WO2019194359A1

WO2019194359A1 - Printing pad and fixing means

Info

Publication number: WO2019194359A1
Application number: PCT/KR2018/006871
Authority: WO
Inventors: 안동준
Original assignee: 안동준
Priority date: 2018-04-04
Filing date: 2018-06-19
Publication date: 2019-10-10
Also published as: KR101866965B1

Abstract

The present invention relates to a printing pad and a fixing means for a pad printing device. A pad apparatus comprises: a body portion comprising a block-type pad body; a printing portion comprising an outer-surface centering guide and separably coupled below the body portion; and an air valve and a sealed negative pressure space formed between the coupled body and printing portion. The fixing means comprises a plate-type first fixing portion and a ring-type second fixing portion and presses and fixes an outer flange of a printing pad mounted on the first fixing portion. The present invention assures printing quality as well as increases economic efficiency and facilitates printing pad centering for precision by means of allowing the printing portion to be easily replaced when necessary. The printing pad can be stably fixed and maintained.

Description

Print pads and fixings

FIELD OF THE INVENTION The present invention relates to print pads and fixing means, and more particularly to print pads and fixing means used in pad printing equipment.

The printing facility is a pad printing facility for attaching a pattern using a pad and transferring it to an object according to a printing method, and a screen for spraying or ejecting ink onto a screen mask on which a specific pattern is formed to perform printing. Various forms, such as a printing installation, are proposed. In particular, pad printing facilities using pads are known to be suitable for the printing of products requiring mass production due to the advantage that printing is relatively quick and simple.

1 is a configuration diagram schematically showing the pad printing facility described above. Referring to the drawings, the pad printing equipment 1 is a case in which various configurations necessary for printing are incorporated, and a jig 2 and a jig 2 installed at the front of the case (left side in the drawing) to which a printing object is mounted. Corrosion substrate 3 formed with a printing pattern disposed on the rear side, and the ink cup (4) is provided to supply ink to the printing pattern of the corrosion substrate 3 and is installed to be forward and backward.

In addition, the installation 1 is a printing pad (5) of the 'U' type, 'V' type or similarly convex downward to substantially perform printing, the top of the jig (2) and the corrosion substrate ( It is installed to reciprocate the upper section of 3) up and down or back and forth, and is configured to adhere the ink supplied to the printing pattern on the corrosive substrate 3 to the surface and then perform transfer printing on the surface of the printing object. In this configuration, the print-pad 5 is made of a certain shape necessary for printing mainly using silicon having excellent transfer efficiency of ink, and is bonded to the base plate 7 with an adhesive such as silicone as a fixing means thereof. Is installed in the system (1).

Referring to FIG. 2, specifically, the ink pattern 6 on the corrosive substrate 3 is transferred to the pad 5 by the contact pressure of the print-pad 5 falling, and the pad 5 is lowered again. It is known that printing of the object A is performed by transferring the pattern 6 from the pad 5 while pressing the surface of (A). In this case, for complete transfer and transfer of the pattern 6, the print-pad 5 needs to be soft to a considerable extent.

However, as the so-called silicon pad 5 is softer, the curing proceeds at room temperature faster. Accordingly, when the same pad 5 is used continuously, the silicon pad 5 is repeatedly subjected to repeated contact with the pressure, the corrosion substrate, and the object during printing. The quality of printing is getting worse due to surface scratches and the degree of curing by elapsed time.

Thus, in the field, the print pad 5 is frequently replaced with a new one. As a matter of course, the part where the damage or deformation actually occurs will correspond to the end of the pad 5, but it is still economically significant to replace the entire pad 5. In particular, considering that the uninterrupted silicon that prevents the generation of static electricity is more than twice as expensive as ordinary silicon materials, it can be said that a special countermeasure against this problem is required.

On the other hand, the print-pad 5 is attached to the base plate 7, the back of which is a fixing means by silicon bonding, and is installed in the facility 1 with the fixing means, wherein the bonding of the print-pad 5 is performed. There is a problem that fixing is inconvenient but easy to separate, and this problem is doubled as the printing process and printing pressure are repeated. Furthermore, in this case, the printing pressure can finely deform the in-position and the shaping of the print-pad 5 (see, for example, the dashed line portion of FIG. 2, see laterally convex form), whereby the print-pad 5 The problem arises that the precision of centering and printing is compromised.

The present invention is proposed to solve the problems of the conventional pad shape or structure described above. It is an object of the present invention, by constructing the print-pad applied to the above-described pad printing equipment in two parts, by removably combining a relatively large body portion and a small scale printing portion:

Good system applicability;

Improve the economics of replacement while ensuring the quality of printing;

To maintain the print part stably during a print job;

It is to provide a separate print-pad.

Furthermore, it is to provide a separate print-pad which can guarantee the precision of printing by making it easy and accurate to print-pad which is replaced at any time in a quick cycle, in particular, the printing center.

It is another object of the present invention, regardless of the form, i.e., whether the two parts are integrated or detachable, to ensure that the print pad can be firmly and stably supported, and that the print pad can be held in position and It is an object of the present invention to provide a pad fixing means which does not vary in formability.

The print-pad of the present invention is based on a print-pad which is installed at the reciprocating portion of a pad printing facility and adheres the ink introduced to the print pattern of the corrosive substrate and press-transfers to the surface of the object to perform printing.

Here, the print-pad is:

A main body portion including a block pad body;

A block-type pad printing unit which is detachably fastened to a lower portion of the main body by a detachable structure and has a plurality of centering guides formed on an outer surface thereof;

A closed space formed between the fastened body and the printing unit, and a negative pressure space connected to the outside through an exhaust line through a passage formed through the body;

An air valve installed in the exhaust line to control the flow of air;

Including;

The negative pressure space is:

Exhausting by pressing the printing portion fastened to the body in a vertical direction or by connecting and operating a separate exhaust means to the air valve side to generate a negative pressure providing a coupling force between the body and the printing portion;

It is characterized by.

Preferably the air valve is an on / off valve or a check valve.

The detachable structure is a structure in which one end of the lower end of the body and the upper end of the printing unit is fitted and fixed to the other end. Specifically, it includes a crimping support protruding downward from the edge of the body, and a convex surface formed in the center of the upper end of the printing portion and fitted into the support. And in order to reinforce the fastening force of the detachable structure, the support may include one or more pressure projections protruding inward to press the side surface of the convex surface, preferably the projection is corresponding to the side slope of the convex surface It is a wedge-shaped protrusion that is interviewed.

On the other hand, in order to accurately set the position and direction of the printing portion at the time of fastening and fastening fastening, the body and the printing portion is inserted into contact with each other by the detachable structure, specifically, on the inner surface and the convex surface of the support Guide protrusions and grooves corresponding to each other are formed.

The negative pressure space is a space formed between the convex surface of the printing portion and the upper surface inside the support when the printing portion is fastened. At this time, in order to form the space sufficiently and to exhaust quickly, the inner upper surface of the support is designed to be concave and the passage is formed from the top of the concave space.

The fixing means of the present invention comprises means for mediating the print-pad to be installed in the reciprocating portion of the pad printing facility;

A plate-shaped first fixing portion having an inner concave surface,

A ring-shaped second fixing portion fastened to face an edge portion of the first fixing portion and having a through hole formed therein;

The print-pad protrudes while being fitted into the through hole with the rear surface seated on the recessed surface of the first fixing part,

Wherein the outward flange portion of the print-pad is pressed and fixed between the first and second fixing portions;

It is characterized by.

Preferably, the through hole of the second fixing part is configured to have an inclination angle in which the inner wall thereof narrows outward in correspondence with the tapered section. This inclination angle presses the corresponding outer taper section of the printing pad to reinforce the printing pad fixing force of the fixing means, while preventing the printing pad from extending laterally by the printing pressure (see FIG. 2). do.

In this fixing means, the print-pad may be applied without limitation, whether the main body-printing part is detachable or integral.

The print-pad of the present invention includes a pad main body connected to a reciprocating side of a pad printing facility by using a fixing means, and a printing part detachably fastened to a lower part of the main body to adhesively transfer ink onto a surface of the pad printing facility. It consists of a two-stage 'separable pad structure, and is configured such that the bonding force due to the physical bonding force and the negative pressure generated in itself is applied between the main body portion and the printing portion.

Thus, the print-pad is:

It can be firmly applied to pad printing equipment,

By simply replacing the flexible printing unit itself as necessary, leaving the main body portion of which the durability is maintained in the pad device, it is possible to ensure the quality of transfer printing and at the same time effectively improve the economics;

Negative pressure which provides a coupling force between the main body portion and the printing portion can be generated by a simple configuration and operation;

A printing unit is stably supported during a printing operation by the system;

There is an effect such as.

The print-pad further includes a plurality of centering guides formed on the outer surface of the printing portion. Thus, the printing-pads, which are replaced at any time by a fast cycle, in particular, can be easily and accurately printed centering operation of the printing portion, there is an effect that can ensure the accuracy of the printing.

On the other hand, the printing-pad fixing means of the present invention fixes the printing-pad by the method of pressing the fixing side flange portion while the first and second fixing portions protrude through the printing side ends of the printing-pad, Preferably the through hole and the print-pad contact in an inclined wedge shape. Therefore, the print pad can be firmly and stably fixed and supported, and the printing pad can be precisely realized by not changing the position and the formability of the print pad.

1 is a schematic configuration diagram of a conventional transfer printing system.

FIG. 2 is a view for explaining a printing operation in FIG. 1. FIG.

3 is a perspective view of a print-pad in accordance with the present invention.

4 is an exploded view of FIG. 3;

5 is a cross-sectional view taken along the line A-A of FIG.

6 is an exhaust action diagram of FIG. 3.

[Description of the code]

10. Print pad 40. Fixture

11.Main body 41.First fixing part

12. Gap 42. Indentation surface

13. Body 43. Second fixing part

14. Printing part 44. Through hole 44a.Inner surface

15. Air valve 45. Fine protrusion

16. Detachable structure 46. Facing part

17. Support θ. Tilt angle

18. Convex R. Round

19. Pressure projection

20. Guide protrusion

21. Home

22. Negative pressure space

23. Pathway

24. Exhaust Line

26. Vent hole

27. Centering Guide

28. Flange

29. Pressure gauge

Features and effects of the present invention 'print-pad' and 'fixing means' described or not described above will become more apparent through the following description of the embodiments described with reference to the accompanying drawings. In the drawings below, the print-pad of the present invention is indicated by reference numeral 10 and the print-pad fixing means of the present invention is indicated by reference numeral 40.

The print-pad 10 is based on a print-pad installed in the upper and lower reciprocating portions of the pad printing facility of FIG. 1 to adhere ink injected to the print pattern of the corrosive substrate and to press-transfer the ink onto the surface of the object to perform printing. It is done. Since the print pad 10 cannot be installed directly in the reciprocating part, the fixing means 40 mediates the print pad 10 in the reciprocating part of the transfer printing system.

Hereinafter, the print pad 10 will be described, and then the fixing means 40 will be described.

First, the print-pad 10 of the present invention is a pad printing portion detachably fastened to a lower portion of the body portion 11 and the main body portion 11 including the block-shaped pad body 13 An exhaust line including a passage 23 of the main body portion 11 to control the exhaust of the negative pressure space 22 in the print pad 10 includes a 14-type detachable pad structure, including 14. It further comprises an air valve (15) installed at the end of the (24).

The main body portion 11 includes a block-type pad body 13 suitable for being fixed to the fixing means 40 installed in the reciprocating portion of the facility. Here, the 'block-type' is sufficient to be understood as a concept corresponding to the so-called 'space-type', which is hollow, and this type is preferable in consideration of the durability against the vertical printing pressure and the bonding force of the printing unit 14, Therefore, the space type is excluded.

The printing unit 14 is detachably fastened by a detachable structure 16 to a lower portion of the pad body 13 of the main body 11, and a block-type pad printing unit having a plurality of centering guides 27 formed on an outer surface thereof. to be. In this embodiment, the detachable structure 16 is a structure in which one end of the lower end of the main body portion 11 and the upper end of the printing portion 14 is fitted in close contact with the other end and fixed. First of all, the centering guide 27 is a '-' or '+' type of protrusion, etched or matted, which corresponds to the mark on the corrosive substrate ('3' in FIG. 1), and the print-pad 10 When the printing unit 14 is pressed at the time of setting, the guide 27 checks the position of the guide 27 to be consistent with the marking on the substrate, thereby performing the centering operation, thereby enabling accurate and consistent printing.

Specifically, the detachable structure 16 is formed in the center of the upper end of the crimping support 17 and protruded downward from the edge of the body 13, the printing portion 14 inside the support 17 It includes a convex surface 18 to be fitted. In order to reinforce the fastening force of the detachable structure 16, the support 17 may include a pressure protrusion 19 protruding inward to press the side surface of the convex surface 18. 19 is a wedge-shaped protrusion that interviews the side slope of the convex surface 18 and may be provided in two or more stages as shown.

As will be described later, when the printing unit 14 is relatively soft, the pressure protrusion 19 may press in and press the side of the printing unit 14 even if the pressure protrusion 19 does not have a corresponding configuration. There will be.

On the other hand, the guide 13 corresponding to each other on the surface of the body 13 and the printing portion 14 is fitted to each other by the detachable structure 16, in particular the inner surface and the side surface of the convex surface 18 of the support 17. A large number of

grooves

20 and 21 are formed, and when the print unit 14 is fastened by these

guide configurations

20 and 21, the position and direction thereof can be accurately set and fastened quickly. To prevent it.

The pad printing portion 14 is fastened to the pad body 13 of the main body portion 11 by the detachable structure 16 and the reinforcing structure. At this time, the main body portion 11 is formed so that the round step (12) is extended compared to the outer edge of the printing portion 14, so that the printing portion 14 does not protrude from the main body portion 11 by pressing the printing portion ( 14) to prevent deformation such as push out. However, since the printing unit 14 is a portion directly performing transfer printing on an object, as well as its own weight and directly receiving a transfer pressure, there is a possibility that the printing unit 14 may be randomly separated from the main body 11 during a printing operation. do. Accordingly, the pad device 10 includes a negative pressure space 22 formed therein so that the physical coupling force between the body 13 and the printing unit 14 and the coupling force by the negative pressure complement each other.

In the present invention, the negative pressure space 22 is an enclosed space formed between the fastened body 13 and the printing unit 14, and an exhaust line passing through the passage 23 formed through the body 13 ( 24) is configured to be connected to the outside.

Specifically, the negative pressure space 22 is formed between the convex surface 18 of the printing portion 14 and the inner upper surface of the support 17 when the printing portion 14 is fastened to the main body portion 11. It is a space. In this case, in order to sufficiently form the negative pressure space 22 and to quickly exhaust the body 13, the inner surface of the support 17 is designed to be concave, and the passage 23 is formed from the top of the roof space. Is formed.

In the negative pressure space 22, internal air is discharged to the outside through the passage 23 and the exhaust line 24, so that negative pressure is generated therein. In order to prevent the print pad 10 of the present invention further includes an air valve 15 installed in the exhaust line 24 to control the flow of air.

In this embodiment, the exhaust line 24 extends from the passage 23 of the body 13 to the discharge hole 26 formed on one side of the fixing means 40, the air valve 15 is the exhaust line 24 It is attached to the end discharge hole 26 side of the). However, the arrangement design of the exhaust line 24 and the air valve 15 may be changed as necessary. In addition, although the air valve 15 is a non-return (non-return) check valve, a manual on / off valve or the like may be effectively applied. Reference numeral 29 is a pressure gauge for measuring the pressure value of the exhaust space.

In this embodiment, the main body portion 11 and the printing portion 14 are molded to be relatively hard and soft for durability against the printing pressure of the main body portion 11 and the transfer precision of the printing portion 14. It is. However, the present invention does not necessarily have a difference in hardness on both

configurations

13 and 14, and in another embodiment, both hardnesses are 1: 1.

The main body 11 is formed and integrally formed into the hard block shape so as to be firmly mounted to the fixing means 40 and the pad printing facility (for example, '1' in FIG. 1), as well as a lower portion. It is possible to firmly support the flexible printing portion 14 to be fastened to, it is possible to maintain the mold intact despite the printing and transfer pressure. This is also related to the case in which the body 13 and the printing portion 14 are block type, and if the body 13 and the printing portion 14 are so-called space type, deformation occurs severely in a job requiring a large transfer pressure. Therefore, it is regarded as not suitable for the transfer printing system.

On the other hand, since the printing portion 14 is a portion for performing transfer printing by adhering the ink pattern and pressing the ink pattern on the surface of the object, the printing portion 14 is molded to have a lower hardness than the main body portion 11. Accordingly, the print pad 10 of the present invention has a block-type body 13 formed of a material having a relatively high hardness so as to be installed on the reciprocating support side of the transfer printing system, and detachable from the lower portion of the body 13. It is possible to include a block-type printing portion 14 is formed of a material having a low hardness in order to be fastened, and to adhere the ink to the surface.

Preferably, at least the print portion 14 of the main body portion 11 and the print portion 14 is molded using an electroless silicon as a material. That is, the liquid silicone raw material is injected into the mold, and the mold is molded by maintaining a constant temperature and humidity and performing soft curing or hard curing for a predetermined time. Looking at the soft curing conditions for forming the printing portion 14, preferably, soft curing is performed by maintaining the temperature 15 ℃ ~ 25 ℃, humidity for 13 minutes to 130 minutes at a state of 13% to 17%. On the other hand, the hardening conditions for forming the body portion 11 is to increase the curing time to 46 hours to 50 hours in the same temperature and humidity conditions as described above and to increase the hardness of the hardening compared to the printing unit 14.

For example, in the soft curing, when the temperature is less than 15 ° C. and the humidity is more than 17%, it becomes difficult to solidify the silicon in a desired form, and when the temperature is more than 25 ° C. and the humidity is less than 13%, it is excessively hardened to make accurate printing difficult. In addition, when less than 110 minutes in terms of time it is difficult to maintain the solid form because the silicone is not cured, there is a problem that excessively cured when it exceeds 130 minutes.

On the other hand, in the hard curing, if the body 13 is not fully solidified to the extent necessary if less than 46 hours, there is a problem that loses the elasticity expected when printing work in the silicon itself by excessive curing when more than 50 hours . However, as long as it is relatively hard as compared with soft hardening, the condition does not need to be applied with difficulty. If necessary, the molded and cured main body portion 11 and the printing portion 14 may be supplied through natural curing for a suitable time at room temperature.

The print pad 10 configured as described above may be applied to a conventional pad printing facility (see FIG. 1) through the fixing means 40, and the print pad 10 may be a lower body of the main body 11. It is provided to reciprocate the upper section of the jig 2 and the upper section of the corrosive substrate 3 up and down or back and forth while the printing unit 14 is fastened to (13), and is supplied to the printing pattern on the corrosive substrate 3. After the ink is adhered to the surface of the printing unit 14, the transfer printing is performed on the surface of the printing object (A).

Referring to FIG. 6, at this time, the printing unit 14 uses the detachable structure 16 and the

guide structures

20 and 21, and the lower body 13 of the main body 11 already installed in the fixing means 40. (See arrow ①). Thereafter, the reciprocating portion of the facility is vertically lowered so that the printing portion 14 contacts the ground and is pressed at an appropriate pressure (see arrow ②), thereby ensuring the mutual fastening and at the same time the negative pressure space 22 is closed by the air valve 15. As it is exhausted to the outside through (see arrow ③), the space 22 is to generate a negative pressure providing a coupling force between the body 13 and the printing portion (14). Reference numeral 29 is a pressure gauge for the negative pressure space 22.

This exhaust action is possible by the material properties (press-restoration) of the body 13 and the printing portion 14, and, of course, if necessary, a separate exhaust means such as a vacuum pump on the air valve 15 side. (Not shown) may be connected and operated to allow exhaust. After the air valve 15 is turned off after the necessary exhaust is completed in any way, the body 13 and the printing unit 14 are firmly coupled to each other by the coupling force due to the physical coupling force and the negative pressure generated therein. In this way, the above print job is stably performed.

On the other hand, if such a printing operation is repeated, the quality of printing may be deteriorated gradually due to the transfer pressure repeatedly applied to the printing unit 14, the surface scratches due to the repeated contact with the corrosive substrate and the object, the curing duration at room temperature, and the like. It is. In this case, forcibly turning on the air valve 15 or a separate discharge valve causes external air to flow into the negative pressure space 22 and the negative pressure is discarded, so that the printing unit 14 can be easily removed from the main body 11. Can be. In other words, by simply replacing the printing portion 14 as necessary, leaving the main body portion 11 of the print-pad 10 as it is, it is possible to ensure the quality of printing and at the same time improve the economics.

Next, the fixing means 40 of the present invention is a means for mediating the print pad 10 to be installed at the upper and lower reciprocating portions of the pad printing equipment. In this embodiment, the main body for convenience is the print pad 10. Although the section 11 and the printing section 14 are detachable as described above, the fastening means 40 can be applied without limitation whether both

configurations

11 and 14 of the print-pad 10 are detachable or integral. It can be.

Specifically, the fixing means 40 is fastened to face the edge of the first fixing portion 41 and the plate-shaped first fixing portion 41, the inner recessed surface 42 is formed, the through hole (inside) A ring-shaped second fixing portion 43 is formed. Here, the print-pad 10 protrudes while being fitted into the through hole 44 with the rear surface of the main body portion 11 seated on the recessed surface 42, wherein the first and second heights are raised. The outward flange 28 portion of the body portion 11 side of the print-pad 10 disposed between the

top portions

41 and 43 is pressed and fixed at the edge facing portion 46 or its adjacent portion.

Preferably, by forming a plurality of concentric fine projections 45 on the concave surface 42 can prevent the flow during the back pressing of the print pad 10, and at the same time, print in the space between the projections 45 The pad 10 is sucked to form a vacuum. In addition, an exhaust line 24 is formed in the first fixing part 41 and connected to the passage 23, and the air valve 15 is disposed at an end discharge hole 26 of the exhaust line 24. Will be installed.

On the other hand, the through hole 44 of the second fixing part 43 has an inclination angle in which the inner surface 44a is narrowed outward in correspondence with the tape pad section of the print-pad 10, in particular, the main body portion 11 thereof. It is configured to have (θ). Accordingly, the inner surface 44a of the through hole 44 presses the corresponding outer taper section of the main body 11 to reinforce the fixing force of the print-pad 10 of the fixing means 40, and at the same time by the printing pressure. The print-pad 10 can be prevented from extending laterally (see FIG. 2).

If the print pad 10 extends laterally due to the printing pressure, the outer surface of the main body 11 of the silicon print pad 10 may be caught or torn by the upper edge of the through hole 44. Occurs. In order to prevent this, the upper end of the through hole 44 may be smoothly rounded.

Claims

In the print-pad for pad printing facilities,

A main body portion 11 including a block pad body;

A block-type pad printing unit 14 which is detachably fastened by a detachable structure 16 to a lower portion of the main body unit 11 and a body 13 and has a plurality of centering guides 27 formed on an outer surface thereof;

A negative pressure space connected to the outside through the exhaust line 24 through the passage 23 formed through the body 13 to the closed space formed between the fastened body 13 and the printing unit 14 (22);

An air valve 15 installed in the exhaust line 24 to control the flow of air;

Including;

The negative pressure space 22 is:

By pressing the printing portion 14 fastened to the body 13 in the vertical direction or by connecting and operating a separate exhaust means to the air valve 15 side, the body 13 and the printing portion 14 A negative pressure is created that provides hepatic cohesion;

Detachable print-pad, characterized in that.
The method of claim 1,

In order to be durable against the printing pressure of the body 13 and the transfer precision of the printing portion 14, the main body portion 11 and the printing portion 14 are separated, characterized in that molded in a relatively hard and soft Print-Pad.
The method of claim 1,

Separating print pads, characterized in that the main body portion 11 is formed so that the step (12) extended compared to the outer edge of the printing portion 14, so that the printing portion 14 does not protrude from the main body portion (11) .
The method of claim 1,

The centering guide 27 is a protrusion, an etched or matted mark, and when the printing unit 14 is pressed during the setting of the print-pad 10, it is confirmed that the guide 27 is aligned with the mark on the substrate. Separating print-pad, characterized in that to be able to do the centering operation.
The method of claim 1,

The detachable print pad (16) is characterized in that the one end of the lower end of the body (13) and the upper end of the printing portion 14 is fitted to the other end fixed structure.
The method of claim 4, wherein

The detachable structure 16 includes a crimping support 17 protruding downward from the edge of the body 13, and a convex surface formed at the center of the upper end of the printing unit 14 to fit inside the support 17. A removable print-pad, comprising (18).
The method of claim 6,

The support (17) is a removable print-pad, characterized in that the support includes a pressure projection (19) of one or more stages or two or more stages protruding inward to press the side of the convex surface (18).
The method of claim 7, wherein

Separable print-pad, characterized in that the pressure projection (19) is a wedge-shaped projection that interviews in response to the side slope of the convex surface (18).
The method of claim 1,

Separable printing, characterized in that a plurality of guide protrusions 20 and grooves 21 corresponding to each other are formed on both sides of the body 13 and the printing unit 14 is fitted to each other by the removable structure 16 in contact with each other -pad.
The method of claim 6,

The negative pressure space 22 is a separate type print, characterized in that the space formed between the convex surface 18 of the printing portion 14 and the upper surface inside the support 17 when the printing portion 14 is fastened. pad.
The method of claim 10,

The inner upper surface of the support (17) is designed to be concave to form a negative pressure space (22), wherein the passage (23) is formed from the top of the concave space.
The method according to claim 1 or 11, wherein

The exhaust line 24 extends from the passage 23 of the body 13 to the discharge hole 26 formed at one side of the fixing means 40, and the air valve 15 is disposed at the discharge hole 26 side. A detachable print-pad, characterized in that it is installed.
The method of claim 1,

Separating print-pad, characterized in that the air valve (15) is a check valve or on / off valve.
As a fixing means for mediating the print-pad to be installed at upper and lower reciprocating portions of the pad printing facility;

A plate-shaped first fixing portion 41 having an inner concave surface 42 formed therein;

A ring-shaped second fixing portion 43 fastened facing an edge of the first fixing portion 41 and having a through hole 44 formed therein;

The print-pad 10 protrudes while being inserted into the through hole 44 with its rear surface seated on the recessed surface 42 of the first fixing part 41,

At this time, between the first and the second fixing portion (41, 43), the outward flange portion 28 of the print pad 10 is fixed by pressing;

Fixing means characterized in that.
The method of claim 14,

The through hole 44 of the second fixing part 43 is configured such that the inner surface 44a has an inclination angle θ in which the inner surface 44a is narrowed outward in correspondence with the outer taper section of the print-pad 10. Characterized in that the fixing means.
The method of claim 14,

The through hole (44) is a fixing means, characterized in that the upper end is rounded (R) to protect the surface of the print-pad (10) is pressed under the printing pressure.
The method of claim 14,

A plurality of concentric fine protrusions 45 are formed on the concave surface 42 to prevent flow during the back pressing of the print-pad 10, and at the same time, the print-pad 10 in the space between the protrusions 45. Fixing means characterized in that the suction vacuum is formed.
The method of claim 14,

The print-pad (10) is the detachable print-pad of any one of claims 1-11;

An exhaust line 24 is formed in the first fixing part 41 and connected to the exhaust space 22 through the passage 23;

Fixing means characterized in that.