RU2266025C2 - Method for drawing out of volute from cone - Google Patents

Abstract

FIELD: food processing industry, in particular method for hydrocole treatment.

SUBSTANCE: volutes are washed, laid out in layers on pallets and frozen at -12-15°C for 12-24 hours. Then volutes are defrozen at room temperature for 1.5-3 h until volute tail is thawed. Further body is separated from cone for instance, using a fork.

EFFECT: method for drawing out of volute from cone without damage, losses of taste characteristics, and destruction of biologically active materials and proteins.

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Description

The present invention relates to the field of processing of aquatic organisms and can be used in the production of gastropods.

Problems arising from the application of known methods in this field are related to the quality of the raw materials supplied for further processing. These problems are related to the difficulty of extracting contents from mollusk shells.

There is a known method of extracting a body from a bivalve shell by a mechanical method (1), in which, using special cutters, the thin edge of the mollusk flaps is removed and a knife is introduced into the hole formed for cutting.

In a known manner it is impossible to extract the body from the shells of gastropods of mollusks completely and without damage. Splitting a shell to extract contents from it leads to damage to the body of gastropod mollusks, as well as to the ingress of a large number of small fragments, which makes meat unsuitable for food purposes.

It is also known to heat mollusks to extract the body from shells.

For example, in a method for preparing a bivalve mollusk dish (2), the mollusks are washed, placed in a container, which is hermetically sealed and partially removed air. The contents of the container are heated and then cooled. The shells open during heating.

There is also a method of separating contents and shells in bivalve mollusks (3) by steam treatment.

Thermal treatment of mollusks destroys valuable substances found in the soft body. The structure of the shells is deteriorating.

Closest to the known one is a method of manufacturing food products from uncooked shrimp (4), in which the shrimp is decapitated, then the shrimp product is frozen at -18 ÷ -22 ° C for about 3 days, then thawed at room temperature for 3-30 hours. The shells are removed by simple splitting and pulling off the body.

This method cannot be used to extract the contents of the shells of gastropods of mollusks, because thawing for 3-30 hours leads to complete thawing of the body of gastropods and the inability to extract it completely and intact from the shell.

Cracking a shell to extract contents leads to damage to the body of gastropod mollusks, as well as to the ingress of a large number of small fragments into it, which makes meat unsuitable for food purposes.

Freezing at a temperature of -18 ÷ -22 ° C for 3 days is economically disadvantageous, because leads to high energy consumption.

The technical result of the invention is the ability to extract from the shells of gastropod mollusks its contents without damage, without deterioration in taste and without the destruction of biologically active substances and protein compounds.

The specified technical result is achieved by the fact that in the method of extracting the contents of the shell by freezing, then thawing it at room temperature and separating the body from the shell, according to the invention, gastropods are pre-washed, then placed in layers on pallets, freezing is carried out at a temperature of -12 ÷ -15 ° C for 12-24 hours, thawing is carried out for 1.5-3 hours before thawing of the tail of the mollusk, after which the body is separated from the sink using a device, such as a fork.

Complete freezing of the body of the gastropod mollusk, then defrosting only the tail portion, which is attached to the deepest part of the shell, allows extracting contents from the shell using a device, such as a special fork, without damage, without deterioration in taste and without destruction of biologically active substances and protein compounds .

Laying of gastropods in one layer with subsequent rapid freezing at a temperature of -12-15 ° C is economically feasible, because at this temperature and with this placement of the mollusks in the freezer, the contents of the mollusk shells are uniformly frozen, and only the tail part of the body is thawed within 1.5-3 hours.

Thus, the set of distinctive features of the described system ensures the achievement of the specified technical result.

As a result of the analysis of the prior art, no analogue was found that is characterized by characteristics identical to all the essential features of the claimed invention, and the determination of the prototype from the identified analogues made it possible to identify a set of distinctive features that are significant in relation to the technical result.

Therefore, the claimed invention meets the condition of "novelty."

An additional search for other technical solutions related to methods for extracting the contents of shells of gastropods of mollusks, these distinctive features were not found, thus, the claimed invention meets the condition of "inventive step".

The method is as follows.

The gastropod mollusks are pre-washed, then placed in one layer on pallets and frozen at -12-15 ° C for 12-24 hours, then thawed for 1.5-3 hours until the tail of the mollusk is thawed, after which the body is separated from the sink with a device such as a fork.

Example 1

The gastropods are washed thoroughly from sand and silt, laid in a single layer on metal trellised trays and placed on shelves, which are placed in freezers of fast low-temperature freezing of -12-15 ° C for 12-24 hours. Then the racks are removed from the chamber and left at room temperature for thawing for 1.5-3 hours. In this case, only the tail of the mollusks, which is located deep in the shell and attached to the deepest part of it, is thawed.

Then they try and then pull the contents from the shells of the gastropods with a device, for example, a special fork.

The contents of the mollusk shells are taken out completely, without breaking the tail. The whole body remains intact.

Example 2

Carried out as in example 1, but the freezing is carried out at a temperature of -8-11 ° C for 4-11 hours, and defrosting is carried out for 1.5-3 hours.

Due to the thick walls of the shell, the body does not freeze inside it. As a result, it is completely impossible to extract the mollusk. The soft body comes off and part of it remains inside the shell.

Example 3

Carried out as in example 1, but the freezing is carried out at a temperature of -24-30 ° C for 12-24 hours, and defrosting for 1.5-3 hours. In this case, the mollusk body and its tail, located in the deepest part of the shell, do not have time to thaw, and the mollusk body cannot be removed.

The results of the experiments showed that it is economically most advisable to freeze at a temperature of -12-15 ° C for 12-24 hours, and thawing for 1.5-3 hours.

Using the proposed method allows you to remove the body of gastropod mollusks completely and in a raw intact form. Then it can be divided into food and technical. The latter is suitable for processing in various industries. In addition, the sink remains whole and clean, which is also suitable for further processing in various industries.

Used sources

1. US patent No. 05399117, MKI A 22 C 29/04.

2. DE patent No. 19941195, MKI A 23 L 1/33.

3. JP patent No. 2895781, MKI A 22 C 29/04.

4. GB patent No. 2355911, MKI A 23 L 1/33 (prototype).

Claims (1)

The method of extracting the contents of the shells of gastropods of mollusks, which consists in freezing them, then thawing them at room temperature and removing the body from the shell, characterized in that the gastropods are pre-washed, then placed in one layer on pallets and frozen at -12 - -15 ° C for 12-24 hours, and thawing is carried out for 1.5-3 hours before thawing of the tail of the mollusk, after which the body is removed from the sink using a device, such as a fork.