CN105751687B - Slot scraper structure - Google Patents

Abstract

The slit scraper structure of the present invention comprises: a main body, having an inner side, which comprises: a groove; a first coupling portion adjacent to one side of the groove; a slit portion adjacent to the other side of the groove, wherein the first coupling portion protrudes from the plane of the slit portion; and a first scraper portion adjacent to one side of the slit portion; a cover body, having an inner side, which comprises: a plate body; and a second coupling portion adjacent to one side of the plate body, the second coupling portion being connected to the first coupling portion; a second scraper portion adjacent to the other side of the plate body, the position of the second scraper portion corresponding to the first scraper portion; an air pressure through hole arranged on the main body and connected to the groove, for connecting an air pressure connector to input air pressure; and a side cover unit, which is combined and connected to the side edges of the main body and the cover body, for forming an ink storage space between the plate body and the groove, and forming an ink outlet slit between the slit portion and the plate body.

Description

Slot scraper structure

technical field

The present invention relates to a scraper structure, in particular to a slit-type scraper structure, which has an ink storage space combined with a scraper, and uses air pressure as a power to push ink, so that ink can be discharged through an ink outlet slit, In order to achieve the effect of direct ink supply.

Background technique

Modern times pay more and more attention to environmental protection and lightness. Reducing the use of paper is the common goal of the world to prevent global warming. In recent years, the electronics industry has applied many printing technologies to manufacture electronic products, such as manufacturing electronic components with printing technology, printing circuits on circuit boards, or performing the step of coating ink or paste in the bonding process. Among numerous printing technologies, screen printing (Screen Printing) technology has been widely used in the surface processing of various items.

In the existing screen printing process, the ink part is mostly ink on the screen cloth first, and then evenly cover the area to be printed with the ink return knife. This process is called ink flooding. Then adjust the appropriate distance from the plate and cooperate with the appropriate squeegee angle of attack, speed, and downforce to carry out screen printing.

In order to complete the graphic transfer, the scraper and the screen plate need to form an attack angle, and this angle establishes the downward component and the force of the ink past roll, so that the ink can use these two forces to generate ink filling action , and then the ink is attached to the substrate by the sharp end of the scraper

However, the problems of the existing squeegee technology include: it is difficult to control the printing pressure, and it is often necessary to adjust printing parameters such as squeegee angle, squeegee printing speed, and distance from the plate according to different ink viscosities, mesh densities, and printing resolutions. The other is that the angle of attack (Attack) is not stable. When the printing conditions must increase the amount of down pressure, the softer squeegee will be deformed, and part of the pressure will be absorbed by the deformation of the squeegee, which will affect the angle of attack and make the printing more unstable. Stablize. Finally, the solvent-based ink will increase the surface area of the ink in contact with the air while covering the ink, which will accelerate the volatilization of the ink solvent, making the ink more viscous and more difficult to print.

Therefore, it is necessary to provide a scraper structure capable of solving the aforementioned problems.

Contents of the invention

The object of the present invention is to provide a slit-type scraper structure, which combines the ink storage space with the arc-shaped scraper, and uses air pressure as the power to push the ink, so that the ink can be discharged through an ink outlet slit. It achieves the effect of direct ink supply, thereby isolating the direct contact between ink and air, so that the ink is not easy to volatilize and dry up quickly during the screen printing process. In addition, the gap between the ink outlet slit of the scraper is excellent for fine line printing. The special design of the curved shape of the squeegee allows the mesh to be completely covered, so the actual printing process will not cause deformation of the squeegee and affect the angle of attack and other factors, making the printing more stable.

The slit scraper structure of the present invention is suitable for screen printing, including: a body with an inner side, which includes: a groove; a first joint portion adjacent to one side of the groove; a slit portion adjacent to the other side of the groove, wherein the first The joint portion protrudes from the plane of the slit portion; and the first scraper portion is adjacent to one side of the slit portion; the cover has an inner side including: a plate body portion; and the second joint portion is adjacent to one side of the plate body portion, The second joint part is connected to the first joint part; the second scraper part is adjacent to the other side of the plate body, and the position of the second scraper part corresponds to the first scraper part; the air pressure through hole is arranged on the body and communicated with the groove, It is used to connect the air pressure connector to input air pressure; and the side cover unit is combined and connected to the side of the body and the cover to form an ink storage space between the plate body and the groove, and to make the slit part and the plate body An ink outlet slit is formed between the parts.

The slit-type scraper structure of the present invention combines the ink storage space with the arc-shaped first and second scraper parts. Therefore, even if ink seeps out in the thin line printing part, the arc-shaped scraper can still The action of scraping printing not only saves the action of ink return in the process, but also makes the line diameter presented in the thin line printing part more fine.

In addition, the present invention is designed by the ink storage tank, which prevents the ink from being exposed to the air and speeds up the volatilization of the solvent. And the present invention combines the ink storage tank with the scraper to isolate the air to prevent the ink from volatilizing. Then, the air pressure is used as the driving force, so that the ink can be borrowed through the ink outlet slit, so as to achieve the effect of direct ink supply and direct transfer of graphics.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is a combined perspective schematic diagram of a slit scraper structure according to an embodiment of the present invention;

Fig. 2 is an exploded perspective view of a slit extrusion scraper structure according to an embodiment of the present invention;

Fig. 3 is a schematic perspective view of a combination of a body and a cover according to an embodiment of the present invention;

4 is a schematic cross-sectional view of a slit extrusion scraper structure according to an embodiment of the present invention;

5 is a schematic cross-sectional view of a slit scraper structure according to another embodiment of the present invention;

Fig. 6 is a schematic cross-sectional view of a slit scraper structure according to another embodiment of the present invention;

Fig. 7 is a schematic cross-sectional view of a slit scraper structure according to yet another embodiment of the present invention.

Among them, reference signs

1 Slot scraper structure

10 Body

11 First junction

12 grooves

13 Slit

15 First scraper unit

15a, 15b First scraping surface

20 cover

21 board body

212 Second junction

25 Second scraper part

25a, 25b Second scraping surface

30 Ink storage space

31 Ink outlet slit

32 strip gap

35 side cover unit

35a First side cover

35b Second side cover

40 Air pressure through hole

41 Air connection

50 airbags

60 Slit width adjustment spacer

70 screen printing

W width

W1 vertical distance

W2 thickness

Detailed ways

In order to make the above-mentioned and other purposes, features, and advantages of the present invention more obvious, the following will be described in detail in conjunction with the accompanying drawings:

Fig. 1 is a combined perspective view of a slit-type scraper structure according to an embodiment of the present invention, Fig. 2 is an exploded perspective view of a slit extrusion-type scraper structure according to an embodiment of the present invention, Fig. 3 is according to an implementation of the present invention Figure 4 is a schematic cross-sectional view of a structure of a slit extrusion scraper according to an embodiment of the present invention. The slit doctor blade structure 1 of the present invention is applicable to screen printing 70 , but is not limited thereto. Please refer to FIG. 1 to FIG. 4 , the slit scraper structure 1 includes: a body 10 and a cover 20 . The inside of the body 10 has a groove 12 , a first joint portion 11 adjacent to one side of the groove 12 , and a slit portion 13 adjacent to the other side of the groove 12 , and one side of the slit portion 13 is adjacent to the first scraper portion 15 . That is to say, one side of the slit portion 13 is adjacent to the first scraper portion 15 , and the other side of the slit portion 13 is adjacent to the groove 12 . The first combining portion 11 and the slit portion 13 can be integrally formed of the same material (such as metal). The first scraper portion 15 can be made of polymer material.

Please refer to Fig. 4 again, the above-mentioned first joint portion 11 and the slit portion 13 have a plane, there is a vertical distance W1 between the plane of the first joint portion 11 and the plane of the slit portion 13, and the plane of the first joint portion 11 It is higher than the plane of the slit portion 13 , that is, the first combining portion 11 protrudes from the plane of the slit portion 13 .

The cover body 20 is combined with the body 10, and the inside of the cover body 20 has a plate body part 21 and a second joint part 212, one side of the plate body part 21 is adjacent to the second joint part 212, and the other side of the plate body part 21 is adjacent to the second scraper part 25 , wherein the second joint part 212 is combined to connect the first joint part 11 , and the position of the second scraper part 25 corresponds to the position of the first scraper part 15 . The plate body portion 21 and the second connecting portion 212 can also be integrally formed from the same material (such as metal). The second scraper portion 25 can also be made of polymer material.

As mentioned above, in one embodiment, the first scraper part 15 has a first scraping surface 15a, the first scraping surface 15a is an arc-shaped surface, and the second scraper part 25 has a second scraper corresponding to the first scraping surface 15a. The scraping surface 25a, the second scraping surface is an arc surface. And the combination of the first scraping surface 15a and the second scraping surface 25a has a semicircular arc surface.

In addition, the main body 10 is provided with an air pressure through hole 40, which communicates with the groove 12, and is used to connect the air pressure connector 41 to input air pressure, so that the ink stored in the ink storage space 30 can be pushed out by the air pressure, so the pressure of the air pressure The value mainly corresponds to the viscosity of the ink. For example, high-viscosity ink must be driven by high-pressure air pressure, while low-viscosity ink must be driven by low-pressure air pressure, so as to control the proper output of ink.

Please refer to Fig. 3 and Fig. 4 again, the slit scraper structure 1 further comprises a side cover unit 35, which is combined and connected to the sides of the body 10 and the cover body 20, in detail, the side cover unit 35 comprises first and second The side covers 35a, 35b are combined and connected to the two sides of the main body 10 and the cover body 20 respectively, whereby the ink storage space 30 is formed between the side cover unit 35, the plate body portion 21 and the groove 12, and the side cover unit 35, An ink outlet slit 31 is formed between the slit portion 13 and the plate body portion 21 . In this embodiment, the side cover unit 35 can lock the body 10 and the cover 20 together by screws (not shown), so as to complete the combination of the slit scraper structure 1 .

As mentioned above, in one embodiment, the board body part 21 can have another groove (not shown in the figure), which corresponds to the groove 12, when the first joint part 11 and the second joint part 212 are combined and connected, the groove A larger ink storage space 30 will be formed with another groove.

In the above, because the first joint part 11 is protruding from the plane of the slit part 13, that is to say, the plane of the first joint part 11 is higher than the plane of the slit part 13, so when the first joint part 11 and the second joint part 212 combined connection, the slit part 13 will form the ink outlet slit 31, when the ink is filled in the ink storage space, the ink storage space is a closed space at this time, and the ink will be pushed by the air pressure and pass through the ink outlet The ink is output through the slit 31.

In addition, one side of the above-mentioned slit portion 13 is adjacent to the first scraper portion 15, and the first scraper portion 15 corresponds to the second scraper portion 25, so when the first joint portion 11 and the second joint portion 212 are combined and connected, the first The scraper portion 15 and the second scraper portion 25 are located at the ink outlet of the ink outlet slit 31 . Moreover, a strip-shaped gap 32 is formed between the second scraper portion 25 and the first scraper portion 15 , which communicates with the ink outlet slit 31 .

Please refer to Fig. 5, Fig. 5 is a schematic cross-sectional view of a slit scraper structure according to another embodiment of the present invention. The part is that the first scraper part 15 has a first scraping surface 15b, the first scraping surface 15b is a slope, the second scraper part 25 has a second scraping surface 25b corresponding to the first scraping surface 15b, and the second scraping surface 25b corresponds to the first scraping surface 15b. The second scraping surface 25b is an inclined plane. The combination of the first squeegee surface 15b and the second squeegee surface 25b forms an inverted triangular surface.

Fig. 6 is a schematic cross-sectional view of a slit scraper structure according to yet another embodiment of the present invention. In yet another embodiment, the present invention can further arrange an air bag 50 in the ink storage space 30 . Please refer to FIG. 5 , the slit scraper structure further includes an air bag 50 disposed in the ink storage space 30 , and the air bag 50 communicates with the air pressure hole 40 for inflating after receiving air pressure.

As mentioned above, when the concentration of the ink is high or the ink is thick, it is necessary to increase the air pressure to push the ink, and there may be uneven pressure. Therefore, the air pressure is output to the air bag 50, and the air bag 50 is inflated to apply pressure on the ink evenly, so that the ink can be evenly output.

Fig. 7 is a schematic cross-sectional view of a slit scraper structure according to yet another embodiment of the present invention. In addition, in yet another embodiment, in order to adjust the amount of ink output, the width W of the ink outlet slit 31 can be increased, so a slit width adjustment gasket 60 can be included between the second joint part and the first joint part, and the slit width The width adjusting pad 60 has a thickness W2. When the slit width adjusting pad 60 is arranged between the second joint part 212 and the first joint part 11, the width W of the ink outlet slit 31 will be widened, so it can be The width W of the ink outlet slit 31 can be freely increased.

As described above, the adjustment of the width of the ink outlet slit 31 is not limited thereto. In another embodiment, the second joint part 212 may protrude from the plane of the board body part 21, that is, there is a vertical distance between the plane of the second joint part 212 and the plane of the board body part 21 and protrude out of the board body The portion 21 forms a step, and the width of the ink outlet slit 31 can be increased by using this step.

The present invention provides a slit-type scraper structure, which combines the ink storage space with the scraper part, and uses air pressure as the driving force to enable the ink to flow out through the ink outlet slit to achieve the effect of direct ink supply. In addition, in the prior art, in the screen printing process, the ink is first applied to the screen cloth and then the printing process is performed. This action exposes the ink to the air and accelerates the volatilization of the solvent. The present invention combines the ink storage space with the scraper part, not only the ink storage space can isolate the air to prevent the ink from volatilizing, but also does not need the ink return knife, which can save the action of ink return in the process.

In addition, in the part where the thin line is printed, the scraper head (the combination of the first scraper part 15 and the second scraper part 25) has a semi-circular arc cross-sectional design, even if ink seeps out, scraping can still be performed on the arc-shaped part The action makes the wire diameter presented in the thin line printing part more fine.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (9)

1. A slit type scraper structure, suitable for screen printing, is characterized in that, comprising: A body having an inner side including: a groove; a first joint adjacent to one side of the groove; and a slit portion adjacent to the other side of the groove, wherein the first joint portion protrudes from the plane of the slit portion; a first scraper portion adjacent to one side of the slit portion; A cover body has an inner side including: a plate body; and a second joint portion adjacent to one side of the plate body, the second joint portion is connected to the first joint portion; a second scraper part, adjacent to the other side of the plate body part, the position of the second scraper part corresponds to the first scraper part; An air pressure through hole is arranged on the body and communicates with the groove, and is used to connect an air pressure connector to input an air pressure; and One side cover unit is combined and connected to the side of the body and the cover, so as to form an ink storage space between the plate body and the groove, and to make the gap between the slit and the plate body Form an ink outlet slit; A slit width adjusting gasket is located between the second joint part and the first joint part, and is used for adjusting the width of the ink outlet slit. 2. A slit-type scraper structure, suitable for screen printing, characterized in that it comprises: A body having an inner side including: a groove; a first joint adjacent to one side of the groove; and a slit portion adjacent to the other side of the groove, wherein the first joint portion protrudes from the plane of the slit portion; a first scraper portion adjacent to one side of the slit portion; A cover body has an inner side including: a plate body; and a second joint portion adjacent to one side of the plate body, the second joint portion is connected to the first joint portion; a second scraper part, adjacent to the other side of the plate body part, the position of the second scraper part corresponds to the first scraper part; An air pressure through hole is arranged on the body and communicates with the groove, and is used to connect an air pressure connector to input an air pressure; and One side cover unit is combined and connected to the side of the body and the cover, so as to form an ink storage space between the plate body and the groove, and to make the gap between the slit and the plate body Form an ink outlet slit; Wherein, the second combining portion protrudes from the plate body and is used for adjusting the width of the ink outlet slit. 3. The slit scraper structure according to claim 1 or 2, wherein the first scraper portion has a first scraping surface, the first scraping surface is an arc surface, and the second scraper portion There is a second scraping printing surface corresponding to the first scraping printing surface, and the second scraping printing surface is an arc surface. 4. The slit scraper structure according to claim 1 or 2, wherein the first scraper portion has a first scraping surface, the first scraping surface is a slope, and the second scraper portion has a corresponding On a second scraping printing surface of the first scraping printing surface, the second scraping printing surface is an inclined plane. 5. The slit-type scraper structure according to claim 1 or 2, further comprising an air bag, which is arranged in the ink storage space, and the air bag communicates with the air pressure through hole for receiving the air pressure and swell. 6. The slit doctor blade structure according to claim 1 or 2, further comprising: an ink, which is used to store in the ink storage space, and is pushed by the air pressure and passed through the ink outlet slit slit to output the ink. 7. The slit doctor blade structure according to claim 6, wherein the ink storage space storing the ink is a closed space. 8. The slit scraper structure according to claim 1 or 2, wherein the first scraper portion and the second scraper portion are located at the output ink of the ink outlet slit. 9 . The slit-type scraper structure according to claim 8 , wherein a strip-shaped gap is formed between the second scraper portion and the first scraper portion, which communicates with the ink outlet slit. 10 .