Automatic paper splicing component of paper tube forming machine

Abstract

The present invention discloses an automatic paper splicing assembly for a paper tube forming machine, which includes a translational clamping and positioning mechanism and a lifting, pressing, and cutting mechanism. The translational clamping and positioning mechanism includes a positioning support plate, a translational cylinder, and a paper pressing pad. The positioning support plate is located on the left side just below the paper pressing pad. The translational cylinder can drive the positioning support plate to move horizontally in the front-back direction. After the positioning support plate extends forward, a clamping gap is formed between the positioning support plate and the paper pressing pad for a new paper tape to be clamped and positioned. The left end of the new paper tape is located just below the paper pressing pad and has an adhesive section. The lifting, pressing, and cutting action of the lifting, pressing, and cutting mechanism allows the adhesive section at the free end of the new paper tape to be automatically bonded to the old paper tape below, and the old paper tape is automatically cut off almost simultaneously on the paper feed side near the bonding point. When splicing paper, no new paper tape is wasted due to the need to speed up to the same speed as the old paper tape, making paper splicing convenient and cost-effective.

Description

Technical Field

[0001] The invention belongs to the field of special tobacco production equipment, and in particular relates to an automatic paper splicing component of a paper tube forming machine. Background Art

[0002] Paper tube forming machines are used to produce the paper tubes for hollow composite or countersunk base rods. Unlike conventional cigarette wrapping paper, these tubes have a wall thickness of approximately 0.35mm, significantly thicker than conventional wrapping paper. Paper tube forming machines operate at a high speed, with a 1,200-meter roll requiring replacement approximately every 15 minutes. This requires splicing when the old roll is replaced with the new one. Conventional cigarette equipment uses thinner paper in the splicing components of the tube forming section, typically requiring online roll changes. This pre-acceleration of the old paper tape is necessary during roll changes. Once the pre-acceleration reaches the same speed as the old tape, the new and old tapes are bonded together using double-sided tape. During this bonding process, any remaining tape from the front of the new tape is removed and collected as waste paper. This results in significant paper waste and increases paper tube production costs.

[0003] Especially when producing hollow composite base rods or countersunk base rods, since the paper used is much thicker than conventional forming paper, the success rate of paper splicing using conventional paper splicing components will be reduced on the one hand, and on the other hand, the waste caused by thick paper will be more serious and the cost will be higher. Summary of the Invention

[0004] The object of the present invention is to provide an automatic paper splicing assembly for a paper tube forming machine, aiming to overcome the above-mentioned shortcomings of the automatic paper splicing assembly of the existing paper tube forming machine.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an automatic paper splicing assembly of a paper tube forming machine, which includes a translational clamping positioning mechanism and a lifting and pressing cutting mechanism. The translational clamping positioning mechanism includes a positioning support plate, a translational cylinder and a paper pressing pad. The positioning support plate is located on the left side directly below the paper pressing pad. The translational cylinder can drive the positioning support plate to move horizontally in the forward and backward directions. After the positioning support plate extends forward, a clamping gap is formed between it and the paper pressing pad for the new paper tape to be clamped and positioned. The left end of the new paper tape is located directly below the paper pressing pad and has a viscose section.

[0006] The lifting, pressing and cutting mechanism includes a paper pressing plate, a cutting knife and a lifting cylinder. The paper pressing plate is located on the right side just below the paper pressing pad. The old paper tape passes just below the positioning support plate and passes to the right through the gap between the paper pressing pad and the paper pressing plate. The lifting cylinder can drive the paper pressing plate to move upward to lift the old paper tape and press it against the adhesive section of the new paper tape. When the paper pressing plate makes the old paper tape contact the new paper tape and presses and bonds them tightly, the cutting knife moves to the left and finally breaks through and cuts off the old paper tape.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] In some embodiments, it also includes a fixed base plate and a movable base plate, both of which are vertically arranged, and the rear wall of the fixed base plate is equipped with the translation cylinder through a horizontal first seat plate, and a through hole is opened on the fixed base plate for the positioning support plate to pass through, and the telescopic end on the front side of the translation cylinder is fixedly connected to the rear end of the positioning support plate, and the movable base plate is slidably connected to the vertical slide rail on the front side of the fixed base plate through a slider, and the lifting cylinder is installed above the front side of the fixed base plate through a horizontal second seat plate, and the telescopic end of the lifting cylinder passes through the rear part of the second seat plate and is connected to the movable base plate below, the paper pressing pad is fixed to the lower surface of the front part of the second seat plate, and the cutter sliding seat plate is rotatably connected to the front wall of the movable base plate, and the paper pressing plate is arranged on the cutter sliding seat plate.

[0009] The beneficial effect of adopting the above further scheme is that by setting up a fixed base plate, it is convenient to install the movable base plate and the translational clamping positioning mechanism and the lifting and pressing cutting mechanism, and it is also convenient to fix the entire paper splicing assembly to a larger installation base plate of the paper tube forming machine.

[0010] In some embodiments, the lower surface of the second seat plate is provided with a front-to-back slide rail, and the positioning support plate is slidably engaged with the front-to-back slide rail via a slider fixed on the upper surface.

[0011] The beneficial effect of adopting the above further solution is that the setting of the forward and backward slide rails facilitates the cooperation of the positioning support plate with the slider, so that the positioning support plate is more stable and has less friction when being driven by the translation cylinder to extend and retract, and is more durable.

[0012] The cam is secured to the bottom of the movable base plate and is pivotally connected to the left side of the cutter sliding seat plate by a spring. The cam is secured to the bottom of the movable base plate by a spring. The cam is secured to the bottom of the movable base plate by a spring.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that the right side of the cutter sliding seat plate is rotatably connected to the movable base plate, and the left side is inclined to the upper left, that is, the left side is slightly higher than the right side. In this way, when the movable base plate moves upward, the left side of the paper pressure plate on the cutter sliding seat plate first contacts the paper pressing pad. After being pressed, the cutter sliding seat plate rotates around the bearing until it turns horizontally and is parallel to the paper pressing pad, thereby realizing the bonding and splicing of new and old papers.

[0014] In some embodiments, the paper pressure plate is connected to the cutter sliding seat plate through a sliding and swinging mechanism. The swinging and sliding mechanism includes a sliding plate, a movable rocker and a rocker seat. The front wall of the cutter sliding seat plate is provided with left and right sliding rails. The sliding plate is slidably connected to the left and right sliding rails. The upper edge of the sliding plate is fixedly connected to the bottom wall of the paper pressure plate. The rocker seat is fixed on the lower right side of the front wall of the movable base plate. The middle part of the front wall of the sliding plate is hinged to the rocker seat through the movable rocker.

[0015] The beneficial effect of adopting the above-mentioned further scheme is that when the cutter sliding seat plate rotates around the bearing part, the sliding plate will move slightly to the left while rotating due to the limiting effect of the movable rocker arm hinged to the movable base plate below, so that the protruding cutting knife will contact the old paper and finally cut off the old paper strip.

[0016] In some embodiments, an auxiliary paper pressing mechanism is also provided on the left side of the front wall of the movable base, and the auxiliary paper pressing mechanism is located directly below the positioning support plate in the extended state. When the lifting cylinder drives the movable base plate to move upward so that the paper pressing plate presses the paper pressing pad, the auxiliary paper pressing mechanism presses the old paper tape against the lower surface of the positioning support plate.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that the auxiliary paper pressing mechanism of the above-mentioned structure has a simple structure. When the cutting knife cuts the old paper tape, if the left side of the paper tape at the cutting end is not pressed and fixed, it cannot be effectively cut. The auxiliary paper pressing mechanism can better realize this function.

[0018] In some embodiments, the auxiliary paper pressing mechanism includes a spring sleeve, in which a number of compression springs are provided. The compression springs are connected to the auxiliary paper pressing rod. The auxiliary paper pressing mechanism presses the old paper tape through the upper end surface of the auxiliary paper pressing rod and the compression springs are in a compressed state.

[0019] The beneficial effect of adopting the above further solution is that the compression spring cooperates with the auxiliary paper pressing rod, the structure is simple, and effective buffering is provided during pressing, and the pressing and positioning effect is good.

[0020] In some embodiments, two paper guide wheels are respectively arranged on the left and right sides of the front wall of the fixed base plate, and the paper guide wheels on the left and right sides are symmetrically arranged.

[0021] The beneficial effect of adopting the above further solution is that it has a better guiding effect on the paper, so that the old paper strip passes through the paper splicing assembly in a nearly horizontal state.

[0022] In some embodiments, the vertical slide rail is fixed to the front wall of the fixed base plate via a lifting and sliding seat.

[0023] The beneficial effect of adopting the above further solution is that the lifting and sliding seat can separate the movable base plate from the fixed base plate, which is convenient for installing some functional components.

[0024] In some embodiments, the front end of the positioning support plate is provided with a clearance groove that cooperates with the cutting knife.

[0025] The beneficial effect of adopting the above further solution is that the cutting knife is unlikely to touch the positioning support plate when cutting the old paper tape.

[0026] Compared with the prior art, the technical effects and advantages of the present invention are:

[0027] The automatic paper splicing assembly provided by the present invention realizes automatic bonding of the adhesive section of the free end of the new paper tape (the adhesive coated portion on the lower surface of the free end or the single-sided transparent tape directly adhered thereto) with the old paper tape below through the lifting, pressing and cutting action of the lifting, pressing and cutting mechanism, and automatically cuts off the old paper tape on the paper feed side near the bonding point almost simultaneously, thereby realizing automatic paper splicing; when splicing paper, there will be no waste of a long section of the free end paper tape due to the need to speed up the new paper tape to the same speed as the old paper tape, and paper splicing is convenient and there is almost no waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An axonometric view of an automatic paper splicing assembly of a paper tube forming machine provided by the present invention;

[0029] Figure 2 for Figure 1 The front view of the paper splicing assembly is shown;

[0030] Figure 3 for Figure 1 A left side view of the paper splicing assembly shown;

[0031] Figure 4 for Figure 1 A top view of the paper splicing assembly shown;

[0032] Figure 5 for Figure 1 An axonometric view of the translational engaging and positioning mechanism in the paper splicing assembly shown;

[0033] Figure 6 for Figure 1 Axonometric drawing of the fixed and movable base plates and the first and second seat plates after assembly;

[0034] Figure 7 for Figure 6 a left side view of the assembly structure shown;

[0035] Figure 8 This is an axonometric view of the lifting, pressing and cutting mechanism (the lifting cylinder is not shown);

[0036] Figure 9 for Figure 8 a front view of the mechanism shown;

[0037] Figure 10 for Figure 8 Top view of the mechanism shown.

[0038] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0039] 1. Positioning support plate; 2. Translation cylinder; 3. Paper pressing pad; 4. Paper pressing plate; 5. Cutting knife; 6. Lifting cylinder; 7. Fixed base plate; 8. Moving base plate; 9. First seat plate; 10. Vertical slide rail; 11. Second seat plate; 12. Cutter sliding seat plate; 13. Forward and backward slide rail; 14. Bearing; 15. Lifting push rod; 16. Spring seat; 17. Push spring; 18. Slide plate; 19. Moving rocker; 20. Rocker seat; 21. Left and right slide rail; 22. Spring sleeve; 23. Auxiliary paper pressing rod; 24. Paper guide wheel; 25. Lifting slide seat; 26. Yield slot. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0043] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0044] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0045] The following will be combined Figure 1-10 , an automatic paper splicing assembly of a paper tube forming machine involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation of the present application.

[0046] like Figures 1 to 10 As shown, the present invention provides an automatic paper splicing assembly for a paper tube forming machine, which is mainly used in the field of automatic paper splicing technology of paper tube forming machines. It includes a translational clamping and positioning mechanism and a lifting, pressing, and cutting mechanism. The translational clamping and positioning mechanism includes a positioning support plate 1, a translation cylinder 2, and a paper pressing pad 3. The positioning support plate 1 is located on the left side just below the paper pressing pad 3. The translation cylinder 2 can drive the positioning support plate 1 to move horizontally in the front and back directions. After the positioning support plate 1 extends forward, a slot is formed between the positioning support plate 1 and the paper pressing pad 3 for a new paper tape to be clamped and positioned. The left end of the new paper tape is located just below the paper pressing pad 3 and has a glue section. The lifting, pressing, and cutting mechanism The mechanism includes a paper pressing plate 4, a cutting knife 5 and a lifting cylinder 6. The paper pressing plate 4 is located on the right side just below the paper pressing pad 3. The old paper tape passes just below the positioning support plate 1 and passes to the right through the gap between the paper pressing pad 3 and the paper pressing plate 4. The lifting cylinder 6 can drive the paper pressing plate 4 to move upward to lift the old paper tape and press it against the adhesive section of the new paper tape. When the paper pressing plate 4 makes the old paper tape contact the new paper tape and presses and bonds them tightly, the cutting knife 5 moves to the left and finally breaks through and cuts off the old paper tape.

[0047] Through the lifting, pressing and cutting effects of the lifting, pressing and cutting mechanism, the adhesive section at the free end of the new paper tape is automatically bonded to the old paper tape below, and the old paper tape is automatically cut off almost simultaneously on the paper feed side near the bonding point; when splicing paper, there is no waste of the new paper tape due to the need to speed up to the same speed as the old paper tape, and the paper splicing is convenient and does not increase the cost.

[0048] It should be noted that the terms "translational cylinder" and "lifting cylinder" in the present invention should be broadly interpreted to include cylinders powered by compressed gas, as well as common mechanical components that achieve telescopic motion, such as electric or hydraulic cylinders powered by electricity or liquid pressure. The adhesive segment can be a piece of paper tape manually coated with glue on the bottom surface of the free end of a new paper tape, or a piece of transparent tape directly attached to the free end, with the adhesive side of the tape facing downward.

[0049] In one embodiment of the present invention, it also includes a fixed base plate 7 and a movable base plate 8, both of which are vertically arranged. The rear wall of the fixed base plate 7 is equipped with the translation cylinder 2 through a horizontal first seat plate 9. A through hole is opened on the fixed base plate 7 for the positioning support plate 1 to pass through. The telescopic end of the front side of the translation cylinder 2 is fixedly connected to the rear end of the positioning support plate 1. The movable base plate 8 is slidably connected to the vertical slide rail 10 on the front side of the fixed base plate 7 through a slider. The lifting cylinder 6 is installed above the front side of the fixed base plate 7 through a horizontal second seat plate 11. The telescopic end of the lifting cylinder 6 passes through the rear part of the second seat plate 11 and is connected to the movable base plate 8 below. The paper pressing pad 3 is fixed on the lower surface of the front part of the second seat plate 11. The front wall of the movable base plate 8 is rotatably connected with a cutter sliding seat plate 12, and the paper pressing plate 4 is arranged on the cutter sliding seat plate 12.

[0050] It should be noted that if Figure 1 and Figure 4 As shown, the second seat plate passes through the through hole of the fixed base plate and is fixed to the front wall of the fixed base plate through the left and right ribs arranged on the front side.

[0051] In one embodiment of the present invention, a front-rear slide rail 13 is provided on the lower surface of the second seat plate 11 , and the positioning support plate 1 is slidably engaged with the front-rear slide rail 13 via a slider fixed on the upper surface.

[0052] It can be understood that the slider is fixed on the positioning support plate, and the number of the forward and backward sliding rails can be one or two.

[0053] The cam 15 is hinged to the upper end of a lifting push rod 15 by a pin shaft at the lower left side of the cutter sliding seat plate 12, and the lower end of the lifting push rod 15 is inserted into the limiting hole of the spring seat 16 provided on the front wall of the movable base plate 8. The inner diameter of the limiting hole is larger than the outer diameter of the lifting push rod 15. A push spring 17 is sleeved on the lifting push rod 15, and the lower end of the push spring 17 is tightly pressed against the spring seat 16, and the upper end is tightly pressed against the pin shaft. The upper edge of the paper pressing plate 4 is flush with the upper edge of the left side of the cutter sliding seat plate 12, and the cutting knife 5 is fixed below the left end of the paper pressing plate 4 and the blade protrudes to the left. The push spring 17 keeps the cutter sliding seat plate 12, the paper pressing plate 4 and the cutting knife 5 tilted to the upper left before pressing the paper pressing pad 3.

[0054] It should be noted that a square sleeve with a hinged interface can be provided at the upper end of the lift push rod, with the sleeve facing downward and fixedly connected to the upper end of the lift push rod. The push spring is sleeved on the lift push rod, and the upper end abuts the top wall of the square sleeve. The cutter sliding seat plate 12, paper pressure plate 4, and cutting knife 5 are all tilted to the upper left before pressing the paper pressing pad 3. The tilt angle is relatively small, generally controlled within 10 degrees, with the left side higher and the right side lower.

[0055] In one embodiment of the present invention, the paper pressing plate 4 is connected to the cutter sliding seat plate 12 through a sliding and swinging mechanism, and the swinging and sliding mechanism includes a sliding plate 18, a movable rocker 19 and a rocker seat 20. The front wall of the cutter sliding seat plate 12 is provided with left and right slide rails 21, and the sliding plate 18 is slidably connected to the left and right slide rails 21. The upper edge of the sliding plate 18 is fixedly connected to the bottom wall of the paper pressing plate 4, and the rocker seat 20 is fixed on the lower right side of the front wall of the movable base plate 8. The middle part of the front wall of the sliding plate 18 is hinged to the rocker seat 20 through the movable rocker 19.

[0056] In one embodiment of the present invention, an auxiliary paper pressing mechanism is further provided on the left side of the front wall of the movable base plate 8. The auxiliary paper pressing mechanism is located directly below the positioning support plate 1 in the extended state. When the lifting cylinder 6 drives the movable base plate 8 to move upward so that the paper pressing plate 4 presses the paper pressing pad 3, the auxiliary paper pressing mechanism presses the old paper tape against the lower surface of the positioning support plate 1.

[0057] In one embodiment of the present invention, the auxiliary paper pressing mechanism includes a spring sleeve 22, in which a plurality of compression springs are provided. The compression springs are connected to the auxiliary paper pressing rod 23. The auxiliary paper pressing mechanism presses the old paper tape through the upper end surface of the auxiliary paper pressing rod 23 and the compression springs are in a compressed state.

[0058] In one embodiment of the present invention, two paper guide wheels 24 are respectively arranged on the left and right sides of the front wall of the fixed base plate 7, and the left and right paper guide wheels 24 are symmetrically arranged (the two right paper guide wheels are not fully drawn in the figure).

[0059] In one embodiment of the present invention, the vertical slide rail 10 is fixed to the front wall of the fixed base plate 7 via a lifting and sliding seat 25 .

[0060] In one embodiment of the present invention, a front end of the positioning support plate 1 is provided with a clearance groove 26 that cooperates with the cutting knife 5 .

[0061] The basic principle of the present invention is briefly described as follows:

[0062] The paper splicing assembly provided by the present invention is used for bonding new and old paper tapes. The paper splicing assembly is also provided with a paper reel assembly on the feed side, and a paper tape cutting assembly, a material storage assembly, a paper tape splicing assembly and a paper tube forming assembly on the discharge side. When the old paper tape in the paper reel assembly is close to being used up, the corresponding alarm mechanism is activated to send a signal to remind the worker to change the roll. In addition to the old paper roll that is about to be used up, the paper reel assembly also has a new paper roll station. After the worker places the new paper roll on the corresponding station of the paper reel assembly, he pulls out the free end of the new paper roll and applies glue or adheres it with transparent tape (the following takes the example of sticking transparent tape). One end of the transparent tape is adhered to the free end, and the other end extends out of the free end with the glue side facing down.

[0063] The translation cylinder is started to retract the positioning support plate backward, and then the new paper tape is pulled up to the water surface with the upper surface touching the lower surface of the paper pressing pad. The translation cylinder is then extended to make the positioning support plate extend forward, and the new paper tape is stuck between the upper surface of the front of the positioning support plate and the paper pressing pad. Since the paper is thicker, the free end of the tape is suspended below the paper pressing pad (also above the old paper tape). Then, when the old paper tape is about to run out, the motor in the cutting assembly at the rear that drives the old paper tape forward gradually stops, causing the old paper tape to stop, while excess old paper tape is coiled in the material holding assembly.

[0064] When the old paper tape stops being supplied on the feeding side, the material holding component can still supply the old paper tape for a short period of time to ensure that subsequent work does not stop. When the old paper tape at the paper receiving component stops completely, the lifting cylinder is started to drive the movable base plate and its upper components to move up, and the paper pressing plate and the auxiliary paper pressing assembly gradually lift the old paper tape and press it against the new paper tape on the paper pressing pad. The left side of the upper surface of the paper pressing plate is higher, so it is pressed against the paper pressing pad first. As the lifting cylinder continues to contract, the paper pressing plate and the cutter sliding seat rotate around the bearing until they rotate from tilted to the upper left to nearly horizontal. At this time, the old and new paper tapes are connected by transparent tape. During this process, the sliding plate will slide to the left due to the action of the moving rocker, and the cutting knife under the paper pressing plate will break and cut the old paper tape. Before cutting, the auxiliary paper pressing assembly on the left and the paper pressing plate on the right have both pressed the old paper tape. After cutting, the lifting cylinder extends to make the movable base plate drive its upper component to move down, releasing the old and new paper tapes, and then start the motor in the paper tape cutting assembly to continue to supply paper tape from the new paper roll.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic paper splicing assembly for a paper tube forming machine, characterized in that: It includes a translational locking and positioning mechanism and a lifting, pressing and cutting mechanism; The translational locking and positioning mechanism comprises a positioning support plate (1), a translational cylinder (2) and a paper pressing pad (3), wherein the positioning support plate (1) is located on the left side below the paper pressing pad (3), and the translational cylinder (2) is used to drive the positioning support plate (1) to move horizontally in the front-back direction. After the positioning support plate (1) extends forward, a slot is formed between the positioning support plate (1) and the paper pressing pad (3) for the new paper tape to be clamped and positioned. The left end of the new paper tape is located below the paper pressing pad (3) and has a glue section. The lifting, pressing and cutting mechanism comprises a paper pressing plate (4), a cutting knife (5) and a lifting cylinder (6). The paper pressing plate (4) is located on the right side below the paper pressing pad (3). The old paper tape passes from below the positioning support plate (1) and passes to the right through the gap between the paper pressing pad (3) and the paper pressing plate (4). The lifting cylinder (6) drives the paper pressing plate (4) to move upward to lift the old paper tape and press it against the adhesive section of the new paper tape. When the paper pressing plate (4) makes the old paper tape contact the new paper tape and presses and bonds them tightly, the cutting knife (5) moves to the left and finally breaks and cuts the old paper tape. It also includes a fixed base plate (7) and a movable base plate (8) both of which are vertically arranged, the rear wall of the fixed base plate (7) is installed with the translation cylinder (2) through a horizontal first seat plate (9), the fixed base plate (7) is provided with a through hole for the positioning support plate (1) to pass through, the telescopic end of the front side of the translation cylinder (2) is fixedly connected to the rear end of the positioning support plate (1), the movable base plate (8) is slidably connected to the vertical slide rail (10) on the front side of the fixed base plate (7) through a slider, the lifting cylinder (6) is installed above the front side of the fixed base plate (7) through a horizontal second seat plate (11), the telescopic end of the lifting cylinder (6) passes through the rear part of the second seat plate (11) and is connected to the movable base plate (8) below; The paper pressing pad (3) is fixed to the lower front surface of the second seat plate (11); a cutter sliding seat plate (12) is rotatably connected to the front wall of the movable base plate (8); the paper pressing plate (4) is arranged on the cutter sliding seat plate (12); a front and rear sliding rail (13) is provided on the lower surface of the second seat plate (11); the positioning support plate (1) is slidably engaged with the front and rear sliding rail (13) via a slider fixed on the upper surface; The right side of the cutter sliding seat plate (12) is rotatably connected to the movable base plate (8), and the lower left side is hinged to the upper end of a lifting push rod (15) through a pin shaft. The lower end of the lifting push rod (15) is inserted into the limiting hole of the spring seat (16) provided on the front wall of the movable base plate (8). The inner diameter of the limiting hole is larger than the outer diameter of the lifting push rod (15). A push spring (17) is sleeved on the lifting push rod (15). The push spring (17) The lower end is pressed against the spring seat (16), and the upper end is pressed against the pin shaft. The upper edge of the paper pressing plate (4) is flush with the upper edge of the left side of the cutter sliding seat plate (12). The cutting knife (5) is fixed below the left end of the paper pressing plate (4) and the blade protrudes to the left. The pushing spring (17) keeps the cutter sliding seat plate (12), the paper pressing plate (4) and the cutting knife (5) tilted to the upper left before pressing the paper pressing pad (3). The paper pressing plate (4) is connected to the cutter sliding seat plate (12) through a sliding and swinging mechanism. The sliding and swinging mechanism includes a sliding plate (18), a movable rocker (19) and a rocker seat (20). A left and right sliding rail (21) is provided on the front wall of the cutter sliding seat plate (12). The sliding plate (18) is slidably connected to the left and right sliding rail (21). The upper edge of the sliding plate (18) is fixedly connected to the bottom wall of the paper pressing plate (4). The rocker seat (20) is fixed on the lower right side of the front wall of the movable base plate (8). The middle part of the front wall of the sliding plate (18) is hinged to the rocker seat (20) through the movable rocker (19). An auxiliary paper pressing mechanism is also provided on the left side of the front wall of the movable base plate (8).

2. The automatic paper splicing assembly of a paper tube forming machine according to claim 1, characterized in that: The auxiliary paper pressing mechanism is located below the extended positioning support plate (1). When the lifting cylinder (6) drives the movable base plate (8) to move upward to cause the paper pressing plate (4) to press the paper pressing pad (3), the auxiliary paper pressing mechanism presses the old paper tape against the lower surface of the positioning support plate (1).

3. The automatic paper splicing assembly of a paper tube forming machine according to claim 2, characterized in that: The auxiliary paper pressing mechanism comprises a spring sleeve (22), wherein a plurality of compression springs are arranged in the spring sleeve (22), and the compression springs are connected to the auxiliary paper pressing rod (23). The auxiliary paper pressing mechanism presses the old paper tape through the upper end surface of the auxiliary paper pressing rod (23), and the compression springs are in a compressed state.

4. The automatic paper splicing assembly of a paper tube forming machine according to any one of claims 1 to 3, characterized in that: Two paper guide wheels (24) are respectively arranged on the left and right sides of the front wall of the fixed base plate (7), and the paper guide wheels (24) on the left and right sides are symmetrically arranged.

5. The automatic paper splicing assembly of a paper tube forming machine according to any one of claims 1 to 3, characterized in that: The vertical slide rail (10) is fixed to the front wall of the fixed base plate (7) via a lifting and sliding seat (25).

6. The automatic paper splicing assembly of a paper tube forming machine according to any one of claims 1 to 3, characterized in that: The front end of the positioning support plate (1) is provided with a clearance groove (26) that cooperates with the cutting knife (5).

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