31-07-2012, 10:07 AM
AUTOMATIC PAINT SPRAYING EQUIPMENT
(##)AUTOMATIC PAINT SPRAYING EQUIPMENT-POWER ELECTRONICS.doc (Size: 625.5 KB / Downloads: 60)
SYNOPSIS
The goal of this project was to implement the most efficient and automatic paint spraying equipment. There are many fields in which automation may be related to electrical, mechanical, psychology and philosophy. In our project, the process how the paint sprayed is the material is placed on the conveyor belt. The conveyor is used to transfer the material from one place to other place.
The material is then passed through the heater where it is heated by means of air for the purpose of removing the dirt and heat the surface so that the sprayed paint attaches the material surface perfectly.
When the material reaches the sensor, the deflection of IR rays makes the solenoid valve to activate the compressor air. How the IR rays activate the valve is, when the material passes through the sensor the actual time taken for the IR rays to reach receiver from transmitter changes as they travel in less time while the material passes rather than empty.
As the solenoid valve activates the compressed air the spray gun performs spraying when the material passes through sensor. There by paint spraying is done faster without any help of labor and the whole control is done by the control valve and not any other manual control. The conveyor is rotated by an electric motor.
As the spraying is done without any labor there will be no harm to labor and the work is dome accurately.
CHAPTER-2
INTRODUCTION
This is an era of automation where it is broadly defined as replacement of manual effort by mechanical power in all degrees of automation. The operation remains an essential part of the system although with changing demands on physical input as the degree of mechanization is increased.
Degrees of automation are of two types, viz.
Full automation.
Semi automation.
In semi automation a combination of manual effort and mechanical power is required whereas in full automation human participation is very negligible.
Need For Automation
Automation can be achieved through computers, hydraulics, pneumatics, robotics, etc., of these sources, pneumatics form an attractive medium for low cost automation. The main advantages of all pneumatic systems are economy and simplicity. Automation plays an important role in mass production.
CHAPTER-3
PCB DESIGNING
PRINTED CIRCUIT BOARD (PCB)
Nowadays the printed circuit board hereafter mentioned as PCB’s makes the electronic circuit manufacturing as easy one. In olden days vast area was required to implement a small circuit. To connect two leads of the components, separate connectors are needed. But PCB’s connect the two leads by copper coated lines on the PCB board.
PCB’s are available in various types’ namely single sided and double sided boards. In single sided PCB’s the copper layer is one side.
MANUFACTURING:
First, the wanted circuit is drawn on a paper and it is modified or designed to reduce the space this designed PCB layout is to be drawn on the plain copper coated board. There boards are available in 2 types.
1. Phenolic
2. Glass epoxy
Most computer PCB’s are glass epoxy. To draw the circuit diagrams we can use the black colour paint. Before that the required size of the plane PCB board is determined from the roughly drawn PCB layout. Using black paint the desired circuit is drawn on the board.
CAD IN PCB:
First the PCB layout is designed by CAD. The print out is taken from the computer (of large size) for out clearance. This layer is given to the photography section to get the layout in its actual size. From this we can have the positive and negative images of the layout.
This photographic image is exposed in the following three methods.
1) Polybluem
2) Chrombin
3) Five star
The exposed mesh is placed on plain copper coated board in correct alignment by using wooden clamps. Special paints are used to spread over the mesh. Paint flow through the board and the layout lines are made on the copper board. Finally, there are fine layouts on the copper board.