JPH0959031A - Device for molding glass bottle and plunger device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plunger device of a rough mold, good in the ventilation of a gas and capable of simply molding the mouth part of a prison in a short time. SOLUTION: A plunger device for molding a glass bottle in a rough mold has a neck ring 12 and a plunger 14 in the lower part of the rough mold 20, and can mold the mouth part 18 of a parison P between the neck ring 12 and the tip part 46 of the plunger 14. A gas vent hole 70 communicated with the cavity 121 of the plunger 14 is disposed in the tip part 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rough plunger device used when a glass bottle is molded by a blow and blow method.

[0002]

2. Description of the Related Art A process for molding a glass bottle by a conventional blow-and-blow method will be roughly described with reference to FIG. 7. In FIGS. Gob ".) A parison 5 as a semi-finished product is manufactured from G, and in Fig. 7d, this parison 5 is transferred to a finishing mold 6 by using a reversing device 100, and in Figs. The glass bottle 7 as the final product is molded, and the glass bottle 7 is taken out from the finishing mold 6 in FIG. 7g. In FIG. 7b, the plunger 2 is projected into the rough mold 1, and the tip portion 2a of the plunger 2 and the mouth mold (hereinafter referred to as "neck ring").
The mouth 3 of the parison 5 is molded between the 9 and 9, and in FIG.
The plunger 2 is lowered, and air is blown into the gob G of the rough mold 1 through the gap between the plunger 2 and the guide ring 8 to form the parison 5. The conventional blow-and-blow method of this kind is known as a molding method suitable for molding a so-called narrow mouth glass bottle.

FIG. 8 shows an enlarged view of the neck ring 9 in the rough mold 1 described above. The molding procedure of the mouth 3 of the parison 5 will be described with reference to FIG. 8. First, the gob G falls into the rough mold 1 as described above (FIG. 7a).
Then, the plunger 2 rises and its tip portion 2a
Enters the guide ring 8 inside the neck ring 9. After that, as shown in FIG. 7b, the baffle 101 rides on the funnel 103, a settling blow is performed through the supply hole of the baffle 101, and the gob G is compressed from above to form the mouth 3 of the parison 5. .

[0004]

According to this conventional method, it is necessary to raise the plunger 2 and receive it just before the gob G enters the guide ring 8 in the neck ring 9. The timing control of the elevation of the plunger 2 is extremely difficult. If the elevation of the plunger 2 is too slow, the glass will squeeze out from the neck ring 9, and if it is too fast, the gas escape in the rough mold 1 will deteriorate. The so-called shortage of parison 5 occurs. Especially when molding the large mouth part 3 of the parison 5 or when the long plunger 2 is used.
When using, it is easy to get out of mouth. For this,
Conventionally, a neck ring 9 in which a vent (not shown) for releasing air in the rough mold 1 is formed has been proposed.

However, in the case where the neck ring 9 is formed with a vent, the gas cannot sufficiently escape to the outside as the residual gas amount in the rough mold 1 increases. Therefore, under the present circumstances, the timing of adjusting the rise of the plunger 2 is adjusted, the pressure of the settling blow is increased, and the blow time is lengthened to perform control so as to satisfy both the glass protrusion and the gas escape. However, there is a problem that such control becomes extremely difficult.

In view of the above, the present invention solves the above problems and provides a plunger device having a simple structure which prevents the glass from protruding, has good gas release, and can easily form the mouth of a parison in a short time. It is intended to be provided.

[0007]

The invention according to claim 1 has a mouth mold and a plunger in the lower part of the rough mold, and the mouth part of the parison can be molded between the tip part and the mouth mold of the plunger. In the rough mold glass bottle molding plunger device described above, the tip portion is provided with a gas escape hole connected to the inside of the cavity of the plunger.

According to the first aspect of the invention, the gas can be easily escaped to the outside from the gas escape hole formed in the tip portion of the plunger. It can be easily molded. Also, because of this, gas escape is improved, and the mouth of the parison can be easily molded in a short time. Further, since the gas escape hole of the plunger also serves as a passage for the compressed gas at the time of counter-blowing, the plunger itself can be cooled and controlled to an appropriate temperature.

The invention of claim 2 is characterized in that the gas escape hole is provided on the top surface of the tip portion. According to this, since the gas escape hole is on the top surface of the tip portion, it is possible to more easily escape the gas in the rough mold, and it is possible to cool the top surface of the plunger, which is particularly easily heated, to control the temperature appropriately. .

According to a third aspect of the present invention, the gas escape hole is a knife vent-shaped slit. According to this, it is possible to let the gas escape to the outside of the rough mold and prevent the gob from entering through the slit.

According to a fourth aspect of the present invention, in a glass bottle molding machine for molding a glass bottle by a blow and blow method, a rough mold for accommodating a gob, a baffle, and a compressed gas are supplied into the rough mold. A compressed gas supply means, a mouth die arranged in a rough mold, and a plunger that is inserted into the mouth mold when the gob enters the mouth mold and molds the mouth of the parison. And a plunger having a gas escape hole at the top for allowing the gas to escape to the outside of the rough mold.

In the invention of claim 4, when the gob is put in the rough mold and pressure is applied to the gob with compressed gas to form the mouth of the gob, the gas in the rough mold is discharged from the gas escape hole of the plunger. Since it can be easily released, it is possible to prevent the shortage at the mouth portion and easily mold the mouth portion. Therefore, the time for supplying the compressed gas can be shortened and the pressure of the compressed gas can be reduced. Further, since the gas escape hole of the plunger serves as a passage for the compressed gas during counter blow, the plunger itself can be cooled and controlled to an appropriate temperature.

According to a fifth aspect of the present invention, the gas escape hole is
Since it is a knife vent-shaped slit, it is possible to easily escape the gas. According to a sixth aspect of the present invention, the formation width of the gas escape hole is 0.1 to 0.7 mm. If the formation width of the gas escape hole is smaller than 0.1 mm, the efficiency of gas escape decreases, and if it is larger than 0.7 mm, the gob may enter through the gas escape hole. It is suitable.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a preferred embodiment of a glass bottle forming plunger device and its peripheral devices, and FIG. 2 shows an enlarged view of a preferred embodiment of the glass bottle forming plunger device of FIG.

In FIGS. 1 and 2, reference numeral 10 denotes a plunger device, which is a mouth type (hereinafter, referred to as
It is called "neck ring". ) 12 and the plunger 14. The mouth portion 18 of the parison P as a semifinished glass bottle is formed between the tip portion 46 of the plunger 14 and the neck ring 12.

A baffle 22 can be installed on the upper part of the rough mold 20. When molding the mouth portion 18 of the parison P, a funnel (not shown) (see, eg, FIG. 7b) is used to connect the baffle 22 and the rough mold 20. This baffle 22 is inserted between
Settle Blow (compressed air) S to the gob in the rough die 20 through the funnel.
T is supplied from the settling blow supply means 26. On the other hand, in the lower part of the rough mold 20, the upward direction Z1 or the downward direction Z1.
2 is provided with an operation unit 24 that allows the plunger 14 to move up and down. This operation unit 24 is the plunger 14.
A piston rod 28, a fixing split ring 30 for integrally fixing the plunger 14 and the plunger adapter 28, a spring 32, and the like are housed. The plunger 14 is provided with a groove 14a.

One of the fixing split rings 30 meshes with the groove 14a of the plunger 14, and the other of the fixing split ring 30 meshes with the groove 28a of the plunger adapter 28. The lower part of the plunger adapter 28 is connected to the upper end side of the hollow compressed air piston rod 34, and the ring 34 a of the piston rod 34 is
A spring 32 is arranged between the flanges 28c of the member 28b located on the outer circumference of the plunger adapter 28. The piston rod 34 is installed on the base 38,
When the parison P is molded, the counter blow supply means 40
As shown in FIG. 2, through the piston rod 34 and the hollow member 42, the hollow portion 121 of the plunger 14 is entered, and through the counter blow hole 50 and the hollow hole 14b, counter blow (Counter Blow; compressed air) CT is performed.
Is supplied to the mouth portion 18 side.

At the bottom of the rough mold 20, as shown in FIG.
Neck ring 12 is attached, this neck ring 1
A guide ring 44 is concentrically mounted in the unit 2.
The tip portion 46 of the plunger 14 is fitted into the hole 44a of the guide ring 44, and the shoulder portion 4 of the plunger 14
A counter blow hole 50 is formed at 8. The sleeve 52 is attached to the plunger 14 so as to surround the portion of the plunger 14 below the shoulder portion 48.

Outer peripheral surface 4 of the tip portion 46 of the plunger 14.
6a is in close contact with the inner peripheral surface of the hole 44a of the guide ring 44. On the top surface 60 of the tip portion 46 of the plunger 14,
As shown in FIGS. 3 to 5, the gas escape hole 70 is preferably formed by wire cut electric discharge machining. As shown in FIG. 5, the gas escape hole 70 is a hole formed in an “asterisk type” and is a knife vent-shaped slit. The hole width of the gas escape hole 70 is preferably 0.1 mm to 0.7 mm. Gas escape hole 7
When the hole width of 0 is narrower than 0.1 mm, the efficiency for degassing a large amount of gas in the rough mold 20 becomes poor, and when the hole width of the gas escape hole 70 is larger than 0.7 mm, the gob This is because there is a risk that some will invade. Next, the operation will be described. Referring to FIG. 1, the baffle 22 is removed, a funnel (not shown) is applied to the position, and the gob is dropped from an orifice (not shown).
Enter inside. At the same time, when the plunger 14 is raised, the tip portion 46 of the plunger 14 enters the guide ring 44 of the neck ring 12. After that, the baffle 22 is placed on the funnel (not shown) of the rough mold 20, and the settling blow (compressed air) from the settling blow supply means 26 is applied to the rough mold 20 to apply pressure to the gob in the rough mold 20. When applied, the mouth portion 18 is formed by the cooperation of the tip portion 46 of the plunger 14, the neck ring 12 and the guide ring 44.

In the above steps, since there is no escape route for the gas remaining in the rough mold 20, according to this embodiment, the gas escape hole 70 is provided in the top surface 60 of the plunger 14. The gas escape holes 70 prevent the gas in the rough mold 20 from escaping and prevent the gob from protruding. That is, since the gas escape hole 70 is a slit having a very narrow hole width formed by wire cut electric discharge machining, the gob is prevented from protruding through the gas escape hole 70. Further, since this gas escape hole 70 is of the "asterisk type", the total opening area of the hole can be made large. Therefore, it is possible to sufficiently release the gas in the rough mold 20.

In short, according to this embodiment, even if the plunger 14 is in the raised position, the gas in the rough mold 20 passes through the gas escape hole 70, and then the central hole 14b, the hollow member 42, and the guide member. It is discharged to the outside via 34.
Therefore, even if the rising timing of the plunger 14 is early, there is no problem in degassing, it is possible to prevent the insufficient opening of the mouth portion 18, and the molding of the mouth portion 18 of the parison P becomes easy. Further, the settling blow ST time can be shortened, the blow pressure can be reduced, and the settling wave can be reduced and the throat can be improved.

When the plunger 14 is lowered by a predetermined distance, a gap is created between the tip portion 46 of the plunger 14 and the guide ring 44, and a counter blow (compressed air) is fed from the counter blow supply means 40 upward from the lower side through this gap. ) When CT is blown through the guide member 34, the hollow member 42, the counter blow hole 50, etc., a hollow portion is formed in the parison P as indicated by a broken line.

Note that, referring to FIG. 2, when the counter blow (compressed air) CT is supplied to the gob to form the hollow portion of the parison P, the gas escape hole 70 of the plunger 14 is provided in the counter blow. Since it becomes a passage, the top surface 60 of the plunger 14, in particular, is cooled, so that it can be controlled to an appropriate temperature.

The above steps correspond to the steps of FIGS. 7a to 7c, and thereafter, the steps of FIG. 7d, the steps of FIGS. 7e to 7f, and the steps of FIG. It is taken out as the final glass product in a process corresponding to the process.

The present invention has been described above based on the embodiment, but the present invention is not limited to the above embodiment. For example, as shown in the embodiment of FIGS. 1 and 2, as the gas escape hole 70, the one adopting the “asterisk type” hole of FIG. 6A has been described.
It is also possible to employ holes having shapes as shown in (B) to FIG. 6 (I). The gas escape hole 70 in FIG.
6 ", the gas escape hole 70 of FIG. 6C is a" rice mold ", FIG.
The gas escape hole 70 of (D) is “H type”, the gas escape hole 70 of FIG. 6 (E) is “S type”, the gas escape hole 70 of FIG. 6 (F) is “Z type”, and FIG. 6) the gas escape hole 70 is "king type", the gas escape hole 70 of FIG. 6 (H) is "+ type", and the gas escape hole 70 of FIG. 6 (I) is "ohm (Ω) type".
It is.

[0026]

As described above, according to the first aspect of the invention, when molding the mouth of the parison using the tip part of the plunger, the gas remaining in the rough mold is discharged from the tip part of the plunger. Since the gas can be easily released to the outside through the gas escape hole, it is possible to prevent the insufficient opening of the mouth and easily form the mouth. Therefore, outgassing is improved,
The mouth of the parison can be easily molded in a short time.

According to the second aspect of the invention, since the gas escape hole is provided on the top surface of the tip portion, the gas in the rough mold is more easily escaped, and the compressed gas is supplied to the gob to form the parison. In this case, the compressed gas is used as a passage, so the top surface of the plunger, which is easily heated by the gob, can be cooled and controlled to an appropriate temperature.

According to the third aspect of the invention, it is possible to let the gas escape to the outside of the rough mold and prevent a part of the gob from entering.

In the invention described in claim 4, when the gob is put in the rough mold and a pressure is applied to the gob by the compressed gas to mold the mouth of the parison using the plunger, the gas in the rough mold is Since the gas can be easily escaped from the gas escape hole of the plunger, it is possible to prevent the insufficient ejection at the mouth and easily form the mouth. Therefore, the time for supplying the compressed gas can be shortened and the compressed gas pressure can be reduced. Also,
The gas escape hole of the plunger serves as a passage for the compressed gas when the compressed gas is supplied to the gob to form the parison, so that the top surface of the plunger is cooled in particular and can be controlled to an appropriate temperature.

In the invention of claims 5 to 6, the gas in the rough mold can be easily escaped, and if the width of the gas escape hole is smaller than 0.1 mm, the efficiency of gas escape is reduced and 0 If it is larger than 0.7 mm, a part of the gob may enter the gas escape hole, while the hole width is within this range, so that the above-mentioned drawbacks are eliminated.

[Brief description of drawings]

FIG. 1 is a view showing a preferred embodiment of a glass bottle forming plunger device and its peripheral devices.

FIG. 2 is an enlarged view showing a preferred embodiment of the glass bottle forming plunger device of FIG.

FIG. 3 is a diagram showing a plunger.

FIG. 4 is an axial sectional view of a plunger.

FIG. 5 is a view showing a top surface of a plunger and its gas escape hole.

FIG. 6 is a view showing another embodiment of the gas escape hole on the top surface of the plunger.

FIG. 7 is a diagram showing a conventional blow-and-blow method.

FIG. 8 is a view showing a conventional glass bottle molding plunger device.

[Explanation of symbols]

 12 Neck Ring (Mouth) 14 Plunger 18 Mouth 20 Coarse 26 Settle Blow Supply Means (Compressed Gas Supply Means) 46 Tip Part 70 Gas Evacuation Hole 121 Cavity P Parison

Claims (6)

[Claims] 1. A glass bottle molding plunger device comprising a mouth mold and a plunger at a lower portion of a rough mold, wherein a mouth of a parison can be molded between a tip portion of the plunger and the mouth mold. A plunger device for glass bottle molding, wherein a gas escape hole connected to the cavity of the plunger is provided in the tip portion. 2. The plunger device for glass bottle molding according to claim 1, wherein the gas escape hole is provided on the top surface of the tip portion. 3. The glass bottle molding plunger device according to claim 1, wherein the gas escape hole is a knife vent-shaped slit. 4. A glass bottle molding apparatus for molding a glass bottle by a blow-and-blow method, in which a rough mold for accommodating a gob, a baffle provided above the rough mold, and a compressed gas for supplying a compressed gas through the baffle. A feeding means, a mouth die provided at the bottom of the rough mold for molding the mouth of the parison, and a gob falling into the rough mold is inserted into the mouth mold to insert the parison mouth into the mouth mold. A glass bottle molding apparatus comprising: a plunger for molding, and a plunger having a gas escape hole at the top for allowing gas in the rough mold to escape to the outside. 5. The glass bottle molding apparatus according to claim 4, wherein the gas escape hole is a knife vent-shaped slit. 6. The glass bottle molding apparatus according to claim 4, wherein the gas escape hole has a hole width of 0.1 to 0.7 mm.