JP2021014392A - Apparatus and method for manufacturing glass bottle - Google Patents

Abstract

To provide an apparatus for manufacturing a glass bottle, capable of suppressing the rotation of a parison when transferring the parison from a mouth die to a finish die without spoiling the beauty of the glass bottle, and a method for manufacturing the glass bottle.SOLUTION: An apparatus 1 for manufacturing a glass bottle comprises: a mouth die 7 and coarse die 20 for molding a parison 3; and a finish die 43 for molding a glass bottle 2 from the parison. The coarse die has a first approximately cylindrical molding surface 31 for molding the neck 3B of the parison and a first depression 35 forming a projection 34, and the finish die has a second approximately cylindrical molding surface 48 for molding the neck 2B of the bottle and having a second depression 51 for receiving the projection. The width W7 of the opening end 51B of the second depression is wider than the width W1 of the opening end 35 of the first depression; the depth D2 of the second depression is equal to or more than the depth D1 of the first depression; and the width W9 of an intermediate part 51C in a predetermined depth of the second depression is set less than the width W3 of an intermediate part 35C in a predetermined depth of the first depression.SELECTED DRAWING: Figure 9

Description

The present invention relates to a glass bottle manufacturing apparatus and a method for manufacturing a glass bottle.

A blow-and-blow molding method is known as a method for molding a glass bottle. The blow-and-blow molding method involves molding a parison from a molten glass block by a mouth mold and a rough mold, holding the parison in the mouth mold and moving it to a finishing mold, and molding a glass bottle from the parison by a finishing mold. Has steps and.

In the blow-and-blow molding method, when the outer shape of the neck of the parison is circular, there is a problem that the parison rotates inside the finishing mold when the parison is handed over from the mouth mold to the finishing mold. When the parison rotates, the rough and finished parting lines shift from each other, which causes a problem that the appearance of the glass bottle is spoiled. Further, due to the rotation of the parison, the wall thickness does not become the desired wall thickness distribution, and the problem of uneven wall thickness (uneven wall thickness) occurs in the formed glass bottle. In order to solve this problem, a rough mold is used to form a convex portion on the outer peripheral surface of the neck of the parison, a concave portion is formed in the finishing mold to fit the convex portion, and the convex portion is fitted to the concave portion to rotate. A method for suppressing is known (for example, Patent Document 1).

No. 58-113729

However, there is a problem that the aesthetic appearance of the glass bottle is spoiled if the convex portion clearly remains on the neck of the glass bottle after molding. Therefore, it is desirable that the convex portion is as inconspicuous as possible.

In view of the above background, the present invention is a glass bottle manufacturing apparatus and a glass bottle capable of suppressing the rotation of the parison during delivery of the parison from the mouth mold to the finishing mold without spoiling the aesthetic appearance of the glass bottle after molding. It is an object to provide a manufacturing method of.

In order to solve the above problems, one aspect of the present invention is a mouth mold (7) and a rough mold (20) for molding a parison (3), and a finishing mold (43) for molding a glass bottle (2) from the parison. ), The rough mold has a substantially cylindrical first molding surface (31) for molding the neck portion (3B) of the parison, and the first molding surface. Has a first recess (35) that forms a convex portion (34) on the neck of the parison, the finishing mold for receiving the neck of the parison and molding the neck (2B) of the bottle. The second molded surface (48) having a substantially cylindrical shape, the second molded surface has a second concave portion (51) for receiving the convex portion, and the first portion (51B) of the open end (51B) of the second concave portion. 2 The width (W7) in the circumferential direction of the molding surface is wider than the width (W1) of the opening end (35) of the first recess in the circumferential direction of the first molding surface, and the depth (D2) of the second recess. Is equal to or greater than the depth (D1) of the first recess, and the width (W9) of the intermediate portion (51C) at a predetermined depth of the second recess in the circumferential direction of the second molding surface is the first. The width (W3) of the intermediate portion (35C) at a predetermined depth of the recess in the circumferential direction of the first molding surface is set to be narrower.

According to this aspect, it is possible to suppress the rotation of the parison at the time of delivery of the parison from the mouth mold to the finishing mold without spoiling the aesthetic appearance of the glass bottle after molding. Since the convex portion formed on the neck portion of the parison by the first concave portion abuts on the wall surface of the second concave portion at the intermediate portion in the depth direction, the rotation of the parison with respect to the finishing mold can be suppressed. Further, since the width of the opening end of the second concave portion is wider than the width of the base portion of the convex portion, the base portion of the convex portion spreads along the shape of the second concave portion, and the boundary between the convex portion and the neck portion becomes unclear.

In the above aspect, the predetermined depth may be set to a value of 20% or more and 80% or less when the deepest portion of the second recess is 100%.

In the above aspect, the open end of the second recess may be formed on a curved surface that smoothly connects the wall surface of the second recess and the second molded surface.

According to this aspect, when the glass bottle is molded from the parison, the base of the convex portion is formed into a shape along the opening end of the second concave portion formed on the curved surface. Therefore, the boundary between the convex portion and the neck portion can be further obscured.

In the above aspect, the first recess may be formed in a flat hemispherical shape.

According to this aspect, the convex portion can be made inconspicuous in the neck portion.

In the above aspect, when the parison is arranged in the finishing mold, the second concave portion abuts on the intermediate portion in the height direction of the convex portion in the intermediate portion in the depth direction, while the second concave portion abuts on the intermediate portion in the height direction of the convex portion. It is preferable that the shape is set so as to form a gap (59) with the base end of the convex portion.

In the above aspect, when the parison is arranged in the finishing mold, the second concave portion abuts on the convex portion within a range of 10% or more and 100% or less from the opening end in the depth direction, and has a depth. It is preferable that the shape is set so as not to abut on the convex portion within a range of 0% or more and less than 10% from the opening end in the direction.

In the above aspect, the width of the opening end of the second recess in the circumferential direction of the second molding surface is preferably 10 times or more and 25 times or less with respect to the depth of the second recess.

According to this aspect, the convex portion can be made inconspicuous in the neck portion.

Another aspect of the present invention is a glass bottle using a mouth mold (7) and a rough mold (20) for molding the parison (3) and a finishing mold (43) for molding the glass bottle (2) from the parison. In order to regulate the step of forming a convex portion (34) on the outer surface of the neck portion (3B) of the parison by the rough mold and the rotation of the parison with respect to the finishing mold, the convex portion is formed. It is received by the concave portion (51) formed in the finishing mold, and the outer surface of the intermediate portion in the height direction of the convex portion is brought into contact with the wall surface of the concave portion, while the outer surface of the base portion of the convex portion and the opening of the concave portion. It has a step of forming a gap (59) with the end.

According to this aspect, it is possible to suppress the rotation of the parison at the time of delivery of the parison from the mouth mold to the finishing mold without spoiling the aesthetic appearance of the glass bottle after molding.

According to the present invention, a glass bottle manufacturing apparatus and a glass bottle manufacturing method capable of suppressing the rotation of the parison during delivery of the parison from the mouth mold to the finishing mold without spoiling the aesthetic appearance of the glass bottle after molding. Can be provided.

Explanatory drawing showing a glass bottle manufacturing apparatus Sectional view showing rough mold, mouth mold, and baffle in the parison molding process Cross-sectional view showing the main part of the rough mold in an enlarged manner (A) Vertical sectional view of the first concave portion, (B) Horizontal sectional view of the first concave portion (BB sectional view of FIG. 4 (A)) (A) Side view of the parison, (B) BB sectional view of FIG. 5 (A), (C) CC sectional view of FIG. 5 (A). Cross-sectional view showing mouth mold, finish mold, and bottom mold in the glass bottle molding process Cross-sectional view showing the main part of the molding mold in an enlarged manner (A) Vertical sectional view of the second concave portion, (B) Horizontal sectional view of the second concave portion (BB sectional view of FIG. 7A) (A) Explanatory drawing showing the shapes of the first concave portion and the second concave portion in comparison, (B) Explanatory drawing showing the shapes of the second concave portion and the convex portion in comparison, and (C) after molding the glass bottle. Explanatory drawing showing the shape of the convex portion Side view showing the shape of the convex portion according to the modified example

Hereinafter, embodiments of the present invention will be described. The glass bottle manufacturing apparatus 1 is an apparatus for manufacturing a glass bottle 2 from a molten glass ingot (gob) by blow-and-blow molding. The glass bottle manufacturing apparatus 1 executes a step of molding the parison 3 from the molten glass block and a step of molding the glass bottle 2 from the parison 3.

As shown in FIG. 1, the glass bottle manufacturing apparatus 1 has an arm 6 rotatably supported by a base 5. The arm 6 has a rotation center extending in the horizontal direction, and rotates between an initial position extending in one direction in the horizontal direction from the rotation center and an inverted position rotated by 180 ° with respect to the initial position. At the tip of the arm 6, a first neck ring 8 and a second neck ring 9 forming a part of the mouth mold 7 are supported along the first axis X1 extending vertically.

As shown in FIG. 2, the first neck ring 8 and the second neck ring 9 are arranged above the tip of the arm 6 when the arm 6 is in the initial position. The first neck ring 8 and the second neck ring 9 have a mating surface extending along the first axis X1 and abut each other on the mating surface. The first axis X1 forms the axis of the mouth mold 7. The first neck ring 8 and the second neck ring 9 are supported by the arm 6 so as to be slidably movable in a direction orthogonal to the mating surface, and can be retracted in a direction away from the first axis X1.

The mating surfaces of the first neck ring 8 and the second neck ring 9 have mold surfaces 8A and 9A corresponding to the outer peripheral surface of the mouth portion 3A of the parison 3 (the mouth portion 2A of the glass bottle 2) along the first axis X1. Is formed. Grooves corresponding to the screw portion 11 and the skirt portion 12 of the mouth portion 3A of the parison 3 are formed on the mold surfaces 8A and 9A. As shown in FIG. 5, the skirt portion 12 is a ridge that is arranged below the screw portion 11 in the mouth portion 3A and extends in the circumferential direction of the mouth portion 3A. The cavity of the mouth mold 7 formed by the mold surfaces 8A and 9A reaches the upper ends of the first neck ring 8 and the second neck ring 9 and is between the lower portions of the first neck ring 8 and the second neck ring 9. It is connected to the formed receiving hole 16. The receiving hole 16 is open at the lower ends of the first neck ring 8 and the second neck ring 9.

The mouth mold 7 has a guide ring 17, a plunger 18, and a thimble 19 (sleeve) in addition to the first neck ring 8 and the second neck ring 9. The guide ring 17 is formed in a ring shape. The thimble 19 is formed in a cylindrical shape and is coaxially arranged below the guide ring 17. The plunger 18 is formed in a columnar shape and is coaxially arranged inside the guide ring 17 and the thimble 19. The plunger 18 is supported by the guide ring 17 and the thimble 19 so as to be able to move forward and backward in the axial direction of the guide ring 17. The guide ring 17 is coaxially held between the first neck ring 8 and the second neck ring 9. The guide ring 17 is also supported between the first neck ring 8 and the second neck ring 9 when the first neck ring 8 and the second neck ring 9 are separated from each other. The plunger 18 and thimble 19 are arranged in the receiving hole 16 of the mouth mold 7 when the arm 6 is in the initial position, and are arranged coaxially with the first axis X1. The plunger 18 rushes between the mold surfaces 8A and 9A of the first neck ring 8 and the second neck ring 9 at the protruding position protruding from the guide ring 17. When the arm 6 moves from the initial position to the inverted position, the plunger 18 and thimble 19 stay in place and separate from the first neck ring 8, the second neck ring 9, and the guide ring 17.

A rough mold 20 is arranged above each mouth mold 7 along the first axis X1. The rough mold 20 has a first rough mold 21 and a second rough mold 22 that come into contact with each other on a mating surface extending vertically along the first axis X1. The first rough mold 21 and the second rough mold 22 move laterally and are separable from each other. The first rough mold 21 and the second rough mold 22 are arranged so as to sandwich the first neck ring 8 and the second neck ring 9 of the mouth mold 7 from the side at the lower end portion. The mating surfaces are arranged along the first axis X1 in a state where the first rough mold 21 and the second rough mold 22 sandwich the first neck ring 8 and the second neck ring 9 and the mating surfaces are in contact with each other.

The first rough mold 21 and the second rough mold 22 form concave mold surfaces 21A and 22A on the mating surface corresponding to the shape of the side portion of the parison 3. The cavity of the rough mold 20 defined by the left and right mold surfaces 21A and 22A extends along the first axis X1 and connects to the cavity of the mouth mold 7 at the lower end, and the first rough mold 21 and the second rough mold at the upper end. It is open on the upper surface of 22. The upper end opening of the cavity of the rough mold 20 is closed by the baffle 25 so as to be openable and closable. A mold surface corresponding to the outer surface of the bottom of the parison 3 is formed on the lower surface of the baffle 25.

The mold surfaces 21A and 22A of the rough mold 20 include a rough neck molding surface 31 (first molding surface) corresponding to the neck portion 3B of the parison 3. The rough neck forming surface 31 is formed on a cylindrical surface centered on the first axis X1. The rough neck forming surface 31 may be formed on a cylindrical surface having the same diameter, or may be formed on a cylindrical surface (conical surface) whose outer diameter gradually increases upward. The rough neck forming surface 31 is provided at the lower ends of the mold surfaces 21A and 22A of the rough mold 20 and is connected to the mold surfaces 8A and 9A of the mouth mold 7.

As shown in FIGS. 2 to 4, the rough neck forming surface 31 has at least one first concave portion 35 for forming a convex portion 34 on the outer surface of the neck portion 3B of the parison 3. The number of the first recesses 35 is preferably a plurality. When there is one first recess 35, the first recess 35 may be provided on either the mold surface 21A or 22A. The wall surface 35A of the first recess 35 is preferably formed on a curved surface. The first recess 35 is formed in a hemispherical shape, more preferably a flat hemispherical shape. The first recess 35 is recessed in a direction orthogonal to the mating surface of the rough mold 20.

The width W1 in the circumferential direction (circumferential direction around the first axis X1) of the rough neck forming surface 31 of the opening end 35B of the first recess 35, and the rough neck forming surface 31 of the opening end 35B of the first recess 35. Each of the widths W2 in the longitudinal direction (direction along the first axis X1) is set to be larger than the depth D1 of the first recess 35. For example, each of the width W1 and the width W2 is preferably 10 times or more and 25 times or less with respect to the depth D1. When the shape of the outer edge of the first recess 35 is a perfect circle, the width W1 and the width W2 are equal and correspond to the diameter of the first recess 35.

When the first recess 35 is hemispherical, the curvature of the wall surface 35A of the first recess 35 is preferably 4 mm or more and 7 mm or less. Further, the diameter of the opening end 35B of the first recess 35 is preferably, for example, 3 mm or more and 20 mm or less.

The open end 35B of the first recess 35 is formed on a curved surface that smoothly connects the wall surface 35A of the first recess 35 and the rough neck forming surface 31. The opening end 35B is provided in an annular shape along the edge of the first recess 35. The curvature of the opening end 35B is preferably 10 mm or more and 40 mm or less, and more preferably 15 mm or more and 30 mm or less.

The first recess 35 is preferably provided at the end of the rough neck forming surface 31 on the side of the mouth mold 7. The distance between the center of the first recess 35 and the end of the rough neck forming surface 31 is, for example, preferably 3 mm or more and 10 mm or less. The open end 35B of the first recess 35 may reach the end of the rough neck forming surface 31.

The step of forming the parison 3 from the molten glass block is carried out in a state where the arm 6 is arranged at the initial position and the mouth mold 7 and the rough mold 20 are set. In the state where the mouth mold 7 is set, the first neck ring 8 and the second neck ring 9 are in contact with each other at the mating surfaces, and the guide ring 17 and the plunger 18 are arranged in the receiving hole 16 of the mouth mold 7. In this state, the tip of the plunger 18 is arranged in the cavity of the mouth mold 7. In the state where the rough mold 20 is set, the first rough mold 21 and the second rough mold 22 are in contact with each other at the mating surface, and the first neck ring 8 and the second neck ring 9 are sandwiched from the side. In this state, the cavity of the rough mold 20 is connected to the cavity of the mouth mold 7. The baffle 25 is located at a retracted position away from the upper end of the rough mold 20.

After the molten glass block is supplied to the space of the rough mold 20, the baffle 25 moves to the upper end portion of the rough mold 20 and closes the upper end opening of the rough mold 20. Next, compressed air is supplied to the upper part of the space of the coarse mold 20 through the baffle 25, and the molten glass block is pressed against the mouth mold 7 to form the mouth portion 3A of the parison 3 (glass bottle 2). At this time, a screw portion 11 and a skirt portion 12 are formed on the outer peripheral surface of the mouth portion 3A of the parison 3.

Next, the plunger 18 of the mouth mold 7 retracts with respect to the first neck ring 8 and the second neck ring 9, and a space is formed inside the mouth portion 3A of the parison 3. Then, compressed air is supplied to the space inside the mouth portion 3A from the gap between the first neck ring 8 and the second neck ring 9 and the plunger 18, the molten glass block expands, and the molten glass is formed in the rough mold 20 and the baffle 25. The mass is pressed down to form the sides and bottom of the parison 3. As a result, the parison 3 is formed. At this time, the molten glass gob enters the first concave portion 35, and the convex portion 34 is formed on the neck portion 3B of the parison 3.

As shown in FIG. 5, the convex portion 34 is formed in a shape corresponding to the shape of the first concave portion 35. The convex portion 34 is formed in a hemispherical shape, more preferably a flat hemispherical shape. The width W4 of the base 34A of the convex portion 34 in the circumferential direction (circumferential direction centered on the first axis X1) is equal to the width W1 of the first concave portion 35, and the length of the neck 3B of the base 34A of the convex portion 34. The width W5 in the direction (direction along the first axis X1) is equal to the width W2 of the first recess 35. Further, the height H1 of the convex portion 34 is equal to the depth D1 of the first concave portion 35.

Next, the baffle 25 is retracted from the rough mold 20 and the rough mold 20 is opened to expose the parison 3. In this state, the parison 3 is sandwiched between the first neck ring 8 and the second neck ring 9 at the mouth portion 3A. Then, as the arm 6 moves from the initial position to the inverted position, the parison 3 is inverted so that the mouth portion 3A is located at the upper end, and is suspended from the first neck ring 8 and the second neck ring 9. .. When the arm 6 is in the inverted position, the first neck ring 8, the second neck ring 9 and the guide ring 17 are arranged along the second axis X2. The plunger 18 and thimble 19 remain in their initial positions and separate from the first neck ring 8 and the second neck ring 9.

As shown in FIGS. 1 and 6, a distributor plate 41 is provided below the mouth mold 7 in the inverted position on the base 5. A bottom mold 42 for forming the bottom of the glass bottle 2 is arranged on the upper surface of the distributor plate 41.

A finishing mold 43 is arranged above the bottom mold 42. The bottom mold 42 and the finishing mold 43 are arranged along the second axis X2. The finishing die 43 has a first finishing die 44 and a second finishing die 45 that come into contact with each other on a mating surface extending vertically along the second axis X2.

The first finishing die 44 and the second finishing die 45 are arranged so as to sandwich the bottom die 42 from the side at the lower end portion. The first finishing mold 44 and the second finishing mold 45 have mold surfaces 44A and 45A recessed in the mating surface corresponding to the shape of the side portion of the glass bottle 2. The cavities of the finishing mold 43 defined by the left and right mold surfaces 44A and 45A are open to the upper and lower ends of the first finishing mold 44 and the second finishing mold 45 along the second axis X2. The lower end of the cavity of the finishing mold 43 is closed by the bottom mold 42.

The mold surfaces 44A and 45A of the finishing mold 43 receive the neck portion 3B of the parison 3 and have a finishing mold neck molding surface 48 (second molding surface) for molding the neck portion 2B of the glass bottle 2. The finish die neck forming surface 48 is formed on a cylindrical surface centered on the second axis X2. The finishing die neck forming surface 48 may be formed on a cylindrical surface having the same diameter, or may be formed on a cylindrical surface (conical surface) whose diameter gradually increases downward (bottom mold 42 side). The finishing die neck forming surface 48 is provided at the upper end portion of the die surfaces 44A and 45A of the finishing die 43. A part of the finished neck forming surface 48 is set to have a diameter equal to the corresponding portion of the rough neck forming surface 31. As a result, the neck portion 3B of the parison 3 formed by the rough neck forming surface 31 is fitted into the space formed by the finishing die neck forming surface 48, and the movement in the direction orthogonal to the second axis X2 is restricted. Orthogonal.

As shown in FIGS. 6 and 7, the finished neck forming surface 48 has at least one second recess 51 for receiving the protrusion 34 projecting from the neck 3B of the parison 3. The number of the second recesses 51 is set to be equal to the number of the first recesses 35. When there is one second recess 51, the second recess 51 may be provided on either the mold surface 44A or 45A. The wall surface 51A of the second recess 51 is preferably formed on a curved surface. The second recess 51 is formed in a hemispherical shape, more preferably a flat hemispherical shape. The second recess 51 is recessed in a direction orthogonal to the mating surface of the finishing die 43.

The width W7 in the circumferential direction (circumferential direction around the second axis X2) of the finished neck forming surface 48 of the opening end 51B of the second recess 51, and the finishing die neck forming surface 48 of the opening end 51B of the second recess 51. Each of the widths W8 in the longitudinal direction (direction along the second axis X2) is set to be larger than the depth D2 of the second recess 51. For example, each of the width W7 and the width W8 is preferably 10 times or more and 25 times or less with respect to the depth D2. When the shape of the outer edge of the second recess 51 is a perfect circle, the width W7 and the width W8 are equal and correspond to the diameter of the second recess 51.

When the second recess 51 is hemispherical, the curvature of the wall surface 51A of the second recess 51 is preferably 4 mm or more and 7 mm or less. Further, the diameter of the opening end 51B of the second recess 51 is preferably, for example, 3 mm or more and 20 mm or less.

The open end 51B of the second recess 51 is formed on a curved surface that smoothly connects the wall surface 51A of the second recess 51 and the finished neck forming surface 48. The opening end 51B is provided in an annular shape along the edge of the second recess 51. The curvature of the opening end 51B is preferably 10 mm or more and 40 mm or less, and more preferably 15 mm or more and 30 mm or less.

The position of the second recess 51 with respect to the finished neck forming surface 48 is set corresponding to the position of the first recess 35 with respect to the rough neck forming surface 31. The distance between the center of the second recess 51 and the end of the finished neck forming surface 48 is, for example, preferably 3 mm or more and 10 mm or less. The edge of the open end of the second recess 51 may reach the end of the finished neck forming surface 48.

FIG. 9 is an explanatory view showing the shapes of the first concave portion 35, the second concave portion 51, and the convex portion 34, and the depth (height) is enlarged with respect to the width for the sake of explanation. As shown in FIG. 9A, the width W7 in the circumferential direction of the finished neck forming surface 48 of the opening end 51B of the second recess 51 is the circumference of the rough neck forming surface 31 of the opening end 35B of the first recess 35. It is set wider than the width W1 in the direction. Although not shown, the width W8 of the opening end 51B of the second recess 51 in the direction along the second axis X2 is wider than the width W2 of the opening end 35B of the first recess 35 in the direction along the first axis X1. It is set. Further, when the shapes of the opening edges of the first recess 35 and the second recess 51 are perfect circles, the diameter of the opening edge of the second recess 51 is set to be larger than the diameter of the opening edge of the first recess 35.

The depth D2 of the second recess 51 is set to be equal to or higher than the depth D1 of the first recess 35. That is, the depth D2 of the second recess 51 may be the same as the depth D1 of the first recess 35, and the depth D2 of the second recess 51 may be set deeper than the depth D1 of the first recess 35. Good.

The width W9 in the circumferential direction of the finished neck forming surface 48 of the intermediate portion 51C at a predetermined depth of the second recess 51 is the circumference of the rough neck forming surface 31 of the intermediate portion 35C at a predetermined depth of the first recess 35. It is set narrower than the width W3 in the direction. Here, the predetermined depth may be set to a value of 20% or more and 80% or less when the deepest portion of the second recess 51 is 100%. In the present embodiment, the predetermined depth is set to a value of 50% (= D2 / 2) when the deepest portion of the second recess 51 is 100%. For example, the intermediate portion 51C of the second recess 51 may have a bulging portion that bulges inward of the second recess 51 with respect to the arcuate base surface forming the wall surface 51A. Alternatively, the intermediate portion 35C of the first recess 35 may have a recess recessed outside the first recess 35 with respect to the arcuate base surface forming the wall surface 35A.

The second recess 51 is preferably provided at the end of the finishing mold neck forming surface 48 on the mouth mold 7 side. The distance between the center of the second recess 51 and the end of the finished neck forming surface 48 is, for example, preferably 3 mm or more and 10 mm or less. Further, the upper portion of the opening end 51B of the second recess 51 is connected to the end portion of the finishing die neck forming surface 48 via the extension portion 55. The extension portion 55 is a recess formed in the finishing die neck molding surface 48, has the same depth as the second recess 51, and has the same width as the second recess 51 in the circumferential direction of the finishing die neck molding surface 48. ..

The step of forming the glass bottle 2 from the parison 3 is carried out from a state in which the arm 6 is arranged in the inverted position and the parison 3 is suspended above the bottom mold 42 by the mouth mold 7. First, the first finishing die 44 and the second finishing die 45 move from the retracted position separated from each other to the used position where they abut on each mating surface, and receive the parison 3 in the cavity of the finishing die 43. At this time, the neck portion 3B of the parison 3 is received between the finishing mold neck forming surfaces 48. Since a part of the finished neck forming surface 48 is set to have a diameter equal to the corresponding portion of the rough neck forming surface 31, the neck 3B of the parison 3 formed by the rough neck forming surface 31 is a finishing die. It fits into the space formed by the neck forming surface 48, and movement in the direction orthogonal to the second axis X2 is restricted. Further, the convex portion 34 is received by the second concave portion 51.

As shown in FIG. 9B, due to the difference in shape between the first concave portion 35 and the second concave portion 51, the convex portion 34 is received by the second concave portion 51, and the convex portion 34 is predetermined. The intermediate portion 34B at the height (height corresponding to a depth of 50% of the second concave portion 51) abuts on the intermediate portion 51C in the depth direction of the second concave portion 51, and the parison 3 finishes with respect to the finishing mold 43. The rotation of the mold neck forming surface 48 in the circumferential direction (circumferential direction around the second axis X2) is suppressed. At this time, it is preferable that the intermediate portion 34B of the convex portion 34 is pushed by the intermediate portion 51C of the second concave portion 51 and deformed. As shown in FIG. 9C, the contact portions between the intermediate portion 34B of the convex portion 34 and the intermediate portion 51C of the second concave portion 51 are arranged on both the left and right sides with respect to the center (deepest portion) of the second concave portion 51. Has been done. Further, the contact portion may be formed on the lower side with respect to the center (deepest portion) of the second recess 51.

Further, as shown in FIG. 9B, a gap 59 is formed between the edge portion of the second concave portion 51 on the opening end side and the base portion 34A of the convex portion 34. The center (deepest portion) of the second concave portion 51 and the tip of the convex portion 34 may come into contact with each other, and a space is formed between the center (deepest portion) of the second concave portion 51 and the tip of the convex portion 34. May be good.

Next, the first neck ring 8 and the second neck ring 9 constituting the mouth mold 7 are separated from each other, and the mouth mold 7 releases the mouth portion 3A of the parison 3. As a result, the parison 3 is handed over from the mouth mold 7 to the finishing mold 43. At this time, the parison 3 falls along the second axis X2 until the skirt portion 12 comes into contact with the end portion of the finishing mold 43. The fall distance of the parison 3 is preferably, for example, about 1 mm. At this time, since the convex portion 34 is received in the second concave portion 51 and is in contact with the wall surface 51A of the second concave portion 51, the rotation of the parison 3 with respect to the finishing mold 43 about the second axis X2 is suppressed. .. In a state where the parison 3 has fallen with respect to the finishing mold 43, the contact portion and the gap 59 between the second concave portion 51 and the convex portion 34 remain.

Next, an air supply pipe (not shown) rushes into the mouth portion 3A of the parison 3 and supplies compressed air from the air supply pipe to the inside of the parison 3. As a result, the parison 3 expands, and the parison 3 is pressed against the finishing mold 43 and the bottom mold 42 to form the side portion and the bottom portion of the glass bottle 2. As a result, the glass bottle 2 is formed. At this time, the neck portion 3B of the parison 3 expands and is pressed against the finished neck forming surface 48. Further, the peripheral portion of the convex portion 34 in the base portion 34A and the neck portion 3B of the convex portion 34 is pressed against the wall surface 51A of the second concave portion 51. As a result, as shown in FIG. 9C, the base portion 34A of the convex portion 34 is formed into a shape along the opening end 51B of the second concave portion 51, the width becomes wider, and the shape of the boundary becomes unclear. Become. That is, the angle formed by the outer edge of the convex portion 34 and the surface of the neck portion 3B becomes smaller, and the outer edge of the convex portion 34 is smoothly connected to the surface of the neck portion 3B. As a result, the convex portion 34 can be made inconspicuous in the molded glass bottle 2. Although the temperature of the neck portion 3B of the parison 3 is lower than that of the body portion, it is pushed by the compressed air and deforms along the finished neck forming surface 48. The air in the gap 59 may be discharged to the outside of the finishing mold 43 through the extension portion 55.

Next, the air supply pipe retracts from the mouth portion 3A, and the first finishing die 44 and the second finishing die 45 separate from each other to release the molded glass bottle 2. The glass bottle 2 placed on the mold surface of the bottom mold 42 is gripped by the clamp at the mouth portion 3A and moved to the next step. After that, the arm 6 moves from the inverted position to the initial position, and the mouth mold 7 and the rough mold 20 are set in the initial state in which the molten glass ingot can be accepted.

According to the above configuration, the rotation of the parison 3 at the time of delivery of the parison 3 from the mouth mold 7 to the finishing mold 43 can be suppressed without spoiling the aesthetic appearance of the glass bottle 2 after molding. Since the convex portion 34 abuts on the wall surface 51A of the second concave portion 51 at the intermediate portion 34B in the height direction, the rotation of the parison 3 with respect to the finishing mold 43 can be suppressed. Further, since the width of the opening end 51B of the second concave portion 51 is wider than the width of the base portion 34A of the convex portion 34, the base portion 34A of the convex portion 34 spreads along the shape of the second concave portion 51, and the convex portion 34 and the neck portion 3B. The boundary with and becomes unclear.

When the parison 3 is arranged on the finishing mold 43, the second concave portion 51 comes into contact with the intermediate portion 34B in the height direction of the convex portion 34 at the intermediate portion 51C in the depth direction, while the convex portion 34 at the opening end 51B. The shape is set so as to form a gap 59 with the base portion 34A of the above. Therefore, when the glass bottle 2 is molded from the parison 3, the base portion 34A of the convex portion 34 can expand toward the gap 59, and the boundary between the convex portion 34 and the neck portion 3B becomes unclear. When the parison 3 is arranged on the finishing mold 43, the second concave portion 51 abuts on the convex portion 34 in the range of 20% or more and 80% or less from the opening end 51B in the depth direction, and the opening end in the depth direction. It is preferable that the shape is set so as not to abut on the convex portion 34 within the range of 0% or more and less than 20% from 51B. According to this configuration, the second concave portion 51 and the convex portion 34 can be brought into contact with each other more reliably, and the gap 59 can be formed more reliably.

Since the opening edge of the second concave portion 51 has a curved surface that smoothly connects to the molding surface, the base portion 34A of the convex portion 34 expands along the curved surface, and the convex portion 34 and the surface of the neck portion 2B in the glass bottle 2 The boundaries of are even more obscure.

Since the first concave portion 35 is formed in a flat hemispherical shape, the convex portion 34 is formed in a flat hemispherical shape. Therefore, the convex portion 34 becomes relatively inconspicuous in the neck portion 2B of the glass bottle 2.

The glass bottle manufacturing apparatus 1 according to the above embodiment has a step of forming a convex portion 34 on the outer surface of the neck portion 3B of the parison 3 by the rough mold 20, and a convex portion in order to regulate the rotation of the parison 3 with respect to the finishing mold 43. The 34 is received by the second concave portion 51 formed in the finishing mold 43, and the outer surface of the intermediate portion 34B in the height direction of the convex portion 34 is brought into contact with the wall surface 51A of the second concave portion 51, while the base portion 34A of the convex portion 34 A method for manufacturing a glass bottle having a step of forming a gap between the outer surface of the glass bottle and the opening end 51B of the second recess 51 can be carried out.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. For example, the shape of the first recess 35 is not limited to a circular shape, and various shapes may be applied. As shown in FIG. 10, the shape of the convex portion 34 formed by the first concave portion 35 is, for example, a quadrangular upper portion and a semicircular shape extending downward from the lower edge of the upper portion when viewed from the side. It may have a shape having a lower portion of the. Also in this case, the width W3 of the rough neck forming surface 31 of the intermediate portion 35C at the predetermined depth of the first recess 35 in the circumferential direction is the finish die neck of the intermediate portion 51C in the predetermined depth direction of the second recess 51. It is preferable that the width is set to be larger than the width W9 in the circumferential direction of the molding surface 48. Further, the width W1 in the circumferential direction of the rough neck forming surface 31 of the opening end 35B of the first recess 35 is set smaller than the width W7 in the circumferential direction of the finishing die neck forming surface 48 of the opening end 51B of the second recess 51. It should be done.

1: Glass bottle manufacturing equipment 2: Glass bottle 2A: Mouth 2B: Neck 3: Parison 3A: Mouth 3B: Neck 7: Mouth mold 20: Rough mold 31: Rough mold neck molding surface (first molding surface)
34: Convex portion 34A: Base end portion 34B: Intermediate portion 35: First concave portion 35A: Wall surface 35B: Opening end 35C: Intermediate portion 43: Finishing mold 48: Finishing mold neck molding surface 51: Second concave portion 51A: Wall surface 51B: Open end 51C: Intermediate part 59: Gap

Claims (8)

A glass bottle manufacturing apparatus having a mouth mold and a rough mold for molding a parison and a finishing mold for molding a glass bottle from the parison.
The rough mold has a substantially cylindrical first molding surface that forms the neck of the parison, and the first molding surface has a first recess that forms a convex portion on the neck of the parison.
The finishing mold has a substantially cylindrical second molding surface for molding the neck of the bottle while receiving the neck of the parison, and the second molding surface has a second concave portion for receiving the convex portion. Have,
The width of the opening end of the second recess in the circumferential direction of the second molding surface is wider than the width of the opening end of the first recess in the circumferential direction of the first molding surface.
The depth of the second recess is equal to or greater than the depth of the first recess.
The width of the intermediate portion at a predetermined depth of the second recess in the circumferential direction of the second molded surface is larger than the width of the intermediate portion of the first recess at the predetermined depth of the first molded surface in the circumferential direction. Glass bottle manufacturing equipment that is also narrowly set. The glass bottle manufacturing apparatus according to claim 1, wherein the predetermined depth is set to a value of 20% or more and 80% or less when the deepest portion of the second recess is 100%. The glass bottle manufacturing apparatus according to claim 1 or 2, wherein the open end of the second recess is formed on a curved surface that smoothly connects the wall surface of the second recess and the second molding surface. The glass bottle manufacturing apparatus according to any one of claims 1 to 3, wherein the first recess is formed in a flat hemispherical shape. Any one of claims 1 to 4, wherein the width of the opening end of the second recess in the circumferential direction is 10 times or more and 25 times or less the depth of the second recess. The glass bottle manufacturing apparatus according to the item. When the parison is arranged in the finishing mold, the second concave portion abuts on the intermediate portion in the height direction of the convex portion in the intermediate portion in the depth direction, while the base end of the convex portion is in contact with the intermediate portion in the height direction of the convex portion. The glass bottle manufacturing apparatus according to any one of claims 1 to 5, wherein the shape is set so as to form a gap between the two. When the parison is arranged in the finishing mold, the second concave portion abuts on the convex portion within a range of 20% or more and 80% or less from the opening end in the depth direction, and from the opening end in the depth direction. The glass bottle manufacturing apparatus according to claim 6, wherein the shape is set so as not to abut on the convex portion within a range of 0% or more and less than 20%. A method for manufacturing a glass bottle using a mouth mold and a rough mold for molding a parison and a finishing mold for molding a glass bottle from the parison.
The step of forming a convex portion on the outer surface of the neck portion of the parison by the rough mold,
In order to regulate the rotation of the parison with respect to the finishing mold, the convex portion is received by the concave portion formed in the finishing mold, and the outer surface of the intermediate portion in the height direction of the convex portion is brought into contact with the wall surface of the concave portion. On the other hand, a method for manufacturing a glass bottle having a step of forming a gap between the outer surface of the base portion of the convex portion and the open end of the concave portion.

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