scholarly journals Design and simulation of components of vacuum forming machine using household vacuum cleaner

2021 ◽  
Vol 1 (1) ◽  
pp. 138-157
Author(s):  
Navaraj Adhikari ◽  
Nirajan Sharma Timilsina ◽  
Sanskar Gautam ◽  
Snehraj Kaphle ◽  
Pratisthit Lal Shrestha
Keyword(s):  
Human Life ◽  
Forming Process ◽  
Load Bearing Capacity ◽  
Vacuum Cleaner ◽  
Plastic Sheet ◽  
Nichrome Wire ◽  
Spiral Path ◽  
Household Products ◽  
Vacuum Forming ◽  
Thermoforming Process

Plastic products ranging from toothbrushes to smartphones are an inseparable commodity in daily human life and their impact cannot be underestimated. This paper aims to design and simulate the vacuum forming process using readily available materials in context of Nepal. Vacuum forming process is a thermoforming process where the heated plastic sheet derives the shape of the mold through the application of vacuum and is used to make packaging products and other household products. Simulations were done to find out the optimum distance between the plastic sheet and the heater, arrangement of the wire in the heater, load bearing capacity of the design and the flow of vacuum in the arrangement. Nichrome wire coiled as heater coil is used as the heating material and laid in a spiral path with the plastic sheet 35mm below provided the best heating results and 1800W vacuum cleaner provided the necessary pressure of 85-90kPa and velocities of 100- 115m/s while the steel posts provided adequate strength.

Experimental and simulation studies on the mold replicability in the thermoforming process

2019 ◽  
Vol 39 (4) ◽  
pp. 397-405 ◽  
Author(s):  
Navid Namdari ◽  
Peiman Mosaddegh
Keyword(s):  
Process Parameters ◽  
Sheet Thickness ◽  
Material Model ◽  
High Impact ◽  
Simulation Studies ◽  
The Finite Element Method ◽  
Forming Process ◽  
Profile Deviation ◽  
Vacuum Forming ◽  
Thermoforming Process

Abstract In the precision thermoforming process, one of the main drawbacks occurs in the profile deviation of the produced part. In this study, the effect of different thermoforming process parameters on the mold replicability of a high impact polystyrene container produced by vacuum forming and drape forming processes has been experimentally and numerically investigated. According to experimental results, in the drape forming process, when the initial sheet thickness increases, the part will have higher mold replicability, whereas in the vacuum forming process, by increasing the initial sheet thickness, the mold replicability increases and reaches its peak, then decreases. The results also indicate that both temperature and vacuum pressure exhibit the most significant effect on mold replicability of the part. Furthermore, the finite element method is utilized by the implementation of a fully thermomechanically coupled hyperviscoelastic constitutive model in ABAQUS 6.13. By using this material model, it is possible to compare the sensitivity of the output (mold replicability of the part) to the changes in the range of the process parameters. The simulation results verified by the experimental data and the hyperviscoelastic model showed to be an outstanding and stable platform for the process simulation.

Structural Design and Forming Method of Single-Curved Surface Structure Based on Miura-Origami

2016 ◽  
Author(s):  
Hairui Wang ◽  
Chunfang Guo ◽  
Yujie Li ◽  
Yahua Liu ◽  
Minjie Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Structural Design ◽  
High Efficiency ◽  
Circular Tube ◽  
Great Influence ◽  
Curved Surface ◽  
Structural Performance ◽  
Forming Process ◽  
Structural Support ◽  
Vacuum Forming

With the advantage of high adaptability, Miura-origami structure with curvature shows various engineering applications such as a sandwich between two stiff facings with curvature requirements and structural support to form a circular tube. In this research, a forming method of polymer circular tube with single-curved surface origami expressed by five parameters was established and its corresponding theory was solved considering forming rationality in actual manufacturing. The components of circular tube were fabricated by the vacuum forming process and then spliced together. We conducted numerical simulation to analyze the structural performance of the tube with five parameters and shown that these parameters have a great influence on energy absorbed performance. Finally, a male mold of a part with Arc Miura-origami structure was designed and fabricated. The parts with Arc Miura-origami were manufactured using vacuum forming process and then spliced and bonded together into a two-layer tube. This research may provide a method to design and fabricate Miura-origami structure with high efficiency and quality.

Process Optimization for Suction Plastic Forming of In-Mold Decoration Plastic Sheet with CAE

2010 ◽  
Vol 102-104 ◽  
pp. 74-78
Author(s):  
Bin Gao ◽  
Xiu Rong Nan ◽  
Bai Zhong Wu
Keyword(s):  
Process Optimization ◽  
Thin Shell ◽  
Optimization Methods ◽  
Analysis Software ◽  
Optimization Scheme ◽  
Forming Process ◽  
Element Analysis ◽  
Plastic Sheet ◽  
Mesh Model ◽  
Plastic Forming

The suction plastic forming process for in-mold decoration plastic sheet has been the best process for thin-shell plastic exterior decoration parts. But the suction plastic forming products still suffers from the uneven thickness. Based on the general finite element analysis software POLYFLOW for viscoelastic fluid, a set of optimization methods for suction plastic forming process of in-mold decoration plastic sheet is introduced in this paper to reduce the uneven level of thickness. These methods include establishing process optimization scheme, building mesh model, selecting the material constitutive model and determining its parameters, imposing boundary conditions and blowing pressure, and applying the mold movement. Finally, the optimized suction plastic forming process is used to produce the in-mold decoration plastic rear bumper sample of an automobile, and the results show that optimized process is effective and applicable.

Vacuum Forming Refrigerator Inner Liner Structural Optimization

2011 ◽  
Vol 291-294 ◽  
pp. 1069-1073
Author(s):  
Wen Bin Su ◽  
Xiang Bing Sun ◽  
Tao Li ◽  
Bao Jian Liu
Keyword(s):  
Numerical Simulation ◽  
Structural Optimization ◽  
Structural Parameters ◽  
Forming Process ◽  
Significance Level ◽  
Orthogonal Experiments ◽  
Combination Scheme ◽  
Vacuum Forming ◽  
Validation Experiment

Thickness thinning is the principal quality problem in the vacuum forming process of the refrigerator inner liner. In this paper, the structural parameters of refrigerator inner liner were analyzed based on orthogonal experiments and numerical simulation. Optimized structural parameters combination scheme and the significance level of structural parameters to thickness were obtained by analyzing the results of orthogonal experiments. Validation experiment results shown that the quality of refrigerator inner liner based on the optimized structural parameters combination scheme improved effectively.

HIGH THROUGHPUT BLOOD PUMP MANUFACTURING WITH VACUUM FORMING PROCESS

ASAIO Journal ◽  
2006 ◽  
Vol 52 (2) ◽  
pp. 55A
Author(s):  
Changmo Hwang ◽  
Kyung Hyun Kim ◽  
Gi Seog Jeong ◽  
Chi Beom Ahn ◽  
Bum Soo Kim ◽  
...  
Keyword(s):  
High Throughput ◽  
Blood Pump ◽  
Forming Process ◽  
Vacuum Forming

Experimental and numerical investigations of the vacuum-forming process

1992 ◽  
Vol 32 (16) ◽  
pp. 1163-1173 ◽  
Author(s):  
C. A. Taylor ◽  
H. G. Delorenzi ◽  
D. O. Kazmer
Keyword(s):  
Forming Process ◽  
Numerical Investigations ◽  
Vacuum Forming

scholarly journals RANCANG BANGUN MOLD UNTUK PROSES TERMOFORMING PROSTHETIC BELOW KNEE (B/K)

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
Bambang Waluyo Febriantoko ◽  
Aris Aryanto ◽  
Tri Widodo Besar Riyadi
Keyword(s):  
Plastic Material ◽  
Forming Process ◽  
Temperature Variations ◽  
Plastic Shrinkage ◽  
Pressing Process ◽  
Plastic Forming ◽  
Thermoforming Process ◽  
Good Expansion

ABSTRAK Industri semakin berkembang, kebutuhan terhadap plastik pun semakin bertambah. Akan tetapi, dalam aplikasi proses pembentukan plastik sering mengalami kendala. Salah satunya adalah penyusutan. Penyusutan sering terjadi pada proses pembentukan plastik, terutama pembentukan dengan sistem mechanical thermoforming. Sehingga perlu dianalisis hal-hal yang menyebabkan penyusutan pada produk yang dihasilkan. Beberapa hal yang diidentifikasi mempengaruhi terjadinya penyusutan adalah bentuk mold, temperatur, dan jenis plastik yang digunakan.Metode penelitian yang digunakan adalah membuat alat uji mechanical thermoforming dan  membuat  mold  yang  akan  digunakan  untuk  menganalisis  penyusutan.  Mold yang digunakan ada 2 macam, yaitu mold telapak kaki atas dan mold telapak kaki bawah. Selain variasi pada mold, analisis juga ditujukan pada temperatur plastik polypropylene (PP) dan plastik PVC yang akan diproses. Variasi temperatur yaitu:1000C,  1200C,  dan  140oC.  Sedangkan  jenis  plastik  yang  diujikan  adalah  plastikpolypropylene (PP) dan plastik PVC.Dari data hasil pengujian dan pembahasan pada proses mechanical thermoforming untuk plastik polypropylene (PP) dengan ketebalan 1,0 mm tidak dapat dianalisis persentase penyusutan yang terjadi karena sifat viskos pada plastik rendah. Pada plastik jenis PP ini meskipun membentuk pola, tetapi tidak sempurna. Bahan plastik PP setelah proses penekanan dengan temperatur 100ºC-120ºC plastik tidak mengalami pemuaian yang cukup baik, karena plastik masih bersifat elastik. Pada temperatur140ºC plastik mengalami pemuaian, tetapi saat proses penekanan plastik mengalami bentuk pola yang tidak sempurna, karena temperatur terlalu tinggi. Sedangkan pada plastik PVC didapatkan hasil bahwa pada mold telapak kaki atas dengan ketinggian2 cm dan tebal plastik 1,0 mm menghasilkan persentase penyusutan rata-rata 7,85% dengan temperatur 100ºC, 9,80% dengan temperatur 120ºC dan 12,11% dengan temperatur 140ºC. Pada mold telapak kaki bawah dengan ketinggian 2 cm dan tebal plastik 1,0 mm menghasilkan persentase penyusutan rata-rata 10,01% dengan temperatur 100ºC, 10,96% dengan temperatur 120ºC dan 12,08% dengan temperatur140ºC. Kata Kunci: Mechanical thermoforming, penyusutan plastik, mold ABSTRACT The growing of industry has the effect to the increase of plastic need.  However, the application of plastic forming process often experiences constraints. One of them is depreciation. Depreciation often occurs in the plastic forming process, especially forming with mechanical thermoforming system. So it is necessary to analyze the things that cause shrinkage on the product. Some of the things that are identified to influence the shrinkage are the molds, temperatures and types of used plastics.The used method is to make mechanical thermoforming test and make mold which will be used to analyze depreciation. There are 2 kinds of molds, namely upper foot sole mold and bottom foot sole mold. In addition to the variations of the mold, the analysis is also aimed at the temperature of polypropylene plastic (PP) and PVC plastic which will be processed. The temperature variations are 1000C, 1200C and 140oC and the types of plastics that are tested is polypropylene plastic (PP) and PVC plastic.The results show that on mechanical thermoforming process for polypropylene (PP) plastic with 1.0 mm thickness, the percentage of shrinkage can not be analyzed because of the low viscous nature of plastic. PP type plastic can form a pattern, but not perfect. PP plastic material does not experience a good expansion after pressing process with100ºC-120ºC plastic temperature. This is because the plastic is still elastic. At 140ºC, the plastic undergoes expansion, but when the plastic pressing process, it undergoes an imperfect pattern. The reason is the temperature is too high. Meanwhile for the PVC plastic, it was found that in the upper foot sole mold with height of 2 cm and 1.0 mm plastic thickness, the percentages of shrinkage average are 7.85% with temperature100ºC, 9.80% with temperature 120ºC and 12.11% with temperature of 140ºC. In the bottom foot sole mold with 2 cm height and 1.0 mm plastic thickness, the percentages of shrinkage average are 10.01% with temperature 100ºC, 10.96% with temperature120ºC and 12.08% with temperature 140ºC. Keywords: Mechanical thermoforming, plastic shrinkage, mold

scholarly journals Innovation in Aircraft Cabin Interior Panels. Part II: Technical Assessment on Replacing Glass Fiber with Thermoplastic Polymers and Panels Fabricated Using Vacuum Forming Process

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3258
Author(s):  
Edgar Adrián Franco-Urquiza ◽  
Perla Itzel Alcántara Llanas ◽  
Victoria Rentería-Rodríguez ◽  
Raúl Samir Saleme ◽  
Rodrigo Ramírez Aguilar ◽  
...  
Keyword(s):  
Polyurethane Foams ◽  
Future Research ◽  
Sandwich Composites ◽  
Thermoplastic Polymers ◽  
Forming Process ◽  
Molding Process ◽  
Aircraft Cabin ◽  
Vacuum Forming ◽  
Structural Applications ◽  
Cabin Interior

The manufacturing process of the aircraft cabin interior panels is expensive and time-consuming, and the resulting panel requires rework due to damages that occurred during their fabrication. The aircraft interior panels must meet structural requirements; hence sandwich composites of a honeycomb core covered with two layers of pre-impregnated fiberglass skin are used. Flat sandwich composites are transformed into panels with complex shapes or geometries using the compression molding process, leading to advanced manufacturing challenges. Some aircraft interior panels are required for non-structural applications; hence sandwich composites can be substituted by cheaper alternative materials and transformed using disruptive manufacturing techniques. This paper evaluates the feasibility of replacing the honeycomb and fiberglass skin layers core with rigid polyurethane foams and thermoplastic polymers. The results show that the structural composites have higher mechanical performances than the proposed sandwich composites, but they are compatible with non-structural applications. Sandwich composite fabrication using the vacuum forming process is feasible for developing non-structural panels. This manufacturing technique is fast, easy, economical, and ecological as it uses recyclable materials. The vacuum forming also covers the entire panel, thus eliminating tapestries, paints, or finishes to the aircraft interior panels. The conclusion of the article describes the focus of future research.

Numerical Simulation Techniques for Hollow Vacuum Forming of Double-Layered Plastic Sheets

2010 ◽  
Vol 154-155 ◽  
pp. 68-73
Author(s):  
Bin Gao ◽  
Bai Zhong Wu
Keyword(s):  
Numerical Simulation ◽  
Theoretical Calculation ◽  
Temperature Variation ◽  
New Products ◽  
Simulation Method ◽  
Simulation Software ◽  
New Materials ◽  
Forming Process ◽  
Simulation Techniques ◽  
Vacuum Forming

Products made from double-layered hollow vacuum forming are widely used for their various advantages. The hollow vacuum forming process has been studied in this paper. Numerical simulation method for the hollow vacuum forming process of double-layered plastic sheets has been introduced by the simulation software Polyflow, which is suitable for viscoelasticity fluid bodies. This method can vividly and intuitively estimate the thickness, temperature variation and distribution in the double-layered vacuum forming processes. Based on this method, reliably theoretical calculation data can be provided to design the reasonable vacuum forming process for double-layered vacuum forming of new materials or new products. The proposed method has been verified to be applicable and effective by prototype fabrications.

scholarly journals Validation of a Simulation Methodology for Thermoplastic and Thermosetting Composite Materials Considering the Effect of Forming Process on the Structural Performance

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2801
Author(s):  
Lorenzo Sisca ◽  
Patrizio Tiziano Locatelli Quacchia ◽  
Alessandro Messana ◽  
Andrea Giancarlo Airale ◽  
Alessandro Ferraris ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Research Work ◽  
Thickness Variation ◽  
Forming Process ◽  
Element Analysis ◽  
Mapping Tool ◽  
The Press ◽  
Thermoforming Process ◽  
Thermosetting Composite

This research work investigated the influence of the press molding manufacturing process on the mechanical properties, both for thermoplastic and thermosetting fiber reinforced composite materials. The particular geometry of the case study, called Double Dome, was considered in order to verify the behavior of the Thermoplastic and Thermosetting prepreg in terms of shell thickness variation and fibers shear angle evolution during the thermoforming process. The thermoforming simulation was performed using LS-DYNA® Finite Element Analysis (FEA) code, and the results were transferred by Envyo®, a dedicated mapping tool, into a LS-DYNA® virtual model for the structural simulation. A series of Double Dome specimens was produced with industrial equipment, and a bending experimental test was been carried on. Finally, a numerical-experimental correlation was performed, highlighting a significant forecast of the mechanical properties for the considered component.

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