Material density reinforcing assembly

Abstract

The utility model relates to the field of medical instruments, and discloses a material density reinforcing assembly which comprises a main body frame, a mold is arranged on the inner side of the main body frame, a processing cavity used for containing materials is arranged on the inner side of the mold, a vacuum system used for vacuumizing the processing cavity is connected to the main body frame, and the main body frame is connected with a vacuum pump. A pressure applying device for applying pressure to the materials in the processing chamber is arranged on the main body frame; the pressure applying device can apply uniform pressure to the silk fibroin bar in the processing process, and a vacuum system is used for vacuumizing, so that the internal pore structure of the material is closed, the density of the material is increased, and meanwhile, the biocompatibility and biodegradability of the material are kept; the assembly is simple in structure and convenient to operate, and can be used for processing the silk fibroin bar under physical vacuumizing and pressure application, so that the density and the mechanical property of the silk fibroin bar are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, and particularly relates to a material density reinforcing assembly. BACKGROUND

[0002] The silk fibroin rod material is a new type of biomaterial, and the silk fibroin itself has good biocompatibility; after being implanted into the human body, the rod material generally does not cause obvious immune rejection reaction, can be well combined with the surrounding tissue, and provides a good environment for cell adhesion, proliferation and differentiation; in the body environment, the silk fibroin rod material can be gradually degraded into small molecular amino acids, and the degradation products can be absorbed by the human body or discharged out of the body, without causing long-term adverse effects on the human body.

[0003] In the field of orthopedics, the silk fibroin is widely used for manufacturing orthopedic implant materials as a natural high polymer material with excellent biocompatibility and biodegradability; however, the mechanical properties of the traditional silk fibroin rod material cannot meet the needs of orthopedic repair and fixation due to its low density; therefore, it is of great significance to develop a component capable of improving the density of the silk fibroin rod material for improving the performance of the orthopedic implant material. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the defects in the prior art, and provides a material density reinforcing assembly, which can effectively improve the density of the material (silk fibroin rod material) by combining a pressing device and a vacuum system, so as to enhance the mechanical properties, and is particularly suitable for manufacturing orthopedic implant materials.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] A material density reinforcing assembly, comprising a main frame, a mold is arranged on the inner side of the main frame, a processing chamber for accommodating the material is arranged on the inner side of the mold, a vacuum system for vacuumizing the processing chamber is connected to the main frame, and a pressing device for applying pressure to the material in the processing chamber is arranged on the main frame.

[0007] Optionally, an installation chamber for installing the mold is arranged on the inner side of the main frame, and a base for receiving the mold is fixedly connected to the bottom of the main frame.

[0008] Optionally, a demolding groove in communication with the installation chamber is arranged on the top of the main frame, an outwardly protruding boss is arranged on the upper portion of the mold, the bottom surface of the boss is higher than the bottom surface of the demolding groove, and the outer side surface of the boss abuts against the inner side surface of the installation chamber.

[0009] Optionally, the vacuum system comprises a vacuum pump located outside the main frame, a lateral hole is formed in the sidewall of the main frame, the vacuum pump is communicated with the mounting chamber through the lateral hole, and a through hole is formed in the mold for communicating the processing chamber and the mounting chamber.

[0010] Optionally, a sealing door is arranged on the top of the main frame and can be opened and closed relative to the main frame to open and close the mounting chamber.

[0011] Optionally, the pressure applying device comprises a piston located in the mounting chamber, and the piston can move axially into the processing chamber.

[0012] Optionally, the pressure applying device further comprises a screw rod capable of rotating around its axis, the screw rod is screwed through the sealing door, and the lower end of the screw rod is connected with the piston.

[0013] Optionally, one end of the screw rod is rotationally connected with the piston, and the other end of the screw rod extends through the sealing door to the outside of the main frame and is fixedly installed with a handle.

[0014] Optionally, the outer circumferential surface of the piston can be attached to the inner side of the mounting chamber, and a sealing ring is sleeved on the outer circumferential surface of the piston.

[0015] Optionally, the sealing door comprises a cover plate capable of being flipped longitudinally, the main frame is rotationally connected with the cover plate, and the bottom of the cover plate is connected with a positioning protrusion capable of being fitted into the mounting chamber.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] (1) The pressure applying device in the utility model can apply uniform pressure to the silk fibroin rod during processing, and vacuum is extracted by the vacuum system to promote the closure of the internal pore structure of the material and increase the density of the material while maintaining the biocompatibility and biodegradability of the material; the assembly has simple structure and is convenient to operate, and can realize the processing of the silk fibroin rod under physical vacuum and pressure application, thereby effectively improving the density and mechanical properties of the silk fibroin rod.

[0018] (2) In the utility model, the mold is embedded in the inner side of the main frame, the sealing door can be opened and closed longitudinally relative to the main frame, the mold can be replaced according to different rod size requirements, and the application range of the assembly is greatly improved.

[0019] (3) In the utility model, the boss on the upper part of the mold is attached to the inner wall of the mounting chamber, which facilitates the radial positioning of the mold in the main frame and ensures the coaxiality requirement during mold assembly; and the mold can be taken out from the main frame more conveniently through the demolding groove, thereby greatly improving the disassembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the structural schematic view of the material density reinforcing assembly in the embodiment of the utility model, and

[0021] Figure 2 is the structural schematic view of the main body frame in the embodiment of the utility model, and

[0022] Figure 3 is the structural schematic view of the mold in the embodiment of the utility model, and

[0023] Figure 4 is the structural schematic view of the sealing door in the embodiment of the utility model, and

[0024] 1, base; 2, main body frame; 201, installation chamber; 202, demolding groove; 203, transverse hole;

[0025] 3, mold; 301, processing chamber; 302, through hole; 303, boss;

[0026] 4, sealing door; 401, cover plate; 402, positioning boss; 5, piston; 6, screw rod; 7, handle; 8, vacuum pump. DETAILED DESCRIPTION

[0027] The utility model will be further explained in detail in combination with the drawings and embodiments, these drawings are all simplified schematic views, and only the basic structure of the utility model is schematically shown, therefore it only shows the relevant constitution of the utility model.

[0028] As Figures 1-4 shown, a kind of material density reinforcing assembly, including main body frame 2, pressure device and vacuum system, pressure device is arranged on main body frame 2, vacuum system is connected with main body frame 2, and main body frame 2 is used to fix material (herein, silk fibroin rod material), pressure device is used to apply uniform pressure to rod material, and vacuum system is used to vacuum in processing process, to further increase the density of material.

[0029] The inner side of main body frame 2 is provided with installation chamber 201 for installing mold 3, and the bottom of main body frame 2 is fixedly connected with base 1 for receiving mold 3, and the inner side of mold 3 is provided with processing chamber 301 for accommodating material;Main body frame 2 and base 1 are used to fix and support the entire assembly structure, to ensure stability in processing process.

[0030] Pressure device can apply uniform pressure to material in processing chamber 301 in processing process, and vacuum system is used to vacuum processing chamber 301, to promote material internal pore structure to close, increase its density, while maintaining the biocompatibility and biodegradability of material.

[0031] The mold 3 is embedded in the inner side of the main frame 2, the axial length is 0.5-2m, the radial dimension of the processing chamber 301 is 1-5cm, because the mold 3 can be detachably installed in the inner side of the main frame 2, the mold 3 can be replaced according to different bar size requirements, which greatly improves the application range of the assembly;

[0032] Further, the top of the main frame 2 is provided with a demolding groove 202 communicating with the mounting chamber 201, and the upper part of the mold 3 is provided with a boss 303 protruding outward, and the outer side of the boss 303 abuts against the inner side of the mounting chamber 201.

[0033] The boss 303 on the upper part of the mold 3 is in contact with the inner wall of the mounting chamber 201, which facilitates the radial positioning of the mold 3 in the main frame 2, ensures the coaxiality requirement during assembly of the mold 3, and the bottom surface of the boss 303 is higher than the bottom surface of the demolding groove 202, so that the mold 3 can be taken out from the main frame 2 more conveniently through the demolding groove 202, greatly improving the disassembly efficiency.

[0034] When assembling the mold 3, it only needs to be put into the mounting chamber 201 along the axial direction; when taking out the mold 3, only need to use external tools (such as long rod with hook) to stretch into the demolding groove 202, hook the boss 303, and then pull it out along the axial direction.

[0035] In order to facilitate vacuum extraction, it is necessary to ensure the sealing of the mounting chamber 201 and the processing chamber 301, so a sealing door 4 is arranged on the top of the main frame 2, which can be opened and closed relative to the main frame 2 to open or close the mounting chamber 201, and since the mold 3 is located in the mounting chamber 201, when the mounting chamber 201 is in a sealed state, the processing chamber 301 is also in a closed environment.

[0036] The sealing door 4 is used to close the mounting chamber 201 and the processing chamber 301 to ensure that the air pressure in the chamber is stable during vacuum extraction; the sealing door 4 comprises a cover plate 401 and a positioning boss 402 integrally connected, the cover plate 401 is rotatably connected with the main frame 2 and can be opened and closed by longitudinal flipping; the positioning boss 402 is located at the bottom of the cover plate 401, when the edge of the bottom surface of the cover plate 401 abuts against the top surface of the main frame 2, the positioning boss 402 is just fitted and embedded in the mounting chamber 201, that is, the outer circumferential surface of the positioning boss 402 abuts against the inner wall of the embedded mounting chamber 201, so that the positioning can be realized, further ensuring the sealing of the mounting chamber 201.

[0037] The pressing device comprises a piston 5, a screw rod 6 and a handle 7, the screw rod 6 is screwed through the sealing door 4, the upper and lower ends of the screw rod 6 are respectively located at the inner and outer sides of the main frame 2 when the sealing door 4 is closed, and the lower end of the screw rod 6 is connected with the piston 5 and the upper end is connected with the handle 7.

[0038] The handle 7 can drive the screw rod 6 to rotate around the axis of the screw rod 6, and the screw rod 6 is in a screw connection with the sealing door 4, so that the screw rod 6 can convert the rotary motion into linear motion along the axis when rotating, and further drive the piston 5 to realize linear movement along the axis, so that the piston 5 can move into the processing chamber 301 along the axis, and a certain pressure is applied to the material in the processing chamber 301 to enhance the density of the material.

[0039] In order to facilitate the rotation of the screw rod 6, the handle 7 is fixedly installed on the upper end of the screw rod 6, and the piston 5 is rotationally connected with the lower end of the screw rod 6. The screw rod 6 is rotated by rotating the handle 7, and the pressure is transmitted downward through the thread to apply pressure to the silk fibroin in the processing chamber 301.

[0040] The outer circumferential surface of the piston 5 can be attached to the inner side of the installation chamber 201, and a sealing ring is sleeved on the outer circumferential surface of the piston 5. The sealing ring can ensure the sealing of the lower chamber of the piston 5, which is helpful for the vacuum system to vacuumize. When the mold 3 is replaced, the corresponding piston 5 also needs to be replaced to match the size of the inner cavity of the mold 3.

[0041] In addition, the pressure applying device can also use a hydraulic or pneumatic system to apply uniform pressure to the silk fibroin rod.

[0042] The vacuum system includes a vacuum pump 8 located outside the main frame 2, a horizontal hole 203 is formed in the side wall of the main frame 2, the vacuum pump 8 is communicated with the installation chamber 201 through the horizontal hole 203, and the mold 3 is provided with a through hole 302 for communicating the processing chamber 301 and the installation chamber 201.

[0043] The vacuum system in the utility model is vacuumized by physical method, the vacuum pump 8 is responsible for extracting air from the processing chamber 301, and the air pressure in the cavity is reduced, so that the effect of vacuumizing is achieved. The silk fibroin rod is placed in the processing chamber 301, and is isolated from the outside through the sealing door 4. In the processing process, the vacuum pump 8 starts to extract the air in the processing chamber 301, forms a negative pressure environment, and promotes the closure of the pore structure inside the silk fibroin rod, so as to increase the density.

[0044] Due to the existence of the boss 303, there is a certain gap between the outer side of the mold 3 and the inner wall of the installation chamber 201, which facilitates the communication between the installation chamber 201 and the processing chamber 301, and facilitates the vacuumization of the processing chamber 301 by the vacuum pump 8. When the vacuum pump 8 works, the air in the processing chamber 301 is discharged to the installation chamber 201 through the through hole 302, and the air in the installation chamber 201 is discharged to the outside environment along the horizontal hole 203, so as to form a negative pressure environment.

[0045] In order to avoid the material extruding into the through hole 302 when pressurizing, a filter membrane is installed at one end of the through hole 302 close to the processing chamber 301, which is a prior art and only allows small gas molecules to pass through.

[0046] The specific process is as follows:

[0047] Step one, pretreatment of silk fibroin rod: clean and dry the silk fibroin rod to remove impurities and moisture on the surface;

[0048] Step two, fix the silk fibroin rod: fix the pretreated rod in the mold 3 of the main frame 2, ensure that the rod is centered and fixed firmly;

[0049] Step three, vacuumizing: start the vacuum pump 8 to vacuumize the processing chamber 301 until the predetermined negative pressure level is reached;

[0050] Step four, apply pressure: under the condition of maintaining vacuumizing, start the force applying device to apply uniform and gradually increasing pressure to the rod until the predetermined density is reached;

[0051] Step five, keep pressure and vacuum: after reaching the predetermined density, keep the pressure and vacuum state for a period of time to ensure uniform increase of the density of the silk fibroin rod;

[0052] Step six: release pressure and vacuum: after the pressure is kept, gradually release the pressure to zero, and at the same time, close the vacuum pump 8 to gradually restore the air pressure in the processing chamber 301 to the same as the external atmospheric pressure;

[0053] Step seven, take out the rod: after the pressure and vacuum are released, open the sealing door 4 and take out the processed silk fibroin rod.

[0054] Through the above process, the density of the silk fibroin rod can be increased by more than 30%, significantly enhancing its mechanical properties, making it more suitable for use as an orthopedic implant material.

[0055] In summary, the material density strengthening assembly of the utility model can further increase the density of the silk fibroin rod by applying pressure and physical vacuumizing effect of the vacuum system, and at the same time, maintain the biocompatibility and biodegradability of the material.

[0056] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0057] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0058] According to the ideal embodiments of the utility model, the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A material density intensifier assembly, characterized by: The utility model provides a material processing device, which comprises a main frame (2), an inner side of the main frame (2) is provided with a mould (3), an inner side of the mould (3) is provided with a processing chamber (301) for containing material, a vacuum system for vacuumizing the processing chamber (301) is connected to the main frame (2), and a pressure applying device for applying pressure to the material in the processing chamber (301) is arranged on the main frame (2).

2. The material density intensifier assembly of claim 1, wherein: An installation chamber (201) for installing the mould (3) is formed in the inner side of the main frame (2), and a base (1) for receiving the mould (3) is fixedly connected to the bottom of the main frame (2).

3. The material density intensifier assembly of claim 2, wherein: A demoulding groove (202) in communication with the installation chamber (201) is formed in the top of the main frame (2), the upper part of the mould (3) is provided with a boss (303) protruding outward, the bottom surface of the boss (303) is higher than the bottom surface of the demoulding groove (202), and the outer side surface of the boss (303) abuts against the inner side surface of the installation chamber (201).

4. The material density intensifier assembly of claim 3, wherein: The vacuum system comprises a vacuum pump (8) located outside the main frame (2), a transverse hole (203) is formed in the side wall of the main frame (2), the vacuum pump (8) is in communication with the installation chamber (201) through the transverse hole (203), and a through hole (302) for communicating the processing chamber (301) and the installation chamber (201) is formed in the mould (3).

5. The material density intensifier assembly of claim 4, wherein: A sealing door (4) capable of being opened and closed relative to the main frame (2) to open and close the installation chamber (201) is arranged on the top of the main frame (2).

6. The material density intensifier assembly of claim 5, wherein: The pressure applying device comprises a piston (5) located in the installation chamber (201), and the piston (5) can move axially into the processing chamber (301).

7. The material density intensifier assembly of claim 6, wherein: The pressure applying device further comprises a screw rod (6) capable of rotating about its own axis, the screw rod (6) is screwed through the sealing door (4), and the lower end of the screw rod (6) is connected to the piston (5).

8. The material density intensifier assembly of claim 7, wherein: One end of the screw rod (6) is rotationally connected to the piston (5), and the other end of the screw rod (6) extends to the outside of the main frame (2) through the sealing door (4) and is fixedly installed with a handle (7).

9. The material density intensifier assembly of claim 8, wherein: The outer circumferential surface of the piston (5) can abut against the inner side surface of the installation chamber (201), and a sealing ring is sleeved on the outer circumferential surface of the piston (5).

10. The material density intensifier assembly of any of claims 5-8, wherein: The sealing door (4) comprises a cover plate (401) capable of being flipped longitudinally, the main frame (2) is rotationally connected to the cover plate (401), and the bottom of the cover plate (401) is connected with a positioning boss (402) capable of being embedded into the installation chamber (201).

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