Air blowing tube for air blowing gun and air blowing gun

Abstract

The application provides a blowing pipe for a blowing gun and the blowing gun. The blowing pipe is a hard pipe, which comprises a main pipe section, a branch pipe section and a baffle. The main pipe section comprises a first air inlet, a first air outlet and an opening between the first air inlet and the first air outlet. The branch pipe section comprises a second air inlet and a second air outlet, the second air inlet is communicated with the opening, and the orthographic projection of the second air outlet on the main pipe section is located on one side of the opening away from the first air outlet or at least partially overlaps with the opening. The baffle comprises a blocking part in the main pipe section, the blocking part is located on one side of the opening facing the air outlet, the blocking part comprises opposite first and second ends, the first end is away from the opening and has a gap with the inner surface of the main pipe section, and the second end is close to the opening and has no gap with the inner surface of the main pipe section.

Description

Technical Field

[0001] This application relates to the field of semiconductor processing equipment technology, and in particular to an air tube and an air gun for use in an air gun. Background Technology

[0002] In the semiconductor industry, molded structures produced through molding processes often contain excess encapsulant that needs to be removed. This is typically done using a die-cutting tool to cut the molded structure and remove the excess encapsulant. The die consists of an upper and a lower mold. During the removal process, the molded structure is placed on the lower mold, and the upper mold moves towards the lower mold so that the cutter on the upper mold can cut off the excess encapsulant. The removed encapsulant falls onto the lower mold. If the encapsulant is not removed from the lower mold, when the molded structure is subsequently placed on the lower mold, contact with the residual encapsulant can cause cracking when the cutter cuts into the molded structure. Utility Model Content

[0003] This application provides an air tube and an air gun for use in an air gun.

[0004] According to a first aspect of the embodiments of this application, a blowing tube for an air gun is provided, the blowing tube being a rigid tube, the blowing tube comprising: The main section includes a first air inlet, a first air outlet, and an opening located between the first air inlet and the first air outlet; The branch pipe section includes a second air inlet and a second air outlet. The second air inlet is in communication with the opening. The orthographic projection of the second air outlet on the main pipe section is located on the side of the opening away from the first air outlet or at least partially overlaps with the opening. A baffle includes a blocking portion located within the main pipe section; the blocking portion is located on the side of the opening facing the air outlet; the blocking portion includes a first end and a second end opposite to each other, the first end being away from the opening and having a gap between it and the inner surface of the main pipe section, and the second end being close to the opening and having no gap between it and the inner surface of the main pipe section.

[0005] In one embodiment, the baffle further includes a connecting portion connected to the blocking portion; the connecting portion is located inside the branch pipe section and is welded to the inner surface of the branch pipe section.

[0006] In one embodiment, the maximum width of the baffle is less than the maximum width of the opening and the maximum width of the branch pipe section; the surface of the connecting part is in contact with the inner surface of the branch pipe section.

[0007] In one embodiment, the area of ​​the obstruction portion projected onto a plane perpendicular to the axis of the main pipe section is a first area, the area of ​​the section of the main pipe section perpendicular to its axis is a second area, and the ratio of the first area to the second area is less than one-half.

[0008] In one embodiment, the area of ​​the cross section perpendicular to the branch pipe segment is a third area, which is smaller than the second area.

[0009] In one embodiment, the ratio of the first area to the second area is greater than or equal to one-third.

[0010] In one embodiment, the angle between the axis of the main pipe section and the axis of the branch pipe section is in the range of 30° to 60°.

[0011] In one embodiment, the distance between the first air inlet and the opening is greater than the distance between the first air outlet and the opening; and / or, The distance between the first air outlet and the opening is in the range of 8cm to 10cm; and / or, The distance between the first air outlet and the opening is less than the maximum distance between the second air outlet and the opening.

[0012] According to a second aspect of the embodiments of this application, an air gun is provided, the air gun including a gun body and the aforementioned air tube, the air tube being connected to the gun body.

[0013] In one embodiment, the gun body includes a main body and a handheld switch located on one side of the main body, wherein the handheld switch and the branch pipe section are located on the same side of the main pipe section.

[0014] The air-blowing pipe and air-blowing gun provided in this application embodiment, by setting a blocking part located in the main pipe section, wherein the first end of the blocking part is far from the opening and has a gap with the inner surface of the main pipe section, and the second end is close to the opening and has no gap with the inner surface of the main pipe section, then the gas entering the main pipe section through the first air inlet can flow through the gap between the first end of the blocking part and the inner surface of the main pipe section to the first air outlet and flow out through the first air outlet, while the other part of the gas is blocked by the blocking part and flows to the branch pipe section, and finally flows out through the second air outlet of the branch pipe section; also In other words, the gas in the air blowing pipe can simultaneously flow out through the first air outlet of the main pipe section and the second air outlet of the branch pipe section to clean the bearing surface of the lower mold. Since the orthographic projection of the second air outlet of the branch pipe section on the main pipe section is located on the side of the opening away from the first air outlet, or at least partially overlaps with the opening, the gas blown out of the second air outlet can clean the plastic sealant in the corner of the bearing surface of the lower mold near the operator, blowing away the plastic sealant in that corner. The gas blown out of the first air outlet of the main pipe section can clean the non-edge areas and other corners of the lower mold, blowing away the plastic sealant. It can be seen that the air blowing pipe provided in this embodiment can enable the air blowing gun to clean the plastic sealant on the bearing surface of the lower mold, avoiding the problem of plastic sealant residue causing the plastic sealant structure to crack when the upper mold tool punches the plastic sealant structure, thus improving the yield of the plastic sealant structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a mold assembly provided in an exemplary embodiment of this application; Figure 2 yes Figure 1 A schematic diagram showing a semiconductor structure placed on the lower mold of the mold assembly shown. Figure 3 yes Figure 1 The diagram shows the structure of the die assembly after punching the semiconductor structure placed on the lower die; Figure 4 This is a schematic diagram of the structure of an air gun provided in an exemplary embodiment of this application; Figure 5 yes Figure 4 A magnified view of a portion of area A of the air tube of the air gun shown; Figure 6 Is adopted Figure 4 The diagram shows an air gun blowing away the sealant on the lower mold. Specific Implementation

[0016] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0017] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0018] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] like Figure 1 As shown, the mold used to remove excess sealant from the molded body includes an upper mold 11 and a lower mold 12. The upper mold 11 is equipped with a cutting tool, and the bearing surface 121 of the lower mold 12 is used to place the molded structure. After the cutting tool of the upper mold cuts off the excess sealant of the molded structure 14, the cut-off sealant 13 falls onto the bearing surface 121 of the lower mold 12. An air gun is typically used to clean the sealant 13 that has fallen onto the lower mold 12.

[0020] After the upper mold 11 and lower mold 12 separate, the height to which the upper mold 11 can be raised is limited, resulting in a small distance between the lower mold 12 and the upper mold 11; furthermore, the operator can only operate from one side of the mold. Thus, when the air gun blows the lower mold, the air pipe is tilted, and the tilt angle of the air pipe is limited by the distance between the upper mold 11 and the lower mold 12, resulting in a blind spot for blowing away the corner of the bearing surface 121 of the lower mold 12 near the operator, where the sealant 13 is difficult to remove. Figure 2 As shown, when the molding compound 14 is placed on the bearing surface 121 of the lower mold 12, the molding compound comes into contact with the residual molding compound 13. Figure 3 As shown, when the cutting tool of the upper mold 11 punches the molding structure 14, the part of the molding structure 14 in contact with the molding compound 13 will crack, affecting the yield of the molding structure.

[0021] To address the aforementioned problems, this application provides an air hose for an air gun. The air hose is a rigid tube. Figure 4 and Figure 5 As shown, the air blowing pipe 20 includes a main pipe section 21, a branch pipe section 22, and a baffle 23.

[0022] The main pipe section 21 includes a first air inlet 211, a first air outlet 212, and an opening 213 located between the first air inlet 211 and the first air outlet 212. The opening 213 is disposed on the side wall of the main pipe section 21. The branch pipe section 22 includes a second air inlet 221 and a second air outlet 222. The second air inlet 221 communicates with the opening 213. The orthographic projection of the second air outlet 222 on the main pipe section 21 is located on the side of the opening 213 away from the first air outlet 212, or at least partially overlaps with the opening 213. The baffle 23 includes a blocking portion 231 located within the main pipe section 21; the blocking portion 231 is located on the side of the opening 213 facing the first air outlet 212; the blocking portion 231 includes a first end 2311 and a second end 2312 opposite to each other, the first end 2311 being away from the opening 213 and having a gap with the inner surface of the main pipe section 21, and the second end 2312 being close to the opening 213 and having no gap with the inner surface of the main pipe section 21.

[0023] The air pipe for an air gun provided in this application embodiment has a blocking part 231 located within the main pipe section 21. The first end 2311 of the blocking part 231 is away from the opening 213 and has a gap with the inner surface of the main pipe section 21, while the second end 2312 is close to the opening 213 and has no gap with the inner surface of the main pipe section 21. Thus, the gas entering the main pipe section 21 through the first air inlet 211 can pass through the gap between the first end 2311 of the blocking part 231 and the inner surface of the main pipe section 21 to the first air outlet 212. Gas flows out of port 212, while another portion of the gas is blocked by the blocking part 231 and flows to the branch pipe section 22, eventually flowing out through the second air outlet 222 of the branch pipe section 22; that is, the gas in the blowing pipe can simultaneously flow out through the first air outlet 212 of the main pipe section 21 and the second air outlet 222 of the branch pipe section 22 to purge the bearing surface 121 of the lower mold 12; since the orthographic projection of the second air outlet 222 of the branch pipe section 22 on the main pipe section 21 is located on the side of the opening 213 away from the first air outlet 212, or at least partially overlaps with the opening 213, then as Figure 6 As shown, the gas blown from the second air outlet 222 can clean the plastic sealant 13 at the corner of the bearing surface 121 of the lower mold 12 near the operator, removing the plastic sealant 13 from that corner; the gas blown from the first air outlet 212 of the main pipe section 21 can clean the non-edge areas and other corners of the lower mold 12, removing the plastic sealant 13. It can be seen that the air blowing pipe provided in this embodiment allows the air blowing gun to clean the plastic sealant 13 from the bearing surface 121 of the lower mold 12, preventing the plastic sealant 13 residue from causing cracking of the plastic sealant structure when the upper mold 11's cutting tool punches it, thus improving the yield of the plastic sealant structure.

[0024] In one embodiment, such as Figure 5 As shown, the baffle 23 also includes a connecting portion 232 connected to the blocking portion 231. The connecting portion 232 is located inside the branch pipe section 22, and the inner surface of the branch pipe section 22 is welded. This configuration, where the connecting portion 232 of the baffle 23 is welded to the branch pipe section 22, achieves the connection between the blocking portion 231 and the branch pipe section 22. Compared to directly connecting the blocking portion 231 to the main pipe section 21 or the branch pipe section 22, this reduces the difficulty of the manufacturing process.

[0025] Furthermore, the maximum width of the baffle 23 is smaller than the maximum width of the opening 213 and the maximum width of the branch pipe section 22, and the surface of the connecting part 232 is in contact with the inner surface of the branch pipe section 22. The maximum width of the branch pipe section 22 refers to the maximum width of the cross-section of the branch pipe section 22 perpendicular to its axis. With this configuration, the baffle 23 can enter the branch pipe section 22 through the second air outlet 222, and the blocking part 231 can enter the main pipe section 21 through the opening 213. Then, the connecting part 232 of the baffle 23 is welded to the branch pipe section 22, facilitating the connection between the blocking part 231 and the branch pipe section 22. The baffle 23 can be an arc-shaped plate.

[0026] In one embodiment, the extending directions of the blocking portion 231 and the connecting portion 232 of the baffle 23 are the same, and the extending direction of the connecting portion 232 is the same as the extending direction of the branch pipe section 22. Therefore, the angle between the extending direction of the blocking portion 231 and the extending direction of the main pipe section 21 is the same as the angle between the extending direction of the branch pipe section 22 and the extending direction of the main pipe section 21.

[0027] In this embodiment of the application, when the orthographic projection of the second air outlet 222 on the main pipe section 21 is located on the side of the opening 213 away from the first air outlet 212, the angle between the axis of the main pipe section 21 and the axis of the branch pipe section 22 is an obtuse angle; when the orthographic projection of the second air outlet 222 on the main pipe section 21 at least partially overlaps with the opening 213, the angle between the axis of the main pipe section 21 and the axis of the branch pipe section 22 is basically a right angle.

[0028] In one embodiment, such as Figure 5As shown, the angle between the axis of the main pipe section 21 and the axis of the branch pipe section 22 is α, and the range of α is 30°~60°. This setting avoids α being too small or too large, which would result in less gas from the second air outlet 222 of the branch pipe section 22 reaching the corner of the support surface 121 of the second mold 12 near the operator, thus making the blowing effect of the air pipe on the plastic sealant of the support surface 121 of the second mold 12 near the operator poor. In some embodiments, α can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.

[0029] In one embodiment, the area of ​​the obstruction portion 231 projected onto a plane perpendicular to the axis of the main pipe section 21 is the first area, and the area of ​​the cross-section of the main pipe section 21 perpendicular to its axis is the second area. The ratio of the first area to the second area is less than one-half. The gas exiting from the first outlet 212 of the main pipe section 21 is used to purge most of the area of ​​the support surface 121 of the second mold 12. Therefore, the ratio of the first area to the second area is set to be less than one-half, so that most of the gas flows from the gap between the obstruction portion 231 and the inner surface of the main pipe section 21 to the first outlet 212 and exits through the first outlet 212, while a small portion of the gas is blocked by the obstruction portion 231 and flows into the branch pipe section 22 and exits through the second outlet 222.

[0030] Furthermore, the ratio of the first area to the second area is greater than or equal to one-third. This arrangement prevents insufficient gas flow from the second outlet 222 of the branch pipe section 22, which could result in poor blowing of the sealant at the corner of the support surface 121 of the second mold 12 near the operator. In some embodiments, the ratio of the first area to the second area is, for example, three-eighths or four-ninths.

[0031] In one embodiment, the area of ​​the cross-section perpendicular to its axis of the branch pipe section 22 is a third area, which is smaller than the second area. Since the ratio of the first area to the second area is less than one-half, most of the gas entering the main pipe section 21 flows through the gap between the blocking part 231 and the inner surface of the main pipe section 21 to the first outlet 212 and flows out through the first outlet 212. A small portion of the gas is blocked by the blocking part 231 and flows into the branch pipe section 22 and flows out through the second outlet 222. By setting the cross-sectional area of ​​the branch pipe section 22 perpendicular to its axis to be smaller than the cross-sectional area of ​​the main pipe section 21 perpendicular to its axis, the flow velocity of the gas flowing out from the first outlet 212 and the second outlet 222 can be larger, which is beneficial to improving the purging effect.

[0032] In one embodiment, the ratio of the third area to the second area is less than one-half. This arrangement ensures that the difference in gas velocity between the first outlet 212 and the second outlet 222 is small. By adjusting the gas velocity entering through the first inlet 211, the flow velocities of both the gas exiting the first outlet 212 and the gas exiting the second outlet 222 can be kept within a suitable range, thus guaranteeing the purging effect.

[0033] In one embodiment, such as Figure 4 As shown, the distance between the first air inlet 211 and the opening 213 is d1, and the distance between the first air outlet 212 and the opening 213 is d2, where d1 is greater than d2. This configuration, as... Figure 6 As shown, when the distance between the first air inlet 211 and the bearing surface 121 of the lower mold 12 is constant, the distance between the second air outlet 222 of the branch pipe section 22 and the bearing surface 121 of the lower mold 12 can also be made closer, so as to avoid the distance between the second air outlet 222 of the branch pipe section 22 and the bearing surface 121 of the lower mold 12 being too large, which would affect the blowing effect of the gas flowing out of the second air outlet 222 on the plastic sealant.

[0034] In one embodiment, the distance d2 between the first air outlet 212 and the opening 213 ranges from 8cm to 10cm. This arrangement ensures that the gas flowing from the second air outlet 222 effectively blows away the plastic sealant 13 at the corner of the bearing surface 121 of the lower mold 12 near the operator. In some embodiments, the distance d2 between the first air outlet 212 and the opening 213 can be 8cm, 8.5cm, 9cm, 9.5cm, 10cm, etc.

[0035] In one embodiment, such as Figure 5 As shown, the distance between the first air outlet 212 and the opening 213 is d2, and the maximum distance between the second air outlet 222 and the opening 213 is d3, where d2 is less than d3. That is, the distance between the first air outlet 212 and the opening 213 is less than the length of the branch pipe section 22. This arrangement allows for a smaller distance between the second air outlet 222 and the plastic sealant 13 at the corner of the lower mold 12's bearing surface 121 near the operator, further improving the blowing effect of the gas flowing from the second air outlet 222 on the plastic sealant 13 at the corner of the lower mold 12's bearing surface 121 near the operator. In some embodiments, the distance d2 between the first air outlet 212 and the opening 213 can be approximately 9cm, and the distance d3 between the second air outlet 222 and the opening 213 can be approximately 10cm.

[0036] In one embodiment, the air blowing pipe 20 may be made of stainless steel.

[0037] In one embodiment, the inner diameter of the main section 21 is approximately 5 cm.

[0038] This application provides an air gun, such as... Figure 4 As shown, the air gun includes a gun body 30 and an air pipe 20 as described in any of the above embodiments, and the air pipe 20 is connected to the gun body 30.

[0039] In one embodiment, such as Figure 4 As shown, the gun body 30 includes a main body 31 and an air inlet pipe 32 connected to the main body 31. The main body 31 has a gas channel inside, one end of which is connected to the air inlet pipe 32, and the other end is connected to the first air inlet 211 of the main pipe section 21. With this configuration, the gas entering through the air inlet pipe 32 can enter the main pipe section 21 through the gas channel.

[0040] In one embodiment, such as Figure 4 As shown, the gun body 30 also includes a handheld switch 33, which is located on the same side of the main pipe section 21 as the branch pipe section 22. When the user operates the air gun, the palm acts on the air inlet pipe 32, and the fingers other than the thumb grip the handheld switch 33 to control the flow and cut-off of gas in the gas channel. When the air gun is blowing the lower mold, the second air outlet 222 of the branch pipe section 22 faces downward. Since the handheld switch 33 and the branch pipe section 22 are located on the same side of the main pipe section 21, the handheld switch 33 also faces downward, meaning that the user's fingers holding the handheld switch 33 are below the palm, putting the user's hand in a more comfortable position and reducing fatigue.

[0041] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0042] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0043] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An air hose for an air gun, characterized in that, The air blowing tube is a rigid tube, and the air blowing tube includes: The main section includes a first air inlet, a first air outlet, and an opening located between the first air inlet and the first air outlet; The branch pipe section includes a second air inlet and a second air outlet. The second air inlet is in communication with the opening. The orthographic projection of the second air outlet on the main pipe section is located on the side of the opening away from the first air outlet or at least partially overlaps with the opening. A baffle includes a blocking portion located within the main pipe section; the blocking portion is located on the side of the opening facing the air outlet; the blocking portion includes a first end and a second end opposite to each other, the first end being away from the opening and having a gap between it and the inner surface of the main pipe section, and the second end being close to the opening and having no gap between it and the inner surface of the main pipe section.

2. The air tube for an air gun according to claim 1, characterized in that, The baffle also includes a connecting part connected to the blocking part; the connecting part is located inside the branch pipe section and is welded to the inner surface of the branch pipe section.

3. The air tube for an air gun according to claim 2, characterized in that, The maximum width of the baffle is less than the maximum width of the opening and the maximum width of the branch pipe section; the surface of the connecting part is in contact with the inner surface of the branch pipe section.

4. The air tube for an air gun according to claim 1, characterized in that, The area of ​​the obstruction portion projected onto a plane perpendicular to the axis of the main pipe section is the first area, and the area of ​​the section of the main pipe section perpendicular to its axis is the second area. The ratio of the first area to the second area is less than one-half.

5. The air tube for an air gun according to claim 4, characterized in that, The area of ​​the cross section perpendicular to the branch pipe segment is the third area, which is smaller than the second area.

6. The air tube for an air gun according to claim 4, characterized in that, The ratio of the first area to the second area is greater than or equal to one-third.

7. The air tube for an air gun according to claim 1, characterized in that, The angle between the axis of the main pipe section and the axis of the branch pipe section is in the range of 30° to 60°.

8. The air tube for an air gun according to claim 1, characterized in that, The distance between the first air inlet and the opening is greater than the distance between the first air outlet and the opening; and / or, The distance between the first air outlet and the opening is in the range of 8cm to 10cm; and / or, The distance between the first air outlet and the opening is less than the maximum distance between the second air outlet and the opening.

9. An air gun, characterized in that, The air gun includes a gun body and an air tube as described in any one of claims 1 to 8, wherein the air tube is connected to the gun body.

10. The air gun according to claim 9, characterized in that, The gun body includes a main body and a handheld switch located on one side of the main body. The handheld switch and the branch pipe section are located on the same side of the main pipe section.

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