JPH04336237A - Container fitted with hanger and manufacture thereof - Google Patents

Abstract

PURPOSE:To manufacture a container provided with a hanger simultaneously with blow molding and to certainly hold the hanger to the container. CONSTITUTION:A preformed product 1 having a protruding part 3 provided to the bottom part thereof is subjected to pre-blowing in a temp. control mold 31 to be stretched to form an intermediate molded product 19 which is, in turn, arranged in a main blow mold 40. A protruding part 14 is provided to the upper edge of the side wall 13 of the tray-shaped hanger 7 mounted on a bottom mold 42 and a fitting hole 9 and a hanging piece 10 are provided to the bottom pate 8 of the hanger 7. The protruding part 3 is fitted in the fitting hole 9 of the hanger 7 thus constituted to be fastened thereto and the intermediate molded product 19 is subjected to blow molding to engage the protruding part 14 of the hanger 7 with the recessed part 25 formed to the body part of a container 23 to form the container fitted with the hanger.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container with a hanger used for infusions, etc., and a method for manufacturing the same.

0002

BACKGROUND OF THE INVENTION Conventionally, Japanese Patent Application Laid-open No. 61-287728 discloses a method for manufacturing a container with a hanger used for infusions and the like.

[0003] The manufacturing method described in the above publication first involves the following steps:
A bag-shaped container with a flat bottom is formed by blow molding, and then this bag-shaped container is taken out from the mold. Next, a new bottom is provided at the bottom of this bag-like container, and
This is a method for manufacturing a bag-like container in which a hanging hole is provided below the bottom to form a hanging piece.

0004

[Problems to be Solved by the Invention] In the conventional container manufacturing method described above, after forming the container by blow molding, a bottom part and a hanging piece are newly formed, which increases the number of manufacturing steps and increases costs. This is the way to do it.

The present invention has been developed in view of the above-mentioned matters, and is a method for manufacturing a container in which a hanger is provided at the same time as blow molding, and the hanger attached to the container is securely held in the container. The technical challenge is to form it in such a way.

[0006]

[Means for Solving the Problems] In the invention of a container with a hanging device, a protruding portion 3 is provided on the lower surface of the bottom of a synthetic resin container 23 integrally with the bottom portion, and a dish-shaped hanging device is provided on the bottom portion. 7 is fitted externally into the fitting hole 9 provided in the bottom plate 8 of the hanging tool 7,
The protruding part 3 of the container 23 is fitted, and the tip thereof becomes the enlarged part 2.
A protrusion 14 is formed on the upper edge of the side wall portion 13 of the hanger 7 and is engaged with a recess 25 formed in the body of the container 23. However, a hanging piece 10 was integrally provided on the lower surface of the bottom plate 8 of the hanging tool 7 to form a container with a hanging tool.

[0007] Furthermore, the invention of the method for manufacturing a container with a hanger has a length of 3 mm to 10 mm on the bottom part 2 of the preformed product 1.
Preferably 5 mm to 7 mm, outer diameter 2 mm to 5 mm,
A preformed product 1 made of synthetic resin is preferably provided with a protrusion 3 of 3 mm, and this preformed product 1 is placed in a temperature adjustment mold 3.
1, the pre-blown intermediate molded product 19 is placed in a main blow mold 40, formed as a split mold, and placed in a dish-shaped bottom mold 42 that is movable up and down. A hanging tool 7 in which a protrusion 14 is formed on the upper edge of the side wall part 13, a fitting hole 9 is formed in the bottom plate 8, and a hanging piece 10 is integrally provided on the lower surface of the bottom plate 8. 7, the protruding part 3 of the intermediate molded product 19 is fitted into the fitting hole 9 of the hanging tool 7, and the tip of the protruding part 3 is pressed with the bottom mold 42 to form the enlarged part 26. The method for manufacturing a container with a hanger includes forming the intermediate molded product 19, and blow-molding and stretching the intermediate molded product 19.

[0008]

[Operation] In the container 23 of the present invention, the protruding portion 3 provided at the bottom fits into the fitting hole 9 provided in the bottom plate 8 of the hanging device 7 and is fixed to the side wall portion 13 of the hanging device 7. The formed protrusion 14
engages with the recess 25 formed in the body of the container 23,
The container 23 is securely held on the hanger 7.

[0009]

[Embodiment] An embodiment of the method for manufacturing a container with a hanger according to the present invention and a container with a hanger manufactured by the method will be described with reference to FIGS. 1 to 7.

[0010] In this example, MFR 0.5g/10
Using an injection stretch blow molding machine ASB-250, a polypropylene homopolymer of min.
, is a molded container with a hanging device having an internal capacity of 1100 ml.

The blow molding molds used in this embodiment are a temperature adjustment mold 31 and a main blow molding mold 40.

The temperature adjustment mold 31 is shown in FIGS. 1 and 2, and is formed as a split mold and includes an upper mold 32 that can be opened and closed, a body mold 33 formed in a cylindrical shape, and an upper and lower mold. It consists of a movable bottom mold 34, and the bottom mold 34 is provided with a recess 35.

[0013] The bottom mold 34 can be formed in a fixed manner or can be formed integrally with the body mold 33.

The upper mold 32 corresponds to the shoulder of the intermediate molded product 19 to be molded, the body mold 33 corresponds to the trunk of the intermediate molded product 19, and the bottom mold 34 corresponds to the shoulder of the intermediate molded product 19 to be molded. This corresponds to the bottom of the .

The main blow molding mold 40 is shown in FIGS. 3 and 5, and is composed of a body mold 41 formed as a split mold and a bottom mold 42 that is movable up and down.

The bottom mold 42 includes a hanging tool fitting mold 43 which can be opened and closed in the horizontal direction and can also be moved up and down.
A pressing mold 44 is provided which can press a descending suspender fitting mold 43 with a tapered surface 45 formed inside.

Although the pressing mold 44 is of a fixed type, it may be formed so that it can move up and down.

[0018] For molding, first, the injection temperature of the resin was 220°C,
At a mold temperature of 20℃, a length of 5m is placed at the bottom, as shown in Figure 7.
A preformed product 1 was formed with a protrusion 3 having an outer diameter of 3 mm.

Next, with the mouth part of the preformed product 1 being held between neck molds (not shown), a temperature adjustment mold 3 is inserted.
It is placed in the temperature adjustment mold 31 with the upper mold 32 of No. 1 opened and the bottom mold 34 lowered, as shown in FIG.

Next, the upper mold 32 is closed and clamped, the bottom mold 34 is raised and brought into contact with the body mold 33, and the protrusion 3 of the preform 1 is inserted into the recess 35 of the bottom mold 34. be placed inside.

[0021] Blow gas is then blown into the preformed product 1 to perform preliminary blowing. Then, as shown in FIG. 2, the preformed product 1 is stretched and formed into an intermediate molded product 19.

[0022] The stretching ratio of the preliminary blow is 1.0 times in the vertical direction, 1.2 times in the horizontal direction, and the preliminary blow air pressure is 5 kg/
cm2, and the temperature of the temperature control mold 31 was 140°C.

Next, the upper mold 32 is opened, the bottom mold 34 is lowered, and the intermediate molded product 19 is taken out from the temperature adjustment mold 31.

Next, the intermediate molded product 19 is placed in the main blow molding die 40. Then, the bottom plate 8 of the dish-shaped hanger 7 made of polypropylene homopolymer is placed on the hanger fitting mold 43 of the bottom mold 42, and the hanging piece 10 provided on the lower surface of the bottom plate 8 is the hanging tool fitting alloy mold 43;
Insert it hanging down between 43.

[0025] At the center of the bottom plate 8 of the hanging tool 7, there is a mark shown in FIG.
As shown in FIG. 4, a fitting hole 9 into which the protrusion 3 of the intermediate molded product 19 fits is provided, and the protrusion 3 is inserted into a hanging piece 10 provided on the lower surface of the bottom plate 8. A substantially semicircular cavity 11 is formed, and a hanging hole 12 is provided at the tip.

A protrusion 14 that protrudes inward in an annular shape is formed on the upper edge of the side wall portion 13 forming the dish-shaped portion of the hanger 7.

The hanging tool fitting mold 43 on which the hanging tool 7 is placed as described above is raised, and the protrusion 3 of the intermediate molded product 19 is inserted into the fitting hole 9 formed in the bottom plate 8 of the hanging tool 7. insert. FIG. 3 shows this state as seen from the front, and FIG. 4 shows the relationship between the intermediate molded product 19 and the hanging tool 7 in the above state as seen from the side.

Then, the main blow molding mold 40 is clamped, and the bottom of the intermediate molded product 19 is pushed down with the stretching rod 50 to stretch it in the vertical direction, and blow gas is blown into the intermediate molded product 19 to stretch it in the horizontal direction. let

At the same time, the hanger fitting mold 43 inserted into the pressing mold 44 is pressed by the tapered surface 45 of the pressing mold 44, pressing the protrusion 3 and expanding the enlarged part 2.
6, and the hanging tool 7 is attached to the container 2 as shown in FIG.
It is fixed to the bottom of 3.

The main blow stretching ratio of the main blow molding die 40 was 1.6 times in the vertical direction and 3.3 times in the horizontal direction.

The obtained container is shown in FIG.
Polypropylene container with hanging device 23 weighing 40g
It is.

Since the material of the container 23 in this embodiment is polypropylene homopolymer, it does not contain highly leachable components such as plasticizers, is highly safe as an infusion container, and has heat resistance that can withstand high-pressure steam sterilization. It is something.

[0033]

[Effects of the Invention] In the container with a hanging device of the present invention, the protruding portion provided at the bottom of the container is fixed to the hanging device, and the protruding portion provided on the hanging device is engaged with the recessed portion of the body of the container. This ensures that the container is held securely in the hanger. In addition, it is possible to create a hanger that is suitable for the function without being influenced by the shape of the container.

Furthermore, the method for manufacturing a container with a hanging device of the present invention reliably attaches the hanging device to the bottom of the container at the same time as the container is blow-molded. can be manufactured and the cost can be reduced.

[Brief explanation of the drawing]

FIG. 1 shows the manufacturing process of an embodiment of the present invention, and is a cross-sectional view of a preformed product placed in a temperature-controlled mold.

FIG. 2 is a cross-sectional view of a pre-molded product in a pre-blown state in the manufacturing process of an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the manufacturing process according to an embodiment of the present invention, when the intermediate product is placed in the main blow molding die, as seen from the front.

[Figure 4] Cross-sectional view of the intermediate molded product and hanging tool in Figure 3, viewed from the side

[Fig. 5] Cross-sectional view of the intermediate molded product in Fig. 3 after blow molding

FIG. 6 is a sectional view of a container with a hanger according to an embodiment of the present invention.

[
FIG. 7: Cross-sectional view of a preformed product according to an embodiment of the present invention

[Explanation of symbols]

1 Preformed product 3.Protruding part 7 Hanging equipment 8 Bottom plate 9 Fitting hole 10 Hanging piece 13 Side wall part 14 Protrusion 19 Intermediate molded product 23 Container 25 Recess 26 Enlarged section 31 Temperature adjustment mold 40 Main blow mold 42 Bottom mold

Claims (2)

[Claims] Claim 1: A protruding portion is provided on the lower surface of the bottom of a container made of synthetic resin and is integral with the bottom, and a dish-shaped hanging device is fitted onto the bottom portion, and a protruding portion is provided on the bottom surface of the container made of synthetic resin. In the matching hole,
The protruding part of the container is fitted and the tip is formed into an enlarged part and fixed, and the upper edge of the side wall of the hanger is formed with a protruding part that protrudes inward, and the body of the container is fixed. A container with a hanger that engages with a recess formed in the hanger and has a hanging piece integrally provided on the lower surface of the bottom plate of the hanger. [Claim 2] A preformed product made of synthetic resin with a protrusion on the bottom is formed, and this preformed product is heated in a temperature-controlled mold.
After pre-blowing and stretching, the pre-blown intermediate molded product is placed in a main blow mold, formed as a split mold, and placed in a bottom mold that is movable up and down with a dish-shaped hanging tool. A protrusion is formed on the upper edge of the side wall portion, a fitting hole is formed on the bottom plate, and a hanging tool integrally provided with a hanging piece is placed on the lower surface of the bottom plate to prevent the protrusion of the intermediate molded product. Department,
A method for producing a container with a hanger, which is fitted into a fitting hole of the hanger, presses the tip of the protrusion with a bottom mold to form an enlarged part, and blow-moldes and stretches the intermediate molded product. .