A corrugating and facing paper preheating device

Abstract

The present application discloses a kind of corrugated and face paper front heating device to solve the technical problem that temperature loss is too fast before existing technology corrugated paper and face paper are pasted, affecting the bonding effect, after sizing on core paper, before corrugated paper and face paper are pressed, the sizing surface of corrugated paper is heated using 130 DEG C-145 DEG C heat source, and the heat source in heating device uses infrared heating tube or hot steam.The present application improves the temperature of corrugated paper and coated paste by heating the sizing surface of corrugated paper, improves the adhesive release effect of starch in paste, and achieves the purpose of improving speed and improving paperboard qualification rate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of corrugated paperboard production, and particularly relates to a corrugated paper and front paper heating device. BACKGROUND

[0002] The corrugated paperboard is formed by bonding face paper and corrugated paper with paste, and the corrugated paper can be provided with different layers according to the required structural strength of the corrugated paperboard. One layer of face paper and one layer of corrugated paper are bonded into single-layer corrugated paper by paste, and then several layers of single-layer corrugated paper are bonded into a whole by paste. After a layer of flat corrugated paper is heated and pressed into a required corrugated shape by a single facer, the corrugated paper is coated with paste on the corrugated wave flange, and then is bonded with the face paper (flat paper) into single-layer corrugated paper.

[0003] The paste in the paste has strict paste conditions, and the starch can release better viscosity when the paste temperature reaches 65 DEG C. If the temperature of the corrugated paper is too high, the water loss of the corrugated paper is large, which can cause corrugated paper cracking, paperboard brittle explosion line and poor bonding; if the temperature of the corrugated paper is too low, the water content of the corrugated paper is high, which can cause the bonding speed to be slow, and the speed cannot be opened fast. Therefore, the temperature control of the single facer on the corrugated paper is 70-80 DEG C, which is more suitable. The workshop environment temperature in different seasons can be different by 40 DEG C-50 DEG C, the temperature of the corrugated paper reaching the paste roller is different, especially in cold winter, the temperature of the corrugated paper decreases too fast, which affects the viscosity release of the paste, and therefore the process needs to be adjusted before the corrugated paper is bonded with the face paper, so as to ensure the normal production of the whole production line. SUMMARY

[0004] The technical problem to be solved by the present application is how to ensure that the temperature of the corrugated paper reaching the paste roller meets the required conditions of the glue bonding, and how to realize the purposes of improving the speed and improving the qualified rate of the paperboard.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] A process method for improving the production speed of corrugated paperboard, after the core paper is pasted, before the corrugated paper is bonded with the face paper, a heat source of 130 DEG C-145 DEG C is used to heat the pasted surface of the corrugated paper.

[0007] Further, the temperature of the heat source is 135 DEG C-140 DEG C.

[0008] As an embodiment, the heat source is an infrared heating pipe or a saturated steam pipe.

[0009] Further, a box body is arranged between the glue coating roller and the bonding roller, the two ends of the box body are provided with temperature sensors, the side of the box body corresponding to the bonding roller is provided with an opening, and the heat source is arranged in the box body.

[0010] To solve the above technical problems, another technical solution adopted by the present application is as follows:

[0011] A corrugated and face paper pre-heating device, comprising a box body and a saturated steam pipe with a pressure of 0.4-0.6 MPa, the box body comprises opposite first and second side plates, the first side plate is provided with an exhaust groove, the box body is internally provided with a transverse plate fixedly connected with the second side plate and a vertical plate connected between the transverse plate and the bottom plate of the box body, the transverse plate and the vertical plate enclose an independent chamber in the box body, and the saturated steam pipe is arranged in the chamber; an exhaust port is formed between the vertical plate and the bottom plate of the box body; and the pipe wall of the saturated steam pipe is provided with an exhaust hole corresponding to the second side plate.

[0012] As an embodiment, the bottom plate of the box body is provided with a water collecting groove corresponding to the vertical plate, and the box body is provided with a liquid discharge port corresponding to the water collecting groove.

[0013] As an embodiment, the vertical plate is composed of an upper plate and a lower plate, the upper plate is fixedly connected with the transverse plate, the top of the lower plate is connected with the upper plate through the rotating shaft, and a torsional spring is installed on the rotating shaft.

[0014] As an embodiment, the vertical plate is a hollow structure, and a capillary condensing pipe is installed in the vertical plate.

[0015] Compared with the prior art, the present application has the beneficial effect that the temperature of the corrugated paper and the coating paste is increased by heating the upper paste surface of the corrugated paper, the release effect of the viscosity of the starch in the paste is improved, the speed of the machine is increased, and the qualified rate of the paperboard is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0017] Figure 1 It is a schematic diagram of a single facer in the embodiment;

[0018] Figure 2 It is a structural diagram of the first heating device in the embodiment;

[0019] Figure 3 It is a structural diagram of the second heating device in the embodiment;

[0020] Figure 4 It is a sectional view of the second heating device in the embodiment;

[0021] Figure 5 It is a side sectional view of the second heating device in the embodiment;

[0022] Figure 6 This is a cross-sectional view of the vertical plate in the embodiment. Detailed Implementation

[0023] To make the technical problems solved by the present invention, the technical solutions and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments.

[0024] Example

[0025] See Figure 1 The schematic diagram of the single-sided machine shows a heat source 30 positioned between the coating roller 10 and the pressing roller 20. The heat source generates heat at 130℃-145℃, with preferred temperatures of 135℃, 136℃, 137℃, 138℃, 139℃, and 140℃. Applying the coating to the corrugated paper A after it has been glued but before it has been pressed together with the face paper B increases the temperature of the corrugated paper and the glue applied to the corrugated flange, improves the release of starch viscosity in the glue, and enhances the bonding effect between the corrugated paper and the face paper.

[0026] See Figure 2 A box 41 is provided between the coating roller and the pressing roller, arranged along the axial direction of the pressing roller. Temperature sensors 42 are provided at both ends of the box. The temperature sensors detect the current ambient temperature, and the heat source adjusts the generated temperature in real time according to the data from the temperature sensors. An opening 43 is provided on the side of the box corresponding to the pressing roller, so that the heat source is placed inside the box and the generated heat quickly reaches the coating surface.

[0027] The preferred heat source is an infrared heating tube. The infrared heating tube is installed inside the box, and the energy generated by the infrared heating tube directly radiates to the surface of the corrugated paper, enabling the corrugated paper to reach the required temperature in a short time.

[0028] Hot steam runs through the entire production line, so common steam found in production lines can be used as a heat source. If steam is used to directly heat the paste on the corrugated paper, the moisture in the steam will change the moisture content of the corrugated paper, affecting the release of starch viscosity. Therefore, dry steam should be used here.

[0029] This embodiment proposes a heating device that uses water vapor from the production line as a heat source and can quickly remove moisture from the water vapor.

[0030] See Figure 3The heating device comprises a box body 41 and a saturated steam pipe 44 with a pressure of 0.4-0.6 MPa. The box body comprises a first side plate 411 and a second side plate 412 opposite to each other. The first side plate is provided with an exhaust groove 45. A horizontal plate 46 is fixed to the second side plate. A vertical plate 47 is connected between the horizontal plate and the bottom plate of the box body. The horizontal plate and the vertical plate form an independent chamber 50 in the box body. The saturated steam pipe is arranged in the chamber. The vertical plate and the bottom plate of the box body form an exhaust port 48. The saturated steam pipe is provided with an exhaust hole 49 corresponding to the second side plate. The water vapor of the production line enters the chamber through the saturated steam pipe. The water vapor overflowing from the steam pipe first contacts the relatively cold vertical plate. The water in the water vapor is quickly condensed. The dry steam enters the box body through the exhaust port and is discharged from the exhaust groove of the box body.

[0031] As an improvement of the embodiment, a water collecting groove is arranged at the bottom plate corresponding to the vertical plate. The box body is provided with a liquid discharge port 413 corresponding to the water collecting groove. The water droplets condensed on the surface of the vertical plate fall into the water collecting groove below and are discharged from the liquid discharge port in time.

[0032] A temperature sensor is arranged in the heating device to monitor the ambient temperature in real time. However, the steam temperature of the production line cannot be adjusted for this process link. Therefore, when the heating temperature needs to be increased, the heating temperature can be increased in real time by increasing the amount of dry steam blown out per unit time. In the embodiment, the vertical plate is disassembled into an upper plate 471 and a lower plate 472. The upper plate is fixed to the horizontal plate. The top of the lower plate is connected to the upper plate through a rotating shaft 473. A torsional spring is arranged on the rotating shaft. The size of the exhaust hole of the steam pipe remains unchanged. The increased amount of steam discharged from the steam pipe increases the air flow pressure. The air flow drives the lower plate to rotate slightly around the rotating shaft to increase the size of the exhaust port. In this way, the amount of dry steam discharged from the box body per unit time can be increased, and the purpose of increasing the heating temperature is achieved.

[0033] As an improvement of the embodiment, the vertical plate adopts a hollow structure 474. A capillary condensation pipe 475 is arranged in the vertical plate. The capillary condensation pipe is connected to an external cold source. The capillary condensation pipe can control the current temperature of the vertical plate. In this way, the condensation effect of the water vapor in the water vapor can be improved. Moreover, the temperature of the water vapor can be quickly reduced in hot summer, and the temperature of the dry steam blown out can be adjusted.

[0034] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the application is not to be restricted based on the specific embodiments illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating device for corrugated paper and face paper, characterized in that, After the core paper is pasted on, and before the corrugated paper and the face paper are pressed together, the pasted surface of the corrugated paper is heated with a heat source at 130℃-145℃. The heat source includes a box body and a saturated steam pipe with a pressure of 0.4MPa-0.6MPa. The box body includes a first side plate and a second side plate opposite to each other. The first side plate is provided with an exhaust groove. A horizontal plate fixed to the second side plate is provided inside the box body, and a vertical plate is connected between the horizontal plate and the bottom plate of the box body. The horizontal plate and the vertical plate form an independent chamber inside the box body. The saturated steam pipe passes through the chamber. An exhaust port is formed between the vertical plate and the bottom plate of the box body. An exhaust hole is provided on the pipe wall of the saturated steam pipe corresponding to the second side plate. The vertical plate consists of an upper plate and a lower plate. The upper plate is fixedly connected to the horizontal plate. The top of the lower plate is connected to the upper plate via a pivot, and a torsion spring is installed on the pivot. The vertical plate has a hollow structure, and a capillary condenser is installed in the vertical plate.

2. The corrugated board and face paper preheating device according to claim 1, characterized in that, The temperature of the heat source is 135℃-140℃.

3. The corrugated board and face paper preheating device according to claim 1, characterized in that, The box body is disposed between the glue-applying roller and the pressing roller along the axial direction of the pressing roller, and temperature sensors are disposed at both ends of the box body; the side of the box body corresponding to the pressing roller is configured as an opening, and the heat source is disposed inside the box body.

4. The corrugated board and face paper preheating device according to claim 1, characterized in that, The bottom plate of the box is provided with a water collection trough corresponding to the vertical plate, and the box is provided with a drain outlet corresponding to the water collection trough.

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