A powder metallurgy injection molding die

Abstract

The utility model discloses a kind of powder metallurgy injection molding mould, including bottom plate, material pushing assembly, backing plate, B plate, A plate, top plate setting in sequence;It further includes forming assembly and a group of auxiliary assembly;Forming assembly includes lower die, upper die and die core;Lower die and upper die are respectively arranged on B plate and A plate, and die core is arranged in the cavity formed by the closure of both;Auxiliary assembly is arranged on both sides of forming assembly;Auxiliary assembly includes a group of guide block and locking slider;Guide block is arranged between lower die and upper die;Locking slider is arranged between guide block;Locking slider is provided with lock block at one end near die core;Die core is correspondingly provided with the opening of lock block on it.The powder metallurgy injection molding mould of the application, by the setting of locking slider in auxiliary assembly, the design of lock block at its one end cooperates with the opening on die core, ensure that die core does not appear to deviate in powder metallurgy injection process.

Description

Technical Field

[0001] This utility model belongs to the field of powder metallurgy injection molding, and specifically relates to a powder metallurgy injection molding die. Background Technology

[0002] In powder metallurgy injection molding, the feedstock is a mixture of metal powder and binder. For feedstocks with high viscosity, a large injection pressure is required during the injection process to push it into the mold cavity. However, excessively high injection pressure can generate a large lateral force on the mold core, which can easily cause the mold core to slide or shift during injection, leading to the following problems.

[0003] First, core slippage can compromise the dimensional accuracy and shape integrity of the molded parts, leading to decreased molding quality, dimensional deviations, surface defects, and other issues that prevent the product from meeting design requirements, thus increasing the reject rate. Second, core instability can also damage the internal structure of the mold, such as increased clearance between the core and the mold cavity, or loosening or even breakage at the connection between the core and the mold, thereby affecting the mold's lifespan and increasing maintenance and replacement costs. Furthermore, core slippage can also cause problems such as incomplete injection and uneven filling, further reducing production efficiency and impacting production schedules.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a powder metallurgy injection molding die. By setting a locking slider in the auxiliary components, the locking block at one end, in conjunction with the opening design on the mold core, ensures that the mold core will not shift during the powder metallurgy injection process. At the same time, by setting a buffer groove and a guide groove on the lower mold core, a stable injection rate is ensured, so that the feed can stably and evenly fill the product molding cavity, thus ensuring production quality.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a powder metallurgy injection molding die, comprising: a base plate, a backing plate, an ejector assembly, a B plate, an A plate, a molding assembly, a set of auxiliary components, and a top plate; the backing plate is disposed on the base plate; the ejector assembly is disposed between the base plate and the backing plate; the B plate and the A plate are sequentially disposed on the backing plate; the molding assembly is disposed between the B plate and the A plate; the molding assembly includes a lower mold core, an upper mold core, and a mold core; the lower mold core and the upper mold core are respectively disposed on the B plate and the A plate, and each cavity formed by their closure contains a mold core; the mold core and the lower mold core... A product forming cavity is formed between the mold cores; the auxiliary components are located on both sides of the forming component; the auxiliary components include a set of guide blocks and a locking slider; the guide blocks are located between the lower mold core and the upper mold core; the locking slider is located between the guide blocks; the locking slider is located on one side of the mold core and is laterally guided by the guide blocks; a locking block is provided at the end of the locking slider near the mold core; the mold core is provided with corresponding openings for the locking blocks; the locking slider can slide laterally so that the locking blocks are inserted into the openings on the mold core to achieve the locking operation; the top plate is located on the A plate; the top plate is also provided with an injection port.

[0007] Furthermore, the locking block on the locking slider, in conjunction with the opening on the mold core, effectively stabilizes the mold core and reduces defects such as uneven filling, air bubbles, and shrinkage cavities that may occur during the molding process, ensuring the dimensional accuracy and surface quality of the molded parts. Simultaneously, the guide block, located between the lower and upper mold cores, provides lateral guidance for the locking slider, enabling it to slide smoothly and accurately, ensuring the speed and reliability of the locking operation, thereby improving the mold's production efficiency. The ejector assembly, located between the base plate and the backing plate, facilitates the ejection of the product from the mold after molding, reducing manual operation, improving production efficiency, and also lowering the risk of product damage during demolding.

[0008] Furthermore, a buffer groove is provided in the middle of the lower mold core; inclined guide slots are provided on both sides of the buffer groove; the guide slots guide to the product molding cavity formed between the mold core and the lower mold core. The buffer groove can effectively absorb the impact force generated during injection. At the same time, the buffer groove, together with the guide slots, ensures uniform filling of the feed, reduces defects that may occur during the molding process, thereby reducing the defect rate and improving production efficiency.

[0009] Furthermore, the ejector assembly includes a set of square irons, a set of ejector plates, and several ejector pins; the square irons are disposed on both sides of the base plate; the ejector plates are sequentially disposed on the base plate and located between the square irons; the ejector pins are erected on the ejector plates; the ejector pins sequentially pass through the backing plate, the B plate, and the lower mold core, with their top ends flush with the upper surface of the lower mold core. During ejection, the ejector plates provide a stable and uniform force to each ejector pin, avoiding damage caused by excessive localized force. Simultaneously, the design of the ejector pin top positions ensures that the ejector plates can accurately act on the predetermined position of the molded part during ejection, preventing damage or deformation of the molded part due to positional deviations.

[0010] Furthermore, a handle is provided at the end of the locking slider away from the mold core. The handle provides a grip for the lateral movement of the locking slider, making its lateral movement more convenient.

[0011] Furthermore, the injection port is aligned with one end of the buffer groove to ensure that the feed can accurately enter the buffer groove for subsequent molding.

[0012] Furthermore, locking latches are provided on the sides of plates B and A. These latches ensure that plates B and A will not open during injection molding, thus guaranteeing processing stability.

[0013] Furthermore, both plate B and plate A are provided with cooling water channels. These cooling water channels provide molding cooling for injection molding.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] 1. This utility model provides a powder metallurgy injection molding die. By setting a locking slider in the auxiliary components, the locking block at one end of the slider, in conjunction with the opening design on the mold core, ensures that the mold core will not shift during the powder metallurgy injection process.

[0016] 2. This utility model provides a powder metallurgy injection molding die. By setting up a buffer groove and a guide groove on the lower mold core, a stable injection rate is ensured, so that the feed material can stably and evenly fill the product molding cavity, thus ensuring production quality. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a powder metallurgy injection molding die according to the present invention;

[0018] Figure 2 This is a top view of a powder metallurgy injection molding die according to the present invention.

[0019] Figure 3 for Figure 2 AA-direction cross section;

[0020] Figure 4This is a schematic diagram of the explosion structure of the molding component and auxiliary component in a powder metallurgy injection molding die according to the present invention.

[0021] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle;

[0022] Figure 6 This is a schematic diagram of the fit between the locking block and the opening in a powder metallurgy injection molding die according to the present invention;

[0023] In the picture:

[0024] 1-Base plate;

[0025] 2-Plate;

[0026] 3-Ejector assembly; 31-Square iron; 32-Ejector plate; 33-Ejector pin;

[0027] 4-B plate; 41-locking buckle;

[0028] 5-A board;

[0029] 6- Molding component; 61- Lower mold core; 62- Upper mold core; 63- Mold core; 611- Buffer groove; 612- Guide slot;

[0030] 7-Auxiliary component; 71-Guide block; 72-Locking slider; 721-Locking block; 722-Opening; 723-Grip;

[0031] 8-Top plate; 81-Injection port;

[0032] 9-Cooling water circuit. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0034] In this embodiment, as Figures 1 to 6This utility model discloses a powder metallurgy injection molding die, including a base plate 1, a backing plate 2, an ejector assembly 3, a B plate 4, an A plate 5, a molding assembly 6, a set of auxiliary components 7, and a top plate 8; the backing plate 2 is disposed on the base plate 1; the ejector assembly 3 is disposed between the base plate 1 and the backing plate 2; the B plate 4 and the A plate 5 are sequentially disposed on the backing plate 2; the molding assembly 6 is disposed between the B plate 4 and the A plate 5; the molding assembly 6 includes a lower mold core 61, an upper mold core 62, and a mold core 63; the lower mold core 61 and the upper mold core 62 are respectively disposed on the B plate 4 and the A plate 5, and both of them have a mold core 63 in a set of cavities formed by their closure; the mold core 63 and the lower mold core 61 form a product molding cavity; the auxiliary components 7 and the top plate 8; the backing plate 2 is disposed on the base plate 1; the ejector assembly 3 is disposed between the base plate 1 and the backing plate 2; the ejector assembly 3 is disposed between the base plate 1 and the backing plate 2; the B plate 4 and the A plate 5 are sequentially disposed on the backing plate 2; the molding assembly 6 is disposed between the B plate 4 and the A plate 5; the molding assembly 6 includes a lower mold core 61, an upper mold core 62, and a top plate 8; the ejector ...2, an upper mold core 62, and a Auxiliary component 7 is located on both sides of molding component 6; the auxiliary component 7 includes a set of guide blocks 71 and locking sliders 72; the guide blocks 71 are located between the lower mold core 61 and the upper mold core 62; the locking sliders 72 are located between the guide blocks 71; the locking sliders 72 are located on one side of the mold core 63 and are laterally guided by the guide blocks 71; a locking block 721 is provided at one end of the locking sliders 72 near the mold core 63; the mold core 63 is provided with corresponding openings 722 for the locking blocks 721; the locking sliders 72 can slide laterally so that the locking blocks 721 are inserted into the openings 722 on the mold core 63 to achieve locking operation; the top plate 8 is located on plate A 5; the top plate 8 is also provided with an injection port 81.

[0035] Specifically, the pad 2 is fixed to the base plate 1 by screws or bolts; mounting holes are machined around the pad 2, and after being aligned with the mounting holes of the base plate 1, it is fixed with screws.

[0036] Specifically, the lower surface of the upper mold core 62 has a slot corresponding to the mold core 63; when the mold is closed, the locking slider 72 is pushed along the guide block 71 toward the mold core 63, so that the locking block 721 on the locking slider 72 is inserted into the opening 722 of the mold core 63, thus stabilizing the mold core 63; the upper mold core 62 presses the mold core 63 from above, and then injects material into the injection port 81 to complete the injection molding.

[0037] Specifically, a set of sealing elements can be added to the inner side of the opening 722 and the periphery of the locking block 721 to ensure the sealing performance between the two; at the same time, a set of bolts that penetrate the upper mold core 62 can be provided on the A plate 5, and a corresponding slot is opened at the upper end of the locking slider 72. When the mold is closed, this bolt is inserted into the slot at the upper end of the locking slider 72, thereby locking the locking slider 72 and preventing the locking slider 72 from popping open due to excessive injection pressure.

[0038] In particular, during the injection process, a horizontal force towards the mold core 63 can be continuously applied to the locking slider 72 to ensure that the locking slider 72 will not spring open due to the injection pressure.

[0039] In this embodiment, as Figure 3 and Figure 4The lower mold core 61 is provided with a buffer groove 611 in the middle; the buffer groove 611 is provided with inclined guide slots 612 on both sides; the guide slots 612 guide to the product forming cavity formed between the mold core 63 and the lower mold core 61.

[0040] Specifically, the horizontal height of the guide slot 612 is higher the farther it is from the buffer groove 611, ensuring that the buffer groove 611 is filled first before the injection is guided by the guide slot 612, thus ensuring the uniformity and stability of the injection pressure.

[0041] In this embodiment, as Figure 1 and Figure 3 The ejector assembly 3 includes a set of square irons 31, a set of ejector plates 32, and a number of ejector pins 33; the square irons 31 are disposed on both sides of the base plate 1; the ejector plates 32 are disposed sequentially on the base plate 1 and are located between the square irons 31; the ejector pins 33 are erected on the ejector plates 32; the ejector pins 33 pass through the pad plate 2, the B plate 4, and the lower mold core 61 in sequence, and the top end is flush with the upper surface of the lower mold core 61.

[0042] Specifically, a spring or cylinder can be installed below the ejector plate 32. The ejection force can be controlled by adjusting the compression of the spring or the pressure of the cylinder. A guide device such as a guide sleeve or guide hole can be set around the ejector pin 33 to ensure that the ejector pin 33 remains vertical during the ejection process.

[0043] In this embodiment, as Figure 1 , Figure 3 and Figure 4 The locking slider 72 is provided with a handle 723 at the end away from the mold core 63.

[0044] Specifically, a cylindrical grip 723 is preferred for ease of holding; at the same time, heat insulation material can be wrapped around its perimeter to prevent heat conduction from affecting operation.

[0045] In this embodiment, the injection port 81 is aligned with one end of the buffer groove 611.

[0046] Specifically, the buffer groove 611 is preferably designed as a rounded rectangle, and a chamfer can be set at the buffer groove 611 directly below the injection port 81 to guide the injected material.

[0047] In this embodiment, as Figure 1 The B plate 4 and the A plate 5 are provided with a latch 41 on their sides.

[0048] Specifically, the following is a feasible solution: the latch 41 includes a protrusion and a locking plate; the protrusion is located on the side of plate B 4; the locking plate is located on the side of plate A 5; the locking plate can rotate around the connection point with plate A 5; the locking plate has a slot corresponding to the protrusion; when locked, plate B 4 and plate A 5 close together, and the locking plate rotates to engage with the corresponding slot on it.

[0049] In this embodiment, as Figure 1 Both plate B4 and plate A5 are equipped with cooling water channels 9.

[0050] Specifically, a serpentine cooling water channel 9 can be designed inside plate B4 and plate A5 to increase the residence time of cooling water in the mold and improve cooling efficiency.

[0051] The working principle of the above embodiments is as follows:

[0052] This utility model discloses a powder metallurgy injection molding die. When the die is closed, the locking block 721 on the locking slider 72 is inserted into the opening 722 by the handle 723 to stabilize the die core 63. The B plate 4 and the A plate 5 are closed. At this time, the lower die core 61 and the upper die core 62 are closed, and then the material is injected into the injection port 81 to complete the injection molding.

[0053] When the mold is opened, plate B4 and plate A5 open, and at this time, the lower mold core 61 and the upper mold core 62 open; the locking block 721 on the locking slider 72 is pulled out of the hole 722 by the handle 723; the ejector plate 32 drives several ejector pins 33 to eject the molded part together with the mold core 63, and then the molded part is demolded from the mold core 63.

[0054] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A powder metallurgy injection molding die, characterized in that: include: A base plate (1) and a pad plate (2), wherein the pad plate (2) is disposed on the base plate (1); Top material assembly (3), which is located between bottom plate (1) and pad plate (2); Plate B (4) and Plate A (5) are sequentially disposed on the pad (2); A molding component (6) is disposed between plate B (4) and plate A (5); the molding component (6) includes a lower mold core (61), an upper mold core (62) and a mold core (63). The lower mold core (61) and the upper mold core (62) are respectively disposed on plate B (4) and plate A (5), and both of them are provided with a mold core (63) in a set of cavities formed by their closure; the mold core (63) and the lower mold core (61) form a product forming cavity; A set of auxiliary components (7) are provided on both sides of the molding component (6); the auxiliary components (7) include a set of guide blocks (71) and locking sliders (72). The guide block (71) is located between the lower mold core (61) and the upper mold core (62); the locking slider (72) is located between the guide blocks (71); the locking slider (72) is located on one side of the mold core (63) and is laterally guided by the guide block (71); The locking slider (72) has a locking block (721) at one end near the mold core (63); the mold core (63) has corresponding openings (722) for the locking blocks (721); the locking slider (72) can slide laterally so that the locking blocks (721) are inserted into the openings (722) on the mold core (63) to achieve locking operation; Top plate (8), which is located on plate A (5); injection port (81) is also provided on top plate (8).

2. The powder metallurgy injection molding die according to claim 1, characterized in that: The lower mold core (61) is provided with a buffer groove (611) in the middle; the buffer groove (611) is provided with inclined guide slots (612) on both sides; the guide slots (612) guide to the product forming cavity formed between the mold core (63) and the lower mold core (61).

3. The powder metallurgy injection molding die according to claim 1, characterized in that: The top material assembly (3) includes a set of square iron (31), a set of ejector plates (32) and a number of ejector pins (33); The square iron (31) is located on both sides of the base plate (1); the ejector plate (32) is located on the base plate (1) in sequence and between the square iron (31); the ejector (33) is erected on the ejector plate (32); the ejector (33) passes through the pad plate (2), B plate (4) and lower mold core (61) in sequence, and the top end is flush with the upper surface of the lower mold core (61).

4. The powder metallurgy injection molding die according to claim 1, characterized in that: The locking slider (72) has a handle (723) at the end away from the mold core (63).

5. The powder metallurgy injection molding die according to claim 4, characterized in that: The injection port (81) is aligned with one end of the buffer groove (611).

6. The powder metallurgy injection molding die according to claim 1, characterized in that: The B plate (4) and A plate (5) are provided with latches (41) on their sides.

7. The powder metallurgy injection molding die according to claim 1, characterized in that: Cooling water channels (9) are provided on both plate B (4) and plate A (5).

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