KR20030000060A - manufacturing method plastic container on which concave groove in formed - Google Patents

Abstract

PURPOSE: A method for fabricating a synthetic resin vessel is provided to improve the convenience of use by allowing the synthetic resin vessel to be easily gripped by a user through forming a protruding part or convex flank part in the synthetic resin vessel. CONSTITUTION: A lid(1), a cylindrical body(4) having a protruding part(3) formed by a convex flank part(2), and a lower bottom plate(5) are separately formed through an injection molding process. A protrusion(6) formed at a lower portion of the cylindrical body(4) is coupled with a convex part(7) formed at an upper portion of the lower bottom plate(5). Then, the cylindrical body(4) coupled with the lower bottom plate(5) is thermally bonded to each other through an ultrasonic bonding device, thereby forming a synthetic resin vessel having a larger upper portion and a narrow lower portion.

Description

Manufacturing method of plastic container on which concave deposit is formed

The present invention relates to a method for manufacturing a synthetic resin container for storing food, etc. More specifically, a groove having a groove formed on the inner circumferential surface and a wider lower portion than the upper portion is easily formed by an injection molding process and an ultrasonic welding process. Since it can be manufactured, it is possible to provide a container of a variety of shapes from the conventional uniform shape, as well as to easily prepare a container of a variety of shapes without going through the complicated process used to implement a special shape of the container. .

Containers for storing or removing foodstuffs are usually formed with an opening and closing lid on the upper part of the housing, and the housing and the lid are generally molded using synthetic resin materials for the purpose of realizing various colors and mass production. to be.

Such a synthetic resin container is light and durable, it is convenient to use, but its service life is very long.

In addition, since the body of the synthetic resin container described above forms a bottom surface and has an open shape to the upper side, a mold mold positioned inside the body during molding by the injection mold has a certain amount so as to facilitate separation from the molding. Since a gradient (taper) is applied to the mold frame, the injection molded product is formed of a container in the upper and lower narrowing states in which the upper opening is wider than the lower bottom surface.

The container of such a shape is fixed in an immutable shape due to the nature of the injection mold, and it is impossible to implement any configuration and shape that interferes with the injection molding, such as a groove or a protrusion, and the color of the entire container as a part of the outer surface of the container. Because it is not possible to express different colors differently from the color film such as transfer paper, the aesthetics of the container was enhanced.

In addition, a protrusion is formed on the inner circumferential surface, openings are formed on both sides, and a container body having different gradients is formed on the opening side to remove the uniformly shaped container, and then a separate bottom plate is screwed on one opening. By combining the body to form a more diverse shape of the container was able to manufacture, but because the body and the bottom plate by screw coupling, the contents flow into the coupling portion to cause corruption or contaminate the contents, when storing the liquid There is a problem that can not be used because of the water tightness.

In addition, since the screw parts corresponding to each other must be formed by injection molding, the manufacturing cost of the mold is increased and moldability is deteriorated.

The present invention has been devised to eliminate the problems as described above, and injection molding by separating the body and the bottom plate, respectively, after forming a protrusion and groove groove corresponding to the bottom of the body and the top of the bottom plate to combine them By heat welding the body and bottom plate by ultrasonic welding machine,

The container body of the upper and lower beam deposits and the protrusions formed on the inside of the container body and the grooves of the outer circumferential surface provide stability as containers, and the grip force is improved by the protrusions or grooves and is more convenient to use, regardless of the conventional uniform shape. It is an object of the present invention to provide a method for manufacturing a phase-bending optical deposit synthetic resin container formed with grooves having an effect.

In addition, it is an object of the present invention to partially express the overall color of the container and various other colors on the outer surface of the container to provide a two-tone mixed color without a separate color film, such as transfer paper to further enhance the aesthetics have.

1 is an overall perspective view of a container completed by the manufacturing method of the present invention

Figure 2 is a side cross-sectional view of the container completed by the manufacturing method of the present invention

Figure 3a and 3e is a detailed view of each of the production method according to the present invention,

Figure 3a is an exploded cross-sectional view of each injection molded container part

Figure 3b is a process diagram for injection molding the body formed with a protrusion therein by the mold frame

Figure 3c is a process of ultrasonic welding the body and the bottom plate

Figure 3d is an enlarged cross-sectional view showing a state before welding of the body and the bottom plate

Figure 3e is an enlarged cross-sectional view showing a state after welding of the body and the bottom plate.

Explanation of symbols on the main parts of the drawings

1: lid 2: groove groove

3: protrusion protrusion 4: body

5: bottom plate 6: protrusion

7: groove groove 8: ultrasonic welding machine

10,10: inner mold 11: ultrasonic horn

Hereinafter, preferred embodiments of the present invention will be described.

1 is a perspective view of a container in a state completed by the present invention, Figure 2 is a side cross-sectional view thereof.

An individual molding process of separately injecting the tubular body 4 and the lower bottom plate 5 each having an inner protrusion 3 formed by the lid 1 and the recess 2 of the outer circumferential surface;

A coupling process of correspondingly coupling the protrusions 6 of the lower part of the body 4 and the grooves 7 of the upper part of the bottom plate 5 to each other;

The upper and lower synthetic resin container is completed by the ultrasonic welding process of pressing the body 4 and the bottom plate 5 up and down by the ultrasonic welding machine 8 and thermally welding them.

In the figure, reference numeral 10, 10 'is an inner mold, 11 is an ultrasonic horn.

The manufacturing method of the container of this invention as mentioned above is demonstrated in more detail by the manufacturing process as follows.

First, the synthetic resin container completed by the present invention has a side cross-sectional state of the upper and lower beams of the lower side wider than the upper side as shown in Figure 2 is excellent in stability and stable in case of being impacted by people or objects It is excellent and the fear that the contents of the inside spilled over or fall over the conventional container is reduced.

Such a container is injection-molded by a mold that matches each shape as shown in FIG. 3A, and in particular the tubular body 4 is moved as shown in FIG. 3B to impart a variety of gripping forces or shapes of the container. It is prepared separately by the individual molding process, the grooved tank 2 of the outer peripheral surface and the protrusion tank 3 of the inner peripheral surface are formed by the inner mold 10, 10 'sliding on the rear side.

In this individual injection process, the body 4 is not molded by a single mold, but the inner mold 10 and 10 'which are slid before and after to form a parting line at the center of the protrusion. It is possible to form a container body 4 having a taper formed on both sides from the parting line, or to arbitrarily shape a container having an asymmetric shape by a larger taper on one side, thereby avoiding the conventional uniform container shape.

The body 4 and the bottom plate 5 of the lid 1, the body 4, and the bottom plate 5, which are each injection molded in this way, have a function as a container only when they are combined with each other. 4) the protrusions 6 on one side and the grooves 7 in the upper part of the bottom plate 5 corresponding to the protrusions 6 are joined to each other by a joining process,

After the combined body 4 and the bottom plate 5 are placed in the ultrasonic welder 8 as shown in Figs. 3c and 3d, the container body 4 or the bottom plate 5 by the ultrasonic horn 11 Since the high heat is generated in the protrusions 6 and the grooves 7 by the ultrasonic pressure, thereby undergoing a process for thermal welding by melting of the protrusions 6 as shown in Figure 3e. will be.

Since the body 4 and the bottom plate 5 attached by the ultrasonic welding process are not combined by screwing as in the related art, the watertightness is greatly improved, and the same effect as that of a single body is such that damage and cracking are dangerous. It is also significantly reduced.

In addition, since the body 4 and the bottom plate 5 are separated and thermally welded to each other, the color of the body 4 and the bottom plate 5 may be different from each other to provide a container body of various colors.

That is, the body (4) of the container is molded in a transparent color to enable the perspective of the internal contents to enable the identification of the contents even without opening the lid (1), while the lower bottom plate (5) uses a colored resin It is molded to meet the needs of consumers by various color combinations while making it relatively less visible that a lot of scratches are generated by frequent use.

The container completed by this work process has the shape of upper and lower deposits, so it is more stable in use and has excellent airtightness with the body and the bottom plate, so there is no fear of the contents flowing into the gap or outflow. And because the color of the bottom plate is different from each other it will be able to satisfy a more various purchase tendencies.

The manufacturing method of the upper and lower beam deposit synthetic resin container formed in the groove groove of the present invention as described above, the container body of the upper and lower beam deposits give a sense of stability when using, and the gripping force is improved by the projection and the groove of the outer peripheral surface formed in the interior of the container body is used This will be more convenient, and because it is not limited to the conventional uniform shape, there is an effect that can satisfy a variety of purchasing tendencies.

Claims (2)

An individual molding process of separately injecting the tubular body 4 and the lower bottom plate 5 each having an inner protrusion 3 formed by the lid 1 and the recess 2 of the outer circumferential surface; A coupling process of correspondingly coupling the protrusions 6 of the lower part of the body 4 and the grooves 7 of the upper part of the bottom plate 5 to each other; Upper and lower grooves formed with grooved grooves characterized in that the synthetic resin container of the upper and lower beams is completed by an ultrasonic welding process in which the combined body 4 and the bottom plate 5 are pressed up and down by an ultrasonic welding machine 8 to be thermally welded. Method for producing a mineral deposit resin container. The method according to claim 1, wherein in manufacturing the individually molded body and the bottom plate into a single body through an ultrasonic fusion process, the color of the body 4 and the bottom plate 5 are manufactured in different colors, so A method for manufacturing a top and bottom bottom deposit synthetic resin container having a grooved groove, characterized in that the collar is expressed locally.