CN113733759B - Double-sided printing machine - Google Patents
Double-sided printing machine Download PDFInfo
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- CN113733759B CN113733759B CN202111034858.6A CN202111034858A CN113733759B CN 113733759 B CN113733759 B CN 113733759B CN 202111034858 A CN202111034858 A CN 202111034858A CN 113733759 B CN113733759 B CN 113733759B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4078—Printing on textile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J11/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
- B41J11/0015—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
- B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
- B41J11/0024—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using conduction means, e.g. by using a heated platen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/60—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for printing on both faces of the printing material
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention relates to a double-sided printing machine, which belongs to the field of printing machines and comprises a first printing unit, a second printing unit and a drying mechanism, wherein the first printing unit, the second printing unit and the drying mechanism are sequentially arranged along the advancing direction of cloth; the printing machine further comprises a cloth guide unit, after the cloth is sprayed and printed by the first printing unit and the second printing unit, the front surface of the cloth faces the first drying surface and the back surface of the cloth faces the second drying surface under the guidance of the cloth guide unit. Compare traditional hot air drying mode, this scheme need not to dry with the help of the fan, so alright avoid the fan to blow the dust to the problem that the cloth surface caused the stamp flaw.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a double-sided printing machine, and belongs to the field of printing machines.
[ background of the invention ]
In the manufacturing process of cloth, in order to improve the aesthetic property of the cloth, printing is generally performed on the cloth, the step is mainly completed by a printing machine, the existing printing machine generally comprises a single-sided printing machine and a double-sided printing machine, the former performs printing on one side of the cloth, and the latter performs printing on two sides of the cloth.
In the prior art, in order to ensure that printed patterns can be quickly dried after printing of cloth is completed, a drying mechanism is usually arranged on a printing machine so as to quickly dry and form printing ink forming the printed patterns, a hot air drying mode is generally adopted in a traditional drying mode, namely, a hot air blower is used for blowing hot air to the surface of the cloth so as to dry the cloth, and the hot air drying mode has certain disadvantages in use; secondly, the hot air drying method is difficult to be applied to the cloth with double-sided printing, and because the two sides of the cloth are to be dried, at least 2 groups of hot air machines are needed to respectively dry the two sides of the cloth by blowing.
[ summary of the invention ]
The invention aims to overcome the defects of the prior art and provide a double-sided printing machine.
The technical scheme adopted by the invention is as follows:
a double-sided printing machine comprises a first printing unit, a second printing unit and a drying mechanism which are sequentially arranged along the advancing direction of cloth, wherein the first printing unit and the second printing unit are respectively used for spraying and printing the front side and the back side of the cloth; the printing machine further comprises a cloth guiding unit, the cloth guiding unit is used for guiding the cloth, the front surface of the cloth faces to the first drying surface and the back surface of the cloth faces to the second drying surface after the cloth is subjected to spray printing through the first printing unit and the second printing unit under the guiding of the cloth guiding unit, after the cloth is guided out of the first drying surface and is guided to the second drying surface, and the cloth only contacts with the cloth guiding unit in the front surface.
The advantage of this scheme of adoption lies in:
at first, in this scheme, through setting up the hot plate to at the inside runner that sets up of hot plate, during the stoving, to pouring into the heat medium in the runner, so the hot plate after the heat medium heating alright dry the cloth that the stamp was accomplished, compare traditional hot air drying mode, this scheme need not to dry with the help of the fan, so alright avoid the fan to blow the dust to the problem that the cloth surface caused the stamp flaw.
Secondly, establish the hot plate structure of runner in this scheme and can make the hot plate possess two heating surfaces simultaneously, first face and the second face of drying promptly, so alright dry simultaneously the front and the reverse side of cloth, two faces of drying are direct towards the positive and negative of cloth moreover, compare the hot-blast stoving mode, can make the cloth be heated more evenly undoubtedly to there is better stoving effect.
Moreover, in the scheme, the purpose of double-sided drying can be realized by only one heating plate, if a traditional hot air drying mode is adopted, at least two hot air blowers are required to respectively face the fabric, even if only one hot air blower is adopted, the fabric can be dried on two sides, the specific design of the air path is inevitably required, the design cost is probably increased, and in order to match the air path, the fabric guide rollers are probably specially arranged at the position of the drying area to change the trend of the fabric, so that the printed surface of the fabric is probably contacted with one or more fabric guide rollers, and the printed pattern of the fabric is influenced.
In addition, the scheme depends on a special guiding mode of the guiding unit, namely under the guiding of the cloth guiding unit, after the cloth is subjected to spray printing by the first printing unit and the second printing unit, the front surface of the cloth faces the first drying surface, the back surface of the cloth faces the second drying surface, and after the cloth is led out from the first drying surface and before the cloth is guided to the second drying surface, only the front surface of the cloth is contacted with the cloth guiding unit; so, one can guarantee that the positive and negative of cloth carries out two-sided stoving towards first face of drying and second face of drying respectively, two come, the front of cloth is when drying through first face of drying, the reverse side of cloth probably not drying completely this moment, at this moment, if directly when leading the reverse side contact of cloth the cloth unit, the stamp pattern of cloth reverse side is worn and torn very easily, and in this scheme, through the direction of guide unit, can guarantee its reverse side before being dried by second face of drying, the reverse side of cloth can not contact with leading the cloth unit, so in order to protect the stamp pattern of cloth reverse side.
Furthermore, the cloth guide unit comprises a plurality of cloth guide rollers, wherein at least part of the cloth guide rollers are positioned below the heating plate, and part of the cloth guide rollers are positioned above the heating plate.
Further, the drying mechanism comprises an oven with a hollow interior, and the heating plate is vertically arranged in the oven.
Furthermore, the drying mechanism also comprises a container for holding the heating medium and a pump for pumping the heating medium in the container, and the container comprises a medium outlet for discharging the heating medium and a medium return outlet for recovering the heating medium; the pump pumps the heat medium into the flow channel through the medium outlet, and the heat medium in the flow channel finally flows back into the container through the medium return port; the drying mechanism also comprises a heat source for heating the heating medium in the container.
Further, the cloth preheating device further comprises a preheating mechanism, and the preheating mechanism is used for preheating the cloth before the cloth passes through the first printing unit and the second printing unit.
Further, preheat the mechanism and include the preheating cabinet and locate the inside heat exchanger of preheating cabinet, the heat exchanger includes import and export, in heat medium gets into the heat exchanger through the import after the runner is discharged, in the heat medium in the heat exchanger flows back into the container through the export.
Further, the preheating mechanism comprises a heat exchange tube, a fan and an air pipe; the heat exchange tube is arranged in the container, one end of the heat exchange tube is communicated with the air outlet end of the fan, the other end of the heat exchange tube is communicated with the air pipe, and the air pipe is provided with a plurality of spray heads facing the cloth.
Further, the heat exchange tube comprises a plurality of bent segments, and the heat exchange tube is at least partially immersed in the heating medium in the container; or the heat medium is liquid, and the heat exchange tube is suspended above the liquid level of the heat medium.
Furthermore, the air pipe comprises a first branch pipe and a second branch pipe, and the first branch pipe and the second branch pipe are respectively positioned on the front side and the back side of the cloth; the first branch pipe and the second branch pipe are respectively provided with a spray head, wherein the spray head on the first branch pipe faces the front side of the cloth, and the spray head on the second branch pipe faces the back side of the cloth; one end of the first branch pipe is communicated with one end of the second branch pipe, one of the other ends of the first branch pipe and the second branch pipe is closed, and the other end of the first branch pipe is communicated with one end, far away from the fan, of the heat exchange pipe.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic structural view of a cloth guide unit according to the present invention;
FIG. 3 is a schematic view of a heating plate according to the present invention;
FIG. 4 is a schematic structural view of embodiment 2;
fig. 5 is a schematic structural view of the air duct.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used for convenience in describing embodiments and simplifying descriptions, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Example 1:
as shown in fig. 1-2, the present embodiment provides a double-sided printing machine, which includes a first printing unit 1, a second printing unit 2 and a drying mechanism, which are sequentially arranged along a cloth advancing direction.
First printing unit 1 and second printing unit 2 are used for spouting the seal to the front and the reverse side of cloth respectively, and first printing unit 1 and second printing unit 2 all can adopt current spout seal formula stamp, and during the printing, the cloth unreels to the cloth by unreeling frame 01, leads first printing unit 1, second printing unit 2, stoving mechanism in proper order with the cloth through the deflector roll, finally carries out the rolling by rolling up frame 02.
The drying mechanism comprises a heating plate 3, the heating plate 3 comprises a first drying surface and a second drying surface which are oppositely arranged, a flow channel 31 for flowing of a heat supply medium is arranged in the heating plate 3, and the first drying surface and the second drying surface are heated through the heat medium in the flow channel 31; heating plate 3 is rectangle platelike structure, and it is heat conduction material, for example copper etc. the lateral wall at 3 both sides of heating plate constitutes first face of drying and the second face of drying, and when heat medium flowed in runner 31, heat exchange is realized with heating plate 3 in meeting of heat medium self, makes heating plate 3 be heated, and two faces of drying by heating plate 3 finally distribute out the heat in order to dry the cloth.
The heat medium refers to a medium for providing heat, and is mainly a fluid medium, such as gas or hot oil, and the like, and the hot oil is preferably adopted; through setting up hot plate 3 to at the inside runner 31 that sets up of hot plate 3, during the stoving, to injecting the heat medium in the runner 31, so hot plate 3 through the heat medium heating after alright dry the cloth that the stamp was accomplished, compare traditional hot-blast stoving mode, this scheme need not to dry with the help of fan 74, so alright avoid fan 74 to blow the problem that causes the stamp flaw to the cloth surface with the dust.
The printing machine further comprises a cloth guiding unit, the cloth guiding unit is used for guiding the cloth, after the cloth is sprayed and printed through the first printing unit 1 and the second printing unit 2, the front surface of the cloth faces to the first drying surface under the guiding of the cloth guiding unit, the back surface of the cloth faces to the second drying surface, after the cloth is guided out of the first drying surface and is guided to the second drying surface, and the cloth only contacts with the cloth guiding unit in the front surface.
Establish the hot plate 3 structure of runner 31 in this scheme and can make hot plate 3 possess two heating surfaces simultaneously, first face and the second face of drying promptly, so alright dry simultaneously the front and the reverse side of cloth simultaneously, two faces of drying are direct towards the positive and negative of cloth in addition, compare the hot-blast stoving mode, can make the cloth be heated more evenly undoubtedly to there is better stoving effect, because hot-blast stoving can be because of the inhomogeneous heat that causes of wind-force distribution.
Moreover, in this scheme, only one heating plate 3 can realize the purpose of double-sided drying, if a traditional hot air drying mode is adopted, at least two air heaters are needed to respectively face the fabric, even if only one air heater is adopted, double-sided drying of the fabric can be ensured, specific design is inevitably needed to be made on the air path, the design cost is probably increased, and in order to match the air path, the fabric guide rollers are probably specially arranged at the position of the drying area to change the trend of the fabric, so that the printing surface of the fabric is probably contacted with one or more fabric guide rollers, and the printing pattern of the fabric is influenced.
In addition, the scheme depends on a special guiding mode of the guiding unit, namely, under the guiding of the cloth guiding unit, after the cloth is subjected to spray printing through the first printing unit 1 and the second printing unit 2, the front surface of the cloth faces to the first drying surface, the back surface of the cloth faces to the second drying surface, and after the cloth is led out from the first drying surface and before the cloth is guided to the second drying surface, only the front surface of the cloth is in contact with the cloth guiding unit; so, one can guarantee that the positive and negative of cloth carries out two-sided stoving towards first face of drying and second face of drying respectively, two come, the front of cloth is when drying through first face of drying, the reverse side of cloth probably not drying completely this moment, at this moment, if directly when leading the reverse side contact of cloth the cloth unit, the stamp pattern of cloth reverse side is worn and torn very easily, and in this scheme, through the direction of guide unit, can guarantee its reverse side before being dried by second face of drying, the reverse side of cloth can not contact with leading the cloth unit, so in order to protect the stamp pattern of cloth reverse side.
The specific structure of the cloth guiding unit is as follows: referring to fig. 2, the cloth guide unit includes a plurality of cloth guide rollers, wherein at least a part of the cloth guide rollers are located below the heating plate 3, and a part of the cloth guide rollers are located above the heating plate 3, in this embodiment, as shown in fig. 1, 5 cloth guide rollers are used, which are respectively marked as a first cloth guide roller 51, a second cloth guide roller 52, a third cloth guide roller 53, a fourth cloth guide roller 54, and a fifth cloth guide roller 55; the heating plate 3 is vertically arranged, the first cloth guide roller 51 and the second cloth guide roller 52 are positioned above the heating plate 3, the third cloth guide roller 53, the fourth cloth guide roller 54 and the fifth cloth guide roller 55 are arranged below the heating plate 3, the first cloth guide roller 51, the second cloth guide roller 52, the fourth cloth guide roller 54 and the fifth cloth guide roller 55 are all positioned on the left side of the heating plate 3, and the third cloth guide roller 53 is positioned on the right side of the heating plate 3.
When the cloth is guided, the cloth is vertically pulled down from the second printing unit 2 and placed on the right side of the first drying surface, and the front surface of the cloth faces the first drying surface; the front side of the fabric is then wound on a third fabric guide roller 53, a fourth fabric guide roller 54, a first fabric guide roller 51 and a second fabric guide roller 52 in sequence, and finally the fabric is pulled down from the left side of the heating plate 3 and then guided to the winding frame 02 through a fifth fabric guide roller 55.
Through leading the cloth with the fabric guide roll according to this kind of specific mode, can guarantee that the front and the reverse side of cloth are located hot plate 3 both sides respectively to dry simultaneously, the front of cloth is being dried the back by first stoving face in addition, before the reverse side is not dried by second stoving face, its reverse side can not contact with the fabric guide roll, so be unlikely to by the wear of fabric guide roll in order to guarantee the stamp pattern of cloth reverse side. And this kind of mode of arranging the fabric guide roller can make the cloth fully expand in the left of hot plate 3 after drying through first stoving face, has improved the transmission path of cloth for the cloth can carry out once naturally and dry on this transmission path.
In order to improve the drying efficiency, in this embodiment, the drying mechanism includes inside hollow oven 30, in heating plate 3 vertically set up oven 30, divide into two spaces about with oven 30 through heating plate 3 for the cloth business turn over, through setting up oven 30, can make the heat that heating plate 3 gived off can comparatively concentrate inside oven 30 for the cloth can be better by the stoving.
In order to continuously supply high-temperature heat medium into the flow passage 31, in the embodiment, the drying mechanism further includes a container 61 for containing heat medium and a pump 62 for pumping the heat medium in the container 61, and it is noted that the pump 62 is determined according to the type of the selected heat medium, for example, the heat medium is selected to be gas, the air pump 62 is used, and if the heat medium is liquid, the liquid pump 62 is used, and in the embodiment, hot oil is used as the heat medium.
The container 61 comprises a medium outlet for discharging the heating medium and a medium return outlet for recovering the heating medium; the liquid inlet end of the pump 62 is communicated with the liquid outlet to pump the heat medium into the flow channel 31, one end of the flow channel 31 is communicated with the liquid outlet end of the pump 62, and the other end of the flow channel 31 is communicated with the medium return port, so that the heat medium is pumped into the flow channel 31 through the pump 62, flows in the flow channel 31 and finally flows back into the container 61 through the medium return port; the drying mechanism further comprises a heat source of a heating medium in the heating container 61, wherein the heat source can be an electric heating element such as an electric heating tube, and the like, and can also adopt a boiler heating mode, and the drying mechanism rotates according to actual needs. It can be seen that the high-temperature heating medium continuously flows in the flow passage 31 to exchange heat with the heating plate 3.
Of course, in order to improve the heat exchange effect, in this embodiment, as shown in fig. 3, the flow channel 31 is in an S-shaped serpentine shape, so as to increase the flow path of the flow channel 31, so that the heating plate 3 is filled with as much heating medium as possible, and the heating medium and the heating plate 3 are subjected to sufficient heat exchange, so as to improve the heat exchange effect.
In order to improve the printing effect of cloth, this embodiment still includes preheating mechanism, preheating mechanism is used for the cloth to preheat the cloth before first printing unit 1 and second printing unit 2, and the preheating through preheating mechanism can make the cloth possess certain temperature before printing for follow-up when printing, the attached to on the cloth that printing ink can be better, but also the drying and shaping that printing ink can be faster when can making the printing.
The preheating mechanism structure that this embodiment adopted does: as shown in fig. 1, the preheating mechanism includes a preheating tank 71 and a heat exchanger 72 disposed inside the preheating tank 71, the heat exchanger 72 includes an inlet and an outlet, the heating medium is discharged through a flow passage 31 and then enters the heat exchanger 72 through the inlet, and the heating medium in the heat exchanger 72 flows back into the container 61 through the outlet.
The heat exchanger 72 may be a serpentine coil, and the two ends thereof are respectively an outlet and an inlet, the inlet is communicated with one end of the flow channel 31 far away from the pump 62 through a pipeline, and the outlet is communicated with the recycling port of the container 61 through a pipeline.
Therefore, the heat medium flowing out of the flow channel 31 does not directly flow back into the container 61 at first, but flows into the heat exchanger 72 along the pipeline, and at the moment, the heat medium still has a certain amount of waste heat, so that when flowing in the heat exchanger 72, the heat medium exchanges heat with the heat exchanger 72, and the heat is dissipated into the preheating tank 71 through the heat exchanger 72 so as to preheat the cloth entering the preheating tank 71. Therefore, the heating medium used for preheating is the heating medium used for drying, in other words, the heating medium used in the scheme has two functions, one of the two functions can be used for drying, and the waste heat of the two functions can be reused for preheating.
Example 2
The present embodiment is different from embodiment 1 in that the preheating mechanism adopted is different, and in the present embodiment, as shown in fig. 4 and 5, the preheating mechanism includes a heat exchange pipe 73, a fan 74, and an air pipe 75; the heat exchange tube 73 is arranged in the container 61, one end of the heat exchange tube 73 is communicated with the air outlet end of the fan 74, the other end of the heat exchange tube 73 is communicated with the air pipe 75, and the air pipe 75 is provided with a plurality of spray heads 76 facing the cloth.
Because the heat exchange tube 73 is arranged in the container 61, heat in the container 61 can be transferred to the heat exchange tube 73, when the fan 74 blows air into the heat exchange tube 73, the air entering the heat exchange tube 73 can exchange heat with the heat exchange tube 73, the air is heated through the heat exchange tube 73 to form hot air, the hot air is guided to the air pipe 75 and finally sprayed to the cloth through the spray head 76. In addition, in the present embodiment, the heat energy for forming the hot air is directly supplied from the inside of the container 61, so that the temperature is higher, and the formation of the hot air is more facilitated.
In order to make the heat exchange tube 73 sufficiently heated, in the embodiment, the heat exchange tube 73 includes a plurality of bent segments, for example, the heat exchange tube 73 is arranged in an S shape, so that the stroke of the heat exchange tube 73 in the container 61 is increased, and sufficient heat exchange can be performed; the heat exchange pipe 73 is at least partially immersed in the heating medium in the container 61, for example, when the heating medium is liquid, a part or all of the heat exchange pipe 73 is immersed in the liquid so as to be in full contact with the liquid for heat exchange; or, the heat medium is liquid, the heat exchange tube 73 is suspended above the liquid level of the heat medium, and at the moment, the heat exchange tube 73 mainly exchanges heat with the hot gas above the heat exchange tube 73.
In order to enable the air duct 75 to preheat and purge both sides of the cloth material simultaneously, as shown in fig. 5, the air duct 75 includes a first branch 752 and a second branch 751, and the first branch 752 and the second branch 751 are respectively located on the front side and the back side of the cloth material; the first branch pipe 752 and the second branch pipe 751 are respectively provided with a spray head 76, wherein the spray head 76 on the first branch pipe 752 faces the front side of the cloth, and the spray head 76 on the second branch pipe 751 faces the back side of the cloth; the first branch tube 752 and the second branch tube 751 are communicated with each other at one end to form a U-shaped tube structure, one of the other ends of the first branch tube 752 and the second branch tube 751 is closed, and the other end of the first branch tube 752 and the other end of the second branch tube 751 are communicated with one end of the heat exchange tube 73 far away from the fan 74, i.e., the U-shaped tube is closed at one end and connected to the heat exchange tube 73 at the other end.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (9)
1. A double-sided printing machine comprises a first printing unit, a second printing unit and a drying mechanism which are sequentially arranged along the advancing direction of cloth, wherein the first printing unit and the second printing unit are respectively used for spraying and printing the front side and the back side of the cloth; the printing machine further comprises a cloth guiding unit, the cloth guiding unit is used for guiding the cloth, the front surface of the cloth faces to the first drying surface and the back surface of the cloth faces to the second drying surface after the cloth is subjected to spray printing through the first printing unit and the second printing unit under the guiding of the cloth guiding unit, after the cloth is guided out of the first drying surface and before the cloth is guided to the second drying surface, the cloth only contacts with the cloth guiding unit in the front surface.
2. A machine as claimed in claim 1, wherein the cloth guide unit comprises a plurality of cloth guide rollers, at least some of which are located below the heating plate and some of which are located above the heating plate.
3. A machine according to claim 1, wherein the drying mechanism comprises an oven with a hollow interior, and the heating plate is arranged vertically in the oven.
4. A double-sided printing machine as claimed in claim 1, wherein the drying mechanism further comprises a container for containing the heating medium and a pump for pumping the heating medium in the container, the container comprising a medium outlet for discharging the heating medium and a medium return outlet for recovering the heating medium; the pump pumps the heat medium into the flow channel through the medium outlet, and the heat medium in the flow channel finally flows back into the container through the medium return port; the drying mechanism also comprises a heat source for heating the heating medium in the container.
5. A perfecting press as claimed in claim 4, further comprising a preheating mechanism for preheating the cloth prior to passing through the first and second printing units.
6. A double-sided printing machine according to claim 5, wherein the preheating mechanism comprises a preheating box and a heat exchanger arranged in the preheating box, the heat exchanger comprises an inlet and an outlet, the heating medium is discharged through the flow channel and then enters the heat exchanger through the inlet, and the heating medium in the heat exchanger flows back into the container through the outlet.
7. A double-sided printing machine according to claim 5, wherein the preheating mechanism comprises a heat exchange pipe, a fan and an air pipe; the heat exchange tube is arranged in the container, one end of the heat exchange tube is communicated with the air outlet end of the fan, the other end of the heat exchange tube is communicated with the air pipe, and the air pipe is provided with a plurality of spray heads facing the cloth.
8. A double-sided printing machine as claimed in claim 7, wherein the heat exchange tube comprises a plurality of bent segments, and the heat exchange tube is at least partially immersed in the heating medium in the container; or the heat medium is liquid, and the heat exchange tube is suspended above the liquid level of the heat medium.
9. A double sided embossing machine as claimed in claim 7, wherein the air duct comprises a first branch and a second branch, the first branch and the second branch being located on the front side and the back side of the fabric, respectively; the first branch pipe and the second branch pipe are respectively provided with a spray head, wherein the spray head on the first branch pipe faces the front side of the cloth, and the spray head on the second branch pipe faces the back side of the cloth; one end of the first branch pipe is communicated with one end of the second branch pipe, one of the other ends of the first branch pipe and the second branch pipe is closed, and the other end of the first branch pipe is communicated with one end, far away from the fan, of the heat exchange pipe.
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| CN202111034858.6A CN113733759B (en) | 2021-09-04 | 2021-09-04 | Double-sided printing machine |
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