Automatic adjustment method for incision position of pre-printed paper tube continuous forming

Abstract

The present invention discloses a method for automatically adjusting the position of the incision of a pre-printed paper tube continuous forming, comprising the steps of: S1, pre-printing a pattern a and a positioning mark b at a certain interval on the surface of a paper tape wound on a paper tray; S2, detecting the positioning mark b of the paper tape before forming the paper tube through a primary sensor, and obtaining the actual position value A1 corresponding to the main servo motor used to drive the cutter to perform the slitting action; comparing the actual position value A1 with the slitting target position value B set by the main servo motor, and obtaining the position difference C1; controlling the cloth belt servo motor to perform corresponding position compensation according to the position difference C1, so as to realize automatic correction of the incision position; wherein the cloth belt servo motor is used to drive the cloth belt to transport the paper tape into the paper tube forming module for forming and finally reach the cutter. The method for automatically adjusting the position of the incision of a pre-printed paper tube continuous forming of the present invention can realize automatic correction of the incision position of the paper tube, ensure the accuracy of the incision position, and ensure the quality.

Description

Technical Field

[0001] The invention relates to the technical field of paper tube forming, and in particular to a method for automatically adjusting a cutout position of a pre-printed paper tube continuous forming. Background Art

[0002] In the cigarette industry, most of the printing methods are to print patterns, trademarks and other logos on cigarette paper. At present, the existing equipment for printing such logos adopts online steel stamping technology, as shown in the attached figure of the specification. Figure 1 In the cigarette making equipment shown in the figure, the paper tape on the paper tray 1 is pulled by the paper supply roller into the steel printing device 12 to print the pattern, and then enters the paper tube forming module 5 to form a continuous cigarette rod, and finally the cutter cuts out the semi-finished cigarettes of the required length; among them, for printing with multi-color patterns, it is usually necessary to configure multiple sets of steel printing devices 12.

[0003] At present, the above-mentioned existing processes often have the following defects in the process of forming cigarettes: because the paper tape itself has a certain tension, and the paper tape accumulates errors during the transmission process, the position of the printed ink is easily offset when the steel stamp is used online, and there are many quality problems in online steel stamping, such as the offset of the two-color position of the steel stamp, the missing steel stamp, the steel stamp is too thick, the steel stamp is too light, and many other defects, resulting in uncontrollable quality. Although the use of pre-printing patterns on paper tape and then using them to form paper tubes can effectively ensure the controllable quality of the steel stamp, how to ensure the accurate position of the incision has become a problem. Therefore, it is necessary to propose a method for automatically adjusting the position of the incision of pre-printed paper tubes. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a method for automatically adjusting the incision position of a pre-printed paper tube continuous forming, which can realize automatic correction of the incision position of the paper tube, ensure that the incision position is accurate, the length of the cut paper tube meets the requirements, and the quality is effectively guaranteed.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for automatically adjusting the position of the cutout of a pre-printed paper tube continuous forming, comprising the following steps:

[0006] S1, the surface of the paper tape wound on the paper tray is pre-printed with a pattern a and a positioning mark b at a certain interval;

[0007] S2, detecting the positioning mark b of the paper tape before forming the paper tube through a primary sensor, and obtaining the actual position value A1 corresponding to the main servo motor used to drive the cutter to perform the slitting action; comparing the actual position value A1 with the slitting target position value B set by the main servo motor, and obtaining the position difference C1 therebetween; controlling the cloth tape servo motor to perform corresponding position compensation according to the position difference C1, so as to realize automatic correction of the incision position;

[0008] The cloth belt servo motor is used to drive the cloth belt to transport the paper belt into the paper tube forming module for forming and finally reach the cutter.

[0009] As a further improvement of the present invention, the method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming further comprises the following steps:

[0010] S3, detect the positioning mark b on the formed paper tube through the secondary sensor, and obtain the actual position value A2 corresponding to the main servo motor at this time; compare the actual position value A2 with the cutting target position value B to obtain the position difference C2 between them; control the cloth belt servo motor to perform corresponding position compensation according to the position difference C2, so as to realize accurate correction of the incision position.

[0011] As a further improvement of the present invention, the slitting target position value B is a position value determined by the main servo motor rotating a target number of pulses in a complete slitting action cycle;

[0012] The actual position value A1 and the actual position value A2 are both position values ​​determined by the actual number of pulses that the main servo motor has rotated in a corresponding slitting action cycle when the positioning mark b is detected.

[0013] As a further improvement of the present invention, in both S2 and S3, the PLC realizes the corresponding position compensation by adjusting the pulse frequency input to the belt servo motor within the set time;

[0014] When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor does not reach the slitting target position value B, the incision position is delayed, and the pulse frequency input to the tape servo motor within the set time is correspondingly reduced to slow down the speed of the tape servo motor for corresponding position compensation; after the position compensation is completed, the pulse frequency input to the tape servo motor is controlled to return to the initial frequency;

[0015] When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor just reaches the cutting target position value B or is within the allowable error range, the incision position is accurate and no adjustment is required;

[0016] When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor has exceeded the cutting target position value B, the incision position is advanced, and the pulse frequency input to the cloth belt servo motor within the set time is increased accordingly, so that the speed of the cloth belt servo motor is increased to perform corresponding position compensation; after the position compensation is completed, the pulse frequency input to the cloth belt servo motor is controlled to return to the initial frequency.

[0017] As a further improvement of the present invention, before the equipment is operated, the correspondence between the primary sensor, the secondary sensor, the cutter and the main servo motor is manually calibrated, that is, when the primary sensor and the secondary sensor simultaneously detect the corresponding positioning mark b, there is a corresponding positioning mark b that just reaches the cutter and the cutter is driven by the main servo motor to complete the cutting. At this time, the corresponding position value of the main servo motor is the cutting target position value B.

[0018] As a further improvement of the present invention, the main servo motor and the cloth belt servo motor are coupled with electronic gears at a certain speed ratio. When the cloth belt servo motor drives the cloth belt conveying paper tube to move forward a finished product length, the main servo motor drives the cutter to complete a cutting action.

[0019] As a further improvement of the present invention, when the paper tape on the paper tray is nearly consumed, the paper tape of the spare paper tray is spliced ​​with the paper tape of the paper tray, and the positioning marks b on the two paper tapes are ensured to be accurately aligned.

[0020] As a further improvement of the present invention, the paper tape on the standby paper tray is pulled out by an accelerating roller driven by an accelerating roller servo motor;

[0021] The process of splicing the paper tape of the spare paper tray with the paper tape of the paper tray is as follows:

[0022] First, controlling the acceleration roller servo motor to accelerate to the same speed as the paper feeding speed of the paper tray;

[0023] Afterwards, the positioning mark b on the paper tape of the paper tray is detected by the mark detection sensor A, and the positioning mark b on the paper tape of the standby paper tray is detected by the mark detection sensor B, and a mark position deviation value D is determined;

[0024] Next, the acceleration roller servo motor is controlled to perform corresponding position compensation according to the mark position deviation value D; after the position compensation is completed, the positioning marks b on the two paper tapes are accurately aligned and the paper feeding speed is kept consistent;

[0025] Finally, the paper tape of the spare paper tray is spliced ​​with the paper tape of the paper tray.

[0026] The beneficial effects of the present invention are as follows: the present invention provides a method for automatically adjusting the position of the incision of a pre-printed paper tube continuous forming, a pattern a and a positioning mark b are pre-printed on the surface of a paper tape at a certain interval, the positioning mark b of the paper tape before the forming paper tube is detected by a primary sensor, and the actual position value A1 at this time corresponding to the main servo motor used to drive the cutter to perform the slitting action is obtained; the actual position value A1 is compared with the slitting target position value B set by the main servo motor to obtain the position difference C1 therebetween, and the cloth belt servo motor is controlled to perform corresponding position compensation according to the position difference C1, so as to realize automatic correction of the incision position, ensure that the incision position is accurate, the length of the paper tube cut out meets the requirements, and the quality is effectively guaranteed, and the paper tube continuous forming equipment used to realize the method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming of the present invention does not need to be provided with an online steel stamping device, which can simplify the equipment structure and is more beneficial to production, manufacturing, maintenance and other aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of existing cigarette making equipment;

[0028] Figure 2 It is a flowchart of the steps of the method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming of the present invention;

[0029] Figure 3 It is a structural schematic diagram of a pre-printed paper tape used in the method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the paper tube continuous forming equipment used in the method for automatically adjusting the incision position of the pre-printed paper tube continuous forming of the present invention.

[0031] Combined with the accompanying drawings, the following description is given:

[0032] 1. Paper tray; 2. Primary sensor; 3. Cutter; 4. Cloth belt; 5. Paper tube forming module; 6. Secondary sensor; 7. Spare paper tray; 8. Acceleration roller; 9. Mark detection sensor A; 10. Mark detection sensor B; 11. Paper feed roller; 12. Stamping device; a. Pattern; b. Positioning mark. DETAILED DESCRIPTION

[0033] A preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

[0034] The invention provides a method for automatically adjusting the position of a cutout in continuous forming of a pre-printed paper tube, which is implemented by using a paper tube continuous forming device.

[0035] See also Figure 4The paper tube continuous forming equipment includes a feeding mechanism, a primary sensor 2, a cutter 3, a cloth belt 4, a paper tube forming module 5, a secondary sensor 6, a plurality of paper feeding rollers 11 and a glue roller. A paper tray 1 is placed on the feeding mechanism. The paper tape on the paper tray 1 is pulled by the paper feeding roller 11 and coated with glue by the glue roller and then transported to the cloth belt 4. The cloth belt 4 transports the paper tape into the paper tube forming module 5 and finally reaches the cutter 3 after forming, and is cut into segmented paper tubes by the cutter 3. The primary sensor 2 is set at a position close to the conveying start end of the cloth belt 4 and is set directly opposite to the paper tape, and is used to detect the positioning mark b on the paper tape. The secondary sensor 6 is set downstream of the paper tube forming module 5 along the paper feeding direction, located on one side of the cutter 3, and is set directly opposite to the formed paper tube, and is used to detect the positioning mark b on the formed paper tube. Both the primary sensor 2 and the secondary sensor 6 use color mark sensors, which are connected to the PLC for signal processing through a high-speed adopting module, and the adopting frequency is 100 times / ms.

[0036] Among them, the cutter 3 is driven by the main servo motor to perform the slitting action; the cloth belt 4 is driven to rotate by the cloth belt servo motor; the paper supply roller 11 is driven to rotate by the paper supply roller servo motor. The main servo motor, the cloth belt servo motor and the paper supply roller servo motor are all connected to the PLC, and the PLC controls the paper supply roller servo motor and the cloth belt servo motor to always run at the same speed.

[0037] See also Figure 2 and Figure 3 The method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming of the present invention includes steps S1 and S2.

[0038] S1, the surface of the paper tape wound on the paper tray 1 is pre-printed with a pattern a and a positioning mark b at a certain interval. The pattern a is a trademark, text or other mark printed according to the required steel; the length between two adjacent positioning marks b corresponds to the required length of the finished paper tube.

[0039] The paper tape on the paper tray 1 is pulled by the paper feeding roller 11 and is coated with glue by the glue roller and then transported to the cloth tape 4. The cloth tape 4 transports the paper tape into the paper tube forming module 5 for forming and finally reaches the cutter 3.

[0040] Step S2 includes steps S21 to S23.

[0041] S21, the positioning mark b of the paper tape before forming the paper tube is detected by the primary sensor 2. After receiving the detection signal, the PLC obtains the actual position value A1 corresponding to the main servo motor used to drive the cutter 3 to perform the slitting action. The actual position value A1 is the position value determined by the actual number of pulses that the main servo motor has rotated in a corresponding slitting action cycle when the primary sensor 2 detects the positioning mark b.

[0042] S22, the PLC compares the actual position value A1 with the slitting target position value B set by the main servo motor, and obtains the position difference C1 between them. The slitting target position value B is the position value determined by the main servo motor driving the cutter 3 to rotate the target pulse number in a complete slitting action cycle. In other words, when the PLC inputs the target pulse number of the main servo motor, the main servo motor drives the cutter 3 to complete a complete slitting action cycle.

[0043] S23, the PLC controls the cloth belt servo motor to perform corresponding position compensation according to the position difference C1, so as to realize automatic correction of the incision position. The corresponding position compensation is realized by the PLC by adjusting the pulse frequency input to the cloth belt servo motor within a set time.

[0044] In order to further achieve the function of fine adjustment of the incision position, the method for automatically adjusting the incision position of the pre-printed paper tube continuous molding of the present invention further includes step S3, which specifically includes the following steps:

[0045] S31, detect the positioning mark b on the formed paper tube through the secondary sensor 6, and after receiving the detection signal, the PLC obtains the actual position value A2 corresponding to the main servo motor at this time; wherein, the actual position value A2 is the position value determined by the actual number of pulses that the main servo motor has rotated in a corresponding cutting action cycle when the secondary sensor 6 detects the positioning mark b.

[0046] S32, PLC compares the actual position value A2 with the cutting target position value B to obtain the position difference C2 therebetween.

[0047] S33, the PLC controls the cloth belt servo motor to perform corresponding position compensation according to the position difference C2, so as to achieve accurate correction of the incision position; wherein, the position compensation is also achieved by the PLC by adjusting the pulse frequency input to the cloth belt servo motor within a set time.

[0048] In the present application, the main servo motor and the cloth belt servo motor are coupled with electronic gears according to a certain speed ratio. When the cloth belt servo motor drives the cloth belt 4 to convey the paper tube forward by the length of a finished paper tube, that is, the distance between two adjacent positioning marks b, the main servo motor drives the cutter 3 to complete a cutting action.

[0049] It should be noted that before the equipment is operated, the correspondence between the primary sensor 2, the secondary sensor 6, the cutter 3 and the main servo motor is manually calibrated, that is, when the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b at the same time, there is a corresponding positioning mark b that just reaches the cutter 3, and the cutter 3 is driven by the main servo motor to complete the cutting. At this time, the corresponding position value of the main servo motor is the cutting target position value B.

[0050] Theoretically, the cutting position of the paper tube is the position of the positioning mark b. Theoretically, when the main servo motor reaches the cutting target position value B, the primary sensor 2 and the secondary sensor 6 should just detect the corresponding positioning mark b. But in fact, due to the tension of the paper tape itself and the accumulated transmission error, the cutting position is deviated. When the main servo motor reaches the cutting target position value B, the primary sensor 2 and the secondary sensor 6 do not just detect the corresponding positioning mark b. That is to say, the actual cutting position of the paper tube is not on the positioning mark b at this time.

[0051] There are three specific situations:

[0052] When the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b, if the actual position value A1 or the actual position value A2 of the main servo motor has not reached the slitting target position value B, that is, the main servo motor driving the cutter 3 has not yet cut, the incision position is delayed, and the pulse frequency input to the cloth belt servo motor within the set time is correspondingly reduced to slow down the speed of the cloth belt servo motor for corresponding position compensation, so that when the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b, the actual position value A1 or the actual position value A2 of the main servo motor just reaches the slitting target position value B, and the incision position is adjusted. After the position compensation is completed, the pulse frequency of the control input cloth belt servo motor is restored to the initial frequency.

[0053] When the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b, if the actual position value A1 or the actual position value A2 of the main servo motor just reaches the cutting target position value B or is within the allowable error range, that is, the main servo motor drives the cutter 3 to cut, then the incision position is accurate and no adjustment is required.

[0054] When the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b, if the actual position value A1 or the actual position value A2 of the main servo motor has exceeded the slitting target position value B, that is, the main servo motor drives the cutter 3 to slitting, then the incision position is advanced, and the pulse frequency input to the cloth belt servo motor within the set time is increased accordingly, so that the speed of the cloth belt servo motor is increased to perform corresponding position compensation, so that when the primary sensor 2 and the secondary sensor 6 detect the corresponding positioning mark b, the actual position value A1 or the actual position value A2 of the main servo motor just reaches the slitting target position value B, and the incision position is adjusted. After the position compensation is completed, the pulse frequency of the control input cloth belt servo motor is restored to the initial frequency.

[0055] Furthermore, in order to realize continuous production without stopping, the paper tube continuous forming equipment also includes a paper tape automatic splicing mechanism, an acceleration roller 8, an acceleration roller servo motor driving the acceleration roller 8 to rotate, a mark detection sensor A9 and a mark detection sensor B10. The acceleration roller servo motor is connected to the PLC and is used to drive the acceleration roller 8 to pull and send out the paper tape of the spare paper tray 7 placed on the feeding mechanism. The mark detection sensor A9 and the mark detection sensor B10 are both arranged on one side of the feeding mechanism, and the mark detection sensor A9 is directly opposite to the paper tape pulled out by the paper tray 1, and is used to detect the positioning mark b on the paper tape of the paper tray 1; the mark detection sensor B10 is directly opposite to the paper tape pulled out by the spare paper tray 7, and is used to detect the positioning mark b on the paper tape of the spare paper tray 7. The mark detection sensor A9 and the mark detection sensor B10 also use color mark sensors, which are connected to the PLC for signal processing through a high-speed adopting module, and the adopting frequency is 100 times / ms.

[0056] When the paper tape on the paper tray 1 is almost exhausted, the paper tape on the spare paper tray 7 is pulled out by the acceleration roller 8 driven by the acceleration roller servo motor, and the paper tape of the spare paper tray 7 is spliced ​​with the paper tape of the paper tray 1 through the paper tape automatic splicing mechanism, and the positioning marks b on the two paper tapes are accurately aligned. Among them, the paper tape automatic splicing mechanism is a prior art known in the art.

[0057] The specific process of splicing the paper tape of the spare paper tray 7 with the paper tape of the paper tray 1 is as follows:

[0058] First, the PLC controls the acceleration roller servo motor to drive the acceleration roller 8 to pull the paper tape of the spare paper tray 7 to accelerate the speed to the same as the paper feeding speed of the paper tray 1;

[0059] Afterwards, the positioning mark b on the paper tape of the paper tray 1 is detected by the mark detection sensor A9, and the positioning mark b on the paper tape of the spare paper tray 7 is detected by the mark detection sensor B10, and the mark position deviation value D of the two is determined;

[0060] Next, the acceleration roller servo motor is controlled to perform corresponding position compensation according to the mark position deviation value D. The position compensation is the same as the position compensation of the cloth belt servo motor, and will not be repeated here. After the position compensation is completed, the positioning marks b on the two paper belts are accurately aligned and the paper feeding speed is consistent;

[0061] Finally, the paper tape of the spare paper tray 7 is spliced ​​with the paper tape of the paper tray 1 through the paper tape automatic splicing mechanism, and the remaining paper tape on the paper tray 1 and the paper tape on the front end of the spare paper tray 7 that has been pulled out by the acceleration roller 8 are cut off to complete the splicing.

[0062] It can be seen that the present invention provides a method for automatically adjusting the incision position of continuous forming of pre-printed paper tubes, pre-printing a pattern a and a positioning mark b on the surface of the paper tape at a certain interval, detecting the positioning mark b of the paper tape before the forming paper tube through a primary sensor, and obtaining the actual position value A1 at this time corresponding to the main servo motor used to drive the cutter to perform the slitting action; comparing this actual position value A1 with the slitting target position value B set by the main servo motor, and obtaining the position difference C1 therebetween, and controlling the cloth belt servo motor to perform corresponding position compensation according to the position difference C1, so as to realize automatic correction of the incision position, ensure that the incision position is accurate, the length of the paper tube cut out meets the requirements, and the quality is effectively guaranteed, and the paper tube continuous forming equipment used to realize the method for automatically adjusting the incision position of continuous forming of pre-printed paper tubes of the present invention does not need to be provided with an online steel stamping device, which can simplify the equipment structure and is more beneficial to production, manufacturing, maintenance and other aspects.

[0063] The present application is not only applicable to cigarette forming, but can also be used for pre-printed paper straw forming, for example.

[0064] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A method for automatically adjusting the position of the incision of a pre-printed paper tube continuous forming process, characterized in that: The following steps are involved: S1, a pattern a and positioning marks b are pre-printed on the surface of a paper tape wound on a paper tray (1) at a certain interval; S2, detecting the positioning mark b of the paper tape before forming the paper tube through a primary sensor (2), and obtaining the actual position value A1 at this time corresponding to the main servo motor used to drive the cutter (3) to perform the slitting action; comparing the actual position value A1 with the slitting target position value B set by the main servo motor to obtain the position difference C1 therebetween; controlling the cloth tape servo motor to perform corresponding position compensation according to the position difference C1, thereby realizing automatic correction of the incision position; wherein the cloth tape servo motor is used to drive the cloth tape (4) to transport the paper tape into the paper tube forming module (5) to form the paper tape and finally reach the cutter (3); S3, detecting the positioning mark b on the formed paper tube by means of a secondary sensor (6), and obtaining the actual position value A2 corresponding to the main servo motor at this time; comparing the actual position value A2 with the slitting target position value B to obtain the position difference C2 therebetween; and controlling the cloth belt servo motor to perform corresponding position compensation according to the position difference C2, so as to achieve accurate correction of the incision position; The slitting target position value B is the position value determined by the target pulse number of the main servo motor in a complete slitting action cycle; the actual position value A1 and the actual position value A2 are both the position values ​​determined by the actual pulse number of the main servo motor in a corresponding slitting action cycle when the positioning mark b is detected; In both S2 and S3, the PLC realizes the corresponding position compensation by adjusting the pulse frequency input to the belt servo motor within the set time; When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor does not reach the slitting target position value B, the incision position is delayed, and the pulse frequency input to the tape servo motor within the set time is correspondingly reduced to slow down the speed of the tape servo motor for corresponding position compensation; after the position compensation is completed, the pulse frequency input to the tape servo motor is controlled to return to the initial frequency; When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor just reaches the cutting target position value B or is within the allowable error range, the incision position is accurate and no adjustment is required; When the positioning mark b is detected, if the actual position value A1 or the actual position value A2 of the main servo motor has exceeded the cutting target position value B, the incision position is advanced, and the pulse frequency input to the cloth belt servo motor within the set time is increased accordingly, so that the speed of the cloth belt servo motor is increased to perform corresponding position compensation; after the position compensation is completed, the pulse frequency input to the cloth belt servo motor is controlled to return to the initial frequency.

2. The method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming according to claim 1 is characterized in that: Before the equipment is operated, the corresponding relationship between the primary sensor (2), the secondary sensor (6), the cutter (3) and the main servo motor is manually calibrated, that is, when the primary sensor (2) and the secondary sensor (6) simultaneously detect the corresponding positioning mark b, there is a corresponding positioning mark b that just reaches the cutter (3) and the cutter (3) is driven by the main servo motor to complete the cutting. At this time, the corresponding position value of the main servo motor is the cutting target position value B.

3. The method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming according to claim 1 is characterized in that: The main servo motor and the cloth belt servo motor are coupled with electronic gears at a certain speed ratio. When the cloth belt servo motor drives the cloth belt (4) to convey the paper tube forward by a finished product length, the main servo motor drives the cutter (3) to just complete a slitting action.

4. The method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming according to claim 1 is characterized in that: When the paper tape on the paper tray (1) is nearly exhausted, the paper tape on the spare paper tray (7) is spliced ​​with the paper tape on the paper tray (1), and the positioning marks b on the two paper tapes are ensured to be accurately aligned.

5. The method for automatically adjusting the position of the incision of the pre-printed paper tube continuous forming according to claim 4 is characterized in that: The paper tape on the spare paper tray (7) is pulled out by an acceleration roller (8) driven by an acceleration roller servo motor; The process of splicing the paper tape of the spare paper tray (7) with the paper tape of the paper tray (1) is as follows: First, controlling the acceleration roller servo motor to accelerate to the same speed as the paper feeding speed of the paper tray (1); Afterwards, the positioning mark b on the paper tape of the paper tray (1) is detected by a mark detection sensor A (9), and the positioning mark b on the paper tape of the spare paper tray (7) is detected by a mark detection sensor B (10), and a mark position deviation value D is determined; Next, the accelerating roller servo motor is controlled to perform corresponding position compensation according to the marked position deviation value D; After the position compensation is completed, the positioning marks b on the two paper tapes are accurately aligned and the paper feeding speed is consistent; Finally, the paper tape of the spare paper tray (7) is spliced ​​with the paper tape of the paper tray (1).

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