Automatic proportioning coextrusion equipment for retort-resistant two-component polyurethane adhesive

Abstract

The utility model discloses an automatic proportioning co -extrusion equipment of double -component polyurethane adhesive of resistance to cooking, including storage unit, measurement unit, mixing unit and co -extrusion unit, and the storage unit contains the storage tank of stirring structure and component control device of area, can keep material even and monitor flow, measurement unit adopts high accuracy measuring pump to combine flow sensor and controller, realizes accurate proportioning, mixing unit drives stirring paddle mixture material through drive motor, belt drive mechanism, and the paddle can dismantle, and the inner wall of box has anti -sticky coating, co -extrusion unit utilizes temperature control system to control mould temperature, and guarantees co -extrusion process stability. This equipment has solved the low proportioning accuracy of existing, the poor mixing effect, the low degree of automation and the problem such as unstable co -extrusion, realizes accurate proportioning and high -efficient co -extrusion of double -component polyurethane adhesive of resistance to cooking, improves product quality and production efficiency, has good practicality and economic benefits.

Description

Technical Field

[0001] This utility model relates to the technical field of adhesive production equipment, specifically to an automatic proportioning and co-extrusion equipment for a two-component polyurethane adhesive that is resistant to boiling. Background Technology

[0002] Retort-resistant two-component polyurethane adhesives are widely used in food and pharmaceutical packaging, and their quality and performance have a significant impact on the safety and shelf life of packaged products. During production, the two-component polyurethane adhesives need to be mixed in precise proportions and then co-extruded.

[0003] However, existing co-extrusion equipment has many problems: 1. The metering system of existing co-extrusion equipment is not accurate enough, and there is a lack of precise flow monitoring and control methods, which makes it easy for the proportions of each component of the adhesive to deviate after mixing, and cannot meet the needs of fields such as food packaging and pharmaceutical packaging where the quality stability of adhesives is extremely important; 2. Traditional equipment relies on a lot of manual operation. From setting material proportioning parameters to monitoring equipment operation, manual participation is required. This is not only cumbersome to operate, but also prone to human error, resulting in low production efficiency and difficulty in achieving large-scale, continuous production; 3. The existing mixing unit has a simple structure and a single mixing method. The materials cannot be fully dispersed and uniformly mixed during the mixing process, which results in the adhesive components not being fully integrated, affecting the bonding performance and retort resistance of the final product.

[0004] Therefore, it is necessary to design an automated co-extrusion equipment for resistant two-component polyurethane adhesives to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide an automatic proportioning and co-extrusion equipment for a two-component polyurethane adhesive that is resistant to boiling and cooking, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An automated co-extrusion equipment for producing two-component polyurethane adhesives resistant to boiling and scalding includes: The storage unit includes a first component storage tank and a second component storage tank with a stirring structure. The first component storage tank and the second component storage tank are also respectively provided with a component feeding port and a component control device. The metering unit includes conveying pipelines connected to the first component storage tank and the second component storage tank respectively, and component metering pumps located on the respective conveying pipelines. The component metering pumps are all high-precision metering pumps used to accurately control the flow rate of materials in the storage unit. The mixing unit includes a mixing chamber and a mixing mechanism located inside the mixing chamber. A belt drive mechanism is also driven to one axial side of the mixing mechanism, and a drive motor is driven to the other side of the belt drive mechanism. The co-extrusion unit includes a co-extrusion die and a temperature control system. One side of the co-extrusion die is connected to multiple conveying pipelines for feeding materials. The temperature control system includes heating elements and temperature sensors for co-extruding materials and controlling the temperature during the co-extrusion process.

[0007] As a preferred embodiment of this utility model, the first component storage tank and the second component storage tank are further provided with a stirring structure. The stirring structure includes a stirring motor fixedly installed on the top of the first component storage tank and the second component storage tank. The bottom output end of the stirring motor is connected to a rotating shaft, and multiple stirring blades are arranged around the outer periphery of the rotating shaft.

[0008] As a preferred embodiment of this utility model, the mixing mechanism includes at least one set of stirring blades, which are disposed inside the mixing chamber and are used to stir and mix the materials entering the mixing chamber.

[0009] As a preferred embodiment of this utility model, the stirring blades are detachably connected and installed on the rotating shaft inside the mixing chamber, which facilitates the replacement of stirring blades of different specifications according to the material characteristics and mixing requirements.

[0010] As a preferred embodiment of this utility model, the inner wall of the mixing chamber is provided with an anti-stick coating to reduce the adhesion of materials to the inner wall of the mixing chamber, making it easier to clean and ensuring the mixing effect.

[0011] As a preferred embodiment of this utility model, the component control device includes a flow sensor and a controller. The flow sensor is installed on the conveying pipeline to monitor the material flow rate in real time. The controller is electrically connected to the flow sensor and the component metering pump respectively, and is used to control the flow rate of the component metering pump according to preset parameters.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In this invention, the automatic proportioning and co-extrusion equipment for a two-component polyurethane adhesive with a resistance to retort cooking achieves the following effects: 1. The metering unit of this equipment uses a high-precision component metering pump, which, together with a flow sensor, monitors the material conveying flow rate in real time. The controller precisely controls the flow rate according to preset proportioning parameters, enabling high-precision proportioning of the two components. This ensures accurate proportions of each component in the mixed adhesive, effectively improving product performance stability and meeting the stringent quality requirements of the high-end packaging industry. 2. The mixing mechanism inside the mixing chamber of the mixing unit, combined with a belt drive mechanism and a drive motor, allows the stirring blades to operate efficiently, thoroughly mixing the materials entering the mixing chamber. Furthermore, the stirring blades are detachable, facilitating the replacement of different specifications according to material characteristics. This further ensures uniform mixing under different working conditions, improving the adhesive's bonding strength and resistance to retort cooking. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a three-dimensional structural schematic diagram of the storage unit of this utility model; Figure 3 This is a three-dimensional structural diagram of the hybrid unit of this utility model.

[0014] In the diagram: 1. Storage unit; 2. Metering unit; 3. Mixing unit; 4. Co-extrusion unit; 12. First component storage tank; 13. Second component storage tank; 14. Component feed port; 15. Component control device; 16. Mixing structure; 161. Mixing motor; 162. Rotating shaft; 163. Mixing blade; 21. Conveying pipeline; 22. Component metering pump; 31. Mixing box; 32. Mixing mechanism; 33. Belt drive mechanism; 34. Drive motor; 41. Co-extrusion die. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0016] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0017] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] For examples, please refer to Figure 1-3 This utility model provides a technical solution: An automated co-extrusion equipment for producing two-component polyurethane adhesives resistant to boiling and scalding includes: The storage unit 1 includes a first component storage tank 12 and a second component storage tank 13 with a stirring structure 16. The first component storage tank 12 and the second component storage tank 13 are also respectively provided with a component feeding port 14 and a component control device 15. The first component and the second component of the retortable two-component polyurethane adhesive are added to the first component storage tank 12 and the second component storage tank 13 through the component feeding port 14, respectively. Metering unit 2 includes conveying pipelines 21 connected to the first component storage tank 12 and the second component storage tank 13 respectively, and component metering pumps 22 located on the respective conveying pipelines 21. The component metering pumps 22 are all high-precision metering pumps, used to accurately control the flow rate of materials in storage unit 1. The controller controls the operation of the component metering pumps 22 according to the preset mixing ratio parameters and the flow data fed back by the flow sensor, and accurately adjusts the flow rate of materials output from the first component storage tank 12 and the second component storage tank 13 through the conveying pipelines 21. The high-precision component metering pumps, combined with the flow sensor and the controller, realize the accurate metering and flow control of the two components, ensure the accurate material ratio before mixing, and improve the stability of adhesive performance. The mixing unit 3 includes a mixing chamber 31 and a mixing mechanism 32 located inside the mixing chamber 31. A belt drive mechanism 33 is also connected to one axial side of the mixing mechanism 32, and a drive motor 34 is connected to the other side of the belt drive mechanism 33. The mixing mechanism 32 thoroughly stirs the materials to ensure that the two components are evenly mixed. The anti-stick coating on the inner wall of the mixing chamber 31 reduces material adhesion, facilitates cleaning, ensures mixing effect, and improves adhesive quality. The co-extrusion unit 4 includes a co-extrusion die 41 and a temperature control system. Multiple conveying pipes 21 are connected to one side of the co-extrusion die 41 for feeding. The temperature control system includes heating elements and temperature sensors for co-extruding the material and controlling the temperature during the co-extrusion process. The uniformly mixed material enters the co-extrusion die 41 through the conveying pipes 21. The temperature sensors in the temperature control system monitor the temperature of the co-extrusion die in real time and provide feedback to the controller. The controller adjusts the power of the heating elements according to preset temperature parameters to control the temperature during the co-extrusion process. Precise temperature control ensures stable material performance during co-extrusion, guaranteeing the retortability and bonding effect of the retort-resistant two-component polyurethane adhesive, thereby improving product quality. Specifically, the first component storage tank 12 and the second component storage tank 13 are also equipped with a stirring structure 16. The stirring structure 16 includes a stirring motor 161 fixedly installed on the top of the first component storage tank 12 and the second component storage tank 13. The bottom output end of the stirring motor 161 is connected to a rotating shaft 162, and multiple stirring blades 163 are arranged around the rotating shaft 162. When the stirring motor 161 is turned on, it drives the rotating shaft 162 and the stirring blades 163 to rotate, stirring the material in the tank. The flow sensor in the component control device 15 monitors the material flow rate of the conveying pipeline 21 in real time. The stirring structure keeps the material in the tank uniform, avoids sedimentation and stratification, and ensures the consistency of the material.

[0020] Specifically, the mixing mechanism 32 includes at least one set of stirring blades, which are disposed inside the mixing chamber 31 for stirring and mixing the materials entering the mixing chamber 31; the materials precisely proportioned by the metering unit enter the mixing chamber 31, and the drive motor 34 drives the stirring blades of the mixing mechanism 32 to rotate through the belt transmission mechanism 33 to stir and mix the materials. The stirring blades are detachably connected and installed on the rotating shaft inside the mixing chamber 31, making it convenient to replace stirring blades of different specifications according to the material characteristics and mixing requirements. The inner wall of the mixing chamber 31 is provided with an anti-stick coating to reduce the adhesion of materials to the inner wall of the mixing chamber 31, making it easier to clean and ensuring the mixing effect.

[0021] Specifically, the component control device 15 includes a flow sensor and a controller. The flow sensor is installed on the conveying pipeline 21 to monitor the material flow in real time. The controller is electrically connected to the flow sensor and the component metering pump 22 respectively, and is used to control the flow of the component metering pump 22 according to preset parameters.

[0022] The working process of this utility model is as follows: When using the automatic proportioning and co-extrusion equipment for the retortable two-component polyurethane adhesive, the first and second components of the retortable two-component polyurethane adhesive are first added to the first component storage tank 12 and the second component storage tank 13 through the component feeding port 14, respectively. The stirring structure 16 and stirring motor 161 in the storage unit 1 are started, driving the rotating shaft 162 and stirring blade 163 to rotate, continuously stirring the material to avoid sedimentation and stratification. At the same time, the flow sensor in the component control device 15 monitors the material flow status of the conveying pipeline 21 in real time. The controller in the metering unit 2, based on the preset proportioning parameters and combined with the real-time flow data fed back by the flow sensor, accurately controls the operation of the component metering pump 22. By adjusting the component metering pump 22, the flow rate of the material output from the first component storage tank 12 and the second component storage tank 13 through the conveying pipeline 21 is accurately controlled to achieve the accurate proportioning of components A and B. The material after being accurately proportioned by the metering unit 2 enters the mixing chamber 31 of the mixing unit 3. The drive motor 34 drives the mixing blades of the mixing mechanism 32 to rotate at high speed via the belt drive mechanism 33, thoroughly mixing the materials. During the mixing process, the mixing blades can be detached from the rotating shaft inside the mixing chamber 31 according to the material characteristics and actual mixing requirements, and replaced with different specifications of mixing blades to achieve the best mixing effect. In addition, the anti-stick coating on the inner wall of the mixing chamber 31 effectively reduces the adhesion of materials to the inner wall of the chamber, which is convenient for cleaning and ensures uniform mixing of materials. The uniformly mixed materials are conveyed to the co-extrusion die 41 of the co-extrusion unit 4 through the conveying pipeline 21. During the co-extrusion process, the temperature sensor in the temperature control system monitors the temperature of the co-extrusion die in real time and feeds the temperature data back to the controller. The controller automatically adjusts the power of the heating element according to the preset temperature parameters to achieve precise control of the co-extrusion die temperature, ensuring that the material maintains stable performance during the co-extrusion process, and ultimately producing a qualified retortable two-component polyurethane adhesive product.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic proportioning and co-extrusion equipment for a two-component polyurethane adhesive resistant to boiling, characterized in that, include: The storage unit (1) includes a first component storage tank (12) with a stirring structure (16) and a second component storage tank (13). The first component storage tank (12) and the second component storage tank (13) are also respectively provided with a component feeding port (14) and a component control device (15). The metering unit (2) includes a conveying pipeline (21) connected to the first component storage tank (12) and the second component storage tank (13) respectively, and a component metering pump (22) located on each of the conveying pipelines (21). The component metering pumps (22) are all high-precision metering pumps used to accurately control the flow rate of the material in the storage unit (1). The mixing unit (3) includes a mixing box (31) and a mixing mechanism (32) located inside the mixing box (31). The mixing mechanism (32) is also connected to a belt drive mechanism (33) on one axial side, and a drive motor (34) is connected to the other side of the belt drive mechanism (33). The co-extrusion unit (4) includes a co-extrusion die (41) and a temperature control system. One side of the co-extrusion die (41) is connected to multiple conveying pipelines (21) for feeding. The temperature control system includes heating elements and temperature sensors for co-extruding materials and controlling the temperature of the co-extrusion process.

2. The automatic proportioning and co-extrusion equipment for a retort-resistant two-component polyurethane adhesive according to claim 1, characterized in that: The first component storage tank (12) and the second component storage tank (13) are also provided with a stirring structure (16). The stirring structure (16) includes a stirring motor (161) fixedly installed on the top of the first component storage tank (12) and the second component storage tank (13). The bottom output end of the stirring motor (161) is connected to a rotating shaft (162). Multiple stirring blades (163) are arranged around the rotating shaft (162).

3. The automatic proportioning and co-extrusion equipment for a two-component, retortable polyurethane adhesive according to claim 1, characterized in that: The mixing mechanism (32) includes at least one set of stirring blades, which are disposed inside the mixing chamber (31) for stirring and mixing the materials entering the mixing chamber (31).

4. The automatic proportioning and co-extrusion equipment for the retort-resistant two-component polyurethane adhesive according to claim 3, characterized in that: The stirring blades are detachably connected and installed on the rotating shaft inside the mixing box (31), making it convenient to replace stirring blades of different specifications according to the material characteristics and mixing requirements.

5. The automatic proportioning and co-extrusion equipment for a retort-resistant two-component polyurethane adhesive according to claim 1, characterized in that: The inner wall of the mixing chamber (31) is provided with an anti-stick coating to reduce the adhesion of materials to the inner wall of the mixing chamber (31), making it easier to clean and ensuring the mixing effect.

6. The automatic proportioning and co-extrusion equipment for a retort-resistant two-component polyurethane adhesive according to claim 1, characterized in that: The component control device (15) includes a flow sensor and a controller. The flow sensor is installed on the conveying pipeline (21) to monitor the material flow in real time. The controller is electrically connected to the flow sensor and the component metering pump (22) respectively, and is used to control the flow of the component metering pump (22) according to preset parameters.

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