JP2001278628A - Base mold of bottle forming machine and method of making bottle using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base mold of the bottle forming machine which can efficiently take away heat from the bottle at the finishing of the glass bottle, and does not cool the inner surface of the finisher too much at the cooling of the bottle; and to provide a method of making the bottle using this base mold. SOLUTION: This base mold is equipped with squirt holes 19 to squirt cooling air 8 from the blower system upwards and inwards against the top surface 12a of the base mold which holds the bottom of the formed bottle 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom mold for a bottle making machine of a press-and-blow system or a blow-and-blow system and a method of manufacturing a bottle using the same.

[0002]

2. Description of the Related Art The production of glass bottles is, for example, at 1200 ° C.
High-temperature molten glass (gob) is supplied into a rough mold to form a parison, and the parison is transferred to a finishing mold by a transfer device. After being formed in the finishing mold by air from a blow head, the mold is opened and taken out. It is taken out of the finishing die by the device, carried out on the dead plate, held for a while in a suspended state, and then placed on the dead plate. During this time, the cooling is performed by cooling the bottle from below the dead plate with cooling air. In this case, it is important how to quickly remove heat from the gob in the high temperature state and solidify the gob to a temperature at which the gob is not deformed.

FIGS. 12 and 13 show a part of a conventional method for manufacturing a glass bottle by a blow-and-blow method. As shown in FIG.
When the bottle 52 is being formed therein, the cooling air 53 is supplied to the ventilation holes 54 a of the distributor 54.
And through the ventilation holes 55a of the bottom mold 55, and through the ventilation holes 51a in the finishing mold 51, the finishing mold 51 and the bottom mold 5
5 is cooled to thereby remove heat from the bottle 52, and the cooling air 57 from another route 56 introduced into the distributor 54 is passed through a ventilation hole 55 b formed in the bottom mold 55, so that the bottom The mold 55 is cooled.

When the molding of the bottle 52 is completed, as shown in FIG. 13, the supply of the cooling air 53, 57 is stopped, the finishing mold 51 is opened, and the bottle is opened by a take-out tong (not shown). The bottle 52 is taken out of the finishing mold 51 by grasping the mouth 52a of 52, carried out onto a dead plate (not shown), held slightly in a suspended state, and then placed on the dead plate. During this time, the bottle is cooled by cooling air from below the dead plate.

FIG. 14 shows a part of a method for producing a glass bottle by a press-and-blow method. In this method, when blow molding is performed in the finishing die 51, suction is applied to the inside of the finishing die 51. Air 58 of the bottom mold 5
5 through a passage 55c and another route 56.

[0006]

In any of the above-mentioned methods, particularly when high-speed production is intended, heat cannot be sufficiently removed from the bottle 52 in the finishing mold 51 and the bottom mold 55. In the system shown in FIG. 14, the bottom mold 55 cannot be cooled by another route 56. As a result, in the conventional bottom die 55, the finish die 51
The temperature of the bottle 52 after the molding in step (1) rises, the top tilts (the difference between the maximum value and the minimum value of the total length of one bottle), and the eccentricity (the bottle rotates one turn based on the bottom with one bottle). (The degree of inclination of the bottle when the bottle 52 is tilted), and there is a problem that the bottle 52 is deformed such as a defective body diameter.

[0007]

SUMMARY OF THE INVENTION On the other hand, Japanese Unexamined Patent Application Publication No.
As shown in Japanese Patent Application Publication No. 000-7353, immediately after opening the finishing mold, cooling air from the distributor is blown upward from ventilation holes formed in the bottom mold to cool the outer surface of the bottle. There is something.

However, the above-mentioned publication uses vertical flow air, and has a drawback that the air pressure cannot be adjusted when the cooling air is blown out after the finishing mold is opened. Further, since the ventilation holes are opened right above, the inner surface of the finishing mold is excessively cooled by the cooling air that is jetted out, which may adversely affect the bottle skin. Furthermore, there is a problem that the bottom die is made of a copper alloy, and the cost is higher than that of a normal casting.

The present invention has been made in consideration of the above-mentioned matters, and an object of the present invention is to efficiently remove heat from a bottle at the time of finishing the glass bottle, and at the same time, to cool the bottle at the time of cooling the bottle. An object of the present invention is to provide a bottom mold for a bottle making machine which does not excessively cool the surface and a method for producing a bottle using the bottom mold.

[0010]

In order to achieve the above object, a bottom mold of a bottle making machine according to the present invention is provided with an upper portion for holding a bottom of a molded bottle and receiving cooling air from a blowing mechanism in an upper portion thereof. It is characterized in that a jet hole for jetting in the direction is opened (claim 1).

According to the bottom mold having the above-described structure, since the ejection holes are provided inwardly upward, that is, toward the body of the bottle after molding, the cooling air from the ejection holes is applied to the body of the bottle. The bottle can be cooled quickly by directly hitting, thereby preventing the bottle from being deformed. Then, the cooling air from the ejection holes does not go toward the inner surface of the opened finishing die, and does not lower the temperature of the inner surface. In addition, since the air ejection hole for cooling the bottle is formed in the bottom mold, the bottom mold itself is cooled by this cooling air, so it is necessary to form the bottom mold with a special and expensive material such as a body alloy. There is no cost reduction.

[0012] For example, when the bottom surface is a square bottle such as a square, four flat side surfaces may be cooled, and in this case, the ejection hole is formed only in a predetermined area. Just do it.

It is preferable that the ejection hole is formed at an angle of 1 to 30 ° with respect to the longitudinal axis of the bottom mold.

In the bottom mold of the bottle making machine, when the pressure of the cooling air is made adjustable, the time required for cooling can be arbitrarily adjusted according to the cooling temperature. .

Further, in the bottom mold of the above-mentioned bottle making machine, as described in claim 5, a suction hole for sucking air in the finishing mold at the time of forming the bottle may be formed in the bottom mold. In this case, finish blow molding can be suitably performed.

Further, the method for producing a bottle using the bottom mold of the bottle making machine according to the present invention is characterized in that, when the finishing mold is opened after the bottle is formed, the bottle is upwardly directed inward from the ejection hole formed in the upper surface of the bottom mold. It is characterized in that the outer surface of the bottle is directly cooled by the cooling air ejected to the outside (claim 6).

[0017]

Embodiments of the present invention will be described with reference to the drawings. 1 to 6 show a first embodiment of the present invention.
In this embodiment, it is assumed that a bottle having a circular bottom is manufactured. First, in FIG. 1, reference numeral 1 denotes a distributor, which is held by a suitable support device 2. This distributor 1 has
A slightly large-diameter ventilation hole 3 is vertically formed at the center thereof, and a plurality of ventilation holes 4 are vertically formed around the ventilation hole 3 and near the periphery. Then, as shown in FIG. 4C, an air supply mechanism 7 having a blower pump 5 and a pressure controller 6 on the upstream side is connected to the ventilation hole 3, and air 8 at a predetermined pressure is supplied. In addition, ventilation hole 4
Is supplied with air 9 from an air supply mechanism (not shown) of a different system from the air supply mechanism 7.

Reference numeral 10 denotes a bottom die placed on the upper surface of the distributor 1, and as shown in FIG. 2, the bottom die base 11 has a plan view shape obtained by linearly cutting opposing portions of the circumference.
And a bottom mold upper part 12 which is integral with the bottom mold base 11 and has a smaller diameter than the bottom mold base 11 and has a circular shape in plan view. In the center of the upper surface portion 12a of the bottom mold upper portion 12, a concave portion 14 that fits the bottom portion of the bottle 13 is formed. Further, the bottom die base 11 has a ventilation hole 15 communicating with the ventilation hole 3 of the distributor 1 and a positioning pin 16 fitted into a positioning recess of the distributor 1.
On the other hand, the distributor 1 is provided with a locator 17 fitted into the ventilation hole 15, and the positioning pin 16 and the locator 17 couple the distributor 1 and the bottom mold 10 in a separable and positionable manner. ing.

The upper end of the central ventilation hole 15 communicates with a plurality of slightly smaller ventilation holes 18 formed in the bottom mold 12. As shown in FIG. 2, the ventilation holes 18 are formed so as to radially divide the circumference into, for example, six equal parts around the ventilation holes 15, and each ventilation hole 18 is closed at a side surface of the bottom mold upper portion 12. And communicates with a plurality of ejection holes 19 that open on the same circumference on the upper surface portion 12a. Each ejection hole 19 opens outside the concave portion 14 formed in the upper portion 12 of the bottom die 10, and as shown in FIG. It is opened in a state of being inclined inward and upward so as to form. More specifically, each ejection hole 19 has a diameter of about 1 to 6 mm, and its center line 1
9c is about 1 to 30 degrees. In addition, a ventilation hole 20 communicating with the ventilation hole 4 on the distributor 1 side is provided vertically through the bottom base 11 with the ventilation hole 15 at the center. The bottom mold 10 is made of a casting or an appropriate material.

Reference numeral 21 denotes a finishing die which is provided on the upper part of the bottom die 10 so as to be openable and closable, and comprises two half-shaped dies 21A and 21B, which are formed so as to be in close contact with the bottom die 10 below. Each of the half molds 21A and 21B has a ventilation hole 2 communicating with the ventilation hole 20 on the bottom mold base 11 side.
2 is vertically penetrated and communicates with a small exhaust hole 24 for leading air 23 present inside the finishing mold 21 to the outside of the finishing mold 21 during bottle molding,
An exhaust hole 25 opened to the outside is appropriately formed. The configuration of the finishing die 21 is not different from a general finishing die.

The operation of the first embodiment will be described with reference to FIGS. Now, as shown in FIG. 4A, the parison 26 is supplied to the finishing die 21, and as shown in FIG. 28 is blown into the parison 26, whereby the parison 26 is formed into the round bottle 13 having a predetermined shape. At the time of this molding, cooling air 9 from an air supply mechanism different from the air supply path 7 is sent into the ventilation hole 22 of the finishing die 21 through the ventilation hole 4 of the distributor 1 and the ventilation hole 20 of the bottom mold 10. Thereby, the bottom mold 10 and the finish mold 21 are cooled. Further, the air 23 in the finishing die 21 is pushed out of the finishing die 21 through the small exhaust holes 24 and the exhaust holes 25.

When the molding is completed, the supply of the cooling air 9 is stopped, and as shown in FIGS. 3 and 4C, the finishing mold 21 is opened, and the bottle 13 is exposed. In this state, the air supply mechanism 7 is operated to supply the cooling air 8 adjusted to a predetermined pressure to the ventilation holes 3 of the distributor 1. The cooling air 8 passes through the ventilation holes 15 of the bottom mold 10 and passes through the ventilation holes 1.
8, and further, the ejection holes 19 connected to the ventilation holes 18.
Injected toward the bottle 13. This vent 19
Since it is located around the bottle 13 and opens upward and inward with respect to the longitudinal axis 10 c of the bottom mold 10, the cooling air 8 is supplied to the body of the bottle 13 as shown in FIGS. And the bottle 13 is directly cooled by the cooling air 8.

The bottle 13 cooled by blowing the cooling air 8 is subjected to a dead plate (not shown) by a take-out device 29 as shown in FIG.
After being carried out and held for a while in a suspended state, it is placed on a dead plate.

In the above-described embodiment, after the molding, the mold is opened and, at the same time, the cooling air 8 is blown out from the blowing holes 19 formed in the bottom mold 10 to directly blow the cooling air 8 onto the outer surface of the bottle 13. Thus, the bottle 13 is directly cooled. Therefore, the bottle 13 can be cooled in a short time. Further, since the cooling air 8 passes through the ventilation holes 3, 15, 18 inside the distributor 1 and the bottom mold 10, the bottom mold 10 is also cooled, so that the bottle 13 can be cooled in a short time.

The number and positions of the outlets 19 can be arbitrarily set according to the height and diameter of the bottle 13.
The diameter of the ejection hole 19 is preferably about 1 to 6 mm. When the diameter is small, the flow rate of the cooling air 8 decreases. When the diameter is too large, the flow rate of the cooling air 8 decreases, and a desired cooling effect cannot be obtained. .

When the pressure of the cooling air 8 is adjustable, the time required for cooling can be arbitrarily adjusted according to the cooling temperature, and a desired cooling effect can be obtained.

In the above embodiment, the finishing mold 2
Because the bottle 13 finished by 1 was round,
The ejection holes 19 are formed over the entire circumference on the same circumference. For example, as shown in FIG. 6, when the bottle 13 is square, as shown in FIG.
The ejection holes 19 may be provided as appropriate, or may be provided in a region corresponding to a specific pair of side surfaces.

FIGS. 7 to 9 show a second embodiment. In this embodiment, the finishing die 21 is evacuated during blow molding. In this embodiment, FIG. As shown in FIG. 8, six suction holes 30 and cooling ventilation holes 31 are alternately formed in the bottom mold upper portion 12 of the bottom mold 10 so as not to cross each other. As shown in FIG. 7, one end of the suction hole 30 communicates with an exhaust hole 32 connected to the small exhaust hole 24, and the other end of the suction hole 30 communicates with the ventilation hole 3 of the distributor 1.
5 is connected. In this embodiment, a suction mechanism (not shown) provided with a suction pump or the like is connected to the other end of the ventilation hole 3. Note that the upper end side of the exhaust hole 32 is closed.

As shown in FIG. 7, a plurality of cooling ventilation holes 31 are closed on one end side on the side surface of the bottom mold upper portion 12 and open on the same circumference on the upper surface thereof. Are respectively connected to the ejection holes 33. Each ejection hole 33 has the same structure and function as the ejection holes 19 in the first embodiment. The other end of the ventilation hole 31 is connected to a ventilation hole 37 formed in the distributor 1 via ventilation holes 34 and 35 formed in the bottom mold 10 and a communication member 36.
An air supply mechanism (not shown) having a pressure adjusting function is connected to the ventilation hole 37.

The operation in the second embodiment will be described. As shown in FIG. 7, when the finishing die 21 is closed and the bottle 13 is blow-molded, cooling air from an air supply mechanism (not shown) is used. 9 is distributor 1
Through the ventilation holes 4 of the bottom die 10 and into the ventilation holes 22 of the finishing die 21, whereby the bottom die 10 and the finishing die 21 are cooled. And the finishing mold 21
The inside air 23 is supplied to the small exhaust holes 24, the exhaust holes 32, and the suction holes 3 by the operation of the suction mechanism connected to the ventilation holes 3.
0, the air is sucked in the direction of the suction mechanism via the ventilation holes 15 and the ventilation holes 3 and discharged from the finishing mold 21.

When the molding is completed, the supply of the cooling air 9 and the suction by the suction mechanism are stopped, and as shown in FIG.
The finishing mold 21 opens, and the bottle 13 is exposed. In this state, an air supply mechanism (not shown) is operated to supply the cooling air 38 adjusted to a predetermined pressure to the ventilation holes 37 of the distributor 1. The cooling air 38 enters the ventilation hole 31 via the communication member 36 and the ventilation holes 35 and 34 formed in the bottom mold 10, and is further injected toward the bottle 13 from the ejection hole 33 communicating with the ventilation hole 31. . This spout 3
3 is a vertical line of the bottle 13 which is located around the bottle 13
3b, the cooling air 38 is blown to the outer surface of the bottle 13 around the body, and the bottle 13 is directly cooled by the cooling air 38.

The features of the bottom mold of the bottle making machine of the present invention and the method of manufacturing a bottle using the same will be described with reference to numerical values. According to the present invention, round bottles having a content of 120 mL, square bottles having a content of 660 mL, and the like were manufactured. When the bottle manufactured by the present invention and the finishing mold in the bottle manufactured by the conventional apparatus were opened and the temperature of the bottle body immediately before the bottle was taken out by the take-out tongue was measured by an infrared imaging apparatus, the result as shown in FIG. 10 was obtained. was gotten.
That is, FIG. 1A shows the temperature of the outer surface of the bottle produced by the present invention, and FIG. 2B shows the temperature of the outer surface of the bottle produced by the conventional method. . From this figure, it can be seen that the bottle body outer surface temperature averages 705 ° C. in the conventional method, but 655 ° C. in the method of the present invention.
It can be seen that the cooling effect of the method of the present invention is high.

FIG. 11 shows the relationship between the cooling air pressure and the bottle surface temperature. It can be seen from FIG. 11 that the cooling effect increases as the cooling air pressure increases.

Table 1 below shows the measurement results of the inclination and eccentricity when a 120 mL round bottle was manufactured using the conventional method and the method of the present invention. These values are affected by the degree of deformation of the bottle, and are easily deformed when the bottle temperature is high, and show large values. It can be seen from Table 1 that the bottle according to the present invention has a smaller average value and standard deviation for both the top tilt and the eccentricity.

[0035]

[Table 1]

Table 2 below shows that 100 m using the present invention was used.
The production speeds of the three types of L and 120 mL round bottles are compared with the conventional method as 100. From Table 2, it can be seen that the production speed can be increased by using the present invention.

[0037]

[Table 2]

Table 3 below shows a comparison of the variation in capacity between the conventional method and the method of the present invention in a 660 mL vial. From this Table 3, it is possible to suppress the deformation of the bottle body by using the method of the present invention,
It can be seen that the variation in capacity can be reduced.

[0039]

[Table 3]

[0040]

As described above, according to the present invention, the bottle can be directly cooled from the time when the finishing die is opened, and the outer surface temperature can be reduced. Therefore, deformation of the bottle can be effectively prevented, and a high-quality bottle can be manufactured. Since the cooling effect is high, the production speed can be increased, and the improvement of the productivity and the quality can be promoted. Further, according to the present invention, the change of the material of the bottom mold is not particularly required, and the present invention can be implemented only by improving the conventional apparatus simply and inexpensively, so that the effect is extremely large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a finishing mold of a device according to a first embodiment is closed.

FIG. 2 is a plan view of the device.

FIG. 3 is a longitudinal sectional view showing a state in which a finishing mold of the device is opened.

FIG. 4 is an operation explanatory diagram.

FIG. 5 is a perspective view showing a state in which cooling air is blown on a bottle.

FIG. 6 is a perspective view for explaining another embodiment of the first embodiment.

FIG. 7 is a longitudinal sectional view showing a state in which a finishing mold of the device according to the second embodiment is closed.

FIG. 8 is a plan view of the device.

FIG. 9 is a longitudinal sectional view showing a state in which the finishing mold of the device is open.

FIG. 10 is a diagram for explaining the effect of the present invention.

FIG. 11 is a diagram illustrating an example of a relationship between a cooling air pressure and a bottle surface temperature.

FIG. 12 is a longitudinal sectional view showing an example of a conventional finishing die and a bottom die, showing a state in which the finishing die is closed.

FIG. 13 is a longitudinal sectional view showing an example of a conventional finishing die and a bottom die, showing a state where the finishing die is open.

FIG. 14 is a longitudinal sectional view showing another example of the conventional finishing mold and bottom mold, showing a state in which the finishing mold is closed.

[Explanation of symbols]

8, 38: cooling air, 10: bottom type, 10c: vertical axis, 1
2a: Upper surface part, 13: Bottle, 19, 33: Jet hole, 30
... Suction holes.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Sakuma 2-21, Hamamatsubara-cho, Nishinomiya-shi, Hyogo Prefecture Inside Yamamura Glass Co., Ltd. (72) Inventor Naomichi Mori 2-21 Hamamatsubara-cho, Nishinomiya-shi, Hyogo Japan Yamamura Glass Co., Ltd.

Claims (6)

[Claims] 1. A bottle-making machine characterized in that a blowout hole for blowing cooling air from a blower mechanism upward and inward is formed on an upper surface portion for holding a bottom surface of a molded bottle. Bottom type. 2. The bottom mold of a bottle-making machine according to claim 1, wherein the ejection holes are formed only in predetermined regions. 3. The injection hole has a length of 1 to 30 with respect to the vertical axis of the bottom mold.
The bottom mold of the bottle-making machine according to claim 1 or 2, wherein the bottom mold is opened at an angle of °. 4. The bottom mold of a bottle-making machine according to claim 1, wherein the pressure of the cooling air is adjustable. 5. The bottom mold is provided with a suction hole for sucking air in the finishing mold during bottle molding.
5. The bottom type of the bottle-making machine according to any one of items 4 to 4. 6. The outer surface of the bottle is directly cooled by cooling air that is blown upward and inward from a blow hole formed in the upper surface of the bottom die when the finishing die is opened after the bottle is formed. Manufacturing method using the bottom mold of the bottle making machine.