Perforating Heat-Fusible Material with Ultrasonic Heating and Absorbent Layer
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Solution Overview
Problem
Existing methods for creating patterns of holes in heat-fusible materials, such as those used in wound dressings, face challenges in managing waste and maintaining processing speed, as the punched-out material can contaminate the finished product.
Innovation Solution
A method involving the use of an ultrasonic device to locally heat a layer of heat-fusible material in contact with an absorbent layer, causing the molten material to be absorbed, thus eliminating waste and allowing for simultaneous hole formation and lamination with additional layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If punching method is used to create holes in heat-fusible material, then hole formation speed is high, but waste material contaminates the finished product
Solution Approach 1:
The patent applies an absorbent layer that captures and retains the punched-out waste material, converting the harmful contamination into a contained and managed byproduct. The absorbent layer is specifically designed to interact with and hold the ejected material, preventing it from contaminating the finished product while maintaining high-speed punching operation.
Solution Approach 2:
The absorbent layer serves as an intermediary between the punching tool and the heat-fusible material. It intercepts the waste material as it is ejected from the punching process, acting as a mediator that prevents direct contact between the waste and the finished product, thereby solving the contamination problem without reducing punching speed.
2Productivity
If punching speed is increased to match processing line speed, then productivity improves, but waste management becomes more difficult
Solution Approach 1:
By introducing the absorbent layer, the patent converts the waste management problem into a solved issue. The absorbent layer is designed to capture and retain waste material at high speeds, transforming the previously problematic waste ejection into a controlled process where waste is automatically contained and managed as part of the production flow.
3Object-generated harmful factors
If local heating is used to form holes, then waste contamination is eliminated, but processing speed may be reduced
Solution Approach 1:
The patent utilizes phase transition (melting) of the heat-fusible material through localized heating. The material transitions from solid to liquid state at the heated points, forming holes without mechanical punching. This eliminates waste ejection while the controlled nature of the heating process allows for efficient production.
Solution Approach 2:
The patent changes the physical parameters of the material locally through heating, causing controlled melting and hole formation. By adjusting heating parameters such as temperature, duration, and spatial distribution, the process achieves both clean hole formation and maintained productivity, eliminating the trade-off between cleanliness and speed.
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 method ensures that all waste from the perforation process is contained within the absorbent material, preventing contamination and enabling rapid, efficient production of perforated layers with integrated absorbent and sealing layers, while allowing for control over heating and hole shape.
Implementation Method 1
the heating is done by means of an ultrasonic device
Implementation Method 2
the layer of heat-fusible material is heated locally so that holes are formed in the material
Implementation Method 3
The layer of absorbent material is removed from the layer of heat-fusible material after having absorbed the molten material from the holes made in the layer of heat-fusible material
Data Source
Figure 1~2
AI summary
The present invention relates to a method for making holes in a layer (1) of heat-fusible material. According to the invention a layer of absorbent material (2) is placed in contact with a layer (1) of heat- fusible material, following which the layer of heat-fusible material is heated locally so that holes are formed in the material.