A kind of raw material mixing device for preparing bacteriostatic flame-retardant polypropylene composite film and its raw material

Abstract

This invention discloses a mixing device for preparing antibacterial and flame-retardant polypropylene composite films and its raw materials, relating to the field of polymer materials technology. It includes: a mixing tank, a stirring mechanism disposed on the mixing tank for stirring the polypropylene composite film raw materials, and a conveying mechanism disposed on the mixing tank for conveying the bottom of the mixing tank away from the stirring mechanism. This mixing device for preparing antibacterial and flame-retardant polypropylene composite films utilizes the stirring action of the stirring blades of the stirring mechanism and the dispersing action of the spreading frame, along with the conveying mechanism to transport the raw materials from the bottom of the mixing tank to the stirring mechanism. This ensures that the raw materials are fully dispersed and mixed within the mixing tank, greatly improving the mixing uniformity and ensuring the stable quality and uniform performance of the prepared antibacterial and flame-retardant polypropylene composite film. The conveying mechanism also promptly transports the raw materials from the bottom of the mixing tank away from the stirring mechanism to the stirring mechanism, preventing the accumulation of raw materials at the bottom.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a device for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing apparatus. Background Technology

[0002] Polypropylene (PP), as a common polymer material, is characterized by its non-toxicity, low density, light weight, and excellent mechanical and electrical insulation properties. It is widely used in electronics, construction, textiles, decoration, machinery and other fields. However, in some applications with high hygiene requirements, such as food packaging and medical supplies, ordinary polypropylene films lack antibacterial properties and cannot meet the actual needs.

[0003] When preparing antibacterial and flame-retardant polypropylene composite films, it is necessary to thoroughly mix various raw materials to ensure that the final film has uniform antibacterial and flame-retardant properties. However, existing raw material mixing devices often have the problem of uneven mixing of raw materials during the mixing process. In particular, the raw materials located at the bottom of the mixing tank are difficult to fully participate in the mixing process, resulting in an imbalance of the raw material composition ratio in some areas, which in turn affects the quality and performance of the polypropylene composite film. Summary of the Invention

[0004] This invention provides a mixing device for preparing antibacterial and flame-retardant polypropylene composite films and its raw materials. Through the stirring action of the stirring blades of the stirring mechanism and the spreading action of the spreading frame, as well as the conveying mechanism, the raw materials at the bottom of the mixing tank are transported to the stirring mechanism. This allows the raw materials to be fully dispersed and mixed within the mixing tank, greatly improving the mixing uniformity and ensuring the stable quality and uniform performance of the prepared antibacterial and flame-retardant polypropylene composite film. The conveying mechanism can promptly transport raw materials from the bottom of the mixing tank away from the stirring mechanism to the stirring mechanism, avoiding accumulation of raw materials at the bottom. This allows all raw materials to quickly participate in the mixing process, improving mixing efficiency, shortening mixing time, and meeting the needs of large-scale production.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for preparing antibacterial and flame-retardant polypropylene composite films and a raw material mixing apparatus thereof, comprising: Mixing tank; A stirring mechanism, located on the mixing tank, is used to stir the polypropylene composite film raw material; The conveying mechanism, located on the mixing tank, is used to convey the bottom of the mixing tank away from the stirring mechanism.

[0006] Furthermore, the stirring mechanism includes a driving component, a dispensing frame, a stirring cylinder, multiple stirring blades, and multiple dispensing holes. The driving component is located on the top of the outer wall of the mixing tank. The dispensing frame is rotatably embedded in the top of the outer wall of the mixing tank. The stirring cylinder is fixedly embedded in the bottom of the inner wall of the dispensing frame. Each stirring blade is fixedly sleeved on the outer wall of the stirring cylinder. Each dispensing hole is equidistantly opened along the circumferential direction on the outer wall and bottom of the dispensing frame.

[0007] Furthermore, the driving component includes a servo motor, a pinion gear, and a large gear. The servo motor is bolted to the top of the outer wall of the mixing tank. The pinion gear is fixedly sleeved on the output end of the servo motor. The large gear is fixedly sleeved on the outer wall of the dispensing frame, and the large gear and the pinion gear mesh with each other.

[0008] Furthermore, the conveying mechanism includes a support, a conveying cylinder, multiple discharge holes, and a conveying component. The support is fixedly installed on the top of the outer wall of the mixing tank, the conveying cylinder is fixedly installed on the top of the outer wall of the support, each discharge hole is opened on the outer wall of the conveying cylinder, and the interior of each discharge hole is connected to the interior of the spreading frame. The conveying component is installed on the support.

[0009] Furthermore, the conveying component includes a conveying motor, a conveying shaft, and a spiral conveying blade. The conveying motor is bolted to the top of the outer wall of the bracket, the conveying shaft is fixedly disposed at the output end of the conveying motor, and the spiral conveying blade is fixedly sleeved on the outer wall of the conveying shaft, with the spiral conveying blade located on the inner wall of the conveying cylinder.

[0010] Furthermore, a protective cover is installed on the top of the outer wall of the mixing tank, and the protective cover wraps around the outer wall of the small gear and the large gear.

[0011] This invention provides a device for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing apparatus. It has the following beneficial effects: (1) The device for preparing antibacterial and flame-retardant polypropylene composite film and its raw material mixing device uses the stirring blades of the stirring mechanism and the spreading frame of the spreading frame, as well as the conveying mechanism to transport the raw materials at the bottom of the mixing tank to the stirring mechanism, so that the raw materials can be fully dispersed and mixed in the mixing tank, which greatly improves the mixing uniformity of the raw materials and ensures that the prepared antibacterial and flame-retardant polypropylene composite film has stable quality and uniform performance.

[0012] (2) The device for preparing antibacterial and flame-retardant polypropylene composite film and its raw material mixing device can promptly transport the raw materials at the bottom of the mixing tank away from the stirring mechanism to the stirring mechanism through the conveying mechanism, avoiding the accumulation of raw materials at the bottom, so that all raw materials can quickly participate in the mixing process, improving the mixing efficiency, shortening the mixing time, and meeting the needs of large-scale production. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the mixing tank of the present invention; Figure 3 This is a cross-sectional view of the stirring tank of the present invention; Figure 4 This is a cross-sectional view of the conveying cylinder of the present invention.

[0014] In the diagram: 1. Mixing tank; 2. Stirring mechanism; 201. Spreading frame; 202. Stirring drum; 203. Stirring blades; 204. Servo motor; 205. Pinion gear; 206. Gear; 207. Spreading hole; 3. Conveying mechanism; 301. Support; 302. Conveying drum; 303. Discharge hole; 304. Conveying motor; 305. Conveying shaft; 306. Spiral conveying blades; 4. Protective cover. Detailed Implementation

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

[0016] Please see Figure 1-4 This invention provides a technical solution: a device for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing apparatus, comprising: Mixing tank 1; A stirring mechanism 2 is installed on the mixing tank 1 and is used to stir the polypropylene composite film raw material. The conveying mechanism 3 is located on the mixing tank 1 and is used to convey the bottom of the mixing tank 1 away from the stirring mechanism 2.

[0017] In this implementation plan: the antibacterial and flame-retardant polypropylene composite film is composed of polypropylene, antibacterial agent, flame retardant, and inorganic nanofiller. The antibacterial agent is an antibacterial agent prepared by reacting natural phenolic antibacterial agent with allyl glycidyl ether modified silicone oil. The flame retardant is a halogen-free flame retardant. Polypropylene, antibacterial agent, flame retardant, and inorganic nanofiller are added to a raw material mixing device in a certain proportion for thorough mixing to ensure uniform dispersion of each component. The mixed raw material is then added to a twin-screw extruder for melt blending at a suitable temperature and screw speed, allowing the components to fully fuse in the molten state. The temperature setting of the twin-screw extruder can be adjusted according to the properties of the raw material. The melt-blended material... The material is pelletized by a pelletizer to obtain polypropylene resin masterbatch. The prepared polypropylene resin masterbatch is added to a casting machine and cast into a film at a certain temperature and speed to obtain an antibacterial and flame-retardant polypropylene composite film. The temperature setting of the casting machine can be adjusted according to the thickness and performance requirements of the film. The mixing tank 1 is the main container of the entire device, providing space for mixing the polypropylene composite film raw materials. Its structure is simple and can hold a certain amount of raw materials to meet the mixing requirements. The stirring mechanism 2 is set on the mixing tank 1 to stir the polypropylene composite film raw materials. The conveying mechanism 3 is also set on the mixing tank 1 and is responsible for conveying the raw materials at the bottom of the mixing tank 1 to the stirring mechanism 2.

[0018] Specifically, the stirring mechanism 2 includes a driving component, a dispensing frame 201, a stirring cylinder 202, multiple stirring blades 203, and multiple dispensing holes 207. The driving component is located on the top of the outer wall of the mixing tank 1. The dispensing frame 201 is rotatably embedded in the top of the outer wall of the mixing tank 1. The stirring cylinder 202 is fixedly embedded in the bottom of the inner wall of the dispensing frame 201. Each stirring blade 203 is fixedly sleeved on the outer wall of the stirring cylinder 202. Each dispensing hole 207 is equidistantly opened along the circumferential direction on the outer wall and bottom of the dispensing frame 201.

[0019] In this embodiment: the spreading frame 201 is driven to rotate by the driving component, and the stirring blades 203 on the stirring drum 202 stir the raw materials, so that the raw materials are fully mixed and the mixing efficiency is improved. During the stirring process, the raw materials conveyed to the spreading frame 201 by the conveying mechanism 3 can be evenly dispersed through the spreading holes 207, which increases the contact area between the raw materials and the stirring components and improves the mixing effect.

[0020] Specifically, the driving components include a servo motor 204, a pinion 205, and a gear 206. The servo motor 204 is bolted to the top of the outer wall of the mixing tank 1. The pinion 205 is fixedly sleeved on the output end of the servo motor 204. The gear 206 is fixedly sleeved on the outer wall of the dispensing frame 201, and the gear 206 meshes with the pinion 205.

[0021] In this embodiment, the servo motor 204 is selected as ECMA-C20604RS. This model has high precision and controllability, and can accurately adjust the speed and direction according to actual needs to provide power for the entire mixing process. The large gear 206 meshes with the small gear 205 to realize the transmission of power and the conversion of speed. This transmission method has the advantages of accurate transmission ratio, high efficiency and reliable operation. The servo motor 204 drives the small gear 205 to rotate, which in turn drives the large gear 206 to drive the spreading frame 201 to rotate on the mixing tank 1.

[0022] Specifically, the conveying mechanism 3 includes a support 301, a conveying cylinder 302, multiple discharge holes 303, and conveying components. The support 301 is fixedly installed on the top of the outer wall of the mixing tank 1, the conveying cylinder 302 is fixedly installed on the top of the outer wall of the support 301, each discharge hole 303 is opened on the outer wall of the conveying cylinder 302, and the interior of each discharge hole 303 is connected to the interior of the spreading frame 201. The conveying components are installed on the support 301.

[0023] In this embodiment: the support 301 provides support for the conveying cylinder 302 and the conveying components, ensuring the stability of the conveying mechanism 3. The conveying cylinder 302 serves as a channel for conveying raw materials, conveying the raw materials at the bottom of the mixing tank 1 to the distributing frame 201 through each discharge hole 303.

[0024] Specifically, the conveying components include a conveying motor 304, a conveying shaft 305, and a spiral conveying blade 306. The conveying motor 304 is bolted to the top of the outer wall of the bracket 301. The conveying shaft 305 is fixedly installed at the output end of the conveying motor 304. The spiral conveying blade 306 is fixedly sleeved on the outer wall of the conveying shaft 305 and is located on the inner wall of the conveying cylinder 302.

[0025] In this embodiment, the conveyor motor 304 is model Y2-90L-4. This model has moderate power and can meet the needs of raw material conveying. It can provide power for raw material conveying. When the conveyor motor 304 starts, it drives the conveyor shaft 305 and the spiral conveyor blades 306 to rotate, and conveys the raw material at the bottom of the mixing tank 1 to the conveyor cylinder 302 by spiral conveying. Then, it enters the spreading frame 201 through the discharge hole 303, realizing the circulation and mixing of raw materials and improving the uniformity of mixing.

[0026] Specifically, a protective cover 4 is installed on the top of the outer wall of the mixing tank 1, and the protective cover 4 wraps around the outer wall of the small gear 205 and the large gear 206.

[0027] In this embodiment, the protective cover 4 effectively prevents dust and debris from entering the drive components, protects the pinion 205 and gear 206 from damage, extends the service life of the device, and improves the safety of the device.

[0028] In operation, first connect the power supply and start the servo motor 204 and the conveyor motor 304. The servo motor 204 drives the pinion 205 to rotate. The pinion 205, through meshing with the large gear 206, drives the dispensing frame 201 to rotate, thereby causing the mixing drum 202 and the mixing blades 203 to start stirring the polypropylene composite film raw material in the mixing tank 1. The conveyor motor 304 drives the conveyor shaft 305 and the spiral conveyor blades 306 to rotate, conveying the raw material at the bottom of the mixing tank 1 to the conveyor drum 302 by spiral conveying. The raw material in the conveyor drum 302 is discharged through the discharge hole 303. The raw material enters the dispersing frame 201. As the dispersing frame 201 rotates, the raw material is evenly dispersed through the dispersing holes 207. At the same time, the stirring blades 203 further stir the dispersed raw material to ensure thorough mixing. The conveying mechanism 3 continuously conveys the raw material from the bottom of the mixing tank 1 to the stirring mechanism 2. The stirring mechanism 2 continuously stirs and disperses the raw material to achieve cyclic mixing until the desired mixing effect is achieved. After mixing is completed, the servo motor 204 and the conveying motor 304 are turned off, the device stops running, and the mixed polypropylene composite film raw material is taken out from the mixing tank 1.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for preparing antibacterial and flame-retardant polypropylene composite films and a raw material mixing apparatus thereof, characterized in that, include: Mixing tank (1); A stirring mechanism (2) is provided on the mixing tank (1) and is used to stir the polypropylene composite film raw material; The conveying mechanism (3) is located on the mixing tank (1) and is used to convey the bottom of the mixing tank (1) away from the stirring mechanism (2).

2. The apparatus for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing device according to claim 1, characterized in that: The stirring mechanism (2) includes a driving component, a dispensing frame (201), a stirring cylinder (202), multiple stirring blades (203) and multiple dispensing holes (207). The driving component is located on the top of the outer wall of the mixing tank (1). The dispensing frame (201) is rotatably embedded in the top of the outer wall of the mixing tank (1). The stirring cylinder (202) is fixedly embedded in the bottom of the inner wall of the dispensing frame (201). Each stirring blade (203) is fixedly sleeved on the outer wall of the stirring cylinder (202). Each dispensing hole (207) is equidistantly opened along the circumferential direction on the outer wall and bottom of the dispensing frame (201).

3. The apparatus for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing device according to claim 2, characterized in that: The driving components include a servo motor (204), a pinion (205), and a gear (206). The servo motor (204) is bolted to the top of the outer wall of the mixing tank (1). The pinion (205) is fixedly sleeved on the output end of the servo motor (204). The gear (206) is fixedly sleeved on the outer wall of the dispensing frame (201), and the gear (206) meshes with the pinion (205).

4. The apparatus for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing device according to claim 3, characterized in that: The conveying mechanism (3) includes a support (301), a conveying cylinder (302), multiple discharge holes (303) and a conveying component. The support (301) is fixedly installed on the top of the outer wall of the mixing tank (1). The conveying cylinder (302) is fixedly installed on the top of the outer wall of the support (301). Each discharge hole (303) is opened on the outer wall of the conveying cylinder (302), and the interior of each discharge hole (303) is connected to the interior of the spreading frame (201). The conveying component is installed on the support (301).

5. The apparatus for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing device according to claim 4, characterized in that: The conveying component includes a conveying motor (304), a conveying shaft (305), and a spiral conveying blade (306). The conveying motor (304) is bolted to the top of the outer wall of the bracket (301). The conveying shaft (305) is fixedly installed at the output end of the conveying motor (304). The spiral conveying blade (306) is fixedly sleeved on the outer wall of the conveying shaft (305) and is located on the inner wall of the conveying cylinder (302).

6. The apparatus for preparing antibacterial and flame-retardant polypropylene composite films and its raw material mixing device according to claim 5, characterized in that: The top of the outer wall of the mixing tank (1) is equipped with a protective cover (4), which wraps around the outer wall of the small gear (205) and the large gear (206).

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