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Libroplantasingl

LIGHT WEIGHT PACKAGING SORTING PLANTS CONTROL 3 Quality control operations Rejected waste composition control Characterisations of the rejected waste of light weight packaging plants as discussed in the quality control section for collected waste. Used as an indicator of which materials are not being selected correctly. Selected materials in stock control Involves counting bales pending delivery to a recycler. This type of check, in addition to being performed as a preliminary stage for bale quality control in order to determine the sample size, can be performed specifically when there is an incident in production control. Summary of quality control operations for bales: 1. Check the number of bales of each material being held by counting the number of bales in stock. 2. Determine the sample size (number of bales to control as per Table 2). 3. Select the first bale at random. 4. Measure the dimensions of the bale (in order to obtain the density). 5. Open the bales and perform control: materials must be selected manually. The total weight of the bale is obtained by adding up the weights of the selected materials. To weigh the materials, a suitably calibrated and/ or verified precision scale is provided. 6. Check that the materials have been correctly selected. 7. Record the results on a sheet prepared for this purpose (Quality Control Sheet). 8. Controls resulting from annual programming: obtain average amount for total percentage of non-targeted materials found in each bale analysed. Then this average value will be compared to the limit of total non-targeted materials specified in the corresponding TSRM. If this value is exceeded the material will not comply with the specifications. First designation controls as recoverer/recycler: the process described above (steps 1 to 7) is repeated until reaching the number of reject bales suggested by the MIL-STD-105D method for each material or the batch or stock is accepted. Controls resulting from non-conformities: in this case,


Libroplantasingl
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