Linkage device for shoe last forming mold

Abstract

The novel shoe last forming mold has a linkage device comprising an upper mold, a bottom mold, and side mold elements disposed on both sides of the bottom mold. The key feature is that each side mold element is accompanied by a linkage device, which includes a frame, at least one linkage assembly, and an actuator. The linkage assembly includes a linkage member, a first swing arm, and a second swing arm. The actuator's extension and retraction drive the first and second swing arms to rotate relative to each other, thereby displacing the linkage member and driving the side mold element to move relative to the bottom mold. The side mold element can be an opening / closing mold disposed on both sides of the bottom mold for opening or closing, or a moving mold disposed on both sides of the bottom mold with a plurality of protrusions to control the protrusions entering or exiting the forming space. This allows the side mold element to be subjected to uniform force and maintain stability during operation, thereby improving operational accuracy and overall reliability.

Claims

1. A linkage device for a shoe last forming mold, the shoe last forming mold comprising an upper mold and a bottom mold disposed opposite the upper mold; wherein, The bottom mold has a base, a bottom mold element disposed on the base and opposite to the upper mold, and a side mold element disposed opposite to the bottom mold element; characterized in that: the side mold element includes two opening and closing molds disposed on both sides of the bottom mold and movable toward the bottom mold element, and when the two opening and closing molds are close to each other, a forming space is formed between them and the bottom mold; furthermore, a linkage device for driving the actuation is disposed next to each of the opening and closing molds, each linkage device having a frame fixed to the base, at least one linkage assembly disposed on the frame, and an actuator for driving the linkage assembly to move; wherein, the linkage assembly has a component that can be mounted on the frame The linkage for displacement on the frame includes a first swing arm pivotally mounted between the frame and the actuator, and a second swing arm pivotally mounted between the actuator and the linkage. The first swing arm and the frame have a first pivot point, and the second swing arm and the linkage have a second pivot point. The first swing arm, the second swing arm, and the actuator are all pivotally connected to a third pivot point. At the same time, the first swing arm and the second swing arm form an included angle, so that the extension and retraction of the actuator drives the first swing arm and the second swing arm to rotate relative to each other to change their included angle, and at the same time drives the linkage to move, thereby driving the opening and closing mold to move relative to the bottom mold element.

2. The linkage device for the shoe last forming mold according to claim 1, wherein, Each linkage device is provided with two linkage groups, which are respectively positioned at the upper and lower parts of the opening and closing mold, and the actuator is located between the two linkage groups and simultaneously drives the two linkage groups to operate.

3. The linkage device for the shoe last forming mold according to claim 1, wherein, At least one crossbar is provided between the frame of the linkage device and the frame of another linkage device.

4. The linkage device for the shoe last forming mold according to claim 3, wherein, The opening and closing mold slides on the crossbar.

5. The linkage device for the shoe last forming mold according to claim 3, wherein, The linkage slides on the crossbar.

6. A linkage device for a shoe last forming mold, the shoe last forming mold comprising an upper mold and a bottom mold disposed opposite the upper mold; wherein, The bottom mold has a base, a bottom mold element disposed on the base and opposite to the upper mold, and a side mold element disposed opposite to the bottom mold element; characterized in that: a molding space is formed in the center of the bottom mold element, and a plurality of through holes communicating with the molding space are respectively opened on both sides of the bottom mold element; the side mold element has two movable molds disposed on both sides of the bottom mold element and movable towards the bottom mold element, and each movable mold is provided with a plurality of protrusions that can protrude into the through holes and the molding space; furthermore, a linkage device for driving the movable mold is provided next to each movable mold, and each linkage device has a frame fixed to the base, at least one linkage assembly disposed on the frame, and a mechanism for driving the linkage assembly. A moving displacement actuator; wherein the linkage assembly has a linkage member that can move on the frame, a first swing arm pivotally connected between the frame and the actuator, and a second swing arm pivotally connected between the actuator and the linkage member. The first swing arm and the frame have a first pivot point, the second swing arm and the linkage member have a second pivot point, and the first swing arm, the second swing arm and the actuator are pivotally connected to a third pivot point. At the same time, the first swing arm and the second swing arm form an included angle, so that the extension and retraction of the actuator drives the first swing arm and the second swing arm to rotate relative to each other to change their included angle, and at the same time drives the linkage member to move, thereby driving the moving mold to move relative to the bottom mold element, so as to control the protrusion to enter or exit the molding space.

7. The linkage device for the shoe last forming mold according to claim 6, wherein, Each linkage device is provided with two linkage groups, which are respectively arranged at the upper and lower parts of the moving module, and the actuator is arranged between the two linkage groups and simultaneously drives the two linkage groups to operate.

8. The linkage device for the shoe last forming mold according to claim 6, wherein, At least one crossbar is provided between the frame of the linkage device and the frame of another linkage device.

9. The linkage device for the shoe last forming mold according to claim 8, wherein, The moving module slides on the crossbar.

10. The linkage device for the shoe last forming mold according to claim 8, wherein, The linkage slides on the crossbar.

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