CN216968612U - Shunt shuttle and double-layer die head - Google Patents

Abstract

The utility model discloses a shunt shuttle and a double-layer die head, wherein the double-layer die head comprises the shunt shuttle, and the shunt shuttle comprises: a splitter column and an outer ring body. The shunting shuttle is provided with an inner shunting channel and an outer shunting channel which both extend along the axial direction of the shunting column, and the outer ring body is also provided with an annular groove communicated with the outer shunting channel. The shunting shuttle with the structure has the advantages that the two layers of runners are closely distributed and can be coaxially distributed with the mold core, the center distance of the mold cavity can be reduced, and the occupied space is reduced; the outer branch runners are annularly distributed and the annular grooves enable plastic fluid to flow and be distributed more uniformly, so that the density of a die blank is uniform. Adopt above-mentioned shunt shuttle's double-deck die head includes: die body, mold core assembly and the reposition of redundant personnel shuttle of foretell. The split-flow shuttle and the mold core component are coaxially arranged in the mold body, the structure is compact, the occupied space can be reduced during the arrangement of the multiple mold heads, the production of small-volume plastic bottle products is facilitated, and the production efficiency is improved.

Description

Shunt shuttle and double-layer die head

Technical Field

The utility model relates to the field of blow molding, in particular to a shunt shuttle and a double-layer die head.

Background

Blow molding is a widely used plastic molding technique for making plastic bottles, in which a mold base is extruded through a blow mold head and then blow molded. At present, the design layout of a mold cavity of the existing blow molding device is unreasonable, the occupied space is large, in multi-mold-head equipment, the interval between different mold heads is large, the space waste is more when plastic bottle products with small production volume are produced, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the flow dividing shuttle, the flow passages are distributed compactly and can be arranged coaxially with the mold core, and the center distance of the mold cavity is reduced.

The utility model also provides a double-layer die head comprising the shunting shuttle, which has a compact structure, can be produced in a multi-die head layout mode, and improves the production efficiency.

A shunt shuttle according to an embodiment of the first aspect of the present invention includes: a splitter column and an outer ring body. The outer ring body is arranged on the periphery of the flow dividing column, an inner diversion channel extending along the axial direction of the flow dividing column is arranged between the outer ring body and the flow dividing column, at least two outer diversion channels extending along the axial direction of the flow dividing column are arranged on the outer ring body, the at least two outer diversion channels are annularly distributed on the outer ring body, and an annular groove capable of communicating the different outer diversion channels is further formed in the outer ring body.

The shunt shuttle provided by the embodiment of the utility model at least has the following beneficial effects: the split-flow shuttle is provided with an inner split-flow channel and an outer split-flow channel which are distributed along the axial direction of the split-flow column, the layout is compact, the split-flow shuttle can be coaxially arranged with the mold core, the center distance of the mold cavity can be effectively reduced, and the occupied space is reduced. Set up at least two outer subchannel can make the more even of plastics fluid flow dispersion, sets up the ring channel can further make the abundant flow of plastics fluid mix, makes plastics fluid density distribution more even.

According to some embodiments of the present invention, the outer wall of the splitter column is provided with a connecting block, the outer ring body is disposed at the outer circumference of the splitter column through the connecting block, and a gap is formed between the outer ring body and the splitter column to form the inner splitter channel.

According to some embodiments of the utility model, two of the annular grooves are respectively located at the upper end and the lower end of the outer ring body, and both of the two annular grooves are communicated with all of the outer branch channels.

The double-layer die head comprises a die body, a die core assembly and the shunting shuttle according to the embodiment of the first aspect of the utility model, wherein a die cavity is arranged in the die body, the shunting shuttle is arranged in the die cavity, the die body is also provided with a first feeding hole and a second feeding hole which can be used for injecting fluid, the first feeding hole is communicated with the inner shunting channel, the second feeding hole is communicated with the outer shunting channel, the die core assembly is arranged in the die cavity and is connected with the shunting shuttle, the double-layer die head is provided with an outer fluid channel and an inner fluid channel which are axially distributed along the die core assembly, and the outer fluid channel and the inner fluid channel are converged at the lower end of the die core assembly to form a converging channel.

The double-layer die head provided by the embodiment of the utility model has at least the following beneficial effects: by adopting the shunting shuttle in the embodiment of the first aspect of the utility model, the shunting shuttle and the mold core assembly are coaxially arranged, so that the center distance of the mold cavity between the mold head and the mold head can be reduced, the layout of the multiple mold heads is more compact, the occupied space is reduced, the production of small-volume plastic bottle products is facilitated, and the production efficiency is improved.

According to some embodiments of the utility model, the core assembly comprises: the core rod and an outer sleeve part sleeved on the core rod are connected with the flow dividing column, a gap is formed between the core rod and the outer sleeve part to form an inner flow guide channel, the inner flow guide channel is communicated with the inner flow guide channel to form an inner fluid channel, the outer sleeve part is provided with flow guide holes which are distributed annularly and correspond to the outer flow guide channel, one end of each flow guide hole is communicated with the outer flow guide channel, the outer sleeve part is provided with a gap with the inner wall of the die cavity to form an outer flow guide channel, the other end of each flow guide hole is communicated with the outer flow guide channel, and the outer flow guide channel, the flow guide holes and the outer flow guide channel are sequentially communicated to form the outer fluid channel.

According to some embodiments of the utility model, the first inlet port and the second inlet port are each provided with an adjustment member capable of adjusting the fluid flow of the first inlet port and the second inlet port.

According to some embodiments of the utility model, a gas channel is further provided, which is distributed along the axial direction of the mold core assembly, and the mold body is provided with a first gas inlet hole communicated with the gas channel.

According to a further embodiment of the present invention, the gas channel includes a gas cavity disposed in the flow dividing column and a gas guiding channel disposed in the mold core assembly, and the first gas inlet hole, the gas cavity and the gas guiding channel are sequentially communicated to form the gas channel.

According to some embodiments of the present invention, the mold further comprises an adjusting device, the adjusting device comprises a cover body connected to the mold body, an adjusting sleeve is arranged in the cover body, a core mold is arranged in the adjusting sleeve, a gap is formed between the core mold and the adjusting sleeve to form a mold outlet channel, the mold outlet channel is communicated with the confluence channel, and the adjusting sleeve can adjust the coaxiality of the mold outlet channel and the confluence channel.

According to some embodiments of the utility model, the weight adjusting device further comprises a weight adjusting mechanism, the weight adjusting mechanism comprises an adjusting component arranged on the die body, the adjusting component is provided with a guide rod, the lower end of the guide rod is fixedly connected with a base, the base is slidably connected with the die body, the cover body is arranged on the base, and the adjusting component can adjust the relative position between the cover body and the core die.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a diverter shuttle according to an embodiment of the present invention;

FIG. 2 is a top view of a torpedo of an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a two-layer die of an embodiment of the present invention;

fig. 4 is a schematic structural view of a regulating device of a double-layer die according to an embodiment of the present invention.

Reference numerals:

the flow dividing column 100, the internal flow dividing channel 110, the air cavity 120 and the connecting block 130;

an outer ring body 200, an outer branch flow passage 210, an annular groove 220, and second air inlet holes 230;

the die body 300, the first feeding hole 310, the second feeding hole 320, the adjusting piece 330, the first air inlet hole 340, the feeding body 350, the feeding cavity 351 and the feeding groove 352;

the mandrel 400, the gas guide channel 401, the outer sleeve member 410, the guide hole 411, the inner guide channel 420 and the outer guide channel 430;

a manifold channel 500;

the cover body 600, the core sleeve 610, the wedge block 620, the core mold 630 and the mold stripping passage 640;

connecting plate 700, guide rod 710, base 720.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 and 2, a shunt shuttle according to an embodiment of the first aspect of the present invention includes: a splitter column 100 and an outer ring 200. The outer ring body 200 is arranged on the periphery of the shunt column 100, an inner shunt channel 110 axially extending along the shunt column 100 is arranged between the outer ring body 200 and the shunt column 100, the outer ring body 200 is provided with at least two outer shunt channels 210 axially extending along the shunt column 100, the at least two outer shunt channels 210 are annularly distributed on the outer ring body 200, and the outer ring body 200 is further provided with annular grooves capable of communicating different outer shunt channels 210.

Through the structure, the embodiment of the utility model at least has the following beneficial effects: the shunting shuttle is provided with the inner shunting channel 110 and the outer shunting channel 210 which are distributed along the axial direction of the shunting column 100, the layout is compact, the shunting shuttle can be coaxially arranged with the mold core, the center distance of the mold cavity can be effectively reduced, and the occupied space is reduced. Simultaneously, set up two at least outer subchannel can make the more even of plastics fluid flow dispersion, sets up the ring channel can further make the abundant flow of plastics fluid mix, makes plastics fluid density distribution more even.

Specifically, the shunt shuttle includes: a splitter column 100 and an outer ring 200. The inlet end of the splitter 100 is tapered to facilitate fluid flow. The outer ring 200 is disposed around the splitter 100, and the inner runner 110 is disposed between the outer ring 200 and the splitter 100 and extends along the axial direction of the splitter 100. The outer branch channels 210 are disposed with six annular grooves distributed in the outer ring body 200 and extending along the axial direction of the splitter column 100, and the annular groove 220 is disposed on the outer ring body 200 and can be communicated with all the outer branch channels 210. When the user uses the flow divider 100, the fluid is guided to flow into the inner diversion channel 110 to form the inner layer fluid. Another fluid enters and fills the annular groove 220 and then enters the outer sub-runner 210 to form an outer layer of fluid.

Referring to fig. 1 and 2, in some embodiments of the present invention, a connection block 130 is disposed on an outer wall of the splitter column 100, an outer ring body 200 is disposed on an outer circumference of the splitter column 100 through the connection block 130, and a gap is formed between the outer ring body 200 and the splitter column 100 to form an inner branch flow passage 110. The connecting block 130 is tapered near the feed end and has the function of draining fluid.

Specifically, the outer ring body 200 is disposed at the outer circumference of the splitter column 100 through two connection blocks 130. The gap between the two connection blocks 130 forms the inner division flow path 110. The two connection blocks 130 are provided to enable the outer ring 200 to be more stably connected to the flow distribution column 100 without affecting the flow efficiency of the inner flow distribution channel 110.

It should be noted that, in the implementation process, the number of the connecting block 130 and the external branch channels 210 may be changed according to the actual requirement of the user. Connecting block 130 still can replace to set up to other structures that play the connection effect such as connecting bolt, draw-in groove fastener, specifically chooses which kind of structure for use, selects according to user's actual demand.

Referring to fig. 1, 2 and 3, in a further embodiment of the present invention, two annular grooves 220 are provided at the upper and lower ends of the outer ring body 200, respectively, and both annular grooves 220 communicate with all of the outer branch channels 210. The annular groove 220 can fully mix the outer layer fluid entering the shunting shuttle, so that the fluid density distribution of the outer shunting passage is more uniform.

Specifically, two annular grooves 220 are provided, respectively at both ends of the outer branch passage 210. When the user uses, the fluid firstly enters the annular groove 220 and is fully mixed, so that the density distribution is uniform, then enters the outer sub-flow passage 210, flows out of the outer sub-flow passage 210, and enters the annular groove 220 again for secondary mixing, and the uniformity of the fluid density is further improved.

Referring to fig. 3, a two-layer die according to an embodiment of the second aspect of the present invention includes a die body 300, a core assembly and a diverter according to an embodiment of the first aspect of the present invention described above. The die body 300 is internally provided with a die cavity, the shunt shuttle is arranged in the die cavity, the die body 300 is further provided with a first feeding hole 310 and a second feeding hole 320 which can be used for injecting fluid, the first feeding hole 310 is communicated with the internal shunt passage 110, the second feeding hole 320 is communicated with the external shunt passage 210, the die core assembly is arranged in the die cavity and is connected with the shunt shuttle, the double-layer die head is provided with an external fluid passage and an internal fluid passage which are axially distributed along the die core assembly, and the external fluid passage and the internal fluid passage are converged at the lower end of the die core assembly to form a converging passage 500.

By adopting the structure and the shunting shuttle of the embodiment of the first aspect of the utility model, the shunting shuttle and the die core component are coaxially arranged, so that the center distance of a die cavity between the die head and the die head can be reduced, the layout of the multiple die heads is more compact, the occupied space is reduced, the production of small-volume plastic bottle products is facilitated, and the production efficiency is improved.

Specifically, a mold cavity is disposed in the mold body 300, and a feeding body 350 is further disposed in the mold body 300. The feeding body 350 is provided with a feeding cavity 351 corresponding to the shape of the splitter 100 and a feeding groove 352 distributed annularly. The inlet chamber 351 is connected to the first inlet hole 310 and the inner fluid passage 110 in turn to constitute a part of the inner fluid passage. The feeding groove 352 is sequentially communicated with the second feeding hole 320 and the outer branch channel 210 to form a part of the outer fluid channel. The outer and inner fluid passages meet at the lower end of the core assembly to form a manifold 500.

It should be noted that, in the specific implementation process, the feeding body 350 and the shunting shuttle can be integrally formed, so that the better sealing performance can be achieved, and which structure is specifically selected is selected according to the actual needs of the user.

Referring to FIG. 3, in some embodiments of the present invention, a core assembly comprises: the mandrel 400 and the outer sleeve member 410 sleeved on the mandrel 400, the mandrel 400 is connected with the diversion column 100, a gap is formed between the mandrel 400 and the outer sleeve member 410 to form an inner diversion channel 420, the inner diversion channel 110 is communicated with the inner diversion channel 420 to form an inner fluid channel, the outer sleeve member 410 is provided with diversion holes 411 which are annularly distributed and correspond to the outer diversion channel 210, one end of each diversion hole 411 is communicated with the outer diversion channel 210, a gap is formed between the outer sleeve member 410 and the inner wall of the die cavity to form an outer diversion channel 430, the other end of each diversion hole 411 is communicated with the outer diversion channel 430, and the outer diversion channel 210, the diversion holes 411 and the outer diversion channel 430 are sequentially communicated to form an outer fluid channel. The inner fluid channel and the outer fluid channel are both tightly distributed along the axial direction of the core rod 400, so that the occupied volume can be reduced, and the multi-die arrangement production is facilitated.

Specifically, the core assembly includes: a core rod 400 and an outer sleeve member 410 that fits over the core rod 400. The core rod 400 is screwed to the splitter cylinder 100, and the outer sleeve 410 is connected to the outer ring body in an interference fit manner. The mandrel 400 and the outer sleeve member 410 have a gap therebetween to form an inner flow leader 420. The inner diversion channel 110 is communicated with the inner flow guide channel 420 to form an inner fluid channel, and the fluid flows through the inner diversion channel 110 and the inner flow guide channel 420 to form inner layer fluid. The upper part of the outer sleeve 410 is provided with six annularly distributed flow guide holes 411, one ends of the flow guide holes 411 are communicated with the outer flow guide channels 210, the lower part of the outer sleeve 410 has a gap with the inner wall of the mold cavity to form outer flow guide channels 430, the other ends of the six flow guide holes 411 are all communicated with the outer flow guide channels 430, the outer flow guide channels 210, the flow guide holes 411 and the outer flow guide channels 430 are sequentially communicated to form outer fluid channels, and fluid flows through the outer fluid channels to form outer layer fluid. The inner and outer fluids meet at the lower end of the outer sleeve 410 and are extruded by the manifold 500 to form a double layer fluid.

It should be noted that, in the specific implementation process, the outer flow guide 430 may be further embedded in the outer sleeve 410, and specifically, which manner is adopted is selected according to the actual needs of the user.

Referring to fig. 3, in some embodiments of the present invention, the first feed hole 310 and the second feed hole 320 are each provided with an adjusting member 330, and the adjusting member 330 is capable of adjusting the fluid flow rate of the first feed hole 310 and the second feed hole 320. The user can control the fluid flow rate through the adjustment member 330.

Specifically, the first and second inlet holes 310 and 320 are each provided with an adjuster 330. The adjusting member 330 is an adjusting bolt. When the user uses the device, the fluid flow of the first feeding hole 310 and the second feeding hole 320 is adjusted by rotating the adjusting bolt.

It should be noted that, in the specific implementation process, the adjusting bolt may be alternatively set as an adjusting device capable of opening or closing the fluid channel, such as a throttle valve, a half-ball valve, and the like, specifically which adjusting device is selected, and is selected according to the actual needs of the user.

Referring to fig. 3, in some embodiments of the present invention, gas passages are further provided along the axial direction of the core assembly, and the mold body 300 is provided with first gas inlet holes 340 communicating with the gas passages. The air channel is arranged to allow air to be introduced, blow the blow molding hole open when the mold blank is separated, and facilitate the blow molding in the next step.

Specifically, the double-layer die head is provided with gas channels distributed along the axial direction of the die core assembly, and the die body 300 is provided with first gas inlet holes 340 communicated with the gas channels. When the blow molding machine is used by a user, a gas source is introduced into the first gas inlet hole 340, and the gas flows through the gas channel to blow open the blow molding opening when the mold blank is extruded and divided, so that the blow molding machine is prepared for the next step of blow molding.

Referring to fig. 1 and 3, in some embodiments of the present invention, the gas channel includes a gas chamber 120 disposed in the flow dividing pillar 100 and a gas guide channel 401 disposed in the mold core assembly, and the first gas inlet hole 340, the gas chamber 120 and the gas guide channel 401 are sequentially communicated to form the gas channel. The gas channel is arranged in the double-layer die head, so that the occupied space can be reduced, and the space utilization rate is improved.

Specifically, an air cavity 120 is arranged in the flow dividing column 100, the outer ring body 200 is provided with second air inlet holes 230 communicated with the air cavity 120, the outer ring body 200 is provided with annularly distributed grooves, and the second air inlet holes 230 are located in the grooves. The groove and the inner wall of the mold cavity form an annular air passage, and the first air inlet holes 340 are communicated with the second air inlet holes 230 through the annular air passage. When the user uses the air-saving device, the air enters from the first air inlet hole 340, flows through the annular air passage, enters the air cavity 120 from the second air inlet hole 230, and is blown out from the air guide passage 401.

Referring to fig. 3 and 4, in some embodiments of the present invention, the present invention further includes an adjusting device, the adjusting device includes a cover body 600 connected to the mold body 300, an adjusting sleeve is disposed in the cover body 600, a core mold 630 is disposed in the adjusting sleeve, a gap is formed between the core mold 630 and the adjusting sleeve to form a mold outlet 640, the mold outlet 640 is communicated with the collecting duct 500, and the adjusting sleeve can adjust the coaxiality between the mold outlet 640 and the collecting duct 500, so that the circumferential thickness distribution of the mold blank is uniform.

Specifically, the adjusting device includes: the adjustment device includes a cover 600 coupled to the mold body 300. Be provided with in the lid 600 and adjust the external member, adjust the external member and include: core housing 610 and wedge 620. The core sleeve 610 is movably disposed in the cover body 600, and a core mold 630 connected to the core assembly is disposed in the core sleeve 610. The wedge 620 is movably disposed between the cover 600 and the core housing 610 and is capable of adjusting the position of the core housing 610 relative to the core mold 630. A gap is provided between the core sleeve 610 and the core mold 630 to form a mold exit 640. When the die is used by a user, the wedge block 620 can be adjusted through the adjusting bolt, so that the position of the core sleeve 610 is adjusted, the coaxiality of the die outlet channel 640 and the bus channel 500 is adjusted, and the circumferential thickness distribution of the extruded die blank is uniform.

It should be noted that, in the implementation, the core housing 610 may be adjusted directly by the adjusting bolt without providing the wedge 620.

Referring to fig. 3, in some embodiments of the present invention, the present invention further includes a weight adjusting mechanism, the weight adjusting mechanism includes an adjusting assembly disposed on the mold body 300, the adjusting assembly is provided with a guide rod 710, a base 720 is fixedly connected to a lower end of the guide rod 710, the base 720 is slidably connected to the mold body 300, the cover body 600 is mounted on the base 720, and the adjusting assembly can adjust a relative position between the cover body 600 and the core mold 630. The user can adjust the body thickness of mould base through transferring heavy mechanism according to self demand, and then the weight of control mould base.

Specifically, the weight adjusting mechanism includes an adjusting assembly disposed at an upper end of the mold body 300. The adjustment assembly includes an adjustment nut, a stud, and a connection plate 700. The connecting plate 700 is coupled to a base 720 via guide rods 710, the base 720 being slidably coupled to the mold body 300. The cover 600 is fixedly mounted on the base 720. When the die blank weight adjusting device is used by a user, the adjusting nut can be rotated to adjust the up-and-down movement of the base 720 relative to the die body 300, the cover body 600 can move up and down along with the base 720, the size of the die discharging channel 640 between the cover body 600 and the core die 630 can be changed along with the adjustment, and the thickness of the die blank is further controlled to adjust the weight of the die blank.

It can be understood that, in the specific implementation process, the adjusting nut and the stud can be alternatively set to be a structure of the latch and the rack or directly set an adjustable cylinder to achieve the same adjusting effect, and which structure is specifically adopted is selected according to the actual requirements of customers.

Other configurations and operations of a bilayer die according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, if reference is made to the description of "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", and "some examples", etc., reference is made to the terminology, it is intended that a particular feature, structure, material, or characteristic described in connection with the embodiment or example be included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A diverter shuttle, comprising:

a splitter column (100);

outer annular body (200), outer annular body (200) set up in reposition of redundant personnel post (100) periphery, outer annular body (200) with be provided with between reposition of redundant personnel post (100) along reposition of redundant personnel post (100) axial extension's interior diversion channel (110), outer annular body (200) are provided with the edge at least two outer diversion channels (210) of reposition of redundant personnel post (100) axial extension, at least two outer diversion channel (210) ring distribution in outer annular body (200), outer annular body (200) still are provided with and can communicate differently the ring channel of outer diversion channel (210).

2. The shunt shuttle of claim 1, wherein the outer wall of the shunt post (100) is provided with a connecting block (130), the outer ring body (200) is disposed at the outer circumference of the shunt post (100) through the connecting block (130), and a gap is provided between the outer ring body (200) and the shunt post (100) to form the inner shunt passage (110).

3. The shuttle as claimed in claim 1, wherein there are two of said annular grooves (220) respectively located at the upper and lower ends of said outer ring body (200), both of said annular grooves (220) communicating with all of said outer runners (210).

4. A double-layer die head, comprising a die body (300), a die core assembly and the diverter shuttle according to any one of claims 1 to 3, wherein a die cavity is arranged in the die body (300), the diverter shuttle is arranged in the die cavity, the die body (300) is further provided with a first feeding hole (310) and a second feeding hole (320) which can be used for injecting fluid, the first feeding hole (310) is communicated with the inner diversion channel (110), the second feeding hole (320) is communicated with the outer diversion channel (210), the die core assembly is arranged in the die cavity and is connected with the diverter shuttle, the double-layer die head is provided with an outer fluid channel and an inner fluid channel which are axially distributed along the die core assembly, and the outer fluid channel and the inner fluid channel are converged at the lower end of the die core assembly to form a confluence channel (500).

5. The double-layer die head of claim 4, wherein the core assembly comprises a core rod (400) and an outer sleeve member (410) sleeved on the core rod (400), the core rod (400) is connected with the diversion column (100), a gap is formed between the core rod (400) and the outer sleeve member (410) to form an inner diversion channel (420), the inner diversion channel (110) is communicated with the inner diversion channel (420) to form the inner fluid channel, the outer sleeve member (410) is provided with diversion holes (411) which are annularly distributed and correspond to the outer diversion channel (210), one ends of the diversion holes (411) are communicated with the outer diversion channel (210), the outer sleeve member (410) is provided with a gap with the inner wall of the die cavity to form an outer diversion channel (430), the other ends of the diversion holes (411) are communicated with the outer diversion channel (430), and the outer diversion channel (210), The guide holes (411) are sequentially communicated with the outer guide channels (430) to form the outer fluid channel.

6. The double layer die of claim 4, wherein the first inlet holes (310) and the second inlet holes (320) are each provided with an adjusting member (330), and the adjusting members (330) are capable of adjusting the flow rates of the first inlet holes (310) and the second inlet holes (320).

7. The double layer die of claim 4, further provided with gas passages axially distributed along the core assembly, and the die body (300) is provided with first gas inlet holes (340) communicating with the gas passages.

8. The double-layer die head according to claim 7, wherein the gas channel comprises a gas cavity (120) arranged in the distribution column (100) and a gas guide channel (401) arranged in the die core assembly, and the first gas inlet hole (340), the gas cavity (120) and the gas guide channel (401) are sequentially communicated to form the gas channel.

9. The dual layer die of claim 4, further comprising an adjustment device, wherein the adjustment device comprises a cover body (600) connected to the die body (300), an adjustment sleeve is arranged in the cover body (600), a core die (630) is arranged in the adjustment sleeve, a gap is formed between the core die (630) and the adjustment sleeve to form a die outlet channel (640), the die outlet channel (640) is communicated with the manifold channel (500), and the adjustment sleeve can adjust the coaxiality of the die outlet channel (640) and the manifold channel (500).

10. The double-layer die head of claim 9, further comprising a weight adjusting mechanism, wherein the weight adjusting mechanism comprises an adjusting component arranged on the die body (300), the adjusting component is provided with a guide rod (710), a base (720) is fixedly connected to the lower end of the guide rod (710), the base (720) is slidably connected with the die body (300), the cover body (600) is mounted on the base (720), and the adjusting component can adjust the relative position between the cover body (600) and the core die (630).

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