JP2024051241A - Blow-and-blow molding device - Google Patents

Abstract

To provide a blow-and-blow molding device that can arrange a baffle mark radially inside a bottle.SOLUTION: A blow-and-blow molding device 1 has a rough mold 4, a funnel 5 and a baffle 6. A lower part of the baffle has a baffle-side mold surface 41, a first outer peripheral surface 42, a first figure top surface 43, and a second outer peripheral surface 44 which are arranged in order from below. The second outer peripheral surface is formed into a conical surface which becomes narrower in width downward, and can come into surface contact with an inner peripheral surface upper part 29 of the funnel. The first figure top surface is formed into an annular plane and connected to a lower end of the second outer peripheral surface at its outer peripheral edge, and can come into surface contact with a second wall surface 24. The first outer peripheral surface is formed into a conical surface which extends downward from an inner peripheral edge of the first figure top surface and becomes narrower in width downward, and can come into surface contact with a third wall surface 25. The baffle-side mold surface is connected to a lower end edge of the first outer peripheral surface. The baffle has a compressed air path 51 which is open on the first figure top surface.SELECTED DRAWING: Figure 2

Description

The present invention relates to a blow-and-blow molding apparatus for forming a parison from a glass gob.

A blow-and-blow molding device for molding a parison from a glass gob is known. The molding device has a pair of rough molds that form a cavity on the mating surface, a mouth mold that closes the lower end of the cavity and forms the mouth of the parison, a funnel that is connected to the upper end of the cavity and guides the gob to fall into the cavity, and a baffle that is connected to the upper end of the cavity or the upper end of the funnel. An air passage is formed in the baffle for supplying settling air. When the baffle is connected to the funnel, the end of the air passage is connected to the inside of the funnel and settling air is supplied to the cavity. On the other hand, when the baffle is directly connected to the rough mold, the end of the air passage is blocked by the rough mold. In this state, the lower end of the baffle forms a mold surface that corresponds to the bottom of the parison.

Patent No. 2993874

In the blow-and-blow molding device according to the above patent document, the baffle and the funnel are connected by surface contact of the tapered baffle-side abutment surface provided on the outer periphery of the lower part of the baffle with the tapered funnel-side abutment surface provided on the inner periphery of the upper part of the funnel. The baffle-side abutment surface is connected to the rough mold by surface contact of the rough mold-side abutment surface provided on the upper end of the rough mold. The funnel-side abutment surface has a diameter according to the diameter of the baffle-side abutment surface and the diameter of the rough mold-side abutment surface. The connection part between the mold surface of the baffle and the mold surface of the rough mold is located on the outer periphery of the parison. The connection part between the mold surface of the baffle and the mold surface of the rough mold remains as a baffle mark on the glass bottle after molding. In order to position the baffle mark radially inside the bottom of the bottle, there is a method of reducing the diameter of the mold surface of the baffle and the mold surface of the rough mold. However, since the connection part between the mold surface of the baffle and the mold surface of the rough mold is an acute angle, there is a risk that the connection part will be chipped or worn. As a result, there is a risk of defects such as overhanging near the baffle mark. For this reason, with conventional blow-and-blow molding equipment, it is difficult to position the baffle mark radially inward on the bottle.

In view of the above background, the present invention aims to provide a blow and blow molding device that can position baffle marks radially inward of a bottle.

In order to solve the above problems, one aspect of the present invention is a blow-and-blow molding apparatus (1) for molding a parison (P) from a glass gob (G) having a rough mold (4), a funnel (5), and a baffle (6), the rough mold having a rough mold cavity (14) formed inside the rough mold and an upper connection hole (16) extending from the upper end of the rough mold cavity to the upper end surface of the rough mold, the upper connection hole being connected to a first wall surface (23), a second wall surface ( The funnel is formed by a first wall surface (24), and a third wall surface (25), the first wall surface extending downward from the upper end surface of the rough mold and formed into a conical surface narrowing downward, the second wall surface formed into an upwardly facing annular plane and connected to the lower end of the first wall surface at its outer circumferential edge, the third wall surface extending downward from the inner circumferential edge of the second wall surface to the upper end of the rough mold cavity portion and formed into a conical surface narrowing downward, and the funnel is formed into a cylindrical shape open at the top and bottom. The funnel has a lower end surface (27) capable of surface contact with the second wall surface, an outer peripheral surface lower portion (28) capable of surface contact with the first wall surface, and an inner peripheral surface upper portion (29) having the same inclination as the first wall surface, and the lower portion of the baffle has a baffle side mold surface (41), a first outer peripheral surface (42), a first top surface (43), and a second outer peripheral surface (44) arranged in this order from the bottom, and the second outer peripheral surface is formed into a conical surface whose width narrows downward and is in contact with the inner peripheral surface upper portion. The first upper surface is formed as an annular plane, its outer periphery is connected to the lower end of the second outer surface, and is capable of surface contact with the second wall surface. The first outer surface extends downward from the inner periphery of the first upper surface, and is formed as a conical surface that narrows downward, and is capable of surface contact with the third wall surface. The baffle side mold surface is connected to the lower end edge of the first outer surface, and the baffle has a compressed air passage (51) that opens to the first upper surface.

According to this aspect, the baffle and the funnel are connected by surface contact between the second outer peripheral surface of the baffle and the upper part of the inner peripheral surface of the funnel. Also, the baffle and the rough mold are connected by surface contact between the first outer peripheral surface of the baffle and the third wall surface of the rough mold. The diameter of the first outer peripheral surface can be reduced regardless of the diameter of the funnel. This allows the diameter of the baffle side mold surface provided at the lower end of the first outer peripheral surface to be reduced. Also, since the third wall surface that is in surface contact with the first outer peripheral surface is formed as a conical surface, even if the angle of the upper end of the rough mold side mold surface is inclined, the angle formed by the connection part between the rough mold side mold surface and the third wall surface can be maintained relatively large. This allows the connection part between the rough mold side mold surface and the baffle side mold surface to be located radially inside the rough mold side mold surface. As a result, it is possible to provide a blow and blow molding device that can position the baffle mark radially inside the bottle.

In the above aspect, the second outer peripheral surface may be capable of surface contact with the first wall surface.

According to this aspect, the first outer peripheral surface, the first top surface, and the second outer peripheral surface abut against the corresponding third wall surface, second wall surface, and first wall surface, so that the baffle is stably supported by the rough mold.

In the above embodiment, the upper end of the rough mold cavity may have a horizontal cross-sectional area that decreases toward the top.

According to this aspect, the connection between the rough mold side surface and the baffle side surface can be positioned radially inward of the rough mold side surface.

In the above embodiment, the angle between the upper end of the rough mold side mold surface that forms the rough mold cavity and the third wall surface may be 70 degrees or more and 130 degrees or less.

This aspect improves the durability of the connection between the third wall surface and the rough mold side surface.

In the above embodiment, the baffle side mold surface may be formed as a concave surface that is recessed upward, and the upper edge of the rough mold side mold surface may be smoothly connected to the baffle side mold surface.

This aspect makes it possible to make the baffle marks formed on the bottle less clear.

In the above aspect, the baffle may have a second top surface (46) that extends radially outward from the outer circumferential edge of the second outer circumferential surface and faces downward, and the second top surface may be capable of surface contact with the upper end surface of the funnel.

According to this aspect, the first outer peripheral surface and the first top surface abut against the corresponding upper part of the inner peripheral surface and the upper end surface, so that the baffle is stably supported by the funnel.

In the above aspect, the funnel may have an inner diameter smaller than the inner diameter of the lower end of the third wall surface.

According to this aspect, contact between the gob and the third wall surface can be prevented when the gob is fed into the rough mold.

The present invention provides a blow-and-blow molding device that can position baffle marks radially inward of a bottle.

FIG. 1 is an explanatory diagram of a blow-and-blow molding device and a glass bottle molding device according to an embodiment. FIG. 2 is a cross-sectional view showing a second embodiment of the blow and blow molding apparatus; FIG. 3 is a cross-sectional view showing a third embodiment of the blow and blow molding apparatus; Image showing the bottom of a glass bottle

The following describes an embodiment of the present invention. The blow-and-blow molding device 1 according to this embodiment performs a parison molding process for molding a parison P from a glass gob G. The blow-and-blow molding device 1 may be configured integrally with a glass bottle molding device 2. The glass bottle molding device 2 performs a glass bottle molding process for molding a glass bottle C from the parison P.

As shown in FIG. 1, the blow and blow molding device 1 has a rough mold 4, a funnel 5, and a baffle 6. The blow and blow molding device 1 also has a mouth mold 7. The glass bottle molding device 2 has a finishing mold 8 and a bottom mold 9 corresponding to the glass bottle C.

The mold 7 is supported by an inverting arm 12 that is rotatably supported on a base 11. The inverting arm 12 has a center of rotation that extends horizontally, and rotates between an initial position that extends horizontally and an inverted position that is rotated 180° upward from the initial position. The mold 7 is supported at the tip of the inverting arm 12. When the inverting arm 12 is in the initial position, the mold 7 protrudes upward from the tip of the inverting arm 12.

The mouth mold 7 has a pair of mouth mold pieces 7A having a mating surface extending vertically, and a guide ring 7B arranged between the pair of mouth mold pieces 7A. A mouth mold cavity 7C extending vertically is formed on the mating surface of the mouth mold pieces 7A. Each of the pair of mouth mold pieces 7A and the guide ring 7B is supported by an inverted arm 12. The base 11 is provided with a plunger 7D that passes through the guide ring 7B and enters the mouth mold cavity 7C when the mouth mold 7 is in the initial position. The plunger 7D is movable between an entry position where it enters the mouth mold cavity 7C and a retracted position where it is removed downward from the mouth mold cavity 7C. When the plunger 7D is in the entry position, the mouth mold 7 forms a shape corresponding to the mouth of the parison P between the pair of mouth mold pieces 7A and the plunger 7D.

When the inversion arm 12 is in the initial position, the rough mold 4 is positioned above the inversion arm 12. As shown in FIG. 2, the rough mold 4 has a rough mold cavity 14 formed inside the rough mold 4 and an upper connection hole 16 extending from the upper end of the rough mold cavity 14 to the upper end surface 15 of the rough mold 4. The rough mold 4 also has a lower connection hole 18 extending from below the rough mold cavity 14 to the lower end surface 17 of the rough mold 4. The rough mold 4 is formed by a pair of rough mold pieces 4A abutting at mating surfaces 19 extending vertically. The rough mold cavity 14, the upper connection hole 16, and the lower connection hole 18 are formed in the mating surface 19.

As shown in FIG. 1, the pair of rough mold pieces 4A are supported by a base 11 so as to be movable between a use position and a retracted position. In the use position, the mating surfaces 19 of the pair of rough mold pieces 4A abut each other. In the retracted position, the mating surfaces 19 of the pair of rough mold pieces 4A are horizontally separated from each other. When the pair of rough mold pieces 4A are in the use position, the lower parts of the pair of rough mold pieces 4A horizontally clamp the upper parts of the pair of mouth mold pieces 7A. This allows the mouth mold 7 to be received in the lower connection hole 18 of the rough mold 4, connecting the lower end of the rough mold cavity 14 with the mouth mold cavity 7C.

As shown in FIG. 2, the rough mold cavity 14 is formed by the rough mold side mold surface 21 formed on the mating surface 19. The rough mold side mold surface 21 forms the shape of the side of the parison P and the outer periphery of the bottom of the parison P. The upper end of the rough mold cavity 14 corresponds to the outer periphery of the bottom of the parison P. The upper end of the rough mold side mold surface 21 forms the outer periphery of the bottom of the parison P. The horizontal cross-sectional area of the upper end of the rough mold cavity 14 decreases upward. In other words, the upper end of the rough mold side mold surface 21 is inclined upward toward the central axis of the rough mold 4. In addition, the diameter of the upper end of the rough mold cavity 14 is formed to be smaller than the maximum diameter of the rough mold cavity 14.

The upper connection hole 16 is formed by a first wall surface 23, a second wall surface 24, and a third wall surface 25 arranged in order from the top. The first wall surface 23 extends downward from the upper end surface 15 of the rough mold 4 and is formed as a conical surface that narrows downward. The second wall surface 24 is formed as an annular plane facing upward, and its outer periphery is connected to the lower end of the first wall surface 23. The third wall surface 25 extends downward from the inner periphery of the second wall surface 24 to the upper end of the rough mold cavity 14 and is formed as a conical surface that narrows downward. In other words, the upper and lower parts of the upper connection hole 16 are tapered holes that narrow downward. At the boundary between the upper and lower parts of the upper connection hole 16, the upper surface is formed by the second wall surface 24.

It is preferable that the angle θ between the upper end of the rough mold side mold surface 21 and the third wall surface 25 is 70 degrees or more and 130 degrees or less. It is also preferable that the angle θ between the upper end of the rough mold side mold surface 21 and the third wall surface 25 is 90 degrees or more and 120 degrees or less. It is even more preferable that the angle θ between the upper end of the rough mold side mold surface 21 and the third wall surface 25 is an obtuse angle. This can improve the durability of the connection between the rough mold side mold surface 21 and the third wall surface 25.

The funnel 5 or baffle 6 is connected to the upper connection hole 16. The funnel 5 is formed in a cylindrical shape that is open at the top and bottom. The funnel 5 has a lower end surface 27 that can make surface contact with the second wall surface 24, an outer peripheral surface lower portion 28 that can make surface contact with the first wall surface 23, and an inner peripheral surface upper portion 29 that has the same inclination as the first wall surface 23. When viewed from above, the inner peripheral surface upper portion 29 overlaps with the first wall surface 23. The funnel 5 is formed in a cylindrical shape.

The lower end surface 27 of the funnel 5 is formed as a horizontal plane having an annular shape. The lower edge of the lower outer peripheral surface 28 is connected to the outer peripheral edge of the lower end surface 27. The lower outer peripheral surface 28 is formed as a conical surface whose width narrows downward. The funnel 5 has an upper end surface 31 at its upper end. The upper end surface 31 is formed as a horizontal plane having an annular shape. The upper edge of the upper inner peripheral surface 29 is connected to the inner peripheral edge of the upper end surface 31. The upper inner peripheral surface 29 is formed as a conical surface whose width narrows downward.

The lower part 32 of the inner periphery of the funnel 5 is formed into a conical surface that narrows downward. The funnel 5 is supported by a funnel movement device (not shown).

The lower part of the baffle 6 has a baffle side mold surface 41, a first outer peripheral surface 42, a first upper surface 43, and a second outer peripheral surface 44 arranged in this order from the bottom. The second outer peripheral surface 44 is formed as a conical surface whose width narrows downward. The second outer peripheral surface 44 can be in surface contact with the upper part of the inner peripheral surface 29. The first upper surface 43 is formed as an annular plane. The first upper surface 43 is connected to the lower end of the second outer peripheral surface 44 at its outer periphery. The first upper surface 43 can be in surface contact with the second wall surface 24. The first outer peripheral surface 42 extends downward from the inner periphery of the first upper surface 43. The first outer peripheral surface 42 is formed as a conical surface whose width narrows downward. The first outer peripheral surface 42 can be in surface contact with the third wall surface 25. The baffle side mold surface 41 is connected to the lower end edge of the first outer peripheral surface 42. The baffle side mold surface 41, the first outer peripheral surface 42, the first top surface 43, and the second outer peripheral surface 44 are arranged coaxially with the central axis of the baffle 6, which extends vertically.

The second outer peripheral surface 44 may be formed so as to be capable of surface contact with the first wall surface 23. In other embodiments, the second outer peripheral surface 44 may be formed smaller than the first wall surface 23 in order to provide a fitting clearance.

The baffle 6 has a second upper surface 46 that extends radially outward from the outer periphery of the second outer periphery 44 and faces downward. The second upper surface 46 may be capable of surface contact with the upper end surface 31 of the funnel 5. A flange portion 47 that extends radially outward from the second outer periphery 44 is provided at the center of the baffle 6 in the vertical direction. The flange portion 47 is formed in a disk shape with its surface facing up and down. The second upper surface 46 constitutes the lower surface of the flange portion 47. The diameter of the flange portion 47 is larger than the diameter of the upper edge of the second outer periphery 44. A tube portion 48 that extends upward is provided on the upper surface of the flange portion 47.

The baffle 6 has a compressed air passage 51 that opens to the first top surface 43. The compressed air passage 51 has an upper passage 51A that extends vertically in a straight line inside the tube 48, and at least one lower passage 51B that extends from the lower end of the upper passage 51A in a straight line to the first top surface 43 at an incline relative to the vertical direction. The upper end of the upper passage 51A opens to the upper end of the tube 48. The upper end of the upper passage 51A is connected to a compressed air source via a supply pipe (not shown).

The upper end of the tube portion 48 is supported by a baffle moving device (not shown). The baffle moving device has a power source such as an electric motor and moves the baffle 6. The compressed air supply pipe may be provided integrally with the baffle moving device.

The baffle side mold surface 41 is formed as a concave surface that is recessed upward. The outer peripheral edge of the baffle side mold surface 41 and the upper edge of the rough mold side mold surface 21 are each formed in a circular shape. The outer peripheral edge of the baffle side mold surface 41 can be connected to the upper edge of the rough mold side mold surface 21. It is preferable that the upper edge of the rough mold side mold surface 21 can be smoothly connected to the baffle side mold surface 41.

The operation and effect of the blow and blow molding device 1 configured as described above will be explained. The blow and blow molding device 1 can take a first configuration for receiving a glass gob G (see FIG. 1), a second configuration for performing a settling blow (see FIG. 2), a third configuration for performing a counter blow (see FIG. 3), and a fourth configuration for removing a parison P.

As shown in FIG. 1, in the first form of the blow and blow molding device 1, the inversion arm 12 is placed in the initial position, and the mouth mold 7 is placed above the inversion arm 12. The pair of rough mold pieces 4A abut against each other at the mating surface 19 and clamp the mouth. This connects the rough mold cavity 14 and the mouth mold cavity 7C. The funnel 5 is connected to the upper connection hole 16 of the rough mold 4. At this time, the lower end surface 27 abuts against the second wall surface 24, and the outer peripheral surface lower portion 28 abuts against the first wall surface 23, thereby determining the position of the funnel 5 relative to the rough mold 4. In this state, the lower end of the inner peripheral surface lower portion 32 of the funnel 5 extends radially inward beyond the lower end of the third wall surface 25. The baffle 6 is retracted to a position away from the funnel 5 and the rough mold 4 to the side.

When the blow and blow molding device 1 is in the first form, the glass gob G falls toward the funnel 5. The glass gob G enters from the upper end of the funnel 5 and is guided by the funnel 5 to fall into the rough mold cavity 14. At this time, the lower end of the lower part 32 of the inner periphery of the funnel 5 extends radially inward beyond the lower end of the third wall surface 25, so that the glass gob G is prevented from coming into contact with the third wall surface 25.

As shown in FIG. 2, in the second form of the blow and blow molding device 1, the mouth mold 7, rough mold 4, and funnel 5 are the same as in the first form, and further, the baffle 6 is connected to the upper end of the funnel 5. The position of the baffle 6 relative to the funnel 5 is determined by the abutment of the upper inner peripheral surface 29 and the second outer peripheral surface 44. At this time, the upper end surface 31 and the second upper surface 46 may abut. The abutment of the upper end surface 31 and the second upper surface 46 stabilizes the position of the baffle 6 relative to the funnel 5. In the second form, since the first upper surface 43 is separated from the inner peripheral surface of the funnel 5, the compressed air passage 51 connects to the rough mold cavity 14 through the inside of the funnel 5.

In the second mode, compressed air is supplied to the upper end of the rough mold cavity 14 through the baffle 6 and funnel 5, and the glass gob G is pushed downward and adheres to the mouth mold 7. That is, the glass gob G adheres to the mouth mold 7 by the settling blow, and the mouth of the parison P is formed. The mouth of the parison P is cooled by the mouth mold 7, and the shape is determined.

In the third form of the blow and blow molding device 1, the mouth mold 7 and the rough mold 4 are the same as in the first form, but the funnel 5 is retracted from the rough mold 4, and the baffle 6 is directly connected to the rough mold 4. The position of the baffle 6 relative to the rough mold 4 is determined by the first outer peripheral surface 42 abutting against the third wall surface 25 and the first top surface 43 abutting against the second wall surface 24. At this time, the second outer peripheral surface 44 may abut against the first wall surface 23. The position of the baffle 6 relative to the rough mold 4 is stabilized by the abutment of the second outer peripheral surface 44 and the first wall surface 23. The outer peripheral edge of the baffle side mold surface 41 is connected to the upper edge of the rough mold side mold surface 21. The lower end of the compressed air passage 51 is blocked by the second wall surface 24.

As shown in FIG. 3, in the third form, compressed air is supplied to the inside of the mouth of the parison P through the mouth mold 7, and the parison P expands upward. The outer surface of the parison P abuts against the rough mold side mold surface 21 and the baffle side mold surface 41, and is molded into a predetermined shape.

In the fourth form of the blow and blow molding device 1, the baffle 6 retreats from the rough mold 4, and the pair of rough mold pieces 4A separate from each other and move away from the parison P. In this state, the parison P is supported by the mouth mold 7. The inversion arm 12 rotates from the initial position to the inversion position, and the parison P supported by the mouth mold 7 moves to the glass bottle molding device 2. Then, the finishing mold 8 and the bottom mold 9 are arranged around the parison P. In this state, the mouth mold 7 releases the parison P, and the parison P is supported by the molding mold. Next, the inversion arm 12 returns from the inversion position to the initial position. Then, the mouth mold 7, the rough mold 4, and the funnel 5 are set, and the blow and blow molding device 1 returns to the first form.

According to the blow and blow molding apparatus 1 according to the above embodiment, the baffle 6 and the funnel 5 are connected by surface contact between the second outer peripheral surface 44 of the baffle 6 and the upper part 29 of the inner peripheral surface of the funnel 5. Also, the baffle 6 and the rough mold 4 are connected by surface contact between the first outer peripheral surface 42 of the baffle 6 and the third wall surface 25 of the rough mold 4. The diameter of the first outer peripheral surface 42 can be reduced regardless of the diameter of the funnel 5. This allows the diameter of the baffle side mold surface 41 provided at the lower end of the first outer peripheral surface 42 to be reduced. Also, since the third wall surface 25 that is in surface contact with the first outer peripheral surface 42 is formed into a conical surface, even if the angle of the upper end of the rough mold side mold surface 21 is inclined, the angle θ formed by the connection portion between the rough mold side mold surface 21 and the third wall surface 25 can be maintained relatively large. As a result, the connection portion between the rough mold side mold surface 21 and the baffle side mold surface 41 can be arranged radially inside the rough mold side mold surface 21. This makes it possible to provide a blow and blow molding device 1 that can position the baffle mark 61 radially inside the glass bottle C, as shown in FIG. 4.

The blow and blow molding device 1 makes it possible to position the baffle marks 61 inside the knurling 63 formed on the bottom of the glass bottle C. The knurling 63 is a number of protrusions formed on the bottom of the glass bottle C, and is arranged in a circular shape on the bottom of the glass bottle C. This makes it possible to avoid contact between the baffle marks 61 and the conveyor when the glass bottle C is transported by the conveyor. For example, when the glass bottle C transfers from one conveyor to another, it is possible to prevent the baffle marks 61 from getting caught on the conveyor and tipping over.

The upper end of the rough mold cavity 14 has a smaller horizontal cross-sectional area going upward, so the connection between the rough mold side mold surface 21 and the baffle side mold surface 41 can be positioned radially inward of the rough mold side mold surface 21. This allows the baffle mark 61 to be positioned even further radially inward.

The baffle side mold surface 41 is formed as a concave surface, and the baffle side mold surface 41 and the rough mold side mold surface 21 are smoothly connected, so the baffle mark 61 formed on the glass bottle C can be made unclear. This makes it possible to prevent the baffle mark 61 from coming into contact with the conveyor that transports the glass bottle C.

This concludes the explanation of the specific embodiment, but the present invention is not limited to the above embodiment and can be modified in a wide range of ways.

1: Blow and blow molding device 2: Molding device 4: Rough mold 5: Funnel 6: Baffle 7: Mouth mold 14: Rough mold cavity 15: Upper end surface 16: Upper connection hole 19: Matching surface 21: Rough mold side mold surface 23: First wall surface 24: Second wall surface 25: Third wall surface 27: Lower end surface 28: Outer peripheral surface lower portion 29: Inner peripheral surface upper portion 31: Upper end surface 32: Inner peripheral surface lower portion 41: Baffle side mold surface 42: First outer peripheral surface 43: First figure upper surface 44: Second outer peripheral surface 46: Second figure upper surface 51: Compressed air passage G: Glass gob P: Parison

Claims (7)

1. A blow and blow molding apparatus for forming a parison from a glass gob, the blow and blow molding apparatus having a rough mold, a funnel, and a baffle, comprising:
the blank mold has a blank mold cavity formed inside the blank mold and an upper connection hole extending from an upper end of the blank mold cavity to an upper end surface of the blank mold,
the upper connection hole is formed by a first wall surface, a second wall surface, and a third wall surface arranged in this order from above,
The first wall surface is formed into a conical surface that extends downward from the upper end surface of the rough mold and narrows downward,
The second wall surface is formed as an annular plane facing upward and is connected to a lower end of the first wall surface at its outer circumferential edge.
The third wall surface extends downward from the inner peripheral edge of the second wall surface to the upper end of the rough mold cavity, and is formed into a conical surface whose width narrows downward,
The funnel is formed in a cylindrical shape with openings at the top and bottom,
the funnel has a lower end surface capable of surface-contacting the second wall surface, an outer circumferential surface lower portion capable of surface-contacting the first wall surface, and an inner circumferential surface upper portion having the same inclination as the first wall surface,
The lower part of the baffle has a baffle side mold surface, a first outer peripheral surface, a first top surface, and a second outer peripheral surface, which are arranged in this order from below,
The second outer circumferential surface is formed into a conical surface whose width narrows downward and is capable of surface contact with an upper portion of the inner circumferential surface,
The first top surface is formed as an annular plane, and an outer circumferential edge of the first top surface is connected to a lower end of the second outer circumferential surface and is capable of surface contact with the second wall surface.
The first outer circumferential surface extends downward from an inner circumferential edge of the first top surface, and is formed into a conical surface whose width narrows downward, and is capable of surface-contacting the third wall surface,
the baffle side mold surface is connected to a lower edge of the first outer circumferential surface,
The baffle has a compressed air passage opening to an upper surface of the first mold. The blow and blow molding device according to claim 1, wherein the second outer peripheral surface is capable of surface contact with the first wall surface. The blow and blow molding device according to claim 1, wherein the upper end of the rough mold cavity has a horizontal cross-sectional area that decreases upward. The blow-and-blow molding device according to claim 3, wherein the angle between the upper end of the rough mold side mold surface forming the rough mold cavity and the third wall surface is 70 degrees or more and 130 degrees or less. The baffle side mold surface is formed into a concave surface that is concave upward,
5. The blow and blow molding apparatus according to claim 4, wherein an upper edge of the rough mold side surface is smoothly connected to the baffle side surface. The baffle has a second top surface that extends radially outward from an outer circumferential edge of the second outer circumferential surface and faces downward;
The blow and blow molding apparatus according to claim 1 , wherein the second top surface is capable of surface-contacting an upper end surface of the funnel. The blow and blow molding device according to claim 1, wherein the funnel has an inner diameter smaller than the inner diameter of the lower end of the third wall surface.

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