Gluing device for increasing running speed of white cardboard machine

Abstract

The utility model belongs to the technical field of papermaking, and particularly relates to a sizing device for increasing the running speed of a white cardboard machine, which comprises a pair of sizing roller and a lower carrier roller which are contacted with each other, and the sizing roller and the lower carrier roller are driven by a motor to rotate oppositely; the glue applicator further comprises a glue applying metering rod and a feeding pipe, and the glue applying metering rod makes contact with the glue applying roller and is driven by the motor to rotate opposite to the glue applying roller. And a plurality of nozzles capable of spraying glue liquid to the gluing roller are distributed on the feeding pipe belt. According to the sizing device capable of increasing the running speed of the white cardboard machine, a sizing mode is changed into a film transfer mode from a soaking mode, and the film transfer mode can uniformly transfer a certain amount of starch glue liquid to a paper surface through different types of metering rods, so that the sizing amount is reduced on the premise of ensuring the paper sheet strength and the interlayer bonding strength, and the production efficiency is improved. And the bottleneck problems of high post-drying moisture and incapability of improving the vehicle speed are solved, so that the productivity is improved.

Description

Technical Field

[0001] The utility model relates to a glue applying device for improving the running speed of a white cardboard machine, belonging to the technical field of papermaking. Background Art

[0002] With the implementation of the plastic ban, consumers and business premises are increasingly seeking more environmentally friendly, degradable and recyclable plastic alternatives, and white cardboard is the best alternative. It can not only be used to make handbags, but also to make noodle bowls, paper cups, dinner plates, milk cartons, beverage boxes, etc., and has penetrated into people's lives.

[0003] The demand for white cardboard is increasing day by day, and major white cardboard manufacturers are constantly looking for ways to increase vehicle speed, improve production capacity and reduce costs. However, during the speed-up process, paper machines often encounter problems such as high humidity in the drying area, which limits the speed increase. The sizing method has a great influence on the humidity of post-drying. The amount of sizing liquid migrating into the paper in the immersion sizing method is large, and the sizing amount is difficult to control, which can easily cause high humidity in the post-drying and limit the speed increase. Therefore, it is necessary to optimize and improve the dehydration of the wet section and the surface sizing method to reduce the humidity of the post-drying and increase the speed. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a glue application device for increasing the running speed of a white cardboard machine, thereby increasing the speed and thus the production capacity.

[0005] The glue application device for improving the running speed of the white cardboard machine described in the utility model comprises a pair of contacting glue application rollers and a lower supporting roller, which rotate towards each other under the drive of a motor; it also comprises a glue application metering rod and a feeding pipe, the glue application metering rod is in contact with the glue application roller and also rotates towards each other under the drive of the motor; the feeding pipe is provided with a plurality of nozzles which can spray glue liquid onto the glue application roller.

[0006] The film transfer sizing method sprays the glue on the sizing roller through a feed pipe. The surface of the glue metering rod is provided with evenly distributed grooves, which can evenly coat the glue on the sizing roller. When the glue roller contacts the paper sheet during operation, the glue is transferred to the paper sheet. This sizing method has good starch film-forming properties, and the required glue amount can be controlled by different metering rod models. The strength of the paper can be ensured under low glue application amount, while also reducing the post-drying humidity, solving the bottleneck of vehicle speed limitation caused by high humidity in the drying area.

[0007] Preferably, the feed pipe is located below the glue metering rod and is parallel to the axis of the glue roller.

[0008] The utility model also includes a pre-drying tube, which is located behind the glue roller and the lower support roller, and is provided with a plurality of air outlets that can blow toward the paper sheets. After glue application, hot air with a lower temperature can be used for pre-drying in advance to reduce the humidity of post-drying.

[0009] Preferably, the pre-drying tube is parallel to the width direction of the paper sheet.

[0010] Preferably, the pre-drying tube is located on the glue-coated back side of the paper sheet so that the hot air does not blow directly on the glue-coated surface.

[0011] Preferably, the surface of the glue roller is coated with a rubber layer.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The gluing device for improving the running speed of the white cardboard machine described in the utility model changes the gluing method from an immersion method to a film transfer method. The film transfer method can transfer a certain amount of starch glue to the paper surface evenly through metering rods of different models. Under the premise of ensuring the strength of the paper sheet and the interlayer bonding strength, the amount of glue applied is reduced, solving the bottleneck problem of high moisture content in post-drying and inability to increase the machine speed, thereby improving production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] In the figure: 1. reversing roller; 2. paper sheet; 3. lower support roller; 4. glue roller; 5. glue metering rod; 6. feeding pipe; 7. pre-drying pipe. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with specific embodiments.

[0017] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0018] For example, multiple embodiments may have multiple changes and multiple forms, and it should be understood that the scope of rights of the present utility model includes equivalents that can realize the technical idea.

[0019] like Figure 1 As shown, this embodiment is realized by the following technical scheme: it includes a reversing roller 1, a pair of contacting glue rollers 4 and a lower roller 3, the surface of the glue roller 4 is coated with a rubber layer, and the glue roller 4 and the lower roller 3 rotate in opposite directions under the drive of a motor; it also includes a glue metering rod 5 and a feeding pipe 6, the glue metering rod 5 is in contact with the glue roller 4, and also rotates in opposite directions with the glue roller 4 under the drive of the motor; the feeding pipe 6 is provided with a plurality of nozzles for spraying glue liquid to the glue roller 4, wherein the feeding pipe 6 is located below the glue metering rod 5 and is parallel to the axis of the glue roller 4.

[0020] This embodiment further includes a pre-drying tube 7, which is located behind the glue roller 4 and the lower support roller 3, and has a plurality of air outlets that can blow toward the paper sheet 2. The pre-drying tube 7 is parallel to the width direction of the paper sheet 2, and is located on the glue-coated back side of the paper sheet 2.

[0021] The utility model changes the gluing method from immersion to film transfer. The film transfer method can transfer a certain amount of starch glue evenly to the paper surface through different types of metering rods. Under the premise of ensuring the strength of the paper sheet and the interlayer bonding strength, the glue amount is reduced from 2.5±0.5g / ㎡ to 1.5±0.5g / ㎡. After gluing, hot air with a lower temperature can be used for pre-drying in advance to reduce the humidity of post-drying, thereby solving the bottleneck problem of high humidity in post-drying and inability to increase the vehicle speed, thereby improving production capacity.

[0022] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.

Claims

1. A glue application device for increasing the running speed of a white cardboard machine, characterized in that: The invention comprises a pair of contacting glue rollers (4) and lower supporting rollers (3), wherein the glue rollers (4) and lower supporting rollers (3) rotate in opposite directions under the drive of a motor; and also comprises a glue metering rod (5) and a feeding pipe (6), wherein the glue metering rod (5) contacts the glue rollers (4) and also rotates in opposite directions with the glue rollers (4) under the drive of the motor; and the feeding pipe (6) is provided with a plurality of nozzles for spraying glue liquid onto the glue rollers (4).

2. The glue application device for increasing the running speed of the white cardboard machine according to claim 1 is characterized in that: The feed pipe (6) is located below the glue metering rod (5) and is parallel to the axis of the glue roller (4).

3. The glue-applying device for increasing the running speed of a white cardboard machine according to claim 1 is characterized in that: It also comprises a pre-drying tube (7), which is located behind the glue roller (4) and the lower support roller (3), and is provided with a plurality of air outlets capable of blowing toward the paper sheet (2).

4. The glue-applying device for increasing the running speed of a white cardboard machine according to claim 3 is characterized in that: The pre-drying tube (7) is parallel to the width direction of the paper sheet (2).

5. The glue application device for increasing the running speed of a white cardboard machine according to claim 3 or 4, characterized in that: The pre-drying tube (7) is located on the glue-coated back side of the paper sheet (2).

6. The glue application device for increasing the running speed of a white cardboard machine according to claim 1, characterized in that: The surface of the glue-applying roller (4) is coated with a rubber layer.

Images