Automatic raw material feeding structure

Abstract

The utility model discloses an automatic raw material feeding structure which comprises a base, an unwinding assembly and two material receiving units. The base is provided with an unwinding assembly used for unwinding a new material belt and an old material belt, two material receiving units which are arranged side by side and used for connecting the new material belt and the old material belt into a whole are connected to the base in a sliding mode, and the two material receiving units can move in the opposite direction or the back-to-back direction. A first magnetic part and a second magnetic part are arranged on the inner sides of the two material receiving units respectively, and when the two material receiving units are combined to make contact with a new material belt and an old material belt, the first magnetic part and the second magnetic part are matched in a magnetic attraction mode. Under the magnetic attraction force of the first magnetic part and the second magnetic part, the situation that the two material receiving units are separated due to the opposite force of the cutter during cutting operation is avoided, it is guaranteed that the material belts are cut completely and thoroughly, and it is guaranteed that automatic material receiving and changing operation of new and old material belts is conducted smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of die-cutting equipment, in particular to an automatic raw material feeding structure. Background Art

[0002] Circular die cutting machine, also known as rotary machine, is commonly known as circular knife machine, rolling cutter machine or multi-station rotary die cutting machine. It is mainly used for die cutting (full cutting, half cutting), creasing and hot stamping, laminating, automatic waste discharge and other operations of some corresponding non-metallic materials, self-adhesive, EVA, double-sided adhesive, electronics, mobile phone pads, etc. The die-cut products are widely used in mobile phones, computers, LCD monitors, digital cameras, LCD backlights and other fields.

[0003] At present, the commonly used die-cutting machine can only place one material roll at a time at the material feed. When the material roll is used up, the two side-by-side cutting rollers are controlled by the screw assembly to approach each other, and the new and old material strips pass downward through the gap formed between the two cutting rollers. Then, by controlling the two cutting rollers to rotate in opposite directions, the cutters on the cutting rollers cut off the new and old material strips at the same time, and then the film set on the surface is attached to the joint of the new and old material strips by the pressure roller, so that the new and old material strips can be automatically connected and replaced without stopping the machine. During the above cutting operation, the two cutting rollers rotate in opposite directions to cut the material strip, which will generate a large outward force. For some thicker and harder material strips, the outward impact force generated during cutting is greater, and the two cutting rollers move outward and apart, resulting in incomplete cutting of the material strip, and the automatic connection and replacement of the new and old material strips cannot be carried out smoothly. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned background technology, the purpose of the utility model is to provide an automatic feeding structure for raw materials, which effectively prevents the two material receiving units from being separated by the reverse force of the cutter during the cutting operation, thereby ensuring that the material belt is cut completely and thoroughly, and ensuring the smooth automatic receiving and replacing operations of the new and old material belts.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a raw material automatic feeding structure, comprising a base, an unwinding component and two material receiving units;

[0007] The base is provided with an unwinding assembly for unwinding the new and old material strips respectively, and the base is slidably connected with two material receiving units arranged side by side for connecting the new and old material strips into one, and the two material receiving units can move in opposite directions or in opposite directions;

[0008] A first magnetic component and a second magnetic component are respectively provided on the inner sides of the two material receiving units. When the two material receiving units are combined and contact the new and old material belts, the first magnetic component and the second magnetic component are magnetically attracted to each other.

[0009] A further improvement is that it also includes a linear slide rail assembly, a linear sliding drive assembly and two drive assemblies, the two material receiving units are respectively slidably arranged on the linear slide rail assemblies located on the base, the driving ends of the linear sliding drive assemblies are respectively connected to the two material receiving units, the two drive assemblies are respectively installed on two mounting plates, the mounting plates are connected to the corresponding material receiving units, and the output ends of the drive assemblies respectively drive the rollers in the material receiving units; the linear slide rail assembly includes at least two groups of linear slide rail parts, one of which includes two linear slide rails, the two linear slide rails are installed back to back on the base, one of the linear slide rails is respectively slidably connected to the two material receiving units, and the other linear slide rail is respectively slidably connected to the two mounting plates.

[0010] In order to further enhance the rigidity of the material receiving unit, two linear slide rails are installed on the base in a back-to-back manner, wherein one of the linear slide rails is slidingly connected to the two material receiving units respectively, and the other linear slide rail is slidingly connected to the two mounting plates respectively, thereby further increasing the rigidity of the two material receiving units when moving. The material receiving units move more smoothly, preventing the two material receiving units from being separated due to force during the cutting operation, thereby ensuring that the material belt is cut completely and thoroughly, and ensuring the smooth automatic receiving and replacing operations of the new and old material belts.

[0011] A further improvement is that a plurality of the first magnetic members and a plurality of the second magnetic members are respectively provided from top to bottom on one end of the inner side surface of the outer frame of the two receiving units away from the base.

[0012] Since the end of the outer frame of the material receiving unit close to the base is directly slidably connected to the linear slide rail assembly, the support strength at this end is sufficient and the rigidity is strong, and it is not easy to separate when subjected to external force. The support strength at the end of the outer frame of the two material receiving units away from the base is weakened, and the rigidity at this end is poor, and it is easy to separate when subjected to external force. In order to better utilize the magnetic attraction generated between the magnetic parts of the two material receiving units, the magnetic parts are installed to the end of the inner side of the outer frame of the material receiving unit away from the base. Under the same conditions, the rigidity of the material receiving unit can be maximized, effectively preventing the two material receiving units from separating during cutting operations.

[0013] A further improvement is that the material receiving unit includes an outer frame, one end of which is slidably mounted on the linear slide rail assembly, and the inside of the outer frame is sequentially mounted with a first pressure roller, a cutting roller, a suction pressure roller and a second pressure roller along the conveying direction of the new and old material belts.

[0014] During specific operation, the joint of the new material roll naturally hangs down between the two material receiving units. When the old material roll is unwound to the point where the old material tape is about to run out and needs to be replaced, the two material receiving units are controlled to move toward each other and approach each other, and the new material roll begins to continuously unwind and convey the new material tape. The new and old material tapes released by the two material receiving units are conveyed downward synchronously, and the new and old material tapes are pressed tightly and flatly by the rotation cooperation of the two first pressure rollers, ensuring the flatness of the cutting edge when the cutting knife roller cuts the new and old material tapes. When the end of the new material tape is conveyed to the position below the cutting knife roller, the new and old material tapes are cut by the blades on the cutting knife roller at the same time as the two cutting knife rollers rotate and cooperate. The old material roll stops unwinding and conveying outwards, the cutting port of the new material belt located above is aligned with the cutting port of the old material belt located below (that is, the joint of the new and old material belts), and is conveyed downward to the suction type pressing roller, the film on the suction type pressing roller is adhered to both sides of the joint of the new and old material belts, and the film is adhered and pressed tightly at the joint of the new and old material belts through the rotation cooperation of the two second pressing rollers, and the new and old material belts are joined to form a whole, and then the two splicing units are controlled to move back to back and away from each other, the new material roll is fed normally, the old material roll that has stopped feeding is taken down and replaced with the new material roll, and the above steps are repeated to realize the function of automatic splicing without stopping the machine.

[0015] A further improvement is that a blade is installed on the cutting roller in one of the material receiving units, and a knife line protruding outward is integrally formed on the outer side of the blade, while a blade is not installed on the cutting roller in the other material receiving unit, and the cutting roller without a blade is similar to the structure of an ordinary pressure roller.

[0016] In the prior art, the cutter is integrally formed on the outer surface of the cutter roller, and the edge of the cutter contacts the material belt for cutting. The cutting force is limited, and for thicker hard material belts, it is impossible to ensure that both the new and old material belts can be cut at the same time. By adopting a structure in which the knife line protrudes outward and is integrally formed on the blade, the two cutter rollers rotate and cooperate, and sufficient cutting force is formed when the knife line contacts the material belt, which is suitable for cutting thicker hard material belts, thereby improving the application range of the equipment. It is also due to the structure of the blade and the knife line on the cutter roller that when it contacts the material belt for cutting, the outward impact force acting on the material receiving unit is greater. If no special structure is provided, the two material receiving units are easily moved outward and separated by force.

[0017] Specifically, a matching blade is installed on the outer side of the cutter roller by magnetic attraction, ensuring that the blade is tightly attached to the outer side of the cutter roller after installation, and there is no installation gap between the two. The blade and the outer side of the cutter roller are fixed and installed by locking bolts at both ends, which is convenient for regular replacement of the cutter. When the blade is in a flattened state, the knife line is inclined. At this time, the angle formed between the length direction of the knife line and the axial direction of the cutter roller is about 1 degree. The force is stable during cutting, the material incision is inclined, the lateral force of the material is increased, and it is easy to break.

[0018] A further improvement is that the outer side of the cutting roller is wrapped with an elastic layer, and the outer side of the blade located on the cutting line side is also provided with an elastic layer.

[0019] In actual use, the two cutting rollers are used in conjunction with each other. After the blades cut the new and old materials at the same time, the elastic layers on the outside of the two cutting rollers are used to clamp the joint ends of the new and old material belts after cutting, and the joints of the new and old material belts are smoothly connected and moved downward to the next location for processing, so as to facilitate the subsequent sticking of tape on both sides of the joints of the new and old material belts to form a flat whole, thereby preventing the new and old material belts from falling directly under the action of gravity after being cut.

[0020] Specifically, an elastic layer (such as rubber or foam) is bonded to the outer side of the blade, and the thickness of the elastic layer is equal to or slightly less than the thickness of the knife line. Through the arrangement, it can be further ensured that the joint of the new and old material strips after cutting is clamped.

[0021] A further improvement is that a material baffle plate arranged along the axial direction of the cutter roller is installed on the inner side surface of the outer frame, and the material baffle plate is located between the cutter roller and the suction pressure roller.

[0022] The cut-off part of the joint of the new material belt is blocked by the blocking plate and separated from the joint of the new and old material belts to avoid affecting the subsequent pasting of the film.

[0023] A further improvement is that the two linear guide rails mounted back to back are located close to the cutting roller.

[0024] Because the reverse force at this location is the largest when the two cutting rollers cooperate to cut off the new and old material belts, two linear guide rails installed back to back are installed at this location. Under the same conditions, the rigidity of the two material receiving units when moving is increased to the greatest extent.

[0025] A further improvement is that the first pressing roller is a rubber roller, and the second pressing roller is a suction type rubber roller.

[0026] A further improvement is that a guide assembly for orienting the new and old material strips and guiding them respectively between the two material receiving units is provided between the unwinding assembly and the material receiving unit.

[0027] The new and old material strips unwound by the unwinding assembly are respectively directed to be reversingly directed between the two material receiving units by the guiding assembly. The guiding assembly can adopt a structural assembly with a reversing guiding function in the prior art.

[0028] A further improvement is that the unwinding assembly includes two unwinding shafts, which are installed side by side on the base, and a positioning assembly is installed on the outer side of the unwinding shaft for cooperating with the side surface of the raw material roll to perform Y-direction (i.e., along the axial direction of the unwinding shaft) positioning, and the positioning assembly can be adjusted along the axial direction of the unwinding shaft.

[0029] Specifically, the positioning component can adopt a structure in which a limit block, a locking member and a material baffle plate cooperate, and the positioning component can be used to accurately position the position of the material roll installed on the unwinding shaft in the Y direction. The installation position of the positioning component can also be adjusted according to actual processing needs and the specifications of the material roll, thereby adjusting the position of the material roll installed on the unwinding shaft, so that the unwound material belt enters between the two material receiving units at the optimal position for material switching operations.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] In the utility model, a first magnetic part and a second magnetic part are respectively provided at the inner sides of the two material receiving units. When the two material receiving units are combined and the cutters on the internal cutting rollers cut the new and old material strips, the magnetic attraction of the first magnetic part and the second magnetic part ensures that the two material receiving units will not be separated due to the reverse force of the cutters during the cutting operation, thereby ensuring that the material strips are completely and thoroughly cut and ensuring the smooth automatic material connection and replacement operation of the new and old material strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figure 1 It is a schematic diagram of the local structure of the discharge unit in the utility model;

[0034] Figure 2 It is a partial structural schematic diagram of the back side of the base in the utility model;

[0035] Figure 3 It is a schematic diagram of the local structure of the linear sliding drive assembly in the utility model;

[0036] Figure 4 It is a structural schematic diagram of the unwinding component and the positioning component in the utility model;

[0037] Figure 5 It is a schematic diagram of the split structure of the discharge shaft in the utility model;

[0038] Figure 6 It is a structural schematic diagram of one of the material receiving units in the utility model;

[0039] Figure 7It is a structural schematic diagram of another material receiving unit in the utility model;

[0040] Figure 8 This is a schematic diagram of the overall structure of the automatic raw material feeding structure in the utility model;

[0041] Among them, the specific drawings are marked as:

[0042] Base 1, unwinding assembly 2, unwinding shaft 3, positioning assembly 4, guide assembly 5, material receiving unit 6, outer frame 7, first magnetic member 8, second magnetic member 9, first pressure roller 10, cutting roller 11, blade 12, knife line 13, suction pressure roller 14, second pressure roller 15, material baffle plate 16, linear slide rail assembly 17, linear slide rail 18, linear sliding drive assembly 19, mounting plate 20, drive assembly 21, fixed guide roller 22, movable guide roller 23. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] like Figures 1 to 4 , Figure 8 As shown, a raw material automatic feeding structure includes a base 1, an unwinding assembly 2, two material receiving units 6, two driving assemblies 21, a linear slide rail assembly 17 and a linear sliding driving assembly 19;

[0045] An unwinding assembly 2 and a linear slide assembly 17 for unwinding the new and old material strips are installed on the base 1. Two receiving units 6 for connecting the new and old material strips into one are slidably arranged side by side on the linear slide assembly 17. The driving ends of the linear sliding drive assembly 19 are respectively connected to the two receiving units 6, which drive the two receiving units 6 to move in opposite directions. In a specific embodiment, the linear sliding drive assembly 19 is a screw transmission assembly. Two driving assemblies 21 are respectively installed on two mounting plates 20. The upper and lower ends of the mounting plates 20 are connected to the corresponding ends of the receiving units 6. The output ends of the driving assembly 21 respectively drive the rollers in the connecting material units 6. The driving assembly 21 can select a structure in which multiple servo motors, reducers and couplings cooperate, which respectively control the rotation of one or several rollers in the receiving material units 6.

[0046] The linear slide assembly 17 includes at least two groups of linear slide components, one group of linear slide components includes two linear slides 18, and the two linear slides 18 are installed back to back on the base 1. The linear slide 18 installed on the front side of the base 1 is slidably connected to the two material receiving units 6 respectively, and the linear slide 18 installed on the back side of the base 1 is slidably connected to the two mounting plates 20 respectively. The other group of linear slide components is only equipped with one linear slide 18, which is installed on the front side of the base 1 and is slidably connected to the two mounting plates 20 respectively.

[0047] Two linear slide rails 18 are installed on the base 1 in a back-to-back manner, wherein one of the linear slide rails 18 is slidably connected to the two material receiving units 6, and the other linear slide rail 18 is slidably connected to the two mounting plates 20, respectively. This increases the rigidity of the two material receiving units 6 when they move, making the equipment more stable during operation and preventing the two material receiving units 6 from being separated due to force during the cutting operation, thereby ensuring that the material belt is cut completely and thoroughly and ensuring the smooth automatic connection and replacement of the new and old material belts.

[0048] like Figure 6 and Figure 7 As shown, in order to further enhance the rigidity of the material receiving unit 6, the first magnetic member 8 and the second magnetic member 9 are respectively provided on the inner side of the two material receiving units 6; when the two material receiving units 6 are combined and contact the new and old material belts, the first magnetic member 8 and the second magnetic member 9 are magnetically attracted to each other; when the two material receiving units 6 are separated, the magnetic connection between the first magnetic member 8 and the second magnetic member 9 is disconnected. When the two material receiving units 6 are combined, when the cutter on the cutting roller 11 inside them cuts off the new and old material belts, the magnetic attraction of the first magnetic member 8 and the second magnetic member 9 ensures that the two material receiving units 6 will not be separated due to the reverse force of the cutter. Specifically, the first magnetic member 8 and the second magnetic member 9 can both be magnets, or can be electromagnets or a combination of magnets and ferromagnetic metals.

[0049] Specifically, the inner side surface of the outer frame 7 of the two material receiving units 6 is provided with a plurality of first magnetic parts 8 and a plurality of second magnetic parts 9 from top to bottom at one end away from the base 1. Since the outer frame 7 of the material receiving unit 6 is directly connected to the linear guide rail assembly 17 in a sliding manner at one end close to the base 1, the support strength at this end is sufficient and the rigidity is strong, and it is not easy to separate when subjected to external force. The support strength at the end of the outer frame 7 of the two material receiving units 6 away from the base 1 is weakened, and the rigidity at this end is poor, and it is easy to separate when subjected to external force. In order to better utilize the magnetic attraction generated between the magnetic parts of the two material receiving units 6, the magnetic parts are installed to the inner side surface of the outer frame 7 of the material receiving unit 6 at one end away from the base 1. Under the same conditions, the rigidity of the material receiving unit 6 can be enhanced to the maximum extent, and the separation between the two material receiving units 6 during cutting operations can be effectively prevented.

[0050] Among them, the material receiving unit 6 includes an outer frame 7, one end of the outer frame 7 is slidably installed on a linear slide rail assembly 17, and the inside of the outer frame 7 is sequentially installed with a first pressure roller 10, a cutting roller 11, a suction pressure roller 14 and a second pressure roller 15 along the conveying direction of the new and old material belts. The first pressure roller 10 is a rubber roller, and the second pressure roller 15 is a suction rubber roller. During specific operation, the joint of the new material roll naturally hangs down between the two material receiving units 6. When the old material roll is unwound to the point where the old material belt is about to run out and needs to be replaced, the two material receiving units 6 are controlled to move toward each other and approach each other, and the new material roll begins to continuously unwind and convey the new material belt. The new and old material belts released by the two material receiving units 6 are synchronously conveyed downward, and the new and old material belts are pressed tightly and flatly by the rotation cooperation of the two first pressure rollers 10, ensuring the flatness of the cutting edge when the cutting roller 11 cuts the new and old material belts. When the end of the new material belt is conveyed to the position below the cutting roller 11, as the two cutting rollers 11 rotate and cooperate, the new and old material belts are simultaneously cut by the knife on the cutting roller 11 The film 12 is cut off, the old material roll stops being unwound and transported outward, the cutting port of the new material belt located at the top is aligned with the cutting port of the old material belt located at the bottom (that is, the joint of the new and old material belts), and when it is transported downward to the suction type pressing roller 14, the film on the suction type pressing roller 14 is adhered to both sides of the joint of the new and old material belts, and the two second pressing rollers 15 are rotated and cooperated to adhere and press the film at the joint of the new and old material belts, and the new and old material belts are joined to form a whole, and then the two splicing units 6 are controlled to move back to back and away from each other, the new material roll is fed normally, the old material roll that has stopped feeding is taken down and replaced with the new material roll, and the above operation steps are repeated to realize the function of automatic splicing without stopping the machine.

[0051] Specifically, a blade 12 is installed on the cutting roller 11 in one of the material receiving units 6, and a knife line 13 protruding outward is integrally formed on the outer side of the blade 12. The blade 12 is not installed on the cutting roller 11 in the other material receiving unit 6. The cutting roller without a blade is similar to the structure of an ordinary pressure roller. In the prior art, the cutting knife is integrally formed on the outer surface of the cutting roller 11, and the edge of the cutting knife contacts the material belt for cutting. Its cutting force is limited. For thicker hard material belts, it cannot ensure that the new and old material belts are cut at the same time. By adopting a structure in which an integrally formed outwardly protruding knife line 13 is set on the blade 12, the two cutting rollers 11 rotate in coordination, and the knife line 13 forms sufficient cutting force when it contacts the material belt, which is suitable for cutting thicker hard material belts, thereby improving the application range of the equipment. It is also due to the coordinated structure of the blade 12 and the knife line 13 on the cutting roller 11 that when it contacts the material belt for cutting, the outward impact force acting on the material receiving unit 6 is greater. If no special structure is provided, the two material receiving units 6 are easily moved outward and separated by force.

[0052] In a specific embodiment, a matching blade 12 is magnetically mounted on the outer side of the cutting roller 11, ensuring that the blade 12 is tightly attached to the outer side of the cutting roller 11 after installation, and no installation gap is generated therebetween. The blade 12 and the outer side of the cutting roller 11 are fixedly mounted by locking bolts, making it convenient to replace the blade 12. When the blade 12 is in a flattened state, the knife line 13 is inclined. At this time, the angle formed between the length direction of the knife line 13 and the axial direction of the cutting roller 11 is about 1 degree. The force is stable during cutting, the material incision is inclined, the lateral force of the material is increased, and it is easy to break.

[0053] In a specific embodiment, the outer side of the cutting roller 11 is wrapped with an elastic layer, and the outer side of the blade 12 located on one side of the knife line 13 is also provided with an elastic layer. In actual use, the two cutting rollers 11 are used in combination, and after the blade 12 cuts the new and old materials at the same time, the elastic layers on the outer sides of the two cutting rollers 11 are used to clamp the joint ends of the new and old material strips after cutting, and the joints of the new and old material strips are smoothly docked and moved downward to the next location for processing, so as to facilitate the subsequent application of tape on both sides of the joint of the new and old material strips to form a flat whole, so as to prevent the new and old material strips from falling directly under the action of gravity after cutting. Specifically, an elastic layer (such as rubber or foam) is bonded to the outer side of the blade 12, and the thickness of the elastic layer is equal to or slightly less than the thickness of the knife line 13. Through the setting, it can be further ensured that the joints of the new and old material strips after cutting are clamped.

[0054] In a specific embodiment, a baffle plate 16 is installed on the inner side of the outer frame 7 along the axial direction of the cutter roller 11, and the baffle plate 16 is located between the cutter roller 11 and the suction type pressure roller 14. The cut-off part of the joint of the new material belt is blocked by the baffle plate 16 and separated from the joint of the new and old material belts, so as to avoid affecting the subsequent pasting of the film.

[0055] In a specific embodiment, two linear guide rails 18 mounted back to back are located near the cutter roller 11. Since the reverse force is the largest at this location when the two cutter rollers 11 cooperate to cut the new and old material belts, the two linear guide rails 18 mounted back to back are installed at this location to maximize the rigidity of the two material receiving units 6 when moving under the same conditions.

[0056] Among them, Figure 4As shown, a guide assembly 5 for guiding the new and old material strips to the two material strips 6 is provided between the unwinding assembly 2 and the material strip receiving unit 6. The new and old material strips unwound by the unwinding assembly 2 are respectively directed to the two material strip receiving units 6 by the guide assembly 5. The guide assembly 5 can adopt a structural assembly with a reversing guide function in the prior art. Specifically, the guide assembly 5 includes a fixed guide roller 22 and a movable guide roller 23, wherein the movable guide roller 23 is located between the two fixed guide rollers 22, and the movable guide roller 23 is located close to the material strip receiving unit 6.

[0057] Among them, Figure 4 and Figure 5 As shown, the unwinding assembly 2 includes two unwinding shafts 3, which are installed side by side on the base 1. A positioning assembly 4 is installed on the outer side of the unwinding shaft 3 to cooperate with the side surface of one side of the raw material roll for Y-direction positioning. The positioning assembly 4 can be adjusted along the axial direction of the unwinding shaft 3. Specifically, the positioning assembly 4 can adopt a structure in which a limit block, a locking member and a material blocking disc cooperate. The position of the material roll installed on the unwinding shaft 3 is accurately positioned in the Y direction through the positioning assembly 4. The installation position of the positioning assembly 4 can also be adjusted according to the actual processing needs and the specifications of the material roll, thereby adjusting the position of the material roll installed on the unwinding shaft 3, so that the unwound material belt enters between the two material receiving units 6 at the best position for the material exchange operation.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw material automatic feeding structure, characterized in that: It comprises a base (1), an unwinding assembly (2) and two material receiving units (6); The base (1) is provided with an unwinding assembly (2) for unwinding the new and old material strips respectively, and the base is slidably connected with two material receiving units (6) arranged side by side for connecting the new and old material strips into one, and the two material receiving units (6) can move in opposite directions or in opposite directions; A first magnetic component (8) and a second magnetic component (9) are respectively provided on the inner sides of the two material receiving units (6); when the two material receiving units (6) are combined and contact the new and old material belts, the first magnetic component (8) and the second magnetic component (9) are magnetically attracted to each other.

2. The automatic raw material feeding structure according to claim 1 is characterized in that: It also includes a linear slide rail assembly (17), a linear sliding drive assembly (19) and two drive assemblies (21), wherein the two material receiving units (6) are respectively slidably arranged on the linear slide rail assembly (17) located on the base (1), the driving end of the linear sliding drive assembly (19) is respectively connected to the two material receiving units (6), the two drive assemblies (21) are respectively mounted on two mounting plates (20), the mounting plates (20) are connected to the corresponding material receiving units (6), and the output ends of the drive assemblies (21) are respectively driven to connect the roller bodies in the material receiving units (6); the linear slide rail assembly (17) includes at least two groups of linear slide rail parts, wherein one group of linear slide rail parts includes two linear slide rails (18), the two linear slide rails (18) are mounted back to back on the base (1), one of the linear slide rails (18) is respectively slidably connected to the two material receiving units (6), and the other linear slide rail (18) is respectively slidably connected to the two mounting plates (20).

3. The automatic raw material feeding structure according to claim 2 is characterized in that: A plurality of the first magnetic members (8) and a plurality of the second magnetic members (9) are respectively provided from top to bottom on the inner side surfaces of the outer frames (7) of the two material receiving units (6) at one end away from the base (1).

4. The automatic raw material feeding structure according to claim 2 or 3, characterized in that: The material receiving unit (6) comprises an outer frame (7), one end of the outer frame (7) is slidably mounted on the linear guide rail assembly (17), a cutting roller (11) is provided inside the outer frame (7) of the material receiving unit (6), a blade (12) is mounted on the cutting roller (11), and a knife line (13) protruding outward is provided on the outer side of the blade (12), wherein the cutting roller (11) in one of the outer frames of the material receiving unit (6) is not mounted with a blade (12).

5. The automatic raw material feeding structure according to claim 4 is characterized in that: The outer side of the cutting roller (11) is wrapped with an elastic layer, and the outer side of the blade (12) located on the side of the cutting line (13) is also provided with an elastic layer.

6. The automatic raw material feeding structure according to claim 4 is characterized in that: The two linear slide rails (18) mounted back to back are located close to the cutting roller (11).

7. The automatic raw material feeding structure according to claim 4 is characterized in that: The material receiving unit further comprises a first pressing roller (10), a suction pressing roller (14) and a second pressing roller (15); the first pressing roller (10), a cutting roller (11), a suction pressing roller (14) and a second pressing roller (15) are sequentially installed inside the outer frame along the conveying direction of the new and old material belts.

8. The automatic raw material feeding structure according to claim 7, characterized in that: The first pressing roller (10) is a rubber roller, and the second pressing roller (15) is a suction type rubber roller.

9. The automatic raw material feeding structure according to claim 1, characterized in that: A guide assembly (5) is provided between the unwinding assembly (2) and the material receiving unit (6) for respectively directing the new and old material strips between the two material receiving units (6); the guide assembly (5) comprises a fixed guide roller (22) and a movable guide roller (23); the movable guide roller (23) is located between the two fixed guide rollers (22); and the movable guide roller (23) is located close to the material receiving unit (6).

10. The automatic raw material feeding structure according to claim 1, characterized in that: The unwinding assembly (2) comprises two unwinding shafts (3), which are mounted side by side on the base (1). A positioning assembly (4) is mounted on the outer side of the unwinding shaft (3) for cooperating with the side surface of the raw material roll for Y-direction positioning. The positioning assembly (4) can be adjusted in position along the axial direction of the unwinding shaft (3).

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