Sökning: "mould generation"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden mould generation.

  1. 1. The Late etruscan votive heads from Tessennano. A study of production, distribution and sociohistorical context

    Författare :Martin Söderlind; Antikens kultur och samhällsliv; []
    Nyckelord :HUMANIORA; HUMANITIES; mould circulation; terracotta sarcophagi; Roman colonization; petrographic microscopy; Late etruscan; mould generation; mould; archetype; votive head; terracotta; traveling workshops; velum; Ancient history; Antikens och forntidens historia;

    Sammanfattning : The Late etruscan terracotta votive heads from Tessennano were found near a rural sanctuary about a hundred km to the North of Rome in 1956. Whereas the facial fronts are serially produced with moulds, the backs are handmade. LÄS MER

  3. 2. On Defect Generation and the Appearance of Injection-Moulded Polymers

    Författare :Francesco Pisciotti; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; colour; gloss; ageing; rheology; defect; mechanical properties; surface topography; recycling; polypropylene; injection moulding; mass spectroscopy; simulation; polystyrene;

    Sammanfattning : This thesis addresses the generation of some important manufacturing defects associated with intrinsic limitations of the injection moulding process. These include bulk-surface structural discontinuities, particularly air traps and welds, bulk-surface compositional inhomogeneities and gloss and colour variations. LÄS MER

  4. 3. On the Characterization and Generation of Flow Marks on Polymeric Surfaces

    Författare :Giovanna Iannuzzi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tiger stripes; surface defects; rheological properties; injection moulding; polymer processing; flow marks;

    Sammanfattning : Polymer-based materials are widely used in the automotive industry for producing vehicle parts, for instance car bumpers, dash boards etc. A common manufacturing process for such components is injection moulding. LÄS MER

  5. 4. Deformability of unidirectional prepreg materials

    Författare :Ylva Larberg; Malin Åkermo; Patrik Fernberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; prepreg; deformability; carbon composite; Vehicle engineering; Farkostteknik;

    Sammanfattning :  To reduce cost of structural composites the development of more efficient manufacturing methods is of great interest. Sheet forming of thermoset prepreg, also known as hot drape forming, has been a promising manufacturing method for decades. An automatic tape layer (ATL) can be used to perform the lay-up in an efficient way. LÄS MER

  7. 5. Dimethylethylamine and dimethylbenzylamine in foundries and the epoxy industry : Analysis, metabolism, biological monitoring, toxicological effects and occupational exposure

    Författare :Bengt Ståhlbom; Christer Edling; Östergötlands Läns Landsting; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Dimethylethylamine (DMEA) and dimethylbenzylamine (DMBA) are tertiary aliphatic amines, used as catalysts e.g., in mould core manufacturing and heat cured epoxy systems. Health effects such as visual disturbances and respiratory irritation occur among workers handling DMEA and airway symptoms are recorded by many workers exposed to DMBA. LÄS MER