An extrusion apparatus for precise temperature control in the production of thermoplastic elastomers

Abstract

This utility model relates to the field of extrusion device technology, specifically to a precise temperature-controlled thermoplastic elastomer production extrusion device, including an extruder body with a feed inlet and a discharge channel. An outer cover is fixedly connected to the discharge channel. The outer cover contains a screening component for screening for metal foreign objects in the material. The screening component includes a receiving box located inside the outer cover, with a movable frame slidably connected to the receiving box. This utility model uses the screening component to allow material from the feed hopper to enter the receiving box. A motor-driven metal detector then screens and checks the material in the receiving box for metal foreign objects. If no foreign objects are found, a cam divider rotates the receiving box, discharging the material into the extruder body. If foreign objects are found, a drive component pushes the outer cover, separating the discharge channel from the feed inlet, thus facilitating the discharge of material containing foreign objects.

Description

Technical Field

[0001] This utility model relates to the field of extrusion equipment technology, and in particular to an extrusion device for producing thermoplastic elastomers with precise temperature control. Background Technology

[0002] Extruders are used in the production of thermoplastic elastomers. Their function is to plasticize the material and extrude the molten material continuously and uniformly under constant pressure and quantity. Extruders usually adopt zoned temperature control technology, such as dividing the barrel into multiple independent heating sections, each of which can be adjusted individually. Combined with heat exchangers, cooling fans or solenoid valves, they can achieve rapid dynamic response and avoid local overheating or overcooling, thereby achieving precise temperature control.

[0003] In most existing extruders, materials are directly fed into the hopper during use, resulting in poor material screening and control. The extruders themselves do not have material screening functions, leading to the contamination of metal foreign objects. These metal foreign objects mostly come from raw material packaging residues (staples, wires, metal tags) and recycled materials (iron filings from crusher wear, screws left over from old equipment). Furthermore, data shows that 65% of screw jamming accidents caused by metal foreign objects occur in the feeding section, which can easily lead to significant property damage. Therefore, it is necessary to conduct metal checks during material feeding to avoid this risk.

[0004] To address this, a precise temperature-controlled thermoplastic elastomer production extrusion device is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a precise temperature-controlled thermoplastic elastomer production extrusion device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a precise temperature-controlled thermoplastic elastomer production extrusion device, comprising an extruder body, an inlet on the extruder body, a discharge channel on the inlet, and an outer cover fixedly connected to the discharge channel; the outer cover contains a screening component for screening for metal foreign objects in the material, the screening component including a receiving box disposed in the inner cavity of the outer cover, a movable frame slidably connected to the receiving box, a metal detector fixedly installed on the movable frame, and an mounting plate fixedly connected to the movable frame, the mounting plate containing a toggle plate for generating material flow.

[0007] Preferably, a feeding hopper is fixedly connected to the outer cover, and an automatic switch for material discharge is fixedly installed on the feeding hopper.

[0008] Preferably, a round rod is rotatably connected to the outer cover, and the round rod is fixedly connected to the receiving box. A circular ring is slidably connected to the round rod, and the circular ring is fixedly connected to the movable frame.

[0009] Preferably, a movable plate is rotatably connected to the ring, a threaded rod is rotatably connected to the round rod and threadedly connected to the movable plate, a guide rod is fixedly installed in the round rod and slidably connected to the movable plate, and a motor is fixedly installed on the outer cover and the output shaft of the motor is fixedly connected to the threaded rod.

[0010] Preferably, the round rod has a sliding groove, and the movable frame is slidably connected in the sliding groove.

[0011] Preferably, a cam divider is fixedly installed on the outer cover, and the cam divider is fixedly connected to the round rod.

[0012] Preferably, a push block is fixedly connected to the actuating plate, and a baffle is fixedly installed in the receiving box. The baffle is provided with a plurality of protrusions, and the protrusions and the push block are provided with matching inclined surfaces.

[0013] Preferably, a limiting rod is fixedly connected to the mounting plate, and the limiting rod is slidably connected to the actuating plate. A spring is fixedly connected between the actuating plate and the mounting plate.

[0014] The beneficial effects of this utility model are:

[0015] This invention uses a screening component to ensure that after the material in the feed hopper enters the receiving box, a metal detector driven by a motor screens and checks the material in the receiving box to detect whether it contains any metal foreign objects. If no foreign objects are found, the material box rotates under the action of the cam divider and pours the material into the extruder body. If foreign objects are found, the drive component pushes the outer cover to separate the discharge channel from the feed port, thereby facilitating the discharge of material containing foreign objects and preventing metal foreign objects from entering the extruder body and damaging the equipment.

[0016] This invention, through the setting of the actuating plate, enables the actuating plate to move left and right in the receiving box when the moving frame drives the actuating plate to move in the receiving box. With the cooperation of the pushing block and the protrusion on the baffle, the actuating plate can move left and right in the receiving box, thereby enhancing the flow of materials in the receiving box. As the materials move, the relative position of any metal foreign objects that may be present in the material box with the metal detector changes continuously, generating periodic disturbance signals, making them easier to distinguish and detect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a precision temperature-controlled thermoplastic elastomer production extrusion device according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the outer casing structure of a thermoplastic elastomer production extrusion device with precise temperature control, according to an embodiment of this utility model.

[0020] Figure 3 This is a schematic diagram of the receiving box structure of a precision temperature-controlled thermoplastic elastomer production extrusion device according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the receiving box of a precision temperature-controlled thermoplastic elastomer production extrusion device according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the moving frame structure of a precision temperature-controlled thermoplastic elastomer production extrusion device according to an embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view of the moving frame of a thermoplastic elastomer production extrusion device with precise temperature control, according to an embodiment of this utility model.

[0024] The components in the diagram are labeled as follows: 1. Extruder body; 2. Feed inlet; 3. Discharge channel; 4. Outer cover; 5. Receiving box; 6. Moving frame; 7. Metal detector; 8. Mounting plate; 9. Actuating plate; 10. Feed hopper; 11. Automatic switch; 12. Round rod; 13. Ring; 14. Moving plate; 15. Threaded rod; 16. Guide rod; 17. Motor; 18. Slide groove; 19. Cam divider; 20. Push block; 21. Baffle; 22. Limiting rod; 23. Spring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0026] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figures 1 to 6 As shown in the figure, a specific embodiment of this utility model provides a precise temperature-controlled thermoplastic elastomer production extrusion device, including an extruder body 1, an inlet 2 on the extruder body 1, a discharge channel 3 on the inlet 2, and an outer cover 4 fixedly connected to the discharge channel 3; the outer cover 4 is provided with a screening component for screening materials for metal foreign objects. By setting the screening component, the materials about to enter the extruder body 1 can be screened and screened to determine whether the materials contain metal foreign objects. If metal foreign objects are found, the materials are prevented from entering the extruder body 1 in time, thereby preventing serious damage to the equipment and avoiding property loss. The screening component includes a receiving box 5 located in the inner cavity of the outer cover 4, a movable frame 6 slidably connected to the receiving box 5, and a metal detector 7 fixedly installed on the movable frame 6. The metal detectors 7 are all self-powered, so there is no need to consider the power supply wiring during subsequent rotation. A mounting plate 8 is fixedly connected to the movable frame 6, and a toggle plate 9 for generating material flow is provided in the mounting plate 8.

[0028] like Figures 1 to 6As shown, specifically, a feed hopper 10 is fixedly connected to the outer cover 4, and an automatic switch 11 for material discharge is fixedly installed on the feed hopper 10. When the extruder body 1 is working, the operator pours the material into the feed hopper 10, and the automatic switch 11 controls the material in the feed hopper 10 to gradually slide down and be discharged into the leftmost receiving box 5. A round rod 12 is rotatably connected to the outer cover 4, and the round rod 12 is fixedly connected to the receiving box 5. A ring 13 is slidably connected to the round rod 12, and the ring 13 is fixedly connected to the moving frame 6. A moving plate 14 is rotatably connected to the ring 13. A threaded rod 15 is rotatably connected to the round rod 12, and the threaded rod 15 is threadedly connected to the moving plate 14. A guide rod 16 is fixedly installed in the round rod 12, and the guide rod 16 is rotatably connected to the moving plate 14. The rod 16 is slidably connected to the moving plate 14. The motor 17 is fixedly installed on the outer cover 4, and the output shaft of the motor 17 is fixedly connected to the threaded rod 15. The round rod 12 has a sliding groove 18, and the moving frame 6 is slidably connected in the sliding groove 18. After the material is placed in the receiving box 5, the motor 17 is started at the same time to drive the threaded rod 15 to rotate. Thus, through the cooperation of the guide rod 16, the moving plate 14 moves along the guide rod 16. The movement of the moving plate 14 drives the ring 13 to move in the round rod 12, thereby driving the moving frame 6 to move gradually. The movement of the moving frame 6 drives the metal detector 7 to move gradually at the top of the receiving box 5. Thus, the metal detector 7 checks and screens the material in the receiving box 5, thereby determining whether it contains metal foreign objects.

[0029] A push block 20 is fixedly connected to the actuating plate 9. A baffle 21 is fixedly installed in the receiving box 5. The baffle 21 has several protrusions, and the protrusions and the push block 20 have matching inclined surfaces. A limit rod 22 is fixedly connected to the mounting plate 8, and the limit rod 22 is slidably connected in the actuating plate 9. A spring 23 is fixedly connected between the actuating plate 9 and the mounting plate 8. At the same time, while the moving frame 6 moves the metal detector 7 to perform inspection, the moving frame 6 moves the actuating plate 9 in the receiving box 5. The movement of the actuating plate 9 moves the push block 20, so that the push block 20 gradually approaches the protrusion on the baffle 21 and applies pressure to the protrusion. Because the protrusion and the push block 20 are provided with matching inclined surfaces, the push block 20 pushes the actuating plate 9 to move on the limiting rod 22 under the action of the protrusion. The actuating plate 9 causes the spring 23 to contract and generate a reaction force. After the moving frame 6 drives the actuating plate 9 to gradually move, causing the push block 20 to disengage from the protrusion on the baffle 21, the actuating plate 9 gradually moves back to its original position under the reaction force of the spring 23. Therefore, during the movement of the moving frame 6 driving the actuating plate 9, under the action of the several protrusions on the push block 20 and the baffle 21, the actuating plate 9 gradually moves left and right, thereby enabling the actuating plate 9 to move more efficiently during material collection. As the moving frame 6 moves along with the material in the receiving box 5, it pushes the material in the receiving box 5 in both the left and right directions, thereby enhancing the flow of the material in the receiving box 5 and preventing the material entering the receiving box 5 from the feed hopper 10 from accumulating. While the material is being inspected by the metal detector 7, the material has better flow and moves under the action of the actuating plate 9. As the material moves, the relative position of any metal foreign objects that may be present in the receiving box 5 with the metal detector 7 changes continuously, generating periodic disturbance signals that are easier to distinguish and detect.

[0030] like Figures 1 to 6As shown, specifically, a cam divider 19 is fixedly installed on the outer cover 4, and the cam divider 19 is fixedly connected to the round rod 12. After the motor 17 drives the moving frame 6 to move back and forth on the receiving box 5, the metal inspection of the material in the receiving box 5 can be completed. After no metal foreign objects are found, the cam divider 19 is started to drive the round rod 12 to rotate, thereby driving the moving frame 6, which is slidably connected in the slide groove 18, to rotate. This causes the ring 13 connected to the moving frame 6 to rotate on the moving plate 14. The receiving box 5 on the far left, after being inspected, rotates 90 degrees together with the cam divider 19. The receiving box 5, which was originally at the bottom, moves to the bottom of the feeding hopper 10 in the outer cover 4 after rotating. Under the action of the automatic switch 11, the material in the feeding hopper 10 flows downward and is discharged into the receiving box 5. At this time, the working principle is the same as described above. The motor 17 is started again to drive the moving frame 6 to move and screen the material in the receiving box 5. After the screening is completed, the cam divider 19 rotates again. The material is discharged from the receiving box 5 at a 90-degree angle and screened repeatedly. As the cam divider 19 rotates, the material in the receiving box 5 tilts downwards, causing the material falling into the outer cover 4 to gradually slide into the discharge channel 3 and finally enter the extruder body 1 for use. When a metal foreign object is detected in the receiving box 5, the metal detector 7 sends a signal immediately, thereby driving the drive component on the extruder body 1 to push the outer cover 4, which in turn moves the outer cover 4 to separate the bottom discharge channel 3 from the feed port 2. This allows the material in the receiving box 5 to be discharged and collected through the discharge channel 3 under the rotation of the cam divider 19. The collected material can then be screened by the staff to find the metal foreign object. The drive component is existing technology and will not be described in detail. After the material in the receiving box 5 is discharged, the drive component resets the outer cover 4. The above steps are repeated to continue the screening and material conveying process in the extruder body 1.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, 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 precision temperature-controlled thermoplastic elastomer production extrusion apparatus, comprising an extruder body (1), wherein the extruder body (1) is provided with a feed inlet (2), the feed inlet (2) is provided with a discharge channel (3), and an outer cover (4) is fixedly connected to the discharge channel (3), characterized in that: The outer cover (4) is provided with a screening component for screening metal foreign objects in the material. The screening component includes a receiving box (5) located in the inner cavity of the outer cover (4). A movable frame (6) is slidably connected to the receiving box (5). A metal detector (7) is fixedly installed on the movable frame (6). An installation plate (8) is fixedly connected to the movable frame (6). An actuating plate (9) for generating material flow is provided in the installation plate (8).

2. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 1, characterized in that, The outer cover (4) is fixedly connected to a feeding hopper (10), and the feeding hopper (10) is fixedly installed with an automatic switch (11) for material discharge.

3. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 1, characterized in that, A round rod (12) is rotatably connected in the outer cover (4), and the round rod (12) is fixedly connected to the receiving box (5). A ring (13) is slidably connected in the round rod (12), and the ring (13) is fixedly connected to the moving frame (6).

4. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 3, characterized in that, A movable plate (14) is rotatably connected in the ring (13), a threaded rod (15) is rotatably connected in the round rod (12), and the threaded rod (15) is threadedly connected to the movable plate (14). A guide rod (16) is fixedly installed in the round rod (12), and the guide rod (16) is slidably connected to the movable plate (14). A motor (17) is fixedly installed on the outer cover (4), and the output shaft of the motor (17) is fixedly connected to the threaded rod (15).

5. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 3, characterized in that, The round rod (12) has a groove (18) and the movable frame (6) is slidably connected in the groove (18).

6. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 1, characterized in that, A cam divider (19) is fixedly installed on the outer cover (4), and the cam divider (19) is fixedly connected to the round rod (12).

7. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 1, characterized in that, A push block (20) is fixedly connected to the actuating plate (9), and a baffle (21) is fixedly installed in the receiving box (5). The baffle (21) is provided with several protrusions, and the protrusions and the push block (20) are provided with matching inclined surfaces.

8. The thermoplastic elastomer production extrusion apparatus with precise temperature control according to claim 1, characterized in that, A limiting rod (22) is fixedly connected in the mounting plate (8), and the limiting rod (22) is slidably connected in the actuating plate (9). A spring (23) is fixedly connected between the actuating plate (9) and the mounting plate (8).

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