Three-color die head structure of extruder

Abstract

The three-color die head structure comprises a sand cavity, a distribution plate A, a distribution plate B, a distribution plate C, a distribution plate D, a spinneret plate and a positioning pin, raw materials of all colors reach the spinneret plate through respective paths from the sand cavity and are not communicated with one another, and the raw materials of a triangular groove enter from the edge of a round hole in the first end face of the spinneret plate and are separated from the first end face of the spinneret plate. Raw materials of the rectangular through holes enter from the center of the round hole in the first end face of the spinneret plate, reach the interior of the round hole of the spinneret plate and then are extruded into an integrated three-color structure, the three-color co-extrusion can be completed through a spinneret opening of the spinneret plate, and the attractiveness of a three-color product is higher; through step-by-step pressure division of the multiple layers of distribution plates, the three-color materials uniformly reach the round holes in the first end face of the spinneret plate, the effect of uniformly extruding the three-color materials is achieved, the qualified rate of produced products is high, the filaments are not prone to being broken, and the production efficiency is higher; the inner ring groove and the outer ring groove can be used for producing double-color products by adopting the same-color raw materials, and the three feeding holes can be used for producing single-color products by adopting the same-color raw materials, so that the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to extruder technical field, specifically is a kind of three-color die head structure of extruder. BACKGROUND

[0002] The existing extruder die head structure makes solid raw materials into uniform viscous fluid by the heating of extruder, and under the action of extrusion system, certain shape is obtained by passing through die head structure continuously with certain pressure and speed, so as to obtain product, due to the factors such as flow rate and pressure of raw materials entering in production process, uneven distribution phenomenon often exists, under the influence of this phenomenon, the flow of raw materials at spinneret is inconsistent, so as to cause the product after forming to be thick and thin, low pass rate, easy to break filament, and further affect production efficiency, especially when producing multi-color products, due to multi-channel co-extrusion, more uneven pressure situation is more likely to occur, and the influence is greater. SUMMARY

[0003] In view of the defects of the existing extruder die head structure, the technical problem to be solved by the utility model is to provide a three-color die head structure of extruder, which uniformly disperses pressure through multiple distribution plates, so that the flow of spinneret area is stable and uniform, and the produced product is not easy to break filament, and the production efficiency is higher.

[0004] In order to achieve the above purpose, according to one aspect of the utility model, the utility model is realized by the following technical measures: a three-color die head structure of extruder, including sand cavity, distribution plate A, distribution plate B, distribution plate C, distribution plate D, spinneret, positioning pin, the sand cavity, distribution plate A, distribution plate B, distribution plate C, distribution plate D and spinneret are all provided with first end face and second end face, the center of distribution plate A, distribution plate B, distribution plate C, distribution plate D and spinneret is provided with center through hole, and the edge is provided with positioning hole,

[0005] The first end face of the sand cavity is provided with three uniformly distributed feed ports, the bottom of the feed port is provided with a plurality of uniformly distributed small holes, the second end face of the sand cavity is provided with threaded hole in the center, and the edge is provided with positioning hole;

[0006] The first end face of the distribution plate A is provided with guide hole corresponding to the position of the feed port of the sand cavity;

[0007] The first end face of the distribution plate B is provided with three arc grooves I, three recesses I corresponding to the position of the guide hole, three recesses I are respectively communicated with an arc groove I, three arc grooves I are not communicated, and the two ends of arc groove I are respectively provided with through hole I communicated with the second end face of distribution plate B;

[0008] The first end surface of the distribution plate C is provided with six arc-shaped grooves II, which are not communicated with each other, and each of the two ends of the arc-shaped groove II is provided with a through hole II communicating with the second end surface of the distribution plate C, each of the arc-shaped grooves II corresponds to one through hole I of the arc-shaped groove I and is communicated with the through hole I.

[0009] The first end surface of the distribution plate D is provided with three annular grooves, which are an outer annular groove, a middle annular groove and an inner annular groove, a plurality of through holes III evenly distributed and communicated with the second end surface are arranged in the outer annular groove and the inner annular groove, a plurality of recesses II evenly distributed are arranged in the middle annular groove, a rectangular through hole communicating with the second end surface is arranged at the bottom of the recess II, the through holes III of the outer annular groove and the inner annular groove are symmetrically distributed on both sides of the rectangular through hole, a triangular groove is arranged at the through hole III of the second end surface of the distribution plate D, the bottom side of the triangular groove is parallel to the long side of the rectangular through hole, and the triangular groove and the rectangular through hole are not communicated with each other.

[0010] The first end surface of the spinneret is provided with a plurality of evenly distributed circular holes, the positions of the circular holes correspond to the rectangular through hole, the diameter of the circular hole is greater than the length of the rectangular through hole, the center of the circular hole is communicated with the rectangular through hole, and the periphery of the circular hole is communicated with the triangular groove, the second end surface of the spinneret is provided with a spinneret hole corresponding to the circular hole, and the size of the spinneret hole is smaller than that of the circular hole.

[0011] A positioning pin is arranged in the positioning hole of the spinneret, the positioning pin passes through the positioning holes of the distribution plate D, the distribution plate C, the distribution plate B, the distribution plate A and the sand cavity in sequence, a screw passes through the center through holes of the spinneret, the distribution plate D, the distribution plate C, the distribution plate B and the distribution plate A in sequence and is connected to the threaded hole at the center of the second end surface of the sand cavity after connection, and the components are tightly attached after connection.

[0012] Further, the sand cavity, the distribution plate A, the distribution plate B, the distribution plate C, the distribution plate D and the spinneret are all disc-shaped.

[0013] Further, the positioning hole is at least two, and the positioning holes are unevenly distributed.

[0014] Further, the upper end of the material guiding hole is funnel-shaped, the lower end is cylindrical and is communicated with the second end surface of the distribution plate A.

[0015] Further, the arc-shaped grooves I are inner arc-shaped grooves, middle arc-shaped grooves and outer arc-shaped grooves, the six arc-shaped grooves II are two inner grooves, two middle grooves and two outer grooves, the arc-shaped grooves II correspond to each other, and the arc-shaped grooves II are symmetrically distributed at the center of the distribution plate C, and the middle positions of the arc-shaped grooves II correspond to the through holes I in the arc-shaped grooves I.

[0016] Further, the spinneret hole is concave quadrilateral.

[0017] Compared with the prior art, the three-color die head structure of the extruder has the advantages that the different color raw materials reach the spinneret through their respective paths from the sand cavity and are not communicated with each other, the raw material of the triangular groove enters from the edge of the first end face circular hole of the spinneret, the raw material of the rectangular through hole enters from the center of the first end face circular hole of the spinneret, and after reaching the inside of the circular hole of the spinneret, the raw material is extruded into an integrated three-color structure and is extruded through the spinning port of the spinneret, so that three-color co-extrusion can be completed, the three-color product is more beautiful, through the step-by-step pressure distribution of the multiple distribution plates, the raw material uniformly reaches the first end face circular hole of the spinneret, the effect of uniformly extruding three-color materials is achieved, the qualified rate of the produced product is high, the product is not easy to break, and the production efficiency is higher; the inner ring groove and the outer ring groove can also produce two-color products by using the same color raw material, and the three feed ports can also produce single-color products by using the same color raw material, and the practicability is high. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain embodiments of the present application and not to limit the present application unnecessarily. In the drawings:

[0019] Figure 1 It is a first end face side explosion view of the three-color die head structure of the extruder according to the present application.

[0020] Figure 2 It is a second end face side explosion view of the three-color die head structure of the extruder according to the present application.

[0021] Figure 3 It is a first end face view of the distribution plate B according to the present application.

[0022] Figure 4 It is a partial enlarged view of the distribution plate D and the spinneret according to the present application.

[0023] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain embodiments of the present application and not to limit the present application unnecessarily. In the drawings: 1, sand cavity; 101, feed port; 102, threaded hole; 2, distribution plate A; 201, material guiding hole; 3, distribution plate B; 301, inner arc groove; 302, middle arc groove; 303, outer arc groove; 304, groove I; 305, through hole I; 4, distribution plate C; 401, inner groove; 402, middle groove; 403, outer groove; 404, through hole II; 5, distribution plate D; 501, inner ring groove; 502, middle ring groove; 503, outer ring groove; 504, through hole III; 505, rectangular through hole; 506, triangular groove; 507, groove II; 6, spinneret; 601, circular hole; 602, spinning port; 7, positioning pin; 8, screw; 9, center through hole; 10, positioning hole. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "bottom", "top", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0026] Please refer to Figure 1 , Figure 2 This embodiment provides a three-color die head structure for an extruder, including a sand chamber 1, a distribution plate A2, a distribution plate B3, a distribution plate C4, a distribution plate D5, a spinneret 6, and a positioning pin 7. The sand chamber 1, distribution plate A2, distribution plate B3, distribution plate C4, distribution plate D5, and spinneret 6 are all disc-shaped and each has a first end face and a second end face. Each of the distribution plates A2, B3, C4, D5, and 6 has a central through hole 9 at its center, and each has a positioning pin 7 at its edge. The sand chamber 1 has positioning holes 10. The first end face of the sand chamber 1 has three evenly distributed feed inlets 101. The bottom of each feed inlet 101 has several evenly distributed small holes that connect to the second end face. The center of the second end face of the sand chamber 1 has a threaded hole 102, and the edge has positioning holes 10. The first end face of the distribution plate A2 has three guide holes 201 corresponding to the positions of the feed inlets 101 of the sand chamber 1. The upper end of each guide hole 201 is funnel-shaped, and the lower end is cylindrical and connects to the second end face. Please refer to... Figure 3 The first end face of the distribution plate B3 is provided with three arc-shaped grooves I and three circular grooves I 304 corresponding one-to-one with the positions of the guide holes 201. The arc-shaped grooves I are preferably semi-circular grooves concentric with the distribution plate B3, namely inner arc-shaped groove 301, middle arc-shaped groove 302, and outer arc-shaped groove 303. Each of the three circular grooves I 304 is connected to one arc-shaped groove I, and the three arc-shaped grooves I are not connected to each other. Each arc-shaped groove I has a through hole I 305 at both ends connecting to the second end face of the distribution plate B3. The first end face of the distribution plate C4 is provided with six arc-shaped grooves II, which are not connected to each other, namely two inner grooves 401, two middle grooves 402, and two outer grooves 403. The arc-shaped grooves II are paired and symmetrically distributed with respect to the center of the distribution plate C4. Each arc-shaped groove II has a through hole II 404 at both ends connecting to the second end face. The middle position of the arc-shaped groove II corresponds to the through hole I 305 in the arc-shaped groove I. Please refer to Figure 4, the first end surface of the distribution plate D5 is provided with three annular grooves, which are an outer annular groove 503, a middle annular groove 502 and an inner annular groove 501, the outer annular groove 503 and the inner annular groove 501 are provided with four through holes Ⅲ 504 which are uniformly distributed and communicate with the second end surface, the middle annular groove 502 is provided with four circular grooves Ⅱ 507 which are uniformly distributed, the bottom of the circular groove Ⅱ 507 is provided with a rectangular through hole 505 which communicates with the second end surface, the through holes Ⅲ 504 of the outer annular groove 503 and the inner annular groove 501 are symmetrically distributed on both sides of the long side of the rectangular through hole 505, the second end surface of the distribution plate D5 is provided with a triangular groove 506 at the through hole Ⅲ 504, the bottom side of the triangular groove 506 is parallel to the long side of the rectangular through hole 505, and the triangular groove 506 and the rectangular through hole 505 are not communicated with each other; the first end surface of the spinneret plate 6 is provided with a plurality of circular holes 601 which are uniformly distributed, the position of the circular hole 601 corresponds to the rectangular through hole 505, and the diameter of the circular hole 601 is greater than the length of the rectangular through hole 505, the center of the circular hole 601 communicates with the rectangular through hole 505, the periphery of the circular hole 601 communicates with the triangular groove 506, the second end surface of the spinneret plate 6 is provided with a spinneret hole 602 corresponding to the circular hole 601, the size of the spinneret hole 602 is smaller than that of the circular hole 601, the circular hole 601 is gradually tapered and connected to the spinneret hole 602, the shape of the spinneret hole 602 can be adjusted as needed, and the spinneret hole 602 of the embodiment is preferably a concave quadrilateral, the second end surface of the spinneret plate 6 is provided with a circular groove, the center of the circular groove is provided with a center through hole 9, the center through hole 9 is convenient for screw 8 connection, the first end surface of the spinneret plate 6 is provided with a positioning hole 10, the positioning hole 10 is at least two, and the line connecting the two positioning holes 10 does not pass through the center of the spinneret plate 6.

[0027] The three-color die structure of the extruder provided in the embodiment is installed, the positioning pin 7 passes through the positioning holes 10 of the distribution plate D5, the distribution plate C4, the distribution plate B3, the distribution plate A2 and the sand cavity 1 in turn, the screw 8 passes through the center through holes 9 of the spinneret plate 6, the distribution plate D5, the distribution plate C4, the distribution plate B3 and the distribution plate A2 in turn and is connected to the threaded hole 102 at the center of the second end surface of the sand cavity 1, and after connection, the components are tightly attached.

[0028] The three-color die structure of the extruder provided by the embodiment is used, and each color fluid raw material enters the feed port 101 of the first end face of the sand cavity 1 under the action of pressure, respectively passes through the small hole at the bottom of the corresponding feed port 101 of the first end face of the sand cavity 1, enters the connection between the distribution plate A2 and the sand cavity 1, then respectively enters the connection between the distribution plate A2 and the distribution plate B3 through the guide hole 201 of the distribution plate A2, respectively enters an arc-shaped groove I through the groove I 304, respectively enters an arc-shaped groove II on the distribution plate C4 from the through hole I 305 at the two ends of the arc-shaped groove I, respectively enters the annular groove of the distribution plate D5 through the through hole II 404, and the raw materials in the inner annular groove 501 and the outer annular groove 503 enter the triangular groove 506 on the second end face of the distribution plate D5 from the through hole III 504 of the inner annular groove 501 and the outer annular groove 503, respectively, and the raw material in the middle annular groove 502 enters the round hole 601 of the spinneret plate 6 from the rectangular through hole 505. At this time, each color raw material reaches the round hole 601 at the first end face of the spinneret plate 6 uniformly through the step-by-step pressure distribution of the multiple distribution plates from the sand cavity 1, each raw material reaches the spinneret plate 6 through the respective path and is not communicated with each other, the raw material in the triangular groove 506 enters from the edge of the round hole 601 at the first end face of the spinneret plate 6, the raw material in the rectangular through hole 505 enters from the center of the round hole 601 at the first end face of the spinneret plate 6, and after reaching the inside of the round hole 601 of the spinneret plate 6, the raw materials are extruded into an integrated three-color structure and are extruded through the spinning port 602 of the spinneret plate 6.

[0029] The above only provides preferred embodiments of the utility model and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A three-color die structure of an extruder, characterized by: The sand cavity, the distribution plate A, the distribution plate B, the distribution plate C, the distribution plate D and the spinneret plate are provided with first end faces and second end faces, and the center of the distribution plate A, the distribution plate B, the distribution plate C, the distribution plate D and the spinneret plate is provided with a center through hole, and the edge thereof is provided with a positioning hole, The first end face of the sand cavity is provided with three uniformly distributed feeding ports, the bottom of the feeding port is provided with a plurality of uniformly distributed small holes, the center of the second end face of the sand cavity is provided with a threaded hole, and the edge thereof is provided with a positioning hole; The first end face of the distribution plate A is provided with a material guiding hole corresponding to the position of the feeding port of the sand cavity; The first end face of the distribution plate B is provided with three arc-shaped grooves I and three grooves I corresponding to the position of the material guiding hole, the three grooves I are respectively connected to one arc-shaped groove I, the three arc-shaped grooves I are not connected to each other, and the two ends of the arc-shaped groove I are respectively provided with a through hole I connected to the second end face of the distribution plate B; The first end face of the distribution plate C is provided with six arc-shaped grooves II, the arc-shaped grooves II are not connected to each other, the two ends of the arc-shaped groove II are respectively provided with a through hole II connected to the second end face of the distribution plate C, and each arc-shaped groove II is respectively corresponding to and connected to one through hole I of the arc-shaped groove I. The first end face of the distribution plate D is provided with three annular grooves, which are an outer annular groove, a middle annular groove and an inner annular groove, a plurality of uniformly distributed through holes III connected to the second end face are arranged in the outer annular groove and the inner annular groove, a plurality of uniformly distributed grooves II are arranged in the middle annular groove, the bottom of the groove II is provided with a rectangular through hole connected to the second end face, the through holes III of the outer annular groove and the inner annular groove are symmetrically arranged on both sides of the rectangular through hole, the second end face of the distribution plate D is provided with a triangular groove at the through hole III, the bottom side of the triangular groove is parallel to the long side of the rectangular through hole, and the triangular groove and the rectangular through hole are not connected to each other; The first end face of the spinneret plate is provided with a plurality of uniformly distributed circular holes, the position of the circular hole corresponds to the rectangular through hole, the diameter of the circular hole is greater than the length of the rectangular through hole, the center of the circular hole is connected to the rectangular through hole, the periphery of the circular hole is connected to the triangular groove, and the second end face of the spinneret plate is provided with a spinneret port corresponding to the circular hole, the size of the spinneret port is smaller than that of the circular hole; The positioning hole of the spinneret plate is provided with a positioning pin, the positioning pin passes through the positioning holes of the distribution plate D, the distribution plate C, the distribution plate B, the distribution plate A and the sand cavity in sequence, and a screw passes through the center through holes of the spinneret plate, the distribution plate D, the distribution plate C, the distribution plate B and the distribution plate A in sequence and is connected to the threaded hole in the center of the second end face of the sand cavity, and after connection, the components are tightly attached.

2. The three-color die structure of an extruder according to claim 1, characterized by: The sand cavity, the distribution plate A, the distribution plate B, the distribution plate C, the distribution plate D and the spinneret plate are all disc-shaped.

3. The three-color die structure of an extruder according to claim 1 or 2, characterized by: The positioning hole is at least two, and the positioning holes are unevenly distributed.

4. The three-color die structure of an extruder according to claim 3, characterized by: The upper end of the material guiding hole is funnel-shaped, and the lower end is cylindrical and connected to the second end face of the distribution plate A.

5. The three-color die structure of an extruder according to claim 3, characterized by: The arc-shaped grooves I are respectively inner arc-shaped grooves, middle arc-shaped grooves and outer arc-shaped grooves, the six arc-shaped grooves II are respectively two inner grooves, two middle grooves and two outer grooves, the arc-shaped grooves II correspond to each other, and are symmetrically distributed around the center of the distribution plate C, and the middle positions of the arc-shaped grooves II respectively correspond to the through holes I in the arc-shaped grooves I.

6. The three-color die structure of an extruder according to claim 3, characterized by: The shape of the spinneret port is concave quadrilateral.

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