Quick mold changing mechanism for blow molding machine

Abstract

The utility model discloses a quick die change mechanism for a blow molding machine, which comprises a fixed seat, a primary movable arm and a secondary movable arm, the fixed seat is used for being mounted on a rack of the blow molding machine, two ends of the primary movable arm are respectively hinged with the fixed seat and the secondary movable arm, a die taking rod is mounted at the tail end of the secondary movable arm, and the secondary movable arm is mounted on the die taking rod. A connector is arranged at the lower end of the mold taking rod, a T-shaped groove opening is transversely formed in the connector, the groove opening is communicated with a lifting hole below the connector, and an arc-shaped step part is arranged on the edge of the lifting hole. The die taking device is novel in structure, the fixing screw above the die can directly enter the nest notch of the connector at the lower end of the die taking rod, and then the first-stage movable arm and the second-stage movable arm are matched to move the die, so that the die is convenient to replace, and the sizes of the hinge rod and the die taking rod are coordinated and balanced; therefore, the device can be suitable for a narrow space in the blow molding machine under the condition that a basic bearing function is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of blow molding machines, and in particular to a quick mold changing mechanism for blow molding machines. Background Technology

[0002] In the production process of blow-molded products, the mold is the core component that determines the shape and specifications of the product. When the production task switches from one product to another, the mold must be changed accordingly. Currently, most blow molding companies rely on gantry cranes in the workshop for mold changing operations.

[0003] While this method achieves basic hoisting functionality, it has several limitations in practical application. First, the operation of gantry cranes requires specific building structures in the workshop, such as load-bearing beams and dedicated tracks, heavily relying on the initial supporting facilities of the factory. This mold-changing method is ineffective for older workshops without pre-installed hoisting equipment or in spaces with limited space. Second, in terms of efficiency, traditional suspended mold-changing is a typical sequential operation process. Operators must wait for the previous set of molds to be completely disassembled and hoisted to the storage area before starting the hoisting of the next set. This operational mode significantly increases equipment downtime, especially when production plans frequently change; the accumulated mold-changing time can even account for a considerable proportion of the equipment's effective operating time, directly reducing overall equipment utilization. Furthermore, suspended operations themselves require a high level of operator skill, and the risk of molds swinging in the air necessitates a cautious and slow process throughout the entire mold-changing process. In the industry trend towards flexible production and rapid response, this space-constrained and inefficient mold-changing method needs further upgrading. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a quick mold changing mechanism for blow molding machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a quick mold changing mechanism for a blow molding machine, comprising a fixed base, a primary movable arm, and a secondary movable arm. The fixed base is used to be installed on the frame of the blow molding machine. The two ends of the primary movable arm are respectively hinged to the fixed base and the secondary movable arm. A mold-taking rod is installed at the end of the secondary movable arm. A connector is provided at the lower end of the mold-taking rod. A T-shaped groove is opened laterally at the connector. The groove communicates with a lifting hole below the connector. The edge of the lifting hole is provided with an arc-shaped step.

[0006] To further elaborate, a first hinge rod is provided between the fixed base and the first-stage movable arm. A first limiting ring is provided in the middle of the first hinge rod. The upper end of the first limiting ring is provided with a first shaft portion for hinged with the first-stage movable arm, and the lower end of the first limiting ring is provided with a second shaft portion for hinged with the fixed base.

[0007] To further elaborate, a second hinge rod is provided between the first-stage movable arm and the second-stage movable arm. A second limiting ring is provided in the middle of the second hinge rod. A third shaft part for hinged with the second-stage movable arm is provided at the upper end of the second limiting ring. A fourth shaft part for hinged with the first-stage movable arm is provided at the lower end of the second limiting ring. The first shaft part of the first hinge rod and the fourth shaft part of the second hinge rod are of equal length.

[0008] To elaborate further, the inner diameter of the stepped portion is D1, the inner diameter of the lifting hole is D2, the ratio of D1 to D2 is K1, and the range of K1 is 0.6-0.7.

[0009] To further elaborate, the diameter of the third shaft portion of the second hinge rod is D3, the ratio of D2 to D3 is K2, the range of K2 is 0.3-0.4, and K1+K2 is less than 1.

[0010] To elaborate further, the thickness of the secondary movable arm is H1, and D3 / H1 is greater than 0.5.

[0011] To elaborate further, a first limiting cover is connected to the first hinge rod, and a second limiting cover is connected to the second hinge rod.

[0012] The beneficial effects of this utility model are as follows: This utility model has a novel structure. The fixing screws on the top of the mold can directly enter the groove of the connector at the lower end of the mold taking rod. Then, the mold is moved by the cooperation of the first-stage movable arm and the second-stage movable arm, which facilitates the replacement of the mold. Furthermore, the dimensions of the hinge rod and the mold taking rod are coordinated and balanced, so that it can be used in the narrow space inside the blow molding machine while achieving the basic load-bearing function. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model when applied to a blow molding machine.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model when applied to a blow molding machine.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model.

[0016] Figure 4 for Figure 3 An enlarged schematic diagram of point A.

[0017] Figure 5 This is a cross-sectional view of the mold-taking rod.

[0018] Figure 6 This is a cross-sectional view of the structure of this utility model.

[0019] Reference numerals: 10, fixed base; 20, primary movable arm; 30, secondary movable arm; 40, mold taking rod; 41, connector; 411, groove; 412, lifting hole; 413, step; 50, first hinge rod; 501, first limiting cover; 51, first shaft; 52, second shaft; 53, first limiting ring; 60, second hinge rod; 601, second limiting cover; 61, third shaft; 62, fourth shaft; 63, second limiting ring; 70, blow molding machine; 71, frame. Detailed Implementation

[0020] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0021] Combined with appendix Figure 1 To be continued Figure 3 As shown, a quick mold changing mechanism for a blow molding machine includes a fixed base 10, a primary movable arm 20, and a secondary movable arm 30. The fixed base 10 is installed on the frame 71 of the blow molding machine 70. The two ends of the primary movable arm 20 are hinged to the fixed base 10 and the secondary movable arm 30, respectively. A mold-removing rod 40 is installed at the end of the secondary movable arm 30. The mold-removing rod 40 is specifically used to lift the mold. (See attached diagram.) Figure 3 and attached Figure 4 As shown, the lower end of the take-up rod 40 is provided with a T-shaped recess 411, which is laterally opened at the connector 41. The recess 411 is connected to the lifting hole 412 below the connector 41. The edge of the lifting hole 412 is provided with an arc-shaped step 413. When changing the mold in the blow molding machine 70, the fixing screw above the mold can directly enter the recess 411 of the connector 41 at the lower end of the take-up rod 40 and sink into the recess 411. Then, the first-stage movable arm 20 and the second-stage movable arm 30 work together to move the mold, thereby facilitating the mold change.

[0022] Combined with appendix Figure 3 and attached Figure 6As shown, a first hinge rod 50 is provided between the fixed base 10 and the first-stage movable arm 20. A rolling bearing is specifically built into the first hinge rod 50. A first limiting ring 53 is provided in the middle of the first hinge rod 50. The upper end of the first limiting ring 53 has a first shaft portion 51 for hinged connection with the first-stage movable arm 20, and the lower end of the first limiting ring 53 has a second shaft portion 52 for hinged connection with the fixed base 10. The first limiting ring 53 serves as a boundary between the fixed base 10 and the first-stage movable arm 20. Both ends of the first hinge rod 50 can be directly inserted into the fixed base 10 and the first-stage movable arm 20.

[0023] A second hinge rod 60 is provided between the first-stage movable arm 20 and the second-stage movable arm 30. The second hinge rod 60 also has a built-in rolling bearing. A second limiting ring 63 is provided in the middle of the second hinge rod 60. The upper end of the second limiting ring 63 has a third shaft portion 61 for hinged with the second-stage movable arm 30, and the lower end of the second limiting ring 63 has a fourth shaft portion 62 for hinged with the first-stage movable arm 20. The first shaft portion 51 of the first hinge rod 50 and the fourth shaft portion 62 of the second hinge rod 60 are of equal length. A first limiting cover plate 501 is connected to the first hinge rod 50, and a second limiting cover plate 601 is connected to the second hinge rod 60.

[0024] The main design challenge of the quick mold change mechanism lies in how to coordinate the size proportions of each component while achieving the load-bearing function, so that it can be used in the narrow space inside the blow molding machine.

[0025] Combined with appendix Figure 3 To be continued Figure 6 As shown, the inner diameter of the step 413 is D1, the inner diameter of the lifting hole 412 is D2, and the ratio of D1 to D2 is K1, with K1 ranging from 0.6 to 0.7. In the design, this parameter K1 prevents the step 413 from being too narrow to hold the fixing screws at the mold, and also prevents the lifting hole 412 from being too large, causing significant shaking of the mold at the connector 41 during lifting. The diameter of the third shaft 61 of the second hinge rod 60 is D3, and the ratio of D2 to D3 is K2, with K2 ranging from 0.3 to 0.4, and K1 + K2 less than 1. In the design, the size of the lifting hole 412 directly affects the outer diameter of the mold-taking rod 40. This parameter K2 balances the dimensional relationship between the hinge rod and the mold-taking rod 40, preventing either from becoming too thick. Finally, the combination of K1 + K2 being less than 1 ensures that all dimensions are coordinated and balanced, thus enabling the quick mold-changing mechanism to be suitable for the confined space inside a blow molding machine while achieving basic load-bearing functionality.

[0026] In addition, the thickness of the secondary movable arm 30 is H1, and in a preferred case, D3 / H1 is preferably greater than 0.5.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 this utility model.

[0028] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information.

[0029] The above description does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A quick mold changing mechanism for a blow molding machine, characterized in that: The device includes a fixed base (10), a primary movable arm (20), and a secondary movable arm (30). The fixed base (10) is used to install on the frame (71) of the blow molding machine (70). The two ends of the primary movable arm (20) are respectively hinged to the fixed base (10) and the secondary movable arm (30). The end of the secondary movable arm (30) is equipped with a mold-taking rod (40). The lower end of the mold-taking rod (40) is provided with a connector (41). The connector (41) is provided with a T-shaped groove (411) in the transverse direction. The groove (411) is connected to the lifting hole (412) below the connector (41). The edge of the lifting hole (412) is provided with an arc-shaped step (413).

2. The quick mold changing mechanism for a blow molding machine according to claim 1, characterized in that: A first hinge rod (50) is provided between the fixed base (10) and the first-stage movable arm (20). A first limiting ring (53) is provided in the middle of the first hinge rod (50). The upper end of the first limiting ring (53) is provided with a first shaft part (51) for hinged with the first-stage movable arm (20). The lower end of the first limiting ring (53) is provided with a second shaft part (52) for hinged with the fixed base (10).

3. A quick mold changing mechanism for a blow molding machine according to claim 2, characterized in that: A second hinge rod (60) is provided between the first-stage movable arm (20) and the second-stage movable arm (30). A second limiting ring (63) is provided in the middle of the second hinge rod (60). A third shaft part (61) for hinged with the second-stage movable arm (30) is provided at the upper end of the second limiting ring (63). A fourth shaft part (62) for hinged with the first-stage movable arm (20) is provided at the lower end of the second limiting ring (63). The first shaft part (51) of the first hinge rod (50) and the fourth shaft part (62) of the second hinge rod (60) are of equal length.

4. A quick mold changing mechanism for a blow molding machine according to claim 3, characterized in that: The inner diameter of the step (413) is D1, the inner diameter of the lifting hole (412) is D2, the ratio of D1 to D2 is K1, and the range of K1 is 0.6-0.

7.

5. A quick mold changing mechanism for a blow molding machine according to claim 4, characterized in that: The diameter of the third shaft part (61) of the second hinge rod (60) is D3, the ratio of D2 to D3 is K2, the range of K2 is 0.3-0.4, and K1+K2 is less than 1.

6. A quick mold changing mechanism for a blow molding machine according to claim 5, characterized in that: The thickness of the secondary movable arm (30) is H1, and D3 / H1 is greater than 0.

5.

7. A quick mold changing mechanism for a blow molding machine according to claim 3, characterized in that: A first limiting cover (501) is connected to the first hinge rod (50), and a second limiting cover (601) is connected to the second hinge rod (60).

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