CN217649113U - Feed back sword and screen printing machine for screen printing machine - Google Patents
Feed back sword and screen printing machine for screen printing machine Download PDFInfo
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- CN217649113U CN217649113U CN202221193208.6U CN202221193208U CN217649113U CN 217649113 U CN217649113 U CN 217649113U CN 202221193208 U CN202221193208 U CN 202221193208U CN 217649113 U CN217649113 U CN 217649113U
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Abstract
The application belongs to the manufacturing field of photovoltaic cells, and particularly relates to a feed back knife for a screen printing machine and the screen printing machine. The feed back knife comprises a knife body and a knife handle; the cutter body comprises a working surface for collecting slurry; the cutter handle comprises a first end part used for being connected with the printer head, a second end part connected with the cutter body and a middle section for connecting the first end part and the second end part; the middle section is folded relative to the first end section in a direction away from the working surface, so that the working surface and the first end section are spaced apart in a direction perpendicular to the working surface. The feed back sword of this application is including the handle of a knife that has the interlude, and this handle of a knife increases the interval between working face and the scraper under the condition of not changing the structure of printing head. In the printing process, the slurry can not contact with the scraper and the return knife simultaneously, so that the slurry can roll between the scraper and the return knife, the rolling slurry can improve the condition of viscosity caused by local air drying and organic volatilization of the slurry, and the reject ratio of the product is reduced.
Description
Technical Field
The application belongs to the manufacturing field of photovoltaic cells, and particularly relates to a feed back knife for a screen printing machine and the screen printing machine.
Background
In the manufacture of solar cells, it is necessary to print the conductive paste onto the silicon wafer by screen printing. In the printing process, a scraper is moved from one end of a screen printing plate to the other end, and the slurry passes through meshes in the middle of the screen printing plate under the extrusion of the scraper and is printed on a printing stock; and then the scraper returns to the initial position, and the return knife returns the redundant sizing agent on the screen to the initial area.
During the printing process, due to the fact that the distance between the scraper and the return knife is short, the slurry is in contact with the scraper and the return knife at the same time, and the slurry is influenced to roll between the scraper and the return knife. The slurry which cannot roll is exposed in the air for a long time, and the conditions of local air drying, organic volatilization and the like are easy to occur, so that the viscosity of the slurry is increased. The slurry with high viscosity easily causes the problems of mesh blockage, grid line disconnection and the like, so that the reject ratio of products is high.
SUMMERY OF THE UTILITY MODEL
For solving because of thick liquids can not roll between scraper and feed back sword, arouse the thick consistency of thick liquids to uprise and lead to the higher problem of defective rate of product, this application provides a feed back sword for screen printing machine, and the interlude of this feed back sword can increase the interval of feed back sword and scraper under the condition that does not change the first structure of printing machine to satisfy the rolling demand of thick liquids between scraper and feed back sword, thereby reduce the defective rate of product.
According to an embodiment of the application, a first aspect provides a feed back knife for a screen printing machine, which comprises a knife body and a knife handle;
the blade body comprises a working surface for collecting slurry;
the knife handle comprises a first end part used for being connected with a printing machine head, a second end part used for being connected with the knife body and a middle section used for connecting the first end part and the second end part;
the middle section is folded relative to the first end section in a direction away from the working surface, so that the working surface and the first end section are distributed at intervals in a direction perpendicular to the working surface.
Furthermore, the knife handle is Z-shaped, the first end part and the second end part are both vertically arranged, and the middle section is obliquely arranged and linearly shaped; the included angles formed by the middle section and the first end part and the included angles formed by the middle section and the second end part are obtuse angles.
Furthermore, the feed back knife also comprises baffle plates arranged on two sides of the knife body; one end of the baffle is connected with the knife body, and the other end of the baffle protrudes out of the working surface.
Furthermore, the end part of the baffle plate protruding out of the working surface is chamfered with a round angle.
Further, the baffle is arc-shaped.
According to an embodiment of the present application, a second aspect provides a screen printing machine, including a printing head, and a scraper and a return knife connected to the printing head;
the feed back knife comprises a knife body and a knife handle;
the blade body is flat and comprises a working surface facing the scraper;
the knife handle comprises a first end part connected to the printer head, a second end part connected to the knife body and a middle section for connecting the first end part and the second end part;
the middle section is folded relative to the first end section in a direction away from the working surface, so that the working surface and the first end section are distributed at intervals in a direction perpendicular to the working surface.
Furthermore, the knife handle is Z-shaped, the first end part and the second end part are both vertically arranged, and the middle section is in a linear shape in an inclined arrangement; the included angles formed by the middle section and the first end part and the middle section and the second end part are obtuse angles.
Furthermore, the feed back knife also comprises baffle plates arranged on two sides of the knife body; one end of the baffle is connected with the knife body, and the other end of the baffle protrudes out of the working face.
Furthermore, the baffle is arc-shaped, and the end part of the baffle, which protrudes out of the working surface, is chamfered with a round angle.
Further, the printing machine head comprises a machine head body, a first knife rest and a second knife rest, wherein the first knife rest and the second knife rest are vertically arranged at the bottom of the machine head body;
the first end part is provided with an installation groove, and a bolt penetrates through the installation groove to fix the knife handle on the first knife rest; the scraper is fixed on the second tool rest.
The utility model provides a feed back sword is including the handle of a knife that has the interlude, this interlude make working face and first end have the interval in the direction of perpendicular to working face to under the condition that does not change the structure of printing head, increase the interval between working face and the scraper. In the printing process, thick liquids can not contact with scraper and feed back sword simultaneously for thick liquids can roll between scraper and feed back sword, and rolling thick liquids can improve because of the thick liquids local air-dry and the condition that the viscosity that organic volatilizees and lead to becomes high, and then reduce the risk that the mesh blockked up and the grid line disconnection, reduce the defective rate of product.
The screen printing machine of this application possesses the effect of aforementioned feed back sword.
Drawings
FIG. 1 is a schematic view of an assembly structure of a material returning knife and a scraper of the embodiment;
fig. 2 is a schematic structural view of the feed back knife in this embodiment.
In the figure, 10, the printer head; 11. a handpiece body; 12. a first tool holder; 13. a second tool holder; 20. a scraper; 30. a feed back knife; 31. a blade body; 311. a working surface; 32. a knife handle; 321. a first end portion; 322. second one an end portion; 323. a middle section; 324. mounting grooves; 33. and a baffle plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It should be noted that the illustration provided in the present embodiment is only to illustrate the basic idea of the present invention in a schematic way.
The structure, proportion, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions of the present invention, and any structural modification, proportion relation change or size adjustment should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention.
References in this specification to "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are for convenience only to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Because screen printing machine's scraper and feed back sword are all installed at the printing head, and the mounted position of scraper and feed back sword is fixed, consequently need increase the interval of scraper and feed back sword under the condition of the structure that does not change the printing head to satisfy thick liquids rolling demand between scraper and feed back sword, thereby reduce the defective rate of product.
In order to solve the above problem, the present embodiment provides a screen printing machine, and the screen printing machine is described below in detail.
As shown in fig. 1, the screen printing machine includes a printer head 10, a doctor blade 20, and a return blade 30. Specifically, as shown in fig. 2, the return knife 30 includes a knife body 31 and a knife handle 32. Blade 31 is preferably flat and includes a working surface 311 facing blade 20, where working surface 311 is used to gather the slurry. The handle 32 includes a first end 321 for connecting to the printer head 10, a second end 322 for connecting to the blade 31, and an intermediate section 323 for connecting the first end 321 and the second end 322.
In the present embodiment, the intermediate section 323 is folded with respect to the first end 321 in a direction away from the working surface 311, such that the working surface 311 is spaced apart from the first end 321 in a direction perpendicular to the working surface 311. It should be noted that, in this embodiment, the spacing distribution specifically means that the first end portion 321 and the working surface 311 have a distance in a direction perpendicular to the working surface 311.
The feed back knife 30 of this embodiment includes a handle 32 having an intermediate section 323 that allows the working surface 311 and the first end 321 to be spaced apart in a direction perpendicular to the working surface 311, thereby increasing the spacing between the working surface 311 and the doctor blade without changing the configuration of the printer head 10. In the printing process, the slurry can not contact with the scraper 20 and the feed back knife 30 simultaneously for the slurry can roll between the scraper 20 and the feed back knife 30, the rolling slurry can not only ensure that the printing is more uniform, but also can improve the condition of viscosity caused by local air drying and organic volatilization of the slurry, so that the printing quality is improved, and the reject ratio of the product is reduced.
In the present embodiment, the tool holder 32 is preferably in a "Z" shape, the first end 321 and the second end 322 are preferably vertically disposed, the middle section 323 is preferably in a linear shape obliquely disposed, and the included angles formed by the middle section 323 and the first end 321 and the included angles formed by the middle section 323 and the second end 322 are obtuse angles. The vertically arranged knife handle 32 is convenient to connect with the printing machine head 10, and the vertically arranged second end portion 322 is convenient to connect with the knife body 31, so that the second end portion 322 and the knife body 31 are both perpendicular to the printing surface screen printing plate. The configuration of the intermediate section 323 forming an obtuse angle with both the first end 321 and the second end 322 results in less consumable parts for the tool shank 32. It should be noted that an included angle between the intermediate section 323 and the first end 321 needs to be set according to actual requirements, which is not described herein again. In some embodiments, the middle section 323 can also be optionally shaped as a curve, a fold, or the like, such that the working surface 311 is spaced apart from the first end 321 in a direction perpendicular to the working surface 311.
In this embodiment, the material returning knife 30 further includes baffles 33 disposed on two sides of the knife body 31, one end of the baffle 33 is connected to the knife body 31, and the other end of the baffle 33 protrudes from the working surface 311. The baffle 33 can reduce the risk of slurry spilling from both sides of the blade 31. The baffle 33 of this embodiment is preferably arc for blade 31 and baffle 33 smooth transition can not form the dead angle, can avoid thick liquids to be detained in the dead angle, influences the mobility of thick liquids. The end of the baffle 33 protruding from the working surface 311 is chamfered to form a rounded corner, so that the outline of the end surface has no sharp corner, and the baffle 33 is prevented from damaging the screen printing plate in the moving process.
As shown in fig. 1, the printer head 10 of the present embodiment includes a head body 11, and a first blade holder 12 and a second blade holder 13 provided vertically at the bottom of the head body 11. An installation groove 324 is formed in the first end 321 of the tool holder 32, and a bolt is inserted into the installation groove 324 to fix the tool holder 32 to the first tool holder 12. The doctor blade 20 is fixed to the second blade holder 13.
It should be noted that, in the embodiment, the blade 31, the handle 32 and the baffle 33 are integrally formed, and the reclaiming cutter 30 is made of stainless steel, so that the cutter is wear-resistant, not easy to deform and long in service life.
All possible combinations of the technical features in the above embodiments may not be described for the sake of brevity, but should be considered as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A feed back knife for a screen printing machine comprises a knife body (31) and a knife handle (32); the method is characterized in that:
the blade body (31) comprises a working surface (311) for collecting slurry;
the tool shank (32) comprises a first end portion (321) for connecting a printing head (10), a second end portion (322) for connecting the tool body (31), and an intermediate portion (323) for connecting the first end portion (321) and the second end portion (322);
the intermediate section (323) is folded relative to the first end section (321) in a direction facing away from the working surface (311), such that the working surface (311) is spaced apart from the first end section (321) in a direction perpendicular to the working surface (311).
2. The feed back knife of claim 1, wherein: the knife handle (32) is Z-shaped, the first end portion (321) and the second end portion (322) are both vertically arranged, and the middle section (323) is linear and is obliquely arranged; the included angles formed by the middle section (323) and the first end part (321) and the included angles formed by the middle section (323) and the second end part (322) are obtuse angles.
3. The feed back knife of claim 2, wherein: the feed back knife (30) also comprises baffle plates (33) arranged on two sides of the knife body (31); one end of the baffle (33) is connected with the knife body (31), and the other end of the baffle (33) protrudes out of the working surface (311).
4. The feed back knife of claim 3, wherein: the end part of the baffle (33) protruding out of the working surface (311) is chamfered with a round angle.
5. The feed back knife of claim 4, wherein: the baffle (33) is arc-shaped.
6. A screen printing machine comprises a printing head (10) and a scraper (20) and a feed-back knife (30) which are connected with the printing head (10); the method is characterized in that:
the feed back knife (30) comprises a knife body (31) and a knife handle (32);
the blade body (31) is flat and comprises a working surface (311) facing the scraper (20);
the tool shank (32) comprises a first end (321) connected to the printer head (10), a second end (322) connected to the blade (31), and an intermediate section (323) for connecting the first end (321) and the second end (322);
the intermediate section (323) is folded relative to the first end section (321) in a direction facing away from the working surface (311), such that the working surface (311) is spaced apart from the first end section (321) in a direction perpendicular to the working surface (311).
7. The screen printing machine according to claim 6, wherein: the knife handle (32) is Z-shaped, the first end part (321) and the second end part (322) are both vertically arranged, and the middle section (323) is linear and is obliquely arranged; the included angles formed by the middle section (323) and the first end part (321) and the included angles formed by the middle section (323) and the second end part (322) are obtuse angles.
8. The screen printing machine according to claim 7, wherein: the feed back knife (30) also comprises baffle plates (33) arranged on two sides of the knife body (31); one end of the baffle (33) is connected with the knife body (31), and the other end of the baffle (33) protrudes out of the working surface (311).
9. The screen printing machine according to claim 8, wherein: the baffle (33) is arc-shaped, and the end part of the baffle (33) protruding out of the working surface (311) is chamfered with a round angle.
10. The screen printing machine according to claim 9, wherein: the printing machine head (10) comprises a machine head body (11), and a first knife rest (12) and a second knife rest (13) which are vertically arranged at the bottom of the machine head body (11);
a mounting groove (324) is formed in the first end portion (321), and a bolt penetrates through the mounting groove (324) to fix the knife handle (32) on the first knife rest (12); the scraper (20) is fixed on the second tool holder (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221193208.6U CN217649113U (en) | 2022-05-17 | 2022-05-17 | Feed back sword and screen printing machine for screen printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221193208.6U CN217649113U (en) | 2022-05-17 | 2022-05-17 | Feed back sword and screen printing machine for screen printing machine |
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| Publication Number | Publication Date |
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| CN217649113U true CN217649113U (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221193208.6U Active CN217649113U (en) | 2022-05-17 | 2022-05-17 | Feed back sword and screen printing machine for screen printing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116215060A (en) * | 2023-04-11 | 2023-06-06 | 江苏广谦电子有限公司 | PCB circuit board screen printing machine |
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2022
- 2022-05-17 CN CN202221193208.6U patent/CN217649113U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116215060A (en) * | 2023-04-11 | 2023-06-06 | 江苏广谦电子有限公司 | PCB circuit board screen printing machine |
| CN116215060B (en) * | 2023-04-11 | 2023-09-26 | 江苏广谦电子有限公司 | PCB circuit board screen printing machine |
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