providing a label film for the outer surface and the bottom surface of the ILM container in the injection method of the ILM container, the movable mold is the fixed-side mold By moving to the label film, the label film is pressed, and the resin contained in the injection portion in the state that the label film is pressed through the gate formed in the fixed-side mold to the resin is the movable-side mold and the Comprising the step of filling into the space between the fixed mold, wherein the resin is injected is characterized in that a plurality of gates, the label film is in-mold on both the outer surface and the bottom surface of the LM container. According to this configuration, the label film is in-mold to the bottom surface as well as the outer surface of the LM container can be blocked as much as possible to prevent the product in the LM container is exposed to external moisture or air.

Figure P1020100030379

Description

IN-MOLD INJECTION MOLDING METHOD AND DEVICE FOR THE SAME}

The present invention relates to an in-mold injection method and an apparatus thereof, and more particularly, to in-mold injection molding of an in-mold label (IML) container to an in-mold injection molding not only on the outer side but also on the bottom. An injection method and a device therefor.

In general, IML cups (IML cups, In-Mold Label cups) for storing drinks for sale is made of a material such as polypropylene (polypropylene), polyethylene (polyethylene), polystyrene (glass) or synthetic resin.

When producing resin type, it is molded into bottles, cups, and various other forms. Labels printed with the brand and description of the product are attached to the outer surface of the container by adhesive, or molded into the container. It can be molded by in-mold molding with a sense of unity on the outer surface of the city.

For reference, In-Mold is a resin film formed by putting a printed film or the like into a mold and various patterns and logos are integrally coated on the surface. It is applied to complex shapes such as, or is applied to many containers with printing and graphic specifications. This in-mold technique is widely used technology such as washing machines, air conditioners, microwave ovens, various panels, and the like. At this time, since the ILM container manufactured by in-mold molding is used as a disposable container, it is usually molded and manufactured by injection molding in a thin thickness.

As described above, the IML container of the in-mold molding method has a structure in which a label film of foil is coated on an outer surface, in particular, a side of an appearance. That is, a general IMP container has a circular or rounded rectangle on its bottom surface, and is generally formed in a cylindrical or square column shape, and only the label film is in-mold formed on the side, and is not in-mold until the bottom surface.

Such IML containers are usually used to accommodate foodstuffs, and in particular, are used as containers such as dairy products. It is an important issue that these products are blocked from external oxygen and do not spoil the food inside.

However, the conventional IML container has a problem that the shelf life is limited because external oxygen is not completely blocked and external oxygen can penetrate as time passes.

Therefore, it is urgent to study the technology that can increase the shelf life by blocking the contact of oxygen or moisture and dairy products in the container as much as possible.

In addition, the conventional ILM container has a problem that the label film is formed only on the side, the advertising effect is lowered. The effect of advertising on the product's position in the market is a very important factor, and there is a lack of consideration for the contribution of the container as a means of promoting various features of the product that can appeal to consumers. . After all, IML container needs research to provide a multi-purpose use to serve the product promotion, in addition to the original purpose of accommodating food products and increasing the shelf life.

The present invention has been made in view of the above problems, and in order to provide an in-mold injection method and apparatus for in-mold injection to the bottom surface as well as the outer surface in the case of in-mold injection molding of the EL container do.

Another object of the present invention is to provide an in-mold injection method and apparatus for manufacturing an EL container which can extend the shelf life as much as possible, especially when dairy products are contained in the EL container.

Still another object of the present invention is to provide an in-mold injection method and apparatus for manufacturing an IM container that can have a maximum advertising effect in a limited space.

In-mold injection method according to an embodiment of the present invention for achieving the above object in the injection method of the IML (IML, In-Mold Label) container, the outer surface of the IML container on the fixed side mold And a step of providing a label film for the bottom surface, the step of pressing the label film by moving the movable side mold to the fixed side mold, and the resin contained in the injection part while the label film is pressed. Spraying through the gate formed in the fixed side mold to fill the space between the movable side mold and the fixed side mold, wherein the resin is injected into a plurality of gates, The label film is characterized in that both the outer surface and the bottom surface is in-mold.

In addition, the IML container molded in-mold in the same manner as above.

In-mold injection apparatus according to an embodiment of the present invention, in the in-mold injection device of the ML container, the fixed side mold, the gate is formed in which the resin flows, the pressing through the selective movement facing the fixed side mold A label film is provided between the movable side mold, the fixed side mold, and the movable side mold, wherein the label for the outer side and the bottom side can be molded in both the outer side and the bottom side of the EL container. A label film providing part for providing a film, and an injection part connected to the fixed side mold to receive a resin for forming the IML container therein and spraying the resin to a gate of the fixed side mold, wherein the gate Is formed in plural, it is possible to in-mold the label film on both the outer surface and the bottom surface of the LM container.

In this case, the plurality of gates are spaced apart from each other to be symmetric with respect to the center of the fixed side mold.

According to the present invention having the above configuration, first, since the label film is in-mold not only to the outer surface of the container but also to the bottom surface, in producing a container that needs to attach the label film to the bottom surface, productivity is improved. Can be.

Second, the label film in-mold not only the outer surface of the container but also the bottom surface can block the moisture and air from the outside to increase the shelf life of the product in the container, and when the container is particularly sensitive to the shelf life of dairy products The effect can be maximized further.

Third, the label film is in-mold not only to the outer side of the container but also to the bottom, so that the advertisement effect by the bottom film can be further enjoyed, and the limited space of the container can be utilized to the maximum for the advertisement of the product.

1 is a configuration diagram schematically showing an in-mold injection apparatus 1 according to an embodiment of the present invention,
2a to 2c are cross-sectional views schematically showing the formation of the gate in the fixed side mold of FIG.
3 is a flow chart showing an in-mold injection method according to an embodiment of the present invention,
Figure 4a is a cross-sectional view schematically showing a conventional container in which the label film is in-mold injection, and
Figure 4b is a schematic cross-sectional view showing a container produced by the in-mold injection method of the present invention.

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

In-mold injection device 1 according to an embodiment according to the invention is preferably illustrated as being used for the injection molding of the In-Mold Label (2) container, that is, generally containing beverages, etc. It is used to in-mold the container 2 for it. The beverage is preferably exemplified by dairy products, but is not limited thereto. The in-mold injection apparatus 1 of the present invention includes a fixed side mold 10, a movable side mold 20, a label film providing unit 30, and an injection unit 40. 1 is shown for more detailed description.

1 is a configuration diagram schematically showing an in-mold injection apparatus 1 according to an embodiment of the present invention.

The fixed side mold 10 is a mold providing a basic mold of the container 2 to be subjected to in-mold injection. In the following description, but illustrated as a mold for the AM container 2 in a cup shape of a circular cross section, but is not limited to this. The fixed side mold 10 is provided with a gate 11 into which the resin 42 is injected. In this case, in order to be in-molded to the bottom surface of the container 2 to be in-mold injection, it is preferable that a plurality of gates 11 are formed.

2A to 2C are provided to describe in detail the formation shape of the gate 11. 2A to 2C are cross-sectional views of the gate-formed portion that forms the bottom surface of the container 2 in the stationary mold 10.

For example, the plurality of gates 11 may be formed symmetrically with respect to the center of the circular cross section as shown in FIG. 2A. In addition, as shown in FIG. 2B, the formation form is the same as that of FIG. 2A, and the two gates 11 may be formed as a group with each other. Alternatively, as illustrated in FIG. 2C, a plurality of gates 11 may be formed to be biased to one side. If at least two of these gates 11 are formed, various shapes may be possible while controlling the amount or speed of resin injected.

The movable side mold 20 is located facing the fixed side mold 10. In addition, when the movable side mold 20 and the fixed side mold 10 come into contact with each other, the shape of the movable side mold 20 is such that the space therebetween becomes the shape of the container 2 to be subjected to in-mold injection. This is designed. The movable side mold 20 is involved in the pressing of the in-mold injection process together with the fixed side mold 10 through a selective movement. As the driving of the movable side mold 20, various known driving can be adopted.

The label film providing unit 30 provides label films 31 and 32 between the fixed side mold 10 and the movable side mold 20. That is, the label film providing unit 30 is positioned at a predetermined distance from the side of the fixed side mold 10 and the movable side mold 20, the label film used for in-mold molding of the container ( 31, 32). At this time, the label film (31, 32) is the outer label film 31 and the bottom label film 32 to be able to in-mold both the outer surface and the bottom surface of the container (2) that is the object of in-mold injection Include.

In FIG. 1, the outer label film 31 and the bottom label film 32 are separately provided, but are not limited thereto. The outer label film 31 and the bottom label film 32 are not limited thereto. ) May be integrally formed. However, when formed integrally, the outer label film is not shown, so that when the resin 42 is injected and injected through the gate 11, the resin 42 can hit the movable mold 20 It is preferable that a hole or a hole is formed in a portion where the 31 and the bottom label film 32 are continued.

The injection part 40 is connected to the fixed side mold 10 to inject the resin 42. In more detail, the injection part 40 includes a nozzle 41 and accommodates the resin 42 therein. The nozzle 41 is in close contact with a portion connected to the gate 11 of the fixed side mold 10, and when the resin 42 is injected from the nozzle 41, the injected resin 42 is injected into the gate 11. It is injected into the inside of the fixed side mold 10 through.

In this case, the plurality of gates 11 are formed as described above. However, as shown in FIG. 1, one nozzle 41 may be formed, and the resin 42 injected through the nozzle 41 may be divided and injected into the plurality of gates 11 formed therein, or Although not shown, a plurality of nozzles 41 may be formed and connected to the plurality of gates 11, respectively, to inject the resin 42.

The operation of the in-mold injection apparatus 1 according to an embodiment of the present invention having the configuration as described above will be described in detail together with the in-mold injection method according to an embodiment of the present invention.

In-mold injection method according to the invention is the step of providing the label film (31, 32) on the fixed side mold 10 (S1), the label film 31, 32 is pressed by the movable side mold 20 Step S2, and step S3 in which the resin 42 is injected through the plurality of gates 11. 3 is shown for more detailed description. 3 is a flowchart illustrating an in-mold injection method according to an embodiment of the present invention.

First, label films 31 and 32 for the container 2 to be subjected to in-mold injection molding are provided at a predetermined position on the fixed mold 10 from the label film providing unit 30 (S1). In particular, the label films 31 and 32 include an outer label film 31 and a bottom label film 32 of the container 2 to be subjected to in-mold injection molding. The outer label film 31 and the bottom label film 32 may be formed integrally as described above.

When the label films 31 and 32 are provided as described above, the movable side mold 20 is brought into close contact with each other while moving toward the fixed side mold 10, and the label films 31 and 32 are pressed (S2). ). That is, the label films 31 and 32 are preferably mounted on the fixed side mold 10. In addition, the bottom label film 32 is preferably mounted on the fixed mold 10 so as not to overlap the gate (11). For example, when the gate 11 is formed as shown in FIG. 2A, the bottom label film 32 is preferably positioned between both gates 11. However, the position is not necessarily limited to this, and various modifications may be possible in which the injected resin 42 may pass through the bottom label film 32 and hit the movable mold 20.

On the other hand, when the outer label film 31 and the bottom label film 32 are integrally formed, the label films 31 and 32 provided between the fixed side mold 10 and the movable side mold 20 are operated. The label films 31 and 32 are bent while the side mold 20 is pushed toward the fixed side mold 10. In this case, as described above, a hole or a hole into which the resin 42 may be injected may be formed in a portion where the outer label film 31 and the bottom label film 32 are connected to each other. It is preferably located on the plurality of gates 11. Therefore, the resin 42 injected and injected from the plurality of gates 11 may pass through the hole or the hole and hit the movable mold 20.

Thereafter, the nozzle 41 of the injection part 40 is in close contact with the part connected to the gate 11 to spray the resin 42. The injected resin 42 is injected through the plurality of gates 11 and filled with a space formed between the fixed side mold 10 and the movable side mold 20 while hitting the movable side mold 20 (S3). .

At this time, the label films 31 and 32 are both in-mold on the outer surface and the bottom surface of the container 2 to be subjected to in-mold injection molding. Thus, in order to in-mold the bottom surface of the container 2, it is preferable that a plurality of gates 11 are formed, that is, a plurality of gates 11 into which the resin 42 is injected are formed. It can be adjusted to optimize the process of in-mold injection to the bottom of the container (2).

4a and 4b are presented for more detailed description. Figure 4a is a cross-sectional view schematically showing a container (2) conventionally in-molded only the outer side, Figure 4b schematically shows a container (2) in-mold to the bottom surface through the in-mold injection method according to the present invention One cross section.

As shown in Figure 4b, not only is the outer label film 31 in-mold molded on the outer surface of the container 2 by the in-mold injection method according to the invention, the bottom label film 32 to the bottom surface The in-mold is molded, wherein the shape of the bottom surface of the container 2 can be flat or grooved in, and various other shapes are possible. This in-mold injection molding to the bottom surface of the container 2 can save the trouble of attaching the film to the bottom separately after injection molding. In addition, especially when the dairy product is contained in the container 2, the shelf life of the bar label film 32 in-mold on the bottom surface of the container 2 to block moisture and air from the outside to increase the shelf life, The effect is maximized.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1: In-mold injection device 10: Fixed side mold
11: gate 20: upper part of pressure part
30: label film providing unit 31: the outer label film
32: floor label film 40: injection part
41: nozzle 42: resin

Claims (4)

In the injection method of IML (In-Mold Label) container,
Providing label films for the outer and bottom surfaces of the IM container on a fixed side mold;
Moving the mold on the movable side to the stationary mold to press the label film; And
A step of filling the resin into the space between the movable side mold and the fixed side mold by injecting the resin contained in the injection part through the gate formed in the fixed side mold while the label film is pressed;
Including,
A plurality of gates the resin is injected is formed, the in-mold injection method, characterized in that the label film is in-mold on both the outer surface and the bottom surface of the LM container. An in-mold molded ILM container made by the method of claim 1. In the in-mold injection device of the IML (In-Mold Label) container,
A fixed side mold having a gate through which resin is introduced;
A movable side mold engaged in pressurization through a selective movement while facing the fixed side mold;
A label film is provided between the fixed side mold and the movable side mold, and the label film provides a label film for the outer side and the bottom so that both the outer side and the bottom side of the IM container can be in-mold. Providing unit; And
An injection part connected to the fixed side mold to receive a resin for forming the IML container therein and to spray the resin to a gate of the fixed side mold;
Including,
The gate is formed of a plurality, the in-mold injection apparatus, characterized in that the label film can be in-mold on both the outer surface and the bottom surface of the LM container. The method of claim 3,
The plurality of gates are in-mold injection apparatus, characterized in that spaced apart so as to be symmetrical with respect to the center of the fixed mold.
KR1020100030379A 2010-04-02 2010-04-02 In-mold injection molding method and device for the same KR20110111012A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021041942A (en) * 2019-09-08 2021-03-18 四国化工機株式会社 container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021041942A (en) * 2019-09-08 2021-03-18 四国化工機株式会社 container

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