CN220349297U - Printing screen plate of unidirectional yarn - Google Patents

Abstract

A printing screen plate of unidirectional yarn comprises a screen frame and screen cloth. The net is arranged in the net frame and is composed of a plurality of yarn yarns. The yarns are not staggered with respect to each other and each of the yarns has substantially the same horizontal height where they correspond to each other.

Description

Printing screen plate of unidirectional yarn

Technical Field

The present disclosure relates to printing screens, and more particularly to a printing screen with unidirectional yarns.

Background

Screen printing is a technique of extruding ink through a mesh cloth by using a doctor blade pressure to print the ink on an object to be printed, and in the prior art, the mesh cloth is woven by using criss-cross yarns, as shown in a schematic diagram of a conventional printing screen 100 shown in fig. 1A. The printing screen 100 comprises a frame 110 and a web 120, wherein the web 120 is formed by interweaving a plurality of longitudinal yarns 1202 and a plurality of transverse yarns 1204, cutting the web into a desired size, and pressing the web with a material web 122 such as polyester fiber. Referring to FIG. 1B, FIG. 1B is a schematic illustration of a cross-section of the printing screen 100 of FIG. 1A along section line A-A'. As can be seen from fig. 1B, the longitudinal yarns 1202 and the transverse yarns 1204 are displaced and deformed at the crossing position due to the mutual up-down interlacing and pushing, so as to form a continuous curved shape. For example, the level defining the center plane of the web 120 is LH1, while the lengthwise yarns 1202a and 1202c are urged to displace to a higher level LH2 and the lengthwise yarn 1202b is urged to displace to a lower level LH3 as a result of interweaving with the crosswise yarns 1204. The thickness of the printed pattern also exhibits a high and low profile due to the high and low profile of the md yarns 1202 and cd yarns 1204.

In addition, in order to print highly fine graphics, a partial print area of the web is usually subjected to a doffing process. The de-screening process removes portions of the yarns (either machine direction yarns or cross direction yarns) to increase the ink permeability of portions of the printed areas of the web, such as the known printing screen 200 shown in fig. 2A. The printing screen 200 is, for example, a structure of the printing screen 100 subjected to a yarn removing process, and has a yarn removing region RZ. The crosswise yarns 1204 have been removed in the ravel area RZ, while only the lengthwise yarns 1202 (1202 a, 1202b, and 1202 c) remain. In order to achieve the tensile strength of the mesh cloth, the yarns in the printing area are generally made of metal, so that deformation caused by the knitting of the yarns in the initial process is still present even after the mesh cloth is removed, as shown in fig. 2B, which is a schematic cross-sectional view of the printing screen 200 according to the section line B-B' in fig. 2A. In fig. 2B, even though the web 120 is stripped, the lengthwise yarns 1202a and 1202c in the stripping zone RZ remain substantially at the higher level LH2 displaced by the crosswise yarns 1204 prior to stripping, and the lengthwise yarns 1202B remain substantially at the lower level LH3 displaced by the crosswise yarns 1204 prior to stripping.

In order to improve the deformation problem of the yarn, there is also known a printing screen plate which is used for manufacturing a mesh cloth by a jumper wire weaving method or enlarging the distance between adjacent yarns in a printing area of the mesh cloth.

Disclosure of Invention

As mentioned above, the interlacing method adopted in the prior art can deform the longitudinal yarns and the transverse yarns of the mesh at the interlaced mesh nodes, so that each yarn has asymmetric height. Even through the subsequent yarn removing process, the deformation state of the yarn can not be recovered, and the thickness of the printed pattern is uneven. In addition, the tension of the mesh cloth formed by interweaving is changed due to yarn removal, so that the alignment of the yarns is shifted, the size of the printed pattern is changed, and the printing fineness is not as expected. The range of the printing area is limited by the method of knitting with jumper wires or increasing the spacing between the wire yarns, and the mesh can be formed by knitting procedures, so that the manufacturing process has almost the same difference with that of a common printing screen.

The present utility model aims to provide a printing screen of unidirectional yarn to solve at least one of the above problems. The printing screen of the unidirectional yarn comprises a screen frame and screen cloth. The net is arranged in the net frame and is composed of a plurality of yarn yarns. The yarns are not staggered with respect to each other and each of the yarns has substantially the same horizontal height where they correspond to each other.

In one embodiment, the web is not subjected to a doffing treatment.

In one embodiment, each of the yarns is straight and unbent.

In one embodiment, the printing screen of the unidirectional yarn further comprises a film layer. The film layer is coated on the mesh cloth. The film layer includes a graphic opening for the passage of printing material.

In one embodiment, the printing screen of the unidirectional yarn further comprises a reinforcing structure. The reinforcement structure is arranged on the mesh cloth.

In one embodiment, the reinforcing structures are arranged vertically or diagonally to the yarns.

In one embodiment, the reinforcing structure is a polymer yarn.

Compared with the prior printing screen, the printing screen disclosed by the utility model gets rid of the complicated procedure that the previous mesh cloth has to be woven and manufactured, and has the advantages of thinner mesh cloth thickness and low cost of technology and materials due to the unidirectional yarn, and finer patterns can be printed without yarn removing treatment, so that the tension of the mesh cloth is maintained. The horizontal heights of the corresponding positions of the yarns in the printing screen are the same, so that the thickness of a printed pattern is easy to control, and the printing quality is more stable.

Drawings

Fig. 1A shows a schematic diagram of a conventional printing screen.

Fig. 1B shows a schematic side cross-sectional view of a known printing screen.

Fig. 2A shows a schematic diagram of a conventional printing screen.

Fig. 2B shows a schematic side cross-sectional view of a known printing screen.

Fig. 3A illustrates an architectural schematic diagram of a printing screen of some embodiments of the present disclosure.

Fig. 3B illustrates a schematic side cross-sectional view of a printing screen according to some embodiments of the present disclosure.

Fig. 4 illustrates an architectural schematic diagram of a printing screen of some embodiments of the present disclosure.

Fig. 5 illustrates an architectural schematic diagram of a printing screen of some embodiments of the present disclosure.

Fig. 6 illustrates an architectural schematic diagram of a printing screen of some embodiments of the present disclosure.

Fig. 7A illustrates a partial enlarged schematic view of a printing screen of some embodiments of the present disclosure.

Fig. 7B illustrates a partial enlarged schematic view of a printing screen of some embodiments of the present disclosure.

Fig. 8 illustrates an architectural schematic diagram of a printing screen of some embodiments of the present disclosure.

The reference numerals are as follows:

100. 200, 300, 400, 500, 600': printing screen

110. 310, screen frame

120. 320 mesh cloth

1202. 1202a, 1202b, 1202c md yarns

1204 Cross-machine direction yarns

122. 322 material net

3202. 3202', 3202a, 3202b, 3202c: yarn

324 inking region

330 film layer

332 graphic opening

340. 342 reinforcing structure

Section lines A-A ', B-B ', C-C '

C1, C1', C2', C3': correspondence

Level of LH1, LH2, LH3, LH4

RZ yarn removing zone

S1, first side

S2 second side

S3 third side

S4 fourth side

Detailed Description

The following examples are given in conjunction with the accompanying drawings, but the specific embodiments described are merely illustrative of the disclosure and are not intended to limit the disclosure to the order in which the operations of the structures may be performed, and any structures in which the elements may be rearranged to produce a device with equivalent efficacy are all intended to be encompassed by the disclosure. Directional terms, such as "upper", "lower", "left", "right", "horizontal", "longitudinal", "transverse", etc., as referred to in this disclosure are merely directions referring to the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding only and is not intended to be limiting of the disclosure. Furthermore, the drawings are only schematically illustrated and not drawn according to their true dimensions.

The words used throughout the specification and claims have the ordinary meaning of each word commonly used in the art, in the disclosure herein, and in the special context unless otherwise indicated. Certain terms used to describe the disclosure are discussed below, or elsewhere in this specification, to provide additional guidance to those skilled in the art in describing the disclosure.

Referring to fig. 3A, fig. 3A illustrates a schematic architecture of a printing screen 300 according to some embodiments of the disclosure. The printing screen 300 is composed of a screen frame 310 and a mesh cloth 320, and the mesh cloth 320 is, for example, a composite mesh, which is formed by stretching a plurality of wire yarns 3202 of metal material, pressing the wire yarns with a material mesh 322 of polyester fiber, and fixing the wire yarns to the screen frame 310. Wherein the individual thread yarns 3202 are not interlaced with each other. It should be appreciated that the yarns 3202 and the mesh 322 may be made of any suitable material according to practical needs, or in another embodiment, the mesh 320 may be a single mesh made of metal, for example, and the disclosure is not limited thereto. Referring to FIG. 3B, FIG. 3B shows a schematic side cross-sectional view of the printing screen 300 of FIG. 3A according to section line C-C'. Compared to the conventional two-way yarn printing screen (e.g., printing screen 200) with the yarn removing process, since the mesh fabric 320 of the printing screen 300 is not subjected to any yarn interlacing process, the yarn 3202 is not bent and is substantially straight because the yarn 3202 is not interlaced in one direction in the manufacturing process to the final state. Thus, in FIG. 3B, it can be seen that each of the wire yarns 3202 has a level of substantially LH4 at the corresponding correspondence with each other at section line C-C'. The horizontal height of each thread 3202 may be, for example, the height from the horizontal plane at the center of each thread 3202 when the printing screen 300 is placed on the horizontal plane, or may be, for example, the height from the lowest point (lower edge) or the highest point (upper edge) of each thread 3202. Furthermore, it should be understood that fig. 3B is only used for illustration, and that the actual product may have very small differences in the level of the corresponding portions of the yarns 3202, such as smaller than the diameter of the yarns 3202, at a microscopic level, due to the choice of materials or process equipment. Because the mesh 320 has only unidirectional non-interlaced yarns 3202, the fine patterns which can be printed after the yarns are removed from the conventional woven printing screen can be printed without a yarn removing process.

In the embodiment, the frame 310 is rectangular, as shown in fig. 3A, and may be divided into a first side S1, a second side S2, a third side S3 and a fourth side S4, which are sequentially adjacent, and the yarns 3202 may be parallel to the second side S2 or the fourth side S4 of the frame 310, for example. In another embodiment, the frame 310 may be any polygonal shape, and the yarns 3202 are parallel to one side of the frame 310. In yet another embodiment, the wire yarns of the frame may be disposed obliquely and not parallel to either side of the frame, as shown in fig. 4, which illustrates a schematic configuration of a printing screen 400 according to some embodiments of the present disclosure. The printing screen 400 is composed of a screen frame 310 and a mesh cloth 320, like the printing screen 300. The difference between the printing screen 400 and the printing screen 300 is that the mesh 320 of the printing screen 400 is formed by pressing the diagonally arranged yarns 3202' and the material mesh 322. In brief, in this embodiment, each of the yarns 3202' is not parallel to any of the first side S1, the second side S2, the third side S3, and the fourth side S4 of the frame 310.

Referring to fig. 5, fig. 5 illustrates a schematic architecture of a printing screen 500 according to some embodiments of the disclosure. The printing screen 500 is formed by a screen frame 310 and a mesh cloth 320, wherein the mesh cloth 320 is formed by stretching a plurality of thread yarns 3202 and pressing the thread yarns with a material mesh 322, and then fixing the thread yarns 3202 on the screen frame 310, and the thread yarns 3202 are not staggered. The screen cloth 320 of the printing screen 500 is further coated with a film layer 330, and the film layer 330 has a pattern opening 332 therein. Wherein the film 330 is used to shield the printing material (not shown) from passing through the mesh 320, and the pattern openings 332 are used to pass through the printing material, so that the printing material is further adhered to the printed object (not shown). In addition, the arrangement of the film 330 can also enhance the structural strength of the mesh 320, so that the yarns 3202 of the mesh 320 are not easy to deviate. Specifically, the film 330 is, for example, emulsion or polymer material, which is applied to the mesh 320 and cured, and then the pattern openings 332 are made by laser engraving or chemical etching. It should be understood that the shape, size, and number of the graphic openings 332 are adjusted based on the desired pattern to be printed and the present disclosure is not limited.

Referring to fig. 6, fig. 6 illustrates a schematic architecture of a printing screen 600 according to some embodiments of the disclosure. The printing screen 600 is formed by a screen frame 310 and a mesh cloth 320, wherein the mesh cloth 320 is formed by stretching a plurality of thread yarns 3202 and pressing the thread yarns with a material mesh 322, and then fixing the thread yarns 3202 on the screen frame 310, and the thread yarns 3202 are not staggered. The web 320 has a lower inking region 324 therein, the lower inking region 324 defining an area for printing a printed image. To strengthen the structural strength of the mesh cloth 320, the mesh cloth 320 of the printing screen 600 may be further provided with a reinforcing structure 340. The reinforcement structure 340 is made of a polymer material, for example, and can fix at least two or more yarns 3202, so as to prevent the yarns 3202 from being deviated due to the scraping pressure of the scraper during printing. In addition, the reinforcing structure 340 is disposed in the area other than the ink-down area 322 to avoid affecting the ink-penetrability during printing. It should be understood that, although two rectangular reinforcing structures 340 are shown in fig. 6, they are merely illustrative, and the shape, number and positions of the reinforcing structures 340 may be adjusted according to practical requirements, which is not a limitation of the present disclosure.

In one embodiment, the reinforcing structure 340 may be disposed perpendicular to the yarns, such as a partial enlarged schematic view of the mesh 320 provided with the reinforcing structure 340 according to some embodiments of the present disclosure as shown in fig. 7A. In fig. 7A, reinforcing structures 340 are vertically staggered with respect to yarns 3202a, 3202b, 3202c, respectively. In practical applications, the arrangement of the reinforcing structure 340 may cause some deformation of the yarns 3202a, 3202b, 3202C due to the thinner yarn diameter or softer material of the used yarns, as shown in the corresponding positions C1, C2, C3 of the overlapping yarns 3202a, 3202b, 3202C of the reinforcing structure 340 in fig. 7A. However, since the same reinforcing structure 340 is integrally disposed on one of the doctor or embossing sides of the mesh 320, the resulting yarns 3202a, 3202b, 3202c have the same deformation and deformation direction. In other words, the horizontal heights of the yarns 3202a, 3202b, 3202C are the same at the corresponding positions C1, C2, C3 where the yarns overlap the reinforcing structure 340.

In another embodiment, the reinforcing structure 340 may also be disposed obliquely and alternately with the yarn, such as a partial enlarged schematic view of the mesh 320 with the reinforcing structure 340 in some embodiments of the disclosure shown in fig. 7B. In fig. 7B, reinforcing structures 340 are diagonally interleaved with yarns 3202a, 3202B, 3202c, respectively. That is, the reinforcing structures 340 are staggered with respect to the yarns 3202a, 3202b, 3202c at non-perpendicular angles, respectively. In practical applications, the arrangement of the reinforcement structure 340 may cause some deformation of the yarns 3202a, 3202B, 3202C, but the deformation amount and the deformation direction of the yarns 3202a, 3202B, 3202C are the same as those of the corresponding portions C1', C2', C3' of the yarns 3202a, 3202B, 3202C of the reinforcement structure 340 in fig. 7B, because the same reinforcement structure 340 is integrally arranged on one side of the doctor or embossing surface of the mesh 320. In other words, the horizontal heights of the yarns 3202a, 3202b, 3202C are the same at the corresponding positions C1', C2', C3' where each of the yarns overlaps the reinforcing structure 340.

As can be seen from the above, even if the yarns 3202a, 3202b, 3202C are slightly deformed due to the arrangement of the reinforcing structure 340, the corresponding positions C1, C2, C3 (or C1', C2', C3 ') where the deformation occurs have the same horizontal height. Therefore, when the printing screen 600 is affected by the doctor pressure during the printing process, the force applied to each yarn is consistent, and the tension of the mesh cloth and the printing quality can be maintained stable. In addition, as described above, the reinforcing structure 340 is disposed outside the inking region, and the yarn portion in the inking region remains straight, i.e. the mesh cloth in the inking region remains flat and has no undulation, so that the fineness of the printed pattern is not affected by the reinforcing structure 340.

Referring next to fig. 8, fig. 8 illustrates a schematic architecture of a printing screen 600' according to some embodiments of the disclosure. The printing screen 600' has the same general structure as the printing screen 600, and is composed of a screen frame 310 and a mesh 320, wherein the mesh 320 is formed by stretching a plurality of threads 3202 and pressing the threads with a material mesh 322, and the threads 3202 are not staggered, and the description of the same structure is omitted herein. Unlike the printing screen 600, the reinforcing structure 342 of the printing screen 600' is a yarn pattern, such as a relatively high strength polymer yarn. The same reinforcing structure 340 is integrally disposed on one of the doctor or decal surfaces of the web 320 and is located outside the inking region 322. The reinforcing structures 342 may also be perpendicular or diagonally staggered with respect to the yarns 3202, and the number, positions and angles of arrangement may be adjusted according to practical requirements.

Although the embodiments of the present disclosure have been disclosed above, it should be understood that the present disclosure is not limited thereto, and that modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and the scope of the present disclosure is therefore intended to be limited only by the appended claims.

Claims (7)

1. A printing screen of unidirectional strands, comprising:

a screen frame; and

the mesh cloth is arranged in the mesh frame, wherein the mesh cloth is composed of a plurality of yarn yarns, the yarn yarns are not staggered, and the horizontal heights of the yarn yarns at the positions corresponding to each other are the same.

2. A printing screen of unidirectional yarns as claimed in claim 1, wherein the web is not subjected to a doffing treatment.

3. The printing screen of claim 1, wherein each of said plurality of yarns is straight and unbent.

4. The printing screen of unidirectional yarns of claim 1, further comprising:

a film layer coated on the mesh cloth, wherein the film layer comprises a pattern opening for the printing material to pass through.

5. The printing screen of unidirectional yarns of claim 1, further comprising:

the reinforcing structure is arranged on the mesh cloth.

6. The printing screen of claim 5, wherein the reinforcing structure is disposed in a perpendicular or oblique staggered arrangement with respect to a plurality of said yarns.

7. The printing screen of claim 5, wherein the reinforcing structure is a polymeric thread.