scholarly journals Effects of Different Mold Materials and Coolant Media on the Cooling Performance of Epoxy-Based Injection Molds

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 280
Author(s):  
Chil-Chyuan Kuo ◽  
Jing-Yan Xu ◽  
Yi-Jun Zhu ◽  
Chong-Hao Lee
Keyword(s):  
Production Cost ◽  
Cooling Water ◽  
Cooling Time ◽  
Time Range ◽  
Mold Material ◽  
Injection Mold ◽  
Total Production ◽  
Cooling Efficiency ◽  
Cooling Performance ◽  
Injection Molded

Metal additive manufacturing techniques are frequently applied to the manufacturing of injection molds with a conformal cooling channel (CCC) in order to shorten the cooling time in the injection molding process. Reducing the cooling time in the cooling stage is essential to reducing the energy consumption in mass production. However, the distinct disadvantages include higher manufacturing costs and longer processing time in the fabrication of injection mold with CCC. Rapid tooling technology (RTT) is a widely utilized technology to shorten mold development time in the mold industry. In principle, the cooling time of injection molded products is affected by both injection mold material and coolant medium. However, little work has been carried out to investigate the effects of different mold materials and coolant media on the cooling performance of epoxy-based injection molds quantitatively. In this study, the effects of four different coolant media on the cooling performance of ten sets of injection molds fabricated with different mixtures were investigated experimentally. It was found that cooling water with ultrafine bubble is the best cooling medium based on the cooling efficiency of the injection molded parts (since the cooling efficiency is increased further by about 12.4% compared to the conventional cooling water). Mold material has a greater influence on the cooling efficiency than the cooling medium, since cooling time range of different mold materials is 99 s while the cooling time range for different cooling media is 92 s. Based on the total production cost of injection mold and cooling efficiency, the epoxy resin filled with 41 vol.% aluminum powder is the optimal formula for making an injection mold since saving in the total production cost about 24% is obtained compared to injection mold made with commercially available materials.

Influence of Technological Parameters on Surface Quality of Injection-Molded Parts

2016 ◽  
Vol 686 ◽  
pp. 131-136 ◽  
Author(s):  
Jiří Čop ◽  
Vladimír Pata ◽  
Ondřej Bílek
Keyword(s):  
Surface Quality ◽  
Tool Material ◽  
Injection Mold ◽  
Total Production ◽  
Technological Parameters ◽  
Production Time ◽  
Molded Parts ◽  
Injection Molded ◽  
Fine Turning

In the most cases manufacturing of injection mold and its cavities comprise more than half of the total production time. Very fine finishing operations can increase production time and cost of injection mold. Appropriate choice of finishing operations and injection technological parameters can reduce price of injection mold production, shorten production time and thus lower price of small and thin injection molded parts. Tool material X38CrMoV5-1, used for cavity in injection mold, was finished by fine turning, grinding, lapping and polishing with different technological conditions to achieve various surface roughness. The main aim of this research is to find an influence of surface quality of cavity and injection technological parameters on the surface quality of injection molded parts.

Immaterial Cost and Production: Maximum Production Cost Level Through Marginal Approach

2020 ◽  
Vol 8 (2) ◽  
pp. 128-149
Author(s):  
Dini Maulana Lestari
Keyword(s):  
Quantitative Study ◽  
Marginal Cost ◽  
Production Cost ◽  
Maximum Level ◽  
Production Costs ◽  
Total Production ◽  
Sugar Factory ◽  
Maximum Production ◽  
Cost Approach ◽  
South Sulawesi

This paper will discuss about the immaterial costs and production yields at one of the refined sugar factory companies in Makassar, South Sulawesi. The theory is based on the fact that Immaterial is a cost that is almsgiving, meaning costs that are outside of the basic costs of the company in producing production, so this research aims to find out: (1) what is the production cost needed to produce this production, (2) the maximum level of production at company from 2013 to 2017. This type of research is a quantitative study because it uses a questionnaire in the form of values ​​that are processed using the marginal cost approach formula. The results of the analysis show that (1) the maximum level of production costs occurred in 2016 amounting to 6,912 with an Immaterial cost of Rp. 2,481,796,800 and the total production produced is 359,077.3 tons (2) The required workforce with the total production produced is 359,077.3 tones of 180 people including the maximum production point which means that the lowest value is achieved (optimal).    

MINIMALISASI BIAYA SIMPAN DAN BIAYA SETUP PADA MULTIPLE PRODUK: SIMULASI DENGAN CAPACITATED LOT SIZING PROBLEM

2019 ◽  
Vol 4 (2) ◽  
pp. 205-214
Author(s):  
Erika Fatma
Keyword(s):  
Production Cost ◽  
Lot Sizing ◽  
Setup Time ◽  
Production Costs ◽  
Total Production ◽  
Product Cycle ◽  
Lot Size ◽  
Setup Costs ◽  
Lot Sizing Problem ◽  
Capacitated Lot Sizing

Lot sizing problem in production planning aims to optimize production costs (processing, setup and holding cost) by fulfilling demand and resources capacity costraint. The Capacitated Lot sizing Problem (CLSP) model aims to balance the setup costs and inventory costs to obtain optimal total costs. The object of this study was a plastic component manufacturing company. This study use CLSP model, considering process costs, holding costs and setup costs, by calculating product cycle and setup time. The constraint of this model is the production time capacity and the storage capacity of the finished product. CLSP can reduce the total production cost by 4.05% and can reduce setup time by 46.75%.  Keyword: Lot size, CLSP, Total production cost.

scholarly journals Improving Cooling Performance of Injection Molding Tool with Conformal Cooling Channel by Adding Hybrid Fillers

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1224
Author(s):  
Chil-Chyuan Kuo ◽  
Wei-Hua Chen
Keyword(s):  
Thermal Conductivity ◽  
Injection Molding ◽  
Cooling Time ◽  
Performance Ratio ◽  
Cooling Efficiency ◽  
Cooling Channel ◽  
Conformal Cooling Channel ◽  
Conformal Cooling ◽  
Fused Deposition ◽  
Silicone Rubber Mold

Silicone rubber mold (SRM) is capable of reducing the cost and time in a new product development phase and has many applications for the pilot runs. Unfortunately, the SRM after injection molding has a poor cooling efficiency due to its low thermal conductivity. To improve the cooling efficiency, the thermal conductivity of the SRM was improved by adding fillers into the SRM. An optimal recipe for fabricating a high cooling efficiency low-pressure injection mold with conformal cooling channel fabricated by fused deposition modeling technology was proposed and implemented. This study proposes a recipe combining 52.6 wt.% aluminum powder, 5.3 wt.% graphite powder, and 42.1 wt.% liquid silicon rubber can be used to make SRM with excellent cooling efficiency. The price–performance ratio of this SRM made by the proposed recipe is around 55. The thermal conductivity of the SRM made by the proposed recipe can be increased by up to 77.6% compared with convention SRM. In addition, the actual cooling time of the injection molded product can be shortened up to 69.1% compared with the conventional SRM. The actual cooling time obtained by the experiment is in good agreement with the simulation results with the relative error rate about 20%.

scholarly journals Post-Processing Time Dependence of Shrinkage and Mechanical Properties of Injection-Molded Polypropylene

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 22
Author(s):  
Artur Kościuszko ◽  
Dawid Marciniak ◽  
Dariusz Sykutera
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Injection Molding ◽  
Accelerated Aging ◽  
Mold Temperature ◽  
Degree Of Crystallinity ◽  
Injection Mold ◽  
Secondary Crystallization ◽  
Scanning Calorimetry ◽  
Injection Molded

Dimensions of the injection-molded semi-crystalline materials (polymeric products) decrease with the time that elapses from their formation. The post-molding shrinkage is an effect of secondary crystallization; the increase in the degree of polymer crystallinity leads to an increase in stiffness and decrease in impact strength of the polymer material. The aim of this study was to assess the changes in the values of post-molding shrinkage of polypropylene produced by injection molding at two different temperatures of the mold (20 °C and 80 °C), and conditioned for 504 h at 23 °C. Subsequently, the samples were annealed for 24 h at 140 °C in order to conduct their accelerated aging. The results of shrinkage tests were related to the changes of mechanical properties that accompany the secondary crystallization. The degree of crystallinity of the conditioned samples was determined by means of density measurements and differential scanning calorimetry. It was found that the changes in the length of the moldings that took place after removal from the injection mold were accompanied by an increase of 20% in the modulus of elasticity, regardless of the conditions under which the samples were made. The differences in the shrinkage and mechanical properties of the samples resulting from mold temperature, as determined by tensile test, were removed by annealing. However, the samples made at two different injection mold temperature values still significantly differed in impact strength, the values of which were clearly higher for the annealed samples compared to the results determined for the samples immediately after the injection molding.

scholarly journals Economic viability of the piauçu Leporinus macrocephalus (Garavello & Britski, 1988) production

2004 ◽  
Vol 61 (2) ◽  
pp. 228-233 ◽  
Author(s):  
Leonardo Susumu Takahashi ◽  
Flavio Daolio Gonçalves ◽  
Janessa Sampaio de Abreu ◽  
Maria Inez Espagnoli Geraldo Martins ◽  
Antonio Carlos Manduca Ferreira
Keyword(s):  
Production Cost ◽  
Economic Valuation ◽  
Relative Magnitude ◽  
Productive Efficiency ◽  
Economic Viability ◽  
Selling Price ◽  
Total Production ◽  
Fish Production ◽  
Present Value ◽  
Fish Farms

Brazilian fish farms presented an accelerated development during the early 90's, mainly because of the increase in fee-fishing operations. To meet the demand of this market, fish production and supply became excessive and, as a consequence, the number of fee-fishing operations, farmers and the final selling price, decreased. This study analyzes the technical aspects, production cost, profitability and economic viability of the production of piauçu (L. macrocephalus) in ponds, based on information from a rural property. Feeding and fingerling costs amount to approximately 47.1% of the total production cost, representing together with the final selling price the most important factor affecting profitability. The payback period was 8.3 years, the liquid present value US$ 291.07, the internal return margin 9%, and the income-outcome ratio was 1.01, which represents an unattractive investment as a projection based on current conditions. The improvement in productive efficiency enhances the economic valuation index, and that the relative magnitude of cost and income are the most important points for the economic viability of the studied farm.

scholarly journals Analisis Penentuan Beban Pokok Produksi Pada Usaha Tempe Sumber Mas Jember

2018 ◽  
Vol 5 (2) ◽  
pp. 134
Author(s):  
Luqman Arif Baihaqi ◽  
Imam Mas'ud ◽  
Yosefa Sayekti
Keyword(s):  
Control System ◽  
Production Process ◽  
Production Cost ◽  
Cost Control ◽  
Total Production ◽  
Cost Of Production ◽  
The Cost ◽  
Business Cost

This study aims to find out the system of business cost control of Tempe Sumber Mas. A Controling based difference between the calculation of the cost of production with cost of production of tempe using full costing. and This research uses Descriptive by Source and Technique Triangulation. The results of this study indicate that the cost control system used by the company is still simple and the calculation of the cost of production of tempe using full costing method is greater than calculate the total production cost used in the tempe production process. Keywords: Expense, Cost of Production, Full Costing, Cost Control

scholarly journals ANALISIS KEUNTUNGAN DAN TITIK IMPAS TERNAK AYAM KAMPUNG SUPER DAN AYAM BROILER DI DESA BANGUN HARJO BUAY MADANG TIMUR OKU TIMUR

2017 ◽  
Vol 2 (03) ◽  
pp. 23-31
Author(s):  
Imam Sulaiman
Keyword(s):  
Production Process ◽  
Production Cost ◽  
Production Volume ◽  
Total Production ◽  
Majority Population ◽  
Research Plan ◽  
Average Revenue ◽  
Break Even Point ◽  
The Cost ◽  
The Village

The objectives of this research are to: (1) To analyze the cost, income and income of chicken and chicken cattle in Bangu Harjo Village, Buay Madang Timur District, OKU Timur Regency, (2) To analyze whether broiler and joper cattle cultivated in Bangun Harjo Village, Buay Madang Timur Sub-district, OKU Timur Regency is beneficial, (3) To analyze break even point of broiler and joper livestock business in Bangun Harjo Village, Buay Madang Timur District, OKU Timur Regency. This research has been conducted in Bangun Harjo Village, Buay Madang Timur District, East OKU Regency. Site selection is done purposively with the consideration that in the village is able to represent from the existing population and have the criteria of research plan. Bangun Harjo village is a village whose majority population live as farmers and there are some farmers who seek the cultivation of super chicken (joper) and broiler (broiler). The study was conducted in June 2015. The study found that the total production cost incurred in the poultry livestock business in Bangun Harjo Village in one production process amounted to Rp 13,963,744, the average revenue was Rp 22,920,000 so that income Received amounted to Rp 8,956,256. The value of R / C ratio is 1.64 indicating that the chicken livestock business is profitable. The total production cost incurred in the broiler business in Bangun Harjo Village in one production process is Rp 30,609,006, the average revenue is Rp 54,676,250, so the income received is Rp 24,067,224. The value of R / C ratio is 1.79 indicates that the business of broiler livestock is profitable and BEP value of livestock production volume of chicken joper is 349 head, while the value of BEP price is Rp 24.569 / Tail and BEP value of broiler chicken production volume is equal to 2.017 Kg, while the BEP value of the price is Rp 8,496 / Kg which shows that the business of chicken and broiler cattle in Bangun Harjo Village is feasible financially.

ANALISIS HOME INDUSTRI PEMBUATAN KERUPUK OPAK DI DESA JAYA BAKTI KECAMATAN MADANG SUKU I KABUPATEN OKU TIMUR

2019 ◽  
Vol 5 (01) ◽  
pp. 1-9
Author(s):  
Agoes Thony
Keyword(s):  
Production Cost ◽  
Added Value ◽  
Variable Cost ◽  
Fixed Cost ◽  
Total Production ◽  
The Sun ◽  
Labor Costs ◽  
Family Labor ◽  
One Year ◽  
Break Even Point

The objectives of this study were to: 1) determine the technique of making opak crackers in Jaya Bakti Village, Madang Suku I District, East OKU Regency, 2) determine the income and break-even point of the home industry for making opak crackers in Jaya Bakti Village, Madang Suku I District, East OKU Regency , 3) knowing the added value of the home industry for making opak crackers in Jaya Bakti Village, Madang Suku I District, East OKU Regency, 4) knowing whether the home industry for making opak crackers in Jaya Bakti Village, Madang Suku I District, East OKU Regency is profitable and feasible to develop. The results showed that: 1) the technique of making opaque crackers is quite easy, namely by grated cassava, seasoned (garlic, coriander and salt), then molded and steamed for ± 2 minutes for one steaming opaque cracker, then dried in the sun for ± 2 days, after the raw dry opaque crackers are packaged and then marketed. So, the process of making opak crackers takes ± 5 days, 2) the revenue obtained from the home industry for making opak crackers is IDR 735,000 / PP, with a production cost of IDR 501,362 / PP, with a fixed cost of IDR. 69,444, - / PP and a variable cost of 428,000, - / PP, then the income is Rp. 233,638 .- / PP or Rp. 1,401,828 .- / month, 3) the added value in making opak crackers is Rp. 333,638, - / PP obtained from revenue less intermediate costs. The intermediate cost is obtained from the total production cost, namely Rp. 501,362, - / PP minus family labor costs of Rp. 100,000, - / PP so that the total intermediate cost is Rp. 401,362, - / PP, 4) the level of profit based on the acceptance of the value is more than 1, namely the R / C Ratio of 1.47 which means that the opaque cracker home industry is profitable. Meanwhile, based on the level of profit from income the value is more than the prevailing bank interest rate, namely B / C Ratio of 0.47, which means that the home industry for making opaque crackers is non feasible. The production BEP value is Rp. 53.27, - / kg / PP, the BEP value of Rp. 559,361, - / PP, and the BEP value is Rp. Rp. 4.386, - / kg / PP, so this business can be said to be functionally feasible. In addition, the total assets invested in the home industry during the year or the ROI value resulted in a profit of 0.38%, meaning that for the home industry, opaque cracker making for one year generated a profit of 0.38%.

ANALISIS POLA PEMANFAATAAN LAHAN TEGALAN MENANAM SAYURAN DI DESA TAMBAK BOYO, KEC. BUAY MADANG TIMUR, OKU TIMUR

2017 ◽  
Vol 3 (01) ◽  
pp. 7-11
Author(s):  
Muridin
Keyword(s):  
Production Cost ◽  
Value Added ◽  
Added Value ◽  
Selling Price ◽  
Total Production ◽  
Rice Milling

The objectives of this research are: 1) To know the production cost and income of paddy mill business in Buay Bahuga Sub-district of Way Kanan Regency, 2) To know the value added of rice mill business in Buay Bahuga Sub-district of Way Kanan Regency, 3) To know the feasibility of rice milling business in the District of Buay Bahuga District Way Kanan. The results showed that the total production of rice milling business that is equal to 75.096 kg / year with the selling price of Rp 7,700 / kg, the revenue of Rp 578,239,200 is obtained, the use of production cost of Rp 800.006.105, the income of Rp -221.766.905 . Added value to the paddy mill business in Buay Bahuga District is Rp 578,239,200. with the use of the intermediate fee of Rp 382,505,680. The rice milling business in Kecamatan Buay is also feasible to be developed financially.

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