Glue backflow device for printing machine

Abstract

The utility model relates to the field of packaging bag production, in particular to a glue backflow device for a printing machine, which comprises a funnel for collecting dripped glue and a recovery port communicated with a glue recovery pool, a backflow box is arranged between the funnel and the recovery port, a backflow pipe in the backflow box is used for communicating the funnel and the recovery port, and the backflow pipe is a deformable hose; an extrusion shaft which advances in the flowing direction of glue in the backflow pipe and extrudes the backflow pipe is arranged in the backflow pipe, the axis of the extrusion shaft is perpendicular to a pipe body of the backflow pipe, and a heating assembly is arranged on the contact face of the extrusion shaft and the backflow pipe. The glue is prevented from being condensed in the pipeline while being recycled, and the pipeline does not need to be cleaned manually and regularly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of packaging bag production, and specifically relates to a glue backflow device for printing machine. BACKGROUND

[0002] In the printing operation, extrusion (extrusion lamination) is usually carried out in a step after printing, especially when making laminated packaging bags; during the extrusion operation, first, the glue is adhered by using a mesh roller, then the excess glue on the surface of the mesh roller is scraped off by using a scraper, and the glue on the surface of the mesh roller is uniformly distributed, and finally the mesh roller is in contact with the substrate to be coated, and the substrate is coated with glue. Among them, the length direction of the blade body of the scraper is consistent with the roller length direction of the mesh roller, and the excess glue scraped by the scraper falls downward in part and flows to the both ends of the mesh roller along the length direction of the blade body. Since the outer periphery of the both ends of the mesh roller is not arranged with mesh, it does not participate in the operation of adhering and coating glue, and the glue is easy to leak and waste.

[0003] In order to realize the recycling of the glue, as described in the publication number "CN215390485U", the glue dripping from the both ends of the mesh roller is received by the cutter box, and the glue is recycled and reused by using the circulating pipeline of the recycling device; however, during the actual recycling process, part of the glue may condense in the circulating pipeline when the glue passes through the circulating pipeline, the circulating pipeline may be easily blocked after a long time of work, and the circulating pipeline needs to be cleaned regularly by manual operation, so it is urgent to solve. UTILITY MODEL CONTENT

[0004] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a glue backflow device for printing machine. The utility model avoids the condensation of glue in the pipeline while recycling the glue, and does not need to clean the pipeline regularly by manual operation.

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

[0006] A glue backflow device for printing machine, comprising a hopper for collecting dripping glue and a recycling port in communication with a glue recycling pool, a backflow box is arranged between the hopper and the recycling port, a backflow pipe in the backflow box communicates the hopper and the recycling port, and the backflow pipe is a deformable hose; an extrusion shaft is arranged in the backflow box and moves along the flow direction of the glue in the backflow pipe and extrudes the backflow pipe, the axis of the extrusion shaft is arranged perpendicularly to the pipe body of the backflow pipe, and the contact surface of the extrusion shaft and the backflow pipe is provided with a heating assembly.

[0007] As a further scheme of the utility model: a ring-shaped guide groove is formed on the box body of the backflow box, the diameter of the extrusion shaft corresponds to the groove width of the guide groove, one end of the extrusion shaft is inserted into the guide groove and is driven to move circularly along the length direction of the guide groove by a power source, and the movement trajectory of the extrusion shaft along one segment of the guide groove intersects with the backflow pipe to extrude the backflow pipe.

[0008] As a further scheme of the utility model: the power source is a walking motor, the motor shaft of the walking motor is coaxially fixed with the extrusion shaft, a guide groove is arranged on the wall of one side of the return flow box, a motor guide rail corresponding in position with the guide groove is arranged on the wall of the other side of the return flow box, and the motor seat of the walking motor is in sliding fit with the motor guide rail; a guide gear is coaxially arranged on the extrusion shaft, a guide rack is arranged in the return flow box, and the guide gear and the guide rack are in gear and rack fit to drive the extrusion shaft to move along the guide groove.

[0009] As a further scheme of the utility model: the guide gear is provided with two groups and is symmetrically arranged on both sides of the return flow pipe, and the number of the guide racks corresponds to the number of the guide gears.

[0010] As a further scheme of the utility model: one end of the extrusion shaft is coaxially provided with a roller adjacent to the guide groove, the roller is in clamping fit with the guide groove, and the extrusion shaft rolls along the guide groove through the roller.

[0011] As a further scheme of the utility model: the heating assembly comprises an electric heating roller coaxially arranged on the extrusion shaft, and a guide table is vertically arranged in the return flow box, the surface of the guide table is provided with an opening along the vertical direction for clamping the return flow pipe, the electric heating roller corresponds to the opening position of the guide table, and the width of the electric heating roller is less than the opening width of the guide table.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] 1. The extrusion shaft extrudes the return flow pipe along the glue recovery flow direction, and the glue in the return flow pipe is hot-melted through the electric heating roller at the same time, so that the glue in the return flow pipe is completely discharged and collected in a hot-melt and extrusion mode, the glue is prevented from condensing in the pipeline, and the pipeline does not need to be cleaned regularly.

[0014] 2. When the walking motor drives the extrusion shaft and the guide gear rotates, the extrusion shaft is double-guided through the motor guide rail and the guide groove, the extrusion shaft can only produce a circular motion track along the guide groove under the guide action, and the gear and rack cooperation serves as a power source for the forward movement of the extrusion shaft.

[0015] 3. The extrusion shaft is provided with a roller at the end, the roller is in rolling fit with the guide groove, and the friction in the movement process is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1The structural schematic diagram of the utility model.

[0017] Fig. 2 The advancing trajectory schematic diagram of the extrusion shaft along the guide groove of the utility model.

[0018] In the drawing,

[0019] 1, return box; 11, guide groove; 12, recovery port;

[0020] 13, guide rack; 14, guide table; 15, motor guide rail;

[0021] 2, funnel; 3, return pipe;

[0022] 4, extrusion shaft; 41, guide gear; 42, walking motor; 43, roller;

[0023] 44, motor base; 45, electric heating roller. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Please refer to Figs. 1-2 In the embodiments of the utility model, a glue return device for printing machine includes funnel 2, which is located directly below the glue dripping point of the printing machine mesh roller. The recovered glue is discharged to the return pipe 3 through the funnel 2, and then enters the buried glue recovery tank through the recovery port 12 at the tail end of the return pipe 3.

[0026] The funnel 2 is fixed directly above the return box 1, and the return pipe 3 passes through the box body of the return box 1 along the vertical direction. The guide table 14 is vertically arranged on the wall of the return box 1, and the surface of the guide table 14 away from the wall is provided with an opening vertically arranged, which is used for clamping the return pipe 3, and the return pipe 3 is a deformable flexible hose.

[0027] A guide groove 11 is formed on one side wall of the return box 1, and the guide groove 11 includes two parallel grooves and two vertical grooves. The adjacent two groove bodies are smoothly transitioned through the arc-shaped groove, so that the guide groove 11 is arranged in the shape of a "mouth" character.

[0028] The motor guide rail 15 is arranged on the wall of the return box 1 opposite to the guide slot 11 and corresponds to the front and back positions of the guide slot 11. The walking motor 42 is installed on the motor guide rail 15 through the motor seat 44 and can slide along the motor guide rail 15. The walking track corresponds to the length of the guide slot 11 and is annular.

[0029] The extrusion shaft 4 is coaxially fixed on the motor shaft of the walking motor 42. The shaft body of the extrusion shaft 4 is horizontally arranged and the axis is perpendicular to the axis of the return pipe 3. The roller 43 is coaxially arranged on the end of the extrusion shaft 4 away from the walking motor 42. The roller 43 is clamped into the guide slot 11. When the walking motor 42 moves along the motor guide rail 15, the roller 43 rolls in the guide slot 11.

[0030] The guide rack 13 is annularly arranged on the wall of the return box 1. The arrangement track of the guide rack 13 is proportionally enlarged compared with the guide slot 11. The guide gear 41 is coaxially arranged on the shaft body of the extrusion shaft 4 and cooperates with the guide rack 13.

[0031] When the walking motor 42 drives the extrusion shaft 4 and the guide gear 41 to rotate, the extrusion shaft 4 is double-guided by the motor guide rail 15 and the guide slot 11. Under the guide action, the extrusion shaft 4 can only produce an annular motion track along the guide slot 11. In this process, the gear-rack cooperation serves as the power source for the forward movement of the extrusion shaft 4. In the working state, when the extrusion shaft 4 passes through the vertical slot of the guide slot 11, it just rolls from top to bottom through the pipe body of the return pipe 3. In cooperation with the guide table 14, the return pipe 3 is flattened and the glue in the return pipe 3 is extruded downward. The guide rack 13 is preferably arranged in two groups and distributed on both sides of the guide table 14. In the non-working state, the walking motor 42 stays in the horizontal section of the guide slot 11 to avoid the load on the motor shaft. The walking motor 42 is started at intervals under the set program. Each time the walking motor 42 is started, it completely passes through the guide slot 11 and completes one extrusion and glue discharge operation.

[0032] The electric heating roller 45 is coaxially arranged on the extrusion shaft 4. The electric heating roller 45 is embedded with resistance wires and corresponds to the position of the return pipe 3 to melt the solidified glue in the return pipe 3 in an electric heating manner. The width of the electric heating roller 45 is smaller than the opening width of the guide table 14. When the extrusion shaft 4 passes through the return pipe 3 from top to bottom, the roller body of the electric heating roller 45 is inserted into the opening of the guide table 14, so that the return pipe 3 is flattened and the glue in the return pipe is discharged in a hot extrusion manner.

[0033] The basic principles of the application are described above by way of example in connection with specific embodiments, but it should be noted that the advantages, benefits, effects and the like mentioned in the present application are only examples and are not intended to be limiting, and it cannot be considered that these advantages, benefits, effects and the like are necessarily possessed by each embodiment of the present application. In addition, the specific details of the above disclosure are only for the purpose of example and for the purpose of understanding, and are not limiting, and the above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0034] The block diagrams of the devices, apparatuses, equipment, systems involved in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be as shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any manner. Words such as "include", "contain", "have" and the like are open-ended words, mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

Claims

1. A glue recirculation device for a printing press, characterized in that, It includes a funnel (2) for collecting dripping glue and a recycling port (12) connected to a glue recycling tank. A return box (1) is provided between the funnel (2) and the recycling port (12). A return pipe (3) in the return box (1) connects the funnel (2) and the recycling port (12). The return pipe (3) is a deformable hose. A squeezing shaft (4) is provided in the return box (1) to travel along the glue flow direction in the return pipe (3) and squeeze the return pipe (3). The axis of the squeezing shaft (4) is arranged perpendicular to the body of the return pipe (3). A heating component is provided on the contact surface between the squeezing shaft (4) and the return pipe (3).

2. The glue recirculation device for a printing press according to claim 1, characterized in that, The return box (1) has an annular guide groove (11) on its body. The diameter of the extrusion shaft (4) corresponds to the width of the guide groove (11). One end of the extrusion shaft (4) is inserted into the guide groove (11) and driven by the power source to move cyclically along the length of the guide groove (11). The movement trajectory of the extrusion shaft (4) along one section of the guide groove (11) intersects with the return pipe (3) to extrude the return pipe (3).

3. The glue recirculation device for a printing press according to claim 2, characterized in that, The power source is a walking motor (42). The motor shaft of the walking motor (42) is coaxially fixed with the extrusion shaft (4). The guide groove (11) is opened on one side of the box wall inside the return box (1). The other side of the box wall inside the return box (1) is provided with a motor guide rail (15) arranged in a ring and corresponding to the position of the guide groove (11). The motor seat (44) of the walking motor (42) is slidably engaged with the motor guide rail (15). A guide gear (41) is coaxially provided on the extrusion shaft (4). A guide rack (13) arranged in a ring is provided inside the return box (1). The guide gear (41) and the guide rack (13) form a gear and rack engagement to drive the extrusion shaft (4) to move along the guide groove (11).

4. The glue recirculation device for a printing press according to claim 3, characterized in that, Two sets of guide gears (41) are provided, symmetrically arranged on both sides of the return pipe (3), and the number of guide racks (13) corresponds to the number of guide gears (41).

5. A glue recirculation device for a printing press according to any one of claims 2 to 4, characterized in that, A roller (43) is coaxially provided at one end of the extrusion shaft (4) adjacent to the guide groove (11). The roller (43) is engaged with the guide groove (11), and the extrusion shaft (4) rolls along the guide groove (11) through the roller (43).

6. The glue recirculation device for a printing press according to claim 1, characterized in that, The heating assembly includes an electric heating roller (45) coaxially arranged on the extrusion shaft (4), and a guide platform (14) vertically arranged in the return box (1). The surface of the guide platform (14) has an opening along the vertical direction for the return pipe (3) to be inserted. The electric heating roller (45) corresponds to the opening position of the guide platform (14), and the width of the electric heating roller (45) is smaller than the opening width of the guide platform (14).

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