JPS61247627A - Device for molding glass bottle - Google Patents

Abstract

PURPOSE:To shorten the time necessary for molding and to mold a high-quality glass bottle having uniform wall thickness by forming a downward tapering surface in the upper opening of a rough die and closing the upper opening with a blow head and a baffle, successively. CONSTITUTION:A convergent tapering surface 3 is formed on the inside of the upper opening 2 of a rough die 1. After a gob G is charged into the rough die 1, a blow head 7 is attached to the upper opening 2, air is sent into the rough die 1 through an air introducing port 8 and a settle blow is carried out. Then the blow head 7 is removed, a baffle 9 is inserted into the upper opening 2 and fixed and the upper opening 2 is completely closed. Meanwhile, a plunger 6 is moved downward to form an air passage in a mouth die 4. Under such conditions, air is supplied to the plunger block 5 side to carry out a counter blow. Consequently, a specified parison P is formed in the rough die 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a molding device for glass bottles, and particularly to improvements in a molding device used in a blow molding method.

(Prior Art) FIG. 2 shows a conventional blow molding method, in which a parison is formed in the following manner.

■ Attach the mouth mold 22 to the lower part of the rough mold 21, and set it below the mouth mold 22 while holding the plunger 24 in the plunger block 23 at the highest position, and attach it to the upper part of the companion half 21. Place the funnel 25. 25
a is a tapered surface formed on the inner surface of the funnel 25. In this state, as shown in Figure 2 (A),
A predetermined gob (molten glass gob) G is introduced by a delivery device (not shown).

■ After the gob-in, the baffle 26 is stacked on top of the funnel 25, and the air inlet 26a of the baffle 26 is
Settle B low is performed by supplying air while the air is being removed, as shown in FIG. 2(b).

■ When the above setter blow is completed, the baffle 2
6. Remove the funnels 25 one after another, place only the baffle 26 on top of the rough mold 21, and place the plunger 2
4 to form an air flow passage within the mouth mold 22. In this state, air is supplied from the plunger block 23 side to counter blow Counter B.
low), the rough mold 2 is formed as shown in Figure 2 (C).
1, a predetermined parison P is formed. Note that 27 is a neck ring holder.

In the above process, the heat of the gob G after gob-in is half 2
In order to avoid lowering the temperature of the gob G due to being taken away by 1, it is preferable to shorten the time from gob-in to sesotsuuru blow as much as possible, and also shorten the time from senoturu blow and from sesotsuuru blow to counter blow. It's better.

(Problems to be Solved by the Invention) However, according to the conventional device described in 1., the sesoturu blower places the panful 26 on the funnel 25,
Air is supplied through the air inlet 26a of the baffle 26, and since the air flow path between the funnel 25 and the panfur 26 is extremely narrow, the amount of air supplied per hour is small, and therefore the time required for blowing is shortened. It was also getting longer.

Furthermore, between the sesotsu blow and the counter blow, as explained in item (2) above, three operations are required: removal of the baffle 26, removal of the funnel 25, and placement of the baffle 26, and the time between the two blows is It was difficult to shorten it.

Therefore, due to the above-mentioned factors, when forming the parison P from the bump G, the wall thickness may vary and a bottle of poor quality may be formed.

The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to shorten the time required for seset blow, and to shorten the time from set blow to counter blow as much as possible to increase wall thickness. An object of the present invention is to provide a glass bottle molding device that can mold uniform high-quality bottles.

(Means for Solving the Problems) In order to solve the problem described in item 1, the present invention forms a tapered surface that tapers downward as it goes downwards inside the upper opening of the rough mold, and at the same time, during the Setzel blow, the air introduction hole is closed. The upper opening of the phase half is closed by a blow head formed with a blow head, and the counter blow head closes the upper opening of the coarse mold by a panful whose lower external circumferential surface is formed so as to be in close contact with the inner circumferential surface of the upper opening of the phase half. The feature is that the opening is closed.

(Example) An example of the present invention will be described below with reference to FIG.

Reference numeral 1 has a rough shape and is configured to be divided into an appropriate number of pieces around a vertical axis, and inside the upper opening 2 is formed a tapered surface 3 that tapers downward. 4 is the mouth shape,
5 is a plunger block, 6 is a plunger, and the members denoted by numerals 4 to 6 are the same as in conventional molding devices of this type.

7 is a blow head that is attached to the upper opening 2 of the above-mentioned half 1 during the set blow, and an air introduction hole 8 is provided approximately in the center of the blow head.
is perforated from the upper end to the lower end. In the illustrated example, the lower end outer peripheral part of the blow bed 7 is configured to be in close contact with the tapered surface 3 of the partner half 1, but it is not necessary to do so, and the air supply hole With the exception of 8, the upper opening 2 of the other half 1 may be closed.

Reference numeral 9 denotes a baffle on which a lower outer circumferential surface 10 is formed so as to be in close contact with the inner circumferential surface of the upper opening 2 of the mold assembly 1, particularly the tapered surface 3, and, like the blow head 7, No air supply holes are formed.

Next, the molding process of the molding apparatus configured as described above will be explained.

(1) With the phase half 1 and the mouth mold 4 closed and the plunger 6 raised, a predetermined amount of gob G is put into the coarse mold 1 (Fig. 1 (^)).

(2) After the above-mentioned gob-in, the blow head 7 is attached to the upper opening 2 of the phase half 1, and air is sent into the rough mold 1 through the air introduction hole 8 to perform a sesotsu blow (FIG. 1(B)).

(3) When the above-mentioned blowing is completed, the blow head 7 is removed, and the baffle 9 is fitted into the upper opening 2 of the half 1 to completely seal the upper opening 2.

On the other hand, the plunger 6 is lowered to form an air flow passage within the mouth mold 4.

In this state, air is supplied from the plunger blow 5 side to perform a counter blow. As a result, a predetermined parison P is formed in the mold 1 (the first
Figure (C)).

(Effects of the Invention) As explained above, in the present invention, a tapered surface that tapers downward is formed inside the upper opening of the square mold, and at the time of settle blowing, the blow head having an air introduction hole is used to blow the assembly. The upper opening of the mold is closed, and the counter blower is configured to close the upper opening of the mold by a baffle having a lower outer peripheral surface formed in close contact with the inner peripheral surface of the upper opening of the mold. Therefore, the time from gob-in to sesotru blow can be significantly shortened. In addition, the air supply hole drilled in the blow head can be provided straight, and its inner diameter can also be increased, making it possible to increase the amount of air supplied.
The blowing pressure can be increased and the blowing time can be shortened. Further, when performing a sesotsu blow, it is only necessary to insert a baffle into the upper opening of the mold instead of the blow head, so that a counter blow can be applied quickly.

In this way, the time required for sesotsu blowing and counter blowing as well as the time required for sesotsu blowing can be significantly reduced, making it possible to mold bottles with small goblin lines and uniform wall thickness.

Further, according to the present invention, the time required for handling and operating the blow head and panfuru is short, making the work easier and allowing high-quality bottles to be produced in large quantities.

[Brief explanation of drawings]

FIGS. 1(A), (B), and (c) are explanatory diagrams showing one embodiment of the present invention, and FIGS. 2(A), (B), and (
C) is an explanatory diagram showing a conventional example. 1... assembled mold, 2... upper opening, 3... tapered surface,
7...Blow head, 8...Air introduction hole, 9...
Baffle, 10... Lower external circumferential surface, G... Gob, P
...Parison.

Claims (1)

[Claims] In a glass bottle forming apparatus that forms a parison by putting a gob into a rough mold and applying a Setzel blow and a counter blow, a tapered surface that tapers downward as it goes downward is formed inside the upper opening of the rough mold, and a Setzel blow is applied. During counter blowing, the upper opening of the rough mold is closed by a blow head formed with an air introduction hole, and when a counter blow is performed, a baffle whose lower outer peripheral surface is formed so as to be in close contact with the inner peripheral surface of the upper opening of the rough mold is used. A glass bottle molding apparatus, characterized in that the upper opening of the rough mold is closed.