CN220995809U - Scraper assembly - Google Patents

Abstract

The application provides a scraper component, which relates to the field of photovoltaics and comprises: a knife rest and a scraper; the knife rest is positioned above the scraper and connected with the scraper; the scraper is integrally formed and comprises an arc-shaped section and a straight-shaped section, the arc-shaped section is smoothly connected with the straight-shaped section, the contact area of the scraper, slurry and a screen plate can be increased by the arc-shaped section, the slurry can be pressed into meshes of the screen plate by the straight-shaped section, the printing ink permeability is ensured, the thin grid line is prevented from breaking, the shape of the integrally formed scraper is regular, the thickness is uniform, and the action during screen printing can be smoother; the overflow preventing part can prevent the printing paste from overflowing, the sheath can prevent the screen plate from being damaged when scraping the material and returning the material, and the sheath can be arranged to be detachable, so that the cleaning and the replacement are convenient.

Description

Scraper assembly

Technical Field

The present utility model relates to the field of photovoltaics, and more particularly to a doctor blade assembly.

Background

Along with the development of the photovoltaic manufacturing industry, the printing of fine grid lines on the battery piece is required to be higher and higher, the fine grid is thinner and thinner, the contact surface of the scraper and the screen plate is in line contact in the prior art, and the paste is incompletely printed during printing, so that grid breakage is easy to occur.

Therefore, how to overcome the above-mentioned problems is one of the technical problems to be solved in the present stage.

Disclosure of utility model

In view of the above, the utility model provides a scraper assembly, which increases the contact area between the scraper and the slurry and the screen plate and avoids the problem of grid breakage of the fine grid line by designing the scraper to be a straight section and an arc section.

The present application provides a doctor assembly comprising: a knife rest and a scraper; the knife rest is positioned above the scraper and connected with the scraper; the scraper is integrally formed and comprises an arc-shaped section and a straight section, and the arc-shaped section is smoothly connected with the straight section.

Optionally, wherein: the arc-shaped section comprises a first top surface and a first bottom surface, the straight section comprises a second top surface and a second bottom surface, the first top surface is parallel to the first bottom surface, and the second top surface is parallel to the second bottom surface.

Optionally, wherein: the first top surface is connected with the second top surface, and the first bottom surface is connected with the second bottom surface.

Optionally, wherein: the first top surface is far away from the one end of second top surface is higher than first top surface with the one end that the second top surface links to each other, the first bottom surface is kept away from the one end of second bottom surface is higher than first bottom surface with the one end that the second bottom surface links to each other.

Optionally, wherein: and an included angle alpha is formed between the tangent plane of the first bottom surface, which is close to the second bottom surface, and the plane where the second bottom surface is located, wherein alpha is more than 0 and less than or equal to 30 degrees.

Optionally, wherein: still include the anti-overflow portion, the anti-overflow portion includes first anti-overflow portion and second anti-overflow portion, first anti-overflow portion with second anti-overflow portion symmetry set up in the both sides of knife rest, and with knife rest fixed connection, first anti-overflow portion with second anti-overflow portion is for the curved plate that contains the concave surface, the concave surface is located the curved plate is towards one side of knife rest.

Optionally, wherein: one end of the first overflow preventing part, which is close to the plane of the second bottom surface, is 1-3mm higher than the plane of the second bottom surface; one end of the second overflow prevention part, which is close to the plane of the second bottom surface, is 1-3mm higher than the plane of the second bottom surface.

Optionally, wherein: the anti-overflow part further comprises a sheath, and the sheath is positioned on one side, close to the scraper, of the first anti-overflow part and the second anti-overflow part.

Optionally, wherein: one end of the sheath, which is close to the second bottom surface, is lower than one end of the first overflow prevention part and the second overflow prevention part, which are close to the second bottom surface, and is flush with the plane where the second bottom surface is located.

Optionally, wherein: the sheath is made of natural rubber or synthetic rubber.

Compared with the prior art, the scraper component provided by the utility model has the following beneficial effects: the scraper component is designed into a straight section and an arc section, the arc section can increase the contact area of the scraper, the slurry and the screen plate, the straight section can press the slurry into the mesh holes of the screen plate, the ink permeability of printing is ensured, and the phenomenon of grid breakage of a fine grid line is avoided.

Of course, it is not necessary for any one product embodying the utility model to achieve all of the technical effects described above at the same time.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

FIG. 1 illustrates a front view of a doctor assembly according to an embodiment of the utility model;

FIG. 2 illustrates a side view of a doctor assembly according to an embodiment of the utility model;

FIG. 3 is a left side view of a doctor blade construction according to the present utility model;

FIG. 4 is a schematic view showing the angles of the plane of the arc bottom surface and the straight bottom surface of the scraper according to the embodiment of the present utility model;

Fig. 5 is a perspective view of a doctor assembly according to an embodiment of the utility model.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Fig. 1 is a front view of a doctor assembly according to an embodiment of the present utility model, fig. 2 is a side view of a doctor assembly according to an embodiment of the present utility model, referring to fig. 1 and 2, a doctor assembly 00 according to an embodiment of the present utility model includes: a knife rest 1 and a scraper 01; the knife rest 1 is positioned above the scraper 01 and is connected with the scraper 01; the scraper 01 is formed integrally and comprises an arc-shaped section 3 and a straight section 2, and the arc-shaped section 3 is smoothly connected with the straight section 2. Specifically, the utility model provides an integrally formed scraper assembly 00, the scraper assembly 00 comprises a knife rest 1 and a scraper 01, an arrow in fig. 2 shows the advancing direction of the scraper 01, wherein the knife rest 1 is positioned above the scraper 01 and is fixedly connected with the scraper 01, the scraper 01 comprises a straight section 2 and an arc section 3, the arc section 3 is positioned in front of the straight section 2 in the advancing direction of the scraper 01, namely, the arc section 3 firstly contacts with a printing screen plate to enlarge the printing area, the straight section 2 is stamped to ensure the printing ink permeability, and the joint of the straight section 2 and the arc section 3 is smoothly transited, so that when screen printing is carried out, the knife rest 1 drives the scraper 01 to print and stamp the paste on the screen plate on a battery plate, the arc section 3 positioned at the front end of the straight section 2 can enlarge the contact area between the scraper 01 and the paste and the screen plate, and the mesh section 2 positioned at the rear end of the arc section 3 can press the paste into the screen plate to ensure the printing ink permeability, and the fine grid line is prevented from being broken.

Fig. 3 is a left side view of a doctor blade structure according to the present utility model, and as shown in fig. 3, in a doctor blade assembly 00 according to an embodiment of the present utility model, an arc-shaped section 3 of a doctor blade 01 includes a first top surface 31 and a first bottom surface 32, a straight section 2 includes a second top surface 21 and a second bottom surface 22, the first top surface 31 is parallel to the first bottom surface 32, and the second top surface 21 is parallel to the second bottom surface 22. Specifically, the arc section 3 and the straight section 2 respectively include a first top surface 31 and a first bottom surface 32, and a second top surface 21 and a second bottom surface 22, wherein the first top surface 31 and the first bottom surface 32 of the arc section 3 are arc surfaces, the arc surface of the first top surface 31 is parallel to the arc surface of the first bottom surface 32, the second top surface 21 and the second bottom surface 22 of the straight section 2 are rectangular surfaces, and the rectangular surface of the second top surface 21 is parallel to the rectangular surface of the second bottom surface 22, so that the doctor 01 has a regular shape and uniform thickness, and the action during screen printing is smoother.

With continued reference to fig. 3, in the doctor assembly 00 according to the present utility model, the first top surface 31 is connected to the second top surface 21, and the first bottom surface 32 is connected to the second bottom surface 22. Specifically, the doctor 01 is of an integrally formed structure, so that the straight section 2 of the doctor 01 is connected with the arc section 3, the first top surface 31 of the arc section 3 of the doctor 01 is connected with the second top surface 21 of the straight section 2 of the doctor 01, the transition is smooth and fluent, the first bottom surface 32 of the arc section 3 of the doctor 01 is connected with the second bottom surface 22 of the straight section 2 of the doctor 01, and the transition is smooth and fluent, namely, the doctor 01 is not only in transition fluent at the joint of the straight section 2 and the arc section 3, but also the whole line of the doctor 01 is even and fluent, so that the printing action in screen printing is fluent, and no extra marks are generated.

Referring to fig. 3, in the doctor assembly 00 provided in the embodiment of the utility model, an end of the first top surface 31 away from the second top surface 21 is higher than an end of the first top surface 31 connected to the second top surface 21, and an end of the first bottom surface 32 away from the second bottom surface 22 is higher than an end of the first bottom surface 32 connected to the second bottom surface 22. Specifically, the first top surface 31 of the scraper 01 arc-shaped section 3 is higher than the first top surface 31 of the scraper 01 arc-shaped section 3, which is away from the second top surface 21 of the scraper 01 straight-shaped section 2, and the first bottom surface 32 of the scraper 01 arc-shaped section 3 is higher than the first bottom surface 32 of the scraper 01 arc-shaped section 3, which is away from the second bottom surface 22 of the scraper 01 straight-shaped section 2, that is, the height of the scraper 01 arc-shaped section 3, which is away from the end of the straight-shaped section 2, is higher than the height of the end of the scraper 01 arc-shaped section 3, which is connected with the straight-shaped section 2, which is away from the printing screen, and the height of the end of the scraper 01 arc-shaped section 3, which is connected with the straight-shaped section 2, is higher than the first bottom surface 32 of the scraper 01 arc-shaped section 3, which is in contact with the printing screen, is arc-shaped, and thus the contact area between the arc-shaped section 3 and the printing screen can be made larger, and the printing screen can be pressed more efficiently.

Fig. 4 is a schematic view showing the angle between the plane of the arc bottom surface of the doctor blade and the plane of the straight bottom surface, as shown in fig. 4, in the doctor blade assembly 00 provided by the embodiment of the utility model, an included angle α formed by one end of the first bottom surface 32 near the second bottom surface 22 along a tangential plane L1 of the first bottom surface 32 and a plane L0 of the second bottom surface 22, where 0< α is less than or equal to 30 °, specifically, the first bottom surface 32 of the doctor blade 01 arc section 3 in contact with the printing screen is arc, and the distance between the first bottom surface 32 of the doctor blade 01 arc section 3 and the printing screen is in a height difference, that is, when the included angle α formed by one end of the first bottom surface 32 of the doctor blade 01 arc section 3 near the first bottom surface 32 and the plane L0 of the second bottom surface 22 is 5 °, the first bottom surface 32 is more favorable to contact with the first screen printing material in a larger contact surface area than the first arc section 3 in the process of the first arc section 3; when an included angle alpha formed by one end, close to the second bottom surface 22, of the first bottom surface 32 of the arc-shaped section 3 of the scraper, along a tangential plane L1 of the first bottom surface 32 and a plane L0 where the second bottom surface 22 is positioned is 10-20 degrees, the contact area between the first bottom surface 32 of the arc-shaped section 3 of the scraper and a printing screen is further increased, so that preliminary infiltration of the screen with a larger area is facilitated, and impression consolidation of the rear straight section 2 is facilitated; if the included angle alpha is too small, the first bottom surface 32 of the arc-shaped section 3 of the scraper 01 is in horizontal fit with the printing screen, so that the technical effect of increasing the contact area between the arc-shaped section 3 of the scraper 01 and the printing screen can not be achieved; if the included angle α is too large, the first bottom surface 32 of the arc-shaped section 3 of the scraper 01 tends to be in vertical contact with the printing screen, that is, the first bottom surface 32 of the arc-shaped section 3 of the scraper 01 cannot be in effective contact with the printing screen, and the technical effect of increasing the contact area between the printing screen and the scraper 01 cannot be achieved, so that the included angle α between the tangential plane L1 of the first bottom surface 32 of the first arc-shaped section 3 of the scraper 01 and the plane L0 of the second bottom surface 22 of the straight section 2 is preferably 0-30 °, and the contact area between the scraper 01 and the printing screen is maximum, thereby ensuring the printing effect.

Fig. 5 is a perspective view of a doctor assembly according to an embodiment of the present utility model, and referring to fig. 5 and 2, in the doctor assembly 00 according to an embodiment of the present utility model, the doctor assembly further includes an overflow preventing portion 4, wherein the overflow preventing portion 4 includes a first overflow preventing portion 41 and a second overflow preventing portion 42, the first overflow preventing portion 41 and the second overflow preventing portion 42 are symmetrically disposed at two sides of the tool holder 1 and are fixedly connected with the tool holder 1, the first overflow preventing portion 41 and the second overflow preventing portion 42 are curved plates including concave surfaces, and the concave surfaces are located at one side of the curved plates facing the tool holder 1.

In particular, in the printing process, since the doctor blade 01 extrudes printing paste into the mesh of the printing screen, and the paste has certain fluidity, the paste overflows inevitably during the printing process, and in order to ensure the printing effect, preferably, the doctor blade assembly 00 further includes an overflow preventing portion 4, where the overflow preventing portion 4 includes a first overflow preventing portion 41 and a second overflow preventing portion 42, the first overflow preventing portion 41 is fixed on the doctor blade 1 and is located at one side of the doctor blade 01 in the non-extension direction, the second overflow preventing portion 42 is fixed on the doctor blade 1 and is located at the other side of the doctor blade 01 in the non-extension direction, and the first overflow preventing portion 41 and the second overflow preventing portion 42 are symmetrically disposed at two sides of the doctor blade 1 with the doctor blade 1 as a center and are fixedly connected with the doctor blade 1 through a fixing member, that is, the first overflow preventing portion 41 and the second overflow preventing portion 42 are both curved panels including concave surfaces, the concave surface of the first anti-overflow part 41 is positioned on one side of the curved plate facing the knife rest 1, the concave surface of the second anti-overflow part 42 is positioned on the other side of the curved plate facing the knife rest 1, the direction shown by an arrow in fig. 5 is the advancing direction of the scraper component 00, when the paste is printed, the relative position relationship between the arc-shaped section 3 and the straight section 2 along the advancing direction of the battery piece is that the arc-shaped section 3 is in front, the straight section 2 is behind, and the anti-overflow part 4 is positioned on two sides of the knife rest 1, thus, the anti-overflow part 4 can prevent the printing paste from overflowing, plays a role in recycling the paste, further ensures the printing effect, fully overflows the paste on two sides of the straight section 2 of the scraper 01 in the process of the outwards expanding design, prevents the paste from continuously overflowing, the anti-overflow part 4 retracts and collects the paste to a certain extent through the first anti-overflow part 41 and the second anti-overflow part 42, avoids the paste overflowing to two sides, but keep flowing with scraper 01 unanimous running direction, reduce the thick liquids extravagant, avoid thick liquids to pile up at coverage area simultaneously, reduce the dry thick liquids risk that causes by thick liquids pile up, ensure the silk screen printing quality of battery piece to slow down thick liquids volatilization rate.

Referring to fig. 1 and 5, in a doctor assembly 00 according to an embodiment of the present utility model, one end of a first overflow preventing portion 41, which is close to a plane of a second bottom surface 22, is 1-3mm higher than the plane of the second bottom surface 22; the end of the second overflow prevention section 42, which is close to the plane of the second bottom surface 22, is 1-3mm higher than the plane of the second bottom surface 22. Specifically, one end of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the plane of the second bottom surface 22 of the straight section 2 of the doctor blade 01, is 1-3mm higher than the plane of the second bottom surface 22 of the straight section 2 of the doctor blade 01, so that damage to the screen printing plate in the printing process due to the fact that the materials of the first overflow preventing portion 41 and the second overflow preventing portion 42 are too hard can be avoided.

Referring to fig. 1, as shown in the drawing, in the doctor assembly 00 provided by the embodiment of the utility model, the overflow preventing portion 4 further includes a sheath 40, and the sheath 40 is located on one side of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the doctor 01. Specifically, the side, close to the straight section 2 of the scraper 01, of the first overflow preventing part 41 and the second overflow preventing part 42 is also provided with a sheath 40, the bottom of the first overflow preventing part 41 and the bottom of the second overflow preventing part 42 can be prevented from being directly contacted with the screen printing plate by the sheath 40, particularly when the printing pressure is high, the screen printing plate can be directly scraped and recycled by the sheath 40, the screen printing plate can be prevented from being damaged, and the screen printing safety is improved; thus, by arranging the sheath 40, the damage of the screen plate can be avoided while the slurry is prevented from overflowing to scrape the material back, and the printing safety is improved; the connection of the first and second anti-overflow portions 41 and 42 with the sheath 40 provides support for the scraping and feeding back process.

Referring to fig. 1 and 3, in a doctor assembly 00 according to an embodiment of the utility model, an end of a sheath 40 adjacent to a second bottom surface 22 is lower than an end of a first overflow preventing portion 41 and a second overflow preventing portion 42 adjacent to the second bottom surface 22, and is flush with a plane on which the second bottom surface 22 is located. Specifically, the end of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the second bottom surface 22 of the straight section 2 of the doctor 01, is higher than the plane 1-3mm of the second bottom surface 22 of the straight section 2 of the doctor 01, that is, the sheath 40 may be disposed at the end of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the plane of the second bottom surface 22 of the straight section 2 of the doctor 01, and disposed at the side of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the straight section 2 of the doctor 01, so that the sheath 40 may be disposed through a partial area, that is, the sheath 40 is disposed only at the end of the first overflow preventing portion 41 and the second overflow preventing portion 42, which is close to the screen plate, so that raw materials are more saved than the sheath 40 is disposed over the whole surface, further, the sheath 40 may be disposed as a detachable sheath 40, which may be directly detached for cleaning or replacing when the sheath 40 is too long or directly detached for ageing when the rubber is used.

With continued reference to fig. 1, in the doctor assembly 00 according to the embodiment of the present utility model, the sheath 40 is made of natural rubber or synthetic rubber. Preferably, the sheath 40 can be made of softer rubber, when the printing pressure is high, the screen printing screen can be directly scraped and returned through the softer rubber sheath 40, damage to the screen printing screen can be avoided, and the screen printing safety is improved.

In summary, the scraper component provided by the utility model at least has the following beneficial effects:

The present application provides a doctor assembly comprising: a knife rest and a scraper; the knife rest is positioned above the scraper and connected with the scraper; the scraper is integrally formed and comprises an arc section and a straight section, the arc section is smoothly connected with the straight section, screen printing is carried out on the scraper component in a relative position relation of the front arc section and the rear straight section along the advancing direction of the battery piece, firstly, the arc section positioned at the front end of the straight section can enlarge the contact area of the scraper with slurry and a screen plate, then, the straight section positioned at the rear end of the arc section can press the slurry into meshes of the screen plate, the printing ink permeability is ensured, the broken grid of a fine grid line is avoided, and the overflow prevention parts positioned at the two sides of the tool rest prevent the slurry from overflowing in the imprinting process; the integrally formed scraper has regular appearance and uniform thickness, and can enable the action during screen printing to be smoother; the included angle alpha between the tangent plane of the first bottom surface of the scraper arc section, which is close to the second bottom surface of the straight section, and the plane where the second bottom surface is located is preferably 0< alpha less than or equal to 30 degrees, so that the maximum contact area between the scraper and the printing screen can be realized, and the printing effect is ensured; the overflow prevention part is arranged to prevent the printing paste from overflowing, play a role in returning materials and further ensure the printing effect; by arranging the sheath, the damage of the screen printing plate can be avoided while the overflow of the sizing agent is prevented for scraping the material back, and the printing safety is improved; the first overflow preventing part and the second overflow preventing part are connected with the sheath to provide support for the scraping and feeding back process; the sheath is arranged at one end of the first overflow preventing part and one end of the second overflow preventing part, which are close to the screen printing plate, so that raw materials are saved compared with the whole surface of the screen printing plate, the sheath can be arranged as a detachable sheath, and when the sheath is dirty or the service time is too long, the rubber is aged, the sheath can be directly detached and replaced; the sheath can adopt softer rubber material, and when printing pressure is great, the sheath adopts softer rubber material, can avoid the half tone impaired, improves silk screen printing security.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (10)

1. A doctor assembly, comprising: a knife rest and a scraper;

the knife rest is positioned above the scraper and connected with the scraper;

The scraper is integrally formed and comprises an arc-shaped section and a straight section, and the arc-shaped section is smoothly connected with the straight section.

2. The doctor assembly as claimed in claim 1, wherein the arcuate segment includes a first top surface and a first bottom surface, the straight segment includes a second top surface and a second bottom surface, the first top surface is parallel to the first bottom surface, and the second top surface is parallel to the second bottom surface.

3. The doctor assembly as claimed in claim 2, wherein said first top surface is contiguous with said second top surface and said first bottom surface is contiguous with said second bottom surface.

4. A doctor assembly as claimed in claim 3, wherein said first top surface is higher at an end remote from said second top surface than at an end of said first top surface connected to said second top surface, and said first bottom surface is higher at an end remote from said second bottom surface than at an end of said first bottom surface connected to said second bottom surface.

5. A doctor assembly as claimed in claim 2, characterized in that the end of the first bottom surface adjacent to the second bottom surface forms an angle α with the plane of the second bottom surface along the tangent plane of the first bottom surface, 0< α being smaller than or equal to 30 °.

6. The doctor assembly according to claim 2, further comprising an overflow prevention portion, wherein the overflow prevention portion comprises a first overflow prevention portion and a second overflow prevention portion, the first overflow prevention portion and the second overflow prevention portion are symmetrically disposed on two sides of the blade holder and fixedly connected with the blade holder, the first overflow prevention portion and the second overflow prevention portion are curved plates comprising concave surfaces, and the concave surfaces are located on one side of the curved plates facing the blade holder.

7. The doctor assembly as claimed in claim 6, wherein the first spill guard has an end adjacent the plane of the second bottom surface that is 1-3mm higher than the plane of the second bottom surface; one end of the second overflow prevention part, which is close to the plane of the second bottom surface, is 1-3mm higher than the plane of the second bottom surface.

8. The doctor assembly as claimed in claim 6, wherein the spill guard further includes a sheath located on a side of the first and second spill guard adjacent the doctor blade.

9. The doctor assembly as claimed in claim 8, wherein the sheath has an end adjacent the second bottom surface that is lower than the ends of the first and second spill guards adjacent the second bottom surface and is flush with the plane of the second bottom surface.

10. The doctor assembly as claimed in claim 8, wherein the sheath is made of natural or synthetic rubber.