1, wire drawing: this process is one of the most expensive processes in the production of plastic tons bags, and there are four links that cause losses: 1. 1. When the film is melted and extruded into a film, plastic pieces and plastic blocks cannot form a film; 1.2 When the diaphragm is cooled and cut into broken wires, there are hard edges on both sides; 1.3 waste silk sucked into the waste silk box when the profiled monofilament is wound on the bobbin. 1.4 Change varieties and colors of different specifications at a time, and remove the consumption of filter screen.
2. Weaving: It also consumes a lot in this process. * * There are three processes to consume it: 2. 1 monofilament bobbin rotates on the warp frame, which needs to be arranged neatly, and there are fluff, floating silk and dirty silk when threading; 2.2 Filament, floating yarn and dirty yarn are produced when the weft yarn package enters the circular shuttle; 2.3 Every time the woven fabrics with different widths and different units are replaced, the consumption of monofilaments and single sheets before and after extradition.
3. Coating: The coating process is the second process that produces high unit consumption, and there are three small processes that produce consumption * * *: 3. 1 one ton bag cloth needs trimming after coating; 3.2 When the raw materials are melt-extruded, there is a film-forming high-temperature plastic melt; 3.3 Single-shuttle woven fabrics and composite woven fabrics with different widths and different unit weights should be submitted for consumption before and after each change of specifications and varieties.
4. Cutting: The cutting process is the third process that produces high unit consumption, and there are six consumption * * *: 4. 1 The unit consumption is different with different shapes of inlet and outlet. For example, the conical material port is connected to the bag body, which leads to greater material waste and is also affected by the length of the material port. The longer the material port is, the greater the unit consumption is. 4.2 Consumption of bag body: the bag cover on the bag body is connected with the inlet. The larger the inlet size, the more cloth the bag cover needs to be dug. Similarly, the size of the bottom cloth cover and the feed inlet is also one of the factors that affect the unit consumption; 4.3 Separate bags, which is to prevent the bags from bulging after loading, affecting transportation and storage, and saving space. There are many holes in each partition, which is convenient for smooth logistics, and the size and number of holes dug are the most expensive places; 4.4 The consumption of round bags is also large. It is necessary not only to dig holes in the bag cover and bag bottom at the entrance and exit, but also to cut the bag cover and bag bottom into circles, so that the unit consumption is even greater; 4.5 The consumption of suspenders and knots is relatively small, generally because the consumption of wool and floating silk is relatively small when the ribbon loom wears brown buttons when changing varieties. 4.6 Because professional automatic production equipment is used here and there, there will be an inevitable time difference once the wire is broken or the fault stops, which will affect the quality of woven fabrics, belts and other substrates, so it is necessary to eliminate the poor quality substrates when cutting.
5. Printing: When printing patterns or characters in tons of bags, positioning, proofreading and ink color will be consumed.
6. Inner bag: The consumption of inner bag is mainly due to the consumption of redundant parts cut off due to uneven blow molding control.
7. Sewing: The unit consumption of sewing thread used in the sewing process of ton package is very small and can be ignored.