scholarly journals Desain dan Pembuatan Cetakan Sistem Injeksi untuk Cetakan Plastik Adonan Donat

2016 ◽  
Vol 3 (2) ◽  
pp. 54
Author(s):  
Syamsul Hadi ◽  
Tandya Nanda Haswari Murti ◽  
Saifudin Kalih Sayekti ◽  
Agus Setiawan
Keyword(s):  
Plastic Material ◽  
Production Costs ◽  
Injection System ◽  
Cooling Systems ◽  
Domestic Industry ◽  
Plastic Molding ◽  
Speed Up ◽  
Design And Manufacture ◽  
Plastic Mold

The problem lies in the length of process, it is hard tomake, and a donut shape (circle-shaped cake and hollow in the middle) are not good made by the domestic industry that created manually (by hand). The purpose of the design and manufacture of plastic mold injection molding system for donuts is to speed up the processing of dough donut with easy and efficient way. Methods of design and manufacture of plastic molding dough donut capacity of 30 product/hour with injection system include: survey for dimensions of donuts on the market, determining the thermal expansion of the dough after frying for the determination of shrinkage in the dimensions of the mold, mold design on the top and bottom, the design of cooling systems, the design for ejection system for mold products, working drawings, machining components, assembly, testing, and the calculation of production costs. The results of the design and manufacture of plastic molding dough donut is a donut molds for parts of the top and bottom made of plastic material types of polypropylene (PP).

scholarly journals Palm H-FAME Production through Partially Hydrogenation using Nickel/Carbon Catalyst to Increase Oxidation Stability

2018 ◽  
Vol 156 ◽  
pp. 03004
Author(s):  
Elsa Ramayeni ◽  
Bambang Heru Susanto ◽  
Dimas Firlyansyah Pratama
Keyword(s):  
Oxidation Stability ◽  
Acid Methyl Ester ◽  
Operating Conditions ◽  
Injection System ◽  
Empirical Measure ◽  
Partial Hydrogenation ◽  
Carbon Catalyst ◽  
Pump System ◽  
Speed Up

One of the methods to improve the oxidation stability of palm biodiesel is through partially hydrogenation. The production using Nickel/Carbon catalyst to speed up the reaction rate. Product is called Palm H-FAME (Hydrogenated FAME). Partial hydrogenation breaks the unsaturated bond on FAME (Fatty Acid Methyl Ester), which is a key component of the determination of oxidative properties. Changes in FAME composition by partial hydrogenation are predicted to change the oxidation stability so it does not cause deposits that can damage the injection system of diesel engine, pump system, and storage tank. Partial hydrogenation is carried out under operating conditions of 120 °C and 6 bar with 100:1, 100:3, 100:5, 100:10 % wt catalyst in the stirred batch autoclave reactor. H-FAME synthesis with 100:5 % wt Ni/C catalyst can decrease the iodine number which is the empirical measure of the number of unsaturated bonds from 91.78 to 82.38 (g-I2/100 g) with an increase of oxidation stability from 585 to 602 minutes.

Design and manufacture of automatic plastic valve welding machine

2021 ◽  
pp. 095440892098821
Author(s):  
Özgür Özdilli
Keyword(s):  
Welding Process ◽  
Production Costs ◽  
Automation System ◽  
Total Production ◽  
Welding Machine ◽  
Integrated Automation System ◽  
Speed Up ◽  
Traditional Manufacturing ◽  
Design And Manufacture ◽  
Plastic Welding

Plastic welding method is a widely used technology for the welding of pressure and vacuum bags using plastic valves. Conducting this process with traditional methods creates disadvantages in terms of production speed, product quality and economical aspects. Today, assembly costs make up the majority of total production costs, manufacturers pay more attention to assembly automation and work in this direction in order to reduce costs, speed up the production process and increase efficiency. In this study, it is aimed to design and manufacture a single Automatic Valve Welding Machine that can do all of these operations and integrated automation system instead of cutting, punching and plastic welding process that can be performed with multiple machines and workers. In this context, a new automated machine was designed in 3 D, and engineering analyzes were carried out to manufacture a prototype. In design, the machine has been made suitable for developing technology by using PLC (Programming Logic Controller) and pneumatic system. In addition, static analyzes of the machine were made. With the inclusion of a production-specific automatic controlled plastic welding machine, manufacturing can be done faster, with higher quality, lower costs and less wastage compared to the traditional manufacturing process.

The Use of TMAH to Etch Silicon and Expose Metal Bridging Failures

2000 ◽  
Author(s):  
Mark Morris ◽  
James Mohr ◽  
Esteban Ortiz ◽  
Steven Englebretson
Keyword(s):  
Failure Mechanism ◽  
Schottky Diodes ◽  
Tetramethylammonium Hydroxide ◽  
Novel Approach ◽  
Failure Location ◽  
Metal Etching ◽  
Plastic Mold

Abstract Determination of metal bridging failures on plastic encapsulated devices is difficult due to the metal etching effects that occur while removing many of the plastic mold compounds. Typically, the acids used to remove the encapsulation are corrosive to the metals that are found within the device. Thus, decapsulation can result in removal of the failure mechanism. Mechanical techniques are often not successful due to damage that results in destruction of the die and failure mechanism. This paper discusses a novel approach to these types of failures using a silicon etch and a backside evaluation. The desirable characteristics of the technique would be to remove the silicon and leave typical device metals unaffected. It would also be preferable that the device passivation and oxides not be etched so that the failure location is not disturbed. The use of Tetramethylammonium Hydroxide (TMAH), was found to fit these prerequisites. The technique was tested on clip attached Schottky diodes that exhibited resistive shorting. The use of the TMAH technique was successful at exposing thin solder bridges that extruded over the edge of the die resulting in failure.

Spectrofluorimetric optosensing of aluminium in a flow injection system: determination of aluminium in dialysis fluids and concentrates

The Analyst ◽  
1990 ◽  
Vol 115 (5) ◽  
pp. 575-579 ◽  
Author(s):  
Maria Rosario Pereiro García ◽  
Marta Elena Díaz García ◽  
Alfredo Sanz-Medel
Keyword(s):  
Flow Injection ◽  
Injection System ◽  
Flow Injection System ◽  
Dialysis Fluids

scholarly journals Study of the Biodegrability of Degradable/Biodegradable Plastic Material in a Controlled Composting Environment

2012 ◽  
Vol 19 (3) ◽  
pp. 347-358 ◽  
Author(s):  
Magdalena Vaverková ◽  
František Toman ◽  
Dana Adamcová ◽  
Jana Kotovicová
Keyword(s):  
Plastic Material ◽  
Laboratory Scale ◽  
Biodegradable Plastic ◽  
Preliminary Evaluation ◽  
The Czech Republic ◽  
Chain Stores ◽  
Plastic Bags ◽  
Plastic Materials ◽  
Scale Test

Study of the Biodegrability of Degradable/Biodegradable Plastic Material in a Controlled Composting EnvironmentThe objective of this study was to determine the degrability/biodegradability of disposable plastic bags available on the market that are labeled as degradable/biodegradable and those certified as compost. The investigated materials were obtained from chain stores in the Czech Republic and Poland. Seven kinds of bags (commercially available) were used in this study. One of them was a disposable bag made of HDPE and mixed with totally degradable plastic additive (TDPA additive). Another was a disposable made of polyethylene with the addition of pro-oxidant additive (d2w additive). One was labeled as 100% degradable within various periods of time, from three months up to three years, and four were certified as compostable. The test was carried out in a controlled composting environment. The biodisintegration degree of the obtained pieces was evaluated following a modified version of ČSN EN 14806 Norm "Packaging - Preliminary evaluation of the disintegration of the packaging materials under simulated composting conditions in a laboratory scale test" and a modified version of ČSN EN ISO 20200 "Plastics - Determination of the degree of disintegration of plastic materials under simulated composting conditions in laboratory-scale test" (ISO 20200:2004). The emphasis was put on determination whether the bags are degradable/biodegradable or not.

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