JPH1170565A - Blowing-in nozzle of blow molding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mold a liquid container of which the mouth part has a small diameter by making a slidable drive pin hollow to make it possible to flow air in a blowing-in nozzle from the upper end thereof and cooling the tip part of the blowing-in nozzle by circulating a cooling medium. SOLUTION: The blowing-in of air is enabled even if a slidable drive pin 10 is provided at any position by providing a blowing-in air inlet 42 to the upper end of an air blowing-in nozzle 4. A nozzle tip part 5 can be always set to a cooling state by injecting and circulating constant temp. water having a predetermined temp. from a cooling medium inlet 62 by a cooling means 6 and discharging a cooling medium from a cooling medium outlet 63 through the internal water channel 61 of the nozzle tip part 5. When the air blowing-in nozzle 4 is driven in, the nozzle tip part 5 is not heated at a container mouth part and the generation of a carry-in part and a rough surface can be prevented at the container mouth part. The diameter of the air blowing-in nozzle can be made small and, even if the diameter of the blowing-in nozzle 4 is small, the circulating passage of a cooling medium can be ensured by providing the nozzle tip part 5 as a separate element.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for blowing air used for forming a liquid container or the like having a small-diameter container opening by hollow molding, and more particularly to a rod (drive pin) capable of pressing an end of a parison. The present invention relates to a blow nozzle for a blow molding apparatus having a blow nozzle.

[0002]

2. Description of the Related Art In recent years, with the demand for liquid containers such as shampoos and cosmetics, a blowable nozzle of a hollow molding device uses a flexible resin such as nylon or EVOH which has a small diameter at the mouth of the container and has good releasability. The need has arisen to mold small diameter liquid containers. In the case of these releasable resins, the melting temperature is as high as about 200 ° C. to 230 ° C., and there is a property that they are not slippery. For this reason, when the nozzle tip of the air blowing nozzle is driven into the container mouth to perform air blowing, the nozzle tip is heated by the high-temperature parison, and the container mouth contacting the nozzle tip is less likely to slip, As shown in FIGS. 12 and 13, the resin inside the container opening is brought into the container, and a rough surface 81 is formed in which the container opening and the container opening are rough.
Had poor molding.

[0003] In particular, when forming a multi-layer liquid container such as a small-diameter double container, it is preferable that the inner-layer parison has a small diameter so as not to interfere with the outer parison. Since it is necessary to pass a drive pin through the inside, there is a limit in reducing the diameter in processing. For this reason, the tip of the tapered nozzle is forcibly inserted into the small-diameter inner parison and driven into the inner parison.
In order to prevent such a resin carry-in portion 82 from occurring, it was necessary to cool the nozzle tip of the blowing nozzle. For example, the time for driving the nozzle tip into the container mouth is about 10 to 15 seconds, and the time when the nozzle is not driven is about 2 to 3 seconds, and the nozzle is again driven into the container mouth. For this reason, sufficient cooling can be achieved even if cooling water is sprayed on the nozzle tip while the nozzle tip is not driven into the container mouth, or cooling air is passed through the air blowing nozzle. It was impossible.

For example, in the conventional air blowing nozzle 4, when the actuator-type pin-driven air blowing nozzle 4 as shown in FIG. 14 is applied to a small-diameter liquid container, the following problems arise. JP-A-7-68627
issue). In the nozzle 4 for blowing air, the tip of the nozzle can be cooled by a cooling structure in which the groove 20 for circulating the cooling medium 17 is formed inside the multiple pipe. However, in such a structure, the groove 20 for communicating the cooling medium 17 and the groove 16 for communicating the air blowing pressure fluid 14 with the multiple pipe must be formed, and further, the actuator for driving the pin is connected to the air blowing nozzle 4. Since the structure is provided on the upper side, the structure becomes large, and it is impossible to reduce the diameter of the multiple tube itself. In particular, in the case of a small-diameter parison, since the diameter is about 10 mm, the diameter of the blowing nozzle 4 needs to be about 15 mm.
In such a conventional structure, a driving pin must be inserted into the air blowing nozzle 4 and the grooves 16 and 20 for the pressure medium 14 and the cooling medium 17 must be provided. It was possible.

[0005] Further, a small-diameter blowing nozzle 4 is made possible, and there is a blowing nozzle 4 of a type in which a pin is driven by a cylinder type as shown in FIG. 15, but such a blowing nozzle 4 is used as a small liquid container. When applied to molding, there are the following problems (Japanese Patent Application No. 8-343718).
issue). The air blowing nozzle 4 has a structure in which the driving pin 10 for blowing is hollow, a blowing function is added to the driving pin, and a groove for communicating the pressure medium is omitted, thereby enabling a small-diameter nozzle. is there. However, in such a structure, since there is no cooling means, bringing in the resin at the container mouth becomes a problem. Even if the cooling means for the air blowing nozzle 4 shown in FIG. 14 is added to the air blowing nozzle 4 having such a structure, a groove through which the cooling medium flows, which is formed almost in the longitudinal direction of the multiple pipe. Is formed, the groove diameter must be set to several mm in order to reduce the diameter of the multiple pipe. However, the air inlet 42 for blowing the driving means 7 and the driving pin 10 is formed in the middle of the air blowing nozzle 4. Therefore, it is impossible to form a groove in terms of processing.

In the air blowing nozzle 4, it is necessary to supply air even when the driving pin 10 is above the container. However, a blowing air inlet 42 is provided on the side surface, and air is supplied from the upper end of the driving pin 10. Due to the structure for supplying air, there is a problem that air blowing cannot be supplied unless the drive pin 10 is at the lower end position. Further, in the conventional air blowing nozzle 4, the driving means 7 of the driving pin 10 is set at a middle position, and the structure is such that the seal is held at one place, but the driving pin 10 is held at only one point. , The stability of the drive pin 10 becomes insufficient,
There was a problem that slidability was not good

[0007]

SUMMARY OF THE INVENTION The present invention relates to a nylon,
It is an object of the present invention to provide a blowing nozzle of a hollow molding apparatus which is made of a resin having releasability such as EVOH and is capable of molding a liquid container or the like having a small-diameter container opening. In addition, the present invention provides a blowing nozzle for a blow molding apparatus capable of cooling a front end nozzle by adding cooling means by circulating a cooling medium, preventing a carry-in portion and a rough surface of a resin, and preventing a molding defect. It is intended to be. Still another object of the present invention is to provide a blowing nozzle of a blow molding apparatus that allows air to be blown at any position of a drive pin by blowing air from the upper end of the air blowing nozzle. .

[0008]

The blowing nozzle of the blow molding apparatus of the present invention is a blowing nozzle (4) having a driving pin (10) slidable up and down in a cylindrical body (43). The drive pin (10) has a hollow interior so that gas can be blown from the upper end of the blowing nozzle (4), and the cooling medium is circulated to the nozzle tip (5) of the blowing nozzle (4). A cooling means (6) capable of cooling is provided. (Claim 1) The blow nozzle of the blow molding apparatus according to claim 1, wherein the drive pin (10) supplies a pressure medium from a side surface of the cylindrical body (43) of the blow nozzle (4). Slidable in the up and down direction by the cooling means (6)
Is characterized in that a cooling medium is circulated through an internal channel (61) having an internal groove shape formed at a nozzle tip (5). (Claim 2) The blowing nozzle of the blow molding apparatus according to claim 1 or 2, wherein the nozzle tip (5) is separate from the cylindrical main body (43) of the blowing nozzle (4). It is characterized by having done. (Claim 3)

A cylindrical main body (43) composed of multiple tubes, and a drive pin (10) composed of a hollow rod slidable up and down in a through hole formed in the axis of the cylindrical main body (43). An air drive supply port (41a, 41b) disposed on a side surface of the cylindrical main body (43) for driving the drive pin (10) by air;
From the upper end of the air blowing nozzle (4), drive pins (1
Blowing air inlet (42) capable of blowing air into 0)
And a cooling means (6) provided at the nozzle tip (5) and capable of cooling the nozzle tip (5). The nozzle tip (5) is provided with a cylindrical main body (43). It is a separate body and has a tapered shape toward the front end side. The rear end side of the nozzle front end (5) can be connected to the tubular main body (43) by screwing, and the cooling means (6 ) Are internal water passages (6) through which a cooling medium can circulate at the nozzle tip (5).
1) a cooling medium inlet (62) formed in the side surface of the cylindrical main body (43) so as to communicate with the internal water passage (61) and capable of injecting a cooling medium, and the other side surface of the cylindrical main body (43) And a cooling medium outlet (63) capable of communicating with the internal water passage (61) and discharging the cooling medium. (Claim 4) In addition, the nozzle tip (5) of the blowing nozzle (4)
Is characterized by having a diameter of about 15 mm and a tapered shape. (Claim 5)

[0010]

With the blowing nozzle of the blow molding apparatus according to the present invention, as described below, it is possible to form a resin having a small diameter at the mouth of the container and having releasability such as nylon or EVOH. The drive pin (10) not only has a function of pressing against the bottom of the container but also has a hollow interior so that air can also be blown, so that it is not necessary to separately form a nozzle for blowing air. It is possible to reduce the diameter of the pipe of the nozzle for use (4). Further, by providing the nozzle tip (5) as a separate body, even if the diameter of the blowing nozzle (4) is small, it is possible to secure a flow path for circulating the cooling medium. Further, by providing a cooling means (6) capable of cooling by circulation of a cooling medium at the nozzle tip (5) of the blowing nozzle (4), the resin carry-in portion (82) and the container mouth of the container mouth can be formed. The formation of the rough surface (81) can be prevented. In particular, when the molding resin is made of nylon, EVOH, or the like having releasability and flexibility, high-temperature melting is necessary, and the resin itself is not easily slippery. Cooling means (6) at the container mouth
This prevents the nozzle tip (5) from slipping during driving into the container mouth, which is particularly effective. Further, the drive pin (10) blows air from the upper end of the blowing nozzle (4) by making the inside hollow, so that air can be blown into the container regardless of the position of the drive pin (10). It is possible to do.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a blow nozzle of a blow molding apparatus showing an embodiment of the present invention, FIG. 2 is an external view showing a state where the blow nozzle of FIG. 1 is driven into a container, and FIG. FIG. 4 is a partially enlarged sectional view showing a state in which the tip of the blowing nozzle is driven into a container. As shown in FIG. 1, the blowing nozzle 4 of the blow molding apparatus of the present invention basically includes a cylindrical main body 43 formed of a multi-tube and a vertical through hole formed in the axis of the cylindrical main body 43. A driving pin 10 formed of a hollow rod body slidable on the side, and an opening disposed at two places on the side surface of the cylindrical main body 43;
Air drive supply port 41 for driving drive pin 10 by air
(41a, 41b), a blowing air inlet 42 through which air can be blown from the upper end of the air blowing nozzle 4 through the upper end of the drive pin 10, and the tip 5 of the blowing nozzle 4.
And cooling means 6 for cooling the nozzle tip 5.

The nozzle tip 5 is separate from the cylindrical main body 43 as shown in detail in FIGS.
The nozzle tip 5 has a tapered shape toward the tip, and can be connected to the cylindrical main body 43 by screwing with a screw 51. At the time of connection, the screw 5
1. Sealed by a seal at the lower end. Nozzle tip 5
Has a tapered shape, so that it is easy to insert even when the air blowing nozzle 4 is driven into a small-diameter liquid container. The nozzle tip 5 is provided with a cooling means 6 capable of circulating a cooling medium.
Are arranged. The cooling means 6 includes an internal water passage 61 through which the cooling medium circulates, cooling medium inlets 62, 62 formed in the side surface of the cylindrical main body 43 to communicate with the internal water passage 61, and through which the cooling medium can be injected. An opening is formed in the side surface, and the cooling medium outlets 63 communicate with the internal water passage 61 and can discharge the cooling medium. As shown in FIG. 4, the internal waterway 61 includes an internal waterway upper portion 61a and an internal waterway lower portion 61b. This is because, when the internal water channel 61 is formed, the nozzle tip portion 5 is divided into an upper portion 5a and a lower portion 5b to form an opening for each internal water channel. The groove diameter of the inner channel upper part 61a is about 1 to 3 mm, and the groove diameter of the inner channel lower part 61b is about 2 to 4 mm, which is extremely small. The upper part 5a and the lower part 5b of the nozzle tip 5
As shown in the figure, after the upper part 5a and the lower part 5b are combined, they are joined at a joint so as not to leak by welding or the like. As shown in FIG. 5, which is a partial cross-sectional view taken along the line AA of FIG. 3, partitions 64 are formed on the upper portion 5a of the nozzle tip 5 at two locations on the opposite side of the circumference, and the nozzle tip 5 is screwed and connected. In addition, an opening 65 serving as the internal water channel 61 is secured. That is, the cooling medium injected from the cooling medium inlets 62 and 62 flows downward through the internal water channel 61 on the inlet side, and flows downward at the lower portion 5 b side of the nozzle tip 5.
The cooling medium is discharged from the cooling medium outlets 63 by communicating with the internal water passage 61 on the opposite outlet side by a flow path (not shown). Since the nozzle tip 5 is screwed and connected to the tubular main body 43, the position of the partition 64 may fluctuate with respect to the positions of the cooling medium inlet and outlets 62 and 63. Since the two partitions are arranged at positions 180 degrees apart from each other in the circumferential direction, the cooling medium can communicate with the partition 64 at any position. In the present embodiment, the cooling medium circulates constant-temperature water of about 10 to 12 ° C., but may be other than water as long as it is a cooling medium.

As shown in FIG. 1, the drive pin 10 is hollow and capable of blowing air. Although not shown, the driving pin 10 is used for blowing air from a blowing air inlet 42 which is an upper end opening of the blowing nozzle 4. Is supplied. Further, as shown in FIG. 3, the drive pin 10 is supplied with air from a drive air supply port 41 so that the internal cylinder 10 a
Is slid up and down by the up and down movement of. Cylinder 10
Although a is simply shown in FIG. 3, actually,
A driving air supply port 41a, 41
The air from b is vertically movable by receiving the air from the flange b, and has a hollow portion through which air can be blown from the blow air inlet 42. Specifically, when air is supplied from the lower driving air supply port 41a, the air lifts the cylinder 10a upward as shown by the arrow, so that the driving pin 10 is pushed upward. When air is supplied from the air supply port 41b, the air pushes down the cylinder 10a as shown by the arrow, so that the drive pin 10 is pushed down. As described above, the vertical movement of the drive pin 10 is controlled by the vertical drive air supply ports 41a and 41b.

Next, with reference to FIGS. 6 to 10, a description will be given of a molding process when the present invention is applied to container molding by the blowing nozzle 4 of the hollow molding apparatus of the present embodiment. here,
FIG. 6 shows a molding step of the hollow molded container, and is a schematic view showing a state in which the parison 9 is discharged from the extruder 2 via the crosshead 1, and FIG. 7 shows a state in which the parison 9 is sandwiched between the molds 3. FIG. 8 is a schematic diagram showing a state in which the upper part of the parison pinched by the mold 3 is pinched, and FIG. 9 is a schematic diagram showing a state in which the air blowing nozzle 4 is driven into the container mouth. . First, as shown in FIG. 6, the parison 9 heated and melted is discharged from the extruder 2 via the crosshead 1 and hangs between the two molds 3 a and 3 b of the mold 3. next,
As shown in FIG. 7, after closing both the molds 3a and 3b and clamping the mold, as shown in FIG. 8, the upper end of the parison 9 is cut to a predetermined length by a cutter (not shown). The cut parison 9 is moved directly below the air blowing nozzle 4 by a mold moving means (not shown) as shown in FIG.
The air blowing nozzle 4 is driven into the parison 9, and air is blown into the parison 9 from the blowing air inlet 42 at the upper end of the air blowing nozzle 4. At this time, by supplying air from the upper driving air supply port 41b, the cylinder 10a in the driving pin 10 shown in FIG. 3 is lowered, and the driving pin 10 moves downward, and as shown in FIG. Thus, the drive pin 10 can press the lower end of the parison 9. In particular, pressing the drive pin 10 in this manner is effective when the container bottom is formed into a thin film, or when the bottoms of multiple containers are connected to each other.

Specifically, as shown in FIG. 11, when a double container composed of the inner container 8a and the outer container 8b is formed, the bottoms of the containers are pushed by the driving pins 10 before blowing air. It is possible to form the binding portion 8c. In this case, it is desirable that the bottom of the inner container 8a is cut in advance by pinching. Outer container 8b
It is assumed that the bottom is pinch-cut by the two dies 3a and 3b and the bottoms are welded to each other. As described above, in the blowing nozzle 4 of the blow molding apparatus of the present embodiment,
In the air blowing, since the blowing air inlet 42 is at the upper end of the air blowing nozzle 4, air can be blown at any position of the driving pin 10. Also, air can be blown into the bottom of the container. Further, the nozzle tip 5 injects constant temperature water from the cooling medium inlet 62 by the cooling means 6 so as to circulate constant temperature water of about 10 to 12 ° C., and through the internal water channel 61 of the nozzle tip 5, By discharging the cooling medium from the cooling medium outlet 63, it is possible to always keep the cooling state. Therefore, the nozzle tip 5
Into the heated parison 9, even if it is a resin that requires high heat melting and does not slip easily at the mouth of the container, the carry-in portion 82 or the mouth of the container as shown in FIGS. Rough surface 81 is not formed. In particular, when a multi-container is molded, if the inner container is provided with a releasable function, it is necessary to use a releasable and flexible resin such as nylon or EVOH. Tip 5
Is cooled, so that even when the air blowing nozzle 4 is driven, the nozzle tip 5
Is not heated, so that the carry-in portion 82 and the rough surface 81 of the container mouth do not occur. Further, according to the present embodiment, an air blowing function is added to the drive pin 10,
Since there is no need to separately provide an air blowing groove or nozzle, the diameter of the air blowing nozzle 4 can be reduced. At this time, by forming the nozzle tip 5 as a separate body, even if the diameter of the blowing nozzle 4 is small, it is possible to secure a flow path for circulating the cooling medium in processing. For example, when the diameter of the container mouth part to be formed is about 10 mm, the diameter of the air blowing nozzle 4 can be about 15 mm at the part to be driven into the parison 9. The drive pin 10 slides over the entire through hole of the tubular main body 43, and although not shown, is sealed at two upper and lower locations inside the tubular main body. Since the driving pin 10 is held, the driving pin 10 has good stability and can slide smoothly. Therefore, the slidability can be improved as compared with a conventional one-point holding nozzle such as the air blowing nozzle 4 as shown in FIG.

[0016]

As described above, the blowing nozzle of the blow molding apparatus according to the present invention is a blowing nozzle (4) having a driving pin (10) slidable up and down in a cylindrical body (43). The driving pin (10) has a hollow interior so that gas can be blown from the upper end of the blowing nozzle (4), and the cooling medium circulates through the nozzle tip (5) of the blowing nozzle (4). By providing a cooling means (6) capable of cooling by
It is a resin having releasability such as nylon or EVOH, and has an effect that a liquid container or the like having a small-diameter container opening can be formed. In other words, the drive pin (10) not only has a function of pressing the bottom of the container but also has a hollow inside, so that air can also be blown. This eliminates the need to separately form a nozzle for blowing air. It is possible to reduce the pipe diameter of the blowing nozzle (4). Further, by providing the nozzle tip (5) as a separate body, even if the diameter of the blowing nozzle (4) is small, it is possible to secure a flow path for circulating the cooling medium.

Further, by providing a cooling means (6) that can be cooled by circulation of a cooling medium at the nozzle tip (5) of the blowing nozzle (4), the resin carry-in portion (82) at the container mouth and the container are provided. Rough surface with rough mouth (81)
Can be prevented from being formed. In particular, when the molding resin is made of nylon, EVOH, or the like having releasability and flexibility, high-temperature melting is necessary, and the resin itself is not easily slippery. At the mouth of the container, it is prevented from being heated by the cooling means (6).
This is particularly effective because the nozzle tip (5) does not become slippery. Further, the drive pin (10) blows air from the upper end of the blowing nozzle (4) by making the inside hollow, so that air can be blown into the container regardless of the position of the drive pin (10). It is possible to do.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a blowing nozzle of a blow molding apparatus according to an embodiment of the present invention.

FIG. 2 is an external view showing a state in which a blowing nozzle of the blow molding apparatus of FIG. 1 is driven into a container.

FIG. 3 is a partially enlarged cross-sectional view illustrating the vicinity of a cooling unit in FIG. 1;

FIG. 4 is a partially enlarged cross-sectional view showing a state where the tip of a multiple pipe blowing nozzle is driven into a container.

FIG. 5 is an enlarged sectional view taken along the line AA of FIG. 3;

FIG. 6 is a schematic view showing a molding step of the hollow molded container, and showing a state in which a parison is discharged from an extruder via a crosshead.

FIG. 7 is a schematic diagram showing a molding step of the hollow molded container, and showing a state in which a parison is sandwiched between molds.

FIG. 8 is a schematic diagram showing a molding step of the hollow molded container, showing a state in which the upper part of the parison pinched by a mold is pinched.

FIG. 9 is a schematic view showing a molding step of a hollow molded container, and showing a state in which a nozzle for blowing multiple pipes is driven into a container mouth.

FIG. 10 is a schematic diagram showing a molding step of the hollow molded container, and showing a state in which the bottom of the container is pressed by a rod of a nozzle for blowing multiple tubes.

FIG. 11 is a partially enlarged cross-sectional view showing a state in which the bottom of the inner container is connected to the bottom of the outer container with a rod when a double container is formed.

FIG. 12 is a cross-sectional view showing a state in which the tip of the nozzle is driven into the container mouth by the conventional nozzle for blowing multiple tubes.

FIG. 13 is a partial cross-sectional view showing a state in which a multi-tube blowing nozzle is taken out of the container of FIG.

FIG. 14 is a sectional view showing a blowing nozzle of a conventional blow molding apparatus.

FIG. 15 is a schematic diagram showing another conventional multi-tube blowing nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crosshead 2 Extruder 3 Die 3a, 3b Die 4 Blowing nozzle 41a, 41b Driving air supply port 42 Blowing air inlet 43 Cylindrical main body 5 Nozzle tip part 51 Screw part 6 Cooling means 61 Internal water channel 62 Cooling medium Inlet 63 Cooling medium outlet 64 Partition 65 Opening 8 Liquid container 8a Inner container 8b Outer container 8c Binding part 81 Rough surface 82 Carry-in part 9 Parison 10 Drive pin 10a Cylinder

Claims (5)

[Claims] 1. A blowing nozzle (4) having a driving pin (10) slidable up and down in a cylindrical body (43).
The drive pin (10) has a hollow interior so that gas can be blown from the upper end of the blowing nozzle (4), and the cooling medium circulates through the nozzle tip (5) of the blowing nozzle (4). A blowing nozzle for a blow molding apparatus, comprising a cooling means (6) capable of cooling by a cooling method. 2. A blowing nozzle for a blow molding apparatus according to claim 1, wherein the driving pin (10) supplies a pressure medium from a side surface of a cylindrical body (43) of the blowing nozzle (4). The cooling means (6) circulates a cooling medium through an internal channel (61) having an internal groove shape formed at the nozzle tip (5). Blowing nozzle for molding equipment. 3. The blowing nozzle of the blow molding device according to claim 1, wherein the nozzle tip (5) is separate from the cylindrical main body (43) of the blowing nozzle (4). A blow nozzle for a blow molding apparatus. 4. A driving pin (10) comprising a cylindrical body (43) formed of a multi-tube and a hollow rod body slidable up and down in a through hole formed in the axis of the cylindrical body (43). ), And an air drive supply port (41a, 41b) disposed on the side surface of the cylindrical main body (43) and driving the drive pin (10) by air.
And a blowing air inlet (4) through which air can be blown from the upper end of the air blowing nozzle (4) into the drive pin (10).
2) and a cooling means (6) disposed at the nozzle tip (5) and capable of cooling the nozzle tip (5). The nozzle tip (5) has a cylindrical body (43). ), Is tapered toward the front end side, and the rear end side of the nozzle front end (5) can be connected to the tubular main body (43) by screwing. (6) An internal water passage (61) through which a cooling medium can circulate at the nozzle tip (5) and an opening formed on the side surface of the cylindrical main body (43), which can communicate with the internal water passage (61), A cooling medium inlet (62) through which water can be injected and an opening formed on the other side surface of the cylindrical main body (43) to form an internal water passage (61).
Medium outlet (6) that can communicate with the
3) A blow nozzle for a blow molding apparatus, characterized by comprising: 5. A blowing nozzle for a blow molding apparatus according to claim 1, wherein the nozzle tip (5) of the blowing nozzle (4) has a diameter of about 15 mm. A blowing nozzle for a blow molding device, characterized in that it has a tapered shape.