JP2001328821A - Baffle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To educe defects such as wrinkles and checks at the bottom f of a parison, cords, to make the knurling and the stamp on the bottom of a bottle clear. SOLUTION: A lower forming part including a forming surface, and an upper body of a baffle are formed into different bodies, and the lower forming part is detachably attached to the lower of the body. As a result, the formation of the defects such as cords becomes difficult, and the knurling and the stamp become clear because the forming part is the different body to make the transmission of the heat from the forming part to the body difficult, and accordingly the decrease of the temperature at the bottom of the parison is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baffle which is a part of a glass bottle forming equipment and is set on a coarse mold for forming a parison and forms a bottom of the parison.

[0002]

2. Description of the Related Art An outline of a process for forming a glass bottle by a conventional blow-and-blow method will be described with reference to FIGS. 6a to 6c, a parison P as a semi-finished product is manufactured from a lump (gob) G of molten glass using a rough mold 20. In FIG. 6A, the gob G is put into the rough mold 20, and FIG.
In b, it is pressurized with compressed air from above through the baffle 1 (settle blow), and the glass enters the mouth mold 21 below the rough mold 20 to form a mouth. At this time plunger 2
3 is set at a predetermined position. In FIG. 6c, the plunger 23 is lowered, air is blown into the cavity (counter blow), and the parison P is formed by the rough mold 20 and the upper baffle 1. FIG. 7 shows the device in an intermediate state between FIGS. 6b and 6c in somewhat more detail. In the figure, the plunger 23 is set at a predetermined position and the baffle 1
Is set on the upper part of the rough mold 20. Thereafter, the plunger 23 descends and the counter blow is performed. FIG.
Then, the parison P is transferred to the finishing die 24 using the reversing device (mechanism) 31. In FIGS. 6e to 6f, a glass bottle B as a final product is formed in the finishing die 24 (final blowing), and in FIG. The glass bottle B is taken out from the finishing die 24.

FIG. 5 is a side view showing the left half of the conventional baffle 1 in a longitudinal section. The baffle 1 having a substantially cylindrical shape with a bottom is integrally formed of a casting. The upper part has a mounting part 10 for mounting to the glass bottle forming machine main body, and the lower surface has a forming surface 4 for forming the bottom of the parison. The air hole 7 communicates with the hollow portion 11, and compressed air is supplied from the air hole 7 at the time of settling blow.

[0004]

Since the conventional baffle is integrally formed by casting, there is a problem that heat of the glass is easily taken away. As a result, the temperature at the bottom of the parison decreases, the flowability of the glass deteriorates, and defects such as "streaks" and "wrinkles" tend to occur at the bottom of the finally formed glass bottle, and the knurling and engraving become unclear. I was

[0005] The present invention raises the temperature of the molding surface of the baffle to make it difficult to remove the heat of the glass, suppresses the decrease in the temperature of the bottom of the parison, and applies "streaks" or "wrinkles" to the bottom of the finally formed glass bottle. The object of the present invention is to make it difficult to cause the drawbacks described above, and to make the knurling and engraving clear.

[0006]

According to the present invention, there is provided a cylindrical shape having a bottom, a mounting portion for mounting the glass bottle forming machine on an upper portion, and a forming surface for forming a bottom portion of a parison on a lower surface. In the baffle having the baffle, the molded part 3 at the lower part of the baffle including the molding surface 4 and the upper main body 2 are formed separately, and the molded part 3 is detachably attached to the lower part of the main body 2. It is.

The present invention also relates to a main body 2 having a generally cylindrical shape and having an upper mounting portion 10 for mounting the glass bottle forming machine on the upper portion, and a molding having a bottomed cylindrical shape and forming the bottom of a parison on the lower surface. A molding part 3 having a surface 4, wherein the molding part 3 is detachably attached to a lower part of the main body 2.

In the baffle of the present invention, since the molded portion having the molding surface is formed separately from the main body, it is difficult for heat to be transmitted from the molded portion to the main body. It is also possible to easily reduce the contact area between the molded portion and the main body. For this reason,
The temperature of the molding surface is increased, the temperature drop at the bottom of the parison is reduced, defects of "streaks" and "wrinkles" at the bottom of the glass bottle are prevented, and knurling and marking can be sharpened.

Further, since the molding portion is detachable from the main body, it is possible to mold other types of glass bottles only by replacing the molding portion, and even when the molding surface is worn, only the molding portion can be formed. Can be replaced, so that the cost can be reduced.

An engaging portion 6 protruding outward from the upper portion of the molded portion 3 and an engaging portion 9 protruding inside the mounting plate 8 are engaged, and the mounting plate is connected to the main body 2 by a connecting means such as a bolt.
, The molded part 3 can be attached to the main body 2. With this configuration, the molded portion 3 can be easily attached to and detached from the main body 2, and the contact area between the main body 2 and the molded portion 3 is only the upper end surface of the molded portion 3, so that the amount of heat transmitted to the main body 2 can be further reduced. .

In this case, the engaging portion 6, the mounting plate 8 and the engaging portion 9 can be formed in a ring shape over the entire circumference.
By doing so, the molded portion 3 can be securely attached to the main body 2.

The molding part 3 can be loosely attached to the main body 2 so as to be finely movable in the vertical and horizontal directions. That is, the engaging portion between the molded portion 3 and the main body 2 is loosely engaged with "play". By allowing the molded portion 3 to be slightly movable with respect to the main body 2, the impact given to the glass at the time of mold release is reduced, so that “palm” (crack) is less likely to occur at the bottom of the parison.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. 1 is a top view of the baffle 1 of the embodiment, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is a side view of the left half of the baffle 1 of another embodiment, and FIG. It is a side view which shows the left half of the baffle 1 of an Example longitudinally.

The baffle 1 shown in FIGS. 1 and 2 comprises a main body 2 made of a casting and a molded portion 3. The main body 1 has a cylindrical shape whose lower part is widened, and the inside is a hollow part 11. The upper part has a mounting part 10 for mounting to the glass bottle forming machine 30. Four bolt holes 13 for attaching the molded portion 3 are provided near the outer peripheral portion.

The forming section 3 has a short cylindrical shape with a bottom, and the lower surface is a forming surface 4 for forming a parison bottom. Also,
Two air holes 7 communicating the inside and the outside are provided. An annular rising portion 5 is erected near the upper inner periphery, and an engaging portion 6 is formed on the outer periphery of the upper end of the rising portion 5 outward in the shape of a flange over the entire circumference.

The molded part 3 is attached to the main body 2 by an attachment plate 8, as shown in FIG. The mounting plate 6 has a thin ring shape and is divided into two. An annular engaging portion 9 is formed on the inner peripheral side of the lower end so as to protrude inward in a flange shape. Also, four screw holes for screwing the bolts 12 are formed. The inner diameter of the mounting plate 8 is slightly larger than the outer diameter of the rising part 5 of the forming part 3 so that the forming part 3 can be slightly moved (about 0.1 mm) in the horizontal direction with respect to the main body 2. Also, fine movement (0.
(About 1 mm), the thickness of the engaging portion 6 and the engaging portion 9 is determined.

In the baffle 1 shown in FIGS. 1 and 2, since the main body and the molding portion are separate bodies, the heat of the glass received on the molding surface is not easily transmitted to the main body. Further, since the portion directly in contact with the main body 2 is only the upper end surface of the molded portion 3, that is, the upper end surface of the rising portion 5, the contact area is extremely small. Therefore, the molding surface 4
In this case, the heat of the glass received by the molding is hardly transmitted to the main body, and the temperature of the molding surface 4 increases. Molding surface 4 of baffle of this embodiment
The temperature during operation was measured to be 543 ° C. The temperature of the molding surface of the conventional baffle of FIG. 5 was measured at 439 ° C. under the same conditions. Therefore, the temperature of the molding surface of the baffle of this embodiment is about 100 ° C. higher than that of the conventional one. When the conventional baffle was used, about 500 defective bottom parts occurred per million, but when the baffle of this embodiment was used, the defective bottom part did not occur. Also, the knurling and engraving on the bottom became clear.

Further, since the molding portion 3 can be finely moved in the horizontal direction and the vertical direction with respect to the main body 2, the impact given to the glass at the time of releasing the mold is reduced, and the chatter is generated on the bottom of the parison.
(Cracks) are less likely to occur.

The baffle 1 shown in FIG. 3 has a slightly different shape from the baffle shown in FIGS. Since the engaging portion 6 of the molded portion 3 is protruded from the upper end of the outer peripheral wall of the molded portion 3, the ring-shaped mounting plate 8 does not need to be divided into two.

The baffle 1 shown in FIG. 4 differs from the baffle shown in FIG. The lower part of the main body 2 is formed with a concave portion 15 into which the molded portion 3 can be fitted. The molded part 3 is fixed by the pin 14 after being press-fitted into the concave part 15 and attached to the main body 2. In the case of this embodiment, since the contact area between the main body 2 and the molding portion 3 is larger than that of the above-mentioned embodiment, the temperature of the molding surface 4 is lower, but it is about 60 ° C. higher than the conventional baffle.

In the above embodiment, the molding of the glass bottle by the blow-and-blow method has been described.
The present invention can be used in the press-and-blow method in the same manner. Further, the shapes of the baffle, the main body, the molded portion, and the like in the embodiments are, of course, merely examples.

[0022]

According to the baffle of the present invention, since the temperature of the molding surface is high, the temperature drop at the bottom of the parison is reduced, the defects of "streaks" and "wrinkles" at the bottom of the glass bottle are prevented, and knurling and marking are prevented. Can be sharpened. Also, since the molding part is detachable from the main body, it is possible to mold other types of glass bottles simply by replacing the molding part, and even if the molding surface is worn, only the molding part can be replaced. The cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a top view of a baffle according to an embodiment.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a side view showing a left half of a baffle according to another embodiment in a longitudinal section.

FIG. 4 is a side view showing a left half of a baffle according to still another embodiment in a longitudinal section.

FIG. 5 is a side view showing a left half of a conventional baffle in a longitudinal section.

FIG. 6 is an explanatory diagram of glass bottle molding by a blow and blow method.

FIG. 7 is an explanatory diagram of parison molding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Baffle 2 Main body 3 Molding part 4 Molding surface 5 Rise 6 Engagement part 7 Air hole 8 Mounting plate 9 Engagement part 10 Attachment part 11 Hollow part 12 Bolt 13 Bolt hole 14 Pin 15 Pin 15 Depression 20 Rough 21 Mold 22 Guide Ring 23 Plunger 24 Finishing mold 25 Bottom mold 30 Glass bottle forming machine 31 Mechanism

Claims (5)

[Claims] 1. A baffle having a substantially bottomed cylindrical shape, an upper portion having a mounting portion for mounting to a glass bottle forming machine main body, and a lower surface having a forming surface for forming a parison bottom portion. The baffle is characterized in that the molded part 3 at the lower part of the baffle and the main body 2 at the upper part are formed separately, and the molded part 3 is detachably attached to the lower part of the main body 2. 2. A main body 2 having a substantially cylindrical shape and an upper portion having a mounting portion 10 for mounting on a glass bottle forming machine main body, and a forming surface 4 having a bottomed cylindrical shape and forming a bottom portion of a parison on a lower surface.
A baffle, comprising: a molded portion 3 having: a molded portion 3 detachably attached to a lower portion of the main body 2. 3. The mounting plate according to claim 2, wherein the engaging portion protruding outward from the upper portion of the forming portion and the engaging portion protruding inside the mounting plate are engaged. Characterized in that the molded part 3 is attached to the main body 2 by connecting the main body 2 to the main body 2 with a connecting means such as a bolt. 4. The baffle according to claim 3, wherein the engaging portion, the mounting plate, and the engaging portion are formed in a ring shape over the entire circumference. 5. The baffle according to claim 1, wherein said molding portion is loosely attached to said main body so as to be finely movable in a vertical direction and a horizontal direction.