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Article | REF: AM3673 V1

Injection presses

Author: Thomas MUNCH

Publication date: March 10, 2009

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ABSTRACT

The aim of this article is to provide assistance in the choice of a standard press, its usage and the optimization of the process. The choice can be made on the basis of a competitive fabrication, quality, cost and also the possibility of fabricating a new part. Most often, the technical choices and therefore the cost of the part are defined after its fabrication. In order to make the appropriate choice, the industrial performance and the economic approach must also be taken into consideration. The uses and settings of presses must, on their part, be optimized. The understanding allows for solving quality issues; the identification of causes and resolutions, the setting errors and also the variation in the viscosity of the matter must also be considered.

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AUTHOR

  • Thomas MUNCH: ENSAIS-EAMP engineer - Associate Professor of Mechanics - Former Injection Manager at Hager SAS

 INTRODUCTION

Injection molding machines are the subject of three articles:

  • the first, [AM 3 671] , describes and comments on the constructive solutions used by injection moulding machine manufacturers;

  • press characteristics, the means and methods for quantifying them, and press architecture are covered in [AM 3 672] ;

  • the choice of a standard press, its use and process optimization are the subject of this article [AM 3 673] .

The main role of a press is to establish a manufacturing process capable of making the most of the mold and the material, i.e. to obtain the part conforming to the required quality level with the shortest possible cycle time.

The first part of the article proposes a method for choosing the right press model for the right application. The second and third parts detail setting up and remedying manufacturing problems and defects.

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