Dispensing machine glue cylinder with warming and anti-sticking functions

Abstract

The utility model relates to dispensing machine glue jar technical field, especially point to a kind of dispensing machine glue jar with warming anti-sticking function.It is provided with such a dispensing machine glue jar with warming anti-sticking function in the utility model, including dispensing head, glue jar body, butt joint pipe, temperature insulation shell, heater, heating pipe, control module, limit frame, support ring one, scraper, drive assembly and stirring assembly, glue jar body bottom is connected and communicates with dispensing head, glue jar body top is connected and communicates with butt joint pipe, glue jar body outside is sleeved with temperature insulation shell, annular accommodating cavity is formed between the inner wall of temperature insulation shell and the outer wall of glue jar body.The precise temperature control (maximum 250 DEG C) of glue jar body is carried out by spiral coiled heating pipe, in combination with the heat preservation design of temperature insulation shell, significantly reduce heat loss, the design effectively melts high viscosity colloid, eliminates colloid solidification risk, ensure that glue solution continuously keep low viscosity fluidity, satisfy precision dispensing process demand.

Description

Technical Field

[0001] This utility model relates to the field of glue cylinder technology for dispensing machines, and in particular to a glue cylinder for dispensing machines with heating and anti-sticking function. Background Technology

[0002] In precision electronics manufacturing, semiconductor packaging, and medical device assembly, the dispensing process for high-viscosity adhesives (such as epoxy resins, silicone, and hot melt adhesives) is widely used. These adhesives often have extremely high viscosity and poor flowability at room temperature, making precise and stable dispensing difficult. To improve flowability, the industry commonly employs a heated glue tank solution, increasing the adhesive temperature to reduce its viscosity.

[0003] However, existing heated dispensing cylinders still have significant adhesive adhesion problems in practical applications, mainly in the following aspects:

[0004] 1. Inner Wall Adhesion and Carbonization: During the heating process, the colloid easily adheres to the inner wall of the dispensing cylinder due to temperature differences and material properties. Over time, the adhesive layer gradually thickens and becomes unevenly heated, leading to localized overheating and carbonization. Carbon deposits not only contaminate subsequent colloids, affecting dispensing quality and product yield (e.g., causing dispensing breaks or uneven dot size), but also clog the dispensing head, resulting in frequent equipment downtime for maintenance.

[0005] 2. Decreased thermal conductivity: The adhesive layer adhering to the inner wall forms a heat insulation layer, severely hindering the effective conduction of heat from the heating element (usually an external heating belt or a cylindrical heater) to the adhesive in the center of the dispensing cylinder. This not only wastes energy but also causes a significant temperature gradient inside the dispensing cylinder. The adhesive in the central area has insufficient temperature and high viscosity, while the area near the cylinder wall may overheat and deteriorate, affecting the consistency and reliability of dispensing.

[0006] Therefore, developing a dispensing machine cylinder heating system that can actively and in real time prevent adhesive from adhering to the cylinder wall and effectively remove the adhering material is of urgent technical demand and important industrial application value for improving dispensing quality, reducing material waste, lowering maintenance costs, and improving equipment operation stability and production efficiency. Utility Model Content

[0007] In order to overcome the shortcomings mentioned in the background art, this utility model provides a glue cylinder for a dispensing machine with heating and anti-sticking function.

[0008] The technical solution is as follows: A dispensing machine cylinder with heating and anti-sticking function includes a dispensing head, a cylinder body, a connecting pipe, a heat insulation shell, a heater, a heating tube, a control module, a limit frame, a support ring, a scraper, a drive assembly, and a stirring assembly. The dispensing head is connected to the bottom of the cylinder body, and the connecting pipe is connected to the top of the cylinder body. A heat insulation shell is sleeved on the outside of the cylinder body, and an annular receiving cavity is formed between the inner wall of the heat insulation shell and the outer wall of the cylinder body. The heating tube is spirally coiled and tightly attached to the outer wall surface of the cylinder body, and is completely contained within the heat insulation shell. Inside the cavity between the insulating shell and the glue cylinder body, a heater is installed on the front side of the insulating shell. The heating leads at both ends of the heating tube pass through the insulating shell and extend to the outside, and are reliably electrically connected to the power output terminal of the heater. The control module is electrically connected to the heater and establishes a signal connection with the glue cylinder body. A limit frame is connected to the inside of the connecting tube. A support ring is rotatably connected to the bottom of the limit frame. Four scrapers are circumferentially spaced on the lower inner side of the support ring. The scrapers are in contact with the inner wall of the glue cylinder body. A stirring assembly is provided on the limit frame, and a drive assembly is provided on the glue cylinder body.

[0009] As an improvement to the above solution, the heating tube is spirally wound into an equidistant spiral structure, and the outer surface of the tube is covered with a thermally conductive silicone layer.

[0010] As an improvement to the above solution, the insulation shell is made of double-layer austenitic stainless steel plates, with aerogel insulation material filling the space between the two layers.

[0011] As an improvement to the above solution, the mixing assembly includes a second support ring and a mixing paddle. The second support ring is rotatably connected to the upper inner side of the limiting frame. The mixing paddle is installed at the center of the bottom of the second support ring. The mixing paddle rotates through the first support ring and extends to the center of the inside of the cylinder body.

[0012] As an improvement to the above solution, the drive assembly includes a gear ring, a servo motor, and a spur gear. Servo motors are installed on the left and right sides of the upper part of the cylinder body. The two servo motors are set at different heights in the vertical direction. A spur gear is coaxially connected to the output shaft of each servo motor. Gear rings are fixedly connected to the outer sides of support ring one and support ring two. The gear rings mesh with the spur gears at the same height.

[0013] As an improvement to the above solution, the inner wall surface of the cylinder body is sandblasted to form a micro-textured layer and covered with a silicon carbide (SiC) ceramic-based composite coating.

[0014] Beneficial effects: 1. The spiral-wound heating tube precisely controls the temperature of the glue cylinder (up to 250℃), and combined with the insulation design of the heat-insulating shell, significantly reduces heat loss. This design effectively melts high-viscosity colloids, eliminates the risk of colloid solidification, and ensures that the glue solution maintains low viscosity and fluidity, meeting the requirements of precision dispensing processes.

[0015] 2. Driven by the support ring, the scraper moves circumferentially along the cylinder wall to remove adhering adhesive in real time, completely solving the problem of adhesive carbonization on the wall. This mechanism not only avoids adhesive waste but also maintains the smoothness of the inner wall, ensuring the purity and long-term stability of the adhesive solution.

[0016] 3. The independently driven stirring paddle forcibly agitates the adhesive by rotation, breaking the thermal boundary layer and achieving uniform temperature distribution inside the colloid. Combined with the scraping action to eliminate wall thermal resistance, it significantly improves heating efficiency and avoids colloid deterioration caused by local overheating. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the dispensing head, dispensing cylinder body, and connecting pipe of this utility model.

[0019] Figure 3 This is a three-dimensional sectional view of the insulation shell, heater, and heating tube components of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the glue cylinder body, the limiting frame, and the support ring.

[0021] Figure 5 This is a three-dimensional sectional view of the components of this utility model, including the scraper rod, toothed ring, and servo motor.

[0022] Figure 6 This is a three-dimensional structural diagram of the spur gear, gear ring, and support ring components of this utility model.

[0023] Figure 7 This is a three-dimensional structural diagram of the spur gear, support ring II, and stirring paddle components of this utility model.

[0024] The following are the labels in the diagram: 1. Dispensing head, 2. Glue cylinder body, 3. Connecting pipe, 4. Insulation shell, 5. Heater, 6. Heating tube, 7. Control module, 8. Limiting frame, 9. Support ring one, 10. Scraper, 11. Gear ring, 12. Servo motor, 13. Spur gear, 14. Support ring two, 15. Stirring paddle. Detailed Implementation

[0025] Example: A glue cylinder for a dispensing machine with heating and anti-sticking function, such as... Figures 1-7As shown, the system includes a dispensing head 1, a dispensing cylinder body 2, a connecting pipe 3, a heat insulation shell 4, a heater 5, a heating tube 6, a control module 7, a limit frame 8, a support ring 9, a scraper 10, a drive assembly, and a stirring assembly. The bottom of the dispensing cylinder body 2 is connected to and connected to the dispensing head 1, and the top of the dispensing cylinder body 2 is connected to and connected to the connecting pipe 3 for connecting to the dispensing machine. A heat insulation shell 4 is coaxially sleeved on the outside of the dispensing cylinder body 2. The heat insulation shell 4 is made of double-layer austenitic stainless steel plates, with aerogel insulation material filled between the two layers to enhance the insulation effect. An annular cavity is formed between the inner wall of the heat insulation shell 4 and the outer wall of the dispensing cylinder body 2. The heating tube 6 is spirally coiled and tightly attached to the outer wall surface of the dispensing cylinder body 2, and is completely contained within the cavity between the heat insulation shell 4 and the dispensing cylinder body 2. The spiral coil of the heating tube 6 is an equidistant spiral structure with a pitch range of 5-15mm, and the outer surface of the tube is covered with a thermally conductive silicone layer to enhance the heat transfer efficiency with the outer wall of the dispensing cylinder body 2. A heater 5 is installed on the front side. The heating leads at both ends of the heating tube 6 pass through the insulation shell 4 and extend to the outside, reliably connecting to the power output terminal of the heater 5. The control module 7 establishes a control connection with the heater 5 via a signal cable and a signal connection with the glue cylinder body 2. The heater 5 integrates an operation panel for real-time display of operating data such as glue cylinder temperature, heater 5 status, and stirring / scraping status, and provides a human-machine interface for starting and stopping heating, stirring, and scraping functions. A limit frame 8 is connected to the inner side of the connecting tube 3. A support ring 9 is rotatably connected to the bottom of the limit frame 8. The support ring 9 maintains a small axial gap with the top port of the glue cylinder body 2. Four scraper rods 10 are circumferentially spaced on the lower inner side of the support ring 9. The scraper rods 10 are in contact with the inner wall surface of the glue cylinder body 2. A stirring component is provided on the limit frame 8, and a drive component is provided on the glue cylinder body 2. The inner wall surface of the glue cylinder body 2 is sandblasted to form a roughness Ra = 3.2-6.3μm. The micro-textured layer, covered with a silicon carbide (SiC) ceramic matrix composite coating, can reduce colloidal adhesion and enhance wear resistance and corrosion resistance.

[0026] like Figure 4 , Figure 5 and Figure 7 As shown, the stirring assembly includes a second support ring 14 and a stirring paddle 15. The second support ring 14 is rotatably connected to the upper inner side of the limiting frame 8. The stirring paddle 15 is installed at the center of the bottom of the second support ring 14. The stirring paddle 15 rotates through the first support ring 9 and extends to the center of the inside of the glue cylinder body 2.

[0027] like Figures 4-7As shown, the drive assembly includes a gear ring 11, a servo motor 12, and a spur gear 13. The servo motor 12 is bolted to both the left and right sides of the upper part of the cylinder body 2. The two servo motors 12 are set at different heights in the vertical direction. The output shafts of the servo motors 12 are coaxially connected to the spur gears 13. The outer sides of the support ring 11 and the support ring 2 14 are fixedly connected to the gear ring 11. The gear ring 11 meshes with the spur gear 13 at the same height.

[0028] The adhesive is pre-injected into the inner cavity of the glue cylinder body 2 via the connecting pipe 3. The entire device is then installed and fixed onto the dispensing machine body. Before or during dispensing operations, the heating function is activated via the operation panel on the heater 5. The control module 7 drives the heater 5 to work according to set parameters or a preset program. The heater 5 outputs electrical energy to the heating tube 6, which generates heat. This heat conduction provides controllable heating to the glue cylinder body 2 and the adhesive inside. The insulation shell 4 effectively prevents heat loss to the environment, improving thermal efficiency and maintaining temperature stability. The heating temperature range is 50-250℃, meeting the melting requirements of adhesives of different viscosities and achieving efficient anti-sticking and flow control. To optimize the uniformity of adhesive heating and prevent the adhesive from solidifying and carbonizing on the cylinder wall, commands can be sent via the operation panel to activate the stirring and scraping functions. Upon receiving the command, the control module 7 independently controls two servo motors 12 to start. The output shafts of the servo motors 12 rotate, driving the spur gears. The spur gear 13 rotates, driving the gear ring 11 to rotate. The gear ring 11 then drives the corresponding support ring 9 and support ring 14 to rotate, causing the scraper 10 and stirring paddle 15 to rotate as well. The stirring paddle 15 stirs the internal adhesive, forcing convection and significantly improving the uniformity of the internal temperature field, preventing local overheating or underheating. The scraper 10 scrapes the inner wall of the glue cylinder body 2 circumferentially, continuously removing the adhesive adhering to the inner wall, effectively eliminating wall adhesion, preventing prolonged carbonization of the adhesive, ensuring the purity and fluidity of the adhesive, and maintaining the cleanliness of the inner wall. Under the combined action of heating, stirring, and scraping, the adhesive maintains a suitable viscosity and good fluidity. The adhesive is pressured into the inner cavity of the glue cylinder body 2 by the dispensing system, and under pressure, it is precisely and stably output through the dispensing head 1 to complete the dispensing operation. After use, the stirring and scraping functions are turned off sequentially via the operation panel, and finally the heating function is turned off. The control module 7 then sequentially stops the operation of the servo motor 12 and the heater 5.

Claims

1. A glue cylinder for a dispensing machine with a heating and anti-sticking function, characterized in that, The system includes a dispensing nozzle (1), a glue cylinder body (2), a connecting pipe (3), a heat insulation shell (4), a heater (5), a heating tube (6), a control module (7), a limiting frame (8), a support ring (9), a scraper (10), a drive assembly, and a stirring assembly. The bottom of the glue cylinder body (2) is connected to and connected to the dispensing nozzle (1), and the top of the glue cylinder body (2) is connected to and connected to the connecting pipe (3). The heat insulation shell (4) is fitted onto the outside of the glue cylinder body (2). An annular cavity is formed between the inner wall of the heat insulation shell (4) and the outer wall of the glue cylinder body (2). The heating tube (6) is spirally coiled and tightly attached to the outer wall surface of the glue cylinder body (2), and is completely contained within the heat insulation shell (4) and the glue cylinder body (2). Inside the cavity between the two, a heater (5) is installed on the front side of the heat insulation shell (4). The heating leads at both ends of the heating tube (6) pass through the heat insulation shell (4) and extend to the outside, and are reliably electrically connected to the power output terminal of the heater (5). The control module (7) is electrically connected to the heater (5) and establishes a signal connection with the glue cylinder body (2). A limit frame (8) is connected to the inside of the connecting tube (3). A support ring (9) is rotatably connected to the bottom of the limit frame (8). Four scrapers (10) are circumferentially connected to the lower part of the inner side of the support ring (9). The scrapers (10) are in contact with the inner wall of the glue cylinder body (2). A stirring assembly is provided on the limit frame (8), and a drive assembly is provided on the glue cylinder body (2).

2. The glue cylinder of a dispensing machine with heating and anti-sticking function as described in claim 1, characterized in that, The heating tube (6) is spirally wound in an equidistant spiral structure, and the outer surface of the tube is covered with a thermally conductive silicone layer.

3. The glue cylinder of a dispensing machine with heating and anti-sticking function as described in claim 2, characterized in that, The insulation shell (4) is made of double-layer austenitic stainless steel plates, with aerogel insulation material filling the space between the two layers.

4. The glue cylinder of a dispensing machine with heating and anti-sticking function as described in claim 3, characterized in that, The stirring assembly includes a second support ring (14) and a stirring paddle (15). The second support ring (14) is rotatably connected to the upper inner side of the limiting frame (8). The stirring paddle (15) is installed at the center of the bottom of the second support ring (14). The stirring paddle (15) rotates through the first support ring (9) and extends to the center of the inside of the glue cylinder body (2).

5. A dispensing machine cylinder with heating and anti-sticking function as described in claim 4, characterized in that, The drive assembly includes a gear ring (11), a servo motor (12), and a spur gear (13). The servo motor (12) is installed on the left and right sides of the upper part of the cylinder body (2). The two servo motors (12) are set at different heights in the vertical direction. The output shaft of the servo motor (12) is coaxially connected to the spur gear (13). The outer sides of the support ring one (9) and the support ring two (14) are fixedly connected to the gear ring (11). The gear ring (11) meshes with the spur gear (13) at the same height.

6. A dispensing machine cylinder with heating and anti-sticking function as described in claim 5, characterized in that, The inner wall surface of the cylinder body (2) is sandblasted to form a micro-textured layer and covered with a silicon carbide (SiC) ceramic-based composite coating.

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