Polyethylene processing discharge structure

Abstract

The utility model discloses a polyethylene processing discharge structure, including pipeline and injection molding nozzle, the inside diameter of injection molding nozzle is same with pipeline, the inside diameter of injection molding nozzle lower extreme is gradually reduced, is provided with heating wire one in the winding of injection molding nozzle, still include plugging subassembly, pipeline heat preservation subassembly, plugging subassembly is located in the inside of injection molding nozzle, and pipeline heat preservation subassembly includes the heating jacket of detachable installation in the outside of pipeline, and heating jacket can be spliced and use, the heating wire two of equal coiling is equipped in heating jacket, and the wiring end of heating wire two all extends out heating jacket and is equipped with. The utility model can guarantee the temperature of pipeline, injection molding nozzle, make melt keep high fluidity, low viscosity, avoid the blockage in pipeline, injection molding nozzle, when melt quantity reduces obviously, and the plugging plate cannot be pushed away when pressure is deficient, and the injection molding nozzle is cut off, can effectively avoid the blockage caused by melt backflow.

Description

Technical Field

[0001] This utility model relates to the field of polyethylene processing technology, specifically to a polyethylene processing discharge structure. Background Technology

[0002] Polyethylene (PE) is a common thermoplastic polymer with excellent chemical stability, low-temperature resistance, and electrical insulation properties, and is widely used in packaging, construction, automotive, and electronics industries. Injection molding is a common method of processing polyethylene. The principle is to heat and melt polyethylene granules, and then inject the molten plastic into a closed mold cavity through the injection device of an injection molding machine. After cooling and solidification, the desired product shape is obtained.

[0003] In polyethylene injection molding, molten polyethylene has a high viscosity and low fluidity, making it prone to clogging at the outlet or in the mold runner. In addition, in the later stages of injection molding, due to the decrease in the volume and pressure of the melt, melt backflow can easily form in the channel at the end of the injection nozzle, solidifying inside the channel. This prevents timely melting during the next use, also causing blockage in the channel. In summary, there is room for technical improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problem of easy blockage of injection channels in polyethylene processing, and provides a polyethylene processing discharge structure.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a polyethylene processing discharge structure, including a pipeline and an injection nozzle; the inner diameter of the injection nozzle is the same as that of the pipeline; the inner diameter of the lower end of the injection nozzle gradually decreases; a heating wire is wound inside the injection nozzle; and further includes:

[0006] A sealing assembly; located inside the injection nozzle, including an annular guide plate located near the middle of the injection nozzle, with an inner cylinder below the guide plate; a fixed cylinder located at the lower end of the inner cylinder, an adjusting cylinder located at the upper end of the fixed cylinder, an umbrella-shaped sealing plate corresponding to the guide plate located at the upper end of the adjusting cylinder, and a buffer spring located between the adjusting cylinder and the fixed cylinder.

[0007] Pipeline insulation assembly; including a detachable heating jacket installed on the outside of the pipeline, the heating jacket being modular and usable; each heating jacket has a second heating wire coiled inside, and each second heating wire extends out of the heating jacket and has a terminal.

[0008] Furthermore, the thickness of the guide plate gradually decreases from the outer ring to the inner ring.

[0009] Furthermore, the lower end of the fixed cylinder is sealed, and the upper end of the adjusting cylinder is sealed.

[0010] Furthermore, a number of baffles are arranged from top to bottom inside the pipeline, and the longitudinal section of the baffles is triangular.

[0011] Furthermore, each heating sleeve has a splicing strip at its upper end and an annular splicing groove at its lower end that can accommodate the splicing strip.

[0012] Furthermore, the heating jacket includes a semi-cylindrical shell one and a shell two, and each of the shell one and shell two has several mounting plates on opposite sides, which are connected by bolts; a sealing strip is provided between the opposite sides of the shell one and shell two.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] A heating wire is provided on the outside of the injection nozzle to maintain the melt temperature at the injection end and prevent blockage caused by reduced fluidity due to temperature difference at the exit.

[0015] It is equipped with a sealing component. When the melt volume decreases significantly and the pressure is insufficient, the sealing plate cannot be pushed open, thus blocking the injection nozzle and effectively preventing melt backflow from causing blockage.

[0016] The pipeline is equipped with heating jackets that can be added or removed at will, which can ensure the temperature of the pipeline, keep the melt highly fluid and low in viscosity, and prevent blockage in the pipeline. Attached Figure Description

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

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the injection nozzle of this utility model.

[0020] Figure 4 This is a schematic diagram of the heating jacket part of this utility model.

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide plate of this utility model.

[0022] Figure 6 This is a schematic diagram of the cross-sectional structure of the baffle strip of this utility model.

[0023] As shown in the figure: 1. Pipeline, 2. Injection nozzle, 3. Guide plate, 4. Inner cylinder, 5. Fixed cylinder, 6. Adjusting cylinder, 7. Sealing plate, 8. Buffer spring, 9. Baffle, 10. Heating wire one, 11. Heating sleeve, 12. Splicing strip, 13. Heating wire two, 14. Terminal, 15. Housing one, 16. Housing two. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Example 1, in conjunction with Appendix Figure 1 , 2 3. A polyethylene processing discharge structure, including a pipeline 1 and an injection nozzle 2; the inner diameter of the injection nozzle 2 is the same as that of the pipeline 1 to reduce obstruction during the downward flow of the melt; the inner diameter of the lower end of the injection nozzle 2 gradually decreases; a heating wire 10 is wound inside the injection nozzle 2, and the heating wire 10 can maintain the melt temperature at the injection end to avoid blockage caused by reduced fluidity due to temperature difference at the outlet.

[0026] Combined with appendix Figure 2 , 3 5. It also includes a sealing component; located inside the injection nozzle 2, including an annular guide plate 3 located inside the injection nozzle 2 and near the middle, the guide plate 3 gradually decreases in thickness from the outer ring to the inner ring, thus forming a slope to guide the melt; an inner cylinder 4 is provided below the guide plate 3, a fixed cylinder 5 is provided at the lower end of the inner cylinder 4, and an adjusting cylinder 6 is provided at the upper end of the fixed cylinder 5; the lower end of the fixed cylinder 5 is sealed and the upper end of the adjusting cylinder 6 is sealed; an umbrella-shaped sealing plate 7 corresponding to the guide plate 3 is provided at the upper end of the adjusting cylinder 6, and a buffer spring 8 is provided between the adjusting cylinder 6 and the fixed cylinder 5.

[0027] In the above structure, when the melt volume is sufficient and flows downwards for injection molding under a certain pressure, the sealing plate 7 drives the regulating cylinder 6 to move downwards, and the spring 8 is compressed, thereby forming a passage between the sealing plate 7 and the inner cylinder 4, so that the injection molding operation can be carried out.

[0028] Combined with appendix Figure 2 , 6 Inside the pipe 1, several baffles 9 are arranged from top to bottom. The longitudinal section of the baffles 9 is triangular. The baffles 9 can prevent the molten material from being in close contact with the inner wall of the pipe 1 throughout its fall, providing space for buffering and changing the contact mode between the pipe 1 and the molten material. The area of ​​the longitudinal section of the baffles 9 gradually increases from top to bottom, so that the molten material reduces the adhesion force with the inner wall of the pipe 1 when it reaches this point. In addition, the width of the lower end of the baffles 9 is less than 1 cm, which avoids lengthening the side of the baffles 9 and instead increases the contact area with the molten material.

[0029] Combined with appendix Figure 1 , 2 4. It also includes a pipeline insulation component; including a heating jacket 11 that can be detachably installed on the outside of the pipeline, and the heating jacket 11 can be spliced ​​together; specifically, the upper end of the heating jacket 11 is provided with a splicing strip 12, and the lower end of the heating jacket 11 is provided with an annular splicing groove that can accommodate the splicing strip 12; in the above structure, the number of heating jackets 11 used can be adjusted at will according to the actual situation and the state of the melt, and can be used only near the injection nozzle 2;

[0030] In combination with the above structure, heating wire 13 is coiled inside the heating jacket 11. Heating wire 13 extends out of the heating jacket 11 and is provided with a terminal 14. The heating wire 13 heats and insulates the corresponding pipe section of the heating jacket 11, maintains the temperature of the pipe, keeps the melt highly fluid and low in viscosity, and avoids blockage in the pipe.

[0031] In addition, the heating jacket 11 includes a semi-cylindrical shell 15 and a shell 2 16. Several mounting plates are provided on the opposite sides of the shell 15 and the shell 2 16, and the opposite mounting plates are connected by bolts. A sealing strip is provided between the opposite sides of the shell 15 and the shell 2 16. With the above structure, the heating jacket 11 can be disassembled and installed on the pipeline 1, which facilitates the adjustment of the heating position and heating length.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A polyethylene processing discharge structure, comprising a pipe (1) and an injection nozzle (2); characterized in that: The inner diameter of the injection nozzle (2) is the same as that of the pipeline (1); the inner diameter of the lower end of the injection nozzle (2) gradually decreases; The injection nozzle (2) is wound with a heating wire (10); it also includes: A sealing assembly is located inside the injection nozzle (2), including an annular guide plate (3) located inside the injection nozzle (2) and near the middle, with an inner cylinder (4) below the guide plate (3); a fixed cylinder (5) is located at the lower end of the inner cylinder (4), and an adjusting cylinder (6) is movably located at the upper end of the fixed cylinder (5); an umbrella-shaped sealing plate (7) corresponding to the guide plate (3) is located at the upper end of the adjusting cylinder (6); and a buffer spring (8) is located between the adjusting cylinder (6) and the fixed cylinder (5). Pipeline insulation assembly; including a heating sleeve (11) that can be detachably installed on the outside of the pipeline, the heating sleeve (11) can be spliced ​​and used; heating wires (13) are coiled inside the heating sleeve (11), and the heating wires (13) extend out of the heating sleeve (11) and are provided with terminals (14).

2. The polyethylene processing discharge structure according to claim 1, characterized in that: The thickness of the guide plate (3) gradually decreases from the outer ring to the inner ring.

3. The polyethylene processing discharge structure according to claim 1, characterized in that: The lower end of the fixed cylinder (5) is sealed, and the upper end of the adjusting cylinder (6) is sealed.

4. The polyethylene processing discharge structure according to claim 1, characterized in that: The pipeline (1) is provided with several baffles (9) arranged from top to bottom, and the longitudinal section of the baffles (9) is triangular.

5. The polyethylene processing discharge structure according to claim 1, characterized in that: The upper end of each heating sleeve (11) is provided with splicing strips (12), and the lower end of each heating sleeve (11) is provided with an annular splicing groove that can accommodate the splicing strips (12).

6. The polyethylene processing discharge structure according to claim 1, characterized in that: The heating jacket (11) includes a semi-cylindrical shell one (15) and shell two (16). Each of the shell one (15) and shell two (16) has several mounting plates on its opposite sides, and the opposite mounting plates are connected by bolts. Each of the shell one (15) and shell two (16) has a sealing strip between its opposite sides.

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