scholarly journals Thermal specification of 3D printed injection moulds made from PA12GB

2021 ◽  
Vol 1199 (1) ◽  
pp. 012009
Author(s):  
K Raz ◽  
Z Chval ◽  
M Habrman ◽  
A Milsimerova
Keyword(s):  
Cost Reduction ◽  
Plastic Material ◽  
Moulding Process ◽  
Cycle Times ◽  
Thermal Distribution ◽  
Injection Process ◽  
Automotive Technology ◽  
Plastic Specimen ◽  
3D Printed ◽  
Plastic Mould

Abstract This paper deals with the usage of the injection mould made from the plastic material. This technology is rapidly decreasing the time, necessary to the production of the prototype. This attribute takes nowadays a key role in the industry, especially in the automotive. Technology of using injection moulds from the plastic material (produced by additive technologies) has advantages in the decreasing of the time demands and cost reduction during the production of the prototype part. Unfortunately, plastic moulds have worse surface quality, lower lifetime of the mould (measured in number of produced parts) and more difficulties of moulding process regulation with respect to the metal moulds. This paper is focused on the injection process and it is describing the thermal distribution and specification of the comparable plastic specimen during injection into the metal and plastic mould. The results are the temperature and cycle-times comparisons. The effectivity of cooling is also compared in this work. It is obvious, that the plastic mould has worse results compared to the metal mould. However, this is clearly balanced by the speed of production and price of plastic mould. The prototype of the plastic mould was made from the material PA12GB with usage of 3D printer HP MJF4200

scholarly journals Analysing Powder Injection Moulding of a Helix Geometry Using Soft Tooling

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4183
Author(s):  
Alberto Basso ◽  
Yang Zhang ◽  
Jacob Kjeldahl Pløger ◽  
Jon Spangenberg ◽  
Hans Nørgaard Hansen
Keyword(s):  
Injection Moulding ◽  
Steel Powder ◽  
Powder Injection ◽  
Moulding Process ◽  
Injection Process ◽  
Geometrical Complexity ◽  
Powder Injection Moulding ◽  
Injection Moulding Process ◽  
3D Printed ◽  
Powder Suspension

Freeform injection moulding is a novel technology for powder injection moulding where a sacrificial 3D printed mould (i.e., a soft tooling) is used as an insert in the injection process. The use of 3D printed moulds enable a higher geometrical design flexibility as compared to the conventional injection moulding process. However, there is still very limited knowledge on how the sacrificial soft tooling material and powder suspension handles the increased geometrical complexity during the process. In this study, a stainless steel powder suspension is injected into a geometrically challenging sacrificial mould (viz. a helix structure) that is produced by vat photopolymerization additive manufacturing. Computed tomography is used to quantify the geometrical precision of the mould both before and after injection. In addition, a new numerical model that considers the suspension feedstock is developed to investigate the powder injection moulding process. The numerical results are found to be in qualitative good agreement with the experimental findings in terms of pinpointing critical areas of the structure, thereby highlighting a new pathway for evaluating sacrificial inserts for powder injection moulding with a high geometrical complexity.

scholarly journals STUDY OF DEFECT ON 180 ML HDPE BOTTLES YOGURT PRODUCTS WITH SMC B11 EXTRUSION BLOW MACHINE AT PT X

KREATOR ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Tommy Prasetya Kana ◽  
Handika Dany Rahmayanti ◽  
HM Didik
Keyword(s):  
High Density Polyethylene ◽  
Plastic Material ◽  
Production Cycle ◽  
Molding Process ◽  
Plastic Packaging ◽  
Cycle Times ◽  
Blow Molding ◽  
Plastic Bottle ◽  
Extrusion Blow Molding ◽  
Stretch Blow Molding

The type of plastic packaging that is popular in the community is bottle packaging. The plastic material that is generally used to make plastic bottles is High Density Polyethylene (HDPE). The plastic bottle industry in Indonesia usually uses a blow molding process in its production process, where the blow molding process consists of injection blow molding, extrusion blow molding and stretch blow molding. The SMC B11 machine is one of the extrusion blow molding machines used to produce plastic bottle packaging. In producing workpieces, this machine still produces several products that are not in accordance with company standards, including in terms of production cycle times and product defects. Defects or defects that are often encountered include the appearance of spots, bent parison which causes the bottle to bend (the bottle body is thin one side) and blow pin which causes the thread to not fit.Keywords— Bottle, Plastic, Defect, Extrussion Blow Molding

CFD Analysis and Evaluation of Heat Transfer Enhancement of Internal Flow in Tubes With 3D-Printed Complex Fins

2019 ◽  
Author(s):  
Chao Wei ◽  
Gabriel Alexander Vasquez Diaz ◽  
Kun Wang ◽  
Peiwen Li
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Plastic Material ◽  
Control Volume ◽  
Internal Flow ◽  
Entropy Generation Rate ◽  
Transfer Enhancement ◽  
Transfer Tube ◽  
3D Printed ◽  
Internal Fins

Abstract Additive manufacturing (AM), also known as 3D printing technology, is applied to fabricate complex fin structures for heat transfer enhancement at inner surface of tubes, which conventional manufacturing technology cannot make. This work considered rectangular fins, scale fins, and delta fins with staggered alignment at the inner wall of heat transfer tubes for heat transfer enhancement of internal flows. Designed fin structures are trial-printed using plastic material to exam the printability. Laminar flow convective heat transfer has been numerically studied, and heat transfer performance of the tubes with 3D-printed interrupted fins has been compared to that with conventional straight continued fins. The benefit from heat transfer enhancement and the loss due to increased pumping pressure is evaluated using the total entropy generation rate in the control volume of heat transfer tube. As the conclusion of the study, better heat transfer tubes with 3D-printed internal fins are recommended.

SU-C-213-05: Evaluation of a Composite Copper-Plastic Material for a 3D Printed Radiation Therapy Bolus

2015 ◽  
Vol 42 (6Part2) ◽  
pp. 3189-3189 ◽  
Author(s):  
L Vitzthum ◽  
E Ehler ◽  
D Sterling ◽  
T Reynolds ◽  
P Higgins ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Plastic Material ◽  
3D Printed

On-Line Thermal Control for Injection Moulding Process

2013 ◽  
Author(s):  
Jaho Seo ◽  
Amir Khajepour ◽  
Jan P. Huissoon ◽  
Young-Jun Park
Keyword(s):  
Injection Moulding ◽  
Thermal Control ◽  
Production Quality ◽  
Modeling And Control ◽  
Moulding Process ◽  
Cycle Times ◽  
Plastic Injection Moulding ◽  
Injection Moulding Process ◽  
On Line ◽  
And Control

Thermal control is a key issue for injection moulding process due to its effects on production quality and rate. In this study, an on-line thermal control strategy is provided for effective thermal management in plastic injection moulding process. The strategy covers for methods in determining sensor locations as a prerequisite step for modeling and control, identifying a thermal dynamic model of a mould with uncertainties and designing a cavity wall temperature controller. A verification of the designed controller’s performance is carried out from the viewpoints of accuracy in on-line temperature tacking and response time under different injection moulding process with various cycle-times.

Rotational Moulding of Liquid Polymers

1996 ◽  
Vol 210 (5) ◽  
pp. 437-447 ◽  
Author(s):  
E Harkin-Jones ◽  
R J Crawford
Keyword(s):  
Ring Opening ◽  
Material Handling ◽  
Bubble Formation ◽  
Rotational Moulding ◽  
Polymer Systems ◽  
Moulding Process ◽  
Cycle Times ◽  
Liquid Polymer ◽  
Liquid Polymers ◽  
Rotationally Moulded

The vast majority of rotationally moulded articles are produced from powdered polymers. However, the moulding process developed originally from the use of liquid polymers and nowadays there is a renewed interest in such systems because of some unique advantages that they offer. This paper compares the behaviour of three different liquid polymer systems—nylon 6 by ring-opening caprolactam, polyvinyl chloride plastisol and polyurethane. The flow behaviour of each material is examined with particular reference to wall thickness distributions and bubble formation in the product. On the basis of this, criteria for the production of fault-free mouldings have been established. The interrelationships between mould shape and resin viscosity are also examined and an ideal viscosity—time—temperature profile is proposed for liquid polymer systems. Finally, a general comparison of the materials is made with regard to material handling, safety, cycle times, etc.

The effect of pressure and temperature on microthermoforming thermoplastic films integrated in the injection moulding process

2016 ◽  
Vol 36 (6) ◽  
pp. 597-605 ◽  
Author(s):  
Ariane Jungmeier
Keyword(s):  
Injection Moulding ◽  
Large Scale ◽  
Three Dimensional ◽  
Scale Production ◽  
Moulding Process ◽  
Cycle Times ◽  
Large Scale Production ◽  
Flow Length ◽  
Injection Moulding Process ◽  
Fitting In

Abstract Injection moulding is a widespread large-scale production technology for the manufacturing of thermoplastic parts, with small wall thicknesses limiting the feasible flow length. Introducing microthermoforming into the injection moulding process with dynamic mould temperature control enables the production of film-based, plane microstructured parts with further three-dimensional functional structures (e.g. for handling or for fitting in devices/assembly groups). Investigations show that considerable forming is possible with pressures up to 140 bar and forming temperatures far below the glass transition temperature of 50-μm-thick polycarbonate films in cycle times of <3 min. Generally speaking, the novel technology is expected to allow for multifunctional, thin-walled microstructured parts at large scales with short cycle times.

scholarly journals 3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

2021 ◽  
Vol 3 ◽  
Author(s):  
Shreenath Krishnamurthy ◽  
Richard Blom ◽  
Kari Anne Andreassen ◽  
Vesna Middelkoop ◽  
Marleen Rombouts ◽  
...  
Keyword(s):  
Carbon Nanostructures ◽  
Carbon Capture ◽  
Power Plants ◽  
Point Sources ◽  
Solid Sorbent ◽  
Multiwalled Carbon ◽  
Cycle Times ◽  
Equilibrium And Kinetics ◽  
3D Printed ◽  
Breakthrough Experiments

Processes that utilize solid adsorbents to capture CO2 are promising alternatives to state-of-art Amine based technologies for capturing CO2 from large point sources. Although the energy needs of solid sorbent-based processes are low, the process footprint and consequently the capital cost connected to its implementation can be large due to the relatively long cycle times needed to get the required purity and recovery of the CO2 product. To overcome this challenge, processes having structured adsorbents like laminates, monoliths etc. are needed due to their low pressure drop and better mass transfer characteristics. The aim of this multiscale study is to evaluate the process-based performance of a 3D printed sorbent containing polyethyleneimine (PEI) and multiwalled carbon nanotubes (MWCNT) for capturing CO2 from a biomass fired power plant flue gas. A 6-step vacuum swing adsorption (VSA) cycle was simulated and optimized using equilibrium and kinetics data obtained from volumetry and breakthrough experiments. The optimization study showed that it was possible to achieve purity values &gt;95% and recovery values &gt;90% from dry CO2 feed streams containing 10 and 15% CO2 respectively. The minimum specific energy values were 0.94 and 0.6 MJ/kg and maximum productivity values were 0.8 and 2.2 mol/m3 ads s, respectively, for the two scenarios.

The Effect of TiH2 Particle on Rheological Behaviour of NiTi for Metal Injection Moulding

2017 ◽  
Vol 882 ◽  
pp. 23-27
Author(s):  
Ros Atikah Abdul Kadir ◽  
Nor Hafiez Mohamad Nor ◽  
Istikamah Subuki ◽  
Muhammad Hussain Ismail
Keyword(s):  
Shear Rate ◽  
Titanium Hydride ◽  
Injection Moulding ◽  
Rheological Behaviour ◽  
Nickel Titanium ◽  
Elastic Behaviour ◽  
Capillary Rheometer ◽  
Moulding Process ◽  
Injection Process ◽  
Injection Moulding Process

This paper highlights the influence of titanium hydride particle on the rheological behaviour of nickel-titanium feedstock used in the metal injection process. The ratio of 50at% nickel and 50at% titanium hydride with 2 different powder loadings (65.5vol% and 67.5vol%) were investigated. A Rosand RH2000 capillary rheometer was used to determine the flow behaviour of feedstocks. The feedstocks were characterized at different temperature ranging from 150°C and 170°C and shear rate ranging from 50/s and 4442.63/s. The results showed on pseudo-elastic behaviour flow of NiTi feedstock which is suitable for injection moulding process.

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