scholarly journals PENGARUH INJECTION TIME DAN BACKPRESSURE TERHADAP CACAT PENYUSUTAN PADA PRODUK KEMASAN TOPLES DENGAN INJECTION MOLDING MENGGUNAKAN MATERIAL POLISTYRENE

2017 ◽  
Vol 4 (3) ◽  
pp. 15
Author(s):  
U. Wahyudi
Keyword(s):  
Quality Control ◽  
Injection Molding ◽  
Injection Pressure ◽  
Cooling Time ◽  
Injection Time ◽  
Injection Speed

Produk kemasan kue atau toples adalah produk rumah tangga yang sangat dibutuhkan untuk menaruh berbagai macam-macam kue kering, Produk plastik ini terdiri dari badan dan tutup, kedua komponen ini pada saat dirakit memerlukan kepresisian yang lumayan bagus oleh karena material yang digunakan plastik, maka faktor penentuan penyusutan(shrinkage) memegang peranan sangat penting pada saat dicetak dengan mesin injection molding yang menggunakan material polistyrene. Pada saat produksi pernah terjadi kegagalan produk fitting terlalu kencang dan ada juga fitting yang kendor antara tutup dengan badan akibatnya produk tidak lolos produksi oleh quality control. Didalam tugas akhir ini penulis melakukan langkah-langkah bagaimana teknik menganalisa cacat penyusutan (shrinkage) material plastik terutama di khususkan material polystyrene dimulai dari proses injection molding lalu diambil sampel produk dengan tingkat pengujian yang berbeda lewat settingan parameter. Dengan waktu injeksi dan backpressure yang berbeda-beda akan menghasilkan ukuran produk dan nilai shrinkage yang berbeda pula. Nilai temperatur leleh yang baik digunakan untuk material polistyrene dengan ketebalan produk kemasan toples 0,75 mm, diameter produk 140,94 mm dan tinggi 58,29 mm. berkisar antara 2400C – 3100C. Cacat penyusutan pada material polystyrene pasti ada walaupun tidak sebesar pada material lain seperti PP dan LDPE dan bisa diminimalkan dengan setting parameter proses yang bagus. Nilai shrinkage yang baik dan ideal dan sesuai standar terjadi pada settingan backpressure 30 kgf/cm² dengan waktu injeksi yaitu 2 detik. Dengan  parameter yang konstan, mulai dari injection speed 120 cm/s, 65 cm/s. Injection pressure 1400 kgf/cm² dan pack pressure 1200 kgf/cm², pack time 0,5 sec, Shot size 55 mm, kemudian cooling time 2 detik dengan temperatur mold 600 C.

scholarly journals Optimization of Process Parameters for Vertical-Faced Polypropylene Bottle Injection Molding

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Youmin Wang ◽  
Zhichao Yan ◽  
Xuejun Shan
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Dwell Time ◽  
Optimization Problem ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Orthogonal Test ◽  
Injection Molding Process ◽  
Injection Time ◽  
Melt Temperature

In order to obtain the optimal combination of process parameters for vertical-faced polypropylene bottle injection molding, with UG, the model of the bottle was drawn, and then, one module and sixteen-cavity injection molding system was established and analyzed using Moldflow. For filling and maintaining pressure during the process of infusion bottle injection molding, the orthogonal test table L25 (56) using CAE was designed for injection molding of the bottle, with six parameters such as melt temperature, mold temperature, injection pressure, injection time, dwell pressure, and dwell time as orthogonal test factors. By finding the best combination of process parameters, the orthogonal experiment was completed, the results were analyzed by range analysis, and the order of influence of each process parameter on each direction of optimization was obtained. The prediction dates of the infusion bottle were gained under various parameters, a comprehensive quality evaluation index of the bottle was formulated, and the multiobjective optimization problem of injection molding process was transformed into a single-objective optimization problem by the integrated weighted score method. The bottle parameters were optimized by analyzing the range date of the weighted scoring method, and the best parameter combination such as melt temperature 200°C, mold temperature 80°C, injection pressure 40 MPa, injection time 2.1 S, dwell pressure 40 MPa, and dwell time 40 S was gained.

Effect of Processing Conditions on the Shrinkage and Warpage of Glass Fiber Reinforced PP Using Microcellular Injection Molding

2012 ◽  
Vol 501 ◽  
pp. 294-299 ◽  
Author(s):  
Zhi Bian ◽  
Peng Cheng Xie ◽  
Yu Mei Ding ◽  
Wei Min Yang
Keyword(s):  
Injection Molding ◽  
Glass Fiber ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Process Conditions ◽  
Fiber Reinforced ◽  
Injection Speed ◽  
Glass Fiber Reinforced ◽  
Microcellular Injection Molding ◽  
Molded Parts

This study was aimed at understanding how the process conditions affected the dimensional stability of glass fiber reinforced PP by microcellular injection molding. A design of experiments (DOE) was performed and plane test specimens were produced for the shrinkage and warpage analysis. Injection molding trials were performed by systematically adjusting six process parameters (i.e., Injection speed, Injection pressure, Shot temperature, SCF level, Mold temperature, and Cooling time). By analyzing the statistically significant main and two-factor interaction effects, the results showed that the supercritical fluid (SCF) level and the injection speed affected the shrinkage and warpage of microcellular injection molded parts the most.

Effects of process parameters on the formability of sheet metal during plastic injection forming

2020 ◽  
Vol 62 (5) ◽  
pp. 535-543
Author(s):  
Mirigul Altan ◽  
Bora Sener ◽  
Mirigul Altan
Keyword(s):  
Injection Molding ◽  
Sheet Metal ◽  
Injection Pressure ◽  
Industrial Applications ◽  
Effective Parameter ◽  
Melt Temperature ◽  
Injection Speed ◽  
Aluminum Sheets ◽  
Plastic Injection ◽  
Thinning Rate

Abstract Plastic injection forming (PIF) is an alternative sheet metal forming method for complex geometrical parts with dimensions in low tolerance. This method is a combination of injection molding and hydroforming in which a molten polymer material has been injected over a sheet metal via a plastic injection molding machine. In this study, aluminum sheets 1.5 mm thick were shaped by PIF at various injection pressures, melt temperatures and injection speed. The effects of these parameters on the formability of the sheet metal were investigated using the experimental design technique. The thinning rate, flange radius and the hardness values of the shaped sheets were considered in the experimental study. Injection pressure was found to be the most effective parameter and melt temperature was the second degree effective parameter for the thinning rate. The usability of the PIF process in industrial applications as an alternative method was emphasized by comparing PIF with conventional hydroforming by means of the finite element method (Ls-Dyna). A 2.07 % deviation was observed between the FE results for hydroforming and the experimental results for PIF.

ANALISIS PARAMETER INJECTION MOLDING TERHADAP WAKTU SIKLUS DAN CACAT FLASH PRODUK TUTUP BOTOL 180 ML MENGGUNAKAN METODE TAGUCHI

ROTOR ◽  
2017 ◽  
Vol 10 (1) ◽  
pp. 45
Author(s):  
Andika Wahyu Prasanko ◽  
Dwi Djumhariyanto ◽  
Agus Triono
Keyword(s):  
Injection Molding ◽  
Taguchi Method ◽  
Cycle Time ◽  
Human Life ◽  
Injection Pressure ◽  
Injection Speed ◽  
Beverage Industry ◽  
Food And Beverage Industry ◽  
Food And Beverage ◽  
Nozzle Temperature

At present plastic becomes inseparable from human life especially in the food and beverage industry. One of the methods used in the manufacturing process of plastic products is injection molding. Injection molding is one of manufacturing technique that consists of a series of cyclical processes and is used to produce thermoplastic materials. The effect of the combination of process parameters impact on the product results such as the quantity and quality of the product, the non-conformity of the parameters causes the production to be not optimal. One method that can be used for optimization is the taguchi method. The taguchi method is a set of special matrices called orthoghonal arrays that are used as reference in the determination combination of parameters and level values. The purpose of this research is to determine the optimal cycle time and net of the product on the process of making 180 ml bottle cap but by minimizing flash defects. The method used in this phase is ANOVA, and the calculation of taguchi method by using minitab 16 software. From the result of the research, the result of optimal condition is combination injection pressure 1320 bar, injection speed 50 mm/s, holding pressure 300 bar, and nozzle temperature 255oC produces a cycle time value of 15.72 seconds and netto 3.56 grams. This result is better than the setting of the company that produces 16.66 seconds cycle time and entered in the net range of 4 ± 0.5 grams resulting in an increase in production of 5.97%. While with combination of injection pressure 1280 bar, injection speed 50 mm / s, holding pressure 300 bar, and nozzle temperature 245oC resulted in fewer number of flash defects compared to company setting that is 12 units from 80 units of sample. Keywords: flash deffect, injection molding, taguchi method, cycle time

Optimization and Design for Parameter in Injection Molding Technology of Cell Shell of Polypropylene

2011 ◽  
Vol 189-193 ◽  
pp. 537-540
Author(s):  
Jia Min Zhang ◽  
Ming Yi Zhu ◽  
Zhao Xun Lian ◽  
Rong Zhu
Keyword(s):  
Injection Molding ◽  
Injection Pressure ◽  
Mold Temperature ◽  
Injection Molding Process ◽  
Technological Parameters ◽  
Molding Process ◽  
Melt Temperature ◽  
Injection Speed ◽  
Technical Parameters ◽  
High Degree

The use of L27 (35) orthogonal to the battery shell injection molding process is optimized. The main factors of technical parameters were determined mould temperature, melt temperature, the speed of injection, injection pressure, cooling time.On the basis of actual production, to determine the factors values of different process parameters.Combination of scrapped products in key (reduction and a high degree of tolerance deflated) tests were selected in the process parameters within the scope of the assessment. Various factors impact on the product of the total height followed by cooling time, mold temperature, melt temperature, injection pressure, injection speed from strong to weak .The best products technological parameters were determined.Good results were obtained for production.

Optimisation of Processing Condition Using Taguchi Method on Warpage for HDPE-Clay Composite

2014 ◽  
Vol 660 ◽  
pp. 28-32 ◽  
Author(s):  
Mohd Halim Irwan Ibrahim ◽  
M.H.A. Manaff ◽  
M.H. Othman ◽  
N. Mustafa ◽  
S.R. Masrol ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Signal To Noise Ratio ◽  
Processing Condition ◽  
Injection Pressure ◽  
Cooling Time ◽  
Screening Tests ◽  
Ratio Analysis ◽  
Signal To Noise ◽  
Melt Temperature ◽  
Injection Speed

Injection molding is one of the most important processes in manufacturing nowadays. Thus, attention must be give towards the optimization of the product defects. Parameters have been chosen by screening tests to improve the process quality. The main purpose of this study is to optimize the processing condition using Taguchi Method on shrinkage for HDPE-Clay specimen. The experiment starts by preparing the mixture between HDPE and clay. Then, screening test is conducted to obtain the parameters. The parameters are melt temperature, injection speed, injection pressure and cooling time. By using the array orthogonal L9 (34), signal to noise ratio and ANOVA were conducted. Based on the S / N ratio analysis, best combination can be produced for warpage (melt temperature: 190°C, injection speed: 40%, injection pressure: 30% and cooling time: 3 seconds). While for ANOVA, melt temperature is most significant with 60.28% for warpage.

The Applied Study Based on the Injection Molding Mechanism of Microcellular Foamed Plastics (MCFP)

2014 ◽  
Vol 709 ◽  
pp. 374-379
Author(s):  
Yi Jun Huang
Keyword(s):  
Injection Molding ◽  
Engineering Application ◽  
Injection Pressure ◽  
Injection Molding Process ◽  
Injection Time ◽  
Molding Process ◽  
Melt Temperature ◽  
Applied Study ◽  
Foamed Plastics ◽  
Plastics Injection Molding

Injection molding is one of several molding technology of microcellular foamed plastics. This paper mainly discusses the injection molding mechanism and applications of microcellular foamed plastics here, and analyzes the influence of microcellular foamed plastics injection molding process parameters, including injection pressure, melt temperature, injection time, etc.; At the same time, this paper makes a more systematic discussions for the injection molding technology of microcellular foamed plastics, and the typical cases of microcellular foamed plastics in engineering application are introduced in detail.

Process Factor Optimization for Reducing Warpage and Shrinkage in Injection Molding Using Design of Experiments

2014 ◽  
Vol 541-542 ◽  
pp. 359-362 ◽  
Author(s):  
Gyung Ju Kang
Keyword(s):  
Injection Molding ◽  
Design Of Experiments ◽  
Optimization Method ◽  
Processing Parameters ◽  
Cooling Time ◽  
Volumetric Shrinkage ◽  
Injection Time ◽  
Taguchi Optimization ◽  
Process Factor ◽  
Packing Pressure

This Paper Presents the Optimization of Injection Molding Conditions to Minimize the Warpage and Volumetric Shrinkage Using Design of Experiments and Taguchi Optimization Method. Considering the Process Parameters such as Injection Time, Packing Pressure, Packing Pressure Time, and Cooling Time, a Series of Mold Analysis are Performed. Orthogonal Arrays of Taguchi, the Signal-to-Noise(S/N) and Analysis of Variance (ANOVA) are Utilized to Determine the Optimization Parameter Levels and to Find out Principal Processing Parameters on Warpage and Volumetric Shrinkage. from the Results it is Clear that Warpage and Volumetric Shrinkage are Reduced. also, the Dominant Parameters were Cooling Time and Packing Time for Warpage, on the other Hand, the most Important Factor for Shrinkage was Injection Time. from this, it can be Concluded that Taguchi Method is very Suitable to Solve the Warpage and Volumetric Shrinkage Problems in Injection Molding Parts.

scholarly journals Optimization on the Injection Molding Propypopylene Parameters Using Central Composite Design for Minimizing Defects

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Moh. Hartono ◽  
Pratikto ◽  
Purnomo B. Santoso ◽  
Sugiono
Keyword(s):  
Injection Molding ◽  
Central Composite Design ◽  
Injection Pressure ◽  
Holding Time ◽  
Clamping Force ◽  
Molding Process ◽  
Injection Speed ◽  
Injection Temperature ◽  
Central Composite ◽  
Plastic Products

This study aims to simultaneously forecast and investigate the optimization process characterization of the design of controlled parameters in the injection process of polypropylene molding including injection pressure combination, clamping force, injection temperature, injection speed, and holding time, and their interaction to produce qualified plastic by minimizing defects. The experimental methods used the central composite design of response surface method with five factors and a variety of levels. This method is more effective because it is an improvement on and a development from previous studies—especially those related to the plastic molding process. Additionally, it can simultaneously predict and optimize the obtaining of the highest quality plastic products as well as minimizing defects. The results are in the form of a combination of control level factors and interactions among the factors that generate the robust output of plastic products with minimum defects. Moreover, the optimum settings of the parameters provides a global solution at an injection temperature of 275°C, injection pressure of 75 bar, injection speed of 98%, clamping force of 88 tons, and a holding time of 8 seconds to generate a response to product probability defects by 0.0062. The benefit is that it can reveal the behavior and characteristics of parameter design and their interactions in the plastic injection molding process to produce qualified plastics and minimize product defects.

Study on Shrinkage of Injection Molding Biodegradable Materials

2006 ◽  
Vol 505-507 ◽  
pp. 199-204
Author(s):  
Yih Lin Cheng ◽  
Ying Wei Lee
Keyword(s):  
Injection Molding ◽  
Mass Production ◽  
Injection Pressure ◽  
Environmental Concerns ◽  
Biodegradable Materials ◽  
Medical Applications ◽  
Injection Speed ◽  
Major Index ◽  
Production Processes ◽  
Optimal Injection

Due to environmental concerns, biodegradable materials, which are currently used in many medical applications, are being considered as a candidate for replace plastics in the future. One of the most common mass production processes to shape biodegradable materials is injection molding. However, the material manufacturers usually do not provide optimized parameter information. In this research, two biodegradable materials, PLA 3001D and Biomax, are investigated. Experiments are conducted utilizing the Taguchi method to determine optimal injection molding parameters, which include injection speed, injection pressure, holding pressure, and cooling time. Shrinkage was the major index to evaluate the injection results. As a result, the best combinations of parameters were determined.

Sign in / Sign up

Export Citation Format

Share Document