Gluing method for surface paper of color box

Abstract

The invention provides a surface paper gluing method for a color box, which comprises a glue spreading roller, a glue scraping plate, a conveying compression roller and a driving device, and concave parts for retaining glue are uniformly distributed on the peripheral surface of the glue spreading roller; the glue scraping plate comprises a metal scraping plate with elastic reset force; the edge of the scraping plate abuts against the surface of the glue distributing roller until the scraping plate is slightly bent and deformed, so that glue only enters the concave part and does not stay on the surface of the glue distributing roller in the rotating process of the glue distributing roller through elastic reset force; a conveying gap not larger than the thickness of the surface paper is formed between the conveying pressing roller and the glue distributing roller, and after the surface paper is extruded and transmitted through the conveying gap, the glue distributing face of the surface paper is coated with glue corresponding to the concave part. According to the gluing method, glue only enters the concave part through the scraper with elastic reset force, preconditions are provided for follow-up pressing transmission of the surface paper, uneven surface paper can be temporarily pressed flat by the conveying pressing gap, glue coating can be completed at all positions of the surface paper, and the production efficiency and the glue coating quality are greatly improved through the gluing method.

Description

Technical Field

[0001] The invention relates to the technical field of color box production, in particular to a method for laminating surface paper of a color box. Background Art

[0002] A high-end color box on the market, usually composed of a gray box (gray board) and facial paper (such as coated paper, special paper, art paper, etc. with a certain thickness) pasted on the surface of the gray box. It is usually used in gift packaging, electronic product packaging, luxury goods packaging and other fields, and has high quality requirements. In the color box production process, it is necessary to first glue the surface of the facial paper and then complete the pasting. The existing facial paper pasting equipment is basically composed of a cloth glue roller, a glue coating roller / scraping plate and a conveying roller. The glue coating roller or the scraping plate evenly coats the glue on the surface of the cloth glue roller, and the facial paper passes between the cloth glue roller and the conveying roller and is transmitted, so that the glue is coated on one side of the facial paper. This traditional method of gluing tissue paper faces many problems: when the glue roller rotates around the axis, the glue will produce water ripples of varying thickness on the surface of the glue roller due to centrifugal force. In order to make the water ripples uniform, some will set a grid texture on the surface of the glue roller to change the water ripples or try to make the glue on the surface of the glue roller thinner. However, it is still difficult to avoid glue overflowing from the edge of the tissue paper or the window. In order to prevent the glue from sticking to the conveyor roller and affecting the printed pattern on the other side of the tissue paper or the next printing, it is usually necessary to set a gap between the conveyor roller and the glue roller that is much larger than the thickness of the tissue paper. When the tissue paper passes through the gap, the conveyor roller supports the tissue paper and rotates, and the side of the tissue paper to be glued contacts the glue and adheres to the glue roller product, thereby being transmitted forward with the glue roller and the conveyor roller; on the one hand, the tissue paper to be glued is uneven, that is, the tissue paper usually has a pattern or text formed by molding that protrudes toward the printing side. In order to display the product formation The hollow window of the paper, the indentation line formed at the bend of the adjacent surface, and the warping of the folded ear part, etc.; this makes it impossible for the adhesive-backed side of the facial paper to be completely attached to the adhesive roller, and then there are many areas of incomplete adhesive on the facial paper after gluing, especially on uneven areas, which need to be manually filled, which not only leads to low production efficiency of facial paper adhesive, but also unstable quality of facial paper adhesive. The areas with incomplete adhesive are prone to blistering, and the areas with too much adhesive will cause glue to overflow from the edge, which needs to be manually removed later; on the other hand, the facial paper is driven forward with the adhesive roller by the adhesive force with the glue, so a peeling knife needs to be set on the paper output side to peel the facial paper from the adhesive roller, and in actual production, the peeling knife occasionally becomes loose and detaches from the surface of the adhesive roller, which will cause the facial paper to rotate with the adhesive roller and be pressed tightly against the surface of the adhesive roller, causing paper roll failure, which requires a lot of time to stop the machine to clean the adhesive roller. Summary of the invention

[0003] The invention aims to provide a method for laminating color box surface paper, which has stable gluing quality, high production efficiency and is not prone to paper rolling failure.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A method for gluing the surface paper of a color box, which is used for applying glue on one side of the surface paper before pasting, and adopts a gluing device, which comprises a glue-applying roller, a glue-scraping plate, a conveying roller, and a driving device for driving the glue-applying roller and the conveying roller to rotate relative to each other around an axis respectively; the glue-applying area on the outer peripheral surface of the glue-applying roller is evenly distributed with concave parts for retaining glue; the glue-scraping plate comprises a mounting plate and a scraper fixed on the mounting plate, and the scraper is a metal plate with elastic restoring force; the following steps are adopted:

[0006] Add glue into the angle formed by the scraper and the rubber roller, and make the surface of the scraper edge contacting the glue press against the surface of the rubber roller until the scraper is slightly bent and deformed, so that the elastic restoring force of the scraper makes the glue only enter the concave part and not stay on the surface of the rubber roller during the rotation of the rubber roller;

[0007] The conveying pressure roller and the cloth glue roller form a conveying gap smaller than the thickness of the facial paper, and the cloth glue surface of the facial paper is fed into the conveying gap toward one side of the cloth glue roller. After the facial paper is squeezed and transmitted through the conveying gap, the cloth glue surface of the facial paper is coated with glue corresponding to the recessed portion.

[0008] In a preferred embodiment, both ends of the conveying roller are installed through bearing seats, and the bearing seats are connected to elastic members forcing the conveying roller to move closer to the rubber cloth roller.

[0009] In a preferred embodiment, the recessed portions are arranged in a grid shape.

[0010] In a preferred embodiment, the recessed portions are distributed in a matrix.

[0011] In a preferred embodiment, a cooling water channel structure for stabilizing the temperature of the recessed portion is provided in the rubber cloth roller.

[0012] A preferred solution further includes a mounting rod arranged parallel to the cloth rubber roller, and a plurality of paper peeling claws are installed on the mounting rod, the paper peeling claws correspond to the paper output side of the surface paper, and the tip of the peeling claws abuts against the surface of the cloth rubber roller.

[0013] The beneficial effects of the present invention are as follows: by setting evenly distributed depressions on the surface of the rubber cloth roller, and then using a scraper with elastic reset force to allow the glue to enter only into the depressions, at this time, even if the conveying gap is smaller than the thickness of the facial paper, the glue will not stick to the surface of the conveying roller, providing a prerequisite for the subsequent compression transmission of the facial paper; and when the facial paper is compressed and transmitted from the conveying roller to the surface of the rubber cloth roller, the various uneven surfaces on the facial paper will be temporarily flattened by the conveying roller, so that the glue coating can be completed everywhere on the surface of the facial paper, and no manual glue filling is required later; because the facial paper is only coated with glue at the position corresponding to the depression, and it relies on the conveying roller for transmission, and there is no glue outside the depression on the surface of the rubber cloth roller, the facial paper is not easy to stick to the surface of the rubber cloth roller to cause paper rolling failure. In summary, this gluing method greatly improves production efficiency and cloth glue quality, and is not prone to paper rolling failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the laminating device in the first embodiment;

[0016] Figure 2 It is a schematic diagram of the partial structure of the cloth rubber roller in the first embodiment;

[0017] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of the laminating device in Example 1. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] refer to Figures 1 to 3The present embodiment provides a method for gluing the surface paper of a color box, which is used to apply glue on one side of the surface paper before pasting; a gluing device is used, and the gluing device includes a glue roller 1 arranged in parallel and used to apply glue on one side of the surface paper, a scraper plate 2 used to evenly distribute the glue on the surface of the glue roller 1, a conveying roller 3 that conveys the surface paper for gluing together with the glue roller 1, and a driving device 4 that drives the glue roller 1 and the conveying roller 3 to rotate relative to each other around the axis respectively; in the present embodiment, the driving device 4 uses a motor as the power output, and the transmission part is driven by a synchronous belt to The rotation is transmitted to the rubber cloth roller 1, and the rubber cloth roller 1 and the conveying pressure roller 3 are driven by gear meshing. This structure can simultaneously drive the rubber cloth roller 1 and the conveying pressure roller 3 to rotate around their own axis; in other embodiments, the transmission part can also be replaced by a gear set or a connecting rod structure, or the rubber cloth roller 1 and the conveying pressure roller 3 can each be driven to rotate by a motor; the rubber cloth area on the outer peripheral surface of the rubber cloth roller 1 is evenly distributed with recessed parts 11 for retaining glue, and the recessed part 11 refers to a structure that is recessed and formed on the surface of the rubber cloth roller 1, and the depth, shape and spacing of the recessed part 11 are usually kept consistent. The scraper plate 2 includes a mounting plate 2a, and a scraper 2b fixed on the mounting plate 2a, and the scraper 2a is a metal plate with elastic reset force; the scraper 2b is easy to replace and easy to adjust when worn. Use the following steps:

[0020] Add glue into the angle formed by the scraper 2 and the glue roller 1, and make the surface of the edge of the scraper 2a that contacts the glue press against the surface of the glue roller 1 until the scraper 2a is slightly bent and deformed, so that the elastic restoring force of the scraper 2a allows the glue to only enter the recessed portion 11 during the rotation of the glue roller 1 and not remain on the surface of the glue roller 1;

[0021] The conveying pressure roller 3 and the cloth glue roller 1 form a conveying gap 31 that is smaller than the thickness of the facial paper, and the cloth glue surface of the facial paper is fed into the conveying gap 31 toward the side of the cloth glue roller 1. After the facial paper is squeezed and transmitted through the conveying gap 31, the cloth glue surface of the facial paper is coated with glue corresponding to the recessed portion 11.

[0022] The face paper has a certain thickness, and before mounting, it has completed surface printing processes, embossing processes for concave and convex text and pattern effects, die-cutting processes for cutting out contours, folded ears, slots, etc., and window opening processes for hollowing out some areas, etc. Therefore, before applying glue, the glue side of the face paper is uneven. By setting evenly distributed depressions 11 on the surface of the rubber cloth roller 1, and then using a scraper 2a with elastic reset force to allow glue to enter only the depressions 11, at this time, even if the conveying gap 31 is smaller than the thickness of the facial paper, the glue will not stick to the surface of the conveying roller 3, which provides a prerequisite for the subsequent pressing and transmission of the facial paper; and the facial paper is pressed and transmitted to the surface of the rubber cloth roller 1 by the conveying roller 3, and the glue on the surface of the rubber cloth roller 1 will not stick to the surface of the conveying roller 3 through the window of the facial paper or the edge of the facial paper, and the various unevenness on the facial paper will be temporarily flattened by the conveying roller 3, so that the glue coating can be completed everywhere on the surface of the facial paper, and no manual glue filling is required later; because the facial paper is only coated with glue at the position corresponding to the depression 11, and it is driven by the conveying roller 3, and there is no glue outside the depression 11 on the surface of the rubber cloth roller 1, the facial paper is not easy to stick to the surface of the rubber cloth roller 1 and cause paper rolling failure. In summary, this gluing method greatly improves production efficiency and cloth glue quality, and is not prone to paper rolling failure.

[0023] In a preferred solution, both ends of the conveying roller 3 of this embodiment are installed through bearing seats, and the bearing seats are connected with elastic members forcing the conveying roller 3 to approach the adhesive cloth roller 1. The elastic member is usually a spring or a spring sheet, and the elastic member provides pressure for the conveying roller 3 to approach the adhesive cloth roller 1, so that the two form a certain adaptive pressing force on the face paper, so that the face paper can be better contacted with the adhesive cloth roller 1 at all places to complete the adhesive cloth; at the same time, the adjustment of the gap between the conveying roller 3 and the adhesive cloth roller 1 is also simplified.

[0024] A preferred solution is that the recessed portions 11 of this embodiment are arranged in a grid shape. That is, a grid-shaped recess is formed on the surface of the adhesive roller 1, and at this time, the shape of the adhesive on the tissue paper is in a grid shape. Usually, the width of the recessed portion 11 is roughly the same as the width of the gap between adjacent recessed portions 11 to achieve the best adhesive density. In another embodiment, the recessed portions 11 are distributed in a matrix, and at this time, the shape of a single recessed portion 11 can be a square hole, a circular hole, a diamond hole, etc.

[0025] A preferred solution is that the rubber cloth roller 1 of this embodiment is provided with a cooling water circuit structure for stabilizing the temperature of the recessed portion 11. The cooling water circuit structure can adopt a conventional structure in the mechanical field, such as a water circulation pipeline provided in the rubber cloth roller 1, and a cooling device connected to the water circulation pipeline. This is an existing conventional technology and will not be described in detail. Since the recessed portion 11 has a small space and the temperature rises due to friction with the scraper 2 during long-term operation, the glue in the recessed portion 11 is easy to solidify. The provision of a cooling water circuit structure can ensure the stability of the surface of the rubber cloth roller 1 and prevent the glue from solidifying and affecting the effect of the glue cloth.

[0026] A preferred solution, the gluing device of this embodiment further comprises a mounting rod 51 arranged parallel to the glue cloth roller 1, and a plurality of paper peeling claws 5 are mounted on the mounting rod 51, and the paper peeling claws 5 correspond to the paper outlet side of the facial paper, and the tip of the peeling claws abuts against the surface of the glue cloth roller 1. Although the adhesive force between the facial paper and the glue cloth roller 1 is relatively small after the gluing in this embodiment, and the facial paper can be basically separated automatically, the provision of the paper peeling claws 5 can ensure that the facial paper after the gluing is definitely separated from the glue cloth roller 1, and prevent accidental paper rolling failure.

[0027] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for gluing the surface paper of a color box, which is used to apply glue on one side of the surface paper before pasting, and adopts a gluing device, which includes a gluing roller, a scraper, a conveying roller, and a driving device that drives the gluing roller and the conveying roller to rotate relative to each other around the axis respectively; the characteristics are: The glue spreading area on the outer peripheral surface of the glue spreading roller is evenly distributed with concave parts for retaining glue; the scraper includes a mounting plate and a scraper fixed on the mounting plate, and the scraper is a metal plate with elastic restoring force; Use the following steps: Add glue into the angle formed by the scraper and the rubber roller, and make the surface of the scraper edge contacting the glue press against the surface of the rubber roller until the scraper is slightly bent and deformed, so that the elastic restoring force of the scraper makes the glue only enter the concave part and not stay on the surface of the rubber roller during the rotation of the rubber roller; The conveying pressure roller and the cloth glue roller form a conveying gap smaller than the thickness of the facial paper, and the cloth glue surface of the facial paper is fed into the conveying gap toward one side of the cloth glue roller. After the facial paper is squeezed and transmitted through the conveying gap, the cloth glue surface of the facial paper is coated with glue corresponding to the recessed portion.

2. The method for laminating the surface paper of a color box according to claim 1, characterized in that: Both ends of the conveying and pressing roller are installed through bearing seats, and the bearing seats are connected with elastic members forcing the conveying and pressing roller to move closer to the cloth rubber roller.

3. The method for laminating the surface paper of a color box according to claim 1, characterized in that: The recessed parts are arranged in a grid shape.

4. The method for laminating the surface paper of a color box according to claim 1, characterized in that: The recessed parts are distributed in a matrix.

5. The method for laminating the surface paper of a color box according to claim 1, characterized in that: A cooling water channel structure for stabilizing the temperature of the recessed portion is arranged inside the rubber cloth roller.

6. The method for laminating the surface paper of a color box according to claim 1, characterized in that: It also includes a mounting rod arranged parallel to the rubber cloth roller, on which a plurality of paper peeling claws are mounted, the paper peeling claws correspond to the paper output side of the surface paper, and the tip of the peeling claws abuts against the surface of the rubber cloth roller.

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