JP2003291940A - Container with transparent window and method for molding the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow container provided with a transparent peep window on the barrel wall part of the container comprising various colored synthetic resins and with a displaying body such as a label stuck on the barrel wall face of the container. <P>SOLUTION: A transparent part provided on a sticking body consisting of a resin film such as the label mounted in a mold for molding and fixed on the inner face of an outer mold is made under a condition where it is pushed on the core face of an inner mold by an apex part of a pushing rod slidably provided on the outer mold, and a molten thermoplastic synthetic resin is injected into a cavity by means of an injection molding machine to mold the hollow container with a specified shape, and at the same time, the resin film is in-mold- molded on the container face to integrate them, and the transparent window part through which a content can be confirmed is formed thereby on the barrel wall part of the hollow container to mold the container with the transparent window. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow container provided with a peep window capable of confirming the existence and remaining amount of contents in the container, color, shape, etc.
In particular, the state of the contents in the container can be confirmed by forming a viewing window made of a transparent film made of a thermoplastic synthetic resin on a part of the body wall of a hollow container molded by injection molding of a thermoplastic synthetic resin. The present invention relates to a container with a window.

[0002]

2. Description of the Related Art Products that are provided to consumers in a state where various contents are housed in hollow containers are generally of various types as hollow containers in order to attract the consumer's attention.
Opaque containers with various colors are used, so even if the consumer wants to confirm the shape and color of the contents, the presence of contents, etc. when necessary, something other than a transparent container is used. Since it is very difficult to check, it is often inconvenient to use. As a hollow container capable of confirming the contents of the container by eliminating such inconvenience, containers such as those described in JP-A-9-301388 and JP-A-2001-287720 have been proposed. ing.

In order to form a hollow container whose contents can be confirmed with a structure as shown in the above-mentioned Japanese Patent Laid-Open No. 9-301388, a thermoplastic resin forming a transparent portion and a thermoplastic resin forming an opaque portion are formed. A molding apparatus for coextrusion molding is required, and the same as in JP 2001-287A.
In the invention as described in Japanese Patent Publication No. 720, after forming a part forming an opaque container body and a part forming a transparent display window as separate bodies, both parts are integrated and then formed into a hollow container. However, since there is a risk that a gap will be created between the joints of both members and the contents may leak, it is difficult to reduce the manufacturing cost of each of these hollow containers. There is a point.

In addition, various conventionally used containers are provided with various patterns and decorations on the surface thereof to attract the eyes of consumers, and indications of quality of contents and cautionary notes are described. It is often used that various display bodies such as labels are attached. In such a hollow container provided with various display bodies, the display body serves as a light shield and can prevent deterioration such as discoloration or deterioration of the contents to some extent, and thus is transparent or translucent. The container in which the container body is formed by using the above synthetic resin and the display body is adhered to store the contents is not likely to deteriorate the contents extremely.

For this reason, the display body 23 to be attached to the surface of the container body formed of transparent or translucent synthetic resin is attached to the joint end 23a with a slight gap. By wearing it, as shown in Figure 4,
A hollow container 21 having a structure in which a slit-shaped transparent wall surface 22a is provided in a body wall portion 22 of the container is used so that the contents contained in the container can be visually observed from the outside. In order to form the hollow container 21 having such a structure, as shown in FIG. 5, a display body 23 having a shape suitable for sticking to the surface of the container body is formed in an expanded state. The synthetic resin is set by setting it in the outer mold 25a of the injection mold 25 and closing the mold, and then injecting and injecting the molten resin 28 from the injection molding machine 27 through the injection runner 26 provided in the inner mold 25b. On the surface of the plastic container 2
3 is in-molded to form the adhered hollow container 21.

The container 21 molded in this way can be manufactured at a lower cost than a container with a window having the above-mentioned structure, but the slit-shaped transparent body wall 22a. The display body 23 must be attached to the entire surface of the container body except for the part, and the container body must be made of a transparent or translucent synthetic resin, so that it is colored in another color. There is a restriction that it cannot be molded using resin. Therefore, the container body can be formed of synthetic resin colored in various colors, and various indications can be made only on necessary portions.
In addition, it is desired to provide a hollow container that allows the contents in the container to be easily visually confirmed from the outside and that can be manufactured easily at low cost.

[0007]

DISCLOSURE OF THE INVENTION The invention of the present application was devised so that the above-mentioned problems can be solved and the contents in a container can be easily visually confirmed from the outside. In addition to forming a transparent viewing window on the body wall of the hollow container of various colors, the hollow container is formed so that various indicators can be attached only to the necessary parts of the surface of the container body. An object of the present invention is to provide a hollow container with a transparent window, which can be manufactured easily and inexpensively without the contents leaking through the transparent viewing window.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a transparent synthetic resin film is mounted in an injection molding die, and a portion forming a transparent viewing window is formed in an inner die. While being pressed against the core surface of the container, inject the molten colored synthetic resin and perform in-mold molding in the injection mold to attach a transparent resin film to the barrel wall of the container body. , A hollow made of thermoplastic synthetic resin with a transparent window that forms a peep window part made of a transparent resin film on a part of the body wall of the container body so that the contents in the container can be seen from the outside. Form a container.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention uses a transparent synthetic resin film, which also serves as a cover for protecting and strengthening the label of the contents and the usage of the container and the body wall of the container, by injection molding. Mount and fix in the mold and close the mold. Subsequently, the pressing rod slidably provided on the outer mold is advanced, and the transparent synthetic resin film is pressed against the inner core surface of the inner mold by the tip of the rod so that the film is melted by the injection molding machine. The colored synthetic resin is injected into an injection molding die. The molten resin injected into the injection mold flows from the runner into the cavity of the mold and fills the entire cavity while filling the space between the core surface of the inner mold and the resin film surface. The resin film is molded into a predetermined shape, and at the same time, the resin film is molded into an in-molded hollow container.

By cooling the hollow container molded in this way and taking it out from the molding die, the transparent resin film is pressed against the core surface by the tip of the pressing rod to form a transparent viewing window. A hollow container can be obtained. The hollow container molded in this way becomes a product after being filled with the inside of the container after the opening is sealed and then packaged. What kind of contents are contained in such a product? It is possible to easily check the color and the amount of what color is contained in the transparent viewing window without opening.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A transparent window container according to the present invention will be described in detail below with reference to the drawings based on an optimum embodiment. Hollow container 1 with transparent window of the present invention
As shown in FIG. 1, a transparent window 4 formed of a transparent resin film 3 is provided on a part of a body wall 2a of a container body 2 made of a thermoplastic synthetic resin and having a substantially cylindrical shape. Is. The transparent window 4 is provided with a transparent portion in a part such as a label in which contents are displayed on a synthetic resin film or a cover made of a synthetic resin film for protecting the trunk wall of the container by protection. Film or a transparent film as a whole, and has the same strength as the barrel wall of the container body.

In order to mold the hollow container 1 provided with the transparent window (peep window) 4 as shown in FIG. 1 described above, as shown in FIG. 2, the injection molding metal opened vertically (or left and right). The transparent resin film 3 is inserted into the outer die (lower die) 12 of the die 11 and fixed at a predetermined position. Subsequently, the molding die is closed, and as shown in FIG. 3, the pressing rod 14 slidably provided on the outer die 12 is advanced to move the resin film 3 to the inner die (upper die) 13. After being pressed against the inner core surface 13a, the thermoplastic synthetic resin 16 which is colored and melted in various colors is injected by the injection molding machine 15 from the gate portion 12a provided at the bottom of the outer mold 12 into the molding cavity. To do.

The molten resin 16 injected from the gate portion 12a of the outer molding die 12 into the molding die 11 as described above.
Flows between the resin film 3 and the core surface 13a and fills the cavity. At that time, in the portion where the resin film 3 is pressed against the core surface 13a by the tip of the pressing rod 14. The molten resin flows around the tip of the pressing rod 14 to be molded into a container having a predetermined shape, and at the same time, the resin film 3 is molded in-mold.

When the transparent resin film 3 is molded in-mold as described above, the portion of the transparent resin film 3 which is not pressed by the pressing rod 14 against the core surface 13a is integrated with the molten resin, and the pressing rod 14 is pressed. The portion pressed by the front end portion of is formed in the transparent window 4 in which a part of the body wall portion 2a of the hollow container 1 is a transparent body wall. Then, after the hollow container is cooled by injection molding as described above, the pressing rod 14 is retracted and then the molding die 11 is opened to take out the hollow container 1 molded into a predetermined shape.

The hollow container 1 molded in this way is
After the contents to be accommodated inside are filled, the opening is completely sealed by the lid member that can be sealed to form the product.
Such a product has a transparent window 4 on a part of the container wall.
Since it is formed, it is possible to easily confirm what kind of contents and what kind of color is contained inside the container by looking through the transparent window, The strength of the container can also be increased by the resin film forming the window portion 4.

In the above-mentioned embodiments, the transparent resin film 3 has a size such that it can be in-molded on the entire outer peripheral surface of the body wall 2 of the container, but the present invention is limited to such a material. However, a resin film having an appropriate size that covers the portion where the transparent window 4 is provided and the vicinity thereof is partially in-molded or insert-molded on the body wall portion 2 of the container. It is also possible to form a transparent window by using the transparent resin film 3, and it is preferable that the transparent resin film 3 is made of a resin having a mutual melting property with the resin forming the container body.

According to the present invention, a transparent resin film is provided by in-molding or insert-molding on the container body in order to provide the transparent window part on a part of the body wall of the hollow container as described above. Therefore, it is possible to easily provide a transparent window also in a colored container in which the main body of the hollow container is molded with various colored synthetic resins or in a container molded with a foaming resin. Further, the above-mentioned embodiment was a cup-shaped deep-bottom cylindrical container as a hollow container, but the present invention is not limited to such a container,
Even in the case of a hollow container having a bottle shape or another shape, a transparent window can be easily provided on the body wall portion.

[0018]

EFFECTS OF THE INVENTION The windowed container of the present invention is such that a part of a transparent resin film mounted and fixed in an injection molding die or a transparent part of an adhered body such as a label made of a resin film is used as a pressing rod. A thermoplastic synthetic resin is injection-molded in a state of being pressed and closely adhered to the core surface of the molding die by, and the resin film is in-molded to be molded into a predetermined shape, thereby forming a part of the wall of the hollow container. Since the transparent barrel wall is formed in the portion, the transparent window portion can be easily formed as compared with the conventional one, so that the manufacturing cost of the container can be reduced. Further, in order to form the container of the present invention, since the resin film to be in-molded only needs to have a transparent viewing window portion, it is possible to easily provide a transparent window portion even in a colored container, Further, the molded container is reinforced with the resin film.

[Brief description of drawings]

FIG. 1 is a perspective view showing a transparent container with a window according to the present invention.

FIG. 2 is a cross-sectional view of an injection molding device that molds the windowed container shown in FIG.

FIG. 3 is a cross-sectional view showing a step of forming a window portion on a body wall portion of a hollow container.

FIG. 4 is a perspective view showing a conventional windowed container.

5 is a cross-sectional view showing a step of molding the windowed container shown in FIG.

[Explanation of symbols]

1. Hollow container 2. Container body 2a. Body wall 3. Resin film 4. Transparent window 11. Molding die 12. External type 12a. Gate section 13. Inner mold 13a. Core face 14. Push rod 15. Injection molding machine 16. Molten resin

Claims (4)

[Claims] 1. A transparent peep that allows the contents in the hollow container to be confirmed from the outside by forming a part of the body wall of the hollow container formed of the thermoplastic synthetic resin with a transparent film made of the thermoplastic synthetic resin. A transparent container with a window having a window formed therein. 2. The transparent film according to claim 1, wherein the transparent film is formed by a part of an adhered body such as a label adhered to an outer peripheral surface of a body wall of a hollow container. A container with a window. 3. A core of an inner mold is provided at a tip portion of a pressing rod slidably provided on the outer mold, which is a part of a transparent resin film mounted in the injection mold and fixed to the outer mold surface. After being pressed against the surface, the thermoplastic synthetic resin melted by an injection molding machine is injected into the cavity to form a hollow container of a predetermined shape, and at the same time, the resin film is in-molded to form a hollow container wall. A method for forming a transparent container with a window, characterized in that a transparent window portion is formed in the portion so that the contents can be confirmed. 4. A transparent portion provided on a sticking body made of a resin film such as a label, which is mounted in an injection molding die and fixed in a cylindrical shape on the outer die surface, is slidable on the outer die. After pressing against the inner core surface with the tip of the provided pressing rod,
A thermoplastic synthetic resin melted by an injection molding machine is injected into a cavity to form a hollow container having a predetermined shape, and at the same time, the resin film is in-molded to be integrated, and is attached to the body wall of the container. A method for forming a transparent container with a window, which comprises forming a transparent window portion capable of confirming the contents.