Novel extrusion element

Abstract

The utility model discloses a novel extrusion element which comprises a sleeve and a plurality of screw flights, the sleeve is sleeved on a mandrel, the cross section of the sleeve is conical, the plurality of screw flights are annularly arranged on the outer surface of the sleeve at equal intervals, and the diameters of the screw flights are gradually reduced outwards along the outer surface of the sleeve. According to the extrusion element disclosed by the utility model, materials are fully mixed and homogenized in the extrusion process through the design of the conical sleeve and the multi-spiral screw flights, so that the mixing effect can be further improved, the density of a product is more uniform, and the product has better physical properties.

Description

TECHNICAL FIELD

[0001] The utility model relates to extrusion element field, concretely relates to a novel extrusion element. BACKGROUND

[0002] Parallel double screw extruder is composed of feeding section, conveying section, melting mixing section, natural exhaust section, mixing section, vacuum exhaust section, extrusion metering section. Among them, the mixing section is to make the material fully mixed, so that the product meets various performance indicators, and is particularly important among the sections. Thus, the screw configuration design of the mixing section has very important significance. And the existing screw generally comprises a plurality of extrusion elements which are sequentially sleeved on the mandrel in a certain order and interval, therefore, how to design an extrusion element which can fully mix the material is particularly important. SUMMARY

[0003] The utility model aims at providing a novel extrusion element to solve the problems mentioned in the background.

[0004] To solve the above technical problems, the utility model provides a novel extrusion element, which comprises a sleeve and a plurality of screw ridges, the sleeve is sleeved on the mandrel, the cross section of the sleeve is conical, a plurality of screw ridges are arranged on the outer surface of the sleeve in a ring shape at equal intervals, and the diameter of the screw ridge gradually decreases outward along the outer surface of the sleeve.

[0005] Further, the first end of the screw ridge corresponds to the short end of the outer diameter of the sleeve, and the end face of the first end of the screw ridge is an inclined surface inclined upward from outside to inside.

[0006] Further, the included angle between the inclined surface and the horizontal plane is 20°.

[0007] Further, the included angle between the two side faces of the screw ridge is 10°.

[0008] Further, the outer diameter of the first end of the sleeve is 47mm, the outer diameter of the second end of the sleeve is 55mm, the length of the sleeve is 100mm, the maximum outer diameter of the extrusion element is 71mm, and the minimum outer diameter of the extrusion element is 56.3mm.

[0009] Further, the number of screw ridges is 5.

[0010] Further, the sleeve is internally provided with internal splines, and the center line of the spline groove is coincident with the center line of the screw ridge.

[0011] The utility model has the advantages that the extrusion element is designed with a conical sleeve and a plurality of spiral screw ridges, so that the material is fully mixed and homogenized during the extrusion process, the mixing effect is further improved, the product density is more uniform, and the product has better physical properties.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a perspective view of the embodiment of the utility model.

[0013] Figure 2 It is a cross section view of the embodiment of the utility model.

[0014] Figure 3 It is a right view of the embodiment of the utility model.

[0015] Figure 4 It is a left view of the embodiment of the utility model.

[0016] 1, sleeve, 2, spiral rib, 3, inclined surface. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only one of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0018] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0019] In the following description, the reference of "one embodiment", "an embodiment", "one example", "an example", and the like indicates that the embodiment or example so described can include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example can not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it can.

[0020] As shown in Figures 1-4 The utility model discloses a novel extrusion element, including sleeve 1 and a plurality of spiral rib 2, sleeve 1 is sleeved on the mandrel, and the cross section of sleeve 1 is conical, and a plurality of spiral rib 2 are annularly and equidistantly arranged on the outer surface of sleeve 1, and the diameter of spiral rib 2 gradually decreases outward along the outer surface of sleeve 1.

[0021] In use, just need to be sleeved to the mixing section corresponding mandrel section of the extrusion element. The outer diameter of one end of sleeve 1 gradually increases to the other end and is conical, so that the material is subjected to gradually changing pressure in the extrusion process. That is, the material will shear and compress when flowing, which helps the mixing and homogenization of the material.

[0022] The plurality of screw edges 2 are arranged at equal intervals in a ring shape on the outer surface of the sleeve 1, which increases the contact area between the material and the sleeve 1, thereby improving the mixing efficiency. The diameter of the screw edge 2 gradually decreases outward along the outer surface of the sleeve 1, that is, the screw edge 2 becomes narrower or sharper outward, which means that the material will be subjected to gradually increasing shear force during the extrusion process, which helps to further refine and mix the material.

[0023] The extrusion element of the utility model can further improve the mixing effect, so that the product density is more uniform and has better physical properties.

[0024] In one embodiment, the first end of the screw edge 2 corresponds to the end of the sleeve 1 with a short outer diameter, and the end face of the first end of the screw edge 2 is an inclined surface 3 that is inclined upward from the outside to the inside. When the screw edge 2 is subjected to pressure, the inclined surface 3 can more effectively disperse the forces and reduce local stress concentration, thereby improving the durability of the entire structure.

[0025] In one embodiment, the angle between the inclined surface 3 and the horizontal plane is 20°. This can meet the needs of installation and connection, and also ensure the stability and durability of the structure.

[0026] In one embodiment, the angle between the two side surfaces of the screw edge 2 is 10°. That is, the side surface of the screw edge 2 is steeper, which helps to generate greater pressure distribution on the mating surface.

[0027] In one embodiment, the outer diameter of the first end of the sleeve 1 is 47mm, and the outer diameter of the second end of the sleeve 1 is 55mm. The length of the sleeve 1 is 100mm, the maximum outer diameter of the extrusion element is 71mm, and the minimum outer diameter of the extrusion element is 56.3mm.

[0028] That is, the proportion of the screw edge 2 on the sleeve 1 is small, achieving the design of multiple small screw edges 2. Multiple screw edges can increase the mixing effect and shear force of the material in the sleeve 1, thereby improving the efficiency and product quality of the extrusion process. The design of small screw edges 2 can reduce the resistance of the material during the extrusion process, while improving the uniformity and dispersion of the material.

[0029] In one embodiment, the number of screw edges 2 is 5.

[0030] In one embodiment, the sleeve 1 is provided with an internal spline inside, which is adapted to the external spline on the mandrel, and the center line of the internal spline tooth groove coincides with the center line of the screw edge 2, facilitating the installation of the extrusion element.

[0031] The design idea of this embodiment is as follows:

[0032] The sleeve 1 is internally provided with internal splines adapted to the external splines on the mandrel, facilitating the installation of the entire extrusion element. The extrusion element is designed with a taper of multiple helical small spirals 2. Multiple helices can increase the mixing effect and shear force of the material in the sleeve 1, thereby improving the efficiency of the extrusion process and the product quality. The design of the small spirals 2 can reduce the resistance of the material during the extrusion process, while improving the uniformity and dispersion of the material. The taper design causes the material to be subjected to gradually changing pressure during the extrusion process, which helps to mix and homogenize the material.

[0033] The extrusion element of the utility model makes the material fully mixed and homogenized during the extrusion process through the design of the tapered sleeve 1 and the multiple helical spirals 2, which can further improve the mixing effect, make the product density more uniform, and have better physical properties.

[0034] The above description of the disclosed embodiments is to enable or use the utility model by the skilled person in the art. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel extruded element characterized in that: The sleeve is sleeved on the mandrel, the cross section of the sleeve is conical, and a plurality of screw ridges are arranged at equal intervals in a ring shape on the outer surface of the sleeve.

2. A novel extruded element according to claim 1, characterized in that: The first end of the screw ridge corresponds to the short end of the outer diameter of the sleeve, and the end face of the first end of the screw ridge is an inclined face that is inclined upward from outside to inside.

3. A novel extruded element according to claim 2, characterized in that: The included angle between the inclined face and the horizontal plane is 20°.

4. A novel extruded element according to claim 2, characterized by: The included angle between the two side faces of the screw ridge is 10°.

5. A novel extruded element according to claim 2, characterized by: The outer diameter of the first end of the sleeve is 47 mm, the outer diameter of the second end of the sleeve is 55 mm, the length of the sleeve is 100 mm, the maximum outer diameter of the extrusion element is 71 mm, and the minimum outer diameter of the extrusion element is 56.3 mm.

6. A novel extruded element according to claim 5, characterized in that: The number of the screw ridges is 5.

7. A novel extruded element according to claim 1 characterized by: An inner spline is arranged in the sleeve, and the center line of the tooth groove of the inner spline coincides with the center line of the screw ridge.

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