Budiyantoro, Cahyo
Program Studi Teknik Mesin Universitas Muhammadiyah Yogyakarta

Published : 4 Documents
Articles

Found 4 Documents
Search

Perancangan Injection Blowing Tools dengan Line Slider untuk Mesin Blow Molding dengan Kapasitas Volume 300 Ml Ikhsan, Subkhan Nur; Budiyantoro, Cahyo; Suwanda, Totok; Nugroho, Adi
JMPM : Jurnal Material dan Proses Manufaktur Vol 2, No 1 (2018): JUNI 2018
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.138 KB)

Abstract

Blow molding machine is a machine that used to produced plastic bottle with injection air system to blowing the soft preform (±100℃)  at 7 bar pressure of air. They are two main components in injection blowing tools i.e, injection tools to distribute the high pressure air from compressor to the bottle preform and the line sliders to make a mold cavity can moving when the injection process ongoing and finished. To build the injection blowing tools, they are several main material that use, on the line sliders use the main material of low carbon steel type A36 ( 0,25% - 0,29% C) with strip and plate with force of 360 Ksi ( 250 MPa ), and the injection tools use the main material of Aluminium-alloy 4032 (Al, Si 12,5%, Mg, Cu, Ni) because it easy to make an model or profil with reasonable price. The main material on the shafts holder injector and blow pin use stainless steel 304 with max force of 515 MPa. The process to joint between the components are applying the welding model with fillet type and average on high of the neck weld 3 mm and use electrodes of RD-260 which E6013 electrode class with maximum strength 60 Ksi and use the bolt and nuts which average from material of SS 304 with size M6 - M16. In  the process injection, the ratio of large development due to the process injection ( BUR ) is 4 with the size of a bottle preform long 99 mm thick 2 mm and diameter 26 mm.
Optimalisasi Parameter Proses Injeksi Menggunakan Simulasi Moldflow untuk Meminimalkan Cycle Time dan Eliminasi Short Shot pada Produk Tempat Anwar, M. Choirul; Budiyantoro, Cahyo; Thoharudin, Thoharudin
JMPM : Jurnal Material dan Proses Manufaktur Vol 2, No 1 (2018): JUNI 2018
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (447.408 KB)

Abstract

Plastic materials in the manufacture of food and household appliances have been widely used by the public. Various forms and functions have been made, one of which is using an injection molding machine. With an injection molding machine a packaging design or a fairly complex household appliance can be produced. One of the products that the market is interested in is a traditional rice container. This traditional rice container product uses polypropylene material. In this rice container production process there are several problems, namely the cycle time that is too long and the occurrence of short shots on the product. Of these problems, simulations and optimizations that have been carried out provide better results. Optimization carried out in this study is the process parameters using moldflow simulation. Confirmation based on S / N Ratio analysis, ANOVA on the best parameters, after the optimization simulation is obtained from the previous time 172.59 seconds to 23.88 seconds. Short shot and cavity weight obtained increased from 96.99 grams to 99.36 grams.
Optimalisasi Sink Mark Index Pada Produk Plastik Dengan Variasi Ketebalan Ekstrim Menggunakan Simulasi Moldflow Budiyantoro, Cahyo
Semesta Teknika Vol 19, No 2 (2016): NOVEMBER 2016
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.547 KB)

Abstract

Injection Molding Process is a closed cycle process involving 4 important factors that influencing product quality such as: process setting parameter, plastic material selection, product design and mold design. Ideally a plastic product is designed with uniform wall thickness since the thickness variation brought about negative effect on the final product. Those negative effects are warpage, sink mark or voids. Warpage is a bending failure of product, void cannot be observed as unfilled or holes on the cross section of the part, whereas sink mark is a deflected mark that can directly be seen on the surface of the part. Those 3 failures are normally caused by material accumulation and thermal rate differentiation. This research was a computerized based simulation using Autodesk MoldFlow Plastic Insight software to predict the 3 failures and to optimize the product quality by Sink Mark Index reduction, minimizing sink mark estimation and volumetric shrinkage  due to extreem thickness variation. The selected specimen was a brush handle, a real product that can easily be found in the market. The errors of brush handle in fact was caused by poor design and the only way to improve its quality is from process parameters point of view. There are 5 possible factors in fixing the failures, each factor possessed 3 level of values, then according to the Taguchi approach of design experiment, there must be 27 experiments to be done. After having 27 times experiments with combination of level and factors, it can be summerized that by combining low melting temperature, high injection pressure and high holding pressure, a sink mark index of 2.642% and a volumetric shrinkage of 19.28% can be obtained, and those were the minimum values representing the best results of product. The extension of holding time did not give a significant influence on the target quality.
Optimasi Keakuratan Dimensi dan Kekasaran Permukaan Potong Material Akrilik dengan Proses Laser Menggunakan Metode Taguchi dan PCR-TOPSIS Nugroho, Adi; Hutama, Adhi Setya; Budiyantoro, Cahyo
JMPM : Jurnal Material dan Proses Manufaktur Vol 2, No 2 (2018): DESEMBER 2018
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

AbstrakMesin laser banyak digunakan di berbagai jenis industri, baik di industri manufaktur dan di industri kerajinan / kreatif. Mesin laser sering digunakan untuk memotong dan mengukir objek yang memiliki bahan yang sulit dan sifat kontur yang tidak dapat dilakukan oleh mesin konvensional. Bahan akrilik sering ditemukan di industri kerajinan dan kreatif yang menggunakan mesin laser. Bahan akrilik dapat diolah menjadi produk bernilai tinggi. Ada berbagai macam produk yang terbuat dari akrilik yang dibentuk melalui proses pemotongan laser, seperti gantungan kunci, souvenir, piala, aksesoris, barang dagangan, plakat, dan produk kreatif. Proses pembuatan menggunakan mesin laser ternyata juga ada masalah, seperti kerataan produk, dan panjangnya tingkat persimpangan. Berdasarkan literasi, peneliti mengoptimalkan beberapa parameter yang ditemukan pada mesin pemotong laser, seperti kecepatan potong, energi yang dibutuhkan, dan jarak nozzle. Hasilnya adalah kehalusan produk yang dihasilkan, dan dimensi sesuai dengan desain. Metode pengujian optimasi yang digunakan adalah metode Taguchi yang dikombinasikan dengan metode PCR (Process Capability Ratio), dan TOPSISAbstractLaser machines are widely used in various types of industries, both in the manufacturing industries and in the craft/creative industries. Laser machines are often used to cut and engrave objects that have difficult material and contour properties that conventional machines cannot do. Acrylic materials are often found in the craft and creative industries that use laser machines. Acrylic materials can be processed into high-value products. There are various kinds of products made from Acrylic which are formed through a laser cutting process, such as key chains, souvenirs, trophies, accessories, merchandise, placards, and creative products. The process of making using a laser machine turns out that there are also problems, such as flatness of the product, and the length of the intersection rate. Based on the literacy, the researcher optimizes several parameters found on laser cutting machines, such as cutting speed, required energy, and nozzle distance. The result is the fineness of the product produced, and the dimensions according to the design. The optimization testing method that used was the Taguchi method which was combined with the PCR (Process Capability Ratio) method, and TOPSIS (Technique for Order Performance by Similarity to Ideal Solution).