• Title/Summary/Keyword: Cure Cycle

Search Result 42, Processing Time 0.019 seconds

Effect of Binder's Concentration and Fiber Type on Mechanical Properties of Fragrant Fabrics (마이크로캡슐을 이용한 방향가공시 바인더 농도 및 섬유 종류에 따른 물성)

  • 김혜림;송화순
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.28 no.7
    • /
    • pp.1029-1036
    • /
    • 2004
  • The fragrant fabrics were prepared by treatment with eucalyptus microcapsules. 100% cotton fabric, 100% polyester fabric and 100% wool fabric were used as test specimens. Using pad-dry-cure method, microcapsules were attached on each specimen by acrylic binder under conditions of varying concentration. Surface property, stiffness, and air permeability of fragrant fabrics were evaluated. As increasing concentration of binder, add-on yield was increased. Add-on yield was decreased with increasing laundering cycle, especially in polyester fabric. As the concentration of binder was increased, the properties of stiffness and air permeability were decreased. Also it fumed out that pad-dry-cure method was not suitable to polyester fabric.

실험계획법을 이용한 탄소섬유/페놀수지의 강화 cycle연구

  • Ha, Heon-Seung;Lee, Jin-Yong;Jo, Dong-Hwan;Yun, Byeong-Il
    • Korean Journal of Materials Research
    • /
    • v.3 no.5
    • /
    • pp.514-520
    • /
    • 1993
  • In this paper the cure cycle of carbon fiber/phenolic resin was investigated by the Taguchi Method in an experimental design. Experiments were systematically performed using $L_{18}(2^1 \times 3_7)$ orthorgonal array table of the experimental design. In the experimental design, eight compression molding parameters (heating rate, pressing temperature, pressing rate, molding pressure, curing temperature, dwell time at curing temperature, cooling rate and degassing) were considered and the effects of the parameters on the flexural strength and the apparent porosity of carbon fiber/phenolic composites were investigated. The analysis of variance for the experimental results indicated that molding pressure and curing temperature are the most significant parmeters in the flexural strength and the apparent porosity of carbon fiber/phenolic resin composites, respectively.

  • PDF

A Study on the Plain Grinding Characteristics of Carbon Fiber Epoxy Composite with the GC Grinding Wheel (GC 연삭숫돌을 이용한 탄소섬유 에폭시 복합재료의 평면 연삭특성에 관한 연구)

  • 한흥삼
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.9 no.4
    • /
    • pp.34-47
    • /
    • 2000
  • Since carbon fiber epoxy composite materials have excellent properties for structures due to their high specific strength, high specific modulus, high damping and low thermal expansion, the hollow shafts made of carbon fiber epoxy composites have been widely used for power transmission shafts for motor vehicles , spindles of machine tools, motor base, bearing mount for tool up and manufacturing. The molded composite machine elements are not usually accurate enough for mechanical machine elements, which require turning drilling , cutting and grinding. The experiment are surface grinding wheel GC60 to the carbon fiber epoxy composite specimen with respect to staking angle [0]nT , [45]nT, [90]nT on the CNC grinding machine. In this paper, the surface grinding characteristics of composite plate, which are surveyed experimentally and analytically with respect to the grinding force, surface roughness and wheel loading according to the variable depth of cut, wheel velocity and table feed rate are investigated.

  • PDF

A study on the processing of phenolic composite reinforced with hybrid of PAN based/Rayon based carbon fabrics using FBG sensor system (FBG 센서를 이용한 PAN계/Rayon계 탄소 직물 하이브리드 복합재료의 성형 공정 연구)

  • Kim Jae Hong;Park Jong Kyu;Kang Tae Jin
    • Proceedings of the Korean Society For Composite Materials Conference
    • /
    • 2004.10a
    • /
    • pp.159-162
    • /
    • 2004
  • The processing of phenolic composite reinforced with hybrid of PAN based/Rayon based carbon fabrics using FBG sensor and thermocouple was studied. Once the composite is cured, the reflection spectrum from the FBG sensor shifted the center wavelength with an increase in the temperature. Also, the change in the form of the reflection spectrum obtained during the cooling process of the cure cycle was caused by the thermal shrinkage. During the curing process, uniform distribution of the temperature profile was observed throughout the sample.

  • PDF

Study on the Roughness Improvement using Parameter of Rapid Prototyping (쾌속조형 파라미터를 이용한 표면형상정밀도 향상에 관한 연구)

  • Park, Gae-Duck;Kim, Tae-Ho;Jeon, Eon-Chan
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.6 no.3
    • /
    • pp.77-84
    • /
    • 2007
  • As a life cycle of product bas shortend, Rapid prototypiug has come into the spotlight to shortened the time of producint a prototype. But It followed in laminated directivity and of the prototype production which is decided the interference which Beccuase of invisible rough surface, some inferences have occured during an assembly hour. Consequently, This study on rapid prototyping has parameter to determine surface roughness and surface form precision of total shape. In order to improve Surface form precision, it can control parameters which are Laminate Height, Layer Hatch Overcue, Fill Cure Depth. In addition, we found the parameter which have a deep effect on surface roughness among various parameters, and then, tried to reduce the interference that can be occurred by surface roughness during assembly.

  • PDF

A Technology Convergent Medical Service Engineering Model based on the Dynamic Innovation Theory (동태적 혁신이론 기반의 기술 융합 의료서비스 공학모델)

  • Kim, Jong-Ho
    • IE interfaces
    • /
    • v.21 no.2
    • /
    • pp.209-220
    • /
    • 2008
  • Recently, innovative medical services are fast emerging, which include customized medical services based on bio-informatics, composition of cure and well-being exploiting ubiquitous technology, hospital supply chain management using RFID, and so forth. However, conventional approaches for new service development hardly give us systematic model to analyze and produce creative medical services. Because most of them are static and concentrate on microscopic tools or techniques. Thus, it is highly desirable to suggest an integrative framework to organize the whole transformation process from technology to medical service. The objective of this study is to propose a medical service engineering model based on the dynamic innovation theory. The proposed model contains objectives of service system, strategies of hospital, stages, activities required to deal with medical service life cycle, which incorporates the acquisition of new technology, transformation to the product, penetration into market, and adoption of consumers. In addition, the usefulness and applicability of the newly proposed model are provided using catholic medical center example.

A Study on the Grinding Characteristics of the Carbon Fiber Epoxy Composite Materials with the Vitrified Bonded Wheel (탄소섬유 에폭시 복합재료 연삭숫돌 선정에 관한 연구)

  • 한흥삼
    • Composites Research
    • /
    • v.13 no.5
    • /
    • pp.44-49
    • /
    • 2000
  • Although the net-shape molding of composites is generally recommended, molded composites frequently requires cutting or grinding due to the dimensional inaccuracy for precision machine elements. The surface roughness and cutting force were also measured to investigate the surface grinding characteristics of the composites using the vitrified bonded wheel (WA, GC). The experiments were performed dry grinding conditions with respect to cutting speed, feed speed, depth of cut of the stacking sequence $[O]_{nT.}$ From the experimental investigation, the optimal conditions both the vitrified bonded wheel WA and GC for the surface grinding are suggested.

  • PDF

A Study on the Surface Grinding Temperature Characteristics of the Carbon Fiber Epoxy Composite Materials (탄소섬유 에폭시 복합재료의 평면 연삭온도 특성에 관한 연구)

  • 한흥삼
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.04a
    • /
    • pp.441-446
    • /
    • 2000
  • Although the net-shape molding of composites is generally recommended, molded composites frequently required cutting or grinding due to the dimensional inaccuracy for precision machine elements. During the composite machining operations such as cutting and grinding, the temperature at the grinding area may increase beyond the allowed limit due to the low thermal conductivity of composites, which might degrade the matrix of composite. Therefore, in this work, the temperature at the grinding point during surface grinding of carbon fiber epoxy composite was measured. The grinding temperature and surface roughness were also measured to investigate the surface grinding characteristics of the composited. The experiments were performed both under dry and wet grinding conditions with respect to cutting speed, feed speed, depth of cut and stacking angle. From the experimental investigation, the optimal conditions for the composite plain grinding were suggested.

  • PDF

A Study on the Grinding Characteristics of the Carbon Fiber Epoxy Composite Material Grinding Temperature (탄소섬유 에폭시 복합재료 연삭온도에 의한 연삭특성)

  • 한흥삼;이동주
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.9 no.6
    • /
    • pp.65-70
    • /
    • 2000
  • Although the net-shape molding of composites is generally recommended, molded composites frequently requires cutting or grinding due to the dimensional inaccuracy for precision machine elements. During the composite machining operations such as cutting and grinding, the temperature at the grinding area may increase beyond the allowed limit due to the low thermal conductivity of composites, which might degrade the matrix of composite. Therefore, in this work, the temperature at the grinding point during surface grinding of carbon fiber epoxy composite was measured. The grinding temperature and surface roughness were also measured to investigate the surface grinding characteristics of the composites. The experiments were performed both under dry and wet grinding conditions with respect to cutting speed, feed speed, depth of cut and stacking angle. From the experimental investigation, the optimal conditions for the composite surface grinding were suggested.

  • PDF

Communication with Psychosomatic Patient: With a Clinical Vignette "When Words Are Unspeakable: A Bridge Beyond the Silence" (증례 '금지된 언어와 침묵을 넘어서'를 통해 본 정신신체화 환자와의 소통)

  • Jahng, Eun Jin
    • Psychoanalysis
    • /
    • v.29 no.4
    • /
    • pp.72-82
    • /
    • 2018
  • What should a therapist do if the patient has lost the ability to speak in sessions? How should the therapist understand and approach this 'deadly silence'? Psychosomatic patients have poor ability to mentalize their experience, so they create a 'shunt' from emotional experience to body bypassing symbolic sphere. This makes psychosomatic patients vulnerable to expressing their emotions in words. With the case vignette 'When words are unspeakable: a bridge beyond the silence' written by Wirth in a book "From soma to symbol" we observe how psychosomatic pathology arises, from inappropriate mirroring and poor containment; and how this escalates into a vicious cycle of sin and punishment in the patient's conscience. This conscience scenario imprisons a talented and creative mind in a dark, silent place, wherein symbols and words are forbidden. This seemingly impossible task of providing silent patients with a 'talking cure' finds breakthrough with containment, and transformative thinking using therapists' reveries.