Gum dipping system and method for decorative paper

Abstract

The invention discloses a gum dipping system and method for decorative paper. The gum dipping system comprises a machine body, a plurality of heating boxes are arranged in the machine body, flowing heat conduction oil is arranged in the heating boxes, a gum storage box is further arranged on one side of the machine body, a U-shaped heating pipe is arranged in the gum storage box, the U-shaped heating pipe communicates with the heating boxes, and the heating boxes are communicated with the gum storage box. A glue storage box is arranged in the machine body, dipping glue is loaded in the glue storage box, a guide device for releasing and guiding decorative paper is arranged on one side of the machine body, the decorative paper is dipped and dried twice through the guide device, and an energy-saving heat supply device for supplying heat to the heating box and the U-shaped heating pipe is further arranged in the machine body. Decorative paper can be subjected to two times of gum dipping and multiple times of drying and heating in one device, the device is small in size and low in cost, the energy-saving heat supply device is arranged, a heat conduction oil flowing channel is formed, the flowing efficiency of heat conduction oil can be improved, the heating box and the U-shaped heating pipe are heated at the same time, and efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of decorative paper processing, and specifically to an impregnating system and method for decorative paper. Background Art

[0002] After the decorative paper is processed, it needs to be impregnated with glue and heated to form an impregnated decorative paper that can be used for decorative veneering. In the prior art, the decorative paper generally needs to be impregnated with glue twice and dried to form a stable impregnated decorative paper. When performing secondary impregnation with glue and drying in the prior art, two sets of equipment are required to respectively achieve this function. Therefore, the equipment cost is relatively high, and the equipment volume is relatively large, occupying a large area. And during the drying process, generally, the heating method using natural gas combustion is adopted, and the impregnated paper is dried by a heat conduction plate. During this process, the heat is not fully recycled, resulting in high energy consumption. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an impregnating system and method for decorative paper, which can simultaneously achieve secondary impregnation with glue and heating and have a good energy-saving heating function.

[0004] The present invention is realized through the following technical solutions: An impregnating system and method for decorative paper of the present invention includes a machine body. A plurality of heating boxes are arranged inside the machine body, and flowing heat-conducting oil is arranged inside the heating boxes. A glue storage tank is further arranged on one side of the machine body. A U-shaped heating pipe is arranged inside the glue storage tank, and the U-shaped heating pipe is communicated with the heating boxes. Impregnating glue is loaded inside the glue storage tank. A guiding device for releasing and guiding the decorative paper is arranged on one side of the machine body. The guiding device impregnates the decorative paper with glue twice and dries it twice. An energy-saving heating device for supplying heat to the heating boxes and the U-shaped heating pipe is also arranged inside the machine body.

[0005] A further technical solution is that the guiding device includes a loading reel, a first pressing roller, a second pressing roller, a third pressing roller, a fourth pressing roller, a fifth pressing roller, a sixth pressing roller, a seventh pressing roller, and an eighth pressing roller. A decorative paper reel for releasing the decorative paper is arranged on the loading reel. After the decorative paper passes through the first pressing roller, the second pressing roller, the third pressing roller, the fourth pressing roller, the fifth pressing roller, the sixth pressing roller, the seventh pressing roller, and the eighth pressing roller in sequence, the functions of the first impregnation with glue, the first drying, the second impregnation with glue, and the second drying are realized under the heating action of the heating boxes and the U-shaped heating pipe.

[0006] Further technical solution: a first pressing roller is arranged on the left side of the feeding reel, a second pressing roller is arranged on the left side of the first pressing roller, and a third pressing roller is arranged in the glue storage tank. The decorative paper passes through the first pressing roller and then winds downward from the upper outer surface of the second pressing roller, and then winds toward the upper left side after bypassing from the lower bottom of the third pressing roller. The decorative paper is dipped in glue for the first time when it is on one side of the third pressing roller. A plurality of fourth pressing rollers are arranged in the machine body, and the decorative paper led out from the bottom of the third pressing roller slides over the upper outer surface of the fourth pressing roller.

[0007] Further technical solution: one upper and one lower fifth pressing roller are also arranged in the machine body. After the decorative paper turns on the outer surface of the fifth pressing roller, it winds downward and then winds toward the right. A plurality of sixth pressing rollers are also arranged in the machine body. The decorative paper winds from the bottom outer surface of the fifth pressing roller and then winds to the right from the upper outer surface of the sixth pressing roller. A seventh pressing roller is arranged in the glue storage tank. The decorative paper winds downward around the bottom outer surface of the seventh pressing roller and then winds toward the upper left side, so that the decorative paper is dipped in glue for the second time on one side of the seventh pressing roller. A plurality of eighth pressing rollers are also arranged in the machine body. The decorative paper after the second dipping in glue extends to the left from the upper outer surface of the eighth pressing roller and is led out of the machine body.

[0008] Further technical solution: the energy-saving heating device includes a combustion chamber arranged in the machine body, an oil storage chamber is also arranged at the rear side of the combustion chamber, a U-shaped heating pipe is arranged in the glue storage tank, and the U-shaped heating pipe is communicated with the heating box and the oil storage chamber. A plurality of direct-burning conduits are arranged in the combustion chamber, and the direct-burning conduits are communicated with the oil storage chamber and the heating box. A plurality of natural gas burners for heating the direct-burning conduits are arranged in the combustion chamber. Heat-conducting oil is arranged in the oil storage chamber, the direct-burning conduits, the heating box and the U-shaped heating pipe. A waste heat recovery component is also arranged in the machine body, which is used for recovering the waste heat generated by the natural gas burner burning natural gas and making it exchange heat with the heat-conducting oil in the oil storage chamber.

[0009] Further technical solution: a first oil pipe is communicated and arranged on one side of the oil storage chamber, a first oil pump is communicated and arranged on one side of the first oil pipe, the first oil pump is communicated and arranged with the U-shaped heating pipe, a second oil pipe is communicated and arranged on one side of the U-shaped heating pipe, a plurality of second oil pumps are communicated and arranged on the left side of the second oil pipe, a third oil pipe is communicated and arranged on one side of the second oil pump, and the third oil pipe is communicated with the inside of the heating box. The heating box is divided into a liquid guiding chamber bent forward and backward, and both ends of the liquid guiding chamber are communicated with the third oil pipe and the direct-burning conduit respectively.

[0010] Further technical solution: The waste heat recovery component includes an elbow pipe arranged at the top of the machine body. The elbow pipe is communicated with the combustion chamber. A plurality of fan structures for guiding waste gas and heat-conducting oil from top to bottom are rotatably arranged in the oil storage chamber. A plurality of gas storage chambers are further arranged on the upper side of the oil storage chamber. The gas storage chambers are communicated with the elbow pipe.

[0011] Further technical solution: An exhaust gas chamber is further arranged at the bottom of the oil storage chamber. The exhaust gas chamber is communicated with the gas storage chamber through the fan structure. The fan structure includes a wind wheel. An inner sleeve is arranged inside the wind wheel. A spiral fan wheel is arranged on the lower side of the wind wheel. The spiral fan wheel is hollow inside. An outer cylinder is further arranged on the outside of the wind wheel. The outer cylinder is rotatably arranged between the exhaust gas chamber and the oil storage chamber. The outer cylinder and the spiral fan wheel form a cylindrical space that is separately partitioned inside and outside. After the spiral fan wheel rotates, the heat-conducting oil in the oil storage chamber is guided from top to bottom. After the wind wheel rotates, the waste gas inside the spiral fan wheel and the outer cylinder is guided from top to bottom.

[0012] The method for heating the heat-conducting oil by this system is as follows: First step, a plurality of fans are arranged at the bottom of the combustion chamber. The fans work to introduce air into the combustion chamber. After the natural gas burner works, it heats the heat-conducting oil in the direct-fired conduit. The first oil pump and the second oil pump work to pump the heat-conducting oil. Second step, the first oil pump pumps the heat-conducting oil from the first oil pipe into the U-shaped heating pipe, and the second oil pump pumps the heat-conducting oil from the second oil pipe into the third oil pipe. Third step, the heat-conducting oil circulates in the direct-fired conduit, the oil storage chamber, the first oil pipe, the first oil pump, the U-shaped heating pipe, the second oil pipe, the second oil pump, the third oil pipe and the heating box to supply heat to the heating box and the U-shaped heating pipe. Fourth step, when the natural gas burner burns, it also heats up the combustion chamber. The oil storage chamber and the combustion chamber also conduct heat exchange to increase the temperature of the heat-conducting oil in the oil storage chamber.

[0013] The method for recovering heat from the combustion waste gas of the natural gas burner by this system is as follows: First step, the high-temperature waste gas generated by the natural gas burner is introduced into the gas storage chamber through the elbow pipe. Second step, after the motor works, it drives the rotating shaft and the fan structure to rotate. The wind wheel inside the fan structure guides the waste gas in the gas storage chamber into the exhaust gas chamber. The spiral fan wheel guides the heat-conducting oil in the oil storage chamber from top to bottom. The fan structure enables the high-temperature waste gas to conduct heat exchange with the heat-conducting oil. Third step, an exhaust gas conduit is further arranged in the exhaust gas chamber. The waste gas in the exhaust gas chamber is discharged from the exhaust gas conduit to the external space.

[0014] The beneficial effects of the present invention are as follows: First, through the specific structural settings of the guiding device, the decorative paper can be impregnated with glue twice and dried and heated multiple times in one device, with a relatively small device volume and low cost.

[0015] Second, by setting up an energy-saving heating device, through a heating box, a direct-fired conduit, an oil storage chamber, a first oil pipe, a first oil pump, a U-shaped heating pipe, a second oil pipe, a second oil pump, and a third oil pipe, a heat-conducting oil circulation channel is formed, which can improve the flow efficiency of the heat-conducting oil and can heat the heating box and the U-shaped heating pipe simultaneously, with relatively high efficiency.

[0016] Third, by arranging the oil storage chamber at the rear side of the combustion chamber, the effect of raising the temperature of the heat-conducting oil is further improved.

[0017] Fourth, by setting up a fan blade structure, and arranging a spiral fan wheel below the wind wheel, and arranging outer cylinders on the upper and lower sides of the spiral fan wheel, the interior of the formed fan blade structure can be used to guide waste gas, and the spiral fan wheel can be used to guide the heat-conducting oil. After waste gas is introduced into the spiral fan wheel and the outer cylinders, the high-temperature waste gas can exchange heat with the heat-conducting oil to achieve the function of energy saving.

[0018] Fifth, by setting up an air storage chamber and a sleeve, the rotating shaft rotates through the sleeve and extends into the air storage chamber, so that waste gas can be introduced into the air storage chamber through a bent pipe, and the rotating shaft can also drive the fan blade structure to rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] For ease of explanation, the present invention will be described in detail by the following specific embodiments and accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of an impregnating system and method for a decorative paper of the present invention; Figure 2 It is Figure 1 a schematic diagram of the top cross-sectional structure of the system in Figure 3 It is Figure 1 a schematic diagram of the rear cross-sectional structure of the system in Figure 4 It is Figure 3 a schematic diagram of the bottom view structure of the system in Figure 5 It is Figure 3 a schematic diagram of the structure of the U-shaped heating pipe in Figure 6 It is Figure 5 a schematic diagram of part A in Figure 7 It is Figure 5 a schematic diagram of part B in In the figure, a feeding reel 11, a first pressure roller 12, a glue storage box 13, a third pressure roller 14, a seventh pressure roller 15, a U-shaped heating tube 16, an eighth pressure roller 17, a machine body 18, a heating box 19, a sixth pressure roller 21, a fifth pressure roller 22, a fourth pressure roller 23, a sleeve 24, a motor 25, a bend pipe 26, a third oil pipe 27, a second oil pump 28, a second oil pipe 29, a second pressure roller 31, a combustion chamber 41, a fan 42, an exhaust gas duct 43, a direct-burning duct 44, a natural gas burner 45, an oil storage chamber 47, a first oil pipe 48, a first oil pump 49, an air storage chamber 51, a rotating shaft 52, an exhaust gas chamber 54, a wind wheel 62, a spiral fan wheel 63, an inner sleeve 64, and an outer cylinder 65. DETAILED DESCRIPTION

[0021] like Figures 1-7 As shown, the present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front and back directions mentioned below are Figure 1 The up-down, left-right, front-back directions of the projection relationship are consistent. A system and method for dipping decorative paper of the present invention comprises a machine body 18, a plurality of heating boxes 19 are arranged in the machine body 18, flowing heat transfer oil is arranged in the heating box 19, a glue storage box 13 is also arranged on one side of the machine body 18, a U-shaped heating pipe 16 is arranged in the glue storage box 13, the U-shaped heating pipe 16 is connected to the heating box 19, the glue storage box 13 is loaded with dipping glue, a guiding device for releasing and guiding the decorative paper is arranged on one side of the machine body 18, the guiding device dips the decorative paper twice and dries it twice, and an energy-saving heating device for supplying heat to the heating box 19 and the U-shaped heating pipe 16 is also arranged in the machine body 18.

[0022] Advantageously, the impregnating glue is generally melamine glue.

[0023] Advantageously, the guiding device includes a feeding reel 11, a first pressing roller 12, a second pressing roller 31, a third pressing roller 14, a fourth pressing roller 23, a fifth pressing roller 22, a sixth pressing roller 21, a seventh pressing roller 15 and an eighth pressing roller 17, wherein the feeding reel 11, the first pressing roller 12, the second pressing roller 31, the fifth pressing roller 22, the third pressing roller 14 and the seventh pressing roller 15 are all powered rollers, and the fourth pressing roller 23, the fifth pressing roller 22 and the eighth pressing roller 17 are unpowered rollers. The fifth pressing roller 22 and the eighth pressing roller 17 are configured as power rollers, the loading reel 11 is used to cover the decorative paper reel, and the decorative paper reel can release the decorative paper. After the decorative paper passes through the first pressing roller 12, the second pressing roller 31, the third pressing roller 14, the fourth pressing roller 23, the fifth pressing roller 22, the sixth pressing roller 21, the seventh pressing roller 15 and the eighth pressing roller 17 in sequence, the first dipping, the first drying, the second dipping and the second drying are realized under the heating action of the heating box 19 and the U-shaped heating tube 16.

[0024] Beneficially, a first pressure roller 12 is provided on the left side of the feeding reel 11, a second pressure roller 31 is provided on the left side of the first pressure roller 12, a third pressure roller 14 is provided in the glue storage tank 13, and the decorative paper passes through the first pressure roller 12 and then winds downward around the outer surface on the upper side of the second pressure roller 31, and winds around the bottom on the lower side of the third pressure roller 14 and then winds toward the upper left side. When passing by the third pressure roller 14, the decorative paper is impregnated with glue for the first time.

[0025] Beneficially, a plurality of fourth pressure rollers 23 are provided in the machine body 18, and the decorative paper led out from the bottom of the third pressure roller 14 slides over the outer surface on the upper side of the fourth pressure rollers 23. One upper and one lower fifth pressure rollers 22 are also provided in the machine body 18. After turning on the outer surface of the fifth pressure rollers 22, the decorative paper winds downward and then winds toward the right. A plurality of sixth pressure rollers 21 are also provided in the machine body 18. After winding around the outer surface at the bottom of the fifth pressure rollers 22, the decorative paper winds to the right over the outer surface on the upper side of the sixth pressure rollers 21. A seventh pressure roller 15 is provided in the glue storage tank 13. After winding downward around the outer surface at the bottom of the seventh pressure roller 15, the decorative paper winds toward the upper left side, so that the decorative paper is impregnated with glue for the second time on one side of the seventh pressure roller 15.

[0026] Beneficially, a plurality of eighth pressure rollers 17 are also provided in the machine body 18, and the decorative paper after the second impregnation with glue extends leftward over the outer surface on the upper side of the eighth pressure rollers 17 and is led out of the machine body 18.

[0027] Beneficially, after the decorative paper is introduced into the machine body 18, it moves between the heating boxes 19, and after the heating boxes 19 generate heat, the decorative paper is dried.

[0028] Beneficially, the energy-saving heating device includes a combustion chamber 41 provided in the machine body 18, an oil storage chamber 47 is further provided at the rear side of the combustion chamber 41, a U-shaped heating pipe 16 is provided in the glue storage tank 13, and the U-shaped heating pipe 16 is communicated with the heating boxes 19 and the oil storage chamber 47. A plurality of direct combustion conduits 44 are provided in the combustion chamber 41, and the direct combustion conduits 44 are communicated with the oil storage chamber 47 and the heating boxes 19. A plurality of natural gas burners 45 for heating the direct combustion conduits 44 are provided in the combustion chamber 41. Heat-conducting oil is provided in the oil storage chamber 47, the direct combustion conduits 44, the heating boxes 19 and the U-shaped heating pipe 16. A waste heat recovery assembly is further provided in the machine body for recovering the waste heat generated by the natural gas burners 45 burning natural gas and performing heat exchange with the heat-conducting oil in the oil storage chamber 47.

[0029] Beneficially, the natural gas burner 45 is a prior art, and can burn natural gas in an instant-heating manner to heat the direct combustion conduits 44. The direct combustion conduits 44 are made of a high-melting-point metal and can be made of an alloy material to avoid deformation.

[0030] Beneficially, a first oil pipe 48 is communicatively connected to one side of the oil storage cavity 47, a first oil pump 49 is communicatively connected to one side of the first oil pipe 48, and the first oil pump 49 is communicatively connected to the U-shaped heating pipe 16.

[0031] Beneficially, a second oil pipe 29 is communicatively connected to one side of the U-shaped heating pipe 16, a plurality of second oil pumps 28 are communicatively connected to the left side of the second oil pipe 29, a third oil pipe 27 is communicatively connected to one side of the second oil pump 28, and the third oil pipe 27 is communicatively connected to the inside of the heating box 19.

[0032] Beneficially, a plurality of gas storage cavities 51 are arranged inside the heating box 19, the gas storage cavities 51 are arranged alternately before and after, dividing the inside of the heating box 19 into a liquid guide cavity bent back and forth, and both ends of the liquid guide cavity are respectively communicatively connected to the third oil pipe 27 and the direct-fired conduit 44.

[0033] Beneficially, the waste heat recovery assembly includes a bent pipe 26 arranged on the top of the machine body 18, the bent pipe 26 will be communicatively connected to the combustion cavity 41, a plurality of fan structures for guiding waste gas and heat-conducting oil from top to bottom are rotatably arranged in the oil storage cavity 47, and a plurality of gas storage cavities 51 are further arranged on the upper side of the oil storage cavity 47, and the gas storage cavities 51 are communicatively connected to the bent pipe 26.

[0034] Beneficially, a plurality of fans 42 are arranged at the bottom of the combustion cavity 41, and the fans 42 are used to introduce air from the external space into the combustion cavity 41 to provide oxygen for the combustion of the natural gas burner 45.

[0035] Beneficially, an exhaust gas cavity 54 is further arranged at the bottom of the oil storage cavity 47, the exhaust gas cavity 54 is communicatively connected to the gas storage cavity 51 through a fan structure, an exhaust gas conduit 43 is further arranged in the exhaust gas cavity 54, the exhaust gas conduit 43 is used to discharge exhaust gas, and the exhaust gas conduit 43 can be connected to an exhaust gas purifier to purify the tail gas.

[0036] Beneficially, the fan structure includes a wind wheel 62, an inner sleeve 64 is arranged inside the wind wheel 62, a spiral fan wheel 63 is arranged on the lower side of the wind wheel 62, the spiral fan wheel 63 is hollow inside, an outer cylinder 65 is further arranged on the outer side of the wind wheel 62, the outer cylinder 65 is connected between the spiral fan wheels 63, above the uppermost spiral fan wheel 63 and below the lowermost spiral fan wheel 63, the outer cylinder 65 is rotatably arranged between the exhaust gas cavity 54 and the oil storage cavity 47, the outer cylinder 65 and the spiral fan wheel 63 form a separately partitioned cylindrical space inside and outside, after the spiral fan wheel 63 rotates, the heat-conducting oil in the oil storage cavity 47 is guided from top to bottom, and after the wind wheel 62 rotates, the exhaust gas inside the spiral fan wheel 63 and the outer cylinder 65 is guided from top to bottom.

[0037] Beneficially, a motor 25 is provided at the top of the machine body 18, and a sleeve 24 is provided on the elbow pipe 26. A rotating shaft 52 is power-connected to one side of the motor 25. The rotating shaft 52 rotatably passes through the sleeve 24 and extends into the air storage cavity 51. The rotating shaft 52 passes through the inner sleeve 64 and is fixed to provide rotational power for the fan blade structure.

[0038] The method for the system to perform secondary dipping and heating of decorative paper is as follows: First step, the decorative paper is drawn from the outer surface of the feeding reel 11 and passes through between the first pressing rollers 12. After passing through the second pressing roller 31, it moves downward to the lower side of the third pressing roller 14, and the impregnating glue in the glue storage tank 13 is used to dip the decorative paper for the first time; Second step, when the decorative paper passes through the fourth pressing roller 23, it is dried on both sides under the heating of the heating box 19, and then dried again after passing through the fifth pressing roller 22 and the sixth pressing roller 21; Third step, the decorative paper is secondarily dipped in the glue storage tank 13 after bypassing the bottom of the seventh pressing roller 15; Fourth step, the impregnated paper then passes through the upper surface of the eighth pressing roller 17, and then the heating box 19 dries the impregnated paper on both sides again, and then it is led out of the device from the left to the next process.

[0039] The method for the system to heat the heat-conducting oil is as follows: First step, the fan 42 works to introduce air into the combustion chamber 41. After the natural gas burner 45 works, it heats the heat-conducting oil in the direct-fired conduit 44. The first oil pump 49 and the second oil pump 28 work to pump the heat-conducting oil; Second step, the first oil pump 49 pumps the heat-conducting oil into the U-shaped heating pipe 16 through the first oil pipe 48, and the second oil pump 28 pumps the heat-conducting oil into the third oil pipe 27 through the second oil pipe 29; Third step, the heat-conducting oil circulates in the direct-fired conduit 44, the oil storage cavity 47, the first oil pipe 48, the first oil pump 49, the U-shaped heating pipe 16, the second oil pipe 29, the second oil pump 28, the third oil pipe 27 and the heating box 19 to supply heat to the heating box 19 and the U-shaped heating pipe 16, so that the heating box 19 can play a drying role and the U-shaped heating pipe 16 can play a role in heating the impregnating glue; Fourth step, when the natural gas burner 45 burns, it will also raise the temperature of the combustion chamber 41, and the oil storage cavity 47 and the combustion chamber 41 will also conduct heat exchange to raise the temperature of the heat-conducting oil in the oil storage cavity 47 to save the heating time of the heat-conducting oil.

[0040] The method for the system to recover the heat of the combustion exhaust gas of the natural gas burner 45 is as follows: First step, the high-temperature exhaust gas generated by the natural gas burner 45 is introduced into the air storage cavity 51 through the elbow pipe 26; Second step, after the motor 25 works, it drives the rotating shaft 52 and the fan blade structure to rotate. The wind wheel 62 inside the fan blade structure guides the exhaust gas in the air storage cavity 51 into the exhaust gas cavity 54, and the spiral fan wheel 63 guides the heat-conducting oil in the oil storage cavity 47 from top to bottom. The fan blade structure enables the high-temperature exhaust gas to exchange heat with the heat-conducting oil; Third step, the exhaust gas in the exhaust gas cavity 54 is discharged into the external space through the exhaust gas conduit 43.

[0041] The above are only specific implementation methods of the present invention, but the protection scope of the present invention is not limited to this. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention; therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A decorative paper dipping system, comprising a machine body (18), wherein a plurality of heating boxes (19) are arranged in the machine body (18), wherein flowing heat transfer oil is arranged in the heating boxes (19), and a glue storage box (13) is arranged on one side of the machine body (18), wherein a U-shaped heating pipe (16) is arranged in the glue storage box (13), wherein the machine body (18) comprises: The U-shaped heating tube (16) is connected to the heating box (19), the glue storage box (13) is loaded with impregnated glue, and a guiding device for releasing and guiding the decorative paper is arranged on one side of the machine body (18), the guiding device impregnates the decorative paper twice and dries it twice, and an energy-saving heating device for supplying heat to the heating box (19) and the U-shaped heating tube (16) is also arranged in the machine body (18).

2. The decorative paper dipping system according to claim 1, characterized in that: The guiding device comprises a feeding reel (11), a first pressing roller (12), a second pressing roller (31), a third pressing roller (14), a fourth pressing roller (23), a fifth pressing roller (22), a sixth pressing roller (21), a seventh pressing roller (15) and an eighth pressing roller (17); the feeding reel (11) is provided with a decorative paper reel for releasing decorative paper; after the decorative paper passes through the first pressing roller (12), the second pressing roller (31), the third pressing roller (14), the fourth pressing roller (23), the fifth pressing roller (22), the sixth pressing roller (21), the seventh pressing roller (15) and the eighth pressing roller (17) in sequence, the decorative paper is heated by a heating box (19) and a U-shaped heating tube (16) to achieve the functions of first dipping, first drying, second dipping and second drying.

3. The decorative paper dipping system according to claim 1, characterized in that: The energy-saving heating device comprises a combustion chamber (41) arranged in the machine body (18), an oil storage chamber (47) is further arranged at the rear side of the combustion chamber (41), a U-shaped heating pipe (16) is arranged in the rubber storage box (13), the U-shaped heating pipe (16) is connected with the heating box (19) and the oil storage chamber (47), a plurality of direct-burning conduits (44) are arranged in the combustion chamber (41), the direct-burning conduits (44) are connected with the oil storage chamber (47) and the heating box (19), a plurality of natural gas burners (45) for heating the direct-burning conduits (44) are arranged in the combustion chamber (41), heat transfer oil is arranged in the oil storage chamber (47), the direct-burning conduits (44), the heating box (19) and the U-shaped heating pipe (16), and a waste heat recovery component is further arranged in the machine body for recovering waste heat generated by the natural gas burner (45) burning natural gas and exchanging heat with the heat transfer oil in the oil storage chamber (47).

4. The decorative paper dipping system according to claim 3, characterized in that: A first oil pipe (48) is connected to one side of the oil storage chamber (47), a first oil pump (49) is connected to one side of the first oil pipe (48), the first oil pump (49) is connected to the U-shaped heating pipe (16), a second oil pipe (29) is connected to one side of the U-shaped heating pipe (16), a plurality of second oil pumps (28) are connected to the left side of the second oil pipe (29), a third oil pipe (27) is connected to one side of the second oil pump (28), the third oil pipe (27) is connected to the interior of the heating box (19), the interior of the heating box (19) is divided into a liquid guiding chamber that is bent forward and backward, and the two ends of the liquid guiding chamber are respectively connected to the third oil pipe (27) and the straight-burning conduit (44).

5. The decorative paper dipping system according to claim 3, characterized in that: The waste heat recovery component comprises a curved pipe (26) arranged on the top of the body (18), the curved pipe (26) being connected to the combustion chamber (41), a plurality of fan blade structures for guiding the waste gas and heat transfer oil from top to bottom being rotatably arranged in the oil storage chamber (47), and a plurality of air storage chambers (51) being arranged on the upper side of the oil storage chamber (47), the air storage chambers (51) being connected to the curved pipe (26).

6. The decorative paper dipping system according to claim 5, characterized in that: An exhaust gas chamber (54) is also provided at the bottom of the oil storage chamber (47). The exhaust gas chamber (54) is connected to the air storage chamber (51) through a fan blade structure. The fan blade structure includes a wind wheel (62). An internal sleeve (64) is provided inside the wind wheel (62). A spiral fan wheel (63) is provided on the lower side of the wind wheel (62). The spiral fan wheel (63) is hollow inside. An outer cylinder (65) is also provided on the outer side of the wind wheel (62).

7. The decorative paper dipping system according to claim 6, characterized in that: The outer cylinder (65) is rotatably arranged between the exhaust gas chamber (54) and the oil storage chamber (47); the outer cylinder (65) and the spiral impeller (63) form a cylindrical space separated into inner and outer parts respectively; after the spiral impeller (63) rotates, the heat transfer oil in the oil storage chamber (47) is guided from top to bottom; after the wind wheel (62) rotates, the exhaust gas inside the spiral impeller (63) and the outer cylinder (65) is guided from top to bottom.

8. The decorative paper dipping system according to claim 6, characterized in that: A motor (25) is arranged on the top of the machine body (18), a sleeve (24) is arranged on the bent pipe (26), a rotating shaft (52) is arranged on one side of the motor (25) for power connection, the rotating shaft (52) rotates through the sleeve (24) and then extends into the air storage chamber (51), and the rotating shaft (52) passes through the internal sleeve (64) and is fixed.

9. A method for heating heat transfer oil using a decorative paper impregnation system according to any one of claims 1 to 8, characterized in that: In the first step, a plurality of fans (42) are arranged at the bottom of the combustion chamber (41). The fans (42) are operated to introduce air into the combustion chamber (41). The natural gas burner (45) is operated to heat the heat transfer oil in the direct-burning conduit (44). The first oil pump (49) and the second oil pump (28) are operated to pump the heat transfer oil. In the second step, the first oil pump (49) pumps the heat transfer oil from the first oil pipe (48) into the U-shaped heating pipe (16). The second oil pump (28) pumps the heat transfer oil from the second oil pipe (29) into the third oil pipe (27). In the third step, The heat transfer oil circulates in the direct-burning conduit (44), the oil storage chamber (47), the first oil pipe (48), the first oil pump (49), the U-shaped heating pipe (16), the second oil pipe (29), the second oil pump (28), the third oil pipe (27) and the heating box (19) to provide heat to the heating box (19) and the U-shaped heating pipe (16); in the fourth step, when the natural gas burner (45) is burning, it will also heat up the combustion chamber (41), and the oil storage chamber (47) and the combustion chamber (41) will also exchange heat to increase the temperature of the heat transfer oil in the oil storage chamber (47).

10. A method for recovering waste gas heat using a decorative paper impregnation system according to any one of claims 1 to 8, characterized in that: In the first step, the high-temperature exhaust gas generated by the natural gas burner (45) is introduced into the gas storage chamber (51) through the curved pipe (26); in the second step, after the motor (25) starts working, it drives the rotating shaft (52) and the fan blade structure to rotate, and the wind wheel (62) inside the fan blade structure guides the exhaust gas in the gas storage chamber (51) into the exhaust gas chamber (54), and the spiral fan wheel (63) guides the heat transfer oil in the oil storage chamber (47) from top to bottom, and the fan blade structure enables the high-temperature exhaust gas to exchange heat with the heat transfer oil; in the third step, an exhaust gas conduit (43) is also provided in the exhaust gas chamber (54), and the exhaust gas in the exhaust gas chamber (54) is discharged from the exhaust gas conduit (43) to the external space.

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