Method for predicting presence of product defects during intermediate processing step of thin product wound in roll
A technology of intermediate processing and winding into rolls, which is applied in the direction of thin material processing, winding strips, textiles and papermaking, and can solve the problems of slowing down production processing and loss
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example 1
[0393] Consider a process in which a tissue-wrapped product is to be created and includes primary steps (in-line production and winding on primary rolls), packaging and converting. The rewinding step in the example in question does not exist, and the conversion operation takes place directly with a primary type of single-sublayer roll (master roll).
[0394] During the production step, it is necessary to ensure that the product of the processing problem is limited in the conversion step.
[0395] The process allows to collect some of the parameters indicated above, especially in a preliminary step, collecting at least the following measurements:
[0396] - volume identifier (this is the primary volume identification code);
[0397] - product type identification (code identifying the type of product; the grade depends on the type of product / process / producer / customer);
[0398] - machine type (code indicating the winding machine);
[0399] - roll length;
[0400] - format wi...
example 2
[0450] Let us consider a process for nonwoven products that joins and bonds together several nonwoven sub-layers of the same nominal width in a converting step.
[0451] The process consists of primary steps (nonwoven production, winding into primary rolls), rewinding, packaging and converting steps.
[0452] During the unwinding and handling steps in the final converting machine, the width of the nonwoven product may vary relative to the original width of the product due to different unwinding tensions. It can be observed that in some cases the degree of narrowing varies between the sub-layers to be joined, leading to a substandard or in any case lower quality end product. Interactions and influences of product production and winding factors that lead to differential narrowing between sublayers must be identified.
[0453] With regard to the product and process parameters to be considered, these are at least all parameters previously indicated for the primary step, rewinding...
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