Plastic bottle blow molding device

Abstract

The utility model discloses a plastic bottle blow molding device, which belongs to the technical field of plastic bottle production, and comprises a base, a split mold, a split cylinder, a first nozzle, an air cooling mechanism, a moving table and a lifting mechanism, the lifting mechanism is mounted on the moving table and used for driving the first nozzle to move up and down, a hot air pipe is mounted on the lifting mechanism, and the first nozzle is arranged at one end of the hot air pipe; the air cooling mechanism comprises a fixing plate, a second motor and a connecting rod, the fixing plate is fixed to the moving table, the second motor is installed on the fixing plate, the connecting rod is a transverse rod, one end of the connecting rod is connected with an output shaft of the second motor, and a second nozzle is installed at the other end of the connecting rod and used for blowing cold air into the plastic bottles; and the second motor is used for driving the second nozzle to rotate above the split mold. The plastic bottle demoulding device solves the problem that plastic bottles are difficult to demould.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bottle production, and more specifically, to a plastic bottle blow molding device. Background Art

[0002] Plastic bottles are mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. Plastic bottles are widely made of polyester (PET), polyethylene (PE), and polypropylene (PP) as raw materials, and are mainly obtained by blow molding, extrusion blow molding or injection molding.

[0003] In the process of using the existing blow molding device for plastic bottles, the preform is generally placed in the split mold first, and then hot air is blown into the preform through the nozzle after the split mold is closed. However, after the preform is blown, the plastic bottle is tightly attached to the inner wall of the mold. If it is not cooled down before demolding, it is easy to be difficult to demold and the plastic bottle is easily damaged.

[0004] In view of this, the utility model provides a novel plastic bottle blow molding device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model aims to provide a plastic bottle blow molding device to solve the problem of difficulty in demoulding the plastic bottle.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A plastic bottle blow molding device, comprising a base, a split mold, a pull cylinder and a first nozzle, wherein the pull cylinder is used to drive the split mold to move horizontally to achieve opening or closing, the split mold is arranged on the base, the first nozzle is used to blow hot compressed air to the bottle blank placed in the split mold, and also includes an air cooling mechanism, a moving platform and a lifting mechanism;

[0008] The lifting mechanism is mounted on the moving platform and is used to drive the first nozzle to move up and down. A hot air pipe is mounted on the lifting mechanism, and the first nozzle is arranged at one end of the hot air pipe.

[0009] The air cooling mechanism includes a fixed plate, a second motor and a connecting rod. The fixed plate is fixed on the movable platform, the second motor is installed on the fixed plate, the connecting rod is a cross bar and one end of the connecting rod is connected to the output shaft of the second motor, and the other end is equipped with a second nozzle, the second nozzle is used to blow cold air into the plastic bottle, the output shaft of the second motor is vertically arranged to the connecting rod, and the second motor is used to drive the second nozzle to rotate above the split mold.

[0010] It is further preferred that: the lifting mechanism comprises a lifting cylinder and a fixing plate;

[0011] The lifting cylinder is installed on the moving platform and is used to drive the fixed plate to move up and down. The fixed plate is fixed at the connection between the hot air pipe and the first nozzle. The first nozzle is located above the split mold.

[0012] It is further preferred that: it also includes a driving mechanism for driving the movable platform to move horizontally above the split mold.

[0013] It is further preferred that: the driving mechanism comprises a first motor, a support plate, a lead screw and a guide rod;

[0014] Side plates are fixed on opposite sides of the base, two support plates are provided, the two support plates are respectively located on opposite sides of the base and fixed between the two side plates, the first motor is mounted on the support plates, one end of the lead screw passes through the support plate and is connected to the output shaft of the first motor, and the other end is inserted on the other support plate, the guide rod is fixed between the two support plates, the moving platform is sleeved on the lead screw and cooperates with the lead screw thread, and the guide rod passes through the moving platform.

[0015] It is further preferred that the length direction of the lead screw is perpendicular to the horizontal moving direction of the split mold.

[0016] Further preferably, a cooling pipe is provided in the split mold, and the cooling pipe is close to the inner wall of the split mold.

[0017] It is further preferred that: cold water circulates in the cooling pipe.

[0018] Further preferably, a feed opening is provided on the base and passes through the base from top to bottom, and the feed opening is located below the split mold.

[0019] In summary, the utility model has the following beneficial effects: when the preform is placed in the split mold, the split mold is closed, the first motor is started, and the lead screw rotates to move the movable platform horizontally toward the split mold until the first nozzle moves to the top opening of the split mold, i.e., the mouth of the preform, and then the lifting cylinder is driven to insert the first nozzle into the mouth of the preform to blow-mold the preform to obtain a plastic bottle. After the blow molding of the plastic bottle is completed, the first nozzle moves up, and the second motor is started to rotate the second nozzle to the top opening of the split mold, i.e., directly above the mouth of the plastic bottle, and then cold air is blown downward through the second nozzle. Under the coordinated action of the second nozzle and the cooling pipe, the plastic bottle is rapidly cooled. After the split mold is opened, the plastic bottle will be demoulded smoothly. It is simple and convenient to use, and solves the problem of difficult demoulding of plastic bottles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the structure in the embodiment, which is mainly used to reflect the overall structure of the blow molding device;

[0021] Figure 2 It is a structural schematic diagram of the embodiment, which is mainly used to reflect the arrangement structure of the first nozzle and the air cooling mechanism;

[0022] Figure 3 It is a top view schematic diagram in the embodiment, which is mainly used to reflect the setting structure of the driving mechanism;

[0023] Figure 4 It is a cross-sectional schematic diagram in the embodiment, which is mainly used to illustrate the setting structure of the cooling pipe.

[0024] In the figure, 1. base; 2. support leg; 3. side plate; 4. driving mechanism; 41. first motor; 42. support plate; 43. lead screw; 44. guide rod; 5. moving table; 6. air cooling mechanism; 61. fixed plate; 62. second motor; 63. connecting rod; 64. second nozzle; 7. first nozzle; 8. lifting mechanism; 81. lifting cylinder; 82. fixed seat; 9. cooling pipe; 10. split mold; 11. pulling cylinder; 12. hot air pipe; 13. sleeve; 14. extension part; 15. perforation; 16. feed port. DETAILED DESCRIPTION

[0025] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] Embodiment: A plastic bottle blow molding device, such as Figure 1-4 As shown, it includes a base 1, a split mold 10, a pulling cylinder 11, a first nozzle 7, an air cooling mechanism 6, a moving platform 5, a lifting mechanism 8, and a driving mechanism 4 for driving the moving platform 5 to move horizontally above the split mold 10. The pulling cylinder 11 is installed on the top surface of the base 1 and is used to drive the split mold 10 to move horizontally to realize the opening or closing of the split mold 10. The split mold 10 is composed of two half molds, and each half mold is driven by a pair of pulling cylinders 11. The split mold 10 is set on the base 1 and is horizontally slidably arranged with the top surface of the base 1. For the convenience of plastic bottle unloading, preferably, a discharge port 16 is opened on the base 1 and passes through the base 1 from top to bottom, and the discharge port 16 is located below the split mold 10. The bottom of the base 1 is provided with legs 2, and the legs 2 are symmetrically arranged on opposite sides of the base 1.

[0027] The lifting mechanism 8 is mounted on the moving platform 5 and is used to drive the first nozzle 7 to move up and down. The lifting mechanism 8 is equipped with a hot air pipe 12. The first nozzle 7 is arranged at one end of the hot air pipe 12. The first nozzle 7 is used to blow hot compressed air to the preform placed in the split mold 10. Preferably, the lifting mechanism 8 includes a lifting cylinder 81 and a fixed seat 82. The lifting cylinder 81 is mounted on the moving platform 5 and is used to drive the fixed seat 82 to move up and down so that the first nozzle 7 extends downward into the split mold 10. The fixed seat 82 is fixed at the connection between the hot air pipe 12 and the first nozzle 7. The first nozzle 7 is located above the split mold 10. The lifting cylinder 81 is fixed with a sleeve 13. The sleeve 13 is sleeved on the hot air pipe 12. The sleeve 13 is fixedly connected to the hot air pipe 12, and the hot air pipe 12 is connected to the external cold air supply system. The air cooling mechanism 6 includes a fixed plate 61, a second motor 62 and a connecting rod 63. The fixed plate 61 is fixed on the moving platform 5, and the second motor 62 is mounted on the fixed plate 61. The connecting rod 63 is a horizontal rod and one end is connected to the output shaft of the second motor 62, and the other end is equipped with a second nozzle 64, and the output shaft of the second motor 62 is arranged vertically to the connecting rod 63. The second nozzle 64 is located above the split mold 10 and is used to blow cold air into the plastic bottle. The second nozzle 64 is connected to the external cold air supply system, and the second motor 62 is used to drive the second nozzle 64 to rotate above the split mold 10. When the second nozzle 64 rotates to the top of the top opening of the split mold 10, that is, the opening of the plastic bottle, it starts to blow cold air downward, and the height of the second nozzle 64 is lower than the height of the first nozzle 7.

[0028] Preferably, the driving mechanism 4 includes a first motor 41, a support plate 42, a lead screw 43 and a guide rod 44. Side plates 3 are fixed on opposite sides of the base 1, and two support plates 42 are provided. The two support plates 42 are respectively located on opposite sides of the base 1 and are fixed between the two side plates 3. The first motor 41 is mounted on the support plate 42, one end of the lead screw 43 passes through the support plate 42 and is connected to the output shaft of the first motor 41, and the other end is inserted into the other support plate 42. The lead screw 43 is arranged horizontally and its length direction is perpendicular to the horizontal moving direction of the split mold 10. The guide rod 44 is arranged parallel to the lead screw 43 and fixed between the two support plates 42. The moving platform 5 is sleeved on the lead screw 43 and is threadedly matched with the lead screw 43. The guide rod 44 passes through the moving platform 5. Specifically, an extension portion 14 is integrally provided on the moving platform 5, and a through hole 15 for the guide rod 44 to pass through is opened on the extension portion 14.

[0029] In order to improve the cooling efficiency and demould smoothly, preferably, a cooling pipe 9 is provided in the split mold 10, and the cooling pipe 9 is close to the inner wall of the split mold 10. There is circulating cold water in the cooling pipe 9, and the cooling pipe 9 is connected to the external cold water circulation system.

[0030] Working process and principle: When the preform is placed in the split mold 10, the split mold 10 is closed, the first motor 41 is started, and the lead screw 43 rotates to make the moving platform 5 move horizontally toward the split mold 10 until the first nozzle 7 moves to the top opening of the split mold 10, that is, the bottle mouth of the preform. At this time, the lifting cylinder 81 is driven to insert the first nozzle 7 into the bottle mouth of the preform so as to blow the preform into a plastic bottle. After the blow molding of the plastic bottle is completed, the first nozzle 7 moves up, and the second motor 62 is started to rotate the second nozzle 64 to the top opening of the split mold 10, that is, just above the bottle mouth of the plastic bottle. At this time, cold air is blown downward through the second nozzle 64. Under the coordinated action of the second nozzle 64 and the cooling pipe 9, the plastic bottle is rapidly cooled. After the split mold 10 is opened, the plastic bottle will be demoulded smoothly, which is simple and convenient to use.

[0031] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A plastic bottle blow molding device, comprising a base (1), a split mold (10), a pull cylinder (11) and a first nozzle (7), wherein the pull cylinder (11) is used to drive the split mold (10) to move horizontally to achieve opening or closing, the split mold (10) is arranged on the base (1), and the first nozzle (7) is used to blow hot compressed air to a bottle blank placed in the split mold (10), characterized in that: It also includes an air cooling mechanism (6), a moving platform (5) and a lifting mechanism (8); The lifting mechanism (8) is installed on the movable platform (5) and is used to drive the first nozzle (7) to move up and down, a hot air pipe (12) is installed on the lifting mechanism (8), and the first nozzle (7) is arranged at one end of the hot air pipe (12); The air cooling mechanism (6) comprises a fixed plate (61), a second motor (62) and a connecting rod (63); the fixed plate (61) is fixed on the movable platform (5); the second motor (62) is mounted on the fixed plate (61); the connecting rod (63) is a cross bar and one end of the cross bar is connected to the output shaft of the second motor (62); the other end of the cross bar is provided with a second nozzle (64); the second nozzle (64) is used for blowing cold air into the plastic bottle; the output shaft of the second motor (62) is arranged perpendicular to the connecting rod (63); the second motor (62) is used for driving the second nozzle (64) to rotate above the split mold (10).

2. A plastic bottle blow molding device according to claim 1, characterized in that: The lifting mechanism (8) comprises a lifting cylinder (81) and a fixing seat (82); The lifting cylinder (81) is installed on the movable platform (5) and is used to drive the fixed seat (82) to move up and down. The fixed seat (82) is fixed at the connection between the hot air pipe (12) and the first nozzle (7). The first nozzle (7) is located above the split mold (10).

3. A plastic bottle blow molding device according to claim 2, characterized in that: It also includes a driving mechanism (4) for driving the movable platform (5) to move horizontally above the split mold (10).

4. A plastic bottle blow molding device according to claim 3, characterized in that: The driving mechanism (4) comprises a first motor (41), a support plate (42), a lead screw (43) and a guide rod (44); Side plates (3) are fixed on opposite sides of the base (1); two support plates (42) are provided, and the two support plates (42) are respectively located on opposite sides of the base (1) and fixed between the two side plates (3); the first motor (41) is mounted on the support plates (42); one end of the lead screw (43) passes through the support plate (42) and is connected to the output shaft of the first motor (41); the other end is inserted into the other support plate (42); the guide rod (44) is fixed between the two support plates (42); the moving platform (5) is sleeved on the lead screw (43) and threadedly matched with the lead screw (43); the guide rod (44) passes through the moving platform (5).

5. A plastic bottle blow molding device according to claim 4, characterized in that: The length direction of the lead screw (43) is perpendicular to the horizontal moving direction of the split mold (10).

6. A plastic bottle blow molding device according to claim 1, characterized in that: A cooling pipe (9) is arranged inside the split mold (10), and the cooling pipe (9) is close to the inner wall of the split mold (10).

7. A plastic bottle blow molding device according to claim 6, characterized in that: The cooling pipe (9) contains circulating cold water.

8. A plastic bottle blow molding device according to claim 1, characterized in that: The base (1) is provided with a feed opening (16) which passes through the base (1) vertically, and the feed opening (16) is located below the split mold (10).

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