When I was a child, I was appointed to remove the woven bag with rice. I was confident that I took the scissors and cut the rope. The fantasy bag would crack quickly because of this gap. As a result, the sealing of the rice bag was very tenacious. until seen grandmother, I saw she took demolished half of the bags, took the other end of the long head untied, then gently pull the top of the bags immediately all open, so I was impressed very Zhefan operation Deep. However, when I went to the supermarket to buy rice last week, I found that the current rice bags are mostly vacuum-sealed and can only be seen sporadically. One or two brands still use sutures for sealing. Then the existing sealing machinery used in these packagings What are you?
The woven bag sealing machine automatically upgrades from the manual to improve the sealing efficiency of the woven bag
Previously, rice was packaged in woven bags. It was necessary to seal the top and bottom. It is not difficult to see that the bottom and top of the rice are different. The bottom usually folds the package to enhance the firmness. Therefore, the bottom of the woven bag when sealing fit hemming machine components often requires the hemming machine for seam sealing. need to be sealed at the top after completion of the filling, with a distinction between portable and automation, using portable sewing machine motor is driven with a pressure foot, needle bar, through wire springs, and the like gripper device for sewing, the thread needs to complete the introduction of the sealing slot is cut. In order to avoid frequent site of the needle bar breakage due to excessive friction, generally equipped with pumps, pipelines and other apparatus, lubrication can be achieved automatic oil supply, to strengthen the durability of the product. Although this device has only 2 ~ 3kg, but after all, need to be hand labor, not applicable in the case of large work intensity, packing enough fine also prone to the phenomenon.
In order to solve this problem, a fully automatic sewing machine has appeared on the market. This equipment is equipped with a corresponding conveyor belt, and the sewing machine is fixed at a suitable height. The rice can be sealed by placing the filled rice on the conveyor belt. According to Xiamen In view of the sealing machine produced by a machinery company, the equipment has two forms of hemming sealing and edging sealing, which can meet the requirements of different packaging styles. In addition, this automatic sealing equipment can also be combined with other equipment. Combine to form a complete production line. For example, in the process of rice packaging, combined with filling equipment to form a complete rice packaging production line.
Heat seal packaging ratio increase with vacuum pumping to save space
Although in the early days, many woven bags were used to package rice, this kind of packaging played a role in accommodating, insect-proof and mildew-proof. In the use, these weaknesses became more and more prominent, and the vacuum-packed vacuum package was taken on board. Occupy the vast majority of the market. According to the author's observation, today's rice heat-sealed packaging can be divided into two types: ordinary packaging and vacuum packaging. After the ordinary packaging is sealed, there is still gas inside, and after vacuum packaging, it is more brick-like. In comparison, there is a big advantage in saving space during transportation after vacuuming.
Rice wants to be vacuum packed into a brick shape. It is also necessary to purchase a special bag for rice bricks. The rice is placed in a fixed shape mold and then placed in a vacuum packaging machine for pumping, heat sealing, etc. In order to vacuum the rice, During the sealing process, the 'honeycomb effect' does not appear due to the softness of the packaging material, which affects the appearance of the final product. It needs to be packaged with a higher strength material. It is sealed by a heat sealing machine when sealing. The heat sealing is a kind suitable for plastic film base. Material, flexible packaging, composite film and other materials sealing method, more collection inside the vacuum packaging machine, need to display the package temperature on the outside for easy adjustment. Separate as a device to achieve independent temperature control of the upper and lower heat seal, but also for the hot cover Shape, form to choose.
After carefully comparing the two, I found that the different packaging methods depend on the packaging materials. The seams are mostly woven bags, and the heat-sealed packaging materials are mostly thick nylon. Vacuum heat-sealed packaging The method of sealing is not suitable for woven bags, because there are holes between the woven bags, the gas permeability is good, the vacuum cannot be realized, the firmness of the packaging materials is not enough, and it is easy to leak after heat sealing. In comparison, the vacuum Heat sealing not only can prevent insects and mildew, create an environment that is not conducive to microbial growth, but also save storage space during handling, and gradually become more popular among businesses.