Considerations about Hollow Polypropylene Balls Manufacturing by Ultrasonic Welding

Dan Florin Teușdea; Nicuşor Alin Sîrbu; Mircea Vodă; Adrian Roșu; Răzvan Ionuţ Iacobici

doi:10.4028/www.scientific.net/AMR.1164.35

Paper Titles

Experimental Researches on Using Resistance Spot Welding for Built-Up Cold-Formed Beams Made of Corrugated Galvanized Steel Sheets
p.3

Preliminary Research for Development of MW-TIG Hybrid Welding System
p.9

Eutectic Microbonding of Composite Materials Using Microwave Technology
p.17

Influence Analysis of the Controllable Factors on the Objective Functions for Optimizing the Welding of PE 100 Pipelines for Natural Gas Distribution
p.25

Considerations about Hollow Polypropylene Balls Manufacturing by Ultrasonic Welding
p.35

Experimental Investigations on Capabilities of Resistance Spot Welding and MIG Brazing for Producing Corrugated Beams Using Galvanized Steel Sheets
p.47

Control of the Properties of Welded Joints in Wet Underwater Welding
p.55

Comparative Study on Remaining Life Assessment of a Pressure Vessel, Working in Severe Conditions, Based on Results of Metallographic Replicas and Creep Tests
p.67

Estimating the Concrete Compressive Strength by Using the Concrete Ultrasonic Pulse Velocity and Moduli of Elasticity
p.77

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1164Considerations about Hollow Polypropylene Balls...

Considerations about Hollow Polypropylene Balls Manufacturing by Ultrasonic Welding

Abstract:

Fast development of Sustainability and Circular Economy concepts has been materialized in European Parliament Directive no 2019/904. This Directive requires to reduce the consumption of plastic material for the manufacture of disposable packaging. In spite of the aggressive campaign against plastic materials usage, there are huge advantages which must be considered before replacing them by other alternative materials. Downsizing, Lightweighting and Downgauging technics are employed from early stage in designing new products made by plastic materials. Product recyclability features and recycled materials usage for products manufacturing need also to be assessed during the design and testing phase. This article proposes ultrasonic welding as an alternative technology for manufacturing the hollow polypropylene balls. With the traditional technology, the manufacturing of these balls results in an uneven wall thicknesses and a large technological runner of material that needs to be grinded and reintroduced into the injection equipment and this involves high consumption of raw material and energy. The proposed method of manufacturing these hollow balls consists in forming the ball from two ball halves joined together by ultrasonic welding. This process will result in significant savings in raw material and energy. As a case study, the manufacturing of deo roll balls have been considered. Several experimental researches have been made using ultrasonic welding at frequencies of 20 kHz and 35 kHz. Significant improvements on the capabilities of the ball external diameters have been recorded by ultrasonic welding using the frequency of 35 kHz. Further testing and comparative study of mechanical properties must be considered in order to define the best process parameters for hollow plastic balls manufacturing by Ultrasonic Welding.