China's corrugated box industry is entering a period of rapid development and adjustment. On the one hand, the production capacity is continuously expanding, and the equipment is continuously updated. As a result, the production lines of a large number of low-speed guide jaw single-faced machines are facing complete elimination or technological transformation. At the same time, the vast majority of E and F, G and other small and micro-corrugated cardboard manufacturing, mainly in the form of single-sided machine two-layer plate type, which in turn guide claw-type majority. On the other hand, a large number of small carton factories still rely mainly on guide claw type single-sided machines.
The guide claw type single-sided machine generally has a running speed of only about 30 to 40 M/min, a low production efficiency, a high paper waste rejection rate, and a large energy consumption. Therefore, the production cost is high (the production of a micro cardboard is particularly prominent). However, due to its small investment and rapid production, the current China's single-sided claw-type machine still has a considerable amount of possession.
With the rapid development of corrugated board production technology, in order to meet the production conditions of single-sided machines, and to adapt to the production of wide-width, high-speed and various corrugated-type conditions, the structural improvement of corrugated cardboard single-sided machines is continuously innovating, and corrugated paper is under development. The positioning method on the corrugating roll has been developed from the mechanical guide jaw type to the currently widely used cover-type vacuum adsorption, air-cushion positive pressure, and vacuum suction type, etc. (see FIGS. 1, 2, and 3). The cover vacuum suction (also known as the external suction type) is widely used due to its simple structure, strong adaptability, low manufacturing cost, and reliable operation. Its easy-to-renovate and short-cycle features make it the preferred choice for single-sided machine rebuilds.
The cover-type vacuum adsorption and reformation of the guide claw type single-faced machine is being applied more and more widely. It has become one of the preferred options for the carton plant to improve quality, improve efficiency, and increase efficiency, which is low in cost and quick in efficiency. The readers are familiar with the working principle of the old-fashioned guide jaw type single-faced machine, so we will focus on the principles and contents of the cover-type vacuum absorption reformation in the following article.
Outer cover vacuum adsorption working principle:
Outer cover vacuum adsorption consists of suction hood, paper guide copper, suction tube, damper, high pressure suction fan and muffler (see Figure 1). The suction vacuum groove is uniformly distributed on the roller surface of the lower corrugated roller. The high-pressure blower blows the air through the suction pipe and causes a negative pressure between the inner cavity of the suction hood and the lower corrugating roller to pass through the lower corrugating roller. The suction groove makes the formed corrugated paper tightly adhered to the lower corrugating roller, accurately completes the gluing and compounding process, and then is a paper guide copper sheet installed on the suction hood and extending into the suction groove of the lower corrugating roller. The composite dry two-layer corrugated board is guided out from the lower corrugating roller, during which the damper can be adjusted to control the suction volume, and the muffler can reduce the noise of the suction airflow. Replacing different types of corrugating rollers can produce various types of two-layer corrugated cardboard.
Outer cover type vacuum absorption adopts the principle of vacuum negative pressure to position the formed corrugated paper, eliminating the positioning instability caused by the mechanical wear of the guide jaw type structure, which is sufficient for high speed operation. Especially for miniature corrugated cardboard, the corrugated paper after molding has low strength, is easy to deform, and is not suitable for positioning. At present, the vacuum absorbing or air cushion positive pressure is only used in the world to adapt to high speed operation. We have successfully reconstructed the domestic first 1.6M format F-type (楞0.75) and 1.25M G-type (楞0.55) miniature corrugated outer suction single-sided machines for high-end color box packaging. The high-quality micro-corrugated cardboard has achieved very good results, which is difficult to achieve with the guide jaw type single-sided machine. When the product paper format is only 50% of the corrugating roll nominal format, it can also run normally and steadily, which fully demonstrates the good working performance of the cover vacuum adsorption.
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Figure (1) Cover Vacuum Adsorption
1 - Upper corrugating roller
2 - suction tube
3 - Suction hood negative pressure chamber
4 - Lower corrugating roller
5 - Copper paper guide
6 - Pressure roller
7 - Lower preheat roll
8 - Preheat 2 rolls
9 - Coated roller
10-shaped roller
11-slurry
12-Plate
13- Paper guide roller
14-up preheat roll
15-High pressure fan
16-Muffler (Wujin Haili Roller Co., Ltd.)
Corrugated cardboard single-sided machine cover vacuum adsorption reform content:
1, new external suction corrugated roller. The outer suction hood is mounted on the lower corrugating roller, and a suction slot distributed at a certain distance is processed on the roller surface of the lower tile roller. The upper corrugating roller has no groove, and the original corrugating roller is eliminated.
2. A new system of rubberized rollers. The guide plate grooves on the original rubberizing roller will affect the quality of the composite. The new rubberized roller has no groove.
3, according to the specifications of single-sided machine and corrugated roller design and manufacture of suction hood device, paper guide copper plate device and installation of fixed devices.
4. According to the actual structural position of the single-side machine and the surrounding environment, design the direction of the suction duct, determine the position of the high-pressure fan, and manufacture the suction duct system and high-pressure fan bracket.
5, according to the corrugating roller specifications selected matching high pressure blower and muffler. Design electrical controls.
Corrugated cardboard single-sided machine cover vacuum adsorption modification program:
1. On-site survey and verification of the relevant dimensions and technical parameters of single-sided machines and corrugated rollers.
2. On-site design of pipeline orientation and location of high pressure fans.
3. Identify other modifications and repairs that must be added.
4. Professional company production (General production time does not exceed the production cycle of the new system corrugated roller).
5. On-site reconstruction installation and commissioning (In general, 2 days, some new repair items can be removed and sent to a professional company for repair).
The entire renovation process requires only a few hours of downtime during on-site surveying and two days of downtime during installation and commissioning, with little impact on production. If the supply and demand parties have a thorough and coordinated arrangement, the downtime can also be shortened.
Other content of renovation and repair projects that must be added:
Because most of the single-sided machines that need to be rebuilt are old machines, and many parts have worn out and need to be repaired, replenished and updated, it may be necessary to add other alterations and repairs. (Checked by the engineering and technical personnel of a professional company)
1. After the pressure roller is worn out, it is repaired. 2. After the rubber roller is worn out, it is repaired. 3. A new gear is required after the wear of a pair of transmission gears on the lower corrugating roller and pressure roller. (This item is not included in the transmission and universal joint transmission.)
4. Repair, replacement and replenishment of components of bearings, oil seals, sprockets, cylinders, and other transmissions, pneumatics, seals, and mechanical parts 5. Restructuring, replenishment, replacement, and repair of electrical control parts.
The corrugated cardboard single-sided machine's cover-type vacuum adsorption reformation has the advantages of economical cost, mature and reliable technology, short rebuilding period, and small impact of stopping production. It is widely used in the carton industry.
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Figure (2) positive pressure air cushion
1-on preheat roll
2-pressure roller
3-paper guide roller
4- Upper corrugating roller
5-lower corrugating roller
6-lower transfer roller
7-Coating roller
8-slurry
9-uniform roller
10-housing
11-Air cushion positive pressure chamber
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Figure (3) Vacuum Internal Adsorption
1- Upper corrugating roller
2- Suction hole
3- suction slot
4-lower corrugating roller
5- Pressure roller
6- Lower Preheat Roller 1
7- Lower Preheat Roller 2
8-coating roller
9-uniform roller
10-slurry
11-Plate
12- suction hood
13- Negative pressure chamber
14-fan 15 - muffler 16 - paper guide roll 17 - upper preheat roll
The guide claw type single-sided machine generally has a running speed of only about 30 to 40 M/min, a low production efficiency, a high paper waste rejection rate, and a large energy consumption. Therefore, the production cost is high (the production of a micro cardboard is particularly prominent). However, due to its small investment and rapid production, the current China's single-sided claw-type machine still has a considerable amount of possession.
With the rapid development of corrugated board production technology, in order to meet the production conditions of single-sided machines, and to adapt to the production of wide-width, high-speed and various corrugated-type conditions, the structural improvement of corrugated cardboard single-sided machines is continuously innovating, and corrugated paper is under development. The positioning method on the corrugating roll has been developed from the mechanical guide jaw type to the currently widely used cover-type vacuum adsorption, air-cushion positive pressure, and vacuum suction type, etc. (see FIGS. 1, 2, and 3). The cover vacuum suction (also known as the external suction type) is widely used due to its simple structure, strong adaptability, low manufacturing cost, and reliable operation. Its easy-to-renovate and short-cycle features make it the preferred choice for single-sided machine rebuilds.
The cover-type vacuum adsorption and reformation of the guide claw type single-faced machine is being applied more and more widely. It has become one of the preferred options for the carton plant to improve quality, improve efficiency, and increase efficiency, which is low in cost and quick in efficiency. The readers are familiar with the working principle of the old-fashioned guide jaw type single-faced machine, so we will focus on the principles and contents of the cover-type vacuum absorption reformation in the following article.
Outer cover vacuum adsorption working principle:
Outer cover vacuum adsorption consists of suction hood, paper guide copper, suction tube, damper, high pressure suction fan and muffler (see Figure 1). The suction vacuum groove is uniformly distributed on the roller surface of the lower corrugated roller. The high-pressure blower blows the air through the suction pipe and causes a negative pressure between the inner cavity of the suction hood and the lower corrugating roller to pass through the lower corrugating roller. The suction groove makes the formed corrugated paper tightly adhered to the lower corrugating roller, accurately completes the gluing and compounding process, and then is a paper guide copper sheet installed on the suction hood and extending into the suction groove of the lower corrugating roller. The composite dry two-layer corrugated board is guided out from the lower corrugating roller, during which the damper can be adjusted to control the suction volume, and the muffler can reduce the noise of the suction airflow. Replacing different types of corrugating rollers can produce various types of two-layer corrugated cardboard.
Outer cover type vacuum absorption adopts the principle of vacuum negative pressure to position the formed corrugated paper, eliminating the positioning instability caused by the mechanical wear of the guide jaw type structure, which is sufficient for high speed operation. Especially for miniature corrugated cardboard, the corrugated paper after molding has low strength, is easy to deform, and is not suitable for positioning. At present, the vacuum absorbing or air cushion positive pressure is only used in the world to adapt to high speed operation. We have successfully reconstructed the domestic first 1.6M format F-type (楞0.75) and 1.25M G-type (楞0.55) miniature corrugated outer suction single-sided machines for high-end color box packaging. The high-quality micro-corrugated cardboard has achieved very good results, which is difficult to achieve with the guide jaw type single-sided machine. When the product paper format is only 50% of the corrugating roll nominal format, it can also run normally and steadily, which fully demonstrates the good working performance of the cover vacuum adsorption.
1 - Upper corrugating roller
2 - suction tube
3 - Suction hood negative pressure chamber
4 - Lower corrugating roller
5 - Copper paper guide
6 - Pressure roller
7 - Lower preheat roll
8 - Preheat 2 rolls
9 - Coated roller
10-shaped roller
11-slurry
12-Plate
13- Paper guide roller
14-up preheat roll
15-High pressure fan
16-Muffler (Wujin Haili Roller Co., Ltd.)
Corrugated cardboard single-sided machine cover vacuum adsorption reform content:
1, new external suction corrugated roller. The outer suction hood is mounted on the lower corrugating roller, and a suction slot distributed at a certain distance is processed on the roller surface of the lower tile roller. The upper corrugating roller has no groove, and the original corrugating roller is eliminated.
2. A new system of rubberized rollers. The guide plate grooves on the original rubberizing roller will affect the quality of the composite. The new rubberized roller has no groove.
3, according to the specifications of single-sided machine and corrugated roller design and manufacture of suction hood device, paper guide copper plate device and installation of fixed devices.
4. According to the actual structural position of the single-side machine and the surrounding environment, design the direction of the suction duct, determine the position of the high-pressure fan, and manufacture the suction duct system and high-pressure fan bracket.
5, according to the corrugating roller specifications selected matching high pressure blower and muffler. Design electrical controls.
Corrugated cardboard single-sided machine cover vacuum adsorption modification program:
1. On-site survey and verification of the relevant dimensions and technical parameters of single-sided machines and corrugated rollers.
2. On-site design of pipeline orientation and location of high pressure fans.
3. Identify other modifications and repairs that must be added.
4. Professional company production (General production time does not exceed the production cycle of the new system corrugated roller).
5. On-site reconstruction installation and commissioning (In general, 2 days, some new repair items can be removed and sent to a professional company for repair).
The entire renovation process requires only a few hours of downtime during on-site surveying and two days of downtime during installation and commissioning, with little impact on production. If the supply and demand parties have a thorough and coordinated arrangement, the downtime can also be shortened.
Other content of renovation and repair projects that must be added:
Because most of the single-sided machines that need to be rebuilt are old machines, and many parts have worn out and need to be repaired, replenished and updated, it may be necessary to add other alterations and repairs. (Checked by the engineering and technical personnel of a professional company)
1. After the pressure roller is worn out, it is repaired. 2. After the rubber roller is worn out, it is repaired. 3. A new gear is required after the wear of a pair of transmission gears on the lower corrugating roller and pressure roller. (This item is not included in the transmission and universal joint transmission.)
4. Repair, replacement and replenishment of components of bearings, oil seals, sprockets, cylinders, and other transmissions, pneumatics, seals, and mechanical parts 5. Restructuring, replenishment, replacement, and repair of electrical control parts.
The corrugated cardboard single-sided machine's cover-type vacuum adsorption reformation has the advantages of economical cost, mature and reliable technology, short rebuilding period, and small impact of stopping production. It is widely used in the carton industry.
1-on preheat roll
2-pressure roller
3-paper guide roller
4- Upper corrugating roller
5-lower corrugating roller
6-lower transfer roller
7-Coating roller
8-slurry
9-uniform roller
10-housing
11-Air cushion positive pressure chamber
1- Upper corrugating roller
2- Suction hole
3- suction slot
4-lower corrugating roller
5- Pressure roller
6- Lower Preheat Roller 1
7- Lower Preheat Roller 2
8-coating roller
9-uniform roller
10-slurry
11-Plate
12- suction hood
13- Negative pressure chamber
14-fan 15 - muffler 16 - paper guide roll 17 - upper preheat roll