Dairy packaging technology (2)

(C) Packaging Machinery Dairy industrial packaging machinery can be roughly divided into two major parts: filling and sealing machinery and finished packaging machinery. Filling and sealing machines include cleaning machines, loading machines, and sealing machines. Finished packaging machinery includes labeling machines, packing, sealing and strapping machines.

1. Cleaning machinery In order to ensure the cleanliness of food containers, they must be cleaned before use.

(1) Tinplate thin-wall steel can washer uses a rotary disc cleaner. Hot water cleaning, steam sterilization. The production capacity is related to the cleaning time and the number of teeth of the star wheel. The cleaning time can be determined experimentally based on the degree of contamination of the tank. Such a system shall be provided with a continuously variable transmission to accommodate different conditions and different requirements.

Features: simple structure, large production capacity, small footprint, easy to adjust and operate, less water and steam and high cleaning efficiency. However, its biggest drawback is the poor adaptability of multi-tank production.

(2) The automatic bottle washer is mainly used for glass bottle washing. There are manual cleaning, semi-mechanical cleaning and fully automated cleaning. Now more automatic cleaning.

Automatic bottle washers are divided into double-ended and single-ended types according to the position of entering and exiting the bottle. The double-ended type enters the bottle in one direction and the bottle in the other direction. The advantage is that the net bottle is far from the dirty bottle and will not be contaminated. It is suitable for continuous operation, but it has a large area and requires two people to operate. The single-ended type refers to the bottom of the bottle at one end and the top of the bottle at the same end. The advantage is that it has a small footprint and can be operated by one person. However, there is a risk that the clean bottle will be contaminated, which is not conducive to continuous production.

(D) The packaging of different dairy products Dairy products have a long history of processing, a variety of products, the differences between products are also very large, there are fluids, semi-fluids, large solids, powder particles, as well as frozen expanded products, Different dairy products have different requirements for packaging materials, and there are also great differences in storage and transportation.

1. Fresh milk In general, dairy cows are processed independently of cow's milk. A dairy often has many raw material supply points. Even if it belongs to a company or a manufacturer, there is a distance between the husbandry factory and the processing plant, although it is currently available. Mechanical milking operations are used, but direct pipeline delivery is almost impossible. Therefore, the fresh milk before processing must be filled and stored after the pretreatment.

Containers generally use aluminum barrels, enamel barrels, plastic barrels, stainless steel barrels or stainless steel tankers. Specifications: 50 kg or 5 kg milk tank, milk tanker 2 tons, 4 tons, 5 tons, 10 tons.

The storage of raw milk is divided into two types of management modes: acquisition point and processing point. The acquisition point is quickly cooled to 2-10°C and stored in cold saline or ice water tanks. The processing factory must first clean the milk, cool it to 4～6°C, store it in a milk storage tank, store the milk tank with a sandwich, pass the cold salt water inside, keep it at 4～6°C, and stir it at the same time with a stirrer to prevent fat. Floating.