JP7016482B2 - Drying equipment, printing equipment - Google Patents

Description

The present invention relates to a drying device and a printing device.

As a printing device that applies a liquid to perform printing, there is a printing device that applies a liquid to a continuous paper or the like, then heats it in a heating section and cools it in a cooling section.

Conventionally, a heating unit for drying the recording medium, a cooling unit for cooling the recording medium conveyed from the heating unit, a duct for discharging the air inside the heating unit to the outside of the machine, and an air discharged from the heating unit in the duct. It is known that the duct has a confluence part where air from the cooling part joins, and the air containing water or a solvent from the heating part is cooled and recovered as a liquid (Patent Document 1). ..

JP-A-2017-109477

However, in the configuration disclosed in Patent Document 1, steam is cooled by air from a cooling fan, but since the air depends on the temperature of the room temperature environment and the in-flight environment, the cooling capacity is low and efficient recovery is possible. There is a problem that it cannot be done.

The present invention has been made in view of the above problems, and an object of the present invention is to obtain a stable cooling capacity.

In order to solve the above problems, the drying apparatus according to the present invention is
A heating part that heats the sheet to which the liquid is applied, and
A cooling unit that cools the sheet dried in the heating unit, and a cooling unit.
A cooling unit that supplies cooled circulating fluid to the cooling unit,
The first duct that exhausts the steam generated in the heating part and
The path member through which the circulating fluid flows is provided.
The path member includes a contact portion where the steam flowing in the first duct comes into contact with an outer surface.
The first duct has an upstream duct portion that guides the steam to the outside of the heating portion, an opening that leads to the upstream duct portion, an opening that leads to the outside of the device, and an opening that leads to the waste liquid recovery portion. Including the duct part
It was configured.

According to the present invention, a stable cooling capacity can be obtained.

It is a schematic explanatory drawing of the printing apparatus which concerns on 1st Embodiment of this invention. It is explanatory drawing of the drying apparatus in the 1st Embodiment. It is explanatory drawing of the drying apparatus which concerns on 2nd Embodiment of this invention. It is explanatory drawing of the drying apparatus which concerns on 3rd Embodiment of this invention. It is explanatory drawing of the drying apparatus which concerns on 4th Embodiment of this invention. It is explanatory drawing of the drying apparatus which concerns on 5th Embodiment of this invention. It is explanatory drawing of the drying apparatus which concerns on 6th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, the first embodiment of the present invention will be described. FIG. 1 is a schematic explanatory view of a printing apparatus according to the same embodiment.

The printing device 100 is an inkjet recording device and has a liquid applying unit 101 including a liquid ejection head which is a liquid applying means for ejecting and applying ink which is a liquid of a required color to a continuous paper 110 which is a sheet. is doing.

In the liquid application unit 101, for example, full-line heads 111A, 111B, 111C, 111D for four colors are arranged from the upstream side in the transport direction of the continuous paper 110. Each head 111 applies a liquid of black K, cyan C, magenta M, and yellow Y to the continuous paper 110. The types and numbers of colors are not limited to this.

The continuous paper 110 is unwound from the original winding roll 102, is fed by the transport roller 112 of the transport unit 103 onto the transport guide member 113 arranged to face the liquid applying portion 101, and is guided by the transport guide member 113. Will be transported.

The continuous paper 110 to which the liquid is applied by the liquid application unit 101 is sent by the discharge roller 114 via the drying device 104 according to the present invention, and is taken up by the take-up roll 105.

Next, the drying device according to the first embodiment will be described with reference to FIG. FIG. 2 is an explanatory diagram of the drying device.

The drying device 104 includes a heating unit 10 that heats and dries the continuous paper 110, a cooling unit 20 that cools the continuous paper 110 heated by the heating unit 10, and a cooling unit that supplies the circulating liquid to the cooling unit 20. 30 and a first duct 40 for guiding the steam exhausted from the heating unit 10 are provided.

In the heating unit 10, a heat drum 11 for heating the continuous paper 110 and a plurality of guide rollers 12 for guiding the continuous paper 110 around the heat drum 11 are arranged in the housing 13.

The continuous paper 110 that has passed through the heating unit 10 is guided and conveyed by the transfer drive roller 93 and the driven roller 92, and is sent to the cooling unit 20.

The cooling unit 20 has a plurality of rollers 21 through which the circulating fluid 36 can pass.

The cooling unit 30 has a heat exchange unit 31 that exchanges heat with the circulating liquid 36, a pump 32 that sends the cooled circulating liquid 36 to the cooling unit 20, a cooler 33 that cools the refrigerant, and a high temperature due to the cooler 33. It is provided with a heat dissipation unit 34 and the like, which includes a fan 35 that dissipates heat from the exhausted refrigerant.

The circulating fluid 36 is cooled by passing the circulating fluid 36 through the heat exchange unit 31. The circulating fluid 36 is sent by the pump 32 to the roller 21 of the cooling unit 20 via the supply path 37. By winding the continuous book paper 110 heated by the heating unit 10 around the roller 21 through which the circulating liquid 36 communicates, heat is recovered from the continuous book paper 110 to the circulating liquid 36, and the circulating liquid 36 that has recovered the heat is a recovery path. It is returned to the heat exchange unit 31 via 38 and cooled again.

In the present embodiment, the supply path 37 from the pump 32 and the recovery path 38 to the heat exchange unit 31 are composed of path members 37A and 38A through which the circulating fluid flows. The path members 37A and 38A can be made of, for example, a tube or a pipe.

The refrigerant that has been heated by heat exchange with the circulating fluid 36 in the heat exchange unit 31 is returned to the cooler 33.

Further, the heating unit 10 includes a first duct 40 for exhausting the steam 19 containing the solvent and steam generated when the continuous paper 110 is dried.

The first duct 40 has an upstream duct portion 41 that guides the steam 19 to the outside of the heating portion 10, and a downstream duct portion 42 that intersects with the upstream duct portion 41. The upper opening of the downstream duct portion 42 leads to, for example, the outdoors, and the lower opening leads to the waste liquid recovery tank 44.

On the other hand, a part of the recovery path 38 of the circulating fluid 36 faces the intersection of the upstream duct portion 41 and the downstream duct portion 42 of the first duct 40, and the vapor 19 flowing through the first duct 40 faces the outer surface. A contact portion 51 for contact is provided. That is, the touch portion 51 is formed by a part of the path member 38A forming the recovery path 38, so that the circulating liquid 36 flows in the contact portion 51.

Further, it is provided with a second duct 60 that guides the air 65 warmed by the exhaust heat generated by the heat radiation unit 34 of the cooling unit 30 into the housing 13 of the heating unit 10.

In the drying device 104 configured in this way, the steam 19 generated in the heating unit 10 is guided by the first duct 40 and comes into contact with the outer surface of the contact portion 51. As a result, the solvent contained in the steam 19 condenses, and the dew condensation liquid 70 drops below the downstream duct portion 42 and is recovered in the waste liquid recovery tank 44.

Further, the air 65 warmed by the exhaust heat generated by the heat radiation unit 34 of the cooling unit 30 is sent into the housing 13 of the heating unit 10 through the second duct 60. As a result, dew condensation in the heating unit 10 is prevented, and the inside of the heating unit 10 is preheated, so that the power consumption of the heat drum 11 can be reduced.

In this way, by cooling the steam 19 with the circulating liquid 36 of the cooling unit 30, the cooling capacity is high and a stable cooling capacity can be obtained.

Further, in the cooling unit 30, since the circulating liquid 36 is cooled by the amount of heat used when generating the dew condensation liquid 70 and the amount of heat supplied to the air 65 of the heating unit 10, it is exhausted indoors by the cooler 33. Waste heat is reduced.

Next, the second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an explanatory diagram of a drying device according to the same embodiment.

In the present embodiment, in the configuration of the first embodiment, fins 52 are provided on the outer surface of the contact portion 51.

As a result, the contact area between the solvent vapor 19 and the contact portion becomes large, so that the vapor 19 can be cooled more efficiently.

Next, the third embodiment of the present invention will be described with reference to FIG. FIG. 4 is an explanatory diagram of a drying device according to the same embodiment.

In the present embodiment, in the configuration of the second embodiment, the volume of the housing 13 of the heating unit 10 is made smaller than that of the first and second embodiments. Therefore, the discharge port 60a of the air 65 of the second duct 60 is arranged in the vicinity of the path where the continuous paper 110 is conveyed.

As a result, the preheating effect of the air 65 guided by the second duct 60 can be enhanced.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory diagram of a drying device according to the same embodiment.

In the present embodiment, a path member 54A that branches from the supply path 37 and forms a branch path 54 that sends the circulating liquid 36 to the contact section 51 without passing through the cooling section 20 is provided. That is, a part of the branch path 54 faces the intersection of the upstream duct portion 41 and the downstream duct portion 42 of the first duct 40, and the steam 19 flowing through the first duct 40 comes into contact with the outer surface. It constitutes a part 51.

As a result, the circulating liquid 36 in a state where the heat of the continuous paper 110 is not absorbed can be sent to the contact portion 51, and the cooling capacity is further improved.

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory diagram of a drying device according to the same embodiment.

In the present embodiment, in the configuration of the fourth embodiment, the inner surface of the downstream duct portion 42 is processed to increase the surface area to provide the unevenness 55. Further, a heat insulating material 53 is provided so that dew condensation does not occur on the outer surface of the second duct portion 42.

Thereby, the steam 19 can be cooled more efficiently.

Next, the sixth embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 is an explanatory diagram of a drying device according to the same embodiment.

In the present embodiment, in the configuration of the fourth embodiment, the downstream duct portion 42 has a bellows shape with irregularities on the inner and outer surfaces, and the downstream duct portion 42 is further provided with a passage 56 through which the circulating liquid 36 flows inside the wall. ing.

By forming the second duct portion 42 in a bellows shape, the contact area between the second duct portion 42 and the solvent vapor 19 can be increased.

Then, a branch path 57 that further branches from the branch path 54 and leads to the passage 56 inside the wall of the downstream duct portion 42, and a return path 58 that connects the passage 56 to the branch path 54 on the downstream side of the contact portion 51 are provided. There is.

As a result, the downstream duct portion 42 itself is also cooled by the circulation of the circulating liquid 36, so that the steam 19 can be cooled more efficiently.

In the present application, the liquid applied to the sheet material is not particularly limited, but is preferably one having a viscosity of 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural pigments, such as inks for inkjets, surface treatment liquids, components of electronic and light emitting elements, and formation of electronic circuit resist patterns. It can be used in applications such as liquids and material liquids for three-dimensional modeling.

When a liquid discharge head is used as a liquid applying means, a piezoelectric actuator (laminated piezoelectric element and thin film type piezoelectric element), a thermal actuator using an electric heat conversion element such as a heat generating resistor, and vibration are used as an energy generation source for discharging the liquid. Those using an electrostatic actuator consisting of a plate and a counter electrode are included.

Note that printing in the present application has the same meaning as image formation, recording, printing, printing, and the like.

10 Heating unit 11 Heat drum 12 Guide roller 13 Housing 19 Steam 20 Cooling unit 21 Roller 30 Cooling unit 31 Heat exchange unit 32 Pump 33 Cooler 34 Heat dissipation unit 35 Fan 36 Circulating liquid 37 Supply path 38 Recovery path 38A Path member 40 1st Duct 41 Upstream duct 42 Downstream duct 44 Waste liquid recovery tank 51 Contact 52 Fin 53 Insulation 54 Branch route 54A Route member 55 Concavo-convex 56 Passage 57 Branch route 58 Return route 60 Second duct 60a Discharge port 65 Air 70 Condensation Liquid 92 Driven roller 93 Transport drive roller 100 Printing device 101 Liquid application section 103 Transport section 104 Drying device 110 Continuous book paper (sheet)
111A Full-line type head 111B Full-line type head 111C Full-line type head 111D Full-line type head 102 Original winding roll 105 Winding roll 112 Transfer roller 113 Transfer guide member 114 Discharge roller

Claims (10)

A heating part that heats the sheet to which the liquid is applied, and
A cooling unit that cools the sheet dried in the heating unit, and a cooling unit.
A cooling unit that supplies cooled circulating fluid to the cooling unit,
The first duct that exhausts the steam generated in the heating part and
The path member through which the circulating fluid flows is provided.
The path member includes a contact portion where the steam flowing in the first duct comes into contact with an outer surface.
The first duct has an upstream duct portion that guides the steam to the outside of the heating portion, an opening that leads to the upstream duct portion, an opening that leads to the outside of the device, and an opening that leads to the waste liquid recovery portion. Including the duct part
A drying device characterized by that. The drying apparatus according to claim 1, wherein fins are provided on the outer surface of the contact portion. The drying device according to claim 1 or 2, wherein a heat insulating material is provided on the outer wall surface of the first duct. The drying apparatus according to claim 1 or 2, wherein the first duct has irregularities on the surface. The drying device according to claim 1 or 2, wherein the first duct has a bellows shape. The drying device according to any one of claims 1 to 5, wherein the first duct has a passage through which the circulating liquid flows in the wall portion. The drying apparatus according to any one of claims 1 to 6, further comprising a second duct for guiding the air warmed by the exhaust heat of the cooling unit into the heating unit. The drying apparatus according to claim 7, wherein the second duct has an air discharge port in the vicinity of a path in which the sheet is conveyed in the heating unit. The contact portion is arranged at the intersection of the upstream duct portion and the downstream duct portion.
The drying apparatus according to any one of claims 1 to 8. A liquid applying means for applying a liquid to the sheet material, and
A printing apparatus comprising the drying apparatus according to any one of claims 1 to 9 .

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