Dispensing machine for high-viscosity adhesive

Abstract

The utility model relates to the technical field of dispensing equipment, in particular to a dispensing machine for high-viscosity adhesive, which comprises a mounting frame and a dispensing head mounted on the mounting frame, the dispensing head comprises an adhesive barrel, a heating barrel is fixedly sleeved on the outer side of the adhesive barrel, and a heating device is arranged on the heating barrel. A heat conduction oil filling cavity is formed between the inner side wall of the heating barrel and the outer side wall of the rubber barrel, and electric heating pieces are uniformly distributed on the inner side wall of the heating barrel; the heating cylinder is fixedly sleeved on the outer side of the rubber cylinder, the heat-conducting oil filling cavity is formed between the heating cylinder and the rubber cylinder, and the electric heating sheets which are uniformly distributed on the inner side wall are combined, so that a set of efficient and uniform heating system is constructed, the rubber cylinder is uniformly heated, and the phenomena that an adhesive close to a heating source is accelerated to age due to overheating and the adhesive performance is degraded are avoided; the problems that the temperature of the adhesive far away from the heating source rises slowly, and the viscosity cannot be reduced are solved, the adhesive dispensing amount and the drop size are effectively stabilized, the bonding precision of products is greatly improved, and the production quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of dispensing equipment technology, and more specifically to a dispensing machine for high-viscosity adhesives. Background Technology

[0002] In today's industrial manufacturing sector, high-viscosity adhesives play a crucial role, from the precision assembly of electronic devices and the accurate assembly of automotive parts to the high-end manufacturing of aerospace equipment. They are widely used in various critical connection points to ensure a secure bond between components, guaranteeing the overall performance and reliability of the product.

[0003] Traditional dispensing machines exhibit numerous serious problems when dealing with high-viscosity adhesives. At room temperature, the excessive viscosity and poor flowability of high-viscosity adhesives create significant obstacles when extruding from the cartridge, often leading to supply difficulties and hindering dispensing operations, severely impacting production efficiency. Some dispensing machines have incorporated heating methods. However, these conventional heating methods have several drawbacks. Firstly, the heating area is concentrated and singular, often only addressing a localized area of ​​the cartridge, failing to achieve comprehensive and uniform heating of the adhesive within. This results in a rapid temperature rise in the adhesive area near the heat source, and excessively high temperatures can cause abnormal changes in the adhesive's internal chemical bonds, accelerating its aging process and leading to a decline in adhesive performance. Conversely, the adhesive area farther from the heat source heats up slowly, remaining in a low-temperature, high-viscosity state for extended periods, making it difficult to achieve the ideal dispensing viscosity. Consequently, in actual dispensing processes, the viscosity differences between different parts of the adhesive are significant, directly causing highly unstable dispensing volume and droplet size, severely affecting the bonding accuracy of the product. Utility Model Content

[0004] The purpose of this invention is to provide a dispensing machine for high-viscosity adhesives, which can uniformly heat the glue cartridge, effectively stabilize the dispensing amount and drop size, and ensure production quality.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A dispensing machine for high-viscosity adhesives includes a mounting frame and a dispensing head mounted on the mounting frame. The dispensing head includes a glue tube, and a heating cylinder is fixedly sleeved on the outer side of the glue tube. A heat-conducting oil filling cavity is formed between the inner side wall of the heating cylinder and the outer side wall of the glue tube. Electric heating elements are uniformly distributed on the inner side wall of the heating cylinder.

[0007] Furthermore, the top of the heating cylinder is provided with an injection pipe that connects to the heat transfer oil filling cavity, and the bottom of the heating cylinder is provided with a drain pipe that connects to the heat transfer oil filling cavity. Both the injection pipe and the drain pipe are equipped with sealing caps.

[0008] Furthermore, a temperature sensor is installed on the inner wall of the heating cylinder.

[0009] Furthermore, the surface of the electric heating element is covered with a thermally conductive silicone layer.

[0010] Furthermore, a heat insulation layer is provided on the outer side of the heating cylinder.

[0011] Furthermore, the insulation layer is made of polyurethane foam material.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention constructs a highly efficient and uniform heating system by fixing a heating cylinder to the outside of the glue cartridge and forming a heat-conducting oil filling cavity between them, combined with evenly distributed electric heating elements on the inner wall. When the electric heating elements are working, heat is first transferred to the heat-conducting oil. The heat-conducting oil, with its excellent thermal conductivity, evenly distributes the heat throughout the filling cavity, thus heating the glue cartridge from all directions. This method overcomes the drawback of traditional dispensing machines where the heating element is concentrated and singular. It ensures that the high-viscosity adhesive in the glue cartridge is heated evenly, avoiding the problem of accelerated aging and decreased adhesion of the adhesive near the heating source, while the adhesive further away from the heating source heats up slowly and its viscosity does not decrease. This effectively stabilizes the dispensing volume and drop size, greatly improves the bonding accuracy of the product, and ensures production quality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] 1. Mounting bracket; 2. Glue sleeve; 3. Heating cylinder; 4. Heat transfer oil filling cavity; 5. Electric heating element; 6. Injection pipe; 7. Drain pipe; 8. Sealing cap; 9. Temperature sensor. Detailed Implementation

[0017] like Figure 1 and Figure 2 As shown, a dispensing machine for high-viscosity adhesives includes a mounting frame 1 and a dispensing head mounted on the mounting frame 1. The dispensing head includes a glue tube 2, and a heating cylinder 3 is fixedly sleeved on the outer side of the glue tube 2. A heat-conducting oil filling cavity 4 is formed between the inner side wall of the heating cylinder 3 and the outer side wall of the glue tube 2. Electric heating elements 5 are evenly distributed and installed on the inner side wall of the heating cylinder 3.

[0018] This invention constructs a highly efficient and uniform heating system by fixing a heating cylinder 3 to the outside of the glue cartridge 2, forming a heat-conducting oil filling cavity 4 between them, and combining this with electric heating elements 5 evenly distributed on the inner wall of the heating cylinder 3. When the electric heating elements 5 are working, heat is first transferred to the heat-conducting oil. The heat-conducting oil, with its excellent thermal conductivity, evenly distributes the heat throughout the entire heat-conducting oil filling cavity 4, thus heating the glue cartridge 2 from all directions. This method overcomes the drawback of traditional dispensing machines where the heating area is concentrated and singular. It ensures that the high-viscosity adhesive in the glue cartridge 2 is heated evenly, avoiding the problem of accelerated aging and decreased adhesion of the adhesive near the heating source, while the adhesive further away from the heating source heats up slowly and its viscosity does not decrease. This effectively stabilizes the dispensing volume and drop size, greatly improves the bonding accuracy of the product, and ensures production quality.

[0019] The top of the heating cylinder 3 is provided with an injection pipe 6 that connects to the heat transfer oil filling cavity 4, and the bottom of the heating cylinder 3 is provided with a drain pipe 7 that connects to the heat transfer oil filling cavity 4. Both the injection pipe 6 and the drain pipe 7 are equipped with sealing caps 8.

[0020] A temperature sensor 9 is installed on the inner wall of the heating cylinder 3; the temperature sensor 9 is used to monitor the temperature of the heat transfer oil in the heat transfer oil filling cavity 4.

[0021] The surface of the electric heating element 5 is covered with a thermally conductive silicone layer. Due to the excellent insulation properties of the thermally conductive silicone, it forms a safety barrier between the electric heating element 5 and the conductive medium of the heat transfer oil, effectively eliminating the risk of short circuits that may be caused by direct contact between the electric heating element 5 and the heat transfer oil. The thermally conductive silicone layer also prevents the heat transfer oil from corroding the surface of the electric heating element 5, greatly extending the service life of the electric heating element 5. The thermally conductive silicone layer also has excellent heat dissipation characteristics, which can evenly disperse the heat generated by the electric heating element 5 on its surface, preventing heat from accumulating in local areas of the electric heating element 5 and forming hot spots, making the heat transferred to the heat transfer oil more even, and promoting the heat transfer oil to be heated evenly throughout the entire heat transfer oil filling cavity 4.

[0022] The heating cylinder 3 is provided with a heat insulation layer on its outer side; the heat insulation layer is made of polyurethane foam material.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dispensing machine for high-viscosity adhesives, comprising a mounting frame (1) and a dispensing head mounted on the mounting frame (1), the dispensing head comprising a glue cartridge (2), characterized in that: A heating cylinder (3) is fixedly sleeved on the outside of the rubber cylinder (2). A heat-conducting oil filling cavity (4) is formed between the inner wall of the heating cylinder (3) and the outer wall of the rubber cylinder (2). Electric heating elements (5) are evenly distributed on the inner wall of the heating cylinder (3).

2. The dispensing machine for high-viscosity adhesives as described in claim 1, characterized in that: The top of the heating cylinder (3) is provided with an injection pipe (6) that connects to the heat transfer oil filling cavity (4), and the bottom of the heating cylinder (3) is provided with a drain pipe (7) that connects to the heat transfer oil filling cavity (4). Both the injection pipe (6) and the drain pipe (7) are equipped with sealing caps (8).

3. The dispensing machine for high-viscosity adhesives as described in claim 1, characterized in that: A temperature sensor (9) is installed on the inner wall of the heating cylinder (3).

4. The dispensing machine for high-viscosity adhesives as described in claim 1, characterized in that: The surface of the electric heating element (5) is covered with a thermally conductive silicone layer.

5. The dispensing machine for high-viscosity adhesives as described in claim 1, characterized in that: The heating cylinder (3) is provided with a heat insulation layer on its outer side.

6. The dispensing machine for high-viscosity adhesives as described in claim 5, characterized in that: The insulation layer is made of polyurethane foam.

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