Diaper Pants,Baby Diapers Pants,Cotton Diaper Pants,Waterproof Diaper Pants Shandong Tianzige International Trade Co., Ltd , https://www.sdbabydiapers.com
1. Bagging method (1) manual operation. The bags are taken manually, opened, placed under a discharge hopper, or filled with a tube, or filled with a tube. After the filling, the bag is moved to a sewing machine or a gluing machine to seal it.
(2) Semi-automatic operation. On the basis of manual operation, adding some auxiliary devices becomes semi-automatic operation. If the bag is taken manually and the bag is opened, after the bag is placed on the filling pipe, a pneumatic or mechanically operated automatic bag holder can be installed on the filling port. After the bag is fully filled, the bag is transported to the sealing station by the conveyor belt. , sealed with a machine.
(3) Fully automatic operation. The bag is removed from the storage bag, opened and clamped, sent to the filling station, positioned and filled, and sent to the sealing station seal after filling. The entire process is automatically performed by the mechanical operation.
The main link of the bagging method is filling, and the filling method is related to the type and fluidity of the materials to be filled. The valve bag is mostly used for gross weight weighing method, and the open bag can be weighed with a gross weight and a net weight. Liquid materials are usually filled by a constant volume method. See "Filling Technology" for details.
There are many ways to seal a large bag, and its choice depends on the type and material of the bag. The valve bag has foldable sealing valve and tube, which can be folded by hand and then sealed. It can also be folded and sealed after the valve tube is closed. The opening bag is often sealed with a bag sewing machine. Usually, the two corners of the bag mouth are held by hand. Stitching is performed by a bag sewing machine. In order to increase the strength of the seal, the paper bag or tear-resistant material can be added to the bag mouth and then stitched; in addition, the hot melt adhesive is applied to the bag mouth during bag making, and the seal is heated in the heat seal device. Folding pressure seal; also apply pressure seal on the production line.
The suture closure method is the strongest, economical, and adaptable. The seams of the sewing closures are chain-shaped, the drawing opening is extremely convenient, and the sealing speed is also higher than the bonding type. However, due to suture needles, moisture-proof and leak-proof are not as good as adhesive seals. Due to the current low level of technology, the speed of adhesive sealing also lags behind the filling speed. Before the sealing, the bag mouth is often subjected to artificial shaping and folding. Sealing speed is lower than stitching. Therefore, the large bag adhesive sealing method has not been widely used.
2. Small Bag Filling Methods There are many different methods of bag filling. Different equipments are used depending on the prefabricated bag and the bag-filling bag-making method.
(1) Prepare prefabricated bags Remove a bag from the storage bag holder, open the bag opening, fill the material, and seal it. This is generally done on a bag filling and packaging machine in an intermittent rotary multiple station. Due to the need to open the bag opening, the time required for filling and sealing is high, and the productivity is low. The solid material is filled with about 60 bags/min, and the filled liquid material can only be packaged with 30 to 50 bags/min. Because it is an intermittent movement, the speed of improvement is limited, and it is required to take the bag accurately and easy to open. Therefore, the application is not extensive.
(2) Bag-filling-sealing bagging This bagging method has been in existence for nearly 60 years. In the past 20 years, with the changes in the market, people's lifestyle needs and the progress of soft packaging materials and technology, the demand for soft pouch packaging has been increasing. Due to the rational arrangement of process steps in this bagging method, saving materials, energy and labor, high productivity, and low production costs, it is widely used. However, there are certain requirements for packaging materials, mostly plastic films and composite materials with certain strength.
This bagging method is accomplished by a bag filling and packaging machine. There are two kinds of packaging methods: one is to make bags first and then to open bags, fill and seal separately. The other is bagging, filling and sealing alternately and continuously. This method is also called coherent type. It has two basic bagging methods, namely vertical bagging (two types of bag filling machine and multiple bag filling machine) and horizontal bagging (with horizontal Pillow type bag filling machine and horizontal linear bag filling and packaging machine, etc.).
For the specific process arrangement and operation process, the working principle and sealing method of each machine can refer to the relevant sections of the book “Packaging Machineryâ€.
Third, the choice of bagging equipment points Bagging machine and its supporting devices are many types. The function, production capacity, shape and size of the bag, the materials used and the prices vary, and they vary greatly. The selection must be based on the specific conditions of the factory and the market; the introduction of foreign equipment must comply with domestic conditions. In addition to general issues, the following points are proposed for reference when selecting equipment.
(1) The filling metering device should be selected properly. When packing certain particles and powdery materials, the specific gravity must be controlled within the specified range, so that volumetric metering can be used. Otherwise, weighing can be used instead. Special attention should be paid to materials that are sensitive to air humidity and temperature.
(2) The heat-sealing properties of the sealing and the packaging materials used must be adapted. Otherwise seal quality cannot be guaranteed.
(3) When filling the powdered material, the bag mouth is easily contaminated, affecting the sealing quality. Most of the time, it is due to static electricity on the surface of the packaging material. Therefore, the bagging machine must have measures to prevent the bag mouth from being contaminated by dust, such as a static eliminator.
(4) When the bagging speed is fast and the price of the packaged goods is expensive, it is better to have a checkweigher to remove excess or underweight packages at any time and automatically adjust the filling volume.
(5) Pouch packaging is suitable for continuous bag filling machines or production lines. This highly automated stand-alone or production line, in the event of a failure, will suffer significant losses in production. Therefore, it is necessary to choose a machine with good quality and high reliability.
Bagging Technology (below)
Second, bagging method bagging method The packaging materials used by the type of bag, bag making methods and so on. Different from the big bag and the small bag, the bag filling and the bag filling are also different.