scholarly journals Injection Molding Technology

2022 ◽  
Author(s):  
D.A. Kurasov
Keyword(s):  
Injection Molding ◽  
Mass Production ◽  
Large Scale ◽  
Injection Molding Process ◽  
Molding Process ◽  
High Quality

Abstract. The injection molding process is one of the most efficient and economical casting processes. The process is becoming increasingly common in various industries in large-scale and mass production of castings. It should be noted that by having great advantages over other methods of obtaining high-quality castings of higher accuracy, injection molding makes it possible to bring the dimensions of the castings as close as possible to the dimensions of the finished parts.

scholarly journals Mass-production and Distribution of Medical Face Shields Using Additive Manufacturing and Injection Molding Process for Healthcare System Support During COVID-19 Pandemic in Brazil

2020 ◽  
Author(s):  
Maria Elizete Kunkel ◽  
Mayra Torres Vasques ◽  
João Aléssio Juliano Perfeito ◽  
Nataly Rabelo Mina Zambrana ◽  
Tainara dos Santos Bina ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Injection Molding ◽  
Mass Production ◽  
Large Scale ◽  
Fused Deposition Modeling ◽  
Public Hospitals ◽  
Injection Molding Process ◽  
Scale Production ◽  
Molding Process ◽  
Fused Deposition

Abstract Face shields have been adopted worldwide as personal protective equipment for healthcare professionals during the COVID-19 pandemic. This device provides a transparent facial physical barrier reducing the exposure to aerosol particles. The fused deposition modeling (FDM) is the most applied process of additive manufacturing due to its usability and low-cost. The injection molding (IM) is the fastest process for mass production. This study is the first to perform a qualitative comparison between the use of FDM and IM processes for mass production and rapid distribution of face shields in a pandemic. The design of the face shield and tests were conducted in prototyping cycles based on requirements of medical, Brazilian standards, manufacturing, and production. The FDM face shields manufacturing was carried out by a volunteer network, and the IM manufacturing was carried out by companies. The volunteers produced 35,000 medical face shields through the FDM process with daily delivery to several hospitals. A total of 80,000 face shields was produced by the IM process and delivered to remote Brazilian regions. The mass production of 115,000 face shields protected health professionals from public hospitals in all states of Brazil. In a pandemic, both FDM and IM processes are suitable for mass production of face shields. Once a committed network of volunteers is formed in strategic regions, the FDM process promotes a fast daily production. The IM process is the best option for large scale production of face shields and delivery to remote areas where access to 3D printing is reduced.

Ultrasonic measurement of clamping force for injection molding machine

2019 ◽  
Vol 39 (4) ◽  
pp. 388-396 ◽  
Author(s):  
Peng Zhao ◽  
Yao Zhao ◽  
Jianfeng Zhang ◽  
Junye Huang ◽  
Neng Xia ◽  
...  
Keyword(s):  
Injection Molding ◽  
Measurement Method ◽  
Large Scale ◽  
Force Measurement ◽  
Low Cost ◽  
Ultrasonic Method ◽  
Injection Molding Process ◽  
Propagation Time ◽  
Clamping Force ◽  
Molding Process

AbstractAn online and feasible clamping force measurement method is important in the injection molding process and equipment. Based on the sono-elasticity theory, anin situclamping force measurement method using ultrasonic technology is proposed in this paper. A mathematical model is established to describe the relationship between the ultrasonic propagation time, mold thickness, and clamping force. A series of experiments are performed to verify the proposed method. Experimental findings show that the measurement results of the proposed method agree well with those of the magnetic enclosed-type clamping force tester method, with difference squares less than 2 (MPa)2and errors bars less than 0.7 MPa. The ultrasonic method can be applied in molds of different thickness, injection molding machines of different clamping scales, and large-scale injection cycles. The proposed method offers advantages of being highly accurate, highly stable, simple, feasible, non-destructive, and low-cost, providing significant application prospects in the injection molding industry.

Advantages and Limitations of Using Nano Sized Powders for Powder Injection Molding Process: A Review

2012 ◽  
Vol 59 (2) ◽  
Author(s):  
Javad Rajabi ◽  
Norhamidi Muhamad ◽  
Abu Bakar Sulong ◽  
Abdolali Fayyaz ◽  
Azizah Wahi
Keyword(s):  
Injection Molding ◽  
Large Scale ◽  
Sintering Temperature ◽  
High Surface ◽  
Volume Ratio ◽  
Powder Injection Molding ◽  
Nano Particles ◽  
Powder Injection ◽  
Injection Molding Process ◽  
Molding Process

Powder injection molding (PIM) is among the most known forming techniques that use material powders. This technique has been widely evaluated for the production of large scale and small components using metal and ceramic powders. Nano particles have larger surface-to-volume ratio compared with large-sized particles, thus they display high surface area. Some merits in the application of nano-sized particles in the PIM process includes increasing its comparative density at a low sintering temperature, decreasing sintering temperature, decreasing grain size of sintered bodies, increasing hardness value, and improving surface properties. However, it also has several disadvantages, which include increasing the viscosity behaviour of feedstock, oxidation, and agglomeration. This article reviews current studies on the effects of nano-sized particles on the PIM process and finding solutions to address its disadvantages.

scholarly journals Optimization for Reducing Warpage in Injection Moulding

2018 ◽  
Vol 2 (5) ◽  
pp. 25-31
Author(s):  
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Large Scale ◽  
Simulation Software ◽  
Optimum Process ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Product Cycles ◽  
Filling Time

Injection molding is a standout technique utilized for the fabrication of thermoplastic parts in industry due to short product cycles, high part quality, good mechanical properties and low cost for large scale manufacturing. In molded case circuit breaker (MCCB), Trip-bar is one of the most critical components as safety is concerned which is manufactured by injection molding process. To get it manufactured within the specified warpage and deformities free, number of mold flow simulations is carried out using Creo-MoldFlow. The outcomes of the simulation are used to design the mold tool and the process parameters for injection molding are optimized. For process parameter optimization Taguchi based experimental design and ANOVA analysis is done. The objective of this work is to optimize the injection molding process parameters such as filling time, melt temperature and mold temperature to minimize the warpage. CAE flow simulation software is used to simulate the process and Grey Relational Analysis (GRA) is used to find out optimum process parameters.

scholarly journals Additive manufacturing and injection molding process for mass-production of face shields during COVID-19 pandemic: A comparative study 

2020 ◽  
Author(s):  
Maria Elizete Kunkel ◽  
Mayra Torres Vasques ◽  
João Aléssio Juliano Perfeito ◽  
Nataly Rabelo Mina Zambrana ◽  
Tainara dos Santos Bina ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Injection Molding ◽  
Mass Production ◽  
Large Scale ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Injection Molding Process ◽  
Scale Production ◽  
Fused Deposition ◽  
Quality Costs

Abstract Face shield is a personal protective equipment required for healthcare professionals to decrease the risk of contamination during the COVID-19. Fused deposition modeling (FDM) is the most applied process of additive manufacturing due to its usability and low-cost. The injection molding (IM) is the fastest process for mass industrial production. The comparison between the FDM and IM process to produce plastic parts is well known, but this study is the first to perform a qualitative comparison of these processes for mass-production and distribution of face shields in a pandemic. The design of the face shield was developed in three prototyping cycles based on requirements of medical, Brazilian regulatory standards, manufacturing, and production. The FDM manufacturing of 35,000 face shields was carried out by a volunteer network using low-cost 3D printer and the IM manufacturing of 80,000 was carried out by partner companies. With the production of face shields through the FDM process, it was possible to make daily deliveries of small batches to local hospitals. A total of 80,000 face shields was produced in larger batches by the IM process and delivered to remote regions in Brazil. Considering the manufacturing resilience of the processes (quality, costs, and production time), in a situation such as the current COVID-19 pandemic with disturbances and uncertainties, both FDM and IM processes are suitable for mass production of face shields. The FDM process promotes a fast-daily production once a committed network of volunteers is formed in strategic regions. The IM process was the best option for large scale production of face shields and delivery to remote regions without the availability of 3D printers.

scholarly journals Producing Hollow Polymer Microneedles Using Laser Ablated Molds in an Injection Molding Process

2021 ◽  
Author(s):  
Tim Evens ◽  
Lorenz Van Hileghem ◽  
Francesco Dal Dosso ◽  
Jeroen Lammertyn ◽  
Olivier Malek ◽  
...  
Keyword(s):  
Injection Molding ◽  
Large Scale ◽  
Low Cost ◽  
Mold Insert ◽  
High Volume ◽  
Mold Temperature ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Hollow Microneedles

Abstract Microneedle arrays contain needle-like microscopic structures which facilitate drug or vaccine delivery in a minimally invasive way. However, producing hollow microneedles is currently limited by expensive, time consuming and complex microfabrication techniques. In this paper, a novel method to produce hollow polymer microneedles is presented. This method utilizes a femtosecond laser to create hollow microneedle cavities in a mold insert. This mold insert is used in an injection molding process, to replicate polymethyl methacrylate microneedles. The combined effect of the mold temperature, volumetric injection rate and melt temperature on the replication fidelity was evaluated. It was found that the combination of high injection molding parameters facilitated the replication. Furthermore, the functionality of the manufactured hollow microneedles was successfully tested by injecting a controlled flow of colored water into an agarose matrix. The developed methodology enables the production of low-cost, high-volume microneedle devices, which could be a key asset for large scale vaccination campaigns.

Analysis and Optimization of the Rubik's Cube Center Shaft Injection Based on Moldflow Software

2013 ◽  
Vol 457-458 ◽  
pp. 1566-1570
Author(s):  
Hui Li ◽  
Yan Chen
Keyword(s):  
Injection Molding ◽  
Large Scale ◽  
Structural Characteristics ◽  
Low Cost ◽  
Injection Molding Process ◽  
Molding Process ◽  
High Efficient ◽  
Rubik's Cube ◽  
Rubik’S Cube ◽  
Great Progress

Fortunately recent years the developments of CAD/CAE technique in the mold industry have been obtained great progress and large-scale application due to its low-cost, high-efficient, all-position and all-procedure parameters designing and simulation function. According to the structural characteristics of the Rubik's cube center shaft, using Moldflow software to analyze and simulate the injection molding process, including gate location, filling, cooling and warping. Through comparison analysis under different conditions of injection molding process, the optimum technological parameter is determined. Finally, UG software is used to build up the model of injection mold.

Filling Behavior of Polymer Material into Sub-^|^mu;m Structure in Injection Molding Process

2013 ◽  
Vol 133 (4) ◽  
pp. 105-111
Author(s):  
Chisato Yoshimura ◽  
Hiroyuki Hosokawa ◽  
Koji Shimojima ◽  
Fumihiro Itoigawa
Keyword(s):  
Injection Molding ◽  
Polymer Material ◽  
Injection Molding Process ◽  
Molding Process
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