Double-layer switchable color strip extrusion flat die head

Abstract

The invention provides a double-layer switchable color strip extrusion flat die head which comprises an upper die body, a middle die body and a lower die body, an A material feeding channel is formed in the upper die body, a B material feeding channel is formed in the middle die body, a C material feeding channel is formed in the lower die body, and a cylindrical mounting cavity is formed between the upper die body and the middle die body in the breadth direction. A cylindrical core rod is arranged in the cylindrical mounting cavity, an A material branch runner communicated with the A material feeding channel is formed in the upper surface of the core rod, a B material branch runner communicated with the B material feeding channel is formed in the lower surface of the core rod, and the A material branch runner and the B material branch runner are adjacently arranged in the breadth direction; a color strip converging runner is arranged between the upper die body and the middle die body on the front side of the core rod, a base material runner is arranged between the middle die body and the front area of the lower die body, the base material runner is communicated with the C material feeding channel, and a composite extrusion channel is arranged between the upper die body and the lower die body. The structure and the width of the color strip can be changed by replacing the core rod on line.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion die heads, in particular to a double-layer switchable color stripe extrusion flat die head. Background Art

[0002] At present, the color strip flow channel of the existing color strip die is set in the die body, and the color strip flow channel can only be compounded in the die body, and can only produce fixed-structure color strip products. This is achieved by horizontal extrusion and mixing of two materials. If you want to change the color strip structure, you can only do so by replacing the die head. Such operation is complicated and costly, and obviously cannot meet the application needs of many occasions. Summary of the Invention

[0003] In view of the above problems, the present invention only provides a double-layer switchable color strip extrusion flat die head, which has a novel structure and can change the structure and width of the color strip by replacing the core rod online.

[0004] The technical solution of the present invention is a double-layer switchable color strip extrusion flat die head, which is characterized in that: it includes an upper die body, an intermediate die body and a lower die body, the upper die body is provided with an A material feeding channel, the intermediate die body is provided with a B material feeding channel, the lower die body is provided with a C material feeding channel, a cylindrical mounting cavity is provided between the upper die body and the intermediate die body along the width direction, a cylindrical core rod is provided in the cylindrical mounting cavity, the core rod can be quickly replaced without opening the die body, and the upper surface of the core rod is provided with an A material support connected to the A material feeding channel. A flow channel, a branch flow channel for material B connected to the feed channel for material B is provided on the lower surface of the core rod, the branch flow channel for material A and the branch flow channel for material B are arranged adjacent to each other along the width direction, a color strip merging flow channel is provided between the upper mold body and the middle mold body on the front side of the core rod, a substrate flow channel is provided between the middle mold body and the front area of ​​the lower mold body, the substrate flow channel is connected to the feed channel for material C, a composite extrusion channel is provided between the upper mold body and the lower mold body, the upper rear end of the composite extrusion channel is connected to the color strip merging flow channel, and the lower rear end of the composite extrusion channel is connected to the substrate flow channel.

[0005] Preferably, the upper surface of the middle area of ​​the core rod is processed with a branch channel for material A, and the lower surfaces of the left area and the right area of ​​the core rod are respectively processed with branch channels for material B, and adjacent areas of the branch channel for material B, the branch channel for material A, and the branch channel for material B are formed along the width direction in front of the core rod, and adjacent color strip flow channels of material B, material A, and material B are formed along the width direction in the color strip converging channel.

[0006] Preferably, a branch channel for material A is processed on the upper surface of the left area of ​​the core rod, and a branch channel for material B is processed on the lower surface of the right area of ​​the core rod. Adjacent areas of the branch channel for material A and the branch channel for material B are formed along the width direction in front of the core rod, and adjacent color strip channels for material A and material B are formed along the width direction in the color strip converging channel.

[0007] Preferably, the cylindrical mounting cavity is arranged in the middle area of ​​the upper mold body and the middle mold body, and the cylindrical mounting cavity includes a notch with a semicircular cross-section located on the top surface of the middle mold body and a notch with a semicircular cross-section located on the bottom surface of the upper mold body. The two semicircular cross-section notches are combined to form a complete circular cross-section.

[0008] Preferably, a transition zone with an arc-shaped contraction is provided at the front end of the C material feeding channel, and the cross-sectional size of the transition zone continuously decreases from the back to the front until it becomes the same as the size of the substrate flow channel.

[0009] Preferably, the C material feeding channel includes a semicircular notch located on the top surface of the lower mold body and a semicircular notch located on the bottom surface of the middle mold body. After the lower mold body and the middle mold body are connected, the semicircular notches of the two are combined to form a C material feeding channel with a circular cross-section.

[0010] Preferably, the front end of the upper mold body is provided with a mold lip and a fine-tuning deformation groove.

[0011] Preferably, a flow stabilization groove is provided in the composite extrusion channel, the depth of the flow stabilization groove increases from the back to the front to the maximum depth and then gradually decreases smoothly, and the flow stabilization groove is located in the rear area of ​​the die lip of the upper die body.

[0012] Preferably, the upper mold body, the middle mold body and the lower mold body are connected into one body by locking screws.

[0013] The present invention sets different branch channel structures on different core rods, and the color strip structure and width can be changed by replacing the core rods online, without having to replace the entire die head structure as in the past. The operation is simple and can meet the needs of different applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the internal cross-sectional structure of the present invention; Figure 2 An exploded view of the present invention; Figure 3 for Figure 2 Structural diagram from another perspective; Figure 4 A schematic structural diagram of a core rod in the present invention; Figure 5 for Figure 4 Structural diagram from another perspective; Figure 6 The present invention adopts Figure 4 Color strip composite products produced from the core rod in the production process; Figure 7 This is a schematic diagram of the second structure of the core rod in the present invention; Figure 8 for Figure 7 Structural diagram from another perspective; Figure 9 The present invention adopts Figure 7 Color strip composite products produced from the core rod in the production process; Among them: 1—upper mold body; 11—A material feed channel; 12—die lip; 13—fine-tuning deformation groove; 2—middle mold body; 21—B material feed channel; 3—lower mold body; 31—C material feed channel; 311—transition zone; 4—cylindrical mounting cavity; 5—core rod; 51—A material branch channel; 52—B material branch channel; 6—color strip converging channel; 7—substrate flow channel; 8—composite extrusion channel; 81—stable flow groove; 9—locking screw. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below with reference to the accompanying drawings.

[0016] like Figures 1 to 3 As shown, the present invention provides a double-layer switchable color strip extrusion flat die head, including an upper die body 1, an intermediate die body 2 and a lower die body 3, wherein the upper die body 1 is provided with an A material feed channel 11, the intermediate die body 2 is provided with a B material feed channel 21, and the lower die body 3 is provided with a C material feed channel 31. A cylindrical mounting cavity 4 is provided between the upper die body 1 and the intermediate die body 2 along the width direction, and a cylindrical core rod 5 is provided in the cylindrical mounting cavity 4. The core rod 5 can be quickly replaced without opening the die body, and an A material branch channel 51 connected to the A material feed channel 11 is provided on the upper surface of the core rod 5. A B material branch channel 52 connected to the B material feed channel 21 is provided on the lower surface of the core rod 5. The A material branch channel 51 and the B material branch channel 52 are arranged adjacent to each other along the width direction. A color strip merging channel 6 is provided between the upper mold body 1 and the middle mold body 2 located on the front side of the core rod 5. A substrate flow channel 7 is provided between the front area of ​​the middle mold body 2 and the lower mold body 3. The substrate flow channel 7 is connected to the C material feed channel 31. A composite extrusion channel 8 is provided between the upper mold body 1 and the lower mold body 3. The upper rear end of the composite extrusion channel 8 is connected to the color strip merging channel 6, and the lower rear end of the composite extrusion channel 8 is connected to the substrate flow channel 7.

[0017] In the above scheme, if Figures 4 to 6As shown, as a specific core rod structure, the upper surface of the middle region of the core rod 5 is processed with the A material branch runner 51, the lower surface of the left side region and the lower surface of the right side region of the core rod 5 are respectively processed with the B material branch runner 52, and the front of the core rod 5 is formed with the adjacent regions of the B material branch runner 52, the A material branch runner 51 and the B material branch runner 52 in the width direction, and the color bar merging runner 6 is formed with the adjacent color bar runners of the B material, the A material and the B material in the width direction.

[0018] In addition, as shown, Figures 7 to 9 As another specific core rod structure, the upper surface of the left side region of the core rod 5 is processed with the A material branch runner 51, the lower surface of the right side region of the core rod 5 is processed with the B material branch runner 52, and the front of the core rod 5 is formed with the adjacent regions of the A material branch runner 51 and the B material branch runner 52 in the width direction, and the color bar merging runner 6 is formed with the adjacent color bar runners of the A material and the B material in the width direction.

[0019] Specifically, the cylindrical mounting cavity 4 is arranged in the middle region of the upper die body 1 and the middle die body 2, and the cylindrical mounting cavity 4 includes a semicircular notch on the top surface of the middle die body 2 and a semicircular notch on the bottom surface of the upper die body 1, and the two semicircular notches combine to form a complete circular cross section.

[0020] Specifically, the front end of the C material feeding channel 31 is provided with a transition zone 311 in the form of an arc-shaped necking, and the cross-sectional size of the transition zone 311 gradually decreases from the rear to the front until it is the same as the size of the base material runner 7.

[0021] Specifically, the C material feeding channel 31 includes a semicircular notch on the top surface of the lower die body 3 and a semicircular notch on the bottom surface of the middle die body 2, and the semicircular notches of the lower die body 3 and the middle die body 2 combine to form a circular cross-section C material feeding channel 31 after the two are connected.

[0022] Specifically, the front end of the upper die body 1 is provided with a die lip 12 and a fine adjustment deformation groove 13, and a fine adjustment mechanism is arranged at the fine adjustment deformation groove 13 to adjust the size of the die lip gap.

[0023] Specifically, the composite extrusion channel 8 is provided with a flow stabilizing groove 81, the depth of the flow stabilizing groove 81 gradually increases from the rear to the front to the maximum depth and then gradually decreases smoothly, and the flow stabilizing groove 81 is located in the rear region of the die lip 12 of the upper die body 1.

[0024] Specifically, the upper die body 1, the middle die body 2 and the lower die body 3 are connected into one body by the locking screw 9.

[0025] The present application adopts A material branch runner 51 communicated with A material feeding channel 11 on the upper surface of the core rod 5, and B material branch runner 52 communicated with B material feeding channel 21 on the lower surface of the core rod 5, wherein the A material branch runner 51 and the B material branch runner 52 can be combined and arranged according to the actual situation, such as BAB, AB, ABA, BA...AB, by setting different widths of the A and B branch runners on different core rods 5, the width direction of the color bar can be changed, and the structure of other parts of the whole mold can remain unchanged, so that different structure color bar composite products can be produced, and different color bar proportions need to be replaced during online production extrusion, only the corresponding core rod 5 needs to be selected for insertion and replacement, the operation is simple, safe and reliable, and the color bar structure can be quickly switched by replacing different core rods 5, and the core rod 5 does not need to be opened during the replacement process. Compared with the replacement of the whole mold in the past, the production cost is greatly reduced, and the structure and width of the color bar can be changed by replacing the core rod 5 online, and the replacement efficiency is high.

[0026] The above is only a preferred embodiment of the present application, and does not limit the application in any form. Any simple modification, equivalent change or modification made according to the technical principles of the present application to the above embodiments still belongs to the scope of the technical solutions of the present application.

Claims

1. A double-layer switchable color strip extrusion flat die head, characterized by: The invention comprises an upper mold body (1), an intermediate mold body (2) and a lower mold body (3), wherein the upper mold body (1) is provided with an A material feeding channel (11), the intermediate mold body (2) is provided with a B material feeding channel (21), and the lower mold body (3) is provided with a C material feeding channel (31), a cylindrical mounting cavity (4) is provided between the upper mold body (1) and the intermediate mold body (2) along the width direction, a cylindrical core rod (5) is provided in the cylindrical mounting cavity (4), an A material branch channel (51) connected to the A material feeding channel (11) is provided on the upper surface of the core rod (5), and a B material branch channel (51) connected to the B material feeding channel (21) is provided on the lower surface of the core rod (5). The B material branch channel (52), the A material branch channel (51) and the B material branch channel (52) are arranged adjacent to each other along the width direction, a color strip merging channel (6) is provided between the upper mold body (1) and the middle mold body (2) on the front side of the core rod (5), a substrate flow channel (7) is provided between the middle mold body (2) and the front area of ​​the lower mold body (3), the substrate flow channel (7) is connected to the C material feed channel (31), a composite extrusion channel (8) is provided between the upper mold body (1) and the lower mold body (3), the upper rear end of the composite extrusion channel (8) is connected to the color strip merging channel (6), and the lower rear end of the composite extrusion channel (8) is connected to the substrate flow channel (7).

2. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The upper surface of the middle area of ​​the core rod (5) is processed with an A material branch channel (51), and the lower surfaces of the left area and the right area of ​​the core rod (5) are respectively processed with a B material branch channel (52). The front of the core rod (5) forms three adjacent areas of the B material branch channel (52), the A material branch channel (51), and the B material branch channel (52) along the width direction. The color strip converging channel (6) forms three adjacent color strip channels of the B material, the A material, and the B material along the width direction.

3. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The upper surface of the left region of the core rod (5) is processed with a branch flow channel (51) for material A, and the lower surface of the right region of the core rod (5) is processed with a branch flow channel (52) for material B. Adjacent regions of the branch flow channel (51) for material A and the branch flow channel (52) for material B are formed in the width direction in front of the core rod (5), and adjacent color strip flow channels for material A and material B are formed in the width direction in the color strip converging flow channel (6).

4. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The cylindrical mounting cavity (4) is arranged in the middle area of ​​the upper mold body (1) and the middle mold body (2), and the cylindrical mounting cavity (4) includes a notch with a semicircular cross-section located on the top surface of the middle mold body (2) and a notch with a semicircular cross-section located on the bottom surface of the upper mold body (1), and the two notches with semicircular cross-sections are combined to form a complete circular cross-section.

5. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The front end of the C material feeding channel (31) is provided with a transition zone (311) with an arc-shaped contraction, and the cross-sectional size of the transition zone (311) continuously decreases from the back to the front until it becomes the same size as the substrate flow channel (7).

6. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The C material feeding channel (31) comprises a semicircular notch located on the top surface of the lower mold body (3) and a semicircular notch located on the bottom surface of the middle mold body (2); after the lower mold body (3) and the middle mold body (2) are connected, the semicircular notches of the two are combined to form a C material feeding channel (31) with a circular cross-section.

7. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The front end of the upper mold body (1) is provided with a mold lip (12) and a fine-tuning deformation groove (13).

8. The double-layer switchable color strip extrusion flat die head according to claim 7, characterized in that: A flow stabilizing groove (81) is provided in the composite extrusion channel (8), the depth of the flow stabilizing groove (81) increases from the back to the front to the maximum depth and then gradually decreases smoothly. The flow stabilizing groove (81) is located in the rear area of ​​the die lip (12) of the upper die body (1).

9. The double-layer switchable color strip extrusion flat die head according to claim 1, characterized in that: The upper mold body (1), the middle mold body (2) and the lower mold body (3) are connected into one body via a locking screw (9).

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