Technological feasibility and economic benefits limit the degree of which companies are willing to reuse defective products and scrap materials. In this project, working with Transway inc, REnato lab aim to provide our client a solution grounded by principles of circular design. By utilizing the color coding of polyamide (PA) and thermoplastic polyurethane (TPU) components of our client’s product, we aim to maximize the purity of material recovery, allowing easy reintegration into the supply chain and reducing overheads.
Maximize efficiency parameters for crushing and sorting of two-color injection molding products
Assess the suitability of PA properties as a reused material
Evaluate the benefits of developing a two-color injection molding product recycling chain
Current state of product:
This type of product uses black PA and colored TPU for injection molding. The resulting composite material waste accounts for the largest proportion in mass, but its lower price point underlies its need for interventions.
PA reuse modeL:
By adjusting the proportion of PA regrind for injection molding, we hope to find the perfect material ratio that maximizes recovery efficiency from color sorting while maintaining product qualities and reducing the cost of raw materials.
Develop plan of action, experimental design and gauging technical feasibility. Prepare workflow by connecting plastic grinding, color sorting, and granulation test contractors
Composite material waste is crushed into different particle sizes
Sorting waste chips by color to optimize particle size, sorting rate, and plastic purity
Create test samples
Conduct quality assessments to ensure that the solution satisfies objectives
Establishment of optimization parameters for crushing and sorting
Test sample mechanical properties suitability
Overall reuse chain assessment
Experimental design, organization of collaborators
Waste grinding treatment, particle size screening
Particle sorting, parameter optimization
Granulation proofing, property testing
Adjust accordingly based on initial test results, Overall assessment