CN216659251U

CN216659251U - Screen printing equipment

Info

Publication number: CN216659251U
Application number: CN202123300549.7U
Authority: CN
Inventors: 梅志纲; 符欣; 辛科
Original assignee: Xuancheng Advanced Photovoltaic Technology Co ltd
Current assignee: Xuancheng Advanced Photovoltaic Technology Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-06-03
Anticipated expiration: 2031-12-23

Abstract

The utility model provides a screen printing device, which belongs to the technical field of photovoltaic module processing equipment and comprises: the conveying belt is used for conveying the silicon wafer to be processed; the printing device is used for silk-screening the silicon wafer to be processed and is positioned above the conveying belt, and the printing part is arranged towards the conveying belt; be the ink pad, correspond the setting with printing portion, be the ink pad and seted up and dodge the groove, be the ink pad and can remove in vertical direction for the conveyer belt. According to the screen printing equipment provided by the utility model, when the silicon wafer to be processed on the conveying belt moves to the stamp pad position, the stamp pad moves upwards, the silicon wafer to be processed is jacked to the printing part position of the printing device, after the screen printing of the silicon wafer to be processed is completed, the stamp pad moves downwards, the silicon wafer to be processed falls back to the conveying belt and is conveyed to the next working procedure, the whole screen printing equipment is small in structure and simple to operate, and only the stamp pad is required to be controlled to move up and down in a reciprocating mode.

Description

Screen printing equipment

Technical Field

The utility model relates to the technical field of photovoltaic cell processing equipment, in particular to screen printing equipment.

Background

The solar cell is a photoelectric semiconductor sheet which directly generates electricity by using sunlight, is also called as a solar chip or a photovoltaic cell, can output voltage instantly as long as the solar cell is illuminated under a certain illumination condition, and can simultaneously generate current under the condition of a loop.

The solar cell can be subjected to the technical process of screen printing metallization in the production process, and carriers generated by the cell piece can be better led out through the grid line formed in the metallization process. In the production process of screen printing metallization, a rotary ink pad is usually adopted, that is, a transmission mechanism comprising a plurality of table tops is arranged below a brush head, and the plurality of table tops rotate along a central point and transmit silicon wafers to be processed in a clockwise direction or a counterclockwise direction. The rotary ink pad is adopted, after the previous procedure is completed, the silicon wafer to be processed is conveyed to any circular table top of the ink pad, the silicon wafer to be processed is rotated to a specified position along the clockwise or anticlockwise direction along the table top, the brush head descends to be aligned with the table top for printing, the table top after printing is completed continues to rotate, and the silicon wafer to be processed after printing is conveyed to the next procedure.

Be equipped with a plurality of silicon chips and deposit the position on the rotatory ink pad that is, a plurality of silicon chips are deposited the position and are circumference and arrange on the rotatory ink pad that is, and the rotatory working space that is whole the occupation of the mesa of ink pad is great like this, aligns to each mesa brush head moreover. The metallized printing structure capable of saving the working space is designed, and great advantages are brought to equipment cost reduction.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that the table top of the rotary ink pad in the prior art occupies a large space, so that the screen printing equipment is provided.

In order to solve the technical problem, the utility model provides a screen printing device for metallization printing of a silicon wafer to be processed, which comprises:

the conveying belt is used for conveying the silicon wafer to be processed;

the printing device is used for silk-screening the silicon wafer to be processed and is positioned above the conveying belt, and the printing part is arranged towards the conveying belt;

be the ink pad, at least with printing portion corresponds the setting, just be the ink pad and seted up and dodge the groove, the conveyer belt follows dodge the groove and pass, be the ink pad can for the conveyer belt removes in vertical direction to with pending silicon chip jack-up extremely printing portion position department.

Optionally, the width of the avoidance groove is larger than the width of the conveyor belt.

Optionally, the groove depth of the avoiding groove is greater than the distance between the presenting pad and the printing portion.

Optionally, the cross section of the avoiding groove is rectangular.

Optionally, the top surface of the stamp pad is a frosted surface.

Optionally, the printing machine further comprises a first driving device, the printing table is arranged at a driving end of the first driving device, and the first driving device is suitable for driving the printing table to reciprocate along the vertical direction.

Optionally, the first driving device is a vertically arranged air cylinder or electric cylinder, and the ink pad is mounted at a driving end of the air cylinder or electric cylinder.

Optionally, be the ink pad and follow interval parallel arrangement's two are seted up to extending direction, the syntropy of conveyer belt dodge the groove, two it will to dodge the groove the top surface that is the ink pad divides into three holding surface, and three holding surface keeps flushing in order to be suitable for simultaneously to handle the silicon chip and support.

Optionally, the printing device further comprises a second driving device adapted to control the conveying belt to move, and when the conveying belt stops, the second driving device enables at least one silicon wafer to be processed on the conveying belt to correspond to the position of the top surface of the printing pad.

Optionally, the second driving device is a stepping motor.

The technical scheme of the utility model has the following advantages:

1. according to the screen printing equipment provided by the utility model, when the silicon wafer to be processed on the conveying belt moves to the stamp pad position, the stamp pad moves upwards, the silicon wafer to be processed is jacked to the printing part position of the printing device, after the screen printing of the silicon wafer to be processed is completed, the stamp pad moves downwards, the silicon wafer to be processed falls back onto the conveying belt and is conveyed to the next process.

2. According to the screen printing equipment provided by the utility model, the avoiding groove is formed in the stamp pad, and the conveying belt can pass through the avoiding groove, so that when the stamp pad moves upwards to jack up the silicon wafer to be processed, the conveying belt can be accommodated in the avoiding groove, and the position transmission of the conveying belt to the silicon wafer to be processed is realized.

3. According to the screen printing equipment provided by the utility model, the top surface of the stamp pad is a frosted surface, and the top surface has certain roughness, so that the silicon wafer to be treated is prevented from sliding when being jacked up by the stamp pad.

In conclusion, the screen printing equipment provided by the utility model has the effects of simple structure, simple and rapid action steps, small occupied space, contribution to improving the printing speed and productivity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a front view of a screen printing apparatus provided by an embodiment of the present invention;

fig. 2 is a left side view of the screen printing apparatus provided by the embodiment of the utility model.

Description of reference numerals:

1. presenting a stamp pad; 2. a silicon wafer to be processed; 3. a printing device; 4. a conveyor belt; 5. avoiding the groove.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

The present embodiment provides a specific embodiment of the screen printing apparatus, as shown in fig. 1 and 2, a conveyor belt 4 capable of conveying a silicon wafer 2 to be processed, a printing device 3 being provided above the conveyor belt 4; the printing device 3 is used for silk-screen printing of the silicon wafer 2 to be processed, and a printing part capable of performing silk-screen printing on the silicon wafer 2 to be processed is arranged on the bottom surface of the printing device 3; a presentation pad 1 is provided below the conveyor belt 4, and the presentation pad 1 is provided corresponding to a printing portion of the printing device 3. The printing table 1 can move up and down in the vertical direction relative to the conveying belt 4 so as to jack the silicon wafer 2 to be processed to the position of the printing part. When the silicon wafer 2 to be processed on the conveying belt 4 moves to the position of the stamp pad 1, the stamp pad 1 moves upwards, the silicon wafer 2 to be processed is jacked to the position of the printing part of the printing device 3, the stamp pad 1 moves downwards after the silk-screen printing of the silicon wafer 2 to be processed is completed, the silicon wafer 2 to be processed falls back to the conveying belt 4 and is conveyed to the next procedure, the whole silk-screen printing equipment is small and exquisite in structure, and the operation is simple, and only the up-and-down reciprocating movement of the stamp pad 1 needs to be controlled.

In this embodiment, be and offer on the ink pad 1 and dodge groove 5, and the groove width of dodging groove 5 is greater than the width of conveyer belt 4, and the groove depth of dodging groove 5 is greater than the distance between the top surface that is ink pad 1 and the bottom of printing portion, as shown in fig. 2, conveyer belt 4 has two, dodge groove 5 and 4 volume quantity of conveyer belt corresponding, be the in-process of ink pad 1 rebound, conveyer belt 4 can hold in dodging groove 5, avoid conveyer belt 4 to be ink pad 1 jack-up.

Specifically, the stamp pad 1 is provided with two avoidance grooves 5 arranged in parallel at intervals in the same direction along the extension direction of the conveyor belt, the two avoidance grooves 5 divide the top surface of the stamp pad 1 into three support surfaces, and the three support surfaces are kept flush to simultaneously support a silicon wafer to be processed in the printing process, as shown in fig. 2, the middle support surface has a large area, and can better support most of the printing parts of the silicon wafer to be processed; and the width of the avoiding groove 5 is smaller than that of the printing pad, so that the silicon wafer to be processed can be prevented from being suspended in a large area, and the silicon wafer to be processed is ensured to be relatively uniformly stressed in the silk-screen printing process.

As an alternative embodiment, three or more avoidance grooves 5 may be provided, and the specific number may be changed along with the number of the conveyor belts 4, wherein the width of the avoidance groove 5 should be reduced as much as possible while the number of the avoidance grooves 5 is increased, so that the silicon wafer to be processed can be supported as much as possible.

As an alternative embodiment, the horizontal position of the conveyer belt 4 when stopping can be equal to the printing position, so that the stamp pad 1 and the conveyer belt 4 can simultaneously provide supporting force for the silicon wafer 2 to be processed when performing screen printing, and the suspension area of the silicon wafer 2 to be processed is reduced.

In this embodiment, the cross section of the avoiding groove 5 is rectangular, which is convenient for the processing of the avoiding groove 5, the avoiding groove 5 is a groove penetrating in the conveying direction of the conveyer belt 4 of the stamp pad 1, and the groove does not penetrate in the vertical direction of the stamp pad 1.

In this embodiment, the surface of the stamp pad 1 for jacking up the silicon wafer 2 to be processed is a top surface, and the top surface of the stamp pad 1 is a frosted surface, which has a certain roughness, so as to prevent the silicon wafer 2 to be processed from sliding when being jacked up by the stamp pad 1, thereby preventing the product from being bad.

In this embodiment, be equipped with first drive arrangement below being ink pad 1, be ink pad 1 and install on the drive end of the first drive arrangement of drive, first drive arrangement can drive and be ink pad 1 and accomplish the up-and-down motion of vertical direction. Specifically, the first driving device may be a vertically disposed air cylinder or electric cylinder, and the driving end of the air cylinder or electric cylinder is disposed upward, and the stamp pad 1 is fixedly mounted on the driving end of the air cylinder or electric cylinder, and is driven by the air cylinder or electric cylinder to move up and down.

As an alternative embodiment, the first driving device may also be a driving motor as long as it can drive the printing pad 1 to move up and down.

In this embodiment, a second driving device for controlling the movement of the conveyor belt 4 is further included, and the movement and stop of the conveyor belt 4 can be controlled by the second driving device. In the working process, when the silicon wafer 2 to be processed moves to the position corresponding to the printing part of the printing device and the stamp pad 1, the second driving device stops the movement of the conveyer belt 4, the top surface of at least one silicon wafer 2 to be processed and the stamp pad 1 is in the corresponding position, at the moment, the first driving device controls the stamp pad 1 to move upwards, the silicon wafer 2 to be processed is contacted and supported, and the printing part of the printing device 3 carries out screen printing on the silicon wafer 2 to be processed; after the printing is finished, the first driving device drives the stamp pad 1 to move downwards, the silicon wafer 2 to be processed falls back onto the conveying belt 4 after being separated from the silicon wafer 2 to be processed, and the second driving device drives the conveying belt 4 to continue conveying. The manner in which the second driving device stops the movement of the conveyor belt 4 may be performed by an image sensor in cooperation with control. The second driving device has a pre-deceleration action according to the movement speed of the conveyor belt 4, and can be implemented by a conventional control method in the control field, which is not described in detail herein.

Specifically, the second driving device is a stepping motor, and the position of the silicon wafer 2 to be processed when the conveying belt 4 stops can be accurately controlled through the stepping motor.

As an alternative embodiment, the second drive can also be a servomotor, a gear mechanism, or the like.

In this embodiment, when the silicon wafer 2 to be processed is subjected to screen printing, a gap is formed between the printing portion of the printing device 3 and the silicon wafer 2 to be processed, so as to form a height of a screen printing pattern.

As an alternative embodiment, the printing position of the silicon wafer to be processed can be the same as the position of the conveyer belt 4, that is, when printing is performed, the stamp pad 1 only applies a supporting force to the silicon wafer to be processed, and does not lift the silicon wafer to be processed off the conveyer belt 4.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the utility model.

Claims

1. A screen printing device for the metallization printing of silicon wafers to be treated, characterized by comprising a conveyor belt (4), a printing device (3) and a stamp pad (1), wherein:

the conveying belt (4) is used for conveying the silicon wafer (2) to be processed;

the printing device (3) is used for silk-screening the silicon wafer (2) to be processed and is positioned above the conveying belt (4), and the printing part is arranged towards the conveying belt (4);

be ink pad (1), at least with printing portion corresponds the setting, just be ink pad (1) and seted up and dodge groove (5), conveyer belt (4) are followed dodge groove (5) and pass, be ink pad (1) can for the conveyer belt removes in vertical direction to with pending silicon chip (2) jack-up extremely printing portion position department.

2. A screen printing apparatus according to claim 1, wherein the width of the escape slot (5) is greater than the width of the conveyor belt (4).

3. A screen printing apparatus according to claim 2, wherein the recess depth of the escape recess (5) is greater than the distance between the top surface of the presentation pad (1) and the bottom of the printing portion.

4. A screen printing apparatus as claimed in claim 2, characterised in that the cross-section of the avoiding groove (5) is rectangular.

5. A screen printing apparatus as claimed in claim 1, characterised in that the top surface of the stamp pad (1) is a frosted surface.

6. The screen printing apparatus according to claim 1, further comprising a first driving device, wherein the presentation pad (1) is provided at a driving end of the first driving device, and the first driving device is adapted to drive the presentation pad (1) to reciprocate in a vertical direction.

7. A screen printing apparatus according to claim 6, wherein the first driving device is an air cylinder or an electric cylinder, and the presentation table (1) is mounted at a driving end of the air cylinder or the electric cylinder.

8. The screen printing apparatus according to any one of claims 1 to 7, wherein the presenting pad (1) is provided with two of the avoiding grooves (5) arranged in parallel at intervals in the same direction along the extending direction of the conveyor belt, the two avoiding grooves (5) divide the top surface of the presenting pad (1) into three supporting surfaces, and the three supporting surfaces are kept flush so as to be suitable for supporting the silicon wafer (2) to be processed simultaneously.

9. The screen printing apparatus according to any one of claims 1 to 7, further comprising a second drive device adapted to control the movement of the conveyor belt (4), the second drive device causing at least one silicon wafer to be processed on the conveyor belt (4) to correspond in position to the top surface of the presentation pad (1) when the conveyor belt (4) is stopped.

10. The screen printing apparatus according to claim 9, wherein the second driving device is a stepping motor.