A screw extruder

Abstract

The utility model relates to extruder technical field especially relates to a spiral extruder. A spiral extruder, including base, transmission case and extrusion cylinder a etc. are fixedly connected with transmission case at the top rear side of base, the right side fixedly connected with extrusion cylinder a at transmission case front part, two extrusion cylinder b are fixedly connected with extrusion cylinder a front end in proper order, and the front end of front side extrusion cylinder b is rotatably connected with end cover, and the left side installation of base top has motor, and the output shaft end of motor is connected with the left part of transmission case. The utility model motor drives screw rod to push raw material, and the electric hot plate makes it melt, and cooling assembly can be introduced into extrusion cylinder thread hole cooling through water pump when raw material temperature is too high, namely avoids raw material overheating degradation, guarantees extrusion product quality, reduces flaw and performance fluctuation, can prevent material cylinder, screw rod and other components from high temperature accelerated wear and tear aging again, prolongs its life, reduces maintenance cost, guarantees production process high efficiency stable.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, and in particular to a screw extruder. Background Technology

[0002] Screw extruders are indispensable key equipment in the plastics and rubber industries. Their core function is to cleverly use the rotation of the screw to achieve efficient extrusion and deep plasticization of materials, and to precisely extrude the materials into a pre-set ideal shape, laying a solid foundation for the production of various plastic and rubber products.

[0003] In the actual operation of an extruder, the problem of raw material overheating cannot be ignored. Once the raw material temperature exceeds the reasonable range, it is very easy to cause material degradation. This will not only seriously damage the physical and chemical properties of the material, resulting in a significant reduction in the quality of the extruded product, with problems such as surface defects and unstable performance; it will also cause core components such as the barrel and screw to overheat due to prolonged exposure to high-temperature environments, accelerating component wear and aging, significantly shortening their service life, increasing equipment maintenance costs and downtime, and ultimately affecting the efficiency and stability of the entire production process. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a screw extruder.

[0005] The technical implementation scheme of this utility model is as follows: a screw extruder includes a base, a transmission box, an extrusion cylinder a, an extrusion cylinder b, an end cap, a motor, a feeding hopper, and a cooling assembly. The transmission box is fixedly connected to the rear side of the top of the base. The extrusion cylinder a is fixedly connected to the right side of the front part of the transmission box. Two extrusion cylinders b are fixedly connected to the front end of the extrusion cylinder a in sequence. The front end of the front extrusion cylinder b is rotatably connected to an end cap. The motor is installed on the left side of the top of the base. The end of the output shaft of the motor is connected to the left side of the transmission box. The feeding hopper is fixedly connected to the top of the extrusion cylinder a. A cooling assembly is provided on the base, the extrusion cylinder a, and the extrusion cylinder b. The cooling assembly is used to cool and reduce the temperature of the raw material in the extrusion cylinder a or the extrusion cylinder b.

[0006] Furthermore, the cooling assembly includes a water supply pipe, a water pump, a connecting pipe, and a drain pipe. Threaded holes are provided on the walls of extrusion cylinders a and b. A water supply pipe is connected to the bottom front side of extrusion cylinder a and the two extrusion cylinders b. Three water pumps are installed at intervals on the top rear side of the base's bottom panel. The three water supply pipes pass through the top panel of the base and are connected to the three water pumps respectively. A connecting pipe is connected to the top of each of the three water pumps. The ends of the three connecting pipes away from the water pumps pass through the rear panel of the base. A drain pipe is connected to the bottom rear side of extrusion cylinder a and the two extrusion cylinders b. The three drain pipes pass through the top panel and the rear panel of the base in sequence.

[0007] Furthermore, it also includes columns and limiting rings. Two columns are fixedly connected to the top of the base at intervals, and limiting rings are fixedly connected to both columns. The two limiting rings are respectively sleeved on the outer walls of extrusion cylinder a and front extrusion cylinder b.

[0008] Furthermore, it also includes a support and a bracket. The support is fixedly connected to the rear top of the base, and the bracket is fixedly connected to the top of the support. The left side of the bracket is fixedly connected to the feeding hopper.

[0009] Furthermore, it also includes lifting rings, with symmetrical lifting rings fixedly connected to the top center of the base and the top of the transmission box also symmetrically connected to the top.

[0010] Furthermore, it also includes heat dissipation mesh plates, with multiple heat dissipation mesh plates spaced apart on the side panels of the base.

[0011] This invention has the following advantages: The motor drives the screw to push the raw material, the heating plate melts it, and the cooling component can introduce water into the threaded hole of the extruder barrel to cool it down when the raw material temperature is too high. This avoids the degradation of the raw material due to overheating, ensures the quality of the extruded product, reduces defects and performance fluctuations, and prevents the barrel, screw and other components from being worn and aged due to high temperature, thus extending their lifespan, reducing maintenance costs, and ensuring a high-efficiency and stable production process. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a three-dimensional structural diagram of the water supply pipe and water pump of this utility model.

[0014] Figure 3 This is a three-dimensional structural diagram of the support and bracket of this utility model.

[0015] In the attached diagrams: 1: base, 2: transmission box, 21: extrusion cylinder a, 22: extrusion cylinder b, 23: end cap, 24: motor, 25: feed hopper, 31: threaded hole, 32: water supply pipe, 33: water pump, 34: connecting pipe, 35: drain pipe, 41: column, 42: limit ring, 51: support, 52: bracket, 6: lifting ring, 7: heat dissipation mesh plate. Detailed Implementation

[0016] References to embodiments herein mean that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] Example: A screw extruder, such as Figures 1-3 As shown, the system includes a base 1, a transmission box 2, an extrusion cylinder a21, an extrusion cylinder b22, an end cap 23, a motor 24, a feeding hopper 25, and a cooling assembly. The base 1 is a hollow shell. The transmission box 2 is bolted to the rear top of the base 1. The extrusion cylinder a21 is bolted to the right front of the transmission box 2. Two extrusion cylinders b22 are bolted to the front end of the extrusion cylinder a21. Electric heating modules for heating the raw materials are embedded in the inner walls of both the extrusion cylinder a21 and the extrusion cylinder b22. The end cap 23 is rotatably connected to the front end of the front extrusion cylinder b22. The motor is mounted on the left side of the top of the base 1. 24. The output shaft end of the motor 24 is connected to the left side of the transmission box 2. An extrusion screw is provided in both the extrusion cylinder b22 and the extrusion cylinder a21. The rear end of the extrusion screw is connected to the transmission box. The motor drives the extrusion screw to rotate through the transmission box to extrude the raw material (the extrusion screw is prior art and is not specifically shown in the figure). The feed hopper 25 is fixed to the top of the extrusion cylinder a21 by bolts. A cooling assembly is provided on the base 1, the extrusion cylinder a21, and the extrusion cylinder b22. The cooling assembly is used to cool and reduce the temperature of the raw material in the extrusion cylinder a21 or the extrusion cylinder b22.

[0018] like Figure 2 As shown, the cooling assembly includes a water supply pipe 32, a water pump 33, a connecting pipe 34, and a drain pipe 35. Threaded holes 31 are provided on the walls of both extrusion cylinders a21 and b22. The water supply pipe 32 is connected to the front bottom of both extrusion cylinders a21 and b22. Three water pumps 33 are spaced apart on the rear top of the bottom panel of the base 1. All three water supply pipes 32 penetrate the top panel of the base 1 and are connected to the three water pumps 33 respectively. The connecting pipe 34 is connected to the top of each of the three water pumps 33. The ends of the connecting pipes 34 away from the water pump 33 all penetrate the rear panel of the base 1. The bottom rear sides of the extrusion cylinder a21 and the two extrusion cylinders b22 are all connected to the drain pipes 35. The three drain pipes 35 all penetrate the top panel and the rear panel of the base 1 in sequence. The threaded hole 31 is wound around the cylinder wall of the extrusion cylinder a21 or the extrusion cylinder b22 in the form of a spring wire. The openings of the threaded hole 31 are located on the front and rear sides of the bottom of the extrusion cylinder a21 or the extrusion cylinder b22, respectively, and are connected to the adjacent water supply pipe 32 and drain pipe 35, respectively.

[0019] In use, the feeding hopper 25 supplies raw materials to the extrusion cylinder a21. Then, the motor 24 drives the extrusion screw to rotate via the transmission box 2. The extrusion screw then pushes the raw material forward along the extrusion cylinder a21 and the two extrusion cylinders b22. The electric heating modules installed on the inner walls of the extrusion cylinder a21 and the two extrusion cylinders b22 then heat the raw material, melting it. When the raw material temperature is high, the water pump 33 is activated. The water pump 33 draws external water from the connection pipe 34 into the water supply pipe 32, and then through the water supply pipe 32, the water pump 33 is inserted into the threaded hole 31 on the wall of the extrusion cylinder a21 or the extrusion cylinder b22, thereby cooling the raw material and preventing it from becoming too hot.

[0020] like Figure 3 As shown, it also includes a column 41 and a limiting ring 42. The top of the base 1 is fixed with two columns 41 at intervals by bolts. The limiting ring 42 is fixed to each of the two columns 41 by welding. The two limiting rings 42 are respectively sleeved on the outer wall of the extrusion cylinder a21 and the front extrusion cylinder b22.

[0021] The column 41 and the limiting ring 42 are used to support the extrusion cylinder a21 and the front extrusion cylinder b22, thereby improving stability.

[0022] like Figure 3 As shown, it also includes a support 51 and a bracket 52. The support 51 is fixed to the rear top of the base 1 by bolts, and the bracket 52 is welded to the top of the support 51. The left side of the bracket 52 is fixedly connected to the feeding hopper 25.

[0023] By setting the support 51 and the bracket 52, the feeding hopper 25 is provided with auxiliary support to prevent it from tipping over.

[0024] like Figure 1 and Figure 3 As shown, it also includes a lifting ring 6. The lifting ring 6 is symmetrically welded and fixed to the top center of the base 1, and the lifting ring 6 is also symmetrically fixed to the top of the transmission box 2.

[0025] By setting up the lifting ring 6, workers are prevented from lifting and moving the entire extruder.

[0026] like Figure 3 As shown, it also includes a heat dissipation mesh plate 7, and multiple heat dissipation mesh plates 7 are arranged at intervals on the side plate of the base 1 by bolts.

[0027] By setting the heat dissipation mesh plate 7, it is beneficial to the air circulation inside the base 1, which facilitates the heat dissipation of the water pump 33 and the drain pipe 35.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A screw extruder, characterized in that: The device includes a base (1), a transmission box (2), an extrusion cylinder a (21), an extrusion cylinder b (22), an end cap (23), a motor (24), a feed hopper (25), and a cooling assembly. The transmission box (2) is fixedly connected to the rear top of the base (1). The extrusion cylinder a (21) is fixedly connected to the right front of the transmission box (2). Two extrusion cylinders b (22) are fixedly connected to the front end of the extrusion cylinder a (21). The end cap (23) is rotatably connected to the front end of the front extrusion cylinder b (22). The motor (24) is installed on the left top of the base (1). The output shaft end of the motor (24) is connected to the left side of the transmission box (2). The feed hopper (25) is fixedly connected to the top of the extrusion cylinder a (21). A cooling assembly is provided on the base (1), the extrusion cylinder a (21), and the extrusion cylinder b (22). The cooling assembly is used to cool and reduce the temperature of the raw material in the extrusion cylinder a (21) or the extrusion cylinder b (22).

2. A screw extruder according to claim 1, characterized in that: The cooling assembly includes a water supply pipe (32), a water pump (33), a connecting pipe (34), and a drain pipe (35). Threaded holes (31) are provided on the walls of extrusion cylinder a (21) and extrusion cylinder b (22). Water supply pipes (32) are connected to the bottom front side of extrusion cylinder a (21) and the two extrusion cylinders b (22). Three water pumps (33) are installed at intervals on the top rear side of the bottom panel of the base (1). The three water supply pipes (32) pass through the top panel of the base (1) and are connected to the three water pumps (33) respectively. The top of the three water pumps (33) is connected to a connecting pipe (34). The ends of the three connecting pipes (34) away from the water pumps (33) pass through the rear panel of the base (1). Drain pipes (35) are connected to the bottom rear side of extrusion cylinder a (21) and the two extrusion cylinders b (22). The three drain pipes (35) pass through the top panel and the rear panel of the base (1) in sequence.

3. A screw extruder according to claim 2, characterized in that: It also includes columns (41) and limiting rings (42). The top of the base (1) is fixedly connected to two columns (41) at intervals. Each column (41) is fixedly connected to a limiting ring (42). The two limiting rings (42) are respectively sleeved on the outer walls of the extrusion cylinder a (21) and the front extrusion cylinder b (22).

4. A screw extruder according to claim 3, characterized in that: It also includes a support (51) and a bracket (52). The support (51) is fixedly connected to the rear top of the base (1), and the bracket (52) is fixedly connected to the top of the support (51). The left side of the bracket (52) is fixedly connected to the feeding hopper (25).

5. A screw extruder according to claim 4, characterized in that: It also includes a lifting ring (6), a lifting ring (6) is fixedly connected symmetrically on the left and right sides of the top center of the base (1), and a lifting ring (6) is also fixedly connected symmetrically on the left and right sides of the top of the transmission box (2).

6. A screw extruder according to claim 5, characterized in that: It also includes a heat dissipation mesh plate (7), and multiple heat dissipation mesh plates (7) are spaced apart on the side plate of the base (1).

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