Machining forming equipment for powder metallurgy stainless steel product

Abstract

The invention relates to the technical field of powder metallurgy, in particular to powder metallurgy stainless steel product machining forming equipment which comprises a workbench, an injection molding mechanism, a mold closing oil cylinder, a left mold frame and a right mold frame and further comprises a fixed mold plate, a movable mold plate, an ejection assembly, a transmission assembly and a sealing assembly. By arranging the ejection assembly and the sealing assembly, after the cavity is filled with raw materials, the ejection assembly can drive the sealing assembly to move through the transmission assembly, so that a communicating channel of a sprue and the cavity is sealed, the problem of sprue residues of a shaped green body is solved, the cutting step is not needed, and abrasion to a cutter can be avoided; the production efficiency is improved while the cost is reduced, and meanwhile, the raw materials in the pouring gate can be kept in a molten state for next use, so that the waste of the materials is avoided.

Description

Technical Field

[0001] This invention relates to the field of powder metallurgy technology, specifically to a machining and forming equipment for powder metallurgy stainless steel products. Background Technology

[0002] Stainless steel products manufactured using powder metallurgy possess excellent mechanical properties and superior corrosion resistance, making them widely applicable in precision instruments, medical devices, and many other fields. The primary manufacturing process is metal injection molding (MIM), which, with its ability to efficiently mold complex structures, has become the mainstream process in the manufacture of powder metallurgy stainless steel products. In the MIM process, the green blank after injection molding needs to undergo debinding and sintering processes to achieve final solidification. However, the gate, as the channel through which molten metal is injected into the mold cavity, will form residual protrusions on the surface of the green blank. These areas that need to be treated are called gate residues (such as...). Figure 1 (As shown), this affects the dimensional accuracy and surface quality of the product.

[0003] In traditional processes, removing gate residue requires machining methods such as milling and turning before or after sintering. However, during the sintering process, stainless steel precipitates high-hardness carbide particles (such as Cr23C6 and TiC), whose hardness far exceeds that of conventional cutting tools. Therefore, when cutting away gate residue, the friction between the carbide particles and the tool edge can easily cause chipping and wear, reducing tool life and increasing production costs. Simultaneously, tool wear increases cutting forces, easily creating burrs or microcracks on the removed surface of the product. This not only affects product quality but, in severe cases, may require a secondary polishing process to correct machining defects, significantly impacting production efficiency.

[0004] To address the aforementioned issues, existing improvement solutions primarily focus on upgrading tool materials (such as using CBN-coated tools) or optimizing cutting parameters (such as reducing spindle speed). However, while upgrading tool materials can improve tool wear resistance to some extent, it significantly increases the cost per part; and optimizing cutting parameters often comes at the cost of sacrificing machining efficiency. Furthermore, none of these solutions fundamentally solve the physical damage mechanism caused by direct contact between carbides and the tool.

[0005] Therefore, a machining forming equipment for powder metallurgy stainless steel products is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a machining forming equipment for powder metallurgy stainless steel products. This equipment solves the problem in traditional forming processes where the material properties affect the tool life when removing gate residue, thus reducing production efficiency and increasing costs. By cooperating with the ejector component and the sealing component, the connection channel between the gate and the cavity is closed by the sealing component after the raw material is filled into the cavity. This eliminates the need for cutting steps after the green blank is shaped, reducing costs and improving production efficiency. At the same time, the raw material in the gate is kept in a molten state for the next use, avoiding material waste.

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

[0008] A machining forming device for powder metallurgy stainless steel products includes a worktable, an injection molding mechanism, a mold closing cylinder, a left mold frame, and a right mold frame. It also includes a fixed mold plate, a movable mold plate, an ejection assembly, a transmission assembly, and a closing assembly. The fixed mold plate is connected to the right mold frame, and the movable mold plate is connected to the left mold frame. The ejection assembly and the closing assembly are both connected to the fixed mold plate. The transmission assembly is located within the fixed mold plate and cooperates with the ejection assembly and the closing assembly. A gate is provided within the fixed mold plate, and cavities are provided within both the fixed and movable mold plates. The mold closing cylinder pushes the movable mold plate to the right to close with the fixed mold plate, and also moves the closing assembly to the right, thereby connecting the gate and the cavity. Raw material is injected into the cavity from the gate and pushes the ejection assembly to the right. After the ejection assembly moves to a designated position, it drives the closing assembly to the left via the transmission assembly, disconnecting the connection between the gate and the cavity. After the raw material cools and solidifies into a green blank, the mold closing cylinder pushes the movable mold plate to the left, and simultaneously the ejection assembly moves to the left, ejecting the green blank from the cavity.

[0009] In traditional injection molding, after molten material is injected into the cavity, there is a cooling and solidification process. During this cooling process, the material shrinks in volume, so it is necessary to maintain communication between the gate and the cavity. When the material in the cavity cools and shrinks and cannot fill the cavity completely, some material from the gate will be squeezed back into the cavity to replenish it. This makes it impossible to separate the gate and the cavity in advance, so the only way to remove the gate residue is to add an additional cutting process. In contrast, this solution modifies the size of the cavity based on the volume change during material cooling and shrinkage. At the same time, by setting an ejector component in the cavity, the ejector component can provide a certain amount of material injected into the cavity. The pressure compresses the molten material and constantly withstands the pressure of the ejector assembly during its cooling and shrinkage process. This prevents surface dents or internal voids from appearing on the cooled and shaped green blank, making the green blank more compact and improving product quality. On the other hand, when the ejector assembly moves under the pressure of the raw material, it drives the closing assembly to move through the transmission assembly, separating the gate and the cavity. This allows the gate to be cut off before the raw material cools and solidifies into a green blank, preventing the formation of gate residue that needs to be removed after molding. This avoids damage to the cutting tools, thereby reducing production costs, and also eliminates the need for cutting processes, thus improving production efficiency.

[0010] Preferably, the moving template and the fixed template are provided with a sealing edge on one side of their adjacent edges, and the sealing edge is made of a flexible material.

[0011] Through the above solution, the flexible material sealing edge can not only provide a certain buffering capacity when the mold is closed, ensuring the service life of the moving and fixed mold plates, but also enhance the sealing effect and ensure product quality.

[0012] Preferably, the fixed template is located on the right side of the cavity and has an installation cavity, which has multiple air inlet holes.

[0013] With the above solution, when the ejector component moves to the right due to the pressure of the raw material, it will compress the space inside the cavity. Therefore, setting an air inlet hole can balance the pressure inside the cavity and ensure the performance.

[0014] Preferably, the ejection assembly includes a push plate, a push rod, a fixed plate, and a compression spring. The push plate is slidably connected inside the cavity, the push rod is connected to the right side of the push plate, the fixed plate is disposed inside the mounting cavity and connected to the push rod, and the compression spring is sleeved on the push rod, with its two ends respectively connected to the inner wall of the mounting cavity and the fixed plate.

[0015] With the above scheme, after the raw material is injected into the cavity, it will squeeze the push plate and provide a counter-push force through the compression spring, thereby providing a certain pressure for the raw material injected into the cavity, making the green blank more compact after cooling and solidification, thus improving product quality and ensuring injection molding effect; when the green blank cools down, the moving platen and the fixed platen separate, and at this time the push platen pushes the green blank out of the cavity under the action of the compression spring.

[0016] Preferably, the transmission assembly includes a first ratchet plate, a ratchet wheel, and a second ratchet plate. The first ratchet plate is connected to a fixed plate, the ratchet wheel is connected to the inner wall of the mounting cavity, and the second ratchet plate is connected to a sealing assembly. The ratchet wheel has two types of teeth in opposite directions.

[0017] With the above scheme, when the push plate moves the fixed plate to the right, it will drive the ratchet to rotate through the first ratchet plate, which in turn drives the closing component to move through the second ratchet plate. When the moving template and the fixed template are separated, the push plate moves to the left to push out the green blank. At this time, the first ratchet plate separates from the ratchet, so that the movement of the closing component cannot affect the movement of the push plate.

[0018] Preferably, the sealing assembly includes a sealing plate, which is connected to a fixed template and a ratchet plate. The width of the sealing plate is the same as the width of the gate, and the sealing plate is made of heat-insulating material.

[0019] With the above solution, after the raw material is injected into the mold cavity, the gate is isolated from the cavity by a sealing plate. Utilizing its heat insulation properties, the temperature of the raw material inside the gate is maintained, thus keeping it in a molten state for subsequent use. This prevents the raw material from cooling and solidifying along with the green body, becoming gate residue that is then cut off, thereby avoiding waste of raw material. In addition, the material of the sealing plate can also prevent heat from being transferred into the mold cavity, thereby ensuring the cooling and solidification speed of the green body and ensuring production efficiency.

[0020] Preferably, the enclosure assembly further includes a connecting frame, a connecting rod, a tension spring, a connecting plate, a first locking block, a second locking block, and a return spring. The connecting frame is connected to the sealing plate, the connecting rod is connected to the connecting frame, the connecting plate is connected to the connecting rod, the two ends of the tension spring are respectively connected to the connecting plate and the fixed template, the first locking block is connected to the connecting plate, the second locking block is connected to the fixed template, and the two ends of the return spring are respectively connected to the second locking block and the fixed template. The right side of the moving template is provided with a hinge rod and a top rod. The hinge rod is connected to the moving template, and the top rod is connected to the end of the hinge rod. The hinge rod is annular. The left side of the second locking block is provided with a baffle, and the bottom of the baffle is provided with an arc-shaped chamfer.

[0021] With the above scheme, when the sealing plate moves to the left, it will drive the first locking block to move to the left and engage with the second locking block, thereby fixing the position of the sealing plate and keeping it in a closed state. When the next injection molding is required, the moving mold plate moves to the right and fits against the fixed mold plate. At this time, the ejector rod will drive the second locking block to move upward through the baffle, separating it from the first locking block. At this time, the first locking block will rebound under the action of the tension spring, thereby reconnecting the gate and the cavity. After the ejector rod drives the second locking block to rise to the designated position, it will retract into the moving mold plate, so that the second locking block can be reset under the action of the return spring.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. The present invention provides a machining forming equipment for powder metallurgy stainless steel products. By setting an ejector component and a sealing component, when the cavity is filled with raw material, the ejector component will drive the sealing component to move through the transmission component, thereby sealing the communication channel between the gate and the cavity. This eliminates the problem of gate residue after the green blank is shaped, thus eliminating the need for a cutting step and avoiding wear on the cutting tools. This reduces costs and improves production efficiency. At the same time, the raw material in the gate can remain in a molten state for the next use, thereby avoiding material waste.

[0024] 2. The present invention provides a machining forming equipment for powder metallurgy stainless steel products. By setting a pusher plate, during the injection of raw materials, the gradually increasing raw materials will fill the space in the cavity and squeeze the pusher plate to move. During the movement of the pusher plate, it will provide a counter-pushing force under the action of the compression spring, thereby pressing the raw materials more compactly and avoiding surface dents or internal voids in the green blank after cooling and solidification, thus improving product quality. On the other hand, when the green blank needs to be demolded after cooling and solidification, the moving template opens and the pusher plate can also provide a demolding pushing force for the green blank under the action of the compression spring.

[0025] 3. The present invention provides a machining forming equipment for powder metallurgy stainless steel products. By setting a sealing plate, after the raw material in the cavity is filled, the sealing plate will move to the left to isolate the gate from the cavity. Because the sealing plate has heat insulation properties, it can maintain the temperature of the raw material in the gate, keeping it in a molten state for reuse. At the same time, it can also prevent the formation of gate residue on the green blank, eliminating the cutting process, improving production efficiency, and avoiding material waste. On the other hand, the heat insulation properties of the sealing plate can also prevent the heat in the gate from being transferred to the cavity, thereby ensuring the cooling and shaping speed of the green blank and ensuring production efficiency. Attached Figure Description

[0026] Figure 1 A schematic diagram of gate residue in a preform produced by traditional injection molding.

[0027] Figure 2This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the fixed template and the moving template being bonded together according to the present invention;

[0029] Figure 4 This is a schematic diagram of a half-section of the template of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the moving template of the present invention;

[0031] Figure 6 This is a structural diagram illustrating the location of the template cavity and gate, as well as the installation location of the ejector assembly, according to the present invention.

[0032] Figure 7 This is a schematic diagram showing the installation relationship between the ejector assembly, transmission assembly, and sealing assembly of the present invention;

[0033] Figure 8 This is a schematic diagram showing the installation relationship between the ejector assembly and the transmission assembly of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the enclosed component of the present invention;

[0035] Figure 10 For the present invention Figure 5 A magnified view of point A;

[0036] Figure 11 For the present invention Figure 6 Enlarged view of point B.

[0037] In the diagram: 1. Workbench; 2. Injection molding mechanism; 3. Mold closing cylinder; 4. Left mold base; 5. Right mold base; 6. Fixed mold plate; 7. Moving mold plate; 8. Ejection assembly; 801. Push plate; 802. Push rod; 803. Fixed plate; 804. Compression spring; 9. Transmission assembly; 901. Ratchet 1; 902. Ratchet; 903. Ratchet 2; 10. Sealing assembly; 1001. Sealing plate; 1002. Connecting frame; 1003. Connecting rod; 1004. Tension spring; 1005. Connecting plate; 1006. Locking block 1; 1007. Locking block 2; 1008. Return spring; 11. Gate; 12. Cavity; 13. Sealing edge; 14. Mounting cavity; 15. Air vent; 16. Hinge rod; 17. Ejector rod; 18. Baffle. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 11 The present invention provides a technical solution as follows:

[0040] For details, please refer to Figures 2 to 7 A machining forming device for powder metallurgy stainless steel products includes a worktable 1, an injection molding mechanism 2, a mold clamping cylinder 3, a left mold frame 4, and a right mold frame 5. The injection molding mechanism 2 is mounted on the worktable 1. The mold clamping cylinder 3 is fixed to the left side of the worktable 1. The left mold frame 4 and the right mold frame 5 are both fixed on the worktable 1. The left mold frame 4 is connected to the mold clamping cylinder 3, and the right mold frame 5 is connected to the injection molding mechanism 2. The device also includes a fixed template 6, a movable template 7, an ejection assembly 8, a transmission assembly 9, and a closing assembly 10. The fixed template 6 is fixedly connected to the right mold frame 5, and the movable template 7 is connected to the left mold frame 4. The movable template 7 can be connected to the mold clamping cylinder 5. Driven by 3, the moving template 7 and the fixed template 6 move left and right. The adjacent edge of the moving template 7 and the fixed template 6 is provided with a sealing edge 13. The sealing edge 13 is made of rubber. This material can provide a certain buffering capacity when the mold is closed, ensuring the service life of the moving template 7 and the fixed template 6, and can also enhance the sealing effect to ensure product quality. The fixed template 6 is located on the right side of the cavity 12 and is also provided with an installation cavity 14. The installation cavity 14 is provided with multiple air inlet holes 15. When the ejector component 8 is squeezed to the right by the raw material, it will squeeze the space in the cavity 12. Therefore, the air inlet holes 15 can balance the pressure in the cavity 12 and ensure the use effect.

[0041] The ejector assembly 8 and the closing assembly 10 are both connected to the fixed mold plate 6. The transmission assembly 9 is disposed within the fixed mold plate 6 and cooperates with the ejector assembly 8 and the closing assembly 10. The fixed mold plate 6 has a gate 11. Both the fixed mold plate 6 and the moving mold plate 7 have cavities 12. The mold closing cylinder 3 pushes the moving mold plate 7 to the right to close with the fixed mold plate 6. Raw material is injected into the cavity 12 and pushes the ejector assembly 8 to the right. The ejector assembly 8 can provide a certain pressure during the injection of raw material into the cavity 12, making the cooled and shaped green blank more compact and improving product quality. When the ejector assembly 8 is moved by the pressure of the raw material, the ejector assembly 8 moves to a designated position. Then, the transmission component 9 drives the closing component 10 to move to the left, disconnecting the connection between the gate 11 and the cavity 12. This cuts off the gate 11 before the raw material cools and solidifies into a blank, preventing the formed blank from having gate 11 residue. This avoids damaging the cutting tools, reducing production costs, and also eliminates the cutting process, thus improving production efficiency. After the raw material cools and solidifies into a blank, the mold closing cylinder 3 pushes the moving platen 7 to the left, while the ejector component 8 moves to the left and pushes the blank out of the cavity 12. During the next injection molding, the mold closing cylinder 3 pushes the moving platen 7 to the right to close with the fixed platen 6, and causes the closing component 10 to move to the right, thereby reconnecting the gate 11 and the cavity 12.

[0042] As one embodiment of the present invention, refer to Figures 7 to 8 The ejection assembly 8 includes a push plate 801, a push rod 802, a fixed plate 803, and a compression spring 804. The push plate 801 is slidably connected inside the cavity 12. After the raw material is injected into the cavity 12, it will squeeze the push plate 801, causing it to move to the right. The push rod 802 is connected to the right side of the push plate 801. The fixed plate 803 is located inside the mounting cavity 14 and connected to the push rod 802. The compression spring 804 is sleeved on the push rod 802, and its two ends are respectively connected to the inner wall of the mounting cavity 14 and the fixed plate 803. When the raw material is injected, the compression spring 804 provides a counter-push force, thereby providing a certain pressure to the raw material injected into the cavity 12, making the green blank more compact after cooling and solidification, thereby improving product quality and ensuring injection molding effect. When the green blank cools down, the moving mold plate 7 separates from the fixed mold plate 6. At this time, under the action of the compression spring 804, the push plate 801 pushes the green blank out of the cavity 12.

[0043] As one embodiment of the present invention, refer to Figures 7 to 8The transmission assembly 9 includes a ratchet plate 901, a ratchet wheel 902, and a second ratchet plate 903. Both ratchet plate 901 and second ratchet plate 903 have unidirectional teeth, and both tooth directions are set to the right. The teeth of ratchet plate 901 are distributed on the front and rear sides of ratchet plate 901, while the teeth of ratchet plate 903 are distributed in the middle. The ratchet wheel 902 has two types of teeth with opposite directions. From the front viewing angle, the teeth in the middle of ratchet wheel 902 are set counterclockwise so that they can engage with the teeth of ratchet plate 903, while the teeth on the front and rear sides of ratchet wheel 902 are set clockwise so that they can engage with the ratchet wheel 903. The teeth of plate 901 engage. When the push plate 801 moves the fixed plate 803 to the right, it drives the ratchet 902 to rotate through the ratchet plate 901, which in turn drives the closing assembly 10 to move through the ratchet plate 903. When the moving template 7 and the fixed template 6 separate, the push plate 801 moves to the left to push out the green blank. At this time, the ratchet plate 901 moves to the left with the push plate 801 and separates from the ratchet 902, so that the movement of the closing assembly 10 cannot affect the movement of the push plate 801. The ratchet plate 901 is connected to the fixed plate 803, the ratchet 902 is connected to the inner wall of the mounting cavity 14, and the ratchet plate 903 is connected to the closing assembly 10.

[0044] As one embodiment of the present invention, refer to Figures 8 to 11The sealing assembly 10 includes a sealing plate 1001, which is connected to the fixed template 6. The lower side of the sealing plate 1001 is connected to the ratchet plate 903. The width of the sealing plate 1001 is the same as the width of the gate 11. The sealing plate 1001 is made of titanium alloy, which, through its heat insulation properties, can maintain the temperature of the raw material inside the gate 11 and prevent heat transfer to the cavity 12, thereby ensuring the cooling and shaping speed of the green body and ensuring production efficiency. The sealing assembly 10 also includes a connecting... The system comprises a connecting frame 1002, a connecting rod 1003, a tension spring 1004, a connecting plate 1005, a locking block 1006, a locking block 1007, and a return spring 1008. The connecting frame 1002 is connected to the sealing plate 1001, and the connecting rod 1003 is connected to the connecting frame 1002. When the sealing plate 1001 moves to the left, it will cause the locking block 1006 to move to the left and engage with the locking block 1007, thereby fixing the position of the sealing plate 1001 and keeping it in a closed state. The connecting plate 1005... 005 is connected to connecting rod 1003. The two ends of tension spring 1004 are connected to connecting plate 1005 and fixed template 6 respectively. Clamping block 1006 is connected to connecting plate 1005. Clamping block 2 1007 is connected to fixed template 6. The two ends of return spring 1008 are connected to clamping block 2 1007 and fixed template 6 respectively. The right side of moving template 7 is provided with hinge rod 16 and top rod 17. Hinged rod 16 is connected to moving template 7. Top rod 17 is connected to the end of hinge rod 16. The hinge rod 16 is annular, with the outer ring being the side closest to the fixed template 6. The second locking block 1007 has a baffle 18 on its left side, and the bottom of the baffle 18 has an arc-shaped chamfer. When the next injection molding is required, the moving template 7 moves to the right and fits against the fixed template 6. At this time, the push rod 17 will drive the second locking block 1007 to move upward through the baffle 18, so that it separates from the first locking block 1006. At this time, the first locking block 1006 rebounds under the action of the tension spring 1004, thereby reconnecting the gate 11 and the cavity 12.

[0045] The specific working principle is as follows: First, the moving platen 7 is moved to the right and fits against the fixed platen 6 by the mold closing cylinder 3. Then, the injection mechanism 2 injects the raw material into the cavity 12 through the gate 11. During this process, the raw material gradually squeezes the ejector component 8 in the cavity 12. At the same time, the ejector component 8 provides a counter-push force to make the raw material more compact. When the raw material is full, the sealing component 10 will block the channel between the gate 11 and the cavity 12, thereby eliminating the cutting process of the cooled and shaped blank and avoiding material waste. After the blank has cooled down, the mold closing cylinder 3 drives the moving platen 7 away from the fixed platen 6, and at the same time, the ejector component 8 pushes the blank out of the cavity 12.

[0046] Specifically, after the moving mold plate 7 and the fixed mold plate 6 are closed, the injection molding mechanism 2 injects the raw material into the cavity 12 through the gate 11. As the raw material is injected, the push plate 801 in the cavity 12 is pushed to the right by the raw material. At the same time, under the action of the compression spring 804, the push plate 801 provides a certain degree of counter-push force for the raw material continuously injected into the cavity 12, making it more compact and thus improving product quality. During the process of the push plate 801 moving to the right, the push plate 801 will drive the sealing plate 1001 to move to the left through the ratchet plate 901, ratchet 902 and ratchet plate 903. When the raw material in the cavity 12 is full, the push plate 801 will push the sealing plate 1001 to the designated position, thereby separating the gate 11 and the cavity 12. At this time, it is only necessary to wait for the raw material in the cavity 12 to cool and solidify.

[0047] During the above process, when the sealing plate 1001 moves to the left to separate the gate 11 and the cavity 12, the sealing plate 1001 will drive the first locking block 1006 to move to the left through the connecting frame 1002, the connecting rod 1003 and the connecting plate 1005. The first locking block 1006 moves to the left and contacts the second locking block 1007 and pushes the second locking block 1007 upward. When the sealing plate 1001 moves to the designated position, the first locking block 1006 just passes the second locking block 1007. At this time, the second locking block 1007 moves down under the action of the return spring 1008 and locks the first locking block 1006, thereby restricting its movement and ensuring the function of the sealing plate 1001 in separating the gate 11 and the cavity 12.

[0048] After completing the above steps, the moving template 7 and the fixed template 6 are separated by the mold closing cylinder 3. At this time, under the action of the compression spring 804, the push plate 801 will move to the left and push the cooled and shaped green blank out of the cavity 12.

[0049] During the next injection molding operation, the moving platen 7 is still moved to the right by the mold clamping cylinder 3. As the moving platen 7 approaches the fixed platen 6, the ejector rod 17 connected to the right side of the moving platen 7 will be stuck at the baffle 18 on the left side of the second clamping block 1007. As the moving platen 7 moves to the right, the annular hinge rod 16 will abut against the surface of the fixed platen 6, and then drive the ejector rod 17 to gradually rotate towards the moving platen 7. The ejector rod 17 also rises continuously during the rotation process with the hinge rod 16, thus lifting the second clamping block 1007. Before the moving platen 7 and the fixed platen 6 are completely attached, the second clamping block 1007 is separated from the first clamping block 1006 under the action of the ejector rod 17. At this time, the first clamping block 1006 rebounds to the right under the action of the tension spring 1004, thereby driving the sealing plate 1001 to move to the right, so that the gate 11 and the cavity 12 are connected again. At this time, the raw material in the gate 11 is injected into the cavity 12, and the above steps are repeated.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machining forming equipment for powder metallurgy stainless steel products, comprising a worktable (1), an injection molding mechanism (2), a mold clamping cylinder (3), a left mold frame (4), and a right mold frame (5), characterized in that: It also includes a fixed template (6), a moving template (7), an ejector assembly (8), a transmission assembly (9), and a closing assembly (10). The fixed template (6) is connected to the right mold frame (5), the moving template (7) is connected to the left mold frame (4), the ejector assembly (8) and the closing assembly (10) are both connected to the fixed template (6), the transmission assembly (9) is located inside the fixed template (6) and cooperates with the ejector assembly (8) and the closing assembly (10), the fixed template (6) has a gate (11), and both the fixed template (6) and the moving template (7) have cavities (12); the mold closing cylinder (3) The moving template (7) is pushed to the right to close with the fixed template (6), and the closing component (10) is moved to the right to connect the gate (11) and the cavity (12). The raw material is injected into the cavity (12) from the gate (11) and pushes the ejector component (8) to the right. After the ejector component (8) moves to the designated position, it drives the closing component (10) to the left through the transmission component (9) and disconnects the connection between the gate (11) and the cavity (12). After the raw material cools and solidifies into a blank, the mold closing cylinder (3) pushes the moving template (7) to the left, and at the same time the ejector component (8) moves to the left and pushes the blank out of the cavity (12).

2. The machining and forming equipment for powder metallurgy stainless steel products according to claim 1, characterized in that: The moving template (7) and the fixed template (6) are provided with a sealing edge (13) on one side of their adjacent edges, and the sealing edge (13) is made of a flexible material.

3. The machining and forming equipment for powder metallurgy stainless steel products according to claim 1, characterized in that: The fixed template (6) is located on the right side of the cavity (12) and has an installation cavity (14) with multiple air inlet holes (15) inside.

4. The machining and forming equipment for powder metallurgy stainless steel products according to claim 3, characterized in that: The ejection assembly (8) includes a push plate (801), a push rod (802), a fixing plate (803), and a compression spring (804). The push plate (801) is slidably connected in the cavity (12). The push rod (802) is connected to the right side of the push plate (801). The fixing plate (803) is located in the mounting cavity (14) and connected to the push rod (802). The compression spring (804) is sleeved on the push rod (802), and its two ends are respectively connected to the inner wall of the mounting cavity (14) and the fixing plate (803).

5. The machining and forming equipment for powder metallurgy stainless steel products according to claim 4, characterized in that: The transmission assembly (9) includes a first ratchet plate (901), a ratchet wheel (902), and a second ratchet plate (903). The first ratchet plate (901) is connected to the fixed plate (803), the ratchet wheel (902) is connected to the inner wall of the mounting cavity (14), and the second ratchet plate (903) is connected to the sealing assembly (10). The ratchet wheel (902) is provided with two types of teeth in opposite directions.

6. The machining and forming equipment for powder metallurgy stainless steel products according to claim 5, characterized in that: The sealing assembly (10) includes a sealing plate (1001), which is connected to the fixed template (6). The lower side of the sealing plate (1001) is connected to the second ratchet plate (903). The width of the sealing plate (1001) is the same as the width of the gate (11). The sealing plate (1001) is made of heat-insulating material.

7. The machining and forming equipment for powder metallurgy stainless steel products according to claim 6, characterized in that: The enclosure assembly (10) further includes a connecting frame (1002), a connecting rod (1003), a tension spring (1004), a connecting plate (1005), a first locking block (1006), a second locking block (1007), and a return spring (1008). The connecting frame (1002) is connected to the sealing plate (1001), the connecting rod (1003) is connected to the connecting frame (1002), the connecting plate (1005) is connected to the connecting rod (1003), the two ends of the tension spring (1004) are connected to the connecting plate (1005) and the fixed template (6) respectively, the first locking block (1006) is connected to the connecting plate (1005), the second locking block (1007) is connected to the fixed template (6), and the two ends of the return spring (1008) are connected to the second locking block (1007) and the fixed template (6) respectively.

8. The machining and forming equipment for powder metallurgy stainless steel products according to claim 7, characterized in that: The moving template (7) is provided with a hinge rod (16) and a top rod (17) on the right side. The hinge rod (16) is connected to the moving template (7), and the top rod (17) is connected to the end of the hinge rod (16). The hinge rod (16) is annular. The second locking block (1007) is provided with a baffle (18) on the left side. The bottom of the baffle (18) is provided with an arc chamfer.

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