PP raw material extruder for polypropylene plastic processing

Abstract

The utility model relates to the technical field of plastic processing extruder, concretely relates to a raw material extruder for PP polypropylene plastic processing, include: bottom plate, extrusion subassembly, the extrusion subassembly includes the sleeve that sets up above the bottom plate, rotates and installs the feed shaft in the sleeve inner wall, mixes even subassembly, the mixing even subassembly includes the discharge head that sets up in the sleeve one end, fixedly installs the fixed sleeve in the discharge head, the fixed sleeve is surrounded and is provided with a plurality of extrusion plates, each fixedly installed separation rubber joint between the extrusion plate. The utility model drives a plurality of extrusion plates to circulate and slide and reset in the fixed sleeve through magnetic repulsion effect, carries out continuous, multidirectional extrusion and shearing to the molten polypropylene raw material, effectively breaks the mixed dead angle existing in traditional stirring, significantly improves the homogenization degree and plasticizing quality of material, thereby guarantees the consistency of final product on physical performance and appearance.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing extruder technology, specifically to a raw material extruder for PP polypropylene plastic processing. Background Technology

[0002] Polypropylene (PP) is a common thermoplastic plastic with good chemical stability, high heat resistance, low density, and excellent corrosion resistance. Extruders are one of the main pieces of equipment used to process thermoplastic plastics, especially suitable for the production of plastics such as polypropylene. Through an extruder, polypropylene granules can be heated, melted, and extruded through a die to form the desired plastic products. Taking the preheating device for a plastic extruder for cable production disclosed in patent CN219338521U as an example, this utility model relates to the field of cable production technology and proposes a preheating device for a plastic extruder for cable production. It facilitates the cleaning of the inner wall of the extrusion cylinder, prevents the plastic from drying and solidifying on the inner wall of the extrusion cylinder, and affects subsequent use, thereby improving the subsequent processing effect of the plastic. However, during the material melting and conveying process, due to uneven shear force distribution or structural design limitations, mixing dead zones are easily generated, resulting in uneven plasticization and low homogenization of the material, which in turn affects the physical properties and appearance consistency of the final product. At the same time, high-viscosity molten materials are prone to adhering to the inner wall of the barrel or near the discharge port, causing blockages. This not only requires frequent shutdowns for cleaning but also reduces the stability and production efficiency of continuous equipment operation. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, this utility model provides a raw material extruder for PP polypropylene plastic processing, which can effectively solve the problems of uneven shear force distribution or structural design limitations in existing technologies, which easily lead to mixing dead zones, resulting in uneven plasticization and low homogenization of materials.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a raw material extruder for processing PP polypropylene plastics, comprising: Base plate; An extrusion assembly, the extrusion assembly including a sleeve disposed above a base plate, wherein a material conveying shaft is rotatably mounted on the inner wall of the sleeve; A uniform mixing component includes a discharge head disposed at one end of a sleeve, a fixed sleeve fixedly installed inside the discharge head, a plurality of extrusion plates arranged in a circumferential array inside the fixed sleeve, a separating rubber joint fixedly installed between each of the extrusion plates, a partition fixedly installed between the separating rubber joint and the fixed sleeve, and the extrusion plates being driven to slide on the inner wall of the fixed sleeve.

[0005] Preferably, a vertical plate is symmetrically installed on the upper end face of the base plate, and the vertical plate is fixedly connected to the sleeve. The outer wall of the sleeve is connected to a feed hopper. A rotary drive component is fixedly installed at one end of the sleeve. The output end of the rotary drive component passes through the sleeve and is fixedly connected to the conveying shaft. A heating jacket is fixedly installed on the outer wall of the sleeve.

[0006] Preferably, a plurality of fixing plates are fixedly installed in a circumferential array on the inner wall of the fixing sleeve, a magnetic plate is fixedly installed on the outer wall of the extrusion plate, and a first spring is fixedly installed between the magnetic plate and the fixing plates.

[0007] Preferably, one end of the conveying shaft is fitted with an outer sleeve, and the outer wall of the outer sleeve is fitted with a magnet, which repels the magnetic sheet.

[0008] Preferably, one end of the fixed sleeve is circumferentially connected to multiple air inlet pipes, and a first one-way valve is fixedly installed on the inner wall of the air inlet pipe.

[0009] Preferably, one end of the fixed sleeve is circumferentially connected to multiple discharge pipes, a second one-way valve is fixedly installed on the inner wall of the discharge pipe, multiple sets of fixed plates are fixedly installed on the outer wall of the discharge head in a circumferential array, a rotating impact frame is rotatably installed inside the fixed plate, a base is fixedly installed on the outer wall of the discharge head inside the fixed plate, a second spring is fixedly installed between the base and the rotating impact frame, and one end of the rotating impact frame is in contact with the discharge pipe.

[0010] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. By driving multiple extrusion plates to circulate and reset within a fixed sleeve through magnetic repulsion, continuous and multi-directional extrusion and shearing are applied to the molten polypropylene raw material. This effectively breaks the mixing dead zone present in traditional mixing, significantly improves the homogenization degree and plasticization quality of the material, thereby ensuring the consistency of the final product in terms of physical properties and appearance. 2. By combining air pressure changes with a spring reset structure, the discharge head is automatically struck at high frequency during the sliding of the extrusion plate, which effectively prevents material adhesion and blockage, greatly reduces production interruptions and manual cleaning needs, and improves the stability and production efficiency of continuous equipment operation. It is especially suitable for long-term processing of high-viscosity raw materials. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the extrusion assembly of this utility model; Figure 3 This is a schematic diagram of the structure of the uniform mixing component of this utility model; Figure 4 This is a schematic diagram of the structure of the fixing plate of this utility model.

[0013] Reference numerals: 1. Base plate; 2. Extrusion assembly; 201. Vertical plate; 202. Sleeve; 203. Heating jacket; 204. Feed hopper; 205. Rotary drive component; 206. Conveying shaft; 3. Mixing and homogenizing assembly; 301. Discharge head; 302. Outer sleeve; 303. Magnet; 304. Fixing sleeve; 305. Fixing plate; 306. First spring; 307. Magnetic sheet; 308. Extrusion plate; 309. Partition plate; 310. Separating rubber joint; 311. Air inlet pipe; 312. First one-way valve; 313. Discharge pipe; 314. Fixing plate; 315. Rotating impact frame; 316. Second spring; 317. Base. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example: Refer to Figures 1 to 4 A raw material extruder for processing PP polypropylene plastics, comprising: Base plate 1; The extrusion assembly 2 includes a sleeve 202 disposed above the base plate 1, and a material conveying shaft 206 is rotatably mounted on the inner wall of the sleeve 202. The mixing uniform component 3 includes a discharge head 301 disposed at one end of the sleeve 202. A fixed sleeve 304 is fixedly installed inside the discharge head 301. Multiple extrusion plates 308 are arranged in a circumferential array inside the fixed sleeve 304. A separating rubber joint 310 is fixedly installed between each extrusion plate 308. A partition 309 is fixedly installed between the separating rubber joint 310 and the fixed sleeve 304. The extrusion plates 308 are driven to slide on the inner wall of the fixed sleeve 304.

[0017] Reference Figures 1 to 2 A vertical plate 201 is symmetrically installed on the upper end of the base plate 1. The vertical plate 201 is fixedly connected to the sleeve 202. The outer wall of the sleeve 202 is connected to the feed hopper 204. A rotary drive component 205 is fixedly installed at one end of the sleeve 202. The rotary drive component 205 uses an existing motor. The output end of the rotary drive component 205 passes through the sleeve 202 and is fixedly connected to the conveying shaft 206. A heating jacket 203 is fixedly installed on the outer wall of the sleeve 202. PP polypropylene plastic raw material enters the sleeve 202 through the feed hopper 204. The heating jacket 203 heats the sleeve 202 to melt the raw material. The rotary drive component 205 drives the conveying shaft 206 to rotate, conveying the molten plastic towards the discharge head 301.

[0018] Reference Figures 2 to 3 Multiple fixing plates 305 are fixedly installed in a circumferential array on the inner wall of the fixing sleeve 304, and a magnetic plate 307 is fixedly installed on the outer wall of the extrusion plate 308. A first spring 306 is fixedly installed between the magnetic plate 307 and the fixing plate 305.

[0019] Reference Figures 2 to 3 One end of the conveying shaft 206 is fitted with an outer sleeve 302, and a magnet 303 is embedded in the outer wall of the outer sleeve 302. The magnet 303 and the magnetic sheet 307 are magnetically repelled.

[0020] Reference Figures 2 to 3 One end of the fixed sleeve 304 is connected to a circumferential array of multiple air inlet pipes 311. A first one-way valve 312 is fixedly installed on the inner wall of the air inlet pipe 311. When the conveying shaft 206 rotates, it drives the outer sleeve 302 and the magnet 303 embedded on it to rotate synchronously. The magnet 303 and the magnetic sheet 307 on the extrusion plate 308 inside the fixed sleeve 304 repel each other, pushing the extrusion plate 308 to slide on the inner wall of the fixed sleeve 304 and compressing the first spring 306. During the sliding process, the extrusion plate 308 stretches the separating rubber joint 310 to realize multi-directional extrusion and shearing of the molten plastic.

[0021] Reference Figures 3 to 4One end of the fixed sleeve 304 is connected to a circumferential array of multiple discharge pipes 313. A second one-way valve is fixedly installed on the inner wall of the discharge pipe 313. A circumferential array of multiple fixed plates 314 is fixedly installed on the outer wall of the discharge head 301. A rotating impact frame 315 is rotatably installed inside the fixed plate 314. A base 317 is fixedly installed on the outer wall of the discharge head 301 and inside the fixed plate 314. A second spring 316 is fixedly installed between the base 317 and the rotating impact frame 315. One end of the rotating impact frame 315 is in contact with the discharge pipe 313. When the magnet 303 continues to rotate with the conveying shaft 206 and moves away from a certain magnetic piece 307, the compressed first spring 306 drives the extrusion plate 308 to reset and apply extrusion to the plastic again. Through the continuous rotation of the magnet 303, the multiple extrusion plates 308 slide and reset in a cycle, so as to achieve continuous and uniform extrusion of the plastic. During the sliding process of the extrusion plate 308, the air between the partition 309 and the fixed sleeve 304 is compressed. At this time, the first one-way valve 312 is closed and the second one-way valve is opened. The high-pressure air is discharged through the discharge pipe 313, which blows the rotating impact frame 315 to rotate and stretches the second spring 316. When other extrusion plates 308 slide, the original extrusion plate 308 is reset, and a negative pressure is formed between the partition 309 and the fixed sleeve 304. The first one-way valve 312 is opened, and external air is supplemented through the air inlet pipe 311. At the same time, the stretched second spring 316 drives the rotating impact frame 315 to reset and knock on the outer wall of the discharge head 301 to prevent material from sticking or blocking.

[0022] The working principle of this utility model is as follows: By placing PP polypropylene plastic into the feed hopper 204, the PP polypropylene plastic will flow from the feed hopper 204 into the sleeve 202. Opening the heating jacket 203 can heat the PP polypropylene plastic. Opening the rotary drive 205 can drive the conveying shaft 206 to rotate, driving the molten PP polypropylene plastic to move towards the discharge head 301. The PP polypropylene plastic will be squeezed into the fixed sleeve 304 within the discharge head 301. The rotating feed shaft 206 drives the outer sleeve 302 and the magnet 303 to rotate, causing the magnet 303 to repel the magnetic sheet 307. The magnetic sheet 307 drives the extrusion plate 308 to slide on the inner wall of the fixed sleeve 304 and compress the first spring 306. The sliding extrusion plate 308 stretches the separating rubber joint 310. After the outer sleeve 302 is driven to rotate the magnet 303, the compressed first spring 306 drives the magnetic sheet 307 and the extrusion plate 308 to extrude the PP polypropylene plastic. Therefore, after the outer sleeve 302 and the magnet 303 are continuously driven to rotate, the extrusion plate 308 will cyclically extrude the PP polypropylene plastic. When the extrusion plate 308 is driven to slide within the fixed sleeve 304, it compresses the air between the partition plate 309 and the fixed sleeve 304. At this time, the first one-way valve 312 closes and the second one-way valve opens, increasing the air pressure between the partition plate 309 and the fixed sleeve 304. This air pressure is then discharged outward through the discharge pipe 313 and the second one-way valve, causing the rotating impact frame 315 to rotate and stretching the second spring 316. When the remaining extrusion plates 308 are driven to slide within the fixed sleeve 304, the extrusion plate 308 that has already been driven to slide... 08 will be reset due to the setting of the first spring 306. The stretched second spring 316 will drive the rotating impact frame 315 to reset and strike the discharge head 301. At this time, the first one-way valve 312 is open and the second one-way valve is closed. Outside air re-enters between the partition plate 309 and the fixed sleeve 304 through the first one-way valve 312. Thus, when the set extrusion plate 308 is reciprocated and slides in the fixed sleeve 304, the set rotating impact frame 315 will continuously strike the discharge head 301 in a cycle.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A raw material extruder for processing PP polypropylene plastics, characterized in that, include: Base plate (1); The extrusion assembly (2) includes a sleeve (202) disposed above the base plate (1), and a feed shaft (206) is rotatably mounted on the inner wall of the sleeve (202). The mixing uniform component (3) includes a discharge head (301) disposed at one end of the sleeve (202), a fixed sleeve (304) fixedly installed inside the discharge head (301), a plurality of extrusion plates (308) arranged in a circumferential array inside the fixed sleeve (304), a separating rubber joint (310) fixedly installed between each of the extrusion plates (308), a partition plate (309) fixedly installed between the separating rubber joint (310) and the fixed sleeve (304), and the extrusion plates (308) being driven to slide on the inner wall of the fixed sleeve (304).

2. The raw material extruder for PP polypropylene plastic processing according to claim 1, characterized in that, A vertical plate (201) is symmetrically installed on the upper end of the base plate (1). The vertical plate (201) is fixedly connected to the sleeve (202). The outer wall of the sleeve (202) is connected to the feed hopper (204). A rotary drive (205) is fixedly installed at one end of the sleeve (202). The output end of the rotary drive (205) passes through the sleeve (202) and is fixedly connected to the conveying shaft (206). A heating jacket (203) is fixedly installed on the outer wall of the sleeve (202).

3. The raw material extruder for PP polypropylene plastic processing according to claim 2, characterized in that, The inner wall of the fixed sleeve (304) is fixedly mounted with a plurality of fixed plates (305) in a circumferential array, and the outer wall of the extrusion plate (308) is fixedly mounted with a magnetic plate (307). A first spring (306) is fixedly mounted between the magnetic plate (307) and the fixed plate (305).

4. The raw material extruder for PP polypropylene plastic processing according to claim 3, characterized in that, One end of the conveying shaft (206) is fitted with an outer sleeve (302), and the outer wall of the outer sleeve (302) is fitted with a magnet (303), which is magnetically repulsive to the magnetic sheet (307).

5. The raw material extruder for PP polypropylene plastic processing according to claim 4, characterized in that, One end of the fixed sleeve (304) is connected to a plurality of air inlet pipes (311) in a circumferential array, and a first one-way valve (312) is fixedly installed on the inner wall of the air inlet pipe (311).

6. The raw material extruder for PP polypropylene plastic processing according to claim 1, characterized in that, One end of the fixed sleeve (304) is connected to a plurality of discharge pipes (313) in a circumferential array. A second one-way valve is fixedly installed on the inner wall of the discharge pipe (313). A plurality of fixed plates (314) are fixedly installed in a circumferential array on the outer wall of the discharge head (301). A rotating impact frame (315) is rotatably installed inside the fixed plate (314). A base (317) is fixedly installed on the outer wall of the discharge head (301) and inside the fixed plate (314). A second spring (316) is fixedly installed between the base (317) and the rotating impact frame (315). One end of the rotating impact frame (315) is in contact with the discharge pipe (313).

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