A plastic bottle blow molding die

Abstract

This utility model discloses a blow molding die for plastic bottles, relating to the field of blow molding die technology. The utility model includes a worktable, a movable component on the top of the worktable, a mold component on the top of the movable component, and a lifting component on the top of the worktable. The lifting end of the lifting component is equipped with an air blowing pipe and a clamping component, with the clamping end of the clamping component located outside the air blowing pipe. This utility model uses the lifting component to drive the air blowing pipe and the clamping component to move downwards synchronously. When the air blowing pipe reaches a predetermined position inside the plastic preform, the clamping component can clamp and seal the bottle opening of the plastic preform. This arrangement ensures that after the air blowing pipe transports gas into the plastic preform, the bottle opening of the plastic preform is less prone to expansion and deformation under the clamping force of the clamping component, while also preventing gas leakage, thus guaranteeing the blow molding effect of the plastic preform.

Description

Technical Field

[0001] This utility model belongs to the field of blow molding technology, and specifically relates to a blow molding mold for plastic bottles. Background Technology

[0002] In the plastic packaging industry, plastic bottles are widely used in beverages, cosmetics, pharmaceuticals, and other fields due to their advantages such as being lightweight, low-cost, and easy to process. Blow molding is a common method for producing plastic bottles, and the blow molding die, as a key component, directly affects the quality and production efficiency of the plastic bottles.

[0003] When molding plastic bottles in a blow mold, the operator usually inserts a high-pressure air blowing tube directly into the bottle mouth of the plastic preform. However, the seal between the air blowing tube and the bottle mouth of the preform is often insufficient. Especially in the later stages of blow molding, the bottle mouth of the preform is prone to expansion and deformation due to the air pressure inside the plastic preform. This phenomenon further aggravates the seal failure, resulting in high-pressure air leaking out from the gaps. The above phenomenon not only causes the loss of blowing pressure, but also directly affects the blow molding effect of the preform. Utility Model Content

[0004] To address the problem of insufficient sealing at the bottle mouth of the plastic preform in the high-pressure blowing tube, this utility model proposes a plastic bottle blow molding die to overcome the aforementioned technical problems existing in the relevant technologies.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a blow molding mold for plastic bottles, including a workbench, a moving component on the top of the workbench, a mold component on the top of the moving component, a lifting component on the top of the workbench, an air blowing pipe and a clamping component on the lifting end of the lifting component, and the clamping end of the clamping component is located on the outside of the air blowing pipe.

[0007] The moving component is used to move the mold assembly containing the plastic preform to the bottom end of the air blowing pipe. The lifting component is used to drive the air blowing pipe and the clamping component to move downward synchronously. When the air blowing pipe moves to a predetermined position inside the plastic preform, the clamping end of the clamping component clamps the bottle mouth of the plastic preform.

[0008] Furthermore, the moving component includes a drive screw, which is rotatably connected to the top of the worktable. A moving plate is threaded onto the outer surface of the drive screw. A fixed rod is fixedly connected to the top of the worktable and is movably connected to the moving plate. A drive motor is fixedly installed on one side of the worktable, and the drive end of the drive motor is fixedly connected to the drive screw.

[0009] Furthermore, the mold assembly includes a mounting frame, which is fixedly mounted on the top of the movable plate. Two mounting frames are symmetrically arranged on the movable plate. A push hydraulic cylinder is fixedly mounted on the outer side of each of the two mounting frames. The push end of the push hydraulic cylinder passes through the mounting frame and is fixedly connected to the mold. A guide rod is fixedly connected to the outer side of the mold, and the guide rod is movably connected to the corresponding mounting frame.

[0010] Furthermore, the lifting assembly includes a support frame, which is fixedly installed on the top of the workbench. A lifting hydraulic cylinder is fixedly installed on the top of the support frame. The lifting end of the lifting hydraulic cylinder passes through the support frame and is fixedly connected to a lifting plate. The air blowing pipe is fixedly connected to the lifting plate, and the bottom end of the air blowing pipe passes through the lifting plate.

[0011] Furthermore, the clamping assembly includes a sleeve, which is disposed on the outside of the air blowing pipe. A connecting plate is fixedly connected to the outside of the sleeve, and a T-shaped lifting rod is fixedly connected to the top of the connecting plate. The top end of the T-shaped lifting rod passes through the lifting plate, and a connecting spring is fixedly connected between the lifting plate and the top end of the T-shaped lifting rod. A limit plate is fixedly connected to the inner wall of the support frame corresponding to the connecting plate, and arc-shaped clamping plates are symmetrically arranged on the outside of the sleeve.

[0012] Furthermore, a movable frame is fixedly connected to the outer side of each of the two arc-shaped clamping plates, and several T-shaped support rods are fixedly connected to both sides of the connecting plate. The two movable frames are movably connected to the corresponding T-shaped support rods. Several push springs are fixedly connected between the connecting plate and the movable frames. The push springs are sleeved on the outer side of the T-shaped support rods. A wedge block is fixedly connected to the bottom of the lifting plate corresponding to the movable frame.

[0013] Furthermore, a limiting plate is fixedly connected to the outer surface of the T-shaped lifting rod, and the limiting plate is located on the upper side of the lifting plate.

[0014] This utility model has the following beneficial effects:

[0015] This invention uses a lifting component to move the air blowing pipe and the clamping component downwards synchronously. When the air blowing pipe moves to a predetermined position inside the plastic preform, the clamping component can clamp and seal the bottle opening of the plastic preform. The above arrangement ensures that after the air blowing pipe transports gas into the interior of the plastic preform, the bottle opening of the plastic preform is less likely to expand and deform under the clamping force of the clamping component, and also avoids gas leakage, thereby ensuring the effect of blow molding of the plastic preform.

[0016] This invention uses a connecting spring, a T-shaped lifting rod, and a connecting plate to enable the lifting plate to move the sleeve and the air blowing pipe downwards synchronously. When the sleeve moves to the bottle mouth of the plastic preform, the connecting plate stops moving at the limit position. At this time, the lifting plate continues to move the air blowing pipe downwards. Simultaneously, the two arc-shaped clamping plates cooperate with the sleeve to clamp and seal the bottle mouth of the plastic preform. In the above configuration, under the restriction of the sleeve, there is a certain distance between the air blowing pipe and the inner wall of the plastic preform, thereby preventing the air blowing pipe from puncturing the plastic preform during movement. At the same time, because the sleeve is in contact with the plastic preform, the sealing of the bottle mouth of the plastic preform can be guaranteed when the arc-shaped clamping plates complete the clamping of the plastic preform.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external outline structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the mobile component of this utility model;

[0021] Figure 3 This is a schematic diagram of the lifting component structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the clamping component structure of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle;

[0024] Figure 6 This is a schematic diagram of the connecting plate structure of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Workbench; 2. Moving assembly; 201. Drive screw; 202. Moving plate; 203. Fixed rod; 204. Drive motor; 3. Mold assembly; 301. Mounting frame; 302. Push hydraulic cylinder; 303. Mold; 304. Guide rod; 4. Lifting assembly; 401. Support frame; 402. Lifting hydraulic cylinder; 403. Lifting plate; 5. Air blowing pipe; 6. Clamping assembly; 601. Sleeve sleeve; 602. Connecting plate; 603. Connecting spring; 604. Limiting plate; 605. Arc-shaped clamping plate; 606. Moving frame; 607. Push spring; 608. Wedge block; 609. Limiting disc; 610. T-shaped lifting rod; 611. T-shaped support rod. Detailed Implementation

[0027] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0028] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0029] Please see Figures 1-6 As shown, this utility model is a blow molding mold for plastic bottles, including a workbench 1. A moving component 2 is provided on the top of the workbench 1. A mold component 3 is provided on the top of the moving component 2. A lifting component 4 is provided on the top of the workbench 1. An air blowing pipe 5 and a clamping component 6 are provided on the lifting end of the lifting component 4. The clamping end of the clamping component 6 is located on the outside of the air blowing pipe 5.

[0030] The moving component 2 is used to move the mold component 3 containing the plastic preform to the bottom end of the air blowing pipe 5. The lifting component 4 is used to drive the air blowing pipe 5 and the clamping component 6 to move downward synchronously. When the air blowing pipe 5 moves to a predetermined position inside the plastic preform, the clamping end of the clamping component 6 clamps the bottle mouth of the plastic preform.

[0031] The injection molding machine is installed on one side of the lifting assembly 4. After the injection molding machine puts the plastic preform into the mold assembly 3, the moving assembly 2 moves the mold assembly 3 containing the plastic preform to the lower side of the air blowing pipe 5. Then, the lifting assembly 4 moves the air blowing pipe 5 and the clamping assembly 6 downwards in sync, so that the air blowing pipe 5 moves into the interior of the plastic preform. When the lifting assembly 4 moves to the predetermined position, the clamping assembly 6 clamps and fixes the bottle mouth of the plastic preform, and then the air blowing pipe 5 transports gas into the interior of the plastic preform.

[0032] The lifting assembly 4 drives the air blowing pipe 5 and the clamping assembly 6 to move downwards synchronously. When the air blowing pipe 5 moves to the predetermined position inside the plastic preform, the clamping assembly 6 can clamp and seal the bottle mouth of the plastic preform. The above arrangement ensures that after the air blowing pipe 5 transports gas into the inside of the plastic preform, the bottle mouth of the plastic preform is not prone to expansion and deformation under the clamping force of the clamping assembly 6, and also avoids gas leakage, thereby ensuring the effect of blow molding of the plastic preform.

[0033] In one embodiment, the moving component 2 includes a drive screw 201 rotatably connected to the top of the worktable 1. A moving plate 202 is threadedly connected to the outer surface of the drive screw 201. A fixing rod 203 is fixedly connected to the top of the worktable 1 and is movably connected to the moving plate 202. A drive motor 204 is fixedly installed on one side of the worktable 1, and the drive end of the drive motor 204 is fixedly connected to the drive screw 201.

[0034] After the injection molding machine places the plastic preform into the mold assembly 3, the drive motor 204 drives the moving plate 202 through the drive screw 201, so that the moving plate 202 can move the mold assembly 3 to the lower side of the air blowing pipe 5. At the same time, since the fixed rod 203 can guide the moving plate 202, the stability of the moving plate 202 moving the mold assembly 3 is guaranteed. The above settings ensure that the air blowing pipe 5 will not cause obstruction when the plastic preform injected by the injection molding machine is moved into the mold assembly 3.

[0035] In one embodiment, the mold assembly 3 includes a mounting bracket 301, which is fixedly mounted on the top of the movable plate 202. Two mounting brackets 301 are symmetrically arranged on the movable plate 202. A push hydraulic cylinder 302 is fixedly mounted on the outer side of each of the two mounting brackets 301. The push end of the push hydraulic cylinder 302 passes through the mounting bracket 301 and is fixedly connected to the mold 303. A guide rod 304 is fixedly connected to the outer side of the mold 303, and the guide rod 304 is movably connected to the corresponding mounting bracket 301.

[0036] After the plastic preform moves between the two molds 303, the two hydraulic cylinders 302 can push the corresponding molds 303, so that the two molds 303 can close together. At the same time, the two molds 303 that are closed together can clamp and seal the bottom of the plastic preform, so that air will not flow out from the bottom of the plastic preform during subsequent blow molding.

[0037] In one embodiment, the lifting assembly 4 includes a support frame 401, which is fixedly installed on the top of the workbench 1. A lifting hydraulic cylinder 402 is fixedly installed on the top of the support frame 401. The lifting end of the lifting hydraulic cylinder 402 passes through the support frame 401 and is fixedly connected to a lifting plate 403. An air blowing pipe 5 is fixedly connected to the lifting plate 403, and the bottom end of the air blowing pipe 5 passes through the lifting plate 403.

[0038] One end of the air blowing pipe 5 is connected to an external air source. When the plastic preform moves to the lower side of the air blowing pipe 5, the lifting hydraulic cylinder 402 drives the air blowing pipe 5 downward through the lifting plate 403, so that the air blowing pipe 5 can move directly into the interior of the plastic preform. At this time, the external air source can transport gas to the interior of the plastic preform through the air blowing pipe 5, so that the plastic preform forms a plastic bottle under the action of air pressure and the restriction of the two molds 303.

[0039] In one embodiment, the clamping assembly 6 includes a sleeve 601 disposed on the outside of the air blowing pipe 5. A connecting plate 602 is fixedly connected to the outside of the sleeve 601. A T-shaped lifting rod 610 is fixedly connected to the top of the connecting plate 602. The top end of the T-shaped lifting rod 610 passes through a lifting plate 403. A connecting spring 603 is fixedly connected between the lifting plate 403 and the top end of the T-shaped lifting rod 610. A limiting plate 604 is fixedly connected to the inner wall of the support frame 401 corresponding to the connecting plate 602. Arc-shaped clamping plates 605 are symmetrically arranged on the outside of the sleeve 601.

[0040] The lifting plate 403, via the connecting spring 603, T-shaped lifting rod 610, and connecting plate 602, drives the sleeve 601 downwards, causing the sleeve 601 and the air blowing pipe 5 to move downwards synchronously. When the sleeve 601 reaches the bottle mouth of the plastic preform, the connecting plate 602 contacts the limiting plate 604. At this point, the connecting plate 602 no longer drives the sleeve 601 downwards. As the lifting plate 403 continues to drive the air blowing pipe 5 downwards, the T-shaped lifting rod 610 begins to pull the connecting spring 603 upwards. It continuously slides on the lifting plate 403. During this process, the two arc-shaped clamping plates 605 cooperate with the sleeve 601 to clamp and seal the bottle mouth of the plastic preform. In the above configuration, under the restriction of the sleeve 601, there is a certain distance between the air blowing pipe 5 and the inner wall of the plastic preform, thereby preventing the air blowing pipe 5 from puncturing the plastic preform during movement. At the same time, since the sleeve 601 is in contact with the plastic preform, the arc-shaped clamping plate 605 completes the clamping of the plastic preform, and the sealing of the bottle mouth of the plastic preform can be guaranteed.

[0041] In one embodiment, for the aforementioned arc-shaped clamping plate 605, a movable frame 606 is fixedly connected to the outer side of the arc-shaped clamping plate 605, and a plurality of T-shaped support rods 611 are fixedly connected to both sides of the connecting plate 602. The two movable frames 606 are movably connected to the corresponding T-shaped support rods 611. A plurality of push springs 607 are fixedly connected between the connecting plate 602 and the movable frame 606. The push springs 607 are sleeved on the outer side of the T-shaped support rods 611. A wedge block 608 is fixedly connected to the bottom of the lifting plate 403 corresponding to the movable frame 606.

[0042] As the lifting plate 403 moves downwards, when the two wedge blocks 608 come into contact with the corresponding moving frames 606, the two moving frames 606 can move synchronously towards the sleeve 601 under the pressure of the corresponding wedge blocks 608. At the same time, the two arc-shaped clamping plates 605 can clamp the bottle neck of the plastic preform under the push of the corresponding moving frames 606. After the blow molding of the plastic preform is completed, the lifting plate 403 moves upwards. When the two wedge blocks 608 no longer press the moving frames 606, at this time... The push spring 607 can push the movable frame 606, thereby causing the movable frame 606 to move under the guidance of the T-shaped support rod 611. At the same time, the two arc-shaped clamping plates 605 separate from the plastic preform. The above configuration means that only the lifting plate 403 needs to be driven to move the air pipe 5 into the interior of the plastic preform, while the arc-shaped clamping plates 605 automatically seal the bottle mouth of the plastic preform. During the final demolding, the excess plastic preform outside the mold 303 can be cut off by the cutting device.

[0043] In one embodiment, for the T-shaped lifting rod 610, a limiting plate 609 is fixedly connected to the outer surface of the T-shaped lifting rod 610, and the limiting plate 609 is disposed on the upper side of the lifting plate 403.

[0044] When the lifting plate 403 moves upward, the T-shaped lifting rod 610 can slide continuously on the lifting plate 403. When the limiting plate 609 comes into contact with the lifting plate 403, the lifting plate 403 can drive the T-shaped lifting rod 610 to move upward synchronously through the limiting plate 609. This allows the T-shaped lifting rod 610 to pull the sleeve 601 out of the plastic blank through the connecting plate 602. The setting of the limiting plate 609 ensures that the sleeve 601 will not shake due to the connecting spring 603 when it is pulled, thus further improving the overall stability of the equipment.

[0045] Through the above technical solution, 1. The lifting assembly 4 drives the air blowing pipe 5 and the clamping assembly 6 to move downwards synchronously. When the air blowing pipe 5 moves to the predetermined position inside the plastic preform, the clamping assembly 6 can clamp and seal the bottle mouth of the plastic preform. The above arrangement ensures that after the air blowing pipe 5 transports gas into the inside of the plastic preform, the bottle mouth of the plastic preform is not prone to expansion and deformation under the clamping force of the clamping assembly 6, and also avoids gas leakage, thereby ensuring the effect of blow molding of the plastic preform; 2. The connecting spring 603, T-shaped lifting rod 610 and connecting plate 602 cause the lifting plate 403 to drive the sleeve 601 to move downwards synchronously with the air blowing pipe 5. When the sleeve 601 moves to the bottle opening of the plastic preform, the connecting plate 602 and the limiting plate 604 stop moving. At this time, the lifting plate 403 continues to drive the air blowing pipe 5 to move downward. At the same time, the two arc-shaped clamping plates 605 cooperate with the sleeve 601 to clamp and seal the bottle opening of the plastic preform. In the above setting, under the restriction of the sleeve 601, there is a certain distance between the air blowing pipe 5 and the inner wall of the plastic preform, thereby avoiding the air blowing pipe 5 from puncturing the plastic preform during the movement. At the same time, since the sleeve 601 is in contact with the plastic preform, the sealing of the bottle opening of the plastic preform can be guaranteed when the arc-shaped clamping plates 605 complete the clamping of the plastic preform.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A plastic bottle blow mould comprising a worktable (1), characterised in that, The top of the workbench (1) is provided with a moving component (2), the top of the moving component (2) is provided with a mold component (3), the top of the workbench (1) is provided with a lifting component (4), the lifting end of the lifting component (4) is provided with an air blowing pipe (5) and a clamping component (6), and the clamping end of the clamping component (6) is located outside the air blowing pipe (5). The moving component (2) is used to move the mold component (3) containing the plastic preform to the bottom end of the air blowing pipe (5). The lifting component (4) is used to drive the air blowing pipe (5) and the clamping component (6) to move downward synchronously. When the air blowing pipe (5) moves to a predetermined position inside the plastic preform, the clamping end of the clamping component (6) clamps the bottle mouth of the plastic preform.

2. A plastic bottle blow mold as defined in claim 1, wherein The moving component (2) includes a drive screw (201), which is rotatably connected to the top of the workbench (1). A moving plate (202) is threaded onto the outer surface of the drive screw (201). A fixed rod (203) is fixedly connected to the top of the workbench (1). The fixed rod (203) is movably connected to the moving plate (202). A drive motor (204) is fixedly installed on one side of the workbench (1). The drive end of the drive motor (204) is fixedly connected to the drive screw (201).

3. A plastic bottle blow mold as defined in claim 2, wherein The mold assembly (3) includes a mounting frame (301), which is fixedly mounted on the top of the movable plate (202). Two mounting frames (301) are symmetrically arranged on the movable plate (202). A push hydraulic cylinder (302) is fixedly mounted on the outer side of each of the two mounting frames (301). The push end of the push hydraulic cylinder (302) passes through the mounting frame (301) and is fixedly connected to the mold (303). A guide rod (304) is fixedly connected to the outer side of the mold (303). The guide rod (304) is movably connected to the corresponding mounting frame (301).

4. A plastic bottle blow mold as defined in claim 1, wherein, The lifting assembly (4) includes a support frame (401), which is fixedly installed on the top of the workbench (1). A lifting hydraulic cylinder (402) is fixedly installed on the top of the support frame (401). The lifting end of the lifting hydraulic cylinder (402) passes through the support frame (401) and is fixedly connected to a lifting plate (403). The air blowing pipe (5) is fixedly connected to the lifting plate (403), and the bottom end of the air blowing pipe (5) passes through the lifting plate (403).

5. A plastic bottle blow mold as defined in claim 4, wherein, The clamping assembly (6) includes a sleeve (601), which is disposed on the outside of the air blowing pipe (5). A connecting plate (602) is fixedly connected to the outside of the sleeve (601). A T-shaped lifting rod (610) is fixedly connected to the top of the connecting plate (602). The top end of the T-shaped lifting rod (610) passes through the lifting plate (403). A connecting spring (603) is fixedly connected between the lifting plate (403) and the top end of the T-shaped lifting rod (610). A limit plate (604) is fixedly connected to the inner wall of the support frame (401) corresponding to the connecting plate (602). An arc-shaped clamping plate (605) is symmetrically arranged on the outside of the sleeve (601).

6. A plastic bottle blow mold as defined in claim 5, wherein, The outer sides of the two arc-shaped clamping plates (605) are fixedly connected to movable frames (606), and the two sides of the connecting plate (602) are fixedly connected to several T-shaped support rods (611). The two movable frames (606) are movably connected to the corresponding T-shaped support rods (611). Several push springs (607) are fixedly connected between the connecting plate (602) and the movable frames (606). The push springs (607) are sleeved on the outer side of the T-shaped support rods (611). The bottom of the lifting plate (403) is fixedly connected to the movable frames (606) with wedge blocks (608).

7. A plastic bottle blow mold as defined in claim 5, wherein The outer surface of the T-shaped lifting rod (610) is fixedly connected to a limiting plate (609), which is located on the upper side of the lifting plate (403).

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