Multi-section composite film blowing machine die

Abstract

The utility model relates to a blowing film machine die head, especially a multi-section composite blowing film machine die head, which comprises a main body, a first feeding flow channel, a second feeding flow channel, a multi-section composite flow channel and an adjusting flow channel are arranged in the main body, a plurality of first shunt flow channels are communicated with the first feeding flow channel outlet end, a plurality of second shunt flow channels are communicated with the second feeding flow channel outlet end, the multi-section composite flow channel is annular, a plurality of adjusting flow channels are sequentially communicated with the multi-section composite flow channel feeding end along the circumference, a first feeding port and a second feeding port are sequentially arranged at the adjusting flow channel feeding end, the first feeding port and the second feeding port are communicated with the first shunt flow channel and the second shunt flow channel respectively, the first feeding port and the second feeding port are respectively matched with a movable first sealing member and a second sealing member, the first feeding port and the second feeding port are selectively sealed, the material components entering the adjusting flow channel are changed, and a plurality of strip spliced cylindrical films are formed.

Description

Technical Field

[0001] This utility model relates to blown film machine die heads, and particularly to a multi-segment composite blown film machine die head. Background Technology

[0002] Chinese invention patent CN1939700A discloses a special die head for a blown film machine. It extrudes materials with different components fed by multiple screw extruders from corresponding areas of the annular die at the end of the die head, forming a cylindrical film including multiple strip sections. It is suitable for the production of black and white striped mulch film, silver-gray insect-proof mulch film, and silver-black double-sided mulch film, meeting the different requirements of different crops for light, water, temperature, pesticides, etc. However, each type of mulch film requires a different die head, resulting in high costs. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide a multi-segment composite blown film die head, which selectively feeds through multiple adjustable flow channels and converges and composites at the multi-segment composite flow channels, forming various multi-strip spliced ​​cylindrical films, which has strong production versatility and low cost.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This multi-segment composite blown film die head includes a main body, within which are provided a first feed channel, a second feed channel, a multi-segment composite channel, and an adjusting channel. The discharge end of the first feed channel is connected to multiple first branch channels, and the discharge end of the second feed channel is connected to multiple second branch channels. The multi-segment composite channel is annular, and the feed end of the multi-segment composite channel is sequentially connected to multiple adjusting channels along the circumferential direction. The feed end of the adjusting channel is sequentially provided with a first feed port and a second feed port. The first feed port and the second feed port are respectively connected to the first branch channel and the second branch channel. The first feed port and the second feed port are respectively equipped with a movable first sealing element and a second sealing element.

[0005] In this scheme, by moving the first and second sealing components to selectively block the first and second feed inlets, the composition of the material entering the regulating channel is changed. The material is uniformly fed into the feed channels of the multi-segment composite channel and composited in the membrane width direction to form a cylindrical membrane with multiple strips spliced ​​together. The width of a single strip can be adjusted, and the composition of a single strip can also be changed to meet different requirements.

[0006] Preferably, the flow direction of the regulating channel is defined as from bottom to top, the second inlet is located above the first inlet, the second inlet faces the radial direction of the main body, the second sealing member passes through the regulating channel and is radially movable relative to the main body, the end of the second sealing member is provided with a plug and a narrowing section in sequence, the cross-sectional area of ​​the narrowing section is smaller than the cross-sectional area of ​​the plug in the vertical direction, and the plug is used to block the discharge end of the second diversion channel.

[0007] In this scheme, the second sealing element penetrates the regulating flow channel and moves radially. The movement path is simple. When the plug blocks the second feed inlet, it narrows the section to allow the material in the regulating flow channel to pass through.

[0008] Preferably, the second sealing element is threadedly engaged with the main body.

[0009] In this design, the second sealing component can be moved by rotating it, making adjustment convenient.

[0010] Preferably, the discharge end of the second diversion channel has a taper, the plug is spherical, and the narrowing section is cylindrical.

[0011] In this design, the plug abuts against the tapered portion of the discharge end, ensuring a reliable seal.

[0012] Preferably, the multi-segment composite flow channel, the regulating flow channel, and the first feed flow channel are arranged vertically in sequence. The first feed flow channel is annular, the second feed flow channel is located within the enclosure of the first feed flow channel, the discharge end of the second feed flow channel is higher than the discharge end of the first feed flow channel, and the second feed inlet is higher than the first feed inlet.

[0013] In this scheme, the second feed channel is located within the first feed channel, the overall channel layout is reasonable, the flow rate and distance are uniform, and the processing is convenient.

[0014] Preferably, the diameter of the multi-segment composite flow channel is larger than the diameter of the first feed flow channel.

[0015] In this scheme, the diameter of the multi-section composite flow channel is increased, thereby reducing pressure and stabilizing the flow.

[0016] Preferably, the main body further includes a third feed channel and a multi-layer composite channel. The second feed channel is annular, and the third feed channel has an annular segment and a columnar segment. The diameter of the annular segment is larger than the diameter of the columnar segment. The columnar segment is located within the enclosure of the second feed channel, and the annular segment is located within the enclosure of the multi-layer composite channel. The multi-layer composite channel is annular, and the feed end of the multi-layer composite channel is radially connected to the multi-layer composite channel and the third feed channel in sequence.

[0017] In this scheme, the multi-stage composite material and the material in the third feed channel are uniformly merged at the multi-layer composite channel and composited in the film thickness direction, which improves the film quality and can also produce double-sided striped films.

[0018] Preferably, the main body is further provided with a connected air intake channel and an air blowing channel, and a gap is formed between the regulating channels for the air intake channel to pass through, and the air blowing channel is located within the enclosure of the multi-segment composite channels.

[0019] In this scheme, gas enters the blowing channel through the air inlet channel and is then blown out to form a cylindrical membrane.

[0020] Preferably, the feed end of the multi-segment composite flow channel is toothed, and the tip of the tooth of the feed end of the multi-segment composite flow channel is provided with a single-segment feed port that communicates with the regulating flow channel.

[0021] In this scheme, the material flows upward through the tooth tip and spreads out circumferentially along the tooth side, finally merging at the tooth bottom junction. During merging, the pressure on both sides of the splicing line is equal, resulting in stable splicing and accurate strip width.

[0022] Preferably, the main body includes a distributor, an adjusting cylinder, a compounder, and a mold cylinder. The compounder and the adjusting cylinder are arranged vertically in sequence, and together they form the adjusting flow channel. The second feed inlet is higher than the first feed inlet. The distributor has a first feed flow channel and a second feed flow channel. The adjusting cylinder has a first diversion flow channel, a second diversion flow channel, and a stepped hole. The stepped hole is for the discharge end of the distributor to be inserted and fitted. The wall of the large hole of the stepped hole has a first diversion port communicating with the first diversion flow channel, and the wall of the small hole of the stepped hole has a second diversion port communicating with the second diversion flow channel. The first diversion flow channel and the second diversion flow channel are arranged radially along the main body. The mold cylinder is sleeved outside the compounder, and the multiple composite flow channels are formed between the mold cylinder and the compounder.

[0023] In this design, the regulating cylinder and the distributor are simple to manufacture.

[0024] The beneficial effects of this invention are as follows: by selectively blocking the first and second feed inlets by moving the first and second sealing components, the composition of the material entering the regulating flow channel is changed. The material is then uniformly fed into the feed channels of the multi-segment composite flow channel and composited in the membrane width direction, forming a cylindrical membrane with multiple strips spliced ​​together. The width of a single strip can be adjusted, and the composition of a single strip can be changed to meet different requirements. Therefore, this invention has substantial features and progress compared to the prior art. Attached Figure Description

[0025] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a cross-sectional view of the present invention.

[0028] Figure 3 This is a three-dimensional structural diagram of the second sealing component in this utility model.

[0029] Figure 4 This is a three-dimensional structural diagram of the adjusting cylinder in this utility model.

[0030] Figure 5 This is a cross-sectional view of the composite device in this utility model.

[0031] Figure 6 This is a three-dimensional structural diagram of the composite device in this utility model.

[0032] In the diagram: 1. Main body; 2. First feed channel; 3. First branch channel; 4. Second feed channel; 5. Second branch channel; 6. Multi-section composite channel; 7. Adjusting channel; 8. Second branch port; 9. First branch port; 10. First sealing element; 11. Second sealing element; 12. Plug; 13. Narrowing section; 14. Third feed channel; 15. Multi-layer composite channel; 16. Annular section; 17. Columnar section; 18. Air inlet channel; 19. Air blowing channel; 20. Single-section feed port; 21. Flow divider; 22. Adjusting cylinder; 23. Composite device; 24. Mold cylinder; 25. Stepped hole. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] In the description of this application, the terms "upper" and "lower" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0036] See appendix Figure 1-2 5. In an embodiment of this invention, a multi-segment composite blown film die head includes a main body 1. The main body 1 is provided with a first feed channel 2, a second feed channel 4, a multi-segment composite channel 6, and an adjusting channel 7. The discharge end of the first feed channel 2 is connected to a plurality of first diversion channels 3, and the discharge end of the second feed channel 4 is connected to a plurality of second diversion channels 5.

[0037] The multi-segment composite flow channel 6 is annular, and the feed end of the multi-segment composite flow channel 6 is connected to multiple regulating flow channels 7 in sequence along the circumference. The feed end of the multi-segment composite flow channel 6 is toothed, and the tip of the tooth of the feed end of the multi-segment composite flow channel 6 is provided with a single-segment feed port 20 that communicates with the regulating flow channel 7.

[0038] The feed end of the regulating channel 7 is provided with a first feed port and a second feed port in sequence. The first feed port and the second feed port are respectively connected to the first diversion channel 3 and the second diversion channel 5. The first feed port and the second feed port are respectively equipped with a movable first sealing member 10 and a second sealing member 11.

[0039] The main body 1 is also provided with a connected air intake channel 18 and an air blowing channel 19. A gap is formed between the regulating channels 7 for the air intake channel 18 to pass through, and the air blowing channel 19 is located within the enclosure of the multi-segment composite channels 6.

[0040] In this embodiment, material A and material B flow into the first feed channel 2 and the second feed channel 4 respectively, and then flow into the corresponding regulating channel 7 through multiple first diversion channels 3 and second diversion channels 5 respectively. When the first sealing member 10 blocks the first feed port, material B flows into the regulating channel 7. When the second sealing member 11 blocks the second feed port, material A flows into the regulating channel 7. The materials in each regulating channel 7 are uniformly merged into the multi-segment composite channel 6 from the single-segment feed port 20, spread out in the circumferential direction along the tooth side, and are composited at the tooth bottom junction. Air is blown in the air blowing channel 19 to form a multi-strip spliced ​​cylindrical membrane.

[0041] When materials A and B are different components, if there are two regulating channels 7, a narrow film with stripes arranged as AB can be obtained when the two sides of the cylindrical film are cut open, and a wide film with stripes arranged as ABBA or BAAB can be obtained when one side of the cylindrical film is cut open. If there are three regulating channels 7, a narrow film with stripes arranged as AAA, AAB, ABA, ABB, BAB, BBB can be obtained when the two sides of the cylindrical film are cut open, and a wide film with stripes arranged as AAAAAA, AABBAA, BAAAAB, ABAABA, ABBBBA, BBAABB, BABBAB, BBBBBB can be obtained when one side of the cylindrical film is cut open. On this basis, by increasing the number of regulating channels 7, even more narrow and wide films with stripe arrangements can be obtained.

[0042] See appendix Figure 2-3 The flow direction of the regulating channel 7 is defined as from bottom to top. The second inlet is located above the first inlet and faces the radial direction of the main body 1. The second sealing member 11 passes through the regulating channel 7 and is radially movable relative to the main body 1. The second sealing member 11 is threadedly engaged with the main body 1.

[0043] The end of the second sealing member 11 is provided with a plug 12 and a narrowing section 13 in sequence. The cross-sectional area of ​​the narrowing section 13 is smaller than that of the plug 12 in the vertical direction. The plug 12 is used to block the discharge end of the second diversion channel 5. The discharge end of the second diversion channel 5 has a taper. The plug 12 is spherical and the narrowing section 13 is cylindrical.

[0044] In this embodiment, the first inlet is also oriented radially towards the main body 1, and the discharge end of the first diversion channel 3 is also tapered. The first sealing member 10 and the second sealing member 11 have the same structure and are threadedly engaged with the main body 1. After rotating the corresponding sealing member, the sealing is completed when it comes into contact with the discharge end of the corresponding diversion channel. When the sealing is released, the corresponding sealing member can be rotated out to a certain depth. The flow rate can also be controlled by controlling the rotation depth of the corresponding sealing member.

[0045] The corresponding sealing components can be installed manually or electrically.

[0046] In other alternative embodiments, the first sealing element 10 and the second sealing element 11 can be gates, which are set inside the main body 1. A transmission structure needs to be designed for transmission, such as the gate being connected to a rack. The rotation of the gear drives the meshing rack to move the gate into or out of the corresponding diversion channel. The gear is driven by a handwheel or a motor, and the transmission is relatively complex.

[0047] See appendix Figure 2 The multi-segment composite flow channel 6, the regulating flow channel 7, and the first feed flow channel 2 are arranged vertically in sequence. The first feed flow channel 2 is annular. The second feed flow channel 4 is located within the enclosure of the first feed flow channel 2. The discharge end of the second feed flow channel 4 is higher than the discharge end of the first feed flow channel 2. The second feed inlet is higher than the first feed inlet. The diameter of the multi-segment composite flow channel 6 is larger than the diameter of the first feed flow channel 2.

[0048] In this embodiment, material A is diverted at a low level and flows into the regulating channel 7 at a low level, while material B is diverted at a high level and flows into the regulating channel 7 at a high level, without interfering with each other.

[0049] In other alternative embodiments, both the first feed channel 2 and the second feed channel 4 are columnar; the first feed inlet is higher than the second feed inlet.

[0050] See appendix Figure 2The main body 1 is further provided with a third feed channel 14 and a multi-layer composite channel 15. The second feed channel 4 is annular. The third feed channel 14 has an annular section 16 and a columnar section 17. The diameter of the annular section 16 is larger than the diameter of the columnar section 17. The columnar section 17 is located within the enclosure of the second feed channel 4. The annular section 16 is located within the enclosure of the multi-segment composite channel 6. The multi-layer composite channel 15 is annular. The feed end of the multi-layer composite channel 15 is radially connected to the multi-segment composite channel 6 and the third feed channel 14 in sequence.

[0051] In this embodiment, the third feed channel 14 also has a flow-dividing section and a spiral section. The columnar section 17 is connected to multiple flow-dividing sections in sequence along the circumference. The flow-dividing sections are arranged radially along the main body 1. The spiral section is connected to the flow-dividing sections and is spirally distributed in the vertical direction. The feed end of the annular section 16 is connected to multiple spiral sections in sequence along the circumference.

[0052] Material C flows in from columnar section 17, then is divided into multiple streams into corresponding spiral sections through multiple diversion sections, and finally combines in annular section 16, so that material C flows uniformly upward around annular section 16.

[0053] If each regulating channel 7 is fed, then material C forms a double-layer film as a substrate, improving the film quality.

[0054] If part of the regulating channel 7 does not feed material, and part of the regulating channel 7 simultaneously feeds material A and material B, there will be blank sections in the multi-segment composite channel 6. The multi-segment material will be pulled by the upper cylindrical membrane, and the adjacent segments will disperse towards the blank sections, but will not fill them. At the multi-layer composite channel 15, material C will fill the blank sections, so that there are both three-layer composite of ABC and single-layer C in the membrane width direction, and the membrane thickness is equal. If A is silver material, B is black material, and C is white material, the multi-layer silver surface reflects light and drives the process, the black surface absorbs sunlight, inhibits weed growth, and keeps the membrane warm. The single-layer white material allows sunlight to pass through, allowing crops to grow. A silver-black double-sided membrane is formed on the basis of the black and white alternating membrane.

[0055] See appendix Figure 1-24-6, the main body 1 includes a distributor 21, an adjusting cylinder 22, a compounder 23, and a mold cylinder 24. The compounder 23 and the adjusting cylinder 22 are arranged vertically in sequence, and together they form the adjusting flow channel 7. The distributor 21 is provided with a first feed flow channel 2 and a second feed flow channel 4. The adjusting cylinder 22 is provided with a first diversion flow channel 3, a second diversion flow channel 5, and a stepped hole 25. The stepped hole 25 is for the discharge end of the distributor 21 to be inserted and fitted. The wall of the large hole of the stepped hole 25 is provided with a first diversion port 9 communicating with the first diversion flow channel 3, and the wall of the small hole of the stepped hole 25 is provided with a second diversion port 8 communicating with the second diversion flow channel 5. The first diversion flow channel 3 and the second diversion flow channel 5 are arranged radially along the main body 1. The mold cylinder 24 is sleeved outside the compounder 23, and the multi-segment compound flow channel 6 is formed between the mold cylinder 24 and the compounder 23.

[0056] In this embodiment, the diverter 21 includes a diverter core and an end sleeve. The end sleeve is inserted into the diverter core and is used to cooperate with the stepped hole 25 of the regulating cylinder 22 to form two annular diverter grooves. The diverter core and the end sleeve are provided with a columnar second feed channel 4. The diverter core is provided with a first feed channel 2 on the outer periphery of the first feed channel 2. The feed port corresponding to the first feed channel 2 is provided on the side of the diverter core and is connected to a screw. The feed port corresponding to the second feed channel 4 can be provided on the side of the diverter core or on the bottom surface of the diverter core and is connected to another screw.

[0057] The regulating cylinder 22 is machined from the side to provide channels for the expansion and contraction of the corresponding sealing components and corresponding diversion channels. The regulating cylinder 22 is machined from the top surface to provide regulating channels 7. The regulating channels 7 and the diversion channels are located in the same radial direction to achieve communication.

[0058] The bottom surface of the composite device 23 is machined with corresponding adjustment channels 7. The mold cylinder 24 is fitted outside the composite device 23 to form multiple composite channels 6. The exposed side of the composite device 23 is provided with an air inlet corresponding to the air inlet channel 18. The composite device 23 is provided with an air inlet channel 18 and an air passage chamber. The core mold is covered with a mold cover. The mold cover is provided with a blowing channel 19 and a blown film channel connected to the multiple composite channels 6.

[0059] When the third feed channel 14 is added, the diverter core is divided into an inner core and an outer core. The outer core is sleeved on the inner core, and the end sleeve is inserted and fitted with the outer core, sleeved outside the inner core. The diverter 21 also includes a feed cylinder, which is sleeved on the outer core. The feed cylinder and the outer core form a first feed channel 2, and the outer core and the inner core form a second feed channel 4. The inner core is provided with a columnar third feed channel 14, with three feed ports connected to three screws. The feed ports corresponding to the third feed channel 14 are located at the bottom of the inner core or on the side of the feed cylinder. The outer circumference of the outer core is provided with a feed trough for material to flow in and be lifted. The feed trough is U-shaped at the bottom, and then the two side walls of the trough are inclined and connected at the highest point along the circumference of the outer core, so that the material can gradually rise along the trough wall and spread out in the circumference, and finally flow along the annular first feed channel 2. The inner core is the same.

[0060] The composite device 23 includes an inner sleeve and a core mold. The inner sleeve is fitted outside the core mold, and the mold cylinder 24 is fitted outside the inner sleeve. Multiple composite flow channels 6 are formed between the mold cylinder 24 and the inner sleeve. The inner sleeve and the core mold are machined to form the discharge end of the regulating flow channel 7. Spiral and annular sections 16 are formed between the inner sleeve and the core mold. The core mold is machined to form the discharge end of the diversion section and columnar section 17. Multi-layer composite flow channels 15 are formed between the mold cover and the mold cylinder 24.

[0061] The above description represents the preferred embodiment of this utility model. It should be noted that the protection scope of this utility model is not limited thereto. For those skilled in the art, various improvements, modifications, or equivalent substitutions can be made without departing from the equivalent inventive concept disclosed in this utility model, and these modifications and substitutions are also considered to be within the protection scope of this utility model.

Claims

1. A multi-segment composite blown film die head, characterized in that: Includes a main body (1), and the main body (1) contains a... The first feed channel (2) has multiple first branch channels (3) connected to its discharge end. The second feed channel (4) has multiple second branch channels (5) connected to its discharge end. The multi-segment composite flow channel (6) is annular, and the feed end of the multi-segment composite flow channel (6) is connected to multiple regulating flow channels (7) in sequence along the circumference. The regulating channel (7) has a first feed port and a second feed port in sequence at its feed end. The first feed port and the second feed port are respectively connected to the first diversion channel (3) and the second diversion channel (5). The first feed port and the second feed port are respectively equipped with a movable first sealing element (10) and a second sealing element (11).

2. The multi-segment composite blown film die head as described in claim 1, characterized in that: The flow direction of the regulating channel (7) is defined as from bottom to top. The second feed inlet is located above the first feed inlet. The second feed inlet faces the radial direction of the main body (1). The second sealing member (11) passes through the regulating channel (7) and is radially movable relative to the main body (1). The end of the second sealing member (11) is provided with a plug (12) and a narrowing section (13) in sequence. The cross-sectional area of ​​the narrowing section (13) is smaller than the cross-sectional area of ​​the plug (12) in the vertical direction. The plug (12) is used to block the discharge end of the second diversion channel (5).

3. The multi-segment composite blown film die head as described in claim 2, characterized in that: The second sealing element (11) is threadedly engaged with the main body (1).

4. The multi-segment composite blown film die head as described in claim 2, characterized in that: The discharge end of the second diversion channel (5) is tapered, the plug (12) is spherical, and the narrowing section (13) is columnar.

5. The multi-segment composite blown film die head as described in claim 1, characterized in that: The multi-segment composite flow channel (6), the regulating flow channel (7), and the first feed flow channel (2) are arranged vertically in sequence. The first feed flow channel (2) is annular. The second feed flow channel (4) is located within the enclosure of the first feed flow channel (2). The discharge end of the second feed flow channel (4) is higher than the discharge end of the first feed flow channel (2). The second feed inlet is higher than the first feed inlet.

6. The multi-segment composite blown film die head as described in claim 5, characterized in that: The diameter of the multi-segment composite flow channel (6) is larger than the diameter of the first feed flow channel (2).

7. The multi-segment composite blown film die head as described in claim 5, characterized in that: The main body (1) is further provided with a third feed channel (14) and a multi-layer composite channel (15). The second feed channel (4) is annular. The third feed channel (14) has an annular section (16) and a columnar section (17). The diameter of the annular section (16) is larger than the diameter of the columnar section (17). The columnar section (17) is located within the enclosure of the second feed channel (4). The annular section (16) is located within the enclosure of the multi-segment composite channel (6). The multi-layer composite channel (15) is annular. The feed end of the multi-layer composite channel (15) is radially connected to the multi-segment composite channel (6) and the third feed channel (14).

8. The multi-segment composite blown film die head as described in claim 1, characterized in that: The main body (1) is also provided with a connected air intake channel (18) and an air blowing channel (19). A gap is formed between the regulating channels (7) for the air intake channel (18) to pass through. The air blowing channel (19) is located within the enclosure of the multi-segment composite channels (6).

9. The multi-segment composite blown film die head as described in claim 1, characterized in that: The feed end of the multi-segment composite flow channel (6) is toothed, and the tip of the tooth of the feed end of the multi-segment composite flow channel (6) is provided with a single-segment feed port (20) that communicates with the regulating flow channel (7).

10. The multi-segment composite blown film die head as described in claim 5, characterized in that: The main body (1) includes a flow divider (21), an adjusting cylinder (22), a compounder (23), and a mold cylinder (24). The compounder (23) and the adjusting cylinder (22) are arranged vertically in sequence, and the compounder (23) and the adjusting cylinder (22) together form the adjusting flow channel (7). The flow divider (21) is provided with a first feed flow channel (2) and a second feed flow channel (4). The adjusting cylinder (22) is provided with a first flow divider (3), a second flow divider (5), and a stepped hole (25). The discharge end of the diverter (21) is inserted and fitted. The wall of the large hole of the stepped hole (25) is provided with a first diverting port (9) that communicates with the first diverting channel (3). The wall of the small hole of the stepped hole (25) is provided with a second diverting port (8) that communicates with the second diverting channel (5). The first diverting channel (3) and the second diverting channel (5) are arranged radially along the main body (1). The mold cylinder (24) is sleeved outside the composite device (23). The multi-segment composite channel (6) is formed between the mold cylinder (24) and the composite device (23).

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