A bone cement mold that can be quickly demolded

Abstract

The utility model discloses a bone cement mould which can be demoulded quickly, comprising a bone cement bead upper mould and a bone cement bead lower mould which are in upper and lower position cooperation and constitute a mould assembly, a steel wire clamping groove is arranged in the middle of the assembly surface formed by the bone cement bead upper mould and the bone cement bead lower mould, the two ends of the steel wire clamping groove penetrate through the two sides of the mould assembly, the front surface of the mould assembly is provided with a bone cement pouring groove, a plurality of shunt guide grooves are arranged on the back groove wall of the bone cement pouring groove, a bone cement bead forming groove is arranged on the back groove of the shunt guide groove, the bone cement bead forming grooves are arranged in a straight line and are communicated with the steel wire clamping groove. The utility model lowers the temperature of the surface of the solidified bone cement bead by the low-temperature water flow flowing in the cooling flow groove, so that the surface of the bone cement bead shrinks and is separated from the groove wall of the bone cement bead forming groove, the bone cement bead can be demoulded conveniently, the difficulty of demoulding is reduced without pulling by the steel wire, and the use convenience of the overall device is improved.

Description

Technical Field

[0001] This utility model relates to the field of bone cement mold technology, and in particular to a bone cement mold that can be quickly demolded. Background Technology

[0002] In existing technologies, bone cement is a common name for bone cementing agents, a medical material used in orthopedic surgery. Bone cement is frequently used in orthopedic surgery to fill cavities in the bone, utilizing medications mixed within it to repair and fight bacteria. Antibiotic-enhanced bone cement beads are primarily used to prevent and treat postoperative infections in orthopedic surgeries, playing a particularly important role in the treatment of osteomyelitis.

[0003] Antibiotic bone cement beads are made by combining antibiotics with bone cement. This special medical material can continuously release antibiotics locally. When used after orthopedic surgery, especially in cases of infection risk or where infection has already occurred, antibiotic bone cement beads can fill damaged areas, providing support and stability, while simultaneously releasing high concentrations of antibiotics locally to kill or inhibit bacteria, effectively controlling infection.

[0004] A search revealed a Chinese patent application with patent number 202320050954.8, which discloses a bone cement mold that can be quickly demolded, including a first template and a second template. The first template and the second template are provided with a wire fixing mechanism. The wire fixing mechanism includes a fixing plate fixedly installed on the left and right surfaces of the first template, and the upper surface of the fixing plate is provided with a fixing groove.

[0005] The above-mentioned patent has the following shortcomings: In the process of demolding the antibiotic bone cement beads, the bone cement mold mainly pulls the bone cement beads out of the mold by pulling with steel wire. The steel wire is relatively thin, and the connection between the bone cement beads and the mold is relatively tight. Direct pulling can easily cause the bone cement beads to break. In addition, the steel wire is relatively thin, which is not conducive to the hand to exert force and can easily cause hand injury. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bone cement mold that allows for rapid demolding.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A bone cement mold with rapid demolding capability includes an upper mold and a lower mold for bone cement beads that fit together to form a mold assembly. A wire groove is formed in the middle of the assembly surface formed by the upper and lower molds. Both ends of the wire groove penetrate both sides of the mold assembly. A bone cement injection groove is formed on the front of the mold assembly. Multiple flow guide grooves are formed on the back wall of the bone cement injection groove. Bone cement bead forming grooves are formed on the back of the flow guide grooves. These multiple bone cement bead forming grooves are arranged in a straight line and communicate with the wire groove. Both sides of the lower mold have… A steel wire fixing unit is provided, one of which is fixedly installed on one side of the bone cement bead lower mold, and the other is slidably installed on the other side of the bone cement bead lower mold. The main body of the steel wire fixing unit is a connecting base. The top of the connecting base is provided with a sliding upper pressure block. The top of the sliding upper pressure block is rotatably installed with a lifting threaded column. The middle of the lifting threaded column is threaded with a fixed connecting arm. The bottom of both ends of the fixed connecting arm is fixedly connected with guide sliding columns. The bottom end of the guide sliding column passes through the fixed connecting arm and is fixedly installed on the top of the connecting base.

[0009] As a further improvement of this utility model: cooling flow grooves are provided inside both the upper mold and the lower mold of the bone cement beads, and cooling insertion holes are provided at both ends of the front wall of the cooling flow grooves.

[0010] As a further improvement of this utility model: the lower surface of the upper mold of the bone cement bead is fixedly connected with a plurality of mating blocks, and the upper surface of the lower mold of the bone cement bead is provided with a plurality of mating grooves.

[0011] As a further embodiment of this utility model: the upper mold of the bone cement bead is fixedly connected to the front of the infusion nozzle upper shell, and the lower mold of the bone cement bead is fixedly connected to the front of the infusion nozzle lower shell.

[0012] As a further improvement of this utility model: a positioning connecting tube is fixedly connected to the front of the lower shell of the injection nozzle, and a sealing sleeve is threaded onto the outer wall of the positioning connecting tube.

[0013] As a further improvement of this utility model: a plurality of mounting connecting columns are fixedly installed on the top of the upper mold of the bone cement bead, and a mounting connecting plate is fixedly connected to the top of the mounting connecting column.

[0014] As a further embodiment of this utility model: a lifting cylinder is fixedly installed on the upper surface of the mounting connecting plate, and a mounting back plate is provided on the back of the lifting cylinder.

[0015] As a further embodiment of this utility model: a bearing base is fixedly installed at the bottom of the mounting back plate, and a positioning mounting frame is fixedly connected to the top of the bearing base, and the bone cement bead lower mold is fixedly installed in the positioning mounting frame.

[0016] Compared with the prior art, this utility model provides a bone cement mold that can be quickly demolded, which has the following beneficial effects:

[0017] 1. This bone cement mold uses low-temperature water flowing inside a cooling tank to cool the surface of the solidified bone cement beads, causing the surface of the bone cement beads to shrink and detach from the wall of the bone cement bead forming tank. This facilitates the demolding of the bone cement beads without the need for steel wire pulling, reducing demolding difficulty and improving the overall ease of use of the device.

[0018] 2. The bone cement mold is closed by a lifting cylinder to ensure that bone cement slurry will not flow into the gap between the upper and lower molds of the bone cement beads after the mold is closed; at the same time, it can ensure that the upper mold of the bone cement beads is evenly stressed, thus ensuring the molding effect of the bone cement beads.

[0019] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the overall assembly of this utility model Figure 1 ;

[0021] Figure 2 This utility model Figure 1 A magnified schematic diagram of the local structure at point A;

[0022] Figure 3 Schematic diagram of the three-dimensional structure of the overall assembly of this utility model Figure 2 ;

[0023] Figure 4 This is a partial cross-sectional view of the overall assembly of this utility model.

[0024] In the diagram: 1. Support base; 2. Mounting back plate; 3. Cylinder mounting bracket; 4. Lifting cylinder; 5. Mounting connecting plate; 6. Mounting connecting column; 7. Upper mold of bone cement beads; 8. Positioning mounting frame; 9. Lower mold of bone cement beads; 10. Mating slot; 11. T-connecting pipe; 12. Wire slot; 13. Adjusting threaded rod; 14. Connecting base; 15. Sliding upper pressure block; 16. Lifting threaded column; 17. Guide slide column; 18. Fixed connecting arm; 19. Mounting arm plate; 20. Limiting slide column; 21. Mating block; 22. Bone cement injection tank; 23. Diversion guide channel; 24. Bone cement bead forming tank; 25. Upper shell of injection nozzle; 26. Lower shell of injection nozzle; 27. Positioning connecting pipe; 28. Sealing sleeve; 29. ​​Cooling insertion hole; 30. Cooling flow channel. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] A type of bone cement mold that allows for rapid demolding, such as Figures 1 to 4 As shown, the assembly includes an upper mold 7 and a lower mold 9 for bone cement beads that are fitted together. The lower surface of the upper mold 7 has multiple mating blocks 21 integrally formed at the four corners. The upper surface of the lower mold 9 has multiple mating slots 10 that are adapted to fit and engage with the mating blocks 21.

[0027] Multiple mounting connecting columns 6 are fixedly installed on the top of the bone cement bead upper mold 7. Mounting connecting plates 5 are fixedly connected to the top of the mounting connecting columns 6. A lifting cylinder 4 is fixedly installed on the upper surface of the mounting connecting plate 5. A cylinder mounting bracket 3 is fixedly installed on the outer wall of the lifting cylinder 4. A mounting back plate 2 is fixedly installed on the back of the cylinder mounting bracket 3.

[0028] The bottom of the mounting back plate 2 is fixedly installed with a support base 1, and the top of the support base 1 is fixedly connected with a positioning mounting frame 8. The lower mold 9 of the bone cement bead is fixedly installed in the positioning mounting frame 8. The lifting cylinder 4 controls the lower mold 7 of the bone cement bead to descend. Under the limit of the matching block 21 and the matching groove 10, the upper mold 7 of the bone cement bead and the lower mold 9 of the bone cement bead complete the mold closing.

[0029] The mold is closed by lifting cylinder 4 to ensure that the gap between the upper mold 7 and the lower mold 9 of the cement beads will not flow into the cement slurry after the mold is closed; at the same time, the upper mold 7 of the cement beads can be evenly stressed to ensure the molding effect of the cement beads.

[0030] A wire slot 12 is provided in the middle of the assembly surface formed by the upper mold 7 and the lower mold 9 of the bone cement beads. The two ends of the wire slot 12 pass through both sides of the mold assembly, and the wires that form the bone cement bead chain are placed inside the wire slot 12.

[0031] The front side of the mold assembly has a bone cement injection groove 22. The back wall of the bone cement injection groove 22 is spherical, and its front end is cylindrical. The diameter of the spherical part is larger than the diameter of the cylindrical part, so that the pressure of the slurry can be increased after the bone cement slurry is injected.

[0032] The back wall of the bone cement injection tank 22 is provided with multiple diversion channels 23. The diversion channels 23 are cylindrical straight channels, and the back wall of the diversion channels 23 is provided with a bone cement bead forming channel 24. The bone cement slurry inside the bone cement injection tank 22 can quickly enter the bone cement bead forming channel 24 through the diversion channels 23.

[0033] Multiple bone cement bead forming grooves 24 are arranged in a straight line and connected to the wire slot 12. The axis of the wire slot 12 coincides with the axis of the bone cement bead forming groove 24. After the bone cement enters the bone cement bead forming groove 24, it quickly solidifies into bone cement beads with the wire as the center.

[0034] Both sides of the bone cement bead lower mold 9 are provided with wire fixing units. The main body of the wire fixing unit is a connecting base 14. The top of the connecting base 14 is provided with a sliding upper pressure block 15. The connecting surface of the sliding upper pressure block 15 and the connecting base 14 is provided with a wire fixing groove corresponding to the wire slot 12, so as to facilitate the fixing of the end of the wire.

[0035] A lifting threaded column 16 is rotatably installed on the top of the sliding upper pressure block 15. A fixed connecting arm 18 is threadedly connected to the middle of the lifting threaded column 16. Guide slide columns 17 are fixedly connected to the bottom of both ends of the fixed connecting arm 18. The bottom end of the guide slide column 17 passes through the fixed connecting arm 18 and is fixedly installed on the top of the connecting base 14. The guide slide column 17 is slidably connected to the sliding upper pressure block 15 through a linear bearing.

[0036] The lifting threaded column 16 rotates clockwise, causing the sliding upper pressure block 15 to move downward, bringing the sliding upper pressure block 15 close to the connecting base 14, and then pressing down on the end of the steel wire.

[0037] One of the wire fixing units is fixedly installed on one side of the bone cement bead lower mold 9. The connecting base 14 of the wire fixing unit has multiple fixing bolts threaded on one side. The fixing bolts pass through the connecting base 14 and extend outward. The outer wall of the extended end is threaded with a positioning installation sleeve. The positioning installation sleeve is welded to one side of the bone cement bead lower mold 9.

[0038] Another wire fixing unit is slidably installed on the other side of the bone cement bead lower mold 9. The lower part of the connecting base 14 of the wire fixing unit is threaded with an adjusting threaded rod 13. One end of the adjusting threaded rod 13 is rotatably connected to the bone cement bead lower mold 9, and the outer wall of the other end is rotatably sleeved with an installation arm plate 19. Both ends of the installation arm plate 19 are welded with limit sliding pins 20. The limit sliding pins 20 pass through the connecting base 14 and extend towards the bone cement bead lower mold 9. The extended end is fixedly sleeved with a limit clamp, which is welded to the bone cement bead lower mold 9.

[0039] Cooling flow grooves 30 are provided inside the upper mold 7 and the lower mold 9 of the bone cement bead. The cooling flow grooves 30 are close to the bone cement bead forming groove 24, and cooling insertion holes 29 are provided at both ends of the front wall of the cooling flow grooves 30. The cooling insertion holes 29 penetrate the upper mold 7 and the lower mold 9 of the bone cement bead.

[0040] After the upper mold 7 and lower mold 9 of the bone cement bead are closed and the bone cement is poured, and after the bone cement bead has solidified, a three-way connecting pipe 11 is inserted into the cooling insertion holes 29 at both ends of the mold assembly. The three-way connecting pipe 11 is as follows: Figure 4 As shown, one of its vents is connected to a low-temperature water circulation device (not shown), which allows the low-temperature water to circulate inside the cooling flow tank 30, thereby rapidly reducing the temperature of the surface of the bone cement beads inside the bone cement bead forming tank 24 and separating them from the tank wall of the bone cement bead forming tank 24, making demolding easier.

[0041] The upper mold 7 of the bone cement bead is fixedly connected to the front of the infusion nozzle upper shell 25, and the lower mold 9 of the bone cement bead is fixedly connected to the front of the infusion nozzle lower shell 26. The infusion nozzle upper shell 25 is snapped into the inside of the infusion nozzle lower shell 26, forming a complete infusion nozzle.

[0042] A positioning connecting tube 27 is fixedly connected to the front of the lower shell 26 of the injection nozzle. A sealing sleeve 28 is threaded onto the outer wall of the positioning connecting tube 27. The tail end of the sealing sleeve 28 is fitted onto the outer wall of the injection nozzle to further seal the assembly gap between the upper shell 25 and the lower shell 26 of the injection nozzle.

[0043] Working principle:

[0044] Please refer to Figures 1 to 4 Assemble the device as shown in the figure;

[0045] In use, the two ends of the steel wire are first fixed inside the two steel wire fixing units. Then, the adjusting threaded rod 13 is rotated clockwise to move the corresponding steel wire fixing unit away from the lower mold 9 of the bone cement bead. The steel wire is then tightened. Next, the lifting cylinder 4 is activated, extending and lowering the upper mold 7 of the bone cement bead through the mounting connecting plate 5, closing with the lower mold 9. Then, the rotating sealing sleeve 28 is rotated clockwise to fit over the outside of the infusion nozzle. Then, the bone cement is injected into the infusion tank 22 through the infusion nozzle. Bone cement slurry is poured in and enters the bone cement bead forming tank 24 through the diversion channel 23. After the bone cement solidifies, a three-way connecting pipe 11 is inserted into the cooling insertion hole 29. The two three-way connecting pipes 11 are connected to the low-temperature water circulation device (the low-temperature water circulation device can also be replaced with a low-temperature airflow circulation device), so that the low-temperature water flows in the cooling flow tank 30, which rapidly reduces the surface temperature of the bone cement beads in the bone cement bead forming tank 24, causing them to separate from the tank wall of the bone cement bead forming tank 24, making demolding easier.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid demouldable bone cement mould comprising an upper bone cement bead upper mould (7) and a lower bone cement bead lower mould (9) which are mated together to form a mould assembly, characterised in that: A wire slot (12) is provided in the middle of the assembly surface formed by the upper mold (7) and the lower mold (9) of the bone cement bead. The two ends of the wire slot (12) penetrate through both sides of the mold assembly. A bone cement injection groove (22) is provided on the front side of the mold assembly. Multiple diversion guide grooves (23) are provided on the back wall of the bone cement injection groove (22). A bone cement bead forming groove (24) is provided on the back groove of the diversion guide groove (23). The multiple bone cement bead forming grooves (24) are arranged in a straight line and communicate with the wire slot (12). A wire fixing unit is provided on both sides of the lower mold (9) of the bone cement bead. One of the wire fixing units is fixedly installed. On one side of the bone cement bead lower mold (9), another wire fixing unit is slidably installed on the other side of the bone cement bead lower mold (9); the main body of the wire fixing unit is configured as a connecting base (14), the top of the connecting base (14) is provided with a sliding upper pressure block (15), the top of the sliding upper pressure block (15) is rotatably installed with a lifting threaded column (16), the middle of the lifting threaded column (16) is threaded with a fixed connecting arm (18), the bottom of both ends of the fixed connecting arm (18) is fixedly connected with a guide slide column (17), the bottom end of the guide slide column (17) passes through the fixed connecting arm (18) and is fixedly installed on the top of the connecting base (14).

2. A bone cement mold that can be quickly demolded according to claim 1, characterized in that: The upper mold (7) and lower mold (9) of the bone cement bead are both provided with cooling flow grooves (30), and cooling insertion holes (29) are provided at both ends of the front wall of the cooling flow groove (30).

3. The bone cement mold with rapid demolding according to claim 1, characterized in that: The lower surface of the upper mold (7) of the bone cement bead is fixedly connected with a plurality of mating blocks (21), and the upper surface of the lower mold (9) of the bone cement bead is provided with a plurality of mating slots (10).

4. The bone cement mold with rapid demolding according to claim 1, characterized in that: The upper mold (7) of the bone cement bead is fixedly connected to the front of the infusion nozzle upper shell (25), and the lower mold (9) of the bone cement bead is fixedly connected to the front of the infusion nozzle lower shell (26).

5. A bone cement mold with rapid demolding according to claim 4, characterized in that: The front of the lower shell (26) of the injection nozzle is fixedly connected to a positioning connecting tube (27), and a sealing sleeve (28) is threaded onto the outer wall of the positioning connecting tube (27).

6. A bone cement mold for rapid demolding according to claim 1, characterized in that: Multiple mounting connecting columns (6) are fixedly installed on the top of the upper mold (7) of the bone cement bead, and mounting connecting plates (5) are fixedly connected to the top of the mounting connecting columns (6).

7. A bone cement mold with rapid demolding capability according to claim 6, characterized in that: A lifting cylinder (4) is fixedly installed on the upper surface of the mounting connecting plate (5), and a mounting back plate (2) is provided on the back of the lifting cylinder (4).

8. A bone cement mold with rapid demolding according to claim 7, characterized in that: The bottom end of the mounting back plate (2) is fixedly installed with a bearing base (1), and the top end of the bearing base (1) is fixedly connected with a positioning mounting frame (8). The bone cement bead lower mold (9) is fixedly installed in the positioning mounting frame (8).

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