Step 1: Ask the user about the fault of the paper bag machine.
The second step: According to the user's paper bag machine fault description, analyze the factors forming such faults.
The third step: open the repaired equipment, admit the damaged equipment, analyze the feasibility of repair and rehabilitation.
The fourth step: According to the working position of the damaged equipment, read and analyze the operating principle of the circuit to find out the factors of the damaged equipment.
Step 5: Contact the customer, submit a repair quotation, and seek user repair opinions.
Step 6: Look for relevant equipment for replacement.
Double Channel Continuous Roll T-shirt Bag Paper Bag Machine
1. Cutter: It is the most important part of the system. It uses movable knives and sliding guides. The floating tissue is compressed by a tension spring. The upper and lower knives can be adjusted. A conditioning screw is set in between, which can be used to adjust the tightness of the cutting knife and can excellently remove the phenomenon of difficult-to-cut materials.
2. Bag-making length regulator: The bag-making length is adjusted by changing the position of the connecting rod sleeve on the migraine carriage to control the bag length, and the bag-making size is adjusted by the elastic hand wheel and the nut.
3. Overrunning clutch: Sinoplastic overrunning clutch is the most important part of this machine. Its quality and function directly affect the error of product length. However, due to the high frequency of operation, its life span also has a certain limit during use. If there is an error in the length of the bag during the production process (usually after half a year of continuous production), and other problems cannot be resolved after removing other problems, the clutch can be disassembled for inspection and repair.
4. Adjustment of the interval between welding wire and cutting line: The interval between welding wire and cutting line is usually 5-10mm. Roll the handwheel on the adjustment frame to make the beam roller rise or fall at a certain interval to obtain the ideal cutting line. In order to facilitate the investigation of the quality of the welding wire, the welding wire orientation of the single bottom wire can be adjusted to the outer end of the machine cutter. If the welding line and the bottom line are not parallel, loosen the fixing screw of a bevel gear and roll the hand wheel to increase or decrease one end of the beam roller; after the production is stable, tighten the screw of the gear.
5. Adjusting method of welding knife: put a piece of thin paper on the supporting seat, roll the big hand wheel in the body box by hand to make the welding knife at the bottom dead center, loosen the nut, adjust the nut, and try to pull the two ends of the thin paper by hand The degree of compaction until approximately equal. After the adjustment, the nuts must be tightened to prevent loosening.
6. Active light-controlled feeding equipment: This equipment is composed of a servo motor, a feeding rubber roller, a light-controlled shutter, a blind, a photoelectric tracking machine and an electric control line. Its function is to insist on normal film feeding during the production process. When the machine is working, when the film feeding speed is too fast and the light-controlled ray is blocked, the equipment will issue an instruction to make the motor stop rolling feeding.
Preparation materialsedit
1. Varieties of plastic bags
(1) High pressure polyethylene plastic bag
Plastic film paper bag machine
Plastic film paper bag machine
(2) Low-pressure polyethylene plastic bags
(3) Polypropylene plastic bag
(4) Polyvinyl chloride plastic bag
2. The use of plastic bags
(1) Uses of high-pressure polyethylene plastic bags:
A. Food packaging: pastries, sugar cubes, roasted seeds and nuts, biscuits, milk powder, salt, tea, etc.;
B. Fiber packaging: shirts, clothing, knitted cotton products, chemical fiber products;
C. Daily chemical products packaging.
(2) Uses of low-pressure polyethylene plastic bags:
A. Garbage bags, bacterial seed bags;
B. Convenient bags, shopping bags, handbags, vest bags;
C. Fresh-keeping bag;
D. Woven bag inner bag
(3) Uses of polypropylene plastic bags:
Mainly used for packaging textiles, knitted cotton products, clothing, shirts, etc.
(4) Uses of PVC plastic bags:
A. Gift bags;
B. Luggage bags, needle cotton packaging bags, cosmetic packaging bags;
C. (Zipper type) document bag and information bag.
Second, the composition of plastic
The plastic we usually use is not a pure substance, it is made of many materials. Among them, high molecular polymer (or synthetic resin) is the primary component of plastics. In addition, in order to improve the function of plastics, various auxiliary materials should be added to the polymer, such as fillers, plasticizers, lubricants, stabilizers, Colorants, etc., can become successful with good plastics.
1. Synthetic resin
Paper bag machine
Paper bag machine (4 sheets)
Synthetic resin is the most important component of plastics, and its content in plastics is usually 40% to 100%. Because the content is large, and the nature of the resin often determines the nature of the plastic, everyone often regards the resin as a synonym for plastic. For example, compare polyvinyl chloride resin with polyvinyl chloride plastics, and phenolic resins with phenolic plastics. Originally, resin and plastic are two different concepts. Resin is an unprocessed initial polymer. It is not only used to make plastics, but also a material for coatings, adhesives, and synthetic fibers. In addition to a small part of plastics containing 100% resin, most plastics require other substances in addition to the primary component resin.
2. Packing
Fillers are also called fillers, which can improve the strength and heat resistance of plastics and reduce costs. For example, the use of wood powder in phenolic resin can greatly reduce the cost and make phenolic plastic one of the cheapest plastics. At the same time, it can also significantly improve the mechanical strength. Fillers can be divided into two types: organic fillers and inorganic fillers, the former such as wood flour, rags, paper and various fabric fibers, and the latter such as glass fiber, diatomaceous earth, asbestos, and carbon black.
3. Plasticizer
Plasticizers can increase the plasticity and flexibility of plastics, reduce brittleness, and make plastics easier to process and shape. Plasticizers are usually high-boiling organic compounds that are miscible with resin, non-toxic, odorless, stable to light and heat, and phthalate esters are the most commonly used. For example, when producing polyvinyl chloride plastics, if you add more plasticizers, you can get soft polyvinyl chloride plastics. If you do not add or add less plasticizers (amount <10%), you get hard polyvinyl chloride plastics. .
4. Stabilizer
In order to prevent the synthetic resin from being differentiated and damaged by the effects of light and heat during processing and use, and to extend the service life, it is necessary to add stabilizers in the plastic guess. Commonly used are stearate and epoxy resin.
5. Coloring agent
The colorant can make the plastic have various gorgeous and beautiful colors. Commonly used organic dyes and inorganic pigments as colorants 6, lubricants
The effect of the lubricant is to prevent the plastic from sticking to the metal mold during molding, and at the same time, it can make the plastic appearance lubricious and beautiful. Commonly used lubricants include stearic acid and its calcium and magnesium salts.

In addition to the above additives, SPC can also add flame retardants, foaming agents, antistatic agents, etc. to meet different application requirements.