Plastic extrusion granulator for full biodegradation

Abstract

The utility model relates to the technical field of plastic particle production, and particularly discloses a full-biodegradable plastic extrusion pelletizer which comprises a machine barrel and a feeding mechanism connected with the machine barrel, a screw rod is arranged in the machine barrel, a die head is arranged at the end part of the machine barrel, the screw rod comprises an input section, a conveying section and an output section, the input section is connected with the output section through the conveying sections, the conveying sections are detachably connected with the input section through bolts, the output section is detachably connected with the conveying sections through bolts, and the conveying sections are detachably connected with one another through bolts, and the input section is connected with a motor fixed outside the machine barrel; according to the utility model, the conventional integral screw rod is changed into a multi-section spliced structure, and when one section is damaged by abrasion, corrosion and the like, partial replacement can be carried out, so that the overall service life of the screw rod is prolonged, and the maintenance cost of the plastic extrusion granulator is reduced by improving the screw rod.

Description

Technical Field

[0001] This utility model relates to the field of plastic pellet production technology, specifically a fully biodegradable plastic extrusion granulator. Background Technology

[0002] Fully biodegradable plastics refer to a class of plastics that degrade due to the action of naturally occurring microorganisms such as bacteria, molds (fungi), and algae. Plastic extrusion granulators are the main equipment in production; they are devices that heat, plasticize, extrude, and cut plastic raw materials (such as granules, powders, or recycled materials) into pellets. They are key equipment in the plastics processing industry and are widely used in the production, recycling, and reuse of plastic products.

[0003] As a core component, the screw's performance directly impacts the equipment's production efficiency and product quality. The screw surface wears down due to long-term friction with plastic raw materials, especially when processing fillers (such as fiberglass and calcium carbonate). Furthermore, the screw surface may be corroded when processing certain corrosive plastics (such as PVC and halogen-containing materials). Wear or corrosion damage to the screw not only affects product quality but also reduces its overall service life. Currently, the screws in plastic extrusion granulators are integrated structures, such as the plastic extrusion granulator disclosed in patent CN210436429U. When localized wear or corrosion occurs, the entire screw must be replaced, increasing production costs. Utility Model Content

[0004] This invention addresses the aforementioned shortcomings of existing technologies by providing a fully biodegradable plastic extrusion granulator. It replaces the existing integral screw with a multi-section spliced ​​structure, allowing for partial replacement when one section suffers wear, corrosion, or other damage, thus extending the overall service life of the screw. This screw improvement reduces the maintenance costs of the plastic extrusion granulator.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A fully biodegradable plastic extrusion granulator includes a barrel and a feeding mechanism connected to the barrel. A screw is provided inside the barrel, and a die is provided at the end of the barrel. The screw includes an input section, a conveying section, and an output section. The input section is connected to the output section through the conveying section. There are multiple conveying sections. The conveying sections are detachably connected to the input section, the output section, and to each other by bolts. The input section is connected to a motor fixed outside the barrel.

[0007] Preferably, the rear ends of the input section and the transmission section are provided with drive holes, the front ends of the transmission section and the output section are provided with drive rods that cooperate with the drive holes, and the input section and the transmission section are provided with bolts for fixing the drive rods.

[0008] Preferably, the drive rod is connected to the transmission section or output section via a positioning frustum, and the ends of the input section and the transmission section are provided with positioning holes that cooperate with the positioning frustum.

[0009] Preferably, the side wall of the drive rod is provided with a fixing hole for engagement with a bolt.

[0010] Preferably, a sealing ring is installed at the end of the drive rod of the transmission section and the output section.

[0011] Preferably, the ends of the conveyor section and the output section are provided with positioning grooves for fixing sealing rings.

[0012] Preferably, the upper end of the fixing hole is provided with an inclined guide groove on the side away from the sealing ring, and the guide groove is engaged with the bolt.

[0013] Preferably, one end of the bolt-fixing drive rod has a round head.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model changes the existing integral screw to a multi-section spliced ​​structure. When one section is damaged by wear, corrosion or other damage, it can be replaced locally, which extends the overall service life of the screw. Through the improvement of the screw, the maintenance cost of the plastic extrusion granulator is reduced.

[0016] 2. The screw sections of this utility model are fixed together by a single bolt, making disassembly and assembly simple and quick. Through the cooperation between the drive rod and the drive hole, both the overall coaxiality and the synchronous rotation can be ensured, resulting in reliable and stable operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the screw structure;

[0019] Figure 3 This is a schematic diagram of the front end structure of the transfer section;

[0020] Figure 4 This is a schematic diagram of the rear structure of the transmission section;

[0021] Figure 5 This is a schematic diagram of the connection structure between transport sections;

[0022] Figure 6 This is a schematic diagram of the bolt structure;

[0023] In the diagram: 1-Feeding mechanism; 2-Barrel; 3-Screw; 31-Input section; 32-Transfer section; 321-Positioning groove; 322-Sealing ring; 323-Positioning frustum; 324-Fixing hole; 325-Drive rod; 326-Guide groove; 327-Drive hole; 328-Positioning hole; 329-Bolt hole; 33-Bolt; 331-Round head; 34-Output section. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown, a fully biodegradable plastic extrusion granulator includes a barrel 2, a feeding mechanism 1 connected to the barrel 2, a screw 3 inside the barrel 2, and a die head at the end of the barrel 2. Figure 2 As shown, the screw 3 includes an input section 31, a transmission section 32, and an output section 34, that is, the screw 3 is divided into multiple sections, each section containing two turns of helical blades. The input section 31 is connected to the output section 34 through the transmission section 32. There are multiple transmission sections 32. The transmission sections 32 are detachably connected to the input section 31, the output section 34, and to each other through bolts 33. The input section 31 is connected to a motor fixed outside the barrel 2.

[0026] like Figure 4 As shown, both the input section 31 and the transmission section 32 have drive holes 327 at their rear ends, and both the transmission section 32 and the output section 34 have drive rods 325 at their front ends that mate with the drive holes 327. Figure 5 As shown, both the input section 31 and the transmission section 32 are provided with bolts 33 for fixing the drive rod 325.

[0027] like Figure 3 As shown, the front ends of both the transmission section 32 and the output section 34 are connected to the drive rod 325 via a positioning frustum 323. The drive rod 325 is a non-circular rod. The ends of the input section 31 and the transmission section 32 are provided with positioning holes 328 that cooperate with the positioning frustum 323 to ensure the coaxiality of the input section 31, the transmission section 32 and the output section 34.

[0028] The input section 31 and the transmission section 32 have bolt holes 329 on their side walls that communicate with the drive hole 327. The bolt 33 is threaded into the bolt hole 329. The drive rod 325 has a fixing hole 324 on its side wall that mates with the bolt 33.

[0029] The transmission section 32 and the output section 34 are provided with a sealing ring 322 at one end of the drive rod 325, and the ends of the transmission section 32 and the output section 34 are provided with positioning grooves 321 for fixing the sealing ring 322.

[0030] To ensure a tight fit between sections, an inclined guide groove 326 is provided on the upper end of the fixing hole 324, away from the sealing ring 322. The guide groove 326 mates with the bolt 33, such as... Figure 6 As shown, one end of the bolt 33 that fixes the drive rod 325 has a round head 331. Due to the action of the sealing ring 322, after the drive rod 325 is installed into the drive hole 327, there will be misalignment between the fixing hole 324 and the bolt 33. Therefore, in order for the bolt 33 to be inserted into the fixing hole 324, the round head 331 of the bolt 33 will first cooperate with the guide groove 326. The round head 331 greatly reduces the friction. The round head 331 moves downward along the guide groove 326, which can push the drive rod 325 into the drive hole 327, thereby pressing the sealing ring 322 and realizing a tight fit between the sections.

[0031] When one section is damaged by wear, corrosion, or other defects, that section can be disassembled and replaced locally, extending the overall service life of screw 3 and reducing the production cost of plastic granules.

[0032] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fully biodegradable plastic extrusion granulator, comprising a barrel, a feeding mechanism connected to the barrel, a screw disposed inside the barrel, and a die disposed at the end of the barrel, characterized in that: The screw comprises an input section, a plurality of transmission sections and an output section, the input section is connected with the output section through the transmission sections, the transmission sections are detachably connected with the input section and the output section and with each other through bolts, and the input section is connected with a motor fixed outside a barrel.

2. A full-biodegradable plastic extrusion granulator according to claim 1, characterized in that: The input section and the rear end of each transmission section are provided with driving holes, the front end of each transmission section and the output section are provided with driving rods matched with the driving holes, and the input section and each transmission section are provided with bolts for fixing the driving rods.

3. The fully biodegradable plastic extrusion granulator as described in claim 2, characterized in that: The driving rods are connected with the transmission sections or the output section through positioning circular tables, and the end of the input section and the transmission section is provided with a positioning hole matched with the positioning circular table.

4. A full-biodegradable plastic extrusion granulator according to claim 3, characterized in that: A fixing hole matched with the bolt is arranged on the side wall of the driving rod.

5. A full-biodegradable plastic extrusion granulator according to claim 4, characterized in that: One end of the transmission section and the output section provided with the driving rod is provided with a sealing ring.

6. A full-biodegradable plastic extrusion granulator according to claim 4, wherein: The end of the transmission section and the output section is provided with a positioning groove for fixing the sealing ring.

7. A full-biodegradable plastic extrusion granulator according to claim 5, wherein: The upper end of the fixing hole away from the side of the sealing ring is provided with an inclined guide groove matched with the bolt.

8. A full-biodegradable plastic extrusion granulator according to claim 7, characterized in that: The end of the bolt for fixing the driving rod is provided with a round head.

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