Preceding split head of edge strip extrusion die

Abstract

The utility model discloses a kind of edge strip extrusion mould pre-positioned shunt machine head, the pre-positioned shunt machine head is integrally structured by D printing, longitudinally and transversely interlaced and interconnected flow channel structure is set in pre-positioned shunt machine head, when high polymer material passes, high polymer material is repeatedly sheared and stirred by flow channel structure;Pre-positioned shunt machine head includes shunt plate and shunt cylinder, flow channel structure is set in shunt cylinder, two outlet flow channels are set in shunt plate, outlet flow channel penetrates shunt plate, the outlet area of outlet flow channel is less than the import area of outlet flow channel, outlet flow channel is interconnected with flow channel structure;Flow channel structure includes two first flow channels transversely penetrating shunt cylinder;The upper and lower sides of first flow channel are also respectively provided with two second flow channels penetrating shunt cylinder, the outside of second flow channel forms gap, so that second flow channel is interconnected with outside.

Description

Technical Field

[0001] This utility model relates to the field of extrusion die technology, and in particular to a front-mounted diverter head for a strip extrusion die. Background Technology

[0002] In the field of polymer extrusion molding, traditional multi-cavity molds face numerous technical challenges that urgently need to be addressed. Firstly, the simple flow channel design of traditional multi-cavity molds allows polymer materials to easily form a laminar flow state when flowing through the channels, resulting in uneven material distribution and significant differences in flow velocity between cavities. Taking a two-cavity mold as an example, the production speed difference between different cavities can reach 10%-15% compared to the fifth flow channel. For multi-cavity molds, this difference can even exceed 30% compared to the fifth flow channel. This speed difference makes automated cutting to a fixed length difficult to achieve. To ensure consistent product length, companies often have to uniformly cut according to the slowest cavity speed, resulting in significant material waste and a material loss rate as high as 20%-30% compared to the fifth flow channel.

[0003] Secondly, the flow channel structure of traditional molds has dead zones, where polymer materials easily get trapped, causing smearing. This not only affects product quality but also requires frequent shutdowns for mold cleaning, reducing production efficiency. Furthermore, traditional machining processes struggle to manufacture complex flow channel structures, limiting mold design innovation and failing to meet the requirements for uniform mixing and distribution of polymer materials.

[0004] Furthermore, traditional multi-cavity molds require multiple machines for short cutting due to inconsistent flow rates in each cavity, increasing equipment investment and maintenance costs, and also occupying more production space. Moreover, the inconsistent quality of products from different cavities necessitates significant manpower for subsequent testing and screening, further increasing production costs. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a front-mounted diverter head for edge strip extrusion molds, thereby solving the above-mentioned defects.

[0006] The objective of this utility model is achieved through the following technical solution: A front-end splitter head for edge strip extrusion molds is a one-piece structure formed by 3D printing. The front-end splitter head is provided with a crisscrossing and interconnected flow channel structure. When the polymer material passes through, it is repeatedly sheared and stirred by the flow channel structure.

[0007] In one or more embodiments of this utility model, the front-mounted flow divider head includes a flow divider plate and a flow divider cylinder. The flow channel structure is disposed inside the flow divider cylinder. The flow divider plate is provided with two outlet flow channels. The outlet flow channels penetrate the flow divider plate. The outlet area of ​​the outlet flow channels is smaller than the inlet area of ​​the outlet flow channels. The outlet flow channels are connected to the flow channel structure.

[0008] In one or more embodiments of this utility model, the flow channel structure includes two first flow channels that penetrate the flow divider tube laterally; two second flow channels that penetrate the flow divider tube are also respectively opened on the upper and lower sides of the first flow channels, and the outer side of the second flow channels forms a notch so that the second flow channels are connected to the outside.

[0009] In one or more embodiments of this utility model, the flow channel structure further includes a third flow channel that longitudinally penetrates the flow divider cylinder, the middle part of the third flow channel penetrates the first flow channel, and the two ends of the third flow channel are respectively located in the second flow channel at corresponding positions.

[0010] In one or more embodiments of this utility model, the flow channel structure further includes a fourth flow channel and a fifth flow channel that longitudinally penetrate the flow divider. The fourth and fifth flow channels are symmetrical in structure. The fourth and fifth flow channels are respectively penetrated by different first flow channels. The two ends of the fourth and fifth flow channels are respectively located in the second flow channels at corresponding positions. The fourth flow channel is connected to the outlet flow channel.

[0011] In one or more embodiments of this utility model, the flow channel structure further includes a sixth flow channel opened inside the flow divider, one end of the sixth flow channel being connected to the outlet flow channel and the fourth flow channel, and the other end being connected to the first flow channel.

[0012] In one or more embodiments of this utility model, the flow channel structure further includes a plurality of through holes opened on the outer planar end face of the flow divider, and the plurality of through holes are all connected to the fifth flow channel.

[0013] In one or more embodiments of this utility model, a circular ring plate is also fixed at the connection between the flow divider plate and the flow divider cylinder.

[0014] The beneficial effects of this utility model are: This invention proposes a front-mounted diverter head for edge strip extrusion dies, manufactured using 3D printing technology. The unique flow channel structure effectively disrupts the laminar flow of polymer materials, enabling repeated shearing and mixing to ensure uniform material entry into each cavity. Actual testing shows a 5%-8% increase in synchronization rate for dual-cavity products and a 15-20% increase for multi-cavity products, significantly reducing material loss. Furthermore, the integrated flow channel structure eliminates dead zones, mitigating the risk of material smearing. It also perfectly integrates with the extruder barrel, preventing directional material flow due to screw rotation. This comprehensively improves the production efficiency and product quality of multi-cavity dies while reducing production costs and equipment maintenance complexity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is the front view of this utility model; Figure 3 This is a top view of the present invention; Figure 4 This is the right view of the present invention; Figure 5 This is the right view of this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0017] In this embodiment, as Figures 1 to 5 As shown, a pre-diffusion head for edge strip extrusion molds is a 3D-printed integrated structure. The pre-diffusion head features a crisscrossing and interconnected flow channel structure. As the polymer material passes through, it is repeatedly sheared and agitated by this flow channel structure. Using this type of head for dual-cavity or even multi-cavity production can significantly reduce the production speed difference between different cavities. For most dual-cavity products, the synchronization rate is improved by 5%-8%, and for multi-cavity products, by 15-20%. Conventional multi-cavity molds often require multiple machines for short-cutting due to the different production speeds of different cavities / cells. For molds with more than two cavities, cutting is often done uniformly according to the slowest cavity speed, resulting in significant material waste. This head significantly reduces material loss. The special flow channel structure of this head allows the polymer material to be repeatedly sheared and agitated as it passes through, disrupting its laminar flow state. This ensures that the material enters each cavity more evenly without bias due to screw rotation. This flow channel structure cannot be formed using traditional machining processes. The entire flow channel structure is integral and can be perfectly formed using 3D printing, thus solving the risk of polymer materials getting stuck in dead zones and sticking together.

[0018] Traditional molds are basically single-cavity, and multi-cavity designs can easily lead to uneven flow rates in each cavity, resulting in different extrusion speeds for the products, which is not conducive to automated cutting and length determination. However, this die head uses 3D metal printing technology to create a special die head structure. Its flow channel structure can more evenly disperse the laminar flow of polymer materials, achieving the function of thorough mixing and stirring. At this time, multi-cavity flow diversion of the mold can significantly reduce the problem of asynchronous flow between different cavities.

[0019] In one or more embodiments of this utility model, the pre-dividing die head includes a dividing plate 1 and a dividing cylinder 2. The flow channel structure is disposed within the dividing cylinder 2. The dividing plate 1 has two outlet flow channels 11, which penetrate the dividing plate 1. The outlet area of ​​the outlet flow channel 11 is smaller than the inlet area of ​​the outlet flow channel 11, and the outlet flow channel 11 is connected to the flow channel structure. The outlet flow channel 11 is used for extrusion molding of polymer materials.

[0020] In one or more embodiments of this utility model, the flow channel structure includes two first flow channels 21 that penetrate the flow divider 2 laterally; two second flow channels 22 that penetrate the flow divider 2 are respectively opened on the upper and lower sides of the first flow channels 21, and the outer side of the second flow channels 22 forms a notch so that the second flow channels 22 are connected to the outside.

[0021] In this embodiment, there are two first flow channels 21, which are complete cylindrical holes; there are four second flow channels 22, which are located on the upper and lower sides of the second flow channels 22 respectively, and the four second flow channels 22 and the two second flow channels 22 form two vertical columns; the center lines of the first flow channels 21 and the second flow channels 22 are parallel, and the directions of the first flow channels 21 and the second flow channels 22 are parallel to the length direction of the flow divider plate 1.

[0022] In one or more embodiments of this utility model, the flow channel structure further includes a third flow channel 23 that extends longitudinally through the flow divider 2, the middle part of the third flow channel 23 penetrates the first flow channel 21, and the two ends of the third flow channel 23 are respectively located in the second flow channel 22 at corresponding positions.

[0023] In this embodiment, the third flow channel 23 is specifically configured as four, arranged in a rectangular array. The two ends of two of the third flow channels 23 are located within the second flow channels 22 in the same column, and the two ends of the other two third flow channels 23 are located within the second flow channels 22 in another column. The cross-section of the third flow channel 23 is blade-shaped. Two adjacent third flow channels 23 are not located in the same column, but their middle parts are connected. The direction of the third flow channel 23 is parallel to the width direction of the flow divider plate 1.

[0024] In one or more embodiments of this utility model, the flow channel structure further includes a fourth flow channel 24 and a fifth flow channel 25 that longitudinally penetrate the flow divider 2. The fourth flow channel 24 and the fifth flow channel 25 are symmetrical in structure. The fourth flow channel 24 and the fifth flow channel 25 are respectively penetrated by different first flow channels 21, and the two ends of the fourth flow channel 24 and the fifth flow channel 25 are respectively located in the corresponding second flow channels 22. The fourth flow channel 24 is connected to the outlet flow channel 11.

[0025] In this embodiment, the cross-sections of the fourth flow channel 24 and the fifth flow channel 25 are crescent-shaped, and the third flow channel 23 is located between the fourth flow channel 24 and the fifth flow channel 25.

[0026] In one or more embodiments of this utility model, the flow channel structure further includes a sixth flow channel 26 opened inside the flow divider 2. One end of the sixth flow channel 26 is connected to the outlet flow channel 11 and the fourth flow channel 24, and the other end is connected to the first flow channel 21.

[0027] In one or more embodiments of this utility model, the flow channel structure further includes a plurality of through holes 27 opened on the outer planar end face of the flow divider 2, and the plurality of through holes 27 are all connected to the fifth flow channel 25.

[0028] In this embodiment, four through holes 27 are specifically provided. The overall shape of the through holes 27 is an elongated hole with an arc shape.

[0029] In one or more embodiments of this utility model, a circular ring plate 3 is also fixed at the connection between the flow divider 1 and the flow divider cylinder 2.

[0030] In this embodiment, a stepped structure is formed by the annular plate 3, which is adapted to the extruder barrel. When the die head is in use, it is used in conjunction with the extruder barrel, which is sleeved on the flow divider 2 and cooperates with the flow channel structure so that when entering different cavities, there will be no bias due to the rotation of the extruder barrel, and the extruder head can enter each cavity more evenly.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A pre-diverter head for edge strip extrusion dies, characterized in that: The front splitter head is a 3D printed integral structure. The front splitter head is provided with a crisscrossing and interconnected flow channel structure. When the polymer material passes through, it is repeatedly sheared and stirred by the flow channel structure.

2. The pre-diverter head of the edge strip extrusion die according to claim 1, characterized in that: The front-end flow divider head includes a flow divider plate (1) and a flow divider cylinder (2). The flow channel structure is set inside the flow divider cylinder (2). The flow divider plate (1) is provided with two outlet flow channels (11). The outlet flow channels (11) penetrate the flow divider plate (1). The outlet area of ​​the outlet flow channel (11) is smaller than the inlet area of ​​the outlet flow channel (11). The outlet flow channel (11) is connected to the flow channel structure.

3. The pre-diverter head of the edge strip extrusion die according to claim 2, characterized in that: The flow channel structure includes two first flow channels (21) that penetrate the flow divider (2) laterally; two second flow channels (22) that penetrate the flow divider (2) are also opened on the upper and lower sides of the first flow channel (21), and the outer side of the second flow channel (22) forms a notch so that the second flow channel (22) is connected to the outside.

4. The pre-diverter head of the edge strip extrusion die according to claim 3, characterized in that: The flow channel structure also includes a third flow channel (23) that runs longitudinally through the splitter tube (2), the middle of the third flow channel (23) runs through the first flow channel (21), and the two ends of the third flow channel (23) are respectively located in the second flow channel (22) at corresponding positions.

5. The pre-diverter head of the edge strip extrusion die according to claim 4, characterized in that: The flow channel structure also includes a fourth flow channel (24) and a fifth flow channel (25) that longitudinally penetrate the flow divider (2). The fourth flow channel (24) and the fifth flow channel (25) are symmetrical in structure. The fourth flow channel (24) and the fifth flow channel (25) are respectively penetrated by different first flow channels (21), and the two ends of the fourth flow channel (24) and the fifth flow channel (25) are respectively located in the corresponding second flow channels (22). The fourth flow channel (24) is connected to the outlet flow channel (11).

6. The pre-diverter head of the edge strip extrusion die according to claim 5, characterized in that: The flow channel structure also includes a sixth flow channel (26) opened inside the flow divider (2). One end of the sixth flow channel (26) is connected to the outlet flow channel (11) and the fourth flow channel (24), and the other end is connected to the first flow channel (21).

7. The pre-diverter head of the edge strip extrusion die according to claim 5, characterized in that: The flow channel structure also includes several through holes (27) opened on the outer plane end face of the flow divider (2), and several of the through holes (27) are connected to the fifth flow channel (25).

8. The front-mounted diverter head of a strip extrusion die according to claim 2, characterized in that: A ring plate (3) is also fixed at the connection between the flow divider (1) and the flow divider (2).

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