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.

Quality Control Methods of Al2O3 Based Ceramic Injection Molding Raw Materials

2015 ◽  
Vol 812 ◽  
pp. 35-40
Author(s):  
Ádám Egész ◽  
László A. Gömze
Keyword(s):  
Injection Molding ◽  
High Purity ◽  
Raw Materials ◽  
Chemical Properties ◽  
Raw Material ◽  
Injection Molding Process ◽  
Alumina Powder ◽  
Molding Process ◽  
Thermal Methods ◽  
Ceramic Injection Molding

In the illuminant industry, for producing arc tube parts for high intensity discharge lamps the applied method is the ceramic injection molding. The ceramic arc tube parts are made of high purity alumina powder. By producing ceramic parts, one of the most critical step is to optimizing the injection molding process, [1] but first of all we need to know the properties of injection molding raw material, because later the molding process will be optimized for this material, to decrease the amount of cracked ceramics.For producing ceramic arc tube parts (plugs), there are used two different major components for producing injection molding raw material (feedstock): high purity alumina powder as the main component, and an organic paraffin wax as a binder material. It is expressly important to know the material, physical and chemical properties of these components, since mainly these have affect on the homogenity of feedstock, and therefore on the quality of end product. [3]In this research, both of the main components and the moldable raw material was investigated by visual, physical, chemical and thermal methods. As most important and main statement, the researchers found that the dynamic viscosity of the injection molding raw material depends on the used mixer equipment and the applied deformation velocity.Applied analitycal methods were laser granulometry, differential thermal analysis, and rheological analysis.

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.

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.

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.

An Analysis of Interfacial Adhesion Between TPU/MWCNT Composites and ABS Substrate by Over Injection Molding

2016 ◽  
Author(s):  
Catalin Fetecau ◽  
Felicia Stan ◽  
Nicoleta Violeta Cristea ◽  
Laurentiu Ionut Sandu
Keyword(s):  
Carbon Nanotubes ◽  
Injection Molding ◽  
Flow Behavior ◽  
Thermoplastic Polyurethane ◽  
Acrylonitrile Butadiene Styrene ◽  
Injection Molding Process ◽  
Molding Process ◽  
Melt Temperature ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this work, the advantages of Thermoplastic Polyurethane (TPU) filled with multi-walled carbon nanotubes (MWCNTs) were combined with those of the over injection molding process in order to obtain two-component (2k) structures with very different but high mechanical and electrical properties. TPU/MWCNT composites with different MWCNTs wt.% were over-molded onto Acrylonitrile Butadiene Styrene (ABS) substrates, under different processing conditions, and the adhesion was assessed by T-peel tests at room temperature. Since adhesion is also related to flow behavior, the rheological properties were studied with a capillary rheometer at shear rates similar to those of the injection molding process (102∼104s−1). Experimental results indicated that the most effective way to control the adhesion between the ABS substrate and the over-molded TPU/MWCNT composite is to increase the melt temperature. The addition of carbon nanotubes improves adhesion in the vicinity of 0.5 wt.% MWCNTs.

Cellulose-Based Biodegradable Packaging Materials of Antimicrobial

2013 ◽  
Vol 811 ◽  
pp. 280-283
Author(s):  
Ju Wei Wang
Keyword(s):  
Raw Materials ◽  
Orthogonal Experiment ◽  
Sheet Material ◽  
Test Method ◽  
Raw Material ◽  
National Standard ◽  
Injection Molding Process ◽  
Packaging Materials ◽  
Film Material ◽  
Molding Process

In recent years, with the requirements of environmental protection of packaging materials improve, biodegradable antibacterial materials more and more attention to. This paper to can hair sex polystyrene as main raw materials, and by the synthesis of biodegradable bacteriostasis of study on the properties of packaging materials. The results shows that can hair sex polystyrene as the main raw material made by injection molding process thickness of 0.25 mm plate, and influence factors of sheet material performance, get the film material performance is the ideal process parameters. According to People's Republic of China national standard GB/T1040-92"plastic tensile properties test method" and GB/T20197-2006"degradable plastics the definition, classification, signs and degrade the performance requirements," as determined by the experimental method for testing. The orthogonal experiment results show that can hair sex polystyrene usage: 6 g; Microcrystalline cellulose usage: 0.2g; The antibacterial agent type: silver nanotio2 in the system performance and degrade the performance of the material mechanics and antibacterial good performance.

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