DE10029200A1 - Production line for manufacturing optical data media has process climate control with conditioned air fed to limited region of production line and only air free of particles to other regions - Google Patents

Abstract

The production line has conditioned air (5) fed into a limited region of the production line and only air free of particles (6) is fed into other regions, preferably regions bounding the limited region.

Description

introduction

Production lines for the production of optical data media such as CD-R and DVD-R need large amounts of conditioned clean air in conventional systems (in addition to the particle-free temperature and moisture stabilization) because the whole or at least large parts of the process room (disc cooling, transport area, Dye coating, edge cleaning, drying) with the medium become. This air conditioning is only possible with high energy input accomplish this, since the air must first be dehumidified in order to then adjust to the desired moisture level by re-supplying the liquid can. This use of energy has a direct negative impact on the Production costs of the optical data carriers. Research has shown that this elaborately prepared clean air only at a few points in the production process is really necessary. This led to the idea that the air was really only there Condition points. The basis for the invention was that of large ones Department stores known "air curtains" that prevent cold air from entering prevent the department store space.

invention

A process air conditioning system was developed with the following structure: As before, the entire process room is covered with commercially available clean room boxes, through which air flows from the surrounding room into the process room of the production system using blowers ( 1 ). The entrained particles are freed of air by built-in filter mats. If clean air with constant temperature and air humidity is required to stabilize individual process steps, this is led from the process air conditioning unit ( 3 ) directly to the "point of use" ( 4 ) by means of a piping system ( 2 ). The pipe or nozzle ends above the process station (e.g. dye coating on the disc) at a certain distance and blows the conditioned clean air directly onto the process location. Since the volume flow of air through the pipe system is higher than the air flow that flows from the filter boxes into the process space, an air bell of conditioned clean air forms above the process location, which prevents the entry of untreated air. Areas with conditioned clean air ( 5 ) and areas with only particle-free air ( 6 ) are created in the system chamber. In the area of the clean air bell, a laminar air flow is formed above the process location, which is derived by perforating the floor ( 7 ) in the process area without creating turbulence.

Result

The purity of the air is considerably higher in the air bell area than in conventional systems, as there are no mechanical Move parts in it. This leads to higher process reliability and less Failure rates.  

Disruptions to the clean room climate in the process area, for example by opening Machine hoods are practically excluded with this construction; Process failures due to particle contamination are drastically minimized. The areas to be conditioned are much smaller than in conventional ones Investments. The air conditioning units used are therefore much smaller Energy consumption, the manufacturing costs for the optical data carriers decrease.

Claims (1)

1. Production line for the production of optical data carriers, characterized in that conditioned clean air is supplied in a limited area and only low-particle air is supplied in other areas, preferably surrounding the limited area.