Mold structure suitable for artificial joint

Abstract

The utility model discloses a mould structure suitable for artificial joints, which comprises an upper mould, the bottom of the upper mould is in movable contact with a lower mould, a plurality of profiling cavities matched with artificial joint workpieces are formed between the upper mould and the lower mould, and two sides of the bottom of the upper mould are respectively provided with two positioning grooves. The top of the lower die is fixedly connected with four positioning columns movably inserted into the corresponding positioning grooves, and four vent holes communicating with the corresponding profiling cavities are formed in the bottom of the lower die. According to the utility model, a series of structures are arranged, so that the four vent holes can be automatically and completely blocked during mold closing and the upper half parts of the vent holes can be deblocked during mold opening, and the phenomenon that a material body flows into the vent holes to cause blockage during material injection is effectively avoided in a manner of completely blocking the vent holes by virtue of downward movement force of the upper mold during mold closing; and the upper half part is automatically blocked during mold opening, so that the artificial joint workpiece can be conveniently and safely ejected upwards by utilizing pneumatic force.

Description

TECHNICAL FIELD

[0001] The utility model relates to artificial joint blank casting technical field, concretely to a mould structure suitable for artificial joint. BACKGROUND

[0002] Artificial joint is the replacement of the damaged joint of human body, usually adopts the form of fine processing after mould casting; in order to improve production efficiency, in the medium temperature wax precision casting, the steel top rod mechanism is selected according to the structure of artificial joint workpiece to assist the completion of artificial joint workpiece taking when mould design, the general work flow is mold closing-wax injection-mold opening-top rod ejecting artificial joint workpiece, this kind of ejection structure is often applied to the artificial joint workpiece of shape specification, no reverse buckle (i.e. inclined surface inclination has damping), however, the artificial joint (such as knee joint, hip joint prosthesis, etc.) artificial joint workpiece shape is irregular or has reverse buckle (i.e. inclined surface inclination has damping), the integrity of artificial joint workpiece is damaged even leads to artificial joint workpiece scrap when top rod mechanism ejects, thereby causing certain influence on the casting quality and precision of artificial joint artificial joint workpiece.

[0003] For this, through the search report of the novelty search agency, the announcement number CN220808389U discloses a mould structure suitable for artificial joint, including upper mould and lower mould, the upper mould and lower mould can realize the cooperation of mold closing and mold opening, the upper mould is provided with upper cavity, the lower mould is provided with lower cavity, the upper cavity and lower cavity are arranged in upper and lower correspondence, and a profiling cavity body adapting to artificial joint workpiece is formed between the upper mould and lower mould. By connecting the air inlet hole with the air compressor, after the artificial joint workpiece is formed and the upper mould moves up, the compressed air can be delivered into the air inlet channel by the air compressor, so that the compressed air blows up the artificial joint workpiece, the contact is softer, and the surface or structure of the artificial joint workpiece is not damaged, thereby improving the efficiency and avoiding the damage of the artificial joint workpiece.

[0004] The mould structure suitable for artificial joint disclosed by the above technology is provided with gaps and air passages for ventilation at the bottom of the profiling cavity for artificial joint workpiece casting, which realizes the safe application effect of soft ejection of artificial joint workpiece by air force (reduces the impact damage phenomenon of joint workpiece with inclined surface caused by traditional steel top rod direct hard impact), but still has the following disadvantages in use:

[0005] The gaps and air passages are always communicated with the profiling cavity, when the fluid material is injected, the fluid material inevitably flows into the gaps and air passages due to fluidity, which causes the blockage of the gaps and air passages and makes it difficult to supply air for subsequent ejection work, and the use stability is not ideal; improvement is needed, and therefore, the present application proposes a mould structure suitable for artificial joint to solve the above problems. UTILITY MODEL CONTENTS

[0006] The purpose of this invention is to provide a mold structure suitable for artificial joints to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a mold structure suitable for artificial joints, comprising:

[0008] The upper mold has a lower mold that is in contact with the bottom. The upper mold and the lower mold form multiple contoured cavities that are adapted to the artificial joint workpiece. Two positioning grooves are opened on both sides of the bottom of the upper mold. Four positioning pins that are movably inserted into the corresponding positioning grooves are fixedly connected to the top of the lower mold. Four ventilation holes that are connected to the corresponding contoured cavities are opened at the bottom of the lower mold.

[0009] The U-shaped base is located below the lower mold. Two connecting seats are fixedly connected to the top two sides of the U-shaped base, and all four connecting seats are connected to the bottom of the lower mold.

[0010] The extrusion drive assembly moves through the U-shaped base, lower die, and four positioning posts, and makes contact with the top inner wall of the four positioning slots.

[0011] The lever-type unsealing and plugging assembly consists of four sets, each movably fitted into a corresponding vent hole, and fixedly connected to the U-shaped base and the extrusion drive assembly. The extrusion drive assembly is used to extrude and drive one end of each of the four lever-type unsealing and plugging assemblies to move synchronously downwards to store elastic energy when the upper mold moves downwards to close the mold. The four lever-type unsealing and plugging assemblies are used to automatically plug the four vent holes when one end moves downwards to prevent the material from flowing into the vent holes and causing blockage during injection. They are also used to automatically move back using elastic force to unseal the upper part of the four vent holes when the upper mold moves upwards to open the mold.

[0012] The air supply assembly is installed on the lower mold and connected to the top of one side near the four vent holes. The air supply assembly is used to connect to an external air supply device for air supply and to supply gas into the four contour cavities when the upper part of the four vent holes is unsealed, so as to use the gas to safely eject the artificial joint workpiece.

[0013] Preferably, all four connecting seats are fixedly connected to the bottom of the lower mold by welding.

[0014] Preferably, the four connecting seats are detachably connected to the bottom of the lower mold.

[0015] Preferably, the top of the connecting seat is provided with a slot, and two locking blocks are fixedly connected to the bottom of both sides of the lower mold. The bottom of the locking blocks is movably locked into the corresponding slots. The two opposing locking blocks are pressed against the clamping bolts on their opposing sides. The outer side of the connecting seat is provided with threaded holes that are threadedly connected to the corresponding clamping bolts.

[0016] Preferably, the extrusion linkage assembly comprises a lifting plate arranged inside the U-shaped base, the top of the lifting plate is fixedly connected with two top rods on both sides, the top ends of the four top rods are in movable contact with the top inner walls of the corresponding positioning grooves, the U-shaped base and the lower mold are movably sleeved on the four top rods, and the four positioning columns are movably sleeved on the corresponding top rods.

[0017] Preferably, the force-borrowing type unblocking plugging assembly comprises a plugging rod movably sleeved in the corresponding air hole, the bottom of the plugging rod is fixedly connected with an L-shaped limiting rod in movable contact with the bottom of the lower mold, the top of the U-shaped base is provided with four recesses in a rectangular shape, the bottom inner wall of the recess is fixedly connected with a tensile spring in a stretched state between the bottom end of the corresponding plugging rod, the top of the U-shaped base is rotatably provided with two fixed pulleys on both sides, the bottom inner wall of the L-shaped limiting rod is fixedly provided with a soft steel wire rope, and one end of the soft steel wire rope is wound around the top of the corresponding fixed pulley and is fixedly installed on the top of the lifting plate.

[0018] Preferably, the gas supply assembly comprises an air inlet hole arranged at the front bottom of the lower mold, a communication hole arranged on the lower mold is communicated between the air inlet hole and the top of one side of the four air holes, and a gas pipe joint is fixedly installed on the front bottom of the lower mold and communicated with the air inlet hole.

[0019] Preferably, the elastic force of the four tensile springs in the stretched state is greater than the sum of the gravity of the four plugging rods, the four L-shaped limiting rods, the lifting plate, the four top rods and the friction with the U-shaped base, the lower mold and the positioning column structural members.

[0020] Preferably, the top of the upper mold is provided with four injection holes vertically aligned and communicated with the corresponding profiling cavities.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The upper mold, the lower mold, the positioning groove, the U-shaped base, the connecting seat, the air hole, the extrusion linkage assembly and the force-borrowing type unblocking plugging assembly are matched, automatic complete plugging of the four air holes during mold closing and unblocking of the upper half of the air hole during mold opening are realized, the air hole is completely plugged during mold closing by using the downward force of the upper mold, and the phenomenon that the material flows into the air hole during injection is effectively avoided;

[0023] 2. The upper half is automatically plugged during mold opening, the gas supply assembly is matched, and the artificial joint workpiece is safely ejected upward by using gas force;

[0024] 3. The connecting seat, the pressing bolt, the clamping groove and the clamping block are matched, the lower mold and the lower structure are conveniently separated, normal periodic maintenance and replacement work of the lower structure are conveniently performed, and convenience is provided for subsequent maintenance work.

[0025] The utility model discloses a series of structures are set up, and it is convenient to automatically seal four air holes completely when clamping and unseal the upper half of air hole when opening, by the way of using the force of the upper die moving down to seal the air hole completely when clamping, effectively avoid the phenomenon of blocking when the material flows into the air hole, and by automatically sealing the upper half when opening, it is convenient to use the air pressure to safely eject the artificial joint workpiece upward. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The whole structure schematic diagram of the mold structure suitable for artificial joint is provided for the embodiment one of the utility model;

[0027] Figure 2 The main view section structure schematic diagram of the mold structure suitable for artificial joint is provided for the embodiment one of the utility model;

[0028] Figure 3 The main view section structure schematic diagram of the mold structure suitable for artificial joint is provided for the embodiment one of the utility model; Figure 2

[0029] Figure 4 The main view section structure schematic diagram of the mold structure suitable for artificial joint is provided for the embodiment two of the utility model.

[0030] In the drawing: 100, artificial joint workpiece;1, upper die;101, positioning groove;102, lower die;103, positioning column;2, air hole;201, communication hole;202, air inlet;203, air pipe joint;3, U-shaped base;301, connecting seat;302, clamping groove;303, press solid bolt;304, clamping block;4, lifting plate;401, ejector rod;402, fixed pulley;403, L-shaped limiting rod;404, soft steel wire rope;405, tension spring;406, sealing rod. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the utility model.

[0032] Embodiment one

[0033] As shown in the drawing, the mold structure suitable for artificial joint provided by the embodiment includes: Figures 1 to 3

[0034] ​​The upper die 1 has a bottom which is movably contacted with the lower die 102, a plurality of profiling cavities which are adapted to the artificial joint workpiece 100 are formed between the upper die 1 and the lower die 102, two positioning grooves 101 are formed in the bottom of the upper die 1, four positioning columns 103 which are movably inserted into the corresponding positioning grooves 101 are fixedly connected to the top of the lower die 102, four air holes 2 which are communicated with the corresponding profiling cavities are formed in the bottom of the lower die 102, and four material injection holes which are vertically aligned with the corresponding profiling cavities are formed in the top of the upper die 1;

[0035] The U-shaped base 3 is arranged below the lower die 102, two connecting seats 301 are fixedly connected to the top of the U-shaped base 3, the four connecting seats 301 are connected to the bottom of the lower die 102, and the four connecting seats 301 are fixedly connected to the bottom of the lower die 102 by welding;

[0036] The extrusion linkage assembly is movably penetrated through the U-shaped base 3, the lower die 102 and the four positioning columns 103 and movably contacted with the inner wall of the top of the four positioning grooves 101;

[0037] The leverage type unblocking and plugging assembly is four groups and is movably sleeved in the corresponding air holes 2 and is fixedly connected with the U-shaped base 3 and the extrusion linkage assembly; the extrusion linkage assembly is used for extruding and driving one end of the four leverage type unblocking and plugging assemblies to move downward synchronously to store elastic energy when the upper die 1 moves downward to close the mold, the four leverage type unblocking and plugging assemblies are used for automatically plugging the four air holes 2 when the one end moves downward, preventing the material from flowing into the air holes 2 to cause blockage during material injection, and are used for automatically returning to unblock the upper half of the four air holes 2 by using the elastic force when the upper die 1 moves upward to open the mold;

[0038] The gas supply assembly is arranged on the lower die 102 and is communicated with the top of the side near the four air holes 2; the gas supply assembly is used for connecting the external gas supply equipment to perform gas supply work and is used for supplying gas into the four profiling cavities when the upper half of the four air holes 2 is unblocked, so as to safely eject the artificial joint workpiece 100 by using the gas.

[0039] Specifically, the extrusion linkage assembly comprises a lifting plate 4 arranged inside the U-shaped base 3, and the top of the lifting plate 4 is fixedly connected with two top rods 401 on both sides, the top ends of the four top rods 401 are in movable contact with the top inner walls of the corresponding positioning grooves 101, the U-shaped base 3 and the lower die 102 are movably sleeved on the four top rods 401, and the four positioning columns 103 are movably sleeved on the corresponding top rods 401. The top of the U-shaped base 3 and the top of the lower die 102 are both provided with four first movable perforations, the top of each of the four positioning columns 103 is provided with a second movable perforation, the outer side of the top rod 401 is in movable contact with the inner walls of the corresponding first movable perforation and second movable perforation, thereby achieving the effect of guiding the top rod 401 to move vertically; the lifting plate 4 and the top rod 401 are arranged in cooperation, and when the upper die 1 moves downward to perform die closing, the top inner walls of the four positioning grooves 101 drive the four top rods 401 to be extruded downward, and under the extrusion force, the four top rods 401 move downward and drive the lifting plate 4 to move downward.

[0040] Further, the leverage type unblocking and plugging assembly comprises a plugging rod 406 movably sleeved in the corresponding air hole 2, the bottom of the plugging rod 406 is fixedly connected with an L-shaped limiting rod 403 in movable contact with the bottom of the lower die 102, the top of the U-shaped base 3 is provided with four recesses in a rectangular shape, a tensile spring 405 in a tensile state is fixedly connected between the bottom inner wall of the recess and the bottom end of the corresponding plugging rod 406, two fixed pulleys 402 are rotatably installed on both sides of the top of the U-shaped base 3, a soft steel wire rope 404 is fixedly installed on the bottom inner wall of the L-shaped limiting rod 403, one end of the soft steel wire rope 404 passes over the top of the corresponding fixed pulley 402 and is fixedly installed on the top of the lifting plate 4, and the top of the U-shaped base 3 is provided with four rope passing holes, the soft steel wire rope 404 is located in the corresponding rope passing hole and does not contact the inner wall of the rope passing hole, thereby achieving the effect that the soft steel wire rope 404 does not contact and passes through;

[0041] The distance between the bottom of the L-shaped limiting rod 403 and the top of the U-shaped base 3 is smaller than the length of the plugging rod 406 inserted into the air hole 2;

[0042] The set plugging rod 406, L-shaped limiting rod 403, extension spring 405, fixed pulley 402 and soft steel wire rope 404 cooperate to drive one end of the four soft steel wire ropes 404 to move downward when the lifting plate 4 moves downward, the soft steel wire ropes 404 slide outside the corresponding fixed pulleys 402, and pull the corresponding L-shaped limiting rods 403 to move upward, the L-shaped limiting rods 403 stretch the corresponding extension springs 405, and drive the top end of the plugging rod 406 to move upward to be flush with the top of the corresponding air hole 2, thereby realizing the effect of automatically completely plugging the four air holes 2 when the mold is closed, so as to prevent the material from flowing into the air hole 2 during injection to cause the phenomenon of blockage; in addition, when the upper mold 1 moves upward to open the mold, it drives the positioning groove 101 to upwardly release the extrusion force on the four ejector rods 401, at this time, the extension spring 405 in the stretched state drives the corresponding L-shaped limiting rod 403 to move downward, the four L-shaped limiting rods 403 pull the lifting plate 4 to move upward through the four soft steel wire ropes 404, drive the ejector rod 401 to move upward, and at the same time, the four L-shaped limiting rods 403 move downward to drive the four plugging rods 406 to move downward, thereby releasing the plugging of the upper half of the four air holes 2, realizing the effect of automatically completely plugging the four air holes 2 when the mold is closed and releasing the upper half of the air holes 2 when the mold is opened.

[0043] Further, the gas supply assembly includes an air inlet hole 202 arranged at the front bottom of the lower mold 102, a communication hole 201 arranged on the lower mold 102 is communicated between the air inlet hole 202 and the top of one side of the four air holes 2, and a gas pipe joint 203 communicated with the air inlet hole 202 is fixedly installed at the front bottom of the lower mold 102; the distance between the bottom of the L-shaped limiting rod 403 and the top of the U-shaped base 3 is greater than the distance between the communication hole 201 and the top of the air hole 2.

[0044] The set air inlet hole 202, communication hole 201 and gas pipe joint 203 cooperate to connect the gas pipe joint 203 with the external gas supply equipment, perform the gas supply work into the air inlet hole 202, and when the upper half of the air hole 2 is released after the mold is opened, the four communication holes 201 are released, the supplied gas is distributed to the four air holes 2 through the four communication holes 201, and then enters the profiling cavity upward, thereby performing the pneumatic safety ejection work on the artificial joint workpiece 100 upward.

[0045] Further, the elastic force of the four extension springs 405 in the stretched state is greater than the sum of the gravity of the four plugging rods 406, the four L-shaped limiting rods 403, the lifting plate 4, the four ejector rods 401 and the friction with the U-shaped base 3, the lower mold 102 and the positioning column 103 structural members.

[0046] The embodiment facilitates automatic complete blocking of the four air holes 2 during mold closing and automatic unblocking of the upper half of the air holes 2 during mold opening. By using the downward movement of the upper mold 1 to completely block the air holes 2 during mold closing, the phenomenon of blocking of the material flowing into the air holes 2 during injection is effectively avoided. By automatically blocking the upper half during mold opening, the artificial joint workpiece 100 is conveniently and safely ejected upward by using air pressure.

[0047] The use method of the embodiment is as follows: when the mold structure suitable for artificial joints is used, the U-shaped base 3 is fixed on the workbench by bolts, and the upper mold 1 is installed on the driving device. During work, the driving device drives the upper mold 1 to move downward until it merges with the lower mold 102, achieving the state of mold closing. During mold closing, the upper mold 1 drives the four positioning grooves 101 to be respectively sleeved on the corresponding positioning columns 103, and then wax is injected through the injection hole to extrude the artificial joint workpiece 100.

[0048] During the downward movement of the upper mold 1 for mold closing, the top inner wall of the four positioning grooves 101 also extrudes the four jack rods 401 downward. Under the extrusion force, the four jack rods 401 move downward and drive the lifting plate 4 to move downward. When the lifting plate 4 moves downward, one end of the four soft steel wire ropes 404 is displaced downward. The soft steel wire ropes 404 slide outside the corresponding fixed pulleys 402 and pull the corresponding L-shaped limiting rods 403 to move upward. The L-shaped limiting rods 403 stretch the corresponding tension springs 405 and drive the top ends of the blocking rods 406 to move upward to be flush with the top of the corresponding air holes 2, achieving the effect of automatic complete blocking of the four air holes 2 during mold closing, thereby preventing the material from flowing into the air holes 2 during injection. In addition, when the upper mold 1 moves upward for mold opening after use, it drives the positioning grooves 101 to extrude the four jack rods 401 upward. At this time, the tension springs 405 in the stretched state drive the corresponding L-shaped limiting rods 403 to move downward. The four L-shaped limiting rods 403 pull the lifting plate 4 upward through the four soft steel wire ropes 404, drive the jack rods 401 to move upward, and at the same time, the four L-shaped limiting rods 403 move downward and drive the four blocking rods 406 to move downward, unblocking the upper half of the four air holes 2, achieving the effect of automatic complete blocking of the four air holes 2 during mold closing and automatic unblocking of the upper half of the air holes 2 during mold opening. By using the downward movement of the upper mold 1 to completely block the air holes 2 during mold closing, the phenomenon of blocking of the material flowing into the air holes 2 during injection is effectively avoided.

[0049] Wherein after the upper half of the air hole 2 is unsealed after the mold is opened, the personnel connects the tracheal joint 203 with the external air supply equipment, and performs the air supply work to the air inlet hole 202, and when the upper half of the air hole 2 is unsealed after the mold is opened, the four communication holes 201 are unsealed, the supplied gas is branched to the four air holes 2 through the four communication holes 201, and then enters the shaped cavity upward, and the artificial joint workpiece 100 is upwardly air forced to be ejected; wherein the principle that the gas is more soft and safe than the steel structure ejection is prior art, and has been disclosed in the prior art CN220808389U, and will not be repeated here.

[0050] Embodiment two

[0051] As Figure 4 shown, the embodiment is based on the embodiment one, and is different from the embodiment one in that the four connecting seats 301 are detachably connected at the bottom of the lower mold 102, the top of the connecting seat 301 is provided with a clamping groove 302, the bottom of the two clamping blocks 304 fixedly connected at the bottom of the two sides of the lower mold 102 is movably clamped into the corresponding clamping groove 302, and the side of the two clamping blocks 304 opposite to each other is in contact with the pressing screw 303. The outer side of the connecting seat 301 is provided with a threaded hole in threaded connection with the corresponding pressing screw 303.

[0052] The embodiment facilitates the subsequent splitting of the lower mold 102 and the lower structure, thereby facilitating the subsequent maintenance and replacement work of the lower structure, and providing convenience for the subsequent maintenance work.

[0053] The use method of the embodiment is different from that of the embodiment one in that, based on the embodiment one, the following functions are further provided: in addition, the pressing screw 303, the clamping groove 302 and the clamping block 304 are cooperated to form the effect of clamping and screwing connection of the lower mold 102, and when the pressing screw 303 is reversely rotated to release the pressing of the clamping block 304, the lower mold 102 can be moved upward to be separated from the connecting seat 301 and the plugging rod 406, thereby facilitating the subsequent splitting of the lower mold 102 and the lower structure, facilitating the subsequent maintenance and replacement work of the lower structure, and providing convenience for the subsequent maintenance work.

[0054] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A mould structure suitable for artificial joints, comprising an upper mould (1), characterised in that: The utility model relates to a kind of artificial joint forming device, including: Upper die (1), bottom movable contact has lower die (102), a plurality of profiling cavities are formed between the upper die (1) and lower die (102) and adapt to artificial joint workpiece (100), two positioning grooves (101) are set in the bottom of upper die (1), four positioning columns (103) are fixedly connected with the top of lower die (102) respectively and movably inserted into corresponding positioning groove (101), four air holes (2) are set in the bottom of lower die (102) respectively and communicated with corresponding profiling cavity; U-shaped base (3) is arranged below lower die (102), two connecting seats (301) are fixedly connected with the top of U-shaped base (3) respectively, four connecting seats (301) are connected with the bottom of lower die (102); Extrusion linkage assembly movably penetrates U-shaped base (3), lower die (102) and four positioning columns (103) and movably contacts with the top inner wall of four positioning grooves (101); Levered unsealing plugging assembly, four groups are movably sleeved in corresponding air hole (2) respectively, and are fixedly connected with U-shaped base (3) and extrusion linkage assembly; Gas supply assembly is arranged on lower die (102) and communicated with the top of one side of four air holes (2).

2. A mold structure for artificial joints according to claim 1, characterized in that: Four connecting seats (301) are fixedly connected with the bottom of lower die (102) by welding.

3. The mold structure for artificial joints according to claim 1, wherein: Four connecting seats (301) are detachably connected to the bottom of lower die (102).

4. A mold structure for artificial joints according to claim 3, characterized in that: The top of connecting seat (301) is provided with clamping groove (302), and the bottom of two clamping blocks (304) is fixedly connected with the bottom of lower die (102), the bottom of clamping block (304) is movably clamped into corresponding clamping groove (302), and the side repelling of two clamping blocks (304) is extruded and contacted with press bolt (303), and the outer side of connecting seat (301) is provided with threaded hole screw-connected with corresponding press bolt (303).

5. The mold structure for artificial joints according to claim 1, wherein: The extrusion linkage assembly includes lifting plate (4), the lifting plate (4) is arranged in the inner side of U-shaped base (3), two top rods (401) are fixedly connected with the top of lifting plate (4) respectively, the top end of four top rods (401) is movably contacted with the top inner wall of corresponding positioning groove (101), U-shaped base (3) and lower die (102) are movably sleeved on four top rods (401), and four positioning columns (103) are movably sleeved on corresponding top rod (401).

6. A mold structure for artificial joints according to claim 5, characterized in that: The power-assisted deblocking assembly comprises a blocking rod (406) movably sleeved in the corresponding air hole (2), the bottom of the blocking rod (406) is fixedly connected with an L-shaped limiting rod (403) movably contacting the bottom of the lower die (102), the top of the U-shaped base (3) is rectangularly provided with four grooves, the bottom inner wall of the groove is fixedly connected with a tensile spring (405) in a tensile state between the bottom end of the corresponding blocking rod (406), both sides of the top of the U-shaped base (3) are rotatably provided with two fixed pulleys (402), the bottom inner wall of the L-shaped limiting rod (403) is fixedly installed with a soft steel wire rope (404), one end of the soft steel wire rope (404) is wound around the top of the corresponding fixed pulley (402) and is fixedly installed with the top of the lifting plate (4).

7. The mold structure for artificial joints according to claim 1, wherein: The air supply assembly comprises an air inlet hole (202) arranged on the front bottom of the lower die (102), and a communication hole (201) arranged on the lower die (102) is communicated between the air inlet hole (202) and the top of the side of the four air holes (2) close to each other, and the front bottom of the lower die (102) is fixedly installed with an air pipe joint (203) communicated with the air inlet hole (202).

8. A mold structure for artificial joints according to claim 6, characterized in that: The elastic force of the four tensile springs (405) in the tensile state is greater than the sum of the gravity of the four blocking rods (406), the four L-shaped limiting rods (403), the lifting plate (4), the four jacks (401) and the friction force of the U-shaped base (3), the lower die (102) and the positioning column (103) structural members.

9. The mold structure for artificial joints according to claim 1, wherein: The top of the upper die (1) is provided with four injection holes vertically aligned and communicated with the corresponding profiling cavities.

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