A feeding device and feeding method for filling silicon material

Abstract

The present invention provides a feeding device for filling silicon material, which is used for filling silicon material into a charging barrel, comprising a charging part and a plurality of feeding parts placed below the charging part and connected to the charging barrel, wherein the charging part can slide along its length direction and continuously and spacedly feed each of the feeding parts. The present invention also proposes a feeding method using the feeding device. The beneficial effects of the present invention are as follows: silicon material can be accurately dropped into the charging barrel, the filling efficiency is high and the filling quality is good, the connection and cooperation between the lower end surface of the charging part and the inner side of the feeding part is good, the risk of material falling can be effectively reduced, and the probability of silicon material being contaminated is also reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary components of single crystal pulling and charging equipment, and in particular relates to a feeding device and a feeding method for filling silicon material. Background Art

[0002] Before single crystal pulling, materials need to be loaded. In the past, materials were loaded manually, but manual loading has low efficiency, pollutes the environment, causes dust leakage, low silicon material utilization rate and poor operation safety. The existing automatic filling machine is designed, but due to the unreasonable structural design between the loading and unloading funnels, the materials are easily stuck during unloading, causing the silicon materials entering the funnel to overflow and scatter, resulting in low production efficiency and easy introduction of external impurities, which seriously restricts the production progress. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a feeding device and a feeding method for filling silicon materials, and a transition connection structure between an automatic filling machine and a charging barrel, which solves the technical problems in the prior art of easy material jamming and overflowing due to unreasonable structural design.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A feeding device for filling silicon material is used to fill silicon material into a filling barrel, comprising a loading part and a plurality of feeding parts placed below the loading part and connected to the filling barrel, wherein the loading part can slide along its length direction and feed each feeding part continuously and at intervals.

[0006] Furthermore, it comprises two symmetrical and spaced-apart unloading parts, the unloading parts are arranged side by side along the length direction of the charging part and each of the unloading parts is independently connected to the charging barrel.

[0007] Furthermore, the unloading part includes a funnel and a tray placed on the lower end surface of the funnel and connected to the funnel, wherein the cross-sectional area of ​​the upper end of the funnel is larger than the cross-sectional area of ​​the lower end; the tray is adapted to the upper end surface of the loading barrel; the upper end surface of the funnel is an inclined surface and is inclined toward one side adjacent to the unloading part.

[0008] Furthermore, the lower end surface of the funnel is placed in any semicircle of the tray, and the drop hole connecting the lower end surface of the funnel and the tray is a semicircular structure, and the diameter of the drop hole is parallel to the diameter of the tray and is arranged close to the center of the tray.

[0009] Furthermore, both side surfaces of the funnel in the length direction are arc-shaped surface structures protruding toward the center of the funnel.

[0010] Furthermore, the loading part includes a loading shell and a material head which is arranged in communication with the loading shell, wherein the material head is an inverted cone shell, and the large end surface of the material head is arranged close to one end of the loading shell, and the material head moves along the length direction of the loading shell.

[0011] Furthermore, the material head is built into the upper end surface of the material discharge portion, and the lower end surface of the material head is inclined relative to the outer side surface of the material discharge portion in the length direction of the material discharge portion.

[0012] A method for unloading materials from a filling machine adopts the unloading device as described above, and the steps include: when working, the loading part continuously and intermittently loads the loading barrels corresponding to each unloading part within a set time until all the loading barrels are filled with the silicon material, and then stops unloading.

[0013] Furthermore, each time the silicon material is filled, the charging part only charges two adjacent charging barrels.

[0014] Furthermore, the weight of the silicon material filled each time accounts for 8-15% of the weight of the silicon material in the filling barrel as a whole.

[0015] Compared with the prior art, by adopting the above technical solution, the silicon material can be accurately dropped into the charging barrel, the filling efficiency is high and the filling quality is good, and the connection and cooperation between the lower end surface of the charging part and the inner side of the discharge part are good, which can effectively reduce the risk of material falling and the probability of silicon material being contaminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a feeding device according to an embodiment of the present invention;

[0017] Figure 2 is a side view of a blanking portion according to an embodiment of the present invention;

[0018] Figure 3 is a top view of a blanking portion according to an embodiment of the present invention;

[0019] Figure 4 It is a bottom view of a blanking portion according to an embodiment of the present invention.

[0020] In the figure:

[0021] 100, loading part 110, loading shell 120, material head

[0022] 200, unloading part 210, funnel 220, tray

[0023] 230, extension tube 240, feed hole 300, loading barrel DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] This embodiment provides a feeding device for filling silicon material, such as Figure 1 As shown, the device for filling silicon material into the charging barrel 300 includes a charging portion 100 and a plurality of discharge portions 200 disposed directly below the charging portion 100 and connected to the charging barrel 300. The charging portion 100 can slide along its length direction and continuously and spacedly charge each discharge portion 200 so that each charging barrel 300 is filled with silicon material.

[0026] In this embodiment, the unloading device includes a loading part 100 and two symmetrical and spaced unloading parts 200, the unloading parts 200 are arranged side by side along the length direction of the loading part 100, and each unloading part 200 is independently connected to the charging barrel 300. One loading part 100 corresponds to two unloading parts 200, and the material head 120 for discharging silicon material in the loading part 100 can swing left and right along the length direction of the loading part 100 and continuously and spacedly load the two groups of unloading parts 200, which not only allows each group of unloading parts 200 to have enough buffer unloading time to avoid overflow, but also improves the loading efficiency and the utilization rate of the filling machine equipment.

[0027] Furthermore, the loading part 100 includes a loading shell 110 and a material head 120 which is arranged in communication with the loading shell 110. Silicon material is continuously conveyed into the loading shell 110 through a conveyor belt, and the silicon material is then poured into the funnel 210 in the unloading part 200 through the material head 120 and then enters the loading barrel 300. Among them, the loading shell 110 is a rectangular parallelepiped structure. In order to ensure that there is enough silicon material stored in the loading shell 110, the length of the loading shell 110 is not less than the distance between the outer sides of adjacent funnels 210; the material head 120 is an inverted cone shell, and the large end face of the material head 120 is arranged close to one end of the loading shell 110. The material head 120 can move left and right along the length direction of the loading shell 110, that is, a sliding track adapted to the material head 120 is arranged on the inner side of the loading shell 110. This matching mode is a common structure in the art, and the drawings are omitted here.

[0028] Furthermore, in order to ensure that the silicon material discharged from the material head 120 does not splash out of the funnel 210 and is completely poured into the loading barrel 300, it is required that the lower end surface of the material head 120 is built into the upper end surface of the funnel 210 in the discharge part 200, and the lower end surface of the material head 120 is inclined relative to the outer side surface of the funnel 210 in the length direction of the discharge part 200. That is, when loading into the loading barrel 300 on the left, the lower end of the material head 120 is tilted toward the outer side surface of the funnel 210. Since the height of the outer wall of the funnel 210 is greater than the height of the inner wall, the discharge port of the material head 120 can be close to the high end side of the funnel 210, which can not only prevent silicon powder dust and silicon material splashing, but also prevent the silicon material from directly falling vertically into the discharge hole 230 on the lower end surface of the funnel 210, indirectly increasing the distance that the silicon material circulates in the funnel 210, increasing the downward buffer time of the silicon material, ensuring that the silicon material is completely loaded into the loading barrel, and improving the silicon material filling effect.

[0029] like Figure 2 As shown, the discharge part 200 includes a funnel 210, a tray 220 placed on the lower end surface of the funnel 210 and connected to the funnel 210, and an extension tube 230 arranged below the tray 220. The extension tube 230 is arranged to communicate with the lower end surface of the funnel 210, that is, it is connected through a discharge hole 240 arranged on the tray 220, and the lower end surface of the funnel 210 is adapted to the drop hole 240, and the tray 220 is adapted to the upper end surface of the loading barrel 300.

[0030] Furthermore, in order to ensure that the material head 120 can swing left and right continuously without obstruction and fill the adjacent funnel 210, the upper end surface of the funnel 210 is an inclined surface and is tilted toward one side of the adjacent discharge part 200. In this embodiment, the upper end surface of the funnel 210 is circular or quadrilateral, and the lower end surface is circular or quadrilateral, that is, the upper end surface and the lower end surface of the funnel 210 can be both circular or both quadrilateral; or the upper end surface of the funnel 210 is circular and its lower end surface is quadrilateral; or the upper end surface of the funnel 210 is quadrilateral and its lower end surface is circular. Regardless of the shapes of the upper end surface and the lower end surface of the funnel 210, it must be ensured that the cross-sectional area of ​​the upper end surface is greater than the cross-sectional area of ​​the lower end surface, and the two funnels 210 are both adjacent and symmetrically arranged inverted frustum-shaped structures. At the same time, in order to ensure that the lower end surface of the funnel 210 is compatible with the drop hole 240, it is necessary to trim the inner side of the lower end surface of the funnel 210 so that the lower end surface of the funnel 210 is completely in contact and connected with the drop hole 240 without distinction, so that the silicon material can slide into the loading barrel 300 completely freely and unobstructed.

[0031] Preferably, both sides of the funnel 210 in the length direction are arc-shaped structures protruding toward the center of the funnel 210, which is more conducive to the falling of the silicon material and accelerates the downward falling of the silicon material. The circular tray 220 adapted to the upper port of the charging barrel 300 can not only support the placement of the funnel 210 but also adjust the position of the funnel 210 according to the placement of the silicon material in the charging barrel 300, so as to adjust the position of the silicon material falling into the charging barrel 300, which is convenient to adjust and does not affect the filling and unloading.

[0032] like Figure 3-4 As shown, the lower end surface of the funnel 210 is placed in any semicircle of the tray 220, and the lower end surface of the funnel 210 and the drop hole 240 connected to the tray 220 are semicircular structures, and the diameter of the drop hole 240 is parallel to the diameter of the tray 220 and is arranged close to the center of the tray 220. This is because the charging barrel 300 is a re-feeding device, and a pull shaft is arranged at its center. Therefore, a through hole is arranged in the center of the tray 220 to be penetrated by the pull shaft on the charging barrel 300, and the position of the funnel 210 must avoid the pull shaft, that is, the charging barrel 300 is filled in the semicircular ring of the tray 220, so the lower end surface of the funnel 210 is arranged in any semicircular ring of the tray 220.

[0033] A method for feeding a filling machine, using the feeding device as described above, comprises the following steps:

[0034] During operation, the loading section 100 continuously and intermittently loads materials into the loading barrels 300 corresponding to the unloading sections 200 within a set time until the loading barrels 300 are filled with silicon materials, and then stops loading.

[0035] S1: Specifically, each time the silicon material is filled, the loading section 100 only loads two adjacent loading barrels 300. Two loading barrels 300 of the same specification are selected and placed in parallel and spaced apart, and a lowering section 200 is provided on each loading barrel 300, and the funnels 210 in the two adjacent lowering sections 200 are arranged opposite to each other, that is, the lower inclined portions in the funnels 210 are arranged adjacent to each other, and the upper inclined portions in the funnels 210 are all arranged on one side of the outer wall.

[0036] S2: When unloading, the material head 120 is first moved to the hopper 210 corresponding to the loading barrel 300 at the left end to dock, and the lower end of the material head 120 is set to the long side of the funnel 210 on the left, and the silicon material in the loading shell 110 is controlled to pass through the material head 120 and the funnel 210 to fill a certain weight of silicon material into the loading barrel 300 on the left within a set time.

[0037] S3: After the loading is completed, the material head 120 is controlled to slide toward the right loading barrel 300 and dock with the funnel 210 corresponding to the right loading barrel 300, and the lower end of the material head 120 is arranged toward the long side of the right funnel 210; during the interval transfer period, the filling machine continues to store material in the charging shell 110, and after the position of the material head 120 is stable, the charging shell 110 can be opened to allow the silicon material to fall through the material head 120 into the funnel 210 and then flow into the right loading barrel 300.

[0038] S4: Re-adjust the material head 120 and return it to the position of the left loading barrel 300, repeat step S2, and continue to load the left loading barrel 300; re-adjust the material head 120 and move it to the position of the right loading barrel 300, repeat step S3, and continue to load the right loading barrel 300.

[0039] Steps S2 and S3 are repeated until the loading of the two loading barrels 300 is completed.

[0040] The weight of silicon material and the filling time are the same each time. Due to the limitation of the size of the discharge hole 240 in the funnel 210, the weight of silicon material filled each time accounts for 8-15% of the weight of the entire silicon material in the charging barrel 300. This is because if the weight of silicon material filled each time accounts for less than 8% of the weight of the entire silicon material in the charging barrel 300, the amount of silicon material discharged each time is small, and more reciprocating interval discharge is required, which makes the utilization rate of the discharge device low, and the discharge time needs to be extended, which indirectly increases the charging cost; if the weight of silicon material filled each time accounts for more than 15% of the weight of the entire silicon material in the charging barrel 300, it exceeds the carrying capacity of the funnel 210 adapted to the charging barrel 300. At the same time, due to the limited area of ​​the tray 220 adapted to the diameter of the charging barrel 300, the size of the discharge hole 240 is also limited. Excessive accumulation of silicon material will cause the discharge hole 240 to be stuck, which is not conducive to the falling of silicon material, thereby affecting the charging efficiency. Preferably, the weight of the silicon material filled each time accounts for 8-15% of the weight of the entire silicon material in the filling barrel 300, which not only solves the problem of material jamming, but also maximizes the utilization rate of the funnel 210 and saves filling time.

[0041] In this embodiment, the loading time can be set by oneself, and the height and weight of the silicon material need to be considered, which is not specifically limited here.

[0042] 1. The unloading device and unloading method proposed in the present invention can make the silicon material fall into the charging barrel accurately, with high filling efficiency and good filling quality. The connection and cooperation between the lower end surface of the charging part and the inner side of the unloading part are good, which can effectively reduce the risk of material falling and the probability of silicon material being contaminated.

[0043] 2. The material discharge part comprises two adjacent symmetrically arranged inverted frustum-shaped funnels, and the upper end surface of the funnel is an inclined structure and is inclined toward an adjacent side surface. This structure is conducive to the left and right loading of the material charging part and the unobstructed continuous swinging; at the same time, both side surfaces of the funnel in the length direction are arc-shaped surface structures convex toward the center of the funnel, which is more conducive to the falling of the silicon material and accelerates the downward fall of the silicon material.

[0044] 3. A circular tray matched with the port of the charging barrel is also provided on the lower end surface of the funnel, which can not only support the placement of the funnel but also adjust the position of the funnel according to the placement of the silicon material in the charging barrel, so as to adjust the position of the silicon material falling into the charging barrel. The adjustment is convenient and does not affect the filling and unloading.

[0045] 4. At the same time, the material head of the loading part can slide left and right along the length direction of the loading shell, that is, the length direction of the adjacent unloading part, and the lower end of the material head is an inverted cone-shaped structure, which can be completely embedded in the inner side of the hopper to prevent the silicon material from being scattered or splashed out, ensuring that the silicon material is completely loaded into the loading barrel.

[0046] 5. One loading part corresponds to two unloading parts and the loading part can swing left and right and continuously load materials to the two groups of unloading parts at intervals. This not only allows each group of unloading parts to have enough buffer unloading time to avoid overflow, but also improves the loading efficiency and the utilization rate of the filling machine equipment.

[0047] The above embodiments of the present invention are described in detail, and the contents are only preferred embodiments of the present invention, and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A feeding device for filling silicon material, used for filling silicon material into a filling barrel, characterized in that: It comprises a loading part and a plurality of unloading parts placed below the loading part and connected with the loading cylinder, wherein the loading part can slide along its length direction and load materials to each unloading part continuously and at intervals; The unloading part comprises a funnel and a tray placed on the lower end surface of the funnel and connected to the funnel, wherein the cross-sectional area of ​​the upper end of the funnel is larger than the cross-sectional area of ​​the lower end thereof; The lower end surface of the funnel is placed in any semicircle of the tray, and the drop hole connecting the lower end surface of the funnel and the tray is a semicircular structure; The loading part includes a loading shell and a material head intercommunication with the loading shell, wherein the material head is an inverted cone shell, and the large end face of the material head is arranged close to one end of the loading shell, and a sliding track adapted to the material head is arranged on the inner side of the loading shell, and the material head moves along the length direction of the loading shell; The tray is matched with the upper end surface of the charging barrel; the upper end surface of the funnel is an inclined surface and is inclined toward the side of the adjacent unloading part; The diameter of the drop hole is parallel to the diameter of the tray and is arranged close to the center of the tray; Both sides of the funnel in the length direction are arc-shaped surface structures protruding toward the center of the funnel.

2. A feeding device for filling silicon material according to claim 1, characterized in that: It comprises two symmetrical and spaced-apart unloading parts, which are arranged side by side along the length direction of the charging part and each of the unloading parts is independently connected to the charging barrel.

3. A feeding device for filling silicon material according to any one of claims 1-2, characterized in that: The material head is built into the upper end surface of the material discharge portion, and the lower end surface of the material head is inclined relative to the outer side surface of the material discharge portion in the length direction of the material discharge portion.

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