Thermoplastic Composite Molding for Clear 3D Cloth Patterns
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Solution Overview
Problem
Conventional methods for forming thermoplastic composites fail to produce clear three-dimensional patterns in products like shoes, purses, and hats, as they do not effectively combine cloth material and thermoplastic film to achieve desired shapes.
Innovation Solution
A method involving cutting a thermoplastic film with a higher melting surface layer and adhesive layer, placing it on a molding machine platform with channels and pores, and using heat and vacuum to melt the adhesive layer, allowing it to penetrate into the cloth material while conforming to concave and convex patterns, thereby forming tighter composites with varying shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rolling method with two rollers is used to form thermoplastic composites, then the process is simple, but the three-dimensional patterns are not obvious
Solution Approach 1:
The platform incorporates multiple pores that communicate with channels, allowing vacuum to draw the thermoplastic film and cloth material downward into the concave patterns. This porous structure enables deep penetration and formation of obvious three-dimensional patterns, resolving the issue of pattern clarity while maintaining processability
Solution Approach 2:
The invention uses a vacuum unit connected to channels in the platform to create negative pressure, drawing the heated thermoplastic film and cloth material into the concave patterns. This pneumatic mechanism enables deep three-dimensional pattern formation without complex mechanical pressing systems
2Manufacturing precision
If hot pressing method with upper and lower molds is used to form thermoplastic composites, then the bonding strength is improved, but the concave and convex patterns are not three-dimensional obviously
Solution Approach 1:
The invention transitions from conventional two-dimensional hot pressing to three-dimensional pattern formation by incorporating pores and channels that extend vertically into the platform. This allows the material to be drawn downward into deep concave patterns, creating obvious three-dimensional effects while maintaining bonding strength through vacuum adhesion and adhesive penetration
3Strength
If the adhesive layer is heated to melt and penetrate into cloth material, then the bonding between film and cloth is improved, but the surface layer may deform if its melting point is not sufficiently higher than adhesive layer
Solution Approach 1:
The thermoplastic film is designed with differentiated melting points: the adhesive layer has a lower melting point for easy penetration and bonding, while the surface layer has a higher melting point to maintain structural integrity. This local quality differentiation allows the adhesive to bond to the cloth material without deforming the visible surface patterns
Solution Approach 2:
The invention controls the melting temperature parameter by selecting materials with specific melting point differences. The adhesive layer melts at a lower temperature to penetrate and bond with the cloth material, while the surface layer remains solid at these temperatures to maintain pattern definition, only softening slightly to conform to the mold
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 enables the formation of thermoplastic composites with obvious three-dimensional patterns, allowing for the production of complex shapes in items such as shoes, purses, and hats by ensuring the adhesive layer adheres to the cloth material and conforms to patterned surfaces.
Implementation Method 1
heating the thermoplastic film by using a heating unit to melt the adhesive layer and to soften the surface layer
Implementation Method 2
heating the thermoplastic film by using a heating unit
Implementation Method 3
air in the plurality of channels drawn by a vacuum unit, with the plural pores drawing the thermoplastic film and the cloth material downwardly
Implementation Method 4
with the pressing member pressing the cloth material
Implementation Method 5
such that the adhesive layer of the thermoplastic film penetrates into the cloth material, such that the adhesive layer adheres with the cloth material
Data Source
AI summary
A method for forming thermoplastic composites comprising: (a). cutting a thermoplastic film and a cloth material, wherein the thermoplastic film is comprised of a surface layer and an adhesive layer, and a melting point of the surface layer is higher than the adhesive layer; (b). placing the thermoplastic film on a platform of a molding machine, facing the adhesive layer upwardly, and covering the cloth material on the thermoplastic film, wherein the platform includes a plurality of channels defined therein, a plurality of concave and convex patterns arranged on a top surface thereof, and plural pores evenly formed on the top surface thereof and communicating with the plurality of channels; (c). heating the thermoplastic film by using a heating unit so as to melt the adhesive layer and to soften the surface layer.