Occluder Closure End Preparation via Two-Stage Pressing
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Solution Overview
Problem
There is a lack of converging and shaping equipment and process methods specifically designed for degradable material strips in the market, which limits the production of high-quality, woven medical equipment products.
Innovation Solution
A method and device for preparing a closure end of an occluder by performing a first pressing and hot-melting on the front end of a degradable material strip, followed by a second pressing with higher pressure to form a stronger closure end, using a device with molds, a fixing member, and heaters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single pressing and hot-melting process is used, then the production process is simple, but the closure end strength is insufficient
Solution Approach 1:
The single pressing process is divided into two distinct pressing stages: first pressing to preform the strip front end, and second pressing to form the final closure end with higher strength. This segmentation allows each stage to optimize for its specific function, resulting in improved closure end strength while maintaining reasonable process complexity
Solution Approach 2:
The first pressing serves as a preliminary action that preforms the strip front end before the final forming operation. This preliminary shaping reduces material irregularities and prepares the material for the second pressing, which then achieves superior strength characteristics in the closure end
2Reliability
If degradable material is used, then the implant is absorbable and biocompatible, but the material requires specialized processing
Solution Approach 1:
The processing parameters (temperature, pressure, time) are specifically optimized for degradable materials. The hot-melting temperature and pressing pressures are controlled to match the thermal and mechanical properties of degradable polymers, enabling reliable processing while maintaining material biocompatibility
Solution Approach 2:
Traditional mechanical joining methods are replaced with thermal processing (hot-melting) to join degradable material strips. This substitution is necessary because degradable materials respond better to thermal processing, and the two-stage pressing with controlled heating provides reliable bonding without compromising material integrity
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 method and device enhance the strength of the closure end by preforming and debubbling the material, resulting in a higher breaking strength and deformation resistance compared to direct hot-pressing methods.
Implementation Method 1
heaters, configured to heat the first mold and the second mold
Implementation Method 2
simultaneously hot-melting the front end of the strip
Implementation Method 3
performing a first pressing on a front end of a strip, and simultaneously hot-melting the front end of the strip
Data Source
AI summary
Disclosed are a method for preparing a closure end of an occluder, and a device for preparing a closure end of an occluder. The method includes: step 100, performing a first pressing on a front end of a strip, and simultaneously hot-melting the front end of the strip to preform the front end of the strip; step 200, performing a second pressing on the preformed front end of the strip, and simultaneously hot-melting the preformed front end of the strip, so as to form the preformed front end of the strip; and step 300, cooling the formed front end of the strip to obtain the closure end. Through first pressing and hot-melting, a strip sets and is formed into a preset shape; and then, through second pressing, the strip is better fitted to a mold and debubbled, so that a formed closure end has a higher strength.