For deheading cuts like
1.straight cut,
2.V-cut or
3.round cut, both the positioning of the cutting line and the course of it can be described mathematically by the dependence of head length measured from the end of the operculum and total fish length (Dutkiewicz and Dowgiallo, 1995 Dutkiewicz, D., & Dowgiallo, A. (1995). Wykorzystanie właściwości ryb słodkowodnych w projektowaniu odgławiarek [Use of morphometric properties of freshwater fish for designing of deheading machines]. In: Proceedings of the scientific conference on agricultural engineering – Achievements and perspectives (pp. 45–52). Krasnobród, Poland (in Polish).Dutkiewicz & Dowgiallo, 1995). It occurred that, in fish such as Crucian carp, bream, and roach, differences describing the curve of the operculum are not great and could be omitted in the current design considerations. It was also determined that the curve of the operculum of a single species of fish differs only slightly as body length increases. This means that an effective universal deheading machine can be designed for use with different fish species in a wide range of lengths.
The analysis conducted in previous works, which was confirmed by the results of measurements, indicated that the highest throughput with Crucian carp, bream, and roach was obtained with V-cut deheading at a 135° angle between the cutting lines (Dutkiewicz and Dowgiallo, 1995 Dutkiewicz, D., & Dowgiallo, A. (1995). Wykorzystanie właściwości ryb słodkowodnych w projektowaniu odgławiarek [Use of morphometric properties of freshwater fish for designing of deheading machines]. In: Proceedings of the scientific conference on agricultural engineering – Achievements and perspectives (pp. 45–52). Krasnobród, Poland (in Polish).[Dutkiewicz and Dowgiallo, 1995] and [Majewski, 2005]). The cutting line is shown against bream in Fig. 1. The throughputs obtained with round cut and straight cut deheading were lower by approximately 1.5–2% (ibidem).
For deheading cuts like straight cut, V-cut or round cut, both the positioning of the cutting line and the course of it can be described mathematically by the dependence of head length measured from the end of the operculum and total fish length (Dutkiewicz & Dowgiallo, 1995). It occurred that, in fish such as Crucian carp, bream, and roach, differences describing the curve of the operculum are not great and could be omitted in the current design considerations. It was also determined that the curve of the operculum of a single species of fish differs only slightly as body length increases. This means that an effective universal deheading machine can be designed for use with different fish species in a wide range of lengths.
The analysis conducted in previous works, which was confirmed by the results of measurements, indicated that the highest throughput with Crucian carp, bream, and roach was obtained with V-cut deheading at a 135° angle between the cutting lines (Dutkiewicz and Dowgiallo, 1995 Dutkiewicz, D., & Dowgiallo, A. (1995). Wykorzystanie właściwości ryb słodkowodnych w projektowaniu odgławiarek [Use of morphometric properties of freshwater fish for designing of deheading machines]. In: Proceedings of the scientific conference on agricultural engineering – Achievements and perspectives (pp. 45–52). Krasnobród, Poland (in Polish).[Dutkiewicz and Dowgiallo, 1995] and [Majewski, 2005]). The cutting line is shown against bream in Fig. 1. The throughputs obtained with round cut and straight cut deheading were lower by approximately 1.5–2% (ibidem).
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Answered by
Gyan Singh
, an ibibo Master,
at
5:38 PM on August 07, 2008