JPS60228236A - Hollow vessel - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to hollow containers molded by the pull molding method, such as food containers and pharmaceutical containers.

Prior Art The above-mentioned hollow containers are equipped with a probe to prevent foreign matter such as dust from entering the hollow containers during transportation or storage, or to prevent deformation or damage to the original three-dimensional shape of the hollow containers. It is sealed immediately after molding.

For example, in the case of a food container, the part near the mouth of the container where the pressure fluid is introduced is closed by heat welding after plastic molding, and then the closed part is cut open when filling the container with the contents. The contents are filled from the beginning to prevent bacteria from entering the contents.

FIG. 10 shows the conventionally known hollow container mentioned above (Japanese Patent Application Laid-Open No. 48-23851), in which when the container body α is molded, a bulge unrelated to the product is formed at the mouth of the container body α. C
is provided protrudingly, and a pressure fluid blowing pipe d is provided in this bulging portion C.
A blowing needle is inserted into this pressure fluid blowing pipe d to perform blow molding, and then the heat sealing portion e of the pressure fluid blowing pipe d is heat-sealed with a heating blade or the like. When filling the contents, the bulging portion C is cut out along the cutting line f at the end of the mouth portion to open the mouth f'Ab.

In the above-mentioned conventional hollow container, since the fluid blowing pipe d and the heat sealing part e protrude from the mouth part, when the containers come into contact with each other during transportation, this protruding part connects the body of the container. There was a problem that the surface of the product would be damaged.

In addition, in the above conventional example, the seal part is a thin tubular part, and the heat seal uses two hot plates, which sandwich and seal the heat seal part. It is extremely important to properly adjust the heating temperature, time, and pressing force during heat sealing, and the heat seal part e is thin and easily cut, and the cut thin tubular part easily sticks to the heat seal part e. As a result, there have been problems such as accidents in which the contents get mixed into the container when filling the container, and furthermore, the heat-sealed closure part opens unexpectedly and the inside of the container is contaminated.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems.The present invention has been made in view of the above-mentioned problems. It is an object of the present invention to provide a hollow container that can be easily melted and closed from one direction using a separate heating element without deforming the bulging portion.

Constituent of the Invention A hollow container in which a hollow bulging part that closes the mouth part is integrally molded on the mouth part of the container main body, and a blow hole is provided in the bulging part, and a cutout part is provided in the bulging part, A cylindrical portion is provided on one side wall of the notch, and a blow hole is opened at the top of the cylindrical portion, which is melted and closed by heating and pressing the top of the cylindrical portion after molding.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 to 9.

In the figure, 1 is a hollow container usually molded by a general blow molding method, 2 is the container body, 3 is a mouth part, and a bulge part 4 that is cut out when filling the contents is integrally molded into the mouth part 3. has been done.

A blow hole 5, which is a passage through which pressure fluid is introduced during blow molding, is opened at the top of the bulging portion 4, and the blow molding is performed by allowing pressure fluid to flow through the blow hole 5 during molding. ing.

The top of the bulging portion 4 is shaped like a 1,000-yen sphere with a portion thereof cut out, and a semi-cylindrical bulging tube portion 6 is provided on one side wall of the notch 4α. The above-mentioned blow hole 5 is opened at the top.

The blow hole 5 of the hollow container 1 which is blow-molded into the above-mentioned shape is located at the side notch 4 of the bulge 4 as shown in FIGS. 3 and 4.
By approaching the hot plate 7 from the α side and pressing the top of the cylindrical portion 6 toward the bulging portion 4 side, the cylindrical portion 6 is closed by melting and deforming.

At this time, the reaction force against the compression of the hot plate 7 is supported by the bulging portion 4, and the cylindrical portion 6 for closing the blow hole 5 is pressed with a force sufficient to melt and deform.

The shape of the cylindrical portion 6 provided in the bulging portion 4 may be a tapered shape as shown in FIG. 2, or a right cylindrical shape as shown in FIG. 5. On the other hand, the notch 1 4a provided in the bulging portion 4 may be small as shown in FIG. 6, or may be cut out from both sides of the bulging portion 4 as shown in FIG. Part 4
It is also possible to have a shape in which a portion sufficient to withstand the suppression by the hot plate 7 is left, and other portions are cut out. In particular, when the cylindrical portion 6 is approximately semi-cylindrical, the portion that melts and deforms and the portion that withstands pressure are effectively arranged in halves, so that complete closure can be achieved.

Further, the blowing hole 5 does not necessarily have to be opened at the top surface of the bulge 40, but may be opened at the side surface of the bulge 4 as shown in FIG.

Further, the top of the bulging portion 4 does not necessarily have to be semicircular and may have a shape that does not have very sharp edges, such as a rectangular cylinder. In particular, if the top of the cylindrical portion 6 is placed inward from the bulging portion 4, the molten top of the cylindrical portion 6 will not damage other containers, and the cylindrical portion 6 will not separate.

As a heating means for melting and deforming the top of the cylindrical part 6, an example other than the hot plate 7 shown in FIGS. 3 and 4 is to heat the top of the cylindrical part 6 with hot air or flame and then use a cooling plate. There is a means for applying pressure.

Effects of the Invention According to the present invention, since the top of the cylindrical part 6 is closed, there is no cylindrical part above the closed part, and therefore, the part above the closed part is separated during transportation as in the conventional case. Never. Furthermore, since the blow hole 5 is provided along the bulging portion 4, the blocked portion of the blow hole 5 does not protrude, and this portion does not damage other containers. Furthermore, since the closing portion is melted and deformed relative to the bulging portion 4, the closing portion is completely closed, and the closing portion does not open unexpectedly and the inside of the container is not contaminated. The blow hole 5 can be easily closed off from one direction by a heating element, and can be melted and closed without deforming the bulged portion 4.

[Brief explanation of the drawing]

1 to 9 show embodiments of the present invention.
The figure is a front view with the main part cut away, Fig. 2 is a perspective view of the main part, Figs. 3 and 4 are action explanatory views, and Figs. 5 to 9 are perspective views showing the other side of the main part. 10 are front views showing a conventional example. 1 is a hollow container, 2 is a container body, 3 is a mouth part, 4 is a bulging part,
4α is a notch, 5 is a blow hole, and 6 is a cylindrical portion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Scope of Claims] (1) A hollow container 1 in which a hollow bulging portion 4 that closes the mouth portion 3 is integrally molded on the mouth m3 of the container body 2, and a blowing hole 5 is provided in the bulging portion 4. In the above-mentioned bulging part 4, a notch 4α is formed.
A cylindrical part 6 is integrally arranged in parallel with one side wall of the notch 4α, and a blow hole 5 is opened at the top of the cylindrical part 6 to close the top of the cylindrical part 6 after molding. A hollow container. (2) The hollow container according to claim 1, wherein the top of the bulging portion 4 is semicircular. (3) The hollow container according to claim 1 or 2, characterized in that the blowing hole 5 is provided at the top of the bulging portion 4. (4) The cylindrical portion 6 is approximately semi-cylindrical. A hollow container according to any one of claims 1 to 3, characterized in that the container has a certain opening. A hollow container according to any one of claims 1 to 4.