As the name suggests, the square bottom machine is used to bond the bottom of the paper bag to the whole through a certain hot pressing or gluing process. We often use various paper bags in our daily life, but few people understand the working principle and working process of this bag making machine.

The working principle of the square bottom machine

1. Silo discharge mechanism

The apparatus includes a rack. The frame is provided with a turntable, a turntable, a paper suction assembly arranged on the turntable, a silo, and a discharging mechanism; the silo and the discharging mechanism are arranged on both sides above the frame, and the silo and the discharging mechanism are located on the rotation path of the turntable. ; The turntable includes a disc body at both ends and a mandrel connecting the two disc bodies.

2. Paper suction device

The paper suction assembly is rotatably installed on two disc bodies of the turntable, one of the disc bodies is provided with a transmission mechanism for driving the rotation of the paper suction assembly, and the other disc body is provided with a gas distribution mechanism for distributing air to the paper suction assembly; the paper suction assembly It includes a hollow shaft, the hollow shaft is rotatably arranged on the two disc bodies of the turntable, and a number of paper suction wheels are sleeved on the hollow shaft.

The suction wheel is provided with a hollow rod body; the hollow rod body is provided with suction cups arranged along its length direction, the suction cups are connected with the hollow rod body, the hollow rod body is communicated with the hollow shaft, and the hollow shaft is connected with the negative pressure device through the air distribution mechanism.

3. Insert the valve port paper into the valve port device

After the feeding device has finished arranging the stacked paper bags neatly and then inhaling and feeding, the bottom gluing machine will automatically fold and indent the paper bags in half, insert the valve paper into the valve device, and paste the patch on the paper bag. The strong bar is complete.

The working process of the square bottom machine

1. Half-fold indentation

Specifically, fold the rectangular strip of paper in half along the vertical line of the long side, and glue the wide sides. A paper bag with front and rear openings is obtained; a transverse indentation is pressed at both ends of the paper bag, and the two diagonal indentations are mirror images of each other, and the two are at 45° to the transverse indentation.

2. The bag mouth is folded into a back cover structure

Open the mouth of the bag along the extruded horizontal indentation, and then fold the two sides of the bag mouth inward with the two oblique indentations on the left and right; press the second lateral indentation on the inside of the paper bag, and move inward along the indentation Fold over, and then glue the back cover or heat-pressed structural back cover to get the finished paper bag.

The above is the introduction of the working principle and working process of the bottom paste machine. The high-speed automatic valve port bottom paste paper bag production equipment technology developed by our company is used for packaging cement, mortar, chemical products, flour, mineral powder and other particles. The packaging products of powdered and powdered materials are exported overseas.

As the name suggests, the valve bag packaging machine is used to produce valve bags. Generally speaking, the main operating procedures are mainly divided into two parts, namely pre-production inspection and packaging. If you are familiar with these two parts, you will be familiar with how to operate, but during operation, Some things need to be paid attention to, otherwise problems are prone to occur.

1. Check

(1) Check that the selector switch is in the manual position before power-on;

(2) After power-on, observe that the weighing instrument is at the normal zero position;

(3) Check that the pressure of the control gas source is 0.5mpa, and the pressure of the fluidizing gas source is 0.05mpa.

2. Packaging

The selector switch is switched to the automatic position, the packaging bag is clamped, and the packaging machine automatically completes the following functions: opening the feeding butterfly valve → closing the feeding butterfly valve → start of fluidized discharge → end of fluidized discharge → lift up the bag clamping cylinder → turn over the bag → Next cycle.

Manual: for manual discharge and reset;

Automatic: normal packing;

Clearance: used in the last few packs or when the material is blocked;

The meaning of the indicator light:

(1) The feeding indicator light is on, indicating that the feeding butterfly valve has been opened, and the material enters the fluidization bin of the valve bag packaging machine from the large silo.

(2) The discharge indicator light is on, indicating that the feeding butterfly valve has been closed, the fluidization valve and the fast and slow discharge valve have been opened, and the material enters the packaging bag from the fluidization bin.

3. Precautions

(1) When there are unexpected situations such as material spraying and hand clamping, please press the emergency stop switch quickly, and the packaging machine will cut off the power supply;

(2) Cover the packaging bag as required, and the bag head should completely press the packaging bag after clamping the bag to avoid material spraying;

(3) When the automatic bag turning is unsuccessful, you can directly press “manual bag turning” to assist;

(4) If it is found that the feeding butterfly valve does not close all the time when feeding, it means that there is no material in the large silo, please switch to the clearance mode to pack the next few packages of materials;

(5) When packaging in automatic mode, if there is swelling bag and large dust in the packaging bag, please adjust the pressure of the fluidizing gas source appropriately; when packaging in automatic mode, if there is slow discharge and blocking, please adjust the pressure of the fluidizing gas source appropriately. The source pressure or the stroke of the slow discharge cylinder should be appropriately increased; when the packaging bag is seriously swollen in the clearance mode, it means that the material in the fluidized warehouse has been emptied;

(6) Before leaving get off work every day, clean up the residual materials in the fluidized warehouse and the dust on the scale body, switch the selector switch to manual mode, and press the emergency stop switch to cut off the power supply.

The above is all about the operation of the valve bag packaging machine. In the daily operation process, you must strictly abide by the corresponding operating rules, otherwise it is easy to cause machine failure.

The square bottom machine is mainly a bag making equipment used to produce valve bags made of kraft paper. It is mostly used to produce a square bottom valve bag, such as packing cement, mortar, grain and other granular live powder materials. It can complete 60-120 valve pocket bottom paste work per minute. Let’s take a detailed look at the production process of the square bottom machine.

1. The structure of the square bottom machine

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(1) The steel plate of the main engine head adopts 45# steel plate with a thickness of 40mm;
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(2) The structure of the discharging component adopts 12mm thick steel plate, and the surface is treated with 3 layers of paint;
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(3) 120# channel steel is used for the intermediate support;
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(4) The coil unwinding unit adopts air-expanded shaft core: 4 sets (45# steel; the surface is quenched by this high frequency; the bearing weight is 1.3 tons);

(5) The structure and parts of other mechanical parts are made of 45#, A3, cast iron and so on.

2. Features of square bottom machine

The pressure line and opening can be adjusted online; the valve strip and the internal and external reinforcing strips adopt servo feeding device, which can be adjusted online, and automatically stop feeding when there is no material, saving raw material waste; cutting knife and opening device, no consumables, no need to replace the rubber. With man-machine interface adjustment (touch screen), frequency conversion speed regulation, high-precision servo control system, PLC programming control system, automatic counting, output and so on.

The control system is simple and convenient to operate: automatic stop of the coil machine; automatic color mark tracking function; automatic gluing; forming;

3. The production process of the square bottom machine

The square bottom machine is an integrated linkage production line, which can make the bottom of the bag at both ends and the valve port pasted at one time. It consists of rotary automatic feeding, arranging and positioning system, finishing and imprinting system, bag bottom forming system, bag drum transmission system, opening and shaping station, double-layer valve sheet production and automatic glue application, and bag bottom reinforcing paper strip , bag bottom turning station, large S-shaped walking route into bag compression and clamping output system, intermittent counting and finishing system and electrical control system.

Its technological process includes: unwinding, automatic paper feeding and layered guidance, automatic deviation correction, auxiliary traction, virtual cutting, hot pressing, bag tube forming, traction, piercing and venting, tearing, and separating bag feeding (bag tube conveying, The bottom of the bag is opened), the valve strip is pasted, the glue is automatically applied, the bottom is formed and the bottom is turned, the bottom of the bag is turned over, the counting is grouped, and the stacking is performed.

The above is the introduction of the production process of the square bottom machine. The main function of the square bottom machine is to cooperate with the paper tube machine to produce valve pockets. We Huatian have rich experience in the production of square bottom machine and paper tube machine.

Valve bags are now widely used in our lives, and they are used in different industries. The characteristics of valve pockets are convenient transportation of goods, strong firmness, improved packaging efficiency, low damage rate, and there are many types of valve pockets. The machine manufacturer will now explain to you what are the classifications of valve pockets? Let’s keep reading.

Classification of valve bags

1. Multi-layer kraft paper bag: use two or more layers of kraft paper for further processing on the machine, make it into a bag shape, use polyester thread to reinforce and sew the bottom, and then use heat-sealing paper for heat-sealing treatment .

2. Paper-plastic composite bag: It is also a three-in-one kraft paper bag. The outer layer of the paper bag is kraft paper, and the inner layer of the paper bag is a plastic PP woven bag. EVA, PP, PE and other raw materials are used for high-temperature composite treatment. After completion, according to different Kind of material for one-step bottom treatment.

3. Square bottom open bag: It is basically the same as the multi-layer kraft paper bag. After the semi-finished product is made on the machine, the bottom is manually folded to make a square bottom. The bottom is glued with glue, and then dried by heat sealing or drying. Type processing, complete the production of open bags.

4. Square bottom valve bag: The basic production process is the same as that of the square bottom open bag. The square bottom valve bag is made by a square bottom machine. The valve bag has the same treatment on the mouth and bottom, and at the same time adds a kind of horn to the mouth. mouth, convenient for filling materials.
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5. PE valve bag: It is what we call the heavy bag valve bag, which is made of polyethylene film, and the thickness of the film is generally between 8-20 silk.
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6. Low melting point valve bag: mainly made of low melting point polyethylene film, the thickness of the film is generally between 8-20 filaments, suitable for large-scale production and use of chemical enterprises on the assembly line, reducing pollution and reducing labor costs labor intensity.
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Through the above, the classification of valve pockets has been introduced in detail. According to different materials, they are used in different industries. All in all, it is convenient for everyone.

With the in-depth advancement of industrial automation, valve pockets are more and more used in the packaging of various industrial products, such as: grain, cement, lime, fertilizer raw materials, and chemical products. Because of its good sealing and moisture resistance, it is deeply loved by users. The following bag making machine manufacturers will give you a detailed introduction to the performance and advantages of valve bag making machines.

Performance of valve bag making machine

1. Mechanical properties

The glue-free hot-pressing process seals firmly and safely, and the entire bag body is evenly stressed in the event of a drop, avoiding the weak link of the sewing pinhole of the sewing bottom bag. At the same time, the valve bag is conveyed by the permanent magnet chain in the bag making machine, which will not damage the bag body, and the position is accurate during transportation. By rationally setting the punching device, the bottom seal of the bag and the valve mouth piece are bonded to each other, and the valve mouth edge is firmer, which can ensure that the high-speed filling bag is more stable, and the quality and yield of the valve bag production are ensured.

2. Use performance

(1) Good sealing: Use the bag tube with film to ensure the sealing of the bag body. At the same time, there is no needle stick during the processing, and the leakage of powder is not easy to occur after filling.

(2) The valve pocket is characterized in that it is automatically closed after the valve port is filled, and the degree of closure is high. If necessary, it can be tightened by hot air pliers to achieve the degree of tight closure. After filling, there is no leakage, and it is clean and beautiful. , Surface packaging without adhesive turbidity or other stains.

3. Automation performance

(1) Equipped with a double-roller micro-hole punching device, when powder products such as cement are filled at high speed, the fine micro-holes can ensure that the air in the bag can be quickly discharged to achieve higher efficiency filling. And because the micropores are fine. Coupled with the configuration of the two-way microporous roller, the leakage of the powder filling can be avoided, and a good waterproof and moisture-proof effect can be achieved.

(2) The valve pocket is in the shape of a rectangular parallelepiped brick after filling, with neat stacking and high stacking layers, which is convenient for transportation and mechanized loading and unloading and storage.

(3) The valve port of the valve pocket can be used for manual bag insertion or mechanized line filling of automatic bag insertion. Even when filling powdery materials with high requirements such as cement, the speed of the automatic bag filling machine can also reach 5600 bags in 1 hour, greatly improving the production efficiency.

4. Low cost

(1) Square bottom valve pockets are produced without expensive adhesives or sewing threads.

(2) The product quality is high, the scrap rate is low, and raw materials are saved to a large extent.

(3) Only one operator and two auxiliary personnel are required to operate one machine per shift, which can save a lot of labor and reduce production management costs compared with the production of bottom-seam bags. In particular, the low consumption of raw materials and the absence of adhesives greatly reduce the production cost.

The above is the introduction about the performance of the valve pocket bag making machine, I hope it will be helpful to you. In addition, with the wide application of valve pockets in the market, the demand for bag making machines that produce valve pockets has gradually increased. We have rich experience in the production of valve bag making machines, square bottom machines, and paper tube machines. Welcome if you need it. Call to inquire.