Universal tin ash scraping-free air knife

Abstract

The utility model provides a universal tin ash scraping-free air knife, which comprises a mould body and a shell, the mould body comprises an upper mould, a lower mould, a lower mould, a first air inlet, a second air inlet and a third air outlet, the upper mould comprises a first center hole section and an air inlet hole section, and the first center hole section extends along the axial direction; the lower die comprises a platform part, a second center hole section is arranged on the platform part, the platform part is fixedly connected with the upper die, a side surrounding part is arranged on the side, away from the upper die, of the platform part, and a cavity is formed in the side surrounding part; the shell is arranged on the outer side of the mold body in a sleeving mode and connected with the mold body in a rotating or sliding mode. Air outlet holes are formed in the side wall part and / or the shell; and the adjusting assembly is used for adjusting the position of the shell on the mold body and adjusting the size of the air outlet hole. The universal tin ash scraping-free air knife in the embodiment of the utility model can meet the production requirements of producing different types of products, greatly improves the production efficiency, and reduces the inventory pressure of the air knife.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing, and particularly relates to a universal type of scraping-free tin ash air knife. Background Art

[0002] Photovoltaic welding ribbons are usually produced using a hot-dip tinning process. In order to control the thickness of the tin coating layer, a wind knife is required at the tin outlet to control the thickness through wind force. Although nitrogen is currently basically used as the control gas, the tin liquid surface will continue to roll under the stirring of the wind and cannot be completely isolated from the air. Therefore, tin ash will gradually accumulate at the tin outlet of the tin ribbon. These tin ashes need to be removed regularly, otherwise when they accumulate to a certain extent, they will stick to the tin ribbon to produce tin slag and tin nodules.

[0003] The accumulation and cleaning of tin ash directly determines the quality of photovoltaic welding strips. At present, various welding strip manufacturers generally adopt the following methods: 1) manual cleaning; 2) automatic tin ash cleaning device; 3) use of non-scraping tin ash type wind knife. The first two methods require regular cleaning of the deposits at the tin outlet, and have high precision requirements for personnel or equipment operations. The third method usually adds a layer of protective cover under the wind knife. Nitrogen will fill the space inside the protective cover to protect the tin liquid in the cavity from oxidation, thereby reducing the generation of tin ash. In order to maintain the air pressure balance inside and outside the protective cover, a certain area of ​​holes needs to be opened on the wall of the protective cover so that the gas in the cavity can be discharged. However, due to the different types of products, their wire diameters, coating thicknesses, and tin plating speeds, the wind parameters used by different types of products in production are inconsistent. Therefore, when the same wind knife is used to produce different types of welding strips, the internal air pressure is different, which will cause tin plating defects. Therefore, it is often necessary to prepare a variety of scraper-free tin ash air knives with different apertures to meet the production needs of different equipment and different types of products, which puts a lot of pressure on the inventory of air knives. Summary of the invention

[0004] In order to solve at least one technical problem in the prior art, the embodiment of the utility model provides a universal type of scraper-free tin ash air knife, which can be applied to the production of different types of products. In order to achieve the above technical purpose, the technical solution adopted by the embodiment of the utility model is:

[0005] The utility model embodiment provides a universal type scraping-free tin ash air knife, comprising a mold body and a shell, wherein the mold body comprises:

[0006] An upper die, the upper die comprising a first central hole section and an air inlet hole section, wherein the first central hole section extends in the axial direction;

[0007] A lower mold, the lower mold comprising a platform portion, the platform portion is provided with a second center hole segment, the platform portion is fixedly connected to the upper mold, and a side surrounding portion is provided on a side of the platform portion away from the upper mold, and a cavity is provided in the side surrounding portion; the first center hole segment, the air inlet segment, the second center hole segment, and the cavity are connected;

[0008] The shell is sleeved on the outside of the mold body and is rotatably or slidably connected to the mold body; the side surrounding part and / or the shell are provided with air outlet holes;

[0009] The adjusting component is used to adjust the position of the shell on the mold body and the size of the air outlet.

[0010] Further, the adjustment assembly includes a mounting seat, a gear member and a threaded block;

[0011] The mounting seat and the gear member are disposed on one of the housing and the mold body, and the threaded block is disposed on the other;

[0012] The gear member comprises a connecting section and a gear section, wherein the connecting section is rotatably connected to the mounting seat, and the gear section is meshed with the threaded block.

[0013] Further, the mounting seat is fixedly connected to the upper mold, and a through hole is provided on the mounting seat;

[0014] The gear member extends in the axial direction, a section of the gear member close to the upper die is the connecting section, the connecting section is rotatably arranged in the through hole, and a section of the gear member close to the lower die is the gear segment;

[0015] The thread block is arranged on the shell and arranged along the circumferential direction, and any protrusion of the thread block extends along the axial direction.

[0016] Furthermore, the side surrounding portion is provided with at least one first air outlet, and the shell is provided with at least one second air outlet, the number and positions of the first air outlet correspond one-to-one with the number and positions of the second air outlet, and any one of the first air outlets partially or completely overlaps with one of the second air outlets.

[0017] Furthermore, the first air outlet hole and / or the second air outlet hole is a waist-shaped hole and extends in the circumferential direction.

[0018] Further, the mounting seat is fixedly connected to the upper mold, and a through hole is provided on the mounting seat;

[0019] The gear member extends along the tangent direction of the housing, one section of the gear member is the connecting section, the connecting section is rotatably disposed in the through hole, and the other section of the gear member is the gear segment;

[0020] The thread block is arranged on the shell body and arranged along the axial direction, and any protrusion on the thread block extends along the circumferential direction.

[0021] Furthermore, the lower mold is provided with at least one third air outlet hole, the third air outlet hole is a waist-shaped hole and extends in the axial direction, and the shell partially covers or completely opens the third air outlet hole.

[0022] Furthermore, a high temperature resistant tape is provided on the inner side of the shell.

[0023] Furthermore, a sealing channel is provided on a side of the upper die close to the lower die and / or a side of the lower die close to the upper die, and a sealing ring is provided in the sealing channel.

[0024] Furthermore, a convex portion is provided on one side of the upper mold close to the lower mold and on the outer side of the upper mold, and a concave portion is provided on one side of the lower mold close to the upper mold; when the molds are closed, the convex portion of the upper mold can abut against the concave portion of the lower mold.

[0025] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0026] The universal scraper-free tin ash air knife in the embodiment of the utility model is designed with a shell on the outside of the mold body, and uses gear parts and threaded blocks to engage with each other to fine-tune the position of the shell on the mold body and the size of the air outlet, thereby balancing the air pressure inside and outside the cavity.

[0027] The universal scraper-free tin ash air knife in the embodiment of the utility model can adapt to various production parameters and can be used for the production of any type of products. When producing products of different types, there is no need to frequently replace the air knife, so as to meet the production requirements of products of different types, thereby greatly improving production efficiency and reducing air knife inventory pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of a universal scraper-free tin ash air knife in an embodiment of the utility model.

[0029] Figure 2 It is a schematic structural diagram of a universal scraper-free tin ash air knife in one embodiment of the utility model.

[0030] Figure 3 This is a schematic structural diagram of a universal scraper-free tin ash air knife in another embodiment of the utility model. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] The utility model embodiment provides a universal type scraping-free tin ash air knife, comprising:

[0036] The mold body 1 and the shell 2, the mold body 1 includes:

[0037] An upper die 11, wherein the upper die 11 comprises a first central hole section 11a and an air inlet hole section 11b, wherein the first central hole section 11a extends in the axial direction;

[0038] The lower mold 12 includes a platform portion 121, a second center hole segment 121a is provided on the platform portion 121, the platform portion 121 is fixedly connected to the upper mold 11, and a side surrounding portion 122 is provided on a side of the platform portion 121 away from the upper mold 11, and a cavity 122a is provided in the side surrounding portion 122; the first center hole segment 11a, the air inlet segment 11b, the second center hole segment 121a, and the cavity 122a are connected;

[0039] The shell 2 is sleeved on the outside of the mold body 1 and is rotatably or slidably connected to the mold body 1; an air outlet 21 is provided on the side surrounding portion 122 and / or the shell 2;

[0040] The adjusting component 3 is used to adjust the position of the shell 2 on the mold body 1 and adjust the size of the air outlet 21 .

[0041] In a specific embodiment, Figure 1 As shown, the upper mold 11 and the lower mold 12 are arranged in sequence from top to bottom, the upper section of the lower mold 12 is the platform portion 121, and the lower section is the side surrounding portion 122. During operation, the solder strip enters the second center hole section 121a downward from the first center hole section 11a of the upper mold 11, passes through the cavity 122a, and then is output from the bottom of the lower mold 12. The second center hole section 121a is provided on the platform portion 121, and the side surrounding portion 122 is located below the platform portion 121, that is, the side surrounding portion 122 is located below the tin liquid level of the solder strip, and because the first center hole section 11a, the second center hole section 121a, the air inlet section 11b, and the cavity 122a are connected, during operation, nitrogen is introduced into the mold body 1 through the air inlet section 11b, and the nitrogen can fill the cavity 122a, ensuring that the tin liquid on the surface of the solder strip in the cavity 122a will not be oxidized, thereby reducing the generation of tin ash. At the same time, the nitrogen in the cavity 122a flows out from the air outlet 21, thereby achieving a balance of air pressure inside and outside the mold body 1. It should be noted that if the air pressure in the cavity 122a is too high, the airflow will rebound against the air inlet edge, causing airflow turbulence and causing defects in the tin layer of the solder strip; if the air pressure in the cavity 122a is too low, air will enter the cavity 122a, causing oxidation of the tin liquid on the surface of the solder strip. Therefore, in the present application, the adjustment component 3 can adjust the position of the shell 2 on the mold body 1 and adjust the size of the air outlet 21, and then can adjust the amount of nitrogen in the cavity 122a to ensure that the air pressure of the cavity 122a in the side surrounding portion 122 and the outside of the side surrounding portion 122 remain balanced. Therefore, the present application can be applied to products of different models and has a wide range of applications.

[0042] The upper mold 11 is fixedly connected to the lower mold 12. In a specific embodiment, the upper mold 11 is provided with a mounting through hole, which extends axially. The platform portion 121 is provided with an assembly through hole. The universal type scraper-free tin ash air knife also includes a mounting bolt, which passes through the mounting through hole and is threadedly connected to the assembly through hole, thereby being able to fixedly connect the upper mold 11 and the platform portion 121, that is, to fixly connect the upper mold 11 and the lower mold 12.

[0043] The present application does not limit the specific configuration of the adjustment component 3. In a specific embodiment, the adjustment component 3 includes a mounting seat 31, a gear member 32 and a threaded block 33;

[0044] The mounting seat 31 and the gear member 32 are disposed on one of the housing 2 and the mold body 1 , and the threaded block 33 is disposed on the other one;

[0045] The gear member 32 includes a connecting section 32 a and a gear section 32 b . The connecting section 32 a is rotatably connected to the mounting seat 31 , and the gear section 32 b is meshed with the threaded block 33 .

[0046] In a specific embodiment, the mounting seat 31 and the gear member 32 are arranged on the shell 2, and the threaded block 33 is arranged on the upper mold 11. When the gear member 32 rotates, the gear segment 32b can drive the threaded block 33 to move, thereby enabling the shell 2 and the upper mold 11 to move relative to each other.

[0047] In another specific embodiment, the mounting seat 31 and the gear member 32 are disposed on the upper mold 11, and the threaded block 33 is disposed on the housing 2. When the gear member 32 rotates, the threaded block 33 can also be driven to move. In this embodiment, the mounting method of the gear member 32 and the threaded block 33 is not limited. In one embodiment, the mounting seat 31 is fixedly connected to the upper mold 11, and a through hole is provided on the mounting seat 31;

[0048] The gear member 32 extends axially, a section of the gear member 32 close to the upper die 11 is the connecting section 32a, the connecting section 32a is rotatably disposed in the through hole, and a section of the gear member 32 close to the lower die 12 is the gear section 32b;

[0049] The thread block 33 is disposed on the housing 2 and arranged circumferentially, and any protrusion of the thread block 33 extends axially. Figure 2 As shown, the upper mold 11 is fixedly connected to the platform portion 121 of the lower mold 12, the upper section of the gear member 32 is the connecting section 32a, which is rotatably connected to the mounting seat 31, and the lower section is the gear section 32b, which is meshed with the threaded block 33. When the gear member 32 rotates, it can drive the threaded block 33 on the shell 2 to rotate in the circumferential direction, and then drive the shell 2 to rotate, thereby realizing the rotation between the shell 2 and the lower mold 12.

[0050] It should be noted that, in any embodiment of the present application, the size, shape, and number of the air outlet 21 are not limited, and the size, shape, and number of the air outlet 21 can be adaptively adjusted according to actual needs. In the above embodiment, the side surrounding portion 122 is provided with at least one first air outlet 21a, and the shell 2 is provided with at least one second air outlet 21b. The number and position of the first air outlet 21a correspond to the number and position of the second air outlet 21b one by one, and any first air outlet 21a partially overlaps or completely overlaps with any second air outlet 21b. It can be understood that when the shell 2 rotates relative to the lower mold 12, the overlapping area of ​​the second air outlet 21b and the first air outlet 21a can be increased or decreased. The larger the overlapping area of ​​the first air outlet 21a and the second air outlet 21b, the greater the nitrogen outflow in the cavity 122a. Conversely, the smaller the overlapping area of ​​the first air outlet 21a and the second air outlet 21b, the smaller the nitrogen outflow in the cavity 122a. In this way, the amount of gas in the cavity 122a can be adjusted, and the more the number of the first air outlet 21a and the second air outlet 21b is, the greater the nitrogen outflow. Conversely, the fewer the number of the first air outlet 21a and the second air outlet 21b is, the smaller the nitrogen outflow is. Therefore, the universal type scraping-free tin ash air knife can be applied to products of different models and has a wide range of applications. In this embodiment, the first air outlet hole 21a and / or the second air outlet hole 21b are waist-shaped holes and extend in the circumferential direction. In another embodiment, the first air outlet hole 21a and the second air outlet hole 21b are round holes.

[0051] In another specific embodiment, the mounting seat 31 is fixedly connected to the upper mold 11, and a through hole is provided on the mounting seat 31;

[0052] The gear member 32 extends along the tangential direction of the housing 2, one section of the gear member 32 is the connecting section 32a, the connecting section 32a is rotatably disposed in the through hole, and the other section of the gear member 32 is the gear section 32b;

[0053] The thread block 33 is arranged on the housing 2 and arranged axially, and any protrusion on the thread block 33 extends circumferentially; Figure 3As shown, the thread block 33 is arranged on the outer surface of the shell 2 from top to bottom, and the left side of the gear member 32 is the gear section 32b, which is meshed with the thread block 33. When the gear member 32 rotates, it can drive the thread block 33 to move upward or downward, and then drive the shell 2 to move upward or downward, so as to achieve relative sliding of the shell 2 and the mold body 1. In this embodiment, at least one third air outlet 21c is provided on the lower mold 12. The third air outlet 21c is a waist-shaped hole and extends axially. The shell 2 partially covers or completely opens the third air outlet 21c. Figure 3 As shown, when the shell 2 slides relative to the mold body 1, the opening size of the third air outlet 21c can be increased or decreased. For example, when the shell 2 moves upward, the opening of the third air outlet 21c becomes larger, and the gas outlet amount of nitrogen in the cavity 122a increases; when the shell 2 moves downward, the opening of the third air outlet 21c becomes smaller, and the gas outlet amount of nitrogen in the cavity 122a decreases, thereby adjusting the amount of gas in the cavity 122a, and thus the universal scraper-free tin ash air knife in this embodiment can also be suitable for products of different models.

[0054] Furthermore, a high temperature resistant tape 4 is provided on the inner side of the housing 2. Figure 1 As shown, the high temperature resistant tape 4 can prevent the shell 2 from being damaged by high temperature, thereby extending the service life of the shell 2.

[0055] Further, a sealing channel is provided on one side of the upper die 11 close to the lower die 12 and / or a side of the lower die 12 close to the upper die 11, and a sealing ring 5 is provided in the sealing channel. Figure 1 As shown, the sealing ring 5 can improve the sealing between the upper mold 11 and the lower mold 12 to avoid air leakage.

[0056] Further, a convex portion 111 is provided on one side of the upper mold 11 close to the lower mold 12 and on the outer side of the upper mold 11, and a groove is provided on one side of the lower mold 12 close to the upper mold 11; when the molds are closed, the convex portion 111 of the upper mold 11 can abut against the groove of the lower mold 12, such as Figure 1 As shown, this structure is conducive to quickly positioning and installing the upper mold 11 and the lower mold 12, thereby improving the installation efficiency of the upper mold 11 and the lower mold 12.

[0057] In the present application, the number and position of the air inlet hole sections 11b of the upper mold 11 can also be adaptively adjusted according to actual needs. Furthermore, the upper mold 11 is provided with two air inlet hole sections 11b, one of which is provided on one side of the first central hole section 11a, and the other of which is provided on the other side of the first central hole section 11a. An air inlet member is provided on any of the air inlet pipes, and an air inlet channel is provided in the air inlet member, and the air inlet channel and the air inlet hole section 11b are connected. Figure 1 As shown, the left side of the first center hole segment 11a is an air inlet hole segment 11b, and the right side is also an air inlet hole segment 11b. Nitrogen is introduced into the left and right sides of the first center hole segment 11a at the same time, so that the nitrogen filling in the cavity of the mold body 1 is more uniform, avoiding oxidation of the tin liquid on the surface of the solder strip.

[0058] Furthermore, the cross-sectional area of ​​the first center hole section 11 a gradually decreases from the side away from the lower mold 12 to the side close to the lower mold 12 , and this structure is conducive to introducing the welding strip into the first center hole section 11 a .

[0059] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A universal type of scraping-free tin ash air knife, characterized in that: It comprises a mould body (1) and a shell (2), wherein the mould body (1) comprises: An upper die (11), the upper die (11) comprising a first central hole section (11a) and an air inlet hole section (11b), the first central hole section (11a) extending in the axial direction; A lower mold (12), the lower mold (12) comprising a platform portion (121), the platform portion (121) being provided with a second central hole segment (121a), the platform portion (121) being fixedly connected to the upper mold (11), and a side surrounding portion (122) being provided on a side of the platform portion (121) facing away from the upper mold (11), the side surrounding portion (122) being provided with a cavity (122a); the first central hole segment (11a), the air inlet segment (11b), the second central hole segment (121a), and the cavity (122a) being in communication; The shell (2) is sleeved on the outside of the mold body (1) and is rotationally or slidably connected to the mold body (1); an air outlet (21) is provided on the side surrounding portion (122) and / or the shell (2); An adjustment component (3) is used to adjust the position of the shell (2) on the mold body (1) and to adjust the size of the air outlet hole (21).

2. The universal type scraping-free tin ash air knife as claimed in claim 1, characterized in that: The adjustment assembly (3) comprises a mounting seat (31), a gear member (32) and a threaded block (33); The mounting seat (31) and the gear member (32) are provided on one of the shell (2) and the mold body (1), and the threaded block (33) is provided on the other. The gear member (32) comprises a connecting section (32a) and a gear section (32b); the connecting section (32a) is rotatably connected to the mounting seat (31); and the gear section (32b) is meshed with the threaded block (33).

3. The universal type scraping-free tin ash air knife as claimed in claim 2, characterized in that: The mounting seat (31) is fixedly connected to the upper mold (11), and a through hole is provided on the mounting seat (31); The gear member (32) extends axially, a section of the gear member (32) close to the upper die (11) is the connecting section (32a), the connecting section (32a) is rotatably arranged in the through hole, and a section of the gear member (32) close to the lower die (12) is the gear section (32b); The threaded block (33) is arranged on the housing (2) and is disposed in the circumferential direction, and any protrusion of the threaded block (33) extends in the axial direction.

4. The universal scraping-free tin ash air knife as claimed in claim 3, characterized in that: The side surrounding portion (122) is provided with at least one first air outlet hole (21a), and the shell (2) is provided with at least one second air outlet hole (21b), the number and positions of the first air outlet holes (21a) correspond one-to-one to the number and positions of the second air outlet holes (21b), and any one of the first air outlet holes (21a) partially overlaps or completely overlaps with any one of the second air outlet holes (21b).

5. The universal type scraping-free tin ash air knife as claimed in claim 4, characterized in that: The first air outlet hole (21a) and / or the second air outlet hole (21b) are waist-shaped holes and extend in the circumferential direction.

6. The universal scraping-free tin ash air knife as claimed in claim 2, characterized in that: The mounting seat (31) is fixedly connected to the upper mold (11), and a through hole is provided on the mounting seat (31); The gear member (32) extends along a tangential direction of the housing (2); one section of the gear member (32) is the connecting section (32a); the connecting section (32a) is rotatably disposed in the through hole; and another section of the gear member (32) is the gear section (32b); The threaded block (33) is arranged on the housing (2) and is arranged axially, and any protrusion on the threaded block (33) extends in the circumferential direction.

7. The universal scraping-free tin ash air knife as claimed in claim 6, characterized in that: The lower mould (12) is provided with at least one third air outlet hole (21c), the third air outlet hole (21c) is a waist-shaped hole and extends in the axial direction, and the shell (2) partially covers or completely opens the third air outlet hole (21c).

8. The universal type scraping-free tin ash air knife as claimed in claim 1, characterized in that: A high temperature resistant adhesive tape (4) is provided on the inner side of the shell (2).

9. The universal type scraping-free tin ash air knife as claimed in claim 1, characterized in that: A sealing channel is provided on a side of the upper die (11) close to the lower die (12) and / or a side of the lower die (12) close to the upper die (11), and a sealing ring (5) is provided in the sealing channel.

10. The universal scraping-free tin ash air knife according to claim 1, characterized in that: A convex portion (111) is provided on one side of the upper mold (11) close to the lower mold (12) and on the outer side of the upper mold (11), and a concave portion is provided on one side of the lower mold (12) close to the upper mold (11); when the molds are closed, the convex portion (111) of the upper mold (11) can abut against the concave portion of the lower mold (12).

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