Energy-saving oven for gravure printing machine for decorative paper

Abstract

The present application relates to an energy-saving oven for an intaglio printing machine for decorative paper, which comprises a housing, a conveying mechanism for conveying a decorative paper tape, a plurality of hot air drying components and a plurality of cold air drying components. The conveying mechanism is arranged inside the housing; the hot air drying components and the cold air drying components are alternately distributed along the conveying direction of the conveying mechanism; the hot air drying component comprises a hot air pipe fixedly connected to the inside of the housing and a first exhaust pipe. Both the hot air pipe and the first exhaust pipe are arranged to open towards the conveying mechanism. The hot air pipe corresponding to the discharging end of the conveying mechanism is used for inputting hot air, and the first exhaust pipe is used for sucking back the blown hot air. Moreover, the first exhaust pipe is connected to the hot air pipe of the adjacent hot air drying component along the conveying path of the conveying mechanism through a connecting piece; the cold air drying component is used for conveying cold air towards the conveying mechanism and sucking back the cold air. The present application can effectively reduce the possibility of false drying during the intaglio printing of decorative paper.

Description

Technical Field

[0001] The present application relates to the field of printing and drying technology, and in particular to an energy-saving oven for a gravure printing machine for decorative paper. Background Art

[0002] Gravure printing is a direct printing method that first covers the entire surface of the printing plate with ink, then scrapes off the ink on the blank part of the printing plate surface through a scraping mechanism, leaving the ink only in the cells of the image and text part, and transfers the ink to the surface of the substrate under pressure to obtain a printed product. It is mainly used in the production of large quantities of printed products. Decorative paper, as a consumable decorative product, currently has a relatively large market demand and a relatively uniform format, so gravure printing is often used in the production of decorative paper.

[0003] Since the demand for decorative paper is relatively large, in order to optimize the production efficiency of decorative paper, in the prior art, an oven is often used to assist in drying the printed decorative paper. The prior art oven includes a box body, a transmission mechanism arranged in the box body, and a drying structure for drying. The transmission mechanism is used to transport the printed substrate; the drying mechanism is used to dry the ink on the substrate. The drying mechanism often transports hot air to the substrate to dry the ink on the substrate by heating.

[0004] In the actual production process, due to the need for mass production, the transmission speed of the transmission mechanism is relatively fast, and for some parts that need deep printing, the thickness of the ink will be relatively thick. At the same time, due to the use of hot air drying, the hot air first contacts the surface of the ink during the flow process, which will cause the surface of the ink to be dried and solidified first, and then form a heat exchange barrier between the inside and outside of the undried ink, resulting in the phenomenon of false drying of some ink after printing. Therefore, how to reduce the probability of false drying of ink while maintaining a relatively fast paper feeding speed is an urgent problem to be solved. Summary of the invention

[0005] In order to reduce the probability of false drying of ink while maintaining the paper feeding speed, the present application provides an energy-saving oven for a gravure printing machine for decorative paper.

[0006] The present application provides an energy-saving oven for a gravure printing machine for decorative paper, which adopts the following technical solution:

[0007] An energy-saving oven for gravure printing of decorative paper, comprising a housing, a conveying mechanism for conveying a decorative paper tape, a plurality of hot air drying components and a plurality of cold air drying components, wherein the conveying mechanism is arranged inside the housing; the hot air drying components and the cold air drying components are alternately distributed along the conveying direction of the conveying mechanism; the hot air drying component includes a hot air pipe fixedly connected to the inside of the housing and a first exhaust pipe, both the hot air pipe and the first exhaust pipe are arranged to open towards the conveying mechanism, the hot air pipe corresponding to the discharging end of the conveying mechanism is used for inputting hot air, the first exhaust pipe is used for sucking back the blown hot air, and the first exhaust pipe is connected to the hot air pipe of the adjacent hot air drying component along the conveying path of the conveying mechanism through a connecting piece; the cold air drying component is used for conveying cold air towards the conveying mechanism and sucking back the cold air.

[0008] By adopting the above technical solution, after gravure printing the decorative paper tape, the decorative paper tape is conveyed inside the housing through the conveying mechanism, and in this process, the printing surface of the decorative paper faces the hot air drying components and the cold air drying components; at the same time, the hot air pipe blows hot air towards the decorative paper and sucks it back through the first exhaust pipe, and the hot air flows from the hot air pipe on the discharging end side of the conveying mechanism through the first exhaust pipe and the connecting piece to the feeding end of the conveying mechanism in turn, which will cause the decorative paper to be dried by hot air with gradually increasing temperature, thereby reducing the situation that a curing layer appears on the surface layer of the ink on the decorative paper tape, insulating heat and affecting the volatilization of the solvent; at the same time, the cold air drying components alternately cool the hot air-dried decorative paper, so that the ink on the surface of the decorative paper tape continuously undergoes hot and cold alternation, to further promote the curing of the ink, and in this process, reduce the situation that the surface layer of the ink is cured due to continuous heating while the inside is not cured, so as to achieve the purpose of reducing the false drying phenomenon of the ink.

[0009] Optionally, a heat insulation layer is provided on the inner wall of the housing.

[0010] By adopting the above technical solution, the heat insulation layer can optimize the heat insulation performance of the housing and reduce the heat exchange between the inside and outside of the housing.

[0011] Optionally, the cold air drying component includes a cold air pipe fixedly connected to the inside of the housing and a second exhaust pipe, both the cold air pipe and the second exhaust pipe are arranged to open towards the conveying mechanism, the cold air pipe is used for conveying cold air towards the conveying mechanism, and the second exhaust pipe is used for sucking back the blown cold air.

[0012] By adopting the above technical solution, when the decorative paper tape is conveyed inside the housing through the conveying mechanism, after the hot air blown out by the hot air pipe dries the decorative paper, it will be cooled in time by the cold air blown out by the cold air pipe, and the cold air is sucked back through the second exhaust pipe to reduce the interference with the hot air at the hot air pipe.

[0013] Optionally, the exhaust air volume of the second exhaust pipe is greater than the air output volume of the cold air pipe, and the housing is provided with an air extraction member for extracting the excess gas.

[0014] By adopting the above technical solution, the cold air blown out by the cold air duct can be timely drawn back by the second row of air ducts, thereby further reducing the possibility of the cold air blown out by the cold air duct being mixed with the hot air blown out by the hot air duct, so as to reduce the situation that the gas temperature at the hot air duct drops too fast due to excessive mixing of cold air.

[0015] Optionally, the housing corresponds to the windshields of the cold air drying assembly and the hot air drying assembly one by one, and the windshields cover the cold air duct and the second row of air ducts of the same cold air drying assembly or the hot air duct and the first row of air ducts of the same hot air drying assembly.

[0016] By adopting the above technical solution, the windshield can form local gas flow regions in the cold air drying assembly and the hot air drying assembly respectively, thereby further reducing the possibility of gas flowing between the hot air drying assembly and the cold air drying assembly.

[0017] Optionally, control components for controlling the air outlet width are arranged in both the cold air duct and the hot air duct. The air inlets of the cold air duct and the hot air duct are both arranged in the middle. The control component includes two control pipes and a control screw rod that penetrates and is threadedly connected to the two control pipes. The opposite ends of the two control pipes are closed, and the control pipes are adapted to and slidably connected to the inside of the cold air duct or the hot air duct. The control screw rod is a double-headed screw rod with opposite thread directions at both ends, and the control screw rod is rotatably connected to the hot air duct or the cold air duct.

[0018] By adopting the above technical solution, since the widths of different specifications of decorative tapes are different, if the widths of the air outlets of the hot air duct and the cold air duct are greater than the width of the decorative tape, part of the gas blown out by the hot air duct and the cold air duct cannot be blocked by the decorative paper and will flow in the housing, which will cause the gas between the hot air drying assembly and the cold air drying assembly to interfere with each other and affect the effect of alternating hot and cold drying; if the width is too small compared to the decorative paper, part of the ink cannot be dried; and at this time, only by rotating the control screw rod to move the two control pipes towards or away from each other to block the air outlets at both ends of the hot air duct and the cold air duct, so that the air can only flow out between the two control pipes, thereby adapting to decorative paper tapes of different specifications and sizes.

[0019] Optionally, the housing is provided with a driving member for simultaneously driving a plurality of control screw rods to rotate. The driving member includes a plurality of driving sprockets and a driving chain sleeved on the plurality of driving sprockets. The plurality of driving sprockets are coaxially and fixedly connected to the control screw rods one by one, and the edges of the driving sprockets cooperating with the driving chain are arranged away from the edges of the adjacent driving sprockets cooperating with the driving chain. The housing is provided with a driving motor, and the output shaft of the driving motor is coaxially and fixedly connected to any one of the driving sprockets.

[0020] By adopting the above technical solution, when it is necessary to control the air outlet width of the hot air duct and the cold air duct, only need to drive the motor to drive one of the driving sprockets to rotate, and drive other driving sprockets to rotate through the driving chain, so as to drive a plurality of control screws to rotate, so as to realize the synchronous control of the width adjustment of a plurality of hot air ducts and cold air ducts.

[0021] Optionally, a limiting rod is inserted through two control pipes of the same control assembly, and the limiting rod is parallel and fixedly connected to the hot air duct or the cold air duct where it is located.

[0022] By adopting the above technical solution, the limiting rod can limit the circumferential rotation of the control pipe, so that the control pipe is slidably connected to the inside of the hot air duct or the cold air duct.

[0023] Optionally, the hot air duct and the cold air duct are both provided with an adjusting pipe for controlling the air outlet speed. The adjusting pipe is sleeved outside the hot air duct or the cold air duct. A plurality of groups of air outlet holes are formed in the pipe wall of the adjusting pipe. The plurality of groups of air outlet holes are distributed around the central axis of the adjusting pipe, and the apertures of the plurality of groups of air outlet holes increase in sequence. The rotation path of the air outlet hole intersects with the air outlet of the hot air duct or the cold air duct where it is located.

[0024] By adopting the above technical solution, since different inks have different adaptabilities to the air flow speed during air drying, at this time, by rotating the adjusting pipe, the air outlet holes with different apertures can be communicated with the air outlet of the hot air duct or the cold air duct where it is located, so as to realize the adjustment of the air speed during drying, so as to reduce the situation that the ink flows due to too large a flow rate or the ink cannot be fully dried due to too small a wind speed.

[0025] Optionally, an elastic flap is fixedly connected to the adjusting pipe, and a plurality of limiting holes are formed in the outer wall of the hot air duct or the cold air duct on the path of the elastic flap. The elastic flap is buckled in the limiting hole, and the distance between adjacent limiting holes is adapted to the distance between adjacent two groups of air outlet holes.

[0026] By adopting the above technical solution, during the rotation of the adjusting pipe, the elastic flap can be inserted into the limiting hole to realize the positioning of the adjusting pipe relative to the hot air duct or the cold air duct where it is located, so as to reduce the possibility that the corresponding air outlet holes cannot be fully communicated with the air outlet of the hot air duct or the cold air duct where it is located due to excessive or insufficient rotation, resulting in a situation where the flow rate does not match the preset value.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] After intaglio printing the decorative paper tape, the decorative paper tape is transported in the housing through a conveying mechanism. During this process, the printing surface of the decorative paper faces the hot air drying assembly and the cold air drying assembly. At the same time, hot air is blown out from the hot air pipes towards the decorative paper and drawn back through the first row of air pipes. Moreover, the hot air flows from the hot air pipes on one side of the discharge end of the conveying mechanism through the first row of air pipes and the connecting piece to the feeding end of the conveying mechanism in sequence, which enables the decorative paper to be dried by hot air with gradually increasing temperature, thereby reducing the situation that a curing layer appears on the surface of the ink on the decorative paper tape, insulating heat, and affecting the solvent volatilization. At the same time, after the decorative paper is heated and dried, cold air is blown out from the cold air pipes to cool the decorative paper, and then the second row of air pipes draws back the cold air, making the ink on the surface of the decorative paper tape continuously undergo hot and cold alternation, so as to further promote the curing of the ink. During this process, the situation that the surface layer of the ink is cured due to continuous heating while the inside is not cured is reduced, thereby achieving the purpose of reducing the phenomenon of false drying of the ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of an embodiment of the present application.

[0030] Figure 2 is Figure 1 a schematic cross-sectional structural diagram of the A-A line in

[0031] Figure 3 is a schematic cross-sectional structural diagram of the hot air pipe, the control assembly, and the regulating pipe in an embodiment of the present application.

[0032] Figure 4 is a schematic layout structural diagram of an embodiment of the present application, used to show the structures of the hot air drying assembly and the cold air drying assembly.

[0033] Figure 5 is Figure 3 an enlarged structural diagram of part B in

[0034] Figure 6 is a schematic cross-sectional structural diagram of the hot air pipe in an embodiment of the present application.

[0035] Figure 7 is Figure 1 an enlarged structural diagram of part C in

[0036] Figure 8 is Figure 4 an enlarged structural diagram of part D in

[0037] Description of reference numerals: 1. Housing; 11. Thermal insulation layer; 12. Air extraction member; 13. Windshield; 14. Driving member; 141. Driving sprocket; 142. Driving chain; 143. Driving motor; 15. Input port; 16. Output port; 2. Conveying mechanism; 3. Hot air drying assembly; 31. Hot air pipe; 32. First exhaust air pipe; 33. Connecting member; 331. Connecting pipe; 332. Connecting exhaust fan; 34. Hot air member; 341. Electric heating fan; 342. Hot air conveying pipe; 4. Cold air drying assembly; 41. Cold air pipe; 42. Second exhaust air pipe; 43. Cold air supply member; 431. Cold air fan; 432. Cold air conveying pipe; 44. Cold air extraction member; 441. Cold air extractor; 442. Cold air extraction pipe; 5. Control assembly; 51. Control pipe; 511. Limiting rod; 52. Control screw; 53. Ventilation pipe; 6. Adjusting pipe; 61. Air outlet hole; 62. Elastic flap; 621. Positioning hole; 63. Adjusting driving member; 631. Adjusting worm gear; 632. Adjusting worm. Detailed implementation manners

[0038] The following further describes this application in detail Figures 1 - 8 with reference to the attached drawings.

[0039] The embodiment of this application discloses an energy-saving oven for an intaglio printing machine for decorative paper. Referring to Figure 1 and Figure 2 , the energy-saving oven for an intaglio printing machine for decorative paper includes a housing 1, a conveying mechanism 2, a plurality of hot air drying assemblies 3, and a plurality of cold air drying assemblies 4. A decorative paper input port 15 is provided at the top of the housing 1, and a decorative paper output port 16 is provided at the bottom of the housing 1. A thermal insulation layer 11 is formed on the inner wall of the housing 1. The thermal insulation layer 11 is formed by attaching a thermal insulation material to the inner wall of the housing 1, specifically glass wool, and a ceramic fiber felt is radiated on the surface of the thermal insulation layer 11 for heat preservation to reduce the heat exchange between the inside and outside of the housing 1.

[0040] Referring to Figure 1 and Figure 2 , the conveying mechanism 2 is arranged inside the housing 1 and is used to convey the decorative paper from the input port 15 to the output port 16, and the conveying path of the conveying mechanism 2 is arc-shaped, and the opening of the arc-shaped conveying path of the conveying mechanism 2 is inclined downward. Specifically, the conveying mechanism 2 is a conveyor belt or a roller conveyor. In the embodiment of this application, the conveying mechanism 2 is a roller conveyor and a plurality of conveying rollers of the conveying mechanism 2 are arranged in an arc shape so that the conveying path of the conveying mechanism 2 is arc-shaped.

[0041] The hot air drying component 3 and the cold air drying component 4 are arranged on the side of the conveying path of the conveying mechanism 2 away from the outlet. The hot air drying component 3 and the cold air drying component 4 are alternately arranged along the conveying path of the conveying mechanism 2, and the cold air drying component 4 is located on the side of the outlet 16 of the housing 1. Therefore, after the printing of the decorative paper tape is completed, the decorative paper tape is dried alternately by hot air and cold air, and in this process, after the hot air heats and dries the decorative paper, it is promptly cooled by cold air to slow down the curing speed of the ink surface, thereby reducing the pseudo-drying phenomenon caused by the direct curing of the surface ink of the decorative paper, which causes the solvent inside the ink to be unable to volatilize; at the same time, when drying by cold air, it can still assist in accelerating the volatilization of the solvent, and then alternately heat and cool by cold air to achieve the successive curing of the ink from the surface to the inner layer, so as to reduce the occurrence of the pseudo-drying phenomenon of the ink.

[0042] Specifically, the hot air drying component 3 is used to blow hot air toward the decorative paper and extract the hot air; the cold air drying component 4 is used to blow cold air toward the decorative paper and extract the cold air, so as to achieve timely cooling of the decorative paper and accelerate the volatilization of the solvent.

[0043] Reference Figure 1 and Figure 2 The hot air drying assembly 3 includes a hot air pipe 31 and a first exhaust pipe 32. The hot air pipe 31 is located on the side of the first exhaust pipe 32 of the same hot air drying assembly 3 facing the output port 16. The hot air pipe 31 and the first exhaust pipe 32 are both opened toward the conveying mechanism 2. The hot air pipe 31 of the hot air drying assembly 3 facing the output port 16 among the several hot air drying assemblies 3 is connected with a hot air member 34 for inputting hot air. The hot air member 34 includes an electric heating fan 341 fixedly connected to the housing 1 and a hot air delivery pipe 342 connected to the air outlet of the electric heating fan 341. The hot air delivery pipe 342 is connected to the hot air pipe 31 corresponding to the output port 16. The first exhaust duct 32 is connected to the hot air duct 31 of the adjacent hot air drying assembly 3 along the conveying path of the conveying mechanism 2 through the connector 33, so that the hot air flows successively through the hot air duct 31 toward the input port 15 along the conveying path of the conveying mechanism 2, so that the hot air temperature output by the hot air duct 31 at the input port 15 is relatively low, further reducing the possibility of false drying caused by direct curing of the ink surface. The first exhaust duct 32 located on one side of the input port 15 is connected to the outside of the housing 1 through the connector 33, and the exhausted gas is input into the waste gas treatment device through the pipeline.

[0044] Reference Figure 1 and Figure 2, the connecting member 33 includes a connecting pipe 331 and a connecting exhaust fan 332 fixedly connected to the connecting pipe 331. The connecting exhaust fan 332 is used to extract the air inside the connecting pipe 331. The air inlet of the connecting pipe 331 is fixedly connected and communicated with the first exhaust air pipe 32. The air outlet of the connecting pipe 331 at the input port 15 is fixedly connected to the housing 1 and is used to connect to an external waste gas treatment device. The air outlets of the other connecting pipes 331 are fixedly connected and communicated with the hot air pipe 31 adjacent to the side facing the input port 15. During use, the hot air blown to the decorative paper tape by the hot air pipe 31 is timely drawn back by the connecting exhaust fan 332 and conveyed to the adjacent hot air drying assembly 3 for the next hot air drying.

[0045] Referring to Figure 1 and Figure 2 , the cold air drying assembly 4 includes a cold air pipe 41 fixedly connected to the inner wall of the housing 1 and a second exhaust air pipe 42. The cold air pipe 41 and the second exhaust air pipe 42 are also both arranged to open towards the conveying mechanism 2. The cold air pipe 41, the second exhaust air pipe 42, the hot air pipe 31 and the first exhaust air pipe 32 are parallel to each other. The housing 1 is provided with a cold air supply member 43 for supplying cold air and a cold air extraction member 44 for extracting cold air.

[0046] Specifically, the cold air supply member 43 includes a cold air fan 431 fixedly connected to the housing 1 and a cold air conveying pipe 432. The cold air conveying pipe 432 is fixedly connected to the housing 1, and the cold air conveying pipe 432 is simultaneously connected to the inside of a plurality of cold air pipes 41 through pipes. The input port of the cold air conveying pipe 432 is fixedly connected and communicated with the output end of the cold air fan 431 to realize the blowing of cold air. The cold air extraction member 44 includes a cold air extractor 441 fixedly connected to the outer wall of the housing 1 and a cold air extraction pipe 442 fixedly connected and communicated with the output end of the cold air extractor 441. The cold air extraction pipe 442 is fixedly connected and communicated with a plurality of second exhaust air pipes 42 through pipes to realize the synchronous recovery of cold air, and the recovered cold air is conveyed by the cold air extractor 441 to an external waste gas treatment device for waste gas treatment.

[0047] Referring to Figure 1 and Figure 2 , at the same time, the exhaust air volume of the second exhaust air pipe 42 is greater than the air outlet volume of the cold air pipe 41 to reduce the possibility that the temperature of the hot air extracted by the first exhaust air pipe 32 decreases too quickly due to the mixing of cold air during use. And in order to further reduce the possibility of cold air mixing at the hot air drying assembly 3, the housing 1 is fixedly connected with a plurality of windshields 13. The plurality of windshields 13 are arranged corresponding to the hot air drying assembly 3 and the cold air drying assembly 4 one by one. The windshield 13 covers the cold air pipe 41 and the second exhaust air pipe 42 of the same cold air drying assembly 4 or the hot air pipe 31 and the first exhaust air pipe 32 of the same hot air drying assembly 3, and the windshield 13 is arranged to open towards the conveying mechanism 2 to assist in isolating the air flow.

[0048] In addition, in order to reduce the waste gas escaping from the inside of the housing 1 to the production site, air extraction components 12 for extracting excess gas are provided at both the output port 16 and the input port 15. The air extraction component 12 is an air extraction fan or an air pump. The air extraction component 12 is fixedly connected to the inner wall of the housing 1. The air extraction component 12 is an air extraction fan and its input end is arranged towards the position where the output port 16 is located or the position where the input port 15 is located, so as to extract the excess gas.

[0049] Refer to Figure 2 and Figure 3 At the same time, during production, decorative papers of different widths are often encountered. At this time, if the widths of the hot air pipe 31 and the cold air pipe 41 are greater than the decorative paper, the hot air and the cold air will mix relatively quickly inside the housing 1, resulting in insufficient air temperature blown out by the hot air pipe 31 near the input port 15. Therefore, a control component 5 for controlling the air outlet width is provided inside the hot air pipe 31 and the cold air pipe 41.

[0050] The control component 5 includes two control pipes 51 and a control screw 52 coaxially passing through the two control pipes 51. The two control pipes 51 are arranged with the same central axis and their opposite ends are closed. The control pipe 51 is slidably connected to the inner wall of the hot air pipe 31 or the cold air pipe 41. The control screw 52 is a double-headed screw and the thread directions of the control screw 52 threadedly connected to the two control pipes 51 are opposite, so as to control the two control pipes 51 to move towards or away from each other. Among them, the control screw 52 is rotatably connected to the housing 1.

[0051] Refer to Figure 1 , Figure 2 and Figure 3 , Ventilation pipes 53 are fixedly connected to the inner walls of both the hot air pipe 31 and the cold air pipe 41. The ventilation pipe 53 passes through one of the control pipes 51. One end of the ventilation pipe 53 in the cold air pipe 41 is located in the middle, and the other end of the ventilation pipe 53 in the cold air pipe 41 communicates with the cold air delivery pipe 432. One end of the ventilation pipe 53 in the hot air pipe 31 is located in the middle. The other end of the ventilation pipe 53 in the hot air pipe 31 at the input port 15 communicates with the hot air delivery pipe 342, and the other ends of the ventilation pipes 53 in the other hot air pipes 31 communicate with the connecting pipe 331, so that the air inlets of both the hot air pipe 31 and the cold air pipe 41 are arranged in the middle. At the same time, during use, by rotating the control screw 52, the two control pipes 51 can be driven to slide towards or away from each other simultaneously, so as to achieve the purpose of blocking both axial ends of the air outlet of the corresponding hot air pipe 31 or cold air pipe 41, so that the air output by the ventilation pipe 53 blows out from the part between the two control pipes 51 at the air outlet of the hot air pipe 31 or the cold air pipe 41 and dries the decorative paper tape, thereby achieving the purpose of adapting to decorative paper tapes of different widths.

[0052] Refer to Figure 2 and Figure 3, In addition, in order to prevent the control pipe 51 from rotating synchronously with the control screw 52, limiting rods 511 are fixedly connected inside both the hot air pipe 31 and the cold air pipe 41. The limiting rods 511 are parallel to the corresponding hot air pipe 31 or cold air pipe 41, and the limiting rods 511 pass through two control pipes 51 inside the corresponding hot air pipe 31 or cold air pipe 41.

[0053] Refer to Figure 4 and Figure 5 , on the outer wall of the housing 1, a driving member 14 is provided for simultaneously driving a plurality of control screws 52 to rotate. The driving member 14 includes a plurality of driving sprockets 141 and a driving chain 142. The driving sprockets 141 are coaxially and fixedly connected to one end of the control screw 52 passing through the housing 1 in a one-to-one correspondence. The driving chain 142 is sleeved on two driving sprockets 141 located at both ends along the conveying path of the conveying mechanism 2, and the driving chain 142 is engaged with the opposite side edges of adjacent two driving sprockets 141, so as to be able to drive a plurality of driving sprockets 141 to rotate simultaneously through the driving chain 142. Among them, the thread helix directions of adjacent two control screws 52 are set to be opposite, so that when the driving chain 142 drives the control screw 52 to rotate, the sliding directions of the control pipes 51 of a plurality of control assemblies 5 are the same. The housing 1 is fixedly connected with a driving motor 143, and the output shaft of the driving motor 143 is coaxially and fixedly connected to any one of the plurality of driving sprockets 141 for driving the driving sprocket 141 to rotate.

[0054] Refer to Figure 5 and Figure 6 , in addition, since different decorative paper tapes use different inks during use, resulting in different ink fluidities. At this time, if the flow rate of the gas blown out by the hot air pipe 31 and the cold air pipe 41 is too large, it will cause a relatively large impact on the undried ink, leading to the possibility of ink flow. Therefore, in order to adapt to different types of inks, the cold air pipe 41 and the hot air pipe 31 are provided with adjusting pipes 6 for adjusting the flow rate of the blown-out gas.

[0055] The adjusting pipes 6 are sleeved on the hot air pipe 31 and the cold air pipe 41 in a one-to-one correspondence, and a plurality of groups of air outlet holes 61 are formed in the pipe wall of the adjusting pipe 6. The plurality of groups of air outlet holes 61 are arranged around the central axis of the adjusting pipe 6. There are at least two groups of air outlet holes 61. In the embodiment of the present application, there are four groups of air outlet holes 61. And the aperture diameters of X groups of air outlet holes 61 increase in sequence. The path along which the air outlet holes 61 follow the adjusting pipe 6 to rotate passes through the air outlet of the corresponding hot air pipe 31 or cold air pipe 41, so that different groups of air outlet holes 61 correspond to the air outlet holes of the hot air pipe 31 or the cold air pipe 41, so that the gas flows out through the air outlet holes 61 with different aperture diameters, so as to realize the change of the flow rate to adapt to different types of inks.

[0056] Refer to Figure 5 and Figure 6, Meanwhile, in order to position the regulating pipe 6 and the corresponding hot air pipe 31 or cold air pipe 41 relatively accurately, one end of the regulating pipe 6 is provided with an adjusting opening, and an elastic flap 62 is arranged in the adjusting opening. One end of the elastic flap 62 along the circumferential direction of the regulating pipe 6 is fixedly connected to the edge of the adjusting opening, and the other end of the elastic flap 62 along the circumferential direction of the regulating pipe 6 is bent towards the hot air pipe 31 or the cold air pipe 41. A plurality of limiting holes 621 are formed in the rotating path of the elastic flap 62 on the regulating pipe 6 corresponding to the connected hot air pipe 31 and cold air pipe 41, and the limiting holes 621 are arranged in one-to-one correspondence with multiple groups of air outlet holes 61 on the corresponding hot air pipe 31 or cold air pipe 41. Wherein, the bent portion of the elastic flap 62 is inserted into the limiting hole 621 on the corresponding hot air pipe 31 or cold air pipe 41, and the inserted portion of the elastic flap 62 is arc-shaped to facilitate detachment from the limiting hole 621, so as to position the regulating pipe 6 and the corresponding hot air pipe 31 or cold air pipe 41 during the rotation of the regulating pipe 6.

[0057] Refer to Figure 7 and Figure 8 , the housing 1 is provided with an adjusting driving member 63 for facilitating the rotation of the regulating pipe 6. The adjusting driving member 63 includes an adjusting worm gear 631 and an adjusting worm 632 meshing with the adjusting worm gear 631. The regulating pipe 6 is coaxially inserted and fixedly connected to the adjusting worm gear 631. The adjusting worm 632 is rotatably connected to the outer wall of the housing 1. Wherein, the housing 1 protrudes corresponding to the positions of the hot air pipe 31 and the cold air pipe 41, and the protruding portion of the housing 1 is provided with a side opening. The adjusting worm 632 meshes with the adjusting worm gear 631 through the side opening of the protruding portion of the housing 1, so as to control the rotation of the regulating pipe 6 outside the housing 1.

[0058] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An energy-saving oven for gravure printing machines used for decorative paper, characterized in that: It includes a housing (1), a conveying mechanism (2) for conveying a decorative paper tape, a plurality of hot air drying components (3) and a plurality of cold air drying components (4). The conveying mechanism (2) is arranged inside the housing (1). The hot air drying components (3) and the cold air drying components (4) are alternately distributed along the conveying direction of the conveying mechanism (2). The hot air drying component (3) includes a hot air pipe (31) fixedly connected inside the housing (1) and a first air discharge pipe (32). Both the hot air pipe (31) and the first air discharge pipe (32) are arranged to open towards the conveying mechanism (2). The hot air pipe (31) corresponding to the discharge end of the conveying mechanism (2) is used for inputting hot air, and the first air discharge pipe (32) is used for sucking back the blown hot air. And the first air discharge pipe (32) is connected to the hot air pipe (31) of the adjacent hot air drying component (3) along the conveying path of the conveying mechanism (2) through a connecting piece (33). The cold air drying component (4) is used for conveying cold air towards the conveying mechanism (2) and sucking back the cold air. The cold air drying component (4) includes a cold air pipe (41) fixedly connected inside the housing (1) and a second air discharge pipe (42). Both the cold air pipe (41) and the second air discharge pipe (42) are arranged to open towards the conveying mechanism (2). The cold air pipe (41) is used for conveying cold air towards the conveying mechanism (2), and the second air discharge pipe (42) is used for sucking back the blown cold air. Control components (5) for controlling the air outlet width are arranged inside both the cold air pipe (41) and the hot air pipe (31). The air inlets of the cold air pipe (41) and the hot air pipe (31) are arranged in the middle. The control component (5) includes two control pipes (51) and a control screw rod (52) passing through and threadedly connected to the two control pipes (51). The opposite ends of the two control pipes (51) are closed. And the control pipes (51) are fitted and slidably connected to the inside of the cold air pipe (41) or the hot air pipe (31). The control screw rod (52) is a double-headed screw rod with opposite thread directions at both ends. The control screw rod (52) is rotatably connected to the hot air pipe (31) or the cold air pipe (41).

2. The energy-saving oven for intaglio printing machine for decorative paper according to claim 1, characterized in that: A heat insulation layer (11) is provided on the inner wall of the housing (1).

3. The energy-saving oven for gravure printing machine for decorative paper according to claim 1, characterized in that: The air discharge volume of the second air discharge pipe (42) is greater than the air outlet volume of the cold air pipe (41), and the housing (1) is provided with an air extraction part (12) for extracting the excess gas.

4. The energy-saving oven for intaglio printing machine for decorative paper according to claim 1, characterized in that: A plurality of windshields (13) are fixedly connected to the housing (1). The plurality of windshields (13) are arranged corresponding to the hot air drying components (3) and the cold air drying components (4) one by one. The windshield (13) covers the cold air pipe (41) and the second air discharge pipe (42) of the same cold air drying component (4) or the hot air pipe (31) and the first air discharge pipe (32) of the same hot air drying component (3).

5. The energy-saving oven for gravure printing machines for decorative papers according to claim 1, characterized in that: The housing (1) is provided with a driving member (14) for driving a plurality of control screws (52) to rotate simultaneously. The driving member (14) comprises a plurality of drive sprockets (141) and a drive chain (142) sleeved on the plurality of drive sprockets (141). The plurality of drive sprockets (141) are coaxially fixedly connected to the control screws (52) in a one-to-one correspondence, and the edges where the drive sprockets (141) cooperate with the drive chain (142) are arranged opposite to the edges where the adjacent drive sprockets (141) cooperate with the drive chain (142). The housing (1) is provided with a drive motor (143), and the output shaft of the drive motor (143) is coaxially fixedly connected to any one of the drive sprockets (141).

6. The gravure press energy-saving oven for decorative paper according to claim 1, characterized in that: The two control tubes (51) of the same control assembly (5) are provided with limiting rods (511), and the limiting rods (511) are parallel to and fixedly connected to the hot air tube (31) or the cold air tube (41) where they are located.

7. The energy-saving oven for gravure printing machine for decorative paper according to claim 1, characterized in that: The hot air duct (31) and the cold air duct (41) are both provided with a regulating tube (6) for controlling the wind speed of the outlet air. The regulating tube (6) is externally mounted on the hot air duct (31) or the cold air duct (41). The tube wall of the regulating tube (6) is provided with a plurality of groups of air outlet holes (61). The plurality of groups of air outlet holes (61) are distributed around the central axis of the regulating tube (6), and the apertures of the plurality of groups of air outlet holes (61) increase successively. The rotation path of the air outlet holes (61) intersects with the air outlet of the hot air duct (31) or the cold air duct (41).

8. The energy-saving oven for gravure printing machine for decorative paper according to claim 7, characterized in that: The regulating tube (6) is fixedly connected to an elastic paddle (62); the outer wall of the hot air tube (31) or the cold air tube (41) is provided with a plurality of limiting holes (621) on the path of the elastic paddle (62); the elastic paddle (62) is buckled into the limiting holes (621), and the spacing between adjacent limiting holes (621) is adapted to the spacing between two adjacent groups of air outlet holes (61).

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