Plastic particle extrusion screw structure

Abstract

The utility model discloses a plastic particle extrusion screw structure and relates to the technical field of extruders. The extrusion rod comprises a conveying rod, a compression rod and a dosage rod, the side wall of the conveying rod is fixedly sleeved with a crushing blade, the face, facing the compression rod, of the conveying rod is provided with a notch, the side wall of the conveying rod is provided with a through opening in a penetrating mode, the face, facing the conveying rod, of the compression rod is fixedly connected with a protruding column, and the protruding column corresponds to and is matched with the through opening; a threaded hole is formed in the side wall of the protruding column in a penetrating mode, a fastening bolt is arranged on one side of the protruding column, and the fastening bolt is matched with the through opening and the threaded hole. According to the utility model, materials are crushed to eliminate gaps among the materials, so that bubbles are removed, the extrusion effect is improved, and when a certain section in the screw rod is damaged, the whole replacement is not needed, and only a damaged part needs to be replaced, so that the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to a plastic granule extrusion screw structure. Background Technology

[0002] Plastic pellets refer to granular plastics, which are generally divided into three categories: general-purpose plastics, engineering plastics, and specialty plastics. Plastic pellets can be recycled from waste plastics. These recycled pellets are made by recycling waste plastic products and processing them through processes such as melting and pelletizing. Recycled pellets are not only inexpensive but also have a broad market, providing an effective way to reuse waste plastics. Extrusion screws are required when recycling plastic pellets.

[0003] Existing plastic granule extrusion screws mostly use a one-piece screw for extrusion. However, during the extrusion process, the gaps within the granules are not easily eliminated. Granules with many internal gaps can form air bubbles in the mold wall of the finished product after entering the injection molding machine cavity, which affects the quality of the finished product. Furthermore, if a section of the screw is damaged, the entire screw needs to be replaced, which is costly. To address these issues, the inventor proposes a new plastic granule extrusion screw structure to solve these problems. Utility Model Content

[0004] To address the problem that existing plastic granule extrusion screws cannot eliminate gaps within the granules during extrusion, thus affecting the quality of the finished product and incurring high maintenance costs, the purpose of this invention is to provide a plastic granule extrusion screw structure.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a plastic granule extrusion screw structure, including an extrusion rod, the extrusion rod including a conveying rod, a compression rod and a dosing rod, a crushing blade fixedly sleeved on the side wall of the conveying rod, a notch provided on the side of the conveying rod facing the compression rod, a through-hole provided through the side wall of the conveying rod, a protrusion fixedly connected to the side of the compression rod facing the conveying rod, the protrusion corresponding to and cooperating with the through-hole, a threaded hole provided through the side wall of the protrusion, a fastening bolt provided on one side of the protrusion, the fastening bolt cooperating with the through-hole and the threaded hole.

[0006] Preferably, the compression rod is located between the delivery rod and the dosing rod, and the compression rod, delivery rod, and dosing rod are all detachably connected. When the extrusion rod is installed and used, the delivery rod must be located at the delivery section of the extrusion cylinder, the compression rod must be located at the compression section of the extrusion cylinder, and the dosing rod must be located at the dosing section of the extrusion cylinder. The connection method between the compression rod and the dosing rod is the same as the connection method between the delivery rod and the compression rod.

[0007] Preferably, the crushing blade is spiral-shaped, and the spiral direction of the crushing blade is the same as that of the conveyor rod. The crushing blade has an S-shaped spiral structure to facilitate the flow of materials. The crushing blade is used to crush materials to eliminate gaps between materials, thereby removing air bubbles and improving the extrusion effect. The S-shaped spiral crushing blade can effectively prevent accumulation while crushing. The crushing blade includes a first arc-shaped blade and a second arc-shaped blade, both of which are made of alloy tool steel. The first arc-shaped blade includes a first arc-shaped surface, and the second arc-shaped blade includes a second arc-shaped surface. The first arc-shaped surface and the second arc-shaped surface correspond to and cooperate with each other. When installing the crushing blade, the first arc-shaped blade and the second arc-shaped blade are respectively attached to the conveyor rod, and the first arc-shaped surface and the second arc-shaped surface must correspond to and contact each other. Then, the crushing blade is welded to the conveyor rod using a welding machine. The crushing blade is divided into a first arc-shaped blade and a second arc-shaped blade to facilitate the cooperation between the crushing blade and the conveyor rod.

[0008] Preferably, one end of the through-hole extends into the recess, and the through-hole is misaligned with the external thread on the conveying rod. A sealing head is provided on one side of the conveying rod, and the sealing head corresponds to and engages with the through-hole. A retaining plate is fixedly connected to the outer wall of the protrusion, and a retaining groove is provided on the inner wall of the through-hole. The retaining plate corresponds to and engages with the retaining groove. When assembling the conveying rod and the compression rod, the protrusion is inserted into the recess, and the retaining plate engages with the retaining groove. The through-hole is aligned with the threaded hole, and a fastening bolt is inserted into the through-hole, and the fastening bolt engages with the threaded hole. This completes the limiting and fixing of the protrusion, thereby completing the assembly of the conveying rod and the compression rod. Next, the sealing head is placed on the end face of the through-hole, and sealant is applied at the connection between the sealing head and the through-hole to prevent plastic particles from entering the through-hole. When the conveying rod or the compression rod is damaged, the operation is reversed to separate the conveying rod and the compression rod for replacement of the damaged part, thus avoiding overall replacement and reducing costs.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. This utility model has a crushing blade on the conveying rod. The crushing blade is used to crush the material to eliminate the gaps between the materials, thereby removing air bubbles and improving the extrusion effect. The crushing blade has an S-shaped spiral structure to avoid affecting the material conveying of the conveying rod.

[0011] 2. This utility model can reduce maintenance costs. When a section of the screw is damaged, such as when the conveying rod or the compression rod is damaged, the sealing head can be removed and the fastening bolts can be unscrewed to separate the card plate from the card slot, thereby separating the conveying rod from the compression rod and replacing the damaged part, thus avoiding the need for complete replacement and reducing costs. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is an exploded view of the present invention.

[0015] Figure 3 This is a schematic diagram of the crushing blade structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Extrusion rod; 2. Conveying rod; 3. Compression rod; 4. Dosing rod; 5. Crushing blade; 6. First arc-shaped blade; 7. First arc-shaped surface; 8. Second arc-shaped blade; 9. Second arc-shaped surface; 10. Notch; 11. Slot; 12. Through port; 13. Sealing head; 14. Protrusion; 15. Clamping plate; 16. Threaded hole; 17. Fastening bolt. Detailed Implementation

[0018] 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.

[0019] Example: Figure 1-4 As shown, this utility model provides a plastic granule extrusion screw structure, including an extrusion rod 1. The extrusion rod 1 includes a conveying rod 2, a compression rod 3, and a dosing rod 4. A crushing blade 5 is fixedly sleeved on the side wall of the conveying rod 2. A notch 10 is provided on the side of the conveying rod 2 facing the compression rod 3. A through-hole 12 is provided through the side wall of the conveying rod 2. A protrusion 14 is fixedly connected on the side of the compression rod 3 facing the conveying rod 2. The protrusion 14 corresponds to and cooperates with the through-hole 12. A threaded hole 16 is provided through the side wall of the protrusion 14. A fastening bolt 17 is provided on one side of the protrusion 14. The fastening bolt 17 cooperates with the through-hole 12 and the threaded hole 16.

[0020] The compression rod 3 is located between the delivery rod 2 and the dosing rod 4, and the compression rod 3 is detachably connected to both the delivery rod 2 and the dosing rod 4.

[0021] By adopting the above technical solution, when installing and using the extrusion rod 1, the conveying rod 2 should be located at the conveying section of the extrusion cylinder, the compression rod 3 should be located at the compression section of the extrusion cylinder, and the dosing rod 4 should be located at the dosing section of the extrusion cylinder. The connection method between the compression rod 3 and the dosing rod 4 is the same as the connection method between the conveying rod 2 and the compression rod 3.

[0022] The crushing blade 5 is spiral-shaped, and the spiral direction of the crushing blade 5 is the same as the spiral direction of the conveying rod 2.

[0023] By adopting the above technical solution, the crushing blade 5 has an S-shaped spiral structure to facilitate the flow of materials. The crushing blade 5 is used to crush materials to eliminate gaps between materials, thereby removing air bubbles and improving the extrusion effect. Moreover, the S-shaped spiral crushing blade 5 can effectively prevent accumulation while crushing.

[0024] The breaking blade 5 includes a first arc-shaped blade 6 and a second arc-shaped blade 8. Both the first arc-shaped blade 6 and the second arc-shaped blade 8 are made of alloy tool steel. The first arc-shaped blade 6 includes a first arc-shaped surface 7, and the second arc-shaped blade 8 includes a second arc-shaped surface 9. The first arc-shaped surface 7 and the second arc-shaped surface 9 correspond to and cooperate with each other.

[0025] By adopting the above technical solution, when installing the crushing blade 5, the first arc-shaped blade 6 and the second arc-shaped blade 8 are respectively attached to the conveying rod 2, and the first arc-shaped surface 7 and the second arc-shaped surface 9 are required to correspond and contact each other. Then, the crushing blade 5 is welded to the conveying rod 2 by a welding machine. The crushing blade 5 is divided into the first arc-shaped blade 6 and the second arc-shaped blade 8, the purpose of which is to facilitate the matching of the crushing blade 5 with the conveying rod 2.

[0026] One end of the opening 12 extends into the recess 10, and the opening 12 is misaligned with the external thread on the conveying rod 2. A sealing head 13 is provided on one side of the conveying rod 2. The sealing head 13 corresponds to and cooperates with the opening 12. A clamping plate 15 is fixedly connected to the outer wall of the protrusion 14. A groove 11 is provided on the inner wall of the opening 12. The clamping plate 15 corresponds to and engages with the groove 11.

[0027] By adopting the above technical solution, when assembling the conveying rod 2 and the compression rod 3, the protrusion 14 is inserted into the recess 10, and the clamping plate 15 is matched with the clamping groove 11. The through-hole 12 is aligned with the threaded hole 16, and the fastening bolt 17 is inserted into the through-hole 12, and the fastening bolt 17 is matched with the threaded hole 16. This completes the limiting and fixing of the protrusion 14, thereby completing the assembly of the conveying rod 2 and the compression rod 3. Next, the sealing head 13 is placed at the end face of the through-hole 12, and sealant is applied at the connection between the sealing head 13 and the through-hole 12 to prevent plastic particles from entering the through-hole 12. When the conveying rod 2 or the compression rod 3 is damaged, the operation is reversed to separate the conveying rod 2 and the compression rod 3 for replacement of the damaged part, thereby avoiding the need for complete replacement and reducing costs.

[0028] Working principle: When this utility model is in use, a crushing blade 5 is provided on the conveying rod 2. The crushing blade 5 is used to crush the material to eliminate the gaps between the materials, thereby removing air bubbles and improving the extrusion effect.

[0029] When installing the crushing blade 5, the first arc-shaped blade 6 and the second arc-shaped blade 8 are respectively attached to the conveying rod 2, and the first arc-shaped surface 7 and the second arc-shaped surface 9 are corresponding and in contact. Then, the first arc-shaped blade 6 and the second arc-shaped blade 8 are welded to the conveying rod 2 by a welding machine, and the installation of the crushing blade 5 is completed.

[0030] When assembling the conveyor rod 2 and the compression rod 3, the protrusion 14 is inserted into the recess 10, and the clamping plate 15 is matched with the clamping groove 11. The through port 12 is aligned with the threaded hole 16. The fastening bolt 17 is inserted into the through port 12 and matched with the threaded hole 16. This completes the limiting and fixing of the protrusion 14, thereby completing the assembly of the conveyor rod 2 and the compression rod 3. When the conveyor rod 2 or the compression rod 3 is damaged, the operation is reversed to separate the conveyor rod 2 and the compression rod 3 for replacement of the damaged part, thus avoiding the need for complete replacement and reducing costs.

[0031] 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 plastic pellet extrusion screw structure, comprising an extrusion rod (1), characterized in that: The extrusion rod (1) includes a conveying rod (2), a compression rod (3), and a dosing rod (4). A crushing blade (5) is fixedly sleeved on the side wall of the conveying rod (2). A notch (10) is provided on the side of the conveying rod (2) facing the compression rod (3). A through-hole (12) is provided through the side wall of the conveying rod (2). A protrusion (14) is fixedly connected on the side of the compression rod (3) facing the conveying rod (2). The protrusion (14) corresponds to and cooperates with the through-hole (12). A threaded hole (16) is provided through the side wall of the protrusion (14). A fastening bolt (17) is provided on one side of the protrusion (14). The fastening bolt (17) cooperates with the through-hole (12) and the threaded hole (16).

2. The plastic granule extrusion screw structure as described in claim 1, characterized in that, The compression rod (3) is located between the delivery rod (2) and the dosage rod (4), and the compression rod (3) is detachably connected to the delivery rod (2) and the dosage rod (4).

3. The plastic granule extrusion screw structure as described in claim 1, characterized in that, The crushing blade (5) is spiral-shaped, and the spiral direction of the crushing blade (5) is the same as the spiral direction of the conveying rod (2).

4. The plastic granule extrusion screw structure as described in claim 1, characterized in that, The breaking blade (5) includes a first arc-shaped blade (6) and a second arc-shaped blade (8), both of which are made of alloy tool steel.

5. The plastic granule extrusion screw structure as described in claim 4, characterized in that, The first arc-shaped blade (6) includes a first arc-shaped surface (7), and the second arc-shaped blade (8) includes a second arc-shaped surface (9). The first arc-shaped surface (7) and the second arc-shaped surface (9) correspond to and cooperate with each other.

6. The plastic granule extrusion screw structure as described in claim 1, characterized in that, One end of the opening (12) extends into the recess (10), and the opening (12) is misaligned with the external thread on the conveying rod (2).

7. The plastic pellet extrusion screw structure as described in claim 1, characterized in that, A sealing head (13) is provided on one side of the conveying rod (2), and the sealing head (13) corresponds to and cooperates with the opening (12).

8. The plastic granule extrusion screw structure as described in claim 1, characterized in that, The outer side wall of the protruding post (14) is fixedly connected to a retaining plate (15), and the inner side wall of the opening (12) is provided with a retaining groove (11). The retaining plate (15) corresponds to and engages with the retaining groove (11).

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