1_VLNHUA _TRUNG_EN

HCMC UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING MOLD DESIGN MANUFACTURING TEACHER: TRẦN MINH THẾ UYÊN STUDENT: TRẦN VĂN TRUNG the concept of natural and artificial NATURE Well known natural or nature, the material world, the universe and the natural world, is all matter and energy mainly in the form nature "Nature" refers to the phenomena occurring in the physical world, and also recalled to life Examples: air, land, water, flora, sunlight the concept of natural and artificial 2.ARTIFICIAL Is the human factor creates in the labor process VD: cars, planes, houses, offices, urban areas, artificial park Plastic Materials Plastic and rubber distinction Source Features of thermosetting resins and thermoplastic Application Additives used in injection molding technology The viscosity of the resin, the relationship between temperature pressure volume The size distribution of some plastics 1) The origins of plastic Oil, the main raw material for the production of plastic 2) The origin of rubber Rubber made from the latex of rubber trees 3) Application 4) Thermosetting plastic ● Fixed shape, it can not blanket the 2nd heat ● High degree of cross-linking chemical hardened So when the reaction can not occur in contrast, by the fixed structure of the polymer, if heated 2nd it will be destroyed rather than melting ● Hardness and brittle 5) Thermoplastic ● Available in many forms: grain, powder ● Maybe when heated blanket (several hundred degrees) It will harden when cooled to room temperature in the silo Often contain or transported pneumatically ● The long chain polymer will melt when heated ● Can repeat the process, but if the temperature is too high will reduce the quality of materials 6) Additives used in injection molding technology ● P-Clear 21 ● Increase in quality ● Hardware Accelerators ● Anti-ultraviolet (UV) ● Anti-aging ● Processing auxiliaries ● Toughness improvers ● Porous substance ● Dispersion auxiliaries 9) Distinguish a NO PLASTIC MATERIAL METHODOLOGY ● Discrimination based on natural colors, the transparency of the sample ● Use a hydrostatic balance method to compare the density ● Choosing a solution to dissolve soluble substances without the other ● Use for comparison Rontghen diffraction (crystal peak PA, and PS is an amorphous material) ● Compare the thermal properties (glass transition temperature of the PA and PS are turned 50 and 1000C) ● Feature Comparison based on mechanical properties 9) Distinguish a NO PLASTIC MATERIAL PE ( Polyethylene) PE is one of organic compounds (polymers) include CH2CH2 ethylene groups linked together by the Hydrono PE is prepared by polymerization of ethylene monomers (C2H4) 9) Distinguish a NO PLASTIC MATERIAL PP ( Polypropylen) As a thermoplastic resin (polymer) obtained from propylene polymerization 9) Distinguish a NO PLASTIC MATERIAL PVC ( Polyvinylchloride) Polyvinyl Chloride is also referred to as first PVC thermoplastic resins (polymers) and be prepared from polymerization vinylclorua 9) Distinguish a NO PLASTIC MATERIAL PET(Polyethylene terephthalate) Polyethylene terephthalate (called PET, PETE or PET or PETP-P) as well as thermoplastics, which are used in polyester resins and synthetic fibers 9) Distinguish a NO PLASTIC MATERIAL 6. PS (polystyren) Is one loại nhựa nhiệt dẻo (polymer) tên gọi is Polystyren (gọi tắt is PS), be created thành từ phản ứng trùng hợp Styren Công thức cấu tạo of Polystyren is (CH [C6H5] -CH2) n 10) SOME PLASTIC MATERIAL symbols 10) SOME PLASTIC MATERIAL symbols Number means that PET (polyethylene terephthalate) 10) SOME PLASTIC MATERIAL symbols Number means of HDPE - high density polyethylene 10) SOME PLASTIC MATERIAL symbols Number is PVC - PVC 10) SOME PLASTIC MATERIAL symbols Number is LDPE - low density polyethylene