Cooling air ring for blow molding machine

Abstract

The utility model relates to the technical field of blow molding machines, and discloses a blow molding machine cooling air ring which comprises a ring body and a plurality of cooling pipes sequentially arranged in the circumferential direction of the ring body, a cooling cavity is formed in the ring body, one end of each cooling pipe extends into the cooling cavity, and the other end of each cooling pipe extends into the ring body. Each cooling pipe is provided with an air inlet located outside the ring body and an air outlet located in the inner circumferential face of the ring body, when film bubbles are cooled and shaped, external air supply equipment is communicated with the multiple cooling pipes, and then cold air is directly sprayed out through the cooling pipes to cool and shape the film bubbles. In the process, the condition that cold air needs to be shunted in the ring body is avoided, so that the air output of each cooling pipe is relatively uniform, and the cooling effect on the film bubbles is improved; when the temperature of the factory area is high, the cooling medium is conveyed into the cooling cavity so that the cooling medium can cool the cooling pipe, and therefore the temperature of cold air in the cooling pipe is reduced, the temperature difference between the cold air and the film bubbles is increased, and the cooling effect on the film bubbles is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of blow molding machines, and in particular relates to a cooling air ring for a blow molding machine. Background Art

[0002] Blow molding machine is a plastic processing machine, which sprays liquid plastic and then uses the wind from the machine to blow the plastic body into a mold cavity of a certain shape to make a product. The cooling air ring is an important part of the blow molding machine, responsible for cooling and shaping the inflated film bubble, which has a great impact on the quality and output of blown film products.

[0003] At present, the cooling air ring has an air cavity along its circumference, the inner wall has multiple air outlets connected to the air cavity, and the outer wall is provided with multiple air inlet pipes connected to the air cavity. When using the cooling air ring, the air supply device is connected to the air inlet pipe, and then the air supply device transports the cold air to the air cavity through the air inlet pipe, and then the cold air entering the air cavity is ejected through the air outlet and cools and shapes the film bubble. However, after the cold air enters the air cavity, it will move along the circumference of the air cavity and flow out through the air outlet at the same time. That is to say, after the cold air enters the air cavity, it will be divided into multiple strands and discharged through multiple air outlets. Since the distance between each air outlet and the air inlet pipe is different, the air output of the multiple air outlets is uneven, thereby affecting the uniform heat dissipation of the film bubble, resulting in poor cooling effect on the film bubble. At the same time, when the temperature of the factory area is high, the temperature of the cold air entering the air cavity will also increase accordingly, so that the temperature difference between the cold air and the film bubble is small, which also affects the cooling effect on the film bubble. Utility Model Content

[0004] The present application provides a cooling air ring for a blow molding machine to improve the cooling effect on film bubbles.

[0005] The technical solution adopted in this application is:

[0006] A cooling air ring for a blow molding machine comprises a ring body and a plurality of cooling pipes sequentially arranged along the circumference of the ring body, wherein the ring body has a cooling cavity inside, one end of each cooling pipe extends into the cooling cavity, and each cooling pipe has an air inlet located outside the ring body and an air outlet located on the inner circumference of the ring body.

[0007] By adopting the above technical scheme, when cooling and shaping the membrane bubble, the external air supply equipment is connected to multiple cooling pipes, and then the cold air is directly ejected through the cooling pipes to cool and shape the membrane bubble. In this process, the need for cold air to be diverted in the ring body is avoided, so that the air output of each cooling pipe is more uniform, so as to improve the cooling effect on the membrane bubble; when the temperature of the factory area is high, a cooling medium can be transported into the cooling chamber so that the cooling medium cools the cooling pipe to reduce the temperature of the cooling pipe, thereby reducing the temperature of the cold air in the cooling pipe, so as to increase the temperature difference between the cold air and the membrane bubble, thereby improving the cooling effect on the membrane bubble.

[0008] Optionally, the distance L between the circumferences of two adjacent cooling tubes and the radius R of the cooling tubes satisfy: L<R.

[0009] By adopting the above technical solution, since the distance between the circumferential surfaces of two adjacent cooling tubes is smaller than the radius of the cooling tubes, the distance between the two adjacent cooling tubes is reduced, so that the circumference of the membrane bubble is further evenly cooled, thereby further improving the cooling effect on the membrane bubble.

[0010] Optionally, the cooling cavity is arranged to extend along the circumference of the ring body.

[0011] By adopting the above technical solution, since the cooling cavity is arranged to extend along the circumference of the ring body, it is possible to facilitate the delivery of cooling medium to the cooling cavity, thereby avoiding the situation where multiple cooling cavities are arranged at intervals, which increases the difficulty of delivering cooling medium to the cooling cavity.

[0012] Optionally, a liquid inlet is provided at the bottom of the ring body, and a liquid outlet is provided at the top of the ring body, and the liquid inlet and the liquid outlet are respectively located on two opposite sides of the ring body.

[0013] By adopting the above technical solution, when conveying the cooling medium into the cooling chamber, the external cooling medium supply device is connected to the liquid inlet, and the external cooling medium recovery pipeline is connected to the liquid outlet, so that the cooling medium enters the cooling chamber through the liquid inlet, and is discharged through the liquid outlet after flowing in the cooling chamber. Since the liquid inlet and the liquid outlet are respectively located on opposite sides of the ring body, the flow path of the cooling medium in the cooling chamber is increased, so as to increase the cooling effect on the cooling pipe, thereby increasing the temperature difference between the cold air and the membrane bubble, so as to further improve the cooling effect on the membrane bubble.

[0014] Optionally, the ring body includes a lower shell and an upper cover detachably connected to the lower shell, and the lower shell has an annular groove so that the lower shell and the upper cover together form the cooling cavity.

[0015] By adopting the above technical solution, since the upper cover and the lower shell are detachably connected, the difficulty of installing the cooling pipe is reduced, thereby improving the assembly efficiency of the cooling air ring. At the same time, it can also facilitate the cleaning of scale in the cooling chamber to ensure the cooling effect of the cooling medium on the cooling pipe.

[0016] Optionally, fasteners threadedly connected to the lower shell are provided at the inner edge and the outer edge of the upper cover, and the fasteners located at the inner edge of the upper cover are staggered with the fasteners located at the outer edge of the upper cover.

[0017] By adopting the above technical solution, since the upper cover is provided with fasteners threadedly connected to the lower shell, the difficulty of assembling and disassembling the upper cover is reduced, and the efficiency of assembling and disassembling the upper cover is improved. At the same time, the fasteners at the inner edge of the upper cover and the fasteners at the outer edge of the upper cover are staggered, which increases the connection stability between the upper cover and the lower shell, thereby increasing the airtightness between the upper cover and the lower shell.

[0018] Optionally, the lower shell is provided with a connecting pipe extending upward, the connecting pipe extends into the upper cover, and the fastener is threadedly connected to the connecting pipe.

[0019] By adopting the above technical solution, when assembling the upper cover, the upper cover is first aligned with the connecting tube, and then the upper cover is moved downward, and then the connecting tube is plugged into the upper cover, and then the fastener is installed to make the fastener and the connecting tube threaded together. At the same time, the fastener presses the upper cover, so that the upper cover and the lower shell are tightly fitted together. By setting the connecting tube, the positioning of the upper cover is achieved, thereby increasing the connection stability between the upper cover and the lower shell.

[0020] Optionally, the upper cover has a sealing rib extending into the annular groove, and a side wall of the sealing rib abuts against a groove wall of the annular groove.

[0021] By adopting the above technical solution, after the upper cover is installed on the lower shell, the side wall of the sealing rib contacts the groove wall of the annular groove to increase the sealing matching area between the upper cover and the lower shell, thereby increasing the sealing between the upper cover and the lower shell, thereby ensuring the sealing of the cooling cavity and avoiding the cooling medium from overflowing from the cooling cavity.

[0022] Optionally, the sealing rib is provided with a sealing groove along its circumference, a sealing ring is provided in the sealing groove, and the sealing ring is pressed tightly against the groove wall of the annular groove.

[0023] By adopting the above technical solution, after the upper cover is installed on the lower shell, the sealing ring is pressed against the groove wall of the annular groove to further increase the sealing between the upper cover and the lower shell, thereby further avoiding the overflow of the cooling medium in the cooling chamber. At the same time, through the setting of the sealing groove, the relative sliding of the sealing ring and the upper cover can be avoided during the installation of the upper cover, thereby increasing the connection stability between the sealing ring and the upper cover, thereby reducing the difficulty of assembling the upper cover.

[0024] Optionally, it further includes a plurality of air supply pipes, each of which has an air distribution section and an air supply section, wherein both ends of the air distribution section are respectively connected to two adjacent cooling pipes, and the air supply section is located in the middle of the air distribution section.

[0025] By adopting the above technical scheme, since the two ends of the air distribution section are respectively connected to two adjacent cooling pipes, and the air supply section is located in the middle of the air distribution section, the cold air entering the air distribution section through the air supply section can enter the two cooling pipes evenly to ensure the uniformity of the cold air in each cooling pipe. At the same time, the number of required air supply equipment is reduced to reduce the use cost of the cooling air ring, and the number of pipelines is reduced to facilitate the maintenance of the cooling air ring.

[0026] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0027] 1. The cooling air ring in the present application includes a ring body and a plurality of cooling pipes arranged in sequence along the circumference of the ring body, the ring body having a cooling cavity inside, one end of each cooling pipe extending into the cooling cavity, and each cooling pipe having an air inlet located outside the ring body and an air outlet located on the inner circumference of the ring body. When cooling and shaping the membrane bubble, the external air supply equipment is connected to the plurality of cooling pipes, and then the cold air is directly ejected through the cooling pipes to cool and shape the membrane bubble. In this process, the need for the cold air to be diverted in the ring body is avoided, so that the air outlet of each cooling pipe is more uniform, so as to improve the cooling effect on the membrane bubble; when the temperature of the factory area is high, a cooling medium can be transported into the cooling cavity so that the cooling medium cools the cooling pipe, so as to reduce the temperature of the cooling pipe, thereby reducing the temperature of the cold air in the cooling pipe, so as to increase the temperature difference between the cold air and the membrane bubble, thereby improving the cooling effect on the membrane bubble.

[0028] 2. In the present application, the distance L between the circumferences of two adjacent cooling tubes and the radius R of the cooling tubes satisfy: L<R, thereby reducing the distance between the two adjacent cooling tubes to further evenly cool the circumference of the membrane bubble, thereby further improving the cooling effect on the membrane bubble.

[0029] 3. The cooling cavity in the present application is arranged to extend along the circumference of the ring body, thereby facilitating the delivery of cooling medium to the cooling cavity, thereby avoiding the situation where multiple cooling cavities are arranged at intervals, which increases the difficulty of delivering cooling medium to the cooling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 This is a schematic diagram of the structure of the cooling air ring described in one embodiment of the present application;

[0032] Figure 2 A partial cross-sectional view of the cooling air ring in one embodiment of the present application;

[0033] Figure 3 A cross-sectional view from another perspective of the cooling air ring in one embodiment of the present application;

[0034] Figure 4 for Figure 3 Magnified view of area A.

[0035] Reference numerals:

[0036] 1. Ring body; 11. Lower shell; 111. Cooling chamber; 112. Liquid inlet pipe; 113. Connecting pipe; 12. Upper cover; 121. Sealing rib; 122. Liquid outlet pipe; 123. Sealing ring; 2. Cooling pipe; 3. Fastener; 4. Air supply pipe; 41. Air distribution section; 42. Air supply section. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0039] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0042] Reference Figures 1 to 4 , discloses a cooling air ring for a blow molding machine, comprising a ring body 1 and a plurality of cooling tubes 2 sequentially arranged along the circumference of the ring body 1, wherein the ring body 1 has a cooling cavity 111 inside, one end of each cooling tube 2 extends into the cooling cavity 111, and each cooling tube 2 has an air inlet located outside the ring body 1 and an air outlet located on the inner circumference of the ring body 1.

[0043] When cooling and shaping the membrane bubble, the external air supply equipment is connected to multiple cooling tubes 2, and then the cold air is directly ejected through the cooling tubes 2 to cool and shape the membrane bubble. In this process, the need for cold air to be diverted in the ring body 1 is avoided, so that the air output of each cooling tube 2 is more uniform, so as to improve the cooling effect on the membrane bubble; when the temperature of the factory area is high, a cooling medium can be transported to the cooling chamber 111, so that the cooling medium cools the cooling tubes 2 to reduce the temperature of the cooling tubes 2, thereby reducing the temperature of the cold air in the cooling tubes 2, so as to increase the temperature difference between the cold air and the membrane bubble, thereby improving the cooling effect on the membrane bubble.

[0044] Reference Figure 2 In a preferred embodiment, the distance L between the circumferential surfaces of two adjacent cooling tubes 2 and the radius R of the cooling tube 2 satisfy: L<R, thereby reducing the distance between the two adjacent cooling tubes 2 to further make the circumference of the membrane bubble evenly cooled, thereby further improving the cooling effect on the membrane bubble.

[0045] The present application does not specifically limit the structure of the cooling chamber 111. Preferably, refer to Figure 2 The cooling cavity 111 is extended along the circumference of the ring body 1, so that it is easy to transport the cooling medium into the cooling cavity 111, so as to avoid the situation where a plurality of cooling cavities 111 are arranged at intervals, which increases the difficulty of transporting the cooling medium into the cooling cavity 111.

[0046] In other embodiments, a plurality of cooling cavities 111 are arranged at intervals along the circumference of the ring body 1 , that is, each cooling cavity 111 is independent of each other.

[0047] The present application does not specifically limit the cooling method of the cooling chamber 111 for the cooling tube 2. Preferably, refer to Figure 3 The bottom of the ring body 1 is provided with a liquid inlet, and the top of the ring body 1 is provided with a liquid outlet, and the liquid inlet and the liquid outlet are respectively located on opposite sides of the ring body 1. When conveying the cooling medium into the cooling chamber 111, the external cooling medium supply device is connected to the liquid inlet, and the external cooling medium recovery pipeline is connected to the liquid outlet, so that the cooling medium enters the cooling chamber 111 through the liquid inlet, and is discharged through the liquid outlet after flowing in the cooling chamber 111. Since the liquid inlet and the liquid outlet are respectively located on opposite sides of the ring body 1, the flow path of the cooling medium in the cooling chamber 111 is increased, so as to increase the cooling effect on the cooling tube 2, thereby increasing the temperature difference between the cold air and the membrane bubble, so as to further improve the cooling effect on the membrane bubble.

[0048] Further, see Figure 3 A liquid inlet pipe 112 is provided at the liquid inlet, and a liquid outlet pipe 122 is provided at the liquid outlet, so as to facilitate the communication between the external liquid supply device and the cooling chamber 111.

[0049] In other embodiments, the liquid inlet and the liquid outlet are eliminated, that is, the cooling medium injected into the cooling cavity 111 cannot circulate, so as to reduce the number of devices required to cooperate with the cooling air ring, thereby reducing the use cost of the cooling air ring.

[0050] The present application does not specifically limit the structure of the ring body 1, and it can adopt any one of the following embodiments:

[0051] Embodiment 1. In this embodiment, referring to Figure 3 and Figure 4The ring body 1 includes a lower shell 11 and an upper cover 12 detachably connected to the lower shell 11. The lower shell 11 has an annular groove so that the lower shell 11 and the upper cover 12 jointly form a cooling chamber 111, and the liquid inlet is arranged at the bottom of the lower shell 11, and the liquid outlet is arranged at the upper cover 12, thereby reducing the difficulty of installing the cooling pipe 2, thereby improving the assembly efficiency of the cooling air ring, and at the same time can also achieve the effect of facilitating the cleaning of scale in the cooling chamber 111, so as to ensure the cooling effect of the cooling medium on the cooling pipe 2.

[0052] The present application does not specifically limit the detachable connection method between the upper cover 12 and the lower shell 11. Preferably, refer to Figure 3 and Figure 4 , fasteners 3 threadedly connected to the lower shell 11 are provided at the inner edge and the outer edge of the upper cover 12, and the fasteners 3 located at the inner edge of the upper cover 12 are staggered with the fasteners 3 located at the outer edge of the upper cover 12, thereby reducing the difficulty of assembling and disassembling the upper cover 12 and improving the assembly and disassembly efficiency of the upper cover 12. At the same time, the fasteners 3 at the inner edge of the upper cover 12 and the fasteners 3 located at the outer edge of the upper cover 12 are staggered, which increases the connection stability between the upper cover 12 and the lower shell 11, so as to increase the airtightness between the upper cover 12 and the lower shell 11.

[0053] The present application does not specifically limit the structure of the fastener 3. Preferably, the fastener 3 is a hexagon socket bolt, and the upper cover 12 is provided with a hidden groove for accommodating the bolt head of the hexagon socket bolt to increase the flatness of the top end surface of the cooling air ring. In other embodiments, the fastener 3 can also be a screw.

[0054] Further, see Figure 3 and Figure 4 The lower shell 11 is provided with a connecting pipe 113 extending upward, the connecting pipe 113 extends into the upper cover 12, and the fastener 3 is threadedly connected with the connecting pipe 113. When assembling the upper cover 12, the upper cover 12 is first aligned with the connecting pipe 113, and then the upper cover 12 is lowered, and then the connecting pipe 113 is plugged and matched with the upper cover 12, and then the fastener 3 is installed, so that the fastener 3 and the connecting pipe 113 are threadedly connected together, and at the same time, the fastener 3 presses the upper cover 12, so that the upper cover 12 and the lower shell 11 are tightly fitted together. The upper cover 12 is positioned by the setting of the connecting pipe 113, thereby increasing the connection stability of the upper cover 12 and the lower shell 11.

[0055] Further, see Figure 3 and Figure 4The upper cover 12 has a sealing rib 121 extending into the annular groove. After the upper cover 12 is installed on the lower shell 11, the side wall of the sealing rib 121 contacts the groove wall of the annular groove to increase the sealing matching area between the upper cover 12 and the lower shell 11, thereby increasing the sealing between the upper cover 12 and the lower shell 11, and further ensuring the sealing of the cooling chamber 111, and preventing the cooling medium from overflowing the cooling chamber 111.

[0056] Further, refer to Figure 3 and Figure 4 The outer wall of the sealing rib 121 and the inner wall of the annular groove are both provided with sealing grooves along their circumferences, and a sealing ring 123 is provided in the sealing groove. After the upper cover 12 is assembled to the lower shell 11, the sealing ring 123 located on the upper cover 12 is pressed against the groove wall of the annular groove, and the sealing ring 123 located in the annular groove is pressed against the sealing rib 121, so as to further increase the sealing between the upper cover 12 and the lower shell 11, thereby further avoiding the overflow of the cooling medium in the cooling chamber 111. At the same time, through the setting of the sealing groove, the sealing ring 123 and the upper cover 12 are prevented from sliding relative to each other during the installation of the upper cover 12, thereby increasing the connection stability of the sealing ring 123 and the upper cover 12, so as to reduce the difficulty of assembling the upper cover 12.

[0057] Preferably, a sealing ring 123 is also provided on the end surface of the lower shell 11 facing the upper cover 12 to further increase the sealing between the lower shell 11 and the upper cover 12 , thereby further increasing the sealing of the cooling chamber 111 .

[0058] Embodiment 2: In this embodiment, the ring body 1 is an integrated structure to reduce the number of components required to be assembled when assembling the cooling air ring, thereby improving the assembly efficiency of the cooling air ring.

[0059] In a preferred embodiment, referring to Figure 1 and Figure 2 The cooling air ring also includes multiple air supply pipes 4, which have an air dividing section 41 and an air supply section 42. The two ends of the air dividing section 41 are respectively connected to two adjacent cooling pipes 2, and the air supply section 42 is located in the middle of the air dividing section 41, so that the cold air entering the air dividing section 41 through the air supply section 42 enters the two cooling pipes 2 evenly to ensure the uniformity of the cold air in each cooling pipe 2, and at the same time reduce the number of required air supply equipment to reduce the use cost of the cooling air ring, and at the same time make the number of pipelines less, so as to achieve the effect of facilitating the maintenance of the cooling air ring.

[0060] Furthermore, the air supply pipe 4 is provided with multiple circles, and the two ends of the air distribution section 41 located in the outer circle are respectively connected to two adjacent air supply sections 42 located in the inner circle, so as to further reduce the number of air supply equipment required, so as to further reduce the use cost of the cooling air ring.

[0061] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0062] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0063] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A cooling air ring for a blow molding machine, characterized in that: The invention comprises a ring body (1) and a plurality of cooling tubes (2) arranged in sequence along the circumference of the ring body (1); the ring body (1) has a cooling cavity (111) inside, one end of each cooling tube (2) extends into the cooling cavity (111), and each cooling tube (2) has an air inlet located outside the ring body (1) and an air outlet located on the inner circumference of the ring body (1).

2. A cooling air ring for a blow molding machine according to claim 1, characterized in that: The distance L between the circumferential surfaces of two adjacent cooling pipes (2) and the radius R of the cooling pipe (2) satisfy: L<R.

3. A cooling air ring for a blow molding machine according to claim 1, characterized in that: The cooling cavity (111) is arranged to extend along the circumference of the ring body (1).

4. A cooling air ring for a blow molding machine according to claim 1, characterized in that: The bottom of the ring body (1) is provided with a liquid inlet, and the top of the ring body (1) is provided with a liquid outlet, and the liquid inlet and the liquid outlet are respectively located on two opposite sides of the ring body (1).

5. A cooling air ring for a blow molding machine according to claim 1, characterized in that: The ring body (1) comprises a lower shell (11) and an upper cover (12) detachably connected to the lower shell (11); the lower shell (11) has an annular groove, so that the lower shell (11) and the upper cover (12) together form the cooling cavity (111).

6. A cooling air ring for a blow molding machine according to claim 5, characterized in that: Fasteners (3) threadedly connected to the lower shell (11) are provided at the inner edge and the outer edge of the upper cover (12); the fasteners (3) located at the inner edge of the upper cover (12) and the fasteners (3) located at the outer edge of the upper cover (12) are staggered.

7. A cooling air ring for a blow molding machine according to claim 6, characterized in that: The lower shell (11) is provided with a connecting pipe (113) extending upwards, the connecting pipe (113) extends into the upper cover (12), and the fastener (3) is threadedly connected to the connecting pipe (113).

8. A cooling air ring for a blow molding machine according to claim 5, characterized in that: The upper cover (12) has a sealing rib (121) extending into the annular groove, and a side wall of the sealing rib (121) abuts against a groove wall of the annular groove.

9. A cooling air ring for a blow molding machine according to claim 8, characterized in that: The sealing rib (121) is provided with a sealing groove along its circumference, a sealing ring (123) is provided in the sealing groove, and the sealing ring (123) is tightly pressed against the groove wall of the annular groove.

10. A cooling air ring for a blow molding machine according to claim 1, characterized in that: It also includes a plurality of air supply pipes (4), wherein the air supply pipe (4) has an air distribution section (41) and an air supply section (42), wherein both ends of the air distribution section (41) are respectively connected to two adjacent cooling pipes (2), and the air supply section (42) is located in the middle of the air distribution section (41).

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