Bottle bottom half-mold driving device and extrusion blow molding mold

Abstract

A bottle bottom half-mold driving device and an extrusion blow molding mold comprise a bottle bottom half-mold driving mechanism and a bottle bottom half-mold balancing mechanism which are connected with a bottle bottom half-mold, and the bottle bottom half-mold driving mechanism drives the bottle bottom half-mold to move up and down in the longitudinal axis direction. The left side and the right side of the bottle bottom half mold moving up and down in the longitudinal axis direction are kept balanced through the bottle bottom half mold balance mechanism; the bottle bottom half mold is driven by the bottle bottom half mold driving air cylinder, overall balance movement is achieved under the guiding effect of the bottle bottom half mold balance mechanism, the bottle bottom half mold balance mechanism specifically utilizes the sequential meshing effect of a first rack, a first gear, a second gear and a second rack, the balance of the bottle bottom half mold in the moving process is further guaranteed, and the service life of the bottle bottom half mold is prolonged. The problem of unbalance of the bottle bottom half-mold driving air cylinder in the driving process is solved, abrasion between the bottle bottom half-mold and the bottle body half-mold during mold closing is reduced, it can be guaranteed that the bottle bottom half-mold is closed in place, and the forming effect of a container is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to a bottle bottom half-mold driving device and an extrusion blow molding mold. Background Art

[0002] In existing extrusion blow molding molds, the bottom half mold is generally driven by a cylinder to move along the longitudinal axis to close and open the bottom half mold. In actual work, it is found that if the bottom half mold is driven only by a cylinder, the bottom half mold is prone to imbalance. For example:

[0003] 1. When the bottom half mold is driven by only one cylinder to move along the longitudinal axis, if the structure of the bottom half mold is asymmetrical, the bottom half mold will be unbalanced to a certain extent;

[0004] 2. When the bottle bottom half mold is driven by two cylinders on both sides to move along the longitudinal axis, if the two cylinders cannot be driven synchronously with high precision, the bottle bottom half mold will also be unbalanced to a certain extent.

[0005] If the bottom half mold is unbalanced, the bottom half mold will collide with the body half mold when closing the mold, which accelerates the wear of the bottom half mold and the body half mold, reduces the service life of the bottom half mold and the body half mold, and may not close the mold in place, affecting the molding effect of the container. Utility Model Content

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a bottle bottom half-mold driving device and an extrusion blow molding mold.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A bottle bottom half mold driving device comprises a bottle bottom half mold driving mechanism and a bottle bottom half mold balancing mechanism respectively connected to the bottle bottom half molds, wherein the bottle bottom half mold driving mechanism drives the bottle bottom half mold to move up and down along the longitudinal axis direction, and the bottle bottom half mold balancing mechanism keeps the left and right sides of the bottle bottom half mold moving up and down along the longitudinal axis direction balanced.

[0009] In the utility model, the bottle bottom half-mold balancing mechanism comprises a first rack, a first gear, a second gear and a second rack which are sequentially meshed and arranged along the horizontal axis direction;

[0010] The first rack extends along the longitudinal axis, is connected to the left outer side of the bottle bottom half mold, and can move up and down along the longitudinal axis;

[0011] The first gear and the second gear are fixed in sequence along the horizontal axis direction;

[0012] The second rack extends along the longitudinal axis, is connected to the right outer side of the bottle bottom half mold, and can move up and down along the longitudinal axis.

[0013] In the utility model, the bottle bottom half mold driving mechanism includes a bottle bottom half mold driving cylinder, the driving end of the bottle bottom half mold driving cylinder is connected to the bottom center of the bottle bottom half mold, and drives the bottle bottom half mold to move up and down along the longitudinal axis direction;

[0014] Alternatively, the bottle bottom half mold driving mechanism includes two bottle bottom half mold driving cylinders, and the driving ends of the two bottle bottom half mold driving cylinders are respectively connected to the left and right sides of the bottle bottom half mold, and synchronously drive the bottle bottom half mold to move up and down along the longitudinal axis.

[0015] Based on the above-mentioned bottle bottom half mold driving device, the utility model also provides an extrusion blow molding mold, including two side molds that are mirror-symmetrical along the parting surface, the side mold including a bottle mouth half mold, a bottle body half mold and a bottle bottom half mold arranged in sequence along the longitudinal axis direction, the bottle mouth half mold is connected to the top of the bottle body half mold, and the side mold also includes the above-mentioned bottle bottom half mold driving device. Under the drive of the bottle bottom half mold driving device, the bottle bottom half mold can be moved along the longitudinal axis direction to be connected to the bottle body half mold.

[0016] In the utility model, the inner side of the bottle mouth half mold has a bottle mouth half cavity, the inner side of the bottle body half mold has a bottle body half cavity, and the inner side of the bottle bottom half mold has a bottle bottom half cavity; when the bottle bottom half mold moves along the longitudinal axis direction to connect with the bottle body half mold, the bottle mouth half cavity, the bottle body half cavity and the bottle bottom half cavity are connected to form a half mold cavity; when the two side molds are connected along the parting surface, the two half mold cavities of the two side molds are combined to form a mold cavity for container molding.

[0017] In the utility model, the side mold also includes a back plate, the bottle mouth half mold and the bottle body half mold are fixed on the inner side of the back plate, and the bottle bottom half mold driving device is arranged on the inner side of the back plate, and drives the bottle bottom half mold to move up and down along the longitudinal axis direction on the inner side of the back plate.

[0018] In the utility model, a first rack groove and a second rack groove are provided on the inner side of the back plate along the longitudinal axis direction, and the first rack groove and the second rack groove are respectively located on the left and right sides of the longitudinal axis centerline of the back plate and are connected through the gear groove;

[0019] The first rack is slidably disposed in the first rack groove along the longitudinal axis direction, the second rack is slidably disposed in the second rack groove along the longitudinal axis direction, and the first gear and the second gear are sequentially fixed in the gear grooves along the transverse axis direction.

[0020] In the utility model, a slide rail is arranged on the inner side of the back plate along the center line of the longitudinal axis thereof, a slider matched with the slide rail is arranged on the outer side of the center of the bottle bottom half mold, and the bottle bottom half mold moves along the longitudinal axis direction on the inner side of the back plate based on the sliding fit between the slider and the slide rail;

[0021] Alternatively, two slide rails are arranged on the inner side of the back plate along the longitudinal axis direction, and the two slide rails are respectively located on the left and right sides of the longitudinal axis center line of the back plate, and sliders adapted to the slide rails are respectively arranged on the left outer side and the right outer side of the bottle bottom half mold, and the bottle bottom half mold moves on the inner side of the back plate along the longitudinal axis direction based on the sliding fit between the sliders on the left and right sides and the slide rails.

[0022] In the present invention, the first rack groove and the second rack groove are symmetrical about the longitudinal center line of the back plate; the two slide rails are symmetrical about the longitudinal center line of the back plate.

[0023] In the present invention, when the bottle bottom half mold driving mechanism is a bottle bottom half mold driving cylinder, the bottle bottom half mold driving cylinder is fixed on the inner side of the back plate and is located below the center of the bottle bottom half mold, a cylinder connection block is provided at the bottom center of the bottle bottom half mold, and the driving end of the bottle bottom half mold driving cylinder is connected to the cylinder connection block;

[0024] When the bottle bottom half mold driving mechanism is two bottle bottom half mold driving cylinders, the two bottle bottom half mold driving cylinders are respectively fixed on the left and right sides of the bottle body half mold, and cylinder connecting blocks are respectively provided on the left and right sides of the bottle bottom half mold, and the driving ends of the two bottle bottom half mold driving cylinders are respectively connected to the cylinder connecting blocks on the left and right sides of the bottle bottom half mold.

[0025] The beneficial effects of the utility model are as follows: the bottle bottom half mold is driven by the bottle bottom half mold driving cylinder, and under the guidance of the bottle bottom half mold balancing mechanism, the overall balanced movement is achieved, and the bottle bottom half mold balancing mechanism specifically utilizes the sequential meshing action of the first rack, the first gear, the second gear and the second rack, so that the balance of the bottle bottom half mold during movement is further guaranteed, the imbalance problem caused by the bottle bottom half mold driving cylinder during the driving process is eliminated, the wear between the bottle bottom half mold and the bottle body half mold during mold closing is reduced, and it can ensure that the bottle bottom half mold is in place for mold closing, thereby ensuring the molding effect of the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation structure of the bottle bottom half-mold driving mechanism of this embodiment;

[0027] Figure 2 Schematic diagram of the structure of the side mold of this embodiment. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0029] like Figure 1 and Figure 2 As shown, this embodiment discloses a bottle bottom half mold driving device, comprising a bottle bottom half mold driving mechanism and a bottle bottom half mold balancing mechanism respectively connected to the bottle bottom half mold 12, the bottle bottom half mold driving mechanism drives the bottle bottom half mold 12 to move up and down along the longitudinal axis direction, and the bottle bottom half mold balancing mechanism keeps the left and right sides of the bottle bottom half mold 12 moving up and down along the longitudinal axis direction balanced. The bottle bottom half mold 12 is installed on the inner side of the back plate 13 through the bottle bottom half mold balancing mechanism, the bottle bottom half mold driving mechanism is connected to the bottle bottom half mold 12, drives the bottle bottom half mold 12 to move up and down along the longitudinal axis direction on the inner side of the back plate 13, and the bottle bottom half mold 12 moves in a balanced manner under the guidance of the bottle bottom half mold balancing mechanism, so that the bottle bottom half mold 12 keeps the overall balance when moving.

[0030] Specifically, the bottle bottom half mold balancing mechanism comprises a first rack 41, a first gear 42, a second gear 43 and a second rack 44 which are meshed in sequence in the transverse direction, the first rack 41 and the second rack 44 are slidably arranged on the inner side of the back plate 13, the first gear 42 and the second gear 43 are rotatably arranged on the inner side of the back plate 13, and the first rack 41 and the second rack 44 are both connected to the bottle bottom half mold 12. The first rack 41 extends along the longitudinal direction, is connected to the left outer side of the bottle bottom half mold 12 and can move up and down along the longitudinal direction; the first gear 42 and the second gear 43 are fixed in sequence along the transverse direction; the second rack 44 extends along the longitudinal direction, is connected to the right outer side of the bottle bottom half mold 12 and can move up and down along the longitudinal direction. When the bottle bottom half mold driving mechanism pushes the bottle bottom half mold 12 to move, the bottle bottom half mold 12 drives the first rack 41 and the second rack 44 to move up and down along the longitudinal axis. Under the meshing action between the first rack 41, the first gear 42, the second gear 43 and the second rack 44, the bottle bottom half mold 12 maintains balanced movement as a whole.

[0031] Specifically, the first rack 41 and the second rack 44 are respectively arranged on both sides of the longitudinal center line of the back plate 13 and are symmetrical about the longitudinal center line of the back plate 13 , which can make the movement of the bottle bottom half mold 12 more balanced.

[0032] In this embodiment, the bottle bottom half mold driving mechanism includes one or two bottle bottom half mold driving cylinders 11. When the bottle bottom half mold driving mechanism includes one bottle bottom half mold driving cylinder 11, this scheme is not shown in the accompanying drawings. The driving end of the bottle bottom half mold driving cylinder 11 is connected to the bottom center of the bottle bottom half mold 12, driving the bottle bottom half mold 12 to move up and down along the longitudinal axis. The bottle bottom half mold driving cylinder 11 pushes the bottle bottom half mold 12 from the bottom center of the bottle bottom half mold 12 to move up and down along the longitudinal axis on the inner side of the back plate 13. When the bottle bottom half mold driving mechanism includes two bottle bottom half mold driving cylinders 11, the driving ends of the two bottle bottom half mold driving cylinders 11 are respectively connected to the left and right sides of the bottle bottom half mold 12, and the bottle bottom half mold 12 is synchronously driven to move up and down along the longitudinal axis. The two bottle bottom half mold driving cylinders 11 push the bottle bottom half mold 12 from the left and right sides of the bottle bottom half mold 12 to move up and down along the longitudinal axis on the inner side of the back plate 13, so that the movement of the bottle bottom half mold 12 is more balanced.

[0033] Based on the bottle bottom half mold driving device disclosed in this embodiment, this embodiment also discloses an extrusion blow molding mold, including two side molds 1 that are mirror-symmetrical along the parting surface, the side mold 1 includes a bottle mouth half mold 14, a bottle body half mold 15 and a bottle bottom half mold 12 arranged in sequence along the longitudinal axis direction, and the bottle mouth half mold 14 is connected to the top of the bottle body half mold 15; the side mold 1 also includes a back plate 13 and a bottle bottom half mold driving device, and under the drive of the bottle bottom half mold driving device, the bottle bottom half mold 12 can be moved along the longitudinal axis direction to connect with the bottle body half mold 15. The bottle bottom half mold driving mechanism of the bottle bottom half mold driving device is connected to the bottle bottom half mold 12, and the bottle bottom half mold balancing mechanism of the bottle bottom half mold driving device is movably installed in the side mold 1, and the bottle bottom half mold 12 is connected to the bottle bottom half mold balancing mechanism. When the bottle bottom half-mold driving mechanism drives the bottle bottom half-mold 12 to move, the bottle bottom half-mold 12 maintains balanced movement under the guidance of the bottle bottom half-mold balancing mechanism, thereby eliminating the imbalance problem of the bottle bottom half-mold driving cylinder 11 during the driving process, reducing the wear between the bottle bottom half-mold 12 and the bottle body half-mold 15 when closing the mold, and ensuring that the bottle bottom half-mold 12 is closed in place to ensure the molding effect of the container.

[0034] Specifically, the inner side of the mouth half mold 14 has a mouth half cavity, the inner side of the body half mold 15 has a body half cavity, and the inner side of the bottom half mold 12 has a bottom half cavity; the mouth half mold 14 and the body half mold 15 are fixed on the inner side of the back plate 13, and the mouth half cavity is connected with the body half cavity; the bottom half mold driving device is arranged on the inner side of the back plate 13, and drives the bottom half mold 12 to move up and down along the longitudinal axis direction on the inner side of the back plate 13. When the bottom half mold 12 moves along the longitudinal axis direction to connect with the body half mold 15, the bottom half cavity is connected with the body half cavity, and the mouth half cavity, the body half cavity, and the bottom half cavity are connected to form a half cavity; when the two side molds 1 are connected along the parting surface, the two half cavities of the two side molds are combined to form a cavity for container molding.

[0035] Specifically, a first rack groove 131 and a second rack groove 132 are provided on the inner side of the back plate 13 along the longitudinal axis direction. The first rack groove 131 and the second rack groove 132 are respectively located on the left and right sides of the longitudinal axis center line of the back plate 13 and are connected through the gear groove 133; the first rack 41 is slidably provided in the first rack groove 131 along the longitudinal axis direction to limit the sliding of the first rack 41; the second rack 44 is slidably provided in the second rack groove 132 along the longitudinal axis direction to limit the sliding of the second rack 44; thereby, the bottle bottom half mold 12 maintains balanced movement as a whole under the cooperation of the first rack 41 and the first rack groove 131, the second rack 44 and the second rack groove 132. The two ends of the gear groove 133 are respectively connected to the first rack groove 131 and the second rack groove 132, and the first gear 42 and the second gear 43 are fixed in the gear groove 133 in sequence along the horizontal axis direction, so that the first rack 41 and the first gear 42, the first gear 42 and the second gear 43, and the second gear 43 and the second rack 44 are fully meshed, and the inner sides of the first rack 41, the first gear 42, the second gear 43 and the second rack 44 are flush. Preferably, the gear groove 133 extends along the horizontal axis direction, and the first gear 42 and the second gear 43 are arranged along the horizontal axis direction.

[0036] In this embodiment, in order to further improve the balance of the movement of the bottle bottom half mold 12, a slide rail 134 is provided on the inner side of the back plate 13 along the longitudinal axis direction, and a slider 121 adapted to the slide rail 134 is provided on the outer side of the bottle bottom half mold 12. The bottle bottom half mold 12 moves along the longitudinal axis direction on the inner side of the back plate 13 based on the sliding fit between the slider 121 and the slide rail 134. Specifically, the number of the slide rails 134 can be one, two or more, and correspondingly, one, two or more sliders 121 adapted to the slide rail 134 are also provided. When the back plate 13 is provided with one slide rail 134, the slide rail 134 is provided along the longitudinal center line of the back plate 13, and a slider 121 adapted to the slide rail 134 is provided on the outer side of the center of the bottle bottom half mold 12. The bottle bottom half mold 12 moves along the longitudinal axis direction on the inner side of the back plate 13 based on the sliding fit between the slider 121 and the slide rail 134.

[0037] Two slide rails 134 are arranged on the inner side of the back plate 13 along the longitudinal axis direction, and the two slide rails 134 are respectively located on the left and right sides of the longitudinal axis center line of the back plate 13. The left outer side and the right outer side of the bottle bottom half mold 12 are respectively provided with sliders 121 adapted to the slide rails 134. The bottle bottom half mold 12 moves on the inner side of the back plate 13 along the longitudinal axis direction based on the sliding fit between the sliders 121 on the left and right sides and the slide rails 134.

[0038] When the back plate 13 is provided with two or more slide rails 134 , the slide rails 134 are distributed in parallel and at intervals in the transverse direction of the back plate 13 , so that the movement of the bottle bottom half mold 12 is more balanced.

[0039] Preferably, the first rack groove and the second rack groove are symmetrical about the longitudinal center line of the back plate; the two slide rails are symmetrical about the longitudinal center line of the back plate.

[0040] In this embodiment, in order to facilitate the connection between the bottle bottom half mold 12 and the bottle bottom half mold driving cylinder 11, a cylinder connecting block 122 is provided at the connection between the bottle bottom half mold 12 and the bottle bottom half mold driving cylinder 11, and the driving end of the bottle bottom half mold driving cylinder 11 is connected to the cylinder connecting block 122.

[0041] Specifically, when the bottom half mold driving mechanism is a bottom half mold driving cylinder 11, the bottom half mold driving cylinder 11 is fixed to the inner side of the back plate 13 and is located below the center of the bottom half mold 12. A cylinder connecting block 122 is provided at the bottom center of the bottom half mold 12. The driving end of the bottom half mold driving cylinder 11 is connected to the cylinder connecting block 122.

[0042] When the bottle bottom half mold driving mechanism consists of two bottle bottom half mold driving cylinders 11, the two bottle bottom half mold driving cylinders 11 are respectively fixed on the left and right sides of the bottle body half mold 12, and cylinder connecting blocks 122 are respectively provided on the left and right sides of the bottle bottom half mold 12, and the driving ends of the two bottle bottom half mold driving cylinders 11 are respectively connected to the cylinder connecting blocks 122 on the left and right sides of the bottle bottom half mold 12.

[0043] In this embodiment, the inner side refers to the side of the parting surface facing the side mold 1 , and the outer side refers to the side of the parting surface facing away from the side mold 1 .

[0044] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the protection scope of the present invention.

Claims

1. A bottle bottom half mold driving device, characterized in that: The invention comprises a bottle bottom half-mold driving mechanism and a bottle bottom half-mold balancing mechanism respectively connected to the bottle bottom half-mold, wherein the bottle bottom half-mold driving mechanism drives the bottle bottom half-mold to move up and down along the longitudinal axis, and the bottle bottom half-mold balancing mechanism keeps the left and right sides of the bottle bottom half-mold moving up and down along the longitudinal axis balanced.

2. A bottle bottom half mold driving device according to claim 1, characterized in that: The bottle bottom half mold balancing mechanism comprises a first rack, a first gear, a second gear and a second rack that are sequentially meshed and arranged along the horizontal axis direction; The first rack extends along the longitudinal axis, is connected to the left outer side of the bottle bottom half mold, and can move up and down along the longitudinal axis; The first gear and the second gear are fixed in sequence along the horizontal axis direction; The second rack extends along the longitudinal axis, is connected to the right outer side of the bottle bottom half mold, and can move up and down along the longitudinal axis.

3. A bottle bottom half mold driving device according to claim 1, characterized in that: The bottle bottom half mold driving mechanism comprises a bottle bottom half mold driving cylinder, the driving end of which is connected to the bottom center of the bottle bottom half mold, and drives the bottle bottom half mold to move up and down along the longitudinal axis direction; Alternatively, the bottle bottom half mold driving mechanism includes two bottle bottom half mold driving cylinders, and the driving ends of the two bottle bottom half mold driving cylinders are respectively connected to the left and right sides of the bottle bottom half mold, and synchronously drive the bottle bottom half mold to move up and down along the longitudinal axis.

4. An extrusion blow molding die, characterized in that: The invention comprises two side molds which are mirror-symmetrical along the parting surface, wherein the side mold comprises a bottle mouth half mold, a bottle body half mold and a bottle bottom half mold which are sequentially arranged along the longitudinal axis direction, wherein the bottle mouth half mold is connected to the top of the bottle body half mold, and the side mold further comprises a bottle bottom half mold driving device as claimed in any one of claims 1 to 3, wherein the bottle bottom half mold can be moved along the longitudinal axis direction to be connected to the bottle body half mold under the driving of the bottle bottom half mold driving device.

5. An extrusion blow molding die according to claim 4, characterized in that: The inner side of the bottle mouth half mold has a bottle mouth half cavity, the inner side of the bottle body half mold has a bottle body half cavity, and the inner side of the bottle bottom half mold has a bottle bottom half cavity; when the bottle bottom half mold moves along the longitudinal axis direction to connect with the bottle body half mold, the bottle mouth half cavity, the bottle body half cavity and the bottle bottom half cavity are connected to form a half mold cavity; when the two side molds are connected along the parting surface, the two half mold cavities of the two side molds are combined to form a mold cavity for container molding.

6. An extrusion blow molding die according to claim 4, characterized in that: The side mold also includes a back plate, the bottle mouth half mold and the bottle body half mold are fixed on the inner side of the back plate, and the bottle bottom half mold driving device is arranged on the inner side of the back plate, and drives the bottle bottom half mold to move up and down along the longitudinal axis direction on the inner side of the back plate.

7. An extrusion blow molding die according to claim 6, characterized in that: The inner side of the back plate is provided with a first rack groove and a second rack groove along the longitudinal axis direction, wherein the first rack groove and the second rack groove are respectively located on the left and right sides of the longitudinal axis centerline of the back plate and are connected through the gear groove; The first rack is slidably disposed in the first rack groove along the longitudinal axis direction, the second rack is slidably disposed in the second rack groove along the longitudinal axis direction, and the first gear and the second gear are sequentially fixed in the gear grooves along the transverse axis direction.

8. An extrusion blow molding die according to claim 7, characterized in that: A slide rail is arranged on the inner side of the back plate along the center line of the longitudinal axis, a slider matched with the slide rail is arranged on the outer side of the center of the bottle bottom half mold, and the bottle bottom half mold moves along the longitudinal axis direction on the inner side of the back plate based on the sliding fit between the slider and the slide rail; Alternatively, two slide rails are arranged on the inner side of the back plate along the longitudinal axis direction, and the two slide rails are respectively located on the left and right sides of the longitudinal axis center line of the back plate, and sliders adapted to the slide rails are respectively arranged on the left outer side and the right outer side of the bottle bottom half mold, and the bottle bottom half mold moves on the inner side of the back plate along the longitudinal axis direction based on the sliding fit between the sliders on the left and right sides and the slide rails.

9. An extrusion blow molding die according to claim 8, characterized in that: The first rack groove and the second rack groove are symmetrical about the longitudinal center line of the back plate; the two slide rails are symmetrical about the longitudinal center line of the back plate.

10. An extrusion blow molding die according to claim 6, characterized in that: When the bottle bottom half mold driving mechanism is a bottle bottom half mold driving cylinder, the bottle bottom half mold driving cylinder is fixed on the inner side of the back plate and is located below the center of the bottle bottom half mold, a cylinder connection block is provided at the bottom center of the bottle bottom half mold, and the driving end of the bottle bottom half mold driving cylinder is connected to the cylinder connection block; When the bottle bottom half mold driving mechanism is two bottle bottom half mold driving cylinders, the two bottle bottom half mold driving cylinders are respectively fixed on the left and right sides of the bottle body half mold, and cylinder connecting blocks are respectively provided on the left and right sides of the bottle bottom half mold, and the driving ends of the two bottle bottom half mold driving cylinders are respectively connected to the cylinder connecting blocks on the left and right sides of the bottle bottom half mold.

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