Casings corrugation is the process of compressing a large section of the shell into a corrugated doll of a given size.
The collection of the sleeves of sausage casings into folds and molding in the form of corrugated dolls is carried out on special equipment - corrugators. They may have different designs, but the principle of shirring remains the same: the shirring casing is delivered in rolls, it is unwound from the reel on the shirring machine and filled with air. The shell inflated with air is pulled over a pipe, which has a diameter that subsequently determines the inner diameter of the corrugated doll. On the corrugated pipe, the shell is folded. After the corrugation of the required length has been made, the shell is cut off and compressed. Important in the process of corrugation is the compression ratio, which is determined by the ratio of the length of the non-corrugated shell to the length of the corrugated doll.
In the case when a mesh is put on the corrugated and compressed sleeve of the shell to fix the shape and density of the corrugated doll, then we are talking about "soft" corrugation.
To obtain a "rigid" form of corrugation during the corrugation process, the surface of the shell is treated with a special composition, then the shell sleeve is very tightly compressed and dried. After that, the shape of the corrugated doll remains fixed, stable and does not need additional fixation with a mesh.
The use of corrugated casings has a number of significant advantages:
Significant time savings:
Less likely to cause damage to the integrity of the shell during its preparation for use:
Casings consumption is reduced:
The use of a corrugated casing is an essential attribute of a modern meat processing enterprise. Therefore, the leaders of the meat processing industry work exclusively on shirred casings.