Basic knowledge of sealing machine
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, the packaging containers need to be sealed. This operation is completed on the sealing machine.
Introduction to 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.
Types of common sealing machines:
① Capping 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 often used for medicine bottles, and multi head thread is often used for can head bottles. The machine rotates the cover and presses it tightly at the mouth of the container. ② Rolling sealing machine. This kind of cover is mostly made of aluminum without any thread in advance. The aluminum cover is rolled with a roller to make it have the same thread shape as the bottle mouth thread, and the container is sealed. This kind of cover will be broken along the indentation around the skirt when unsealing, and cannot be restored, so it is also called "anti-theft cover". This machine is mainly used for sealing and packaging of high-grade wines and beverages. ③ Edging and sealing machine. The utility model covers a cylindrical metal cap on the bottle mouth, rolls its bottom edge with a roller to make it turn inward and deform, and tightly fastens the flange of the bottle mouth to seal it. This machine is mainly used for sealing and packaging of wide mouth cans. ④ Gland sealing machine. It is a crown cap sealing machine specially used for beer, soft drink 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 extruded and retracted, and clamped 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 Plug sealing machine. The sealing material is a bottle stopper made of rubber, plastic, cork and other elastic materials, and uses its own elastic deformation to seal the bottle mouth. When the machine is used for 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 can cover and the periphery of the can body flange to realize sealing packaging.
Principle of sealing machine:
Generally, the sealing machine is composed of a frame, a speed reduction and speed regulation transmission mechanism, a sealing printing mechanism, a conveying device, an electrical electronic control system and other components.
After the power is turned on, all mechanisms begin to work. After the electric heating elements are powered on, they are heated to make the upper and lower heating blocks rise sharply, and adjusted to the required temperature through the temperature control system. The embossing wheel rotates. The cooling system starts to cool as required, and the conveyor belt is rotated and adjusted to the required speed by the speed regulating device.
When the package containing articles is placed on the conveyor belt, the sealing part of the bag is automatically sent between the two sealing belts in operation and brought into the heating zone. The heat of the heating block is transferred to the sealing part of the bag through the sealing belt, so that the film is heated and melted, and then the surface temperature of the film is properly reduced through the cooling zone, and then rolled by the knurling wheel (or printing wheel), The upper and lower plastic films of the sealing part are adhered and pressed to produce a mesh pattern (or printed marks), and then the sealed packaging bags are sent out of the machine by the guide rubber belt and the conveyor belt to complete the sealing operation.
Maintenance of sealing machine
Regularly clean the machine surface, bottom plate, lower mold sliding plate, groove, upper mold internal pressing plate and positioning rod (Note: the power must be turned off and the normal temperature must be restored). Grease shall be regularly added to the driving parts of the lower die sliding plate, pressure bar bearing, eccentric wheel, guide column and guide rail to ensure the service performance of the machine.
Method for cleaning the tooth cutter: first plug the two drain holes of the lower mold with cotton balls, pour boiling water into the lower mold groove until it is full, then push the lower mold sliding plate into place, press the upper mold down to the lowest point, let the tooth cutter soak for several minutes until it is clean, and repeat for several times.
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