Machine barrel screw rod for plastic processing
By introducing a first homogenization section, a first mixing section, a second homogenization section, and a second mixing section into the screw of a plastic extruder, combined with a stirring column and baffle ring structure, the problem of uneven mixing was solved, resulting in higher product quality and production stability.
Patent Information
- Application Number
- CN202520309988.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The screw of existing plastic extruders does not achieve ideal mixing uniformity, making it difficult to improve product quality.
A barrel screw was designed, comprising a first homogenization section, a first mixing section, a second homogenization section, and a second mixing section. Combined with an agitator and retaining ring structure, it improves the uniformity of mixing through multiple diversions and mixing. Cooling channels and check rings are set on the screw to ensure stable material supply.
By repeatedly diverting and mixing the mixture, the uniformity of the mixture is significantly improved, thereby enhancing product quality, and production stability is ensured by cooling and preventing melt backflow.
Smart Images
Figure CN223849917U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to extrusion equipment technical field, specifically to be used for the machine cylinder screw rod of plastic processing. BACKGROUND
[0002] In the production process of plastic extruder, additives need to be added in raw materials for improving the performance of products; its working principle is that raw materials and additives are added into the cylinder in proportion at first, then the mixture becomes molten polymer through the rotation of screw rod in the cylinder and the heating of the cylinder, and the molten material is pushed forward with the rotation of the screw rod, so that the molten material is shot out from the nozzle at high pressure and speed. The screw rod is the core component of the plastic extruder, and its design directly affects the production efficiency, product quality and energy consumption of the extruder. The existing screw rod generally includes a feeding section, a plasticizing section and a mixing section, and the uniformity of the mixture after the raw materials and additives enter the mixing section is not ideal, so that high-quality products cannot be produced. SUMMARY
[0003] In order to overcome the defects of the background art, the utility model provides a machine cylinder screw rod for plastic processing, which solves the problem of non-ideal uniformity of the mixture of the existing screw rod.
[0004] The technical scheme adopted by the utility model is as follows:
[0005] The machine cylinder screw rod for plastic processing comprises a rod body, the rod body is sequentially provided with a feeding section and a plasticizing section along a feeding direction, and further comprises:
[0006] A first homogenizing section is arranged in front of the plasticizing section;
[0007] A first mixing section is arranged in front of the first homogenizing section, and the first mixing section is uniformly provided with a first groove arranged in an inclined manner;
[0008] A second homogenizing section is arranged in front of the first mixing section;
[0009] A second mixing section is arranged in front of the second homogenizing section, and the second mixing section is provided with at least two blocking rings arranged at intervals, and the blocking rings are uniformly provided with second grooves in the circumferential direction;
[0010] Stirring columns are arranged on the first homogenizing section and the second homogenizing section.
[0011] The screw rib of the first homogenizing section is provided with a reflux groove.
[0012] The front and rear adjacent stirring columns are arranged in a staggered manner.
[0013] The rod body is provided with a cooling channel in the axial direction.
[0014] The discharge end of the rod body is provided with a non-return ring.
[0015] The machine cylinder is provided with an anti-skid groove on the inner wall of the feeding port.
[0016] The bottom of the feeding port of the machine cylinder is provided with a drainage groove, and the machine cylinder is provided with a drainage hole for communicating with the drainage groove.
[0017] The utility model discloses the beneficial effect is:
[0018] When the mixture is plasticized through the plasticizing section, it first enters the first homogenizing section through the stirring column, is stirred and mixed, then is shunted through the first recess of the first mixing section, enters the second homogenizing section for stirring and mixing, and finally enters the second mixing section through the multiple interval-arranged blocking rings for multiple shunting and mixing, thereby improving the uniformity of the mixture mixing and improving the quality of the product. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the schematic view of the utility model.
[0020] Figure 2 It is the schematic view of the screw rod of the utility model.
[0021] Figure 3 It is the schematic view of the utility model Figure 1 The enlarged schematic view of A in the utility model.
[0022] Figure 4 It is the enlarged schematic view of B in the utility model Figure 1 .
[0023] Figure 5 It is the enlarged schematic view of C in the utility model Figure 1 .
[0024] Figure 6 It is the schematic view of the feeding port of the machine cylinder of the utility model.
[0025] Feeding section 1, plasticizing section 2, first homogenizing section 3, first mixing section 4, first recess 5, second homogenizing section 6, second mixing section 7, blocking ring 8, second recess 9, stirring column 10, reflux tank 11, cooling channel 12, non-return ring 13, machine cylinder 14, anti-skid groove 15, drainage groove 16, drainage hole 17. DETAILED DESCRIPTION
[0026] The utility model will be further described in connection with the drawings and embodiments:
[0027] As shown in the embodiments, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The machine cylinder screw rod for plastic processing comprises a rod body, the rod body is sequentially provided with a feeding section 1 and a plasticizing section 2 along a feeding direction, and further comprises:
[0028] The first homogenization section 3 is located in front of the plasticizing section 2;
[0029] The No. 1 mixing section 4 is located in front of the No. 1 homogenization section 3, and the No. 1 mixing section 4 is evenly distributed with the No. 1 groove 5 arranged at an inclination.
[0030] The No. 2 homogenization section 6 is located in front of the No. 1 mixing section 4;
[0031] The second mixing section 7 is located in front of the second homogenization section 6. The second mixing section 7 is provided with at least two baffle rings 8 arranged at intervals. The baffle rings 8 are evenly distributed with second grooves 9 in the circumference.
[0032] The stirring column 10 is set on the first homogenization section 3 and the second homogenization section 6.
[0033] After the mixture is plasticized in the plasticizing section, it first enters the first homogenization section 3 and is mixed by the stirring column 10. Then it is diverted by the first groove 5 of the first mixing section 4 and then enters the second homogenization section 6 for mixing. Finally, it enters the second mixing section 7 and is diverted and mixed multiple times by multiple baffles 8 arranged at intervals, thereby improving the uniformity of the mixture and improving the quality of the product.
[0034] In the embodiments, such as Figure 2 , Figure 3 As shown, the screw thread of the first homogenization section 3 is provided with a return groove 11. During the forward conveying of the molten material in the first homogenization section 3, part of the molten material can flow back to the rear screw groove through the return groove 11 to mix the molten material and improve the uniformity of the molten material mixing.
[0035] In the embodiments, such as Figure 2 , Figure 3 As shown, the adjacent stirring columns 10 are arranged in a staggered manner. The staggered arrangement of the stirring columns 10 can improve the uniformity of the mixture.
[0036] In the embodiments, such as Figure 1 , Figure 2 As shown, the rod body has a cooling channel 12 along its axial direction. Cooling water is circulated inside the rod body to cool the screw and prevent the plastic from decomposing due to excessively high rod body temperature.
[0037] In the embodiments, such as Figure 2 As shown, the discharge end of the rod is equipped with a check ring 13. The check ring 13 can effectively prevent melt backflow and ensure stable material supply during extrusion.
[0038] In the embodiments, such as Figure 6As shown, the inner wall of the feeding port of the barrel 14 is provided with an anti-skid groove 15. The friction between the feeding section 1 of the screw and the inner wall of the barrel 14 is increased, the slipping phenomenon between the screw and the plastic due to the water carried by the plastic is prevented, the forced feeding is carried out, and the continuous and stable feeding is ensured.
[0039] In the embodiment, as shown, Figure 6 The bottom of the feeding port of the barrel 14 is provided with a drainage groove 16, and the barrel 14 is provided with a drainage hole 17 for communicating with the drainage groove 16. The drainage groove 16 is triangular, and the water generated at the feeding port of the barrel enters the drainage groove 16 and is then discharged from the drainage hole 17.
[0040] Obviously, the above embodiments of the utility model are only examples for illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not to be exhausted, and the changes or variations which are obviously extended from the essential spirit of the utility model still belong to the protection scope of the utility model.
Claims
1. A barrel screw for plastic processing, comprising a barrel body, the barrel body being provided with a feeding section (1) and a plasticizing section (2) in sequence along a feeding direction, characterized in that, Also include: A first homogenization section (3) is arranged in front of the plasticizing section (2); A first mixing section (4) is arranged in front of the first homogenization section (3), and the first mixing section (4) is uniformly distributed with a first groove (5) arranged obliquely; A second homogenization section (6) is arranged in front of the first mixing section (4); A second mixing section (7) is arranged in front of the second homogenization section (6), and the second mixing section (7) is provided with at least two spacer rings (8) arranged at intervals, and the spacer rings (8) are circumferentially distributed with second grooves (9); The stirring column (10) is arranged on the first homogenization section (3) and the second homogenization section (6).
2. The barrel screw for plastic processing as claimed in claim 1, characterized in that: The screw flight of the first homogenization section (3) is provided with a backflow groove (11).
3. The barrel screw for plastic processing as claimed in claim 1, characterized in that: The front and rear adjacent stirring columns (10) are arranged in a staggered manner.
4. The barrel screw for plastic processing as claimed in claim 1, wherein: The rod body is provided with a cooling channel (12) along the axis direction.
5. The barrel screw for plastics processing as claimed in claim 1, characterized in that: The discharge end of the rod body is provided with a non-return ring (13).
6. The barrel screw for plastics processing as claimed in claim 1, characterized in that: Also include the cylinder (14), the inner wall of the feeding port of the cylinder (14) is provided with an anti-skid groove (15).
7. The barrel screw for plastics processing as claimed in claim 6, characterized in that: The bottom of the feeding port of the cylinder (14) is provided with a drainage groove (16), and the cylinder (14) is provided with a drainage hole (17) for communicating with the drainage groove (16).