Hub Die-Casting Mold with Self-Locking Sleeve
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Solution Overview
Problem
Existing hub die-casting molds require four oil cylinders to exert pressure on arc portions, leading to high energy consumption and increased manufacturing costs.
Innovation Solution
A hub die-casting mold design where two connecting blocks drive two groups of arc portions, utilizing a mold locking sleeve to provide cavity pressure, reducing the need for multiple oil cylinders and simplifying the mold structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If four oil cylinders are used to exert pressure on arc portions, then pressure resistance of cavity is improved, but energy consumption increases and manufacturing costs increase
Solution Approach 1:
The patent removes two oil cylinders from the system, extracting the redundant pressure application mechanism. Instead of using four oil cylinders to press all four arc portions, the design allows two arc portions to be pressed by remaining oil cylinders while the other two arc portions rely on self-locking through the inclined plane mechanism formed by the mold locking sleeve, thereby reducing energy consumption while maintaining cavity pressure resistance.
Solution Approach 2:
The mold locking sleeve with inclined plane structure enables the arc portions to self-lock and maintain pressure without continuous external force. The inclined plane geometry converts the pressing motion into a self-sustaining locking mechanism where the arc portions automatically maintain their position and pressure contribution, eliminating the need for continuous energy input from additional oil cylinders.
2Stress or pressure
If four oil cylinders are used to exert pressure on arc portions, then pressure resistance of cavity is improved, but manufacturing costs increase
Solution Approach 1:
The patent extracts two oil cylinders from the system, directly reducing component count and associated manufacturing costs. The mold locking sleeve structure replaces the function of the removed oil cylinders through its inclined plane self-locking mechanism, achieving cost reduction without sacrificing cavity pressure resistance capability.
3Strength
If upper mold plate connected to vertical columns is disposed, then vertical columns deformation is prevented, but mold structure complexity increases
Solution Approach 1:
The patent removes the upper mold plate connected to vertical columns, simplifying the mold structure. The vertical columns are redesigned to be directly supported by the mold base and connect to the arc portions without the intermediate upper mold plate, eliminating unnecessary components while maintaining structural strength and preventing column deformation through optimized support geometry.
Solution Approach 2:
The mold locking sleeve serves multiple functions: it provides the inclined plane pressing mechanism, acts as a structural support for the arc portions, and contributes to cavity sealing. This multi-functional design replaces the need for separate upper mold plate and vertical column assembly, reducing overall structure complexity while maintaining strength.
Data Source
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Figure 3
AI summary
The present invention discloses a hub die-casting mold, including a lower mold, a side mold, and an upper mold that are combined to form a hub casting cavity, where the lower mold is disposed on a lower mold plate, and the side mold is formed by abutting four sections of arc portions which are slidably connected to the lower mold plate, where the four sections of arc portions are divided into two groups that are respectively located at the left and right sides of the lower mold, and included angles from 3° to 10° are set between sliding tracks of two sections of arc portions in each group and a left-right diameter of the lower mold; and further including two connecting blocks that are respectively disposed on outer sides of the two groups of arc portions, where the connecting blocks are provided with connecting holes, hooks (7) are respectively disposed on exterior walls of the two sections of arc portions in each group, and the hooks are slidably connected to the connecting holes. According to the present invention, two sections of arc portions in one group are separately pulled by using two connecting blocks, and the two connecting blocks need to be driven by only two oil cylinders, thereby halving energy consumption of the oil cylinders in a casting process, and significantly reducing manufacturing costs of a hub. Cavity pressure is provided by using a mold locking sleeve, thereby removing limitations of the specifications of the oil cylinders, and further reducing the manufacturing costs of the hub.