Compression Molding With Toggle Link and Hydraulic Closing Force
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Solution Overview
Problem
Existing compression molding devices face challenges in achieving high compression molding forces without compromising efficiency or shortening the service life of moving mechanisms due to the use of cam and hydraulic cylinder mechanisms, which either wear out quickly or operate inefficiently.
Innovation Solution
A compression molding device incorporating a toggle link mechanism for the one-side mold assembly and a hydraulic cylinder mechanism for the opposite-side mold assembly, allowing for a nearly closed state followed by a closed state to generate strong compression forces without transmitting load to the toggle link mechanism, thus extending its service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cam mechanism is used for mold assembly moving means, then the structure is simple and easy to manufacture, but the compression molding force is insufficient and the service life is short due to wear and damage
Solution Approach 1:
The patent replaces the cam mechanism with a hydraulic cylinder mechanism to generate sufficient compression molding force. The hydraulic system provides the necessary force while the cam mechanism is retained only for positioning purposes, resolving the contradiction between ease of manufacture and sufficient force generation.
Solution Approach 2:
The patent introduces a hydraulic fluid as an intermediary medium to transmit force from the hydraulic cylinder to the mold assembly. This intermediary allows the system to achieve high compression molding force while keeping the mechanical structure relatively simple.
2Force
If a hydraulic cylinder mechanism is used for mold assembly moving means, then the compression molding force is sufficient, but the motion speed is slow and production efficiency is reduced
Solution Approach 1:
The patent segments the mold assembly moving process into two distinct phases: a rapid positioning phase using the cam mechanism and a force application phase using the hydraulic cylinder. This segmentation allows the system to achieve both high speed during positioning and sufficient force during molding, thereby maintaining production efficiency.
Solution Approach 2:
The patent employs periodic action by alternating between the cam mechanism-driven rapid motion and the hydraulic cylinder-driven force application. This periodic switching between different actuation methods optimizes both speed and force delivery, resolving the contradiction between compression molding force and production efficiency.
3Force
If both cam mechanism and hydraulic cylinder mechanism are used for mold assembly moving means, then the compression molding force is sufficient, but the load on the cam mechanism is heavy and service life is shortened
Solution Approach 1:
The patent extracts the force generation function from the cam mechanism and assigns it to the hydraulic cylinder. The cam mechanism is retained only for positioning functions, thereby removing the heavy load from the cam mechanism components and extending their service life while maintaining sufficient compression molding force.
Solution Approach 2:
The patent segments the functional responsibilities: the cam mechanism handles positioning and the hydraulic cylinder handles force generation. This functional segmentation protects the cam mechanism from heavy loads during force application, thereby extending its service life while maintaining system effectiveness.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves high compression molding forces efficiently while maintaining production efficiency and prolonging the service life of the moving mechanisms by isolating the toggle link mechanism from direct load transmission.
Implementation Method 1
an opposite-side mold assembly moving means including a hydraulic cylinder mechanism
Implementation Method 2
a one-side mold assembly moving means including a toggle link mechanism including two links
Data Source
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AI summary
A compression molding device, which can obtain a high compression molding force without lowering the efficiency of article production, and whose molding means has a long service life, is provided. In the compression molding device, a one-side mold assembly moving means (58) includes a toggle link mechanism including two links (62) and (64), and a toggle link mechanism operating means (60), while an opposite-side mold assembly moving means (108) includes a hydraulic cylinder mechanism. When a one-side mold assembly (16) and an opposite-side mold assembly (18) are to be brought from an open state into a closed state, the one-side mold assembly (16) is first moved to a nearly closed state by the one-side mold assembly moving means (58), and then the opposite-side mold assembly (18) is moved from the nearly closed state to the closed state by the opposite-side mold assembly moving means (108).