Extrusion die of multi-channel pipe and multi-channel pipe prepared by extrusion die

Abstract

The utility model relates to an extrusion die of a multi-channel pipe and the multi-channel pipe prepared by the extrusion die. The extrusion die comprises a die orifice (5) and a die core (6), the die orifice (5) comprises a front die orifice (51) and a rear die orifice (52); the mold core (6) is installed in the front mold opening (51) and the rear mold opening (52) and is divided into a mold core front section (61) and a mold core middle section (62), a plurality of second material channels (9) are formed in the mold core middle section (62), the rear portion of the mold core middle section (62) is communicated with a feeding port (522) of the rear mold opening (52), one end of each second material channel (9) is communicated with the outside of the mold core, and the other end of each second material channel (9) is communicated with the circular groove functional area (10). According to the extrusion die disclosed by the utility model, auxiliary materials can be added into the extruded material through the second material channel, and the auxiliary materials are not limited to liquid, powder, particles and the like, so that an extruded product has irregular color distribution, and the appearance of the product is enriched.

Description

[Technical field]

[0001] The utility model relates to an extrusion die, in particular to an extrusion die for producing a multi-channel pipe, and also relates to the multi-channel pipe produced by the die. [Background technology]

[0002] The new type of heat-not-burn cigarette filter rod usually has the functions of supporting, cooling and acting as a filter. Multi-channel tubes can be used as new type of heat-not-burn cigarette filter rods. For example, Chinese patent application CN 215750663A discloses a M-shaped special-shaped tube extrusion die head that can manufacture special-shaped tubes with M-shaped support rib structures; Chinese utility model patent CN 98216755.5 also discloses a porous tube extrusion molding die, which has an extrusion die head, a compression channel, a diversion channel and a cooling part, and realizes the cooling and shaping of the porous tube. However, the molds of the above patents have the characteristics of single style, complex structure, high processing difficulty, low product quality and pass rate, etc. [Contents of the utility model]

[0003] The utility model aims to improve the production efficiency of multi-channel tubes and provide an extrusion die with a simpler structure, more diverse core shapes and the ability to prepare multi-channel tubes with various cross-sectional shapes.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an extrusion die for a multi-channel tube, the extrusion die comprises a die opening 5 and a die core 6, the die opening 5 comprises a front die opening 51 and a rear die opening 52 fixed together by mechanical connection, the middle part of the front die opening 51 is axially penetrated as a die core groove 511, the middle part of the rear die opening 52 is axially penetrated, the front section is a three-stage circular groove 521, the rear section is a feed port 522, and the inner diameter of the die core groove 511 is smaller than the inner diameter of the three-stage circular groove 521;

[0005] The mold core 6 is divided into a mold core front section 61 and a mold core middle section 62. The mold core front section 61 matches the mold core groove 511, and the mold core middle section 62 matches the three-stage circular groove 521. The mold core front section 61 is composed of a plurality of molding areas 12 constructed along the length direction. The channel between two adjacent molding areas 12 is a rib material channel 21. The channel between each molding area 12 and the inner wall of the mold core groove 511 is a tube wall material channel 22. Each molding area 12 is provided with a front section airflow channel 11 along the length direction. The mold core middle section 62 is internally constructed with a plurality of The middle section airflow channel 8, each of which connects the rear section of a front section airflow channel 11 with the outside of the mold core, and multiple second material channels 9 are also constructed in the middle section 62 of the mold core. The rear part of the middle section 62 of the mold core is processed into a circular groove functional area 10 extending backward, and the rib material channel 21 and the tube wall material channel 22 are connected to the circular groove functional area 10. The circular groove functional area 10 is connected to the feed port 522. One end of the second material channel 9 is connected to the outside of the mold core, and the other end is connected to the circular groove functional area 10;

[0006] The mold core 6 is installed in the front mold opening 51 and the rear mold opening 52, and the mold core 6, the front mold opening 51 and the rear mold opening 52 are fixed together through mechanical connection.

[0007] In the utility model, the second material channel 9 facilitates further adding auxiliary materials to the extruded material through the circular groove functional area 10. These auxiliary materials are not limited to the form of liquid, powder, granules, etc. For example, the extruded product can have an irregular color distribution to enrich the product appearance.

[0008] As a preferred embodiment, the extrusion die further comprises a core mold sleeve 63 sleeved outside the core front section 61, and a secondary circular groove 512 is constructed at the rear section of the core groove 511 of the front die opening 51, the inner diameter of the secondary circular groove 512 is larger than the core groove 511, and the outer wall surface of the core mold sleeve 63 matches the core groove 511 and the secondary circular groove 512. The core mold sleeve 63 is used to adjust the outer diameter of the front end of the core mold. When the sleeve is sleeved on the front end of the core mold, the core mold is fixed in the core mold sleeve 63, and the core mold sleeve 63 is fixed in the front die opening 51. The outer wall surface of the core mold sleeve 63 matches the core groove 511 and the secondary circular groove 512, and the space between the inner wall surface and the molding area 12 of the core front section 61 is the tube wall material channel 22. In this way, the specifications of the tube wall material channel 22 can be adjusted by replacing sleeves of different specifications and sizes, thereby adjusting the thickness of the product.

[0009] In the present invention, the mechanical connection may be a screw connection.

[0010] Preferably, the cross-sections of the rib material channel 21 and the tube wall material channel 22 of the mold core 6 of the present invention form a symmetrical or asymmetrical shape, for example, a shape of numbers, letters, or other patterns.

[0011] Based on this, the number of the forming areas 12 of the present invention is 3 to 8, which is a reasonable and feasible solution.

[0012] As a preferred embodiment, the molding area 12 further includes a middle molding area 121 .

[0013] Preferably, in the present invention, the mold core is of one-piece construction, or a plurality of components are fixedly connected into one by riveting to ensure that the mold core has a certain strength.

[0014] In the present invention, the feed opening 522 is in a conical or cylindrical shape, that is, the feed opening adopts a progressive mode of feeding from wide to narrow in the same horizontal direction, or adopts a parallel mode of feeding.

[0015] As an optional embodiment, the front section and the middle section of the mold core are an integrated structure, or a segmented structure, connected in the middle by mechanical connection or high temperature resistant material.

[0016] In order to ensure the performance of the extrusion die of the multi-channel tube of the utility model, the extrusion die is made of a high temperature resistant metal material.

[0017] The utility model also provides a multi-channel tube prepared by the above extrusion die, wherein the multi-channel tube comprises a tube wall 3 with a circular cross-section and a plurality of ribs 2 arranged along the length direction of the multi-channel tube, wherein the edges of the ribs 2 are connected to the inner wall of the tube wall 3 or to adjacent ribs 2.

Brief Description of the Drawings

[0018] Figure 1A It is a stereogram of the extrusion die;

[0019] Figure 1B It is the AA section view of the extrusion die;

[0020] Figure 1C It is the main view of the extrusion die;

[0021] Figure 1D It is the front die cutaway view;

[0022] Figure 1E It is the cross-sectional view of the rear die;

[0023] Figure 2A It is a three-dimensional diagram of the mold core;

[0024] Figure 2B It is the AA section view of the mold core;

[0025] Figure 2C It is the main view of the mold core;

[0026] Figure 2D It is a cross-sectional view of the core mold casing;

[0027] Figure 3A is a front view of the Y-shaped multi-channel tube of Example 1;

[0028] Figure 3B is a three-dimensional diagram of a Y-shaped multi-channel tube of Example 1;

[0029] Figure 4A is a front view of the K-type multi-channel tube of Example 2;

[0030] Figure 4B is a stereoscopic diagram of a K-type multi-channel tube of Example 2;

[0031] Figure 5A is a front view of the lightning-type multi-channel tube of Example 3;

[0032] Figure 5B is a stereoscopic diagram of a lightning-type multi-channel tube of Example 3;

[0033] Fig. 6A is a front view of a cross-shaped multi-channel tube of Example 4;

[0034] Figure 6B is a stereogram of a cross-shaped multi-channel tube of Example 4;

[0035] Fig. 7A is a front view of the concentric multi-channel tube of Example 5;

[0036] Figure 7B is a stereoscopic diagram of a concentric multi-channel tube of Example 5;

[0037] Fig. 8A is a front view of a round-sky-square-square multi-channel tube of Example 6;

[0038] Figure 8B is a stereoscopic diagram of a round-sky-square-square multi-channel tube of Example 6;

[0039] Fig.9A is a front view of a pentagonal multi-channel tube of Example 7;

[0040] Fig. 9B is a stereogram of a pentagonal multi-channel tube of Example 7;

[0041] Fig. 10A is a front view of a football-shaped multi-channel tube of Example 8;

[0042] Fig. 10B is a stereoscopic diagram of a football-shaped multi-channel tube of Example 8;

[0043] Among them, 2-rib; 21-rib material channel; 22-tube wall material channel; 3-tube wall;

[0044] 5-die opening; 51-front die opening; 511-core groove; 512-secondary circular groove; 52-rear die opening; 521-third-level circular groove; 522-feeding port;

[0045] 6-mold core; 61-mold core front section; 62-mold core middle section; 63-core mold sleeve;

[0046] 7-bolt; 8-middle air flow channel; 9-second material channel; 10-circular groove functional area; 11-front air flow channel;

[0047] 12-forming area; 121-middle forming area [Specific implementation method]

[0048] The following embodiments are used to protect the technical solutions of the present utility model in a non-limiting manner.

[0049] In the present invention, for the convenience of description but not limitation, the direction toward discharging materials is referred to as "front", and the direction toward feeding materials is referred to as "rear".

[0050] Example 1

[0051] Structure as Figure 3A-3B The multi-channel tube shown in the figure has a Y-shaped structure in its cross section. The multi-channel tube is composed of a tube wall 3 with a circular cross section and three ribs 2 arranged along the length direction and dividing the circle into three equal parts, one edge of each rib 2 is connected to the inner wall of the tube wall 3, and the other edges are all connected together.

[0052] The multi-channel tube is produced by an extrusion process. The extrusion die is as follows: Figures 1A-2D As shown, it includes a die opening 5 and a die core 6 fixed by bolts 7.

[0053] The die opening 5 includes a front die opening 51 and a rear die opening 52 fixed together by eight bolts 7. The middle of the front die opening 51 is axially penetrated as a core groove 511, and the middle of the rear die opening 52 is axially penetrated, the front section is a three-stage circular groove 521, and the rear section is a feed opening 522. The inner diameter of the core groove 511 is smaller than the inner diameter of the three-stage circular groove 521. The feed opening 522 adopts a progressive mode from wide to narrow, so that the heated and melted material can pass through the feed opening 522, enter the material channel, and then be shaped.

[0054] The mold core 6 is an integral structure, and for ease of description it is divided into a core front section 61 and a core middle section 62 . The core front section 61 matches the core groove 511 , and the core middle section 62 matches the third-level circular groove 521 , that is, the mold core 6 can be installed inside the front mold opening 51 and the rear mold opening 52 .

[0055] The front section 61 of the core is composed of a plurality of molding areas 12 constructed along the length direction. The channel between two adjacent molding areas 12 is a rib material channel 21. The core mold sleeve 63 is sleeved outside the front section 61 of the core. A secondary circular groove 512 is constructed at the rear section of the core groove 511 of the front die opening 51. The inner diameter of the secondary circular groove 512 is larger than the core groove 511. The outer wall surface of the core mold sleeve 63 matches the core groove 511 and the secondary circular groove 512. The core mold sleeve 63 is used to adjust the outer diameter of the front end of the core mold. When the sleeve is sleeved on the front end of the core mold, the core mold is fixed in the core mold sleeve 63, and the core mold sleeve 63 is fixed in the front die opening 51. The outer wall surface of the core mold sleeve 63 matches the core groove 511 and the secondary circular groove 512. The space between the inner wall surface and the molding area 12 of the front section 61 of the core is the tube wall material channel 22.

[0056] Each molding area 12 is provided with a front section airflow channel 11 along the length direction, and a plurality of middle section airflow channels 8 are constructed inside the middle section 62 of the mold core. Each middle section airflow channel 8 connects the rear section of a front section airflow channel 11 with the outside of the mold core. A plurality of second material channels 9 are also constructed in the middle section 62 of the mold core. One end of the second material channel 9 is connected to the outside of the mold core, and the other end is connected to the rib material channel 21 or the tube wall material channel 22. The rear part of the middle section 62 of the mold core is processed into a circular groove functional area 10 extending backward, and the circular groove functional area 10 is connected to the feed port 522.

[0057] The second material channel 9 is convenient for further adding auxiliary materials to the extruded material. For example, as the extruded material is conveyed, additional pigments are added from the outside. These additional pigments cannot be evenly mixed with the extruded material, so as to leave irregular and random color distribution on the product as the extrusion action proceeds, so as to enrich the product appearance.

[0058] like Figures 2A-2D As shown, the front section 61 of the core is composed of a plurality of three fan-shaped forming areas 12 constructed along the length direction, the channel between two adjacent forming areas 12 is a rib material channel 21, and the space between the inner wall surface of the core sleeve 63 and the forming area 12 of the front section 61 of the core is a tube wall material channel 22. Each forming area 12 is provided with a front section airflow channel 11 along the length direction, and three middle section airflow channels 8 are provided in the middle section 62 of the core, and each middle section airflow channel 8 is connected to a front section airflow channel 11. The gas generated during the material flow molding process is discharged through the airflow channel 8 on the one hand, and discharged through the front section airflow channel 11 at the top of the core on the other hand, to ensure the smooth extrusion molding of the multi-channel tube.

[0059] Example 2

[0060] By replacing the mold core 6 to construct Figure 4A-4B In this embodiment, the cross-sectional shape of the mold core 6 of the utility model is an asymmetric pattern, thereby producing a multi-channel tube with a K-shaped cross-sectional shape.

[0061] Example 3

[0062] By replacing the mold core 6 to construct Figure 5A-5B Multichannel tube shown.

[0063] Example 4

[0064] By replacing the mold core 6 to construct Figure 6A-6B Multichannel tube shown.

[0065] Example 5

[0066] By replacing the mold core 6 to construct Figure 7A-7B In this embodiment, the molding area 12 further includes a middle molding area 121, and the cross-sectional shape of the middle molding area 121 is circular.

[0067] Example 6

[0068] By replacing the mold core 6 to construct Figures 8A-8B In this embodiment, the molding area 12 further includes a middle molding area 121, and the cross-sectional shape of the middle molding area 121 is a rectangle.

[0069] Example 7

[0070] By replacing the mold core 6 to construct Figures 9A-9B Multichannel tube shown.

[0071] Example 8

[0072] By replacing the mold core 6 to construct Figures 10A-10B In this embodiment, the molding area 12 further includes a middle molding area 121, and the cross-sectional shape of the middle molding area 121 is a regular hexagon.

Claims

1. An extrusion die for a multi-channel tube, the extrusion die comprising a die opening (5) and a die core (6), characterized in that The die opening (5) comprises a front die opening (51) and a rear die opening (52) which are fixed together by mechanical connection, the middle part of the front die opening (51) is axially penetrated as a core groove (511), the middle part of the rear die opening (52) is axially penetrated, the front section is a three-level circular groove (521), and the rear section is a feed port (522), and the inner diameter of the core groove (511) is smaller than the inner diameter of the three-level circular groove (521); The mold core (6) is divided into a mold core front section (61) and a mold core middle section (62), the mold core front section (61) matches the mold core groove (511), and the mold core middle section (62) matches the three-level circular groove (521); the mold core front section (61) is composed of a plurality of molding areas (12) constructed along the length direction, the channel between two adjacent molding areas (12) is a rib material channel (21), the channel between each molding area (12) and the inner wall of the mold core groove (511) is a tube wall material channel (22), each molding area (12) is provided with a front section airflow channel (11) along the length direction, and the inner structure of the mold core middle section (62) is A plurality of middle-section airflow channels (8) are provided, each of which connects the rear section of a front-section airflow channel (11) to the outside of the mold core. A plurality of second material channels (9) are also constructed in the middle section (62) of the mold core. The rear portion of the middle section (62) of the mold core is processed into a circular groove functional area (10) extending backward. The rib material channel (21) and the tube wall material channel (22) are connected to the circular groove functional area (10). The circular groove functional area (10) is connected to the feed port (522). One end of the second material channel (9) is connected to the outside of the mold core, and the other end is connected to the circular groove functional area (10). The mold core (6) is installed in the front mold opening (51) and the rear mold opening (52), and the mold core (6), the front mold opening (51) and the rear mold opening (52) are fixed together through mechanical connection.

2. The extrusion die of the multichannel tube according to claim 1, characterized in that The extrusion die also includes a core mold sleeve (63) sleeved outside the core front section (61); a secondary circular groove (512) is configured at the rear section of the core groove (511) of the front die opening (51); the inner diameter of the secondary circular groove (512) is larger than that of the core groove (511); the outer wall surface of the core mold sleeve (63) matches the core groove (511) and the secondary circular groove (512); and the space between the inner wall surface and the molding area (12) of the core front section (61) is a tube wall material channel (22).

3. The extrusion die of the multi-channel tube according to claim 1, characterized in that The mechanical connection is a screw connection.

4. The extrusion die of the multichannel tube according to claim 1, characterized in that The cross sections of the rib material channel (21) of the mold core (6) and the tube wall material channel (22) form a symmetrical or asymmetrical shape.

5. The extrusion die of the multi-channel tube according to claim 1, characterized in that The number of the forming zones (12) is 3 to 8.

6. The extrusion die of the multi-channel tube according to claim 1, characterized in that The molding area (12) further comprises a middle molding area (121).

7. The extrusion die of the multi-channel tube according to claim 1, characterized in that The mold core is constructed in one piece, or a plurality of parts are fixedly connected into one piece by riveting.

8. The extrusion die of the multi-channel tube according to claim 1, characterized in that The feed port (522) is in a conical or cylindrical shape.

9. The extrusion die of the multi-channel tube according to claim 1, characterized in that The extrusion die is made of high temperature resistant metal material.

10. The multichannel tube produced by the extrusion die according to any one of claims 1 to 9, characterized in that The multi-channel tube comprises a tube wall (3) with a circular cross-section and a plurality of ribs (2) arranged along the length direction of the multi-channel tube, wherein the edges of the ribs (2) are connected to the inner wall of the tube wall (3) or to adjacent ribs (2).

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