1, mixed cocoons, cocooning, cocooning, cocoon selection, cooking, reeling.

(1), mixed cocoon industry called mixed cocoon station for the Zhuangkou. The purpose of the mixed cocoon is based on the requirements of the process design, two or more of the Zhuangkou cocoon evenly mixed to expand the number of cocoon batches, balance the quality of cocoon, stabilize the process and operation, improve the quality of cocoon and production. Silk. There are two kinds of cocoon mixing machine, gross cocoon machine and light cocoon machine.

(2), stripping cocoon is a layer of cocoon coat outside the cocoon. Cocoon fibers are thin and fragile, and the silk threads are messy. Can not be used for coiling. In order to facilitate the selection of cocoon operations and cocoon identification, to ensure that the cocoon cooked accurately and evenly, must first peel the cocoon. Cocoon peeling is carried out on the cocoon peeling machine.

(3), in the cocoon peeling machine to choose each peeling cocoon. Batches of cocoons in the cocoon size, cocoon thickness, cocoon color and other differences. For this reason, should be based on the process design requirements for the selection of cocoon and cocoon.

(4), remove the cocoon in the cocoon can not be reeling cocoon called rough selection. In addition to foot cocoon, the original cocoon can be divided into cocoon and cocoon. Such as product grade requirements, ignoring the quality of cocoon.

(5), in order to choose the cocoon, must strictly remove the secondary cocoon species, and according to the size of the secondary cocoon species classification, known as selection. In the cocoon boarding, according to the size, thickness and color of the cocoon further selection of cocoons. Cocoon selection equipment generally use simple conveyor belt cocoon machine, each equipped with three to four workers, responsible for the division of labor, the implementation of artificial cocoon selection. Machine cocoon according to the machine sieve classification.

(6), dry cocoon cocoon layer in the cocoon between the silk has a greater adhesion, reeling process extraction speed, high tension, easy to break silk. Cooking cocoon can be properly expanded and dissolved silk glue, improve the strength of cocoon silk, to ensure that the cocoon silk continuous continuous dissociation.

(7), the essence of cooking cocoon is to make the silk continuous, continuous dissociation. The adhesive force between the strands is reduced to a certain program for coiling.

Extended information:

1, cocoon quality inspection has been based on cocoon inspection standards to collect cocoon whiskers, to determine the cocoon grid, according to the pricing level. Cocoon quality is generally measured by the following value standards:

(1), silk rate, mainly pointed out that the silk rate and fresh cocoon silk rate.

(2), relaxation value, including relaxation rate, relaxation length and other characteristics related to reeling productivity.

(3), silk quality value, including cocoon size, thickness gap and cocoon properties.

2, group value refers to the same batch of cocoon grains between the various traits and the consistency of the number of coconuts in the batch. These four values constitute the reeling industry raw material cocoon commodity value. Cocoon absorption rate is high, good decolonization, silk length, high silk rate, is excellent cocoon. In addition, white cocoon color, normal luster, cocoon shape and other characteristics are also important criteria for quality cocoons. The above criteria can be determined by the dry shell test and reeling test.

3, cocoon drying and storage of the use of heat to kill the pupa in the fresh cocoon and dry it into a cocoon, while maintaining the quality of cocoon, to prevent mold. Cocoon drying, commonly known as baking cocoon.

4, in addition to timely killing of pupae, to prevent the emergence of seedlings and cocoon layer transpiration, heat mold, the main removal of fresh cocoon, especially dry cocoon most of the water. Fresh cocoon layer water content of about 11% to 13%, pupa water content of about 74% to 79%. It is best to bake to about 15% When the cocoon layer is too dry, the hydrophilicity of the silk glue in the cocoon layer is reduced, resulting in poor relaxation.

5, cocoon drying process is divided into three stages: preheating stage, constant speed drying stage and deceleration drying stage. Cocoon drying machine and cocoon drying machine are commonly used cocoon drying methods. In addition, vacuum drying, infrared drying, microwave drying and nuclear radiation drying. The temperature, humidity and hot air flow in the drying room should be in line with the process requirements of the various stages of cocoon drying.

6, the temperature is generally controlled at 110-120 degrees Celsius, wind speed from fast to slow. After drying the cocoon by cooling the packaging and storage. Cocoon storage should be built in a high dry, moisture-proof, airtight, ventilated place to prevent mold and pests and rodents. Harmful to the dry cocoon of the main fungi are Aspergillus, Penicillium and white mold, these fungi are easy to spread in the humid environment, resulting in cocoon mold damage.

7, the relative humidity of the reservoir should be controlled between 60% -70%. Cocoon warehouse of the main pests are valley pirates, bark beetles, cotton bollworms, etc., into the warehouse before the need for drugs to kill.

Baidu Encyclopedia - Silkworm cocoons