JPH0617140B2 - Method of manufacturing container with hanging device - Google Patents

Description

The present invention relates to a method for manufacturing a container with a hanging tool. More specifically, the present invention relates to a method of producing a container having a suspending device provided at the bottom of the container, for example, a suitable container to be used when a Ringer's solution or the like is infused into a patient in a hospital or the like.

[Conventional technology]

As a container for infusion used in a hospital or the like, a glass bottle, a synthetic resin bottle, a synthetic resin bag-like body or the like is usually used, but it is constructed to be hung above a patient for its use.

In the case of glass bottles and synthetic resin bottles, a belt-shaped hanger is usually made separately and then hung using this, which makes it difficult to attach the hanger and is inconvenient to handle. It was a thing.

[Object of the Invention]

An object of the present invention is to provide a method for manufacturing a container in which a hanger is integrated so as to avoid the above-mentioned trouble.

[Structure of Invention]

The gist of the present invention comprises a container formed by blow molding a bottomed parison made of a thermoplastic synthetic resin and provided with a protrusion on the bottom surface, and a hanger fixed to the bottom of the container. Is a bar-shaped fixing member extending from the vicinity of the protruding portion of the container toward the edge of the container bottom, and an arc-shaped hanging portion connecting the vicinity of both ends of the fixing member integrally formed from a flexible material. The fixing member has an opening at a position corresponding to the protruding portion of the container of the fixing member. The protruding portion of the container is fitted into the opening, and the tip of the protruding portion is melted and crushed to fix the fixing member. In the method for producing a container with a hanging tool, the fixed portion having a diameter larger than the inner diameter of the opening is formed.

Hereinafter, an example of the method of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a container obtained by the method of the present invention, FIG. 2 is a partially cutaway perspective view showing the usage state of the container shown in FIG. 1, and FIG. 3 is a bottomed parison. FIG. 4 is a side view showing an example, FIG. 4 is a longitudinal sectional view showing a state where the bottomed parison shown in FIG. 3 is blow-molded, and FIG. 5 is an enlarged view of a lower portion of FIG. FIG. 5 is a drawing similar to FIG. 5, showing a state in which the protrusion is heated and pressed to be crushed.

In the figure, 1 is a container, 2 is a suspender, 3 is a fixed part, 4 is a bottomed parison, 5 is a protrusion, 6 and 6'are molds, 7 is a protruding pin,
Reference numeral 8 indicates a pressing head, and 9 indicates a heating pressing pin.

As shown in FIGS. 1 and 2, the manufacturing method of the present invention is applied to a container 1
To produce a container with a hanger in which the hanger 2 is fixed to the bottom of the hanger with a fixing part 3.

As the material forming the container 1, any thermoplastic synthetic resin that can be used in a molding method using a bottomed parison such as a biaxial stretching blow method and an injection blow molding method described later may be used.
For example polypropylene, high density, low density, linear low density,
Representative examples include polyethylene, vinyl chloride resin, polyethylene terephthalate, and the like.

First, a bottomed parison (test tube-shaped preform) 4 having a protrusion 5 at the bottom end as shown in FIG. 3 is prepared. The bottomed parison 4 is usually molded by injection molding, but in some cases, a tubular body is obtained by extrusion molding or the like, and one end of the tubular body is processed and closed under heating to close the parison 4. It may be set to 4. It is necessary that the bottom end of the bottomed parison 4 has a protrusion 5 formed thereon. The protrusion 5 can be easily formed by molding so as to leave a spray portion when the bottomed parison 4 is injection molded. The size of the protrusion 5 depends on the size of the hanging tool to be attached and the required strength, but when obtaining a container having an internal capacity of about 0.1 to 1, it may be about 2 to 4 mmφ. The height may be about 8 to 15 mm. The shape of the protrusion 5 is not particularly limited, but a truncated cone shape is preferable as shown in FIG. 3 in relation to the subsequent steps.

Explaining the case where the molding is performed by the biaxial stretch blow molding method, the bottomed parison 4 is first temperature-controlled to a desired stretching temperature below the melting point and introduced into the molds 6 and 6 '.

The bottomed parison 4 introduced into the molds 6 and 6'is longitudinally stretched by the ejecting pin 7 and is blown laterally by the air blown from the air introduction hole passing through the inside of the ejecting pin 7 to form a bottle shape. It is used as a container.

At this time, the projection 6 provided at the tip of the bottomed parison 4 comes into contact with the bottoms of the molds 6 and 6'to prevent the mold 6 from being crushed.
The bottom of 6'is provided with an opening sufficient for the projection 5 to enter. That is, the container 1 having the protrusion 5 is formed.

The drawing shown in FIG. 4 is an apparatus for efficiently forming the container 1 and attaching the suspending tool 2, and the suspending tool 2 is previously mounted in the molds 6 and 6 '. It is preferable that the hanging tool 2 includes a fixing member having an opening at a position corresponding to the protruding portion 5, and a hanging portion connected to the fixing member and having a string-like body conforming to the bottom shape of the container. The material may be a flexible material such that polypropylene can be easily pulled up by the finger, such as polypropylene or polyethylene. Since such a suspending tool 2 is preliminarily attached to the mold, the projecting portion 5 of the container 1 can be inserted into an opening provided in the central portion of the suspending tool 2 and having a thickness substantially matching that of the projecting portion 5. Become. Then, the pressing pin in a heated state provided under the molds 6 and 6'is raised to crush the projecting portion 5 while melting it to form the fixed portion 3. This step is shown in FIGS. 5 and 6.

In this case, it is preferable to support it by the pressing head 8 at the tip of the protrusion pin 7.

In this way, the container 1 to which the suspending tool 2 is fixed is prepared, but the suspending tool 2 is not mounted in the mold as described above, but the container 1 having the protrusion 5 is first prepared, and then the container 1 is prepared. Of course, the suspending tool 2 may be attached in the process.

Further, although the above description was based on the biaxial stretch blow molding method,
After the parison is injection-molded, the hanger may be integrally attached by a so-called injection blow-molding method in which the parison is introduced into a blow-molding die before it is cooled and solidified to perform blow-molding. In this case, if the protrusions 5 are still in a molten state, the heating pressing pin 9 may not need to be heated.

In this way, the container 1 with the hanging device 2 is manufactured, but by making the hanging device 2 into a shape corresponding to the bottom shape of the container 1 as shown in FIG. 1, there is no hindrance when placing the container,
The crushed portion of the protrusion 5 is crushed to a position flush with the suspending tool 2 or a position lower than that as shown in FIGS. 4 and 5, so that the container 1 becomes unstable when the container is placed. There is nothing to do. Further, by denting the center of the bottom of the container from the peripheral edge and accommodating the hanging tool, the hanging tool can be provided at a position where it does not protrude from the bottom of the container.

[Effects of the Invention] According to the method of the present invention, it is possible to stably and efficiently manufacture a container provided with a hanging tool at the bottom, and obtain a container suitable for use as a medical infusion container or the like. Of course, this container can be used for various other purposes.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a container obtained by the method of the present invention, FIG. 2 is a partially cutaway perspective view showing the usage state of the container shown in FIG. 1, and FIG. 3 is a bottomed parison. FIG. 4 is a side view showing an example, FIG. 4 is a longitudinal sectional view showing a state where the bottomed parison shown in FIG. 3 is blow-molded, and FIG. 5 is an enlarged view of a lower portion of FIG. FIG. 5 is a drawing similar to FIG. 5, showing a state in which the protrusion is heated and pressed to be crushed. In the figure, 1 is a container, 2 is a hanger, 3 is a fixture, 4 is a parison with a bottom, 5 is a protrusion, 6, 6'is a mold, 7 is a protruding pin,
Reference numeral 8 indicates a pressing head, and 9 indicates a heating pressing pin.

Claims (1)

[Claims] 1. A container, which is formed by blow molding a bottomed parison made of a thermoplastic synthetic resin and has a protrusion on the bottom surface, and a suspender fixed to the bottom of the container. A rod-shaped fixing member extending from the vicinity of the protruding portion of the container toward the edge of the container bottom, and an arc-shaped hanging portion connecting the vicinity of both ends of the fixing member are integrally formed from a flexible material. The fixing member has an opening at a position corresponding to the protruding portion of the container, the protruding portion of the container is fitted into the opening, and the tip portion of the protruding portion is melted and crushed to fix the fixing member. A method for manufacturing a container with a hanging tool, which comprises forming a fixed part having a diameter larger than the inner diameter of an opening.