CN114619707B - Speed ratio bag making machine - Google Patents
Speed ratio bag making machine Download PDFInfo
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- CN114619707B CN114619707B CN202210269738.2A CN202210269738A CN114619707B CN 114619707 B CN114619707 B CN 114619707B CN 202210269738 A CN202210269738 A CN 202210269738A CN 114619707 B CN114619707 B CN 114619707B
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- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 230000033001 locomotion Effects 0.000 claims abstract description 16
- 230000033764 rhythmic process Effects 0.000 claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 8
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 8
- 238000010409 ironing Methods 0.000 abstract description 10
- 239000012775 heat-sealing material Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 238000007731 hot pressing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000009459 flexible packaging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/04—Feeding sheets or blanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
- B31B70/20—Cutting sheets or blanks
Landscapes
- Making Paper Articles (AREA)
Abstract
The invention discloses a speed ratio bag making machine. The present invention includes a heat-seal land for the low-speed portion and a cut-out land for the high-speed portion. The cutting area comprises a third traction roller, a fourth traction roller, a material storage roller, an adjusting roller and a cutter, the material storage roller is arranged between the second traction roller and the third traction roller, the adjusting roller is arranged between the third traction roller and the fourth traction roller, and the cutter is positioned behind the fourth traction roller; the ratio of the up-and-down movement rhythm of the cutter in the cutting area to the heat-sealing up-and-down movement rhythm of the heat-sealing area is 2-n: 1, and the length ratio of the single-time traction material in the heat-sealing area to the single-time traction material in the cutting area is 2-n: 1. The invention utilizes the mutual combination of electric control and mechanical structure, and provides a mode of forming multiple frequencies by front and rear sections of asynchronous traction, cutter and ironing pressure under the condition that the running linear speed of the heat-sealing material is kept the same, thereby reducing the running speed of the dragging part of the main machine and reducing impact and abrasion on the premise of improving the cutting speed.
Description
Technical Field
The invention relates to the field of bag making equipment on a flexible package production line, in particular to a speed ratio bag making machine.
Background
In the flexible packaging industry, the existing bag making equipment, no matter a 600-type three-edge sealing bag or a 350-type middle sealing bag making machine, is to spread a coiled heat-sealing material (such as a plastic film) through a continuous feeding mechanism and feed a swing roller for transition, and then enter a middle heat-sealing hot-pressing part; according to the characteristics of the made bag shape, a plurality of groups of traction materials (horizontal movement) are matched with a mechanical structure (vertical movement) for longitudinal heat sealing and transverse heat sealing to form, and finally, a cutting knife executes a cutting function to realize the processing of a finished bag.
The structure of the existing bag making machine is shown in fig. 1a and 1b, a heat-sealing material 1 firstly enters a first drawing roller 7-1 through the hot pressing of a longitudinal heat seal 2, then enters the hot pressing of a transverse heat seal 3 through a synchronous floating roller 6, then reaches a second drawing roller 7-2, and finally is cut by a cutter 8 to be made into individual bags.
According to the bag making machine shown in fig. 1a and 1b, in order to adapt to the characteristics that the film material is elastic and easy to stretch and deform and the phenomenon that the slip is easy to generate due to small friction coefficient during traction, servo traction is mostly adopted; the intermittent motion mode is that the heat-sealing material is horizontally moved forward and the host drives the up-and-down motion of heat-sealing ironing to be combined. The duty ratio of the traction and the ironing is 50 percent respectively, so that parameters such as ironing pressure, heating temperature, traction tension and the like are kept relatively stable during heat synthesis molding, the disturbance of the factors is reduced, and the yield of the bag is ensured.
Based on the above traditional mechanical structure, the currently mainstream bag making machine operates and is stably used well when the highest beat is 200 times/min. However, in order to improve the production efficiency of enterprises and reduce the use cost of personnel, the equipment developed in the future is expected to operate at a speed of at least 300 times/min. At present, a plurality of high-speed bag making devices are tried out and popularized by users (such as a WSD600B + type high-speed bag making machine of Huiyun City Fuyinjiao packaging machinery Co., Ltd.), and all of the devices are products continuously utilizing the original design technology, namely, the mechanical structure device shown in FIGS. 1a and 1 b. Obviously, when the whole machine reaches 300 times/minute, the speed of a main motor driving the transverse sealing heat sealing and the longitudinal sealing heat sealing (such as the rated rotating speed of 3000 revolutions/minute and the speed ratio of 1: 8) can be operated at 2400 revolutions/minute; the motion striking between the sword group that scalds about, the mechanical wear of transmission part and bearing etc. department, the friction between rubber roll, the deflector roll during drawing is all very serious, is in anti fatigue test always just as equipment, is very big unfavorable to mechanical durability.
Meanwhile, in order to ensure the bag making quality and ensure that the firmness and the appearance of the bag are not changed, the whole machine is accelerated by using the original design, and the performance (such as thickness and rigidity) of mechanical materials or the number of hot knife sets is inevitably required to be enhanced to meet the hot pressing strength and the hot pressing time; the inertia of the whole equipment, particularly the ironing set under high-speed up-and-down impact is increased, and the noise is increased; the horizontal traction time of the whole machine in high-speed operation is shortened, the difficulty of material tension control is also improved by frequently starting and stopping the driving part at a high speed, the stretching and slipping of the film are also serious, and the finished product rate of the bag is reduced.
In addition, the bag making machine which runs at the speed of less than 200 times/minute is suitable and controllable in cost compared with a matched electric system, such as a servo for dragging the hot knife to move or pulling the film. However, when the speed reaches more than 300 times/min, the driving power of each link of the electric system is increased to double the manufacturing cost, the speed of the whole machine is increased, materials and parts of a transmission part meet high performance indexes such as wear resistance and heat resistance, and the market popularization or practicability is obviously insufficient.
Disclosure of Invention
The invention provides a speed ratio bag making machine aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a speed ratio bag machine includes a heat seal area for a low speed portion and a cutting area for a high speed portion.
The heat-sealing area comprises a first traction roller, a second traction roller, and transverse heat sealing and longitudinal heat sealing which are arranged between the first traction roller and the second traction roller;
the cutting area comprises a third traction roller, a fourth traction roller, a material storage roller, an adjusting roller and a cutter, the material storage roller is arranged between the second traction roller and the third traction roller, the adjusting roller is arranged between the third traction roller and the fourth traction roller, and the cutter is positioned behind the fourth traction roller;
the ratio of the up-and-down movement rhythm of the cutter in the cutting area to the heat-sealing up-and-down movement rhythm of the heat-sealing area is 2-n: 1, the length ratio of the single-time traction material in the heat-sealing area to the single-time traction material in the cutting area is 2-n: 1, and n is a positive integer greater than 2.
Further, the device also comprises a synchronous floating roller arranged between the first traction roller and the transverse heat seal, wherein the synchronous floating roller is provided with a first position sensor and is used for compensating the traction distance of the first traction roller.
Furthermore, a first positioning sensor is arranged between the transverse heat seal and the second drawing roller and is used for compensating the drawing distance of the second drawing roller.
Furthermore, the adjusting roller is provided with a second position sensor which is used for compensating the traction distance of the third traction roller.
Furthermore, a second positioning sensor is arranged between the adjusting roller and the cutter and is used for ensuring the cutting length of the cutter.
Further, the maximum value of n is 20.
The invention has the beneficial effects that: the invention utilizes the mutual combination of electric control and mechanical structure, and provides a mode of forming multiple frequencies by front and rear sections of asynchronous traction, cutter and ironing pressure under the condition that the running linear speed of the heat-sealing material is kept the same, thereby reducing the running speed of the dragging part of the main machine and reducing impact and abrasion on the premise of improving the cutting speed. The top speed of 300 times/min and the forward-backward speed ratio of 2:1 are taken as examples, the front section cutter is operated at 300 times/min, and the rear section main machine for controlling the heat sealing part is operated at 300 × 1/2=150 times/min. Not only greatly reducing mechanical impact and abrasion, but also prolonging the service life of the whole machine; meanwhile, the electromechanical cost of producing high-speed bag making equipment is saved, and the upgrading and the reconstruction of the existing equipment below 200 times/minute are facilitated, so that the economic benefit and the social benefit generated by the invention are obvious, and the method is worthy of being widely popularized in the light industrial packaging industry.
Drawings
FIG. 1a is a three-dimensional schematic view of a mechanical structure of a conventional bag making machine;
FIG. 1b is a two-dimensional schematic view of a mechanical structure of a conventional bag machine;
FIG. 2a is a three-dimensional schematic view of the mechanical structure of the bag machine of the present invention;
FIG. 2b is a two-dimensional schematic view of the mechanical structure of the bag machine of the present invention;
FIG. 3a is a graph showing the relationship between the pulling action of the fourth pulling roll and the pulling action of the second pulling roll, wherein the speed ratio is 2: 1;
FIG. 3b is a drawing action relationship curve of the fourth drawing roll and the second drawing roll with a speed ratio of 3: 1.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention realizes high-speed bag making by adding the traction group between the cutting knife and the second traction of the graph 1a and the graph 1b and changing the original action time sequence and the feeding form of the film, thereby providing a structural device for high-speed bag making, namely a speed ratio bag making machine.
As shown in FIGS. 2a and 2b, the machine of the present invention adds a high speed configuration to the original configuration of the back end bag machine (low speed section) using both transverse and longitudinal heat seals, including two sets of draw rolls (third and fourth draw rolls) and two oscillating rolls (stock and dancer rolls), and a position sensor. In the aspect of electrical control, the front section (high-speed section) adopts a traction length of one bag length (counted as L), and the traction frequency is the frequency multiplication frequency (2N, 3N … …) of the rear section (low-speed section); the traction length of the rear section is an integral multiple of one bag length (2L and 3L … … is calculated), the traction frequency is a single frequency (N), namely the total traction length of the front section and the rear section in a certain period is kept equal. The transverse heat sealing and the longitudinal heat sealing driven by the main machine can run up and down in a low-speed state, and meanwhile, the cutter runs up and down in a rhythm of integral multiple of the rear sections of 2:1, 3:1 … … n:1 and the like, and the speed ratio condition of the cutter is consistent with that of corresponding traction. Generally, an integer of N less than or equal to 20 is the best, and the beat refers to the frequency N of movement per minute.
According to the technical conception, the design structure of the invention is as follows:
the third traction roller 7-3, the fourth traction roller 7-4, the second positioning sensor 10-2, the storage roller 11, the adjusting roller 12 and the cutter 8 form a front section (a cutting area of a high-speed part), and the first traction roller 7-1, the second traction roller 7-2, the first positioning sensor 10-1, the transverse heat seal 3, the longitudinal heat seal 2, the main machine M, the synchronous floating roller 6 and other parts form a rear section (a heat sealing area of a low-speed part). Taking the front-rear speed ratio of 2:1 as an example, assuming that the traction length of the rear section is 2L and the tempo is N, the first traction roller and the second traction roller both act according to the tempo of N, and the first traction roller and the second traction roller draw out the length based on 2L each time. In order to reduce the influence of stretching or slipping factors on the material during operation and to keep the tension constant to increase the yield, the first drawing roller comprises a partial compensation function, and a compensation signal comes from a first position sensor 9-1 for detecting the synchronous floating roller, so that the first drawing roller is superposed and compensated on the basis of the set length 2L, and the position of the synchronous floating roller is kept basically unchanged. The distance between 3 boiling hot knife tackle of adjustment horizontal heat-seal is the integral multiple of 2L, and first positioning sensor is responsible for the second carry over pinch rolls according to setting for length 2L and carries out accurate positioning (generally set for length within 1000mm, can be accurate to the back two-bit of decimal point) according to the color mark (for short the color scale) on the film material, makes the film material of dragging out just in time be 2 complete printing width lengths.
The film material after heat sealing passes through the storage roller and then reaches the third traction roller, and then passes through the adjusting roller and then reaches the fourth traction roller and the cutter, thus completing a material feeding route for bag forming. And when the first traction roller and the second traction roller finish the action, the host machine drives the rear section ironing knife to move up and down, so that the rear section ironing knife is in contact with the transverse bottom plate 5 and the longitudinal bottom plate 4 to iron and press the film material. The third pull roll is operated at a substantially constant speed and also includes a partial compensation function, and a compensation signal is sent from a second position sensor 9-2 for detecting the adjustment roll so that the third pull roll adds the compensation speed to the set linear speed (linear speed = length 2L × beat N) to keep the position of the adjustment roll substantially constant. The fourth drawing roll was drawn 2 times as fast as the second drawing roll at 2N times/min and the length of the draw was L. Likewise, the knife action responsible for the cut is 2N times per minute. I.e. the fourth drawing roll completes one drawing and the cutter must complete one cutting, all within a respective 50% duty cycle. The second positioning sensor is responsible for the accurate positioning of the fourth traction roller according to the length L according to the color marks on the film material, so that the drawn film material is 1 complete printing width, namely, exactly one bag is cut each time.
As shown in fig. 3a and 3b, the servo motion curves of the fourth and second rolls are respectively given at speed ratios 2:1 and 3:1, with the abscissa representing the time t and the ordinate representing the pulse frequency f of the servo, corresponding to the servo speed. The area of the shaded portion in the figure is the length of the material dragging of each servo. Taking the front-rear speed ratio of 2:1 as an example, the curve of the second drawing roller (the shaded part is called as a large trapezoid) is marked on the upper half part by 2L/N, the curve of the fourth drawing roller (the shaded part is called as a small trapezoid) is marked on the lower half part by L/2N, and the heights of the large and small trapezoids are consistent. From the two upper and lower graphs, the following relationship can be seen: the length of the base of the large trapezoid is 2 times that of the small trapezoid because the base of the large trapezoid is from the coordinate origin to t1, the base of the small trapezoid is from the coordinate origin to t0, and t0, t1 and t2. Similarly, the length of the upper bottom edge of the large trapezoid is 2 times of that of the small trapezoid, and the heights of the two trapezoids are consistent, so that the area of the large trapezoid is 2 times of that of the small trapezoid, and the length of one-time dragging and discharging of the second traction roller is 2 times of that of the fourth traction roller and is respectively expressed as 2L and L. On the abscissa, during a period of a large trapezoid (from the origin of the coordinates to t 3), the second traction roller stops once, while the fourth traction roller stops 2 times, 2 times the traction, respectively denoted N and 2N, but for a total length of 2L N = L N2N. As can be seen from the time sequence in the figure, the second traction roller and the fourth traction roller start at the origin at the same time, when the second traction roller reaches half the length, the fourth traction roller finishes one traction, and the two tractions have the same length and are L. The second traction roller continues to drag materials, the fourth traction roller enters a stop state, and the cutter (continuously operates all the time and keeps synchronous rhythm) enters a cutting state. When the second traction roller finishes traction and enters a heat-sealing ironing state at the time point of t1 (the second traction roller finishes ironing at the end of the time point of t 3), the fourth traction roller starts traction again, the length L traction is finished at t2, the cutter enters a cutting state at the moment, the two traction rollers from t2 to t3 stop moving, the next period of operation is started at the moment of t3, and the bag making process is repeatedly finished in cycles.
According to the structure and the control mode, the invention not only meets the requirement of high-speed operation of users (trial operation shows that the speed ratio bag making machine has good effect at the beat of 350 times/min), but also adapts to the popularization of the market only with little increase of cost, and ensures that equipment which accounts for less than 99 percent of the bag making machine in the existing plastic color printing factory or film packaging users can give play to the production efficiency of 300 times/min after improvement, so that the practicability is not compared with the bag making machine designed by accelerating the whole machine to 300 times/min according to the prior art.
The invention is finished by using a set of servo motor rotary motion control system with a certain rule and a programmable controller or a singlechip as an inner core, and a sensor for detecting the position correspondingly. Two sets of traction servo and two sets of swing rollers can be added in the original bag making machine (such as SBR-600S type three-side sealing machine of Shanghai Xibier packaging machinery limited company) mechanically to ensure that the tension is changed minimally in the material dragging process, and a set of control software algorithm for the beat distribution movement of the front traction motor, the middle continuous traction motor and the rear traction motor is formed by utilizing the technical concept.
The power source of the invention is a set of corresponding servo motor, matched driver and material conveying device for realizing conversion of different dragging lengths. The invention is not limited by the type of the controller, and a singlechip, a PLC, a motion controller and an industrial personal computer all belong to the scope of the invention, and the bag making mode that the front section and the rear section move in the same frequency times of the L length 2N and the 3N … …, and the middle continuous traction motor and the rear section traction motor move in the same frequency times of the L length 2L and the N frequency times of the 3L … …, and the speed ratio of the front section to the rear section is 2:1, 3:1 … … N:1, is the essence of the invention.
While the preferred embodiments and principles of this invention have been described in detail, it will be appreciated by those skilled in the art that variations may be made in these embodiments without departing from the spirit of the invention, and these variations are to be considered within the scope of the invention.
Claims (5)
1. A speed ratio bag machine, includes the heat-seal area of the low-speed part and the cutting area of the high-speed part, its characterized in that:
the heat-sealing area comprises a longitudinal heat seal, a first traction roller, a second traction roller and a transverse heat seal arranged between the first traction roller and the second traction roller;
the cutting area comprises a third traction roller, a fourth traction roller, a material storage roller, an adjusting roller and a cutter, the material storage roller is arranged between the second traction roller and the third traction roller, the adjusting roller is arranged between the third traction roller and the fourth traction roller, and the cutter is positioned behind the fourth traction roller;
the ratio of the up-and-down movement rhythm of the cutter of the cutting area to the heat-sealing up-and-down movement rhythm of the heat-sealing area is 2-n: 1, the length ratio of the single-time traction material of the heat-sealing area to the cutting area is 2-n: 1, wherein n is a positive integer greater than 2, and the maximum value of n is 20.
2. The speed ratio bag machine of claim 1, wherein: the device also comprises a synchronous floating roller arranged between the first traction roller and the transverse heat seal, wherein the synchronous floating roller is provided with a first position sensor for compensating the traction distance of the first traction roller.
3. The speed ratio bag machine of claim 1, wherein: and a first positioning sensor is arranged between the transverse heat seal and the second traction roller and is used for compensating the traction distance of the second traction roller.
4. The speed ratio bag machine of claim 1, wherein: the adjusting roller is provided with a second position sensor which is used for compensating the traction distance of the third traction roller.
5. The speed ratio bag machine of claim 1, wherein: and a second positioning sensor is arranged between the adjusting roller and the cutter and is used for ensuring the cutting length of the cutter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210269738.2A CN114619707B (en) | 2022-03-18 | 2022-03-18 | Speed ratio bag making machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210269738.2A CN114619707B (en) | 2022-03-18 | 2022-03-18 | Speed ratio bag making machine |
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| Publication Number | Publication Date |
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| CN114619707A CN114619707A (en) | 2022-06-14 |
| CN114619707B true CN114619707B (en) | 2022-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210269738.2A Active CN114619707B (en) | 2022-03-18 | 2022-03-18 | Speed ratio bag making machine |
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| CN108347201A (en) * | 2018-02-28 | 2018-07-31 | 杭州数创自动化控制技术有限公司 | A kind of synchronisation control means of cutter motor and main motor |
| CN111971240A (en) * | 2018-04-17 | 2020-11-20 | 三菱电机株式会社 | Method for generating cam curve, device for generating cam curve, control device, conveying device, printing device, cutting device, and bag making machine |
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| CN114619707A (en) | 2022-06-14 |
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Denomination of invention: A speed ratio bag making machine Granted publication date: 20220913 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: HANGZHOU SOTRY AUTOMATIC CONTROL TECH Co.,Ltd. Registration number: Y2024330000054 |