Multi-component adhesive twin-screw continuous mixer for medical patches

Abstract

The utility model relates to two screw extrusion equipment technical field, specifically disclose a kind of multi-component glue double screw continuous mixer for medical patch, including driving device, barrel and double screw feeding device, the working end of driving device is equipped with double screw transmission assembly, the barrel is sleeved in the outside of double screw transmission assembly, multiple heating units are equipped in barrel, adjacent two described heating units are detachably connected, single described heating unit is detachably connected in up-down direction, the outside of heating unit is equipped with at least one feed inlet, the discharge outlet of double screw feeding device is connected with the feed inlet. In the scheme, adjacent two heating units are detachably connected, which facilitates cleaning during later medication change. Through this reassembly design mixer, cross-field development of double screw extrusion equipment can be realized, which makes it better applied to the extrusion production of trace materials.

Description

Technical Field

[0001] This utility model relates to the technical field of twin-screw extrusion equipment, and in particular to a twin-screw continuous mixer for multi-component adhesives used in medical patches. Background Technology

[0002] Medical patches are common sheet-like preparations that are applied to the skin to produce systemic or localized effects of medication. Medical patches allow for drug absorption through application to the skin, and via a controlled-release mechanism, the medication can be rapidly and persistently delivered throughout the body at the required dosage to achieve a therapeutic effect. However, this application is not for manufacturing medical patches, but rather for producing the adhesive adhering to the surface of medical patches.

[0003] Different medical patches have different adhesive components depending on the medication used. While current twin-screw extruders can continuously deliver pharmaceutical adhesive, they cannot easily produce multiple components for different medications in a single run, resulting in low production efficiency. Furthermore, due to the different adhesive components in medical patches, using the same twin-screw extruder requires disassembly and cleaning to avoid interference from the medical adhesives. However, current twin-screw extruders use a one-piece discharge heating cylinder, which, due to the inconvenience of cleaning, prevents the direct application of twin-screw extruders in the medical field, thus limiting the development of twin-screw extrusion equipment. Utility Model Content

[0004] The purpose of this invention is to provide a multi-component adhesive twin-screw continuous mixer for medical patches, in order to solve the problems encountered in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A multi-component adhesive twin-screw continuous mixer for medical patches includes a drive unit, a barrel, and a twin-screw feeding device. The working end of the drive unit is equipped with a twin-screw drive assembly. The barrel is fitted around the outside of the twin-screw drive assembly. The barrel contains multiple heating units, with adjacent heating units detachably connected. Individual heating units are detachably connected vertically. Each heating unit has at least one feed inlet on its outer side. The discharge port of the twin-screw feeding device is connected to the feed inlet.

[0006] In the above scheme, the heating unit includes an upper cylinder and a lower cylinder; longitudinal flanges are provided on both sides of the upper cylinder and both sides of the lower cylinder, and two adjacent heating units are detachably connected by bolts through the longitudinal flanges; transverse flanges are provided at the bottom of the upper cylinder and the top of the lower cylinder, and a single heating unit is detachably connected in the vertical direction through bolts through the transverse flanges. As a preferred embodiment, an auxiliary material inlet is provided at the top of the heating unit, and the auxiliary material inlet is located on one side of the top of the upper cylinder.

[0007] In one embodiment, the mixer includes a drive unit, a barrel, and a twin-screw feeding device, as well as a base. The drive unit, barrel, and twin-screw feeding device are all mounted on the top of the base. A conduit box is arranged parallel to the outside of the barrel, and a heating rod is installed inside the heating unit.

[0008] Furthermore, the bottom of the barrel is fixedly connected to the base via a barrel support, and an adjusting screw sleeve is installed between the barrel support and the base.

[0009] In the above scheme, a flipping mechanism is also installed on the base. The working end of the flipping mechanism is used to flip the upper half of the material cylinder as a whole and separate it from the lower half. The flipping mechanism includes a second motor, a rotary table, a flipping shaft, a flipping bracket, and a flipping connecting plate. The second motor is mounted on the base via the rotary table. The working end of the second motor is connected to the flipping shaft via a drive connection. The flipping shaft is mounted on the base via the flipping bracket and is rotatably connected to the flipping bracket via bearings. The outer side of the flipping shaft is fixedly connected to the flipping connecting plate, and the flipping connecting plate is detachably connected to the upper half of the material cylinder.

[0010] As a preferred embodiment, the discharge port of the material cylinder is equipped with a discharge head, and the discharge head has a downward-facing oblique outlet pipe.

[0011] In the above scheme, a protective cover is installed on the outside of the drive device. The drive device includes a first motor and a transmission box mounted on the base. The working end of the first motor is connected to the transmission box through a coupling. The working end of the transmission box passes through the protective cover and is connected to the twin-screw transmission assembly for transmission.

[0012] In the above scheme, a movable platform is installed at the bottom of the base, and the twin-screw feeding device is installed on one side of the base; the twin-screw feeding device includes a third motor, a transmission assembly, a twin-screw extrusion assembly, and a frame. The transmission assembly is installed on the top of the frame, the third motor is installed on one side of the transmission assembly and is connected to the transmission assembly in a driving connection. The transmission assembly is connected to the twin-screw extrusion assembly in a driving connection. A feeding hopper is installed on the top of the twin-screw extrusion assembly, and the discharge port of the twin-screw extrusion assembly is connected to the feed port; a seat is installed at the bottom of the frame, and both the seat and the bottom of the movable platform are equipped with casters with brakes.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the material cylinder is equipped with multiple heating units, each of which is made of medical-grade stainless steel, and the smooth inner cavity facilitates subsequent cleaning; two adjacent heating units can be detachably connected, which facilitates cleaning during subsequent dressing changes; a single heating unit can be detachably connected in the vertical direction, which also facilitates opening the drug inlet chamber for cleaning; the working end of the flipping mechanism is used to flip the upper half of the material cylinder as a whole and separate it from the lower half, thereby facilitating the opening of the material cylinder for cleaning the adhesive inside, preparing for the replacement of new adhesives, and avoiding cross-contamination.

[0014] In addition, the heating unit has at least one feed inlet on its outer side, and the discharge port of the twin-screw feeder is connected to the feed inlet. Multiple feed inlets facilitate the delivery of different component adhesives into the barrel. An auxiliary material inlet is located at the top of the heating unit, on one side of the top of the upper barrel. Depending on the composition of various medical adhesives, appropriate auxiliary materials that improve the breathability and adhesion of the adhesive are added to the auxiliary material in the auxiliary material inlet.

[0015] Therefore, this redesigned mixer can be used for the delivery of multi-component adhesives for medical patches, enabling cross-domain development of twin-screw extruders and making them better suited for the extrusion production of micromaterials. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the installation of the heating unit in this utility model; Figure 5 This is a schematic diagram of the twin-screw feeding device in this utility model; Figure 6 This is a schematic diagram of the overall structure of this utility model.

[0017] Numbering in the diagram: 1-Drive device; 11-First motor; 12-Coupling; 13-Transmission box; 14-Protective cover; 15-Twin-screw drive assembly; 2-Barrel; 21-Heating unit; 211-Upper barrel; 212-Lower barrel; 22-Feed inlet; 23-Conduit box; 24-Auxiliary material inlet; 25-Longitudinal flange; 26-Transverse flange; 27-Screw hole; 28-Barrel support; 29-Height adjustment screw sleeve; 3-Discharge head; 4-Tilting mechanism; 41-Second motor; 42-Rotating table; 43-Tilting shaft; 44-Tilting support; 45-Tilting connecting plate; 5-Base; 51-Moving table; 6-Twin-screw feeding device; 61-Third motor; 62-Transmission assembly; 63-Twin-screw extrusion assembly; 64-Feeding hopper; 65-Frame; 66-Seat. Detailed Implementation

[0018] To make the technical means, creative features, achieved objectives and effects of this utility model easier to understand, the utility model will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model, and therefore only show the relevant components of this utility model.

[0019] Based on the technical solution of this utility model, without changing the essential spirit of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction of the technical solution of this utility model.

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a multi-component adhesive twin-screw continuous mixer for medical patches includes a drive unit 1, a barrel 2, and a twin-screw feeding device 6.

[0022] The working end of the drive unit 1 is equipped with a twin-screw drive assembly 15, which is used to drive the twin-screw drive assembly 15 to rotate and convey the rubber material. The barrel 2 is fitted around the outside of the twin-screw drive assembly 15 for heating and insulation. The barrel 2 contains multiple heating units 21, each made of medical-grade stainless steel with a smooth inner cavity for easy cleaning. Each heating unit 21 is externally fitted with a heating rod or heating plate and connected to the extruder's electrical system for heating and temperature control. For example, by wrapping a resistance wire around the barrel 2, heat is generated and conducted to the inside of the barrel when energized.

[0023] In this design, adjacent heating units 21 are detachably connected for easy cleaning during subsequent medication changes. Individual heating units 21 are also detachably connected vertically to facilitate opening the medication inlet chamber for cleaning. Each heating unit 21 has at least one feed inlet 22 on its outer side, which is detachably connected to the heating unit 21 and sealed to the upper and lower parts of the heating unit 21 with a sealing ring. The outlet of the twin-screw feeding device 6 is connected to the feed inlet 22, allowing for convenient delivery of different component adhesives into the material cylinder 2 through multiple feed inlets 22.

[0024] Please see Figure 4 Each heating unit 21 includes an upper cylinder 211 and a lower cylinder 212. Longitudinal flanges 25 are provided on both sides of the upper cylinder 211 and both sides of the lower cylinder 212. Adjacent heating units 21 are detachably connected via bolts through the longitudinal flanges 25. Transverse flanges 26 are provided at the bottom of the upper cylinder 211 and the top of the lower cylinder 212. Individual heating units 21 are detachably connected vertically via bolts through the transverse flanges 26. Screw holes 27 are provided on both the transverse flanges 26 and the longitudinal flanges 25 for easy bolt tightening. For later cleaning, the cylinder 2 can be opened by removing the bolts.

[0025] As a preferred embodiment, the heating unit 21 has an auxiliary material inlet 24 at its top, located on one side of the top of the upper cylinder 211. Depending on the composition of various medical adhesives, the auxiliary material inlet 24 contains appropriate amounts of materials that improve the breathability and adhesion of the adhesive.

[0026] Example 2, please refer to Figure 1-3 Based on the scheme of Embodiment 1, this twin-screw continuous mixer includes a drive unit 1, a barrel 2, and a twin-screw feeding device 6, as well as a base 5. The base 5 mainly provides support for the drive unit 1 and the barrel 2. The base 5 can be used as an equipment box, with a hollow box structure inside, which facilitates the placement of miscellaneous items or the installation of electrical drive equipment. The drive unit 1, the barrel 2, and the twin-screw feeding device 6 are all installed on the top of the base 5. A conduit box 23 is arranged parallel to the outside of the barrel 2. A heating rod or resistance wire is installed on the outside of the heating unit 21. The wiring of the heating rod or resistance wire is concentrated in the conduit box 23 to prevent the top of the base 5 from being too cluttered.

[0027] Furthermore, the bottom of the material cylinder 2 is fixedly connected to the base 5 via a cylinder support 28, and an adjusting screw sleeve 29 is installed between the cylinder support 28 and the base 5. The adjusting screw sleeve 29 is mainly used to adjust the height between the cylinder support 28 and the base 5 by screwing it, thereby adjusting the height of the material cylinder 2 so that it is parallel to the plane of the base 5, and is properly installed with the twin screw drive assembly 15 at the output port of the drive device 1.

[0028] Example 3, please refer to Figure 1-3 Based on the scheme of embodiment 1, a flipping mechanism 4 is also installed on the base 5. The working end of the flipping mechanism 4 is used to flip the upper half of the material cylinder 2 as a whole and separate it from the lower half, so as to facilitate opening the material cylinder 2 to clean the adhesive inside, prepare for replacing with new different adhesives, and avoid cross-contamination.

[0029] The flipping mechanism 4 includes a second motor 41, a rotary table 42, a flipping shaft 43, a flipping bracket 44, and a flipping connecting plate 45. The second motor 41 is a stepper motor, which is mounted on the base 5 via the rotary table 42. The working end of the second motor 41 is connected to the flipping shaft 43 for transmission. The flipping shaft 43 is mounted on the base 5 via the flipping bracket 44 and is rotatably connected to the flipping bracket 44 via bearings. The outer side of the flipping shaft 43 is fixedly connected to the flipping connecting plate 45, and the flipping connecting plate 45 is detachably connected to the upper part of the material cylinder 2.

[0030] When the second motor 41 is working, it drives the flipping shaft 43 to rotate. When the flipping shaft 43 rotates, it drives the flipping connecting plate 45 to flip, thereby flipping the upper half of the material cylinder 2 over. The upper half of the material cylinder 2 is the entire upper cylinder 211 of the heating unit 21 in Embodiment 1. After only the bolts of the transverse flange 26 are removed, it can be flipped by the second motor 41, which facilitates cleaning the internal cavity of the heating unit 21.

[0031] Example 4, please refer to Figure 1 and Figure 3 Based on the solutions in Examples 1-3, as a preferred embodiment, a discharge head 3 is installed at the discharge port of the barrel 2. The discharge head 3 has a downward-sloping outlet pipe. While the barrel 2 in a twin-screw extruder has a built-in discharge plate, in this embodiment, a separate discharge head 3 is designed. The bottom of the discharge head 3 mates with the discharge port of the barrel 2. The discharge head 3 has a prototype structure with a downward-sloping outlet pipe, facilitating the discharge of the extruded material. A cooling pipe is designed within the discharge head 3's pipe, allowing for easy insertion of coolant for circulating cooling.

[0032] Example 5, please refer to Figure 1 and Figure 3 Based on the schemes of embodiments 1-3, a protective cover 14 is installed on the outside of the drive device 1 to enclose and protect the entire drive device 1. Heat dissipation holes need to be opened at the mounting position of the first motor 1 inside the protective cover 14 to facilitate heat dissipation of the drive device 1.

[0033] In specific implementation, the drive device 1 includes a first motor 11 mounted on the base 5 and a transmission box 13. The first motor 1 is a servo motor, and its working end is connected to the transmission box 13 via a coupling 12. The working end of the transmission box 13 passes through a protective cover 14 and is connected to the twin-screw transmission assembly 15. Driven by the first motor 11, one screw is driven to rotate via the main shaft. Then, a small gear on the outside of this screw acts as the driving gear, driving another small gear on the outside of the other screw as the driven gear, thus forming a transmission motion. In this way, the first motor 11 drives the two screws to rotate synchronously at one time.

[0034] Example 6, please refer to Figure 5 and Figure 6 Based on the schemes of embodiments 1-5, a movable platform 51 is installed at the bottom of the base 5, and a universal wheel with brakes is installed at the bottom of the movable platform 51. The universal wheel facilitates the movement of the mixer to the appropriate position in the medical patch production workshop.

[0035] The twin-screw feeding device 6 is installed on one side of the base 5, located on the outer side of the barrel 2 where the feed inlet 22 is located. The twin-screw feeding device 6 includes a third motor 61, a transmission assembly 62, a twin-screw extrusion assembly 63, and a frame 65. The transmission assembly 62 is installed on top of the frame 65. The third motor 61 is a servo motor, installed on one side of the transmission assembly 62 and connected to it for transmission. The transmission assembly 62 is connected to the twin-screw extrusion assembly 63 for transmission. A feeding hopper 64 is installed on the top of the twin-screw extrusion assembly 63, and the outlet of the twin-screw extrusion assembly 63 is connected to the feed inlet 22.

[0036] The twin-screw feeding device 6 can be considered a type of twin-screw extrusion equipment, albeit with a shorter conveying stroke. In this embodiment, it primarily conveys the adhesive raw material for medical patches into the feed cylinder 2. As a preferred embodiment, a seat 66 is installed at the bottom of the frame 65, and casters with brakes are installed at the bottom of the seat 66 to facilitate moving the twin-screw feeding device 6 to a suitable position on the base 5, and to seal the feed inlet 22 with a sealing ring.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. These undisclosed elements are all prior art known to those skilled in the art.

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A twin-screw continuous mixer for multi-component adhesives used in medical patches, characterized in that: The device includes a drive unit (1), a barrel (2), and a twin-screw feeding device (6). The working end of the drive unit (1) is equipped with a twin-screw drive assembly (15). The barrel (2) is fitted on the outside of the twin-screw drive assembly (15). The barrel (2) is provided with multiple heating units (21). Two adjacent heating units (21) are detachably connected. A single heating unit (21) is detachably connected in the vertical direction. At least one feed inlet (22) is provided on the outside of the heating unit (21). The discharge port of the twin-screw feeding device (6) is connected to the feed inlet (22).

2. The multi-component adhesive twin-screw continuous mixer for medical patches according to claim 1, characterized in that: The heating unit (21) includes an upper cylinder (211) and a lower cylinder (212); longitudinal flanges (25) are provided on both sides of the upper cylinder (211) and both sides of the lower cylinder (212), and two adjacent heating units (21) are detachably connected by bolts through the longitudinal flanges (25); transverse flanges (26) are provided at the bottom of the upper cylinder (211) and the top of the lower cylinder (212), and a single heating unit (21) is detachably connected in the vertical direction through bolts through the transverse flanges (26).

3. The multi-component adhesive twin-screw continuous mixer for medical patches according to claim 2, characterized in that: The heating unit (21) has an auxiliary material inlet (24) at its top, and the auxiliary material inlet (24) is located on one side of the top of the upper cylinder (211).

4. The multi-component adhesive twin-screw continuous mixer for medical patches according to claim 1, characterized in that: It also includes a base (5), the drive device (1), the barrel (2) and the twin screw feeding device (6) are all installed on the top of the base (5), the outer side of the barrel (2) is provided with a wire tube box (23) in parallel, and the heating unit (21) is equipped with a heating rod inside.

5. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 4, characterized in that: The bottom of the material cylinder (2) is fixedly connected to the base (5) through the cylinder support (28), and an adjustment screw sleeve (29) is installed between the cylinder support (28) and the base (5).

6. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 4, characterized in that: The base (5) is also equipped with a flipping mechanism (4), the working end of which is used to flip the upper half of the material cylinder (2) as a whole and separate it from the lower half.

7. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 6, characterized in that: The flipping mechanism (4) includes a second motor (41), a rotary table (42), a flipping shaft (43), a flipping bracket (44), and a flipping connecting plate (45). The second motor (41) is mounted on the base (5) via the rotary table (42). The working end of the second motor (41) is connected to the flipping shaft (43) via a transmission. The flipping shaft (43) is mounted on the base (5) via the flipping bracket (44). The flipping shaft (43) is rotatably connected to the flipping bracket (44) via a bearing. The outer side of the flipping shaft (43) is fixedly connected to the flipping connecting plate (45). The flipping connecting plate (45) is detachably connected to the upper part of the material cylinder (2).

8. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 1, characterized in that: The discharge head (3) is installed at the discharge port of the material cylinder (2), and the discharge head (3) has a downward-sloping outlet pipe.

9. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 4, characterized in that: The drive device (1) is equipped with a protective cover (14) on its outside. The drive device (1) includes a first motor (11) and a transmission box (13) mounted on the base (5). The working end of the first motor (11) is connected to the transmission box (13) through a coupling (12). The working end of the transmission box (13) passes through the protective cover (14) and is connected to the twin screw transmission assembly (15) for transmission.

10. A multi-component adhesive twin-screw continuous mixer for medical patches according to claim 4, characterized in that: A movable platform (51) is installed at the bottom of the base (5), and a twin-screw feeding device (6) is installed on one side of the base (5). The twin-screw feeding device (6) includes a third motor (61), a transmission assembly (62), a twin-screw extrusion assembly (63), and a frame (65). The transmission assembly (62) is installed on the top of the frame (65), and the third motor (61) is installed on one side of the transmission assembly (62) and is connected to the transmission assembly (62) in a transmission connection. The transmission assembly (62) is connected to the twin-screw extrusion assembly (63) in a transmission connection. A feeding hopper (64) is installed on the top of the twin-screw extrusion assembly (63), and the discharge port of the twin-screw extrusion assembly (63) is connected to the feed port (22). A seat (66) is installed at the bottom of the frame (65), and both the seat (66) and the movable platform (51) are equipped with casters with brakes.

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