Injection molding description

Injection Molds and Molding A Practical Manual , 2nd Edition, Joseph B Dym Kluwer Academic Publishers (1987) ISBN 0442217854. Highlights include a description of CAD/CAM potential and process control capabilities, and a... 

Injection Molding. In injection molding a molten thermoplastic is injected under high pressure into a steel mold. After the plastic solidifies, the mold is opened and a part in the shape of the mold cavity is removed. General descriptions of the process and related equipment are given in References 29—34. 

Although most injection molding processes are covered by the conventional process description discussed earlier in this chapter, there are several important molding variations including ... 

The individual structural units of injection molding machines and then-functions will now be described in greater detail. By way of an example, this description will refer to a machine used for molding CDs. 

For the geometrical layout of a mold, CAD (Computer Aided Design) systems are available nowadays, with which an injection molding tool cannot only be described by two-dimensional drawings, but also shown as a complete 3-D model. The latter is of particular interest for the description of the often complex, shape-giving mold contours. The input for producing such a model... 

Injection molding alone (see description above) is also used to produce some packaging containers and components. Most threaded closures (caps) for bottles... 

This article addresses the issue of weldlines in PP-based plastics. It is divided into three parts. We begin with a brief description of phenomena leading to weldlines in injection-molded parts. The following section considers the structure and properties. In the last section, methods used to reduce the detrimental effects of weldlines are mentioned. 

M. Vincent, T. Giroud, A. Clarke and C. Eberhardt, Description and modeling of fiber orientation in injection molding of fiber reinforced thermoplastics. Polymer, 46, 6719-6725 (2005). 

More than 60% of nylon is used in injection-molding applications. About 55% of this use is in the transportation industries, and most of this use is concerned with automobile production. Table 6 shows the split of applications for which nylon was used worldwide in 1998 (3). Descriptions of uses for polyamides, split into the principal application areas are given below. 

The present edition is not only updated, but modernized and renewed. This is also indicated by the fact that only six of the old authors are still involved, and there are new chapters such as micro injection molds, molds for the rubber industry, or rapid prototyping, while others are no longer applicable. Otherwise, as it was already stated in the preface of the 4th German edition, it still applies that this compilation does not intend to serve as a textbook for the detailed design of an injection mold or to replace the catalogue of a manufacturer of standard mold units, and it is also not the long version of a lecture manuscript either. Rather, the brief description of the basic facts and the latest state of the art for the individual mold types and their manufacture allow a direct comparison in a compact form. 

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