High-efficiency energy-saving drying-free screw material pipe group

Abstract

The utility model discloses a high-efficiency energy-saving drying-free screw material pipe group, which relates to the field of injection molding, and adopts the technical scheme that the high-efficiency energy-saving drying-free screw material pipe group comprises a screw and a material barrel, the screw rod is rotationally matched in the charging barrel; the screw rod sequentially comprises a feeding section, a compression separation section, a first metering section, an exhaust section, a second compression section and a second metering section from back to front, and the charging barrel is upwards provided with a feeding hole corresponding to the feeding section; the compression separation section is provided with a solid phase groove and a liquid phase groove; and the charging barrel is upwards provided with an exhaust port corresponding to the exhaust section. And by arranging the solid phase tank and the liquid phase tank, liquefied raw materials and non-fully liquefied raw materials can be separated, so that the non-fully liquefied raw materials are further liquefied independently and are prevented from being mixed together, and the injection molding quality can be remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding, and in particular to a high-efficiency, energy-saving, drying-free screw tube assembly. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. It involves injecting completely molten plastic material, stirred by a screw at a specific temperature, into a mold cavity under high pressure, and then cooling and solidifying to obtain the molded part. This method is suitable for the mass production of complex-shaped parts and is one of the important processing methods.

[0003] In actual production, the raw materials are not melted synchronously in the screw and barrel. Instead, some melt and some do not melt completely. In this state, the screw extrusion and agitation often mix the two states of raw materials together and inject them forward into the mold cavity, affecting the overall quality. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a high-efficiency, energy-saving, and dry-free screw feed tube assembly. By setting up a solid phase tank and a liquid phase tank, it can separate liquefied and insufficiently liquefied raw materials, allowing the insufficiently liquefied raw materials to be further liquefied separately, avoiding mixing together, and significantly improving the quality of injection molding.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a high-efficiency energy-saving, drying-free screw barrel assembly, including a screw and a barrel; the screw is rotatably fitted inside the barrel;

[0006] The screw, from back to front, includes a feeding section, a compression and separation section, a first metering section, an exhaust section, a second compression section, and a second metering section. The barrel is provided with a feed inlet facing upwards corresponding to the feeding section.

[0007] The compression and separation section is equipped with a solid phase tank and a liquid phase tank; the material cylinder is provided with an exhaust port facing upwards corresponding to the exhaust section.

[0008] The raw material enters the barrel through the inlet and is first fed into the compression and separation section via the feeding section. The plastic raw material rapidly and thoroughly transforms from a glassy state to a viscous flow state. Due to the presence of the solid and liquid phase tanks, the solid and liquid phases are separated under compression. The liquid phase is squeezed into the liquid phase tank, while the insufficiently liquefied material in the solid phase tank is further liquefied, preventing mixing of solid and liquid materials and significantly improving injection molding quality. Then, the raw material is kneaded a second time in the first metering section to ensure uniform and thorough plastic melting. Finally, the internal pressure is released in the venting section, allowing moisture to escape from the raw material, eliminating the need for drying.

[0009] Preferably, the front end of the barrel is provided with an injection nozzle via a connecting flange.

[0010] Preferably, the first metering section is equipped with a reciprocating mixing head. This constitutes a secondary kneading process, ensuring that the plastic melts evenly and thoroughly.

[0011] Preferably, a gradually decreasing slope with a decreasing diameter is provided at the connection between the first metering section and the exhaust section. This can solve the problem of dead corners left by material stacking due to abrupt changes in the existing screw, which are difficult to clean.

[0012] Preferably, a seepage gap is left between the threads of the screw thread and the feed cylinder between the solid phase tank and the liquid phase tank. This facilitates the flow of liquid raw materials into the liquid phase tank.

[0013] Preferably, the small diameter of the exhaust section gradually increases from back to front. This allows for the compression of the raw material, facilitating exhaust and providing sufficient power for forward transport.

[0014] Preferably, a number of pins are radially distributed between the threads of the exhaust section. This helps the moisture in the raw materials to evaporate and effectively disperses the moisture trapped in the raw materials, thereby solving the defect of incomplete dehumidification causing substandard products in current products on the market.

[0015] Preferably, the vent is equipped with an anti-overflow screw pressing device. This prevents the raw material from flowing out along with the water vapor during venting.

[0016] The beneficial effects of this utility model are:

[0017] This solution separates liquefied and insufficiently liquefied raw materials by setting up solid phase tanks and liquid phase tanks, allowing the insufficiently liquefied raw materials to be further liquefied separately, avoiding mixing together, which can significantly improve the quality of injection molding. In addition, due to the setting of venting section, the moisture in the raw materials can be discharged from here, and the set pins can spread the moisture inside the raw materials, allowing it to be discharged more fully. Attached Figure Description

[0018] 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 will be briefly introduced below. Obviously, the drawings described below are only one of the drawings of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0020] The components are as follows: 1. Barrel; 2. Feed inlet; 3. Exhaust outlet; 4. Anti-overflow screw pressing device; 5. Screw head three-piece set; 6. Connecting flange; 7. Injection nozzle; 8. Feeding section; 9. Compression and separation section; 10. First metering section; 11. Exhaust section; 12. Second compression section; 13. Second metering section; 14. Liquid phase tank; 15. Solid phase tank; 16. Reciprocating mixing head; 17. Pin; 18. Gradient slope; 19. Screw. Detailed Implementation

[0021] To enhance understanding of this utility model, it will be described in further detail below with reference to the accompanying drawings and embodiments. These embodiments are only used to explain this utility model and do not limit the scope of protection of this utility model.

[0022] Example

[0023] like Figure 1 As shown, the high-efficiency, energy-saving, drying-free screw feed tube assembly includes a screw 19 and a feed tube 1; the screw 19 is rotatably fitted inside the feed tube 1.

[0024] The screw 19 includes, from back to front, a feeding section 8, a compression and separation section 9, a first metering section 10, an exhaust section 11, a second compression section 12, and a second metering section 13. The barrel 1 is provided with a feed inlet 2 facing upwards corresponding to the feeding section 8.

[0025] The compression and separation section 9 is provided with a solid phase tank 15 and a liquid phase tank 14; the material cylinder 1 is provided with an exhaust port 3 facing upwards corresponding to the exhaust section 11.

[0026] The raw material enters the barrel 1 through the feed inlet 2 and is first fed into the compression and separation section 9 via the feeding section 8. The plastic raw material rapidly and thoroughly transforms from a glassy state to a viscous flow state. Due to the presence of the solid phase tank 15 and the liquid phase tank 14, the solid and liquid raw materials are separated under compression. The liquid raw material is squeezed into the liquid phase tank 14, while the raw material in the solid phase tank 15 that is not fully liquefied can be further liquefied, preventing the mixing of solid and liquid materials and significantly improving the quality of injection molding. Then, the raw material is kneaded a second time in the first metering section 10 to ensure uniform and thorough plastic melting. Finally, the internal pressure is released through the exhaust section 11, allowing the moisture in the raw material to be removed, eliminating the need for drying.

[0027] As those skilled in the art will know, the barrel 1 is equipped with a heating device.

[0028] An injection nozzle 7 is provided at the front end of the barrel 1 via a connecting flange 6. A screw head three-piece sleeve 5 is provided at the front end of the screw 19. The screw head three-piece sleeve 5 is a conventional structure and will not be described in detail here.

[0029] The first metering section 10 is equipped with a reciprocating mixing head 16, which constitutes a secondary kneading process, allowing the plastic to melt evenly and fully.

[0030] A gradually decreasing slope 18 is provided at the connection between the first metering section 10 and the exhaust section 11. This can solve the problem of dead corners left by the abrupt changes in the existing screw 19, which makes the raw material stacking difficult to clean.

[0031] A seepage gap is left between the threads of the solid phase tank 15 and the liquid phase tank 14 and the feed cylinder 1. This facilitates the flow of liquid raw materials to the liquid phase tank 14. The rear ends of the solid phase tank 15 and the liquid phase tank 14 are connected, while the front ends of the solid phase tank 15 and the liquid phase tank 14 are separated.

[0032] The small diameter of the exhaust section 11 gradually increases from back to front. It can compress the raw material, which facilitates exhaust and provides sufficient power to transport it forward.

[0033] The exhaust section 11 has several pins 17 radially distributed between the threads. This helps the moisture in the raw materials to evaporate and effectively disperses the moisture trapped in the raw materials, thus solving the defect of incomplete dehumidification causing substandard products in the current market.

[0034] The exhaust port 3 is equipped with an anti-overflow adhesive spiral pressing device 4. This prevents the raw material from flowing out along with the water vapor during exhaust. The anti-overflow adhesive spiral pressing device 4 can adopt an existing solution, and its structure will not be described in detail here.

[0035] The beneficial effects of this utility model are:

[0036] This solution can separate liquefied and insufficiently liquefied raw materials by setting up a solid phase tank 15 and a liquid phase tank 14, so that the insufficiently liquefied raw materials can be further liquefied separately and avoided mixing together, which can significantly improve the quality of injection molding. In addition, due to the setting of the venting section 11, the water vapor in the raw materials can be discharged from here, and the setting of the pin 17 can spread out the moisture inside the raw materials, so that it can be discharged more fully.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-efficiency, energy-saving, drying-free screw feed tube assembly, characterized in that, It includes a screw (19) and a barrel (1); the screw (19) is rotatably fitted inside the barrel (1); The screw (19) includes, from back to front, a feeding section (8), a compression and separation section (9), a first metering section (10), an exhaust section (11), a second compression section (12), and a second metering section (13). The barrel (1) is provided with a feed inlet (2) facing upwards corresponding to the feeding section (8). The compression separation section (9) is provided with a solid phase tank (15) and a liquid phase tank (14); the material cylinder (1) is provided with an exhaust port (3) facing upwards corresponding to the exhaust section (11).

2. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: The front end of the barrel (1) is provided with an injection nozzle (7) via a connecting flange (6).

3. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: The first metering section (10) is equipped with a reciprocating mixing head (16).

4. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: A gradually decreasing slope (18) is provided at the connection between the first metering section (10) and the exhaust section (11).

5. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: A seepage gap is left between the threads of the solid phase tank (15) and the liquid phase tank (14) and the material cylinder.

6. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: The diameter of the exhaust section (11) gradually increases from back to front.

7. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: The exhaust section (11) has several pins (17) radially distributed between the threads.

8. The high-efficiency, energy-saving, drying-free screw feed tube assembly according to claim 1, characterized in that: The exhaust port (3) is equipped with an anti-overflow glue spiral pressing device (4).

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