Extrusion device for thermal forming medical film

Abstract

The utility model relates to the technical field of medical film production equipment, in particular to an extrusion device for a thermal forming medical film. According to the technical scheme, the device comprises a bottom plate, a hopper used for storing materials, a material collecting box and a screw extruder used for conveying and plasticizing are fixedly arranged at the top of the bottom plate, a die head used for forming is fixedly arranged on one side of the screw extruder, and a screening structure used for preventing blocking is arranged in the hopper. The filter plate is pushed upwards by the ejector rod, and after the ejector rod is separated from the filter plate, the filter plate is pushed by the spring to move downwards to generate vibration, so that raw materials at the top of the filter plate can be screened, large-particle raw materials are prevented from entering the extrusion device to block the extrusion device, and the processing efficiency of the equipment is ensured; and the agglomeration phenomenon of the materials can be avoided, the distribution uniformity of various raw material particles can be improved, and the processing quality is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of medical membrane production equipment, and in particular to an extrusion device for thermoformed medical membranes. Background Technology

[0002] Thermoformed medical film is a type of polymer film widely used in the medical field for packaging various medical devices, such as syringes, surgical instruments, orthopedic implants, and pacemakers. It provides protection for the devices, preventing contamination and damage during transportation and storage. At the same time, it has good transparency, making it convenient for medical staff to observe the contents of the package. In the production process of medical film, the extrusion device is one of the key pieces of equipment.

[0003] Because traditional extrusion equipment cannot screen various raw materials during feeding, large particles of raw materials will cause blockages after entering the extrusion equipment, affecting the processing efficiency of the equipment. In view of the above reasons, this application proposes an extrusion device for thermoformed medical films. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an extrusion device for thermoformed medical films.

[0005] The technical solution of this utility model is as follows: an extrusion device for thermoformed medical films, including a base plate, a hopper for storing materials, a collection box and a screw extruder for conveying and plasticizing are fixedly provided on the top of the base plate, a die head for forming is fixedly provided on one side of the screw extruder, a screening structure for anti-clogging is provided in the hopper, and a discharge pipe is provided at the bottom of the hopper.

[0006] The screening structure includes a motor for driving and a filter plate for screening. Two top rods are fixedly sleeved on the outside of the output shaft of the motor. A protective shell for protection is movably mounted on the output shaft of the motor. A stirring rod is movably mounted inside the protective shell. Multiple stirring plates for dispersing materials are fixedly mounted on the outside of the stirring rod.

[0007] Optionally, the screw extruder is externally provided with a discharge pipe, the top of the die head is provided with a feed section, the bottom of the die head is provided with a die lip, and the die lip is provided with an adjustment structure.

[0008] Optionally, the inner wall of the hopper is provided with multiple sliding grooves, and the bottom of the filter plate is fixedly provided with multiple sliders. The sliders and the sliding grooves are movably connected, and the top of each slider is fixedly provided with a spring. The top of the spring is fixedly connected to the top inner wall of the sliding groove.

[0009] Optionally, a bevel gear one is fixedly provided on the output shaft of the motor, the stirring rod is movably connected to the bottom inner wall of the protective shell, and a bevel gear two is fixedly provided at the top of the stirring rod, with the bevel gear one and bevel gear two meshing and transmitting power.

[0010] Optionally, two connecting rods are fixedly provided on the outside of the protective shell, and the ends of the two connecting rods that are far apart are fixedly connected to the inner wall of the hopper. The outside of the protective shell is provided with two through holes, and the bottom of the protective shell is provided with a round hole. Bearings are fixedly provided in the two through holes and the round hole. The inner rings of the three bearings are respectively fixedly sleeved on the output shaft of the motor and the stirring rod.

[0011] Optionally, the adjustment structure includes two pressure plates for adjusting the film thickness and two adjusting screws for driving the pressure plates. Two limiting rods are fixedly provided on the opposite sides of the two pressure plates, and the limiting rods are movably connected to the die lip.

[0012] Optionally, one end of the adjusting screw is rotatably connected to the pressure plate, and the adjusting screw is threadedly connected to the inner wall of the die lip.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] 1. This utility model utilizes a motor, filter plate, top rod, spring, and slider. The top rod pushes the filter plate upwards, and when the top rod separates from the filter plate, the spring pushes the filter plate downwards, generating vibration. This allows for screening of the raw material at the top of the filter plate, preventing large particles from entering the extrusion device and causing blockages, thus ensuring the processing efficiency of the equipment. Furthermore, the addition of a stirring rod and stirring plate allows for stirring of the material during screening, which not only prevents material agglomeration but also improves the uniformity of particle distribution of various raw materials, thereby enhancing processing quality.

[0015] 2. This utility model uses pressure plates and adjusting screws. Before discharge, two adjusting screws can be rotated as needed. The two adjusting screws then drive the two pressure plates to move closer or further away, changing the size of the internal flow channel of the mold lip, thereby achieving precise control of the thickness of the medical film and meeting different production needs. Attached Figure Description

[0016] Figure 1 A first-view perspective three-dimensional structural diagram of the present invention is provided;

[0017] Figure 2 A second-view three-dimensional structural schematic diagram of the present invention is provided;

[0018] Figure 3 A cross-sectional view of the present invention is provided;

[0019] Figure 4A three-dimensional schematic diagram of the screening structure in this utility model is provided;

[0020] Figure 5 A three-dimensional schematic diagram of the screening structure after removing the protective shell is provided in this utility model.

[0021] Figure 6 A three-dimensional schematic diagram of the adjustment structure in this utility model is provided.

[0022] Figure label:

[0023] 1. Base plate;

[0024] 2. Hopper;

[0025] 3. Material collection box;

[0026] 4. Screw extruder;

[0027] 5. Discharge pipe;

[0028] 6. Mold head;

[0029] 7. Feeding section;

[0030] 8. Screening structure; 801. Motor; 802. Filter plate; 803. Sliding block; 804. Spring; 805. Top rod; 806. Bevel gear one; 807. Protective shell; 808. Stirring rod; 809. Bevel gear two; 810. Stirring plate;

[0031] 9. Discharge pipe;

[0032] 10. Molding lip;

[0033] 11. Adjustment structure; 111. Pressure plate; 112. Limiting rod; 113. Adjusting screw. Detailed Implementation

[0034] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0035] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.

[0036] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0037] In the description of this disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0038] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0039] Example 1

[0040] like Figure 1-5 As shown, the present invention proposes an extrusion device for thermoformed medical films, including a base plate 1, a hopper 2 for storing materials, a collection box 3, and a screw extruder 4 for conveying and plasticizing materials fixedly disposed on the top of the base plate 1, a discharge pipe 5 fixedly disposed on the outside of the screw extruder 4, a die head 6 for forming fixedly disposed on one side of the screw extruder 4, a feeding part 7 fixedly disposed on the top of the die head 6, a screening structure 8 for preventing clogging disposed inside the hopper 2, and a discharge pipe 9 disposed at the bottom of the hopper 2.

[0041] The screening structure 8 includes a motor 801 for driving and a filter plate 802 for screening. The inner wall of the hopper 2 is provided with multiple grooves. Multiple sliders 803 are fixedly mounted on the bottom of the filter plate 802, and the sliders 803 are movably connected to the grooves. Springs 804 are fixedly mounted on the top of each slider 803. The springs 804 push the filter plate 802 downwards, causing it to vibrate and achieving the screening function. The top of the springs 804 is fixedly connected to the top inner wall of the grooves. Two push rods 805 are fixedly mounted on the outside of the output shaft of the motor 801. The push rods 805 push the filter plate 802 upwards. A protective shell 807 is movably mounted on the output shaft of the motor 801. A stirring rod 808 is movably mounted inside the protective shell 807. Two connecting rods are fixedly provided on the outside of the 7. The ends of the two connecting rods that are far apart are fixedly connected to the inner wall of the hopper 2. The outer side of the protective shell 807 is provided with two through holes. The bottom of the protective shell 807 is provided with a round hole. Bearings are fixedly provided in the two through holes and the round hole. The inner rings of the three bearings are respectively fixedly sleeved on the output shaft of the motor 801 and the stirring rod 808. A bevel gear 806 is fixedly provided on the output shaft of the motor 801. The stirring rod 808 is movably connected to the bottom inner wall of the protective shell 807. A bevel gear 809 is fixedly provided at the top of the stirring rod 808. The bevel gear 806 and the bevel gear 809 mesh and drive each other. Multiple stirring plates 810 for dispersing materials are fixedly provided on the outside of the stirring rod 808.

[0042] In this embodiment, after various raw materials are introduced into the hopper 2, the motor 801 is started. The output shaft of the motor 801 drives the first bevel gear 806 and the push rod 805. The first bevel gear 806 then drives the second bevel gear 809, which in turn drives the stirring rod 808. The stirring rod 808 then drives multiple stirring plates 810. The push rod 805 pushes the top filter plate 802, causing the filter plate 802 to move upward and drive the slider 803. The slider 803 compresses the top spring 804. When the push rod 805 separates from the filter plate 802, the spring 804 pushes the filter plate 802 downward, generating vibration. Therefore, the filter plate 802 can be vibrated. The material at the top of the filter plate 802 is screened, and large particles are blocked at the top of the aluminum plate 802 and do not participate in the processing. This prevents large particles from entering the extrusion device and causing blockage, ensuring the processing efficiency of the equipment. Multiple stirring plates 810 can stir the material passing through the filter plate 802, which can not only prevent the material from agglomerating, but also improve the uniformity of the distribution of various raw material particles and improve the processing quality. The material enters the collection box 3 through the discharge pipe 9. The screw extruder 4 can guide the material and heat and plasticize it. The plasticized material finally enters the die head 6 and is extruded.

[0043] Example 2

[0044] like Figure 1-6As shown, based on Embodiment 1, a mold lip 10 is fixedly provided at the bottom of the mold head 6. An adjustment structure 11 is provided inside the mold lip 10. The adjustment structure 11 includes two pressure plates 111 for adjusting the thickness of the extruded film and two adjustment screws 113 for driving the pressure plates 111. One end of the adjustment screw 113 is rotatably connected to the pressure plate 111. A guide block is fixedly provided on one side of the pressure plate 111. A bearing is fixedly provided inside the guide block. The inner ring of the bearing is fixedly sleeved on the adjustment screw 113. The adjustment screw 113 is threadedly connected to the inner wall of the mold lip 10. Two limiting rods 112 are fixedly provided on the opposite sides of the two pressure plates 111. The limiting rods 112 are movably connected to the mold lip 10. Before discharge, the two adjustment screws 113 can be rotated as needed. The two adjustment screws 113 then drive the two pressure plates 111 to move closer and further away, changing the size of the internal flow channel of the mold lip 10, thereby achieving precise control of the thickness of the medical film and meeting different production needs.

[0045] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An extrusion device for thermoforming medical film, comprising a base plate (1), a material hopper (2) for storing material, a material collecting box (3) and a screw extruder (4) for conveying and plasticizing fixed on the top of the base plate (1), a die head (6) for forming fixed on one side of the screw extruder (4), characterized in that: a screening structure (8) for preventing blockage is arranged in the material hopper (2), and a discharge pipe (9) is arranged at the bottom of the material hopper (2); the screening structure (8) comprises a motor (801) for driving and a filter plate (802) for screening, two top rods (805) are fixedly sleeved on the output shaft of the motor (801) outside, a protective shell (807) for protection is movably arranged on the output shaft of the motor (801), a stirring rod (808) is movably arranged in the protective shell (807), and a plurality of stirring plates (810) for dispersing material are fixedly arranged on the stirring rod (808) outside.

2. An apparatus for extruding a thermoformable medical film according to claim 1, wherein an outlet pipe (5) is fixedly arranged on the outside of the screw extruder (4), an inlet part (7) is fixedly arranged on the top of the die head (6), a die lip (10) is fixedly arranged at the bottom of the die head (6), and an adjusting structure (11) is arranged in the die lip (10).

3. An apparatus for extruding a thermoformable medical film according to claim 1, wherein a plurality of sliding grooves are arranged on the inner wall of the material hopper (2), a plurality of sliding blocks (803) are fixedly arranged on the bottom of the filter plate (802), the sliding blocks (803) and the sliding grooves are movably connected, springs (804) are fixedly arranged on the top of the sliding blocks (803), and the top ends of the springs (804) are fixedly connected with the top inner wall of the sliding grooves.

4. An apparatus for extruding a thermoformable medical film according to claim 1, wherein a bevel gear one (806) is fixedly arranged on the output shaft of the motor (801), the stirring rod (808) and the bottom inner wall of the protective shell (807) are movably connected, a bevel gear two (809) is fixedly arranged on the top end of the stirring rod (808), and the bevel gear one (806) and the bevel gear two (809) are in meshing transmission.

5. An apparatus for extruding a thermoformable medical film according to claim 1, wherein two connecting rods are fixedly arranged on the outside of the protective shell (807), the distal ends of the two connecting rods are fixedly connected with the inner wall of the material hopper (2), two through holes are arranged on the outside of the protective shell (807), a circular hole is arranged at the bottom of the protective shell (807), bearings are fixedly arranged in the two through holes and the circular hole, and the inner rings of the three bearings are fixedly sleeved on the output shaft of the motor (801) and the stirring rod (808) respectively.

6. An apparatus for extruding a thermoformable medical film according to claim 2, wherein the adjusting structure (11) comprises two pressing plates (111) for adjusting the film thickness and two adjusting screws (113) for driving the pressing plates (111), two limiting rods (112) are fixedly arranged on the side of the two pressing plates (111) away from each other, and the limiting rods (112) are movably connected with the die lip (10).

7. An apparatus for extruding a thermoformable medical film according to claim 6, wherein one end of the adjusting screw (113) is rotatably connected with the pressing plate (111), and the adjusting screw (113) is screwedly connected with the inner wall of the die lip (10).

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