Cylindrical silicon rod gluing device
By designing a multi-layered, tree-like dispensing head that dispenses adhesive synchronously with the workpiece rotation, the problems of low efficiency and weak adhesion in traditional adhesive application are solved. This achieves efficient and uniform silicone rod coating, improving production efficiency and bonding quality.
Patent Information
- Application Number
- CN202511248903.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-03
- Publication Date
- 2025-11-07
AI Technical Summary
Traditional adhesive application methods are inefficient, and the curing of the adhesive results in weak bonding and difficulty in removing air bubbles, which affects the quality of silicon rod splicing.
The dispensing head adopts a multi-layered, progressively branching tree-like flow channel with dispensing orifices arranged in a straight line. The dispensing head and the workpiece rotate relative to each other to achieve synchronous dispensing. The size of the dispensing orifice increases progressively to ensure uniformity.
It improves adhesive application efficiency, ensures uniform adhesive application, reduces bubble formation, enhances the adhesion of silicone rods, adapts to different splicing needs, and is easy to clean and maintain.
Smart Images
Figure CN120900894A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a silicon rod bonding technology, in particular to a cylindrical silicon rod glue coating device. BACKGROUND
[0002] During the cutting process of monocrystalline silicon rods, short silicon rods smaller than the single effective process length of the slicing machine are often produced due to material abnormalities and process needs, which reduces production efficiency, so the short silicon rods need to be glued and spliced to equal or as close as possible to the effective process length of the slicing machine.
[0003] In the traditional process, the glue is coated in a spiral manner, that is, the glue is applied to the end faces of the two silicon rods to be spliced by forming relative rotation between the slender cylindrical glue pipe and the silicon rod. At this time, the point of the glue pipe moves in a spiral shape on the circular plane. This method has a long duration and low production efficiency. In addition, since the glue itself will gradually solidify over time, this method is also prone to miss the best splicing opportunity, resulting in poor bonding between the silicon rods and thus quality defects in the product. In addition, after the silicon rods are coated with glue using the traditional process, the air inside the spiral line is difficult to escape, eventually forming air bubbles in the bonding surface, resulting in reduced bonding force. SUMMARY
[0004] The technical problem to be solved by the present application is to provide a cylindrical silicon rod glue coating device with short glue coating time, high efficiency and good effect.
[0005] To solve the above technical problems, the cylindrical silicon rod glue coating device of the present application comprises a glue injection pipe and a glue injection head arranged at the end of the glue injection pipe. The glue injection head has a tree-shaped flow channel with multiple layers of gradually diverging branches inside for the glue to pass through. The end of each branch of the tree-shaped flow channel has a glue injection port arranged in a straight line. The glue injection head realizes the glue coating operation through the relative rotation between the glue injection head and the workpiece to be coated and the synchronous glue injection of multiple circles of glue injection ports.
[0006] The size of each glue injection port gradually increases from close to the rotation center to far from the rotation center to ensure the uniformity of glue injection of the inner and outer circles.
[0007] The tree-shaped flow channel has a three-layer structure, including two first-level flow channels formed by dividing the end of the glue injection head into two parts, four second-level flow channels formed by dividing the end of each first-level flow channel into two parts, and eight third-level flow channels formed by dividing the end of each second-level flow channel into two parts. The glue injection ports are arranged at the end of each third-level flow channel.
[0008] The cross section of the glue injection port is gradually changing and the cross-sectional area is proportional to the distance from the center to the center of the working surface.
[0009] The cross section of the glue injection port is trapezoidal.
[0010] The glue injection head is made of nylon material with weak bonding force to glue.
[0011] The glue injection head is made of nylon material.
[0012] The glue injection pipe and the glue injection head are connected through a detachable structure.
[0013] The lower part of the glue injection pipe is provided with external threads, and the glue injection hole is provided with internal threads, and the glue injection pipe and the glue injection head are connected through threads.
[0014] The advantages of the present application are: (1) The glue injection head with multiple layers of stepped forked branches in the tree-shaped flow channel is installed at the end of the glue injection pipe, and the glue injection port is arranged in a straight line at the end of each branch flow channel. Compared with the traditional glue coating method, the workpiece needs to rotate multiple times, the glue coating time is long, the air in the inner circle of the spiral line is difficult to discharge, and the glue has sufficient time to react and solidify before bonding, resulting in a decrease in bonding force. The disadvantages of the traditional glue coating method are overcome by the relative rotation between the glue injection head and the workpiece to be coated and the multi-turn synchronous glue injection of the glue injection port to realize the glue coating operation, so that the workpiece only needs to rotate at most one turn to complete the glue coating operation, greatly improving the production efficiency. (2) The size of each glue injection port gradually increases from the center of rotation to the center of rotation, ensuring the uniformity of the glue coating. (3) The intermittent glue dispensing or continuous glue coating with higher production efficiency can be selected according to different splicing requirements, and the adaptability and flexibility are stronger. (4) The glue injection head is made of nylon material with weak bonding force to glue, which makes the glue flow more smoothly inside and makes the cleaning process easier. (5) The glue injection head is detachably screwed at the end of the glue injection pipe, which is more convenient for disassembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a schematic diagram of the traditional glue coating method; Figure 2 is a perspective view of embodiment one of the present application; Figure 3 is a cross-sectional view of the glue injection head of embodiment one of the present application; Figure 4 is a cross-sectional view of the glue injection port of embodiment one of the present application; Figure 5 is a use state diagram of embodiment one of the present application; Figure 6 is a use state diagram of embodiment two of the present application; Figure 7 is a use state diagram of embodiment three of the present application. Detailed Implementation
[0016] The cylindrical silicon rod coating apparatus of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0017] Example 1:
[0018] like Figure 2 As shown, the cylindrical silicone rod coating device of the present invention includes a dispensing tube 1 connected to a dispensing pump (not shown in the figure) and a dispensing head 2 connected to the dispensing tube 1. The dispensing head 2 is generally flat and rectangular, and is made of nylon material with weak adhesion to glue. It has a dispensing hole 5 at the top, and the dispensing hole 5 is provided with an internal thread. The end of the dispensing tube 1 is provided with an external thread. The dispensing head 2 is detachably screwed to the end of the dispensing tube 1 by the thread.
[0019] like Figure 3 As shown, the dispensing head 2 in this embodiment has a three-layered tree-like flow channel 3 for the glue to pass through. The tree-like flow channel 3 specifically includes two primary flow channels 6 formed by splitting the end of the dispensing hole 5, four secondary flow channels 7 formed by splitting the end of each primary flow channel 6, and eight tertiary flow channels 8 formed by splitting the end of each secondary flow channel 7. At the bottom of the dispensing head 2, at the end of each tertiary flow channel 8, there are glue inlets 4 arranged in a straight line for applying the glue passing through the tree-like flow channel 3 to the working surface.
[0020] like Figure 4 As shown, when the equipment is working, the dispensing head 2 is positioned along its length with one side close to the center of the working surface and the other side away. Following the order of proximity to the center of the working surface, the opening sizes of the eight dispensing ports 4 gradually increase, with a trapezoidal cross-section. The area covered by all eight dispensing ports 4 working simultaneously is fan-shaped to ensure uniform dispensing. The cross-sectional area of each dispensing port 4 is proportional to the distance from its center to the center of the working surface. This proportionality determines the size of each dispensing port 4, i.e., S1 / S2 = L1 / L2, where S1 is the cross-sectional area of the selected dispensing port one, S2 is the cross-sectional area of the selected dispensing port two, L1 is the distance from the center of dispensing port one to the center of the working surface, and L2 is the distance from the center of dispensing port two to the center of the working surface.
[0021] like Figure 5As shown, in use, under the action of the glue injection pump, glue is injected into the glue injection head 2 through the glue injection hole 5 via the glue injection pipe 1, and then enters each layer of the tree-shaped flow channel 3. Since the diameter and distance of each level of the flow channel are the same, the same pressure in a closed environment can make each glue injection port 4 synchronize glue output, and leave a fan-shaped glue trace on the glue coating surface of the workpiece to be coated as it rotates. In the traditional glue coating method, the workpiece needs to rotate multiple times, the glue coating time is long, the air in the inner circle of the spiral line is difficult to exhaust, the glue has sufficient time to react and solidify before bonding, resulting in a decrease in bonding force, and other disadvantages. The glue coating device of the embodiment synchronizes glue output in multiple places by controlling the amount of glue output, so that the workpiece only needs to rotate one circle to complete the glue coating operation, while ensuring uniformity of glue coating, greatly improving production efficiency. In addition, users can also choose intermittent glue dispensing with better air exhaust effect or continuous glue coating with higher production efficiency according to different splicing requirements, and the adaptability and flexibility are stronger. After the glue coating operation is completed, if the time interval to the next operation is long, which exceeds the glue solidification time, a solvent liquid can be injected into the glue path system for cleaning, and then clean water and high-pressure air are injected in turn to complete cleaning for subsequent use.
[0022] Embodiment Two:
[0023] As shown in Figure 6 , in actual production, the glue coating device array of embodiment one can also be used, that is, a shunt pipe is installed between the glue injection pump and the glue injection pipe 1, the shunt pipe with multiple branches is connected to the output end of the glue injection pump, and the glue injection pipe 1 of the glue coating device is connected to the end of each branch of the shunt pipe. The number of branches of the shunt pipe can be selected as two branches, three branches, four branches, etc. according to actual needs, so that the number of workpiece rotations required to complete the glue coating process is correspondingly reduced to one half, one third, one fourth, etc. An inclined surface is also opened on one side of each glue injection head 2 near the center of the work surface, so that interference between multiple glue injection heads 2 can be avoided while maximizing the glue coating range.
[0024] Embodiment Three:
[0025] As shown in Figure 7 , in actual production, the axis of the glue injection pipe 1 can also coincide with the workpiece rotation axis, the size of the glue injection head 2 can be increased, the number of flow channel layers of the tree-shaped flow channel 3 can be increased (from three layers to four layers), and the number of glue injection ports 4 can be increased (from eight to sixteen). At the same time, the glue injection ports 4 are changed to a symmetrical form along the center line of the glue injection head 2, that is, the size of the glue injection ports 4 near the center of the glue injection head 2 is the smallest, and the size of the glue injection ports 4 near the two ends of the glue injection head 2 is the largest. The embodiment can reduce the number of workpiece rotations required to complete the glue coating process to one half, while avoiding the problem of too long path of glue from the glue injection pump to the glue injection port 4 in embodiment two, thereby improving the utilization rate of glue and reducing glue residue.
[0026] Of course, the above description is not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the spirit and scope of the present application should also be included in the protection scope of the present application.
Claims
1. A cylindrical silicon rod gluing device, characterized by: The glue injection head (2) is internally provided with a tree-shaped flow channel (3) with multiple layers of step-by-step forked branches for glue to pass through, and the end of each branch of the tree-shaped flow channel (3) is provided with a glue injection port (4) arranged in a straight line; the glue injection head (2) realizes the glue coating operation through relative rotation between the glue injection head (2) and the workpiece to be coated and the multi-circle synchronous glue injection of the glue injection port (4).
2. The apparatus for coating a cylindrical silicon rod according to claim 1, wherein: The size of each glue injection port (4) gradually increases from close to the rotation center to far from the rotation center to ensure the uniformity of the inner and outer circle glue injection.
3. The apparatus for coating a cylindrical silicon rod according to claim 2, wherein: The tree-shaped flow channel (3) is a three-layer structure, including two first-level flow channels (6) formed by the glue injection hole (5) at the top of the glue injection head (2) being divided into two at the end, four second-level flow channels (7) formed by each first-level flow channel (6) being divided into two at the end, and eight third-level flow channels (8) formed by each second-level flow channel (7) being divided into two at the end; the glue injection port (4) is opened at the end of each third-level flow channel (8).
4. A cylindrical silicon rod gluing apparatus according to claim 1, 2 or 3, characterized in that: The cross section of the glue injection port (4) is a gradually changing shape, and the cross-sectional area is proportional to the distance from the center to the rotation center.
5. The apparatus for applying glue to a cylindrical silicon rod according to claim 4, wherein: The cross section of the glue injection port (4) is a trapezoidal shape.
6. The apparatus for gluing a cylindrical silicon rod according to claim 1, 2 or 3, characterized in that: The glue injection head (2) is made of a material with weak bonding force with glue.
7. The apparatus for coating a cylindrical silicon rod according to claim 6, wherein: The glue injection head (2) is made of nylon material.
8. The apparatus for gluing a cylindrical silicon rod according to claim 1, 2 or 3, wherein: The glue injection pipe (1) and the glue injection head (2) are connected through a detachable structure.
9. The apparatus for coating a cylindrical silicon rod according to claim 8, wherein: The lower part of the glue injection pipe (1) is provided with external threads, the glue injection hole (5) is provided with internal threads, and the glue injection pipe (1) and the glue injection head (2) are connected through threads.