Tài liệu Design and optimisation of conformal cooling channels in injection muolding tools docx

... produced. The main objective of this study was to determine an optimum and efficient design for conformal cooling/ heating channels in the configuration of an injection moulding tool using FEA and thermal ... molten polymer being injected into a cavity inside a mould, which is cooed and the part ejected. The main phases in an injection moulding process therefore involve...

Ngày tải lên: 12/02/2014, 22:20

... comparable to an optimum design in conventional of beam and slab systems Design Considerations. . . . Design Considerations. . . . DEFLECTION CHECK • necessary to include checking of the slab deflection ... based on spacing of reinforcement as detailed and the moment envelope obtained from structural analysis • good detailing of reinforcement will – restrict the crack...

Ngày tải lên: 12/12/2013, 14:15

... the drains of input pairs from output nodes, and keep drain nodes tracking the input, thus minimize effective input capacitance. A V gs-eff of 0.25V, and a bias current I dc of 100µA are used in design. ... 3.2 [8]. Optimal buffer design requires a trade-off between minimization of input capacitance and minimization of thermal noise. Increasing transconduc- tance of t...

Ngày tải lên: 22/12/2013, 08:16

... however, this gap has been closing in recent years due to decreasing numbers of men smoking and increasing numbers of women smoking in certain countries. In addition, smoking-associated deaths among ... with an infection ratio of 2:1. In women the predominant routes of transmission are heterosexual contact and injection drug use (ECDC 2008a). In terms of other se...

Ngày tải lên: 12/02/2014, 23:20

... scaffolding architecture of injection mould can maintain the mechanical stability to withstand the injection mould pressure and locking pressure during mould opening and closing. The mould designed can ... (2001) The design of conformal cooling channels in injection molding tooling. Polym E Sci 41:1265–1279 10. Li CL (2001) A feature-based approach to injection mould...

Ngày tải lên: 12/02/2014, 22:20

... living in a big city now. I stop bushes and plants grow in the woods. a. to see b. see c. saw d seeing 9. I am very happy your kind invitation to the buffet. a. accept b. to accept c. accepting ... appear until the end of the 14 th century. Illiteracy was not seen as a problem until the end after the invention of printing in the 15 th century. The first significant decline in...

Ngày tải lên: 23/11/2013, 10:11

... marine waters really gained ground in the 1980s and in inland waters in the 1990s (Shariff and Nagaraj, 2000). Korea started growing a European variety of common carp and maintained yellowtail in ... exchange in the net, thereby washing away faeces and uneaten food. Biofouling Biofouling is an important and common problem in cage culture. The rate of biofouling in...

Ngày tải lên: 09/12/2013, 22:15

Ngày tải lên: 12/12/2013, 00:15

... to invasiveness of pathogenic bacteria by reducing opsonisation and protecting from phagocytosis.  E.g. Streptococcus pneumoniae in RTI  vaccination: pneumococcal; meningococcal A and ... shorter and finer than flagella  Two classes:  ordinary pili ‘colonisation antigens’. Protein, attachment to host cells. Can be involved in host cell invasion e.g. Neisseria menin...

Ngày tải lên: 12/12/2013, 17:15