JPH10167736A - Glass bottle and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a glass bottle by forming a funnel-like recess at the center of the inner surface of the bottom of the bottle with the inner surface sloped toward the recess by the aid of the pressure of air blown from the tip of a blow nozzle in a finishing mold so as to intend for using contents in the bottle without any waste. SOLUTION: First, a parison formed in a crude mold with the cavity on the upper part is transferred into a finishing mold assembled with a bottom mold. Subsequently, in the finishing mold, air is blown from the tip of a blow nozzle to provide the center of the inner surface 12 of the bottom with a funnel- like recess 11 with the sharp tip by the aid of the pressure of the air with the inner surface 12 of the bottom communicating with the recess 11 sloped toward the recess 11 and also gradually curved so as to afford the inner surface 12 of the bottom as a whole with elegant shape like the lower part of heart form. In this glass bottle 10 with a neck 13, because a small amount of contents left gathers in the recess 11, the contents can be used up entirely with out any waste by the aid of e.g. a filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass bottle suitable for use in high-grade cosmetics such as liquid cosmetic essences or expensive chemical solutions, and more particularly to a glass bottle having a reduced content remaining on the bottom inner surface of the bottle. And a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, in a glass bottle using an automatic bottle, after forming a parison in a rough mold, the parison is transferred to a finishing mold and compressed air is blown into the parison to make the parison along the finishing mold. Therefore, the inside of the bottle is also formed in a shape substantially following the outside. Therefore, it is not usual to change the shape of only the bottom inner surface of the bottle, and the bottom inner surface of a general well-sealed glass bottle has a slightly thicker center at the center and gently moves toward the periphery. The shape is getting lower.

[0003] The inner surface of the bottom portion of the above-mentioned conventional general glass bottle has a typical shape and thus has no decorative features.
It was difficult to use up the last drop of the expensive contents remaining around the bottom inner surface even with a dropper or brush. Therefore, there has been proposed a technique for manufacturing a glass bottle in which the inner surface at the bottom of the bottle is dented, the surrounding contents are collected in the concave portion, and the contents can be used up using a dropper or a brush.

For example, in the bottle making method disclosed in Japanese Patent Application Laid-Open No. Hei 7-35258, as shown in FIG.
1, air is blown out to make the parison 51 follow the inner surface of the finishing die 50, and the push rod 52 is inserted into the parison 51, the tip of which presses the inner surface of the bottom, and the recess is formed in the center of the bottle bottom. 53 are formed.

[0005] The push rod 52 in the conventional bottle making method described above.
When the tip in contact with the parison 51 is sharpened, it cannot maintain strength enough to withstand high temperatures. Therefore, it is rounded to prevent severe deterioration and consumption due to high heat, and forms a round bottom-shaped depression 53. Therefore, although the depression 53 has a function of collecting the contents, the shape of the depression 53 becomes monotonous, and the periphery of the depression 53 and the inner surface of the bottom are not smoothly continuous, so that the depression 53 can be used for high-grade cosmetics. A glass bottle without such elegance and without decorative features.

In the bottle making method disclosed in Japanese Patent Application Laid-Open No. H8-12348, as shown in FIG. 8, after a parison 57 formed in a normal shape is transferred to a finishing shape 56, a glass bottle opening portion is formed. By inserting the air ejection pipe 59 from the bottom to the vicinity of the bottom inner surface 58 and blowing the air while blowing the air toward one portion of the bottom inner surface 58, a glass bottle in which the bottom inner surface 58 is depressed toward one position is formed. That is.

In the above-mentioned conventional bottle-making method, since the whole bottom inner surface 58 is depressed by the jetted air, together with the above-mentioned conventional example, the filled contents can be taken out with a dropper or a brush without waste. It does not add decorative features to the bottom inner surface 58 of the glass bottle.

[0008]

SUMMARY OF THE INVENTION According to the present invention, the bottom inner surface, which cannot be achieved by the above-mentioned conventional automatic bottle making technique, is provided with a decorative shape and the remaining content can be used up without waste. An object of the present invention is to provide a glass bottle using an automatic bottle and a method for manufacturing the same.

[0009]

In order to solve the above-mentioned problems, a glass bottle of the present invention is a glass bottle having a neck, and the bottom of the bottle is formed by a pressure of air blown from a tip of a blowing nozzle in a finishing die. A funnel-shaped depression was provided at the center of the inner surface, and the bottom inner surface of the bottle continuing to the depression was formed to be inclined toward the depression. As a result, the bottom inner surface has a highly decorative shape similar to the heart-shaped lower portion, and the remaining reduced content can be collected in the center of the bottom.

In order to manufacture the glass bottle, a parison provided with a cavity at an upper portion is moved into a finishing die, and a tip of a blowing nozzle is inserted into a bottom portion of the cavity in a state close to or in contact with the parison, By blowing air from the tip of the blowing nozzle, a funnel-shaped depression is provided at the center of the bottom inner surface of the bottle by the pressure of the air, and the bottom inner surface of the bottle continuous to the depression is inclined toward the depression. It was made to form.

Alternatively, after the neck is formed using a plunger having a sharp tip in the rough mold, the plunger is retracted and compressed air is blown into the cavity to form a cavity having a depression at the bottom above the parison. Then, after moving the parison into the finishing mold, the tip of the blowing nozzle is inserted into the hollow of the cavity in a state of contact or contact, and air is blown from the tip of the blowing nozzle to the inner surface of the bottle bottom. A funnel-shaped depression having a sharp point was formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1 to 5 show a first embodiment of the present invention. FIG. 1 shows a finishing die in which a parison 1 formed in a rough die (not shown) incorporates a bottom die 3. 2 shows the state of the stage of reheating transferred to the inside of FIG.
This shows a state immediately before the blow head 3 descends and a final blow is performed.

As one of the features of the manufacturing method of the present invention, as shown in FIG. 1, a cavity 5 in a parison 1 formed by blowing air at the stage of counter blowing in a rough mold.
Is formed only on the upper part of the parison 1 and is formed on the parison 1 having a large basis weight of a so-called molten glass material.

As another feature of the manufacturing method of the present invention, as shown in FIG. 2, the tip of the compressed air blowing nozzle 6 at the center of the blow head 4 is
Is set at a short distance or in a position in contact with the bottom of the device.

From the state shown in FIG. 2, when compressed air is blown from the tip of the blowing nozzle 6 to perform a final blow, FIG. As shown in the figure, the compressed air intensively blows under the cavity 5 of the parison 1 with a high pressure at the initial movement stage to form a deep hole 7. The compressed air further spreads as the distance between the tip of the blowing nozzle 6 and the bottom of the cavity 5 increases while pushing down the hole 7, and expands the entire parison 1 along the inner surface 8 of the finishing die 2. . In the expansion process of the parison 1, the hole 7 drilled at the initial movement stage is expanded and transformed into a funnel shape that spreads upward as it goes upwards, leaving a trace of sharp air pressure. As shown in the off state, the bottom inner surface 12 of the bottle continuing to the depression 11
Are formed to be inclined toward the depression.

The final blow is completed and the blow head 4
After finishing, the mold of the finishing mold 2 is opened, and as shown in FIG. 5, the molded bottle 10 is taken out of the mold by take-out, and the bottle is completed through a well-known slow cooling process. .

The bottle 10 molded by the above molding method
Is a glass bottle having a neck portion 13, and a funnel-shaped depression 11 having a sharp tip is provided at the center of the bottom inner surface 12 by the pressure of air blown from the tip of the blowing nozzle 6 in the finishing die 2. At the same time, the bottom inner surface 12 of the bottle 10 continuing to the depression 11 is inclined toward the depression 11 and is gently curved. Therefore, the bottom inner surface 12
The whole has an elegant shape like a heart-shaped lower part, and the decorativeness is emphasized as compared with the conventional glass bottle having a monotonous recess on the inner surface of the bottom of the bottle.

Further, since the remaining contents are collected in the depression 11 in the center of the bottom inner surface 12 of the bottle 10, the contents can be used up without waste using a dropper or a brush.

FIG. 6 shows a second embodiment of the present invention, in which a counterblow stage for forming the parison 1 with the rough mold 16 is shown, reference numeral 17 is a baffle, 18 is a mouth mold, and 19 is a mold. Thimble, 20 indicates a plunger.

As a feature of this embodiment, after gob in,
Using the plunger 20 having a sharp tip 20a, the neck 13
Is formed, and then the plunger 20 is retracted, and compressed air is blown into the plunger 20 at the bottom.
A cavity 23 having a small depression 22 formed by the tip 20a is formed above the parison 1 (FIG. 6, counter blow).

After the parison 1 is moved into the finishing die, the tip of the blowing nozzle is inserted into the recess 22 of the cavity 23 in a substantially contacting state or in contact therewith, as in the above-described embodiment. The parison 1 is bottled along the inner surface of the finishing mold by blowing air from the tip of the parison (final blow).

In the above-described manufacturing method, the neck 21 is formed by using the plunger 20 having a sharp tip 20a. Therefore, the bottom of the cavity 23 above the parison 1 formed at the stage of counter blowing is formed. The depression 22 caused by the pressure of the compressed air applied to the trace of the tip 20a of the plunger 20
Is formed. Incidentally, the basis weight of the molten glass material was increased at the stage of forming the parison 20, and the cavity 23 was formed above the parison 20.
Is the same as in the previous embodiment.

Therefore, in the final blow, the compressed air ejected from the nozzle first strikes the depression 22 of the cavity 23 at the initial movement stage, and it is easy to form a hole which is further deepened by the air pressure blown immediately below. Accordingly, a funnel-shaped depression having a sharp tip can be reliably formed on the bottom inner surface of the bottle, regardless of the variation in the shape of the bottom inner surface when the cavity 23 of the parison 20 is formed.

The bottle formed by the manufacturing method according to the second embodiment is substantially the same as the bottle 10 according to the first embodiment, and a description thereof will be omitted.

[0026]

As described above, according to the glass bottle according to the present invention, a funnel-shaped depression is provided at the center of the inner surface of the bottom of the bottle, and the inner surface of the bottom of the bottle continuous with the depression is directed toward the depression. The inner surface of the bottom portion has a shape like a heart-shaped lower portion. Therefore, when the contents are filled, the elegant shape of the bottle bottom can be clearly visually recognized, and the decorative material has high decorativeness suitable as a cosmetic container. In addition, since the remaining contents can be collected at the center of the bottom, expensive contents such as cosmetic essence can be used up without waste using a dropper or brush like a conventional bottle of this type .

On the other hand, according to the manufacturing method of the present invention, the parison provided with the cavity in the upper part is moved into the finishing mold, and the tip of the blowing nozzle is inserted into the bottom part of the cavity in a state close to or in contact therewith, Since the air is blown from the tip of the blowing nozzle, a funnel-shaped depression can be provided at the center of the bottom inner surface of the bottle by the pressure of the air, and the inner bottom surface of the bottle continuous to the depression is inclined toward the depression. Can be formed. Therefore, the bottom inner surface of the bottle can be formed in a shape similar to the lower part of the elegant heart with high decorativeness.

Further, according to the second manufacturing method, the step of forming the parison uses the plunger having a sharp tip so that the trace of the tip of the plunger is formed at the bottom of the cavity formed above the parison. , And the initial compressed air is blown into it, making it easy to form a deep hole with compressed air blown directly below, and ensure that a funnel-shaped dent with a sharp tip on the inner surface of the bottom of the bottle Can be formed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a reheat state in a manufacturing process of a glass bottle of the present invention, in which FIG. 1A is a cross-sectional view, and FIG.

2A and 2B show a state in which a blow head is lowered in a process of manufacturing the glass bottle of FIG. 1, wherein FIG. 2A is a cross-sectional view and FIG.

3A and 3B show an initial state of a final blow in a process of manufacturing the glass bottle of FIG. 1, wherein FIG. 3A is a cross-sectional view and FIG. 3B is a cross-sectional view in the orthogonal direction of FIG.

FIGS. 4A and 4B show a state in which a final blow in the manufacturing process of the glass bottle of FIG. 1 is completed, wherein FIG. 4A is a cross-sectional view and FIG.
FIG.

FIG. 5 is a front view of the glass bottle of the present invention.

FIG. 6 is a cross-sectional view showing another embodiment of the present invention.

FIG. 7 is a sectional view showing a conventional example.

FIG. 8 is a sectional view showing another conventional example.

[Explanation of symbols]

1 parison, 2 finish type, 5 cavity, 6 blow nozzle, 10 bottle, 11 depression, 12 bottom inner surface, 13, neck, 16 coarse type, 20 plunger, 20a tip,
22 hollows, 23 cavities,

Claims (3)

[Claims] 1. A glass bottle having a neck portion, wherein a funnel-shaped recess is provided at a center portion of a bottom inner surface of the bottle by a pressure of air blown from a tip of a blowing nozzle in a finishing mold, and the recess is provided. A bottom inner surface of the bottle that is continuous with the glass bottle is formed to be inclined toward the depression. 2. A parison having a cavity formed in an upper portion thereof is moved into a finishing die, and inserted into a bottom portion of the cavity by bringing a tip of a blowing nozzle into close proximity or contact with the parison, and blowing air from a tip of the blowing nozzle. Thereby, a funnel-shaped depression is provided at the center of the bottom inner surface of the bottle by the pressure of the air, and the bottom inner surface of the bottle continuous to the depression is formed to be inclined toward the depression. Manufacturing method of glass bottle. 3. After forming a neck portion using a plunger having a sharp tip in a rough mold, the plunger is retracted and compressed air is blown to form a cavity having a depression at the bottom above the parison. Then, after the parison is moved into the finishing mold, the tip of the blowing nozzle is inserted into the hollow of the cavity by bringing the tip of the blowing nozzle into close proximity or in contact therewith, and air is blown from the tip of the blowing nozzle, whereby the bottom inner surface of the bottle is removed. A method of manufacturing a glass bottle, wherein a funnel-shaped depression is provided at a central portion by the pressure of the air, and an inner bottom surface of the bottle continuous with the depression is formed to be inclined toward the depression.