A twin-screw plastic extruder

Abstract

The utility model discloses a double screw plastic extruder, including base and double screw extruding mechanism, the double screw extruding mechanism installs at the top of base, the material head replacement mechanism is installed to the discharge gate of double screw extruding mechanism, the top of material head replacement mechanism is provided with material head dredging mechanism, the material head replacement mechanism can replace different types of material head for the discharge gate of double screw extruding mechanism according to demand, and the corresponding dredging head is switched to according to the material head of being replaced of material head replacement mechanism, and the extrusion outlet in material head is transported, can prevent the problem that the extrusion outlet is blocked by the cooling solidification of residual molten plastic, thereby avoiding the problem that the material head after replacement can not use normally.

Description

Technical Field

[0001] This utility model relates to the field of plastic extruder technology, specifically a twin-screw plastic extruder. Background Technology

[0002] Twin-screw plastic extruders are a type of mechanical equipment widely used in the plastics processing industry. Their working principle and technical features lie in the process of heating, melting, mixing and extruding plastic granules through the interaction of two screws.

[0003] To ensure working efficiency, existing twin-screw plastic extruders are equipped with a feed head switching device. This device can accommodate extrusions of different sizes and shapes. For example, there is a twin-screw plastic extruder with the publication number CN221112791U. However, after the feed head is switched, the molten plastic remaining inside the feed head cools and solidifies, which can block the extrusion port of the feed head and affect the normal switching and use next time. Utility Model Content

[0004] The purpose of this invention is to provide a twin-screw plastic extruder to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a twin-screw plastic extruder, comprising a base and a twin-screw extrusion mechanism, wherein the twin-screw extrusion mechanism is installed on the top of the base, a material head replacement mechanism is installed at the discharge port of the twin-screw extrusion mechanism, and a material head unblocking mechanism is provided above the material head replacement mechanism.

[0006] Preferably, the feed head replacement mechanism consists of a feed head carrier plate, a translation slide rail, a feed head replacement motor, and an electric push rod. The translation slide rail is fixed to the top of the twin-screw extrusion mechanism near the discharge port. The feed head replacement motor is mounted on the translation slide rail and can slide on the translation slide rail. The electric push rod is fixed to one side of the translation slide rail, and its output end is fixedly connected to the feed head replacement motor. The feed head carrier plate is fixed to the output end of the feed head replacement motor. The feed head carrier plate has multiple feed heads evenly spaced circumferentially, and each feed head has an extrusion port of a different shape.

[0007] Preferably, a dredging mechanism bracket is fixed on the twin-screw extrusion mechanism, and the material head dredging mechanism is fixed on the dredging mechanism bracket. The material head dredging mechanism consists of a dredging head replacement motor, a dredging head electric push rod, a dredging head carrier plate, and dredging heads. One side of the dredging head carrier plate is provided with dredging heads at equal intervals around the circumference, equal to the number of material heads. The shape of each dredging head corresponds to an extrusion port. The other side of the dredging head carrier plate is provided with dredging head electric push rods at equal intervals around the circumference, equal to the number of dredging heads. The dredging heads are fixed on the output end of the dredging head electric push rods, and the dredging head carrier plate is fixed on the output end of the dredging head replacement motor.

[0008] Preferably, a slag discharge mechanism is provided on one side of the material head unblocking mechanism. The slag discharge mechanism consists of a slag discharge chute and a support frame. The support frame is fixed on the base, and the slag discharge chute is inclined and fixed to the top of the support frame.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the material head replacement mechanism of this utility model can replace different types of material heads at the outlet of the twin-screw extrusion mechanism according to the needs. The material head replacement mechanism switches the corresponding unblocking head according to the material head being replaced and conveys the extrusion port in the material head. This can prevent the residual molten plastic from cooling and solidifying and blocking the extrusion port, thereby avoiding the problem that the replaced material head cannot be used normally.

[0010] When replacing the feed head, the feed head replacement mechanism uses a control computer to precisely control the rotation angle of the feed head replacement motor to accurately select the required feed head. During replacement, the electric push rod first pushes the feed head replacement motor to move closer to the discharge port of the twin-screw extrusion mechanism, so that the old feed head is separated from the discharge port of the twin-screw extrusion mechanism. Then, the feed head replacement motor drives the feed head carrier plate to rotate at the corresponding angle. After the rotation is completed, the electric push rod pushes the feed head replacement motor to move further away from the discharge port, so that the new feed head is combined with the discharge port.

[0011] When unclogging the slurry head, the slurry head unclogging mechanism selects the corresponding unclogging head based on the slurry heads recorded by the control computer. After the slurry head moves to the unclogging position of the slurry head unclogging mechanism, it unclogging the slurry head. The replacement of the unclogging head is controlled by the control computer precisely controlling the rotation angle of the unclogging head carrier plate driven by the unclogging head replacement motor. During unclogging, the corresponding unclogging head is first selected, and then the unclogging head is pushed by the unclogging head electric push rod and inserted into the extrusion port of the slurry head to squeeze out the residue in the extrusion port. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the material carrier plate of this utility model;

[0015] Figure 3 This is a schematic diagram of the material head unblocking mechanism of this utility model.

[0016] In the diagram: 1. Base; 2. Control computer; 3. Twin-screw extrusion mechanism; 4. Unblocking mechanism support; 5. Material head unblocking mechanism; 6. Slag discharge mechanism; 7. Slag discharge chute; 8. Support frame; 9. Material head replacement mechanism; 10. Material head carrier plate; 11. Translation slide rail; 12. Material head replacement motor; 13. Electric push rod; 14. Material head; 15. Extrusion port; 16. Unblocking head replacement motor; 17. Unblocking head electric push rod; 18. Unblocking head carrier plate; 19. Unblocking head. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1-3 In this embodiment of the present invention, a twin-screw plastic extruder includes a base 1 and a twin-screw extrusion mechanism 3. The twin-screw extrusion mechanism 3 is installed on the top of the base 1. A feed head replacement mechanism 9 is installed at the discharge port of the twin-screw extrusion mechanism 3. The feed head replacement mechanism 9 can replace different types of feed heads 14 at the discharge port of the twin-screw extrusion mechanism 3 as needed. A feed head unblocking mechanism 5 is provided above the feed head replacement mechanism 9. The feed head unblocking mechanism 5 can unblock the feed heads 14. The feed head replacement mechanism 9 and the feed head unblocking mechanism 5 are controlled and operated by a control computer 2 on the base 1.

[0019] The feed head replacement mechanism 9 consists of a feed head carrier plate 10, a translation slide rail 11, a feed head replacement motor 12, and an electric push rod 13. The translation slide rail 11 is fixed to the top of the twin-screw extrusion mechanism 3 near the discharge port. The feed head replacement motor 12 is mounted on the translation slide rail 11 and can slide on the translation slide rail 11. The electric push rod 13 is fixed to one side of the translation slide rail 11, and the output end of the electric push rod 13 is fixedly connected to the feed head replacement motor 12. The feed head carrier plate 10 is fixed on the output end of the feed head replacement motor 12. The feed head carrier plate 10 has multiple feed heads 14 evenly spaced circumferentially, and each feed head 14 has an extrusion port 15 of a different shape. When the head replacement mechanism 9 replaces the feed head 14, the control computer 2 precisely controls the rotation angle of the head replacement motor 12 to accurately select the required feed head 14. During replacement, the electric push rod 13 first pushes the head replacement motor 12 to move closer to the discharge port of the twin-screw extrusion mechanism 3, so that the old feed head 14 is separated from the discharge port of the twin-screw extrusion mechanism 3. Then, the head replacement motor 12 drives the head carrier plate 10 to rotate at the corresponding angle. After the rotation is completed, the electric push rod 13 pushes the head replacement motor 12 to move further away from the discharge port, so that the new feed head 14 is combined with the discharge port.

[0020] A dredging mechanism bracket 4 is fixed on the twin-screw extrusion mechanism 3. The material head dredging mechanism 5 is fixed on the dredging mechanism bracket 4. The material head dredging mechanism 5 consists of a dredging head replacement motor 16, a dredging head electric push rod 17, a dredging head carrier plate 18, and dredging heads 19. The dredging head carrier plate 18 has dredging heads 19 of equal number to the material heads 14 at equal intervals around its circumference. The shape of each dredging head 19 corresponds to an extrusion port 15. The dredging head carrier plate 18 has dredging head electric push rods 17 of equal number to the dredging heads 19 at equal intervals around its circumference. The dredging heads 19 are fixed on the output end of the dredging head electric push rods 17. The dredging head carrier plate 18 is fixed on the output end of the dredging head replacement motor 16.

[0021] A slag discharge mechanism 6 is provided on one side of the material head unblocking mechanism 5. The slag discharge mechanism 6 consists of a slag discharge chute 7 and a support frame 8. The support frame 8 is fixed on the base 1. The slag discharge chute 7 is inclined and fixed to the top of the support frame 8. The slag discharge mechanism 6 can lead out the unblocked residue from the device.

[0022] The working principle of this utility model is as follows: The feed head replacement mechanism 9 of this utility model can replace different types of feed heads 14 at the outlet of the twin-screw extrusion mechanism 3 according to the requirements. The feed head replacement mechanism 9 switches the corresponding unblocking head 19 according to the feed head 14 being replaced, and conveys the extrusion port 15 in the feed head 14. This can prevent the residual molten plastic from cooling and solidifying and blocking the extrusion port 15, thereby avoiding the problem that the replaced feed head 14 cannot be used normally.

[0023] When the feed head replacement mechanism 9 replaces the feed head 14, the control computer 2 precisely controls the rotation angle of the feed head replacement motor 12 to accurately select the required feed head 14. During replacement, the electric push rod 13 first pushes the feed head replacement motor 12 to move closer to the discharge port of the twin-screw extrusion mechanism 3, so that the old feed head 14 is separated from the discharge port of the twin-screw extrusion mechanism 3. Then, the feed head replacement motor 12 drives the feed head carrier plate 10 to rotate at the corresponding angle. After the rotation is completed, the electric push rod 13 pushes the feed head replacement motor 12 to move away from the discharge port, so that the new feed head 14 is combined with the discharge port.

[0024] When the material head unblocking mechanism 5 unblocks the material head 14, it selects the corresponding unblocking head 19 according to the material head 14 used by the control computer 2. After the material head 14 moves to the unblocking position of the material head unblocking mechanism 5, the material head 14 is unblocked. The replacement of the unblocking head 19 is controlled by the control computer 2 by precisely controlling the rotation angle of the unblocking head replacement motor 16 driving the unblocking head carrier plate 18. When unblocking, the corresponding unblocking head 19 is selected first. Then the unblocking head 19 is pushed by the unblocking head electric push rod 17 and inserted into the extrusion port 15 of the material head 14 to squeeze out the residue in the extrusion port 15.

[0025] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A twin-screw plastic extruder comprising a base (1) and a twin-screw extruder mechanism (3), characterized in that: The twin-screw extrusion mechanism (3) is installed on the top of the base (1). A material head replacement mechanism (9) is installed at the outlet of the twin-screw extrusion mechanism (3). A material head unblocking mechanism (5) is provided above the material head replacement mechanism (9).

2. A twin screw plastic extruder according to claim 1, characterized in that: The feed head replacement mechanism (9) consists of a feed head carrier plate (10), a translation slide rail (11), a feed head replacement motor (12), and an electric push rod (13). The translation slide rail (11) is fixed on the top of the twin-screw extrusion mechanism (3) near the discharge port. The feed head replacement motor (12) is mounted on the translation slide rail (11) and can slide on the translation slide rail (11). The electric push rod (13) is fixed on one side of the translation slide rail (11) and the output end of the electric push rod (13) is fixedly connected to the feed head replacement motor (12). The feed head carrier plate (10) is fixed on the output end of the feed head replacement motor (12). The feed head carrier plate (10) has multiple feed heads (14) evenly spaced around its circumference, and each feed head (14) has an extrusion port (15) of a different shape.

3. A twin-screw plastic extruder according to claim 2, characterized in that: The twin-screw extrusion mechanism (3) is fixed with a dredging mechanism bracket (4), and the material head dredging mechanism (5) is fixed on the dredging mechanism bracket (4). The material head dredging mechanism (5) consists of a dredging head replacement motor (16), a dredging head electric push rod (17), a dredging head carrier plate (18), and a dredging head (19). The dredging head carrier plate (18) has dredging heads (19) of the same number as the material head (14) at equal intervals on one side of its circumference. The shape of each dredging head (19) corresponds to an extrusion port (15). The dredging head carrier plate (18) has dredging head electric push rods (17) of the same number as the dredging heads (19) installed at equal intervals on the other side of its circumference. The dredging head (19) is fixed on the output end of the dredging head electric push rod (17), and the dredging head carrier plate (18) is fixed on the output end of the dredging head replacement motor (16).

4. A twin-screw plastic extruder according to claim 1, characterized in that: The material head unblocking mechanism (5) is provided with a slag discharge mechanism (6) on one side. The slag discharge mechanism (6) consists of a slag discharge chute (7) and a support frame (8). The support frame (8) is fixed on the base (1). The slag discharge chute (7) is inclined and fixed to the top of the support frame (8).

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