3 Tipos de Máquina de Enchimento e Selagem

Filling and Sealing Machine Types

Due to the wide variety of bag shapes used for packaging items, the models and structures of filling and sealing machines also vary greatly, which is mainly reflected in the bagging and sealing devices. There are generally two types: one is a bag-making filling and sealing machine, and the other is a bag-feeding filling and sealing machine.

Bag Forming, Filling and Sealing Machine Type

It is suitable for the production of pillow bags, three-side sealed and four-side sealed bags, flat bags and self-standing bags. According to the different bag shapes, it can be divided into:

Lapel forming bag-making filling and sealing machine
Used for the production of pillow bags, the figure is a working schematic diagram of a vertical, intermittent lapel forming bag-making filling and sealing machine, which can complete plastic film bag making, longitudinal sealing (lap or butt joint), material filling, sealing and cutting.

After the flat roll film 3 passes through multiple guide rollers, it enters the collar former 4, where it is first sealed and formed by the longitudinal sealing heater 5, overlapped or butted into a cylindrical shape. At this time, a portion of material measured by the metering device falls into the bag from the hopper 1 through the feeding pipe 2. The transverse sealing heater 6 seals the bottom of the bag while pulling the bag down, and seals the previous bag filled with material, and cuts between the two bags to separate them. The finished bag 7 filled with material is separated from the equipment. The actions of each actuator of the machine can be automatically controlled by mechanical, electrical, pneumatic or hydraulic control.

Tower and cubic column bag-making filling and sealing machine

This machine is mainly used for filling and packaging liquid beverages, and the packaging container can be tower-shaped or cubic.

This machine is mainly used for filling and packaging liquid beverages, and the packaging container can be tower-shaped or cubic. The figure shows the working principle of the cubic beverage soft packaging filling and sealing machine of Tetra Pak. After the packaging material on the flat film roll 1 is disinfected by the printing device 2 (if there is already printed text on the packaging material, it can be omitted) and the hydrogen peroxide disinfectant tank 3, it is guided downward by the guide roller 4 and rolled into a cylindrical shape under the action of the forming rings 5 ​​and 7. The seam of the packaging bag is heated by the sterile air when it moves downward, and the packaging material is pressed into a longitudinal seal seam by the longitudinal sealing heater 8 when it passes through the last forming ring 9. The liquid material (such as juice and fresh milk) is pumped into the cylindrical packaging bag by the liquid feed pipe 6 by the pump, and the sterile hot air enters the cylinder from the outside of the material pipe and reaches the liquid surface. There is also a spiral heater 10 on the liquid surface, which sterilizes the inner wall of the material and forms a sterile air layer on the liquid surface.
The horizontal sealing and cutting are carried out below the liquid surface. Different configurations of the horizontal sealing device form different products of cubic column and tower packaging. In the case of tower packaging, the upper and lower horizontal sealing cutters are 900. The space is staggered, and the up and down and opening and closing movements are respectively performed to complete the horizontal sealing and cutting of the packaged items. When packaging in a cubic column, the cylindrical material bag under the liquid surface is pulled down, and the molding, sealing and cutting are performed by means of the composite movement of two pairs of right-angle forming molds and the horizontal seal in the opening and closing and up and down movements. The semi-finished product after cutting falls on the intermittently moving conveyor chain. During the operation of the conveyor chain, the finishing processes such as folding wings and folding corners of the material bag are completed, and finally the finished product 15 is unloaded from the conveyor chain.
Flat films used for beverages such as juice and milk are usually made of composite film materials such as waxed paper-aluminum foil-polyethylene. Before being rolled into a roll, the outer surface of the waxed paper has been printed with text instructions and pattern trademarks. A cubic column box is just a flat composite film material, and the top surface of the box is provided with an aluminum sealing hole for drinking; open the aluminum sealing hole and insert a straw to suck the beverage.

Direct Transfer Bag Filling and Sealing Machine

Only fill and seal, no bag making.
Before using the bag-feeding filling and sealing machine, various pre-processed empty bags should be stacked in the empty bag box. When working, one empty bag is taken from the bag layer of the empty bag box each time, and the empty bag is stopped at each station by the conveyor chain clamp to complete each packaging action.

The bag-feeding filling and sealing machine can be divided into two types according to the conveyor chain walking route: straight-moving type and rotary type. The former conveyor chain moves the empty bag in a straight line, and the latter moves in a rotary way. But the working principles of the two are basically the same. The figure shows the process route schematic diagram of the straight-moving bag-feeding filling and sealing machine. The bag-feeding device consists of a vacuum suction head and a bag-feeding conveyor chain. When the empty bag 2 moves from the empty bag box 1 to the blowing and bag opening station, with the help of the clamping hand of the working chain 9, the air pipe 3 blows air to the bag mouth of the empty bag to open the bag mouth. When the open empty bag moves to the station below the solid material hopper 4 and 5, the empty bag is filled with material, or the liquid feeder 6 injects liquid material into it. The chain conveyor 9 is provided with a clamping hand of a special structure? Each pair of clamping hands clamps one bag. The bag filled with material continues to move and is sealed by the heater 7, cold pressed and shaped, and finally the clamping hand releases the bag, and the finished product falls and is discharged through the discharging conveying device.
The figure shows an empty bag for three-side sealing, and the finished bag is a four-side sealing type. The bag making material is a single-layer film or a composite film. The single-layer film is not used because it is difficult to take and supply the bag.

Conclusão

Packaging bag types and vacuum packaging machines are integral to the food and pharmaceutical industries, ensuring product quality and prolonging shelf life. While various bag types are available to suit different materials and aesthetics, vacuum packaging machines enhance the preservation process by removing air, preventing oxidation, and facilitating thermal sterilization. The structure and working principles of both single-chamber and double-chamber vacuum packaging machines play a significant role in streamlining the packaging process, making it more efficient, reliable, and suitable for a variety of products. Understanding these packaging methods is essential for optimizing packaging operations and ensuring that products are well-protected for storage and transportation.