JPS58134751A - Drier - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drying device, and more particularly to a drying device configured to dry printing ink applied to a material from a printing machine. The printing device provides a transport device consisting of a carrier for the material passing through a drying device, a plurality of heat generating elements for drying and/or vulcanizing the printing ink applied to the material, and air channels. Has multiple holes or nozzles.

The present invention is not only capable of drying printing inks that can be vulcanized by infrared radiation, but also capable of drying solvent-based printing inks, such as printing inks where drying is primarily carried out by hot air. It is intended to provide information about the device.

First of all, the invention does not depend on the printing machine used, but the invention is based on the fact that it can be used to advantage when the printing machine is a stencil printing machine and the applied layer of printing ink is thick. You should pay attention.

arranging drying devices of various configurations in close proximity to the printing machine;
Methods are already known by which printing inks applied to materials from printing machines can be dried.

The drying processes and methods that can be used are governed by the chemical composition of the ink and the material being printed.

Therefore, methods are also known in which catalytic vulcanization or polymerization takes place when printing inks can be vulcanized by means of elements that emit ultraviolet radiation.

Vulcanization of printing ink is done by radiation vulcanization.
The radiation activates the catalyst in the printing ink and causes the ink layer to polymerize (molecular chain (i)
interlinking )) is performed.

Furthermore, in the case of solvent-based printing inks, methods are also known to ensure the drying process by evaporation, i.e. chemical drying, and for this purpose it has been proposed to flow hot air across the material on the side where the printing ink is applied. has been done.

It is also known that chemical drying, which evaporates the solvent-forming part of the printing ink, can reduce the drying time, increase the amount of air (radiation) and increase the amount of heat delivered.

Furthermore, it is already known to use heat-generating elements that mainly utilize infrared radiation radiated from the element to speed up the drying process.

When commonly used stencil printing inks are dried by evaporation or vulcanization or a combination of these two methods, the drying equipment must be constructed to be compatible with all printing inks, which complicates its construction. It is clear that

Use it, I2. Oeh drying equipment. Regardless of the type, a large part of the production costs are caused by the high energy consumption and high power requirements of the drying equipment.

Energy consumption and power requirements generally depend on the materials used,
O is determined by the ink applied, the thickness of the ink, and the speed of the material through the drying device. When set to dry, power requirements are extremely high.

Heat-generating elements are usually placed in the air stream in close proximity to the nozzle, and therefore these elements act as an obstacle to the air flow and change the flow pattern, particularly the amount of air per unit of time (jet). There were special problems when increasing and decreasing drying time.

It is clear that the energy provided to the drying device should be able to be compatible with the prevailing environment.

It should therefore be possible to stop the drying equipment when there is no material to dry, and it should be possible to increase the power input when one material passes through the drying equipment, and furthermore it should be possible to increase the power input when no material is being used. The sheet material printing ink and its thickness must be matched to the speed of the material.

Therefore, when the drying device is started up, it must be possible to obtain sufficient speed quickly to be able to process thick layers of printing ink.

In this connection, high power inputs are used to quickly create the necessary conditions for heating and drying the printing ink;
Moreover, extremely difficult technical problems arise when reducing the temperature of the air channels.

In order to obtain the desired rapid heating, it is important to use all the energy in the actual drying process and to minimize losses, and it is even more important to control the energy distribution so that the material is not damaged by the heat. It is.

Dry the ink layer on materials where low drying temperatures are required;
There were also problems in ensuring effective drying without overheating. Provide sufficient flow of heated air, especially in conditions where direct thermal radiation cannot be used.

Must be.

When drying at high temperatures, it is not sufficient to have a high temperature air flow; effective direct heat radiation is required, preferably infrared radiation.

Particularly at high printing speeds, there has been a problem in that heat transfer from the heat radiating member to the material is limited.

Typically, drying equipment experiences extremely high temperatures in portions of the material due to direct and/or indirect heat treatment throughout.

At high power inputs, there have been significant technical problems in drying printing inks on materials due to relatively low heat transfer to the material as the outer layer of the ink is usually dried.

It was a further problem to cause the heat application to occur so intensely and quickly that only a portion (the first portion) of the entire drying device was activated during the entire drying of the printing ink.

The invention relates to a drying device configured to be able to dry printing ink applied to material from a printing machine, the drying device comprising a conveying device consisting of a carrier of material passing through the drying device and a device applied to the material. Dry the printing ink and/-! The vulcanization device includes a plurality of heat generating members configured to vulcanize at high temperatures and a plurality of holes or nozzles that provide air passageways. In order to solve the aforementioned problem, according to the invention, each heat-generating member supplies heat to the member for heating the hot air directed through the holes or nozzles to the conveying device and then to the conveying device and placed therein. The printed material is configured to provide heat by radiation to the printed material.

Preferably, the member is corrugated having a downwardly facing portion provided with holes or nozzles and an upwardly facing portion and an adjacent wall portion defining a space containing the one or more heat radiating members, said space being a carrier device. It opens at the bottom end facing the.

Means are provided towards the downwardly facing portion and the adjacent wall portion, and are configured to dissipate heat from the metal to the air. Preferably, the member is provided coplanar with the downwardly and upwardly directed portions and coplanar with the wall portion.

The heat radiating member of the present invention comprises one or more members that radiate infrared radiation and a reflector. be.

A high power input is applied to the member so that the air flow cools the top surface of the printing ink, resulting in effective drying of the ink layer so that a sufficient amount of heat is not transferred to the material.

The technical advantage of the drying device according to this invention is that the sufficient power input given to the thermal radiant member produces high thermal radiation, heating the hot air, and when the thermal radiating member is operated for a long period of time, the heat is transferred to the member. It is possible to heat the hot air transmitted to the dryer, thus reducing the power input, and also to quickly heat the air used because the heated air has a drying effect.

When drying the ink layer of materials compatible with lower temperatures,
The device of this invention allows easy temperature control.

You can perform the verses.

Additionally, the combination of effective infrared radiant elements and air flow to the printing ink ensures that low but effective drying of the printing ink is achieved by heat transfer to the material.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a drying device configured for a printing machine, in particular a stencil printing machine, arranged on a secondary surface ftl. The actual drying device is designated by reference number (2). The drying device consists of a support (3) that supports a conveying device in the form of a conveying path, which can be moved into the water surface. This conveying path (4) conveys the printed products and sheets provided with printing ink or material provided by the printing machine from position A to position B, which is arranged on a depositing device (not shown). The sheet or material to be printed passes through a drying device (2) to dry the printing ink forming the printed image. Dry for this purpose, 1
1'1 The device (2) is not shown in Figure 1, but has a plurality of members, generates heated air, and transfers power input to the heat radiator C.
radiotor) 4 or to a member that generates infrared rays. These components are installed in the upper part of the drying device (3b), and the control device for the components is arranged in the lower part of the drying device (C3a). The heated air flows around the device through channels (not shown) in the upper part (3b).
), and in this part (3b) the air can pass through a plurality of nozzles directed in the plane of the conveying path above the water surface.

The portion (4b) of the conveying path is arranged at a height that allows it to receive the printed sheet or material from the printing machine when the printed sheet or material is fed from the printing machine at a predetermined height. This is very important. Part (4b) must be fixed. The same can be said of the portion (4c) which is the discharge portion of the conveyance path (4). 1st
In the figure, the conveyance path (4) is at a distance (a) from the part (3b).
It should be noted that 1 is located in particular in the plane (5a) formed by the /slash of part (3b). The space (,) must be sufficient to convey the printed material into the drying device when the material is high enough.

Finally, as shown in Figure 1, the part (3b) has a hinge (8
) can be bent upwards to the position indicated by the dotted line, first detecting the nozzle and then part (
3b) can be detected, the reflector can be cleaned and the heat radiating member can be replaced.

The spacing (,) can be adjusted by means of the arm (6), which rotates around the center of rotation and thereby raises or lowers the transport path (4) of the drying part.

The control panel is designated by the reference numeral (7). FIG. 2 shows a portion of a drying apparatus in which the principles of the invention may be used. Materials are designated here by the reference symbol (lO) and printing ink provided by the printing machine is designated by the reference symbol 0. The drying device (3) comprises a conveying device (4'I) in the form of a net-shaped path arranged on a plurality of rollers (6) and a roller (5'I) which provides a carrier of the material (1α) as it passes through the drying device. ).Furthermore, this embodiment comprises at least two, for example four as shown, members (11,
(16a), (16b), and (16c), the number of which is not important to this invention.

Each member 01, (16a), (16b) that radiates infrared rays
) and (16e) connect the nozzles for hot air to each member U.
, (16g), etc. The material and printing ink can first be exposed to the infrared rays of member 01 to vulcanize the printing ink θ, and then to a hot or cold air stream directed from the nozzle α barrel.

However, the material and printing ink can be treated by means of cooled or heated air (16b).
) and (16c) is important. It should also be possible to distribute the air flow above the surface of the material (10) so that the air can pass through a specific nozzle α barrel. The temperature curve of the upper surface of the layer of ink α given to the material (101) as it passes through the drying device (101).In the absence of air flow through the nozzle end, the temperature curve given by the infrared radiating member H~ (16c) is shown. The heat generated, preferably infrared heat, increases the temperature as shown by Kerr 10ω.If the air flow crosses the nozzle end, then the top surface of the material +1111 becomes part 0
Under the influence of the air flow from both nozzles close to part 01 at η, the temperature on the upper surface of the material increases slightly, as shown by the curve (t2).A cold air flow is used. In this case, the temperature curve can be further reduced.

The curves (large) and (t2) correspond to the temperature of the upper surface of the material α0). The temperature of the material (1o) is virtually the same since the air flow ensures that no heat transfer occurs to the material (IQ).

In particular, the present invention is directed to the generation and radiation of materials (
! This was done in response to the need to quickly generate the necessary heat transfer to the ink (+odor) layer applied to the ink (0), thereby ensuring rapid drying.

This is a member (II, (16a), (1) that radiates infrared rays.
6b) and (16c) by providing sufficient power input.

As shown in FIG. 4, each heat radiating member (14 to (
Such high temperatures can be quickly obtained by sufficient power input to the component (16c), which provides direct direct exposure to the material (IQ's ink-coated portion (12g)) positioned below the member. Therefore, the action of each heat radiating member H is particularly important.

Only direct radiation of heat to the material (10) is used here. However, when sufficient power input is applied to the heat radiating member 0φ, heat is transferred to the member (2'4), the flow of air passing through the hole or nozzle aF!j, oh is heated, and the hot air is transferred to the conveying path (4). and the material (10
).

Thermal radiation member (II) turned red when the switch was turned on for the first time.
It takes some time for the member (3) to first transfer radiant heat to the material (lO) and heat up, and even more time for the air stream to heat up.

However, when the air stream (2) is heated to the required level, the power input to the heat radiating member can be reduced, substantially reducing the overall heat transfer effect of sections (IZ*) and (12b). Can be made the same. This does not depend on whether the heat transfer is measured after the heat radiant element has been switched on or after the conditions between hot air and heat radiation have stabilized.

In one embodiment of the invention, the member @ is a hole or nozzle (
Downward part (22a) where 181,081 is provided
The 0 member (goods), which is a wave-shaped member having The space example is opened at the bottom end facing the conveyance path (4), thereby directing radiant heat from the member (+@) to the material (l
O).

Means, not shown in FIG. 4, configured to dissipate heat from the metal to the air are provided adjacent to the downwardly directed portions of the wall portions (22c) and (22d). These means may be guide rails or the like.

The member (goods) is provided with a downward facing portion C22a), an upward facing portion (22b), and wall portions (22c) and (22d).

The number of heat radiating members (I), the number of ultraviolet radiating members and whether one or more members are assigned to each space, and other distribution issues are determined by the scope of application.

As shown in FIG. 4, in this invention, the auxiliary heat radiating members include a member Q0 that radiates ultraviolet rays, a reflector (to)
It also relates to a drying device of the type mentioned above, comprising:

This is constructed in such a way that it can reflect the light rays guided from the conveyor path (4) towards the conveyor path (4), that is to say upwardly in FIG. For this purpose, an angular part is provided in the upper part of the reflector, the top end of which is directed towards the part radiating ultraviolet radiation, part 1 material (2υ is placed at a distance from the conveying path (4)). This configuration ensures that the upwardly directed UV radiation is reflected towards the material (4) on the side of the member @l).

It is of particular technical importance that the air flow on each side of the part through the nozzles O [9, M is directed towards and distributed around the material (lO) and the printing ink H. This allows the material to be heated without the risk of heat transfer to the material.
and the persistence of heat in the printing ink CIZg).
Extremely high power inputs to the member α barrels can be obtained without the need for .

As a result, the drying time is shortened, the temperature rise of the material (111I) is limited, and the drying process can be carried out in only a portion of the entire length of the drying device, the front portion. Variations are possible.

::1 , □, C11-・1″ 1:.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a side view of the embodiment of the invention, Fig. 3 is a graph showing temperature changes of material passing through a drying device, and Fig. 4 is a heating FIG. 3 is a perspective view showing a preferred embodiment of the direction of the radiating member. (4)・・・・・・・・・・・・Transport device (1ol...
・・・・・・・・・Material +1,・(12a)・・・・
...Printing ink a drop... Heat radiation member (111......hole or nozzle (2)... ...Air flow patent applicant Subesia Silkscreen Maskinel Actier Borag agent Ken Shinji (one other person) Procedural amendment C method)] 2) 1985 3 ξ 2s Japan Patent Office Director Oto 1.Display of the incident 1973 - Hoganrei 320 ffi
83392, Name 04 Kameaki Drying device 3, Person making the amendment Relationship to the case w # Authorization 1 Person, agent 〒604 9 List of attached documents■ Amended specification 1 copy

Claims (6)

[Claims] (1) a conveying device (4) consisting of a carrier for the material (1o) through a drying device, i.e. a conveying path and a number of thermal radiations configured to dry and/or vulcanize the printing ink applied to the material; Part H1al),! :. A drying device for drying printing ink (12a) applied to a material (111il) mainly from a printing machine, comprising a number of holes (!8 or nozzles) providing passages for air flow, each thermal radiating member θφ first imparts heat to the component () to heat the stream of air (2) which is directed through the holes or nozzles (ll) to the conveying device (4), and then the material [1 (
A drying device, characterized in that it is configured to supply heat by radiation to the printing ink (12) applied to the drying device. (2) The member (2) has an upward portion (22b) and a proximal wall portion (goods) that forms a space (goods) surrounding the heat radiating member H.
22c), (22d), the space (24) being open at the bottom end towards the conveying device (4). (3) Means arranged to radiate heat from the metal to the air are provided adjacent to the downwardly directed portions of the wall portions (22c), (22d).
2) The drying device described in item 2). (4) Claims (1) to 13 in which the member is provided with downward and upward facing portions and wall portions.
) The drying device according to any one of paragraphs 1 and 2. (5) The heat radiating member Q is made of a member that emits infrared rays, and air flow is guided to each side of the member to reduce the temperature rise of printing ink and materials. The drying device according to any one of items 1 to 14). (6) a conveying device (4) or path forming a carrier for the material +101 passing through the drying device and a radiant member of vI number θ→, @ for drying and/or vulcanizing the printing ink applied to the material; Drying printing ink (126), which can be vulcanized by infrared radiation, is applied to a material (101) from a printing machine comprising a plurality of holes or nozzles positioned between it and one providing a channel for air flow. 7, □.#Qf9ul'!7JK
2, applying heat to the member (2) for heating the air stream (2) passing through the hole or nozzle head directed to the conveying device (4) in □Imvw, and then applying it to the material (lO); The member is configured to apply heat by direct radiation to the printed ink θ, the member being configured to first reflect the heat rays, then absorb the heat, and further emit the heat to be absorbed by the air flow. A drying device characterized in that it is provided with means. )・1 1: