Novel die head structure of extruder

Abstract

The utility model provides a novel die head structure of an extruder, which comprises a sand cavity, a distribution plate A, a distribution plate B, a distribution plate C and a spinneret plate which are connected through a screw, a central through hole and a threaded hole and then are tightly attached, and fluid raw materials are distributed in a multi-layer manner through the sand cavity, the distribution plate A, the distribution plate B and the distribution plate C, so that the pressure is uniform; therefore, the flow is stable and uniform when the material is extruded from a spinneret orifice of the spinneret plate, namely, the material can be uniformly extruded, thereby improving the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to a novel die structure for an extruder. Background Technology

[0002] Existing extruder die structures use extruder heating to transform solid raw materials into a uniform viscous fluid. Under the action of the extrusion system, the fluid continuously passes through the die structure at a certain pressure and speed to obtain a specific shape, thus producing a product. However, due to factors such as the flow rate and pressure of the raw material during production, uneven distribution often occurs. This results in inconsistent flow rates in the spinneret area, leading to inconsistent product thickness, low yield, and consequently, reduced production efficiency. Utility Model Content

[0003] In view of the defects of existing extruder dies, the technical problem to be solved by this utility model is to provide a new type of extruder die structure that enables uniform pressure distribution, stable and uniform flow in the spinneret area, and uniform material extrusion, thereby improving production efficiency.

[0004] To achieve the above objectives, according to one aspect of this utility model, the present utility model is implemented through the following technical measures: a novel extruder die head structure, comprising a sand cavity, a distribution plate A, a distribution plate B, a distribution plate C, and a spinneret. The sand cavity, distribution plate A, distribution plate B, distribution plate C, and spinneret are each provided with a first end face and a second end face. Each of the distribution plate A, distribution plate B, distribution plate C, and spinneret has a central through hole at its center and positioning holes at its edges.

[0005] The sand cavity is provided with a number of evenly distributed small holes, and the center of the second end face of the sand cavity is provided with a threaded hole.

[0006] The distribution plate A is provided with uniformly distributed through holes;

[0007] The first end face of the distribution plate B is provided with a plurality of uniformly distributed through holes III and strip grooves, the through holes III and strip grooves being distributed alternately, the strip grooves being arranged radially, and each end of the strip grooves being provided with through holes IV;

[0008] The second end face of the distribution plate C is provided with an annular groove III, and the annular groove III is provided with through holes V and VI. A cross-shaped protrusion is provided at the through hole V on the second end face of the distribution plate C, and the height of the cross-shaped protrusion is the same as the depth of the annular groove III.

[0009] The spinneret has several evenly distributed feed holes on its first end face and a spinneret orifice on its second end face, which is opposite to the feed hole. The size of the feed hole is smaller than the size of the cross-shaped protrusion and larger than the size of the through hole V. The size of the spinneret orifice is smaller than the size of the feed hole. A positioning pin is installed in the positioning hole of the spinneret. The positioning pin passes through the positioning holes on the distribution plate C, distribution plate B and distribution plate A in sequence. The screw passes through the central through hole of the spinneret, distribution plate C, distribution plate B and distribution plate A in sequence and is connected to the threaded hole at the center of the second end face of the sand chamber. After connection, all components fit tightly together.

[0010] Furthermore, the first end face of the sand cavity is provided with a central groove I and an annular groove I surrounding the central groove, and small holes are evenly distributed in the central groove and the annular groove I.

[0011] Furthermore, the first end face of the distribution plate A is provided with a central groove II and an annular groove II surrounding the central groove. The central groove II is opposite to the central groove I. The central groove II is provided with uniformly distributed through holes I. The annular groove II is opposite to the annular groove I. The annular groove II is provided with uniformly distributed through holes II. The axial direction of the through holes I is inclined away from the center end, and the axial direction of the through holes II is inclined at the center. The through holes I and through holes II are arranged in a uniformly distributed circle on the second end face of the distribution plate A.

[0012] Furthermore, the through hole III on the distribution plate B is positioned opposite to the through hole II, and the strip groove is positioned opposite to the through hole I.

[0013] Furthermore, the first end face of the distribution plate C is provided with three annular grooves of different sizes, namely the first annular groove, the second annular groove, and the third annular groove. The second annular groove is wider and is opposite to the through hole III. The third annular groove is opposite to the through hole IV near the center end in the strip-shaped groove. The first annular groove is opposite to the through hole IV far from the center end in the strip-shaped groove. The through hole V is evenly distributed in the second annular groove, and the through hole VI is evenly distributed in the first and third annular grooves and located on both sides of the through hole V.

[0014] Furthermore, the spinneret is a concave quadrilateral.

[0015] Furthermore, the sand cavity, distribution plate A, distribution plate B, distribution plate C, and spinneret are all disc-shaped.

[0016] Compared with the prior art, the advantages of this utility model are as follows: The die head structure of this novel extruder ensures that the fluid raw material is evenly distributed after passing through multiple layers of sand chamber, distribution plate A, distribution plate B, and distribution plate C, so that the flow rate is stable and uniform when it is extruded at the spinneret nozzle, that is, the material can be extruded evenly, thereby improving production efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is an exploded view of the first end face of the die head structure of a novel extruder according to the present invention;

[0019] Figure 2 This is an exploded view of the second end face of the die head structure of a novel extruder according to the present invention.

[0020] Figure 3 This is a cross-sectional view of the distribution plate A and the spinneret described in this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Sand chamber; 2. Distribution plate A; 3. Distribution plate B; 4. Distribution plate C; 5. Spinneret; 6. Central through hole; 7. Positioning hole; 8. Central groove I; 9. Central groove II; 10. Annular groove I; 11. Annular groove II; 12. Annular groove III; 13. Through hole I; 14. Through hole II; 15. Through hole III; 16. Strip groove; 17. Through hole IV; 18. Through hole V; 19. Through hole VI; 20. Cross-shaped protrusion; 21. Feed hole; 22. Spinneret nozzle; 23. Positioning pin; 24. Screw; 25. Threaded hole; 26. First annular groove; 27. Second annular groove; 28. Third annular groove. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] Please refer to Figure 1 , Figure 2 The present embodiment provides a novel die structure for an extruder, including a sand chamber 1, a distribution plate A2, a distribution plate B3, a distribution plate C4, and a spinneret 5;

[0025] The sand cavity 1 is generally disc-shaped. The sand cavity 1 has a first end face and a second end face. The first end face of the sand cavity 1 has a central groove I8 and an annular groove I10 surrounding the central groove. Several small holes are evenly distributed in the central groove and the annular groove I10. The center of the second end face has a threaded hole 25.

[0026] The distribution plate A2 is generally disc-shaped, with a central through hole 6 in the center and positioning holes 7 at the edge of the second end face. The distribution plate A2 has a first end face and a second end face. The first end face has a central groove II9 and an annular groove II11 surrounding the central groove. The central groove II9 is ​​opposite to the central groove I8. The central groove II9 has evenly distributed through holes I13. The annular groove II11 is opposite to the annular groove I10. The annular groove II11 has evenly distributed through holes II14. (Refer to...) Figure 3 The axial direction of through hole I13 is inclined away from the center, and the axial direction of through hole II14 is inclined at the center. Through holes I13 and through holes II14 are arranged in a uniformly distributed circle on the second end face of the distribution plate A2.

[0027] The distribution plate B3 is generally disc-shaped, with a central through hole 6 in the center and positioning holes 7 at the edge. The distribution plate B3 has a first end face and a second end face. The first end face has several evenly distributed through holes Ⅲ15 and strip grooves 16. The through holes Ⅲ15 and strip grooves 16 are staggered one by one. The strip grooves 16 are arranged radially, with one end facing the center and the other end extending outward radially. Each end of the strip groove 16 has a through hole Ⅳ17, and the through holes Ⅲ15 and Ⅱ14 are opposite to each other, and the strip grooves 16 and Ⅰ13 are opposite to each other.

[0028] The distribution plate C4 is generally disc-shaped, with a central through hole 6 and positioning holes 7 at the edges. The distribution plate C4 has a first end face and a second end face. The second end face has an annular groove III12, within which are through holes V18 and VI19. The first end face has three annular grooves of different sizes: a first annular groove 26, a second annular groove 27, and a third annular groove 28. The second annular groove 27 is wider, while the first and third annular grooves 26 and 28 are narrower. The second annular groove 27 connects to the through hole... Hole III 15 is positioned opposite each other. The third annular groove 28 is positioned opposite to the through hole IV 17 near the center end of the strip groove 16. The first annular groove 26 is positioned opposite to the through hole IV 17 far from the center end of the strip groove 16. Through holes V 18 are evenly distributed in the second annular groove 27. Through holes VI 19 are evenly distributed in the first annular groove 26 and the third annular groove 28 and are located on both sides of through hole V 18. A cross-shaped protrusion 20 is provided at the through hole V 18 on the second end face of the distribution plate C4. The height of the cross-shaped protrusion 20 is the same as the depth of the annular groove III 12.

[0029] The spinneret 5 is generally disc-shaped with a central through hole 6 and positioning holes 7 at the edges. The spinneret 5 has a first end face and a second end face. The first end face has several evenly distributed feed holes 21. The size of the feed holes 21 is smaller than the size of the cross-shaped protrusion 20 and larger than the size of the through hole V18, so that the material can enter the feed holes 21 of the spinneret 5 from the through hole V18 in the center of the cross-shaped protrusion 20 and the edge of the cross-shaped protrusion 20. The second end face has a spinneret 22 opposite to the feed inlet. The shape of the spinneret 22 can be adjusted as needed. Here, a concave quadrilateral shape is preferred. The size of the spinneret 22 is smaller than the size of the feed hole 21. At the interface between the feed hole 21 and the spinneret 22, the feed hole 21 gradually narrows and then connects with the spinneret 22.

[0030] A positioning pin 23 is installed in the positioning hole 7 of the spinneret 5. The positioning pin 23 passes through the positioning holes 7 on the distribution plate C4, distribution plate B3, and distribution plate A2 in sequence. The screw 24 passes through the central through hole 6 of the spinneret 5, distribution plate C4, distribution plate B3, and distribution plate A2 in sequence and is connected to the threaded hole 25 at the center of the second end face of the sand chamber 1. After connection, all components fit tightly together.

[0031] This embodiment provides a novel die structure for an extruder. Fluid raw material enters the first end face of the sand cavity 1 under pressure, passing through small holes in the central groove I8 and annular groove I10 of the sand cavity 1 to the connection between the distribution plate A2 and the sand cavity 1. It then passes through through holes I13 and II14 of the distribution plate A2 to enter the strip-shaped groove 16 and through hole III15, respectively. After passing through the strip-shaped groove 16 and through hole III15 of the distribution plate B3, it enters the first annular groove 26, the third annular groove 28, and the second annular groove 27 of the distribution plate C4. After passing through the through holes VI19 in the first annular groove 26 and the third annular groove 28, and the through hole V18 in the second annular groove 27, the material enters the connection between the distribution plate C4 and the spinneret 5. It then enters the feed hole 21 of the spinneret 5 through the through holes V18 at the edge and center of the cross-shaped protrusion 20, respectively, and is finally extruded through the spinneret nozzle 22 of the spinneret 5. During the process, the material undergoes multiple stages of uniform and gradual pressure distribution, which ensures a stable and uniform flow rate when it is extruded through the spinneret nozzle 22 of the spinneret 5. This means that the material can be extruded uniformly, thereby improving production efficiency.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various changes and modifications can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel die head structure for an extruder, characterized in that: The device includes a sand chamber, distribution plate A, distribution plate B, distribution plate C, and a spinneret. Each of the sand chamber, distribution plate A, distribution plate B, distribution plate C, and spinneret has a first end face and a second end face. Each of the distribution plates A, B, C, and spinneret has a central through hole and positioning holes at its edges. The sand cavity is provided with a number of evenly distributed small holes, and the center of the second end face of the sand cavity is provided with a threaded hole. The distribution plate A is provided with uniformly distributed through holes; The first end face of the distribution plate B is provided with a plurality of uniformly distributed through holes III and strip grooves, the through holes III and strip grooves being staggered one by one, the strip grooves being radially arranged, and each end of the strip grooves being provided with through holes IV; The second end face of the distribution plate C is provided with an annular groove III, and the annular groove III is provided with through holes V and VI. A cross-shaped protrusion is provided at the through hole V on the second end face of the distribution plate C, and the height of the cross-shaped protrusion is the same as the depth of the annular groove III. The spinneret has several evenly distributed feed holes on its first end face and a spinneret orifice on its second end face, which is opposite to the feed hole. The size of the feed hole is smaller than the size of the cross-shaped protrusion and larger than the size of the through hole V. The size of the spinneret orifice is smaller than the size of the feed hole. A positioning pin is installed in the positioning hole of the spinneret. The positioning pin passes through the positioning holes on the distribution plate C, distribution plate B and distribution plate A in sequence. The screw passes through the central through hole of the spinneret, distribution plate C, distribution plate B and distribution plate A in sequence and is connected to the threaded hole at the center of the second end face of the sand chamber. After connection, all components fit tightly together.

2. The die head structure of the novel extruder according to claim 1, characterized in that: The first end face of the sand cavity is provided with a central groove I and an annular groove I surrounding the central groove, and small holes are evenly distributed in the central groove and the annular groove I.

3. The die head structure of the novel extruder according to claim 2, characterized in that: The distribution plate A has a central groove II and an annular groove II surrounding the central groove. The central groove II is opposite to the central groove I. The central groove II has uniformly distributed through holes I. The annular groove II is opposite to the annular groove I. The annular groove II has uniformly distributed through holes II. The axial direction of the through holes I is inclined away from the center end, and the axial direction of the through holes II is inclined at the center. The through holes I and through holes II are arranged in a uniform circle on the second end face of the distribution plate A.

4. The die head structure of the novel extruder according to claim 3, characterized in that: The through hole III on the distribution plate B is opposite to the through hole II, and the strip groove is opposite to the through hole I.

5. The die head structure of the novel extruder according to claim 1 or 4, characterized in that: The first end face of the distribution plate C is provided with three annular grooves of different sizes, namely the first annular groove, the second annular groove, and the third annular groove. The second annular groove is wider and is opposite to the through hole III. The third annular groove is opposite to the through hole IV near the center end in the strip-shaped groove. The first annular groove is opposite to the through hole IV far from the center end in the strip-shaped groove. The through hole V is evenly distributed in the second annular groove, and the through hole VI is evenly distributed in the first annular groove and the third annular groove and is located on both sides of the through hole V.

6. The die head structure of the novel extruder according to claim 1, characterized in that: The spinneret is a concave quadrilateral.

7. The die head structure of the novel extruder according to claim 1, characterized in that: The sand chamber, distribution plate A, distribution plate B, distribution plate C, and spinneret are all disc-shaped.

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