PLC controller for hydraulic pressing machine

Pressing Machine is the heart of the brick production lines where a hydraulically operated pressing machine is considered to be a complex system; this work describes the design and experimental implementation of a control system for a hydraulic pressing machine. The overall operation and control is based on a programmable logic unit and a sensory system. The functionality of the control system is analyzed through simulation Packages, and validated with physical experiments.

1. Introduction

A century ago the manufacturing of sand lime bricks began [1]. During that time control technologies changed while production steps of bricks are similar. Bricks made by hand or by machine [2], however; much of the process is now automated, brick-making is simple and basic. The Brick pressing stage has the following essential steps: •

Loading the mixture in the die “mould”.

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Compression of the mixed material.

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Removing the block from the mould.

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Wet curing, the length of time depending on the climate and the nature of the stabilizer [3]. “Not done for sand lime bricks”.

Figure (1)

Structure of press machine [4]