Journal of Manufacturing & Management Technology

The Effect of Process Parameter on Penetration in FCAW of Fillet Joint High Strength Steel for Heavy Equipment

Tue, 31 Dec 2024 00:00:00 +0700

This research study aims to find the weld penetration of Flux Core Arc Welding (FCAW) of Quenched and Tempered High Strength Steel for heavy equipment. To study the effected of welding condition as the welding current, arc volt and gas shielding with flux core arc welding process. By determined the welding current 160, 180 and 200 Amp and arc voltage 20, 22, 24 V respectively. Welding on flat and horizontal position with Argon, Carbon dioxide and Argon mixed Carbon dioxide shielding gas. To compare the welding penetration, relate with the welding current, arc voltage and gas shielding by inspection of weld quality as weld profile, penetration, width of weld and compare the mechanical test with microstructure. The experimental procedure preparation of base metal is quench and tempered high strength steel has the dimension of width 100 mm long 300 mm and thickness 10 mm. Use the solid wire electrode flux core wire E111T1-GC H4 diameter 1.2 mm. Welding speed 15 cm/min, electrode extension 18 mm. The result shows the highest of weld penetration occur from the high welding current of 200 Ampere, 24 Voltage and gas mixed between Ar and CO₂ with flat welding position. In the welding condition produce the weld profile are symmetry the leg of weld is flat with the surface of fillet base metal is show the excellent of penetration of weld metal with base metal. The macrostructure show the leg penetration are excellent.

Key Word: Weld Penetration, High Strength Steel, Penetration, welding Microstructure and Gas Shielding

Production Of RDF-5 Fuel From Waste Within Rajamangala University of Technology Tawan-ok Chanthaburi Campus

Sommart Sripratuang, Thiti Mhoraksa, Surapong Sotong — Tue, 31 Dec 2024 00:00:00 +0700

This research aims to implement solid waste management practices for the production of RDF-5 fuel at Rajamangala University of Technology Tawan-ok Chantaburi Campus. to be used in conjunction with coal in the industry. and analysis of manufacturing costs. Waste used in production including paper, plastic, twigs and leaves waste as the raw material for RDF-5 fuel production, with tapioca starch 2 percent by weight as binder. The research identifies four production steps, including gathering materials, reducing waste size, mixing waste materials with tapioca starch, and compressing with hydraulic press. The research tested the RDF-5 fuel with ASTM standards, including ASTM D 240, ASTM D 3173, ASTM D 3174, ASTM E 75, and timer in the burning of RDF-5 fuel. in finding the right mix Will study from 4 ingredients, namely 50:50:50 (grams), 75:50:50 (grams), 50:75:50 (grams) and 50:50:75 (grams). The study conducted four experiments to determine the optimal mixture, which resulted in 50:50:75 (grams) paper, plastic, twigs and leaves. The research found that the heat value of RDF-5 fuel is 5,842.09 Cal/g, moisture content is 6.62 percent, ash content is 8 percent, and density is 968.18 Kg/m³. The burning time is 27.57minutes. (The calorific value is not lower than the standard of 5,000 calories per grams, The moisture value does not exceed the standard 10 percent, The ash content does not exceed the standard 20 percent and The density is not lower than the standard 600 kg/m³ respectively). 1) The waste reduction results showed that there was a large amount of waste generated in Rajamangala University of Technology Tawan Tawan-ok. Chanthaburi Campus, 261.43 kg per day Production of RDF-5 fuel in the best blend It weighs 175 grams Divided into 50 grams of paper, 50 grams of plastic, and 50 grams of twigs and leaves When used to produce RDF-5 fuel in the amount of 1 kg per day will be able to reduce the amount of waste in Rajamangala University of Technology Tawan Tawan-ok Chanthaburi Campus 0.38 percent per day. 2) The research also found that RDF-5 fuel can be used with coal to increase heat and efficiency while reducing coal consumption. 3) The cost of production of RDF-5 fuel was found to be 7.85 baht per kilogram.

Composite sheet for indoor decoration from recycled thermoplastic waste reinforced by textile wastes of loincloth

Jirawat Jai-u, Siraphop Raddussadee, Ponlapath Tipboonsri — Tue, 31 Dec 2024 00:00:00 +0700

Composite sheets for indoor decoration from recycled thermoplastic waste reinforced by textile wastes of loincloth are made using 4 kinds of packaging plastic, including HDPE, LDPE, PP, and PLA, which are compressed by compression molding, which loincloth is reinforced. In the experiment, loincloth layers were used with 3, 5, 7, and 9 layers. Thermoplastic layers and loincloth layers were stacked together, and they are compressed with a ratio of thermoplastic layers and loincloth layers at 50-50, 40-60, and 30-70 wt%. The compression conditions were set up at a pressure of 10.34 Bar, a forming temperature of 200°C, and a forming time of 10 minutes. A composite sheet size was 200 x 200 mm. After that, a composite sheet was prepared to investigate with a tensile test and microstructure. The results showed that tensile strength increased with the increase of the loincloth layer. Meanwhile, tensile strength decreased with the increase of thermoplastic layers. The highest mechanical properties were using the loincloth of 9 layers and a ratio of thermoplastic layers and loincloth layers at 50-50. All 4 kinds of thermoplastics, PP was highest mechanical properties with a tensile strength of 62.96 MPa and a tensile modulus of 1367.4 MPa. In addition, the microstructures were confirmed to be the reason for the decrease and increase of mechanical properties.

Selecting Green Supply Chain Management for Community Bamboo Growers Enterprise Using the Technique for Order Preference by Similarity to Ideal Solution

Tue, 31 Dec 2024 00:00:00 +0700

Decision-making process for selecting green supply chain management for community bamboo growers’ enterprises. Choosing green supply chain management for community bamboo growers' enterprises is a complex problem that requires careful consideration of multiple factors. Therefore, this research presents Delphi technique and TOPSIS to assess and priorities the selection of green supply chain management. that reduces the impact on the environment. First, Delphi technique was applied to select green supply chain management of 21 factors. The results of Delphi technique priority selection were selected for 13 factors. The second step was analyses by TOPSIS technique. Scaling decision-making matrices Then, weighted scaled decision-making metrics were analyses using the data of factor weights from the Delphi-reduced green supply chain management. The results were then used to calculate the positive ideal solution (PIS) and negative ideal solution (NIS) values to calculate the positive ideal exclusion measure (S*) and the exclusion measure value in the negative ideal (S') as well as the relative closeness (C*) for each green supply chain management, respectively. It was discovered that the best option was A4 (IEM7) Environmental Management Systems exist. A7 (CC1) Cooperation with customers for eco design, A1 (IEM1) Commitment of GSCM from senior managers, and A3 (IEM4) Total quality environmental management, respectively.

Design and develop Jig fixtures for parts of plastic injection machine to reduce working time

Tue, 31 Dec 2024 00:00:00 +0700

This research aims to design and develop jigs for parts of plastic injection machine to reduce working time from 54.22 minutes to less than 20 minutes. The researcher used analytical techniques: Failure Mode and Effect Analysis (FMEA) in the process and clamping of workpieces process. The process of identifying the problem, studying the problem, and finding the cause of the problem. To reduce the chance of defects from 7 causes of problems, it was found that the risk level in the workpiece clamping process can be reduced. Before the improvement, there was a risk score (RPN) of 624 points, reduced to 305 points. which represents a percentage that can be reduced by 51.12 % from the defects of the workpiece clamping process. And after develop jigs was found that the average working time of workpiece clamping process was 18 minutes, with a standard deviation was 1.936 minutes, which was able to reduce the time by 36 minutes, representing 66.66 %, and reducing costs by 4,345 baht, representing 9.07 percent.

The Improving and Defect Prevention in Production Process of Car Window Trim Seal Parts Case study: Company for Plastic Components

Tue, 31 Dec 2024 00:00:00 +0700

The case study company is a manufacturer of plastic parts in the automotive and electrical industries. From the study, it was found that the product with the IG43-0 number, which is the car window trim seal, had the highest number of defects. The most common type of defect found was the "injection marks" on the surface of the workpiece, with a total of 2,089 pieces. This caused the proportion of defects to increase to almost reach the threshold values. From studying the production process and analyzing the cause of the problem using the 7 Quality Control Tools and the Why-Why Analysis, it was found that the cause of the problem was a blockage in the air vent system of the injection mold. Therefore, corrective actions were taken by making a work instruction manual for preparing the injection mold, which specifies that it must be cleaned before using in production and the air vent system must be washed and checked the distance between the air vent grooves to ensure compliance with the specified standard. The results showed a reduction in defects by 1,171 pieces or 56.06% of the defects were reduced.

Design of Sandblasting Machine to Reduce Waste in the Production of Motorcycle Exhaust Muffler

Waraporn Klinbun, Rattatummanoon Yadseang, Nathi Suchaisong, Jirapol Klinbun — Tue, 31 Dec 2024 00:00:00 +0700

The objective of this research was to design a sandblasting machine for motorcycle exhaust mufflers because of studying the working process in the motorcycle exhaust production process in the factory case study. The waste was found from 1) the employees spent time covering the exhaust muffler for 13 percent of the total time. 2) The cost of the plastic bags used to cover the exhaust muffler was 3.29 baht per piece, and 3) the unnecessary motion was identified. The researcher analyzed the cause with a Why-Why analysis and improved the production process by using ECRS principle. The researcher then used the SolidWorks program 2021 to design the sandblasting machine and enumerated the components of the machine. From the result of the research, a prototype sandblasting machine for motorcycle exhaust mufflers was obtained that solved the problems. The sandblasting system and the mechanical rotation system were key components of the sandblasting design. This prototype can reduce the amount of time to 70 s, reduce the number of employees to 2 people, and reduce costs by 7,890 baht/month.

The Study of Volatile Organic Compounds of the Composites Fabricated from Used-Beverage Cartons Containing Aluminum and Additional Plastics

Tue, 31 Dec 2024 00:00:00 +0700

This article presents study results of Volatile Organic Compounds (VOCs) of composites fabricated by hot compression molding process. The research aimed to analyze volatile substances from recycled materials that were hazardous to health when developed as panel materials. The hypothesis assumed these composite materials emit harmful gases when recycling. Sampling sheets were derived from ground-used beverage cartons and recycled plastics mixed at 80:20, 70:30, 60:40, and 50:50 wt% and then analyzed for VOCs regarding ISO 16000. The results showed that no VOCs were detected after recycling. The samples can be processed for indoor-used products further.

Design and Development of a Knock-Down Hot Air Drying

Tue, 31 Dec 2024 00:00:00 +0700

This research aims to design and create a detachable hot air oven suitable for drying vegetables, fruits, and agricultural products, considering ease of use and mobility. The operational system of the detachable hot air oven uses a heating device with a control system to adjust the internal temperature of the oven and sensors to measure the temperature. Additionally, it controls the rotation of the fan to help distribute heat to the materials, which helps reduce moisture levels. The hot air oven is widely used in community enterprises or small-scale industries that are involved in the production of food products and various household items. In the market, these ovens are heavy and expensive. Therefore, the researchers developed a detachable hot air oven to address these limitations, which is lightweight, simple to move, and can operate continuously for no less than 4–8 hours, with a maximum temperature setting of up to 120 degrees Celsius. The principle of hot air operation is that the fan draws heat generated by the heater at the bottom of the device upwards to evenly distribute heat throughout the material. The drying time depends on the shape and type of the raw materials, averaging about 2–3 hours. The development of this detachable hot air oven allows for adjustable distances between the drying trays as needed. Testing the drying efficiency found that the heat inside the oven is consistent, with a temperature control system according to user requirements. It is easy to use and meets the diverse needs of the agricultural sector.