Posterior handle bottle blowing structure

Abstract

The utility model discloses a kind of rear handle bottle blowing structure, belong to plastic container forming die technical field, the structure aims at solving the problem of traditional handle forming mechanism complex, low reliability, it is integrally arranged cylinder in mould, driving slider is slidably arranged in cylinder, driving slider is connected with movable buckle, the head of movable buckle can be extended into or exit handle cavity of mould.Gas port and second gas port are equipped on cylinder, by alternately passing into high-pressure gas to different gas port, movable buckle is reciprocated between extension position and retraction position.In bottle blowing, movable buckle is extended to prop open handle inner side space;After bottle blowing is completed, movable buckle is retracted to complete handle forming, the structure of the utility model is compact, integrated degree is high, action is reliable and control is accurate, effectively replace traditional complex mechanical linkage mechanism, improve production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of plastic container manufacturing technology, and more specifically, to a blow molding structure with a rear handle. Background Technology

[0002] In the plastic container manufacturing industry, especially for large-capacity packaging bottles requiring handles (such as cooking oil bottles, milk bottles, and laundry detergent bottles), blow molding is a common and efficient production process. During blow molding, to form a hollow, through-hole handle, a special molding mechanism is needed in the corresponding area of ​​the mold. Traditional handle molding mechanisms typically employ complex mechanical structures, such as using the opening and closing of the mold to drive the movement of a slider or insert within the mold via a linkage or cam mechanism, thereby forming the handle. These mechanical structures suffer from drawbacks such as complexity, difficult maintenance, and large space requirements. Therefore, the industry urgently needs a blow molding handle molding structure that is simpler in structure, more reliable in operation, and more flexible in control to improve production efficiency and product quality while reducing maintenance costs. Utility Model Content

[0003] The present invention provides a rear-handled blow molding structure that can alleviate the above-mentioned problems.

[0004] To alleviate the above problems, the technical solution adopted by this utility model is as follows:

[0005] A rear-handle blow molding structure is disposed within a blow molding die. The die includes a die body, which has a bottle cavity and a handle cavity. The structure further includes:

[0006] Integrated into the mold body cylinder;

[0007] A drive slider that can be reciprocated and slidably disposed within the cylinder;

[0008] And a movable latch connected to the drive slider, the head of the movable latch being able to extend into or retract from the handle cavity in response to the movement of the drive slider;

[0009] The cylinder is provided with a first air port and a second air port, which are used to introduce high-pressure gas to drive the drive slider to move the movable buckle back and forth between the extended position for opening the inner space of the handle and the retracted position for completing the final shaping of the handle.

[0010] Furthermore, the movable buckle includes two buckle portions spaced apart along the axial direction of the bottle body. These two buckle portions extend and retract synchronously to form a through-hole for gripping on the bottle handle.

[0011] Furthermore, the drive slider and the cylinder form a double-acting cylinder structure, which achieves reciprocating motion by alternately supplying air to different air ports.

[0012] Furthermore, the movable latch and the drive slider are either an integral structure or a separate connection structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The drive mechanism (cylinder, drive slider) is directly integrated into the mold body, eliminating the complex external mechanical linkage or cam system. The overall structure is very compact, reducing the external accessories of the mold, making the mold design simpler and lighter.

[0015] (2) The high-pressure cylinder directly drives the movable snap-fit, which has a fast pneumatic response speed and can achieve rapid extension and retraction independent of the mold opening and closing action. By precisely controlling the air supply sequence of the two air ports, the snap-fit ​​can be retracted at the best time during the blow molding process (such as after the high-pressure blow molding is completed), ensuring that the inner space of the handle is fully formed and the shape is beautiful, effectively avoiding defects such as plastic stringing or incomplete molding caused by untimely retraction.

[0016] (3) This structure has fewer moving parts, with only the drive slider making linear reciprocating motion within the cylinder. The transmission chain is short, and there are fewer wear points. Compared with complex mechanical linkage mechanisms, its operational stability and reliability are greatly improved. At the same time, the reduction in parts also makes daily maintenance and troubleshooting simpler and more convenient, significantly reducing maintenance costs and downtime. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the rear-handled blow molding structure, in which two movable fasteners are close together;

[0019] Figure 2 This is a cross-sectional view of the rear-handled blow molding structure, in which two movable buckles are spread open;

[0020] Figure 3 This is a schematic diagram of the appearance of the rear-handle blow molding structure;

[0021] In the diagram: 1-Mold body, 2-Modible latch, 3-Drive slider, 4-Cylinder, 5-First air port, 6-Second air port, 7-Handle cavity, 8-Bottle cavity. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be noted that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0023] Appendix Figures 1-3 This illustration shows a schematic diagram of a blow molding structure with a rear handle, mainly comprising a mold body 1 installed in a blow molding die. The mold body 1 has a bottle cavity 8 for forming the main body of the container and a handle cavity 7 for forming the lifting handle. The core of this invention lies in its novel handle forming structure.

[0024] Please see the appendix Figures 1-3 In this embodiment, the rear-handle blow molding structure has a cylinder 4 integrally integrated into the mold body 1. In this embodiment, the cylinder 4 is a chamber built into the mold body 1.

[0025] Inside the cylinder 4, there is a drive slider 3. The shape of the drive slider 3 matches the inner cavity of the cylinder 4 and can slide back and forth linearly within it.

[0026] The drive slider 3 is connected to a movable latch 2. The movable latch 2 is responsive to the movement of the drive slider 3, extending out from the inner wall of the handle cavity 7 or retracting completely to a position flush with or behind the inner wall. In this preferred embodiment, as... Figure 1 and 2 As shown, the movable buckle 2 includes two buckle parts spaced apart along the axial direction (i.e., the vertical direction) of the bottle body. These two buckle parts are respectively connected to a drive slider 3. The synchronous extension and retraction are achieved by controlling the cylinder 4, so as to form a complete and through grip hole on the bottle handle.

[0027] To drive the movement of this structure, the cylinder 4 has two air ports, namely the first air port 5 and the second air port 6. These two air ports are respectively connected to an external high-pressure air source control system. The drive slider 3 and the cylinder 4 together constitute a double-acting cylinder structure. When high-pressure gas is introduced from the first air port 5, the gas acts on one side of the drive slider 3, pushing the slider to move in a specific direction, thereby causing the movable latch 2 to extend and enter the "open latch" state. When high-pressure gas is introduced from the second air port 6, the gas acts on the other side of the drive slider 3, pushing the slider to move in the opposite direction, thereby pulling the movable latch 2 back and entering the "close latch" state.

[0028] The connection between the movable buckle 2 and the drive slider 3 can be flexible. For example, it can be integrally molded to ensure structural strength and transmission accuracy; or it can be designed as a split structure, connected by fasteners such as bolts and pins. This makes it easy to replace and repair the easily damaged movable buckle 2 separately, reducing maintenance costs.

[0029] The workflow of this structure is as follows:

[0030] Preparation stage / After mold closing: Before the blow molding process begins, the mold is closed. At this time, the control system introduces high-pressure gas into the first gas port 5.

[0031] Buckle extension: High-pressure gas pushes the drive slider 3, which in turn causes the movable buckle 2 to fully extend into the handle cavity 7, as shown. Figure 2 As shown. At this point, the movable latch 2 occupies space inside the future handle.

[0032] High-pressure blow molding: The heated preform is fed into the mold and blown under high pressure. The molten plastic expands under pressure, conforming to the inner walls of the bottle cavity 8 and the handle cavity 7, and also covering the protruding movable buckle 2, thus forming a hollow internal structure in the handle area.

[0033] Locking and retraction: After the bottle blowing is completed and a short period of pressure holding and cooling has been completed, the bottle body is basically shaped. The control system switches the gas path and introduces high-pressure gas into the second gas port 6, while the first gas port 5 exhausts gas.

[0034] Handle forming: High-pressure gas pushes the drive slider 3 to move in the opposite direction, quickly pulling the movable latch 2 back from the already formed handle, as shown. Figure 1 As shown, the space previously occupied by the latch retracts, forming a through handle hole.

[0035] Mold opening and part removal: After the movable buckle 2 is fully retracted, the mold opens and the finished bottle with the perfectly through-type handle can be taken out.

[0036] In summary, this utility model simplifies and optimizes the handle forming mechanism by highly integrating the pneumatic drive system inside the mold body and directly driving the movable latch with a cylinder. The operation is precise and reliable, providing an efficient and stable solution for producing high-quality blow-molded bottles with handles.

[0037] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A post handle blow molding structure, which is arranged in a blow molding die, the die comprising a die body (1) provided with a bottle body cavity (8) and a handle cavity (7), characterized in that, Also includes: Integrating into the mold body (1) and cylinder (4); A drive slider (3) is reciprocally slidably disposed within the cylinder (4); And a movable latch (2) connected to the drive slider (3), the head of the movable latch (2) being able to extend into or out of the handle cavity (7) in response to the movement of the drive slider (3); The cylinder (4) is provided with a first air port (5) and a second air port (6), which are respectively used to introduce high-pressure gas to drive the drive slider (3) to drive the movable buckle (2) to reciprocate between the extended position used to open the inner space of the handle and the retracted position used to complete the final forming of the handle.

2. The blow molding structure with a rear handle according to claim 1, characterized in that, The movable buckle (2) includes two buckle parts spaced apart along the axial direction of the bottle body. The two buckle parts extend and retract synchronously to form a through-hole for gripping on the bottle handle.

3. The blow molding structure with a rear handle according to claim 1, characterized in that, The drive slider (3) and the cylinder (4) constitute a double-acting cylinder structure, which achieves reciprocating motion by alternately supplying air to different air ports.

4. The blow molding structure with a rear handle according to claim 1, characterized in that, The movable latch (2) and the driving slider (3) are either an integral structure or a separate connection structure.

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