JPS63125144A - Synthetic resin vessel and mold for manufacture thereof - 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 a drum-type container blow-molded from a thermoplastic synthetic resin and a mold for manufacturing the container.

[Conventional technology]

Such a synthetic resin container is disclosed in British Patent No. 1.575.
．． 674, U.S. Patent No. 3,050,773, and Japanese Patent Publication No. 57-5730 and Japanese Patent Publication No. 57-33215, a handling chime (output) is installed in the circumferential direction of the fuselage wall. It has a rim).

Figure 10 shows an example. In the figure, 3 is the fuselage wall, 7
is a tap stopper, and a handling chime 1.degree. 2 is integrally molded to protrude in the circumferential direction of the body wall 3 at a position slightly further back from the upper and lower ends of the container.

The upper end handling chime 1 has a flange 1
The lower end handling chime 2 has a cross section with a flange 2a facing downward, and the groove 4 opens outward.

This handling chime 1.2 becomes the engagement part of the grip when transporting the container, and in order to lift the container in an upright state as shown in FIG. The handle chime 1 is suspended at two points via a wire 6 by a grip 5 having a claw that engages in the groove 4 on the lower side and the upper side. Engage with both handling chimes 1 and 2 and hang the wire.

By the way, the L-shaped cross-sectional shape of the handling chime 1.2 is determined by the relationship between the molds during blow molding, and as shown in FIGS. 12 and 13, the upper mold 8 and the lower mold 9 The parison 10 that enters the gap is pressed by the upper and lower molds 8 and 9 at the right time to form a handling chime 1.2, and after cooling, the upper and lower molds 8.9 are separated and handled. To easily remove the chime 1 and 2 parts.

[Problem that the invention seeks to solve]

In such a container with a handling chime as shown in FIG. 10, when lifting the container in an upright state, the handling chime 1 at the upper end does not have a downward groove, so the claws of the grip 5 fit deeply in the lower position. Unable to maintain the desired state, the situation becomes unstable. In particular, although there is not much of a problem with the grip 5 that has a specially shaped claw as shown in Fig. 14, it is of no use in cases where the wire is hung directly on other simple hook- or pincer-shaped grips or when the wire is hung directly without a grip. do not have.

The shape of the handling chime 1.2 was determined in consideration of the possibility of detachment due to the mold used during blow molding, as described above.

Therefore, containers are often lifted horizontally. By the way, the laws and regulations regarding the handling of hazardous materials (Cabinet Order No. 29)
(Article 5), ``Transportation containers must be loaded with the storage opening facing upward.'' In order to deal with this, a container on a truck bed that had been transported upright was dropped sideways onto an old tire on the ground, laid on its side, then hooked and hoisted up, then placed upright again on board the ship or in a storage area. However, it involves manual labor-intensive miscellaneous work.

SUMMARY OF THE INVENTION An object of the present invention is to provide a container and a mold for manufacturing the same, which can overcome the disadvantages of the conventional example, can be held stably when lifted upright, and can simplify the lifting operation.

[Means for solving problems]

In order to achieve the above object, the present invention has a blow molding mold that opens horizontally as a whole, and is divided into an upper mold, a body mold, and a lower mold, and the body mold is expandable and retractable in the vertical direction. Using the same mold, a handling chime with a groove is integrally molded in the circumferential direction of the body wall at a position slightly inside from the upper and lower ends of a drum-type container. The gist of both is that it is formed into a cut-off curved shape having a groove that opens inward by a flange that projects inward.

[Effect]

The container of the present invention has a groove that opens downward and inward, especially for the handling chime on the upper end side. Even with a hook, by inserting its claw end into this groove, it can provide sufficient support from below and can be held securely and lifted.

On the other hand, to lift a container horizontally, use the handling chimes on the left and right sides of the container, one of which has both grooves open inward, and insert the claw end of the hook at one end of the lifting wire into this groove. It can be lifted by.

During blow molding, if the body mold is completely contracted, appropriate gaps can be created between the upper mold and the body mold and between the body mold and the lower mold. The entire mold, which is open on both sides, is closed and a certain amount of air is blown into the parison.

Then, when a part of the parison has sufficiently entered the gap between the molds, the body mold is fully expanded, the mold is closed, the gap disappears, and a part of the parison is compressed. Shape a handling chime with a flange.

After the cooling cycle is completed, the body mold is shrunk again to create gaps between the upper mold and the body mold, and between the body mold and the lower mold, and the entire mold is opened left and right to produce the product. Take out.

In this way, sufficient clearance can be formed in the vertical direction between the upper mold and the body mold and between the body mold and the lower mold, so that both handling chimes have flanges that protrude inward. However, the mold can be opened and the product removed without any problem.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, to explain the synthetic resin container of the present invention, FIG. 1 is a partially cutaway front view showing the first embodiment thereof, and FIG.
The figure is a plan view of the same as above, and FIG. 3 is a longitudinal sectional front view of the main part, and the same components as in FIG. 1O showing the conventional example are given the same reference numerals.

That is, it is a drum can type in which an upper handling chime 1 and a lower handling chime 2 are integrally protruded in the circumferential direction at a position slightly further back from the upper and lower ends of the body wall 3, and a tap plug 7 is formed on the upper surface. This container is made of synthetic resin, and is the same as the conventional example in that it is blow molded from thermoplastic synthetic resin.

In the present invention, in such a container, as shown in FIG.
It was made into a disconnected cursor shape with a groove 4 opening inward at point a.

On the other hand, the lower end handling chime 2 is attached to the web 2 so that it is symmetrical to the upper end handling chime 1.
A flange 2a protrudes upward from b, and has a cutout curvilinear shape with a groove 4 opening inward.

Although not shown in the drawings, in another embodiment, the flange, la, and 2a are webs lb as shown in FIG.

It does not have to stand up from 2b at a right angle, but may protrude diagonally or be curved.

Next, to explain how to use it, in order to lift the container upright, there is a piece-shaped claw 1 at the tip as shown in Figures 4 and 5.
A hook 11 having a diameter 1a is attached to the end of the wire 6, and the hook 11 is engaged with the handling chime 1 by inserting the end of the claw 11a into the groove 4 of the handling chime 1. Then, the entire structure may be lifted up using a crane or the like via the wire 6.

Further, in order to suspend the container horizontally, as shown in FIG. 6, the claw 12a of the hook-shaped hook 12 is engaged with the groove 4 opening inside the chime 1.2 for handling the container, which is turned sideways. It will be lifted with wire 6. In this case, a bar 13 for widening the width is interposed between the wires 6 and 6 to prevent the hooks 12 from coming close to each other and the claws 12a from coming off the grooves 4. The length of the bar 13 is the rolling shaft 1.
The distance between the two is approximately the same.

Next, a mold for manufacturing the synthetic resin transportation and storage container of the present invention as described above will be explained.

FIG. 7 is a partial longitudinal sectional front view of a mold for manufacturing the container shown in FIG. The mold 22 is divided into upper and lower ends, and the upper and lower divided molds 221 and 222 are slidable in the vertical direction with respect to the main mold 223 by a hydraulic cylinder 26. Thereby, the entire body part mold 22 can expand and contract in the vertical direction by the amount by which the upper divided mold 221 and the upper divided mold 222 slide.

Although not shown in the drawings, these molds as a whole are thick (divided) into left and right sides.

As a mechanism for sliding the upper split mold 221 and the upper split mold 222, it is possible to use an air cylinder, a pinion, a rack, or other variable mechanism instead of the hydraulic cylinder 26.

The following steps are required to blow mold a container using such a mold.

As shown in FIG. 7, the hydraulic cylinder 26 is retracted and the upper split mold 221 and the upper split mold 222 are slid inward with respect to the main mold 223, and the upper mold 21 and the lower mold 2
On the other hand, if the body mold 22 is shortened by a certain distance and opened, there will be space between the upper mold 21 and the body mold 22, and the body mold 2
An appropriate gap can be secured between the mold 2 and the lower mold 23.

Next, close the left and right openings of the entire mold that were opened earlier,
When a certain amount of air is gradually blown into the parison 10, a portion of the parison 10 uniformly enters the recesses between the molds.

When the parison 10 has entered the concave portion all around the circumference, the upper split mold 2 is removed at the right time as shown in FIG.
21 and the upper split mold 222 are slid outward to extend the body mold 22, the upper mold 21 and the body mold 22, and the lower mold 23 and the body mold 22 are tightly joined to each other. The mold is closed, and a part of the parison 10 is compressed to shape the flanges 1a and 2a of the handling chimes 1 and 2. Then enters the cooling cycle.

After the cooling cycle is completed, if the body mold 22 is contracted up and down,
As shown in FIG. 9, large gaps are formed between the upper mold 21 and the body mold 22, and between the body mold 22 and the lower mold 23, and at the same time, the entire mold is opened left and right.・Remove the product.

〔Effect of the invention〕

As described above, the synthetic resin container of the present invention is a drum-type container in which a grooved handling chime is integrally molded in the circumferential direction of the body wall at a position slightly inside from the upper end and the lower end. Since there is a groove that opens on the inside, even a simple hook can be lowered by inserting its claw end into this groove, especially when lifting the container upright using the handling chime on the top end. It provides sufficient support from the sides and can be held and lifted securely.

In addition, the manufacturing mold for this purpose can form sufficient vertical gaps between the upper mold and the body mold, and between the body mold and the lower mold, so that both handling chimes are relative to each other in the upper and lower directions. Even if the mold has a flange that protrudes in the opposite direction, the mold can be opened and the product taken out without any problem.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing a first embodiment of the synthetic resin container of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a longitudinal sectional front view of main parts, Figs. The figure is a front view showing the container in a lifted state, Figure 6 is a vertical cross-sectional front view of the main parts during lifting, and Figure 7 is a front view of the container when it is lifted.
9 to 9 are partial longitudinal front views showing the manufacturing process of the container, FIG. 10 is a partially cutaway front view of a conventional container, FIG. 11 is a front view showing the same as the above in a lifted state, FIGS. The figure is a partial longitudinal sectional front view showing the manufacturing process, and FIG. 14 is a partial front view showing the grip. ■, 2... Handling chime Ia, la', 2a... Flange lb, 2b... Web 3... Body wall 4... Groove 5... Grip 6... Wire 7. ...Tap plug 8...Upper mold 9...Lower mold
10...Parison 11...Hook ll
a...Claw 13...Bar 21...Upper mold 22...Body mold 221...Upper split mold 222...Upper split mold 2
23...Main mold 23...Lower mold 26...
・Hydraulic cylinder

Claims (2)

[Claims] (1) In a drum-type container in which a handling chime with grooves is integrally molded to protrude in the circumferential direction of the body wall at a position slightly inward from the upper and lower ends, both the handling chimes on the upper and lower ends have flanges that protrude inward. A synthetic resin container characterized by having a substantially L-shaped cross section with a groove opening inward. (2) A blow molding mold whose entire structure opens left and right is divided into an upper mold, a body mold, and a lower mold, and the body mold is capable of expanding and contracting in the vertical direction. Mold for manufacturing synthetic resin containers.