extruder

Abstract

The application discloses an extruder, which comprises a cylinder, a screw, a driving part and a heater. The screw is rotatably arranged in the cylinder and a spiral material channel is formed between the screw and the cylinder. The driving part is connected with the screw and used for driving the screw to rotate. The heater is arranged at least one and sleeved on the cylinder. The end surface of the heater and the cross section perpendicular to the screw axis have a certain angle. The extruder can improve the heating efficiency of the material.

Description

Technical Field

[0001] This invention relates to the field of plastics manufacturing, and in particular to an extruder. Background Technology

[0002] In related technologies, screw extruders rely on the pressure and shear force generated by the rotating screw to fully plasticize and uniformly mix materials, which are then shaped through a die. They are widely used in the production of films, sheets, pipes, and profiles, as well as in special processing operations such as lamination, mixing, granulation, and chemical reactions. However, heat transfer losses during the plastic molding process result in low heating efficiency and high energy consumption in extrusion molding machines on the market. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes an extruder that can improve the heating efficiency of materials.

[0004] An extruder according to a first aspect of the present invention includes: a barrel, a screw, a drive member, and a heater; the screw is rotatably disposed through the barrel and forms a helical feed groove between the screw and the barrel; the drive member is connected to the screw and is used to drive the screw to rotate; at least one heater is provided and is sleeved outside the barrel, the end face of the heater having a certain angle with a section perpendicular to the screw axis.

[0005] The extruder according to embodiments of the present invention has at least the following beneficial effects: the extruder includes a barrel, a screw, a drive unit, and a heater. The screw of the extruder is rotatably connected to the barrel under the drive of the drive unit. The heater is sleeved outside the barrel. The material between the screw and the barrel can be melted and mixed under the high temperature of the heater, and extruded along the spiral feed groove between the screw and the barrel. Since the end faces of the heater at both ends have an angle with the cross section perpendicular to the screw axis, the end faces of the heater can interfere with the screw thread. Thus, the end faces of the heater can not only generate temperature interference on the material in the axial direction, but also on the material in the direction perpendicular to the axial direction, thereby reducing energy consumption and improving heating efficiency.

[0006] According to some embodiments of the present invention, the heater is in the shape of an oblique cylinder.

[0007] According to some embodiments of the present invention, the heater is an electromagnetic induction heater.

[0008] According to some embodiments of the present invention, the extruder further includes a flow guide, which is disposed along the inner circumferential surface of the heater and sleeved outside the barrel. A water-cooling channel is formed between the heater and the flow guide, and the heater is provided with a water inlet and a water outlet for connecting the water-cooling channel and an external water-cooling circulation device.

[0009] According to some embodiments of the present invention, a spiral baffle is provided between the outer periphery of the flow guide and the heater so that the water cooling channel is spiral in shape.

[0010] According to some embodiments of the present invention, the extruder further includes a housing, which is fitted over the heater and has an inlet and an outlet for connecting the heater wires to an external power source and for connecting the water cooling channel to an external water cooling circulation device.

[0011] According to some embodiments of the present invention, the extruder further includes a constant temperature sensor controller, which is electrically connected to the heater and the water cooling circulation device respectively.

[0012] According to some embodiments of the present invention, the extruder further includes a phase change heat storage material disposed between the barrel and the heater.

[0013] According to some embodiments of the present invention, the phase change heat storage material and the barrel are provided with a positioning structure, which is disposed between the phase change heat storage material and the barrel to fix the phase change heat storage material and the barrel.

[0014] According to some embodiments of the present invention, the extruder further includes a flange assembly, a plurality of heaters are provided, the screw and the barrel pass through the flange assembly and the plurality of heaters, and the flange assembly is connected between adjacent heaters.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the extruder according to one embodiment of the present invention after the drive component has been removed;

[0018] Figure 2 This is a schematic diagram of the extruder according to another embodiment of the present invention after the drive component has been removed;

[0019] Figure 3 for Figure 2The diagram shown is a structural schematic of the extruder after removing the drive unit, housing, and temperature sensor controller.

[0020] Figure 4 This is a front view of a cylindrical heater and screw in the prior art;

[0021] Figure 5 for Figure 2 The front view of the heater and screw shown;

[0022] Figure 6 for Figure 3 Left view of the heater and flow guide shown;

[0023] Figure 7 for Figure 6 A cross-sectional view AA of the heater and flow guide described herein;

[0024] Figure 8 for Figure 3 The exploded view of the barrel and phase change heat storage material shown.

[0025] Figure label:

[0026] 100 barrel; 110 flat key; 120 receiving tank; 200 screw; 300 heater; 310 water inlet; 320 drain outlet; 400 phase change heat storage material; 410 keyway; 500 flow guide; 510 spiral baffle; 600 outer shell; 610 inlet; 620 outlet; 700 constant temperature induction controller; 800 flange assembly. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 limiting this invention.

[0029] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The following is for reference. Figures 1 to 8 An extruder according to an embodiment of the present invention is described.

[0033] like Figures 1 to 5 As shown, the extruder according to an embodiment of the present invention includes: a barrel 100, a screw 200, and a drive component (not shown in the figure).

[0034] (shown) and heater 300; screw 200 is rotatably inserted through barrel 100 and forms a spiral feed groove between it and barrel 100; drive member is connected to screw 200 and is used to drive screw 200 to rotate; at least one heater 300 is provided and sleeved outside barrel 100, the end face of heater 300 has a certain angle with the cross section perpendicular to the axis of screw 200.

[0035] Understandably, this extruder includes a barrel 100, a screw 200, a drive unit, and a heater 300. The screw 200 of the extruder is rotatably connected inside the barrel 100 under the drive of the drive unit. The heater 300 is sleeved outside the barrel 100. The material between the screw 200 and the barrel 100 can be melted and mixed under the high temperature of the heater 300, and extruded along the spiral feed channel between the screw 200 and the barrel 100. Since the end faces of the heater 300 at both ends have an angle with the cross section perpendicular to the axis of the screw 200, the end faces of the heater 300 can interfere with the threads of the screw 200. Thus, the end faces of the heater 300 can not only generate temperature interference on the material in the axial direction, but also in the direction perpendicular to the axial direction, thereby reducing energy consumption and improving heating efficiency.

[0036] Specifically, see as Figure 4 and Figure 5 , Figure 4 The screw 200 and cylindrical heater 300 are common in the prior art, and the end face of the cylindrical heater 300 is perpendicular to the axis of the screw 200; Figure 5 In one embodiment of the present invention, a screw 200 and an inclined cylindrical heater 300 are used, wherein the end face of the inclined cylindrical heater 300 is at an angle to the axis of the screw 200. Figure 4 In the process, the direction of material flow along the feed chute of the screw 200 is A. A can be considered as including the component α that needs to be heated along the axial direction to the right and the component β that needs to be heated perpendicular to the axial direction downwards. The end face of the cylindrical heater 300 is perpendicular to the axial direction of the screw 200, so the generated heat B is perpendicular to the end face of the cylindrical heater 300. B can perform temperature interference on the axial component α, but cannot perform temperature interference on the perpendicular axial component β, thus failing to produce high heating efficiency. Figure 5 In one embodiment of the present invention, the material flows in the direction A along the feed chute of the screw 200. A can be considered to include a component α that needs to be heated along the axial direction to the right and a component β that needs to be heated perpendicular to the axial direction downwards. The heat B generated by the end face of the inclined cylindrical heater 300 can be divided into a component γ that is axially to the left and a component θ that is perpendicular to the axial direction upwards. The left component γ can cause temperature interference with the component α that is axially to the right, and the upward component θ can cause temperature interference with the downward component β, thereby generating higher heating efficiency. Therefore, in the present invention, the end face of the heater 300 has an oblique angle with the axis of the screw 200, thereby enabling the extruder to have higher heating efficiency.

[0037] It is understandable that the heater 300 is in the shape of an oblique cylinder. For example, as... Figures 3 to 4As shown, in this embodiment, the heater 300 is an oblique cylindrical shape, and the end face of the oblique cylindrical heater 300 is at an oblique angle to the axis of the screw 200, thereby making the heater 300 have higher heating efficiency for the screw 200.

[0038] It should be understood that, in addition to being cylindrical in this embodiment, the heater 300 can also be rectangular in shape in other embodiments. As long as the end face of the heater 300 is at an angle to the axis of the screw 200, the heating efficiency of the heater 300 on the screw 200 can be improved.

[0039] It is understood that heater 300 is an electromagnetic induction heater 300. For example, as Figure 3 As shown, in this embodiment, the heater 300 is an electromagnetic induction heater 300, which has higher heating efficiency, reduces energy consumption, and improves energy utilization compared to an electric heater 300.

[0040] It should be understood that in some other embodiments, the heater 300 may also be an electric heater 300.

[0041] It is understood that the extruder also includes a guide member 500, which is arranged along the inner circumferential surface of the heater 300 and sleeved outside the barrel 100. A water-cooling channel is formed between the heater 300 and the guide member 500. The heater 300 is provided with a water inlet 310 and a water outlet 320 for connecting the water-cooling channel and an external water-cooling circulation device. For example, as Figures 6 to 7 As shown, in this embodiment, a guide member 500 is provided inside the heater 300, and the guide member 500 is sleeved outside the barrel 100. A water cooling channel is formed between the heater 300 and the guide member 500. The heater 300 is provided with a water inlet 310 and a drain outlet 320. When the heating temperature of the heater 300 is too high, the external water cooling circulation device can inject cold water into the water cooling channel through the water inlet 310. The cold water flows in the water cooling channel, which cools the material in the barrel 100 and discharges the heated water from the drain outlet 320 into the water cooling circulation device.

[0042] Understandably, a spiral baffle is provided between the outer periphery of the guide member 500 and the heater 300 to make the water cooling channel spiral. For example, as Figures 6 to 7 As shown, in this embodiment, the outer periphery of the flow guide 500 is provided with a spiral baffle 510, so that the water cooling channel formed between the flow guide 500 and the heater 300 is spiral-shaped, thereby enabling more uniform cooling.

[0043] Understandably, the extruder also includes a housing 600, which is fitted over the heater 300 and has an inlet 610 and an outlet 620 for connecting the heater 300's electrical wiring to an external power source and for connecting the water-cooling channel to an external water-cooling circulation device. For example, as Figures 1 to 2 As shown, in this embodiment, the extruder also includes a housing 600. The housing 600 not only provides protection for the heater 300 to prevent burns from contact with personnel, but also provides heat preservation for the heater 300. Meanwhile, the hose of the water cooling circulation device can be connected to the water inlet 310 through the inlet 610 and to the drain outlet 320 through the outlet 620.

[0044] Understandably, the extruder also includes a temperature control sensor 700, which is electrically connected to the heater 300 and the water-cooling circulation device. For example, as Figures 1 to 2 As shown, in this embodiment, the extruder also includes a constant temperature sensor controller 700. The constant temperature sensor controller 700 senses the temperature of the heater 300 to ensure that the material in the barrel 100 is kept within the required temperature range. If the temperature sensed by the constant temperature sensor controller 700 is too high, it controls the water cooling circulation device to cool the barrel 100 with water, thereby enabling adaptive temperature control.

[0045] Understandably, the extruder also includes a phase change heat storage material 400, which is disposed between the barrel 100 and the heater 300. For example, as... Figures 1 to 3 , Figure 8 As shown, in this embodiment, the extruder also includes a phase change heat storage material 400. The phase change heat storage material 400 can store heat itself while the heater 300 heats the material in the barrel 100. When the heater 300 stops heating, the phase change heat storage material 400 can release heat, thereby achieving the effect of heat storage and insulation for the material in the barrel 100.

[0046] It should be understood that when a water-cooling channel is provided, if the temperature inside the barrel 100 is too high, the water-cooling circulation device will be used for water cooling first. After a certain temperature is reached, the water cooling will be stopped, and then the phase change heat storage material 400 can continue to absorb heat and cool the material, so as to achieve a more precise temperature control effect.

[0047] It is understood that the phase change heat storage material 400 and the barrel 100 are provided with a positioning structure, which is located between the phase change heat storage material 400 and the barrel 100 to fix the phase change heat storage material 400 and the barrel 100. For example, as Figure 8 As shown, in this embodiment, a positioning structure is provided between the phase change heat storage material 400 and the barrel 100 so that the phase change heat storage material 400 is connected to the barrel 100.

[0048] Specifically, in this embodiment, a flat key 110 is provided on the outer periphery of the barrel 100, and a corresponding keyway 410 is provided on the phase change heat storage material 400. The keyway 410 and the flat key 110 match, thereby enabling the phase change heat storage material 400 to be positioned and fixed on the barrel 100. In some other embodiments, a groove can also be provided on the outer periphery of the barrel 100, and a protrusion can be provided on the phase change heat storage material 400. The protrusion and the groove match, thereby also enabling the phase change heat storage material 400 to be positioned and fixed on the barrel 100.

[0049] It should be understood that the positioning structure also includes a groove on the outer periphery of the barrel 100, through which the phase change heat storage material 400 is embedded in the barrel 100, and the flat key 110 is disposed in the groove.

[0050] Understandably, the extruder also includes a flange assembly 800, multiple heaters 300, and a screw 200 and barrel 100 passing through the flange assembly 800 and the multiple heaters 300. The flange assembly 800 connects adjacent heaters 300. For example, as Figure 1 As shown, in this embodiment, the extruder also includes a flange assembly 800, multiple heaters 300 are provided, and adjacent heaters 300 are connected through the flange assembly 800, so that the barrel 100 can be controlled at different temperatures in different sections through different heaters 300.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. Extruder, characterized in that The extruder comprises: a barrel (100); a screw (200) rotatably arranged in the barrel (100) and forming a spiral channel with the barrel (100); a driving member connected to the screw (200) and used for driving the screw (200) to rotate; at least one heater (300) arranged outside the barrel (100) and having an inclined cylindrical shape, and the end surface of the heater (300) has a certain angle with the cross section perpendicular to the axis of the screw (200).

2. The extruder of claim 1, wherein The heater (300) is an electromagnetic induction heater (300).

3. The extruder of claim 1, wherein The extruder further comprises a flow guide member (500) arranged along the inner circumferential surface of the heater (300) and sleeved outside the barrel (100), and a water cooling channel is formed between the heater (300) and the flow guide member (500), and the heater (300) is provided with a water inlet (310) and a water outlet (320) for connecting the water cooling channel with an external water cooling circulating device.

4. The extruder of claim 3, wherein A spiral partition is arranged between the outer circumferential surface of the flow guide member (500) and the heater (300) to make the water cooling channel spiral.

5. The extruder according to any one of claims 3-4, characterized in that The extruder further comprises a shell (600) sleeved on the heater (300) and provided with an inlet (610) and an outlet (620) for connecting the heater (300) with an external power supply and connecting the water cooling channel with an external water cooling circulating device.

6. The extruder according to any one of claims 3-4, characterized in that The extruder further comprises a constant temperature induction controller (700) electrically connected with the heater (300) and the water cooling circulating device.

7. The extruder according to any one of claims 1 to 4, characterized in that The extruder further comprises a phase change heat storage material (400) arranged between the barrel (100) and the heater (300).

8. The extruder of claim 7, wherein The phase change heat storage material (400) and the barrel (100) are provided with a positioning structure arranged between the phase change heat storage material (400) and the barrel (100) to fix the phase change heat storage material (400) and the barrel (100).

9. The extruder of any one of claims 1-4, wherein, The extruder further comprises a flange assembly (800), and the heater (300) is provided with a plurality of the screw (200) and the barrel (100) arranged in the flange assembly (800) and the plurality of the heater (300), and the flange assembly (800) is connected between adjacent heaters (300).

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