Die Lip Driving System Axial Force Conversion
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Solution Overview
Problem
Existing die lip driving structures using lever mechanisms are inefficient in applying driving force due to misalignment between the direction of force exerted on the flexible lip and the rotational force of the lever, limiting the effective control of the gap between the lips in T-die systems.
Innovation Solution
A die lip driving structure that converts rotational force of the lever into a force in the axial direction of the operating rod, allowing direct application of pressing or tensile loads to the flexible lip portion, thereby maximizing the efficiency of driving force transmission and gap adjustment between the lips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a lever mechanism is installed on the side surface of the die body to adjust the flexible lip portion, then the gap between lips can be controlled, but the driving force cannot be applied efficiently due to misalignment between force direction and rotational force direction
Solution Approach 1:
An operating rod is introduced as an intermediary component between the lever and the flexible lip portion. The lever rotates about an axis, and its tip applies force to the operating rod, which then transmits this force in the axial direction to the flexible lip portion. This intermediary mechanism resolves the directional misalignment by converting rotational motion into linear axial force, maximizing the utilization of the lever's rotational force.
Solution Approach 2:
The system changes the direction parameter of force transmission. Instead of directly applying lateral force from the lever to the flexible lip, the operating rod converts the rotational displacement into axial displacement, changing the force application parameter from lateral to axial direction, thereby achieving efficient force transmission.
2Device complexity
If the lever directly pushes the flexible T-die lip, then the structure is simple, but there is room for improvement in driving force efficiency
Solution Approach 1:
The operating rod serves as a mediator that adds minimal structural complexity while dramatically improving driving force efficiency. The rod connects the lever's rotational motion to the flexible lip's axial displacement, enabling efficient force transmission with only one additional simple component.
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
This configuration enables more efficient application of driving force for adjusting the gap between the lips, enhancing the control over resin film thickness and reducing air gaps, which improves resin film yield and minimizes shrinkage phenomena.
Implementation Method 1
A rotational force of the lever is converted into a force in the axial direction of the operating rod, and the force in the axial direction becomes a pressing load or a tensile load exerted on the flexible lip portion
Implementation Method 2
The flexible lip portion is elastically deformed by driving an actuator such that the gap therebetween is adjusted
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a die lip driving structure according to an embodiment, a rotational force of a lever (34) is converted into a force in an axial direction of an operating rod, and the force in the axial direction becomes a pressing load or a tensile load exerted on a flexible lip portion (22). The lever (34) directly applies a force to the operating rod (36) at a point of action P of the lever (34).