Multilayer spiral superimposed co-extrusion high barrier blown film die

Abstract

The application provides a multilayer spiral superimposed co-extrusion high-barrier blown film die head, which comprises a die core body, the outer side of the die core body is provided with spiral discs A, B, C, D, E and F which are stacked one above another in sequence, the top surface of the spiral disc A is provided with a stepped center hole, the step of the stepped center hole is provided with a flow distribution disc, the top surface of the flow distribution disc is provided with a distribution body, the top surface of the distribution body is provided with a spiral body, an a-material channel is arranged between the spiral body and the die core body, a b-material channel is arranged between the distribution body and the spiral body, five separate feeding channels are arranged between the six spiral discs, respectively, and an annular composite flow channel is formed between the six spiral discs, the distribution body, the spiral body and the die core body, a die head is connected to the top surface of the die core body, a die head adjusting ring is connected to the top surface of the spiral disc F, and an annular extrusion channel is formed between the die head and the die head adjusting ring. The application effectively reduces the overall height and outer diameter of the whole die head.

Description

Technical Field

[0001] This invention relates to a blown film die, and more particularly to a multi-layer spiral superimposed co-extrusion high-barrier blown film die. Background Technology

[0002] Currently, multi-layer circular die heads have two structures: planar stacked structure and center-feed structure. The planar stacked structure consists of multiple stacked discs with multi-level distributed vortex-like flow channels on the upper and lower surfaces. A circular hole of a specific size is located in the center of the disc, which fits onto a mandrel of a specific size. The outer surface of the mandrel and the inner diameter of the disc together form a vertically converging flow channel. This type of flow channel, when stacked in multiple layers, often results in an excessively high overall height.

[0003] The center-feed structure includes a disc-shaped feed plate and multiple layers of sleeves. The disc-shaped feed plate typically has multiple inclined cylindrical flow channels, evenly distributed radially in a lotus-like pattern around the axis. The annular sleeves generally have spiral flow channels designed on their outer surface, with the depth of the spiral flow channels gradually decreasing. Finally, the multiple nested sleeves converge at a certain vertical position to form a vertical converged flow channel. This type of flow channel often results in an excessively large overall outer diameter due to the multiple layers being stacked. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a multi-layer spiral superimposed co-extrusion high-barrier blown film die, which has a novel structure and can extrude multi-layer composite dense cylindrical films, effectively reducing the overall height and outer diameter of the entire die.

[0005] The technical solution of this invention is a multi-layer spiral superimposed co-extrusion high-barrier blown film die head, characterized in that: it includes a die core body, on the outer side of which are arranged spiral disks A, B, C, D, E, and F stacked sequentially; a stepped center hole is provided at the center of the top surface of spiral disk A, a flow divider is provided at the step of the stepped center hole, a distribution body is provided on the top surface of the flow divider, and a spiral body is provided on the top surface of the distribution body; the die core body passes through the spiral body center hole, the distribution body center hole, the flow divider center hole, and the stepped center hole of spiral disk A sequentially from top to bottom; a spacer is provided between the spiral body and the die core body. Material channel a, material channel b, material channel c, material channel d, material channel e, material channel f, material channel g, material channel g, are provided between the six spiral discs, the distribution body, the spiral body, and the die core. The die core is connected to a die on its top surface, and a die adjusting ring is connected to the top surface of the spiral disc F. The die and the die adjusting ring form an annular extrusion channel.

[0006] Preferably, the top surface of the die core is connected to a die transition body, the die includes die A and die B, the top surface of the die transition body is connected to die A, the top surface of die A is connected to die B, the top surface of the spiral disk F is connected to an adjusting ring transition body, the die adjusting ring includes adjusting ring A and adjusting ring B, the outer region of the top surface of the adjusting ring transition body is connected to adjusting ring A, the inner region of the top surface of the adjusting ring transition body is connected to adjusting ring B, an annular variable diameter flow channel is formed between the die transition body and the adjusting ring transition body, and an annular shaping extrusion channel is formed between the die and the die adjusting ring.

[0007] Preferably, the top of the adjustment ring A is connected to a series of fine-tuning mechanisms, all of which are evenly distributed at equal angles along the circumference. The top surface of the adjustment ring B extends upward to form an annular sidewall. The inner surface of the annular sidewall and the outer surface of the die form an annular shaping channel. The outer surface of the annular sidewall extends to form a series of shaping blocks evenly distributed along the circumference. The front end of each fine-tuning mechanism is connected to a shaping block. The fine-tuning mechanism is used to pull or push the shaping block to achieve fine-tuning of the gap in the annular shaping channel.

[0008] Preferably, the fine-tuning mechanism includes a connecting block, a fine-tuning screw, and a hook. The connecting block is connected to the adjusting ring A by screws. The fine-tuning screw is threaded and passes through the threaded hole of the connecting block. The front end of the fine-tuning screw has a horizontally formed mounting groove. The hook is installed in the mounting groove and then fixed by screws. The front end of the fine-tuning screw abuts against the outer wall of the shaping block, and the inner side of the front end of the hook abuts against the inner wall of the shaping block. Rotating the fine-tuning screw forward deforms the outer wall of the shaping block by pressing it forward, and rotating the fine-tuning screw backward deforms the inner wall of the shaping block by pulling it backward.

[0009] Preferably, the outer surface of the spiral disk A is provided with an A material inlet, a B material inlet, and a C material inlet, respectively. Two C material inlet channels extend to the left and right sides from the C material inlet. The top surface of the spiral disk A is recessed and provided with a primary C material flow channel and a secondary C material flow channel. The middle of the primary C material flow channel is connected to the C material inlet channel, and both ends of the primary C material flow channel are connected to the middle of the secondary C material flow channel. The two ends of the secondary C material flow channel are arranged in a spiral shape towards the inside. The eight inner ends of the secondary C material flow channel are spirally arranged at equal angles. The flow depth of the primary and secondary C material flow channels gradually decreases from the outside to the inside. The bottom surface of the spiral disk B is correspondingly provided with a primary C material flow channel and a secondary C material flow channel. After the spiral disks A and B are connected, a complete primary and secondary C material flow channel is formed. The C material flowing out from the inner end of the secondary C material flow channel enters the inner annular composite flow channel and flows vertically upwards.

[0010] Preferably, the A material inlet extends to both sides with two A material inlet channels, and the stepped center hole has two corresponding arc-shaped A material holes. The B material inlet extends to both sides with two B material inlet channels, and the stepped center hole has two corresponding arc-shaped B material holes. The distribution plate has corresponding A material passage channels and B material passage channels. The outer side of the mold core has a series of A material spiral channels, and the A material spiral channels and the inner side of the spiral body form an a material channel. The A material passage channels are connected to the bottom of the upper A material spiral channels. The outer side of the spiral body has a series of B material spiral channels, and the B material spiral channels and the inner side of the distribution body form a b material channel. The B material passage channels are connected to the bottom of the upper B material spiral channels. The B material enters the annular composite flow channel through the top of the B material spiral channels and flows vertically upward after being composited. The A material enters the annular composite flow channel through the top of the A material spiral channels and flows vertically upward after being composited.

[0011] Preferably, the outer surface of the spiral disk B is provided with D material inlets, and two D material inlets extend to the left and right sides from the inside of the D material inlets. The top surface of the spiral disk B is recessed and provided with a primary D material flow channel and a secondary D material flow channel. The middle part of the primary D material flow channel is connected to the D material inlet channel, and the two ends of the primary D material flow channel are respectively connected to the middle part of the secondary D material flow channel. The two ends of the secondary D material flow channel are spirally arranged inward. The eight inner ends of the secondary D material flow channel are spirally arranged at equal angles. The flow depth of the primary D material flow channel and the secondary D material flow channel gradually decreases from the outside to the inside. The bottom surface of the spiral disk C is provided with a primary D material flow channel and a secondary D material flow channel. After the spiral disks D and E are connected, a complete primary D material flow channel and a secondary D material flow channel are formed. The D material flowing out from the inner end of the secondary D material flow channel enters the inner annular composite flow channel and flows vertically upward.

[0012] Preferably, the outer surface of the spiral disk C is provided with E material inlets, and two E material inlets extend to the left and right sides from the inside of the E material inlets. The top surface of the spiral disk C is recessed and provided with a primary flow channel and a secondary flow channel for E material. The middle part of the primary flow channel is connected to the E material inlet channel, and the two ends of the primary flow channel are connected to the middle part of the secondary flow channel. The two ends of the secondary flow channel are spirally arranged inward. The eight inner ends of the secondary flow channel are spirally arranged at equal angles. The flow depth of the primary and secondary flow channels gradually decreases from the outside to the inside. The bottom surface of the spiral disk D is provided with a primary and secondary flow channel for E material. After the spiral disks C and D are connected, a complete primary and secondary flow channel for E material is formed. The E material flowing out from the inner end of the secondary flow channel enters the inner annular composite flow channel and flows vertically upward.

[0013] Preferably, the outer surface of the spiral disk D is provided with F material inlets, and two F material inlets extend to the left and right sides from the inside of the F material inlets. The top surface of the spiral disk D is recessed and provided with a primary F material flow channel and a secondary F material flow channel. The middle part of the primary F material flow channel is connected to the F material inlet channel, and the two ends of the primary F material flow channel are respectively connected to the middle part of the secondary F material flow channel. The two ends of the secondary F material flow channel are spirally arranged inward. The eight inner ends of the secondary F material flow channel are spirally arranged at equal angles. The flow depth of the primary F material flow channel and the secondary F material flow channel gradually decreases from the outside to the inside. The bottom surface of the spiral disk E is provided with a primary F material flow channel and a secondary F material flow channel. After the spiral disks D and E are connected, a complete primary F material flow channel and a secondary F material flow channel are formed. The F material flowing out from the inner end of the secondary F material flow channel enters the inner annular composite flow channel and flows vertically upward.

[0014] Preferably, the outer surface of the spiral disk E is provided with a G material inlet, and two G material inlet channels extend to the left and right sides from the inside of the G material inlet. The top surface of the spiral disk E is recessed and provided with a primary G material flow channel and a secondary G material flow channel. The middle part of the primary G material flow channel is connected to the G material inlet channel, and the two ends of the primary G material flow channel are respectively connected to the middle part of the secondary G material flow channel. The two ends of the secondary G material flow channel are spirally arranged inward. The eight inner ends of the secondary G material flow channel are spirally arranged at equal angles. The flow depth of the primary G material flow channel and the secondary G material flow channel gradually decreases from the outside to the inside. The bottom surface of the spiral disk F is provided with a corresponding primary G material flow channel and a secondary G material flow channel. After the spiral disk E and the spiral disk F are connected, a complete primary G material flow channel and a secondary G material flow channel are formed. The G material flowing out from the inner end of the secondary G material flow channel enters the inner annular composite flow channel and flows vertically upward.

[0015] This invention features a novel structure that can extrude multi-layered composite dense cylindrical films, effectively reducing the overall height and outer diameter of the die head. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 This is a cross-sectional view of the present invention (after being rotated 180°). Figure 6 This is a schematic diagram of the fine-tuning mechanism in this invention; Figure 7 This is a schematic diagram of the spiral disk A and the flow divider disk in this invention; Wherein: 1—Mold core body; 1a—A material spiral channel; 2—Spiral disk A; 2a—Stepped center hole; 2a1—Arc-shaped A material hole; 2a2—Arc-shaped B material hole; 2b—A material inlet; 2b1—A material inlet channel; 2c—B material inlet; 2c1—B material inlet channel; 2d—C material inlet; 2d1—C material inlet channel; 2e—C material primary flow channel; 2f—C material secondary flow channel; 3—Spiral disk B; 31—D material inlet. 32—D material inlet; 33—D material primary flow channel; 34—D material secondary flow channel; 4—spiral disc C; 41—E material inlet; 42—E material inlet; 43—E material primary flow channel; 44—E material secondary flow channel; 5—spiral disc D; 51—F material inlet; 52—F material inlet; 53—F material primary flow channel; 54—F material secondary flow channel; 6—spiral disc E; 61—G material inlet; 62—G material inlet; 63—G material primary flow channel; 64—G material secondary flow channel; 7—spiral disc F; 8—diverter disc; 81—A material passage channel; 82—B material passage channel; 9—distributor body; 10—spiral body; 10a—B material spiral channel; 11—A material channel; 12—B material channel; 13—C material channel; 14—D material channel; 15—E material channel; 16—F material channel; 17—G material channel; 18—annular composite flow channel; 19—die; 191—Die A; 192—Die B; 20—Die adjusting ring; 201—Adjusting ring A; 202—Adjusting ring B; 2021—Annular sidewall; 2022—Shaping block; 21—Die transition body; 22—Adjusting ring transition body; 23—Annular variable diameter flow channel; 24—Shaping extrusion channel; 25—Fine-tuning mechanism; 251—Connecting block; 252—Fine-tuning screw; 2521—Mounting groove; 253—Hook; 26—Support frame. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] like Figures 1 to 7As shown, this invention provides a multi-layer spiral stacked co-extrusion high-barrier blown film die head, characterized in that: it includes a die core 1, on the outer side of which are arranged spiral disks A2, B3, C4, D5, E6, and F7 stacked sequentially; a stepped center hole 2a is provided at the center of the top surface of the spiral disk A2, a flow divider 8 is provided at the step of the stepped center hole 2a, a distribution body 9 is provided on the top surface of the flow divider 8, and a spiral body 10 is provided on the top surface of the distribution body 9; the die core 1 passes through the center hole of the spiral body 10, the center hole of the distribution body 9, the center hole of the flow divider 8, and the stepped center hole 2a of the spiral disk A2 sequentially from top to bottom; a material channel 11 is provided between the spiral body 10 and the die core 1. A material channel 12 (b) is provided between the distribution body 9 and the spiral body 10; a material channel 13 (c) is provided between the spiral disc A2 and the spiral disc B3; a material channel 14 (d) is provided between the spiral disc B3 and the spiral disc C4; a material channel 15 (e) is provided between the spiral disc C4 and the spiral disc D5; a material channel 16 (f) is provided between the spiral disc D5 and the spiral disc E6; and a material channel 17 (g) is provided between the spiral disc E6 and the spiral disc F7. The above six spiral discs, together with the distribution body 9, the spiral body 10, and the die core 1, form an annular composite flow channel 18. A die 19 is connected to the top surface of the die core 1, and a die adjusting ring 20 is connected to the top surface of the spiral disc F7. An annular extrusion channel is formed between the die 19 and the die adjusting ring 20.

[0019] In the above scheme, the top surface of the die core 1 is connected to the die transition body 21, the die 19 includes die A191 and die B192, the top surface of the die transition body 21 is connected to die A191, the top surface of die A191 is connected to die B192, the top surface of the spiral disk F7 is connected to the adjusting ring transition body 22, the die adjusting ring 20 includes adjusting ring A201 and adjusting ring B202, the outer region of the top surface of the adjusting ring transition body 22 is connected to adjusting ring A201, the inner region of the top surface of the adjusting ring transition body 22 is connected to adjusting ring B202, an annular variable diameter flow channel 23 is formed between the die transition body 21 and the adjusting ring transition body 22, and an annular shaping extrusion channel 24 is formed between the die 19 and the die adjusting ring 20.

[0020] Specifically, the top of the adjusting ring A201 is connected to a series of fine-tuning mechanisms 25. All fine-tuning mechanisms 25 are evenly distributed at equal angles along the circumferential direction. The top surface of the adjusting ring B202 extends upward to form an annular sidewall 2021. The inner side of the annular sidewall 2021 and the outer side of the die 19 form a shaping extrusion channel 24. The outer side of the annular sidewall 2021 extends to form a series of shaping blocks 2022 evenly distributed along the circumferential direction. The front end of each fine-tuning mechanism 25 is connected to a shaping block 2022. The fine-tuning mechanism 25 is used to pull or push the shaping block 2022 to achieve fine-tuning of the gap in the shaping extrusion channel 24.

[0021] Specifically, the fine-tuning mechanism 25 includes a connecting block 251, a fine-tuning screw 252, and a hook 253. The connecting block 251 is connected to the adjusting ring A201 by screws. The fine-tuning screw 252 is threaded and passes through the threaded hole of the connecting block 251. The front end of the fine-tuning screw 252 has a horizontally formed mounting groove 2521. The hook 253 is installed in the mounting groove 2521 and then fixed by screws. The front end of the fine-tuning screw 252 abuts against the outer wall of the shaping block 2022, and the inner side of the front end of the hook 253 abuts against the inner wall of the shaping block 2022. Rotating the fine-tuning screw 252 in the forward direction causes the outer wall of the shaping block 2022 to deform forward. Rotating the fine-tuning screw 252 in the reverse direction causes the inner wall of the shaping block 2022 to deform backward.

[0022] Specifically, the outer surface of the spiral disk A2 is provided with an A material inlet 2b, a B material inlet 2c, and a C material inlet 2d. Two C material feeding channels 2d1 extend to the left and right sides from the C material inlet 2d. The top surface of the spiral disk A2 is recessed and provided with a primary C material flow channel 2e and a secondary C material flow channel 2f. The middle of the primary C material flow channel 2e is connected to the C material feeding channel 2d1, and both ends of the primary C material flow channel 2e are respectively connected to the middle of the secondary C material flow channel 2f. The two ends of the secondary C material flow channel 2f extend inwards. The sides are arranged in a spiral shape. The eight inner ends of the secondary flow channel 2f of the C material are spirally arranged at equal angles. The flow depth of the primary flow channel 2e and the secondary flow channel 2f of the C material gradually decreases from the outside to the inside. The bottom surface of the spiral disk B3 is correspondingly provided with the primary flow channel 2e and the secondary flow channel 2f of the C material. After the spiral disk A2 and the spiral disk B3 are connected, a complete primary flow channel 2e and secondary flow channel 2f of the C material are formed. The C material flowing out from the inner end of the secondary flow channel 2f of the C material enters the inner annular composite flow channel 18 and flows vertically upward.

[0023] Specifically, two A-material feeding channels 2b1 extend outwards from the inside of the A-material inlet 2b, and two corresponding arc-shaped A-material holes 2a1 are provided at the step of the stepped center hole 2a. Two B-material feeding channels 2c1 extend outwards from the inside of the B-material inlet 2c, and two corresponding arc-shaped B-material holes 2a2 are provided at the step of the stepped center hole 2a. A-material passage channels 81 and B-material passage channels 82 are correspondingly provided on the distribution plate 8. A series of A-material spiral channels 1a are provided on the outer surface of the mold core 1. The A-material spiral channels 1a and... A material channel 11 is formed between the inner surfaces of the spiral body 10. The material A passage 81 is connected to the bottom of the upper material A spiral channel 1a. A series of material B spiral channels 10a are provided on the outer surface of the spiral body 10. The material B spiral channel 10a and the inner surface of the distribution body 9 form a material B channel 12. The material B passage 82 is connected to the bottom of the upper material B spiral channel 10a. Material B enters the annular composite flow channel 18 through the top of the material B spiral channel 10a and flows vertically upward after being combined. Material A enters the annular composite flow channel 18 through the top of the material A spiral channel 1a and flows vertically upward after being combined.

[0024] Specifically, the outer surface of the spiral disk B3 is provided with D material inlets 31, and two D material inlets 32 extend to the left and right sides from the inside of the D material inlets 31. The top surface of the spiral disk B3 is recessed and provided with a primary D material flow channel 33 and a secondary D material flow channel 34. The middle of the primary D material flow channel 33 is connected to the D material inlet channel 32, and the two ends of the primary D material flow channel 33 are respectively connected to the middle of the secondary D material flow channel 34. The two ends of the secondary D material flow channel 34 are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel 34 of material D are spirally arranged at equal angles. The flow depth of the primary flow channel 33 and the secondary flow channel 34 of material D gradually decreases from the outside to the inside. The bottom surface of the spiral disk C4 is provided with the primary flow channel 33 and the secondary flow channel 34 of material D. After the spiral disk B3 and the spiral disk C4 are connected, a complete primary flow channel 33 and secondary flow channel 34 of material D are formed. The material D flowing out from the inner end of the secondary flow channel 34 of material D enters the inner annular composite flow channel 18 and flows vertically upward.

[0025] Specifically, the outer surface of the spiral disk C4 is provided with E-material inlets 41, and two E-material feeding channels 42 extend to the left and right sides from the inside of the E-material inlets 41. The top surface of the spiral disk C4 is recessed and provided with a primary E-material flow channel 43 and a secondary E-material flow channel 44. The middle of the primary E-material flow channel 43 is connected to the E-material feeding channel 42, and the two ends of the primary E-material flow channel 43 are respectively connected to the middle of the secondary E-material flow channel 44. The two ends of the secondary E-material flow channel 44 are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel 44 of the E material are spirally arranged at equal angles. The flow depth of the primary flow channel 43 and the secondary flow channel 44 of the E material gradually decreases from the outside to the inside. The bottom surface of the spiral disk D5 is correspondingly provided with the primary flow channel 43 and the secondary flow channel 44 of the E material. After the spiral disk C4 and the spiral disk D5 are connected, a complete primary flow channel 43 and secondary flow channel 44 of the E material are formed. The E material flowing out from the inner end of the secondary flow channel 44 enters the inner annular composite flow channel 18 and then flows vertically upward.

[0026] Specifically, the outer surface of the spiral disk D5 is provided with F material inlets 51, and two F material inlets 52 extend to the left and right sides from the inside of the F material inlets 51. The top surface of the spiral disk D5 is recessed and provided with a primary F material flow channel 53 and a secondary F material flow channel 54. The middle of the primary F material flow channel 53 is connected to the F material inlet channel 52, and the two ends of the primary F material flow channel 53 are respectively connected to the middle of the secondary F material flow channel 54. The two ends of the secondary F material flow channel 54 are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel 54 of the F material are arranged in a spiral at equal angles. The flow depth of the primary flow channel 53 and the secondary flow channel 54 of the F material gradually decreases from the outside to the inside. The bottom surface of the spiral disk E6 is provided with the primary flow channel 53 and the secondary flow channel 54 of the F material. After the spiral disk D5 and the spiral disk E6 are connected, a complete primary flow channel 53 and secondary flow channel 54 of the F material are formed. The F material flowing out from the inner end of the secondary flow channel 54 enters the inner annular composite flow channel 18 and flows vertically upward.

[0027] Specifically, the outer surface of the spiral disk E6 is provided with G-material inlets 61, and two G-material inlet channels 62 extend outwards from the inside of the G-material inlets 61. The top surface of the spiral disk E6 is recessed and provided with a primary G-material flow channel 63 and a secondary G-material flow channel 64. The middle of the primary G-material flow channel 63 is connected to the G-material inlet channel 62, and both ends of the primary G-material flow channel 63 are respectively connected to the middle of the secondary G-material flow channel 64. The two ends of the secondary G-material flow channel 64 are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel 64 of the G material are spirally arranged at equal angles. The depth of the primary flow channel 63 and the secondary flow channel 64 of the G material gradually decreases from the outside to the inside. The bottom surface of the spiral disk F7 is correspondingly provided with the primary flow channel 63 and the secondary flow channel 64 of the G material. After the spiral disk E6 and the spiral disk F7 are connected, a complete primary flow channel 63 and secondary flow channel 64 of the G material are formed. The G material flowing out from the inner end of the secondary flow channel 64 enters the inner annular composite flow channel 18 and flows vertically upward.

[0028] In this invention, Figures 1 to 4 The image shown is of the invention in its uninstalled state. For ease of understanding, the flow direction of various raw materials is uniformly described as upward flow in the above description, consistent with the attached... Figures 1 to 4 To put it in perspective.

[0029] The working principle of this invention is as follows: After the entire mold head is assembled, it needs to be rotated 180°, as follows: Figure 5 As shown, the original spiral disc A2 bottom surface is hoisted up and rotated 180° to be connected and fixed to the equipment after being connected to the support frame 26. In the following description, the positional relationship between the upper and lower parts is exactly the opposite.

[0030] The following is based on Figure 5 Based on this, the working principle of each part will be described in detail: Spiral disks B3, C4, D5, and E6 all have rounded corners at the inner ends of their top surfaces that extend downwards. When raw materials d, e, f, and g flow inwards to the innermost side, they are guided downwards and superimposed on the raw materials in the annular composite channel 18.

[0031] Raw material a enters from the A material inlet 2b of the spiral disc A2, passes through the two A material inlet channels 2b1 on the left and right, reaches the arc-shaped A material hole 2a1, enters the A material passage channel 81 in the distribution disc 8, and enters the A material spiral channel 1a downwards evenly. It is then extruded from the a material channel 11, enters the inner surface of the annular composite flow channel 18 for composite, and flows downwards.

[0032] Raw material b enters from the B material inlet 2c of the spiral disc A2, passes through the two B material inlet channels 2c1 on the left and right, reaches the arc-shaped B material hole 2a2, enters the B material passage channel 82 in the distribution disc 8, and enters the B material spiral channel 10a downwards evenly. It is then extruded from the b material channel 12, enters the inner surface of the annular composite flow channel 18 for composite, and flows downwards.

[0033] Raw material c enters from the C material inlet 2d of the spiral disc A2, passes through the left and right C material inlet channels 2d1 to reach the middle of the C material primary flow channel 2e, then splits into two and flows to both sides into the C material secondary flow channel 2f, then splits into two again and enters the spiral flow channel at the inner end, and finally flows downward evenly into the annular composite flow channel 18.

[0034] Raw material d enters from the D material inlet 31 of the spiral disc B3, passes through the left and right D material inlet channels 32 to reach the middle of the D material primary flow channel 33, then splits into two and flows to both sides into the D material secondary flow channel 34, then splits into two and enters the spiral flow channel at the inner end, and finally enters the outer surface of the annular composite flow channel 18 for composite and flows downward.

[0035] Raw material e enters from the E material inlet 41 of the spiral disc C4, passes through the left and right E material inlet channels 42 to reach the middle of the E material primary flow channel 43, then splits into two and flows to both sides into the E material secondary flow channel 44, then splits into two and enters the spiral flow channel at the inner end, and finally enters the outer surface of the annular composite flow channel 18 for composite and flows downward.

[0036] Raw material f enters from the F material inlet 51 of the spiral disc D5, passes through the left and right F material inlet channels 52 to reach the middle of the primary F material flow channel 53, then splits into two and flows to both sides into the secondary F material flow channel 54, then splits into two and enters the spiral flow channel at the inner end, and finally enters the outer surface of the annular composite flow channel 18 for composite and flows downward.

[0037] Raw material g enters from the G material inlet 61 of the spiral disc E6, passes through the two left and right G material inlet channels 62 to reach the middle of the G material primary flow channel 63, then splits into two and flows to both sides into the G material secondary flow channel 64, then splits into two and enters the spiral flow channel at the inner end, and finally enters the outer surface of the annular composite flow channel 18 for composite and flows downward.

[0038] The composite abcdefg material flows upward into the annular variable diameter channel 23, changing its diameter and adjusting the gaps within the channel to alter the fluid pressure. It then continues to flow downward into the shaping extrusion channel, ultimately being extruded into a cylindrical film product.

[0039] The abcdefg material can be 7 different raw materials or several identical raw materials, depending on the specific needs.

[0040] In addition to the aforementioned 7-layer material stacking structure, this invention is also applicable to other odd-numbered material stacking structures, such as 9-layer or 11-layer materials. It can be achieved simply by increasing the number of spiral discs and adjusting the length of the mold core 1 accordingly. These simple changes still fall within the scope of the technical solution of this invention.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. The terms "up" and "down" regarding orientation, as well as the states before and after the flip in the accompanying drawings, have been specifically described in the text, and their meanings are clear. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-layer spiral superimposed co-extrusion high-barrier blown film die, characterized in that: The mold core (1) includes a core body (1), on the outside of which are arranged spiral disks A (2), B (3), C (4), D (5), E (6), and F (7) stacked sequentially. A stepped center hole (2a) is provided at the center of the top surface of spiral disk A (2), and a flow divider (8) is provided at the step of the stepped center hole (2a). A distribution body (9) is provided on the top surface of the flow divider (8), and a spiral body (10) is provided on the top surface of the distribution body (9). The core body (1) passes through the center hole of the spiral body (10), the center hole of the distribution body (9), the center hole of the flow divider (8), and the stepped center hole (2a) of the spiral disk A (2) sequentially from top to bottom. A material channel (11) is provided between the spiral body (10) and the core body (1), and a material channel (11) is provided between the distribution body (9) and the spiral body (10). A material channel (12) is provided. A material channel (13) is provided between the spiral disk A (2) and the spiral disk B (3). A material channel (14) is provided between the spiral disk B (3) and the spiral disk C (4). A material channel (15) is provided between the spiral disk C (4) and the spiral disk D (5). A material channel (16) is provided between the spiral disk D (5) and the spiral disk E (6). A material channel (17) is provided between the spiral disk E (6) and the spiral disk F (7). The above six spiral disks form an annular composite flow channel (18) with the distribution body (9), the spiral body (10), and the core body (1). The top surface of the core body (1) is connected to the die (19). The top surface of the spiral disk F (7) is connected to the die adjustment ring (20). An annular extrusion channel is formed between the die (19) and the die adjustment ring (20).

2. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 1, characterized in that: The top surface of the die core (1) is connected to the die transition body (21). The die (19) includes die A (191) and die B (192). The top surface of the die transition body (21) is connected to die A (191). The top surface of die A (191) is connected to die B (192). The top surface of the spiral disk F (7) is connected to the adjusting ring transition body (22). The die adjusting ring (20) includes adjusting ring A (201) and adjusting ring B (202). The outer region of the top surface of the adjusting ring transition body (22) is connected to adjusting ring A (201). The inner region of the top surface of the adjusting ring transition body (22) is connected to adjusting ring B (202). An annular variable diameter flow channel (23) is formed between the die transition body (21) and the adjusting ring transition body (22). An annular shaping extrusion channel (24) is formed between the die (19) and the die adjusting ring (20).

3. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 2, characterized in that: The top of the adjustment ring A (201) is connected to a series of fine-tuning mechanisms (25). All fine-tuning mechanisms (25) are evenly distributed at equal angles along the circumferential direction. The top surface of the adjustment ring B (202) extends upward to form an annular sidewall (2021). The inner side of the annular sidewall (2021) and the outer side of the die (19) form an annular shaping extrusion channel (24). The outer side of the annular sidewall (2021) extends to form a series of shaping blocks (2022) evenly distributed along the circumferential direction. The front end of each fine-tuning mechanism (25) is connected to a shaping block (2022). The fine-tuning mechanism (25) is used to pull or push the shaping block (2022) to achieve fine-tuning of the gap in the shaping extrusion channel (24).

4. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 3, characterized in that: The fine-tuning mechanism (25) includes a connecting block (251), a fine-tuning screw (252), and a hook (253). The connecting block (251) is connected to the adjusting ring A (201) by screws. The fine-tuning screw (252) is threaded and passes through the threaded hole of the connecting block (251). The front end of the fine-tuning screw (252) has a horizontally formed mounting groove (2521). The hook (253) is installed in the mounting groove (2521) and then screwed in. The connection is fixed, with the front end of the fine-tuning screw (252) abutting against the outer wall of the shaping block (2022), and the inner side of the front end of the hook (253) abutting against the inner wall of the shaping block (2022). Rotating the fine-tuning screw (252) in the forward direction causes the outer wall of the shaping block (2022) to deform forward, while rotating the fine-tuning screw (252) in the reverse direction causes the inner wall of the shaping block (2022) to deform backward.

5. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 1, characterized in that: The outer surface of the spiral disk A (2) is provided with an A material inlet (2b), a B material inlet (2c), and a C material inlet (2d). Two C material inlet channels (2d1) extend outwards from the C material inlet (2d) to the left and right. The top surface of the spiral disk A (2) is recessed and provided with a primary C material flow channel (2e) and a secondary C material flow channel (2f). The middle of the primary C material flow channel (2e) is connected to the C material inlet channel (2d1), and both ends of the primary C material flow channel (2e) are connected to the middle of the secondary C material flow channel (2f). The two ends of the secondary C material flow channel (2f) extend inwards. The sides are arranged in a spiral shape. The eight inner ends of the secondary flow channel (2f) of the C material are spirally arranged at equal angles. The flow channel depth of the primary flow channel (2e) and the secondary flow channel (2f) of the C material gradually decreases from the outside to the inside. The bottom surface of the spiral disk B (3) is provided with the primary flow channel (2e) and the secondary flow channel (2f) of the C material. After the spiral disk A (2) and the spiral disk B (3) are connected, a complete primary flow channel (2e) and secondary flow channel (2f) of the C material are formed. The C material flowing out from the inner end of the secondary flow channel (2f) of the C material enters the inner annular composite flow channel (18) and flows vertically upward.

6. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 5, characterized in that: The A material inlet (2b) extends to both sides with two A material inlet channels (2b1). Two corresponding arc-shaped A material holes (2a1) are provided at the step of the stepped center hole (2a). The B material inlet (2c) extends to both sides with two B material inlet channels (2c1). Two corresponding arc-shaped B material holes (2a2) are provided at the step of the stepped center hole (2a). The distribution plate (8) is provided with corresponding A material passage channels (81) and B material passage channels (82). The outer surface of the mold core (1) is provided with a series of A material spiral channels (1a). The A material spiral channels (1a) and the spiral body... (10) An a material channel (11) is formed between the inner sides. The A material passage channel (81) is connected to the bottom of the upper A material spiral channel (1a). A series of B material spiral channels (10a) are provided on the outer side of the spiral body (10). A b material channel (12) is formed between the B material spiral channel (10a) and the inner side of the distribution body (9). The B material passage channel (82) is connected to the bottom of the upper B material spiral channel (10a). The B material enters the annular composite flow channel (18) through the top of the B material spiral channel (10a) and flows vertically upward after being combined. The A material enters the annular composite flow channel (18) through the top of the A material spiral channel (1a) and flows vertically upward after being combined.

7. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 5, characterized in that: The spiral disk B (3) is provided with D material inlets (31) on its outer side. Two D material inlets (32) extend outwards from the inside of the D material inlets (31) to the left and right. The top surface of the spiral disk B (3) is recessed and provided with a primary D material flow channel (33) and a secondary D material flow channel (34). The middle of the primary D material flow channel (33) is connected to the D material inlet channel (32). Both ends of the primary D material flow channel (33) are connected to the middle of the secondary D material flow channel (34). Both ends of the secondary D material flow channel (34) are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel (34) are spirally arranged at equal angles. The depth of the primary flow channel (33) and the secondary flow channel (34) of the material gradually decreases from the outside to the inside. The bottom surface of the spiral disk C (4) is provided with the primary flow channel (33) and the secondary flow channel (34) of the material. After the spiral disk B (3) and the spiral disk C (4) are connected, a complete primary flow channel (33) and secondary flow channel (34) of the material are formed. The material flowing out of the inner end of the secondary flow channel (34) of the material enters the inner annular composite flow channel (18) and flows vertically upward.

8. The multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 7, characterized in that: The spiral disk C (4) has an E material inlet (41) on its outer side. Two E material inlet channels (42) extend outwards from the inside of the E material inlet (41). The top surface of the spiral disk C (4) has a recessed E material primary flow channel (43) and an E material secondary flow channel (44). The middle of the primary flow channel (43) is connected to the E material inlet channel (42). Both ends of the primary flow channel (43) are connected to the middle of the secondary flow channel (44). The two ends of the secondary flow channel (44) are arranged in a spiral shape towards the inside. The eight inner ends of the material secondary flow channel (44) are spirally arranged at equal angles. The depth of the material primary flow channel (43) and material secondary flow channel (44) gradually decreases from the outside to the inside. The bottom surface of the spiral disk D (5) is provided with material primary flow channel (43) and material secondary flow channel (44). After the spiral disk C (4) and spiral disk D (5) are connected, a complete material primary flow channel (43) and material secondary flow channel (44) are formed. The material E flowing out from the inner end of the material secondary flow channel (44) enters the inner annular composite flow channel (18) and flows vertically upward.

9. A multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 8, characterized in that: The outer surface of the spiral disk D (5) is provided with F material inlets (51). Two F material inlets (52) extend outwards from the inside of the F material inlets (51) to the left and right. The top surface of the spiral disk D (5) is recessed and provided with a primary F material flow channel (53) and a secondary F material flow channel (54). The middle of the primary F material flow channel (53) is connected to the F material inlet channel (52). Both ends of the primary F material flow channel (53) are connected to the middle of the secondary F material flow channel (54). Both ends of the secondary F material flow channel (54) are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel (54) are spirally arranged at equal angles. The depth of the primary flow channel (53) and the secondary flow channel (54) of the material gradually decreases from the outside to the inside. The bottom surface of the spiral disk E (6) is provided with the primary flow channel (53) and the secondary flow channel (54) of the material. After the spiral disk D (5) and the spiral disk E (6) are connected, a complete primary flow channel (53) and secondary flow channel (54) of the material are formed. The material flowing out of the inner end of the secondary flow channel (54) of the material enters the inner annular composite flow channel (18) and flows vertically upward.

10. A multi-layer spiral superimposed co-extrusion high-barrier blown film die head according to claim 9, characterized in that: The spiral disk E (6) has a G material inlet (61) on its outer side. Two G material inlet channels (62) extend outwards from the inside of the G material inlet (61). The top surface of the spiral disk E (6) has a recessed G material primary flow channel (63) and a G material secondary flow channel (64). The middle of the G material primary flow channel (63) is connected to the G material inlet channel (62). Both ends of the G material primary flow channel (63) are connected to the middle of the G material secondary flow channel (64). Both ends of the G material secondary flow channel (64) are arranged in a spiral shape towards the inside. The eight inner ends of the secondary flow channel (64) are spirally arranged at equal angles. The depth of the primary flow channel (63) and the secondary flow channel (64) of the material gradually decreases from the outside to the inside. The bottom surface of the spiral disk F (7) is provided with the primary flow channel (63) and the secondary flow channel (64) of the material. After the spiral disk E (6) and the spiral disk F (7) are connected, a complete primary flow channel (63) and secondary flow channel (64) of the material are formed. The material flowing out of the inner end of the secondary flow channel (64) of the material enters the inner annular composite flow channel (18) and flows vertically upward.

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