JPH0443040A - Printing method and its apparatus - Google Patents

Abstract

PURPOSE:To enable printing to be performed without considering an influence on ink due to temperature of the open air by a method wherein a thermo module capable of heating and cooling by conversion of a direction of a current to be applied is installed to a flooding. CONSTITUTION:A thermo module 9 capable of heating and cooling by conversion of a direction of a current to be applied is installed to a squeegee 5 for stencilling printing ink set on a printing plate 3 by extending and/or to a flooding 6 for scraping up the extended printing ink. Thereby, printing is performed while viscosity of the printing ink on the printing plate 3 is being kept constant.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing method and an apparatus therefor, and specifically relates to a printing method and an apparatus therefor in screen printing or textile printing.

[Conventional technology]

Screen printing, which is a special type of printing on metal plates, tubes, ceramics, synthetic resin films, etc., is a screen printing plate in which a photosensitive agent layer is formed on the screen using a screen printing plate obtained from the original drawing. A predetermined pattern drawn on the original drawing is printed on the material by contact exposure or projection exposure, and then the surface of the printed plate material is treated with a solvent to remove the photosensitive agent layer in the area to be printed, and the mesh of the screen is removed. A screen printing plate (hereinafter simply referred to as a printing plate) was obtained in which a portion of a predetermined printing pattern was left transparent, and printing ink was placed on the thus obtained printing plate, and the ink was placed on the bottom surface through the printing plate. The printing pattern is printed on the printing material by coating it on the printing material, and it is unlike other printing techniques in that it can clearly form a thick printed film with relatively low printing pressure. It has special characteristics.

In addition, stencil printing, which prints on fabric by mixing nine colorants and glue,
A pattern, such as a metal plate with a pattern cut out, is placed on top of the fabric, and then colored glue is applied to it and the process is carried out.

Therefore, screen printing is a printing device used for pattern textile printing.The printing ink or color paste (hereinafter collectively referred to as simply ink) is placed on the printing plate or the L curve of the pattern. ) is used to extend and imprint the squeegee,! It is equipped with a rubber spatula known as the ``Rubber Spatula'' and an ink returner consisting of a metal plate-like body for collecting ink from the printing plate or mold after imprinting.

ing.

[Problem to be solved by the invention]

Screen printing also 1. ! When the room temperature rises, the viscosity of the ink used for textile printing decreases to low FU2.
This increases the fluidity of the screen, causing more ink to pass through the screen than necessary, causing bleeding! :Become.

When the room temperature further rises, the solvent contained in the ink volatilizes, resulting in an increase in the viscosity of the ink, changes in ink plasticity, and a decrease in the fluidity of the ink. The ink does not pass through the screen at 4 points, which causes printing misalignment.On the other hand, even when the room temperature is low, the viscosity of the ink increases and the fluidity of the ink decreases due to changes in ink plasticity. , the ink passes through the screen, which causes misalignment of the print.

The same applies to colored pastes used in textile printing.

Therefore, when printing these types of products, the ink is heated in advance when the room temperature is low, and in the summer when the room temperature is high, the entire room is cooled to bring the temperature of the ink closer to room temperature.

However, managing such ink is extremely complicated.
It is extremely difficult to maintain proper ink viscosity.

In view of the current situation, this invention provides a printing method that can always maintain a constant viscosity of the ink used during screen or type textile printing to produce clear printing without any stains or deviations. The purpose is to share this device with others.

[Means to solve the problem]

In order to achieve the above object, the printing method of the present invention includes a squeegee or ' for spreading the printing ink set on the printing plate 1-1 and collecting the spread printing ink. 21 thermometers, which can heat and cool by changing the direction of the applied current, are attached to the ink return plate to maintain the viscosity of the printing ink on the printing plate at a constant level. It is characterized by the following features:

In addition, the printing equipment used in the above method; It is characterized by being equipped with a module that performs heating and cooling through conversion.

The thermo module used in the second invention can perform heating and cooling by changing the direction of the applied current. type) of two types of cell conductor elements r,
This is a thermomodule constructed by combining a heat conduction plate and a heat sink.

Thermal module t, 1:, one heat conductive plate is made, for example, inside the squeegee 15, - formation 1 - and notch Jp t (
Place the other heat dissipation plate on the outside &m, apply electricity C, 2T, heat the heat conduction plate and apply it to the squeegee B, turn the electricity on electrode 1 in reverse L, 2, 2 and M. 7 is to cool the squeegee by reversing the application side and the cooling side to the heat conduction plate, and the temperature of the seamo module is controlled more effectively by Kokichi, which detects the ink temperature with a temperature sensor. , the viscosity of the ink can be kept constant at -7.

[For production]

In the printing method of this invention, a thermo module is attached to the squeegee and/or ink returner, and printing is performed while maintaining the temperature of the ink on the printing plate at a constant level, so the viscosity of the ink is always constant. As a result of maintaining a constant level, it is possible to always print clearly.

Furthermore, since the printing apparatus used in the printing method of the first and second inventions is equipped with a thermo module on the squeegee and/or the ink return, the ink on the printing plate is heated or heated by contacting the squeegee and/or the ink return. cooled,
It can always maintain a constant temperature.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The printing method and apparatus thereof according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of a screen printing apparatus l equipped with a printing apparatus of the present invention, which basically consists of a printing table 2, a frame member 4 that holds down a printing plate 3, and a screen that moves on the printing plate 3. Like the squeegee 5, it is composed of an ink returner 6, and both the squeegee 5 and the ink returner 6 are connected to a moving mechanism (not shown) for moving vertically and horizontally via a support 7. A printing medium 8 to be printed is placed on the top surface of the printing table 2, and a printing plate 3 with a predetermined printing pattern 3a formed thereon is placed thereon. After pressing the periphery of the printing plate 3 with the frame member 4, printing is performed by spreading ink onto the printing plate 3 with a squeegee 5 set on the support 7 set above the printing plate 3. After the printing is completed, the ink remaining on the printing plate 3 is collected by an ink return plate 6 which is also provided above the printing plate 3 via a support 7.

In the screen printing device 1, the squeegee 5 that spreads ink and makes imprinting is made of an elastic plate-like material such as synthetic rubber and has a predetermined thickness. It has a tapered shape and the thickness gradually decreases to form a tip with a generally sharp cross section.A cut is made at the center of the thickness at an appropriate depth from the upper edge, and the thermo module 9 is installed in the cut. be.

Further, the ink returner 6 is also equipped with the thermo module 9.

The thermo module 9 used in the printing apparatus of the present invention has a heating/cooling element 10 as shown in FIG.
A heat conduction plate 11 and a heat dissipation plate 12 coupled to the heating/cooling element 10, a temperature sensor 13 that detects the temperature of the ink and transmits it to the heating/cooling element 10, and the heating/cooling element 1.
0, and a DC power supply 14 that supplies power to

The heating/cooling element 10 has an N-type semiconductor n and a P-type semiconductor p arranged alternately, and an electrode 15 at one end.
, with electrode I6 connected to the other end, and electrode 1
5, the heat conductive plate 11 is connected to the electrode 1 via an insulating plate 17.
A heat sink 12 is connected to each of the electrodes 16 through an insulating plate 17, and the electrodes 16 are connected to a DC power source 14 by a lead wire so that the current can be applied.The DC power source 14 can be switched in the current direction. It is configured so that it can be converted into positive or negative.

To explain more specifically about the squeegee 5 incorporating the thermo module 9, as shown in FIG. The cooling element 10 and the heat sink 12 are arranged outside.

This heat sink 12 is equipped with fins (not shown) in order to efficiently dissipate heat, and the heat conductive plate work 2
increases in temperature, thereby heating the squeegee 5 and cooling the opposing heat sink 12.

On the other hand, when the energization of the electrode 15 is reversed, the heat conduction plate 11 is cooled and its temperature drops, and this dropped temperature cools the squeegee 5, and at the same time, the opposing heat sink 12 rises in temperature and radiates heat to the outside. can do.

In this case, the temperature of the squeegee 5 can be adjusted by detecting the temperature of the ink with the temperature sensor 13 and transmitting the detected temperature to the power source 14 to control the direction of the current. Through this adjustment, the temperature of the ink can be constantly maintained. It can be controlled appropriately.

Next, a method of screen printing using the screen printing apparatus 1 will be described.

When the outside temperature is low, the thermo module 9 is first activated to heat the heat conductive plates 11 of the squeegee 5 and the ink return plate 6, respectively, to warm the squeegee 5 and the ink return plate, and then ink is placed on the printing plate 3. The squeegee 5 is lowered to touch the printing plate 3. At this time, ink return 6
has risen and is at printing plate 3, Hf"I Ohm:1.

In this state, the squeegee 5 moves and reaches 1+L on the printing plate 3.
Pass the ink through the mark E1 pattern 3a on the printing plate j3.
At the time of printing E41 rest 8m, second printing A1 (, 5- E insertion force < I omitted 2- Squeegee 5+, il rises and leaves the printing plate 3, and at the same time, the ink return G descends and prints. Touch and move the surface of glJ plate 3 2. Collect the ink at a predetermined position on printing plate 3.

Sukiji 5 and A〉・Repetition j and 6 are 1 in one movement movement.
Repeat this printing process on the first printing material for the individual seal stamp body 8 by printing it one after another. 2- is possible.

In the above printing process a, the squeegee 5 and the ink return 61J7 are heated to an appropriate temperature by the thermo modules 1 and 9 installed on them, so the ink is heated at a temperature of 1 or 2. The viscosity of the ink can be maintained at an appropriate level β[, and the ink can be applied to the printing material in the direction of 1-glue-1 to produce clear printing in the direction of -1=, →j.

In addition, even in the case of type 1 printing 9 (printing mode), printing is performed by the method U of Hashira, which is the same as screen printing.

〔Effect of the invention〕

, the printing method of the second invention constitutes a part of the printing device 1.7
Use a thermomoji 7 on the squeegee and/or ink returner.
The ink placed on the printing plate is heated and cooled to adjust the viscosity of the ink to the appropriate level. Because it is held at a high temperature and printed from scratch, there is no smearing or blurring of the print due to variations in viscosity, and it is possible to always print clearly.

On the other hand, the printing apparatus of the present invention is equipped with a thermomodule on the squeegee and/or ink returner, and by controlling the thermomodule, the ink placed on the printing plate can be easily heated and cooled by 9 people. As a result, printing can be performed without considering the influence of outside temperature on the ink, and the prints obtained are extremely clear, and it is easy to attach the thermomojip to the squeegee and/or ink return. Since it is a car, the structure is multi-M.
It has many advantages in practical use, such as being able to provide a cooling function with a squeegee or a squeegee or an ink return machine.

[Brief explanation of the drawing]

Figure 1 is the mark of this invention! FIG. 2 is a perspective view of the main parts of an embodiment of a screen printing device equipped with a 6+1 device; FIG. FIG. 2 is an explanatory diagram for explaining a thermomodule used in the present invention. ■...Sufu 1. I-on printing device 2...Printing table 3...Printing plate 4...Frame member 3a...Printing baguille 5...Squeegee 6...Ink returner 8...Printing material 9... 11... Heat conduction plate 12... Heat dissipation plate Figure 2 Figure 2 Figure 3 Patent applicant Tomi 1) Nobu generation Rihito
Patent Attorney Kou 1) Zen Ko procedure (Hoshosho (method) Amended specification

Claims (2)

[Claims] (1) Heating and cooling are performed by changing the direction of the applied current to the squeegee for spreading and printing the printing ink set on the printing plate and/or the ink returner for scraping up the spread printing ink. A printing method characterized by installing a thermo module that can perform printing while maintaining a constant viscosity of printing ink on a printing plate. (2) A thermo module that can heat and cool by changing the direction of applied current is installed in the squeegee for spreading and printing printing ink and/or the ink returner for scraping up the spread printing ink. A printing device characterized in that it is installed.