Improvement on the Technique for Production of Alkaline Battery Seal Ring

2012 ◽  
Vol 550-553 ◽  
pp. 464-467
Author(s):  
Jia Min Zhang ◽  
Yue Wen Li ◽  
Wen Qing Zhao
Keyword(s):  
Injection Molding ◽  
Processing Condition ◽  
Raw Material ◽  
Injection Molding Process ◽  
Seal Ring ◽  
Affecting Factors ◽  
Molding Process ◽  
Alkaline Batteries ◽  
Key Factor ◽  
Short Shot

Through studying technology of the seal ring production of alkaline storage battery, some products were often found to have defects, such as product short shot, yellow and transparence was not good. According to the to identify the causes of the defects, in order to find ways to solve these problems, production processes were reasonably optimized .Under the seal ring of the injection molding process, raw material preparation, injection molding and post-processing work pieces in three stages, combined with the affecting factors in producing the ring. From the key factor that choose and control of the processing condition of the molding material, molding equipment, injection molding process in the appropriate temperature, pressure, velocity and time conditions, to find performance parameters of producing high quality seal, giving countermeasures to defects emerged in the production of alkaline batteries seal ring.

Simulation of Ceramic Injection Molding for Zirconia Optical Ferrule

2007 ◽  
Vol 336-338 ◽  
pp. 997-1000 ◽  
Author(s):  
Mei Min Zhang ◽  
Bin Lin
Keyword(s):  
Injection Molding ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Ceramic Injection Molding ◽  
Rectangular Distribution ◽  
Simulation Results ◽  
Die Temperature ◽  
Ram Speed ◽  
Short Shot

Zirconia Ferrule is a key part for manufacturing fiber connectors. The ceramic injection molding (CIM) process of the optical ferrule was simulated with the commercial CAE software moldflow. In order to obtain the optimum results, the orthogonal method was introduced to discuss the influence of each parameter such as die temperature, melt temperature, ram speed and gate dimension with the two kinds of distribution layout system respectively. The simulation results show that the curved distribution runner system is more suitable than the rectangular distribution one in the optical ferrule molding. Moreover, the effect of gravity on the ceramic injection molding process was discussed for determining a more reasonable balanced runner system of the special designed two-plate mold with six die cavities. It was found that short shot occurred at the top of the die cavity while other five cavities were filled well in the original designed mold. And when the top die cavity’s round runner with section diameter of 4.0mm was increased to 4.17 mm, each cavity was balanced filled without short shot.

scholarly journals Effects of Injection Molding Process Conditions on Physical Properties of EPDM Using Design of Experiment Method

2018 ◽  
Vol 167 ◽  
pp. 02016 ◽  
Author(s):  
Young Shin Kim ◽  
Euy Sik Jeon ◽  
Eui Seob Hwang
Keyword(s):  
Injection Molding ◽  
Physical Properties ◽  
Raw Material ◽  
Injection Molding Process ◽  
Process Conditions ◽  
Process Variables ◽  
Molding Process ◽  
Test Pieces ◽  
Experiment Method ◽  
Major Factors

The process variables such as time and temperature during the EPDM-injection molding not only change the physical properties of the raw material but also affect the insertion and separations forces when a grommet product is molded and mounted on a car body. Using the design of experiments method, the major factors in the injection molding process were considered to analyze their effects on the physical properties of the obtained EPDM materials. Test pieces were prepared under different process conditions, tensile strength and elongation were measured, and their correlation was analyzed.

The Influences of Solid Loading and Molding Variables on Alumina Injection Molding

2007 ◽  
Vol 336-338 ◽  
pp. 1021-1024 ◽  
Author(s):  
Xiao Jun Liu ◽  
Zhong Zhou Yi ◽  
Kang Ming Huang ◽  
Zhi Peng Xie ◽  
Yong Huang
Keyword(s):  
Injection Molding ◽  
Fracture Strength ◽  
Injection Pressure ◽  
Solid Loading ◽  
Injection Molding Process ◽  
Alumina Powder ◽  
Green Body ◽  
Molding Process ◽  
Commercial Alumina ◽  
Key Factor

Two kinds of commercial alumina compacts made by injection molding with different solid loading are studied. Solid loading is the key factor for the injection molding process and the properties of green body and sintered compacts. The results show that higher solid loading leads to better properties of the compacts such as density and fracture strength, however the viscosity of the feedstock would increase. Smaller sized alumina powder leads to a higher critical solid loading value. Macroscopic defects such as voids and cracks could be introduced into the injection molding samples if the molding variables are not optimized. The properties of sample are improved by adjusting the variables such as injection pressure, holding pressure, holding time and barrel temperature.

scholarly journals ANALYSIS OF INJECTION MOLDING PROCESS TO REDUCED DEFECTS (SHORT-SHOT)

2020 ◽  
Vol 5 (6) ◽  
pp. 113-119
Author(s):  
L.D.Mahajan ◽  
P.N.Ulhe
Keyword(s):  
Injection Molding ◽  
Process Parameters ◽  
Injection Pressure ◽  
Quality Characteristic ◽  
Injection Molding Process ◽  
Molding Process ◽  
Plastic Specimen ◽  
Optimal Injection ◽  
Short Shot

This paper deals with optimal injection molding process parameters for minimum short shot. In this study, analyses of injection molding process parameters were carried out to reduced defects and minimize short shots. Optimal injection molding conditions for minimum short shot were determined by the DOE technique of Taguchi and the analysis of variance (ANOVA) methods. For this study CPVC plastic specimen was tested. Determination of the optimal Injection molding process parameters were based on S/N ratios. According to results mold closing speed had significant effect on quality characteristic. Mold pressure and Injection pressure had no significant effect

An Application of Computer Aided Engineering in Rubber Injection Mold With a Cold Runner System Design and Manufacturing

2007 ◽  
Author(s):  
Supasit Rodkwan ◽  
Rungtham Panyawipart ◽  
Chana Raksiri ◽  
Kunnayut Eiamsa-ard
Keyword(s):  
Injection Molding ◽  
Raw Material ◽  
Injection Molding Process ◽  
Molding Process ◽  
Actual System ◽  
Part Quality ◽  
Injection Process ◽  
Design And Manufacturing ◽  
Trial And Error Method ◽  
And Behavior

With a recent growth in the demand of the rubber products globally, the latest technology is adopted to improve the design and manufacturing of those rubber products in term of part quality and production lead time and cost. The cold runner system is one of the technologies which can assist in unfilling part problem and raw material saving. Nevertheless, with the lack of numerical tool with an ability to predict the behavior of rubber during the injection molding process, designers still need to use their experience and trial-and-error method to design the mold and the cold runner system. Therefore, in this research, the use of CAE and a cold runner system is applied to the design and manufacturing of rubber injection molding process with a gasket mold made of SBR as a case study. The empirical and simulated results agree well and the use of raw material in the actual system is decreased by 12% shot weight which can lead to the reduced cost of products. Finally, it can be seen that the use of CAE can assist the mold designers and manufacturers to get better understanding of flow pattern and behavior of rubber during the injection process so the better part quality can be obtained.

Study on Technology of Filter Made by Engineering Grade Thermoplastic Polyurethane

2011 ◽  
Vol 217-218 ◽  
pp. 746-751
Author(s):  
Jia Min Zhang
Keyword(s):  
Injection Molding ◽  
Raw Materials ◽  
Thermoplastic Polyurethane ◽  
Decomposition Temperature ◽  
Raw Material ◽  
Injection Molding Process ◽  
Polyurethane Elastomer ◽  
Molding Process ◽  
Thermoplastic Polyurethane Elastomer ◽  
Filter Housing

This paper introduced the different classifications and advantages of the project level thermoplastic polyurethane elastomer ,and according to the injection molding process of raw materials Isoplast 302EZ and thermoplastic polyurethane elastomer, from raw material preparation, injection machine selection, tooling selection, molding conditions, and introduced TPU injection molding process .The filter housing of TPU were briefly discussed from the design goals, technical characteristics, performance analysis. Combination of typical products, we studied the technology of the production of the thermoplastic polyurethane flexible filter housing. The results showed that the material should be pre-dried in a vacuum, and the time, temperature and pressure should be controlled properly. It should be pay attention that the specification of the waste and the raw materials should be the same, when recycling and on the other hand, the quality of the productions should be improved and no pollution should be ensure during the process; to avoid the decomposition temperature and the products aging, we should empty the material or stop the machine during it doesn’t work.

A Plastic Injection Molding Process Characterization Using Experimental Design Technique: A Case Study

2012 ◽  
Author(s):  
Shaik Mohamed Mohamed Yusoff ◽  
Jafri Mohd. Rohani ◽  
Wan Harun Wan Hamid ◽  
Edly Ramly
Keyword(s):  
Regression Analysis ◽  
Injection Molding ◽  
Process Parameters ◽  
Rotation Speed ◽  
Plastic Injection Molding ◽  
Injection Molding Process ◽  
Molding Process ◽  
Significant Process ◽  
Short Shot ◽  
Plastic Injection

Kertas kerja ini mengillustrasikan applikasi reka bentuk eksperimen dalam industri pemprosesan suntikan plastik untuk salah satu komponen penyaman udara. Objektif utama reka bentuk eksperimen ini ialah untuk mengenal pasti parameter mesin suntikan plastik dan seterusnya menentukan paras optima mesin yang mempengaruhi karekteristik output, iaitu short–shot. Reka bentuk factorial penuh telah dipilih untuk kajian ini dengan mengenal pasti lima mesin parameter, iaitu backpressure, screw rotation speed, spear temperature, monifold temperature, dan holding pressure transfer. Keputusan kajian telah dapat mengenal pasti mesin parameter yang mempengaruhi karekteristik output dan mesin parameter signifikasi tersebut telah dianalisa melalui model regrasi. Kata kunci: Reka bentuk eksperimen, mesin suntikan plastik, analisa varian, analisa regrasi This paper illustrates an application of design of experimental (DOE) approach in an industrial setting for identifying the critical factors affecting a plastic injection molding process of a certain component for aircond assembly. A critical to quality (CTQ) of interest is reducing process defects, namely short–shot. A full factorial design was employed to study simultaneously the effect of five injection molding process parameters. The five process parameters are backpressure, screw rotation speed, spear temperature, manifold temperature, and holding pressure transfer. Finally, the significant process parameters influencing the short–shot defect have been found. Empirical relationship between CTQ and the significant process parameters were formulated using regression analysis. Key words: Design of experiments, injection molding, analysis of variance (ANOVA), regression analysis

Development of Dental Scaler Tip Mold with Powder Injection Molding Process

2007 ◽  
Vol 534-536 ◽  
pp. 345-348
Author(s):  
Chul Jin Hwang ◽  
Y.B. Ko ◽  
Hyung Pil Park ◽  
S.T. Chung ◽  
Byung Ohk Rhee
Keyword(s):  
Injection Molding ◽  
Powder Injection Molding ◽  
Machining Process ◽  
Powder Injection ◽  
Injection Molding Process ◽  
Molding Process ◽  
3D Geometry ◽  
Automotive Parts ◽  
Short Shot ◽  
Net Shaping

With the capability of net shaping for complex 3D geometry, powder injection molding (PIM) is widely used for automotive parts, electronics and medical industry. In this study, an ultrasonic dental scaler tip produced by machining process was redesigned for the PIM process. An injection mold was designed and machined to produce the dental scaler tip by the PIM process. The mold design was aided by CAE analysis. A PIM feedstock was made of SUS316L powder and a wax based binder. The filling balance in the mold was checked by a short shot test with LDPE and the PIM feedstock. Production capability of the PIM process for the dental scaler tip was examined with the mold. Although there were minor problems such as a discoloration around the gate and a flashing at the air vent, the PIM process turned out to be an excellent substitute for machining process to manufacture the ultrasonic dental scaler tip.

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