DOI:10.1049/tpe.1975.0167

出版商:IEE    

年代:1975

数据来源: IET

DOI:10.1049/tpe.1975.0168

出版商:IEE    

年代:1975

数据来源: IET

摘要:

Extrusion coating and laminating developed during the 1940s in the United States and was introduced to the United Kingdom on a commercial scale about a decade later. By the use of extrusion coating it is possible to combine the desired properties of the substrate and of the coating medium. Common substrates are paper, board, tissue, fabric, film and foil and the vast majority of coating and laminating media are polymeric plastics of which low density polyethylene is the one most often used. However, medium and high density polyethylene, polypropylene and other less common polymers are becoming increasingly used. By the judicious choice of the substrate, coating medium and machine conditions it is possible to develop packaging materials and other membranes with whatever combination of properties are required—barrier properties against moisture greases or gases, appearance, handle etc. Perhaps the most important basic properties when considering any particular polymer for extrusion are Melt Index and Density and the machine variables most likely to affect the final product are melt temperature, die-nip distance and nip roll pressure. Common uses for extrusion coated and laminated products are outlined showing how the materials are used for packaging and to provide membranes generally throughout industry from consumer packaging through to the building trade. Special mention is made regarding how extrusion can save resources and hence money for the user.

DOI:10.1049/tpe.1975.0198

出版商:IEE    

年代:1975

数据来源: IET

摘要:

A computer program is decribed which simulates production line flows. The program has been designed to run on minni-computers and requires only 4K, 16-bit words of storage to accommodate lines with up to 50 work stations. An example simulation of an actual line is described. It is suggested that the method would be a value aid to production line managers and planners.

DOI:10.1049/tpe.1975.0199

出版商:IEE    

年代:1975

数据来源: IET

摘要:

The paper presented here demonstrates by refernce to a practical example, how a simple methodology for the flow system design of a GT cell was developed. The paper further discusses the intimate relationship between the cell layout and its associated production control system. It is argued that it is essential to consider GT as a management system in which the arrangement of machines into manufaturing cells is only one fundamental step, but does not itself yield the potential savings obtainable from a GT system.

DOI:10.1049/tpe.1975.0200

出版商:IEE    

年代:1975

数据来源: IET