Metal injection molding mechanism for powder metallurgy

Abstract

The utility model discloses a metal injection molding mechanism for powder metallurgy, which belongs to the technical field of injection molding equipment and comprises a fixed seat, a hydraulic injection mechanism is mounted on the side surface of the fixed seat, a lifting component is embedded in the fixed seat, and the top of the lifting component is connected with a lifting frame. By arranging the lifting assembly, the motor drives the rotating shaft to drive the two second bevel gears to rotate, the two screws can rotate synchronously under meshing transmission between the second bevel gears and the first bevel gears, the two screws can rotate synchronously, the two screws can rotate synchronously, and the replacement assemblies are arranged on the side face of the lifting frame and the side face of the hydraulic injection mechanism. The lower lifting frame is connected between the screw rod and the threaded barrel in a meshed mode and can drive the lower module to move downwards, and a single motor replaces double hydraulic cylinders for driving, so that the cost of the device is fully reduced; according to the utility model, through the arrangement of the replacement assembly, the insertion rod is pulled to be separated from the insertion groove, and then the upper module and the lower module can be detached to be replaced with different modules for use, so that the applicability of the device is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding equipment, and in particular relates to a metal injection molding mechanism for powder metallurgy. Background Art

[0002] At present, powder injection molding technology is a new type of powder metallurgy near-net forming technology formed by introducing modern plastic injection molding technology into the field of powder metallurgy. It combines the advantages of powder metallurgy and plastic injection molding. It has broken through the limitations of traditional metal powder compression molding process on product shape, and can form three-dimensional parts with complex shapes in large quantities and with high efficiency. It has unparalleled advantages over conventional powder metallurgy, precision machining and precision casting. It can produce complex-shaped metal and ceramic parts in one forming process, just like producing plastic products. It is currently widely used in defense, communications, machinery, automobile, medical and other industries.

[0003] Chinese patent application No. 202223110070.1 discloses a metal injection molding mechanism for titanium alloy powder metallurgy, including: a No. 1 hydraulic cylinder, a barrel, a propulsion tube, a base shell and a No. 2 hydraulic cylinder, a No. 1 hydraulic rod is installed on the lower surface of the No. 1 hydraulic cylinder, a heater is installed on the circumferential surface of the propulsion tube, a pressure-stabilizing piston is installed inside the barrel, a feed port is opened on the left end surface of the barrel, a delivery pipe is fixed on the lower surface of the barrel, a No. 1 electric switch is installed inside the delivery pipe, a No. 1 electric push rod is installed on the lower surface of the No. 1 electric switch, the right end surface of the delivery pipe is connected to the propulsion tube, and a No. 2 electric switch is installed inside the propulsion tube. Compared with the prior art, the utility model has the following beneficial effects: by adding a pressure-stabilizing piston, a No. 1 hydraulic rod, a No. 1 electric switch and a No. 2 electric switch, the propulsion tube is directly pushed forward when injecting, the hydraulic pressure in the propulsion tube is stable, and uniform injection of titanium alloy powder is achieved.

[0004] In the above-mentioned public patent, the lower module is lifted and moved by two hydraulic cylinders driving two No. 2 hydraulic rods. The dual hydraulic cylinder drive makes the cost of the device relatively high. The upper mold and the lower mold are both connected and fixed to the device, and the mold cannot be replaced according to usage. The applicability of the device is low. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a metal injection molding mechanism for powder metallurgy, which has the characteristics of reducing cost and high applicability.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a metal injection molding mechanism for powder metallurgy, comprising a fixed seat, a hydraulic shooting mechanism is installed on the side of the fixed seat, a feeding barrel mechanism is arranged on the side of the hydraulic shooting mechanism, a pressure-stabilizing piston is installed on the top of the feeding barrel mechanism, an upper module is embedded in the bottom of the hydraulic shooting mechanism, a lifting component is embedded in the interior of the fixed seat, a lifting frame is connected to the top of the lifting component, a lower module is embedded in the interior of the lifting frame, replacement components are installed on the side of the lifting frame and the side of the hydraulic shooting mechanism, and a demolding mechanism is arranged on the top of the fixed seat.

[0007] Preferably, the lifting assembly includes a threaded barrel, a screw, bevel gear 1, bevel gear 2, a rotating shaft, a motor and an auxiliary assembly, wherein two screws are embedded in the interior of the fixed seat, the bottom end of the screw is connected to bevel gear 1, a motor is arranged on the side of the fixed seat, the side of the motor is connected to the rotating shaft, the surface of the rotating shaft is sleeved with two bevel gear 2, two threaded barrels are connected to the bottom of the lifting frame, an auxiliary assembly is embedded in the interior of the pressure-stabilizing piston, and the sides of bevel gear 1 and bevel gear 2 are meshed with each other.

[0008] Preferably, a positioning block is sleeved on the surface of the screw inside the fixing seat, and the positioning block is in a circular ring structure, and the second bevel gear is located on the same side as the corresponding meshing bevel gear one.

[0009] Preferably, the auxiliary component includes a handle, a fixed sleeve, a rotating block and a stirring rod, wherein the rotating block is embedded in the interior of the pressure-stabilizing piston, the top of the rotating block is connected to the stirring rod, the top of the stirring rod is connected to the handle, and the top of the pressure-stabilizing piston is provided with a fixed sleeve.

[0010] Preferably, the replacement component includes a slot, a sleeve block, a spring, a rod and a side seat, wherein side seats are installed on both sides of the lifting frame and on both sides of the bottom end of the pressure-stabilizing piston, the rod is embedded in the inside of the side seat, the surface of the rod is sleeved with a sleeve block, the outside of the sleeve block is installed with a spring, and slots are opened on both sides of the lower module and the upper module.

[0011] Preferably, the insertion rod and the slot are of a plug-in structure, and the lower module and the lifting frame, as well as the upper module and the hydraulic injection mechanism, are of a split structure.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets a lifting assembly, and the motor drives the rotating shaft to drive the two bevel gears to rotate. Under the meshing transmission between the bevel gears 2 and 1, the two screws can rotate synchronously, and the lifting frame can drive the lower module to move downward under the meshing connection between the screw and the threaded barrel. The single motor replaces the double hydraulic cylinder drive to fully reduce the cost of the device.

[0014] 2. The utility model sets a replacement component, pulls the insertion rod and the slot to separate, and then the upper module and the lower module can be removed to replace different modules for use, so that the applicability of the device is higher. Under the elastic force of the spring inside the side seat on the sleeve block, the insertion rod and the slot are tightly plugged together to ensure that the module is firmly installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 This is the front view of the lifting component of the utility model;

[0017] Figure 3 This is a front view of the auxiliary component of the utility model;

[0018] Figure 4 This is the front view of the replacement component of the utility model.

[0019] In the figure: 1. pressure-stabilizing piston; 2. feed barrel mechanism; 3. upper module; 4. lower module; 5. lifting assembly; 51. threaded barrel; 52. screw; 53. positioning block; 54. bevel gear one; 55. bevel gear two; 56. rotating shaft; 57. motor; 58. auxiliary assembly; 581. handle; 582. fixing sleeve; 583. rotating block; 584. stirring rod; 6. fixing seat; 7. demoulding mechanism; 8. replacement assembly; 81. slot; 82. sleeve block; 83. spring; 84. insertion rod; 85. side seat; 9. lifting frame; 10. hydraulic injection mechanism. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] See also Figure 1-4The utility model provides the following technical solutions: a metal injection molding mechanism for powder metallurgy, comprising a fixed seat 6, a hydraulic injection mechanism 10 is installed on the side of the fixed seat 6, a feeding barrel mechanism 2 is arranged on the side of the hydraulic injection mechanism 10, a pressure-stabilizing piston 1 is installed on the top of the feeding barrel mechanism 2, an upper module 3 is embedded in the bottom of the hydraulic injection mechanism 10, a lifting component 5 is embedded in the interior of the fixed seat 6, a lifting frame 9 is connected to the top of the lifting component 5, a lower module 4 is embedded in the interior of the lifting frame 9, replacement components 8 are installed on the sides of the lifting frame 9 and the sides of the hydraulic injection mechanism 10, and a demolding mechanism 7 is arranged on the top of the fixed seat 6.

[0023] Specifically, the lifting assembly 5 includes a threaded barrel 51, a screw 52, ​​a bevel gear 1 54, a bevel gear 2 55, a rotating shaft 56, a motor 57 and an auxiliary assembly 58. Two screws 52 are embedded in the interior of the fixed seat 6, and the bottom end of the screw 52 is connected to the bevel gear 1 54. A motor 57 is arranged on the side of the fixed seat 6, and the side of the motor 57 is connected to the rotating shaft 56. The surface of the rotating shaft 56 is sleeved with two bevel gears 2 55. The bottom of the lifting frame 9 is connected to two threaded barrels 51, and the auxiliary assembly 58 is embedded in the interior of the pressure stabilizing piston 1. The sides of the bevel gear 1 54 and the bevel gear 2 55 are meshed with each other.

[0024] By adopting the above technical solution, the motor 57 drives the rotating shaft 56 to drive the two bevel gears 55 to rotate. Under the meshing transmission between the bevel gear 2 55 and the bevel gear 1 54, the two screws 52 can rotate synchronously, and the meshing connection between the screw 52 and the threaded cylinder 51 can drive the lower module 4 to move downward. The single motor 57 replaces the dual hydraulic cylinder drive to fully reduce the cost of the device.

[0025] Specifically, a positioning block 53 is sleeved on the surface of the screw rod 52 inside the fixing seat 6 . The positioning block 53 is in a circular ring structure. The second bevel gear 55 is located on the same side as the corresponding meshing bevel gear 1 54 .

[0026] By adopting the above technical solution, the positioning block 53 plays a limiting role, which can make the meshing transmission between the bevel gear 2 55 and the bevel gear 1 54 more stable and firm, and the lifting and lowering control effect of the lifting frame 9 is better.

[0027] Specifically, the auxiliary component 58 includes a handle 581, a fixed sleeve 582, a rotating block 583 and a stirring rod 584. The rotating block 583 is embedded in the interior of the pressure-stabilizing piston 1, the top of the rotating block 583 is connected to the stirring rod 584, the top of the stirring rod 584 is connected to the handle 581, and the top of the pressure-stabilizing piston 1 is provided with a fixed sleeve 582.

[0028] By adopting the above technical solution, the fixed sleeve 582 limits the rotating block 584, and holding the handle 581 can control the rotation of the stirring rod 583, which can accelerate the flow of metal powder inside the feeding barrel mechanism 2 and make it quickly enter the hydraulic injection mechanism 10 to improve efficiency.

[0029] When this embodiment is used, metal powder for metallurgy is put into the feeding barrel mechanism 2, and the feeding barrel mechanism 2 opens the first switch through the electric push rod to allow the metal powder to enter the hydraulic injection mechanism 10. The fixed sleeve 582 limits the rotating block 584. Holding the handle 581 can control the rotation of the stirring rod 583, which can accelerate the flow of metal powder inside the feeding barrel mechanism 2 so that it can quickly enter the hydraulic injection mechanism 10 to improve efficiency. The hydraulic injection mechanism 10 first heats the metal and then opens the second switch at the bottom. The metal powder can be injected into the upper module 3 and the lower module 3 through hydraulic push. In the mold groove of module 4, after the workpiece is formed, the motor 57 is started to drive the rotating shaft 56 to drive the two bevel gears 55 to rotate. Under the meshing transmission between the bevel gear 2 55 and the bevel gear 1 54, the positioning block 53 plays a limiting role. The two screws 52 can rotate synchronously, and the meshing connection between the screw 52 and the threaded cylinder 51 can drive the lower module 4 to move downward. The single motor 57 replaces the double hydraulic cylinder drive to fully reduce the cost of the device. The ejector rod in the demolding mechanism 7 can eject the workpiece to complete the demolding, and the electric push rod on the side of the lifting frame 9 can push to complete automatic unloading.

[0030] Example 2

[0031] The present embodiment is different from the embodiment 1 in that the replacement component 8 includes a slot 81, a sleeve block 82, a spring 83, an insertion rod 84 and a side seat 85. Side seats 85 are installed on both sides of the lifting frame 9 and both sides of the bottom end of the pressure-stabilizing piston 1. The insertion rod 84 is embedded in the side seat 85. The surface of the insertion rod 84 is sleeved with a sleeve block 82. The outer side of the sleeve block 82 is installed with a spring 83. Slots 81 are provided on both sides of the lower module 4 and the upper module 3.

[0032] Specifically, the insertion rod 84 and the slot 81 are of a plug-in structure, and the lower module 4 and the lifting frame 9 and the upper module 3 and the hydraulic injection mechanism 10 are of a split structure.

[0033] By adopting the above technical solution, the rod 84 is pulled to separate from the slot 81, and then the upper module 3 and the lower module 4 can be disassembled and replaced with different modules for use, thereby making the device more applicable. Under the elastic force of the spring 83 inside the side seat 85 on the sleeve block 82, the rod 84 and the slot 81 are tightly plugged together to ensure that the module is firmly installed.

[0034] When the present embodiment is used, the insertion rod 84 is pulled to separate from the slot 81, and then the upper module 3 and the lower module 4 can be disassembled and replaced with different modules for use, thereby making the device more applicable. Under the elastic force of the spring 83 inside the side seat 85 on the sleeve block 82, the insertion rod 84 and the slot 81 are tightly plugged together to ensure that the module is firmly installed.

[0035] The motor 57 in the present invention is an existing disclosed technology, and the selected model is Z2D15W.

[0036] The structure and use principle of the pressure-stabilizing piston 1, the feed barrel mechanism 2, the upper module 3, the lower module 4, the fixed seat 6, the demolding mechanism 7, the lifting frame 9 and the hydraulic shooting mechanism 10 in the utility model have been disclosed in Chinese patent application No. 202223110070.1, which discloses a metal injection molding mechanism for titanium alloy powder metallurgy. Its working principle is to put metal powder for metallurgy into the feed barrel mechanism 2, and the feed barrel mechanism 2 opens the first electric switch through the electric push rod to allow the metal powder to enter the hydraulic shooting mechanism 10. The hydraulic shooting mechanism 10 heats the metal, and then opens the second electric switch at the bottom to shoot the metal powder into the mold groove of the upper module 3 and the lower module 4 through pressure. After the workpiece is formed, the lifting frame 9 is controlled by two hydraulic cylinders to drive the lower module 4 to move downward. The ejector rod in the demolding mechanism 7 can eject the workpiece to complete demolding, and the electric push rod on the side of the lifting frame 9 can push to complete automatic unloading.

[0037] Working principle and use process of the utility model: When the utility model is used, metal powder for metallurgy is put into the feeding barrel mechanism 2, and the feeding barrel mechanism 2 opens the first switch through the electric push rod to make the metal powder enter the hydraulic injection mechanism 10, and the fixed sleeve 582 limits the rotating block 584. Holding the handle 581 can control the rotation of the stirring rod 583, which can accelerate the flow of metal powder inside the feeding barrel mechanism 2 so that it can quickly enter the hydraulic injection mechanism 10 to improve efficiency. The hydraulic injection mechanism 10 first heats the metal and then opens the second switch at the bottom. The metal powder can be injected into the die grooves of the upper module 3 and the lower module 4 through hydraulic push. After the workpiece is formed, the motor 57 is started to drive the rotating shaft 56 to drive the two bevel gears 55 to rotate. Under the meshing transmission between the bevel gears 54, the positioning block 53 plays a limiting role. The two screws 52 can rotate synchronously, and the meshing connection between the screw 52 and the threaded tube 51 can drive the lower module 4 to move downward. The single motor 57 replaces the double hydraulic cylinder drive to fully reduce the cost of the device. The ejector rod in the demolding mechanism 7 can eject the workpiece to complete the demolding. The electric push rod on the side of the lifting frame 9 can push and push to complete automatic unloading, pull the plug rod 84 to separate from the slot 81, and then the upper module 3 and the lower module 4 can be disassembled and replaced with different modules, so that the applicability of this metal injection molding mechanism for powder metallurgy is higher, and under the elastic force of the spring 83 inside the side seat 85 on the sleeve block 82, the plug rod 84 and the slot 81 are tightly plugged together to make the module firmly installed.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal injection molding mechanism for powder metallurgy, comprising a fixing seat, characterized in that: A hydraulic shooting mechanism is installed on the side of the fixed seat, a feeding cylinder mechanism is arranged on the side of the hydraulic shooting mechanism, a pressure-stabilizing piston is installed on the top of the feeding cylinder mechanism, an upper module is embedded in the bottom of the hydraulic shooting mechanism, a lifting component is embedded in the interior of the fixed seat, a lifting frame is connected to the top of the lifting component, a lower module is embedded in the interior of the lifting frame, replacement components are installed on the sides of the lifting frame and the sides of the hydraulic shooting mechanism, and a demoulding mechanism is arranged on the top of the fixed seat.

2. A metal injection molding mechanism for powder metallurgy according to claim 1, characterized in that: The lifting assembly includes a threaded barrel, a screw, bevel gear 1, bevel gear 2, a rotating shaft, a motor and an auxiliary assembly, wherein two screws are embedded in the interior of the fixed seat, the bottom end of the screw is connected to bevel gear 1, a motor is arranged on the side of the fixed seat, the side of the motor is connected to the rotating shaft, the surface of the rotating shaft is sleeved with two bevel gears 2, two threaded barrels are connected to the bottom of the lifting frame, an auxiliary assembly is embedded in the interior of the pressure-stabilizing piston, and the sides of bevel gear 1 and bevel gear 2 are meshed with each other.

3. A metal injection molding mechanism for powder metallurgy according to claim 2, characterized in that: A positioning block is sleeved on the surface of the screw rod inside the fixing seat, and the positioning block is in a circular ring structure. The second bevel gear is located on the same side as the corresponding meshing bevel gear one.

4. A metal injection molding mechanism for powder metallurgy according to claim 2, characterized in that: The auxiliary component includes a handle, a fixed sleeve, a rotating block and a stirring rod, wherein the rotating block is embedded in the pressure-stabilizing piston, the top of the rotating block is connected to the stirring rod, the top of the stirring rod is connected to the handle, and the top of the pressure-stabilizing piston is provided with a fixed sleeve.

5. The metal injection molding mechanism for powder metallurgy according to claim 1, characterized in that: The replacement component includes a slot, a sleeve block, a spring, an insertion rod and a side seat, wherein side seats are installed on both sides of the lifting frame and on both sides of the bottom end of the pressure-stabilizing piston, the insertion rod is embedded in the inside of the side seat, the sleeve block is sleeved on the surface of the insertion rod, and the outside of the sleeve block is installed with a spring, and slots are opened on both sides of the lower module and the upper module.

6. A metal injection molding mechanism for powder metallurgy according to claim 5, characterized in that: The insertion rod and the slot are of plug-in type structure, and the lower module and the lifting frame as well as the upper module and the hydraulic injection mechanism are of split type structure.

Images