after the product is loaded into the packaging container, in order to seal and preserve the product, maintain the product quality and avoid product loss, the packaging container needs to be sealed. This operation is completed on the sealing machine. Sealing machine refers to the machine that seals the container after the product is contained in the packaging container
there are many materials for making packaging containers, such as paper, plastic, glass, ceramics, metal, composite materials, etc., and the shape and physical properties of packaging containers are also different. Therefore, the sealing forms and sealing devices used are also different. Generally, according to the mechanical properties of packaging materials, it can be divided into the following two categories:
(1) flexible container sealing device
flexible container is a bag container made of flexible materials, such as paper, plastic film, composite film, etc. The sealing of this kind of container mostly forms a combined machine with bag making and filling, which is rarely used independently. Due to different materials, its sealing device is also different
① paper bag sealing device. For paper materials, adhesive is generally applied at the sealing place, and then mechanical pressure is applied for sealing
② sealing device for plastic film bag and composite film bag. Many plastics have good heat sealing performance. Plastic bags or composite bags made of this kind of plastics are generally heated directly at the sealing place and applied with mechanical pressure to make them fuse and seal
(2) rigid container sealing machine
rigid container refers to the container whose shape is not easy to change after the container is formed. Its sealing mostly uses different forms of covers. There are the following types of sealing machines in common use
① capping and sealing machine. The cover is processed with internal threads in advance, and the threads can be divided into single head or multiple heads. For example, single head thread is used for medicine bottles and multi head thread is used for can head bottles. The machine rotates the cover and compresses it at the mouth of the container
② rolling sealing machine. This kind of cover is mostly made of aluminum without threads in advance. The aluminum cover is rolled with rollers to make it have threads exactly the same as the thread shape of the bottle mouth, and the container is sealed. When unsealing, the cover will break the indentation along the periphery of the skirt and cannot be restored, so it is also called “anti-theft cover”. The machine is mostly used for sealing and packaging of high-grade wines and beverages
③ edging and sealing machine. Firstly, the cylindrical metal cap is sleeved on the bottle mouth, the bottom edge is rolled with a roller to make it turn inward and deform, and the flange of the bottle mouth is tightly fastened to seal it. The machine is mostly used for sealing and packaging of wide mouth cans and bottles
④ gland sealing machine. It is a crown cap sealing machine specially used for beer, soda and other beverages. Place the crown cap at the bottle mouth, press down the capping die of the machine, the corrugated periphery of the crown cap is squeezed and retracted, and is stuck on the flange of the neck of the bottle mouth, resulting in the mechanical hook between the bottle cap and the bottle mouth, so as to seal the bottle
⑤ press plug sealing machine. The sealing material is a bottle stopper made of rubber, plastic, cork and other elastic materials, which uses its own elastic deformation to seal the bottle mouth. When sealing, the bottle stopper is placed above the bottle mouth, and the bottle stopper is pressed into the bottle mouth through the pressure in the vertical direction to realize sealing and packaging. The pressure plug seal can be used as either a separate seal or a combined seal together with the bottle cap
⑥ crimping and sealing machine. The machine is mainly used for sealing metal food cans. The roller is used to crimp, hook and compress the periphery of the can cover and the flange of the can body to realize sealed packaging.
it means that plastic bags or other containers need to be sealed after filling. At this time, what we need to use is the sealing machine. Generally speaking, the sealing machine can be divided into flexible sealing machine and rigid sealing machine, and there are many more specific ones.
is to seal the package so as not to leak air or articles There are many kinds of sealing machines, depending on your own needs
the sealing machine is a machine that seals the containers filled with packaging materials. After the products are loaded into the packaging containers, in order to seal and preserve the products, maintain the product quality and avoid the loss of products, it is necessary to seal the packaging containers. This operation is completed on the sealing machine
according to the application of materials, sealing machines can be divided into the following common types
plastic bag sealing machine, milk tea sealing machine, vacuum sealing machine, plastic cup sealing machine, jelly filling and sealing machine, fruit juice beverage filling and sealing machine, instant noodles sealing machine, Babao porridge filling and sealing machine, coffee filling and sealing machine, sand ice cream filling and sealing machine, duck blood filling and sealing machine, nitrogen sealing machine, small dish vacuum sealing machine, chili sauce sealing machine, tomato sauce sealing machine, fast food box sealing machine, Wide mouth bottle sealing machine, mineral water beverage filling and capping machine, yogurt bottle filling machine, etc.