A degradable mask nose bridge strip production screw extruder

Abstract

The utility model provides a degradable nose bridge strip production of mask screw extruder, including the support cabinet that is equipped with the extrusion cylinder in top, be equipped with the extrusion screw in the extrusion cylinder, be equipped with the extrusion head in the extrusion cylinder terminal, the one end coaxial detachable installation of extrusion cylinder far away from the extrusion head is in the support pipe seat, support pipe seat top is equipped with feeding device, the first annular seat rotationally installed with in the one end coaxial of support pipe seat far away from the extrusion cylinder, first annular seat is rotated by drive arrangement, the side surface coaxial of support pipe seat far away from the one end of extrusion cylinder is equipped with second annular seat, and the edge of second annular seat is detachably connected with first annular seat side surface, makes second annular seat follow first annular seat rotation. The utility model uses when, because extrusion cylinder, support pipe seat, first annular seat and second annular seat all are coaxial arrangement, when tightening lock nut after, the extrusion screw can be installed in place at this moment.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically a screw extruder for producing biodegradable nose bridge strips for face masks. Background Technology

[0002] The nose bridge strip is a thin adhesive strip inside a mask used to secure it to the bridge of the nose; it's also known as a full-plastic nose bridge strip, nose bridge rib, or nose bridge thread. Currently, biodegradable nose bridge strips mainly refer to mask components made of biodegradable materials such as polylactic acid (PLA). These materials can decompose into carbon dioxide and water under composting conditions, causing no environmental pollution.

[0003] The production of biodegradable nose bridge strips requires extrusion molding using an extruder. Traditional extruders require the extrusion barrel to be connected to a drive unit, and the output shaft of the drive unit must be coaxial with the extrusion barrel; otherwise, eccentric forces will be generated during rotation, causing equipment damage or deformation. Therefore, we propose a screw extruder for the production of biodegradable mask nose bridge strips. Utility Model Content

[0004] This invention provides a screw extruder for producing biodegradable nose bridge strips for face masks, which has the advantage of coaxially installing the extrusion screw in one go, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A screw extruder for producing biodegradable mask nose bridge strips is designed, including a support cabinet with an extrusion cylinder at the top, an extrusion screw inside the extrusion cylinder, an extrusion head at the end of the extrusion cylinder, and a coaxially detachably mounted end of the extrusion cylinder away from the extrusion head on a support tube seat. A feeding device is provided at the top of the support tube seat. A first annular seat is rotatably mounted coaxially at the end of the support tube seat away from the extrusion cylinder. The first annular seat is rotated by a driving device. A second annular seat is coaxially mounted on the side of the end of the support tube seat away from the extrusion cylinder. The edge of the second annular seat is detachably connected to the side of the first annular seat, allowing the second annular seat to rotate with the first annular seat. The end of the extrusion screw away from the extrusion cylinder is placed inside the second annular seat and the two are detachably connected, allowing the extrusion screw to rotate driven by the second annular seat.

[0006] Preferably, the end of the extrusion screw away from the extrusion cylinder is a stepped shaft, and the inner diameter of the second annular seat is smaller than the inner diameter of the support tube seat, so that the stepped end of the extrusion screw is in contact with the inner edge of the second annular seat. At least one keyway is provided on the end of the extrusion screw and the inner ring surface of the second annular seat. A flat key is provided in the two keyways. The end surface of the extrusion screw is provided with an external thread, and a matching lock nut is provided on the external thread. Tightening the lock nut fixes the extrusion screw to the second annular seat or removes it from the second annular seat.

[0007] Preferably, the feeding device includes a hopper, which is installed on top of the feed inlet, and the feed inlet is located on the support tube seat.

[0008] Preferably, a feeder is provided between the hopper and the inlet.

[0009] Preferably, the drive device includes a motor, a gearbox is mounted on the output shaft of the motor, the gearbox and the motor are mounted on a base, and transmission wheels are provided on both the output shaft of the gearbox and the first annular seat, and the two transmission wheels are connected by a transmission belt.

[0010] Preferably, the bottom of the support tube seat is mounted on the top of the support cabinet via at least one first support, the bottom of the extrusion cylinder is provided with at least one second support, the two sides of the second support are provided with strip-shaped openings, the strip-shaped openings are connected to the top of the support cabinet by fasteners, and the extrusion cylinder and the support tube seat are connected by a flange.

[0011] Preferably, multiple heating zones are provided along the length of the extrusion cylinder, each heating zone surface is provided with a heater, and each heating zone is covered with a machine cover, the bottom of the machine cover is mounted on a support cabinet.

[0012] Preferably, each cover is equipped with a cooling fan on its side, and the cooling fan is mounted on the support cabinet.

[0013] Compared with the prior art, in use, the present invention firstly coaxially installs the extrusion cylinder and the support tube seat together, then inserts the extrusion screw into either end of the extrusion cylinder, then places the second annular seat on the end of the extrusion screw, and then installs a locking nut on the end of the extrusion screw, so that the locking nut locks the extrusion screw onto the second annular seat. Since the extrusion cylinder, the support tube seat, the first annular seat and the second annular seat are all coaxially arranged, when the locking nut is tightened, the extrusion screw can be installed in place, that is, the extrusion screw is coaxially located inside the extrusion cylinder, and the extrusion screw can be installed in place in one go. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of one end of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure at the other end of the present invention.

[0017] Figure 3 This is a structural schematic diagram of part of this utility model.

[0018] Figure 4 This is the front view of the present utility model.

[0019] Figure 5 This is a schematic diagram of the extrusion screw of this utility model.

[0020] In the diagram: 1. Motor; 2. Gearbox; 3. First support; 4. Support tube seat; 5. Protective cover; 6. Feed inlet; 7. Feeder; 8. Hopper; 9. Machine cover; 10. Extrusion cylinder; 11. Extrusion head; 12. Control cabinet; 13. Cooling fan; 14. Support cabinet; 15. Second annular seat; 16. Locking nut; 17. Extrusion screw; 18. Drive wheel; 19. Second support; 20. First annular seat; 21. Keyway; 22. Base. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Reference Figures 1 to 5 This utility model provides a technical solution: a screw extruder for producing biodegradable nose bridge strips for face masks, including a support cabinet 14. An extrusion cylinder 10 is mounted on the top of the support cabinet 14, and an extrusion head 11 is provided at the end of the extrusion cylinder 10. The extrusion head 11 is existing technology and has no changes. The end of the extrusion cylinder 10 away from the extrusion head 11 is coaxially and detachably mounted on a support tube seat 4. The two are specifically connected by flanges, that is, the flanges are respectively set at the ends of the extrusion cylinder 10 and the support tube seat 4. During installation, the two flanges are connected by fasteners.

[0023] like Figure 3 As shown, the bottom of the support tube seat 4 is mounted on the top of the support cabinet 14 via at least one first support 3. The first support 3 is approximately T-shaped, and during installation, the bottom of the first support 3 is connected to the support cabinet 14 by fasteners. The bottom of the extrusion cylinder 10 is provided with at least one second support 19, and the two sides of the second support 19 have slots that are connected to the top of the support cabinet 14 by fasteners. When installing the extrusion cylinder 10, the flanges at the ends of the extrusion cylinder 10 and the support tube seat 4 are first installed together. After installation, the extrusion cylinder 10 and the support tube seat 4 are coaxial. Then, they are fastened into the slots with fasteners. This installation method ensures that the extrusion cylinder 10 and the support tube seat 4 are coaxial and free from other stresses.

[0024] The extrusion cylinder 10 is equipped with an extrusion screw 17. In order to allow the extrusion screw 17 to rotate, such as Figure 4As shown, a first annular seat 20 is coaxially rotatably mounted on the end of the support tube seat 4 away from the extrusion cylinder 10. The first annular seat 20 is rotated by a driving device, which includes a motor 1. A gearbox 2 is mounted on the output shaft of the motor 1. The gearbox 2 and the motor 1 are set on a base 22, which is installed on the bottom side of the support cabinet 14. Both the output shaft of the gearbox 2 and the first annular seat 20 are provided with transmission wheels 18. The two transmission wheels 18 are connected by a transmission belt. The transmission wheels 18 are pulleys, synchronous pulleys or sprockets. Correspondingly, the transmission belt is a belt, synchronous belt or transmission chain. Therefore, when the motor 1 rotates, it can drive the first annular seat 20 to rotate.

[0025] For example Figure 4 As shown, a second annular seat 15 is coaxially provided on the side of the support tube seat 4 away from the extrusion cylinder 10. The edge of the second annular seat 15 is detachably connected to the side of the first annular seat 20. That is, the second annular seat 15 and the first annular seat 20 are connected by fasteners, so that the second annular seat 15 can rotate with the first annular seat 20. It should be emphasized that there is a gap between the first annular seat 20 and the end of the support tube seat 4 to avoid contact between the two.

[0026] Continue as Figure 4 As shown, the end of the extrusion screw 17 away from the extrusion barrel 10 is placed inside the second annular seat 15, and the end of the extrusion screw 17 away from the extrusion barrel 10 is a stepped shaft. The inner diameter of the second annular seat 15 is smaller than the inner diameter of the support tube seat 4, so that the stepped end of the extrusion screw 17 is in contact with the inner edge of the second annular seat 15. Another function here is that when the stepped end of the extrusion screw 17 is placed on the second annular seat 15, it can be determined that the extrusion screw 17 has been placed in place.

[0027] At least one keyway 21 is provided at the end of the extrusion screw 17 and on the inner surface of the second annular seat 15. A flat key is provided within each keyway 21, meaning the extrusion screw 17 and the second annular seat 15 are detachably connected. Thus, when the second annular seat 15 rotates with the first annular seat 20, the second annular seat 15 can drive the extrusion screw 17 to rotate; in other words, the extrusion screw 17 is driven to rotate by the second annular seat 15. Figure 5 As shown, the end surface of the extrusion screw 17 is provided with an external thread, and a matching locking nut 16 is provided on the external thread. Therefore, the extrusion screw 17 can be fixed to or removed from the second annular seat 15 by turning the locking nut 16.

[0028] Based on the above embodiments, the specific installation process is as follows: First, install the extrusion cylinder 10, and then coaxially install the extrusion cylinder 10 and the support tube seat 4 together. Then, insert the extrusion screw 17 into any end of the extrusion cylinder 10. After the extrusion screw 17 is roughly positioned, the second annular seat 15 can be fitted onto the end of the extrusion screw 17 and connected to the first annular seat 20. Then, install the locking nut 16 to lock the extrusion screw 17 onto the second annular seat 15. After tightening the locking nut 16, the extrusion screw 17 can be installed in place.

[0029] Since the extrusion cylinder 10, support tube seat 4, first annular seat 20 and second annular seat 15 are all coaxially arranged, the extrusion screw 17 can be coaxial with the extrusion cylinder 10 after installation. When the motor 1 rotates, it can drive the extrusion screw 17 to rotate.

[0030] It is also important to emphasize that the extrusion screw 17 is not directly connected to the motor, thus avoiding the problem of misalignment between the extrusion screw 17 and the motor. When disassembling the extrusion screw 17, it is only necessary to remove the locking nut 16 and the second annular seat 15 in sequence, and then the extrusion screw 17 can be removed. Of course, the extrusion head 11 should also be removed if necessary.

[0031] Furthermore, the top of the support tube 4 is equipped with a feeding device, and the top of the support tube 4 is equipped with a feeding port 6. A feeder 7 is installed on the top of the feeding port 6, and a hopper 8 is installed on the top of the feeder 7. In use, the biodegradable granules are poured into the hopper 8 for storage. The feeder 7 can feed the granules into the support tube 4 at a certain flow rate. As the extrusion screw 17 rotates, the granules move forward along the extrusion cylinder 10 and are finally extruded from the extrusion head 11, thus continuously producing biodegradable nose bridge strips.

[0032] Based on the above embodiments, it should be further explained that in actual production, the extrusion cylinder 10 needs to be heated to a preset temperature. Therefore, multiple heating zones are provided along the length of the extrusion cylinder 10, generally three heating zones. Each heating zone has a heater on its surface, and each heating zone is covered with a cover 9. The bottom of the cover 9 is installed on the support cabinet 14, and the heater heats the extrusion cylinder 10. However, when the extrusion cylinder 10 needs to be cooled, it can be cooled by blowing air through the cooling fan 13. Specifically, a cooling fan 13 is provided on the side of each cover 9. The cooling fan 13 is installed on the support cabinet 14. When the cooling fan 13 blows air, it blows cold air from the outside into the cover 9 and then flows out from the vent on the surface of the cover 9.

[0033] like Figure 1 and Figure 2As shown, a control cabinet 12 is provided on one side of the support cabinet 14. The control cabinet 12 is equipped with a PLC control system. The top of the control cabinet 12 is equipped with a display and a control switch. The PLC control system is electrically connected to the display, control switch, motor 1, feeder 7, cooling fan 13 and heater respectively. In each heating area, there is a temperature monitor electrically connected to the PLC control system. The temperature monitor is used to monitor the temperature in each heating area and keep the temperature of each heating area within a preset range. If a heating jacket is provided on the extruder 11, the heating jacket is also electrically connected to the PLC control system.

[0034] Based on the above embodiments, further optimizations can be made to prevent foreign objects from getting caught inside the transmission belt, such as... Figure 2 As shown, the transmission belt is covered with a protective cover 5, which is connected to the support cabinet 14. The components required for the extruder can be installed inside the support cabinet 14.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw extruder for producing a biodegradable nose bridge strip for face masks, comprising a support cabinet (14) with an extrusion cylinder (10) at the top, an extrusion screw (17) inside the extrusion cylinder (10), and an extrusion head (11) at the end of the extrusion cylinder (10), characterized in that, The end of the extrusion cylinder (10) away from the extrusion head (11) is coaxially and detachably mounted on the support tube seat (4), and the top of the support tube seat (4) is provided with a feeding device; A first annular seat (20) is rotatably mounted on the end of the support tube seat (4) away from the extrusion cylinder (10). The first annular seat (20) is rotated by the driving device. A second annular seat (15) is coaxially provided on the side of the end of the support tube seat (4) away from the extrusion cylinder (10). The edge of the second annular seat (15) is detachably connected to the side of the first annular seat (20), so that the second annular seat (15) rotates with the first annular seat (20). The end of the extrusion screw (17) away from the extrusion cylinder (10) is placed inside the second annular seat (15) and the two are detachably connected, so that the extrusion screw (17) is driven to rotate by the second annular seat (15).

2. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 1, characterized in that, The end of the extrusion screw (17) away from the extrusion barrel (10) is a stepped shaft, and the inner diameter of the second annular seat (15) is smaller than the inner diameter of the support tube seat (4), so that the stepped end of the extrusion screw (17) is in contact with the inner edge of the second annular seat (15). At least one keyway (21) is provided at the end of the extrusion screw (17) and on the inner ring surface of the second annular seat (15), and a flat key is provided in the two keyways (21); The extrusion screw (17) has an external thread on its end surface, and a matching locking nut (16) is provided on the external thread. Tightening the locking nut (16) allows the extrusion screw (17) to be fixed to or removed from the second annular seat (15).

3. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 2, characterized in that, The feeding device includes a hopper (8), which is installed on top of the feed inlet (6), which is located on the support tube seat (4).

4. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 3, characterized in that, A feeder (7) is provided between the hopper (8) and the feed inlet (6).

5. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 2, characterized in that, The drive unit includes a motor (1), a gearbox (2) is mounted on the output shaft of the motor (1), the gearbox (2) and the motor (1) are mounted on a base (22), and a drive wheel (18) is provided on the output shaft of the gearbox (2) and on the first annular seat (20). The two drive wheels (18) are connected by a drive belt.

6. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 4 or 5, characterized in that, The bottom of the support tube seat (4) is mounted on the top of the support cabinet (14) via at least one first support (3); The bottom of the extrusion cylinder (10) is provided with at least one second support (19), and the two sides of the second support (19) are provided with strip-shaped openings, which are connected to the top of the support cabinet (14) by fasteners; and, The extrusion cylinder (10) and the support tube seat (4) are connected by a flange.

7. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 6, characterized in that, Multiple heating zones are provided along the length of the extrusion cylinder (10), each heating zone surface is provided with a heater, and each heating zone is covered with a machine cover (9), the bottom of the machine cover (9) is mounted on the support cabinet (14).

8. The screw extruder for producing biodegradable mask nose bridge strips as described in claim 7, characterized in that, Each cover (9) is equipped with a cooling fan (13) on its side, and the cooling fan (13) is mounted on the support cabinet (14).

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